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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 | ||
30 | #include <linux/config.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/mm.h> | |
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 | ||
54 | #define DEBUG_TASKFILE 0 /* unset when fixed */ | |
55 | ||
56 | static void ata_bswap_data (void *buffer, int wcount) | |
57 | { | |
58 | u16 *p = buffer; | |
59 | ||
60 | while (wcount--) { | |
61 | *p = *p << 8 | *p >> 8; p++; | |
62 | *p = *p << 8 | *p >> 8; p++; | |
63 | } | |
64 | } | |
65 | ||
66 | static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
67 | { | |
68 | HWIF(drive)->ata_input_data(drive, buffer, wcount); | |
69 | if (drive->bswap) | |
70 | ata_bswap_data(buffer, wcount); | |
71 | } | |
72 | ||
73 | static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
74 | { | |
75 | if (drive->bswap) { | |
76 | ata_bswap_data(buffer, wcount); | |
77 | HWIF(drive)->ata_output_data(drive, buffer, wcount); | |
78 | ata_bswap_data(buffer, wcount); | |
79 | } else { | |
80 | HWIF(drive)->ata_output_data(drive, buffer, wcount); | |
81 | } | |
82 | } | |
83 | ||
84 | int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) | |
85 | { | |
86 | ide_task_t args; | |
87 | memset(&args, 0, sizeof(ide_task_t)); | |
88 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
89 | if (drive->media == ide_disk) | |
90 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY; | |
91 | else | |
92 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY; | |
93 | args.command_type = IDE_DRIVE_TASK_IN; | |
94 | args.data_phase = TASKFILE_IN; | |
95 | args.handler = &task_in_intr; | |
96 | return ide_raw_taskfile(drive, &args, buf); | |
97 | } | |
98 | ||
99 | ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) | |
100 | { | |
101 | ide_hwif_t *hwif = HWIF(drive); | |
102 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; | |
103 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; | |
104 | u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF; | |
105 | ||
106 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ | |
107 | if (IDE_CONTROL_REG) { | |
108 | /* clear nIEN */ | |
109 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
110 | } | |
111 | SELECT_MASK(drive, 0); | |
112 | ||
113 | if (drive->addressing == 1) { | |
114 | hwif->OUTB(hobfile->feature, IDE_FEATURE_REG); | |
115 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); | |
116 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); | |
117 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); | |
118 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); | |
119 | } | |
120 | ||
121 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); | |
122 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); | |
123 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); | |
124 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); | |
125 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); | |
126 | ||
127 | hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG); | |
128 | ||
129 | if (task->handler != NULL) { | |
130 | if (task->prehandler != NULL) { | |
131 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); | |
132 | ndelay(400); /* FIXME */ | |
133 | return task->prehandler(drive, task->rq); | |
134 | } | |
135 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); | |
136 | return ide_started; | |
137 | } | |
138 | ||
139 | if (!drive->using_dma) | |
140 | return ide_stopped; | |
141 | ||
142 | switch (taskfile->command) { | |
143 | case WIN_WRITEDMA_ONCE: | |
144 | case WIN_WRITEDMA: | |
145 | case WIN_WRITEDMA_EXT: | |
146 | case WIN_READDMA_ONCE: | |
147 | case WIN_READDMA: | |
148 | case WIN_READDMA_EXT: | |
149 | case WIN_IDENTIFY_DMA: | |
150 | if (!hwif->dma_setup(drive)) { | |
151 | hwif->dma_exec_cmd(drive, taskfile->command); | |
152 | hwif->dma_start(drive); | |
153 | return ide_started; | |
154 | } | |
155 | break; | |
156 | default: | |
157 | if (task->handler == NULL) | |
