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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003 | |
3 | * | |
4 | * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org> | |
5 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> | |
6 | * Copyright (C) 2001-2002 Klaus Smolin | |
7 | * IBM Storage Technology Division | |
8 | * Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz | |
9 | * | |
10 | * The big the bad and the ugly. | |
11 | * | |
12 | * Problems to be fixed because of BH interface or the lack therefore. | |
13 | * | |
14 | * Fill me in stupid !!! | |
15 | * | |
16 | * HOST: | |
17 | * General refers to the Controller and Driver "pair". | |
18 | * DATA HANDLER: | |
19 | * Under the context of Linux it generally refers to an interrupt handler. | |
20 | * However, it correctly describes the 'HOST' | |
21 | * DATA BLOCK: | |
22 | * The amount of data needed to be transfered as predefined in the | |
23 | * setup of the device. | |
24 | * STORAGE ATOMIC: | |
25 | * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as | |
26 | * small as a single sector or as large as the entire command block | |
27 | * request. | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/timer.h> | |
35 | #include <linux/mm.h> | |
651c29a1 | 36 | #include <linux/sched.h> |
1da177e4 LT |
37 | #include <linux/interrupt.h> |
38 | #include <linux/major.h> | |
39 | #include <linux/errno.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/blkpg.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/pci.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/hdreg.h> | |
46 | #include <linux/ide.h> | |
47 | #include <linux/bitops.h> | |
55c16a70 | 48 | #include <linux/scatterlist.h> |
1da177e4 LT |
49 | |
50 | #include <asm/byteorder.h> | |
51 | #include <asm/irq.h> | |
52 | #include <asm/uaccess.h> | |
53 | #include <asm/io.h> | |
54 | ||
1da177e4 LT |
55 | static void ata_bswap_data (void *buffer, int wcount) |
56 | { | |
57 | u16 *p = buffer; | |
58 | ||
59 | while (wcount--) { | |
60 | *p = *p << 8 | *p >> 8; p++; | |
61 | *p = *p << 8 | *p >> 8; p++; | |
62 | } | |
63 | } | |
64 | ||
65 | static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
66 | { | |
67 | HWIF(drive)->ata_input_data(drive, buffer, wcount); | |
68 | if (drive->bswap) | |
69 | ata_bswap_data(buffer, wcount); | |
70 | } | |
71 | ||
72 | static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
73 | { | |
74 | if (drive->bswap) { | |
75 | ata_bswap_data(buffer, wcount); | |
76 | HWIF(drive)->ata_output_data(drive, buffer, wcount); | |
77 | ata_bswap_data(buffer, wcount); | |
78 | } else { | |
79 | HWIF(drive)->ata_output_data(drive, buffer, wcount); | |
80 | } | |
81 | } | |
82 | ||
83 | int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) | |
84 | { | |
85 | ide_task_t args; | |
86 | memset(&args, 0, sizeof(ide_task_t)); | |
87 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
88 | if (drive->media == ide_disk) | |
89 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY; | |
90 | else | |
91 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY; | |
92 | args.command_type = IDE_DRIVE_TASK_IN; | |
93 | args.data_phase = TASKFILE_IN; | |
94 | args.handler = &task_in_intr; | |
95 | return ide_raw_taskfile(drive, &args, buf); | |
96 | } | |
97 | ||
98 | ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) | |
99 | { | |
100 | ide_hwif_t *hwif = HWIF(drive); | |
101 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; | |
102 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; | |
103 | u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF; | |
104 | ||
105 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ | |
106 | if (IDE_CONTROL_REG) { | |
107 | /* clear nIEN */ | |
108 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
