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1da177e4 LT |
1 | /* |
2 | * 53c710 driver. Modified from Drew Eckhardts driver | |
3 | * for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] | |
4 | * Check out PERM_OPTIONS and EXPECTED_CLOCK, which may be defined in the | |
5 | * relevant machine specific file (eg. mvme16x.[ch], amiga7xx.[ch]). | |
6 | * There are also currently some defines at the top of 53c7xx.scr. | |
7 | * The chip type is #defined in script_asm.pl, as well as the Makefile. | |
8 | * Host scsi ID expected to be 7 - see NCR53c7x0_init(). | |
9 | * | |
10 | * I have removed the PCI code and some of the 53c8xx specific code - | |
11 | * simply to make this file smaller and easier to manage. | |
12 | * | |
13 | * MVME16x issues: | |
14 | * Problems trying to read any chip registers in NCR53c7x0_init(), as they | |
15 | * may never have been set by 16xBug (eg. If kernel has come in over tftp). | |
16 | */ | |
17 | ||
18 | /* | |
19 | * Adapted for Linux/m68k Amiga platforms for the A4000T/A4091 and | |
20 | * WarpEngine SCSI controllers. | |
21 | * By Alan Hourihane <alanh@fairlite.demon.co.uk> | |
22 | * Thanks to Richard Hirst for making it possible with the MVME additions | |
23 | */ | |
24 | ||
25 | /* | |
26 | * 53c710 rev 0 doesn't support add with carry. Rev 1 and 2 does. To | |
27 | * overcome this problem you can define FORCE_DSA_ALIGNMENT, which ensures | |
28 | * that the DSA address is always xxxxxx00. If disconnection is not allowed, | |
29 | * then the script only ever tries to add small (< 256) positive offsets to | |
30 | * DSA, so lack of carry isn't a problem. FORCE_DSA_ALIGNMENT can, of course, | |
31 | * be defined for all chip revisions at a small cost in memory usage. | |
32 | */ | |
33 | ||
34 | #define FORCE_DSA_ALIGNMENT | |
35 | ||
36 | /* | |
37 | * Selection timer does not always work on the 53c710, depending on the | |
38 | * timing at the last disconnect, if this is a problem for you, try | |
39 | * using validids as detailed below. | |
40 | * | |
41 | * Options for the NCR7xx driver | |
42 | * | |
43 | * noasync:0 - disables sync and asynchronous negotiation | |
44 | * nosync:0 - disables synchronous negotiation (does async) | |
45 | * nodisconnect:0 - disables disconnection | |
46 | * validids:0x?? - Bitmask field that disallows certain ID's. | |
47 | * - e.g. 0x03 allows ID 0,1 | |
48 | * - 0x1F allows ID 0,1,2,3,4 | |
49 | * opthi:n - replace top word of options with 'n' | |
50 | * optlo:n - replace bottom word of options with 'n' | |
51 | * - ALWAYS SPECIFY opthi THEN optlo <<<<<<<<<< | |
52 | */ | |
53 | ||
54 | /* | |
55 | * PERM_OPTIONS are driver options which will be enabled for all NCR boards | |
56 | * in the system at driver initialization time. | |
57 | * | |
58 | * Don't THINK about touching these in PERM_OPTIONS : | |
59 | * OPTION_MEMORY_MAPPED | |
60 | * 680x0 doesn't have an IO map! | |
61 | * | |
62 | * OPTION_DEBUG_TEST1 | |
63 | * Test 1 does bus mastering and interrupt tests, which will help weed | |
64 | * out brain damaged main boards. | |
65 | * | |
66 | * Other PERM_OPTIONS settings are listed below. Note the actual options | |
67 | * required are set in the relevant file (mvme16x.c, amiga7xx.c, etc): | |
68 | * | |
69 | * OPTION_NO_ASYNC | |
70 | * Don't negotiate for asynchronous transfers on the first command | |
71 | * when OPTION_ALWAYS_SYNCHRONOUS is set. Useful for dain bramaged | |
72 | * devices which do something bad rather than sending a MESSAGE | |
73 | * REJECT back to us like they should if they can't cope. | |
74 | * | |
75 | * OPTION_SYNCHRONOUS | |
76 | * Enable support for synchronous transfers. Target negotiated | |
77 | * synchronous transfers will be responded to. To initiate | |
78 | * a synchronous transfer request, call | |
79 | * | |
80 | * request_synchronous (hostno, target) | |
81 | * | |
82 | * from within KGDB. | |
83 | * | |
84 | * OPTION_ALWAYS_SYNCHRONOUS | |
85 | * Negotiate for synchronous transfers with every target after | |
86 | * driver initialization or a SCSI bus reset. This is a bit dangerous, | |
87 | * since there are some dain bramaged SCSI devices which will accept | |
88 | * SDTR messages but keep talking asynchronously. | |
89 | * | |
90 | * OPTION_DISCONNECT | |
91 | * Enable support for disconnect/reconnect. To change the | |
92 | * default setting on a given host adapter, call | |
93 | * | |
94 | * request_disconnect (hostno, allow) | |
95 | * | |
96 | * where allow is non-zero to allow, 0 to disallow. | |
97 | * | |
98 | * If you really want to run 10MHz FAST SCSI-II transfers, you should | |
99 | * know that the NCR driver currently ignores parity information. Most | |
100 | * systems do 5MHz SCSI fine. I've seen a lot that have problems faster | |
101 | * than 8MHz. To play it safe, we only request 5MHz transfers. | |
102 | * | |
103 | * If you'd rather get 10MHz transfers, edit sdtr_message and change | |
104 | * the fourth byte from 50 to 25. | |
105 | */ | |
106 | ||
107 | /* | |
108 | * Sponsored by | |
109 | * iX Multiuser Multitasking Magazine | |
110 | * Hannover, Germany | |
111 | * hm@ix.de | |
112 | * | |
113 | * Copyright 1993, 1994, 1995 Drew Eckhardt | |
114 | * Visionary Computing | |
115 | * (Unix and Linux consulting and custom programming) | |
116 | * drew@PoohSticks.ORG | |
117 | * +1 (303) 786-7975 | |
118 | * | |
119 | * TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. | |
120 | * | |
121 | * For more information, please consult | |
122 | * | |
123 | * NCR53C810 | |
124 | * SCSI I/O Processor | |
125 | * Programmer's Guide | |
126 | * | |
127 | * NCR 53C810 | |
128 | * PCI-SCSI I/O Processor | |
129 | * Data Manual | |
130 | * | |
131 | * NCR 53C810/53C820 | |
132 | * PCI-SCSI I/O Processor Design In Guide | |
133 | * | |
134 | * For literature on Symbios Logic Inc. formerly NCR, SCSI, | |
135 | * and Communication products please call (800) 334-5454 or | |
136 | * (719) 536-3300. | |
137 | * | |
138 | * PCI BIOS Specification Revision | |
139 | * PCI Local Bus Specification | |
140 | * PCI System Design Guide | |
141 | * | |
142 | * PCI Special Interest Group | |
143 | * M/S HF3-15A | |
144 | * 5200 N.E. Elam Young Parkway | |
145 | * Hillsboro, Oregon 97124-6497 | |
146 | * +1 (503) 696-2000 | |
147 | * +1 (800) 433-5177 | |
148 | */ | |
149 | ||
150 | /* | |
151 | * Design issues : | |
152 | * The cumulative latency needed to propagate a read/write request | |
153 | * through the file system, buffer cache, driver stacks, SCSI host, and | |
154 | * SCSI device is ultimately the limiting factor in throughput once we | |
155 | * have a sufficiently fast host adapter. | |
156 | * | |
157 | * So, to maximize performance we want to keep the ratio of latency to data | |
158 | * transfer time to a minimum by | |
159 | * 1. Minimizing the total number of commands sent (typical command latency | |
160 | * including drive and bus mastering host overhead is as high as 4.5ms) | |
161 | * to transfer a given amount of data. | |
162 | * | |
163 | * This is accomplished by placing no arbitrary limit on the number | |
164 | * of scatter/gather buffers supported, since we can transfer 1K | |
165 | * per scatter/gather buffer without Eric's cluster patches, | |
166 | * 4K with. | |
167 | * | |
168 | * 2. Minimizing the number of fatal interrupts serviced, since | |
169 | * fatal interrupts halt the SCSI I/O processor. Basically, | |
170 | * this means offloading the practical maximum amount of processing | |
171 | * to the SCSI chip. | |
172 | * | |
173 | * On the NCR53c810/820/720, this is accomplished by using | |
174 | * interrupt-on-the-fly signals when commands complete, | |
175 | * and only handling fatal errors and SDTR / WDTR messages | |
176 | * in the host code. | |
177 | * | |
178 | * On the NCR53c710, interrupts are generated as on the NCR53c8x0, | |
179 | * only the lack of a interrupt-on-the-fly facility complicates | |
180 | * things. Also, SCSI ID registers and commands are | |
181 | * bit fielded rather than binary encoded. | |
182 | * | |
183 | * On the NCR53c700 and NCR53c700-66, operations that are done via | |
184 | * indirect, table mode on the more advanced chips must be | |
185 | * replaced by calls through a jump table which | |
186 | * acts as a surrogate for the DSA. Unfortunately, this | |
187 | * will mean that we must service an interrupt for each | |
188 | * disconnect/reconnect. | |
189 | * | |
190 | * 3. Eliminating latency by pipelining operations at the different levels. | |
191 | * | |
192 | * This driver allows a configurable number of commands to be enqueued | |
193 | * for each target/lun combination (experimentally, I have discovered | |
194 | * that two seems to work best) and will ultimately allow for | |
195 | * SCSI-II tagged queuing. | |
196 | * | |
197 | * | |
198 | * Architecture : | |
199 | * This driver is built around a Linux queue of commands waiting to | |
200 | * be executed, and a shared Linux/NCR array of commands to start. Commands | |
201 | * are transferred to the array by the run_process_issue_queue() function | |
202 | * which is called whenever a command completes. | |
203 | * | |
204 | * As commands are completed, the interrupt routine is triggered, | |
205 | * looks for commands in the linked list of completed commands with | |
206 | * valid status, removes these commands from a list of running commands, | |
207 | * calls the done routine, and flags their target/luns as not busy. | |
208 | * | |
209 | * Due to limitations in the intelligence of the NCR chips, certain | |
210 | * concessions are made. In many cases, it is easier to dynamically | |
211 | * generate/fix-up code rather than calculate on the NCR at run time. | |
212 | * So, code is generated or fixed up for | |
213 | * | |
214 | * - Handling data transfers, using a variable number of MOVE instructions | |
215 | * interspersed with CALL MSG_IN, WHEN MSGIN instructions. | |
216 | * | |
217 | * The DATAIN and DATAOUT routines are separate, so that an incorrect | |
218 | * direction can be trapped, and space isn't wasted. | |
219 | * | |
220 | * It may turn out that we're better off using some sort | |
221 | * of table indirect instruction in a loop with a variable | |
222 | * sized table on the NCR53c710 and newer chips. | |
223 | * | |
224 | * - Checking for reselection (NCR53c710 and better) | |
225 | * | |
226 | * - Handling the details of SCSI context switches (NCR53c710 and better), | |
227 | * such as reprogramming appropriate synchronous parameters, | |
228 | * removing the dsa structure from the NCR's queue of outstanding | |
229 | * commands, etc. | |
230 | * | |
231 | */ | |
232 | ||
233 | #include <linux/module.h> | |
234 | ||
1da177e4 LT |
235 | |
236 | #include <linux/types.h> | |
237 | #include <asm/setup.h> | |
238 | #include <asm/dma.h> | |
239 | #include <asm/io.h> | |
240 | #include <asm/system.h> | |
241 | #include <linux/delay.h> | |
242 | #include <linux/signal.h> | |
243 | #include <linux/sched.h> | |
244 | #include <linux/errno.h> | |
245 | #include <linux/string.h> | |
246 | #include <linux/slab.h> | |
247 | #include <linux/vmalloc.h> | |
248 | #include <linux/mm.h> | |
249 | #include <linux/ioport.h> | |
250 | #include <linux/time.h> | |
251 | #include <linux/blkdev.h> | |
252 | #include <linux/spinlock.h> | |
253 | #include <linux/interrupt.h> | |
254 | #include <asm/pgtable.h> | |
255 | ||
256 | #ifdef CONFIG_AMIGA | |
257 | #include <asm/amigahw.h> | |
258 | #include <asm/amigaints.h> | |
259 | #include <asm/irq.h> | |
260 | ||
261 | #define BIG_ENDIAN | |
262 | #define NO_IO_SPACE | |
263 | #endif | |
264 | ||
265 | #ifdef CONFIG_MVME16x | |
266 | #include <asm/mvme16xhw.h> | |
267 | ||
268 | #define BIG_ENDIAN | |
269 | #define NO_IO_SPACE | |
270 | #define VALID_IDS | |
271 | #endif | |
272 | ||
273 | #ifdef CONFIG_BVME6000 | |
274 | #include <asm/bvme6000hw.h> | |
275 | ||
276 | #define BIG_ENDIAN | |
277 | #define NO_IO_SPACE | |
278 | #define VALID_IDS | |
279 | #endif | |
280 | ||
281 | #include "scsi.h" | |
db9dff36 | 282 | #include <scsi/scsi_dbg.h> |
1da177e4 | 283 | #include <scsi/scsi_host.h> |
1abfd370 | 284 | #include <scsi/scsi_transport_spi.h> |
1da177e4 LT |
285 | #include "53c7xx.h" |
286 | #include <linux/stat.h> | |
287 | #include <linux/stddef.h> | |
288 | ||
289 | #ifdef NO_IO_SPACE | |
290 | /* | |
291 | * The following make the definitions in 53c7xx.h (write8, etc) smaller, | |
292 | * we don't have separate i/o space anyway. | |
293 | */ | |
294 | #undef inb | |
295 | #undef outb | |
296 | #undef inw | |
297 | #undef outw | |
298 | #undef inl | |
299 | #undef outl | |
300 | #define inb(x) 1 | |
301 | #define inw(x) 1 | |
302 | #define inl(x) 1 | |
303 | #define outb(x,y) 1 | |
304 | #define outw(x,y) 1 | |
305 | #define outl(x,y) 1 | |
306 | #endif | |
307 | ||
308 | static int check_address (unsigned long addr, int size); | |
309 | static void dump_events (struct Scsi_Host *host, int count); | |
310 | static Scsi_Cmnd * return_outstanding_commands (struct Scsi_Host *host, | |
311 | int free, int issue); | |
312 | static void hard_reset (struct Scsi_Host *host); | |
313 | static void ncr_scsi_reset (struct Scsi_Host *host); | |
314 | static void print_lots (struct Scsi_Host *host); | |
315 | static void set_synchronous (struct Scsi_Host *host, int target, int sxfer, | |
316 | int scntl3, int now_connected); | |
317 | static int datapath_residual (struct Scsi_Host *host); | |
318 | static const char * sbcl_to_phase (int sbcl); | |
319 | static void print_progress (Scsi_Cmnd *cmd); | |
320 | static void print_queues (struct Scsi_Host *host); | |
321 | static void process_issue_queue (unsigned long flags); | |
322 | static int shutdown (struct Scsi_Host *host); | |
323 | static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int result); | |
324 | static int disable (struct Scsi_Host *host); | |
325 | static int NCR53c7xx_run_tests (struct Scsi_Host *host); | |
326 | static irqreturn_t NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs); | |
327 | static void NCR53c7x0_intfly (struct Scsi_Host *host); | |
328 | static int ncr_halt (struct Scsi_Host *host); | |
329 | static void intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd | |
330 | *cmd); | |
331 | static void intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd); | |
332 | static void print_dsa (struct Scsi_Host *host, u32 *dsa, | |
333 | const char *prefix); | |
334 | static int print_insn (struct Scsi_Host *host, const u32 *insn, | |
335 | const char *prefix, int kernel); | |
336 | ||
337 | static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd); | |
338 | static void NCR53c7x0_init_fixup (struct Scsi_Host *host); | |
339 | static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct | |
340 | NCR53c7x0_cmd *cmd); | |
341 | static void NCR53c7x0_soft_reset (struct Scsi_Host *host); | |
342 | ||
343 | /* Size of event list (per host adapter) */ | |
344 | static int track_events = 0; | |
345 | static struct Scsi_Host *first_host = NULL; /* Head of list of NCR boards */ | |
d0be4a7d | 346 | static struct scsi_host_template *the_template = NULL; |
1da177e4 LT |
347 | |
348 | /* NCR53c710 script handling code */ | |
349 | ||
350 | #include "53c7xx_d.h" | |
351 | #ifdef A_int_debug_sync | |
352 | #define DEBUG_SYNC_INTR A_int_debug_sync | |
353 | #endif | |
354 | int NCR53c7xx_script_len = sizeof (SCRIPT); | |
355 | int NCR53c7xx_dsa_len = A_dsa_end + Ent_dsa_zero - Ent_dsa_code_template; | |
356 | #ifdef FORCE_DSA_ALIGNMENT | |
357 | int CmdPageStart = (0 - Ent_dsa_zero - sizeof(struct NCR53c7x0_cmd)) & 0xff; | |
358 | #endif | |
359 | ||
360 | static char *setup_strings[] = | |
361 | {"","","","","","","",""}; | |
362 | ||
6391a113 | 363 | #define MAX_SETUP_STRINGS ARRAY_SIZE(setup_strings) |
1da177e4 LT |
364 | #define SETUP_BUFFER_SIZE 200 |
365 | static char setup_buffer[SETUP_BUFFER_SIZE]; | |
366 | static char setup_used[MAX_SETUP_STRINGS]; | |
367 | ||
368 | void ncr53c7xx_setup (char *str, int *ints) | |
369 | { | |
370 | int i; | |
371 | char *p1, *p2; | |
372 | ||
373 | p1 = setup_buffer; | |
374 | *p1 = '\0'; | |
375 | if (str) | |
376 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); | |
377 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; | |
378 | p1 = setup_buffer; | |
379 | i = 0; | |
380 | while (*p1 && (i < MAX_SETUP_STRINGS)) { | |
381 | p2 = strchr(p1, ','); | |
382 | if (p2) { | |
383 | *p2 = '\0'; | |
384 | if (p1 != p2) | |
385 | setup_strings[i] = p1; | |
386 | p1 = p2 + 1; | |
387 | i++; | |
388 | } | |
389 | else { | |
390 | setup_strings[i] = p1; | |
391 | break; | |
392 | } | |
393 | } | |
394 | for (i=0; i<MAX_SETUP_STRINGS; i++) | |
395 | setup_used[i] = 0; | |
396 | } | |
397 | ||
398 | ||
399 | /* check_setup_strings() returns index if key found, 0 if not | |
400 | */ | |
401 | ||
402 | static int check_setup_strings(char *key, int *flags, int *val, char *buf) | |
403 | { | |
404 | int x; | |
405 | char *cp; | |
406 | ||
407 | for (x=0; x<MAX_SETUP_STRINGS; x++) { | |
408 | if (setup_used[x]) | |
409 | continue; | |
410 | if (!strncmp(setup_strings[x], key, strlen(key))) | |
411 | break; | |
412 | if (!strncmp(setup_strings[x], "next", strlen("next"))) | |
413 | return 0; | |
414 | } | |
415 | if (x == MAX_SETUP_STRINGS) | |
416 | return 0; | |
417 | setup_used[x] = 1; | |
418 | cp = setup_strings[x] + strlen(key); | |
419 | *val = -1; | |
420 | if (*cp != ':') | |
421 | return ++x; | |
422 | cp++; | |
423 | if ((*cp >= '0') && (*cp <= '9')) { | |
424 | *val = simple_strtoul(cp,NULL,0); | |
425 | } | |
426 | return ++x; | |
427 | } | |
428 | ||
429 | ||
430 | ||
431 | /* | |
432 | * KNOWN BUGS : | |
433 | * - There is some sort of conflict when the PPP driver is compiled with | |
434 | * support for 16 channels? | |
435 | * | |
436 | * - On systems which predate the 1.3.x initialization order change, | |
437 | * the NCR driver will cause Cannot get free page messages to appear. | |
438 | * These are harmless, but I don't know of an easy way to avoid them. | |
439 | * | |
440 | * - With OPTION_DISCONNECT, on two systems under unknown circumstances, | |
441 | * we get a PHASE MISMATCH with DSA set to zero (suggests that we | |
442 | * are occurring somewhere in the reselection code) where | |
443 | * DSP=some value DCMD|DBC=same value. | |
444 | * | |
445 | * Closer inspection suggests that we may be trying to execute | |
446 | * some portion of the DSA? | |
447 | * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) | |
448 | * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) | |
449 | * scsi0 : no current command : unexpected phase MSGIN. | |
450 | * DSP=0x1c46cc, DCMD|DBC=0x1c46ac, DSA=0x0 | |
451 | * DSPS=0x0, TEMP=0x1c3e70, DMODE=0x80 | |
452 | * scsi0 : DSP-> | |
453 | * 001c46cc : 0x001c46cc 0x00000000 | |
454 | * 001c46d4 : 0x001c5ea0 0x000011f8 | |
455 | * | |
456 | * Changed the print code in the phase_mismatch handler so | |
457 | * that we call print_lots to try to diagnose this. | |
458 | * | |
459 | */ | |
460 | ||
461 | /* | |
462 | * Possible future direction of architecture for max performance : | |
463 | * | |
464 | * We're using a single start array for the NCR chip. This is | |
465 | * sub-optimal, because we cannot add a command which would conflict with | |
466 | * an executing command to this start queue, and therefore must insert the | |
467 | * next command for a given I/T/L combination after the first has completed; | |
468 | * incurring our interrupt latency between SCSI commands. | |
469 | * | |
470 | * To allow further pipelining of the NCR and host CPU operation, we want | |
471 | * to set things up so that immediately on termination of a command destined | |
472 | * for a given LUN, we get that LUN busy again. | |
473 | * | |
474 | * To do this, we need to add a 32 bit pointer to which is jumped to | |
475 | * on completion of a command. If no new command is available, this | |
476 | * would point to the usual DSA issue queue select routine. | |
477 | * | |
478 | * If one were, it would point to a per-NCR53c7x0_cmd select routine | |
479 | * which starts execution immediately, inserting the command at the head | |
480 | * of the start queue if the NCR chip is selected or reselected. | |
481 | * | |
482 | * We would change so that we keep a list of outstanding commands | |
483 | * for each unit, rather than a single running_list. We'd insert | |
484 | * a new command into the right running list; if the NCR didn't | |
485 | * have something running for that yet, we'd put it in the | |
486 | * start queue as well. Some magic needs to happen to handle the | |
487 | * race condition between the first command terminating before the | |
488 | * new one is written. | |
489 | * | |
490 | * Potential for profiling : | |
491 | * Call do_gettimeofday(struct timeval *tv) to get 800ns resolution. | |
492 | */ | |
493 | ||
494 | ||
495 | /* | |
496 | * TODO : | |
497 | * 1. To support WIDE transfers, not much needs to happen. We | |
498 | * should do CHMOVE instructions instead of MOVEs when | |
499 | * we have scatter/gather segments of uneven length. When | |
500 | * we do this, we need to handle the case where we disconnect | |
501 | * between segments. | |
502 | * | |
503 | * 2. Currently, when Icky things happen we do a FATAL(). Instead, | |
504 | * we want to do an integrity check on the parts of the NCR hostdata | |
505 | * structure which were initialized at boot time; FATAL() if that | |
506 | * fails, and otherwise try to recover. Keep track of how many | |
507 | * times this has happened within a single SCSI command; if it | |
508 | * gets excessive, then FATAL(). | |
509 | * | |
510 | * 3. Parity checking is currently disabled, and a few things should | |
511 | * happen here now that we support synchronous SCSI transfers : | |
512 | * 1. On soft-reset, we shoould set the EPC (Enable Parity Checking) | |
513 | * and AAP (Assert SATN/ on parity error) bits in SCNTL0. | |
514 | * | |
515 | * 2. We should enable the parity interrupt in the SIEN0 register. | |
516 | * | |
517 | * 3. intr_phase_mismatch() needs to believe that message out is | |
518 | * always an "acceptable" phase to have a mismatch in. If | |
519 | * the old phase was MSG_IN, we should send a MESSAGE PARITY | |
520 | * error. If the old phase was something else, we should send | |
521 | * a INITIATOR_DETECTED_ERROR message. Note that this could | |
522 | * cause a RESTORE POINTERS message; so we should handle that | |
523 | * correctly first. Instead, we should probably do an | |
524 | * initiator_abort. | |
525 | * | |
526 | * 4. MPEE bit of CTEST4 should be set so we get interrupted if | |
527 | * we detect an error. | |
528 | * | |
529 | * | |
530 | * 5. The initial code has been tested on the NCR53c810. I don't | |
531 | * have access to NCR53c700, 700-66 (Forex boards), NCR53c710 | |
532 | * (NCR Pentium systems), NCR53c720, NCR53c820, or NCR53c825 boards to | |
533 | * finish development on those platforms. | |
534 | * | |
535 | * NCR53c820/825/720 - need to add wide transfer support, including WDTR | |
536 | * negotiation, programming of wide transfer capabilities | |
537 | * on reselection and table indirect selection. | |
538 | * | |
539 | * NCR53c710 - need to add fatal interrupt or GEN code for | |
540 | * command completion signaling. Need to modify all | |
541 | * SDID, SCID, etc. registers, and table indirect select code | |
542 | * since these use bit fielded (ie 1<<target) instead of | |
543 | * binary encoded target ids. Need to accommodate | |
544 | * different register mappings, probably scan through | |
545 | * the SCRIPT code and change the non SFBR register operand | |
546 | * of all MOVE instructions. | |
547 | * | |
548 | * It is rather worse than this actually, the 710 corrupts | |
549 | * both TEMP and DSA when you do a MOVE MEMORY. This | |
550 | * screws you up all over the place. MOVE MEMORY 4 with a | |
551 | * destination of DSA seems to work OK, which helps some. | |
552 | * Richard Hirst richard@sleepie.demon.co.uk | |
553 | * | |
554 | * NCR53c700/700-66 - need to add code to refix addresses on | |
555 | * every nexus change, eliminate all table indirect code, | |
556 | * very messy. | |
557 | * | |
558 | * 6. The NCR53c7x0 series is very popular on other platforms that | |
559 | * could be running Linux - ie, some high performance AMIGA SCSI | |
560 | * boards use it. | |
561 | * | |
562 | * So, I should include #ifdef'd code so that it is | |
563 | * compatible with these systems. | |
564 | * | |
565 | * Specifically, the little Endian assumptions I made in my | |
566 | * bit fields need to change, and if the NCR doesn't see memory | |
567 | * the right way, we need to provide options to reverse words | |
568 | * when the scripts are relocated. | |
569 | * | |
570 | * 7. Use vremap() to access memory mapped boards. | |
571 | */ | |
572 | ||
573 | /* | |
574 | * Allow for simultaneous existence of multiple SCSI scripts so we | |
575 | * can have a single driver binary for all of the family. | |
576 | * | |
577 | * - one for NCR53c700 and NCR53c700-66 chips (not yet supported) | |
578 | * - one for rest (only the NCR53c810, 815, 820, and 825 are currently | |
579 | * supported) | |
580 | * | |
581 | * So that we only need two SCSI scripts, we need to modify things so | |
582 | * that we fixup register accesses in READ/WRITE instructions, and | |
583 | * we'll also have to accommodate the bit vs. binary encoding of IDs | |
584 | * with the 7xx chips. | |
585 | */ | |
586 | ||
587 | #define ROUNDUP(adr,type) \ | |
588 | ((void *) (((long) (adr) + sizeof(type) - 1) & ~(sizeof(type) - 1))) | |
589 | ||
590 | ||
591 | /* | |
592 | * Function: issue_to_cmd | |
593 | * | |
594 | * Purpose: convert jump instruction in issue array to NCR53c7x0_cmd | |
595 | * structure pointer. | |
596 | * | |
597 | * Inputs; issue - pointer to start of NOP or JUMP instruction | |
598 | * in issue array. | |
599 | * | |
600 | * Returns: pointer to command on success; 0 if opcode is NOP. | |
601 | */ | |
602 | ||
603 | static inline struct NCR53c7x0_cmd * | |
604 | issue_to_cmd (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, | |
605 | u32 *issue) | |
606 | { | |
607 | return (issue[0] != hostdata->NOP_insn) ? | |
608 | /* | |
609 | * If the IF TRUE bit is set, it's a JUMP instruction. The | |
610 | * operand is a bus pointer to the dsa_begin routine for this DSA. The | |
611 | * dsa field of the NCR53c7x0_cmd structure starts with the | |
612 | * DSA code template. By converting to a virtual address, | |
613 | * subtracting the code template size, and offset of the | |
614 | * dsa field, we end up with a pointer to the start of the | |
615 | * structure (alternatively, we could use the | |
616 | * dsa_cmnd field, an anachronism from when we weren't | |
617 | * sure what the relationship between the NCR structures | |
618 | * and host structures were going to be. | |
619 | */ | |
620 | (struct NCR53c7x0_cmd *) ((char *) bus_to_virt (issue[1]) - | |
621 | (hostdata->E_dsa_code_begin - hostdata->E_dsa_code_template) - | |
622 | offsetof(struct NCR53c7x0_cmd, dsa)) | |
623 | /* If the IF TRUE bit is not set, it's a NOP */ | |
624 | : NULL; | |
625 | } | |
626 | ||
627 | ||
628 | /* | |
629 | * FIXME: we should junk these, in favor of synchronous_want and | |
630 | * wide_want in the NCR53c7x0_hostdata structure. | |
631 | */ | |
632 | ||
633 | /* Template for "preferred" synchronous transfer parameters. */ | |
634 | ||
635 | static const unsigned char sdtr_message[] = { | |
636 | #ifdef CONFIG_SCSI_NCR53C7xx_FAST | |
637 | EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 25 /* *4ns */, 8 /* off */ | |
638 | #else | |
639 | EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 50 /* *4ns */, 8 /* off */ | |
640 | #endif | |
641 | }; | |
642 | ||
643 | /* Template to request asynchronous transfers */ | |
644 | ||
645 | static const unsigned char async_message[] = { | |
646 | EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 0, 0 /* asynchronous */ | |
647 | }; | |
648 | ||
649 | /* Template for "preferred" WIDE transfer parameters */ | |
650 | ||
651 | static const unsigned char wdtr_message[] = { | |
652 | EXTENDED_MESSAGE, 2 /* length */, EXTENDED_WDTR, 1 /* 2^1 bytes */ | |
653 | }; | |
654 | ||
655 | #if 0 | |
656 | /* | |
657 | * Function : struct Scsi_Host *find_host (int host) | |
658 | * | |
659 | * Purpose : KGDB support function which translates a host number | |
660 | * to a host structure. | |
661 | * | |
662 | * Inputs : host - number of SCSI host | |
663 | * | |
664 | * Returns : NULL on failure, pointer to host structure on success. | |
665 | */ | |
666 | ||
667 | static struct Scsi_Host * | |
668 | find_host (int host) { | |
669 | struct Scsi_Host *h; | |
670 | for (h = first_host; h && h->host_no != host; h = h->next); | |
671 | if (!h) { | |
672 | printk (KERN_ALERT "scsi%d not found\n", host); | |
673 | return NULL; | |
674 | } else if (h->hostt != the_template) { | |
675 | printk (KERN_ALERT "scsi%d is not a NCR board\n", host); | |
676 | return NULL; | |
677 | } | |
678 | return h; | |
679 | } | |
680 | ||
681 | #if 0 | |
682 | /* | |
683 | * Function : request_synchronous (int host, int target) | |
684 | * | |
685 | * Purpose : KGDB interface which will allow us to negotiate for | |
686 | * synchronous transfers. This ill be replaced with a more | |
687 | * integrated function; perhaps a new entry in the scsi_host | |
688 | * structure, accessible via an ioctl() or perhaps /proc/scsi. | |
689 | * | |
690 | * Inputs : host - number of SCSI host; target - number of target. | |
691 | * | |
692 | * Returns : 0 when negotiation has been setup for next SCSI command, | |
693 | * -1 on failure. | |
694 | */ | |
695 | ||
696 | static int | |
697 | request_synchronous (int host, int target) { | |
698 | struct Scsi_Host *h; | |
699 | struct NCR53c7x0_hostdata *hostdata; | |
700 | unsigned long flags; | |
701 | if (target < 0) { | |
702 | printk (KERN_ALERT "target %d is bogus\n", target); | |
703 | return -1; | |
704 | } | |
705 | if (!(h = find_host (host))) | |
706 | return -1; | |
707 | else if (h->this_id == target) { | |
708 | printk (KERN_ALERT "target %d is host ID\n", target); | |
709 | return -1; | |
710 | } | |
2b89dad0 | 711 | else if (target >= h->max_id) { |
1da177e4 LT |
