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1fdffbce | 1 | /* |
f3a03b09 | 2 | * libata-sff.c - helper library for PCI IDE BMDMA |
1fdffbce JG |
3 | * |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2006 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2006 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
33 | */ | |
34 | ||
1fdffbce | 35 | #include <linux/kernel.h> |
5a0e3ad6 | 36 | #include <linux/gfp.h> |
1fdffbce JG |
37 | #include <linux/pci.h> |
38 | #include <linux/libata.h> | |
624d5c51 | 39 | #include <linux/highmem.h> |
1fdffbce JG |
40 | |
41 | #include "libata.h" | |
42 | ||
624d5c51 TH |
43 | const struct ata_port_operations ata_sff_port_ops = { |
44 | .inherits = &ata_base_port_ops, | |
45 | ||
9363c382 TH |
46 | .qc_prep = ata_sff_qc_prep, |
47 | .qc_issue = ata_sff_qc_issue, | |
4c9bf4e7 | 48 | .qc_fill_rtf = ata_sff_qc_fill_rtf, |
9363c382 TH |
49 | |
50 | .freeze = ata_sff_freeze, | |
51 | .thaw = ata_sff_thaw, | |
0aa1113d | 52 | .prereset = ata_sff_prereset, |
9363c382 | 53 | .softreset = ata_sff_softreset, |
57c9efdf | 54 | .hardreset = sata_sff_hardreset, |
203c75b8 | 55 | .postreset = ata_sff_postreset, |
3d47aa8e | 56 | .drain_fifo = ata_sff_drain_fifo, |
9363c382 TH |
57 | .error_handler = ata_sff_error_handler, |
58 | .post_internal_cmd = ata_sff_post_internal_cmd, | |
59 | ||
5682ed33 TH |
60 | .sff_dev_select = ata_sff_dev_select, |
61 | .sff_check_status = ata_sff_check_status, | |
62 | .sff_tf_load = ata_sff_tf_load, | |
63 | .sff_tf_read = ata_sff_tf_read, | |
64 | .sff_exec_command = ata_sff_exec_command, | |
65 | .sff_data_xfer = ata_sff_data_xfer, | |
288623a0 | 66 | .sff_irq_clear = ata_sff_irq_clear, |
624d5c51 | 67 | |
c96f1732 AC |
68 | .lost_interrupt = ata_sff_lost_interrupt, |
69 | ||
624d5c51 TH |
70 | .port_start = ata_sff_port_start, |
71 | }; | |
0fe40ff8 | 72 | EXPORT_SYMBOL_GPL(ata_sff_port_ops); |
624d5c51 TH |
73 | |
74 | const struct ata_port_operations ata_bmdma_port_ops = { | |
75 | .inherits = &ata_sff_port_ops, | |
76 | ||
9363c382 | 77 | .mode_filter = ata_bmdma_mode_filter, |
624d5c51 TH |
78 | |
79 | .bmdma_setup = ata_bmdma_setup, | |
80 | .bmdma_start = ata_bmdma_start, | |
81 | .bmdma_stop = ata_bmdma_stop, | |
82 | .bmdma_status = ata_bmdma_status, | |
624d5c51 | 83 | }; |
0fe40ff8 | 84 | EXPORT_SYMBOL_GPL(ata_bmdma_port_ops); |
624d5c51 | 85 | |
871af121 AC |
86 | const struct ata_port_operations ata_bmdma32_port_ops = { |
87 | .inherits = &ata_bmdma_port_ops, | |
88 | ||
89 | .sff_data_xfer = ata_sff_data_xfer32, | |
e3cf95dd | 90 | .port_start = ata_sff_port_start32, |
871af121 AC |
91 | }; |
92 | EXPORT_SYMBOL_GPL(ata_bmdma32_port_ops); | |
93 | ||
624d5c51 TH |
94 | /** |
95 | * ata_fill_sg - Fill PCI IDE PRD table | |
96 | * @qc: Metadata associated with taskfile to be transferred | |
97 | * | |
98 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
99 | * associated with the current disk command. | |
100 | * | |
101 | * LOCKING: | |
102 | * spin_lock_irqsave(host lock) | |
103 | * | |
104 | */ | |
105 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
106 | { | |
107 | struct ata_port *ap = qc->ap; | |
108 | struct scatterlist *sg; | |
109 | unsigned int si, pi; | |
110 | ||
111 | pi = 0; | |
112 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
113 | u32 addr, offset; | |
114 | u32 sg_len, len; | |
115 | ||
116 | /* determine if physical DMA addr spans 64K boundary. | |
117 | * Note h/w doesn't support 64-bit, so we unconditionally | |
118 | * truncate dma_addr_t to u32. | |
119 | */ | |
120 | addr = (u32) sg_dma_address(sg); | |
121 | sg_len = sg_dma_len(sg); | |
122 | ||
123 | while (sg_len) { | |
124 | offset = addr & 0xffff; | |
125 | len = sg_len; | |
126 | if ((offset + sg_len) > 0x10000) | |
127 | len = 0x10000 - offset; | |
128 | ||
129 | ap->prd[pi].addr = cpu_to_le32(addr); | |
130 | ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff); | |
131 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); | |
132 | ||
133 | pi++; | |
134 | sg_len -= len; | |
135 | addr += len; | |
136 | } | |
137 | } | |
138 | ||
139 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
140 | } | |
141 | ||
142 | /** | |
143 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
144 | * @qc: Metadata associated with taskfile to be transferred | |
145 | * | |
146 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
147 | * associated with the current disk command. Perform the fill | |
148 | * so that we avoid writing any length 64K records for | |
149 | * controllers that don't follow the spec. | |
150 | * | |
151 | * LOCKING: | |
152 | * spin_lock_irqsave(host lock) | |
153 | * | |
154 | */ | |
155 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
156 | { | |
157 | struct ata_port *ap = qc->ap; | |
158 | struct scatterlist *sg; | |
159 | unsigned int si, pi; | |
160 | ||
161 | pi = 0; | |
162 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
163 | u32 addr, offset; | |
164 | u32 sg_len, len, blen; | |
165 | ||
166 | /* determine if physical DMA addr spans 64K boundary. | |
167 | * Note h/w doesn't support 64-bit, so we unconditionally | |
168 | * truncate dma_addr_t to u32. | |
169 | */ | |
170 | addr = (u32) sg_dma_address(sg); | |
171 | sg_len = sg_dma_len(sg); | |
172 | ||
173 | while (sg_len) { | |
174 | offset = addr & 0xffff; | |
175 | len = sg_len; | |
176 | if ((offset + sg_len) > 0x10000) | |
177 | len = 0x10000 - offset; | |
178 | ||
179 | blen = len & 0xffff; | |
180 | ap->prd[pi].addr = cpu_to_le32(addr); | |
181 | if (blen == 0) { | |
0fe40ff8 AC |
182 | /* Some PATA chipsets like the CS5530 can't |
183 | cope with 0x0000 meaning 64K as the spec | |
184 | says */ | |
624d5c51 TH |
185 | ap->prd[pi].flags_len = cpu_to_le32(0x8000); |
186 | blen = 0x8000; | |
187 | ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000); | |
188 | } | |
189 | ap->prd[pi].flags_len = cpu_to_le32(blen); | |
190 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); | |
191 | ||
192 | pi++; | |
193 | sg_len -= len; | |
194 | addr += len; | |
195 | } | |
196 | } | |
197 | ||
198 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
199 | } | |
200 | ||
201 | /** | |
9363c382 | 202 | * ata_sff_qc_prep - Prepare taskfile for submission |
624d5c51 TH |
203 | * @qc: Metadata associated with taskfile to be prepared |
204 | * | |
205 | * Prepare ATA taskfile for submission. | |
206 | * | |
207 | * LOCKING: | |
208 | * spin_lock_irqsave(host lock) | |
209 | */ | |
9363c382 | 210 | void ata_sff_qc_prep(struct ata_queued_cmd *qc) |
624d5c51 TH |
211 | { |
212 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
213 | return; | |
214 | ||
215 | ata_fill_sg(qc); | |
216 | } | |
0fe40ff8 | 217 | EXPORT_SYMBOL_GPL(ata_sff_qc_prep); |
624d5c51 TH |
218 | |
219 | /** | |
9363c382 | 220 | * ata_sff_dumb_qc_prep - Prepare taskfile for submission |
624d5c51 TH |
221 | * @qc: Metadata associated with taskfile to be prepared |
222 | * | |
223 | * Prepare ATA taskfile for submission. | |
224 | * | |
225 | * LOCKING: | |
226 | * spin_lock_irqsave(host lock) | |
227 | */ | |
9363c382 | 228 | void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc) |
624d5c51 TH |
229 | { |
230 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
231 | return; | |
232 | ||
233 | ata_fill_sg_dumb(qc); | |
234 | } | |
0fe40ff8 | 235 | EXPORT_SYMBOL_GPL(ata_sff_dumb_qc_prep); |
624d5c51 | 236 | |
272f7884 | 237 | /** |
9363c382 | 238 | * ata_sff_check_status - Read device status reg & clear interrupt |
272f7884 TH |
239 | * @ap: port where the device is |
240 | * | |
241 | * Reads ATA taskfile status register for currently-selected device | |
242 | * and return its value. This also clears pending interrupts | |
243 | * from this device | |
244 | * | |
245 | * LOCKING: | |
246 | * Inherited from caller. | |
247 | */ | |
9363c382 | 248 | u8 ata_sff_check_status(struct ata_port *ap) |
272f7884 TH |
249 | { |
250 | return ioread8(ap->ioaddr.status_addr); | |
251 | } | |
0fe40ff8 | 252 | EXPORT_SYMBOL_GPL(ata_sff_check_status); |
272f7884 TH |
253 | |
254 | /** | |
9363c382 | 255 | * ata_sff_altstatus - Read device alternate status reg |
272f7884 TH |
256 | * @ap: port where the device is |
257 | * | |
258 | * Reads ATA taskfile alternate status register for | |
259 | * currently-selected device and return its value. | |
260 | * | |
261 | * Note: may NOT be used as the check_altstatus() entry in | |
262 | * ata_port_operations. | |
263 | * | |
264 | * LOCKING: | |
265 | * Inherited from caller. | |
266 | */ | |
a57c1bad | 267 | static u8 ata_sff_altstatus(struct ata_port *ap) |
624d5c51 | 268 | { |
5682ed33 TH |
269 | if (ap->ops->sff_check_altstatus) |
270 | return ap->ops->sff_check_altstatus(ap); | |
624d5c51 TH |
271 | |
272 | return ioread8(ap->ioaddr.altstatus_addr); | |
273 | } | |
274 | ||
a57c1bad AC |
275 | /** |
276 | * ata_sff_irq_status - Check if the device is busy | |
277 | * @ap: port where the device is | |
278 | * | |
279 | * Determine if the port is currently busy. Uses altstatus | |
280 | * if available in order to avoid clearing shared IRQ status | |
281 | * when finding an IRQ source. Non ctl capable devices don't | |
282 | * share interrupt lines fortunately for us. | |
283 | * | |
284 | * LOCKING: | |
285 | * Inherited from caller. | |
286 | */ | |
287 | static u8 ata_sff_irq_status(struct ata_port *ap) | |
288 | { | |
289 | u8 status; | |
290 | ||
291 | if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) { | |
292 | status = ata_sff_altstatus(ap); | |
293 | /* Not us: We are busy */ | |
294 | if (status & ATA_BUSY) | |
0fe40ff8 | 295 | return status; |
a57c1bad AC |
296 | } |
297 | /* Clear INTRQ latch */ | |
6311c90a | 298 | status = ap->ops->sff_check_status(ap); |
a57c1bad AC |
299 | return status; |
300 | } | |
301 | ||
302 | /** | |
303 | * ata_sff_sync - Flush writes | |
304 | * @ap: Port to wait for. | |
305 | * | |
306 | * CAUTION: | |
307 | * If we have an mmio device with no ctl and no altstatus | |
308 | * method this will fail. No such devices are known to exist. | |
309 | * | |
310 | * LOCKING: | |
311 | * Inherited from caller. | |
312 | */ | |
313 | ||
314 | static void ata_sff_sync(struct ata_port *ap) | |
315 | { | |
316 | if (ap->ops->sff_check_altstatus) | |
317 | ap->ops->sff_check_altstatus(ap); | |
318 | else if (ap->ioaddr.altstatus_addr) | |
319 | ioread8(ap->ioaddr.altstatus_addr); | |
320 | } | |
321 | ||
322 | /** | |
323 | * ata_sff_pause - Flush writes and wait 400nS | |
324 | * @ap: Port to pause for. | |
325 | * | |
326 | * CAUTION: | |
327 | * If we have an mmio device with no ctl and no altstatus | |
328 | * method this will fail. No such devices are known to exist. | |
329 | * | |
330 | * LOCKING: | |
331 | * Inherited from caller. | |
332 | */ | |
333 | ||
334 | void ata_sff_pause(struct ata_port *ap) | |
335 | { | |
336 | ata_sff_sync(ap); | |
337 | ndelay(400); | |
338 | } | |
0fe40ff8 | 339 | EXPORT_SYMBOL_GPL(ata_sff_pause); |
a57c1bad AC |
340 | |
341 | /** | |
342 | * ata_sff_dma_pause - Pause before commencing DMA | |
343 | * @ap: Port to pause for. | |
344 | * | |
345 | * Perform I/O fencing and ensure sufficient cycle delays occur | |
346 | * for the HDMA1:0 transition | |
347 | */ | |
0fe40ff8 | 348 | |
a57c1bad AC |
349 | void ata_sff_dma_pause(struct ata_port *ap) |
350 | { | |
351 | if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) { | |
352 | /* An altstatus read will cause the needed delay without | |
353 | messing up the IRQ status */ | |
354 | ata_sff_altstatus(ap); | |
355 | return; | |
356 | } | |
357 | /* There are no DMA controllers without ctl. BUG here to ensure | |
358 | we never violate the HDMA1:0 transition timing and risk | |
359 | corruption. */ | |
360 | BUG(); | |
361 | } | |
0fe40ff8 | 362 | EXPORT_SYMBOL_GPL(ata_sff_dma_pause); |
a57c1bad | 363 | |
624d5c51 | 364 | /** |
9363c382 | 365 | * ata_sff_busy_sleep - sleep until BSY clears, or timeout |
624d5c51 | 366 | * @ap: port containing status register to be polled |
341c2c95 TH |
367 | * @tmout_pat: impatience timeout in msecs |
368 | * @tmout: overall timeout in msecs | |
624d5c51 TH |
369 | * |
370 | * Sleep until ATA Status register bit BSY clears, | |
371 | * or a timeout occurs. | |
372 | * | |
373 | * LOCKING: | |
374 | * Kernel thread context (may sleep). | |
375 | * | |
376 | * RETURNS: | |
377 | * 0 on success, -errno otherwise. | |
378 | */ | |
9363c382 TH |
379 | int ata_sff_busy_sleep(struct ata_port *ap, |