158 | return ide_stopped; | |
159 | } | |
160 | ||
161 | return ide_stopped; | |
162 | } | |
163 | ||
164 | EXPORT_SYMBOL(do_rw_taskfile); | |
165 | ||
166 | /* | |
167 | * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. | |
168 | */ | |
169 | ide_startstop_t set_multmode_intr (ide_drive_t *drive) | |
170 | { | |
171 | ide_hwif_t *hwif = HWIF(drive); | |
172 | u8 stat; | |
173 | ||
174 | if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { | |
175 | drive->mult_count = drive->mult_req; | |
176 | } else { | |
177 | drive->mult_req = drive->mult_count = 0; | |
178 | drive->special.b.recalibrate = 1; | |
179 | (void) ide_dump_status(drive, "set_multmode", stat); | |
180 | } | |
181 | return ide_stopped; | |
182 | } | |
183 | ||
184 | /* | |
185 | * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. | |
186 | */ | |
187 | ide_startstop_t set_geometry_intr (ide_drive_t *drive) | |
188 | { | |
189 | ide_hwif_t *hwif = HWIF(drive); | |
190 | int retries = 5; | |
191 | u8 stat; | |
192 | ||
193 | while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) | |
194 | udelay(10); | |
195 | ||
196 | if (OK_STAT(stat, READY_STAT, BAD_STAT)) | |
197 | return ide_stopped; | |
198 | ||
199 | if (stat & (ERR_STAT|DRQ_STAT)) | |
200 | return ide_error(drive, "set_geometry_intr", stat); | |
201 | ||
202 | if (HWGROUP(drive)->handler != NULL) | |
203 | BUG(); | |
204 | ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); | |
205 | return ide_started; | |
206 | } | |
207 | ||
208 | /* | |
209 | * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. | |
210 | */ | |
211 | ide_startstop_t recal_intr (ide_drive_t *drive) | |
212 | { | |
213 | ide_hwif_t *hwif = HWIF(drive); | |
214 | u8 stat; | |
215 | ||
216 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) | |
217 | return ide_error(drive, "recal_intr", stat); | |
218 | return ide_stopped; | |
219 | } | |
220 | ||
221 | /* | |
222 | * Handler for commands without a data phase | |
223 | */ | |
224 | ide_startstop_t task_no_data_intr (ide_drive_t *drive) | |
225 | { | |
226 | ide_task_t *args = HWGROUP(drive)->rq->special; | |
227 | ide_hwif_t *hwif = HWIF(drive); | |
228 | u8 stat; | |
229 | ||
230 | local_irq_enable(); | |
231 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { | |
232 | return ide_error(drive, "task_no_data_intr", stat); | |
233 | /* calls ide_end_drive_cmd */ | |
234 | } | |
235 | if (args) | |
236 | ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); | |
237 | ||
238 | return ide_stopped; | |
239 | } | |
240 | ||
241 | EXPORT_SYMBOL(task_no_data_intr); | |
242 | ||
243 | static u8 wait_drive_not_busy(ide_drive_t *drive) | |
244 | { | |
245 | ide_hwif_t *hwif = HWIF(drive); | |
246 | int retries = 100; | |
247 | u8 stat; | |
248 | ||
249 | /* | |
250 | * Last sector was transfered, wait until drive is ready. | |
251 | * This can take up to 10 usec, but we will wait max 1 ms | |
252 | * (drive_cmd_intr() waits that long). | |
253 | */ | |
254 | while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) | |
255 | udelay(10); | |
256 | ||
257 | if (!retries) | |
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; | |
267 | struct page *page; | |
268 | #ifdef CONFIG_HIGHMEM | |
269 | unsigned long flags; | |
270 | #endif | |
271 | unsigned int offset; | |
272 | u8 *buf; | |
273 | ||
274 | page = sg[hwif->cursg].page; | |
275 | offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE; | |
276 | ||
277 | /* get the current page and offset */ | |
278 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
279 | offset %= PAGE_SIZE; | |
280 | ||
281 | #ifdef CONFIG_HIGHMEM | |
282 | local_irq_save(flags); | |
283 | #endif | |
284 | buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; | |
285 | ||
286 | hwif->nleft--; | |
287 | hwif->cursg_ofs++; | |
288 | ||
289 | if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) { | |
290 | hwif->cursg++; | |
291 | hwif->cursg_ofs = 0; | |
292 | } | |
293 | ||
294 | /* do the actual data transfer */ | |