712 | printk (KERN_ALERT "target %d exceeds maximum of %d\n", target, |
713 | h->max_id); | |
714 | return -1; | |
715 | } | |
716 | hostdata = (struct NCR53c7x0_hostdata *)h->hostdata[0]; | |
717 | ||
718 | local_irq_save(flags); | |
719 | if (hostdata->initiate_sdtr & (1 << target)) { | |
720 | local_irq_restore(flags); | |
721 | printk (KERN_ALERT "target %d already doing SDTR\n", target); | |
722 | return -1; | |
723 | } | |
724 | hostdata->initiate_sdtr |= (1 << target); | |
725 | local_irq_restore(flags); | |
726 | return 0; | |
727 | } | |
728 | #endif | |
729 | ||
730 | /* | |
731 | * Function : request_disconnect (int host, int on_or_off) | |
732 | * | |
733 | * Purpose : KGDB support function, tells us to allow or disallow | |
734 | * disconnections. | |
735 | * | |
736 | * Inputs : host - number of SCSI host; on_or_off - non-zero to allow, | |
737 | * zero to disallow. | |
738 | * | |
739 | * Returns : 0 on success, * -1 on failure. | |
740 | */ | |
741 | ||
742 | static int | |
743 | request_disconnect (int host, int on_or_off) { | |
744 | struct Scsi_Host *h; | |
745 | struct NCR53c7x0_hostdata *hostdata; | |
746 | if (!(h = find_host (host))) | |
747 | return -1; | |
748 | hostdata = (struct NCR53c7x0_hostdata *) h->hostdata[0]; | |
749 | if (on_or_off) | |
750 | hostdata->options |= OPTION_DISCONNECT; | |
751 | else | |
752 | hostdata->options &= ~OPTION_DISCONNECT; | |
753 | return 0; | |
754 | } | |
755 | #endif | |
756 | ||
757 | /* | |
758 | * Function : static void NCR53c7x0_driver_init (struct Scsi_Host *host) | |
759 | * | |
760 | * Purpose : Initialize internal structures, as required on startup, or | |
761 | * after a SCSI bus reset. | |
762 | * | |
763 | * Inputs : host - pointer to this host adapter's structure | |
764 | */ | |
765 | ||
766 | static void | |
767 | NCR53c7x0_driver_init (struct Scsi_Host *host) { | |
768 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
769 | host->hostdata[0]; | |
770 | int i, j; | |
771 | u32 *ncrcurrent; | |
772 | ||
773 | for (i = 0; i < 16; ++i) { | |
774 | hostdata->request_sense[i] = 0; | |
775 | for (j = 0; j < 8; ++j) | |
776 | hostdata->busy[i][j] = 0; | |
777 | set_synchronous (host, i, /* sxfer */ 0, hostdata->saved_scntl3, 0); | |
778 | } | |
779 | hostdata->issue_queue = NULL; | |
780 | hostdata->running_list = hostdata->finished_queue = | |
781 | hostdata->ncrcurrent = NULL; | |
782 | for (i = 0, ncrcurrent = (u32 *) hostdata->schedule; | |
783 | i < host->can_queue; ++i, ncrcurrent += 2) { | |
784 | ncrcurrent[0] = hostdata->NOP_insn; | |
785 | ncrcurrent[1] = 0xdeadbeef; | |
786 | } | |
787 | ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | DBC_TCI_TRUE; | |
788 | ncrcurrent[1] = (u32) virt_to_bus (hostdata->script) + | |
789 | hostdata->E_wait_reselect; | |
790 | hostdata->reconnect_dsa_head = 0; | |
791 | hostdata->addr_reconnect_dsa_head = (u32) | |
792 | virt_to_bus((void *) &(hostdata->reconnect_dsa_head)); | |
793 | hostdata->expecting_iid = 0; | |
794 | hostdata->expecting_sto = 0; | |
795 | if (hostdata->options & OPTION_ALWAYS_SYNCHRONOUS) | |
796 | hostdata->initiate_sdtr = 0xffff; | |
797 | else | |
798 | hostdata->initiate_sdtr = 0; | |
799 | hostdata->talked_to = 0; | |
800 | hostdata->idle = 1; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Function : static int clock_to_ccf_710 (int clock) | |
805 | * | |
806 | * Purpose : Return the clock conversion factor for a given SCSI clock. | |
807 | * | |
808 | * Inputs : clock - SCSI clock expressed in Hz. | |
809 | * | |
810 | * Returns : ccf on success, -1 on failure. | |
811 | */ | |
812 | ||
813 | static int | |
814 | clock_to_ccf_710 (int clock) { | |
815 | if (clock <= 16666666) | |
816 | return -1; | |
817 | if (clock <= 25000000) | |
818 | return 2; /* Divide by 1.0 */ | |
819 | else if (clock <= 37500000) | |
820 | return 1; /* Divide by 1.5 */ | |
821 | else if (clock <= 50000000) | |
822 | return 0; /* Divide by 2.0 */ | |
823 | else if (clock <= 66000000) | |
824 | return 3; /* Divide by 3.0 */ | |
825 | else | |
826 | return -1; | |
827 | } | |
828 | ||
829 | /* | |
830 | * Function : static int NCR53c7x0_init (struct Scsi_Host *host) | |
831 | * | |
832 | * Purpose : initialize the internal structures for a given SCSI host | |
833 | * | |
834 | * Inputs : host - pointer to this host adapter's structure | |
835 | * | |
836 | * Preconditions : when this function is called, the chip_type | |
837 | * field of the hostdata structure MUST have been set. | |
838 | * | |
839 | * Returns : 0 on success, -1 on failure. | |
840 | */ | |
841 | ||
842 | int | |
843 | NCR53c7x0_init (struct Scsi_Host *host) { | |
844 | NCR53c7x0_local_declare(); | |
845 | int i, ccf; | |
846 | unsigned char revision; | |
847 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
848 | host->hostdata[0]; | |
849 | /* | |
850 | * There are some things which we need to know about in order to provide | |
851 | * a semblance of support. Print 'em if they aren't what we expect, | |
852 | * otherwise don't add to the noise. | |
853 | * | |
854 | * -1 means we don't know what to expect. | |
855 | */ | |
856 | int val, flags; | |
857 | char buf[32]; | |
858 | int expected_id = -1; | |
859 | int expected_clock = -1; | |
860 | int uninitialized = 0; | |
861 | #ifdef NO_IO_SPACE | |
862 | int expected_mapping = OPTION_MEMORY_MAPPED; | |
863 | #else | |
864 | int expected_mapping = OPTION_IO_MAPPED; | |
865 | #endif | |
866 | for (i=0;i<7;i++) | |
867 | hostdata->valid_ids[i] = 1; /* Default all ID's to scan */ | |
868 | ||
869 | /* Parse commandline flags */ | |
870 | if (check_setup_strings("noasync",&flags,&val,buf)) | |
871 | { | |
872 | hostdata->options |= OPTION_NO_ASYNC; | |
873 | hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS); | |
874 | } | |
875 | ||
876 | if (check_setup_strings("nosync",&flags,&val,buf)) | |
877 | { | |
878 | hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS); | |
879 | } | |
880 | ||
881 | if (check_setup_strings("nodisconnect",&flags,&val,buf)) | |
882 | hostdata->options &= ~OPTION_DISCONNECT; | |
883 | ||
884 | if (check_setup_strings("validids",&flags,&val,buf)) | |
885 | { | |
886 | for (i=0;i<7;i++) | |
887 | hostdata->valid_ids[i] = val & (1<<i); | |
888 | } | |
889 | ||
890 | if ((i = check_setup_strings("next",&flags,&val,buf))) | |
891 | { | |
892 | while (i) | |
893 | setup_used[--i] = 1; | |
894 | } | |
895 | ||
896 | if (check_setup_strings("opthi",&flags,&val,buf)) | |
897 | hostdata->options = (long long)val << 32; | |
898 | if (check_setup_strings("optlo",&flags,&val,buf)) | |
899 | hostdata->options |= val; | |
900 | ||
901 | NCR53c7x0_local_setup(host); | |
902 | switch (hostdata->chip) { | |
903 | case 710: | |
904 | case 770: | |
905 | hostdata->dstat_sir_intr = NCR53c7x0_dstat_sir_intr; | |
906 | hostdata->init_save_regs = NULL; | |
907 | hostdata->dsa_fixup = NCR53c7xx_dsa_fixup; | |
908 | hostdata->init_fixup = NCR53c7x0_init_fixup; | |
909 | hostdata->soft_reset = NCR53c7x0_soft_reset; | |
910 | hostdata->run_tests = NCR53c7xx_run_tests; | |
911 | expected_clock = hostdata->scsi_clock; | |
912 | expected_id = 7; | |
913 | break; | |
914 | default: | |
915 | printk ("scsi%d : chip type of %d is not supported yet, detaching.\n", | |
916 | host->host_no, hostdata->chip); | |
917 | scsi_unregister (host); | |
918 | return -1; | |
919 | } | |
920 | ||
921 | /* Assign constants accessed by NCR */ | |
922 | hostdata->NCR53c7xx_zero = 0; | |
923 | hostdata->NCR53c7xx_msg_reject = MESSAGE_REJECT; | |
924 | hostdata->NCR53c7xx_msg_abort = ABORT; | |
925 | hostdata->NCR53c7xx_msg_nop = NOP; | |
926 | hostdata->NOP_insn = (DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24; | |
927 | if (expected_mapping == -1 || | |
928 | (hostdata->options & (OPTION_MEMORY_MAPPED)) != | |
929 | (expected_mapping & OPTION_MEMORY_MAPPED)) | |
930 | printk ("scsi%d : using %s mapped access\n", host->host_no, | |
931 | (hostdata->options & OPTION_MEMORY_MAPPED) ? "memory" : | |
932 | "io"); | |
933 | ||
934 | hostdata->dmode = (hostdata->chip == 700 || hostdata->chip == 70066) ? | |
935 | DMODE_REG_00 : DMODE_REG_10; | |
936 | hostdata->istat = ((hostdata->chip / 100) == 8) ? | |
937 | ISTAT_REG_800 : ISTAT_REG_700; | |
938 | ||
939 | /* We have to assume that this may be the first access to the chip, so | |
940 | * we must set EA in DCNTL. */ | |
941 | ||
942 | NCR53c7x0_write8 (DCNTL_REG, DCNTL_10_EA|DCNTL_10_COM); | |
943 | ||
944 | ||
945 | /* Only the ISTAT register is readable when the NCR is running, so make | |
946 | sure it's halted. */ | |
947 | ncr_halt(host); | |
948 | ||
949 | /* | |
950 | * XXX - the NCR53c700 uses bitfielded registers for SCID, SDID, etc, | |
951 | * as does the 710 with one bit per SCSI ID. Conversely, the NCR | |
952 | * uses a normal, 3 bit binary representation of these values. | |
953 | * | |
954 | * Get the rest of the NCR documentation, and FIND OUT where the change | |
955 | * was. | |
956 | */ | |
957 | ||
958 | #if 0 | |
959 | /* May not be able to do this - chip my not have been set up yet */ | |
960 | tmp = hostdata->this_id_mask = NCR53c7x0_read8(SCID_REG); | |
961 | for (host->this_id = 0; tmp != 1; tmp >>=1, ++host->this_id); | |
962 | #else | |
963 | host->this_id = 7; | |
964 | #endif | |
965 | ||
966 | /* | |
967 | * Note : we should never encounter a board setup for ID0. So, | |
968 | * if we see ID0, assume that it was uninitialized and set it | |
969 | * to the industry standard 7. | |
970 | */ | |
971 | if (!host->this_id) { | |
972 | printk("scsi%d : initiator ID was %d, changing to 7\n", | |
973 | host->host_no, host->this_id); | |
974 | host->this_id = 7; | |
975 | hostdata->this_id_mask = 1 << 7; | |
976 | uninitialized = 1; | |
977 | }; | |
978 | ||
979 | if (expected_id == -1 || host->this_id != expected_id) | |
980 | printk("scsi%d : using initiator ID %d\n", host->host_no, | |
981 | host->this_id); | |
982 | ||
983 | /* | |
984 | * Save important registers to allow a soft reset. | |
985 | */ | |
986 | ||
987 | /* | |
988 | * CTEST7 controls cache snooping, burst mode, and support for | |
989 | * external differential drivers. This isn't currently used - the | |
990 | * default value may not be optimal anyway. | |
991 | * Even worse, it may never have been set up since reset. | |
992 | */ | |
993 | hostdata->saved_ctest7 = NCR53c7x0_read8(CTEST7_REG) & CTEST7_SAVE; | |
994 | revision = (NCR53c7x0_read8(CTEST8_REG) & 0xF0) >> 4; | |
995 | switch (revision) { | |
996 | case 1: revision = 0; break; | |
997 | case 2: revision = 1; break; | |
998 | case 4: revision = 2; break; | |
999 | case 8: revision = 3; break; | |
1000 | default: revision = 255; break; | |
1001 | } | |
1002 | printk("scsi%d: Revision 0x%x\n",host->host_no,revision); | |
1003 | ||
1004 | if ((revision == 0 || revision == 255) && (hostdata->options & (OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS))) | |
1005 | { | |
1006 | printk ("scsi%d: Disabling sync working and disconnect/reselect\n", | |
1007 | host->host_no); | |
1008 | hostdata->options &= ~(OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS); | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * On NCR53c700 series chips, DCNTL controls the SCSI clock divisor, | |
1013 | * on 800 series chips, it allows for a totem-pole IRQ driver. | |
1014 | * NOTE saved_dcntl currently overwritten in init function. | |
1015 | * The value read here may be garbage anyway, MVME16x board at least | |
1016 | * does not initialise chip if kernel arrived via tftp. | |
1017 | */ | |
1018 | ||
1019 | hostdata->saved_dcntl = NCR53c7x0_read8(DCNTL_REG); | |
1020 | ||
1021 | /* | |
1022 | * DMODE controls DMA burst length, and on 700 series chips, | |
1023 | * 286 mode and bus width | |
1024 | * NOTE: On MVME16x, chip may have been reset, so this could be a | |
1025 | * power-on/reset default value. | |
1026 | */ | |
1027 | hostdata->saved_dmode = NCR53c7x0_read8(hostdata->dmode); | |
1028 | ||
1029 | /* | |
1030 | * Now that burst length and enabled/disabled status is known, | |
1031 | * clue the user in on it. | |
1032 | */ | |
1033 | ||
1034 | ccf = clock_to_ccf_710 (expected_clock); | |
1035 | ||
1036 | for (i = 0; i < 16; ++i) | |
1037 | hostdata->cmd_allocated[i] = 0; | |
1038 | ||
1039 | if (hostdata->init_save_regs) | |
1040 | hostdata->init_save_regs (host); | |
1041 | if (hostdata->init_fixup) | |
1042 | hostdata->init_fixup (host); | |
1043 | ||
1044 | if (!the_template) { | |
1045 | the_template = host->hostt; | |
1046 | first_host = host; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Linux SCSI drivers have always been plagued with initialization | |
1051 | * problems - some didn't work with the BIOS disabled since they expected | |
1052 | * initialization from it, some didn't work when the networking code | |
1053 | * was enabled and registers got scrambled, etc. | |
1054 | * | |
1055 | * To avoid problems like this, in the future, we will do a soft | |
1056 | * reset on the SCSI chip, taking it back to a sane state. | |
1057 | */ | |
1058 | ||
1059 | hostdata->soft_reset (host); | |
1060 | ||
1061 | #if 1 | |
1062 | hostdata->debug_count_limit = -1; | |
1063 | #else | |
1064 | hostdata->debug_count_limit = 1; | |
1065 | #endif | |
1066 | hostdata->intrs = -1; | |
1067 | hostdata->resets = -1; | |
1068 | memcpy ((void *) hostdata->synchronous_want, (void *) sdtr_message, | |
1069 | sizeof (hostdata->synchronous_want)); | |
1070 | ||
1071 | NCR53c7x0_driver_init (host); | |
1072 | ||
1d6f359a | 1073 | if (request_irq(host->irq, NCR53c7x0_intr, IRQF_SHARED, "53c7xx", host)) |
1da177e4 LT |
1074 | { |
1075 | printk("scsi%d : IRQ%d not free, detaching\n", | |
1076 | host->host_no, host->irq); | |
1077 | goto err_unregister; | |
1078 | } | |
1079 | ||
1080 | if ((hostdata->run_tests && hostdata->run_tests(host) == -1) || | |
1081 | (hostdata->options & OPTION_DEBUG_TESTS_ONLY)) { | |
1082 | /* XXX Should disable interrupts, etc. here */ | |
1083 | goto err_free_irq; | |
1084 | } else { | |
1085 | if (host->io_port) { | |
1086 | host->n_io_port = 128; | |
1087 | if (!request_region (host->io_port, host->n_io_port, "ncr53c7xx")) | |
1088 | goto err_free_irq; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | if (NCR53c7x0_read8 (SBCL_REG) & SBCL_BSY) { | |
1093 | printk ("scsi%d : bus wedge, doing SCSI reset\n", host->host_no); | |
1094 | hard_reset (host); | |
1095 | } | |
1096 | return 0; | |
1097 | ||
1098 | err_free_irq: | |
1099 | free_irq(host->irq, NCR53c7x0_intr); | |
1100 | err_unregister: | |
1101 | scsi_unregister(host); | |
1102 | return -1; | |
1103 | } | |
1104 | ||
1105 | /* | |
d0be4a7d | 1106 | * Function : int ncr53c7xx_init(struct scsi_host_template *tpnt, int board, int chip, |
1da177e4 LT |
1107 | * unsigned long base, int io_port, int irq, int dma, long long options, |
1108 | * int clock); | |
1109 | * | |
1110 | * Purpose : initializes a NCR53c7,8x0 based on base addresses, | |
1111 | * IRQ, and DMA channel. | |
1112 | * | |
1113 | * Inputs : tpnt - Template for this SCSI adapter, board - board level | |
1114 | * product, chip - 710 | |
1115 | * | |
1116 | * Returns : 0 on success, -1 on failure. | |
1117 | * | |
1118 | */ | |
1119 | ||
1120 | int | |
d0be4a7d | 1121 | ncr53c7xx_init (struct scsi_host_template *tpnt, int board, int chip, |
1da177e4 LT |
1122 | unsigned long base, int io_port, int irq, int dma, |
1123 | long long options, int clock) | |
1124 | { | |
1125 | struct Scsi_Host *instance; | |
1126 | struct NCR53c7x0_hostdata *hostdata; | |
1127 | char chip_str[80]; | |
1128 | int script_len = 0, dsa_len = 0, size = 0, max_cmd_size = 0, | |
1129 | schedule_size = 0, ok = 0; | |
1130 | void *tmp; | |
1131 | unsigned long page; | |
1132 | ||
1133 | switch (chip) { | |
1134 | case 710: | |
1135 | case 770: | |
1136 | schedule_size = (tpnt->can_queue + 1) * 8 /* JUMP instruction size */; | |
1137 | script_len = NCR53c7xx_script_len; | |
1138 | dsa_len = NCR53c7xx_dsa_len; | |
1139 | options |= OPTION_INTFLY; | |
1140 | sprintf (chip_str, "NCR53c%d", chip); | |
1141 | break; | |
1142 | default: | |
1143 | printk("scsi-ncr53c7xx : unsupported SCSI chip %d\n", chip); | |
1144 | return -1; | |
1145 | } | |
1146 | ||
1147 | printk("scsi-ncr53c7xx : %s at memory 0x%lx, io 0x%x, irq %d", | |
1148 | chip_str, base, io_port, irq); | |
1149 | if (dma == DMA_NONE) | |
1150 | printk("\n"); | |
1151 | else | |
1152 | printk(", dma %d\n", dma); | |
1153 | ||
1154 | if (options & OPTION_DEBUG_PROBE_ONLY) { | |
1155 | printk ("scsi-ncr53c7xx : probe only enabled, aborting initialization\n"); | |
1156 | return -1; | |
1157 | } | |
1158 | ||
1159 | max_cmd_size = sizeof(struct NCR53c7x0_cmd) + dsa_len + | |
1160 | /* Size of dynamic part of command structure : */ | |
1161 | 2 * /* Worst case : we don't know if we need DATA IN or DATA out */ | |
1162 | ( 2 * /* Current instructions per scatter/gather segment */ | |
1163 | tpnt->sg_tablesize + | |
1164 | 3 /* Current startup / termination required per phase */ | |
1165 | ) * | |
1166 | 8 /* Each instruction is eight bytes */; | |
1167 | ||
1168 | /* Allocate fixed part of hostdata, dynamic part to hold appropriate | |
1169 | SCSI SCRIPT(tm) plus a single, maximum-sized NCR53c7x0_cmd structure. | |
1170 | ||
1171 | We need a NCR53c7x0_cmd structure for scan_scsis() when we are | |
1172 | not loaded as a module, and when we're loaded as a module, we | |
1173 | can't use a non-dynamically allocated structure because modules | |
1174 | are vmalloc()'d, which can allow structures to cross page | |
1175 | boundaries and breaks our physical/virtual address assumptions | |
1176 | for DMA. | |
1177 | ||
1178 | So, we stick it past the end of our hostdata structure. | |
1179 | ||
1180 | ASSUMPTION : | |
1181 | Regardless of how many simultaneous SCSI commands we allow, | |
1182 | the probe code only executes a _single_ instruction at a time, | |
1183 | so we only need one here, and don't need to allocate NCR53c7x0_cmd | |
1184 | structures for each target until we are no longer in scan_scsis | |
1185 | and kmalloc() has become functional (memory_init() happens | |
1186 | after all device driver initialization). | |
1187 | */ | |
1188 | ||
1189 | size = sizeof(struct NCR53c7x0_hostdata) + script_len + | |
1190 | /* Note that alignment will be guaranteed, since we put the command | |
1191 | allocated at probe time after the fixed-up SCSI script, which | |
1192 | consists of 32 bit words, aligned on a 32 bit boundary. But | |
1193 | on a 64bit machine we need 8 byte alignment for hostdata->free, so | |
1194 | we add in another 4 bytes to take care of potential misalignment | |
1195 | */ | |
1196 | (sizeof(void *) - sizeof(u32)) + max_cmd_size + schedule_size; | |
1197 | ||
1198 | page = __get_free_pages(GFP_ATOMIC,1); | |
1199 | if(page==0) | |
1200 | { | |
1201 | printk(KERN_ERR "53c7xx: out of memory.\n"); | |
1202 | return -ENOMEM; | |
1203 | } | |
1204 | #ifdef FORCE_DSA_ALIGNMENT | |
1205 | /* | |
1206 | * 53c710 rev.0 doesn't have an add-with-carry instruction. | |
1207 | * Ensure we allocate enough memory to force DSA alignment. | |
1208 | */ | |
1209 | size += 256; | |
1210 | #endif | |
1211 | /* Size should be < 8K, so we can fit it in two pages. */ | |
1212 | if (size > 8192) { | |
1213 | printk(KERN_ERR "53c7xx: hostdata > 8K\n"); | |
1214 | return -1; | |
1215 | } | |
1216 | ||
1217 | instance = scsi_register (tpnt, 4); | |
1218 | if (!instance) | |
1219 | { | |
1220 | free_page(page); | |
1221 | return -1; | |
1222 | } | |
1223 | instance->hostdata[0] = page; | |
1224 | memset((void *)instance->hostdata[0], 0, 8192); | |
1225 | cache_push(virt_to_phys((void *)(instance->hostdata[0])), 8192); | |
1226 | cache_clear(virt_to_phys((void *)(instance->hostdata[0])), 8192); | |
1227 | kernel_set_cachemode((void *)instance->hostdata[0], 8192, IOMAP_NOCACHE_SER); | |
1228 | ||
1229 | /* FIXME : if we ever support an ISA NCR53c7xx based board, we | |
1230 | need to check if the chip is running in a 16 bit mode, and if so | |
1231 | unregister it if it is past the 16M (0x1000000) mark */ | |
1232 | ||
1233 | hostdata = (struct NCR53c7x0_hostdata *)instance->hostdata[0]; | |
1234 | hostdata->size = size; | |
1235 | hostdata->script_count = script_len / sizeof(u32); | |
1236 | hostdata->board = board; | |
1237 | hostdata->chip = chip; | |
1238 | ||
1239 | /* | |
1240 | * Being memory mapped is more desirable, since | |
1241 | * | |
1242 | * - Memory accesses may be faster. | |
1243 | * | |
1244 | * - The destination and source address spaces are the same for | |
1245 | * all instructions, meaning we don't have to twiddle dmode or | |
1246 | * any other registers. | |
1247 | * | |
1248 | * So, we try for memory mapped, and if we don't get it, | |
1249 | * we go for port mapped, and that failing we tell the user | |
1250 | * it can't work. | |
1251 | */ | |
1252 | ||
1253 | if (base) { | |
1254 | instance->base = base; | |
1255 | /* Check for forced I/O mapping */ | |
1256 | if (!(options & OPTION_IO_MAPPED)) { | |
1257 | options |= OPTION_MEMORY_MAPPED; | |
1258 | ok = 1; | |
1259 | } | |
1260 | } else { | |
1261 | options &= ~OPTION_MEMORY_MAPPED; | |
1262 | } | |
1263 | ||
1264 | if (io_port) { | |
1265 | instance->io_port = io_port; | |
1266 | options |= OPTION_IO_MAPPED; | |
1267 | ok = 1; | |
1268 | } else { | |
1269 | options &= ~OPTION_IO_MAPPED; | |
1270 | } | |
1271 | ||
1272 | if (!ok) { | |
1273 | printk ("scsi%d : not initializing, no I/O or memory mapping known \n", | |
1274 | instance->host_no); | |
1275 | scsi_unregister (instance); | |
1276 | return -1; | |
1277 | } | |
1278 | instance->irq = irq; | |
1279 | instance->dma_channel = dma; | |
1280 | ||
1281 | hostdata->options = options; | |
1282 | hostdata->dsa_len = dsa_len; | |
1283 | hostdata->max_cmd_size = max_cmd_size; | |
1284 | hostdata->num_cmds = 1; | |
1285 | hostdata->scsi_clock = clock; | |
1286 | /* Initialize single command */ | |
1287 | tmp = (hostdata->script + hostdata->script_count); | |
1288 | #ifdef FORCE_DSA_ALIGNMENT | |
1289 | { | |
1290 | void *t = ROUNDUP(tmp, void *); | |
1291 | if (((u32)t & 0xff) > CmdPageStart) | |
1292 | t = (void *)((u32)t + 255); | |
1293 | t = (void *)(((u32)t & ~0xff) + CmdPageStart); | |
1294 | hostdata->free = t; | |
1295 | #if 0 | |
1296 | printk ("scsi: Registered size increased by 256 to %d\n", size); | |
1297 | printk ("scsi: CmdPageStart = 0x%02x\n", CmdPageStart); | |
1298 | printk ("scsi: tmp = 0x%08x, hostdata->free set to 0x%08x\n", | |
1299 | (u32)tmp, (u32)t); | |
1300 | #endif | |
1301 | } | |
1302 | #else | |
1303 | hostdata->free = ROUNDUP(tmp, void *); | |
1304 | #endif | |
1305 | hostdata->free->real = tmp; | |
1306 | hostdata->free->size = max_cmd_size; | |
1307 | hostdata->free->free = NULL; | |
1308 | hostdata->free->next = NULL; | |
1309 | hostdata->extra_allocate = 0; | |
1310 | ||
1311 | /* Allocate command start code space */ | |
1312 | hostdata->schedule = (chip == 700 || chip == 70066) ? | |
1313 | NULL : (u32 *) ((char *)hostdata->free + max_cmd_size); | |
1314 | ||
1315 | /* | |
1316 | * For diagnostic purposes, we don't really care how fast things blaze. | |
1317 | * For profiling, we want to access the 800ns resolution system clock, | |
1318 | * using a 'C' call on the host processor. | |
1319 | * | |
1320 | * Therefore, there's no need for the NCR chip to directly manipulate | |
1321 | * this data, and we should put it wherever is most convenient for | |
1322 | * Linux. | |
1323 | */ | |
1324 | if (track_events) | |
1325 | hostdata->events = (struct NCR53c7x0_event *) (track_events ? | |
1326 | vmalloc (sizeof (struct NCR53c7x0_event) * track_events) : NULL); | |
1327 | else | |
1328 | hostdata->events = NULL; | |
1329 | ||
1330 | if (hostdata->events) { | |
1331 | memset ((void *) hostdata->events, 0, sizeof(struct NCR53c7x0_event) * | |
1332 | track_events); | |
1333 | hostdata->event_size = track_events; | |
1334 | hostdata->event_index = 0; | |
1335 | } else | |
1336 | hostdata->event_size = 0; | |
1337 | ||
1338 | return NCR53c7x0_init(instance); | |
1339 | } | |
1340 | ||
1341 | ||
1342 | /* | |
1343 | * Function : static void NCR53c7x0_init_fixup (struct Scsi_Host *host) | |
1344 | * | |
1345 | * Purpose : copy and fixup the SCSI SCRIPTS(tm) code for this device. | |
1346 | * | |
1347 | * Inputs : host - pointer to this host adapter's structure | |
1348 | * | |
1349 | */ | |
1350 | ||
1351 | static void | |
1352 | NCR53c7x0_init_fixup (struct Scsi_Host *host) { | |
1353 | NCR53c7x0_local_declare(); | |
1354 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
1355 | host->hostdata[0]; | |
1356 | unsigned char tmp; | |
1357 | int i, ncr_to_memory, memory_to_ncr; | |
1358 | u32 base; | |
1359 | NCR53c7x0_local_setup(host); | |
1360 | ||
1361 | ||
1362 | /* XXX - NOTE : this code MUST be made endian aware */ | |
1363 | /* Copy code into buffer that was allocated at detection time. */ | |
1364 | memcpy ((void *) hostdata->script, (void *) SCRIPT, | |
1365 | sizeof(SCRIPT)); | |
1366 | /* Fixup labels */ | |
1367 | for (i = 0; i < PATCHES; ++i) | |
1368 | hostdata->script[LABELPATCHES[i]] += | |
1369 | virt_to_bus(hostdata->script); | |
1370 | /* Fixup addresses of constants that used to be EXTERNAL */ | |
1371 | ||
1372 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_abort, | |
1373 | virt_to_bus(&(hostdata->NCR53c7xx_msg_abort))); | |
1374 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_reject, | |
1375 | virt_to_bus(&(hostdata->NCR53c7xx_msg_reject))); | |
1376 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_zero, | |
1377 | virt_to_bus(&(hostdata->NCR53c7xx_zero))); | |
1378 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_sink, | |
1379 | virt_to_bus(&(hostdata->NCR53c7xx_sink))); | |
1380 | patch_abs_32 (hostdata->script, 0, NOP_insn, | |
1381 | virt_to_bus(&(hostdata->NOP_insn))); | |
1382 | patch_abs_32 (hostdata->script, 0, schedule, | |
1383 | virt_to_bus((void *) hostdata->schedule)); | |
1384 | ||
1385 | /* Fixup references to external variables: */ | |
1386 | for (i = 0; i < EXTERNAL_PATCHES_LEN; ++i) | |
1387 | hostdata->script[EXTERNAL_PATCHES[i].offset] += | |
1388 | virt_to_bus(EXTERNAL_PATCHES[i].address); | |
1389 | ||
1390 | /* | |
1391 | * Fixup absolutes set at boot-time. | |
1392 | * | |
1393 | * All non-code absolute variables suffixed with "dsa_" and "int_" | |
1394 | * are constants, and need no fixup provided the assembler has done | |
1395 | * it for us (I don't know what the "real" NCR assembler does in | |
1396 | * this case, my assembler does the right magic). | |
1397 | */ | |
1398 | ||
1399 | patch_abs_rwri_data (hostdata->script, 0, dsa_save_data_pointer, | |
1400 | Ent_dsa_code_save_data_pointer - Ent_dsa_zero); | |
1401 | patch_abs_rwri_data (hostdata->script, 0, dsa_restore_pointers, | |
1402 | Ent_dsa_code_restore_pointers - Ent_dsa_zero); | |
1403 | patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect, | |
1404 | Ent_dsa_code_check_reselect - Ent_dsa_zero); | |
1405 | ||
1406 | /* | |
1407 | * Just for the hell of it, preserve the settings of | |
1408 | * Burst Length and Enable Read Line bits from the DMODE | |
1409 | * register. Make sure SCRIPTS start automagically. | |
1410 | */ | |
1411 | ||
1412 | #if defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) | |
1413 | /* We know better what we want than 16xBug does! */ | |
1414 | tmp = DMODE_10_BL_8 | DMODE_10_FC2; | |
1415 | #else | |
1416 | tmp = NCR53c7x0_read8(DMODE_REG_10); | |
1417 | tmp &= (DMODE_BL_MASK | DMODE_10_FC2 | DMODE_10_FC1 | DMODE_710_PD | | |
1418 | DMODE_710_UO); | |
1419 | #endif | |
1420 | ||
1421 | if (!(hostdata->options & OPTION_MEMORY_MAPPED)) { | |
1422 | base = (u32) host->io_port; | |
1423 | memory_to_ncr = tmp|DMODE_800_DIOM; | |
1424 | ncr_to_memory = tmp|DMODE_800_SIOM; | |
1425 | } else { | |
1426 | base = virt_to_bus((void *)host->base); | |
1427 | memory_to_ncr = ncr_to_memory = tmp; | |
1428 | } | |
1429 | ||
1430 | /* SCRATCHB_REG_10 == SCRATCHA_REG_800, as it happens */ | |
1431 | patch_abs_32 (hostdata->script, 0, addr_scratch, base + SCRATCHA_REG_800); | |
1432 | patch_abs_32 (hostdata->script, 0, addr_temp, base + TEMP_REG); | |
1433 | patch_abs_32 (hostdata->script, 0, addr_dsa, base + DSA_REG); | |
1434 | ||
1435 | /* | |
1436 | * I needed some variables in the script to be accessible to | |
1437 | * both the NCR chip and the host processor. For these variables, | |
1438 | * I made the arbitrary decision to store them directly in the | |
1439 | * hostdata structure rather than in the RELATIVE area of the | |
1440 | * SCRIPTS. | |
1441 | */ | |
1442 | ||
1443 | ||
1444 | patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_memory, tmp); | |
1445 | patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_ncr, memory_to_ncr); | |
1446 | patch_abs_rwri_data (hostdata->script, 0, dmode_ncr_to_memory, ncr_to_memory); | |
1447 | ||
1448 | patch_abs_32 (hostdata->script, 0, msg_buf, | |
1449 | virt_to_bus((void *)&(hostdata->msg_buf))); | |
1450 | patch_abs_32 (hostdata->script, 0, reconnect_dsa_head, | |
1451 | virt_to_bus((void *)&(hostdata->reconnect_dsa_head))); | |
1452 | patch_abs_32 (hostdata->script, 0, addr_reconnect_dsa_head, | |
1453 | virt_to_bus((void *)&(hostdata->addr_reconnect_dsa_head))); | |
1454 | patch_abs_32 (hostdata->script, 0, reselected_identify, | |
1455 | virt_to_bus((void *)&(hostdata->reselected_identify))); | |
1456 | /* reselected_tag is currently unused */ | |
1457 | #if 0 | |
1458 | patch_abs_32 (hostdata->script, 0, reselected_tag, | |
1459 | virt_to_bus((void *)&(hostdata->reselected_tag))); | |
1460 | #endif | |
1461 | ||
1462 | patch_abs_32 (hostdata->script, 0, test_dest, | |
1463 | virt_to_bus((void*)&hostdata->test_dest)); | |
1464 | patch_abs_32 (hostdata->script, 0, test_src, | |
1465 | virt_to_bus(&hostdata->test_source)); | |
1466 | patch_abs_32 (hostdata->script, 0, saved_dsa, | |
1467 | virt_to_bus((void *)&hostdata->saved2_dsa)); | |
1468 | patch_abs_32 (hostdata->script, 0, emulfly, | |
1469 | virt_to_bus((void *)&hostdata->emulated_intfly)); | |
1470 | ||
1471 | patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect, | |
1472 | (unsigned char)(Ent_dsa_code_check_reselect - Ent_dsa_zero)); | |
1473 | ||
1474 | /* These are for event logging; the ncr_event enum contains the | |
1475 | actual interrupt numbers. */ | |