380 | unsigned long tmout_pat, unsigned long tmout) | |
624d5c51 TH |
381 | { |
382 | unsigned long timer_start, timeout; | |
383 | u8 status; | |
384 | ||
9363c382 | 385 | status = ata_sff_busy_wait(ap, ATA_BUSY, 300); |
624d5c51 | 386 | timer_start = jiffies; |
341c2c95 | 387 | timeout = ata_deadline(timer_start, tmout_pat); |
624d5c51 TH |
388 | while (status != 0xff && (status & ATA_BUSY) && |
389 | time_before(jiffies, timeout)) { | |
390 | msleep(50); | |
9363c382 | 391 | status = ata_sff_busy_wait(ap, ATA_BUSY, 3); |
624d5c51 TH |
392 | } |
393 | ||
394 | if (status != 0xff && (status & ATA_BUSY)) | |
395 | ata_port_printk(ap, KERN_WARNING, | |
396 | "port is slow to respond, please be patient " | |
397 | "(Status 0x%x)\n", status); | |
398 | ||
341c2c95 | 399 | timeout = ata_deadline(timer_start, tmout); |
624d5c51 TH |
400 | while (status != 0xff && (status & ATA_BUSY) && |
401 | time_before(jiffies, timeout)) { | |
402 | msleep(50); | |
5682ed33 | 403 | status = ap->ops->sff_check_status(ap); |
624d5c51 TH |
404 | } |
405 | ||
406 | if (status == 0xff) | |
407 | return -ENODEV; | |
408 | ||
409 | if (status & ATA_BUSY) { | |
410 | ata_port_printk(ap, KERN_ERR, "port failed to respond " | |
411 | "(%lu secs, Status 0x%x)\n", | |
341c2c95 | 412 | DIV_ROUND_UP(tmout, 1000), status); |
624d5c51 TH |
413 | return -EBUSY; |
414 | } | |
415 | ||
416 | return 0; | |
417 | } | |
0fe40ff8 | 418 | EXPORT_SYMBOL_GPL(ata_sff_busy_sleep); |
624d5c51 | 419 | |
aa2731ad TH |
420 | static int ata_sff_check_ready(struct ata_link *link) |
421 | { | |
422 | u8 status = link->ap->ops->sff_check_status(link->ap); | |
423 | ||
78ab88f0 | 424 | return ata_check_ready(status); |
aa2731ad TH |
425 | } |
426 | ||
624d5c51 | 427 | /** |
9363c382 | 428 | * ata_sff_wait_ready - sleep until BSY clears, or timeout |
705e76be | 429 | * @link: SFF link to wait ready status for |
624d5c51 TH |
430 | * @deadline: deadline jiffies for the operation |
431 | * | |
432 | * Sleep until ATA Status register bit BSY clears, or timeout | |
433 | * occurs. | |
434 | * | |
435 | * LOCKING: | |
436 | * Kernel thread context (may sleep). | |
437 | * | |
438 | * RETURNS: | |
439 | * 0 on success, -errno otherwise. | |
440 | */ | |
705e76be | 441 | int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline) |
624d5c51 | 442 | { |
aa2731ad | 443 | return ata_wait_ready(link, deadline, ata_sff_check_ready); |
624d5c51 | 444 | } |
0fe40ff8 | 445 | EXPORT_SYMBOL_GPL(ata_sff_wait_ready); |
624d5c51 | 446 | |
41dec29b SS |
447 | /** |
448 | * ata_sff_set_devctl - Write device control reg | |
449 | * @ap: port where the device is | |
450 | * @ctl: value to write | |
451 | * | |
452 | * Writes ATA taskfile device control register. | |
453 | * | |
454 | * Note: may NOT be used as the sff_set_devctl() entry in | |
455 | * ata_port_operations. | |
456 | * | |
457 | * LOCKING: | |
458 | * Inherited from caller. | |
459 | */ | |
460 | static void ata_sff_set_devctl(struct ata_port *ap, u8 ctl) | |
461 | { | |
462 | if (ap->ops->sff_set_devctl) | |
463 | ap->ops->sff_set_devctl(ap, ctl); | |
464 | else | |
465 | iowrite8(ctl, ap->ioaddr.ctl_addr); | |
466 | } | |
467 | ||
624d5c51 | 468 | /** |
9363c382 | 469 | * ata_sff_dev_select - Select device 0/1 on ATA bus |
624d5c51 TH |
470 | * @ap: ATA channel to manipulate |
471 | * @device: ATA device (numbered from zero) to select | |
472 | * | |
473 | * Use the method defined in the ATA specification to | |
474 | * make either device 0, or device 1, active on the | |
475 | * ATA channel. Works with both PIO and MMIO. | |
476 | * | |
477 | * May be used as the dev_select() entry in ata_port_operations. | |
478 | * | |
479 | * LOCKING: | |
480 | * caller. | |
481 | */ | |
9363c382 | 482 | void ata_sff_dev_select(struct ata_port *ap, unsigned int device) |
624d5c51 TH |
483 | { |
484 | u8 tmp; | |
485 | ||
486 | if (device == 0) | |
487 | tmp = ATA_DEVICE_OBS; | |
488 | else | |
489 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
490 | ||
491 | iowrite8(tmp, ap->ioaddr.device_addr); | |
9363c382 | 492 | ata_sff_pause(ap); /* needed; also flushes, for mmio */ |
624d5c51 | 493 | } |
0fe40ff8 | 494 | EXPORT_SYMBOL_GPL(ata_sff_dev_select); |
624d5c51 TH |
495 | |
496 | /** | |
497 | * ata_dev_select - Select device 0/1 on ATA bus | |
498 | * @ap: ATA channel to manipulate | |
499 | * @device: ATA device (numbered from zero) to select | |
500 | * @wait: non-zero to wait for Status register BSY bit to clear | |
501 | * @can_sleep: non-zero if context allows sleeping | |
502 | * | |
503 | * Use the method defined in the ATA specification to | |
504 | * make either device 0, or device 1, active on the | |
505 | * ATA channel. | |
506 | * | |
9363c382 TH |
507 | * This is a high-level version of ata_sff_dev_select(), which |
508 | * additionally provides the services of inserting the proper | |
509 | * pauses and status polling, where needed. | |
624d5c51 TH |
510 | * |
511 | * LOCKING: | |
512 | * caller. | |
513 | */ | |
514 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
515 | unsigned int wait, unsigned int can_sleep) | |
516 | { | |
517 | if (ata_msg_probe(ap)) | |
518 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " | |
519 | "device %u, wait %u\n", device, wait); | |
520 | ||
521 | if (wait) | |
522 | ata_wait_idle(ap); | |
523 | ||
5682ed33 | 524 | ap->ops->sff_dev_select(ap, device); |
624d5c51 TH |
525 | |
526 | if (wait) { | |
527 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) | |
528 | msleep(150); | |
529 | ata_wait_idle(ap); | |
530 | } | |
531 | } | |
532 | ||
533 | /** | |
9363c382 | 534 | * ata_sff_irq_on - Enable interrupts on a port. |
624d5c51 TH |
535 | * @ap: Port on which interrupts are enabled. |
536 | * | |
537 | * Enable interrupts on a legacy IDE device using MMIO or PIO, | |
538 | * wait for idle, clear any pending interrupts. | |
539 | * | |
e42a542b SS |
540 | * Note: may NOT be used as the sff_irq_on() entry in |
541 | * ata_port_operations. | |
542 | * | |
624d5c51 TH |
543 | * LOCKING: |
544 | * Inherited from caller. | |
545 | */ | |
e42a542b | 546 | void ata_sff_irq_on(struct ata_port *ap) |
624d5c51 TH |
547 | { |
548 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
e42a542b SS |
549 | |
550 | if (ap->ops->sff_irq_on) { | |
551 | ap->ops->sff_irq_on(ap); | |
552 | return; | |
553 | } | |
624d5c51 TH |
554 | |
555 | ap->ctl &= ~ATA_NIEN; | |
556 | ap->last_ctl = ap->ctl; | |
557 | ||
e42a542b SS |
558 | if (ap->ops->sff_set_devctl || ioaddr->ctl_addr) |
559 | ata_sff_set_devctl(ap, ap->ctl); | |
560 | ata_wait_idle(ap); | |
624d5c51 | 561 | |
5682ed33 | 562 | ap->ops->sff_irq_clear(ap); |
624d5c51 | 563 | } |
0fe40ff8 | 564 | EXPORT_SYMBOL_GPL(ata_sff_irq_on); |
624d5c51 TH |
565 | |
566 | /** | |
9363c382 | 567 | * ata_sff_irq_clear - Clear PCI IDE BMDMA interrupt. |
624d5c51 TH |
568 | * @ap: Port associated with this ATA transaction. |
569 | * | |
570 | * Clear interrupt and error flags in DMA status register. | |
571 | * | |
572 | * May be used as the irq_clear() entry in ata_port_operations. | |
573 | * | |
574 | * LOCKING: | |
575 | * spin_lock_irqsave(host lock) | |
576 | */ | |
9363c382 | 577 | void ata_sff_irq_clear(struct ata_port *ap) |
624d5c51 TH |
578 | { |
579 | void __iomem *mmio = ap->ioaddr.bmdma_addr; | |
580 | ||
581 | if (!mmio) | |
582 | return; | |
583 | ||
584 | iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS); | |
585 | } | |
0fe40ff8 | 586 | EXPORT_SYMBOL_GPL(ata_sff_irq_clear); |
624d5c51 TH |
587 | |
588 | /** | |
9363c382 | 589 | * ata_sff_tf_load - send taskfile registers to host controller |
624d5c51 TH |
590 | * @ap: Port to which output is sent |
591 | * @tf: ATA taskfile register set | |
592 | * | |
593 | * Outputs ATA taskfile to standard ATA host controller. | |
594 | * | |
595 | * LOCKING: | |
596 | * Inherited from caller. | |
597 | */ | |
9363c382 | 598 | void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
624d5c51 TH |
599 | { |
600 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
601 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; | |
602 | ||
603 | if (tf->ctl != ap->last_ctl) { | |
604 | if (ioaddr->ctl_addr) | |
605 | iowrite8(tf->ctl, ioaddr->ctl_addr); | |
606 | ap->last_ctl = tf->ctl; | |
607 | ata_wait_idle(ap); | |
608 | } | |
609 | ||
610 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { | |
efcb3cf7 | 611 | WARN_ON_ONCE(!ioaddr->ctl_addr); |
624d5c51 TH |
612 | iowrite8(tf->hob_feature, ioaddr->feature_addr); |
613 | iowrite8(tf->hob_nsect, ioaddr->nsect_addr); | |
614 | iowrite8(tf->hob_lbal, ioaddr->lbal_addr); | |
615 | iowrite8(tf->hob_lbam, ioaddr->lbam_addr); | |
616 | iowrite8(tf->hob_lbah, ioaddr->lbah_addr); | |
617 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", | |
618 | tf->hob_feature, | |
619 | tf->hob_nsect, | |
620 | tf->hob_lbal, | |
621 | tf->hob_lbam, | |
622 | tf->hob_lbah); | |
623 | } | |
624 | ||
625 | if (is_addr) { | |
626 | iowrite8(tf->feature, ioaddr->feature_addr); | |
627 | iowrite8(tf->nsect, ioaddr->nsect_addr); | |
628 | iowrite8(tf->lbal, ioaddr->lbal_addr); | |
629 | iowrite8(tf->lbam, ioaddr->lbam_addr); | |
630 | iowrite8(tf->lbah, ioaddr->lbah_addr); | |
631 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", | |
632 | tf->feature, | |
633 | tf->nsect, | |
634 | tf->lbal, | |
635 | tf->lbam, | |
636 | tf->lbah); | |
637 | } | |
638 | ||
639 | if (tf->flags & ATA_TFLAG_DEVICE) { | |
640 | iowrite8(tf->device, ioaddr->device_addr); | |
641 | VPRINTK("device 0x%X\n", tf->device); | |
642 | } | |
643 | ||
644 | ata_wait_idle(ap); | |
645 | } | |
0fe40ff8 | 646 | EXPORT_SYMBOL_GPL(ata_sff_tf_load); |
624d5c51 TH |
647 | |
648 | /** | |
9363c382 | 649 | * ata_sff_tf_read - input device's ATA taskfile shadow registers |
624d5c51 TH |
650 | * @ap: Port from which input is read |
651 | * @tf: ATA taskfile register set for storing input | |
652 | * | |
653 | * Reads ATA taskfile registers for currently-selected device | |
654 | * into @tf. Assumes the device has a fully SFF compliant task file | |
655 | * layout and behaviour. If you device does not (eg has a different | |
656 | * status method) then you will need to provide a replacement tf_read | |
657 | * | |
658 | * LOCKING: | |
659 | * Inherited from caller. | |
660 | */ | |
9363c382 | 661 | void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
624d5c51 TH |
662 | { |
663 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
664 | ||
9363c382 | 665 | tf->command = ata_sff_check_status(ap); |
624d5c51 TH |
666 | tf->feature = ioread8(ioaddr->error_addr); |
667 | tf->nsect = ioread8(ioaddr->nsect_addr); | |
668 | tf->lbal = ioread8(ioaddr->lbal_addr); | |
669 | tf->lbam = ioread8(ioaddr->lbam_addr); | |
670 | tf->lbah = ioread8(ioaddr->lbah_addr); | |
671 | tf->device = ioread8(ioaddr->device_addr); | |
672 | ||
673 | if (tf->flags & ATA_TFLAG_LBA48) { | |
674 | if (likely(ioaddr->ctl_addr)) { | |
675 | iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr); | |
676 | tf->hob_feature = ioread8(ioaddr->error_addr); | |
677 | tf->hob_nsect = ioread8(ioaddr->nsect_addr); | |
678 | tf->hob_lbal = ioread8(ioaddr->lbal_addr); | |
679 | tf->hob_lbam = ioread8(ioaddr->lbam_addr); | |
680 | tf->hob_lbah = ioread8(ioaddr->lbah_addr); | |
681 | iowrite8(tf->ctl, ioaddr->ctl_addr); | |
682 | ap->last_ctl = tf->ctl; | |
683 | } else | |
efcb3cf7 | 684 | WARN_ON_ONCE(1); |
624d5c51 TH |
685 | } |
686 | } | |
0fe40ff8 | 687 | EXPORT_SYMBOL_GPL(ata_sff_tf_read); |
624d5c51 TH |
688 | |
689 | /** | |
9363c382 | 690 | * ata_sff_exec_command - issue ATA command to host controller |
624d5c51 TH |
691 | * @ap: port to which command is being issued |
692 | * @tf: ATA taskfile register set | |
693 | * | |
694 | * Issues ATA command, with proper synchronization with interrupt | |
695 | * handler / other threads. | |
696 | * | |
697 | * LOCKING: | |
698 | * spin_lock_irqsave(host lock) | |
699 | */ | |
9363c382 | 700 | void ata_sff_exec_command(struct ata_port *ap, const struct ata_taskfile *tf) |
624d5c51 TH |
701 | { |
702 | DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command); | |
703 | ||
704 | iowrite8(tf->command, ap->ioaddr.command_addr); | |
9363c382 | 705 | ata_sff_pause(ap); |
624d5c51 | 706 | } |
0fe40ff8 | 707 | EXPORT_SYMBOL_GPL(ata_sff_exec_command); |
624d5c51 TH |
708 | |
709 | /** | |
710 | * ata_tf_to_host - issue ATA taskfile to host controller | |
711 | * @ap: port to which command is being issued | |