109 | } | |
110 | SELECT_MASK(drive, 0); | |
111 | ||
112 | if (drive->addressing == 1) { | |
113 | hwif->OUTB(hobfile->feature, IDE_FEATURE_REG); | |
114 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); | |
115 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); | |
116 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); | |
117 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); | |
118 | } | |
119 | ||
120 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); | |
121 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); | |
122 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); | |
123 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); | |
124 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); | |
125 | ||
126 | hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG); | |
127 | ||
128 | if (task->handler != NULL) { | |
129 | if (task->prehandler != NULL) { | |
130 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); | |
131 | ndelay(400); /* FIXME */ | |
132 | return task->prehandler(drive, task->rq); | |
133 | } | |
134 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); | |
135 | return ide_started; | |
136 | } | |
137 | ||
138 | if (!drive->using_dma) | |
139 | return ide_stopped; | |
140 | ||
141 | switch (taskfile->command) { | |
142 | case WIN_WRITEDMA_ONCE: | |
143 | case WIN_WRITEDMA: | |
144 | case WIN_WRITEDMA_EXT: | |
145 | case WIN_READDMA_ONCE: | |
146 | case WIN_READDMA: | |
147 | case WIN_READDMA_EXT: | |
148 | case WIN_IDENTIFY_DMA: | |
149 | if (!hwif->dma_setup(drive)) { | |
150 | hwif->dma_exec_cmd(drive, taskfile->command); | |
151 | hwif->dma_start(drive); | |
152 | return ide_started; | |
153 | } | |
154 | break; | |
155 | default: | |
156 | if (task->handler == NULL) | |
157 | return ide_stopped; | |
158 | } | |
159 | ||
160 | return ide_stopped; | |
161 | } | |
162 | ||
1da177e4 LT |
163 | /* |
164 | * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. | |
165 | */ | |
166 | ide_startstop_t set_multmode_intr (ide_drive_t *drive) | |
167 | { | |
168 | ide_hwif_t *hwif = HWIF(drive); | |
169 | u8 stat; | |
170 | ||
171 | if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { | |
172 | drive->mult_count = drive->mult_req; | |
173 | } else { | |
174 | drive->mult_req = drive->mult_count = 0; | |
175 | drive->special.b.recalibrate = 1; | |
176 | (void) ide_dump_status(drive, "set_multmode", stat); | |
177 | } | |
178 | return ide_stopped; | |
179 | } | |
180 | ||
181 | /* | |
182 | * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. | |
183 | */ | |
184 | ide_startstop_t set_geometry_intr (ide_drive_t *drive) | |
185 | { | |
186 | ide_hwif_t *hwif = HWIF(drive); | |
187 | int retries = 5; | |
188 | u8 stat; | |
189 | ||
190 | while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) | |
191 | udelay(10); | |
192 | ||
193 | if (OK_STAT(stat, READY_STAT, BAD_STAT)) | |
194 | return ide_stopped; | |
195 | ||
196 | if (stat & (ERR_STAT|DRQ_STAT)) | |
197 | return ide_error(drive, "set_geometry_intr", stat); | |
198 | ||
125e1874 | 199 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
200 | ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); |
201 | return ide_started; | |
202 | } | |
203 | ||
204 | /* | |
205 | * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. | |
206 | */ | |
207 | ide_startstop_t recal_intr (ide_drive_t *drive) | |
208 | { | |
209 | ide_hwif_t *hwif = HWIF(drive); | |
210 | u8 stat; | |
211 | ||
212 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) | |
213 | return ide_error(drive, "recal_intr", stat); | |
214 | return ide_stopped; | |
215 | } | |
216 | ||
217 | /* | |
218 | * Handler for commands without a data phase | |
219 | */ | |
220 | ide_startstop_t task_no_data_intr (ide_drive_t *drive) | |