1476 | #ifdef A_int_EVENT_SELECT | |
1477 | patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT, (u32) EVENT_SELECT); | |
1478 | #endif | |
1479 | #ifdef A_int_EVENT_DISCONNECT | |
1480 | patch_abs_32 (hostdata->script, 0, int_EVENT_DISCONNECT, (u32) EVENT_DISCONNECT); | |
1481 | #endif | |
1482 | #ifdef A_int_EVENT_RESELECT | |
1483 | patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT, (u32) EVENT_RESELECT); | |
1484 | #endif | |
1485 | #ifdef A_int_EVENT_COMPLETE | |
1486 | patch_abs_32 (hostdata->script, 0, int_EVENT_COMPLETE, (u32) EVENT_COMPLETE); | |
1487 | #endif | |
1488 | #ifdef A_int_EVENT_IDLE | |
1489 | patch_abs_32 (hostdata->script, 0, int_EVENT_IDLE, (u32) EVENT_IDLE); | |
1490 | #endif | |
1491 | #ifdef A_int_EVENT_SELECT_FAILED | |
1492 | patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT_FAILED, | |
1493 | (u32) EVENT_SELECT_FAILED); | |
1494 | #endif | |
1495 | #ifdef A_int_EVENT_BEFORE_SELECT | |
1496 | patch_abs_32 (hostdata->script, 0, int_EVENT_BEFORE_SELECT, | |
1497 | (u32) EVENT_BEFORE_SELECT); | |
1498 | #endif | |
1499 | #ifdef A_int_EVENT_RESELECT_FAILED | |
1500 | patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT_FAILED, | |
1501 | (u32) EVENT_RESELECT_FAILED); | |
1502 | #endif | |
1503 | ||
1504 | /* | |
1505 | * Make sure the NCR and Linux code agree on the location of | |
1506 | * certain fields. | |
1507 | */ | |
1508 | ||
1509 | hostdata->E_accept_message = Ent_accept_message; | |
1510 | hostdata->E_command_complete = Ent_command_complete; | |
1511 | hostdata->E_cmdout_cmdout = Ent_cmdout_cmdout; | |
1512 | hostdata->E_data_transfer = Ent_data_transfer; | |
1513 | hostdata->E_debug_break = Ent_debug_break; | |
1514 | hostdata->E_dsa_code_template = Ent_dsa_code_template; | |
1515 | hostdata->E_dsa_code_template_end = Ent_dsa_code_template_end; | |
1516 | hostdata->E_end_data_transfer = Ent_end_data_transfer; | |
1517 | hostdata->E_initiator_abort = Ent_initiator_abort; | |
1518 | hostdata->E_msg_in = Ent_msg_in; | |
1519 | hostdata->E_other_transfer = Ent_other_transfer; | |
1520 | hostdata->E_other_in = Ent_other_in; | |
1521 | hostdata->E_other_out = Ent_other_out; | |
1522 | hostdata->E_reject_message = Ent_reject_message; | |
1523 | hostdata->E_respond_message = Ent_respond_message; | |
1524 | hostdata->E_select = Ent_select; | |
1525 | hostdata->E_select_msgout = Ent_select_msgout; | |
1526 | hostdata->E_target_abort = Ent_target_abort; | |
1527 | #ifdef Ent_test_0 | |
1528 | hostdata->E_test_0 = Ent_test_0; | |
1529 | #endif | |
1530 | hostdata->E_test_1 = Ent_test_1; | |
1531 | hostdata->E_test_2 = Ent_test_2; | |
1532 | #ifdef Ent_test_3 | |
1533 | hostdata->E_test_3 = Ent_test_3; | |
1534 | #endif | |
1535 | hostdata->E_wait_reselect = Ent_wait_reselect; | |
1536 | hostdata->E_dsa_code_begin = Ent_dsa_code_begin; | |
1537 | ||
1538 | hostdata->dsa_cmdout = A_dsa_cmdout; | |
1539 | hostdata->dsa_cmnd = A_dsa_cmnd; | |
1540 | hostdata->dsa_datain = A_dsa_datain; | |
1541 | hostdata->dsa_dataout = A_dsa_dataout; | |
1542 | hostdata->dsa_end = A_dsa_end; | |
1543 | hostdata->dsa_msgin = A_dsa_msgin; | |
1544 | hostdata->dsa_msgout = A_dsa_msgout; | |
1545 | hostdata->dsa_msgout_other = A_dsa_msgout_other; | |
1546 | hostdata->dsa_next = A_dsa_next; | |
1547 | hostdata->dsa_select = A_dsa_select; | |
1548 | hostdata->dsa_start = Ent_dsa_code_template - Ent_dsa_zero; | |
1549 | hostdata->dsa_status = A_dsa_status; | |
1550 | hostdata->dsa_jump_dest = Ent_dsa_code_fix_jump - Ent_dsa_zero + | |
1551 | 8 /* destination operand */; | |
1552 | ||
1553 | /* sanity check */ | |
1554 | if (A_dsa_fields_start != Ent_dsa_code_template_end - | |
1555 | Ent_dsa_zero) | |
1556 | printk("scsi%d : NCR dsa_fields start is %d not %d\n", | |
1557 | host->host_no, A_dsa_fields_start, Ent_dsa_code_template_end - | |
1558 | Ent_dsa_zero); | |
1559 | ||
1560 | printk("scsi%d : NCR code relocated to 0x%lx (virt 0x%p)\n", host->host_no, | |
1561 | virt_to_bus(hostdata->script), hostdata->script); | |
1562 | } | |
1563 | ||
1564 | /* | |
1565 | * Function : static int NCR53c7xx_run_tests (struct Scsi_Host *host) | |
1566 | * | |
1567 | * Purpose : run various verification tests on the NCR chip, | |
1568 | * including interrupt generation, and proper bus mastering | |
1569 | * operation. | |
1570 | * | |
1571 | * Inputs : host - a properly initialized Scsi_Host structure | |
1572 | * | |
1573 | * Preconditions : the NCR chip must be in a halted state. | |
1574 | * | |
1575 | * Returns : 0 if all tests were successful, -1 on error. | |
1576 | * | |
1577 | */ | |
1578 | ||
1579 | static int | |
1580 | NCR53c7xx_run_tests (struct Scsi_Host *host) { | |
1581 | NCR53c7x0_local_declare(); | |
1582 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
1583 | host->hostdata[0]; | |
1584 | unsigned long timeout; | |
1585 | u32 start; | |
1586 | int failed, i; | |
1587 | unsigned long flags; | |
1588 | NCR53c7x0_local_setup(host); | |
1589 | ||
1590 | /* The NCR chip _must_ be idle to run the test scripts */ | |
1591 | ||
1592 | local_irq_save(flags); | |
1593 | if (!hostdata->idle) { | |
1594 | printk ("scsi%d : chip not idle, aborting tests\n", host->host_no); | |
1595 | local_irq_restore(flags); | |
1596 | return -1; | |
1597 | } | |
1598 | ||
1599 | /* | |
1600 | * Check for functional interrupts, this could work as an | |
1601 | * autoprobe routine. | |
1602 | */ | |
1603 | ||
1604 | if ((hostdata->options & OPTION_DEBUG_TEST1) && | |
1605 | hostdata->state != STATE_DISABLED) { | |
1606 | hostdata->idle = 0; | |
1607 | hostdata->test_running = 1; | |
1608 | hostdata->test_completed = -1; | |
1609 | hostdata->test_dest = 0; | |
1610 | hostdata->test_source = 0xdeadbeef; | |
1611 | start = virt_to_bus (hostdata->script) + hostdata->E_test_1; | |
1612 | hostdata->state = STATE_RUNNING; | |
1613 | printk ("scsi%d : test 1", host->host_no); | |
1614 | NCR53c7x0_write32 (DSP_REG, start); | |
1615 | if (hostdata->options & OPTION_DEBUG_TRACE) | |
1616 | NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM | | |
1617 | DCNTL_STD); | |
1618 | printk (" started\n"); | |
1619 | local_irq_restore(flags); | |
1620 | ||
1621 | /* | |
1622 | * This is currently a .5 second timeout, since (in theory) no slow | |
1623 | * board will take that long. In practice, we've seen one | |
1624 | * pentium which occassionally fails with this, but works with | |
1625 | * 10 times as much? | |
1626 | */ | |
1627 | ||
1628 | timeout = jiffies + 5 * HZ / 10; | |
1629 | while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) | |
1630 | barrier(); | |
1631 | ||
1632 | failed = 1; | |
1633 | if (hostdata->test_completed == -1) | |
1634 | printk ("scsi%d : driver test 1 timed out%s\n",host->host_no , | |
1635 | (hostdata->test_dest == 0xdeadbeef) ? | |
1636 | " due to lost interrupt.\n" | |
1637 | " Please verify that the correct IRQ is being used for your board,\n" | |
1638 | : ""); | |
1639 | else if (hostdata->test_completed != 1) | |
1640 | printk ("scsi%d : test 1 bad interrupt value (%d)\n", | |
1641 | host->host_no, hostdata->test_completed); | |
1642 | else | |
1643 | failed = (hostdata->test_dest != 0xdeadbeef); | |
1644 | ||
1645 | if (hostdata->test_dest != 0xdeadbeef) { | |
1646 | printk ("scsi%d : driver test 1 read 0x%x instead of 0xdeadbeef indicating a\n" | |
1647 | " probable cache invalidation problem. Please configure caching\n" | |
1648 | " as write-through or disabled\n", | |
1649 | host->host_no, hostdata->test_dest); | |
1650 | } | |
1651 | ||
1652 | if (failed) { | |
1653 | printk ("scsi%d : DSP = 0x%p (script at 0x%p, start at 0x%x)\n", | |
1654 | host->host_no, bus_to_virt(NCR53c7x0_read32(DSP_REG)), | |
1655 | hostdata->script, start); | |
1656 | printk ("scsi%d : DSPS = 0x%x\n", host->host_no, | |
1657 | NCR53c7x0_read32(DSPS_REG)); | |
1658 | local_irq_restore(flags); | |
1659 | return -1; | |
1660 | } | |
1661 | hostdata->test_running = 0; | |
1662 | } | |
1663 | ||
1664 | if ((hostdata->options & OPTION_DEBUG_TEST2) && | |
1665 | hostdata->state != STATE_DISABLED) { | |
1666 | u32 dsa[48]; | |
1667 | unsigned char identify = IDENTIFY(0, 0); | |
1668 | unsigned char cmd[6]; | |
1669 | unsigned char data[36]; | |
1670 | unsigned char status = 0xff; | |
1671 | unsigned char msg = 0xff; | |
1672 | ||
1673 | cmd[0] = INQUIRY; | |
1674 | cmd[1] = cmd[2] = cmd[3] = cmd[5] = 0; | |
1675 | cmd[4] = sizeof(data); | |
1676 | ||
1677 | dsa[2] = 1; | |
1678 | dsa[3] = virt_to_bus(&identify); | |
1679 | dsa[4] = 6; | |
1680 | dsa[5] = virt_to_bus(&cmd); | |
1681 | dsa[6] = sizeof(data); | |
1682 | dsa[7] = virt_to_bus(&data); | |
1683 | dsa[8] = 1; | |
1684 | dsa[9] = virt_to_bus(&status); | |
1685 | dsa[10] = 1; | |
1686 | dsa[11] = virt_to_bus(&msg); | |
1687 | ||
1688 | for (i = 0; i < 6; ++i) { | |
1689 | #ifdef VALID_IDS | |
1690 | if (!hostdata->valid_ids[i]) | |
1691 | continue; | |
1692 | #endif | |
1693 | local_irq_disable(); | |
1694 | if (!hostdata->idle) { | |
1695 | printk ("scsi%d : chip not idle, aborting tests\n", host->host_no); | |
1696 | local_irq_restore(flags); | |
1697 | return -1; | |
1698 | } | |
1699 | ||
1700 | /* 710: bit mapped scsi ID, async */ | |
1701 | dsa[0] = (1 << i) << 16; | |
1702 | hostdata->idle = 0; | |
1703 | hostdata->test_running = 2; | |
1704 | hostdata->test_completed = -1; | |
1705 | start = virt_to_bus(hostdata->script) + hostdata->E_test_2; | |
1706 | hostdata->state = STATE_RUNNING; | |
1707 | NCR53c7x0_write32 (DSA_REG, virt_to_bus(dsa)); | |
1708 | NCR53c7x0_write32 (DSP_REG, start); | |
1709 | if (hostdata->options & OPTION_DEBUG_TRACE) | |
1710 | NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | | |
1711 | DCNTL_SSM | DCNTL_STD); | |
1712 | local_irq_restore(flags); | |
1713 | ||
1714 | timeout = jiffies + 5 * HZ; /* arbitrary */ | |
1715 | while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) | |
1716 | barrier(); | |
1717 | ||
1718 | NCR53c7x0_write32 (DSA_REG, 0); | |
1719 | ||
1720 | if (hostdata->test_completed == 2) { | |
1721 | data[35] = 0; | |
1722 | printk ("scsi%d : test 2 INQUIRY to target %d, lun 0 : %s\n", | |
1723 | host->host_no, i, data + 8); | |
1724 | printk ("scsi%d : status ", host->host_no); | |
db9dff36 | 1725 | scsi_print_status (status); |
1da177e4 | 1726 | printk ("\nscsi%d : message ", host->host_no); |
1abfd370 | 1727 | spi_print_msg(&msg); |
1da177e4 LT |
1728 | printk ("\n"); |
1729 | } else if (hostdata->test_completed == 3) { | |
1730 | printk("scsi%d : test 2 no connection with target %d\n", | |
1731 | host->host_no, i); | |
1732 | if (!hostdata->idle) { | |
1733 | printk("scsi%d : not idle\n", host->host_no); | |
1734 | local_irq_restore(flags); | |
1735 | return -1; | |
1736 | } | |
1737 | } else if (hostdata->test_completed == -1) { | |
1738 | printk ("scsi%d : test 2 timed out\n", host->host_no); | |
1739 | local_irq_restore(flags); | |
1740 | return -1; | |
1741 | } | |
1742 | hostdata->test_running = 0; | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | local_irq_restore(flags); | |
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Function : static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) | |
1752 | * | |
1753 | * Purpose : copy the NCR53c8xx dsa structure into cmd's dsa buffer, | |
1754 | * performing all necessary relocation. | |
1755 | * | |
1756 | * Inputs : cmd, a NCR53c7x0_cmd structure with a dsa area large | |
1757 | * enough to hold the NCR53c8xx dsa. | |
1758 | */ | |
1759 | ||
1760 | static void | |
1761 | NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) { | |
1762 | Scsi_Cmnd *c = cmd->cmd; | |
1763 | struct Scsi_Host *host = c->device->host; | |
1764 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
1765 | host->hostdata[0]; | |
1766 | int i; | |
1767 | ||
1768 | memcpy (cmd->dsa, hostdata->script + (hostdata->E_dsa_code_template / 4), | |
1769 | hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template); | |
1770 | ||
1771 | /* | |
1772 | * Note : within the NCR 'C' code, dsa points to the _start_ | |
1773 | * of the DSA structure, and _not_ the offset of dsa_zero within | |
1774 | * that structure used to facilitate shorter signed offsets | |
1775 | * for the 8 bit ALU. | |
1776 | * | |
1777 | * The implications of this are that | |
1778 | * | |
1779 | * - 32 bit A_dsa_* absolute values require an additional | |
1780 | * dsa_zero added to their value to be correct, since they are | |
1781 | * relative to dsa_zero which is in essentially a separate | |
1782 | * space from the code symbols. | |
1783 | * | |
1784 | * - All other symbols require no special treatment. | |
1785 | */ | |
1786 | ||
1787 | patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1788 | dsa_temp_lun, c->device->lun); | |
1789 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1790 | dsa_temp_addr_next, virt_to_bus(&cmd->dsa_next_addr)); | |
1791 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1792 | dsa_temp_next, virt_to_bus(cmd->dsa) + Ent_dsa_zero - | |
1793 | Ent_dsa_code_template + A_dsa_next); | |
1794 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1795 | dsa_temp_sync, virt_to_bus((void *)hostdata->sync[c->device->id].script)); | |
1796 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1797 | dsa_sscf_710, virt_to_bus((void *)&hostdata->sync[c->device->id].sscf_710)); | |
1798 | patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1799 | dsa_temp_target, 1 << c->device->id); | |
1800 | /* XXX - new pointer stuff */ | |
1801 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1802 | dsa_temp_addr_saved_pointer, virt_to_bus(&cmd->saved_data_pointer)); | |
1803 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1804 | dsa_temp_addr_saved_residual, virt_to_bus(&cmd->saved_residual)); | |
1805 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1806 | dsa_temp_addr_residual, virt_to_bus(&cmd->residual)); | |
1807 | ||
1808 | /* XXX - new start stuff */ | |
1809 | ||
1810 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), | |
1811 | dsa_temp_addr_dsa_value, virt_to_bus(&cmd->dsa_addr)); | |
1812 | } | |
1813 | ||
1814 | /* | |
1815 | * Function : run_process_issue_queue (void) | |
1816 | * | |
1817 | * Purpose : insure that the coroutine is running and will process our | |
1818 | * request. process_issue_queue_running is checked/set here (in an | |
1819 | * inline function) rather than in process_issue_queue itself to reduce | |
1820 | * the chances of stack overflow. | |
1821 | * | |
1822 | */ | |
1823 | ||
1824 | static volatile int process_issue_queue_running = 0; | |
1825 | ||
1826 | static __inline__ void | |
1827 | run_process_issue_queue(void) { | |
1828 | unsigned long flags; | |
1829 | local_irq_save(flags); | |
1830 | if (!process_issue_queue_running) { | |
1831 | process_issue_queue_running = 1; | |
1832 | process_issue_queue(flags); | |
1833 | /* | |
1834 | * process_issue_queue_running is cleared in process_issue_queue | |
1835 | * once it can't do more work, and process_issue_queue exits with | |
1836 | * interrupts disabled. | |
1837 | */ | |
1838 | } | |
1839 | local_irq_restore(flags); | |
1840 | } | |
1841 | ||
1842 | /* | |
1843 | * Function : static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int | |
1844 | * result) | |
1845 | * | |
1846 | * Purpose : mark SCSI command as finished, OR'ing the host portion | |
1847 | * of the result word into the result field of the corresponding | |
1848 | * Scsi_Cmnd structure, and removing it from the internal queues. | |
1849 | * | |
1850 | * Inputs : cmd - command, result - entire result field | |
1851 | * | |
1852 | * Preconditions : the NCR chip should be in a halted state when | |
1853 | * abnormal_finished is run, since it modifies structures which | |
1854 | * the NCR expects to have exclusive access to. | |
1855 | */ | |
1856 | ||
1857 | static void | |
1858 | abnormal_finished (struct NCR53c7x0_cmd *cmd, int result) { | |
1859 | Scsi_Cmnd *c = cmd->cmd; | |
1860 | struct Scsi_Host *host = c->device->host; | |
1861 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
1862 | host->hostdata[0]; | |
1863 | unsigned long flags; | |
1864 | int left, found; | |
1865 | volatile struct NCR53c7x0_cmd * linux_search; | |
1866 | volatile struct NCR53c7x0_cmd * volatile *linux_prev; | |
1867 | volatile u32 *ncr_prev, *ncrcurrent, ncr_search; | |
1868 | ||
1869 | #if 0 | |
1870 | printk ("scsi%d: abnormal finished\n", host->host_no); | |
1871 | #endif | |
1872 | ||
1873 | local_irq_save(flags); | |
1874 | found = 0; | |
1875 | /* | |
1876 | * Traverse the NCR issue array until we find a match or run out | |
1877 | * of instructions. Instructions in the NCR issue array are | |
1878 | * either JUMP or NOP instructions, which are 2 words in length. | |
1879 | */ | |
1880 | ||
1881 | ||
1882 | for (found = 0, left = host->can_queue, ncrcurrent = hostdata->schedule; | |
1883 | left > 0; --left, ncrcurrent += 2) | |
1884 | { | |
1885 | if (issue_to_cmd (host, hostdata, (u32 *) ncrcurrent) == cmd) | |
1886 | { | |
1887 | ncrcurrent[0] = hostdata->NOP_insn; | |
1888 | ncrcurrent[1] = 0xdeadbeef; | |
1889 | ++found; | |
1890 | break; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | /* | |
1895 | * Traverse the NCR reconnect list of DSA structures until we find | |
1896 | * a pointer to this dsa or have found too many command structures. | |
1897 | * We let prev point at the next field of the previous element or | |
1898 | * head of the list, so we don't do anything different for removing | |
1899 | * the head element. | |
1900 | */ | |
1901 | ||
1902 | for (left = host->can_queue, | |
1903 | ncr_search = hostdata->reconnect_dsa_head, | |
1904 | ncr_prev = &hostdata->reconnect_dsa_head; | |
1905 | left >= 0 && ncr_search && | |
1906 | ((char*)bus_to_virt(ncr_search) + hostdata->dsa_start) | |
1907 | != (char *) cmd->dsa; | |
1908 | ncr_prev = (u32*) ((char*)bus_to_virt(ncr_search) + | |
1909 | hostdata->dsa_next), ncr_search = *ncr_prev, --left); | |
1910 | ||
1911 | if (left < 0) | |
1912 | printk("scsi%d: loop detected in ncr reconncect list\n", | |
1913 | host->host_no); | |
1914 | else if (ncr_search) { | |
1915 | if (found) | |
1916 | printk("scsi%d: scsi %ld in ncr issue array and reconnect lists\n", | |
1917 | host->host_no, c->pid); | |
1918 | else { | |
1919 | volatile u32 * next = (u32 *) | |
1920 | ((char *)bus_to_virt(ncr_search) + hostdata->dsa_next); | |
1921 | *ncr_prev = *next; | |
1922 | /* If we're at the tail end of the issue queue, update that pointer too. */ | |
1923 | found = 1; | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | /* | |
1928 | * Traverse the host running list until we find this command or discover | |
1929 | * we have too many elements, pointing linux_prev at the next field of the | |
1930 | * linux_previous element or head of the list, search at this element. | |
1931 | */ | |
1932 | ||
1933 | for (left = host->can_queue, linux_search = hostdata->running_list, | |
1934 | linux_prev = &hostdata->running_list; | |
1935 | left >= 0 && linux_search && linux_search != cmd; | |
1936 | linux_prev = &(linux_search->next), | |
1937 | linux_search = linux_search->next, --left); | |
1938 | ||
1939 | if (left < 0) | |
1940 | printk ("scsi%d: loop detected in host running list for scsi pid %ld\n", | |
1941 | host->host_no, c->pid); | |
1942 | else if (linux_search) { | |
1943 | *linux_prev = linux_search->next; | |
1944 | --hostdata->busy[c->device->id][c->device->lun]; | |
1945 | } | |
1946 | ||
1947 | /* Return the NCR command structure to the free list */ | |
1948 | cmd->next = hostdata->free; | |
1949 | hostdata->free = cmd; | |
1950 | c->host_scribble = NULL; | |
1951 | ||
1952 | /* And return */ | |
1953 | c->result = result; | |
1954 | c->scsi_done(c); | |
1955 | ||
1956 | local_irq_restore(flags); | |
1957 | run_process_issue_queue(); | |
1958 | } | |
1959 | ||
1960 | /* | |
1961 | * Function : static void intr_break (struct Scsi_Host *host, | |
1962 | * struct NCR53c7x0_cmd *cmd) | |
1963 | * | |
1964 | * Purpose : Handler for breakpoint interrupts from a SCSI script | |
1965 | * | |
1966 | * Inputs : host - pointer to this host adapter's structure, | |
1967 | * cmd - pointer to the command (if any) dsa was pointing | |
1968 | * to. | |
1969 | * | |
1970 | */ | |
1971 | ||
1972 | static void | |
1973 | intr_break (struct Scsi_Host *host, struct | |
1974 | NCR53c7x0_cmd *cmd) { | |
1975 | NCR53c7x0_local_declare(); | |
1976 | struct NCR53c7x0_break *bp; | |
1977 | #if 0 | |
1978 | Scsi_Cmnd *c = cmd ? cmd->cmd : NULL; | |
1979 | #endif | |
1980 | u32 *dsp; | |
1981 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
1982 | host->hostdata[0]; | |
1983 | unsigned long flags; | |
1984 | NCR53c7x0_local_setup(host); | |
1985 | ||
1986 | /* | |
1987 | * Find the break point corresponding to this address, and | |
1988 | * dump the appropriate debugging information to standard | |
1989 | * output. | |
1990 | */ | |
1991 | local_irq_save(flags); | |
1992 | dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG)); | |
1993 | for (bp = hostdata->breakpoints; bp && bp->address != dsp; | |
1994 | bp = bp->next); | |
1995 | if (!bp) | |
1996 | panic("scsi%d : break point interrupt from %p with no breakpoint!", | |
1997 | host->host_no, dsp); | |
1998 | ||
1999 | /* | |
2000 | * Configure the NCR chip for manual start mode, so that we can | |
2001 | * point the DSP register at the instruction that follows the | |
2002 | * INT int_debug_break instruction. | |
2003 | */ | |
2004 | ||
2005 | NCR53c7x0_write8 (hostdata->dmode, | |
2006 | NCR53c7x0_read8(hostdata->dmode)|DMODE_MAN); | |
2007 | ||
2008 | /* | |
2009 | * And update the DSP register, using the size of the old | |
2010 | * instruction in bytes. | |
2011 | */ | |
2012 | ||
2013 | local_irq_restore(flags); | |
2014 | } | |
2015 | /* | |
2016 | * Function : static void print_synchronous (const char *prefix, | |
2017 | * const unsigned char *msg) | |
2018 | * | |
2019 | * Purpose : print a pretty, user and machine parsable representation | |
2020 | * of a SDTR message, including the "real" parameters, data | |
2021 | * clock so we can tell transfer rate at a glance. | |
2022 | * | |
2023 | * Inputs ; prefix - text to prepend, msg - SDTR message (5 bytes) | |
2024 | */ | |
2025 | ||
2026 | static void | |
2027 | print_synchronous (const char *prefix, const unsigned char *msg) { | |
2028 | if (msg[4]) { | |
2029 | int Hz = 1000000000 / (msg[3] * 4); | |
2030 | int integer = Hz / 1000000; | |
2031 | int fraction = (Hz - (integer * 1000000)) / 10000; | |
2032 | printk ("%speriod %dns offset %d %d.%02dMHz %s SCSI%s\n", | |
2033 | prefix, (int) msg[3] * 4, (int) msg[4], integer, fraction, | |
2034 | (((msg[3] * 4) < 200) ? "FAST" : "synchronous"), | |
2035 | (((msg[3] * 4) < 200) ? "-II" : "")); | |
2036 | } else | |
2037 | printk ("%sasynchronous SCSI\n", prefix); | |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * Function : static void set_synchronous (struct Scsi_Host *host, | |
2042 | * int target, int sxfer, int scntl3, int now_connected) | |
2043 | * | |
2044 | * Purpose : reprogram transfers between the selected SCSI initiator and | |
2045 | * target with the given register values; in the indirect | |
2046 | * select operand, reselection script, and chip registers. | |
2047 | * | |
2048 | * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, | |
2049 | * sxfer and scntl3 - NCR registers. now_connected - if non-zero, | |
2050 | * we should reprogram the registers now too. | |
2051 | * | |
2052 | * NOTE: For 53c710, scntl3 is actually used for SCF bits from | |
2053 | * SBCL, as we don't have a SCNTL3. | |
2054 | */ | |
2055 | ||
2056 | static void | |
2057 | set_synchronous (struct Scsi_Host *host, int target, int sxfer, int scntl3, | |
2058 | int now_connected) { | |
2059 | NCR53c7x0_local_declare(); | |
2060 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
2061 | host->hostdata[0]; | |
2062 | u32 *script; | |
2063 | NCR53c7x0_local_setup(host); | |
2064 | ||
2065 | /* These are eight bit registers */ | |
2066 | sxfer &= 0xff; | |
2067 | scntl3 &= 0xff; | |
2068 | ||
2069 | hostdata->sync[target].sxfer_sanity = sxfer; | |
2070 | hostdata->sync[target].scntl3_sanity = scntl3; | |
2071 | ||
2072 | /* | |
2073 | * HARD CODED : synchronous script is EIGHT words long. This | |
2074 | * must agree with 53c7.8xx.h | |
2075 | */ | |
2076 | ||
2077 | if ((hostdata->chip != 700) && (hostdata->chip != 70066)) { | |
2078 | hostdata->sync[target].select_indirect = (1 << target) << 16 | | |
2079 | (sxfer << 8); | |
2080 | hostdata->sync[target].sscf_710 = scntl3; | |
2081 | ||
2082 | script = (u32 *) hostdata->sync[target].script; | |
2083 | ||
2084 | /* XXX - add NCR53c7x0 code to reprogram SCF bits if we want to */ | |
2085 | script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY | | |
2086 | DCMD_RWRI_OP_MOVE) << 24) | | |
2087 | (SBCL_REG << 16) | (scntl3 << 8); | |
2088 | script[1] = 0; | |
2089 | script += 2; | |
2090 | ||
2091 | script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY | | |
2092 | DCMD_RWRI_OP_MOVE) << 24) | | |
2093 | (SXFER_REG << 16) | (sxfer << 8); | |
2094 | script[1] = 0; | |
2095 | script += 2; | |
2096 | ||
2097 | #ifdef DEBUG_SYNC_INTR | |
2098 | if (hostdata->options & OPTION_DEBUG_DISCONNECT) { | |
2099 | script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_INT) << 24) | DBC_TCI_TRUE; | |
2100 | script[1] = DEBUG_SYNC_INTR; | |
2101 | script += 2; | |
2102 | } | |
2103 | #endif | |
2104 | ||
2105 | script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_RETURN) << 24) | DBC_TCI_TRUE; | |
2106 | script[1] = 0; | |
2107 | script += 2; | |
2108 | } | |
2109 | ||
2110 | if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) | |
2111 | printk ("scsi%d : target %d sync parameters are sxfer=0x%x, scntl3=0x%x\n", | |
2112 | host->host_no, target, sxfer, scntl3); | |
2113 | ||
2114 | if (now_connected) { | |
2115 | NCR53c7x0_write8(SBCL_REG, scntl3); | |
2116 | NCR53c7x0_write8(SXFER_REG, sxfer); | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | ||
2121 | /* | |
2122 | * Function : static int asynchronous (struct Scsi_Host *host, int target) | |
2123 | * | |
2124 | * Purpose : reprogram between the selected SCSI Host adapter and target | |
2125 | * (assumed to be currently connected) for asynchronous transfers. | |
2126 | * | |
2127 | * Inputs : host - SCSI host structure, target - numeric target ID. | |
2128 | * | |
2129 | * Preconditions : the NCR chip should be in one of the halted states | |
2130 | */ | |
2131 | ||
2132 | static void | |
2133 | asynchronous (struct Scsi_Host *host, int target) { | |
2134 | NCR53c7x0_local_declare(); | |
2135 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
2136 | host->hostdata[0]; | |
2137 | NCR53c7x0_local_setup(host); | |
2138 | set_synchronous (host, target, /* no offset */ 0, hostdata->saved_scntl3, | |
2139 | 1); | |
2140 | printk ("scsi%d : setting target %d to asynchronous SCSI\n", | |
2141 | host->host_no, target); | |
2142 | } | |
2143 | ||
2144 | /* | |
2145 | * XXX - do we want to go out of our way (ie, add extra code to selection | |
2146 | * in the NCR53c710/NCR53c720 script) to reprogram the synchronous | |
2147 | * conversion bits, or can we be content in just setting the | |
2148 | * sxfer bits? I chose to do so [richard@sleepie.demon.co.uk] | |
2149 | */ | |
2150 | ||
2151 | /* Table for NCR53c8xx synchronous values */ | |
2152 | ||
2153 | /* This table is also correct for 710, allowing that scf=4 is equivalent | |
2154 | * of SSCF=0 (ie use DCNTL, divide by 3) for a 50.01-66.00MHz clock. | |
2155 | * For any other clock values, we cannot use entries with SCF values of | |
2156 | * 4. I guess that for a 66MHz clock, the slowest it will set is 2MHz, | |
2157 | * and for a 50MHz clock, the slowest will be 2.27Mhz. Should check | |
2158 | * that a device doesn't try and negotiate sync below these limits! | |
2159 | */ | |
2160 | ||
2161 | static const struct { | |
2162 | int div; /* Total clock divisor * 10 */ | |
2163 | unsigned char scf; /* */ | |
2164 | unsigned char tp; /* 4 + tp = xferp divisor */ | |
2165 | } syncs[] = { | |
2166 | /* div scf tp div scf tp div scf tp */ | |
2167 | { 40, 1, 0}, { 50, 1, 1}, { 60, 1, 2}, | |
2168 | { 70, 1, 3}, { 75, 2, 1}, { 80, 1, 4}, | |
2169 | { 90, 1, 5}, { 100, 1, 6}, { 105, 2, 3}, | |
2170 | { 110, 1, 7}, { 120, 2, 4}, { 135, 2, 5}, | |
2171 | { 140, 3, 3}, { 150, 2, 6}, { 160, 3, 4}, | |
2172 | { 165, 2, 7}, { 180, 3, 5}, { 200, 3, 6}, | |
2173 | { 210, 4, 3}, { 220, 3, 7}, { 240, 4, 4}, | |
2174 | { 270, 4, 5}, { 300, 4, 6}, { 330, 4, 7} | |
2175 | }; | |
2176 | ||
2177 | /* | |
2178 | * Function : static void synchronous (struct Scsi_Host *host, int target, | |
2179 | * char *msg) | |
2180 | * | |
2181 | * Purpose : reprogram transfers between the selected SCSI initiator and | |
2182 | * target for synchronous SCSI transfers such that the synchronous | |
2183 | * offset is less than that requested and period at least as long | |
2184 | * as that requested. Also modify *msg such that it contains | |
2185 | * an appropriate response. | |
2186 | * | |
2187 | * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, | |
2188 | * msg - synchronous transfer request. | |
2189 | */ | |
2190 | ||
2191 | ||
6391a113 | 2192 | static void |
1da177e4 LT |
2193 | synchronous (struct Scsi_Host *host, int target, char *msg) { |
2194 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
2195 | host->hostdata[0]; | |
2196 | int desire, divisor, i, limit; | |
2197 | unsigned char scntl3, sxfer; | |
2198 | /* The diagnostic message fits on one line, even with max. width integers */ | |
6391a113 TK |
2199 | char buf[80]; |
2200 | ||
1da177e4 LT |
2201 | /* Desired transfer clock in Hz */ |
2202 | desire = 1000000000L / (msg[3] * 4); | |
2203 | /* Scale the available SCSI clock by 10 so we get tenths */ | |
2204 | divisor = (hostdata->scsi_clock * 10) / desire; | |
2205 | ||
2206 | /* NCR chips can handle at most an offset of 8 */ | |
2207 | if (msg[4] > 8) | |
2208 | msg[4] = 8; | |
2209 | ||
2210 | if (hostdata->options & OPTION_DEBUG_SDTR) | |
6391a113 | 2211 | printk("scsi%d : optimal synchronous divisor of %d.%01d\n", |
1da177e4 LT |
2212 | host->host_no, divisor / 10, divisor % 10); |
2213 | ||
6391a113 | 2214 | limit = ARRAY_SIZE(syncs) - 1; |
1da177e4 LT |
2215 | for (i = 0; (i < limit) && (divisor > syncs[i].div); ++i); |