712 | * @tf: ATA taskfile register set | |
713 | * | |
714 | * Issues ATA taskfile register set to ATA host controller, | |
715 | * with proper synchronization with interrupt handler and | |
716 | * other threads. | |
717 | * | |
718 | * LOCKING: | |
719 | * spin_lock_irqsave(host lock) | |
720 | */ | |
721 | static inline void ata_tf_to_host(struct ata_port *ap, | |
722 | const struct ata_taskfile *tf) | |
723 | { | |
5682ed33 TH |
724 | ap->ops->sff_tf_load(ap, tf); |
725 | ap->ops->sff_exec_command(ap, tf); | |
624d5c51 TH |
726 | } |
727 | ||
728 | /** | |
9363c382 | 729 | * ata_sff_data_xfer - Transfer data by PIO |
624d5c51 TH |
730 | * @dev: device to target |
731 | * @buf: data buffer | |
732 | * @buflen: buffer length | |
733 | * @rw: read/write | |
734 | * | |
735 | * Transfer data from/to the device data register by PIO. | |
736 | * | |
737 | * LOCKING: | |
738 | * Inherited from caller. | |
739 | * | |
740 | * RETURNS: | |
741 | * Bytes consumed. | |
742 | */ | |
9363c382 TH |
743 | unsigned int ata_sff_data_xfer(struct ata_device *dev, unsigned char *buf, |
744 | unsigned int buflen, int rw) | |
624d5c51 TH |
745 | { |
746 | struct ata_port *ap = dev->link->ap; | |
747 | void __iomem *data_addr = ap->ioaddr.data_addr; | |
748 | unsigned int words = buflen >> 1; | |
749 | ||
750 | /* Transfer multiple of 2 bytes */ | |
751 | if (rw == READ) | |
752 | ioread16_rep(data_addr, buf, words); | |
753 | else | |
754 | iowrite16_rep(data_addr, buf, words); | |
755 | ||
2102d749 | 756 | /* Transfer trailing byte, if any. */ |
624d5c51 | 757 | if (unlikely(buflen & 0x01)) { |
2102d749 | 758 | unsigned char pad[2]; |
624d5c51 | 759 | |
2102d749 SS |
760 | /* Point buf to the tail of buffer */ |
761 | buf += buflen - 1; | |
762 | ||
763 | /* | |
764 | * Use io*16_rep() accessors here as well to avoid pointlessly | |
972b94ff | 765 | * swapping bytes to and from on the big endian machines... |
2102d749 | 766 | */ |
624d5c51 | 767 | if (rw == READ) { |
2102d749 SS |
768 | ioread16_rep(data_addr, pad, 1); |
769 | *buf = pad[0]; | |
624d5c51 | 770 | } else { |
2102d749 SS |
771 | pad[0] = *buf; |
772 | iowrite16_rep(data_addr, pad, 1); | |
624d5c51 TH |
773 | } |
774 | words++; | |
775 | } | |
776 | ||
777 | return words << 1; | |
778 | } | |
0fe40ff8 | 779 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer); |
624d5c51 | 780 | |
871af121 AC |
781 | /** |
782 | * ata_sff_data_xfer32 - Transfer data by PIO | |
783 | * @dev: device to target | |
784 | * @buf: data buffer | |
785 | * @buflen: buffer length | |
786 | * @rw: read/write | |
787 | * | |
788 | * Transfer data from/to the device data register by PIO using 32bit | |
789 | * I/O operations. | |
790 | * | |
791 | * LOCKING: | |
792 | * Inherited from caller. | |
793 | * | |
794 | * RETURNS: | |
795 | * Bytes consumed. | |
796 | */ | |
797 | ||
798 | unsigned int ata_sff_data_xfer32(struct ata_device *dev, unsigned char *buf, | |
799 | unsigned int buflen, int rw) | |
800 | { | |
801 | struct ata_port *ap = dev->link->ap; | |
802 | void __iomem *data_addr = ap->ioaddr.data_addr; | |
803 | unsigned int words = buflen >> 2; | |
804 | int slop = buflen & 3; | |
972b94ff | 805 | |
e3cf95dd AC |
806 | if (!(ap->pflags & ATA_PFLAG_PIO32)) |
807 | return ata_sff_data_xfer(dev, buf, buflen, rw); | |
871af121 AC |
808 | |
809 | /* Transfer multiple of 4 bytes */ | |
810 | if (rw == READ) | |
811 | ioread32_rep(data_addr, buf, words); | |
812 | else | |
813 | iowrite32_rep(data_addr, buf, words); | |
814 | ||
d1b3525b | 815 | /* Transfer trailing bytes, if any */ |
871af121 | 816 | if (unlikely(slop)) { |
d1b3525b SS |
817 | unsigned char pad[4]; |
818 | ||
819 | /* Point buf to the tail of buffer */ | |
820 | buf += buflen - slop; | |
821 | ||
822 | /* | |
823 | * Use io*_rep() accessors here as well to avoid pointlessly | |
972b94ff | 824 | * swapping bytes to and from on the big endian machines... |
d1b3525b | 825 | */ |
871af121 | 826 | if (rw == READ) { |
d1b3525b SS |
827 | if (slop < 3) |
828 | ioread16_rep(data_addr, pad, 1); | |
829 | else | |
830 | ioread32_rep(data_addr, pad, 1); | |
831 | memcpy(buf, pad, slop); | |
871af121 | 832 | } else { |
d1b3525b SS |
833 | memcpy(pad, buf, slop); |
834 | if (slop < 3) | |
835 | iowrite16_rep(data_addr, pad, 1); | |
836 | else | |
837 | iowrite32_rep(data_addr, pad, 1); | |
871af121 | 838 | } |
871af121 | 839 | } |
d1b3525b | 840 | return (buflen + 1) & ~1; |
871af121 AC |
841 | } |
842 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer32); | |
843 | ||
624d5c51 | 844 | /** |
9363c382 | 845 | * ata_sff_data_xfer_noirq - Transfer data by PIO |
624d5c51 TH |
846 | * @dev: device to target |
847 | * @buf: data buffer | |
848 | * @buflen: buffer length | |
849 | * @rw: read/write | |
850 | * | |
851 | * Transfer data from/to the device data register by PIO. Do the | |
852 | * transfer with interrupts disabled. | |
853 | * | |
854 | * LOCKING: | |
855 | * Inherited from caller. | |
856 | * | |
857 | * RETURNS: | |
858 | * Bytes consumed. | |
859 | */ | |
9363c382 TH |
860 | unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, |
861 | unsigned int buflen, int rw) | |
624d5c51 TH |
862 | { |
863 | unsigned long flags; | |
864 | unsigned int consumed; | |
865 | ||
866 | local_irq_save(flags); | |
9363c382 | 867 | consumed = ata_sff_data_xfer(dev, buf, buflen, rw); |
624d5c51 TH |
868 | local_irq_restore(flags); |
869 | ||
870 | return consumed; | |
871 | } | |
0fe40ff8 | 872 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer_noirq); |
624d5c51 TH |
873 | |
874 | /** | |
875 | * ata_pio_sector - Transfer a sector of data. | |
876 | * @qc: Command on going | |
877 | * | |
878 | * Transfer qc->sect_size bytes of data from/to the ATA device. | |
879 | * | |
880 | * LOCKING: | |
881 | * Inherited from caller. | |
882 | */ | |
883 | static void ata_pio_sector(struct ata_queued_cmd *qc) | |
884 | { | |
885 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
886 | struct ata_port *ap = qc->ap; | |
887 | struct page *page; | |
888 | unsigned int offset; | |
889 | unsigned char *buf; | |
890 | ||
891 | if (qc->curbytes == qc->nbytes - qc->sect_size) | |
892 | ap->hsm_task_state = HSM_ST_LAST; | |
893 | ||
894 | page = sg_page(qc->cursg); | |
895 | offset = qc->cursg->offset + qc->cursg_ofs; | |
896 | ||
897 | /* get the current page and offset */ | |
898 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
899 | offset %= PAGE_SIZE; | |
900 | ||
901 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
902 | ||
903 | if (PageHighMem(page)) { | |
904 | unsigned long flags; | |
905 | ||
906 | /* FIXME: use a bounce buffer */ | |
907 | local_irq_save(flags); | |
908 | buf = kmap_atomic(page, KM_IRQ0); | |
909 | ||
910 | /* do the actual data transfer */ | |
5682ed33 TH |
911 | ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, |
912 | do_write); | |
624d5c51 TH |
913 | |
914 | kunmap_atomic(buf, KM_IRQ0); | |
915 | local_irq_restore(flags); | |
916 | } else { | |
917 | buf = page_address(page); | |
5682ed33 TH |
918 | ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, |
919 | do_write); | |
624d5c51 TH |
920 | } |
921 | ||
2d68b7fe CM |
922 | if (!do_write) |
923 | flush_dcache_page(page); | |
924 | ||
624d5c51 TH |
925 | qc->curbytes += qc->sect_size; |
926 | qc->cursg_ofs += qc->sect_size; | |
927 | ||
928 | if (qc->cursg_ofs == qc->cursg->length) { | |
929 | qc->cursg = sg_next(qc->cursg); | |
930 | qc->cursg_ofs = 0; | |
931 | } | |
932 | } | |
933 | ||
934 | /** | |
935 | * ata_pio_sectors - Transfer one or many sectors. | |
936 | * @qc: Command on going | |
937 | * | |
938 | * Transfer one or many sectors of data from/to the | |
939 | * ATA device for the DRQ request. | |
940 | * | |
941 | * LOCKING: | |
942 | * Inherited from caller. | |
943 | */ | |
944 | static void ata_pio_sectors(struct ata_queued_cmd *qc) | |
945 | { | |
946 | if (is_multi_taskfile(&qc->tf)) { | |
947 | /* READ/WRITE MULTIPLE */ | |
948 | unsigned int nsect; | |
949 | ||
efcb3cf7 | 950 | WARN_ON_ONCE(qc->dev->multi_count == 0); |
624d5c51 TH |
951 | |
952 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, | |
953 | qc->dev->multi_count); | |
954 | while (nsect--) | |
955 | ata_pio_sector(qc); | |
956 | } else | |
957 | ata_pio_sector(qc); | |
958 | ||
a57c1bad | 959 | ata_sff_sync(qc->ap); /* flush */ |
624d5c51 TH |
960 | } |
961 | ||
962 | /** | |
963 | * atapi_send_cdb - Write CDB bytes to hardware | |
964 | * @ap: Port to which ATAPI device is attached. | |
965 | * @qc: Taskfile currently active | |
966 | * | |
967 | * When device has indicated its readiness to accept | |
968 | * a CDB, this function is called. Send the CDB. | |
969 | * | |
970 | * LOCKING: | |
971 | * caller. | |
972 | */ | |
973 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
974 | { | |
975 | /* send SCSI cdb */ | |
976 | DPRINTK("send cdb\n"); | |
efcb3cf7 | 977 | WARN_ON_ONCE(qc->dev->cdb_len < 12); |
624d5c51 | 978 | |
5682ed33 | 979 | ap->ops->sff_data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
a57c1bad AC |
980 | ata_sff_sync(ap); |
981 | /* FIXME: If the CDB is for DMA do we need to do the transition delay | |
982 | or is bmdma_start guaranteed to do it ? */ | |
624d5c51 TH |
983 | switch (qc->tf.protocol) { |
984 | case ATAPI_PROT_PIO: | |
985 | ap->hsm_task_state = HSM_ST; | |
986 | break; | |
987 | case ATAPI_PROT_NODATA: | |
988 | ap->hsm_task_state = HSM_ST_LAST; | |
989 | break; | |
990 | case ATAPI_PROT_DMA: | |
991 | ap->hsm_task_state = HSM_ST_LAST; | |
992 | /* initiate bmdma */ | |
993 | ap->ops->bmdma_start(qc); | |
994 | break; | |
995 | } | |
996 | } | |
997 | ||
998 | /** | |
999 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
1000 | * @qc: Command on going | |
1001 | * @bytes: number of bytes | |
1002 | * | |
1003 | * Transfer Transfer data from/to the ATAPI device. | |
1004 | * | |
1005 | * LOCKING: | |
1006 | * Inherited from caller. | |
1007 | * | |
1008 | */ | |
1009 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) | |
1010 | { | |
1011 | int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; | |
1012 | struct ata_port *ap = qc->ap; | |
1013 | struct ata_device *dev = qc->dev; | |
1014 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
1015 | struct scatterlist *sg; | |
1016 | struct page *page; | |
1017 | unsigned char *buf; | |
1018 | unsigned int offset, count, consumed; | |
1019 | ||
1020 | next_sg: | |
1021 | sg = qc->cursg; | |
1022 | if (unlikely(!sg)) { | |
1023 | ata_ehi_push_desc(ehi, "unexpected or too much trailing data " | |
1024 | "buf=%u cur=%u bytes=%u", | |
1025 | qc->nbytes, qc->curbytes, bytes); | |
1026 | return -1; | |
1027 | } | |
1028 | ||
1029 | page = sg_page(sg); | |
1030 | offset = sg->offset + qc->cursg_ofs; | |
1031 | ||
1032 | /* get the current page and offset */ | |
1033 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
1034 | offset %= PAGE_SIZE; | |
1035 | ||
1036 | /* don't overrun current sg */ | |
1037 | count = min(sg->length - qc->cursg_ofs, bytes); | |
1038 | ||
1039 | /* don't cross page boundaries */ | |
1040 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
1041 | ||
1042 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
1043 | ||
1044 | if (PageHighMem(page)) { | |
1045 | unsigned long flags; | |
1046 | ||
1047 | /* FIXME: use bounce buffer */ | |
1048 | local_irq_save(flags); | |
1049 | buf = kmap_atomic(page, KM_IRQ0); | |
1050 | ||
1051 | /* do the actual data transfer */ | |
0fe40ff8 AC |
1052 | consumed = ap->ops->sff_data_xfer(dev, buf + offset, |
1053 | count, rw); | |
624d5c51 TH |
1054 | |
1055 | kunmap_atomic(buf, KM_IRQ0); | |
1056 | local_irq_restore(flags); | |
1057 | } else { | |
1058 | buf = page_address(page); | |
0fe40ff8 AC |
1059 | consumed = ap->ops->sff_data_xfer(dev, buf + offset, |
1060 | count, rw); | |
624d5c51 TH |
1061 | } |
1062 | ||
1063 | bytes -= min(bytes, consumed); | |
1064 | qc->curbytes += count; | |
1065 | qc->cursg_ofs += count; | |
1066 | ||
1067 | if (qc->cursg_ofs == sg->length) { | |
1068 | qc->cursg = sg_next(qc->cursg); | |
1069 | qc->cursg_ofs = 0; | |
1070 | } | |
1071 | ||
a0f79f7a CB |
1072 | /* |
1073 | * There used to be a WARN_ON_ONCE(qc->cursg && count != consumed); | |
1074 | * Unfortunately __atapi_pio_bytes doesn't know enough to do the WARN | |
1075 | * check correctly as it doesn't know if it is the last request being | |
1076 | * made. Somebody should implement a proper sanity check. | |
1077 | */ | |
624d5c51 TH |