221 | { | |
222 | ide_task_t *args = HWGROUP(drive)->rq->special; | |
223 | ide_hwif_t *hwif = HWIF(drive); | |
224 | u8 stat; | |
225 | ||
366c7f55 | 226 | local_irq_enable_in_hardirq(); |
1da177e4 LT |
227 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { |
228 | return ide_error(drive, "task_no_data_intr", stat); | |
229 | /* calls ide_end_drive_cmd */ | |
230 | } | |
231 | if (args) | |
232 | ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); | |
233 | ||
234 | return ide_stopped; | |
235 | } | |
236 | ||
237 | EXPORT_SYMBOL(task_no_data_intr); | |
238 | ||
239 | static u8 wait_drive_not_busy(ide_drive_t *drive) | |
240 | { | |
241 | ide_hwif_t *hwif = HWIF(drive); | |
b42fa133 | 242 | int retries; |
1da177e4 LT |
243 | u8 stat; |
244 | ||
245 | /* | |
246 | * Last sector was transfered, wait until drive is ready. | |
247 | * This can take up to 10 usec, but we will wait max 1 ms | |
248 | * (drive_cmd_intr() waits that long). | |
249 | */ | |
b42fa133 MY |
250 | for (retries = 0; retries < 100; retries++) { |
251 | if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) | |
252 | udelay(10); | |
253 | else | |
254 | break; | |
255 | } | |
1da177e4 | 256 | |
b42fa133 | 257 | if (stat & BUSY_STAT) |
1da177e4 LT |
258 | printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); |
259 | ||
260 | return stat; | |
261 | } | |
262 | ||
263 | static void ide_pio_sector(ide_drive_t *drive, unsigned int write) | |
264 | { | |
265 | ide_hwif_t *hwif = drive->hwif; | |
266 | struct scatterlist *sg = hwif->sg_table; | |
55c16a70 | 267 | struct scatterlist *cursg = hwif->cursg; |
1da177e4 LT |
268 | struct page *page; |
269 | #ifdef CONFIG_HIGHMEM | |
270 | unsigned long flags; | |
271 | #endif | |
272 | unsigned int offset; | |
273 | u8 *buf; | |
274 | ||
55c16a70 JA |
275 | cursg = hwif->cursg; |
276 | if (!cursg) { | |
277 | cursg = sg; | |
278 | hwif->cursg = sg; | |
279 | } | |
280 | ||
281 | page = cursg->page; | |
282 | offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE; | |
1da177e4 LT |
283 | |
284 | /* get the current page and offset */ | |
285 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
286 | offset %= PAGE_SIZE; | |
287 | ||
288 | #ifdef CONFIG_HIGHMEM | |
289 | local_irq_save(flags); | |
290 | #endif | |
291 | buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; | |
292 | ||
293 | hwif->nleft--; | |
294 | hwif->cursg_ofs++; | |
295 | ||
55c16a70 JA |
296 | if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) { |
297 | hwif->cursg = sg_next(hwif->cursg); | |
1da177e4 LT |
298 | hwif->cursg_ofs = 0; |
299 | } | |
300 | ||
301 | /* do the actual data transfer */ | |
302 | if (write) | |
303 | taskfile_output_data(drive, buf, SECTOR_WORDS); | |
304 | else | |
305 | taskfile_input_data(drive, buf, SECTOR_WORDS); | |
306 | ||
307 | kunmap_atomic(buf, KM_BIO_SRC_IRQ); | |
308 | #ifdef CONFIG_HIGHMEM | |
309 | local_irq_restore(flags); | |
310 | #endif | |
311 | } | |
312 | ||
313 | static void ide_pio_multi(ide_drive_t *drive, unsigned int write) | |
314 | { | |
315 | unsigned int nsect; | |
316 | ||
317 | nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); | |
318 | while (nsect--) | |
319 | ide_pio_sector(drive, write); | |
320 | } | |
321 | ||
858119e1 | 322 | static void ide_pio_datablock(ide_drive_t *drive, struct request *rq, |
1da177e4 LT |
323 | unsigned int write) |
324 | { | |
325 | if (rq->bio) /* fs request */ | |
326 | rq->errors = 0; | |
327 | ||
651c29a1 AM |
328 | touch_softlockup_watchdog(); |
329 | ||
1da177e4 LT |
330 | switch (drive->hwif->data_phase) { |
331 | case TASKFILE_MULTI_IN: | |
332 | case TASKFILE_MULTI_OUT: | |
333 | ide_pio_multi(drive, write); | |
334 | break; | |
335 | default: | |
336 | ide_pio_sector(drive, write); | |
337 | break; | |
338 | } | |