295 | if (write) | |
296 | taskfile_output_data(drive, buf, SECTOR_WORDS); | |
297 | else | |
298 | taskfile_input_data(drive, buf, SECTOR_WORDS); | |
299 | ||
300 | kunmap_atomic(buf, KM_BIO_SRC_IRQ); | |
301 | #ifdef CONFIG_HIGHMEM | |
302 | local_irq_restore(flags); | |
303 | #endif | |
304 | } | |
305 | ||
306 | static void ide_pio_multi(ide_drive_t *drive, unsigned int write) | |
307 | { | |
308 | unsigned int nsect; | |
309 | ||
310 | nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); | |
311 | while (nsect--) | |
312 | ide_pio_sector(drive, write); | |
313 | } | |
314 | ||
315 | static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq, | |
316 | unsigned int write) | |
317 | { | |
318 | if (rq->bio) /* fs request */ | |
319 | rq->errors = 0; | |
320 | ||
321 | switch (drive->hwif->data_phase) { | |
322 | case TASKFILE_MULTI_IN: | |
323 | case TASKFILE_MULTI_OUT: | |
324 | ide_pio_multi(drive, write); | |
325 | break; | |
326 | default: | |
327 | ide_pio_sector(drive, write); | |
328 | break; | |
329 | } | |
330 | } | |
331 | ||
332 | static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, | |
333 | const char *s, u8 stat) | |
334 | { | |
335 | if (rq->bio) { | |
336 | ide_hwif_t *hwif = drive->hwif; | |
337 | int sectors = hwif->nsect - hwif->nleft; | |
338 | ||
339 | switch (hwif->data_phase) { | |
340 | case TASKFILE_IN: | |
341 | if (hwif->nleft) | |
342 | break; | |
343 | /* fall through */ | |
344 | case TASKFILE_OUT: | |
345 | sectors--; | |
346 | break; | |
347 | case TASKFILE_MULTI_IN: | |
348 | if (hwif->nleft) | |
349 | break; | |
350 | /* fall through */ | |
351 | case TASKFILE_MULTI_OUT: | |
352 | sectors -= drive->mult_count; | |
353 | default: | |
354 | break; | |
355 | } | |
356 | ||
357 | if (sectors > 0) { | |
358 | ide_driver_t *drv; | |
359 | ||
360 | drv = *(ide_driver_t **)rq->rq_disk->private_data; | |
361 | drv->end_request(drive, 1, sectors); | |
362 | } | |
363 | } | |
364 | return ide_error(drive, s, stat); | |
365 | } | |
366 | ||
367 | static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) | |
368 | { | |
369 | if (rq->flags & REQ_DRIVE_TASKFILE) { | |
370 | ide_task_t *task = rq->special; | |
371 | ||
372 | if (task->tf_out_flags.all) { | |
373 | u8 err = drive->hwif->INB(IDE_ERROR_REG); | |
374 | ide_end_drive_cmd(drive, stat, err); | |
375 | return; | |
376 | } | |
377 | } | |
378 | ||
379 | ide_end_request(drive, 1, rq->hard_nr_sectors); | |
380 | } | |
381 | ||
382 | /* | |
383 | * Handler for command with PIO data-in phase (Read/Read Multiple). | |
384 | */ | |
385 | ide_startstop_t task_in_intr (ide_drive_t *drive) | |
386 | { | |
387 | ide_hwif_t *hwif = drive->hwif; | |
388 | struct request *rq = HWGROUP(drive)->rq; | |
389 | u8 stat = hwif->INB(IDE_STATUS_REG); | |
390 | ||
391 | /* new way for dealing with premature shared PCI interrupts */ | |
392 | if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) { | |
393 | if (stat & (ERR_STAT | DRQ_STAT)) | |
394 | return task_error(drive, rq, __FUNCTION__, stat); | |
395 | /* No data yet, so wait for another IRQ. */ | |
396 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); | |
397 | return ide_started; | |
398 | } | |
399 | ||
400 | ide_pio_datablock(drive, rq, 0); | |
401 | ||
402 | /* If it was the last datablock check status and finish transfer. */ | |
403 | if (!hwif->nleft) { | |
404 | stat = wait_drive_not_busy(drive); | |
405 | if (!OK_STAT(stat, 0, BAD_R_STAT)) | |
406 | return task_error(drive, rq, __FUNCTION__, stat); | |
407 | task_end_request(drive, rq, stat); | |
408 | return ide_stopped; | |
409 | } | |
410 | ||
411 | /* Still data left to transfer. */ | |
412 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); | |
413 | ||
414 | return ide_started; | |
415 | } | |
416 | EXPORT_SYMBOL(task_in_intr); | |
417 | ||
418 | /* | |
419 | * Handler for command with PIO data-out phase (Write/Write Multiple). | |
420 | */ | |
421 | static ide_startstop_t task_out_intr (ide_drive_t *drive) | |
422 | { | |
