Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IEEE 1394 for Linux | |
3 | * | |
4 | * CSR implementation, iso/bus manager implementation. | |
5 | * | |
6 | * Copyright (C) 1999 Andreas E. Bombe | |
7 | * 2002 Manfred Weihs <weihs@ict.tuwien.ac.at> | |
8 | * | |
9 | * This code is licensed under the GPL. See the file COPYING in the root | |
10 | * directory of the kernel sources for details. | |
11 | * | |
12 | * | |
13 | * Contributions: | |
14 | * | |
15 | * Manfred Weihs <weihs@ict.tuwien.ac.at> | |
16 | * configuration ROM manipulation | |
17 | * | |
18 | */ | |
19 | ||
f0cbefe6 SR |
20 | #include <linux/jiffies.h> |
21 | #include <linux/kernel.h> | |
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/moduleparam.h> | |
24 | #include <linux/param.h> | |
25 | #include <linux/spinlock.h> | |
f0cbefe6 | 26 | #include <linux/string.h> |
1da177e4 LT |
27 | |
28 | #include "csr1212.h" | |
29 | #include "ieee1394_types.h" | |
30 | #include "hosts.h" | |
31 | #include "ieee1394.h" | |
32 | #include "highlevel.h" | |
1934b8b6 | 33 | #include "ieee1394_core.h" |
1da177e4 LT |
34 | |
35 | /* Module Parameters */ | |
36 | /* this module parameter can be used to disable mapping of the FCP registers */ | |
37 | ||
38 | static int fcp = 1; | |
39 | module_param(fcp, int, 0444); | |
40 | MODULE_PARM_DESC(fcp, "Map FCP registers (default = 1, disable = 0)."); | |
41 | ||
42 | static struct csr1212_keyval *node_cap = NULL; | |
43 | ||
44 | static void add_host(struct hpsb_host *host); | |
45 | static void remove_host(struct hpsb_host *host); | |
46 | static void host_reset(struct hpsb_host *host); | |
47 | static int read_maps(struct hpsb_host *host, int nodeid, quadlet_t *buffer, | |
48 | u64 addr, size_t length, u16 fl); | |
49 | static int write_fcp(struct hpsb_host *host, int nodeid, int dest, | |
50 | quadlet_t *data, u64 addr, size_t length, u16 flags); | |
51 | static int read_regs(struct hpsb_host *host, int nodeid, quadlet_t *buf, | |
52 | u64 addr, size_t length, u16 flags); | |
53 | static int write_regs(struct hpsb_host *host, int nodeid, int destid, | |
54 | quadlet_t *data, u64 addr, size_t length, u16 flags); | |
55 | static int lock_regs(struct hpsb_host *host, int nodeid, quadlet_t *store, | |
56 | u64 addr, quadlet_t data, quadlet_t arg, int extcode, u16 fl); | |
57 | static int lock64_regs(struct hpsb_host *host, int nodeid, octlet_t * store, | |
58 | u64 addr, octlet_t data, octlet_t arg, int extcode, u16 fl); | |
59 | static int read_config_rom(struct hpsb_host *host, int nodeid, quadlet_t *buffer, | |
60 | u64 addr, size_t length, u16 fl); | |
61 | static u64 allocate_addr_range(u64 size, u32 alignment, void *__host); | |
62 | static void release_addr_range(u64 addr, void *__host); | |
63 | ||
64 | static struct hpsb_highlevel csr_highlevel = { | |
65 | .name = "standard registers", | |
66 | .add_host = add_host, | |
67 | .remove_host = remove_host, | |
68 | .host_reset = host_reset, | |
69 | }; | |
70 | ||
71 | static struct hpsb_address_ops map_ops = { | |
72 | .read = read_maps, | |
73 | }; | |
74 | ||
75 | static struct hpsb_address_ops fcp_ops = { | |
76 | .write = write_fcp, | |
77 | }; | |
78 | ||
79 | static struct hpsb_address_ops reg_ops = { | |
80 | .read = read_regs, | |
81 | .write = write_regs, | |
82 | .lock = lock_regs, | |
83 | .lock64 = lock64_regs, | |
84 | }; | |
85 | ||
86 | static struct hpsb_address_ops config_rom_ops = { | |
87 | .read = read_config_rom, | |
88 | }; | |
89 | ||
90 | struct csr1212_bus_ops csr_bus_ops = { | |
91 | .allocate_addr_range = allocate_addr_range, | |
92 | .release_addr = release_addr_range, | |
93 | }; | |