2216 | ||
2217 | if (hostdata->options & OPTION_DEBUG_SDTR) | |
6391a113 | 2218 | printk("scsi%d : selected synchronous divisor of %d.%01d\n", |
1da177e4 LT |
2219 | host->host_no, syncs[i].div / 10, syncs[i].div % 10); |
2220 | ||
2221 | msg[3] = ((1000000000L / hostdata->scsi_clock) * syncs[i].div / 10 / 4); | |
2222 | ||
2223 | if (hostdata->options & OPTION_DEBUG_SDTR) | |
2224 | printk("scsi%d : selected synchronous period of %dns\n", host->host_no, | |
2225 | msg[3] * 4); | |
2226 | ||
2227 | scntl3 = syncs[i].scf; | |
2228 | sxfer = (msg[4] << SXFER_MO_SHIFT) | (syncs[i].tp << 4); | |
2229 | if (hostdata->options & OPTION_DEBUG_SDTR) | |
2230 | printk ("scsi%d : sxfer=0x%x scntl3=0x%x\n", | |
2231 | host->host_no, (int) sxfer, (int) scntl3); | |
2232 | set_synchronous (host, target, sxfer, scntl3, 1); | |
2233 | sprintf (buf, "scsi%d : setting target %d to ", host->host_no, target); | |
2234 | print_synchronous (buf, msg); | |
2235 | } | |
2236 | ||
2237 | /* | |
2238 | * Function : static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, | |
2239 | * struct NCR53c7x0_cmd *cmd) | |
2240 | * | |
2241 | * Purpose : Handler for INT generated instructions for the | |
2242 | * NCR53c810/820 SCSI SCRIPT | |
2243 | * | |
2244 | * Inputs : host - pointer to this host adapter's structure, | |
2245 | * cmd - pointer to the command (if any) dsa was pointing | |
2246 | * to. | |
2247 | * | |
2248 | */ | |
2249 | ||
2250 | static int | |
2251 | NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct | |
2252 | NCR53c7x0_cmd *cmd) { | |
2253 | NCR53c7x0_local_declare(); | |
2254 | int print; | |
2255 | Scsi_Cmnd *c = cmd ? cmd->cmd : NULL; | |
2256 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
2257 | host->hostdata[0]; | |
2258 | u32 dsps,*dsp; /* Argument of the INT instruction */ | |
2259 | ||
2260 | NCR53c7x0_local_setup(host); | |
2261 | dsps = NCR53c7x0_read32(DSPS_REG); | |
2262 | dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG)); | |
2263 | ||
2264 | /* RGH 150597: Frig. Commands which fail with Check Condition are | |
2265 | * Flagged as successful - hack dsps to indicate check condition */ | |
2266 | #if 0 | |
2267 | /* RGH 200597: Need to disable for BVME6000, as it gets Check Conditions | |
2268 | * and then dies. Seems to handle Check Condition at startup, but | |
2269 | * not mid kernel build. */ | |
2270 | if (dsps == A_int_norm_emulateintfly && cmd && cmd->result == 2) | |
2271 | dsps = A_int_err_check_condition; | |
2272 | #endif | |
2273 | ||
2274 | if (hostdata->options & OPTION_DEBUG_INTR) | |
2275 | printk ("scsi%d : DSPS = 0x%x\n", host->host_no, dsps); | |
2276 | ||
2277 | switch (dsps) { | |
2278 | case A_int_msg_1: | |
2279 | print = 1; | |
2280 | switch (hostdata->msg_buf[0]) { | |
2281 | /* | |
2282 | * Unless we've initiated synchronous negotiation, I don't | |
2283 | * think that this should happen. | |
2284 | */ | |
2285 | case MESSAGE_REJECT: | |
2286 | hostdata->dsp = hostdata->script + hostdata->E_accept_message / | |
2287 | sizeof(u32); | |
2288 | hostdata->dsp_changed = 1; | |
2289 | if (cmd && (cmd->flags & CMD_FLAG_SDTR)) { | |
2290 | printk ("scsi%d : target %d rejected SDTR\n", host->host_no, | |
2291 | c->device->id); | |
2292 | cmd->flags &= ~CMD_FLAG_SDTR; | |
2293 | asynchronous (host, c->device->id); | |
2294 | print = 0; | |
2295 | } | |
2296 | break; | |
2297 | case INITIATE_RECOVERY: | |
2298 | printk ("scsi%d : extended contingent allegiance not supported yet, rejecting\n", | |
2299 | host->host_no); | |
2300 | /* Fall through to default */ | |
2301 | hostdata->dsp = hostdata->script + hostdata->E_reject_message / | |
2302 | sizeof(u32); | |
2303 | hostdata->dsp_changed = 1; | |
2304 | break; | |
2305 | default: | |
2306 | printk ("scsi%d : unsupported message, rejecting\n", | |
2307 | host->host_no); | |
2308 | hostdata->dsp = hostdata->script + hostdata->E_reject_message / | |
2309 | sizeof(u32); | |
2310 | hostdata->dsp_changed = 1; | |
2311 | } | |
2312 | if (print) { | |
2313 | printk ("scsi%d : received message", host->host_no); | |
2314 | if (c) | |
2315 | printk (" from target %d lun %d ", c->device->id, c->device->lun); | |
1abfd370 | 2316 | spi_print_msg((unsigned char *) hostdata->msg_buf); |
1da177e4 LT |
2317 | printk("\n"); |
2318 | } | |
2319 | ||
2320 | return SPECIFIC_INT_NOTHING; | |
2321 | ||
2322 | ||
2323 | case A_int_msg_sdtr: | |
2324 | /* | |
2325 | * At this point, hostdata->msg_buf contains | |
2326 | * 0 EXTENDED MESSAGE | |
2327 | * 1 length | |
2328 | * 2 SDTR | |
2329 | * 3 period * 4ns | |
2330 | * 4 offset | |
2331 | */ | |
2332 | ||
2333 | if (cmd) { | |
2334 | char buf[80]; | |
2335 | sprintf (buf, "scsi%d : target %d %s ", host->host_no, c->device->id, | |
2336 | (cmd->flags & CMD_FLAG_SDTR) ? "accepting" : "requesting"); | |
2337 | print_synchronous (buf, (unsigned char *) hostdata->msg_buf); | |
2338 | ||
2339 | /* | |
2340 | * Initiator initiated, won't happen unless synchronous | |
2341 | * transfers are enabled. If we get a SDTR message in | |
2342 | * response to our SDTR, we should program our parameters | |
2343 | * such that | |
2344 | * offset <= requested offset | |
2345 | * period >= requested period | |
2346 | */ | |
2347 | if (cmd->flags & CMD_FLAG_SDTR) { | |
2348 | cmd->flags &= ~CMD_FLAG_SDTR; | |
2349 | if (hostdata->msg_buf[4]) | |
2350 | synchronous (host, c->device->id, (unsigned char *) | |
2351 | hostdata->msg_buf); | |
2352 | else | |
2353 | asynchronous (host, c->device->id); | |
2354 | hostdata->dsp = hostdata->script + hostdata->E_accept_message / | |
2355 | sizeof(u32); | |
2356 | hostdata->dsp_changed = 1; | |
2357 | return SPECIFIC_INT_NOTHING; | |
2358 | } else { | |
2359 | if (hostdata->options & OPTION_SYNCHRONOUS) { | |
2360 | cmd->flags |= CMD_FLAG_DID_SDTR; | |
2361 | synchronous (host, c->device->id, (unsigned char *) | |
2362 | hostdata->msg_buf); | |
2363 | } else { | |
2364 | hostdata->msg_buf[4] = 0; /* 0 offset = async */ | |
2365 | asynchronous (host, c->device->id); | |
2366 | } | |
2367 | patch_dsa_32 (cmd->dsa, dsa_msgout_other, 0, 5); | |
2368 | patch_dsa_32 (cmd->dsa, dsa_msgout_other, 1, (u32) | |
2369 | virt_to_bus ((void *)&hostdata->msg_buf)); | |
2370 | hostdata->dsp = hostdata->script + | |
2371 | hostdata->E_respond_message / sizeof(u32); | |
2372 | hostdata->dsp_changed = 1; | |
2373 | } | |
2374 | return SPECIFIC_INT_NOTHING; | |
2375 | } | |
2376 | /* Fall through to abort if we couldn't find a cmd, and | |
2377 | therefore a dsa structure to twiddle */ | |
2378 | case A_int_msg_wdtr: | |
2379 | hostdata->dsp = hostdata->script + hostdata->E_reject_message / | |
2380 | sizeof(u32); | |
2381 | hostdata->dsp_changed = 1; | |
2382 | return SPECIFIC_INT_NOTHING; | |
2383 | case A_int_err_unexpected_phase: | |
2384 | if (hostdata->options & OPTION_DEBUG_INTR) | |
2385 | printk ("scsi%d : unexpected phase\n", host->host_no); | |
2386 | return SPECIFIC_INT_ABORT; | |
2387 | case A_int_err_selected: | |
2388 | if ((hostdata->chip / 100) == 8) | |
2389 | printk ("scsi%d : selected by target %d\n", host->host_no, | |
2390 | (int) NCR53c7x0_read8(SDID_REG_800) &7); | |
2391 | else | |
2392 | printk ("scsi%d : selected by target LCRC=0x%02x\n", host->host_no, | |
2393 | (int) NCR53c7x0_read8(LCRC_REG_10)); | |
2394 | hostdata->dsp = hostdata->script + hostdata->E_target_abort / | |
2395 | sizeof(u32); | |
2396 | hostdata->dsp_changed = 1; | |
2397 | return SPECIFIC_INT_NOTHING; | |
2398 | case A_int_err_unexpected_reselect: | |
2399 | if ((hostdata->chip / 100) == 8) | |
2400 | printk ("scsi%d : unexpected reselect by target %d lun %d\n", | |
2401 | host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & 7, | |
2402 | hostdata->reselected_identify & 7); | |
2403 | else | |
2404 | printk ("scsi%d : unexpected reselect LCRC=0x%02x\n", host->host_no, | |
2405 | (int) NCR53c7x0_read8(LCRC_REG_10)); | |
2406 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / | |
2407 | sizeof(u32); | |
2408 | hostdata->dsp_changed = 1; | |
2409 | return SPECIFIC_INT_NOTHING; | |
2410 | /* | |
2411 | * Since contingent allegiance conditions are cleared by the next | |
2412 | * command issued to a target, we must issue a REQUEST SENSE | |
2413 | * command after receiving a CHECK CONDITION status, before | |
2414 | * another command is issued. | |
2415 | * | |
2416 | * Since this NCR53c7x0_cmd will be freed after use, we don't | |
2417 | * care if we step on the various fields, so modify a few things. | |
2418 | */ | |
2419 | case A_int_err_check_condition: | |
2420 | #if 0 | |
2421 | if (hostdata->options & OPTION_DEBUG_INTR) | |
2422 | #endif | |
2423 | printk ("scsi%d : CHECK CONDITION\n", host->host_no); | |
2424 | if (!c) { | |
2425 | printk("scsi%d : CHECK CONDITION with no SCSI command\n", | |
2426 | host->host_no); | |
2427 | return SPECIFIC_INT_PANIC; | |
2428 | } | |
2429 | ||
2430 | /* | |
2431 | * FIXME : this uses the normal one-byte selection message. | |
2432 | * We may want to renegotiate for synchronous & WIDE transfers | |
2433 | * since these could be the crux of our problem. | |
2434 | * | |
2435 | hostdata->NOP_insn* FIXME : once SCSI-II tagged queuing is implemented, we'll | |
2436 | * have to set this up so that the rest of the DSA | |
2437 | * agrees with this being an untagged queue'd command. | |
2438 | */ | |
2439 | ||
2440 | patch_dsa_32 (cmd->dsa, dsa_msgout, 0, 1); | |
2441 | ||
2442 | /* | |
2443 | * Modify the table indirect for COMMAND OUT phase, since | |
2444 | * Request Sense is a six byte command. | |
2445 | */ | |
2446 | ||
2447 | patch_dsa_32 (cmd->dsa, dsa_cmdout, 0, 6); | |
2448 | ||
2449 | /* | |
2450 | * The CDB is now mirrored in our local non-cached | |
2451 | * structure, but keep the old structure up to date as well, | |
2452 | * just in case anyone looks at it. | |
2453 | */ | |
2454 | ||
2455 | /* | |
2456 | * XXX Need to worry about data buffer alignment/cache state | |
2457 | * XXX here, but currently never get A_int_err_check_condition, | |
2458 | * XXX so ignore problem for now. | |
2459 | */ | |
2460 | cmd->cmnd[0] = c->cmnd[0] = REQUEST_SENSE; | |
2461 | cmd->cmnd[0] = c->cmnd[1] &= 0xe0; /* Zero all but LUN */ | |
2462 | cmd->cmnd[0] = c->cmnd[2] = 0; | |
2463 | cmd->cmnd[0] = c->cmnd[3] = 0; | |
2464 | cmd->cmnd[0] = c->cmnd[4] = sizeof(c->sense_buffer); | |
2465 | cmd->cmnd[0] = c->cmnd[5] = 0; | |
2466 | ||
2467 | /* | |
2468 | * Disable dataout phase, and program datain to transfer to the | |
2469 | * sense buffer, and add a jump to other_transfer after the | |
2470 | * command so overflow/underrun conditions are detected. | |
2471 | */ | |
2472 | ||
2473 | patch_dsa_32 (cmd->dsa, dsa_dataout, 0, | |
2474 | virt_to_bus(hostdata->script) + hostdata->E_other_transfer); | |
2475 | patch_dsa_32 (cmd->dsa, dsa_datain, 0, | |
2476 | virt_to_bus(cmd->data_transfer_start)); | |
2477 | cmd->data_transfer_start[0] = (((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | | |
2478 | DCMD_BMI_IO)) << 24) | sizeof(c->sense_buffer); | |
2479 | cmd->data_transfer_start[1] = (u32) virt_to_bus(c->sense_buffer); | |
2480 | ||
2481 | cmd->data_transfer_start[2] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) | |
2482 | << 24) | DBC_TCI_TRUE; | |
2483 | cmd->data_transfer_start[3] = (u32) virt_to_bus(hostdata->script) + | |
2484 | hostdata->E_other_transfer; | |
2485 | ||
2486 | /* | |
2487 | * Currently, this command is flagged as completed, ie | |
2488 | * it has valid status and message data. Reflag it as | |
2489 | * incomplete. Q - need to do something so that original | |
2490 | * status, etc are used. | |
2491 | */ | |
2492 | ||
2493 | cmd->result = cmd->cmd->result = 0xffff; | |
2494 | ||
2495 | /* | |
2496 | * Restart command as a REQUEST SENSE. | |
2497 | */ | |
2498 | hostdata->dsp = (u32 *) hostdata->script + hostdata->E_select / | |
2499 | sizeof(u32); | |
2500 | hostdata->dsp_changed = 1; | |
2501 | return SPECIFIC_INT_NOTHING; | |
2502 | case A_int_debug_break: | |
2503 | return SPECIFIC_INT_BREAK; | |
2504 | case A_int_norm_aborted: | |
2505 | hostdata->dsp = (u32 *) hostdata->schedule; | |
2506 | hostdata->dsp_changed = 1; | |
2507 | if (cmd) | |
2508 | abnormal_finished (cmd, DID_ERROR << 16); | |
2509 | return SPECIFIC_INT_NOTHING; | |
2510 | case A_int_norm_emulateintfly: | |
2511 | NCR53c7x0_intfly(host); | |
2512 | return SPECIFIC_INT_NOTHING; | |
2513 | case A_int_test_1: | |
2514 | case A_int_test_2: | |
2515 | hostdata->idle = 1; | |
2516 | hostdata->test_completed = (dsps - A_int_test_1) / 0x00010000 + 1; | |
2517 | if (hostdata->options & OPTION_DEBUG_INTR) | |
2518 | printk("scsi%d : test%d complete\n", host->host_no, | |
2519 | hostdata->test_completed); | |
2520 | return SPECIFIC_INT_NOTHING; | |
2521 | #ifdef A_int_debug_reselected_ok | |
2522 | case A_int_debug_reselected_ok: | |
2523 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2524 | OPTION_DEBUG_DISCONNECT)) { | |
2525 | /* | |
2526 | * Note - this dsa is not based on location relative to | |
2527 | * the command structure, but to location relative to the | |
2528 | * DSA register | |
2529 | */ | |
2530 | u32 *dsa; | |
2531 | dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG)); | |
2532 | ||
2533 | printk("scsi%d : reselected_ok (DSA = 0x%x (virt 0x%p)\n", | |
2534 | host->host_no, NCR53c7x0_read32(DSA_REG), dsa); | |
2535 | printk("scsi%d : resume address is 0x%x (virt 0x%p)\n", | |
2536 | host->host_no, cmd->saved_data_pointer, | |
2537 | bus_to_virt(cmd->saved_data_pointer)); | |
2538 | print_insn (host, hostdata->script + Ent_reselected_ok / | |
2539 | sizeof(u32), "", 1); | |
2540 | if ((hostdata->chip / 100) == 8) | |
2541 | printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n", | |
2542 | host->host_no, NCR53c7x0_read8(SXFER_REG), | |
2543 | NCR53c7x0_read8(SCNTL3_REG_800)); | |
2544 | else | |
2545 | printk ("scsi%d : sxfer=0x%x, cannot read SBCL\n", | |
2546 | host->host_no, NCR53c7x0_read8(SXFER_REG)); | |
2547 | if (c) { | |
2548 | print_insn (host, (u32 *) | |
2549 | hostdata->sync[c->device->id].script, "", 1); | |
2550 | print_insn (host, (u32 *) | |
2551 | hostdata->sync[c->device->id].script + 2, "", 1); | |
2552 | } | |
2553 | } | |
2554 | return SPECIFIC_INT_RESTART; | |
2555 | #endif | |
2556 | #ifdef A_int_debug_reselect_check | |
2557 | case A_int_debug_reselect_check: | |
2558 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2559 | u32 *dsa; | |
2560 | #if 0 | |
2561 | u32 *code; | |
2562 | #endif | |
2563 | /* | |
2564 | * Note - this dsa is not based on location relative to | |
2565 | * the command structure, but to location relative to the | |
2566 | * DSA register | |
2567 | */ | |
2568 | dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG)); | |
2569 | printk("scsi%d : reselected_check_next (DSA = 0x%lx (virt 0x%p))\n", | |
2570 | host->host_no, virt_to_bus(dsa), dsa); | |
2571 | if (dsa) { | |
2572 | printk("scsi%d : resume address is 0x%x (virt 0x%p)\n", | |
2573 | host->host_no, cmd->saved_data_pointer, | |
2574 | bus_to_virt (cmd->saved_data_pointer)); | |
2575 | #if 0 | |
2576 | printk("scsi%d : template code :\n", host->host_no); | |
2577 | for (code = dsa + (Ent_dsa_code_check_reselect - Ent_dsa_zero) | |
2578 | / sizeof(u32); code < (dsa + Ent_dsa_zero / sizeof(u32)); | |
2579 | code += print_insn (host, code, "", 1)); | |
2580 | #endif | |
2581 | } | |
2582 | print_insn (host, hostdata->script + Ent_reselected_ok / | |
2583 | sizeof(u32), "", 1); | |
2584 | } | |
2585 | return SPECIFIC_INT_RESTART; | |
2586 | #endif | |
2587 | #ifdef A_int_debug_dsa_schedule | |
2588 | case A_int_debug_dsa_schedule: | |
2589 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2590 | u32 *dsa; | |
2591 | /* | |
2592 | * Note - this dsa is not based on location relative to | |
2593 | * the command structure, but to location relative to the | |
2594 | * DSA register | |
2595 | */ | |
2596 | dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG)); | |
2597 | printk("scsi%d : dsa_schedule (old DSA = 0x%lx (virt 0x%p))\n", | |
2598 | host->host_no, virt_to_bus(dsa), dsa); | |
2599 | if (dsa) | |
2600 | printk("scsi%d : resume address is 0x%x (virt 0x%p)\n" | |
2601 | " (temp was 0x%x (virt 0x%p))\n", | |
2602 | host->host_no, cmd->saved_data_pointer, | |
2603 | bus_to_virt (cmd->saved_data_pointer), | |
2604 | NCR53c7x0_read32 (TEMP_REG), | |
2605 | bus_to_virt (NCR53c7x0_read32(TEMP_REG))); | |
2606 | } | |
2607 | return SPECIFIC_INT_RESTART; | |
2608 | #endif | |
2609 | #ifdef A_int_debug_scheduled | |
2610 | case A_int_debug_scheduled: | |
2611 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2612 | printk("scsi%d : new I/O 0x%x (virt 0x%p) scheduled\n", | |
2613 | host->host_no, NCR53c7x0_read32(DSA_REG), | |
2614 | bus_to_virt(NCR53c7x0_read32(DSA_REG))); | |
2615 | } | |
2616 | return SPECIFIC_INT_RESTART; | |
2617 | #endif | |
2618 | #ifdef A_int_debug_idle | |
2619 | case A_int_debug_idle: | |
2620 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2621 | printk("scsi%d : idle\n", host->host_no); | |
2622 | } | |
2623 | return SPECIFIC_INT_RESTART; | |
2624 | #endif | |
2625 | #ifdef A_int_debug_cmd | |
2626 | case A_int_debug_cmd: | |
2627 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2628 | printk("scsi%d : command sent\n"); | |
2629 | } | |
2630 | return SPECIFIC_INT_RESTART; | |
2631 | #endif | |
2632 | #ifdef A_int_debug_dsa_loaded | |
2633 | case A_int_debug_dsa_loaded: | |
2634 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2635 | printk("scsi%d : DSA loaded with 0x%x (virt 0x%p)\n", host->host_no, | |
2636 | NCR53c7x0_read32(DSA_REG), | |
2637 | bus_to_virt(NCR53c7x0_read32(DSA_REG))); | |
2638 | } | |
2639 | return SPECIFIC_INT_RESTART; | |
2640 | #endif | |
2641 | #ifdef A_int_debug_reselected | |
2642 | case A_int_debug_reselected: | |
2643 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2644 | OPTION_DEBUG_DISCONNECT)) { | |
2645 | if ((hostdata->chip / 100) == 8) | |
2646 | printk("scsi%d : reselected by target %d lun %d\n", | |
2647 | host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & ~0x80, | |
2648 | (int) hostdata->reselected_identify & 7); | |
2649 | else | |
2650 | printk("scsi%d : reselected by LCRC=0x%02x lun %d\n", | |
2651 | host->host_no, (int) NCR53c7x0_read8(LCRC_REG_10), | |
2652 | (int) hostdata->reselected_identify & 7); | |
2653 | print_queues(host); | |
2654 | } | |
2655 | return SPECIFIC_INT_RESTART; | |
2656 | #endif | |
2657 | #ifdef A_int_debug_disconnect_msg | |
2658 | case A_int_debug_disconnect_msg: | |
2659 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { | |
2660 | if (c) | |
2661 | printk("scsi%d : target %d lun %d disconnecting\n", | |
2662 | host->host_no, c->device->id, c->device->lun); | |
2663 | else | |
2664 | printk("scsi%d : unknown target disconnecting\n", | |
2665 | host->host_no); | |
2666 | } | |
2667 | return SPECIFIC_INT_RESTART; | |
2668 | #endif | |
2669 | #ifdef A_int_debug_disconnected | |
2670 | case A_int_debug_disconnected: | |
2671 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2672 | OPTION_DEBUG_DISCONNECT)) { | |
2673 | printk ("scsi%d : disconnected, new queues are\n", | |
2674 | host->host_no); | |
2675 | print_queues(host); | |
2676 | #if 0 | |
2677 | /* Not valid on ncr53c710! */ | |
2678 | printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n", | |
2679 | host->host_no, NCR53c7x0_read8(SXFER_REG), | |
2680 | NCR53c7x0_read8(SCNTL3_REG_800)); | |
2681 | #endif | |
2682 | if (c) { | |
2683 | print_insn (host, (u32 *) | |
2684 | hostdata->sync[c->device->id].script, "", 1); | |
2685 | print_insn (host, (u32 *) | |
2686 | hostdata->sync[c->device->id].script + 2, "", 1); | |
2687 | } | |
2688 | } | |
2689 | return SPECIFIC_INT_RESTART; | |
2690 | #endif | |
2691 | #ifdef A_int_debug_panic | |
2692 | case A_int_debug_panic: | |
2693 | printk("scsi%d : int_debug_panic received\n", host->host_no); | |
2694 | print_lots (host); | |
2695 | return SPECIFIC_INT_PANIC; | |
2696 | #endif | |
2697 | #ifdef A_int_debug_saved | |
2698 | case A_int_debug_saved: | |
2699 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2700 | OPTION_DEBUG_DISCONNECT)) { | |
2701 | printk ("scsi%d : saved data pointer 0x%x (virt 0x%p)\n", | |
2702 | host->host_no, cmd->saved_data_pointer, | |
2703 | bus_to_virt (cmd->saved_data_pointer)); | |
2704 | print_progress (c); | |
2705 | } | |
2706 | return SPECIFIC_INT_RESTART; | |
2707 | #endif | |
2708 | #ifdef A_int_debug_restored | |
2709 | case A_int_debug_restored: | |
2710 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2711 | OPTION_DEBUG_DISCONNECT)) { | |
2712 | if (cmd) { | |
2713 | int size; | |
2714 | printk ("scsi%d : restored data pointer 0x%x (virt 0x%p)\n", | |
2715 | host->host_no, cmd->saved_data_pointer, bus_to_virt ( | |
2716 | cmd->saved_data_pointer)); | |
2717 | size = print_insn (host, (u32 *) | |
2718 | bus_to_virt(cmd->saved_data_pointer), "", 1); | |
2719 | size = print_insn (host, (u32 *) | |
2720 | bus_to_virt(cmd->saved_data_pointer) + size, "", 1); | |
2721 | print_progress (c); | |
2722 | } | |
2723 | #if 0 | |
2724 | printk ("scsi%d : datapath residual %d\n", | |
2725 | host->host_no, datapath_residual (host)) ; | |
2726 | #endif | |
2727 | } | |
2728 | return SPECIFIC_INT_RESTART; | |
2729 | #endif | |
2730 | #ifdef A_int_debug_sync | |
2731 | case A_int_debug_sync: | |
2732 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2733 | OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) { | |
2734 | unsigned char sxfer = NCR53c7x0_read8 (SXFER_REG), scntl3; | |
2735 | if ((hostdata->chip / 100) == 8) { | |
2736 | scntl3 = NCR53c7x0_read8 (SCNTL3_REG_800); | |
2737 | if (c) { | |
2738 | if (sxfer != hostdata->sync[c->device->id].sxfer_sanity || | |
2739 | scntl3 != hostdata->sync[c->device->id].scntl3_sanity) { | |
2740 | printk ("scsi%d : sync sanity check failed sxfer=0x%x, scntl3=0x%x", | |
2741 | host->host_no, sxfer, scntl3); | |
2742 | NCR53c7x0_write8 (SXFER_REG, sxfer); | |
2743 | NCR53c7x0_write8 (SCNTL3_REG_800, scntl3); | |
2744 | } | |
2745 | } else | |
2746 | printk ("scsi%d : unknown command sxfer=0x%x, scntl3=0x%x\n", | |
2747 | host->host_no, (int) sxfer, (int) scntl3); | |
2748 | } else { | |
2749 | if (c) { | |
2750 | if (sxfer != hostdata->sync[c->device->id].sxfer_sanity) { | |
2751 | printk ("scsi%d : sync sanity check failed sxfer=0x%x", | |
2752 | host->host_no, sxfer); | |
2753 | NCR53c7x0_write8 (SXFER_REG, sxfer); | |
2754 | NCR53c7x0_write8 (SBCL_REG, | |
2755 | hostdata->sync[c->device->id].sscf_710); | |
2756 | } | |
2757 | } else | |
2758 | printk ("scsi%d : unknown command sxfer=0x%x\n", | |
2759 | host->host_no, (int) sxfer); | |
2760 | } | |
2761 | } | |
2762 | return SPECIFIC_INT_RESTART; | |
2763 | #endif | |
2764 | #ifdef A_int_debug_datain | |
2765 | case A_int_debug_datain: | |
2766 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| | |
2767 | OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) { | |
2768 | int size; | |
2769 | if ((hostdata->chip / 100) == 8) | |
2770 | printk ("scsi%d : In do_datain (%s) sxfer=0x%x, scntl3=0x%x\n" | |
2771 | " datapath residual=%d\n", | |
2772 | host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)), | |
2773 | (int) NCR53c7x0_read8(SXFER_REG), | |
2774 | (int) NCR53c7x0_read8(SCNTL3_REG_800), | |
2775 | datapath_residual (host)) ; | |
2776 | else | |
2777 | printk ("scsi%d : In do_datain (%s) sxfer=0x%x\n" | |
2778 | " datapath residual=%d\n", | |
2779 | host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)), | |
2780 | (int) NCR53c7x0_read8(SXFER_REG), | |
2781 | datapath_residual (host)) ; | |
2782 | print_insn (host, dsp, "", 1); | |
2783 | size = print_insn (host, (u32 *) bus_to_virt(dsp[1]), "", 1); | |
2784 | print_insn (host, (u32 *) bus_to_virt(dsp[1]) + size, "", 1); | |
2785 | } | |
2786 | return SPECIFIC_INT_RESTART; | |
2787 | #endif | |
2788 | #ifdef A_int_debug_check_dsa | |
2789 | case A_int_debug_check_dsa: | |
2790 | if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { | |
2791 | int sdid; | |
2792 | int tmp; | |
2793 | char *where; | |
2794 | if (hostdata->chip / 100 == 8) | |
2795 | sdid = NCR53c7x0_read8 (SDID_REG_800) & 15; | |
2796 | else { | |
2797 | tmp = NCR53c7x0_read8 (SDID_REG_700); | |
2798 | if (!tmp) | |
2799 | panic ("SDID_REG_700 = 0"); | |
2800 | tmp >>= 1; | |
2801 | sdid = 0; | |
2802 | while (tmp) { | |
2803 | tmp >>= 1; | |
2804 | sdid++; | |
2805 | } | |
2806 | } | |
2807 | where = dsp - NCR53c7x0_insn_size(NCR53c7x0_read8 | |
2808 | (DCMD_REG)) == hostdata->script + | |
2809 | Ent_select_check_dsa / sizeof(u32) ? | |
2810 | "selection" : "reselection"; | |
2811 | if (c && sdid != c->device->id) { | |
2812 | printk ("scsi%d : SDID target %d != DSA target %d at %s\n", | |
2813 | host->host_no, sdid, c->device->id, where); | |
2814 | print_lots(host); | |
2815 | dump_events (host, 20); | |
2816 | return SPECIFIC_INT_PANIC; | |
2817 | } | |
2818 | } | |
2819 | return SPECIFIC_INT_RESTART; | |
2820 | #endif | |
2821 | default: | |
2822 | if ((dsps & 0xff000000) == 0x03000000) { | |
2823 | printk ("scsi%d : misc debug interrupt 0x%x\n", | |
2824 | host->host_no, dsps); | |
2825 | return SPECIFIC_INT_RESTART; | |
2826 | } else if ((dsps & 0xff000000) == 0x05000000) { | |
2827 | if (hostdata->events) { | |
2828 | struct NCR53c7x0_event *event; | |
2829 | ++hostdata->event_index; | |
2830 | if (hostdata->event_index >= hostdata->event_size) | |
2831 | hostdata->event_index = 0; | |
2832 | event = (struct NCR53c7x0_event *) hostdata->events + | |
2833 | hostdata->event_index; | |
2834 | event->event = (enum ncr_event) dsps; | |
2835 | event->dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); | |
2836 | if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { | |
2837 | if (hostdata->chip / 100 == 8) | |
2838 | event->target = NCR53c7x0_read8(SSID_REG_800); | |
2839 | else { | |
2840 | unsigned char tmp, sdid; | |
2841 | tmp = NCR53c7x0_read8 (SDID_REG_700); | |
2842 | if (!tmp) | |
2843 | panic ("SDID_REG_700 = 0"); | |
2844 | tmp >>= 1; | |
2845 | sdid = 0; | |
2846 | while (tmp) { | |
2847 | tmp >>= 1; | |
2848 | sdid++; | |
2849 | } | |
2850 | event->target = sdid; | |
2851 | } | |
2852 | } | |
2853 | else | |
2854 | event->target = 255; | |
2855 | ||
2856 | if (event->event == EVENT_RESELECT) | |
2857 | event->lun = hostdata->reselected_identify & 0xf; | |
2858 | else if (c) | |
2859 | event->lun = c->device->lun; | |
2860 | else | |
2861 | event->lun = 255; | |
2862 | do_gettimeofday(&(event->time)); | |
2863 | if (c) { | |
2864 | event->pid = c->pid; | |
2865 | memcpy ((void *) event->cmnd, (void *) c->cmnd, | |
2866 | sizeof (event->cmnd)); | |
2867 | } else { | |
2868 | event->pid = -1; | |
2869 | } | |
2870 | } | |
2871 | return SPECIFIC_INT_RESTART; | |
2872 | } | |
2873 | ||
2874 | printk ("scsi%d : unknown user interrupt 0x%x\n", | |
2875 | host->host_no, (unsigned) dsps); | |
2876 | return SPECIFIC_INT_PANIC; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * XXX - the stock NCR assembler won't output the scriptu.h file, | |
2882 | * which undefine's all #define'd CPP symbols from the script.h | |
2883 | * file, which will create problems if you use multiple scripts | |
2884 | * with the same symbol names. | |
2885 | * | |
2886 | * If you insist on using NCR's assembler, you could generate | |
2887 | * scriptu.h from script.h using something like | |
2888 | * | |
2889 | * grep #define script.h | \ | |
2890 | * sed 's/#define[ ][ ]*\([_a-zA-Z][_a-zA-Z0-9]*\).*$/#undefine \1/' \ | |
2891 | * > scriptu.h | |
2892 | */ | |
2893 | ||
2894 | #include "53c7xx_u.h" | |
2895 | ||
2896 | /* XXX - add alternate script handling code here */ | |
2897 | ||
2898 | ||
2899 | /* | |
2900 | * Function : static void NCR537xx_soft_reset (struct Scsi_Host *host) | |
2901 | * | |
2902 | * Purpose : perform a soft reset of the NCR53c7xx chip | |
2903 | * | |
2904 | * Inputs : host - pointer to this host adapter's structure | |
2905 | * | |
2906 | * Preconditions : NCR53c7x0_init must have been called for this | |
2907 | * host. | |
2908 | * | |
2909 | */ | |
2910 | ||
2911 | static void | |
2912 | NCR53c7x0_soft_reset (struct Scsi_Host *host) { | |
2913 | NCR53c7x0_local_declare(); | |
2914 | unsigned long flags; | |
2915 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
2916 | host->hostdata[0]; | |
2917 | NCR53c7x0_local_setup(host); | |
2918 | ||
2919 | local_irq_save(flags); | |
2920 | ||
2921 | /* Disable scsi chip and s/w level 7 ints */ | |
2922 | ||
2923 | #ifdef CONFIG_MVME16x | |
2924 | if (MACH_IS_MVME16x) | |
2925 | { | |
2926 | volatile unsigned long v; | |
2927 | ||
2928 | v = *(volatile unsigned long *)0xfff4006c; | |
2929 | v &= ~0x8000; | |
2930 | *(volatile unsigned long *)0xfff4006c = v; | |
2931 | v = *(volatile unsigned long *)0xfff4202c; | |
2932 | v &= ~0x10; | |
2933 | *(volatile unsigned long *)0xfff4202c = v; | |
2934 | } | |
2935 | #endif | |
2936 | /* Anything specific for your hardware? */ | |
2937 | ||
2938 | /* | |
2939 | * Do a soft reset of the chip so that everything is | |
2940 | * reinitialized to the power-on state. | |
2941 | * | |
2942 | * Basically follow the procedure outlined in the NCR53c700 | |
2943 | * data manual under Chapter Six, How to Use, Steps Necessary to | |
2944 | * Start SCRIPTS, with the exception of actually starting the | |
2945 | * script and setting up the synchronous transfer gunk. | |
2946 | */ | |
2947 | ||
2948 | /* Should we reset the scsi bus here??????????????????? */ | |
2949 | ||
2950 | NCR53c7x0_write8(ISTAT_REG_700, ISTAT_10_SRST); | |
2951 | NCR53c7x0_write8(ISTAT_REG_700, 0); | |
2952 | ||
2953 | /* | |
2954 | * saved_dcntl is set up in NCR53c7x0_init() before it is overwritten | |
2955 | * here. We should have some better way of working out the CF bit | |
2956 | * setting.. | |
2957 | */ | |
2958 | ||
2959 | hostdata->saved_dcntl = DCNTL_10_EA|DCNTL_10_COM; | |
2960 | if (hostdata->scsi_clock > 50000000) | |
2961 | hostdata->saved_dcntl |= DCNTL_700_CF_3; | |
2962 | else | |
2963 | if (hostdata->scsi_clock > 37500000) | |
2964 | hostdata->saved_dcntl |= DCNTL_700_CF_2; | |
2965 | #if 0 | |
2966 | else | |
2967 | /* Any clocks less than 37.5MHz? */ | |
2968 | #endif | |
2969 | ||
2970 | if (hostdata->options & OPTION_DEBUG_TRACE) | |
2971 | NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM); | |