1078 | if (bytes) |
1079 | goto next_sg; | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
1085 | * @qc: Command on going | |
1086 | * | |
1087 | * Transfer Transfer data from/to the ATAPI device. | |
1088 | * | |
1089 | * LOCKING: | |
1090 | * Inherited from caller. | |
1091 | */ | |
1092 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) | |
1093 | { | |
1094 | struct ata_port *ap = qc->ap; | |
1095 | struct ata_device *dev = qc->dev; | |
1096 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
1097 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
1098 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1099 | ||
1100 | /* Abuse qc->result_tf for temp storage of intermediate TF | |
1101 | * here to save some kernel stack usage. | |
1102 | * For normal completion, qc->result_tf is not relevant. For | |
1103 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
1104 | * So, the correctness of qc->result_tf is not affected. | |
1105 | */ | |
5682ed33 | 1106 | ap->ops->sff_tf_read(ap, &qc->result_tf); |
624d5c51 TH |
1107 | ireason = qc->result_tf.nsect; |
1108 | bc_lo = qc->result_tf.lbam; | |
1109 | bc_hi = qc->result_tf.lbah; | |
1110 | bytes = (bc_hi << 8) | bc_lo; | |
1111 | ||
1112 | /* shall be cleared to zero, indicating xfer of data */ | |
1113 | if (unlikely(ireason & (1 << 0))) | |
1114 | goto atapi_check; | |
1115 | ||
1116 | /* make sure transfer direction matches expected */ | |
1117 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
1118 | if (unlikely(do_write != i_write)) | |
1119 | goto atapi_check; | |
1120 | ||
1121 | if (unlikely(!bytes)) | |
1122 | goto atapi_check; | |
1123 | ||
1124 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); | |
1125 | ||
1126 | if (unlikely(__atapi_pio_bytes(qc, bytes))) | |
1127 | goto err_out; | |
a57c1bad | 1128 | ata_sff_sync(ap); /* flush */ |
624d5c51 TH |
1129 | |
1130 | return; | |
1131 | ||
1132 | atapi_check: | |
1133 | ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", | |
1134 | ireason, bytes); | |
1135 | err_out: | |
1136 | qc->err_mask |= AC_ERR_HSM; | |
1137 | ap->hsm_task_state = HSM_ST_ERR; | |
1138 | } | |
1139 | ||
1140 | /** | |
1141 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. | |
1142 | * @ap: the target ata_port | |
1143 | * @qc: qc on going | |
1144 | * | |
1145 | * RETURNS: | |
1146 | * 1 if ok in workqueue, 0 otherwise. | |
1147 | */ | |
0fe40ff8 AC |
1148 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, |
1149 | struct ata_queued_cmd *qc) | |
624d5c51 TH |
1150 | { |
1151 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1152 | return 1; | |
1153 | ||
1154 | if (ap->hsm_task_state == HSM_ST_FIRST) { | |
1155 | if (qc->tf.protocol == ATA_PROT_PIO && | |
0fe40ff8 | 1156 | (qc->tf.flags & ATA_TFLAG_WRITE)) |
624d5c51 TH |
1157 | return 1; |
1158 | ||
1159 | if (ata_is_atapi(qc->tf.protocol) && | |
0fe40ff8 | 1160 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
624d5c51 TH |
1161 | return 1; |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
1169 | * @qc: Command to complete | |
1170 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
1171 | * | |
1172 | * Finish @qc which is running on standard HSM. | |
1173 | * | |
1174 | * LOCKING: | |
1175 | * If @in_wq is zero, spin_lock_irqsave(host lock). | |
1176 | * Otherwise, none on entry and grabs host lock. | |
1177 | */ | |
1178 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
1179 | { | |
1180 | struct ata_port *ap = qc->ap; | |
1181 | unsigned long flags; | |
1182 | ||
1183 | if (ap->ops->error_handler) { | |
1184 | if (in_wq) { | |
1185 | spin_lock_irqsave(ap->lock, flags); | |
1186 | ||
1187 | /* EH might have kicked in while host lock is | |
1188 | * released. | |
1189 | */ | |
1190 | qc = ata_qc_from_tag(ap, qc->tag); | |
1191 | if (qc) { | |
1192 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
e42a542b | 1193 | ata_sff_irq_on(ap); |
624d5c51 TH |
1194 | ata_qc_complete(qc); |
1195 | } else | |
1196 | ata_port_freeze(ap); | |
1197 | } | |
1198 | ||
1199 | spin_unlock_irqrestore(ap->lock, flags); | |
1200 | } else { | |
1201 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
1202 | ata_qc_complete(qc); | |
1203 | else | |
1204 | ata_port_freeze(ap); | |
1205 | } | |
1206 | } else { | |
1207 | if (in_wq) { | |
1208 | spin_lock_irqsave(ap->lock, flags); | |
e42a542b | 1209 | ata_sff_irq_on(ap); |
624d5c51 TH |
1210 | ata_qc_complete(qc); |
1211 | spin_unlock_irqrestore(ap->lock, flags); | |
1212 | } else | |
1213 | ata_qc_complete(qc); | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | /** | |
9363c382 | 1218 | * ata_sff_hsm_move - move the HSM to the next state. |
624d5c51 TH |
1219 | * @ap: the target ata_port |
1220 | * @qc: qc on going | |
1221 | * @status: current device status | |
1222 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
1223 | * | |
1224 | * RETURNS: | |
1225 | * 1 when poll next status needed, 0 otherwise. | |
1226 | */ | |
9363c382 TH |
1227 | int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
1228 | u8 status, int in_wq) | |
624d5c51 | 1229 | { |
a836d3e8 | 1230 | struct ata_eh_info *ehi = &ap->link.eh_info; |
624d5c51 TH |
1231 | unsigned long flags = 0; |
1232 | int poll_next; | |
1233 | ||
efcb3cf7 | 1234 | WARN_ON_ONCE((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
624d5c51 | 1235 | |
9363c382 | 1236 | /* Make sure ata_sff_qc_issue() does not throw things |
624d5c51 TH |
1237 | * like DMA polling into the workqueue. Notice that |
1238 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
1239 | */ | |
efcb3cf7 | 1240 | WARN_ON_ONCE(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
624d5c51 TH |
1241 | |
1242 | fsm_start: | |
1243 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", | |
1244 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); | |
1245 | ||
1246 | switch (ap->hsm_task_state) { | |
1247 | case HSM_ST_FIRST: | |
1248 | /* Send first data block or PACKET CDB */ | |
1249 | ||
1250 | /* If polling, we will stay in the work queue after | |
1251 | * sending the data. Otherwise, interrupt handler | |
1252 | * takes over after sending the data. | |
1253 | */ | |
1254 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
1255 | ||
1256 | /* check device status */ | |
1257 | if (unlikely((status & ATA_DRQ) == 0)) { | |
1258 | /* handle BSY=0, DRQ=0 as error */ | |
1259 | if (likely(status & (ATA_ERR | ATA_DF))) | |
1260 | /* device stops HSM for abort/error */ | |
1261 | qc->err_mask |= AC_ERR_DEV; | |
a836d3e8 | 1262 | else { |
624d5c51 | 1263 | /* HSM violation. Let EH handle this */ |
a836d3e8 TH |
1264 | ata_ehi_push_desc(ehi, |
1265 | "ST_FIRST: !(DRQ|ERR|DF)"); | |
624d5c51 | 1266 | qc->err_mask |= AC_ERR_HSM; |
a836d3e8 | 1267 | } |
624d5c51 TH |
1268 | |
1269 | ap->hsm_task_state = HSM_ST_ERR; | |
1270 | goto fsm_start; | |
1271 | } | |
1272 | ||
1273 | /* Device should not ask for data transfer (DRQ=1) | |
1274 | * when it finds something wrong. | |
1275 | * We ignore DRQ here and stop the HSM by | |
1276 | * changing hsm_task_state to HSM_ST_ERR and | |
1277 | * let the EH abort the command or reset the device. | |
1278 | */ | |
1279 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
1280 | /* Some ATAPI tape drives forget to clear the ERR bit | |
1281 | * when doing the next command (mostly request sense). | |
1282 | * We ignore ERR here to workaround and proceed sending | |
1283 | * the CDB. | |
1284 | */ | |
1285 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { | |
a836d3e8 TH |
1286 | ata_ehi_push_desc(ehi, "ST_FIRST: " |
1287 | "DRQ=1 with device error, " | |
1288 | "dev_stat 0x%X", status); | |
624d5c51 TH |
1289 | qc->err_mask |= AC_ERR_HSM; |
1290 | ap->hsm_task_state = HSM_ST_ERR; | |
1291 | goto fsm_start; | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | /* Send the CDB (atapi) or the first data block (ata pio out). | |
1296 | * During the state transition, interrupt handler shouldn't | |
1297 | * be invoked before the data transfer is complete and | |
1298 | * hsm_task_state is changed. Hence, the following locking. | |
1299 | */ | |
1300 | if (in_wq) | |
1301 | spin_lock_irqsave(ap->lock, flags); | |
1302 | ||
1303 | if (qc->tf.protocol == ATA_PROT_PIO) { | |
1304 | /* PIO data out protocol. | |
1305 | * send first data block. | |
1306 | */ | |
1307 | ||
1308 | /* ata_pio_sectors() might change the state | |
1309 | * to HSM_ST_LAST. so, the state is changed here | |
1310 | * before ata_pio_sectors(). | |
1311 | */ | |
1312 | ap->hsm_task_state = HSM_ST; | |
1313 | ata_pio_sectors(qc); | |
1314 | } else | |
1315 | /* send CDB */ | |
1316 | atapi_send_cdb(ap, qc); | |
1317 | ||
1318 | if (in_wq) | |
1319 | spin_unlock_irqrestore(ap->lock, flags); | |
1320 | ||
1321 | /* if polling, ata_pio_task() handles the rest. | |
1322 | * otherwise, interrupt handler takes over from here. | |
1323 | */ | |
1324 | break; | |
1325 | ||
1326 | case HSM_ST: | |
1327 | /* complete command or read/write the data register */ | |
1328 | if (qc->tf.protocol == ATAPI_PROT_PIO) { | |
1329 | /* ATAPI PIO protocol */ | |
1330 | if ((status & ATA_DRQ) == 0) { | |
1331 | /* No more data to transfer or device error. | |
1332 | * Device error will be tagged in HSM_ST_LAST. | |
1333 | */ | |
1334 | ap->hsm_task_state = HSM_ST_LAST; | |
1335 | goto fsm_start; | |
1336 | } | |
1337 | ||
1338 | /* Device should not ask for data transfer (DRQ=1) | |
1339 | * when it finds something wrong. | |
1340 | * We ignore DRQ here and stop the HSM by | |
1341 | * changing hsm_task_state to HSM_ST_ERR and | |
1342 | * let the EH abort the command or reset the device. | |
1343 | */ | |
1344 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
a836d3e8 TH |
1345 | ata_ehi_push_desc(ehi, "ST-ATAPI: " |
1346 | "DRQ=1 with device error, " | |
1347 | "dev_stat 0x%X", status); | |
624d5c51 TH |
1348 | qc->err_mask |= AC_ERR_HSM; |
1349 | ap->hsm_task_state = HSM_ST_ERR; | |
1350 | goto fsm_start; | |
1351 | } | |
1352 | ||
1353 | atapi_pio_bytes(qc); | |
1354 | ||
1355 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) | |
1356 | /* bad ireason reported by device */ | |
1357 | goto fsm_start; | |
1358 | ||
1359 | } else { | |
1360 | /* ATA PIO protocol */ | |
1361 | if (unlikely((status & ATA_DRQ) == 0)) { | |
1362 | /* handle BSY=0, DRQ=0 as error */ | |
6a6b97d3 | 1363 | if (likely(status & (ATA_ERR | ATA_DF))) { |
624d5c51 TH |
1364 | /* device stops HSM for abort/error */ |
1365 | qc->err_mask |= AC_ERR_DEV; | |
6a6b97d3 TH |
1366 | |
1367 | /* If diagnostic failed and this is | |
1368 | * IDENTIFY, it's likely a phantom | |
1369 | * device. Mark hint. | |
1370 | */ | |
1371 | if (qc->dev->horkage & | |
1372 | ATA_HORKAGE_DIAGNOSTIC) | |
1373 | qc->err_mask |= | |
1374 | AC_ERR_NODEV_HINT; | |
1375 | } else { | |
624d5c51 TH |
1376 | /* HSM violation. Let EH handle this. |
1377 | * Phantom devices also trigger this | |
1378 | * condition. Mark hint. | |
1379 | */ | |
a836d3e8 | 1380 | ata_ehi_push_desc(ehi, "ST-ATA: " |
80ee6f54 | 1381 | "DRQ=0 without device error, " |
a836d3e8 | 1382 | "dev_stat 0x%X", status); |
624d5c51 TH |
1383 | qc->err_mask |= AC_ERR_HSM | |
1384 | AC_ERR_NODEV_HINT; | |
a836d3e8 | 1385 | } |
624d5c51 TH |
1386 | |
1387 | ap->hsm_task_state = HSM_ST_ERR; | |
1388 | goto fsm_start; | |
1389 | } | |
1390 | ||
1391 | /* For PIO reads, some devices may ask for | |
1392 | * data transfer (DRQ=1) alone with ERR=1. | |
1393 | * We respect DRQ here and transfer one | |
1394 | * block of junk data before changing the | |
1395 | * hsm_task_state to HSM_ST_ERR. | |
1396 | * | |
1397 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
1398 | * sense since the data block has been | |
1399 | * transferred to the device. | |
1400 | */ | |
1401 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
1402 | /* data might be corrputed */ | |
1403 | qc->err_mask |= AC_ERR_DEV; | |
1404 | ||
1405 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
1406 | ata_pio_sectors(qc); | |
1407 | status = ata_wait_idle(ap); | |
1408 | } | |
1409 | ||
a836d3e8 TH |
1410 | if (status & (ATA_BUSY | ATA_DRQ)) { |
1411 | ata_ehi_push_desc(ehi, "ST-ATA: " | |
1412 | "BUSY|DRQ persists on ERR|DF, " | |
1413 | "dev_stat 0x%X", status); | |
624d5c51 | 1414 | qc->err_mask |= AC_ERR_HSM; |
a836d3e8 | 1415 | } |
624d5c51 | 1416 | |
b919930c TH |
1417 | /* There are oddball controllers with |
1418 | * status register stuck at 0x7f and | |
1419 | * lbal/m/h at zero which makes it | |
1420 | * pass all other presence detection | |