94 | ||
95 | ||
96 | static u16 csr_crc16(unsigned *data, int length) | |
97 | { | |
98 | int check=0, i; | |
99 | int shift, sum, next=0; | |
100 | ||
101 | for (i = length; i; i--) { | |
102 | for (next = check, shift = 28; shift >= 0; shift -= 4 ) { | |
103 | sum = ((next >> 12) ^ (be32_to_cpu(*data) >> shift)) & 0xf; | |
104 | next = (next << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum); | |
105 | } | |
106 | check = next & 0xffff; | |
107 | data++; | |
108 | } | |
109 | ||
110 | return check; | |
111 | } | |
112 | ||
113 | static void host_reset(struct hpsb_host *host) | |
114 | { | |
115 | host->csr.state &= 0x300; | |
116 | ||
117 | host->csr.bus_manager_id = 0x3f; | |
118 | host->csr.bandwidth_available = 4915; | |
119 | host->csr.channels_available_hi = 0xfffffffe; /* pre-alloc ch 31 per 1394a-2000 */ | |
120 | host->csr.channels_available_lo = ~0; | |
121 | host->csr.broadcast_channel = 0x80000000 | 31; | |
122 | ||
123 | if (host->is_irm) { | |
124 | if (host->driver->hw_csr_reg) { | |
125 | host->driver->hw_csr_reg(host, 2, 0xfffffffe, ~0); | |
126 | } | |
127 | } | |
128 | ||
129 | host->csr.node_ids = host->node_id << 16; | |
130 | ||
131 | if (!host->is_root) { | |
132 | /* clear cmstr bit */ | |
133 | host->csr.state &= ~0x100; | |
134 | } | |
135 | ||
136 | host->csr.topology_map[1] = | |
137 | cpu_to_be32(be32_to_cpu(host->csr.topology_map[1]) + 1); | |
138 | host->csr.topology_map[2] = cpu_to_be32(host->node_count << 16 | |
139 | | host->selfid_count); | |
140 | host->csr.topology_map[0] = | |
141 | cpu_to_be32((host->selfid_count + 2) << 16 | |
142 | | csr_crc16(host->csr.topology_map + 1, | |
143 | host->selfid_count + 2)); | |
144 | ||
145 | host->csr.speed_map[1] = | |
146 | cpu_to_be32(be32_to_cpu(host->csr.speed_map[1]) + 1); | |
147 | host->csr.speed_map[0] = cpu_to_be32(0x3f1 << 16 | |
148 | | csr_crc16(host->csr.speed_map+1, | |
149 | 0x3f1)); | |
150 | } | |
151 | ||
152 | /* | |
153 | * HI == seconds (bits 0:2) | |
f0cbefe6 | 154 | * LO == fractions of a second in units of 125usec (bits 19:31) |
1da177e4 | 155 | * |
f0cbefe6 SR |
156 | * Convert SPLIT_TIMEOUT to jiffies. |
157 | * The default and minimum as per 1394a-2000 clause 8.3.2.2.6 is 100ms. | |
1da177e4 LT |
158 | */ |
159 | static inline void calculate_expire(struct csr_control *csr) | |
160 | { | |
b63d4fe9 SR |
161 | unsigned int usecs = (csr->split_timeout_hi & 7) * 1000000 + |
162 | (csr->split_timeout_lo >> 19) * 125; | |
1da177e4 | 163 | |
b63d4fe9 | 164 | csr->expire = usecs_to_jiffies(usecs > 100000 ? usecs : 100000); |
1da177e4 LT |
165 | HPSB_VERBOSE("CSR: setting expire to %lu, HZ=%u", csr->expire, HZ); |
166 | } | |
167 | ||
168 | ||
169 | static void add_host(struct hpsb_host *host) | |
170 | { | |
171 | struct csr1212_keyval *root; | |
172 | quadlet_t bus_info[CSR_BUS_INFO_SIZE]; | |
173 | ||
174 | hpsb_register_addrspace(&csr_highlevel, host, ®_ops, | |
175 | CSR_REGISTER_BASE, | |
176 | CSR_REGISTER_BASE + CSR_CONFIG_ROM); | |
177 | hpsb_register_addrspace(&csr_highlevel, host, &config_rom_ops, | |
178 | CSR_REGISTER_BASE + CSR_CONFIG_ROM, | |
179 | CSR_REGISTER_BASE + CSR_CONFIG_ROM_END); | |
180 | if (fcp) { | |
181 | hpsb_register_addrspace(&csr_highlevel, host, &fcp_ops, | |
182 | CSR_REGISTER_BASE + CSR_FCP_COMMAND, | |
183 | CSR_REGISTER_BASE + CSR_FCP_END); | |
184 | } | |
185 | hpsb_register_addrspace(&csr_highlevel, host, &map_ops, | |
186 | CSR_REGISTER_BASE + CSR_TOPOLOGY_MAP, | |
187 | CSR_REGISTER_BASE + CSR_TOPOLOGY_MAP_END); | |
188 | hpsb_register_addrspace(&csr_highlevel, host, &map_ops, | |
189 | CSR_REGISTER_BASE + CSR_SPEED_MAP, | |