2972 | else | |
2973 | NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl); | |
2974 | /* Following disables snooping - snooping is not required, as non- | |
2975 | * cached pages are used for shared data, and appropriate use is | |
2976 | * made of cache_push/cache_clear. Indeed, for 68060 | |
2977 | * enabling snooping causes disk corruption of ext2fs free block | |
2978 | * bitmaps and the like. If you have a 68060 with snooping hardwared | |
2979 | * on, then you need to enable CONFIG_060_WRITETHROUGH. | |
2980 | */ | |
2981 | NCR53c7x0_write8(CTEST7_REG, CTEST7_10_TT1|CTEST7_STD); | |
2982 | /* Actually burst of eight, according to my 53c710 databook */ | |
2983 | NCR53c7x0_write8(hostdata->dmode, DMODE_10_BL_8 | DMODE_10_FC2); | |
2984 | NCR53c7x0_write8(SCID_REG, 1 << host->this_id); | |
2985 | NCR53c7x0_write8(SBCL_REG, 0); | |
2986 | NCR53c7x0_write8(SCNTL1_REG, SCNTL1_ESR_700); | |
2987 | NCR53c7x0_write8(SCNTL0_REG, ((hostdata->options & OPTION_PARITY) ? | |
2988 | SCNTL0_EPC : 0) | SCNTL0_EPG_700 | SCNTL0_ARB1 | SCNTL0_ARB2); | |
2989 | ||
2990 | /* | |
2991 | * Enable all interrupts, except parity which we only want when | |
2992 | * the user requests it. | |
2993 | */ | |
2994 | ||
2995 | NCR53c7x0_write8(DIEN_REG, DIEN_700_BF | | |
2996 | DIEN_ABRT | DIEN_SSI | DIEN_SIR | DIEN_700_OPC); | |
2997 | ||
2998 | NCR53c7x0_write8(SIEN_REG_700, ((hostdata->options & OPTION_PARITY) ? | |
2999 | SIEN_PAR : 0) | SIEN_700_STO | SIEN_RST | SIEN_UDC | | |
3000 | SIEN_SGE | SIEN_MA); | |
3001 | ||
3002 | #ifdef CONFIG_MVME16x | |
3003 | if (MACH_IS_MVME16x) | |
3004 | { | |
3005 | volatile unsigned long v; | |
3006 | ||
3007 | /* Enable scsi chip and s/w level 7 ints */ | |
3008 | v = *(volatile unsigned long *)0xfff40080; | |
3009 | v = (v & ~(0xf << 28)) | (4 << 28); | |
3010 | *(volatile unsigned long *)0xfff40080 = v; | |
3011 | v = *(volatile unsigned long *)0xfff4006c; | |
3012 | v |= 0x8000; | |
3013 | *(volatile unsigned long *)0xfff4006c = v; | |
3014 | v = *(volatile unsigned long *)0xfff4202c; | |
3015 | v = (v & ~0xff) | 0x10 | 4; | |
3016 | *(volatile unsigned long *)0xfff4202c = v; | |
3017 | } | |
3018 | #endif | |
3019 | /* Anything needed for your hardware? */ | |
3020 | local_irq_restore(flags); | |
3021 | } | |
3022 | ||
3023 | ||
3024 | /* | |
3025 | * Function static struct NCR53c7x0_cmd *allocate_cmd (Scsi_Cmnd *cmd) | |
3026 | * | |
3027 | * Purpose : Return the first free NCR53c7x0_cmd structure (which are | |
3028 | * reused in a LIFO manner to minimize cache thrashing). | |
3029 | * | |
3030 | * Side effects : If we haven't yet scheduled allocation of NCR53c7x0_cmd | |
3031 | * structures for this device, do so. Attempt to complete all scheduled | |
3032 | * allocations using get_zeroed_page(), putting NCR53c7x0_cmd structures on | |
3033 | * the free list. Teach programmers not to drink and hack. | |
3034 | * | |
3035 | * Inputs : cmd - SCSI command | |
3036 | * | |
3037 | * Returns : NCR53c7x0_cmd structure allocated on behalf of cmd; | |
3038 | * NULL on failure. | |
3039 | */ | |
3040 | ||
3041 | static void | |
3042 | my_free_page (void *addr, int dummy) | |
3043 | { | |
3044 | /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which | |
3045 | * XXX may be invalid (CONFIG_060_WRITETHROUGH) | |
3046 | */ | |
3047 | kernel_set_cachemode((void *)addr, 4096, IOMAP_FULL_CACHING); | |
3048 | free_page ((u32)addr); | |
3049 | } | |
3050 | ||
3051 | static struct NCR53c7x0_cmd * | |
3052 | allocate_cmd (Scsi_Cmnd *cmd) { | |
3053 | struct Scsi_Host *host = cmd->device->host; | |
3054 | struct NCR53c7x0_hostdata *hostdata = | |
3055 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
3056 | u32 real; /* Real address */ | |
3057 | int size; /* Size of *tmp */ | |
3058 | struct NCR53c7x0_cmd *tmp; | |
3059 | unsigned long flags; | |
3060 | ||
3061 | if (hostdata->options & OPTION_DEBUG_ALLOCATION) | |
3062 | printk ("scsi%d : num_cmds = %d, can_queue = %d\n" | |
3063 | " target = %d, lun = %d, %s\n", | |
3064 | host->host_no, hostdata->num_cmds, host->can_queue, | |
3065 | cmd->device->id, cmd->device->lun, (hostdata->cmd_allocated[cmd->device->id] & | |
3066 | (1 << cmd->device->lun)) ? "already allocated" : "not allocated"); | |
3067 | ||
3068 | /* | |
3069 | * If we have not yet reserved commands for this I_T_L nexus, and | |
3070 | * the device exists (as indicated by permanent Scsi_Cmnd structures | |
3071 | * being allocated under 1.3.x, or being outside of scan_scsis in | |
3072 | * 1.2.x), do so now. | |
3073 | */ | |
3074 | if (!(hostdata->cmd_allocated[cmd->device->id] & (1 << cmd->device->lun)) && | |
3075 | cmd->device && cmd->device->has_cmdblocks) { | |
3076 | if ((hostdata->extra_allocate + hostdata->num_cmds) < host->can_queue) | |
3077 | hostdata->extra_allocate += host->cmd_per_lun; | |
3078 | hostdata->cmd_allocated[cmd->device->id] |= (1 << cmd->device->lun); | |
3079 | } | |
3080 | ||
3081 | for (; hostdata->extra_allocate > 0 ; --hostdata->extra_allocate, | |
3082 | ++hostdata->num_cmds) { | |
3083 | /* historically, kmalloc has returned unaligned addresses; pad so we | |
3084 | have enough room to ROUNDUP */ | |
3085 | size = hostdata->max_cmd_size + sizeof (void *); | |
3086 | #ifdef FORCE_DSA_ALIGNMENT | |
3087 | /* | |
3088 | * 53c710 rev.0 doesn't have an add-with-carry instruction. | |
3089 | * Ensure we allocate enough memory to force alignment. | |
3090 | */ | |
3091 | size += 256; | |
3092 | #endif | |
3093 | /* FIXME: for ISA bus '7xx chips, we need to or GFP_DMA in here */ | |
3094 | ||
3095 | if (size > 4096) { | |
3096 | printk (KERN_ERR "53c7xx: allocate_cmd size > 4K\n"); | |
3097 | return NULL; | |
3098 | } | |
3099 | real = get_zeroed_page(GFP_ATOMIC); | |
3100 | if (real == 0) | |
3101 | return NULL; | |
3102 | memset((void *)real, 0, 4096); | |
3103 | cache_push(virt_to_phys((void *)real), 4096); | |
3104 | cache_clear(virt_to_phys((void *)real), 4096); | |
3105 | kernel_set_cachemode((void *)real, 4096, IOMAP_NOCACHE_SER); | |
3106 | tmp = ROUNDUP(real, void *); | |
3107 | #ifdef FORCE_DSA_ALIGNMENT | |
3108 | { | |
3109 | if (((u32)tmp & 0xff) > CmdPageStart) | |
3110 | tmp = (struct NCR53c7x0_cmd *)((u32)tmp + 255); | |
3111 | tmp = (struct NCR53c7x0_cmd *)(((u32)tmp & ~0xff) + CmdPageStart); | |
3112 | #if 0 | |
3113 | printk ("scsi: size = %d, real = 0x%08x, tmp set to 0x%08x\n", | |
3114 | size, real, (u32)tmp); | |
3115 | #endif | |
3116 | } | |
3117 | #endif | |
3118 | tmp->real = (void *)real; | |
3119 | tmp->size = size; | |
3120 | tmp->free = ((void (*)(void *, int)) my_free_page); | |
3121 | local_irq_save(flags); | |
3122 | tmp->next = hostdata->free; | |
3123 | hostdata->free = tmp; | |
3124 | local_irq_restore(flags); | |
3125 | } | |
3126 | local_irq_save(flags); | |
3127 | tmp = (struct NCR53c7x0_cmd *) hostdata->free; | |
3128 | if (tmp) { | |
3129 | hostdata->free = tmp->next; | |
3130 | } | |
3131 | local_irq_restore(flags); | |
3132 | if (!tmp) | |
3133 | printk ("scsi%d : can't allocate command for target %d lun %d\n", | |
3134 | host->host_no, cmd->device->id, cmd->device->lun); | |
3135 | return tmp; | |
3136 | } | |
3137 | ||
3138 | /* | |
3139 | * Function static struct NCR53c7x0_cmd *create_cmd (Scsi_Cmnd *cmd) | |
3140 | * | |
3141 | * | |
3142 | * Purpose : allocate a NCR53c7x0_cmd structure, initialize it based on the | |
3143 | * Scsi_Cmnd structure passed in cmd, including dsa and Linux field | |
3144 | * initialization, and dsa code relocation. | |
3145 | * | |
3146 | * Inputs : cmd - SCSI command | |
3147 | * | |
3148 | * Returns : NCR53c7x0_cmd structure corresponding to cmd, | |
3149 | * NULL on failure. | |
3150 | */ | |
3151 | static struct NCR53c7x0_cmd * | |
3152 | create_cmd (Scsi_Cmnd *cmd) { | |
3153 | NCR53c7x0_local_declare(); | |
3154 | struct Scsi_Host *host = cmd->device->host; | |
3155 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
3156 | host->hostdata[0]; | |
3157 | struct NCR53c7x0_cmd *tmp; /* NCR53c7x0_cmd structure for this command */ | |
3158 | int datain, /* Number of instructions per phase */ | |
3159 | dataout; | |
3160 | int data_transfer_instructions, /* Count of dynamic instructions */ | |
3161 | i; /* Counter */ | |
3162 | u32 *cmd_datain, /* Address of datain/dataout code */ | |
3163 | *cmd_dataout; /* Incremented as we assemble */ | |
3164 | #ifdef notyet | |
3165 | unsigned char *msgptr; /* Current byte in select message */ | |
3166 | int msglen; /* Length of whole select message */ | |
3167 | #endif | |
3168 | unsigned long flags; | |
3169 | u32 exp_select_indirect; /* Used in sanity check */ | |
3170 | NCR53c7x0_local_setup(cmd->device->host); | |
3171 | ||
3172 | if (!(tmp = allocate_cmd (cmd))) | |
3173 | return NULL; | |
3174 | ||
3175 | /* | |
3176 | * Copy CDB and initialised result fields from Scsi_Cmnd to NCR53c7x0_cmd. | |
3177 | * We do this because NCR53c7x0_cmd may have a special cache mode | |
3178 | * selected to cope with lack of bus snooping, etc. | |
3179 | */ | |
3180 | ||
3181 | memcpy(tmp->cmnd, cmd->cmnd, 12); | |
3182 | tmp->result = cmd->result; | |
3183 | ||
3184 | /* | |
3185 | * Decide whether we need to generate commands for DATA IN, | |
3186 | * DATA OUT, neither, or both based on the SCSI command | |
3187 | */ | |
3188 | ||
3189 | switch (cmd->cmnd[0]) { | |
3190 | /* These commands do DATA IN */ | |
3191 | case INQUIRY: | |
3192 | case MODE_SENSE: | |
3193 | case READ_6: | |
3194 | case READ_10: | |
3195 | case READ_CAPACITY: | |
3196 | case REQUEST_SENSE: | |
3197 | case READ_BLOCK_LIMITS: | |
3198 | case READ_TOC: | |
3199 | datain = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; | |
3200 | dataout = 0; | |
3201 | break; | |
3202 | /* These commands do DATA OUT */ | |
3203 | case MODE_SELECT: | |
3204 | case WRITE_6: | |
3205 | case WRITE_10: | |
3206 | #if 0 | |
3207 | printk("scsi%d : command is ", host->host_no); | |
db9dff36 | 3208 | __scsi_print_command(cmd->cmnd); |
1da177e4 LT |
3209 | #endif |
3210 | #if 0 | |
3211 | printk ("scsi%d : %d scatter/gather segments\n", host->host_no, | |
3212 | cmd->use_sg); | |
3213 | #endif | |
3214 | datain = 0; | |
3215 | dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; | |
3216 | #if 0 | |
3217 | hostdata->options |= OPTION_DEBUG_INTR; | |
3218 | #endif | |
3219 | break; | |
3220 | /* | |
3221 | * These commands do no data transfer, we should force an | |
3222 | * interrupt if a data phase is attempted on them. | |
3223 | */ | |
3224 | case TEST_UNIT_READY: | |
3225 | case ALLOW_MEDIUM_REMOVAL: | |
3226 | case START_STOP: | |
3227 | datain = dataout = 0; | |
3228 | break; | |
3229 | /* | |
3230 | * We don't know about these commands, so generate code to handle | |
3231 | * both DATA IN and DATA OUT phases. More efficient to identify them | |
3232 | * and add them to the above cases. | |
3233 | */ | |
3234 | default: | |
3235 | printk("scsi%d : datain+dataout for command ", host->host_no); | |
db9dff36 | 3236 | __scsi_print_command(cmd->cmnd); |
1da177e4 LT |
3237 | datain = dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; |
3238 | } | |
3239 | ||
3240 | /* | |
3241 | * New code : so that active pointers work correctly regardless | |
3242 | * of where the saved data pointer is at, we want to immediately | |
3243 | * enter the dynamic code after selection, and on a non-data | |
3244 | * phase perform a CALL to the non-data phase handler, with | |
3245 | * returns back to this address. | |
3246 | * | |
3247 | * If a phase mismatch is encountered in the middle of a | |
3248 | * Block MOVE instruction, we want to _leave_ that instruction | |
3249 | * unchanged as the current case is, modify a temporary buffer, | |
3250 | * and point the active pointer (TEMP) at that. | |
3251 | * | |
3252 | * Furthermore, we want to implement a saved data pointer, | |
3253 | * set by the SAVE_DATA_POINTERs message. | |
3254 | * | |
3255 | * So, the data transfer segments will change to | |
3256 | * CALL data_transfer, WHEN NOT data phase | |
3257 | * MOVE x, x, WHEN data phase | |
3258 | * ( repeat ) | |
3259 | * JUMP other_transfer | |
3260 | */ | |
3261 | ||
3262 | data_transfer_instructions = datain + dataout; | |
3263 | ||
3264 | /* | |
3265 | * When we perform a request sense, we overwrite various things, | |
3266 | * including the data transfer code. Make sure we have enough | |
3267 | * space to do that. | |
3268 | */ | |
3269 | ||
3270 | if (data_transfer_instructions < 2) | |
3271 | data_transfer_instructions = 2; | |
3272 | ||
3273 | ||
3274 | /* | |
3275 | * The saved data pointer is set up so that a RESTORE POINTERS message | |
3276 | * will start the data transfer over at the beginning. | |
3277 | */ | |
3278 | ||
3279 | tmp->saved_data_pointer = virt_to_bus (hostdata->script) + | |
3280 | hostdata->E_data_transfer; | |
3281 | ||
3282 | /* | |
3283 | * Initialize Linux specific fields. | |
3284 | */ | |
3285 | ||
3286 | tmp->cmd = cmd; | |
3287 | tmp->next = NULL; | |
3288 | tmp->flags = 0; | |
3289 | tmp->dsa_next_addr = virt_to_bus(tmp->dsa) + hostdata->dsa_next - | |
3290 | hostdata->dsa_start; | |
3291 | tmp->dsa_addr = virt_to_bus(tmp->dsa) - hostdata->dsa_start; | |
3292 | ||
3293 | /* | |
3294 | * Calculate addresses of dynamic code to fill in DSA | |
3295 | */ | |
3296 | ||
3297 | tmp->data_transfer_start = tmp->dsa + (hostdata->dsa_end - | |
3298 | hostdata->dsa_start) / sizeof(u32); | |
3299 | tmp->data_transfer_end = tmp->data_transfer_start + | |
3300 | 2 * data_transfer_instructions; | |
3301 | ||
3302 | cmd_datain = datain ? tmp->data_transfer_start : NULL; | |
3303 | cmd_dataout = dataout ? (datain ? cmd_datain + 2 * datain : tmp-> | |
3304 | data_transfer_start) : NULL; | |
3305 | ||
3306 | /* | |
3307 | * Fill in the NCR53c7x0_cmd structure as follows | |
3308 | * dsa, with fixed up DSA code | |
3309 | * datain code | |
3310 | * dataout code | |
3311 | */ | |
3312 | ||
3313 | /* Copy template code into dsa and perform all necessary fixups */ | |
3314 | if (hostdata->dsa_fixup) | |
3315 | hostdata->dsa_fixup(tmp); | |
3316 | ||
3317 | patch_dsa_32(tmp->dsa, dsa_next, 0, 0); | |
3318 | /* | |
3319 | * XXX is this giving 53c710 access to the Scsi_Cmnd in some way? | |
3320 | * Do we need to change it for caching reasons? | |
3321 | */ | |
3322 | patch_dsa_32(tmp->dsa, dsa_cmnd, 0, virt_to_bus(cmd)); | |
3323 | ||
3324 | if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) { | |
3325 | ||
3326 | exp_select_indirect = ((1 << cmd->device->id) << 16) | | |
3327 | (hostdata->sync[cmd->device->id].sxfer_sanity << 8); | |
3328 | ||
3329 | if (hostdata->sync[cmd->device->id].select_indirect != | |
3330 | exp_select_indirect) { | |
3331 | printk ("scsi%d : sanity check failed select_indirect=0x%x\n", | |
3332 | host->host_no, hostdata->sync[cmd->device->id].select_indirect); | |
3333 | FATAL(host); | |
3334 | ||
3335 | } | |
3336 | } | |
3337 | ||
3338 | patch_dsa_32(tmp->dsa, dsa_select, 0, | |
3339 | hostdata->sync[cmd->device->id].select_indirect); | |
3340 | ||
3341 | /* | |
3342 | * Right now, we'll do the WIDE and SYNCHRONOUS negotiations on | |
3343 | * different commands; although it should be trivial to do them | |
3344 | * both at the same time. | |
3345 | */ | |
3346 | if (hostdata->initiate_wdtr & (1 << cmd->device->id)) { | |
3347 | memcpy ((void *) (tmp->select + 1), (void *) wdtr_message, | |
3348 | sizeof(wdtr_message)); | |
3349 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(wdtr_message)); | |
3350 | local_irq_save(flags); | |
3351 | hostdata->initiate_wdtr &= ~(1 << cmd->device->id); | |
3352 | local_irq_restore(flags); | |
3353 | } else if (hostdata->initiate_sdtr & (1 << cmd->device->id)) { | |
3354 | memcpy ((void *) (tmp->select + 1), (void *) sdtr_message, | |
3355 | sizeof(sdtr_message)); | |
3356 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(sdtr_message)); | |
3357 | tmp->flags |= CMD_FLAG_SDTR; | |
3358 | local_irq_save(flags); | |
3359 | hostdata->initiate_sdtr &= ~(1 << cmd->device->id); | |
3360 | local_irq_restore(flags); | |
3361 | ||
3362 | } | |
3363 | #if 1 | |
3364 | else if (!(hostdata->talked_to & (1 << cmd->device->id)) && | |
3365 | !(hostdata->options & OPTION_NO_ASYNC)) { | |
3366 | ||
3367 | memcpy ((void *) (tmp->select + 1), (void *) async_message, | |
3368 | sizeof(async_message)); | |
3369 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(async_message)); | |
3370 | tmp->flags |= CMD_FLAG_SDTR; | |
3371 | } | |
3372 | #endif | |
3373 | else | |
3374 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1); | |
3375 | ||
3376 | hostdata->talked_to |= (1 << cmd->device->id); | |
3377 | tmp->select[0] = (hostdata->options & OPTION_DISCONNECT) ? | |
3378 | IDENTIFY (1, cmd->device->lun) : IDENTIFY (0, cmd->device->lun); | |
3379 | patch_dsa_32(tmp->dsa, dsa_msgout, 1, virt_to_bus(tmp->select)); | |
3380 | patch_dsa_32(tmp->dsa, dsa_cmdout, 0, cmd->cmd_len); | |
3381 | patch_dsa_32(tmp->dsa, dsa_cmdout, 1, virt_to_bus(tmp->cmnd)); | |
3382 | patch_dsa_32(tmp->dsa, dsa_dataout, 0, cmd_dataout ? | |
3383 | virt_to_bus (cmd_dataout) | |
3384 | : virt_to_bus (hostdata->script) + hostdata->E_other_transfer); | |
3385 | patch_dsa_32(tmp->dsa, dsa_datain, 0, cmd_datain ? | |
3386 | virt_to_bus (cmd_datain) | |
3387 | : virt_to_bus (hostdata->script) + hostdata->E_other_transfer); | |
3388 | /* | |
3389 | * XXX - need to make endian aware, should use separate variables | |
3390 | * for both status and message bytes. | |
3391 | */ | |
3392 | patch_dsa_32(tmp->dsa, dsa_msgin, 0, 1); | |
3393 | /* | |
3394 | * FIXME : these only works for little endian. We probably want to | |
3395 | * provide message and status fields in the NCR53c7x0_cmd | |
3396 | * structure, and assign them to cmd->result when we're done. | |
3397 | */ | |
3398 | #ifdef BIG_ENDIAN | |
3399 | patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 2); | |
3400 | patch_dsa_32(tmp->dsa, dsa_status, 0, 1); | |
3401 | patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result) + 3); | |
3402 | #else | |
3403 | patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 1); | |
3404 | patch_dsa_32(tmp->dsa, dsa_status, 0, 1); | |
3405 | patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result)); | |
3406 | #endif | |
3407 | patch_dsa_32(tmp->dsa, dsa_msgout_other, 0, 1); | |
3408 | patch_dsa_32(tmp->dsa, dsa_msgout_other, 1, | |
3409 | virt_to_bus(&(hostdata->NCR53c7xx_msg_nop))); | |
3410 | ||
3411 | /* | |
3412 | * Generate code for zero or more of the DATA IN, DATA OUT phases | |
3413 | * in the format | |
3414 | * | |
3415 | * CALL data_transfer, WHEN NOT phase | |
3416 | * MOVE first buffer length, first buffer address, WHEN phase | |
3417 | * ... | |
3418 | * MOVE last buffer length, last buffer address, WHEN phase | |
3419 | * JUMP other_transfer | |
3420 | */ | |
3421 | ||
3422 | /* | |
3423 | * See if we're getting to data transfer by generating an unconditional | |
3424 | * interrupt. | |
3425 | */ | |
3426 | #if 0 | |
3427 | if (datain) { | |
3428 | cmd_datain[0] = 0x98080000; | |
3429 | cmd_datain[1] = 0x03ffd00d; | |
3430 | cmd_datain += 2; | |
3431 | } | |
3432 | #endif | |
3433 | ||
3434 | /* | |
3435 | * XXX - I'm undecided whether all of this nonsense is faster | |
3436 | * in the long run, or whether I should just go and implement a loop | |
3437 | * on the NCR chip using table indirect mode? | |
3438 | * | |
3439 | * In any case, this is how it _must_ be done for 53c700/700-66 chips, | |
3440 | * so this stays even when we come up with something better. | |
3441 | * | |
3442 | * When we're limited to 1 simultaneous command, no overlapping processing, | |
3443 | * we're seeing 630K/sec, with 7% CPU usage on a slow Syquest 45M | |
3444 | * drive. | |
3445 | * | |
3446 | * Not bad, not good. We'll see. | |
3447 | */ | |
3448 | ||
3449 | tmp->bounce.len = 0; /* Assume aligned buffer */ | |
3450 | ||
3451 | for (i = 0; cmd->use_sg ? (i < cmd->use_sg) : !i; cmd_datain += 4, | |
3452 | cmd_dataout += 4, ++i) { | |
3453 | u32 vbuf = cmd->use_sg | |
3454 | ? (u32)page_address(((struct scatterlist *)cmd->buffer)[i].page)+ | |
3455 | ((struct scatterlist *)cmd->buffer)[i].offset | |
3456 | : (u32)(cmd->request_buffer); | |
3457 | u32 bbuf = virt_to_bus((void *)vbuf); | |
3458 | u32 count = cmd->use_sg ? | |
3459 | ((struct scatterlist *)cmd->buffer)[i].length : | |
3460 | cmd->request_bufflen; | |
3461 | ||
3462 | /* | |
3463 | * If we have buffers which are not aligned with 16 byte cache | |
3464 | * lines, then we just hope nothing accesses the other parts of | |
3465 | * those cache lines while the transfer is in progress. That would | |
3466 | * fill the cache, and subsequent reads of the dma data would pick | |
3467 | * up the wrong thing. | |
3468 | * XXX We need a bounce buffer to handle that correctly. | |
3469 | */ | |
3470 | ||
3471 | if (((bbuf & 15) || (count & 15)) && (datain || dataout)) | |
3472 | { | |
3473 | /* Bounce buffer needed */ | |
3474 | if (cmd->use_sg) | |
3475 | printk ("53c7xx: Non-aligned buffer with use_sg\n"); | |
3476 | else if (datain && dataout) | |
3477 | printk ("53c7xx: Non-aligned buffer with datain && dataout\n"); | |
3478 | else if (count > 256) | |
3479 | printk ("53c7xx: Non-aligned transfer > 256 bytes\n"); | |
3480 | else | |
3481 | { | |
3482 | if (datain) | |
3483 | { | |
3484 | tmp->bounce.len = count; | |
3485 | tmp->bounce.addr = vbuf; | |
3486 | bbuf = virt_to_bus(tmp->bounce.buf); | |
3487 | tmp->bounce.buf[0] = 0xff; | |
3488 | tmp->bounce.buf[1] = 0xfe; | |
3489 | tmp->bounce.buf[2] = 0xfd; | |
3490 | tmp->bounce.buf[3] = 0xfc; | |
3491 | } | |
3492 | if (dataout) | |
3493 | { | |
3494 | memcpy ((void *)tmp->bounce.buf, (void *)vbuf, count); | |
3495 | bbuf = virt_to_bus(tmp->bounce.buf); | |
3496 | } | |
3497 | } | |
3498 | } | |
3499 | ||
3500 | if (datain) { | |
3501 | cache_clear(virt_to_phys((void *)vbuf), count); | |
3502 | /* CALL other_in, WHEN NOT DATA_IN */ | |
3503 | cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL | | |
3504 | DCMD_TCI_IO) << 24) | | |
3505 | DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; | |
3506 | cmd_datain[1] = virt_to_bus (hostdata->script) + | |
3507 | hostdata->E_other_in; | |
3508 | /* MOVE count, buf, WHEN DATA_IN */ | |
3509 | cmd_datain[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | DCMD_BMI_IO) | |
3510 | << 24) | count; | |
3511 | cmd_datain[3] = bbuf; | |
3512 | #if 0 | |
3513 | print_insn (host, cmd_datain, "dynamic ", 1); | |
3514 | print_insn (host, cmd_datain + 2, "dynamic ", 1); | |
3515 | #endif | |
3516 | } | |
3517 | if (dataout) { | |
3518 | cache_push(virt_to_phys((void *)vbuf), count); | |
3519 | /* CALL other_out, WHEN NOT DATA_OUT */ | |
3520 | cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL) << 24) | | |
3521 | DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; | |
3522 | cmd_dataout[1] = virt_to_bus(hostdata->script) + | |
3523 | hostdata->E_other_out; | |
3524 | /* MOVE count, buf, WHEN DATA+OUT */ | |
3525 | cmd_dataout[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I) << 24) | |
3526 | | count; | |
3527 | cmd_dataout[3] = bbuf; | |
3528 | #if 0 | |
3529 | print_insn (host, cmd_dataout, "dynamic ", 1); | |
3530 | print_insn (host, cmd_dataout + 2, "dynamic ", 1); | |
3531 | #endif | |
3532 | } | |
3533 | } | |
3534 | ||
3535 | /* | |
3536 | * Install JUMP instructions after the data transfer routines to return | |
3537 | * control to the do_other_transfer routines. | |
3538 | */ | |
3539 | ||
3540 | ||
3541 | if (datain) { | |
3542 | cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) | | |
3543 | DBC_TCI_TRUE; | |
3544 | cmd_datain[1] = virt_to_bus(hostdata->script) + | |
3545 | hostdata->E_other_transfer; | |
3546 | #if 0 | |
3547 | print_insn (host, cmd_datain, "dynamic jump ", 1); | |
3548 | #endif | |
3549 | cmd_datain += 2; | |
3550 | } | |
3551 | #if 0 | |
3552 | if (datain) { | |
3553 | cmd_datain[0] = 0x98080000; | |
3554 | cmd_datain[1] = 0x03ffdeed; | |
3555 | cmd_datain += 2; | |
3556 | } | |
3557 | #endif | |
3558 | if (dataout) { | |
3559 | cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) | | |
3560 | DBC_TCI_TRUE; | |
3561 | cmd_dataout[1] = virt_to_bus(hostdata->script) + | |
3562 | hostdata->E_other_transfer; | |
3563 | #if 0 | |
3564 | print_insn (host, cmd_dataout, "dynamic jump ", 1); | |
3565 | #endif | |
3566 | cmd_dataout += 2; | |
3567 | } | |
3568 | ||
3569 | return tmp; | |
3570 | } | |
3571 | ||
3572 | /* | |
3573 | * Function : int NCR53c7xx_queue_command (Scsi_Cmnd *cmd, | |
3574 | * void (*done)(Scsi_Cmnd *)) | |
3575 | * | |
3576 | * Purpose : enqueues a SCSI command | |
3577 | * | |
3578 | * Inputs : cmd - SCSI command, done - function called on completion, with | |
3579 | * a pointer to the command descriptor. | |
3580 | * | |
3581 | * Returns : 0 | |
3582 | * | |
3583 | * Side effects : | |
3584 | * cmd is added to the per instance driver issue_queue, with major | |
3585 | * twiddling done to the host specific fields of cmd. If the | |
3586 | * process_issue_queue coroutine isn't running, it is restarted. | |
3587 | * | |
3588 | * NOTE : we use the host_scribble field of the Scsi_Cmnd structure to | |
3589 | * hold our own data, and pervert the ptr field of the SCp field | |
3590 | * to create a linked list. | |
3591 | */ | |
3592 | ||
3593 | int | |
3594 | NCR53c7xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *)) { | |
3595 | struct Scsi_Host *host = cmd->device->host; | |
3596 | struct NCR53c7x0_hostdata *hostdata = | |
3597 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
3598 | unsigned long flags; | |
3599 | Scsi_Cmnd *tmp; | |
3600 | ||
3601 | cmd->scsi_done = done; | |
3602 | cmd->host_scribble = NULL; | |
3603 | cmd->SCp.ptr = NULL; | |
3604 | cmd->SCp.buffer = NULL; | |
3605 | ||
3606 | #ifdef VALID_IDS | |
3607 | /* Ignore commands on invalid IDs */ | |
3608 | if (!hostdata->valid_ids[cmd->device->id]) { | |
3609 | printk("scsi%d : ignoring target %d lun %d\n", host->host_no, | |
3610 | cmd->device->id, cmd->device->lun); | |
3611 | cmd->result = (DID_BAD_TARGET << 16); | |
3612 | done(cmd); | |
3613 | return 0; | |
3614 | } | |
3615 | #endif | |
3616 | ||
3617 | local_irq_save(flags); | |
3618 | if ((hostdata->options & (OPTION_DEBUG_INIT_ONLY|OPTION_DEBUG_PROBE_ONLY)) | |
3619 | || ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) && | |
3620 | !(hostdata->debug_lun_limit[cmd->device->id] & (1 << cmd->device->lun))) | |
3621 | #ifdef LINUX_1_2 | |
3622 | || cmd->device->id > 7 | |
3623 | #else | |
2b89dad0 | 3624 | || cmd->device->id >= host->max_id |
1da177e4 LT |
3625 | #endif |
3626 | || cmd->device->id == host->this_id | |
3627 | || hostdata->state == STATE_DISABLED) { | |
3628 | printk("scsi%d : disabled or bad target %d lun %d\n", host->host_no, | |
3629 | cmd->device->id, cmd->device->lun); | |
3630 | cmd->result = (DID_BAD_TARGET << 16); | |
3631 | done(cmd); | |
3632 | local_irq_restore(flags); | |
3633 | return 0; | |
3634 | } | |
3635 | ||
3636 | if ((hostdata->options & OPTION_DEBUG_NCOMMANDS_LIMIT) && | |
3637 | (hostdata->debug_count_limit == 0)) { | |
3638 | printk("scsi%d : maximum commands exceeded\n", host->host_no); | |
3639 | cmd->result = (DID_BAD_TARGET << 16); | |
3640 | done(cmd); | |
3641 | local_irq_restore(flags); | |
3642 | return 0; | |
3643 | } | |
3644 | ||
3645 | if (hostdata->options & OPTION_DEBUG_READ_ONLY) { | |
3646 | switch (cmd->cmnd[0]) { | |
3647 | case WRITE_6: | |
3648 | case WRITE_10: | |
3649 | printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", | |
3650 | host->host_no); | |
3651 | cmd->result = (DID_BAD_TARGET << 16); | |
3652 | done(cmd); | |
3653 | local_irq_restore(flags); | |
3654 | return 0; | |
3655 | } | |
3656 | } | |
3657 | ||
3658 | if ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) && | |
3659 | hostdata->debug_count_limit != -1) | |
3660 | --hostdata->debug_count_limit; | |
3661 | ||
3662 | cmd->result = 0xffff; /* The NCR will overwrite message | |
3663 | and status with valid data */ | |
3664 | cmd->host_scribble = (unsigned char *) tmp = create_cmd (cmd); | |
3665 | ||
3666 | /* | |
3667 | * REQUEST SENSE commands are inserted at the head of the queue | |
3668 | * so that we do not clear the contingent allegiance condition | |
3669 | * they may be looking at. | |
3670 | */ | |
3671 | ||
3672 | if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) { | |
3673 | cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue; | |
3674 | hostdata->issue_queue = cmd; | |
3675 | } else { | |
3676 | for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->SCp.ptr; | |
3677 | tmp = (Scsi_Cmnd *) tmp->SCp.ptr); | |
3678 | tmp->SCp.ptr = (unsigned char *) cmd; | |
3679 | } | |
3680 | local_irq_restore(flags); | |
3681 | run_process_issue_queue(); | |
3682 | return 0; | |
3683 | } | |
3684 | ||
3685 | /* | |
3686 | * Function : void to_schedule_list (struct Scsi_Host *host, | |
3687 | * struct NCR53c7x0_hostdata * hostdata, Scsi_Cmnd *cmd) | |
3688 | * | |
3689 | * Purpose : takes a SCSI command which was just removed from the | |
3690 | * issue queue, and deals with it by inserting it in the first | |
3691 | * free slot in the schedule list or by terminating it immediately. | |
3692 | * | |
3693 | * Inputs : | |
3694 | * host - SCSI host adapter; hostdata - hostdata structure for | |
3695 | * this adapter; cmd - a pointer to the command; should have | |
3696 | * the host_scribble field initialized to point to a valid | |
3697 | * | |
3698 | * Side effects : | |
3699 | * cmd is added to the per instance schedule list, with minor | |
3700 | * twiddling done to the host specific fields of cmd. | |
3701 | * | |
3702 | */ | |
3703 | ||
3704 | static __inline__ void | |
3705 | to_schedule_list (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, | |
3706 | struct NCR53c7x0_cmd *cmd) { | |
3707 | NCR53c7x0_local_declare(); | |
3708 | Scsi_Cmnd *tmp = cmd->cmd; | |
3709 | unsigned long flags; | |
3710 | /* dsa start is negative, so subtraction is used */ | |
3711 | volatile u32 *ncrcurrent; | |
3712 | ||
3713 | int i; | |
3714 | NCR53c7x0_local_setup(host); | |
3715 | #if 0 | |
3716 | printk("scsi%d : new dsa is 0x%lx (virt 0x%p)\n", host->host_no, | |
3717 | virt_to_bus(hostdata->dsa), hostdata->dsa); | |
3718 | #endif | |
3719 | ||
3720 | local_irq_save(flags); | |
3721 | ||