339 | } | |
340 | ||
341 | static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, | |
342 | const char *s, u8 stat) | |
343 | { | |
344 | if (rq->bio) { | |
345 | ide_hwif_t *hwif = drive->hwif; | |
346 | int sectors = hwif->nsect - hwif->nleft; | |
347 | ||
348 | switch (hwif->data_phase) { | |
349 | case TASKFILE_IN: | |
350 | if (hwif->nleft) | |
351 | break; | |
352 | /* fall through */ | |
353 | case TASKFILE_OUT: | |
354 | sectors--; | |
355 | break; | |
356 | case TASKFILE_MULTI_IN: | |
357 | if (hwif->nleft) | |
358 | break; | |
359 | /* fall through */ | |
360 | case TASKFILE_MULTI_OUT: | |
361 | sectors -= drive->mult_count; | |
362 | default: | |
363 | break; | |
364 | } | |
365 | ||
366 | if (sectors > 0) { | |
367 | ide_driver_t *drv; | |
368 | ||
369 | drv = *(ide_driver_t **)rq->rq_disk->private_data; | |
370 | drv->end_request(drive, 1, sectors); | |
371 | } | |
372 | } | |
373 | return ide_error(drive, s, stat); | |
374 | } | |
375 | ||
376 | static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) | |
377 | { | |
55c16a70 JA |
378 | HWIF(drive)->cursg = NULL; |
379 | ||
4aff5e23 | 380 | if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
1da177e4 LT |
381 | ide_task_t *task = rq->special; |
382 | ||
383 | if (task->tf_out_flags.all) { | |
384 | u8 err = drive->hwif->INB(IDE_ERROR_REG); | |
385 | ide_end_drive_cmd(drive, stat, err); | |
386 | return; | |
387 | } | |
388 | } | |
389 | ||
03731fbd RP |
390 | if (rq->rq_disk) { |
391 | ide_driver_t *drv; | |
392 | ||
393 | drv = *(ide_driver_t **)rq->rq_disk->private_data;; | |
394 | drv->end_request(drive, 1, rq->hard_nr_sectors); | |
395 | } else | |
396 | ide_end_request(drive, 1, rq->hard_nr_sectors); | |
1da177e4 LT |
397 | } |
398 | ||
399 | /* | |
400 | * Handler for command with PIO data-in phase (Read/Read Multiple). | |
401 | */ | |
402 | ide_startstop_t task_in_intr (ide_drive_t *drive) | |
403 | { | |
404 | ide_hwif_t *hwif = drive->hwif; | |
405 | struct request *rq = HWGROUP(drive)->rq; | |
406 | u8 stat = hwif->INB(IDE_STATUS_REG); | |
407 | ||
408 | /* new way for dealing with premature shared PCI interrupts */ | |
409 | if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) { | |
410 | if (stat & (ERR_STAT | DRQ_STAT)) | |
411 | return task_error(drive, rq, __FUNCTION__, stat); | |
412 | /* No data yet, so wait for another IRQ. */ | |
413 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); | |
414 | return ide_started; | |
415 | } | |
416 | ||
417 | ide_pio_datablock(drive, rq, 0); | |
418 | ||
419 | /* If it was the last datablock check status and finish transfer. */ | |
420 | if (!hwif->nleft) { | |
421 | stat = wait_drive_not_busy(drive); | |
422 | if (!OK_STAT(stat, 0, BAD_R_STAT)) | |
423 | return task_error(drive, rq, __FUNCTION__, stat); | |
424 | task_end_request(drive, rq, stat); | |
425 | return ide_stopped; | |
426 | } | |
427 | ||
428 | /* Still data left to transfer. */ | |
429 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); | |
430 | ||
431 | return ide_started; | |
432 | } | |
433 | EXPORT_SYMBOL(task_in_intr); | |
434 | ||
435 | /* | |
436 | * Handler for command with PIO data-out phase (Write/Write Multiple). | |
437 | */ | |
438 | static ide_startstop_t task_out_intr (ide_drive_t *drive) | |
439 | { | |
440 | ide_hwif_t *hwif = drive->hwif; | |
441 | struct request *rq = HWGROUP(drive)->rq; | |
442 | u8 stat = hwif->INB(IDE_STATUS_REG); | |
443 | ||
444 | if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) | |
445 | return task_error(drive, rq, __FUNCTION__, stat); | |
446 | ||
447 | /* Deal with unexpected ATA data phase. */ | |
448 | if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) | |
449 | return task_error(drive, rq, __FUNCTION__, stat); | |
450 | ||
451 | if (!hwif->nleft) { | |