190 | CSR_REGISTER_BASE + CSR_SPEED_MAP_END); | |
191 | ||
192 | spin_lock_init(&host->csr.lock); | |
193 | ||
194 | host->csr.state = 0; | |
195 | host->csr.node_ids = 0; | |
196 | host->csr.split_timeout_hi = 0; | |
197 | host->csr.split_timeout_lo = 800 << 19; | |
198 | calculate_expire(&host->csr); | |
199 | host->csr.cycle_time = 0; | |
200 | host->csr.bus_time = 0; | |
201 | host->csr.bus_manager_id = 0x3f; | |
202 | host->csr.bandwidth_available = 4915; | |
203 | host->csr.channels_available_hi = 0xfffffffe; /* pre-alloc ch 31 per 1394a-2000 */ | |
204 | host->csr.channels_available_lo = ~0; | |
205 | host->csr.broadcast_channel = 0x80000000 | 31; | |
206 | ||
207 | if (host->is_irm) { | |
208 | if (host->driver->hw_csr_reg) { | |
209 | host->driver->hw_csr_reg(host, 2, 0xfffffffe, ~0); | |
210 | } | |
211 | } | |
212 | ||
213 | if (host->csr.max_rec >= 9) | |
214 | host->csr.max_rom = 2; | |
215 | else if (host->csr.max_rec >= 5) | |
216 | host->csr.max_rom = 1; | |
217 | else | |
218 | host->csr.max_rom = 0; | |
219 | ||
220 | host->csr.generation = 2; | |
221 | ||
222 | bus_info[1] = __constant_cpu_to_be32(0x31333934); | |
1934b8b6 | 223 | bus_info[2] = cpu_to_be32((hpsb_disable_irm ? 0 : 1 << CSR_IRMC_SHIFT) | |
1da177e4 LT |
224 | (1 << CSR_CMC_SHIFT) | |
225 | (1 << CSR_ISC_SHIFT) | | |
226 | (0 << CSR_BMC_SHIFT) | | |
227 | (0 << CSR_PMC_SHIFT) | | |
228 | (host->csr.cyc_clk_acc << CSR_CYC_CLK_ACC_SHIFT) | | |
229 | (host->csr.max_rec << CSR_MAX_REC_SHIFT) | | |
230 | (host->csr.max_rom << CSR_MAX_ROM_SHIFT) | | |
231 | (host->csr.generation << CSR_GENERATION_SHIFT) | | |
232 | host->csr.lnk_spd); | |
233 | ||
234 | bus_info[3] = cpu_to_be32(host->csr.guid_hi); | |
235 | bus_info[4] = cpu_to_be32(host->csr.guid_lo); | |
236 | ||
237 | /* The hardware copy of the bus info block will be set later when a | |
238 | * bus reset is issued. */ | |
239 | ||
240 | csr1212_init_local_csr(host->csr.rom, bus_info, host->csr.max_rom); | |
241 | ||
242 | root = host->csr.rom->root_kv; | |
243 | ||
244 | if(csr1212_attach_keyval_to_directory(root, node_cap) != CSR1212_SUCCESS) { | |
245 | HPSB_ERR("Failed to attach Node Capabilities to root directory"); | |
246 | } | |
247 | ||
248 | host->update_config_rom = 1; | |
249 | } | |
250 | ||
251 | static void remove_host(struct hpsb_host *host) | |
252 | { | |
253 | quadlet_t bus_info[CSR_BUS_INFO_SIZE]; | |
254 | ||
255 | bus_info[1] = __constant_cpu_to_be32(0x31333934); | |
256 | bus_info[2] = cpu_to_be32((0 << CSR_IRMC_SHIFT) | | |
257 | (0 << CSR_CMC_SHIFT) | | |
258 | (0 << CSR_ISC_SHIFT) | | |
259 | (0 << CSR_BMC_SHIFT) | | |
260 | (0 << CSR_PMC_SHIFT) | | |
261 | (host->csr.cyc_clk_acc << CSR_CYC_CLK_ACC_SHIFT) | | |
262 | (host->csr.max_rec << CSR_MAX_REC_SHIFT) | | |
263 | (0 << CSR_MAX_ROM_SHIFT) | | |
264 | (0 << CSR_GENERATION_SHIFT) | | |
265 | host->csr.lnk_spd); | |
266 | ||
267 | bus_info[3] = cpu_to_be32(host->csr.guid_hi); | |
268 | bus_info[4] = cpu_to_be32(host->csr.guid_lo); | |
269 | ||
270 | csr1212_detach_keyval_from_directory(host->csr.rom->root_kv, node_cap); | |
271 | ||
272 | csr1212_init_local_csr(host->csr.rom, bus_info, 0); | |
273 | host->update_config_rom = 1; | |
274 | } | |
275 | ||
276 | ||
277 | int hpsb_update_config_rom(struct hpsb_host *host, const quadlet_t *new_rom, | |
278 | size_t buffersize, unsigned char rom_version) | |
279 | { | |
280 | unsigned long flags; | |
281 | int ret; | |
282 | ||
283 | HPSB_NOTICE("hpsb_update_config_rom() is deprecated"); | |
284 | ||
285 | spin_lock_irqsave(&host->csr.lock, flags); | |
286 | if (rom_version != host->csr.generation) | |
287 | ret = -1; | |