423 | ide_hwif_t *hwif = drive->hwif; | |
424 | struct request *rq = HWGROUP(drive)->rq; | |
425 | u8 stat = hwif->INB(IDE_STATUS_REG); | |
426 | ||
427 | if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) | |
428 | return task_error(drive, rq, __FUNCTION__, stat); | |
429 | ||
430 | /* Deal with unexpected ATA data phase. */ | |
431 | if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) | |
432 | return task_error(drive, rq, __FUNCTION__, stat); | |
433 | ||
434 | if (!hwif->nleft) { | |
435 | task_end_request(drive, rq, stat); | |
436 | return ide_stopped; | |
437 | } | |
438 | ||
439 | /* Still data left to transfer. */ | |
440 | ide_pio_datablock(drive, rq, 1); | |
441 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); | |
442 | ||
443 | return ide_started; | |
444 | } | |
445 | ||
446 | ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq) | |
447 | { | |
448 | ide_startstop_t startstop; | |
449 | ||
450 | if (ide_wait_stat(&startstop, drive, DATA_READY, | |
451 | drive->bad_wstat, WAIT_DRQ)) { | |
452 | printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", | |
453 | drive->name, | |
454 | drive->hwif->data_phase ? "MULT" : "", | |
455 | drive->addressing ? "_EXT" : ""); | |
456 | return startstop; | |
457 | } | |
458 | ||
459 | if (!drive->unmask) | |
460 | local_irq_disable(); | |
461 | ||
462 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); | |
463 | ide_pio_datablock(drive, rq, 1); | |
464 | ||
465 | return ide_started; | |
466 | } | |
467 | EXPORT_SYMBOL(pre_task_out_intr); | |
468 | ||
469 | static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf) | |
470 | { | |
471 | struct request rq; | |
472 | ||
473 | memset(&rq, 0, sizeof(rq)); | |
474 | rq.flags = REQ_DRIVE_TASKFILE; | |
475 | rq.buffer = buf; | |
476 | ||
477 | /* | |
478 | * (ks) We transfer currently only whole sectors. | |
479 | * This is suffient for now. But, it would be great, | |
480 | * if we would find a solution to transfer any size. | |
481 | * To support special commands like READ LONG. | |
482 | */ | |
483 | if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { | |
484 | if (data_size == 0) | |
485 | rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET]; | |
486 | else | |
487 | rq.nr_sectors = data_size / SECTOR_SIZE; | |
488 | ||
489 | if (!rq.nr_sectors) { | |
490 | printk(KERN_ERR "%s: in/out command without data\n", | |
491 | drive->name); | |
492 | return -EFAULT; | |
493 | } | |
494 | ||
495 | rq.hard_nr_sectors = rq.nr_sectors; | |
496 | rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; | |
497 | ||
498 | if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) | |
499 | rq.flags |= REQ_RW; | |
500 | } | |
501 | ||
502 | rq.special = args; | |
503 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
504 | } | |
505 | ||
506 | int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf) | |
507 | { | |
508 | return ide_diag_taskfile(drive, args, 0, buf); | |
509 | } | |
510 | ||
511 | EXPORT_SYMBOL(ide_raw_taskfile); | |
512 | ||
513 | int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
514 | { | |
515 | ide_task_request_t *req_task; | |
516 | ide_task_t args; | |
517 | u8 *outbuf = NULL; | |
518 | u8 *inbuf = NULL; | |
519 | task_ioreg_t *argsptr = args.tfRegister; | |
520 | task_ioreg_t *hobsptr = args.hobRegister; | |
521 | int err = 0; | |
522 | int tasksize = sizeof(struct ide_task_request_s); | |
523 | int taskin = 0; | |
524 | int taskout = 0; | |
525 | u8 io_32bit = drive->io_32bit; | |
526 | char __user *buf = (char __user *)arg; | |
527 | ||
528 | // printk("IDE Taskfile ...\n"); | |
529 | ||
530 | req_task = kmalloc(tasksize, GFP_KERNEL); | |
531 | if (req_task == NULL) return -ENOMEM; | |
532 | memset(req_task, 0, tasksize); | |
533 | if (copy_from_user(req_task, buf, tasksize)) { | |
534 | kfree(req_task); | |
535 | return -EFAULT; | |
536 | } | |
537 | ||
538 | taskout = (int) req_task->out_size; | |
539 | taskin = (int) req_task->in_size; | |
540 | ||
541 | if (taskout) { | |