452 | task_end_request(drive, rq, stat); | |
453 | return ide_stopped; | |
454 | } | |
455 | ||
456 | /* Still data left to transfer. */ | |
457 | ide_pio_datablock(drive, rq, 1); | |
458 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); | |
459 | ||
460 | return ide_started; | |
461 | } | |
462 | ||
463 | ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq) | |
464 | { | |
465 | ide_startstop_t startstop; | |
466 | ||
467 | if (ide_wait_stat(&startstop, drive, DATA_READY, | |
468 | drive->bad_wstat, WAIT_DRQ)) { | |
469 | printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", | |
470 | drive->name, | |
471 | drive->hwif->data_phase ? "MULT" : "", | |
472 | drive->addressing ? "_EXT" : ""); | |
473 | return startstop; | |
474 | } | |
475 | ||
476 | if (!drive->unmask) | |
477 | local_irq_disable(); | |
478 | ||
479 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); | |
480 | ide_pio_datablock(drive, rq, 1); | |
481 | ||
482 | return ide_started; | |
483 | } | |
484 | EXPORT_SYMBOL(pre_task_out_intr); | |
485 | ||
486 | static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf) | |
487 | { | |
488 | struct request rq; | |
489 | ||
490 | memset(&rq, 0, sizeof(rq)); | |
4aff5e23 | 491 | rq.cmd_type = REQ_TYPE_ATA_TASKFILE; |
1da177e4 LT |
492 | rq.buffer = buf; |
493 | ||
494 | /* | |
495 | * (ks) We transfer currently only whole sectors. | |
496 | * This is suffient for now. But, it would be great, | |
497 | * if we would find a solution to transfer any size. | |
498 | * To support special commands like READ LONG. | |
499 | */ | |
500 | if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { | |
501 | if (data_size == 0) | |
502 | rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET]; | |
503 | else | |
504 | rq.nr_sectors = data_size / SECTOR_SIZE; | |
505 | ||
506 | if (!rq.nr_sectors) { | |
507 | printk(KERN_ERR "%s: in/out command without data\n", | |
508 | drive->name); | |
509 | return -EFAULT; | |
510 | } | |
511 | ||
512 | rq.hard_nr_sectors = rq.nr_sectors; | |
513 | rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; | |
514 | ||
515 | if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) | |
4aff5e23 | 516 | rq.cmd_flags |= REQ_RW; |
1da177e4 LT |
517 | } |
518 | ||
519 | rq.special = args; | |
ef0f6a43 | 520 | args->rq = &rq; |
1da177e4 LT |
521 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
522 | } | |
523 | ||
524 | int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf) | |
525 | { | |
526 | return ide_diag_taskfile(drive, args, 0, buf); | |
527 | } | |
528 | ||
529 | EXPORT_SYMBOL(ide_raw_taskfile); | |
530 | ||
531 | int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
532 | { | |
533 | ide_task_request_t *req_task; | |
534 | ide_task_t args; | |
535 | u8 *outbuf = NULL; | |
536 | u8 *inbuf = NULL; | |
537 | task_ioreg_t *argsptr = args.tfRegister; | |
538 | task_ioreg_t *hobsptr = args.hobRegister; | |
539 | int err = 0; | |
540 | int tasksize = sizeof(struct ide_task_request_s); | |
3a42bb22 AC |
541 | unsigned int taskin = 0; |
542 | unsigned int taskout = 0; | |
1da177e4 LT |
543 | u8 io_32bit = drive->io_32bit; |
544 | char __user *buf = (char __user *)arg; | |
545 | ||
546 | // printk("IDE Taskfile ...\n"); | |
547 | ||
f5e3c2fa | 548 | req_task = kzalloc(tasksize, GFP_KERNEL); |
1da177e4 | 549 | if (req_task == NULL) return -ENOMEM; |
1da177e4 LT |
550 | if (copy_from_user(req_task, buf, tasksize)) { |
551 | kfree(req_task); | |
552 | return -EFAULT; | |
553 | } | |
554 | ||
3a42bb22 AC |
555 | taskout = req_task->out_size; |
556 | taskin = req_task->in_size; | |
557 | ||
558 | if (taskin > 65536 || taskout > 65536) { | |
559 | err = -EINVAL; | |
560 | goto abort; | |
561 | } | |
1da177e4 LT |
562 | |
563 | if (taskout) { | |