3722 | /* | |
3723 | * Work around race condition : if an interrupt fired and we | |
3724 | * got disabled forget about this command. | |
3725 | */ | |
3726 | ||
3727 | if (hostdata->state == STATE_DISABLED) { | |
3728 | printk("scsi%d : driver disabled\n", host->host_no); | |
3729 | tmp->result = (DID_BAD_TARGET << 16); | |
3730 | cmd->next = (struct NCR53c7x0_cmd *) hostdata->free; | |
3731 | hostdata->free = cmd; | |
3732 | tmp->scsi_done(tmp); | |
3733 | local_irq_restore(flags); | |
3734 | return; | |
3735 | } | |
3736 | ||
3737 | for (i = host->can_queue, ncrcurrent = hostdata->schedule; | |
3738 | i > 0 && ncrcurrent[0] != hostdata->NOP_insn; | |
3739 | --i, ncrcurrent += 2 /* JUMP instructions are two words */); | |
3740 | ||
3741 | if (i > 0) { | |
3742 | ++hostdata->busy[tmp->device->id][tmp->device->lun]; | |
3743 | cmd->next = hostdata->running_list; | |
3744 | hostdata->running_list = cmd; | |
3745 | ||
3746 | /* Restore this instruction to a NOP once the command starts */ | |
3747 | cmd->dsa [(hostdata->dsa_jump_dest - hostdata->dsa_start) / | |
3748 | sizeof(u32)] = (u32) virt_to_bus ((void *)ncrcurrent); | |
3749 | /* Replace the current jump operand. */ | |
3750 | ncrcurrent[1] = | |
3751 | virt_to_bus ((void *) cmd->dsa) + hostdata->E_dsa_code_begin - | |
3752 | hostdata->E_dsa_code_template; | |
3753 | /* Replace the NOP instruction with a JUMP */ | |
3754 | ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | | |
3755 | DBC_TCI_TRUE; | |
3756 | } else { | |
3757 | printk ("scsi%d: no free slot\n", host->host_no); | |
3758 | disable(host); | |
3759 | tmp->result = (DID_ERROR << 16); | |
3760 | cmd->next = (struct NCR53c7x0_cmd *) hostdata->free; | |
3761 | hostdata->free = cmd; | |
3762 | tmp->scsi_done(tmp); | |
3763 | local_irq_restore(flags); | |
3764 | return; | |
3765 | } | |
3766 | ||
3767 | /* | |
3768 | * If the NCR chip is in an idle state, start it running the scheduler | |
3769 | * immediately. Otherwise, signal the chip to jump to schedule as | |
3770 | * soon as it is idle. | |
3771 | */ | |
3772 | ||
3773 | if (hostdata->idle) { | |
3774 | hostdata->idle = 0; | |
3775 | hostdata->state = STATE_RUNNING; | |
3776 | NCR53c7x0_write32 (DSP_REG, virt_to_bus ((void *)hostdata->schedule)); | |
3777 | if (hostdata->options & OPTION_DEBUG_TRACE) | |
3778 | NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | | |
3779 | DCNTL_SSM | DCNTL_STD); | |
3780 | } else { | |
3781 | NCR53c7x0_write8(hostdata->istat, ISTAT_10_SIGP); | |
3782 | } | |
3783 | ||
3784 | local_irq_restore(flags); | |
3785 | } | |
3786 | ||
3787 | /* | |
3788 | * Function : busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata | |
3789 | * *hostdata, Scsi_Cmnd *cmd) | |
3790 | * | |
3791 | * Purpose : decide if we can pass the given SCSI command on to the | |
3792 | * device in question or not. | |
3793 | * | |
3794 | * Returns : non-zero when we're busy, 0 when we aren't. | |
3795 | */ | |
3796 | ||
3797 | static __inline__ int | |
3798 | busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, | |
3799 | Scsi_Cmnd *cmd) { | |
3800 | /* FIXME : in the future, this needs to accommodate SCSI-II tagged | |
3801 | queuing, and we may be able to play with fairness here a bit. | |
3802 | */ | |
3803 | return hostdata->busy[cmd->device->id][cmd->device->lun]; | |
3804 | } | |
3805 | ||
3806 | /* | |
3807 | * Function : process_issue_queue (void) | |
3808 | * | |
3809 | * Purpose : transfer commands from the issue queue to NCR start queue | |
3810 | * of each NCR53c7/8xx in the system, avoiding kernel stack | |
3811 | * overflows when the scsi_done() function is invoked recursively. | |
3812 | * | |
3813 | * NOTE : process_issue_queue exits with interrupts *disabled*, so the | |
3814 | * caller must reenable them if it desires. | |
3815 | * | |
3816 | * NOTE : process_issue_queue should be called from both | |
3817 | * NCR53c7x0_queue_command() and from the interrupt handler | |
3818 | * after command completion in case NCR53c7x0_queue_command() | |
3819 | * isn't invoked again but we've freed up resources that are | |
3820 | * needed. | |
3821 | */ | |
3822 | ||
3823 | static void | |
3824 | process_issue_queue (unsigned long flags) { | |
3825 | Scsi_Cmnd *tmp, *prev; | |
3826 | struct Scsi_Host *host; | |
3827 | struct NCR53c7x0_hostdata *hostdata; | |
3828 | int done; | |
3829 | ||
3830 | /* | |
3831 | * We run (with interrupts disabled) until we're sure that none of | |
3832 | * the host adapters have anything that can be done, at which point | |
3833 | * we set process_issue_queue_running to 0 and exit. | |
3834 | * | |
3835 | * Interrupts are enabled before doing various other internal | |
3836 | * instructions, after we've decided that we need to run through | |
3837 | * the loop again. | |
3838 | * | |
3839 | */ | |
3840 | ||
3841 | do { | |
3842 | local_irq_disable(); /* Freeze request queues */ | |
3843 | done = 1; | |
3844 | for (host = first_host; host && host->hostt == the_template; | |
3845 | host = host->next) { | |
3846 | hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
3847 | local_irq_disable(); | |
3848 | if (hostdata->issue_queue) { | |
3849 | if (hostdata->state == STATE_DISABLED) { | |
3850 | tmp = (Scsi_Cmnd *) hostdata->issue_queue; | |
3851 | hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr; | |
3852 | tmp->result = (DID_BAD_TARGET << 16); | |
3853 | if (tmp->host_scribble) { | |
3854 | ((struct NCR53c7x0_cmd *)tmp->host_scribble)->next = | |
3855 | hostdata->free; | |
3856 | hostdata->free = | |
3857 | (struct NCR53c7x0_cmd *)tmp->host_scribble; | |
3858 | tmp->host_scribble = NULL; | |
3859 | } | |
3860 | tmp->scsi_done (tmp); | |
3861 | done = 0; | |
3862 | } else | |
3863 | for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, | |
3864 | prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) | |
3865 | tmp->SCp.ptr) | |
3866 | if (!tmp->host_scribble || | |
3867 | !busyp (host, hostdata, tmp)) { | |
3868 | if (prev) | |
3869 | prev->SCp.ptr = tmp->SCp.ptr; | |
3870 | else | |
3871 | hostdata->issue_queue = (Scsi_Cmnd *) | |
3872 | tmp->SCp.ptr; | |
3873 | tmp->SCp.ptr = NULL; | |
3874 | if (tmp->host_scribble) { | |
3875 | if (hostdata->options & OPTION_DEBUG_QUEUES) | |
3876 | printk ("scsi%d : moving command for target %d lun %d to start list\n", | |
3877 | host->host_no, tmp->device->id, tmp->device->lun); | |
3878 | ||
3879 | ||
3880 | to_schedule_list (host, hostdata, | |
3881 | (struct NCR53c7x0_cmd *) | |
3882 | tmp->host_scribble); | |
3883 | } else { | |
3884 | if (((tmp->result & 0xff) == 0xff) || | |
3885 | ((tmp->result & 0xff00) == 0xff00)) { | |
3886 | printk ("scsi%d : danger Will Robinson!\n", | |
3887 | host->host_no); | |
3888 | tmp->result = DID_ERROR << 16; | |
3889 | disable (host); | |
3890 | } | |
3891 | tmp->scsi_done(tmp); | |
3892 | } | |
3893 | done = 0; | |
3894 | } /* if target/lun is not busy */ | |
3895 | } /* if hostdata->issue_queue */ | |
3896 | if (!done) | |
3897 | local_irq_restore(flags); | |
3898 | } /* for host */ | |
3899 | } while (!done); | |
3900 | process_issue_queue_running = 0; | |
3901 | } | |
3902 | ||
3903 | /* | |
3904 | * Function : static void intr_scsi (struct Scsi_Host *host, | |
3905 | * struct NCR53c7x0_cmd *cmd) | |
3906 | * | |
3907 | * Purpose : handle all SCSI interrupts, indicated by the setting | |
3908 | * of the SIP bit in the ISTAT register. | |
3909 | * | |
3910 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd | |
3911 | * may be NULL. | |
3912 | */ | |
3913 | ||
3914 | static void | |
3915 | intr_scsi (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { | |
3916 | NCR53c7x0_local_declare(); | |
3917 | struct NCR53c7x0_hostdata *hostdata = | |
3918 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
3919 | unsigned char sstat0_sist0, sist1, /* Registers */ | |
3920 | fatal; /* Did a fatal interrupt | |
3921 | occur ? */ | |
3922 | ||
3923 | NCR53c7x0_local_setup(host); | |
3924 | ||
3925 | fatal = 0; | |
3926 | ||
3927 | sstat0_sist0 = NCR53c7x0_read8(SSTAT0_REG); | |
3928 | sist1 = 0; | |
3929 | ||
3930 | if (hostdata->options & OPTION_DEBUG_INTR) | |
3931 | printk ("scsi%d : SIST0 0x%0x, SIST1 0x%0x\n", host->host_no, | |
3932 | sstat0_sist0, sist1); | |
3933 | ||
3934 | /* 250ms selection timeout */ | |
3935 | if (sstat0_sist0 & SSTAT0_700_STO) { | |
3936 | fatal = 1; | |
3937 | if (hostdata->options & OPTION_DEBUG_INTR) { | |
3938 | printk ("scsi%d : Selection Timeout\n", host->host_no); | |
3939 | if (cmd) { | |
3940 | printk("scsi%d : target %d, lun %d, command ", | |
3941 | host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); | |
db9dff36 | 3942 | __scsi_print_command (cmd->cmd->cmnd); |
1da177e4 LT |
3943 | printk("scsi%d : dsp = 0x%x (virt 0x%p)\n", host->host_no, |
3944 | NCR53c7x0_read32(DSP_REG), | |
3945 | bus_to_virt(NCR53c7x0_read32(DSP_REG))); | |
3946 | } else { | |
3947 | printk("scsi%d : no command\n", host->host_no); | |
3948 | } | |
3949 | } | |
3950 | /* | |
3951 | * XXX - question : how do we want to handle the Illegal Instruction | |
3952 | * interrupt, which may occur before or after the Selection Timeout | |
3953 | * interrupt? | |
3954 | */ | |
3955 | ||
3956 | if (1) { | |
3957 | hostdata->idle = 1; | |
3958 | hostdata->expecting_sto = 0; | |
3959 | ||
3960 | if (hostdata->test_running) { | |
3961 | hostdata->test_running = 0; | |
3962 | hostdata->test_completed = 3; | |
3963 | } else if (cmd) { | |
3964 | abnormal_finished(cmd, DID_BAD_TARGET << 16); | |
3965 | } | |
3966 | #if 0 | |
3967 | hostdata->intrs = 0; | |
3968 | #endif | |
3969 | } | |
3970 | } | |
3971 | ||
3972 | /* | |
3973 | * FIXME : in theory, we can also get a UDC when a STO occurs. | |
3974 | */ | |
3975 | if (sstat0_sist0 & SSTAT0_UDC) { | |
3976 | fatal = 1; | |
3977 | if (cmd) { | |
3978 | printk("scsi%d : target %d lun %d unexpected disconnect\n", | |
3979 | host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); | |
3980 | print_lots (host); | |
3981 | abnormal_finished(cmd, DID_ERROR << 16); | |
3982 | } else | |
3983 | printk("scsi%d : unexpected disconnect (no command)\n", | |
3984 | host->host_no); | |
3985 | ||
3986 | hostdata->dsp = (u32 *) hostdata->schedule; | |
3987 | hostdata->dsp_changed = 1; | |
3988 | } | |
3989 | ||
3990 | /* SCSI PARITY error */ | |
3991 | if (sstat0_sist0 & SSTAT0_PAR) { | |
3992 | fatal = 1; | |
3993 | if (cmd && cmd->cmd) { | |
3994 | printk("scsi%d : target %d lun %d parity error.\n", | |
3995 | host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); | |
3996 | abnormal_finished (cmd, DID_PARITY << 16); | |
3997 | } else | |
3998 | printk("scsi%d : parity error\n", host->host_no); | |
3999 | /* Should send message out, parity error */ | |
4000 | ||
4001 | /* XXX - Reduce synchronous transfer rate! */ | |
4002 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / | |
4003 | sizeof(u32); | |
4004 | hostdata->dsp_changed = 1; | |
4005 | /* SCSI GROSS error */ | |
4006 | } | |
4007 | ||
4008 | if (sstat0_sist0 & SSTAT0_SGE) { | |
4009 | fatal = 1; | |
4010 | printk("scsi%d : gross error, saved2_dsa = 0x%x\n", host->host_no, | |
4011 | (unsigned int)hostdata->saved2_dsa); | |
4012 | print_lots (host); | |
4013 | ||
4014 | /* | |
4015 | * A SCSI gross error may occur when we have | |
4016 | * | |
4017 | * - A synchronous offset which causes the SCSI FIFO to be overwritten. | |
4018 | * | |
4019 | * - A REQ which causes the maximum synchronous offset programmed in | |
4020 | * the SXFER register to be exceeded. | |
4021 | * | |
4022 | * - A phase change with an outstanding synchronous offset. | |
4023 | * | |
4024 | * - Residual data in the synchronous data FIFO, with a transfer | |
4025 | * other than a synchronous receive is started.$# | |
4026 | */ | |
4027 | ||
4028 | ||
4029 | /* XXX Should deduce synchronous transfer rate! */ | |
4030 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / | |
4031 | sizeof(u32); | |
4032 | hostdata->dsp_changed = 1; | |
4033 | /* Phase mismatch */ | |
4034 | } | |
4035 | ||
4036 | if (sstat0_sist0 & SSTAT0_MA) { | |
4037 | fatal = 1; | |
4038 | if (hostdata->options & OPTION_DEBUG_INTR) | |
4039 | printk ("scsi%d : SSTAT0_MA\n", host->host_no); | |
4040 | intr_phase_mismatch (host, cmd); | |
4041 | } | |
4042 | ||
4043 | #if 0 | |
4044 | if (sstat0_sist0 & SIST0_800_RSL) | |
4045 | printk ("scsi%d : Oh no Mr. Bill!\n", host->host_no); | |
4046 | #endif | |
4047 | ||
4048 | /* | |
4049 | * If a fatal SCSI interrupt occurs, we must insure that the DMA and | |
4050 | * SCSI FIFOs were flushed. | |
4051 | */ | |
4052 | ||
4053 | if (fatal) { | |
4054 | if (!hostdata->dstat_valid) { | |
4055 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); | |
4056 | hostdata->dstat_valid = 1; | |
4057 | } | |
4058 | ||
4059 | if (!(hostdata->dstat & DSTAT_DFE)) { | |
4060 | printk ("scsi%d : DMA FIFO not empty\n", host->host_no); | |
4061 | /* | |
4062 | * Really need to check this code for 710 RGH. | |
4063 | * Havn't seen any problems, but maybe we should FLUSH before | |
4064 | * clearing sometimes. | |
4065 | */ | |
4066 | NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); | |
4067 | while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF) | |
4068 | ; | |
4069 | hostdata->dstat |= DSTAT_DFE; | |
4070 | } | |
4071 | } | |
4072 | } | |
4073 | ||
4074 | #ifdef CYCLIC_TRACE | |
4075 | ||
4076 | /* | |
4077 | * The following implements a cyclic log of instructions executed, if you turn | |
4078 | * TRACE on. It will also print the log for you. Very useful when debugging | |
4079 | * 53c710 support, possibly not really needed any more. | |
4080 | */ | |
4081 | ||
4082 | u32 insn_log[4096]; | |
4083 | u32 insn_log_index = 0; | |
4084 | ||
4085 | void log1 (u32 i) | |
4086 | { | |
4087 | insn_log[insn_log_index++] = i; | |
4088 | if (insn_log_index == 4096) | |
4089 | insn_log_index = 0; | |
4090 | } | |
4091 | ||
4092 | void log_insn (u32 *ip) | |
4093 | { | |
4094 | log1 ((u32)ip); | |
4095 | log1 (*ip); | |
4096 | log1 (*(ip+1)); | |
4097 | if (((*ip >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) | |
4098 | log1 (*(ip+2)); | |
4099 | } | |
4100 | ||
4101 | void dump_log(void) | |
4102 | { | |
4103 | int cnt = 0; | |
4104 | int i = insn_log_index; | |
4105 | int size; | |
4106 | struct Scsi_Host *host = first_host; | |
4107 | ||
4108 | while (cnt < 4096) { | |
4109 | printk ("%08x (+%6x): ", insn_log[i], (insn_log[i] - (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4); | |
4110 | if (++i == 4096) | |
4111 | i = 0; | |
4112 | cnt++; | |
4113 | if (((insn_log[i] >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) | |
4114 | size = 3; | |
4115 | else | |
4116 | size = 2; | |
4117 | while (size--) { | |
4118 | printk ("%08x ", insn_log[i]); | |
4119 | if (++i == 4096) | |
4120 | i = 0; | |
4121 | cnt++; | |
4122 | } | |
4123 | printk ("\n"); | |
4124 | } | |
4125 | } | |
4126 | #endif | |
4127 | ||
4128 | ||
4129 | /* | |
4130 | * Function : static void NCR53c7x0_intfly (struct Scsi_Host *host) | |
4131 | * | |
4132 | * Purpose : Scan command queue for specified host, looking for completed | |
4133 | * commands. | |
4134 | * | |
4135 | * Inputs : Scsi_Host pointer. | |
4136 | * | |
4137 | * This is called from the interrupt handler, when a simulated INTFLY | |
4138 | * interrupt occurs. | |
4139 | */ | |
4140 | ||
4141 | static void | |
4142 | NCR53c7x0_intfly (struct Scsi_Host *host) | |
4143 | { | |
4144 | NCR53c7x0_local_declare(); | |
4145 | struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */ | |
4146 | struct NCR53c7x0_cmd *cmd, /* command which halted */ | |
4147 | **cmd_prev_ptr; | |
4148 | unsigned long flags; | |
4149 | char search_found = 0; /* Got at least one ? */ | |
4150 | ||
4151 | hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
4152 | NCR53c7x0_local_setup(host); | |
4153 | ||
4154 | if (hostdata->options & OPTION_DEBUG_INTR) | |
4155 | printk ("scsi%d : INTFLY\n", host->host_no); | |
4156 | ||
4157 | /* | |
4158 | * Traverse our list of running commands, and look | |
4159 | * for those with valid (non-0xff ff) status and message | |
4160 | * bytes encoded in the result which signify command | |
4161 | * completion. | |
4162 | */ | |
4163 | ||
4164 | local_irq_save(flags); | |
4165 | restart: | |
4166 | for (cmd_prev_ptr = (struct NCR53c7x0_cmd **)&(hostdata->running_list), | |
4167 | cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; cmd ; | |
4168 | cmd_prev_ptr = (struct NCR53c7x0_cmd **) &(cmd->next), | |
4169 | cmd = (struct NCR53c7x0_cmd *) cmd->next) | |
4170 | { | |
4171 | Scsi_Cmnd *tmp; | |
4172 | ||
4173 | if (!cmd) { | |
4174 | printk("scsi%d : very weird.\n", host->host_no); | |
4175 | break; | |
4176 | } | |
4177 | ||
4178 | if (!(tmp = cmd->cmd)) { | |
4179 | printk("scsi%d : weird. NCR53c7x0_cmd has no Scsi_Cmnd\n", | |
4180 | host->host_no); | |
4181 | continue; | |
4182 | } | |
4183 | /* Copy the result over now; may not be complete, | |
4184 | * but subsequent tests may as well be done on | |
4185 | * cached memory. | |
4186 | */ | |
4187 | tmp->result = cmd->result; | |
4188 | ||
4189 | if (((tmp->result & 0xff) == 0xff) || | |
4190 | ((tmp->result & 0xff00) == 0xff00)) | |
4191 | continue; | |
4192 | ||
4193 | search_found = 1; | |
4194 | ||
4195 | if (cmd->bounce.len) | |
4196 | memcpy ((void *)cmd->bounce.addr, | |
4197 | (void *)cmd->bounce.buf, cmd->bounce.len); | |
4198 | ||
4199 | /* Important - remove from list _before_ done is called */ | |
4200 | if (cmd_prev_ptr) | |
4201 | *cmd_prev_ptr = (struct NCR53c7x0_cmd *) cmd->next; | |
4202 | ||
4203 | --hostdata->busy[tmp->device->id][tmp->device->lun]; | |
4204 | cmd->next = hostdata->free; | |
4205 | hostdata->free = cmd; | |
4206 | ||
4207 | tmp->host_scribble = NULL; | |
4208 | ||
4209 | if (hostdata->options & OPTION_DEBUG_INTR) { | |
4210 | printk ("scsi%d : command complete : pid %lu, id %d,lun %d result 0x%x ", | |
4211 | host->host_no, tmp->pid, tmp->device->id, tmp->device->lun, tmp->result); | |
db9dff36 | 4212 | __scsi_print_command (tmp->cmnd); |
1da177e4 LT |
4213 | } |
4214 | ||
4215 | tmp->scsi_done(tmp); | |
4216 | goto restart; | |
4217 | } | |
4218 | local_irq_restore(flags); | |
4219 | ||
4220 | if (!search_found) { | |
4221 | printk ("scsi%d : WARNING : INTFLY with no completed commands.\n", | |
4222 | host->host_no); | |
4223 | } else { | |
4224 | run_process_issue_queue(); | |
4225 | } | |
4226 | return; | |
4227 | } | |
4228 | ||
4229 | /* | |
4230 | * Function : static irqreturn_t NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs) | |
4231 | * | |
4232 | * Purpose : handle NCR53c7x0 interrupts for all NCR devices sharing | |
4233 | * the same IRQ line. | |
4234 | * | |
1d6f359a | 4235 | * Inputs : Since we're using the IRQF_DISABLED interrupt handler |
1da177e4 LT |
4236 | * semantics, irq indicates the interrupt which invoked |
4237 | * this handler. | |
4238 | * | |
4239 | * On the 710 we simualte an INTFLY with a script interrupt, and the | |
4240 | * script interrupt handler will call back to this function. | |
4241 | */ | |
4242 | ||
4243 | static irqreturn_t | |
4244 | NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs) | |
4245 | { | |
4246 | NCR53c7x0_local_declare(); | |
4247 | struct Scsi_Host *host; /* Host we are looking at */ | |
4248 | unsigned char istat; /* Values of interrupt regs */ | |
4249 | struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */ | |
4250 | struct NCR53c7x0_cmd *cmd; /* command which halted */ | |
4251 | u32 *dsa; /* DSA */ | |
4252 | int handled = 0; | |
4253 | ||
4254 | #ifdef NCR_DEBUG | |
4255 | char buf[80]; /* Debugging sprintf buffer */ | |
4256 | size_t buflen; /* Length of same */ | |
4257 | #endif | |
4258 | ||
4259 | host = (struct Scsi_Host *)dev_id; | |
4260 | hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
4261 | NCR53c7x0_local_setup(host); | |
4262 | ||
4263 | /* | |
4264 | * Only read istat once per loop, since reading it again will unstack | |
4265 | * interrupts | |
4266 | */ | |
4267 | ||
4268 | while ((istat = NCR53c7x0_read8(hostdata->istat)) & (ISTAT_SIP|ISTAT_DIP)) { | |
4269 | handled = 1; | |
4270 | hostdata->dsp_changed = 0; | |
4271 | hostdata->dstat_valid = 0; | |
4272 | hostdata->state = STATE_HALTED; | |
4273 | ||
4274 | if (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) | |
4275 | printk ("scsi%d : SCSI FIFO not empty\n", host->host_no); | |
4276 | ||
4277 | /* | |
4278 | * NCR53c700 and NCR53c700-66 change the current SCSI | |
4279 | * process, hostdata->ncrcurrent, in the Linux driver so | |
4280 | * cmd = hostdata->ncrcurrent. | |
4281 | * | |
4282 | * With other chips, we must look through the commands | |
4283 | * executing and find the command structure which | |
4284 | * corresponds to the DSA register. | |
4285 | */ | |
4286 | ||
4287 | if (hostdata->options & OPTION_700) { | |
4288 | cmd = (struct NCR53c7x0_cmd *) hostdata->ncrcurrent; | |
4289 | } else { | |
4290 | dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); | |
4291 | for (cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; | |
4292 | cmd && (dsa + (hostdata->dsa_start / sizeof(u32))) != cmd->dsa; | |
4293 | cmd = (struct NCR53c7x0_cmd *)(cmd->next)) | |
4294 | ; | |
4295 | } | |
4296 | if (hostdata->options & OPTION_DEBUG_INTR) { | |
4297 | if (cmd) { | |
4298 | printk("scsi%d : interrupt for pid %lu, id %d, lun %d ", | |
4299 | host->host_no, cmd->cmd->pid, (int) cmd->cmd->device->id, | |
4300 | (int) cmd->cmd->device->lun); | |
db9dff36 | 4301 | __scsi_print_command (cmd->cmd->cmnd); |
1da177e4 LT |
4302 | } else { |
4303 | printk("scsi%d : no active command\n", host->host_no); | |
4304 | } | |
4305 | } | |
4306 | ||
4307 | if (istat & ISTAT_SIP) { | |
4308 | if (hostdata->options & OPTION_DEBUG_INTR) | |
4309 | printk ("scsi%d : ISTAT_SIP\n", host->host_no); | |
4310 | intr_scsi (host, cmd); | |
4311 | } | |
4312 | ||
4313 | if (istat & ISTAT_DIP) { | |
4314 | if (hostdata->options & OPTION_DEBUG_INTR) | |
4315 | printk ("scsi%d : ISTAT_DIP\n", host->host_no); | |
4316 | intr_dma (host, cmd); | |
4317 | } | |
4318 | ||
4319 | if (!hostdata->dstat_valid) { | |
4320 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); | |
4321 | hostdata->dstat_valid = 1; | |
4322 | } | |
4323 | ||
4324 | if (!(hostdata->dstat & DSTAT_DFE)) { | |
4325 | printk ("scsi%d : DMA FIFO not empty\n", host->host_no); | |
4326 | /* Really need to check this out for 710 RGH */ | |
4327 | NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); | |
4328 | while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF) | |
4329 | ; | |
4330 | hostdata->dstat |= DSTAT_DFE; | |
4331 | } | |
4332 | ||
4333 | if (!hostdata->idle && hostdata->state == STATE_HALTED) { | |
4334 | if (!hostdata->dsp_changed) | |
4335 | hostdata->dsp = (u32 *)bus_to_virt(NCR53c7x0_read32(DSP_REG)); | |
4336 | #if 0 | |
4337 | printk("scsi%d : new dsp is 0x%lx (virt 0x%p)\n", | |
4338 | host->host_no, virt_to_bus(hostdata->dsp), hostdata->dsp); | |
4339 | #endif | |
4340 | ||
4341 | hostdata->state = STATE_RUNNING; | |
4342 | NCR53c7x0_write32 (DSP_REG, virt_to_bus(hostdata->dsp)); | |
4343 | if (hostdata->options & OPTION_DEBUG_TRACE) { | |
4344 | #ifdef CYCLIC_TRACE | |
4345 | log_insn (hostdata->dsp); | |
4346 | #else | |
4347 | print_insn (host, hostdata->dsp, "t ", 1); | |
4348 | #endif | |
4349 | NCR53c7x0_write8 (DCNTL_REG, | |
4350 | hostdata->saved_dcntl | DCNTL_SSM | DCNTL_STD); | |
4351 | } | |
4352 | } | |
4353 | } | |
4354 | return IRQ_HANDLED; | |
4355 | } | |
4356 | ||
4357 | ||
4358 | /* | |
4359 | * Function : static int abort_connected (struct Scsi_Host *host) | |
4360 | * | |
4361 | * Purpose : Assuming that the NCR SCSI processor is currently | |
4362 | * halted, break the currently established nexus. Clean | |
4363 | * up of the NCR53c7x0_cmd and Scsi_Cmnd structures should | |
4364 | * be done on receipt of the abort interrupt. | |
4365 | * | |
4366 | * Inputs : host - SCSI host | |
4367 | * | |
4368 | */ | |
4369 | ||
4370 | static int | |
4371 | abort_connected (struct Scsi_Host *host) { | |
4372 | #ifdef NEW_ABORT | |
4373 | NCR53c7x0_local_declare(); | |
4374 | #endif | |
4375 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
4376 | host->hostdata[0]; | |
4377 | /* FIXME : this probably should change for production kernels; at the | |
4378 | least, counter should move to a per-host structure. */ | |
4379 | static int counter = 5; | |
4380 | #ifdef NEW_ABORT | |
4381 | int sstat, phase, offset; | |
4382 | u32 *script; | |
4383 | NCR53c7x0_local_setup(host); | |
4384 | #endif | |
4385 | ||
4386 | if (--counter <= 0) { | |
4387 | disable(host); | |
4388 | return 0; | |
4389 | } | |
4390 | ||
4391 | printk ("scsi%d : DANGER : abort_connected() called \n", | |
4392 | host->host_no); | |
4393 | ||
4394 | #ifdef NEW_ABORT | |
4395 | ||
4396 | /* | |
4397 | * New strategy : Rather than using a generic abort routine, | |
4398 | * we'll specifically try to source or sink the appropriate | |
4399 | * amount of data for the phase we're currently in (taking into | |
4400 | * account the current synchronous offset) | |
4401 | */ | |
4402 | ||
4403 | sstat = (NCR53c8x0_read8 (SSTAT2_REG); | |
4404 | offset = OFFSET (sstat & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT; | |
4405 | phase = sstat & SSTAT2_PHASE_MASK; | |
4406 | ||
4407 | /* | |
4408 | * SET ATN | |
4409 | * MOVE source_or_sink, WHEN CURRENT PHASE | |
4410 | * < repeat for each outstanding byte > | |
4411 | * JUMP send_abort_message | |
4412 | */ | |
4413 | ||
4414 | script = hostdata->abort_script = kmalloc ( | |
4415 | 8 /* instruction size */ * ( | |
4416 | 1 /* set ATN */ + | |
4417 | (!offset ? 1 : offset) /* One transfer per outstanding byte */ + | |
4418 | 1 /* send abort message */), | |
4419 | GFP_ATOMIC); | |
4420 | ||
4421 | ||
4422 | #else /* def NEW_ABORT */ | |
4423 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / | |
4424 | sizeof(u32); | |
4425 | #endif /* def NEW_ABORT */ | |
4426 | hostdata->dsp_changed = 1; | |
4427 | ||
4428 | /* XXX - need to flag the command as aborted after the abort_connected | |
4429 | code runs | |
4430 | */ | |
4431 | return 0; | |
4432 | } | |
4433 | ||
4434 | /* | |
4435 | * Function : static int datapath_residual (Scsi_Host *host) | |
4436 | * | |
4437 | * Purpose : return residual data count of what's in the chip. | |
4438 | * | |
4439 | * Inputs : host - SCSI host | |
4440 | */ | |
4441 | ||
4442 | static int | |
4443 | datapath_residual (struct Scsi_Host *host) { | |
4444 | NCR53c7x0_local_declare(); | |
4445 | int count, synchronous, sstat; | |
4446 | unsigned int ddir; | |
4447 | ||
4448 | NCR53c7x0_local_setup(host); | |
4449 | /* COMPAT : the 700 and 700-66 need to use DFIFO_00_BO_MASK */ | |
4450 | count = ((NCR53c7x0_read8 (DFIFO_REG) & DFIFO_10_BO_MASK) - | |
4451 | (NCR53c7x0_read32 (DBC_REG) & DFIFO_10_BO_MASK)) & DFIFO_10_BO_MASK; | |
4452 | synchronous = NCR53c7x0_read8 (SXFER_REG) & SXFER_MO_MASK; | |
4453 | /* COMPAT : DDIR is elsewhere on non-'8xx chips. */ | |
4454 | ddir = NCR53c7x0_read8 (CTEST0_REG_700) & CTEST0_700_DDIR; | |
4455 | ||
4456 | if (ddir) { | |
4457 | /* Receive */ | |
4458 | if (synchronous) | |
4459 | count += (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT; | |
4460 | else | |
4461 | if (NCR53c7x0_read8 (SSTAT1_REG) & SSTAT1_ILF) | |
4462 | ++count; | |
4463 | } else { | |
4464 | /* Send */ | |
4465 | sstat = NCR53c7x0_read8 (SSTAT1_REG); | |
4466 | if (sstat & SSTAT1_OLF) | |
4467 | ++count; | |
4468 | if (synchronous && (sstat & SSTAT1_ORF)) | |
4469 | ++count; | |
4470 | } | |
4471 | return count; | |
4472 | } | |
4473 | ||
4474 | /* | |
4475 | * Function : static const char * sbcl_to_phase (int sbcl)_ | |
4476 | * | |
4477 | * Purpose : Convert SBCL register to user-parsable phase representation | |
4478 | * | |
4479 | * Inputs : sbcl - value of sbcl register | |
4480 | */ | |
4481 | ||
4482 | ||
4483 | static const char * | |
4484 | sbcl_to_phase (int sbcl) { | |
4485 | switch (sbcl & SBCL_PHASE_MASK) { | |
4486 | case SBCL_PHASE_DATAIN: | |
4487 | return "DATAIN"; | |
4488 | case SBCL_PHASE_DATAOUT: | |
4489 | return "DATAOUT"; | |
4490 | case SBCL_PHASE_MSGIN: | |
4491 | return "MSGIN"; | |
4492 | case SBCL_PHASE_MSGOUT: | |
4493 | return "MSGOUT"; | |
4494 | case SBCL_PHASE_CMDOUT: | |
4495 | return "CMDOUT"; | |
4496 | case SBCL_PHASE_STATIN: | |
4497 | return "STATUSIN"; | |
4498 | default: | |
4499 | return "unknown"; | |
4500 | } | |
4501 | } | |
4502 | ||
4503 | /* | |
4504 | * Function : static const char * sstat2_to_phase (int sstat)_ | |
4505 | * | |
4506 | * Purpose : Convert SSTAT2 register to user-parsable phase representation | |
4507 | * | |
4508 | * Inputs : sstat - value of sstat register | |
4509 | */ | |
4510 | ||
4511 | ||
4512 | static const char * | |
4513 | sstat2_to_phase (int sstat) { | |
4514 | switch (sstat & SSTAT2_PHASE_MASK) { | |
4515 | case SSTAT2_PHASE_DATAIN: | |
4516 | return "DATAIN"; | |
4517 | case SSTAT2_PHASE_DATAOUT: | |
4518 | return "DATAOUT"; | |
4519 | case SSTAT2_PHASE_MSGIN: | |
4520 | return "MSGIN"; | |
4521 | case SSTAT2_PHASE_MSGOUT: | |
4522 | return "MSGOUT"; | |
4523 | case SSTAT2_PHASE_CMDOUT: | |
4524 | return "CMDOUT"; | |
4525 | case SSTAT2_PHASE_STATIN: | |
4526 | return "STATUSIN"; | |
4527 | default: | |
4528 | return "unknown"; | |
4529 | } | |
4530 | } | |
4531 | ||
4532 | /* | |
4533 | * Function : static void intr_phase_mismatch (struct Scsi_Host *host, | |
4534 | * struct NCR53c7x0_cmd *cmd) | |
4535 | * | |
4536 | * Purpose : Handle phase mismatch interrupts | |
4537 | * | |
4538 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd | |
4539 | * may be NULL. | |
4540 | * | |
4541 | * Side effects : The abort_connected() routine is called or the NCR chip | |
4542 | * is restarted, jumping to the command_complete entry point, or | |
4543 | * patching the address and transfer count of the current instruction | |
4544 | * and calling the msg_in entry point as appropriate. | |
4545 | */ | |
4546 | ||
4547 | static void | |
4548 | intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { | |
4549 | NCR53c7x0_local_declare(); | |
4550 | u32 dbc_dcmd, *dsp, *dsp_next; | |
4551 | unsigned char dcmd, sbcl; | |
4552 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
4553 | host->hostdata[0]; | |
4554 | int residual; | |