542 | int outtotal = tasksize; | |
543 | outbuf = kmalloc(taskout, GFP_KERNEL); | |
544 | if (outbuf == NULL) { | |
545 | err = -ENOMEM; | |
546 | goto abort; | |
547 | } | |
548 | memset(outbuf, 0, taskout); | |
549 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { | |
550 | err = -EFAULT; | |
551 | goto abort; | |
552 | } | |
553 | } | |
554 | ||
555 | if (taskin) { | |
556 | int intotal = tasksize + taskout; | |
557 | inbuf = kmalloc(taskin, GFP_KERNEL); | |
558 | if (inbuf == NULL) { | |
559 | err = -ENOMEM; | |
560 | goto abort; | |
561 | } | |
562 | memset(inbuf, 0, taskin); | |
563 | if (copy_from_user(inbuf, buf + intotal, taskin)) { | |
564 | err = -EFAULT; | |
565 | goto abort; | |
566 | } | |
567 | } | |
568 | ||
569 | memset(&args, 0, sizeof(ide_task_t)); | |
570 | memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); | |
571 | memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE); | |
572 | ||
573 | args.tf_in_flags = req_task->in_flags; | |
574 | args.tf_out_flags = req_task->out_flags; | |
575 | args.data_phase = req_task->data_phase; | |
576 | args.command_type = req_task->req_cmd; | |
577 | ||
578 | drive->io_32bit = 0; | |
579 | switch(req_task->data_phase) { | |
580 | case TASKFILE_OUT_DMAQ: | |
581 | case TASKFILE_OUT_DMA: | |
582 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); | |
583 | break; | |
584 | case TASKFILE_IN_DMAQ: | |
585 | case TASKFILE_IN_DMA: | |
586 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); | |
587 | break; | |
588 | case TASKFILE_MULTI_OUT: | |
589 | if (!drive->mult_count) { | |
590 | /* (hs): give up if multcount is not set */ | |
591 | printk(KERN_ERR "%s: %s Multimode Write " \ | |
592 | "multcount is not set\n", | |
593 | drive->name, __FUNCTION__); | |
594 | err = -EPERM; | |
595 | goto abort; | |
596 | } | |
597 | /* fall through */ | |
598 | case TASKFILE_OUT: | |
599 | args.prehandler = &pre_task_out_intr; | |
600 | args.handler = &task_out_intr; | |
601 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); | |
602 | break; | |
603 | case TASKFILE_MULTI_IN: | |
604 | if (!drive->mult_count) { | |
605 | /* (hs): give up if multcount is not set */ | |
606 | printk(KERN_ERR "%s: %s Multimode Read failure " \ | |
607 | "multcount is not set\n", | |
608 | drive->name, __FUNCTION__); | |
609 | err = -EPERM; | |
610 | goto abort; | |
611 | } | |
612 | /* fall through */ | |
613 | case TASKFILE_IN: | |
614 | args.handler = &task_in_intr; | |
615 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); | |
616 | break; | |
617 | case TASKFILE_NO_DATA: | |
618 | args.handler = &task_no_data_intr; | |
619 | err = ide_diag_taskfile(drive, &args, 0, NULL); | |
620 | break; | |
621 | default: | |
622 | err = -EFAULT; | |
623 | goto abort; | |
624 | } | |
625 | ||
626 | memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE); | |
627 | memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE); | |
628 | req_task->in_flags = args.tf_in_flags; | |
629 | req_task->out_flags = args.tf_out_flags; | |
630 | ||
631 | if (copy_to_user(buf, req_task, tasksize)) { | |
632 | err = -EFAULT; | |
633 | goto abort; | |
634 | } | |
635 | if (taskout) { | |
636 | int outtotal = tasksize; | |
637 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { | |
638 | err = -EFAULT; | |
639 | goto abort; | |
640 | } | |
641 | } | |
642 | if (taskin) { | |
643 | int intotal = tasksize + taskout; | |
644 | if (copy_to_user(buf + intotal, inbuf, taskin)) { | |
645 | err = -EFAULT; | |
646 | goto abort; | |
647 | } | |
648 | } | |
649 | abort: | |
650 | kfree(req_task); | |
651 | if (outbuf != NULL) | |
652 | kfree(outbuf); | |
653 | if (inbuf != NULL) | |
654 | kfree(inbuf); | |
655 | ||
656 | // printk("IDE Taskfile ioctl ended. rc = %i\n", err); | |
657 | ||
658 | drive->io_32bit = io_32bit; | |
659 | ||
660 | return err; | |
661 | } | |
662 | ||
663 | int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) | |
664 | { | |
665 | struct request rq; | |
666 | u8 buffer[4]; | |