564 | int outtotal = tasksize; | |
f5e3c2fa | 565 | outbuf = kzalloc(taskout, GFP_KERNEL); |
1da177e4 LT |
566 | if (outbuf == NULL) { |
567 | err = -ENOMEM; | |
568 | goto abort; | |
569 | } | |
1da177e4 LT |
570 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
571 | err = -EFAULT; | |
572 | goto abort; | |
573 | } | |
574 | } | |
575 | ||
576 | if (taskin) { | |
577 | int intotal = tasksize + taskout; | |
f5e3c2fa | 578 | inbuf = kzalloc(taskin, GFP_KERNEL); |
1da177e4 LT |
579 | if (inbuf == NULL) { |
580 | err = -ENOMEM; | |
581 | goto abort; | |
582 | } | |
1da177e4 LT |
583 | if (copy_from_user(inbuf, buf + intotal, taskin)) { |
584 | err = -EFAULT; | |
585 | goto abort; | |
586 | } | |
587 | } | |
588 | ||
589 | memset(&args, 0, sizeof(ide_task_t)); | |
590 | memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); | |
591 | memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE); | |
592 | ||
593 | args.tf_in_flags = req_task->in_flags; | |
594 | args.tf_out_flags = req_task->out_flags; | |
595 | args.data_phase = req_task->data_phase; | |
596 | args.command_type = req_task->req_cmd; | |
597 | ||
598 | drive->io_32bit = 0; | |
599 | switch(req_task->data_phase) { | |
600 | case TASKFILE_OUT_DMAQ: | |
601 | case TASKFILE_OUT_DMA: | |
602 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); | |
603 | break; | |
604 | case TASKFILE_IN_DMAQ: | |
605 | case TASKFILE_IN_DMA: | |
606 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); | |
607 | break; | |
608 | case TASKFILE_MULTI_OUT: | |
609 | if (!drive->mult_count) { | |
610 | /* (hs): give up if multcount is not set */ | |
611 | printk(KERN_ERR "%s: %s Multimode Write " \ | |
612 | "multcount is not set\n", | |
613 | drive->name, __FUNCTION__); | |
614 | err = -EPERM; | |
615 | goto abort; | |
616 | } | |
617 | /* fall through */ | |
618 | case TASKFILE_OUT: | |
619 | args.prehandler = &pre_task_out_intr; | |
620 | args.handler = &task_out_intr; | |
621 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); | |
622 | break; | |
623 | case TASKFILE_MULTI_IN: | |
624 | if (!drive->mult_count) { | |
625 | /* (hs): give up if multcount is not set */ | |
626 | printk(KERN_ERR "%s: %s Multimode Read failure " \ | |
627 | "multcount is not set\n", | |
628 | drive->name, __FUNCTION__); | |
629 | err = -EPERM; | |
630 | goto abort; | |
631 | } | |
632 | /* fall through */ | |
633 | case TASKFILE_IN: | |
634 | args.handler = &task_in_intr; | |
635 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); | |
636 | break; | |
637 | case TASKFILE_NO_DATA: | |
638 | args.handler = &task_no_data_intr; | |
639 | err = ide_diag_taskfile(drive, &args, 0, NULL); | |
640 | break; | |
641 | default: | |
642 | err = -EFAULT; | |
643 | goto abort; | |
644 | } | |
645 | ||
646 | memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE); | |
647 | memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE); | |
648 | req_task->in_flags = args.tf_in_flags; | |
649 | req_task->out_flags = args.tf_out_flags; | |
650 | ||
651 | if (copy_to_user(buf, req_task, tasksize)) { | |
652 | err = -EFAULT; | |
653 | goto abort; | |
654 | } | |
655 | if (taskout) { | |
656 | int outtotal = tasksize; | |
657 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { | |
658 | err = -EFAULT; | |
659 | goto abort; | |
660 | } | |
661 | } | |
662 | if (taskin) { | |
663 | int intotal = tasksize + taskout; | |
664 | if (copy_to_user(buf + intotal, inbuf, taskin)) { | |
665 | err = -EFAULT; | |
666 | goto abort; | |
667 | } | |
668 | } | |
669 | abort: | |
670 | kfree(req_task); | |
6044ec88 JJ |
671 | kfree(outbuf); |
672 | kfree(inbuf); | |
1da177e4 LT |
673 | |
674 | // printk("IDE Taskfile ioctl ended. rc = %i\n", err); | |
675 | ||
676 | drive->io_32bit = io_32bit; | |
677 | ||
678 | return err; | |
