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