667 | ||
668 | if (!buf) | |
669 | buf = buffer; | |
670 | memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors); | |
671 | ide_init_drive_cmd(&rq); | |
672 | rq.buffer = buf; | |
673 | *buf++ = cmd; | |
674 | *buf++ = nsect; | |
675 | *buf++ = feature; | |
676 | *buf++ = sectors; | |
677 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
678 | } | |
679 | ||
680 | /* | |
681 | * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> | |
682 | */ | |
683 | int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
684 | { | |
685 | int err = 0; | |
686 | u8 args[4], *argbuf = args; | |
687 | u8 xfer_rate = 0; | |
688 | int argsize = 4; | |
689 | ide_task_t tfargs; | |
690 | ||
691 | if (NULL == (void *) arg) { | |
692 | struct request rq; | |
693 | ide_init_drive_cmd(&rq); | |
694 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
695 | } | |
696 | ||
697 | if (copy_from_user(args, (void __user *)arg, 4)) | |
698 | return -EFAULT; | |
699 | ||
700 | memset(&tfargs, 0, sizeof(ide_task_t)); | |
701 | tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2]; | |
702 | tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3]; | |
703 | tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1]; | |
704 | tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00; | |
705 | tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00; | |
706 | tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00; | |
707 | tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0]; | |
708 | ||
709 | if (args[3]) { | |
710 | argsize = 4 + (SECTOR_WORDS * 4 * args[3]); | |
711 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
712 | if (argbuf == NULL) | |
713 | return -ENOMEM; | |
714 | memcpy(argbuf, args, 4); | |
715 | } | |
716 | if (set_transfer(drive, &tfargs)) { | |
717 | xfer_rate = args[1]; | |
718 | if (ide_ata66_check(drive, &tfargs)) | |
719 | goto abort; | |
720 | } | |
721 | ||
722 | err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf); | |
723 | ||
724 | if (!err && xfer_rate) { | |
725 | /* active-retuning-calls future */ | |
726 | ide_set_xfer_rate(drive, xfer_rate); | |
727 | ide_driveid_update(drive); | |
728 | } | |
729 | abort: | |
730 | if (copy_to_user((void __user *)arg, argbuf, argsize)) | |
731 | err = -EFAULT; | |
732 | if (argsize > 4) | |
733 | kfree(argbuf); | |
734 | return err; | |
735 | } | |
736 | ||
737 | static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf) | |
738 | { | |
739 | struct request rq; | |
740 | ||
741 | ide_init_drive_cmd(&rq); | |
742 | rq.flags = REQ_DRIVE_TASK; | |
743 | rq.buffer = buf; | |
744 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
745 | } | |
746 | ||
747 | /* | |
748 | * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> | |
749 | */ | |
750 | int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
751 | { | |
752 | void __user *p = (void __user *)arg; | |
753 | int err = 0; | |
754 | u8 args[7], *argbuf = args; | |
755 | int argsize = 7; | |
756 | ||
757 | if (copy_from_user(args, p, 7)) | |
758 | return -EFAULT; | |
759 | err = ide_wait_cmd_task(drive, argbuf); | |
760 | if (copy_to_user(p, argbuf, argsize)) | |
761 | err = -EFAULT; | |
762 | return err; | |
763 | } | |
764 | ||
765 | /* | |
766 | * NOTICE: This is additions from IBM to provide a discrete interface, | |
767 | * for selective taskregister access operations. Nice JOB Klaus!!! | |
768 | * Glad to be able to work and co-develop this with you and IBM. | |
769 | */ | |
770 | ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task) | |
771 | { | |
772 | ide_hwif_t *hwif = HWIF(drive); | |
773 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; | |
774 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; | |
775 | #if DEBUG_TASKFILE | |
776 | u8 status; | |
777 | #endif | |
778 | ||
779 | if (task->data_phase == TASKFILE_MULTI_IN || | |
780 | task->data_phase == TASKFILE_MULTI_OUT) { | |
781 | if (!drive->mult_count) { | |
782 | printk(KERN_ERR "%s: multimode not set!\n", drive->name); | |