679 | } | |
680 | ||
681 | int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) | |
682 | { | |
683 | struct request rq; | |
684 | u8 buffer[4]; | |
685 | ||
686 | if (!buf) | |
687 | buf = buffer; | |
688 | memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors); | |
689 | ide_init_drive_cmd(&rq); | |
690 | rq.buffer = buf; | |
691 | *buf++ = cmd; | |
692 | *buf++ = nsect; | |
693 | *buf++ = feature; | |
694 | *buf++ = sectors; | |
695 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
696 | } | |
697 | ||
698 | /* | |
699 | * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> | |
700 | */ | |
701 | int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
702 | { | |
703 | int err = 0; | |
704 | u8 args[4], *argbuf = args; | |
705 | u8 xfer_rate = 0; | |
706 | int argsize = 4; | |
707 | ide_task_t tfargs; | |
708 | ||
709 | if (NULL == (void *) arg) { | |
710 | struct request rq; | |
711 | ide_init_drive_cmd(&rq); | |
712 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
713 | } | |
714 | ||
715 | if (copy_from_user(args, (void __user *)arg, 4)) | |
716 | return -EFAULT; | |
717 | ||
718 | memset(&tfargs, 0, sizeof(ide_task_t)); | |
719 | tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2]; | |
720 | tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3]; | |
721 | tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1]; | |
722 | tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00; | |
723 | tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00; | |
724 | tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00; | |
725 | tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0]; | |
726 | ||
727 | if (args[3]) { | |
728 | argsize = 4 + (SECTOR_WORDS * 4 * args[3]); | |
f5e3c2fa | 729 | argbuf = kzalloc(argsize, GFP_KERNEL); |
1da177e4 LT |
730 | if (argbuf == NULL) |
731 | return -ENOMEM; | |
1da177e4 LT |
732 | } |
733 | if (set_transfer(drive, &tfargs)) { | |
734 | xfer_rate = args[1]; | |
735 | if (ide_ata66_check(drive, &tfargs)) | |
736 | goto abort; | |
737 | } | |
738 | ||
739 | err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf); | |
740 | ||
741 | if (!err && xfer_rate) { | |
742 | /* active-retuning-calls future */ | |
743 | ide_set_xfer_rate(drive, xfer_rate); | |
744 | ide_driveid_update(drive); | |
745 | } | |
746 | abort: | |
747 | if (copy_to_user((void __user *)arg, argbuf, argsize)) | |
748 | err = -EFAULT; | |
749 | if (argsize > 4) | |
750 | kfree(argbuf); | |
751 | return err; | |
752 | } | |
753 | ||
754 | static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf) | |
755 | { | |
756 | struct request rq; | |
757 | ||
758 | ide_init_drive_cmd(&rq); | |
4aff5e23 | 759 | rq.cmd_type = REQ_TYPE_ATA_TASK; |
1da177e4 LT |
760 | rq.buffer = buf; |
761 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
762 | } | |
763 | ||
764 | /* | |
765 | * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> | |
766 | */ | |
767 | int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
768 | { | |
769 | void __user *p = (void __user *)arg; | |
770 | int err = 0; | |
771 | u8 args[7], *argbuf = args; | |
772 | int argsize = 7; | |
773 | ||
774 | if (copy_from_user(args, p, 7)) | |
775 | return -EFAULT; | |
776 | err = ide_wait_cmd_task(drive, argbuf); | |
777 | if (copy_to_user(p, argbuf, argsize)) | |
778 | err = -EFAULT; | |
779 | return err; | |
780 | } | |
781 | ||
782 | /* | |
783 | * NOTICE: This is additions from IBM to provide a discrete interface, | |
784 | * for selective taskregister access operations. Nice JOB Klaus!!! | |
785 | * Glad to be able to work and co-develop this with you and IBM. | |
786 | */ | |
787 | ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task) | |
788 | { | |
789 | ide_hwif_t *hwif = HWIF(drive); | |