288 | else if (buffersize > host->csr.rom->cache_head->size) | |
289 | ret = -2; | |
290 | else { | |
291 | /* Just overwrite the generated ConfigROM image with new data, | |
292 | * it can be regenerated later. */ | |
293 | memcpy(host->csr.rom->cache_head->data, new_rom, buffersize); | |
294 | host->csr.rom->cache_head->len = buffersize; | |
295 | ||
296 | if (host->driver->set_hw_config_rom) | |
297 | host->driver->set_hw_config_rom(host, host->csr.rom->bus_info_data); | |
298 | /* Increment the generation number to keep some sort of sync | |
299 | * with the newer ConfigROM manipulation method. */ | |
300 | host->csr.generation++; | |
301 | if (host->csr.generation > 0xf || host->csr.generation < 2) | |
302 | host->csr.generation = 2; | |
303 | ret=0; | |
304 | } | |
305 | spin_unlock_irqrestore(&host->csr.lock, flags); | |
306 | return ret; | |
307 | } | |
308 | ||
309 | ||
310 | /* Read topology / speed maps and configuration ROM */ | |
311 | static int read_maps(struct hpsb_host *host, int nodeid, quadlet_t *buffer, | |
312 | u64 addr, size_t length, u16 fl) | |
313 | { | |
314 | unsigned long flags; | |
315 | int csraddr = addr - CSR_REGISTER_BASE; | |
316 | const char *src; | |
317 | ||
318 | spin_lock_irqsave(&host->csr.lock, flags); | |
319 | ||
320 | if (csraddr < CSR_SPEED_MAP) { | |
321 | src = ((char *)host->csr.topology_map) + csraddr | |
322 | - CSR_TOPOLOGY_MAP; | |
323 | } else { | |
324 | src = ((char *)host->csr.speed_map) + csraddr - CSR_SPEED_MAP; | |
325 | } | |
326 | ||
327 | memcpy(buffer, src, length); | |
328 | spin_unlock_irqrestore(&host->csr.lock, flags); | |
329 | return RCODE_COMPLETE; | |
330 | } | |
331 | ||
332 | ||
333 | #define out if (--length == 0) break | |
334 | ||
335 | static int read_regs(struct hpsb_host *host, int nodeid, quadlet_t *buf, | |
336 | u64 addr, size_t length, u16 flags) | |
337 | { | |
338 | int csraddr = addr - CSR_REGISTER_BASE; | |
339 | int oldcycle; | |
340 | quadlet_t ret; | |
341 | ||
342 | if ((csraddr | length) & 0x3) | |
343 | return RCODE_TYPE_ERROR; | |
344 | ||
345 | length /= 4; | |
346 | ||
347 | switch (csraddr) { | |
348 | case CSR_STATE_CLEAR: | |
349 | *(buf++) = cpu_to_be32(host->csr.state); | |
350 | out; | |
351 | case CSR_STATE_SET: | |
352 | *(buf++) = cpu_to_be32(host->csr.state); | |
353 | out; | |
354 | case CSR_NODE_IDS: | |
355 | *(buf++) = cpu_to_be32(host->csr.node_ids); | |
356 | out; | |
357 | ||
358 | case CSR_RESET_START: | |
359 | return RCODE_TYPE_ERROR; | |
360 | ||
361 | /* address gap - handled by default below */ | |
362 | ||
363 | case CSR_SPLIT_TIMEOUT_HI: | |
364 | *(buf++) = cpu_to_be32(host->csr.split_timeout_hi); | |
365 | out; | |
366 | case CSR_SPLIT_TIMEOUT_LO: | |
367 | *(buf++) = cpu_to_be32(host->csr.split_timeout_lo); | |
368 | out; | |
369 | ||
370 | /* address gap */ | |
371 | return RCODE_ADDRESS_ERROR; | |
372 | ||
373 | case CSR_CYCLE_TIME: | |
374 | oldcycle = host->csr.cycle_time; | |
375 | host->csr.cycle_time = | |
376 | host->driver->devctl(host, GET_CYCLE_COUNTER, 0); | |
377 | ||
378 | if (oldcycle > host->csr.cycle_time) { | |
379 | /* cycle time wrapped around */ | |
380 | host->csr.bus_time += 1 << 7; | |
381 | } | |
382 | *(buf++) = cpu_to_be32(host->csr.cycle_time); | |
383 | out; | |
384 | case CSR_BUS_TIME: | |
385 | oldcycle = host->csr.cycle_time; | |
386 | host->csr.cycle_time = | |
387 | host->driver->devctl(host, GET_CYCLE_COUNTER, 0); | |
388 | ||
389 | if (oldcycle > host->csr.cycle_time) { | |
390 | /* cycle time wrapped around */ | |
391 | host->csr.bus_time += (1 << 7); | |
392 | } | |
393 | *(buf++) = cpu_to_be32(host->csr.bus_time | |