1421 | * mechanisms we have. Set NODEV_HINT | |
1422 | * for it. Kernel bz#7241. | |
1423 | */ | |
1424 | if (status == 0x7f) | |
1425 | qc->err_mask |= AC_ERR_NODEV_HINT; | |
1426 | ||
624d5c51 TH |
1427 | /* ata_pio_sectors() might change the |
1428 | * state to HSM_ST_LAST. so, the state | |
1429 | * is changed after ata_pio_sectors(). | |
1430 | */ | |
1431 | ap->hsm_task_state = HSM_ST_ERR; | |
1432 | goto fsm_start; | |
1433 | } | |
1434 | ||
1435 | ata_pio_sectors(qc); | |
1436 | ||
1437 | if (ap->hsm_task_state == HSM_ST_LAST && | |
1438 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
1439 | /* all data read */ | |
1440 | status = ata_wait_idle(ap); | |
1441 | goto fsm_start; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | poll_next = 1; | |
1446 | break; | |
1447 | ||
1448 | case HSM_ST_LAST: | |
1449 | if (unlikely(!ata_ok(status))) { | |
1450 | qc->err_mask |= __ac_err_mask(status); | |
1451 | ap->hsm_task_state = HSM_ST_ERR; | |
1452 | goto fsm_start; | |
1453 | } | |
1454 | ||
1455 | /* no more data to transfer */ | |
1456 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", | |
1457 | ap->print_id, qc->dev->devno, status); | |
1458 | ||
efcb3cf7 | 1459 | WARN_ON_ONCE(qc->err_mask & (AC_ERR_DEV | AC_ERR_HSM)); |
624d5c51 TH |
1460 | |
1461 | ap->hsm_task_state = HSM_ST_IDLE; | |
1462 | ||
1463 | /* complete taskfile transaction */ | |
1464 | ata_hsm_qc_complete(qc, in_wq); | |
1465 | ||
1466 | poll_next = 0; | |
1467 | break; | |
1468 | ||
1469 | case HSM_ST_ERR: | |
624d5c51 TH |
1470 | ap->hsm_task_state = HSM_ST_IDLE; |
1471 | ||
1472 | /* complete taskfile transaction */ | |
1473 | ata_hsm_qc_complete(qc, in_wq); | |
1474 | ||
1475 | poll_next = 0; | |
1476 | break; | |
1477 | default: | |
1478 | poll_next = 0; | |
1479 | BUG(); | |
1480 | } | |
1481 | ||
1482 | return poll_next; | |
1483 | } | |
0fe40ff8 | 1484 | EXPORT_SYMBOL_GPL(ata_sff_hsm_move); |
624d5c51 TH |
1485 | |
1486 | void ata_pio_task(struct work_struct *work) | |
1487 | { | |
1488 | struct ata_port *ap = | |
1489 | container_of(work, struct ata_port, port_task.work); | |
1490 | struct ata_queued_cmd *qc = ap->port_task_data; | |
1491 | u8 status; | |
1492 | int poll_next; | |
1493 | ||
1494 | fsm_start: | |
efcb3cf7 | 1495 | WARN_ON_ONCE(ap->hsm_task_state == HSM_ST_IDLE); |
624d5c51 TH |
1496 | |
1497 | /* | |
1498 | * This is purely heuristic. This is a fast path. | |
1499 | * Sometimes when we enter, BSY will be cleared in | |
1500 | * a chk-status or two. If not, the drive is probably seeking | |
1501 | * or something. Snooze for a couple msecs, then | |
1502 | * chk-status again. If still busy, queue delayed work. | |
1503 | */ | |
9363c382 | 1504 | status = ata_sff_busy_wait(ap, ATA_BUSY, 5); |
624d5c51 TH |
1505 | if (status & ATA_BUSY) { |
1506 | msleep(2); | |
9363c382 | 1507 | status = ata_sff_busy_wait(ap, ATA_BUSY, 10); |
624d5c51 TH |
1508 | if (status & ATA_BUSY) { |
1509 | ata_pio_queue_task(ap, qc, ATA_SHORT_PAUSE); | |
1510 | return; | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | /* move the HSM */ | |
9363c382 | 1515 | poll_next = ata_sff_hsm_move(ap, qc, status, 1); |
624d5c51 TH |
1516 | |
1517 | /* another command or interrupt handler | |
1518 | * may be running at this point. | |
1519 | */ | |
1520 | if (poll_next) | |
1521 | goto fsm_start; | |
1522 | } | |
1523 | ||
1524 | /** | |
9363c382 | 1525 | * ata_sff_qc_issue - issue taskfile to device in proto-dependent manner |
624d5c51 TH |
1526 | * @qc: command to issue to device |
1527 | * | |
1528 | * Using various libata functions and hooks, this function | |
1529 | * starts an ATA command. ATA commands are grouped into | |
1530 | * classes called "protocols", and issuing each type of protocol | |
1531 | * is slightly different. | |
1532 | * | |
1533 | * May be used as the qc_issue() entry in ata_port_operations. | |
1534 | * | |
1535 | * LOCKING: | |
1536 | * spin_lock_irqsave(host lock) | |
1537 | * | |
1538 | * RETURNS: | |
1539 | * Zero on success, AC_ERR_* mask on failure | |
1540 | */ | |
9363c382 | 1541 | unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc) |
624d5c51 TH |
1542 | { |
1543 | struct ata_port *ap = qc->ap; | |
1544 | ||
1545 | /* Use polling pio if the LLD doesn't handle | |
1546 | * interrupt driven pio and atapi CDB interrupt. | |
1547 | */ | |
1548 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
1549 | switch (qc->tf.protocol) { | |
1550 | case ATA_PROT_PIO: | |
1551 | case ATA_PROT_NODATA: | |
1552 | case ATAPI_PROT_PIO: | |
1553 | case ATAPI_PROT_NODATA: | |
1554 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
1555 | break; | |
1556 | case ATAPI_PROT_DMA: | |
1557 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
1558 | /* see ata_dma_blacklisted() */ | |
1559 | BUG(); | |
1560 | break; | |
1561 | default: | |
1562 | break; | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | /* select the device */ | |
1567 | ata_dev_select(ap, qc->dev->devno, 1, 0); | |
1568 | ||
1569 | /* start the command */ | |
1570 | switch (qc->tf.protocol) { | |
1571 | case ATA_PROT_NODATA: | |
1572 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1573 | ata_qc_set_polling(qc); | |
1574 | ||
1575 | ata_tf_to_host(ap, &qc->tf); | |
1576 | ap->hsm_task_state = HSM_ST_LAST; | |
1577 | ||
1578 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1579 | ata_pio_queue_task(ap, qc, 0); | |
1580 | ||
1581 | break; | |
1582 | ||
1583 | case ATA_PROT_DMA: | |
efcb3cf7 | 1584 | WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING); |
624d5c51 | 1585 | |
5682ed33 | 1586 | ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ |
624d5c51 TH |
1587 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
1588 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
1589 | ap->hsm_task_state = HSM_ST_LAST; | |
1590 | break; | |
1591 | ||
1592 | case ATA_PROT_PIO: | |
1593 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1594 | ata_qc_set_polling(qc); | |
1595 | ||
1596 | ata_tf_to_host(ap, &qc->tf); | |
1597 | ||
1598 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
1599 | /* PIO data out protocol */ | |
1600 | ap->hsm_task_state = HSM_ST_FIRST; | |
1601 | ata_pio_queue_task(ap, qc, 0); | |
1602 | ||
1603 | /* always send first data block using | |
1604 | * the ata_pio_task() codepath. | |
1605 | */ | |
1606 | } else { | |
1607 | /* PIO data in protocol */ | |
1608 | ap->hsm_task_state = HSM_ST; | |
1609 | ||
1610 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1611 | ata_pio_queue_task(ap, qc, 0); | |
1612 | ||
1613 | /* if polling, ata_pio_task() handles the rest. | |
1614 | * otherwise, interrupt handler takes over from here. | |
1615 | */ | |
1616 | } | |
1617 | ||
1618 | break; | |
1619 | ||
1620 | case ATAPI_PROT_PIO: | |
1621 | case ATAPI_PROT_NODATA: | |
1622 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1623 | ata_qc_set_polling(qc); | |
1624 | ||
1625 | ata_tf_to_host(ap, &qc->tf); | |
1626 | ||
1627 | ap->hsm_task_state = HSM_ST_FIRST; | |
1628 | ||
1629 | /* send cdb by polling if no cdb interrupt */ | |
1630 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
1631 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
1632 | ata_pio_queue_task(ap, qc, 0); | |
1633 | break; | |
1634 | ||
1635 | case ATAPI_PROT_DMA: | |
efcb3cf7 | 1636 | WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING); |
624d5c51 | 1637 | |
5682ed33 | 1638 | ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ |
624d5c51 TH |
1639 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
1640 | ap->hsm_task_state = HSM_ST_FIRST; | |
1641 | ||
1642 | /* send cdb by polling if no cdb interrupt */ | |
1643 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1644 | ata_pio_queue_task(ap, qc, 0); | |
1645 | break; | |
1646 | ||
1647 | default: | |
efcb3cf7 | 1648 | WARN_ON_ONCE(1); |
624d5c51 TH |
1649 | return AC_ERR_SYSTEM; |
1650 | } | |
1651 | ||
1652 | return 0; | |
1653 | } | |
0fe40ff8 | 1654 | EXPORT_SYMBOL_GPL(ata_sff_qc_issue); |
624d5c51 | 1655 | |
22183bf5 TH |
1656 | /** |
1657 | * ata_sff_qc_fill_rtf - fill result TF using ->sff_tf_read | |
1658 | * @qc: qc to fill result TF for | |
1659 | * | |
1660 | * @qc is finished and result TF needs to be filled. Fill it | |
1661 | * using ->sff_tf_read. | |
1662 | * | |
1663 | * LOCKING: | |
1664 | * spin_lock_irqsave(host lock) | |
1665 | * | |
1666 | * RETURNS: | |
1667 | * true indicating that result TF is successfully filled. | |
1668 | */ | |
1669 | bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc) | |
1670 | { | |
1671 | qc->ap->ops->sff_tf_read(qc->ap, &qc->result_tf); | |
1672 | return true; | |
1673 | } | |
0fe40ff8 | 1674 | EXPORT_SYMBOL_GPL(ata_sff_qc_fill_rtf); |
22183bf5 | 1675 | |
624d5c51 | 1676 | /** |
9363c382 | 1677 | * ata_sff_host_intr - Handle host interrupt for given (port, task) |
624d5c51 TH |
1678 | * @ap: Port on which interrupt arrived (possibly...) |
1679 | * @qc: Taskfile currently active in engine | |
1680 | * | |
1681 | * Handle host interrupt for given queued command. Currently, | |
1682 | * only DMA interrupts are handled. All other commands are | |
1683 | * handled via polling with interrupts disabled (nIEN bit). | |
1684 | * | |
1685 | * LOCKING: | |
1686 | * spin_lock_irqsave(host lock) | |
1687 | * | |
1688 | * RETURNS: | |
1689 | * One if interrupt was handled, zero if not (shared irq). | |
1690 | */ | |
c96f1732 | 1691 | unsigned int ata_sff_host_intr(struct ata_port *ap, |
9363c382 | 1692 | struct ata_queued_cmd *qc) |
624d5c51 TH |
1693 | { |
1694 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
1695 | u8 status, host_stat = 0; | |
332ac7ff | 1696 | bool bmdma_stopped = false; |
624d5c51 TH |
1697 | |
1698 | VPRINTK("ata%u: protocol %d task_state %d\n", | |
1699 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); | |
1700 | ||
1701 | /* Check whether we are expecting interrupt in this state */ | |
1702 | switch (ap->hsm_task_state) { | |
1703 | case HSM_ST_FIRST: | |
1704 | /* Some pre-ATAPI-4 devices assert INTRQ | |
1705 | * at this state when ready to receive CDB. | |
1706 | */ | |
1707 | ||
1708 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. | |
1709 | * The flag was turned on only for atapi devices. No | |
1710 | * need to check ata_is_atapi(qc->tf.protocol) again. | |
1711 | */ | |
1712 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1713 | goto idle_irq; | |
1714 | break; | |
1715 | case HSM_ST_LAST: | |
1716 | if (qc->tf.protocol == ATA_PROT_DMA || | |
1717 | qc->tf.protocol == ATAPI_PROT_DMA) { | |
1718 | /* check status of DMA engine */ | |
1719 | host_stat = ap->ops->bmdma_status(ap); | |
1720 | VPRINTK("ata%u: host_stat 0x%X\n", | |
1721 | ap->print_id, host_stat); | |
1722 | ||
1723 | /* if it's not our irq... */ | |
1724 | if (!(host_stat & ATA_DMA_INTR)) | |
1725 | goto idle_irq; | |
1726 | ||
1727 | /* before we do anything else, clear DMA-Start bit */ | |
1728 | ap->ops->bmdma_stop(qc); | |
332ac7ff | 1729 | bmdma_stopped = true; |
624d5c51 TH |
1730 | |
1731 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
1732 | /* error when transfering data to/from memory */ | |
1733 | qc->err_mask |= AC_ERR_HOST_BUS; | |
1734 | ap->hsm_task_state = HSM_ST_ERR; | |
1735 | } | |
1736 | } | |
1737 | break; | |
1738 | case HSM_ST: | |
1739 | break; | |
1740 | default: | |
1741 | goto idle_irq; | |
1742 | } | |
1743 | ||
624d5c51 | 1744 | |
a57c1bad AC |
1745 | /* check main status, clearing INTRQ if needed */ |
1746 | status = ata_sff_irq_status(ap); | |
332ac7ff TH |
1747 | if (status & ATA_BUSY) { |
1748 | if (bmdma_stopped) { | |
1749 | /* BMDMA engine is already stopped, we're screwed */ | |
1750 | qc->err_mask |= AC_ERR_HSM; | |
1751 | ap->hsm_task_state = HSM_ST_ERR; | |
1752 | } else | |
1753 | goto idle_irq; | |
1754 | } | |
624d5c51 TH |
1755 | |
1756 | /* ack bmdma irq events */ | |
5682ed33 | 1757 | ap->ops->sff_irq_clear(ap); |
624d5c51 | 1758 | |
9363c382 | 1759 | ata_sff_hsm_move(ap, qc, status, 0); |
624d5c51 TH |
1760 | |
1761 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
1762 | qc->tf.protocol == ATAPI_PROT_DMA)) | |
1763 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
1764 | ||
1765 | return 1; /* irq handled */ | |
1766 | ||
1767 | idle_irq: | |
1768 | ap->stats.idle_irq++; | |
1769 | ||
1770 | #ifdef ATA_IRQ_TRAP | |
1771 | if ((ap->stats.idle_irq % 1000) == 0) { | |
5682ed33 TH |
1772 | ap->ops->sff_check_status(ap); |
1773 | ap->ops->sff_irq_clear(ap); | |