790 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; | |
791 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; | |
1da177e4 LT |
792 | |
793 | if (task->data_phase == TASKFILE_MULTI_IN || | |
794 | task->data_phase == TASKFILE_MULTI_OUT) { | |
795 | if (!drive->mult_count) { | |
796 | printk(KERN_ERR "%s: multimode not set!\n", drive->name); | |
797 | return ide_stopped; | |
798 | } | |
799 | } | |
800 | ||
801 | /* | |
e07bc709 | 802 | * (ks) Check taskfile in flags. |
1da177e4 LT |
803 | * If set, then execute as it is defined. |
804 | * If not set, then define default settings. | |
805 | * The default values are: | |
e07bc709 BZ |
806 | * read all taskfile registers (except data) |
807 | * read the hob registers (sector, nsector, lcyl, hcyl) | |
1da177e4 | 808 | */ |
1da177e4 LT |
809 | if (task->tf_in_flags.all == 0) { |
810 | task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; | |
811 | if (drive->addressing == 1) | |
812 | task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); | |
813 | } | |
814 | ||
815 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ | |
816 | if (IDE_CONTROL_REG) | |
817 | /* clear nIEN */ | |
818 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
819 | SELECT_MASK(drive, 0); | |
820 | ||
1da177e4 LT |
821 | if (task->tf_out_flags.b.data) { |
822 | u16 data = taskfile->data + (hobfile->data << 8); | |
823 | hwif->OUTW(data, IDE_DATA_REG); | |
824 | } | |
825 | ||
826 | /* (ks) send hob registers first */ | |
827 | if (task->tf_out_flags.b.nsector_hob) | |
828 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); | |
829 | if (task->tf_out_flags.b.sector_hob) | |
830 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); | |
831 | if (task->tf_out_flags.b.lcyl_hob) | |
832 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); | |
833 | if (task->tf_out_flags.b.hcyl_hob) | |
834 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); | |
835 | ||
836 | /* (ks) Send now the standard registers */ | |
837 | if (task->tf_out_flags.b.error_feature) | |
838 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); | |
839 | /* refers to number of sectors to transfer */ | |
840 | if (task->tf_out_flags.b.nsector) | |
841 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); | |
842 | /* refers to sector offset or start sector */ | |
843 | if (task->tf_out_flags.b.sector) | |
844 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); | |
845 | if (task->tf_out_flags.b.lcyl) | |
846 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); | |
847 | if (task->tf_out_flags.b.hcyl) | |
848 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); | |
849 | ||
850 | /* | |
851 | * (ks) In the flagged taskfile approch, we will use all specified | |
852 | * registers and the register value will not be changed, except the | |
853 | * select bit (master/slave) in the drive_head register. We must make | |
854 | * sure that the desired drive is selected. | |
855 | */ | |
856 | hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG); | |
857 | switch(task->data_phase) { | |
858 | ||
859 | case TASKFILE_OUT_DMAQ: | |
860 | case TASKFILE_OUT_DMA: | |
861 | case TASKFILE_IN_DMAQ: | |
862 | case TASKFILE_IN_DMA: | |
863 | hwif->dma_setup(drive); | |
864 | hwif->dma_exec_cmd(drive, taskfile->command); | |
865 | hwif->dma_start(drive); | |
866 | break; | |
867 | ||
868 | default: | |
869 | if (task->handler == NULL) | |
870 | return ide_stopped; | |
871 | ||
872 | /* Issue the command */ | |
873 | if (task->prehandler) { | |
874 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); | |
875 | ndelay(400); /* FIXME */ | |
876 | return task->prehandler(drive, task->rq); | |
877 | } | |
878 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); | |
879 | } | |
880 | ||
881 | return ide_started; | |
882 | } |