394 | | (host->csr.cycle_time >> 25)); | |
395 | out; | |
396 | ||
397 | /* address gap */ | |
398 | return RCODE_ADDRESS_ERROR; | |
399 | ||
400 | case CSR_BUSY_TIMEOUT: | |
401 | /* not yet implemented */ | |
402 | return RCODE_ADDRESS_ERROR; | |
403 | ||
404 | case CSR_BUS_MANAGER_ID: | |
405 | if (host->driver->hw_csr_reg) | |
406 | ret = host->driver->hw_csr_reg(host, 0, 0, 0); | |
407 | else | |
408 | ret = host->csr.bus_manager_id; | |
409 | ||
410 | *(buf++) = cpu_to_be32(ret); | |
411 | out; | |
412 | case CSR_BANDWIDTH_AVAILABLE: | |
413 | if (host->driver->hw_csr_reg) | |
414 | ret = host->driver->hw_csr_reg(host, 1, 0, 0); | |
415 | else | |
416 | ret = host->csr.bandwidth_available; | |
417 | ||
418 | *(buf++) = cpu_to_be32(ret); | |
419 | out; | |
420 | case CSR_CHANNELS_AVAILABLE_HI: | |
421 | if (host->driver->hw_csr_reg) | |
422 | ret = host->driver->hw_csr_reg(host, 2, 0, 0); | |
423 | else | |
424 | ret = host->csr.channels_available_hi; | |
425 | ||
426 | *(buf++) = cpu_to_be32(ret); | |
427 | out; | |
428 | case CSR_CHANNELS_AVAILABLE_LO: | |
429 | if (host->driver->hw_csr_reg) | |
430 | ret = host->driver->hw_csr_reg(host, 3, 0, 0); | |
431 | else | |
432 | ret = host->csr.channels_available_lo; | |
433 | ||
434 | *(buf++) = cpu_to_be32(ret); | |
435 | out; | |
436 | ||
437 | case CSR_BROADCAST_CHANNEL: | |
438 | *(buf++) = cpu_to_be32(host->csr.broadcast_channel); | |
439 | out; | |
440 | ||
441 | /* address gap to end - fall through to default */ | |
442 | default: | |
443 | return RCODE_ADDRESS_ERROR; | |
444 | } | |
445 | ||
446 | return RCODE_COMPLETE; | |
447 | } | |
448 | ||
449 | static int write_regs(struct hpsb_host *host, int nodeid, int destid, | |
450 | quadlet_t *data, u64 addr, size_t length, u16 flags) | |
451 | { | |
452 | int csraddr = addr - CSR_REGISTER_BASE; | |
453 | ||
454 | if ((csraddr | length) & 0x3) | |
455 | return RCODE_TYPE_ERROR; | |
456 | ||
457 | length /= 4; | |
458 | ||
459 | switch (csraddr) { | |
460 | case CSR_STATE_CLEAR: | |
461 | /* FIXME FIXME FIXME */ | |
462 | printk("doh, someone wants to mess with state clear\n"); | |
463 | out; | |
464 | case CSR_STATE_SET: | |
465 | printk("doh, someone wants to mess with state set\n"); | |
466 | out; | |
467 | ||
468 | case CSR_NODE_IDS: | |
469 | host->csr.node_ids &= NODE_MASK << 16; | |
470 | host->csr.node_ids |= be32_to_cpu(*(data++)) & (BUS_MASK << 16); | |
471 | host->node_id = host->csr.node_ids >> 16; | |
472 | host->driver->devctl(host, SET_BUS_ID, host->node_id >> 6); | |
473 | out; | |
474 | ||
475 | case CSR_RESET_START: | |
476 | /* FIXME - perform command reset */ | |
477 | out; | |
478 | ||
479 | /* address gap */ | |
480 | return RCODE_ADDRESS_ERROR; | |
481 | ||
482 | case CSR_SPLIT_TIMEOUT_HI: | |
483 | host->csr.split_timeout_hi = | |
484 | be32_to_cpu(*(data++)) & 0x00000007; | |
485 | calculate_expire(&host->csr); | |
486 | out; | |
487 | case CSR_SPLIT_TIMEOUT_LO: | |
488 | host->csr.split_timeout_lo = | |
489 | be32_to_cpu(*(data++)) & 0xfff80000; | |
490 | calculate_expire(&host->csr); | |
491 | out; | |
492 | ||
493 | /* address gap */ | |
494 | return RCODE_ADDRESS_ERROR; | |
495 | ||
496 | case CSR_CYCLE_TIME: | |
497 | /* should only be set by cycle start packet, automatically */ | |
498 | host->csr.cycle_time = be32_to_cpu(*data); | |
499 | host->driver->devctl(host, SET_CYCLE_COUNTER, | |
500 | be32_to_cpu(*(data++))); | |
501 | out; | |
502 | case CSR_BUS_TIME: | |
503 | host->csr.bus_time = be32_to_cpu(*(data++)) & 0xffffff80; | |
504 | out; | |
505 | ||
506 | /* address gap */ | |
507 | return RCODE_ADDRESS_ERROR; | |
508 | ||
509 | case CSR_BUSY_TIMEOUT: | |