624d5c51 TH |
1774 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
1775 | return 1; | |
1776 | } | |
1777 | #endif | |
1778 | return 0; /* irq not handled */ | |
1779 | } | |
0fe40ff8 | 1780 | EXPORT_SYMBOL_GPL(ata_sff_host_intr); |
624d5c51 TH |
1781 | |
1782 | /** | |
9363c382 | 1783 | * ata_sff_interrupt - Default ATA host interrupt handler |
624d5c51 TH |
1784 | * @irq: irq line (unused) |
1785 | * @dev_instance: pointer to our ata_host information structure | |
1786 | * | |
1787 | * Default interrupt handler for PCI IDE devices. Calls | |
9363c382 | 1788 | * ata_sff_host_intr() for each port that is not disabled. |
624d5c51 TH |
1789 | * |
1790 | * LOCKING: | |
1791 | * Obtains host lock during operation. | |
1792 | * | |
1793 | * RETURNS: | |
1794 | * IRQ_NONE or IRQ_HANDLED. | |
1795 | */ | |
9363c382 | 1796 | irqreturn_t ata_sff_interrupt(int irq, void *dev_instance) |
624d5c51 TH |
1797 | { |
1798 | struct ata_host *host = dev_instance; | |
332ac7ff | 1799 | bool retried = false; |
624d5c51 | 1800 | unsigned int i; |
332ac7ff | 1801 | unsigned int handled, idle, polling; |
624d5c51 TH |
1802 | unsigned long flags; |
1803 | ||
1804 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
1805 | spin_lock_irqsave(&host->lock, flags); | |
1806 | ||
332ac7ff TH |
1807 | retry: |
1808 | handled = idle = polling = 0; | |
624d5c51 | 1809 | for (i = 0; i < host->n_ports; i++) { |
d88ec2e5 TH |
1810 | struct ata_port *ap = host->ports[i]; |
1811 | struct ata_queued_cmd *qc; | |
624d5c51 | 1812 | |
d88ec2e5 TH |
1813 | if (unlikely(ap->flags & ATA_FLAG_DISABLED)) |
1814 | continue; | |
624d5c51 | 1815 | |
d88ec2e5 | 1816 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
27943620 TH |
1817 | if (qc) { |
1818 | if (!(qc->tf.flags & ATA_TFLAG_POLLING)) | |
1819 | handled |= ata_sff_host_intr(ap, qc); | |
1820 | else | |
1821 | polling |= 1 << i; | |
332ac7ff TH |
1822 | } else |
1823 | idle |= 1 << i; | |
27943620 TH |
1824 | } |
1825 | ||
1826 | /* | |
1827 | * If no port was expecting IRQ but the controller is actually | |
1828 | * asserting IRQ line, nobody cared will ensue. Check IRQ | |
1829 | * pending status if available and clear spurious IRQ. | |
1830 | */ | |
332ac7ff TH |
1831 | if (!handled && !retried) { |
1832 | bool retry = false; | |
1833 | ||
27943620 TH |
1834 | for (i = 0; i < host->n_ports; i++) { |
1835 | struct ata_port *ap = host->ports[i]; | |
1836 | ||
1837 | if (polling & (1 << i)) | |
1838 | continue; | |
1839 | ||
1840 | if (!ap->ops->sff_irq_check || | |
1841 | !ap->ops->sff_irq_check(ap)) | |
1842 | continue; | |
1843 | ||
332ac7ff TH |
1844 | if (idle & (1 << i)) { |
1845 | ap->ops->sff_check_status(ap); | |
1846 | ap->ops->sff_irq_clear(ap); | |
1847 | } else { | |
1848 | /* clear INTRQ and check if BUSY cleared */ | |
1849 | if (!(ap->ops->sff_check_status(ap) & ATA_BUSY)) | |
1850 | retry |= true; | |
1851 | /* | |
1852 | * With command in flight, we can't do | |
1853 | * sff_irq_clear() w/o racing with completion. | |
1854 | */ | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | if (retry) { | |
1859 | retried = true; | |
1860 | goto retry; | |
27943620 | 1861 | } |
624d5c51 TH |
1862 | } |
1863 | ||
1864 | spin_unlock_irqrestore(&host->lock, flags); | |
1865 | ||
1866 | return IRQ_RETVAL(handled); | |
1867 | } | |
0fe40ff8 | 1868 | EXPORT_SYMBOL_GPL(ata_sff_interrupt); |
624d5c51 | 1869 | |
c96f1732 AC |
1870 | /** |
1871 | * ata_sff_lost_interrupt - Check for an apparent lost interrupt | |
1872 | * @ap: port that appears to have timed out | |
1873 | * | |
1874 | * Called from the libata error handlers when the core code suspects | |
1875 | * an interrupt has been lost. If it has complete anything we can and | |
1876 | * then return. Interface must support altstatus for this faster | |
1877 | * recovery to occur. | |
1878 | * | |
1879 | * Locking: | |
1880 | * Caller holds host lock | |
1881 | */ | |
1882 | ||
1883 | void ata_sff_lost_interrupt(struct ata_port *ap) | |
1884 | { | |
1885 | u8 status; | |
1886 | struct ata_queued_cmd *qc; | |
1887 | ||
1888 | /* Only one outstanding command per SFF channel */ | |
1889 | qc = ata_qc_from_tag(ap, ap->link.active_tag); | |
1890 | /* Check we have a live one.. */ | |
1891 | if (qc == NULL || !(qc->flags & ATA_QCFLAG_ACTIVE)) | |
1892 | return; | |
1893 | /* We cannot lose an interrupt on a polled command */ | |
1894 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
1895 | return; | |
1896 | /* See if the controller thinks it is still busy - if so the command | |
1897 | isn't a lost IRQ but is still in progress */ | |
1898 | status = ata_sff_altstatus(ap); | |
1899 | if (status & ATA_BUSY) | |
1900 | return; | |
1901 | ||
1902 | /* There was a command running, we are no longer busy and we have | |
1903 | no interrupt. */ | |
1904 | ata_port_printk(ap, KERN_WARNING, "lost interrupt (Status 0x%x)\n", | |
1905 | status); | |
1906 | /* Run the host interrupt logic as if the interrupt had not been | |
1907 | lost */ | |
1908 | ata_sff_host_intr(ap, qc); | |
1909 | } | |
1910 | EXPORT_SYMBOL_GPL(ata_sff_lost_interrupt); | |
1911 | ||
624d5c51 | 1912 | /** |
9363c382 | 1913 | * ata_sff_freeze - Freeze SFF controller port |
624d5c51 TH |
1914 | * @ap: port to freeze |
1915 | * | |
1916 | * Freeze BMDMA controller port. | |
1917 | * | |
1918 | * LOCKING: | |
1919 | * Inherited from caller. | |
1920 | */ | |
9363c382 | 1921 | void ata_sff_freeze(struct ata_port *ap) |
624d5c51 | 1922 | { |
624d5c51 TH |
1923 | ap->ctl |= ATA_NIEN; |
1924 | ap->last_ctl = ap->ctl; | |
1925 | ||
41dec29b SS |
1926 | if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) |
1927 | ata_sff_set_devctl(ap, ap->ctl); | |
624d5c51 TH |
1928 | |
1929 | /* Under certain circumstances, some controllers raise IRQ on | |
1930 | * ATA_NIEN manipulation. Also, many controllers fail to mask | |
1931 | * previously pending IRQ on ATA_NIEN assertion. Clear it. | |
1932 | */ | |
5682ed33 | 1933 | ap->ops->sff_check_status(ap); |
624d5c51 | 1934 | |
5682ed33 | 1935 | ap->ops->sff_irq_clear(ap); |
624d5c51 | 1936 | } |
0fe40ff8 | 1937 | EXPORT_SYMBOL_GPL(ata_sff_freeze); |
624d5c51 TH |
1938 | |
1939 | /** | |
9363c382 | 1940 | * ata_sff_thaw - Thaw SFF controller port |
624d5c51 TH |
1941 | * @ap: port to thaw |
1942 | * | |
9363c382 | 1943 | * Thaw SFF controller port. |
624d5c51 TH |
1944 | * |
1945 | * LOCKING: | |
1946 | * Inherited from caller. | |
1947 | */ | |
9363c382 | 1948 | void ata_sff_thaw(struct ata_port *ap) |
272f7884 | 1949 | { |
624d5c51 | 1950 | /* clear & re-enable interrupts */ |
5682ed33 TH |
1951 | ap->ops->sff_check_status(ap); |
1952 | ap->ops->sff_irq_clear(ap); | |
e42a542b | 1953 | ata_sff_irq_on(ap); |
272f7884 | 1954 | } |
0fe40ff8 | 1955 | EXPORT_SYMBOL_GPL(ata_sff_thaw); |
272f7884 | 1956 | |
0aa1113d TH |
1957 | /** |
1958 | * ata_sff_prereset - prepare SFF link for reset | |
1959 | * @link: SFF link to be reset | |
1960 | * @deadline: deadline jiffies for the operation | |
1961 | * | |
1962 | * SFF link @link is about to be reset. Initialize it. It first | |
1963 | * calls ata_std_prereset() and wait for !BSY if the port is | |
1964 | * being softreset. | |
1965 | * | |
1966 | * LOCKING: | |
1967 | * Kernel thread context (may sleep) | |
1968 | * | |
1969 | * RETURNS: | |
1970 | * 0 on success, -errno otherwise. | |
1971 | */ | |
1972 | int ata_sff_prereset(struct ata_link *link, unsigned long deadline) | |
1973 | { | |
0aa1113d TH |
1974 | struct ata_eh_context *ehc = &link->eh_context; |
1975 | int rc; | |
1976 | ||
1977 | rc = ata_std_prereset(link, deadline); | |
1978 | if (rc) | |
1979 | return rc; | |
1980 | ||
1981 | /* if we're about to do hardreset, nothing more to do */ | |
1982 | if (ehc->i.action & ATA_EH_HARDRESET) | |
1983 | return 0; | |
1984 | ||
1985 | /* wait for !BSY if we don't know that no device is attached */ | |
1986 | if (!ata_link_offline(link)) { | |
705e76be | 1987 | rc = ata_sff_wait_ready(link, deadline); |
0aa1113d TH |
1988 | if (rc && rc != -ENODEV) { |
1989 | ata_link_printk(link, KERN_WARNING, "device not ready " | |
1990 | "(errno=%d), forcing hardreset\n", rc); | |
1991 | ehc->i.action |= ATA_EH_HARDRESET; | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | return 0; | |
1996 | } | |
0fe40ff8 | 1997 | EXPORT_SYMBOL_GPL(ata_sff_prereset); |
0aa1113d | 1998 | |
90088bb4 | 1999 | /** |
624d5c51 TH |
2000 | * ata_devchk - PATA device presence detection |
2001 | * @ap: ATA channel to examine | |
2002 | * @device: Device to examine (starting at zero) | |
90088bb4 | 2003 | * |
624d5c51 TH |
2004 | * This technique was originally described in |
2005 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
2006 | * later found its way into the ATA/ATAPI spec. | |
2007 | * | |
2008 | * Write a pattern to the ATA shadow registers, | |
2009 | * and if a device is present, it will respond by | |
2010 | * correctly storing and echoing back the | |
2011 | * ATA shadow register contents. | |
90088bb4 TH |
2012 | * |
2013 | * LOCKING: | |
624d5c51 | 2014 | * caller. |
90088bb4 | 2015 | */ |
624d5c51 | 2016 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
90088bb4 TH |
2017 | { |
2018 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
624d5c51 | 2019 | u8 nsect, lbal; |
90088bb4 | 2020 | |
5682ed33 | 2021 | ap->ops->sff_dev_select(ap, device); |
90088bb4 | 2022 | |
624d5c51 TH |
2023 | iowrite8(0x55, ioaddr->nsect_addr); |
2024 | iowrite8(0xaa, ioaddr->lbal_addr); | |
90088bb4 | 2025 | |
624d5c51 TH |
2026 | iowrite8(0xaa, ioaddr->nsect_addr); |
2027 | iowrite8(0x55, ioaddr->lbal_addr); | |
90088bb4 | 2028 | |
624d5c51 TH |
2029 | iowrite8(0x55, ioaddr->nsect_addr); |
2030 | iowrite8(0xaa, ioaddr->lbal_addr); | |
2031 | ||
2032 | nsect = ioread8(ioaddr->nsect_addr); | |
2033 | lbal = ioread8(ioaddr->lbal_addr); | |
2034 | ||
2035 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
2036 | return 1; /* we found a device */ | |
2037 | ||
2038 | return 0; /* nothing found */ | |
90088bb4 TH |
2039 | } |
2040 | ||
272f7884 | 2041 | /** |
9363c382 | 2042 | * ata_sff_dev_classify - Parse returned ATA device signature |
624d5c51 TH |
2043 | * @dev: ATA device to classify (starting at zero) |
2044 | * @present: device seems present | |
2045 | * @r_err: Value of error register on completion | |
272f7884 | 2046 | * |
624d5c51 TH |
2047 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
2048 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
2049 | * shadow registers, indicating the results of device detection | |
2050 | * and diagnostics. | |
272f7884 | 2051 | * |
624d5c51 TH |
2052 | * Select the ATA device, and read the values from the ATA shadow |
2053 | * registers. Then parse according to the Error register value, | |
2054 | * and the spec-defined values examined by ata_dev_classify(). | |
272f7884 TH |
2055 | * |
2056 | * LOCKING: | |
624d5c51 TH |
2057 | * caller. |
2058 | * | |
2059 | * RETURNS: | |
2060 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
272f7884 | 2061 | */ |
9363c382 | 2062 | unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, |
624d5c51 | 2063 | u8 *r_err) |
272f7884 | 2064 | { |
624d5c51 TH |
2065 | struct ata_port *ap = dev->link->ap; |
2066 | struct ata_taskfile tf; | |
2067 | unsigned int class; | |
2068 | u8 err; | |
2069 | ||
5682ed33 | 2070 | ap->ops->sff_dev_select(ap, dev->devno); |
624d5c51 TH |
2071 | |
2072 | memset(&tf, 0, sizeof(tf)); | |
2073 | ||
5682ed33 | 2074 | ap->ops->sff_tf_read(ap, &tf); |
624d5c51 TH |
2075 | err = tf.feature; |
2076 | if (r_err) | |
2077 | *r_err = err; | |
2078 | ||
2079 | /* see if device passed diags: continue and warn later */ | |
2080 | if (err == 0) | |
2081 | /* diagnostic fail : do nothing _YET_ */ | |
2082 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; | |
2083 | else if (err == 1) | |
2084 | /* do nothing */ ; | |
2085 | else if ((dev->devno == 0) && (err == 0x81)) | |
2086 | /* do nothing */ ; | |
2087 | else | |
2088 | return ATA_DEV_NONE; | |
272f7884 | 2089 | |
624d5c51 TH |
2090 | /* determine if device is ATA or ATAPI */ |
2091 | class = ata_dev_classify(&tf); | |
272f7884 | 2092 | |
624d5c51 TH |
2093 | if (class == ATA_DEV_UNKNOWN) { |
2094 | /* If the device failed diagnostic, it's likely to | |
2095 | * have reported incorrect device signature too. | |
2096 | * Assume ATA device if the device seems present but | |
2097 | * device signature is invalid with diagnostic | |
2098 | * failure. | |
2099 | */ | |