4555 | enum {ACTION_ABORT, ACTION_ABORT_PRINT, ACTION_CONTINUE} action = | |
4556 | ACTION_ABORT_PRINT; | |
4557 | const char *where = NULL; | |
4558 | ||
4559 | NCR53c7x0_local_setup(host); | |
4560 | ||
4561 | /* | |
4562 | * Corrective action is based on where in the SCSI SCRIPT(tm) the error | |
4563 | * occurred, as well as which SCSI phase we are currently in. | |
4564 | */ | |
4565 | dsp_next = bus_to_virt(NCR53c7x0_read32(DSP_REG)); | |
4566 | ||
4567 | /* | |
4568 | * Fetch the current instruction, and remove the operands for easier | |
4569 | * interpretation. | |
4570 | */ | |
4571 | dbc_dcmd = NCR53c7x0_read32(DBC_REG); | |
4572 | dcmd = (dbc_dcmd & 0xff000000) >> 24; | |
4573 | /* | |
4574 | * Like other processors, the NCR adjusts the instruction pointer before | |
4575 | * instruction decode. Set the DSP address back to what it should | |
4576 | * be for this instruction based on its size (2 or 3 32 bit words). | |
4577 | */ | |
4578 | dsp = dsp_next - NCR53c7x0_insn_size(dcmd); | |
4579 | ||
4580 | ||
4581 | /* | |
4582 | * Read new SCSI phase from the SBCL lines. Since all of our code uses | |
4583 | * a WHEN conditional instead of an IF conditional, we don't need to | |
4584 | * wait for a new REQ. | |
4585 | */ | |
4586 | sbcl = NCR53c7x0_read8(SBCL_REG) & SBCL_PHASE_MASK; | |
4587 | ||
4588 | if (!cmd) { | |
4589 | action = ACTION_ABORT_PRINT; | |
4590 | where = "no current command"; | |
4591 | /* | |
4592 | * The way my SCSI SCRIPTS(tm) are architected, recoverable phase | |
4593 | * mismatches should only occur where we're doing a multi-byte | |
4594 | * BMI instruction. Specifically, this means | |
4595 | * | |
4596 | * - select messages (a SCSI-I target may ignore additional messages | |
4597 | * after the IDENTIFY; any target may reject a SDTR or WDTR) | |
4598 | * | |
4599 | * - command out (targets may send a message to signal an error | |
4600 | * condition, or go into STATUSIN after they've decided | |
4601 | * they don't like the command. | |
4602 | * | |
4603 | * - reply_message (targets may reject a multi-byte message in the | |
4604 | * middle) | |
4605 | * | |
4606 | * - data transfer routines (command completion with buffer space | |
4607 | * left, disconnect message, or error message) | |
4608 | */ | |
4609 | } else if (((dsp >= cmd->data_transfer_start && | |
4610 | dsp < cmd->data_transfer_end)) || dsp == (cmd->residual + 2)) { | |
4611 | if ((dcmd & (DCMD_TYPE_MASK|DCMD_BMI_OP_MASK|DCMD_BMI_INDIRECT| | |
4612 | DCMD_BMI_MSG|DCMD_BMI_CD)) == (DCMD_TYPE_BMI| | |
4613 | DCMD_BMI_OP_MOVE_I)) { | |
4614 | residual = datapath_residual (host); | |
4615 | if (hostdata->options & OPTION_DEBUG_DISCONNECT) | |
4616 | printk ("scsi%d : handling residual transfer (+ %d bytes from DMA FIFO)\n", | |
4617 | host->host_no, residual); | |
4618 | ||
4619 | /* | |
4620 | * The first instruction is a CALL to the alternate handler for | |
4621 | * this data transfer phase, so we can do calls to | |
4622 | * munge_msg_restart as we would if control were passed | |
4623 | * from normal dynamic code. | |
4624 | */ | |
4625 | if (dsp != cmd->residual + 2) { | |
4626 | cmd->residual[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL | | |
4627 | ((dcmd & DCMD_BMI_IO) ? DCMD_TCI_IO : 0)) << 24) | | |
4628 | DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; | |
4629 | cmd->residual[1] = virt_to_bus(hostdata->script) | |
4630 | + ((dcmd & DCMD_BMI_IO) | |
4631 | ? hostdata->E_other_in : hostdata->E_other_out); | |
4632 | } | |
4633 | ||
4634 | /* | |
4635 | * The second instruction is the a data transfer block | |
4636 | * move instruction, reflecting the pointer and count at the | |
4637 | * time of the phase mismatch. | |
4638 | */ | |
4639 | cmd->residual[2] = dbc_dcmd + residual; | |
4640 | cmd->residual[3] = NCR53c7x0_read32(DNAD_REG) - residual; | |
4641 | ||
4642 | /* | |
4643 | * The third and final instruction is a jump to the instruction | |
4644 | * which follows the instruction which had to be 'split' | |
4645 | */ | |
4646 | if (dsp != cmd->residual + 2) { | |
4647 | cmd->residual[4] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) | |
4648 | << 24) | DBC_TCI_TRUE; | |
4649 | cmd->residual[5] = virt_to_bus(dsp_next); | |
4650 | } | |
4651 | ||
4652 | /* | |
4653 | * For the sake of simplicity, transfer control to the | |
4654 | * conditional CALL at the start of the residual buffer. | |
4655 | */ | |
4656 | hostdata->dsp = cmd->residual; | |
4657 | hostdata->dsp_changed = 1; | |
4658 | action = ACTION_CONTINUE; | |
4659 | } else { | |
4660 | where = "non-BMI dynamic DSA code"; | |
4661 | action = ACTION_ABORT_PRINT; | |
4662 | } | |
4663 | } else if (dsp == (hostdata->script + hostdata->E_select_msgout / 4 + 2)) { | |
4664 | /* RGH 290697: Added +2 above, to compensate for the script | |
4665 | * instruction which disables the selection timer. */ | |
4666 | /* Release ATN */ | |
4667 | NCR53c7x0_write8 (SOCL_REG, 0); | |
4668 | switch (sbcl) { | |
4669 | /* | |
4670 | * Some devices (SQ555 come to mind) grab the IDENTIFY message | |
4671 | * sent on selection, and decide to go into COMMAND OUT phase | |
4672 | * rather than accepting the rest of the messages or rejecting | |
4673 | * them. Handle these devices gracefully. | |
4674 | */ | |
4675 | case SBCL_PHASE_CMDOUT: | |
4676 | hostdata->dsp = dsp + 2 /* two _words_ */; | |
4677 | hostdata->dsp_changed = 1; | |
4678 | printk ("scsi%d : target %d ignored SDTR and went into COMMAND OUT\n", | |
4679 | host->host_no, cmd->cmd->device->id); | |
4680 | cmd->flags &= ~CMD_FLAG_SDTR; | |
4681 | action = ACTION_CONTINUE; | |
4682 | break; | |
4683 | case SBCL_PHASE_MSGIN: | |
4684 | hostdata->dsp = hostdata->script + hostdata->E_msg_in / | |
4685 | sizeof(u32); | |
4686 | hostdata->dsp_changed = 1; | |
4687 | action = ACTION_CONTINUE; | |
4688 | break; | |
4689 | default: | |
4690 | where="select message out"; | |
4691 | action = ACTION_ABORT_PRINT; | |
4692 | } | |
4693 | /* | |
4694 | * Some SCSI devices will interpret a command as they read the bytes | |
4695 | * off the SCSI bus, and may decide that the command is Bogus before | |
4696 | * they've read the entire command off the bus. | |
4697 | */ | |
4698 | } else if (dsp == hostdata->script + hostdata->E_cmdout_cmdout / sizeof | |
4699 | (u32)) { | |
4700 | hostdata->dsp = hostdata->script + hostdata->E_data_transfer / | |
4701 | sizeof (u32); | |
4702 | hostdata->dsp_changed = 1; | |
4703 | action = ACTION_CONTINUE; | |
4704 | /* FIXME : we need to handle message reject, etc. within msg_respond. */ | |
4705 | #ifdef notyet | |
4706 | } else if (dsp == hostdata->script + hostdata->E_reply_message) { | |
4707 | switch (sbcl) { | |
4708 | /* Any other phase mismatches abort the currently executing command. */ | |
4709 | #endif | |
4710 | } else { | |
4711 | where = "unknown location"; | |
4712 | action = ACTION_ABORT_PRINT; | |
4713 | } | |
4714 | ||
4715 | /* Flush DMA FIFO */ | |
4716 | if (!hostdata->dstat_valid) { | |
4717 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); | |
4718 | hostdata->dstat_valid = 1; | |
4719 | } | |
4720 | if (!(hostdata->dstat & DSTAT_DFE)) { | |
4721 | /* Really need to check this out for 710 RGH */ | |
4722 | NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); | |
4723 | while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF); | |
4724 | hostdata->dstat |= DSTAT_DFE; | |
4725 | } | |
4726 | ||
4727 | switch (action) { | |
4728 | case ACTION_ABORT_PRINT: | |
4729 | printk("scsi%d : %s : unexpected phase %s.\n", | |
4730 | host->host_no, where ? where : "unknown location", | |
4731 | sbcl_to_phase(sbcl)); | |
4732 | print_lots (host); | |
4733 | /* Fall through to ACTION_ABORT */ | |
4734 | case ACTION_ABORT: | |
4735 | abort_connected (host); | |
4736 | break; | |
4737 | case ACTION_CONTINUE: | |
4738 | break; | |
4739 | } | |
4740 | ||
4741 | #if 0 | |
4742 | if (hostdata->dsp_changed) { | |
4743 | printk("scsi%d: new dsp 0x%p\n", host->host_no, hostdata->dsp); | |
4744 | print_insn (host, hostdata->dsp, "", 1); | |
4745 | } | |
4746 | #endif | |
4747 | } | |
4748 | ||
4749 | /* | |
4750 | * Function : static void intr_bf (struct Scsi_Host *host, | |
4751 | * struct NCR53c7x0_cmd *cmd) | |
4752 | * | |
4753 | * Purpose : handle BUS FAULT interrupts | |
4754 | * | |
4755 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd | |
4756 | * may be NULL. | |
4757 | */ | |
4758 | ||
4759 | static void | |
4760 | intr_bf (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { | |
4761 | NCR53c7x0_local_declare(); | |
4762 | u32 *dsp, | |
4763 | *next_dsp, /* Current dsp */ | |
4764 | *dsa, | |
4765 | dbc_dcmd; /* DCMD (high eight bits) + DBC */ | |
4766 | char *reason = NULL; | |
4767 | /* Default behavior is for a silent error, with a retry until we've | |
4768 | exhausted retries. */ | |
4769 | enum {MAYBE, ALWAYS, NEVER} retry = MAYBE; | |
4770 | int report = 0; | |
4771 | NCR53c7x0_local_setup(host); | |
4772 | ||
4773 | dbc_dcmd = NCR53c7x0_read32 (DBC_REG); | |
4774 | next_dsp = bus_to_virt (NCR53c7x0_read32(DSP_REG)); | |
4775 | dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff); | |
4776 | /* FIXME - check chip type */ | |
4777 | dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG)); | |
4778 | ||
4779 | /* | |
4780 | * Bus faults can be caused by either a Bad Address or | |
4781 | * Target Abort. We should check the Received Target Abort | |
4782 | * bit of the PCI status register and Master Abort Bit. | |
4783 | * | |
4784 | * - Master Abort bit indicates that no device claimed | |
4785 | * the address with DEVSEL within five clocks | |
4786 | * | |
4787 | * - Target Abort bit indicates that a target claimed it, | |
4788 | * but changed its mind once it saw the byte enables. | |
4789 | * | |
4790 | */ | |
4791 | ||
4792 | /* 53c710, not PCI system */ | |
4793 | report = 1; | |
4794 | reason = "Unknown"; | |
4795 | ||
4796 | #ifndef notyet | |
4797 | report = 1; | |
4798 | #endif | |
4799 | if (report && reason) | |
4800 | { | |
4801 | printk(KERN_ALERT "scsi%d : BUS FAULT reason = %s\n", | |
4802 | host->host_no, reason ? reason : "unknown"); | |
4803 | print_lots (host); | |
4804 | } | |
4805 | ||
4806 | #ifndef notyet | |
4807 | retry = NEVER; | |
4808 | #endif | |
4809 | ||
4810 | /* | |
4811 | * TODO : we should attempt to recover from any spurious bus | |
4812 | * faults. After X retries, we should figure that things are | |
4813 | * sufficiently wedged, and call NCR53c7xx_reset. | |
4814 | * | |
4815 | * This code should only get executed once we've decided that we | |
4816 | * cannot retry. | |
4817 | */ | |
4818 | ||
4819 | if (retry == NEVER) { | |
4820 | printk(KERN_ALERT " mail richard@sleepie.demon.co.uk\n"); | |
4821 | FATAL (host); | |
4822 | } | |
4823 | } | |
4824 | ||
4825 | /* | |
4826 | * Function : static void intr_dma (struct Scsi_Host *host, | |
4827 | * struct NCR53c7x0_cmd *cmd) | |
4828 | * | |
4829 | * Purpose : handle all DMA interrupts, indicated by the setting | |
4830 | * of the DIP bit in the ISTAT register. | |
4831 | * | |
4832 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd | |
4833 | * may be NULL. | |
4834 | */ | |
4835 | ||
4836 | static void | |
4837 | intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { | |
4838 | NCR53c7x0_local_declare(); | |
4839 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
4840 | host->hostdata[0]; | |
4841 | unsigned char dstat; /* DSTAT */ | |
4842 | u32 *dsp, | |
4843 | *next_dsp, /* Current dsp */ | |
4844 | *dsa, | |
4845 | dbc_dcmd; /* DCMD (high eight bits) + DBC */ | |
4846 | int tmp; | |
4847 | unsigned long flags; | |
4848 | NCR53c7x0_local_setup(host); | |
4849 | ||
4850 | if (!hostdata->dstat_valid) { | |
4851 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); | |
4852 | hostdata->dstat_valid = 1; | |
4853 | } | |
4854 | ||
4855 | dstat = hostdata->dstat; | |
4856 | ||
4857 | if (hostdata->options & OPTION_DEBUG_INTR) | |
4858 | printk("scsi%d : DSTAT=0x%x\n", host->host_no, (int) dstat); | |
4859 | ||
4860 | dbc_dcmd = NCR53c7x0_read32 (DBC_REG); | |
4861 | next_dsp = bus_to_virt(NCR53c7x0_read32(DSP_REG)); | |
4862 | dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff); | |
4863 | /* XXX - check chip type */ | |
4864 | dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); | |
4865 | ||
4866 | /* | |
4867 | * DSTAT_ABRT is the aborted interrupt. This is set whenever the | |
4868 | * SCSI chip is aborted. | |
4869 | * | |
4870 | * With NCR53c700 and NCR53c700-66 style chips, we should only | |
4871 | * get this when the chip is currently running the accept | |
4872 | * reselect/select code and we have set the abort bit in the | |
4873 | * ISTAT register. | |
4874 | * | |
4875 | */ | |
4876 | ||
4877 | if (dstat & DSTAT_ABRT) { | |
4878 | #if 0 | |
4879 | /* XXX - add code here to deal with normal abort */ | |
4880 | if ((hostdata->options & OPTION_700) && (hostdata->state == | |
4881 | STATE_ABORTING)) { | |
4882 | } else | |
4883 | #endif | |
4884 | { | |
4885 | printk(KERN_ALERT "scsi%d : unexpected abort interrupt at\n" | |
4886 | " ", host->host_no); | |
4887 | print_insn (host, dsp, KERN_ALERT "s ", 1); | |
4888 | FATAL (host); | |
4889 | } | |
4890 | } | |
4891 | ||
4892 | /* | |
4893 | * DSTAT_SSI is the single step interrupt. Should be generated | |
4894 | * whenever we have single stepped or are tracing. | |
4895 | */ | |
4896 | ||
4897 | if (dstat & DSTAT_SSI) { | |
4898 | if (hostdata->options & OPTION_DEBUG_TRACE) { | |
4899 | /* Don't print instr. until we write DSP at end of intr function */ | |
4900 | } else if (hostdata->options & OPTION_DEBUG_SINGLE) { | |
4901 | print_insn (host, dsp, "s ", 0); | |
4902 | local_irq_save(flags); | |
4903 | /* XXX - should we do this, or can we get away with writing dsp? */ | |
4904 | ||
4905 | NCR53c7x0_write8 (DCNTL_REG, (NCR53c7x0_read8(DCNTL_REG) & | |
4906 | ~DCNTL_SSM) | DCNTL_STD); | |
4907 | local_irq_restore(flags); | |
4908 | } else { | |
4909 | printk(KERN_ALERT "scsi%d : unexpected single step interrupt at\n" | |
4910 | " ", host->host_no); | |
4911 | print_insn (host, dsp, KERN_ALERT "", 1); | |
4912 | printk(KERN_ALERT " mail drew@PoohSticks.ORG\n"); | |
4913 | FATAL (host); | |
4914 | } | |
4915 | } | |
4916 | ||
4917 | /* | |
4918 | * DSTAT_IID / DSTAT_OPC (same bit, same meaning, only the name | |
4919 | * is different) is generated whenever an illegal instruction is | |
4920 | * encountered. | |
4921 | * | |
4922 | * XXX - we may want to emulate INTFLY here, so we can use | |
4923 | * the same SCSI SCRIPT (tm) for NCR53c710 through NCR53c810 | |
4924 | * chips. | |
4925 | */ | |
4926 | ||
4927 | if (dstat & DSTAT_OPC) { | |
4928 | /* | |
4929 | * Ascertain if this IID interrupts occurred before or after a STO | |
4930 | * interrupt. Since the interrupt handling code now leaves | |
4931 | * DSP unmodified until _after_ all stacked interrupts have been | |
4932 | * processed, reading the DSP returns the original DSP register. | |
4933 | * This means that if dsp lies between the select code, and | |
4934 | * message out following the selection code (where the IID interrupt | |
4935 | * would have to have occurred by due to the implicit wait for REQ), | |
4936 | * we have an IID interrupt resulting from a STO condition and | |
4937 | * can ignore it. | |
4938 | */ | |
4939 | ||
4940 | if (((dsp >= (hostdata->script + hostdata->E_select / sizeof(u32))) && | |
4941 | (dsp <= (hostdata->script + hostdata->E_select_msgout / | |
4942 | sizeof(u32) + 8))) || (hostdata->test_running == 2)) { | |
4943 | if (hostdata->options & OPTION_DEBUG_INTR) | |
4944 | printk ("scsi%d : ignoring DSTAT_IID for SSTAT_STO\n", | |
4945 | host->host_no); | |
4946 | if (hostdata->expecting_iid) { | |
4947 | hostdata->expecting_iid = 0; | |
4948 | hostdata->idle = 1; | |
4949 | if (hostdata->test_running == 2) { | |
4950 | hostdata->test_running = 0; | |
4951 | hostdata->test_completed = 3; | |
4952 | } else if (cmd) | |
4953 | abnormal_finished (cmd, DID_BAD_TARGET << 16); | |
4954 | } else { | |
4955 | hostdata->expecting_sto = 1; | |
4956 | } | |
4957 | /* | |
4958 | * We can't guarantee we'll be able to execute the WAIT DISCONNECT | |
4959 | * instruction within the 3.4us of bus free and arbitration delay | |
4960 | * that a target can RESELECT in and assert REQ after we've dropped | |
4961 | * ACK. If this happens, we'll get an illegal instruction interrupt. | |
4962 | * Doing away with the WAIT DISCONNECT instructions broke everything, | |
4963 | * so instead I'll settle for moving one WAIT DISCONNECT a few | |
4964 | * instructions closer to the CLEAR ACK before it to minimize the | |
4965 | * chances of this happening, and handle it if it occurs anyway. | |
4966 | * | |
4967 | * Simply continue with what we were doing, and control should | |
4968 | * be transferred to the schedule routine which will ultimately | |
4969 | * pass control onto the reselection or selection (not yet) | |
4970 | * code. | |
4971 | */ | |
4972 | } else if (dbc_dcmd == 0x48000000 && (NCR53c7x0_read8 (SBCL_REG) & | |
4973 | SBCL_REQ)) { | |
4974 | if (!(hostdata->options & OPTION_NO_PRINT_RACE)) | |
4975 | { | |
4976 | printk("scsi%d: REQ before WAIT DISCONNECT IID\n", | |
4977 | host->host_no); | |
4978 | hostdata->options |= OPTION_NO_PRINT_RACE; | |
4979 | } | |
4980 | } else { | |
4981 | printk(KERN_ALERT "scsi%d : invalid instruction\n", host->host_no); | |
4982 | print_lots (host); | |
4983 | printk(KERN_ALERT " mail Richard@sleepie.demon.co.uk with ALL\n" | |
4984 | " boot messages and diagnostic output\n"); | |
4985 | FATAL (host); | |
4986 | } | |
4987 | } | |
4988 | ||
4989 | /* | |
4990 | * DSTAT_BF are bus fault errors. DSTAT_800_BF is valid for 710 also. | |
4991 | */ | |
4992 | ||
4993 | if (dstat & DSTAT_800_BF) { | |
4994 | intr_bf (host, cmd); | |
4995 | } | |
4996 | ||
4997 | ||
4998 | /* | |
4999 | * DSTAT_SIR interrupts are generated by the execution of | |
5000 | * the INT instruction. Since the exact values available | |
5001 | * are determined entirely by the SCSI script running, | |
5002 | * and are local to a particular script, a unique handler | |
5003 | * is called for each script. | |
5004 | */ | |
5005 | ||
5006 | if (dstat & DSTAT_SIR) { | |
5007 | if (hostdata->options & OPTION_DEBUG_INTR) | |
5008 | printk ("scsi%d : DSTAT_SIR\n", host->host_no); | |
5009 | switch ((tmp = hostdata->dstat_sir_intr (host, cmd))) { | |
5010 | case SPECIFIC_INT_NOTHING: | |
5011 | case SPECIFIC_INT_RESTART: | |
5012 | break; | |
5013 | case SPECIFIC_INT_ABORT: | |
5014 | abort_connected(host); | |
5015 | break; | |
5016 | case SPECIFIC_INT_PANIC: | |
5017 | printk(KERN_ALERT "scsi%d : failure at ", host->host_no); | |
5018 | print_insn (host, dsp, KERN_ALERT "", 1); | |
5019 | printk(KERN_ALERT " dstat_sir_intr() returned SPECIFIC_INT_PANIC\n"); | |
5020 | FATAL (host); | |
5021 | break; | |
5022 | case SPECIFIC_INT_BREAK: | |
5023 | intr_break (host, cmd); | |
5024 | break; | |
5025 | default: | |
5026 | printk(KERN_ALERT "scsi%d : failure at ", host->host_no); | |
5027 | print_insn (host, dsp, KERN_ALERT "", 1); | |
5028 | printk(KERN_ALERT" dstat_sir_intr() returned unknown value %d\n", | |
5029 | tmp); | |
5030 | FATAL (host); | |
5031 | } | |
5032 | } | |
5033 | } | |
5034 | ||
5035 | /* | |
5036 | * Function : static int print_insn (struct Scsi_Host *host, | |
5037 | * u32 *insn, int kernel) | |
5038 | * | |
5039 | * Purpose : print numeric representation of the instruction pointed | |
5040 | * to by insn to the debugging or kernel message buffer | |
5041 | * as appropriate. | |
5042 | * | |
5043 | * If desired, a user level program can interpret this | |
5044 | * information. | |
5045 | * | |
5046 | * Inputs : host, insn - host, pointer to instruction, prefix - | |
5047 | * string to prepend, kernel - use printk instead of debugging buffer. | |
5048 | * | |
5049 | * Returns : size, in u32s, of instruction printed. | |
5050 | */ | |
5051 | ||
5052 | /* | |
5053 | * FIXME: should change kernel parameter so that it takes an ENUM | |
5054 | * specifying severity - either KERN_ALERT or KERN_PANIC so | |
5055 | * all panic messages are output with the same severity. | |
5056 | */ | |
5057 | ||
5058 | static int | |
5059 | print_insn (struct Scsi_Host *host, const u32 *insn, | |
5060 | const char *prefix, int kernel) { | |
5061 | char buf[160], /* Temporary buffer and pointer. ICKY | |
5062 | arbitrary length. */ | |
5063 | ||
5064 | ||
5065 | *tmp; | |
5066 | unsigned char dcmd; /* dcmd register for *insn */ | |
5067 | int size; | |
5068 | ||
5069 | /* | |
5070 | * Check to see if the instruction pointer is not bogus before | |
5071 | * indirecting through it; avoiding red-zone at start of | |
5072 | * memory. | |
5073 | * | |
5074 | * FIXME: icky magic needs to happen here on non-intel boxes which | |
5075 | * don't have kernel memory mapped in like this. Might be reasonable | |
5076 | * to use vverify()? | |
5077 | */ | |
5078 | ||
5079 | if (virt_to_phys((void *)insn) < PAGE_SIZE || | |
5080 | virt_to_phys((void *)(insn + 8)) > virt_to_phys(high_memory) || | |
5081 | ((((dcmd = (insn[0] >> 24) & 0xff) & DCMD_TYPE_MMI) == DCMD_TYPE_MMI) && | |
5082 | virt_to_phys((void *)(insn + 12)) > virt_to_phys(high_memory))) { | |
5083 | size = 0; | |
5084 | sprintf (buf, "%s%p: address out of range\n", | |
5085 | prefix, insn); | |
5086 | } else { | |
5087 | /* | |
5088 | * FIXME : (void *) cast in virt_to_bus should be unnecessary, because | |
5089 | * it should take const void * as argument. | |
5090 | */ | |
5091 | #if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000) | |
5092 | sprintf(buf, "%s0x%lx (virt 0x%p) : 0x%08x 0x%08x (virt 0x%p)", | |
5093 | (prefix ? prefix : ""), virt_to_bus((void *) insn), insn, | |
5094 | insn[0], insn[1], bus_to_virt (insn[1])); | |
5095 | #else | |
5096 | /* Remove virtual addresses to reduce output, as they are the same */ | |
5097 | sprintf(buf, "%s0x%x (+%x) : 0x%08x 0x%08x", | |
5098 | (prefix ? prefix : ""), (u32)insn, ((u32)insn - | |
5099 | (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4, | |
5100 | insn[0], insn[1]); | |
5101 | #endif | |
5102 | tmp = buf + strlen(buf); | |
5103 | if ((dcmd & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) { | |
5104 | #if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000) | |
5105 | sprintf (tmp, " 0x%08x (virt 0x%p)\n", insn[2], | |
5106 | bus_to_virt(insn[2])); | |
5107 | #else | |
5108 | /* Remove virtual addr to reduce output, as it is the same */ | |
5109 | sprintf (tmp, " 0x%08x\n", insn[2]); | |
5110 | #endif | |
5111 | size = 3; | |
5112 | } else { | |
5113 | sprintf (tmp, "\n"); | |
5114 | size = 2; | |
5115 | } | |
5116 | } | |
5117 | ||
5118 | if (kernel) | |
5119 | printk ("%s", buf); | |
5120 | #ifdef NCR_DEBUG | |
5121 | else { | |
5122 | size_t len = strlen(buf); | |
5123 | debugger_kernel_write(host, buf, len); | |
5124 | } | |
5125 | #endif | |
5126 | return size; | |
5127 | } | |
5128 | ||
5129 | /* | |
5130 | * Function : int NCR53c7xx_abort (Scsi_Cmnd *cmd) | |
5131 | * | |
5132 | * Purpose : Abort an errant SCSI command, doing all necessary | |
5133 | * cleanup of the issue_queue, running_list, shared Linux/NCR | |
5134 | * dsa issue and reconnect queues. | |
5135 | * | |
5136 | * Inputs : cmd - command to abort, code - entire result field | |
5137 | * | |
5138 | * Returns : 0 on success, -1 on failure. | |
5139 | */ | |
5140 | ||
5141 | int | |
5142 | NCR53c7xx_abort (Scsi_Cmnd *cmd) { | |
5143 | NCR53c7x0_local_declare(); | |
5144 | struct Scsi_Host *host = cmd->device->host; | |
5145 | struct NCR53c7x0_hostdata *hostdata = host ? (struct NCR53c7x0_hostdata *) | |
5146 | host->hostdata[0] : NULL; | |
5147 | unsigned long flags; | |
5148 | struct NCR53c7x0_cmd *curr, **prev; | |
5149 | Scsi_Cmnd *me, **last; | |
5150 | #if 0 | |
5151 | static long cache_pid = -1; | |
5152 | #endif | |
5153 | ||
5154 | ||
5155 | if (!host) { | |
5156 | printk ("Bogus SCSI command pid %ld; no host structure\n", | |
5157 | cmd->pid); | |
5158 | return SCSI_ABORT_ERROR; | |
5159 | } else if (!hostdata) { | |
5160 | printk ("Bogus SCSI host %d; no hostdata\n", host->host_no); | |
5161 | return SCSI_ABORT_ERROR; | |
5162 | } | |
5163 | NCR53c7x0_local_setup(host); | |
5164 | ||
5165 | /* | |
5166 | * CHECK : I don't think that reading ISTAT will unstack any interrupts, | |
5167 | * since we need to write the INTF bit to clear it, and SCSI/DMA | |
5168 | * interrupts don't clear until we read SSTAT/SIST and DSTAT registers. | |
5169 | * | |
5170 | * See that this is the case. Appears to be correct on the 710, at least. | |
5171 | * | |
5172 | * I suspect that several of our failures may be coming from a new fatal | |
5173 | * interrupt (possibly due to a phase mismatch) happening after we've left | |
5174 | * the interrupt handler, but before the PIC has had the interrupt condition | |
5175 | * cleared. | |
5176 | */ | |
5177 | ||
5178 | if (NCR53c7x0_read8(hostdata->istat) & (ISTAT_DIP|ISTAT_SIP)) { | |
5179 | printk ("scsi%d : dropped interrupt for command %ld\n", host->host_no, | |
5180 | cmd->pid); | |
5181 | NCR53c7x0_intr (host->irq, NULL, NULL); | |
5182 | return SCSI_ABORT_BUSY; | |
5183 | } | |
5184 | ||
5185 | local_irq_save(flags); | |
5186 | #if 0 | |
5187 | if (cache_pid == cmd->pid) | |
5188 | panic ("scsi%d : bloody fetus %d\n", host->host_no, cmd->pid); | |
5189 | else | |
5190 | cache_pid = cmd->pid; | |
5191 | #endif | |
5192 | ||
5193 | ||
5194 | /* | |
5195 | * The command could be hiding in the issue_queue. This would be very | |
5196 | * nice, as commands can't be moved from the high level driver's issue queue | |
5197 | * into the shared queue until an interrupt routine is serviced, and this | |
5198 | * moving is atomic. | |
5199 | * | |
5200 | * If this is the case, we don't have to worry about anything - we simply | |
5201 | * pull the command out of the old queue, and call it aborted. | |
5202 | */ | |
5203 | ||
5204 | for (me = (Scsi_Cmnd *) hostdata->issue_queue, | |
5205 | last = (Scsi_Cmnd **) &(hostdata->issue_queue); | |
5206 | me && me != cmd; last = (Scsi_Cmnd **)&(me->SCp.ptr), | |
5207 | me = (Scsi_Cmnd *)me->SCp.ptr); | |
5208 | ||
5209 | if (me) { | |
5210 | *last = (Scsi_Cmnd *) me->SCp.ptr; | |
5211 | if (me->host_scribble) { | |
5212 | ((struct NCR53c7x0_cmd *)me->host_scribble)->next = hostdata->free; | |
5213 | hostdata->free = (struct NCR53c7x0_cmd *) me->host_scribble; | |
5214 | me->host_scribble = NULL; | |
5215 | } | |
5216 | cmd->result = DID_ABORT << 16; | |
5217 | cmd->scsi_done(cmd); | |
5218 | printk ("scsi%d : found command %ld in Linux issue queue\n", | |
5219 | host->host_no, me->pid); | |
5220 | local_irq_restore(flags); | |
5221 | run_process_issue_queue(); | |
5222 | return SCSI_ABORT_SUCCESS; | |
5223 | } | |
5224 | ||
5225 | /* | |
5226 | * That failing, the command could be in our list of already executing | |
5227 | * commands. If this is the case, drastic measures are called for. | |
5228 | */ | |
5229 | ||
5230 | for (curr = (struct NCR53c7x0_cmd *) hostdata->running_list, | |
5231 | prev = (struct NCR53c7x0_cmd **) &(hostdata->running_list); | |
5232 | curr && curr->cmd != cmd; prev = (struct NCR53c7x0_cmd **) | |
5233 | &(curr->next), curr = (struct NCR53c7x0_cmd *) curr->next); | |
5234 | ||
5235 | if (curr) { | |
5236 | if ((curr->result & 0xff) != 0xff && (curr->result & 0xff00) != 0xff00) { | |
5237 | cmd->result = curr->result; | |
5238 | if (prev) | |
5239 | *prev = (struct NCR53c7x0_cmd *) curr->next; | |
5240 | curr->next = (struct NCR53c7x0_cmd *) hostdata->free; | |
5241 | cmd->host_scribble = NULL; | |
5242 | hostdata->free = curr; | |
5243 | cmd->scsi_done(cmd); | |
5244 | printk ("scsi%d : found finished command %ld in running list\n", | |
5245 | host->host_no, cmd->pid); | |
5246 | local_irq_restore(flags); | |
5247 | return SCSI_ABORT_NOT_RUNNING; | |
5248 | } else { | |
5249 | printk ("scsi%d : DANGER : command running, can not abort.\n", | |
5250 | cmd->device->host->host_no); | |
5251 | local_irq_restore(flags); | |
5252 | return SCSI_ABORT_BUSY; | |
5253 | } | |
5254 | } | |
5255 | ||
5256 | /* | |
5257 | * And if we couldn't find it in any of our queues, it must have been | |
5258 | * a dropped interrupt. | |
5259 | */ | |
5260 | ||
5261 | curr = (struct NCR53c7x0_cmd *) cmd->host_scribble; | |
5262 | if (curr) { | |
5263 | curr->next = hostdata->free; | |
5264 | hostdata->free = curr; | |
5265 | cmd->host_scribble = NULL; | |
5266 | } | |
5267 | ||
5268 | if (curr == NULL || ((curr->result & 0xff00) == 0xff00) || | |
5269 | ((curr->result & 0xff) == 0xff)) { | |
5270 | printk ("scsi%d : did this command ever run?\n", host->host_no); | |
5271 | cmd->result = DID_ABORT << 16; | |
5272 | } else { | |
5273 | printk ("scsi%d : probably lost INTFLY, normal completion\n", | |
5274 | host->host_no); | |
5275 | cmd->result = curr->result; | |
5276 | /* | |
5277 | * FIXME : We need to add an additional flag which indicates if a | |
5278 | * command was ever counted as BUSY, so if we end up here we can | |
5279 | * decrement the busy count if and only if it is necessary. | |
5280 | */ | |
5281 | --hostdata->busy[cmd->device->id][cmd->device->lun]; | |
5282 | } | |
5283 | local_irq_restore(flags); | |
5284 | cmd->scsi_done(cmd); | |
5285 | ||
5286 | /* | |
5287 | * We need to run process_issue_queue since termination of this command | |
5288 | * may allow another queued command to execute first? | |
5289 | */ | |
5290 | return SCSI_ABORT_NOT_RUNNING; | |
5291 | } | |
5292 | ||
5293 | /* | |
5294 | * Function : int NCR53c7xx_reset (Scsi_Cmnd *cmd) | |
5295 | * | |
5296 | * Purpose : perform a hard reset of the SCSI bus and NCR | |
5297 | * chip. | |
5298 | * | |
5299 | * Inputs : cmd - command which caused the SCSI RESET | |
5300 | * | |
5301 | * Returns : 0 on success. | |
5302 | */ | |
5303 | ||
5304 | int | |
5305 | NCR53c7xx_reset (Scsi_Cmnd *cmd, unsigned int reset_flags) { | |
5306 | NCR53c7x0_local_declare(); | |
5307 | unsigned long flags; | |
5308 | int found = 0; | |
5309 | struct NCR53c7x0_cmd * c; | |
5310 | Scsi_Cmnd *tmp; | |
5311 | /* | |
5312 | * When we call scsi_done(), it's going to wake up anything sleeping on the | |
5313 | * resources which were in use by the aborted commands, and we'll start to | |
5314 | * get new commands. | |
5315 | * | |