510 | /* not yet implemented */ | |
511 | return RCODE_ADDRESS_ERROR; | |
512 | ||
513 | case CSR_BUS_MANAGER_ID: | |
514 | case CSR_BANDWIDTH_AVAILABLE: | |
515 | case CSR_CHANNELS_AVAILABLE_HI: | |
516 | case CSR_CHANNELS_AVAILABLE_LO: | |
517 | /* these are not writable, only lockable */ | |
518 | return RCODE_TYPE_ERROR; | |
519 | ||
520 | case CSR_BROADCAST_CHANNEL: | |
521 | /* only the valid bit can be written */ | |
522 | host->csr.broadcast_channel = (host->csr.broadcast_channel & ~0x40000000) | |
523 | | (be32_to_cpu(*data) & 0x40000000); | |
524 | out; | |
525 | ||
526 | /* address gap to end - fall through */ | |
527 | default: | |
528 | return RCODE_ADDRESS_ERROR; | |
529 | } | |
530 | ||
531 | return RCODE_COMPLETE; | |
532 | } | |
533 | ||
534 | #undef out | |
535 | ||
536 | ||
537 | static int lock_regs(struct hpsb_host *host, int nodeid, quadlet_t *store, | |
538 | u64 addr, quadlet_t data, quadlet_t arg, int extcode, u16 fl) | |
539 | { | |
540 | int csraddr = addr - CSR_REGISTER_BASE; | |
541 | unsigned long flags; | |
542 | quadlet_t *regptr = NULL; | |
543 | ||
544 | if (csraddr & 0x3) | |
545 | return RCODE_TYPE_ERROR; | |
546 | ||
547 | if (csraddr < CSR_BUS_MANAGER_ID || csraddr > CSR_CHANNELS_AVAILABLE_LO | |
548 | || extcode != EXTCODE_COMPARE_SWAP) | |
549 | goto unsupported_lockreq; | |
550 | ||
551 | data = be32_to_cpu(data); | |
552 | arg = be32_to_cpu(arg); | |
553 | ||
554 | /* Is somebody releasing the broadcast_channel on us? */ | |
555 | if (csraddr == CSR_CHANNELS_AVAILABLE_HI && (data & 0x1)) { | |
556 | /* Note: this is may not be the right way to handle | |
557 | * the problem, so we should look into the proper way | |
558 | * eventually. */ | |
559 | HPSB_WARN("Node [" NODE_BUS_FMT "] wants to release " | |
560 | "broadcast channel 31. Ignoring.", | |
561 | NODE_BUS_ARGS(host, nodeid)); | |
562 | ||
563 | data &= ~0x1; /* keep broadcast channel allocated */ | |
564 | } | |
565 | ||
566 | if (host->driver->hw_csr_reg) { | |
567 | quadlet_t old; | |
568 | ||
569 | old = host->driver-> | |
570 | hw_csr_reg(host, (csraddr - CSR_BUS_MANAGER_ID) >> 2, | |
571 | data, arg); | |
572 | ||
573 | *store = cpu_to_be32(old); | |
574 | return RCODE_COMPLETE; | |
575 | } | |
576 | ||
577 | spin_lock_irqsave(&host->csr.lock, flags); | |
578 | ||
579 | switch (csraddr) { | |
580 | case CSR_BUS_MANAGER_ID: | |
581 | regptr = &host->csr.bus_manager_id; | |
582 | *store = cpu_to_be32(*regptr); | |
583 | if (*regptr == arg) | |
584 | *regptr = data; | |
585 | break; | |
586 | ||
587 | case CSR_BANDWIDTH_AVAILABLE: | |
588 | { | |
589 | quadlet_t bandwidth; | |
590 | quadlet_t old; | |
591 | quadlet_t new; | |
592 | ||
593 | regptr = &host->csr.bandwidth_available; | |
594 | old = *regptr; | |
595 | ||
596 | /* bandwidth available algorithm adapted from IEEE 1394a-2000 spec */ | |
597 | if (arg > 0x1fff) { | |
598 | *store = cpu_to_be32(old); /* change nothing */ | |
599 | break; | |
600 | } | |
601 | data &= 0x1fff; | |
602 | if (arg >= data) { | |
603 | /* allocate bandwidth */ | |
604 | bandwidth = arg - data; | |
605 | if (old >= bandwidth) { | |
606 | new = old - bandwidth; | |
607 | *store = cpu_to_be32(arg); | |
608 | *regptr = new; | |
609 | } else { | |
610 | *store = cpu_to_be32(old); | |
611 | } | |
612 | } else { | |
613 | /* deallocate bandwidth */ | |
614 | bandwidth = data - arg; | |
615 | if (old + bandwidth < 0x2000) { | |
616 | new = old + bandwidth; | |
617 | *store = cpu_to_be32(arg); | |
618 | *regptr = new; | |
619 | } else { | |
620 | *store = cpu_to_be32(old); | |
621 | } | |
622 | } | |
623 | break; | |
624 | } | |
625 | ||