2100 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) | |
2101 | class = ATA_DEV_ATA; | |
2102 | else | |
2103 | class = ATA_DEV_NONE; | |
5682ed33 TH |
2104 | } else if ((class == ATA_DEV_ATA) && |
2105 | (ap->ops->sff_check_status(ap) == 0)) | |
624d5c51 TH |
2106 | class = ATA_DEV_NONE; |
2107 | ||
2108 | return class; | |
272f7884 | 2109 | } |
0fe40ff8 | 2110 | EXPORT_SYMBOL_GPL(ata_sff_dev_classify); |
272f7884 | 2111 | |
705e76be TH |
2112 | /** |
2113 | * ata_sff_wait_after_reset - wait for devices to become ready after reset | |
2114 | * @link: SFF link which is just reset | |
2115 | * @devmask: mask of present devices | |
2116 | * @deadline: deadline jiffies for the operation | |
2117 | * | |
2118 | * Wait devices attached to SFF @link to become ready after | |
2119 | * reset. It contains preceding 150ms wait to avoid accessing TF | |
2120 | * status register too early. | |
2121 | * | |
2122 | * LOCKING: | |
2123 | * Kernel thread context (may sleep). | |
2124 | * | |
2125 | * RETURNS: | |
2126 | * 0 on success, -ENODEV if some or all of devices in @devmask | |
2127 | * don't seem to exist. -errno on other errors. | |
2128 | */ | |
2129 | int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, | |
2130 | unsigned long deadline) | |
1fdffbce | 2131 | { |
705e76be | 2132 | struct ata_port *ap = link->ap; |
1fdffbce | 2133 | struct ata_ioports *ioaddr = &ap->ioaddr; |
624d5c51 TH |
2134 | unsigned int dev0 = devmask & (1 << 0); |
2135 | unsigned int dev1 = devmask & (1 << 1); | |
2136 | int rc, ret = 0; | |
1fdffbce | 2137 | |
341c2c95 | 2138 | msleep(ATA_WAIT_AFTER_RESET); |
705e76be TH |
2139 | |
2140 | /* always check readiness of the master device */ | |
2141 | rc = ata_sff_wait_ready(link, deadline); | |
2142 | /* -ENODEV means the odd clown forgot the D7 pulldown resistor | |
2143 | * and TF status is 0xff, bail out on it too. | |
624d5c51 | 2144 | */ |
705e76be TH |
2145 | if (rc) |
2146 | return rc; | |
1fdffbce | 2147 | |
624d5c51 TH |
2148 | /* if device 1 was found in ata_devchk, wait for register |
2149 | * access briefly, then wait for BSY to clear. | |
2150 | */ | |
2151 | if (dev1) { | |
2152 | int i; | |
1fdffbce | 2153 | |
5682ed33 | 2154 | ap->ops->sff_dev_select(ap, 1); |
1fdffbce | 2155 | |
624d5c51 TH |
2156 | /* Wait for register access. Some ATAPI devices fail |
2157 | * to set nsect/lbal after reset, so don't waste too | |
2158 | * much time on it. We're gonna wait for !BSY anyway. | |
2159 | */ | |
2160 | for (i = 0; i < 2; i++) { | |
2161 | u8 nsect, lbal; | |
2162 | ||
2163 | nsect = ioread8(ioaddr->nsect_addr); | |
2164 | lbal = ioread8(ioaddr->lbal_addr); | |
2165 | if ((nsect == 1) && (lbal == 1)) | |
2166 | break; | |
2167 | msleep(50); /* give drive a breather */ | |
2168 | } | |
2169 | ||
705e76be | 2170 | rc = ata_sff_wait_ready(link, deadline); |
624d5c51 TH |
2171 | if (rc) { |
2172 | if (rc != -ENODEV) | |
2173 | return rc; | |
2174 | ret = rc; | |
2175 | } | |
1fdffbce JG |
2176 | } |
2177 | ||
624d5c51 | 2178 | /* is all this really necessary? */ |
5682ed33 | 2179 | ap->ops->sff_dev_select(ap, 0); |
624d5c51 | 2180 | if (dev1) |
5682ed33 | 2181 | ap->ops->sff_dev_select(ap, 1); |
624d5c51 | 2182 | if (dev0) |
5682ed33 | 2183 | ap->ops->sff_dev_select(ap, 0); |
624d5c51 TH |
2184 | |
2185 | return ret; | |
1fdffbce | 2186 | } |
0fe40ff8 | 2187 | EXPORT_SYMBOL_GPL(ata_sff_wait_after_reset); |
1fdffbce | 2188 | |
624d5c51 TH |
2189 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
2190 | unsigned long deadline) | |
2cc432ee | 2191 | { |
624d5c51 | 2192 | struct ata_ioports *ioaddr = &ap->ioaddr; |
2cc432ee | 2193 | |
624d5c51 TH |
2194 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
2195 | ||
2196 | /* software reset. causes dev0 to be selected */ | |
2197 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
2198 | udelay(20); /* FIXME: flush */ | |
2199 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
2200 | udelay(20); /* FIXME: flush */ | |
2201 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
e3e4385f | 2202 | ap->last_ctl = ap->ctl; |
624d5c51 | 2203 | |
705e76be TH |
2204 | /* wait the port to become ready */ |
2205 | return ata_sff_wait_after_reset(&ap->link, devmask, deadline); | |
2cc432ee JG |
2206 | } |
2207 | ||
6d97dbd7 | 2208 | /** |
9363c382 | 2209 | * ata_sff_softreset - reset host port via ATA SRST |
624d5c51 TH |
2210 | * @link: ATA link to reset |
2211 | * @classes: resulting classes of attached devices | |
2212 | * @deadline: deadline jiffies for the operation | |
6d97dbd7 | 2213 | * |
624d5c51 | 2214 | * Reset host port using ATA SRST. |
6d97dbd7 TH |
2215 | * |
2216 | * LOCKING: | |
624d5c51 TH |
2217 | * Kernel thread context (may sleep) |
2218 | * | |
2219 | * RETURNS: | |
2220 | * 0 on success, -errno otherwise. | |
6d97dbd7 | 2221 | */ |
9363c382 | 2222 | int ata_sff_softreset(struct ata_link *link, unsigned int *classes, |
624d5c51 | 2223 | unsigned long deadline) |
6d97dbd7 | 2224 | { |
624d5c51 TH |
2225 | struct ata_port *ap = link->ap; |
2226 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2227 | unsigned int devmask = 0; | |
2228 | int rc; | |
2229 | u8 err; | |
6d97dbd7 | 2230 | |
624d5c51 | 2231 | DPRINTK("ENTER\n"); |
6d97dbd7 | 2232 | |
624d5c51 TH |
2233 | /* determine if device 0/1 are present */ |
2234 | if (ata_devchk(ap, 0)) | |
2235 | devmask |= (1 << 0); | |
2236 | if (slave_possible && ata_devchk(ap, 1)) | |
2237 | devmask |= (1 << 1); | |
2238 | ||
2239 | /* select device 0 again */ | |
5682ed33 | 2240 | ap->ops->sff_dev_select(ap, 0); |
624d5c51 TH |
2241 | |
2242 | /* issue bus reset */ | |
2243 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
2244 | rc = ata_bus_softreset(ap, devmask, deadline); | |
2245 | /* if link is occupied, -ENODEV too is an error */ | |
2246 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { | |
2247 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); | |
2248 | return rc; | |
2249 | } | |
0f0a3ad3 | 2250 | |
624d5c51 | 2251 | /* determine by signature whether we have ATA or ATAPI devices */ |
9363c382 | 2252 | classes[0] = ata_sff_dev_classify(&link->device[0], |
624d5c51 TH |
2253 | devmask & (1 << 0), &err); |
2254 | if (slave_possible && err != 0x81) | |
9363c382 | 2255 | classes[1] = ata_sff_dev_classify(&link->device[1], |
624d5c51 TH |
2256 | devmask & (1 << 1), &err); |
2257 | ||
624d5c51 TH |
2258 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
2259 | return 0; | |
6d97dbd7 | 2260 | } |
0fe40ff8 | 2261 | EXPORT_SYMBOL_GPL(ata_sff_softreset); |
6d97dbd7 TH |
2262 | |
2263 | /** | |
9363c382 | 2264 | * sata_sff_hardreset - reset host port via SATA phy reset |
624d5c51 TH |
2265 | * @link: link to reset |
2266 | * @class: resulting class of attached device | |
2267 | * @deadline: deadline jiffies for the operation | |
6d97dbd7 | 2268 | * |
624d5c51 TH |
2269 | * SATA phy-reset host port using DET bits of SControl register, |
2270 | * wait for !BSY and classify the attached device. | |
6d97dbd7 TH |
2271 | * |
2272 | * LOCKING: | |
624d5c51 TH |
2273 | * Kernel thread context (may sleep) |
2274 | * | |
2275 | * RETURNS: | |
2276 | * 0 on success, -errno otherwise. | |
6d97dbd7 | 2277 | */ |
9363c382 | 2278 | int sata_sff_hardreset(struct ata_link *link, unsigned int *class, |
624d5c51 | 2279 | unsigned long deadline) |
6d97dbd7 | 2280 | { |
9dadd45b TH |
2281 | struct ata_eh_context *ehc = &link->eh_context; |
2282 | const unsigned long *timing = sata_ehc_deb_timing(ehc); | |
2283 | bool online; | |
624d5c51 TH |
2284 | int rc; |
2285 | ||
9dadd45b TH |
2286 | rc = sata_link_hardreset(link, timing, deadline, &online, |
2287 | ata_sff_check_ready); | |
9dadd45b TH |
2288 | if (online) |
2289 | *class = ata_sff_dev_classify(link->device, 1, NULL); | |
624d5c51 TH |
2290 | |
2291 | DPRINTK("EXIT, class=%u\n", *class); | |
9dadd45b | 2292 | return rc; |
6d97dbd7 | 2293 | } |
0fe40ff8 | 2294 | EXPORT_SYMBOL_GPL(sata_sff_hardreset); |
6d97dbd7 | 2295 | |
203c75b8 TH |
2296 | /** |
2297 | * ata_sff_postreset - SFF postreset callback | |
2298 | * @link: the target SFF ata_link | |
2299 | * @classes: classes of attached devices | |
2300 | * | |
2301 | * This function is invoked after a successful reset. It first | |
2302 | * calls ata_std_postreset() and performs SFF specific postreset | |
2303 | * processing. | |
2304 | * | |
2305 | * LOCKING: | |
2306 | * Kernel thread context (may sleep) | |
2307 | */ | |
2308 | void ata_sff_postreset(struct ata_link *link, unsigned int *classes) | |
2309 | { | |
2310 | struct ata_port *ap = link->ap; | |
2311 | ||
2312 | ata_std_postreset(link, classes); | |
2313 | ||
2314 | /* is double-select really necessary? */ | |
2315 | if (classes[0] != ATA_DEV_NONE) | |
2316 | ap->ops->sff_dev_select(ap, 1); | |
2317 | if (classes[1] != ATA_DEV_NONE) | |
2318 | ap->ops->sff_dev_select(ap, 0); | |
2319 | ||
2320 | /* bail out if no device is present */ | |
2321 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
2322 | DPRINTK("EXIT, no device\n"); | |
2323 | return; | |
2324 | } | |
2325 | ||
2326 | /* set up device control */ | |
41dec29b SS |
2327 | if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) { |
2328 | ata_sff_set_devctl(ap, ap->ctl); | |
e3e4385f SM |
2329 | ap->last_ctl = ap->ctl; |
2330 | } | |
203c75b8 | 2331 | } |
0fe40ff8 | 2332 | EXPORT_SYMBOL_GPL(ata_sff_postreset); |
203c75b8 | 2333 | |
3d47aa8e AC |
2334 | /** |
2335 | * ata_sff_drain_fifo - Stock FIFO drain logic for SFF controllers | |
2336 | * @qc: command | |
2337 | * | |
2338 | * Drain the FIFO and device of any stuck data following a command | |
3ad2f3fb | 2339 | * failing to complete. In some cases this is necessary before a |
3d47aa8e AC |
2340 | * reset will recover the device. |
2341 | * | |
2342 | */ | |
2343 | ||
2344 | void ata_sff_drain_fifo(struct ata_queued_cmd *qc) | |
2345 | { | |
2346 | int count; | |
2347 | struct ata_port *ap; | |
2348 | ||
2349 | /* We only need to flush incoming data when a command was running */ | |
2350 | if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE) | |
2351 | return; | |
2352 | ||
2353 | ap = qc->ap; | |
2354 | /* Drain up to 64K of data before we give up this recovery method */ | |
2355 | for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) | |
9a8fd68b | 2356 | && count < 65536; count += 2) |
3d47aa8e AC |
2357 | ioread16(ap->ioaddr.data_addr); |
2358 | ||
2359 | /* Can become DEBUG later */ | |
2360 | if (count) | |
2361 | ata_port_printk(ap, KERN_DEBUG, | |
2362 | "drained %d bytes to clear DRQ.\n", count); | |
2363 | ||
2364 | } | |
2365 | EXPORT_SYMBOL_GPL(ata_sff_drain_fifo); | |
2366 | ||
6d97dbd7 | 2367 | /** |
9363c382 | 2368 | * ata_sff_error_handler - Stock error handler for BMDMA controller |
6d97dbd7 | 2369 | * @ap: port to handle error for |
6d97dbd7 | 2370 | * |
9363c382 | 2371 | * Stock error handler for SFF controller. It can handle both |
6d97dbd7 TH |
2372 | * PATA and SATA controllers. Many controllers should be able to |
2373 | * use this EH as-is or with some added handling before and | |
2374 | * after. | |
2375 | * | |
6d97dbd7 TH |
2376 | * LOCKING: |
2377 | * Kernel thread context (may sleep) | |
2378 | */ | |
9363c382 | 2379 | void ata_sff_error_handler(struct ata_port *ap) |
6d97dbd7 | 2380 | { |
a1efdaba TH |
2381 | ata_reset_fn_t softreset = ap->ops->softreset; |
2382 | ata_reset_fn_t hardreset = ap->ops->hardreset; | |
6d97dbd7 TH |
2383 | struct ata_queued_cmd *qc; |
2384 | unsigned long flags; | |
2385 | int thaw = 0; | |
2386 | ||
9af5c9c9 | 2387 | qc = __ata_qc_from_tag(ap, ap->link.active_tag); |
6d97dbd7 TH |
2388 | if (qc && !(qc->flags & ATA_QCFLAG_FAILED)) |
2389 | qc = NULL; | |
2390 | ||
2391 | /* reset PIO HSM and stop DMA engine */ | |
ba6a1308 | 2392 | spin_lock_irqsave(ap->lock, flags); |
6d97dbd7 | 2393 | |
6d97dbd7 TH |
2394 | ap->hsm_task_state = HSM_ST_IDLE; |
2395 | ||
ed82f964 TH |
2396 | if (ap->ioaddr.bmdma_addr && |
2397 | qc && (qc->tf.protocol == ATA_PROT_DMA || | |
0dc36888 | 2398 | qc->tf.protocol == ATAPI_PROT_DMA)) { |
6d97dbd7 TH |
2399 | u8 host_stat; |
2400 | ||
fbbb262d | 2401 | host_stat = ap->ops->bmdma_status(ap); |
6d97dbd7 | 2402 | |
6d97dbd7 TH |
2403 | /* BMDMA controllers indicate host bus error by |
2404 | * setting DMA_ERR bit and timing out. As it wasn't | |
2405 | * really a timeout event, adjust error mask and | |
2406 | * cancel frozen state. | |
2407 | */ | |
3d47aa8e AC |
2408 | if (qc->err_mask == AC_ERR_TIMEOUT |
2409 | && (host_stat & ATA_DMA_ERR)) { | |