5316 | * We can't let this happen until after we've re-initialized the driver | |
5317 | * structures, and can't reinitialize those structures until after we've | |
5318 | * dealt with their contents. | |
5319 | * | |
5320 | * So, we need to find all of the commands which were running, stick | |
5321 | * them on a linked list of completed commands (we'll use the host_scribble | |
5322 | * pointer), do our reinitialization, and then call the done function for | |
5323 | * each command. | |
5324 | */ | |
5325 | Scsi_Cmnd *nuke_list = NULL; | |
5326 | struct Scsi_Host *host = cmd->device->host; | |
5327 | struct NCR53c7x0_hostdata *hostdata = | |
5328 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
5329 | ||
5330 | NCR53c7x0_local_setup(host); | |
5331 | local_irq_save(flags); | |
5332 | ncr_halt (host); | |
5333 | print_lots (host); | |
5334 | dump_events (host, 30); | |
5335 | ncr_scsi_reset (host); | |
5336 | for (tmp = nuke_list = return_outstanding_commands (host, 1 /* free */, | |
5337 | 0 /* issue */ ); tmp; tmp = (Scsi_Cmnd *) tmp->SCp.buffer) | |
5338 | if (tmp == cmd) { | |
5339 | found = 1; | |
5340 | break; | |
5341 | } | |
5342 | ||
5343 | /* | |
5344 | * If we didn't find the command which caused this reset in our running | |
5345 | * list, then we've lost it. See that it terminates normally anyway. | |
5346 | */ | |
5347 | if (!found) { | |
5348 | c = (struct NCR53c7x0_cmd *) cmd->host_scribble; | |
5349 | if (c) { | |
5350 | cmd->host_scribble = NULL; | |
5351 | c->next = hostdata->free; | |
5352 | hostdata->free = c; | |
5353 | } else | |
5354 | printk ("scsi%d: lost command %ld\n", host->host_no, cmd->pid); | |
5355 | cmd->SCp.buffer = (struct scatterlist *) nuke_list; | |
5356 | nuke_list = cmd; | |
5357 | } | |
5358 | ||
5359 | NCR53c7x0_driver_init (host); | |
5360 | hostdata->soft_reset (host); | |
5361 | if (hostdata->resets == 0) | |
5362 | disable(host); | |
5363 | else if (hostdata->resets != -1) | |
5364 | --hostdata->resets; | |
5365 | local_irq_restore(flags); | |
5366 | for (; nuke_list; nuke_list = tmp) { | |
5367 | tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer; | |
5368 | nuke_list->result = DID_RESET << 16; | |
5369 | nuke_list->scsi_done (nuke_list); | |
5370 | } | |
5371 | local_irq_restore(flags); | |
5372 | return SCSI_RESET_SUCCESS; | |
5373 | } | |
5374 | ||
5375 | /* | |
5376 | * The NCR SDMS bios follows Annex A of the SCSI-CAM draft, and | |
5377 | * therefore shares the scsicam_bios_param function. | |
5378 | */ | |
5379 | ||
5380 | /* | |
5381 | * Function : int insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) | |
5382 | * | |
5383 | * Purpose : convert instructions stored at NCR pointer into data | |
5384 | * pointer offset. | |
5385 | * | |
5386 | * Inputs : cmd - SCSI command; insn - pointer to instruction. Either current | |
5387 | * DSP, or saved data pointer. | |
5388 | * | |
5389 | * Returns : offset on success, -1 on failure. | |
5390 | */ | |
5391 | ||
5392 | ||
5393 | static int | |
5394 | insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) { | |
5395 | struct NCR53c7x0_hostdata *hostdata = | |
5396 | (struct NCR53c7x0_hostdata *) cmd->device->host->hostdata[0]; | |
5397 | struct NCR53c7x0_cmd *ncmd = | |
5398 | (struct NCR53c7x0_cmd *) cmd->host_scribble; | |
5399 | int offset = 0, buffers; | |
5400 | struct scatterlist *segment; | |
5401 | char *ptr; | |
5402 | int found = 0; | |
5403 | ||
5404 | /* | |
5405 | * With the current code implementation, if the insn is inside dynamically | |
5406 | * generated code, the data pointer will be the instruction preceding | |
5407 | * the next transfer segment. | |
5408 | */ | |
5409 | ||
5410 | if (!check_address ((unsigned long) ncmd, sizeof (struct NCR53c7x0_cmd)) && | |
5411 | ((insn >= ncmd->data_transfer_start && | |
5412 | insn < ncmd->data_transfer_end) || | |
5413 | (insn >= ncmd->residual && | |
5414 | insn < (ncmd->residual + | |
5415 | sizeof(ncmd->residual))))) { | |
5416 | ptr = bus_to_virt(insn[3]); | |
5417 | ||
5418 | if ((buffers = cmd->use_sg)) { | |
5419 | for (offset = 0, | |
5420 | segment = (struct scatterlist *) cmd->buffer; | |
5421 | buffers && !((found = ((ptr >= (char *)page_address(segment->page)+segment->offset) && | |
5422 | (ptr < ((char *)page_address(segment->page)+segment->offset+segment->length))))); | |
5423 | --buffers, offset += segment->length, ++segment) | |
5424 | #if 0 | |
5425 | printk("scsi%d: comparing 0x%p to 0x%p\n", | |
5426 | cmd->device->host->host_no, saved, page_address(segment->page+segment->offset); | |
5427 | #else | |
5428 | ; | |
5429 | #endif | |
5430 | offset += ptr - ((char *)page_address(segment->page)+segment->offset); | |
5431 | } else { | |
5432 | found = 1; | |
5433 | offset = ptr - (char *) (cmd->request_buffer); | |
5434 | } | |
5435 | } else if ((insn >= hostdata->script + | |
5436 | hostdata->E_data_transfer / sizeof(u32)) && | |
5437 | (insn <= hostdata->script + | |
5438 | hostdata->E_end_data_transfer / sizeof(u32))) { | |
5439 | found = 1; | |
5440 | offset = 0; | |
5441 | } | |
5442 | return found ? offset : -1; | |
5443 | } | |
5444 | ||
5445 | ||
5446 | ||
5447 | /* | |
5448 | * Function : void print_progress (Scsi_Cmnd *cmd) | |
5449 | * | |
5450 | * Purpose : print the current location of the saved data pointer | |
5451 | * | |
5452 | * Inputs : cmd - command we are interested in | |
5453 | * | |
5454 | */ | |
5455 | ||
5456 | static void | |
5457 | print_progress (Scsi_Cmnd *cmd) { | |
5458 | NCR53c7x0_local_declare(); | |
5459 | struct NCR53c7x0_cmd *ncmd = | |
5460 | (struct NCR53c7x0_cmd *) cmd->host_scribble; | |
5461 | int offset, i; | |
5462 | char *where; | |
5463 | u32 *ptr; | |
5464 | NCR53c7x0_local_setup (cmd->device->host); | |
5465 | ||
5466 | if (check_address ((unsigned long) ncmd,sizeof (struct NCR53c7x0_cmd)) == 0) | |
5467 | { | |
5468 | printk("\nNCR53c7x0_cmd fields:\n"); | |
5469 | printk(" bounce.len=0x%x, addr=0x%0x, buf[]=0x%02x %02x %02x %02x\n", | |
5470 | ncmd->bounce.len, ncmd->bounce.addr, ncmd->bounce.buf[0], | |
5471 | ncmd->bounce.buf[1], ncmd->bounce.buf[2], ncmd->bounce.buf[3]); | |
5472 | printk(" result=%04x, cdb[0]=0x%02x\n", ncmd->result, ncmd->cmnd[0]); | |
5473 | } | |
5474 | ||
5475 | for (i = 0; i < 2; ++i) { | |
5476 | if (check_address ((unsigned long) ncmd, | |
5477 | sizeof (struct NCR53c7x0_cmd)) == -1) | |
5478 | continue; | |
5479 | if (!i) { | |
5480 | where = "saved"; | |
5481 | ptr = bus_to_virt(ncmd->saved_data_pointer); | |
5482 | } else { | |
5483 | where = "active"; | |
5484 | ptr = bus_to_virt (NCR53c7x0_read32 (DSP_REG) - | |
5485 | NCR53c7x0_insn_size (NCR53c7x0_read8 (DCMD_REG)) * | |
5486 | sizeof(u32)); | |
5487 | } | |
5488 | offset = insn_to_offset (cmd, ptr); | |
5489 | ||
5490 | if (offset != -1) | |
5491 | printk ("scsi%d : %s data pointer at offset %d\n", | |
5492 | cmd->device->host->host_no, where, offset); | |
5493 | else { | |
5494 | int size; | |
5495 | printk ("scsi%d : can't determine %s data pointer offset\n", | |
5496 | cmd->device->host->host_no, where); | |
5497 | if (ncmd) { | |
5498 | size = print_insn (cmd->device->host, | |
5499 | bus_to_virt(ncmd->saved_data_pointer), "", 1); | |
5500 | print_insn (cmd->device->host, | |
5501 | bus_to_virt(ncmd->saved_data_pointer) + size * sizeof(u32), | |
5502 | "", 1); | |
5503 | } | |
5504 | } | |
5505 | } | |
5506 | } | |
5507 | ||
5508 | ||
5509 | static void | |
5510 | print_dsa (struct Scsi_Host *host, u32 *dsa, const char *prefix) { | |
5511 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5512 | host->hostdata[0]; | |
5513 | int i, len; | |
5514 | char *ptr; | |
5515 | Scsi_Cmnd *cmd; | |
5516 | ||
5517 | if (check_address ((unsigned long) dsa, hostdata->dsa_end - | |
5518 | hostdata->dsa_start) == -1) { | |
5519 | printk("scsi%d : bad dsa virt 0x%p\n", host->host_no, dsa); | |
5520 | return; | |
5521 | } | |
5522 | printk("%sscsi%d : dsa at phys 0x%lx (virt 0x%p)\n" | |
5523 | " + %d : dsa_msgout length = %u, data = 0x%x (virt 0x%p)\n" , | |
5524 | prefix ? prefix : "", | |
5525 | host->host_no, virt_to_bus (dsa), dsa, hostdata->dsa_msgout, | |
5526 | dsa[hostdata->dsa_msgout / sizeof(u32)], | |
5527 | dsa[hostdata->dsa_msgout / sizeof(u32) + 1], | |
5528 | bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1])); | |
5529 | ||
5530 | /* | |
5531 | * Only print messages if they're sane in length so we don't | |
5532 | * blow the kernel printk buffer on something which won't buy us | |
5533 | * anything. | |
5534 | */ | |
5535 | ||
5536 | if (dsa[hostdata->dsa_msgout / sizeof(u32)] < | |
5537 | sizeof (hostdata->free->select)) | |
5538 | for (i = dsa[hostdata->dsa_msgout / sizeof(u32)], | |
5539 | ptr = bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1]); | |
5540 | i > 0 && !check_address ((unsigned long) ptr, 1); | |
5541 | ptr += len, i -= len) { | |
5542 | printk(" "); | |
1abfd370 | 5543 | len = spi_print_msg(ptr); |
1da177e4 LT |
5544 | printk("\n"); |
5545 | if (!len) | |
5546 | break; | |
5547 | } | |
5548 | ||
5549 | printk(" + %d : select_indirect = 0x%x\n", | |
5550 | hostdata->dsa_select, dsa[hostdata->dsa_select / sizeof(u32)]); | |
5551 | cmd = (Scsi_Cmnd *) bus_to_virt(dsa[hostdata->dsa_cmnd / sizeof(u32)]); | |
5552 | printk(" + %d : dsa_cmnd = 0x%x ", hostdata->dsa_cmnd, | |
5553 | (u32) virt_to_bus(cmd)); | |
5554 | /* XXX Maybe we should access cmd->host_scribble->result here. RGH */ | |
5555 | if (cmd) { | |
5556 | printk(" result = 0x%x, target = %d, lun = %d, cmd = ", | |
5557 | cmd->result, cmd->device->id, cmd->device->lun); | |
db9dff36 | 5558 | __scsi_print_command(cmd->cmnd); |
1da177e4 LT |
5559 | } else |
5560 | printk("\n"); | |
5561 | printk(" + %d : dsa_next = 0x%x\n", hostdata->dsa_next, | |
5562 | dsa[hostdata->dsa_next / sizeof(u32)]); | |
5563 | if (cmd) { | |
5564 | printk("scsi%d target %d : sxfer_sanity = 0x%x, scntl3_sanity = 0x%x\n" | |
5565 | " script : ", | |
5566 | host->host_no, cmd->device->id, | |
5567 | hostdata->sync[cmd->device->id].sxfer_sanity, | |
5568 | hostdata->sync[cmd->device->id].scntl3_sanity); | |
5569 | for (i = 0; i < (sizeof(hostdata->sync[cmd->device->id].script) / 4); ++i) | |
5570 | printk ("0x%x ", hostdata->sync[cmd->device->id].script[i]); | |
5571 | printk ("\n"); | |
5572 | print_progress (cmd); | |
5573 | } | |
5574 | } | |
5575 | /* | |
5576 | * Function : void print_queues (Scsi_Host *host) | |
5577 | * | |
5578 | * Purpose : print the contents of the NCR issue and reconnect queues | |
5579 | * | |
5580 | * Inputs : host - SCSI host we are interested in | |
5581 | * | |
5582 | */ | |
5583 | ||
5584 | static void | |
5585 | print_queues (struct Scsi_Host *host) { | |
5586 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5587 | host->hostdata[0]; | |
5588 | u32 *dsa, *next_dsa; | |
5589 | volatile u32 *ncrcurrent; | |
5590 | int left; | |
5591 | Scsi_Cmnd *cmd, *next_cmd; | |
5592 | unsigned long flags; | |
5593 | ||
5594 | printk ("scsi%d : issue queue\n", host->host_no); | |
5595 | ||
5596 | for (left = host->can_queue, cmd = (Scsi_Cmnd *) hostdata->issue_queue; | |
5597 | left >= 0 && cmd; | |
5598 | cmd = next_cmd) { | |
5599 | next_cmd = (Scsi_Cmnd *) cmd->SCp.ptr; | |
5600 | local_irq_save(flags); | |
5601 | if (cmd->host_scribble) { | |
5602 | if (check_address ((unsigned long) (cmd->host_scribble), | |
5603 | sizeof (cmd->host_scribble)) == -1) | |
5604 | printk ("scsi%d: scsi pid %ld bad pointer to NCR53c7x0_cmd\n", | |
5605 | host->host_no, cmd->pid); | |
5606 | /* print_dsa does sanity check on address, no need to check */ | |
5607 | else | |
5608 | print_dsa (host, ((struct NCR53c7x0_cmd *) cmd->host_scribble) | |
5609 | -> dsa, ""); | |
5610 | } else | |
5611 | printk ("scsi%d : scsi pid %ld for target %d lun %d has no NCR53c7x0_cmd\n", | |
5612 | host->host_no, cmd->pid, cmd->device->id, cmd->device->lun); | |
5613 | local_irq_restore(flags); | |
5614 | } | |
5615 | ||
5616 | if (left <= 0) { | |
5617 | printk ("scsi%d : loop detected in issue queue\n", | |
5618 | host->host_no); | |
5619 | } | |
5620 | ||
5621 | /* | |
5622 | * Traverse the NCR reconnect and start DSA structures, printing out | |
5623 | * each element until we hit the end or detect a loop. Currently, | |
5624 | * the reconnect structure is a linked list; and the start structure | |
5625 | * is an array. Eventually, the reconnect structure will become a | |
5626 | * list as well, since this simplifies the code. | |
5627 | */ | |
5628 | ||
5629 | printk ("scsi%d : schedule dsa array :\n", host->host_no); | |
5630 | for (left = host->can_queue, ncrcurrent = hostdata->schedule; | |
5631 | left > 0; ncrcurrent += 2, --left) | |
5632 | if (ncrcurrent[0] != hostdata->NOP_insn) | |
5633 | /* FIXME : convert pointer to dsa_begin to pointer to dsa. */ | |
5634 | print_dsa (host, bus_to_virt (ncrcurrent[1] - | |
5635 | (hostdata->E_dsa_code_begin - | |
5636 | hostdata->E_dsa_code_template)), ""); | |
5637 | printk ("scsi%d : end schedule dsa array\n", host->host_no); | |
5638 | ||
5639 | printk ("scsi%d : reconnect_dsa_head :\n", host->host_no); | |
5640 | ||
5641 | for (left = host->can_queue, | |
5642 | dsa = bus_to_virt (hostdata->reconnect_dsa_head); | |
5643 | left >= 0 && dsa; | |
5644 | dsa = next_dsa) { | |
5645 | local_irq_save(flags); | |
5646 | if (check_address ((unsigned long) dsa, sizeof(dsa)) == -1) { | |
5647 | printk ("scsi%d: bad DSA pointer 0x%p", host->host_no, | |
5648 | dsa); | |
5649 | next_dsa = NULL; | |
5650 | } | |
5651 | else | |
5652 | { | |
5653 | next_dsa = bus_to_virt(dsa[hostdata->dsa_next / sizeof(u32)]); | |
5654 | print_dsa (host, dsa, ""); | |
5655 | } | |
5656 | local_irq_restore(flags); | |
5657 | } | |
5658 | printk ("scsi%d : end reconnect_dsa_head\n", host->host_no); | |
5659 | if (left < 0) | |
5660 | printk("scsi%d: possible loop in ncr reconnect list\n", | |
5661 | host->host_no); | |
5662 | } | |
5663 | ||
5664 | static void | |
5665 | print_lots (struct Scsi_Host *host) { | |
5666 | NCR53c7x0_local_declare(); | |
5667 | struct NCR53c7x0_hostdata *hostdata = | |
5668 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
5669 | u32 *dsp_next, *dsp, *dsa, dbc_dcmd; | |
5670 | unsigned char dcmd, sbcl; | |
5671 | int i, size; | |
5672 | NCR53c7x0_local_setup(host); | |
5673 | ||
5674 | if ((dsp_next = bus_to_virt(NCR53c7x0_read32 (DSP_REG)))) { | |
5675 | dbc_dcmd = NCR53c7x0_read32(DBC_REG); | |
5676 | dcmd = (dbc_dcmd & 0xff000000) >> 24; | |
5677 | dsp = dsp_next - NCR53c7x0_insn_size(dcmd); | |
5678 | dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); | |
5679 | sbcl = NCR53c7x0_read8 (SBCL_REG); | |
5680 | ||
5681 | /* | |
5682 | * For the 53c710, the following will report value 0 for SCNTL3 | |
5683 | * and STEST0 - we don't have these registers. | |
5684 | */ | |
5685 | printk ("scsi%d : DCMD|DBC=0x%x, DNAD=0x%x (virt 0x%p)\n" | |
5686 | " DSA=0x%lx (virt 0x%p)\n" | |
5687 | " DSPS=0x%x, TEMP=0x%x (virt 0x%p), DMODE=0x%x\n" | |
5688 | " SXFER=0x%x, SCNTL3=0x%x\n" | |
5689 | " %s%s%sphase=%s, %d bytes in SCSI FIFO\n" | |
5690 | " SCRATCH=0x%x, saved2_dsa=0x%0lx\n", | |
5691 | host->host_no, dbc_dcmd, NCR53c7x0_read32(DNAD_REG), | |
5692 | bus_to_virt(NCR53c7x0_read32(DNAD_REG)), | |
5693 | virt_to_bus(dsa), dsa, | |
5694 | NCR53c7x0_read32(DSPS_REG), NCR53c7x0_read32(TEMP_REG), | |
5695 | bus_to_virt (NCR53c7x0_read32(TEMP_REG)), | |
5696 | (int) NCR53c7x0_read8(hostdata->dmode), | |
5697 | (int) NCR53c7x0_read8(SXFER_REG), | |
5698 | ((hostdata->chip / 100) == 8) ? | |
5699 | (int) NCR53c7x0_read8(SCNTL3_REG_800) : 0, | |
5700 | (sbcl & SBCL_BSY) ? "BSY " : "", | |
5701 | (sbcl & SBCL_SEL) ? "SEL " : "", | |
5702 | (sbcl & SBCL_REQ) ? "REQ " : "", | |
5703 | sstat2_to_phase(NCR53c7x0_read8 (((hostdata->chip / 100) == 8) ? | |
5704 | SSTAT1_REG : SSTAT2_REG)), | |
5705 | (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ? | |
5706 | SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT, | |
5707 | ((hostdata->chip / 100) == 8) ? NCR53c7x0_read8 (STEST0_REG_800) : | |
5708 | NCR53c7x0_read32(SCRATCHA_REG_800), | |
5709 | hostdata->saved2_dsa); | |
5710 | printk ("scsi%d : DSP 0x%lx (virt 0x%p) ->\n", host->host_no, | |
5711 | virt_to_bus(dsp), dsp); | |
5712 | for (i = 6; i > 0; --i, dsp += size) | |
5713 | size = print_insn (host, dsp, "", 1); | |
5714 | if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { | |
5715 | if ((hostdata->chip / 100) == 8) | |
5716 | printk ("scsi%d : connected (SDID=0x%x, SSID=0x%x)\n", | |
5717 | host->host_no, NCR53c7x0_read8 (SDID_REG_800), | |
5718 | NCR53c7x0_read8 (SSID_REG_800)); | |
5719 | else | |
5720 | printk ("scsi%d : connected (SDID=0x%x)\n", | |
5721 | host->host_no, NCR53c7x0_read8 (SDID_REG_700)); | |
5722 | print_dsa (host, dsa, ""); | |
5723 | } | |
5724 | ||
5725 | #if 1 | |
5726 | print_queues (host); | |
5727 | #endif | |
5728 | } | |
5729 | } | |
5730 | ||
5731 | /* | |
5732 | * Function : static int shutdown (struct Scsi_Host *host) | |
5733 | * | |
5734 | * Purpose : does a clean (we hope) shutdown of the NCR SCSI | |
5735 | * chip. Use prior to dumping core, unloading the NCR driver, | |
5736 | * | |
5737 | * Returns : 0 on success | |
5738 | */ | |
5739 | static int | |
5740 | shutdown (struct Scsi_Host *host) { | |
5741 | NCR53c7x0_local_declare(); | |
5742 | unsigned long flags; | |
5743 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5744 | host->hostdata[0]; | |
5745 | NCR53c7x0_local_setup(host); | |
5746 | local_irq_save(flags); | |
5747 | /* Get in a state where we can reset the SCSI bus */ | |
5748 | ncr_halt (host); | |
5749 | ncr_scsi_reset (host); | |
5750 | hostdata->soft_reset(host); | |
5751 | ||
5752 | disable (host); | |
5753 | local_irq_restore(flags); | |
5754 | return 0; | |
5755 | } | |
5756 | ||
5757 | /* | |
5758 | * Function : void ncr_scsi_reset (struct Scsi_Host *host) | |
5759 | * | |
5760 | * Purpose : reset the SCSI bus. | |
5761 | */ | |
5762 | ||
5763 | static void | |
5764 | ncr_scsi_reset (struct Scsi_Host *host) { | |
5765 | NCR53c7x0_local_declare(); | |
5766 | unsigned long flags; | |
5767 | NCR53c7x0_local_setup(host); | |
5768 | local_irq_save(flags); | |
5769 | NCR53c7x0_write8(SCNTL1_REG, SCNTL1_RST); | |
5770 | udelay(25); /* Minimum amount of time to assert RST */ | |
5771 | NCR53c7x0_write8(SCNTL1_REG, 0); | |
5772 | local_irq_restore(flags); | |
5773 | } | |
5774 | ||
5775 | /* | |
5776 | * Function : void hard_reset (struct Scsi_Host *host) | |
5777 | * | |
5778 | */ | |
5779 | ||
5780 | static void | |
5781 | hard_reset (struct Scsi_Host *host) { | |
5782 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5783 | host->hostdata[0]; | |
5784 | unsigned long flags; | |
5785 | local_irq_save(flags); | |
5786 | ncr_scsi_reset(host); | |
5787 | NCR53c7x0_driver_init (host); | |
5788 | if (hostdata->soft_reset) | |
5789 | hostdata->soft_reset (host); | |
5790 | local_irq_restore(flags); | |
5791 | } | |
5792 | ||
5793 | ||
5794 | /* | |
5795 | * Function : Scsi_Cmnd *return_outstanding_commands (struct Scsi_Host *host, | |
5796 | * int free, int issue) | |
5797 | * | |
5798 | * Purpose : return a linked list (using the SCp.buffer field as next, | |
5799 | * so we don't perturb hostdata. We don't use a field of the | |
5800 | * NCR53c7x0_cmd structure since we may not have allocated one | |
5801 | * for the command causing the reset.) of Scsi_Cmnd structures that | |
5802 | * had propagated below the Linux issue queue level. If free is set, | |
5803 | * free the NCR53c7x0_cmd structures which are associated with | |
5804 | * the Scsi_Cmnd structures, and clean up any internal | |
5805 | * NCR lists that the commands were on. If issue is set, | |
5806 | * also return commands in the issue queue. | |
5807 | * | |
5808 | * Returns : linked list of commands | |
5809 | * | |
5810 | * NOTE : the caller should insure that the NCR chip is halted | |
5811 | * if the free flag is set. | |
5812 | */ | |
5813 | ||
5814 | static Scsi_Cmnd * | |
5815 | return_outstanding_commands (struct Scsi_Host *host, int free, int issue) { | |
5816 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5817 | host->hostdata[0]; | |
5818 | struct NCR53c7x0_cmd *c; | |
5819 | int i; | |
5820 | u32 *ncrcurrent; | |
5821 | Scsi_Cmnd *list = NULL, *tmp; | |
5822 | for (c = (struct NCR53c7x0_cmd *) hostdata->running_list; c; | |
5823 | c = (struct NCR53c7x0_cmd *) c->next) { | |
5824 | if (c->cmd->SCp.buffer) { | |
5825 | printk ("scsi%d : loop detected in running list!\n", host->host_no); | |
5826 | break; | |
5827 | } else { | |
5828 | printk ("Duh? Bad things happening in the NCR driver\n"); | |
5829 | break; | |
5830 | } | |
5831 | ||
5832 | c->cmd->SCp.buffer = (struct scatterlist *) list; | |
5833 | list = c->cmd; | |
5834 | if (free) { | |
5835 | c->next = hostdata->free; | |
5836 | hostdata->free = c; | |
5837 | } | |
5838 | } | |
5839 | ||
5840 | if (free) { | |
5841 | for (i = 0, ncrcurrent = (u32 *) hostdata->schedule; | |
5842 | i < host->can_queue; ++i, ncrcurrent += 2) { | |
5843 | ncrcurrent[0] = hostdata->NOP_insn; | |
5844 | ncrcurrent[1] = 0xdeadbeef; | |
5845 | } | |
5846 | hostdata->ncrcurrent = NULL; | |
5847 | } | |
5848 | ||
5849 | if (issue) { | |
5850 | for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; tmp = tmp->next) { | |
5851 | if (tmp->SCp.buffer) { | |
5852 | printk ("scsi%d : loop detected in issue queue!\n", | |
5853 | host->host_no); | |
5854 | break; | |
5855 | } | |
5856 | tmp->SCp.buffer = (struct scatterlist *) list; | |
5857 | list = tmp; | |
5858 | } | |
5859 | if (free) | |
5860 | hostdata->issue_queue = NULL; | |
5861 | ||
5862 | } | |
5863 | return list; | |
5864 | } | |
5865 | ||
5866 | /* | |
5867 | * Function : static int disable (struct Scsi_Host *host) | |
5868 | * | |
5869 | * Purpose : disables the given NCR host, causing all commands | |
5870 | * to return a driver error. Call this so we can unload the | |
5871 | * module during development and try again. Eventually, | |
5872 | * we should be able to find clean workarounds for these | |
5873 | * problems. | |
5874 | * | |
5875 | * Inputs : host - hostadapter to twiddle | |
5876 | * | |
5877 | * Returns : 0 on success. | |
5878 | */ | |
5879 | ||
5880 | static int | |
5881 | disable (struct Scsi_Host *host) { | |
5882 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5883 | host->hostdata[0]; | |
5884 | unsigned long flags; | |
5885 | Scsi_Cmnd *nuke_list, *tmp; | |
5886 | local_irq_save(flags); | |
5887 | if (hostdata->state != STATE_HALTED) | |
5888 | ncr_halt (host); | |
5889 | nuke_list = return_outstanding_commands (host, 1 /* free */, 1 /* issue */); | |
5890 | hard_reset (host); | |
5891 | hostdata->state = STATE_DISABLED; | |
5892 | local_irq_restore(flags); | |
5893 | printk ("scsi%d : nuking commands\n", host->host_no); | |
5894 | for (; nuke_list; nuke_list = tmp) { | |
5895 | tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer; | |
5896 | nuke_list->result = DID_ERROR << 16; | |
5897 | nuke_list->scsi_done(nuke_list); | |
5898 | } | |
5899 | printk ("scsi%d : done. \n", host->host_no); | |
5900 | printk (KERN_ALERT "scsi%d : disabled. Unload and reload\n", | |
5901 | host->host_no); | |
5902 | return 0; | |
5903 | } | |
5904 | ||
5905 | /* | |
5906 | * Function : static int ncr_halt (struct Scsi_Host *host) | |
5907 | * | |
5908 | * Purpose : halts the SCSI SCRIPTS(tm) processor on the NCR chip | |
5909 | * | |
5910 | * Inputs : host - SCSI chip to halt | |
5911 | * | |
5912 | * Returns : 0 on success | |
5913 | */ | |
5914 | ||
5915 | static int | |
5916 | ncr_halt (struct Scsi_Host *host) { | |
5917 | NCR53c7x0_local_declare(); | |
5918 | unsigned long flags; | |
5919 | unsigned char istat, tmp; | |
5920 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5921 | host->hostdata[0]; | |
5922 | int stage; | |
5923 | NCR53c7x0_local_setup(host); | |
5924 | ||
5925 | local_irq_save(flags); | |
5926 | /* Stage 0 : eat all interrupts | |
5927 | Stage 1 : set ABORT | |
5928 | Stage 2 : eat all but abort interrupts | |
5929 | Stage 3 : eat all interrupts | |
5930 | */ | |
5931 | for (stage = 0;;) { | |
5932 | if (stage == 1) { | |
5933 | NCR53c7x0_write8(hostdata->istat, ISTAT_ABRT); | |
5934 | ++stage; | |
5935 | } | |
5936 | istat = NCR53c7x0_read8 (hostdata->istat); | |
5937 | if (istat & ISTAT_SIP) { | |
5938 | tmp = NCR53c7x0_read8(SSTAT0_REG); | |
5939 | } else if (istat & ISTAT_DIP) { | |
5940 | tmp = NCR53c7x0_read8(DSTAT_REG); | |
5941 | if (stage == 2) { | |
5942 | if (tmp & DSTAT_ABRT) { | |
5943 | NCR53c7x0_write8(hostdata->istat, 0); | |
5944 | ++stage; | |
5945 | } else { | |
5946 | printk(KERN_ALERT "scsi%d : could not halt NCR chip\n", | |
5947 | host->host_no); | |
5948 | disable (host); | |
5949 | } | |
5950 | } | |
5951 | } | |
5952 | if (!(istat & (ISTAT_SIP|ISTAT_DIP))) { | |
5953 | if (stage == 0) | |
5954 | ++stage; | |
5955 | else if (stage == 3) | |
5956 | break; | |
5957 | } | |
5958 | } | |
5959 | hostdata->state = STATE_HALTED; | |
5960 | local_irq_restore(flags); | |
5961 | #if 0 | |
5962 | print_lots (host); | |
5963 | #endif | |
5964 | return 0; | |
5965 | } | |
5966 | ||
5967 | /* | |
5968 | * Function: event_name (int event) | |
5969 | * | |
5970 | * Purpose: map event enum into user-readable strings. | |
5971 | */ | |
5972 | ||
5973 | static const char * | |
5974 | event_name (int event) { | |
5975 | switch (event) { | |
5976 | case EVENT_NONE: return "none"; | |
5977 | case EVENT_ISSUE_QUEUE: return "to issue queue"; | |
5978 | case EVENT_START_QUEUE: return "to start queue"; | |
5979 | case EVENT_SELECT: return "selected"; | |
5980 | case EVENT_DISCONNECT: return "disconnected"; | |
5981 | case EVENT_RESELECT: return "reselected"; | |
5982 | case EVENT_COMPLETE: return "completed"; | |
5983 | case EVENT_IDLE: return "idle"; | |
5984 | case EVENT_SELECT_FAILED: return "select failed"; | |
5985 | case EVENT_BEFORE_SELECT: return "before select"; | |
5986 | case EVENT_RESELECT_FAILED: return "reselect failed"; | |
5987 | default: return "unknown"; | |
5988 | } | |
5989 | } | |
5990 | ||
5991 | /* | |
5992 | * Function : void dump_events (struct Scsi_Host *host, count) | |
5993 | * | |
5994 | * Purpose : print last count events which have occurred. | |
5995 | */ | |
5996 | static void | |
5997 | dump_events (struct Scsi_Host *host, int count) { | |
5998 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) | |
5999 | host->hostdata[0]; | |
6000 | struct NCR53c7x0_event event; | |
6001 | int i; | |
6002 | unsigned long flags; | |
6003 | if (hostdata->events) { | |
6004 | if (count > hostdata->event_size) | |
6005 | count = hostdata->event_size; | |
6006 | for (i = hostdata->event_index; count > 0; | |
6007 | i = (i ? i - 1 : hostdata->event_size -1), --count) { | |
6008 | /* | |
6009 | * By copying the event we're currently examining with interrupts | |
6010 | * disabled, we can do multiple printk(), etc. operations and | |
6011 | * still be guaranteed that they're happening on the same | |
6012 | * event structure. | |
6013 | */ | |
6014 | local_irq_save(flags); | |
6015 | #if 0 | |
6016 | event = hostdata->events[i]; | |
6017 | #else | |
6018 | memcpy ((void *) &event, (void *) &(hostdata->events[i]), | |
6019 | sizeof(event)); | |
6020 | #endif | |
6021 | ||
6022 | local_irq_restore(flags); | |
6023 | printk ("scsi%d : %s event %d at %ld secs %ld usecs target %d lun %d\n", | |
6024 | host->host_no, event_name (event.event), count, | |
6025 | (long) event.time.tv_sec, (long) event.time.tv_usec, | |
6026 | event.target, event.lun); | |
6027 | if (event.dsa) | |
6028 | printk (" event for dsa 0x%lx (virt 0x%p)\n", | |
6029 | virt_to_bus(event.dsa), event.dsa); | |
6030 | if (event.pid != -1) { | |
6031 | printk (" event for pid %ld ", event.pid); | |
db9dff36 | 6032 | __scsi_print_command (event.cmnd); |
1da177e4 LT |
6033 | } |
6034 | } | |
6035 | } | |
6036 | } | |
6037 | ||
6038 | /* | |
6039 | * Function: check_address | |
6040 | * | |
6041 | * Purpose: Check to see if a possibly corrupt pointer will fault the | |
6042 | * kernel. | |
6043 | * | |
6044 | * Inputs: addr - address; size - size of area | |
6045 | * | |
6046 | * Returns: 0 if area is OK, -1 on error. | |
6047 | * | |
6048 | * NOTES: should be implemented in terms of vverify on kernels | |
6049 | * that have it. | |
6050 | */ | |
6051 | ||
6052 | static int | |
6053 | check_address (unsigned long addr, int size) { | |
6054 | return (virt_to_phys((void *)addr) < PAGE_SIZE || virt_to_phys((void *)(addr + size)) > virt_to_phys(high_memory) ? -1 : 0); | |
6055 | } | |
6056 | ||
6057 | #ifdef MODULE | |
6058 | int | |
6059 | NCR53c7x0_release(struct Scsi_Host *host) { | |
6060 | struct NCR53c7x0_hostdata *hostdata = | |
6061 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; | |
6062 | struct NCR53c7x0_cmd *cmd, *tmp; | |
6063 | shutdown (host); | |
6064 | if (host->irq != SCSI_IRQ_NONE) | |
6065 | { | |
6066 | int irq_count; | |
6067 | struct Scsi_Host *tmp; | |
6068 | for (irq_count = 0, tmp = first_host; tmp; tmp = tmp->next) | |
6069 | if (tmp->hostt == the_template && tmp->irq == host->irq) | |
6070 | ++irq_count; | |
6071 | if (irq_count == 1) | |
6072 | free_irq(host->irq, NULL); | |
6073 | } | |
6074 | if (host->dma_channel != DMA_NONE) | |
6075 | free_dma(host->dma_channel); | |
6076 | if (host->io_port) | |
6077 | release_region(host->io_port, host->n_io_port); | |
6078 | ||
6079 | for (cmd = (struct NCR53c7x0_cmd *) hostdata->free; cmd; cmd = tmp, | |
6080 | --hostdata->num_cmds) { | |
6081 | tmp = (struct NCR53c7x0_cmd *) cmd->next; | |
6082 | /* | |
6083 | * If we're going to loop, try to stop it to get a more accurate | |
6084 | * count of the leaked commands. | |
6085 | */ | |
6086 | cmd->next = NULL; | |
6087 | if (cmd->free) | |
6088 | cmd->free ((void *) cmd->real, cmd->size); | |
6089 | } | |
6090 | if (hostdata->num_cmds) | |
6091 | printk ("scsi%d : leaked %d NCR53c7x0_cmd structures\n", | |
6092 | host->host_no, hostdata->num_cmds); | |
f9101210 JJ |
6093 | |
6094 | vfree(hostdata->events); | |
1da177e4 LT |
6095 | |
6096 | /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which | |
6097 | * XXX may be invalid (CONFIG_060_WRITETHROUGH) | |
6098 | */ | |
6099 | kernel_set_cachemode((void *)hostdata, 8192, IOMAP_FULL_CACHING); | |
6100 | free_pages ((u32)hostdata, 1); | |
6101 | return 1; | |
6102 | } | |
6103 | #endif /* def MODULE */ |