783 | return ide_stopped; | |
784 | } | |
785 | } | |
786 | ||
787 | /* | |
788 | * (ks) Check taskfile in/out flags. | |
789 | * If set, then execute as it is defined. | |
790 | * If not set, then define default settings. | |
791 | * The default values are: | |
792 | * write and read all taskfile registers (except data) | |
793 | * write and read the hob registers (sector,nsector,lcyl,hcyl) | |
794 | */ | |
795 | if (task->tf_out_flags.all == 0) { | |
796 | task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS; | |
797 | if (drive->addressing == 1) | |
798 | task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8); | |
799 | } | |
800 | ||
801 | if (task->tf_in_flags.all == 0) { | |
802 | task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; | |
803 | if (drive->addressing == 1) | |
804 | task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); | |
805 | } | |
806 | ||
807 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ | |
808 | if (IDE_CONTROL_REG) | |
809 | /* clear nIEN */ | |
810 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
811 | SELECT_MASK(drive, 0); | |
812 | ||
813 | #if DEBUG_TASKFILE | |
814 | status = hwif->INB(IDE_STATUS_REG); | |
815 | if (status & 0x80) { | |
816 | printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status); | |
817 | udelay(100); | |
818 | status = hwif->INB(IDE_STATUS_REG); | |
819 | printk("flagged_taskfile -> Status = %02x\n", status); | |
820 | } | |
821 | #endif | |
822 | ||
823 | if (task->tf_out_flags.b.data) { | |
824 | u16 data = taskfile->data + (hobfile->data << 8); | |
825 | hwif->OUTW(data, IDE_DATA_REG); | |
826 | } | |
827 | ||
828 | /* (ks) send hob registers first */ | |
829 | if (task->tf_out_flags.b.nsector_hob) | |
830 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); | |
831 | if (task->tf_out_flags.b.sector_hob) | |
832 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); | |
833 | if (task->tf_out_flags.b.lcyl_hob) | |
834 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); | |
835 | if (task->tf_out_flags.b.hcyl_hob) | |
836 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); | |
837 | ||
838 | /* (ks) Send now the standard registers */ | |
839 | if (task->tf_out_flags.b.error_feature) | |
840 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); | |
841 | /* refers to number of sectors to transfer */ | |
842 | if (task->tf_out_flags.b.nsector) | |
843 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); | |
844 | /* refers to sector offset or start sector */ | |
845 | if (task->tf_out_flags.b.sector) | |
846 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); | |
847 | if (task->tf_out_flags.b.lcyl) | |
848 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); | |
849 | if (task->tf_out_flags.b.hcyl) | |
850 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); | |
851 | ||
852 | /* | |
853 | * (ks) In the flagged taskfile approch, we will use all specified | |
854 | * registers and the register value will not be changed, except the | |
855 | * select bit (master/slave) in the drive_head register. We must make | |
856 | * sure that the desired drive is selected. | |
857 | */ | |
858 | hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG); | |
859 | switch(task->data_phase) { | |
860 | ||
861 | case TASKFILE_OUT_DMAQ: | |
862 | case TASKFILE_OUT_DMA: | |
863 | case TASKFILE_IN_DMAQ: | |
864 | case TASKFILE_IN_DMA: | |
865 | hwif->dma_setup(drive); | |
866 | hwif->dma_exec_cmd(drive, taskfile->command); | |
867 | hwif->dma_start(drive); | |
868 | break; | |
869 | ||
870 | default: | |
871 | if (task->handler == NULL) | |
872 | return ide_stopped; | |
873 | ||
874 | /* Issue the command */ | |
875 | if (task->prehandler) { | |
876 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); | |
877 | ndelay(400); /* FIXME */ | |
878 | return task->prehandler(drive, task->rq); | |
879 | } | |
880 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); | |
881 | } | |
882 | ||
883 | return ide_started; | |
884 | } |