626 | case CSR_CHANNELS_AVAILABLE_HI: | |
627 | { | |
628 | /* Lock algorithm for CHANNELS_AVAILABLE as recommended by 1394a-2000 */ | |
629 | quadlet_t affected_channels = arg ^ data; | |
630 | ||
631 | regptr = &host->csr.channels_available_hi; | |
632 | ||
633 | if ((arg & affected_channels) == (*regptr & affected_channels)) { | |
634 | *regptr ^= affected_channels; | |
635 | *store = cpu_to_be32(arg); | |
636 | } else { | |
637 | *store = cpu_to_be32(*regptr); | |
638 | } | |
639 | ||
640 | break; | |
641 | } | |
642 | ||
643 | case CSR_CHANNELS_AVAILABLE_LO: | |
644 | { | |
645 | /* Lock algorithm for CHANNELS_AVAILABLE as recommended by 1394a-2000 */ | |
646 | quadlet_t affected_channels = arg ^ data; | |
647 | ||
648 | regptr = &host->csr.channels_available_lo; | |
649 | ||
650 | if ((arg & affected_channels) == (*regptr & affected_channels)) { | |
651 | *regptr ^= affected_channels; | |
652 | *store = cpu_to_be32(arg); | |
653 | } else { | |
654 | *store = cpu_to_be32(*regptr); | |
655 | } | |
656 | break; | |
657 | } | |
658 | } | |
659 | ||
660 | spin_unlock_irqrestore(&host->csr.lock, flags); | |
661 | ||
662 | return RCODE_COMPLETE; | |
663 | ||
664 | unsupported_lockreq: | |
665 | switch (csraddr) { | |
666 | case CSR_STATE_CLEAR: | |
667 | case CSR_STATE_SET: | |
668 | case CSR_RESET_START: | |
669 | case CSR_NODE_IDS: | |
670 | case CSR_SPLIT_TIMEOUT_HI: | |
671 | case CSR_SPLIT_TIMEOUT_LO: | |
672 | case CSR_CYCLE_TIME: | |
673 | case CSR_BUS_TIME: | |
674 | case CSR_BROADCAST_CHANNEL: | |
675 | return RCODE_TYPE_ERROR; | |
676 | ||
677 | case CSR_BUSY_TIMEOUT: | |
678 | /* not yet implemented - fall through */ | |
679 | default: | |
680 | return RCODE_ADDRESS_ERROR; | |
681 | } | |
682 | } | |
683 | ||
684 | static int lock64_regs(struct hpsb_host *host, int nodeid, octlet_t * store, | |
685 | u64 addr, octlet_t data, octlet_t arg, int extcode, u16 fl) | |
686 | { | |
687 | int csraddr = addr - CSR_REGISTER_BASE; | |
688 | unsigned long flags; | |
689 | ||
690 | data = be64_to_cpu(data); | |
691 | arg = be64_to_cpu(arg); | |
692 | ||
693 | if (csraddr & 0x3) | |
694 | return RCODE_TYPE_ERROR; | |
695 | ||
696 | if (csraddr != CSR_CHANNELS_AVAILABLE | |
697 | || extcode != EXTCODE_COMPARE_SWAP) | |
698 | goto unsupported_lock64req; | |
699 | ||
700 | /* Is somebody releasing the broadcast_channel on us? */ | |
701 | if (csraddr == CSR_CHANNELS_AVAILABLE_HI && (data & 0x100000000ULL)) { | |
702 | /* Note: this is may not be the right way to handle | |
703 | * the problem, so we should look into the proper way | |
704 | * eventually. */ | |
705 | HPSB_WARN("Node [" NODE_BUS_FMT "] wants to release " | |
706 | "broadcast channel 31. Ignoring.", | |
707 | NODE_BUS_ARGS(host, nodeid)); | |
708 | ||
709 | data &= ~0x100000000ULL; /* keep broadcast channel allocated */ | |
710 | } | |
711 | ||
712 | if (host->driver->hw_csr_reg) { | |
713 | quadlet_t data_hi, data_lo; | |
714 | quadlet_t arg_hi, arg_lo; | |
715 | quadlet_t old_hi, old_lo; | |
716 | ||
717 | data_hi = data >> 32; | |
718 | data_lo = data & 0xFFFFFFFF; | |
719 | arg_hi = arg >> 32; | |
720 | arg_lo = arg & 0xFFFFFFFF; | |
721 | ||
722 | old_hi = host->driver->hw_csr_reg(host, (csraddr - CSR_BUS_MANAGER_ID) >> 2, | |
723 | data_hi, arg_hi); | |
724 | ||
725 | old_lo = host->driver->hw_csr_reg(host, ((csraddr + 4) - CSR_BUS_MANAGER_ID) >> 2, | |
726 | data_lo, arg_lo); | |
727 | ||
728 | *store = cpu_to_be64(((octlet_t)old_hi << 32) | old_lo); | |
729 | } else { | |
730 | octlet_t old; | |
731 | octlet_t affected_channels = arg ^ data; | |
732 | ||
733 | spin_lock_irqsave(&host->csr.lock, flags); | |
734 | ||
735 | old = ((octlet_t)host->csr.channels_available_hi << 32) | host->csr.channels_available_lo; | |
736 | ||
737 | if ((arg & affected_channels) == (old & affected_channels)) { | |
738 | host->csr.channels_available_hi ^= (affected_channels >> 32); | |
739 | host->csr.channels_available_lo ^= (affected_channels & 0xffffffff); | |
740 | *store = cpu_to_be64(arg); | |
741 | } else { | |
742 | *store = cpu_to_be64(old); | |
743 | } | |
744 | ||
745 | spin_unlock_irqrestore(&host->csr.lock, flags); | |
746 | } | |
747 | ||
748 | /* Is somebody erroneously releasing the broadcast_channel on us? */ | |
749 | if (host->csr.channels_available_hi & 0x1) | |
750 | host->csr.channels_available_hi &= ~0x1; | |
751 | ||
752 | return RCODE_COMPLETE; | |
753 | ||
754 | unsupported_lock64req: | |
755 | switch (csraddr) { | |
756 | case CSR_STATE_CLEAR: | |
757 | case CSR_STATE_SET: | |
758 | case CSR_RESET_START: | |
759 | case CSR_NODE_IDS: | |
760 | case CSR_SPLIT_TIMEOUT_HI: | |
761 | case CSR_SPLIT_TIMEOUT_LO: | |
762 | case CSR_CYCLE_TIME: | |
763 | case CSR_BUS_TIME: | |
764 | case CSR_BUS_MANAGER_ID: | |
765 | case CSR_BROADCAST_CHANNEL: | |
766 | case CSR_BUSY_TIMEOUT: | |
767 | case CSR_BANDWIDTH_AVAILABLE: | |
768 | return RCODE_TYPE_ERROR; | |
769 | ||
770 | default: | |
771 | return RCODE_ADDRESS_ERROR; | |
772 | } | |
773 | } | |
774 | ||
775 | static int write_fcp(struct hpsb_host *host, int nodeid, int dest, | |
776 | quadlet_t *data, u64 addr, size_t length, u16 flags) | |
777 | { | |
778 | int csraddr = addr - CSR_REGISTER_BASE; | |
779 | ||
780 | if (length > 512) | |
781 | return RCODE_TYPE_ERROR; | |
782 | ||
783 | switch (csraddr) { | |
784 | case CSR_FCP_COMMAND: | |
785 | highlevel_fcp_request(host, nodeid, 0, (u8 *)data, length); | |
786 | break; | |
787 | case CSR_FCP_RESPONSE: | |
788 | highlevel_fcp_request(host, nodeid, 1, (u8 *)data, length); | |
789 | break; | |
790 | default: | |
791 | return RCODE_TYPE_ERROR; | |
792 | } | |
793 | ||
794 | return RCODE_COMPLETE; | |
795 | } | |
796 | ||
797 | static int read_config_rom(struct hpsb_host *host, int nodeid, quadlet_t *buffer, | |
798 | u64 addr, size_t length, u16 fl) | |
799 | { | |
800 | u32 offset = addr - CSR1212_REGISTER_SPACE_BASE; | |
801 | ||
802 | if (csr1212_read(host->csr.rom, offset, buffer, length) == CSR1212_SUCCESS) | |
803 | return RCODE_COMPLETE; | |
804 | else | |
805 | return RCODE_ADDRESS_ERROR; | |
806 | } | |
807 | ||
808 | static u64 allocate_addr_range(u64 size, u32 alignment, void *__host) | |
809 | { | |
810 | struct hpsb_host *host = (struct hpsb_host*)__host; | |
811 | ||
812 | return hpsb_allocate_and_register_addrspace(&csr_highlevel, | |
813 | host, | |
814 | &config_rom_ops, | |
815 | size, alignment, | |
816 | CSR1212_UNITS_SPACE_BASE, | |
817 | CSR1212_UNITS_SPACE_END); | |
818 | } | |
819 | ||
820 | static void release_addr_range(u64 addr, void *__host) | |
821 | { | |
822 | struct hpsb_host *host = (struct hpsb_host*)__host; | |
823 | hpsb_unregister_addrspace(&csr_highlevel, host, addr); | |
824 | } | |
825 | ||
826 | ||
827 | int init_csr(void) | |
828 | { | |
829 | node_cap = csr1212_new_immediate(CSR1212_KV_ID_NODE_CAPABILITIES, 0x0083c0); | |
830 | if (!node_cap) { | |
831 | HPSB_ERR("Failed to allocate memory for Node Capabilties ConfigROM entry!"); | |
832 | return -ENOMEM; | |
833 | } | |
834 | ||
835 | hpsb_register_highlevel(&csr_highlevel); | |
836 | ||
837 | return 0; | |
838 | } | |
839 | ||
840 | void cleanup_csr(void) | |
841 | { | |
842 | if (node_cap) | |
843 | csr1212_release_keyval(node_cap); | |
844 | hpsb_unregister_highlevel(&csr_highlevel); | |
845 | } |