6d97dbd7 TH |
2410 | qc->err_mask = AC_ERR_HOST_BUS; |
2411 | thaw = 1; | |
2412 | } | |
2413 | ||
2414 | ap->ops->bmdma_stop(qc); | |
2415 | } | |
2416 | ||
a57c1bad | 2417 | ata_sff_sync(ap); /* FIXME: We don't need this */ |
5682ed33 TH |
2418 | ap->ops->sff_check_status(ap); |
2419 | ap->ops->sff_irq_clear(ap); | |
3d47aa8e AC |
2420 | /* We *MUST* do FIFO draining before we issue a reset as several |
2421 | * devices helpfully clear their internal state and will lock solid | |
2422 | * if we touch the data port post reset. Pass qc in case anyone wants | |
2423 | * to do different PIO/DMA recovery or has per command fixups | |
2424 | */ | |
2425 | if (ap->ops->drain_fifo) | |
2426 | ap->ops->drain_fifo(qc); | |
6d97dbd7 | 2427 | |
ba6a1308 | 2428 | spin_unlock_irqrestore(ap->lock, flags); |
6d97dbd7 TH |
2429 | |
2430 | if (thaw) | |
2431 | ata_eh_thaw_port(ap); | |
2432 | ||
2433 | /* PIO and DMA engines have been stopped, perform recovery */ | |
6d97dbd7 | 2434 | |
57c9efdf TH |
2435 | /* Ignore ata_sff_softreset if ctl isn't accessible and |
2436 | * built-in hardresets if SCR access isn't available. | |
a1efdaba | 2437 | */ |
9363c382 | 2438 | if (softreset == ata_sff_softreset && !ap->ioaddr.ctl_addr) |
a1efdaba | 2439 | softreset = NULL; |
57c9efdf | 2440 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) |
a1efdaba | 2441 | hardreset = NULL; |
6d97dbd7 | 2442 | |
a1efdaba TH |
2443 | ata_do_eh(ap, ap->ops->prereset, softreset, hardreset, |
2444 | ap->ops->postreset); | |
6d97dbd7 | 2445 | } |
0fe40ff8 | 2446 | EXPORT_SYMBOL_GPL(ata_sff_error_handler); |
6d97dbd7 TH |
2447 | |
2448 | /** | |
9363c382 | 2449 | * ata_sff_post_internal_cmd - Stock post_internal_cmd for SFF controller |
6d97dbd7 TH |
2450 | * @qc: internal command to clean up |
2451 | * | |
2452 | * LOCKING: | |
2453 | * Kernel thread context (may sleep) | |
2454 | */ | |
9363c382 | 2455 | void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc) |
6d97dbd7 | 2456 | { |
570106df TH |
2457 | struct ata_port *ap = qc->ap; |
2458 | unsigned long flags; | |
2459 | ||
2460 | spin_lock_irqsave(ap->lock, flags); | |
2461 | ||
2462 | ap->hsm_task_state = HSM_ST_IDLE; | |
2463 | ||
2464 | if (ap->ioaddr.bmdma_addr) | |
294264a9 | 2465 | ap->ops->bmdma_stop(qc); |
570106df TH |
2466 | |
2467 | spin_unlock_irqrestore(ap->lock, flags); | |
6d97dbd7 | 2468 | } |
0fe40ff8 | 2469 | EXPORT_SYMBOL_GPL(ata_sff_post_internal_cmd); |
6d97dbd7 | 2470 | |
d92e74d3 AC |
2471 | /** |
2472 | * ata_sff_port_start - Set port up for dma. | |
2473 | * @ap: Port to initialize | |
2474 | * | |
2475 | * Called just after data structures for each port are | |
2476 | * initialized. Allocates space for PRD table if the device | |
2477 | * is DMA capable SFF. | |
2478 | * | |
2479 | * May be used as the port_start() entry in ata_port_operations. | |
2480 | * | |
2481 | * LOCKING: | |
2482 | * Inherited from caller. | |
2483 | */ | |
d92e74d3 AC |
2484 | int ata_sff_port_start(struct ata_port *ap) |
2485 | { | |
2486 | if (ap->ioaddr.bmdma_addr) | |
2487 | return ata_port_start(ap); | |
2488 | return 0; | |
2489 | } | |
0fe40ff8 | 2490 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
d92e74d3 | 2491 | |
e3cf95dd AC |
2492 | /** |
2493 | * ata_sff_port_start32 - Set port up for dma. | |
2494 | * @ap: Port to initialize | |
2495 | * | |
2496 | * Called just after data structures for each port are | |
2497 | * initialized. Allocates space for PRD table if the device | |
2498 | * is DMA capable SFF. | |
2499 | * | |
2500 | * May be used as the port_start() entry in ata_port_operations for | |
2501 | * devices that are capable of 32bit PIO. | |
2502 | * | |
2503 | * LOCKING: | |
2504 | * Inherited from caller. | |
2505 | */ | |
2506 | int ata_sff_port_start32(struct ata_port *ap) | |
2507 | { | |
2508 | ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE; | |
2509 | if (ap->ioaddr.bmdma_addr) | |
2510 | return ata_port_start(ap); | |
2511 | return 0; | |
2512 | } | |
2513 | EXPORT_SYMBOL_GPL(ata_sff_port_start32); | |
2514 | ||
624d5c51 | 2515 | /** |
9363c382 | 2516 | * ata_sff_std_ports - initialize ioaddr with standard port offsets. |
624d5c51 TH |
2517 | * @ioaddr: IO address structure to be initialized |
2518 | * | |
2519 | * Utility function which initializes data_addr, error_addr, | |
2520 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
2521 | * device_addr, status_addr, and command_addr to standard offsets | |
2522 | * relative to cmd_addr. | |
2523 | * | |
2524 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
2525 | */ | |
9363c382 | 2526 | void ata_sff_std_ports(struct ata_ioports *ioaddr) |
624d5c51 TH |
2527 | { |
2528 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
2529 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
2530 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
2531 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
2532 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
2533 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
2534 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
2535 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
2536 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
2537 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
2538 | } | |
0fe40ff8 | 2539 | EXPORT_SYMBOL_GPL(ata_sff_std_ports); |
624d5c51 | 2540 | |
9363c382 TH |
2541 | unsigned long ata_bmdma_mode_filter(struct ata_device *adev, |
2542 | unsigned long xfer_mask) | |
071ce34d TH |
2543 | { |
2544 | /* Filter out DMA modes if the device has been configured by | |
2545 | the BIOS as PIO only */ | |
2546 | ||
2547 | if (adev->link->ap->ioaddr.bmdma_addr == NULL) | |
2548 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
2549 | return xfer_mask; | |
2550 | } | |
0fe40ff8 | 2551 | EXPORT_SYMBOL_GPL(ata_bmdma_mode_filter); |
071ce34d | 2552 | |
272f7884 TH |
2553 | /** |
2554 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction | |
2555 | * @qc: Info associated with this ATA transaction. | |
2556 | * | |
2557 | * LOCKING: | |
2558 | * spin_lock_irqsave(host lock) | |
2559 | */ | |
2560 | void ata_bmdma_setup(struct ata_queued_cmd *qc) | |
2561 | { | |
2562 | struct ata_port *ap = qc->ap; | |
2563 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); | |
2564 | u8 dmactl; | |
2565 | ||
2566 | /* load PRD table addr. */ | |
2567 | mb(); /* make sure PRD table writes are visible to controller */ | |
2568 | iowrite32(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); | |
2569 | ||
2570 | /* specify data direction, triple-check start bit is clear */ | |
2571 | dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
2572 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); | |
2573 | if (!rw) | |
2574 | dmactl |= ATA_DMA_WR; | |
2575 | iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
2576 | ||
2577 | /* issue r/w command */ | |
5682ed33 | 2578 | ap->ops->sff_exec_command(ap, &qc->tf); |
272f7884 | 2579 | } |
0fe40ff8 | 2580 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
272f7884 TH |
2581 | |
2582 | /** | |
2583 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction | |
2584 | * @qc: Info associated with this ATA transaction. | |
2585 | * | |
2586 | * LOCKING: | |
2587 | * spin_lock_irqsave(host lock) | |
2588 | */ | |
2589 | void ata_bmdma_start(struct ata_queued_cmd *qc) | |
2590 | { | |
2591 | struct ata_port *ap = qc->ap; | |
2592 | u8 dmactl; | |
2593 | ||
2594 | /* start host DMA transaction */ | |
2595 | dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
2596 | iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
2597 | ||
2598 | /* Strictly, one may wish to issue an ioread8() here, to | |
2599 | * flush the mmio write. However, control also passes | |
2600 | * to the hardware at this point, and it will interrupt | |
2601 | * us when we are to resume control. So, in effect, | |
2602 | * we don't care when the mmio write flushes. | |
2603 | * Further, a read of the DMA status register _immediately_ | |
2604 | * following the write may not be what certain flaky hardware | |
2605 | * is expected, so I think it is best to not add a readb() | |
2606 | * without first all the MMIO ATA cards/mobos. | |
2607 | * Or maybe I'm just being paranoid. | |
2608 | * | |
2609 | * FIXME: The posting of this write means I/O starts are | |
2610 | * unneccessarily delayed for MMIO | |
2611 | */ | |
2612 | } | |
0fe40ff8 | 2613 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
272f7884 TH |
2614 | |
2615 | /** | |
2616 | * ata_bmdma_stop - Stop PCI IDE BMDMA transfer | |
2617 | * @qc: Command we are ending DMA for | |
2618 | * | |
2619 | * Clears the ATA_DMA_START flag in the dma control register | |
2620 | * | |
2621 | * May be used as the bmdma_stop() entry in ata_port_operations. | |
2622 | * | |
2623 | * LOCKING: | |
2624 | * spin_lock_irqsave(host lock) | |
2625 | */ | |
2626 | void ata_bmdma_stop(struct ata_queued_cmd *qc) | |
2627 | { | |
2628 | struct ata_port *ap = qc->ap; | |
2629 | void __iomem *mmio = ap->ioaddr.bmdma_addr; | |
2630 | ||
2631 | /* clear start/stop bit */ | |
2632 | iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, | |
2633 | mmio + ATA_DMA_CMD); | |
2634 | ||
2635 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ | |
a57c1bad | 2636 | ata_sff_dma_pause(ap); |
272f7884 | 2637 | } |
0fe40ff8 | 2638 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
272f7884 TH |
2639 | |
2640 | /** | |
2641 | * ata_bmdma_status - Read PCI IDE BMDMA status | |
2642 | * @ap: Port associated with this ATA transaction. | |
2643 | * | |
2644 | * Read and return BMDMA status register. | |
2645 | * | |
2646 | * May be used as the bmdma_status() entry in ata_port_operations. | |
2647 | * | |
2648 | * LOCKING: | |
2649 | * spin_lock_irqsave(host lock) | |
2650 | */ | |
2651 | u8 ata_bmdma_status(struct ata_port *ap) | |
2652 | { | |
2653 | return ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
2654 | } | |
0fe40ff8 | 2655 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
272f7884 | 2656 | |
1fdffbce | 2657 | #ifdef CONFIG_PCI |
4112e16a | 2658 | |
272f7884 | 2659 | /** |
9363c382 | 2660 | * ata_pci_bmdma_clear_simplex - attempt to kick device out of simplex |
272f7884 TH |
2661 | * @pdev: PCI device |
2662 | * | |
2663 | * Some PCI ATA devices report simplex mode but in fact can be told to | |
2664 | * enter non simplex mode. This implements the necessary logic to | |
2665 | * perform the task on such devices. Calling it on other devices will | |
2666 | * have -undefined- behaviour. | |
2667 | */ | |
9363c382 | 2668 | int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev) |
4112e16a | 2669 | { |
272f7884 TH |
2670 | unsigned long bmdma = pci_resource_start(pdev, 4); |
2671 | u8 simplex; | |
a84471fe | 2672 | |
272f7884 TH |
2673 | if (bmdma == 0) |
2674 | return -ENOENT; | |
2675 | ||
2676 | simplex = inb(bmdma + 0x02); | |
2677 | outb(simplex & 0x60, bmdma + 0x02); | |
2678 | simplex = inb(bmdma + 0x02); | |
2679 | if (simplex & 0x80) | |
2680 | return -EOPNOTSUPP; | |
2681 | return 0; | |
2682 | } | |
0fe40ff8 | 2683 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_clear_simplex); |
272f7884 | 2684 | |
0f834de3 | 2685 | /** |
9363c382 | 2686 | * ata_pci_bmdma_init - acquire PCI BMDMA resources and init ATA host |
0f834de3 TH |
2687 | * @host: target ATA host |
2688 | * | |
2689 | * Acquire PCI BMDMA resources and initialize @host accordingly. | |
2690 | * | |
2691 | * LOCKING: | |
2692 | * Inherited from calling layer (may sleep). | |
2693 | * | |
2694 | * RETURNS: | |
2695 | * 0 on success, -errno otherwise. | |
2696 | */ | |
9363c382 | 2697 | int ata_pci_bmdma_init(struct ata_host *host) |
1fdffbce | 2698 | { |
0f834de3 TH |
2699 | struct device *gdev = host->dev; |
2700 | struct pci_dev *pdev = to_pci_dev(gdev); | |
2701 | int i, rc; | |
0d5ff566 | 2702 | |
6fdc99a2 AC |
2703 | /* No BAR4 allocation: No DMA */ |
2704 | if (pci_resource_start(pdev, 4) == 0) | |
2705 | return 0; | |
2706 | ||
0f834de3 TH |
2707 | /* TODO: If we get no DMA mask we should fall back to PIO */ |
2708 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); | |
2709 | if (rc) | |
2710 | return rc; | |
2711 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); | |
2712 | if (rc) | |
2713 | return rc; | |
2714 | ||
2715 | /* request and iomap DMA region */ | |
35a10a80 | 2716 | rc = pcim_iomap_regions(pdev, 1 << 4, dev_driver_string(gdev)); |
0f834de3 TH |
2717 | if (rc) { |
2718 | dev_printk(KERN_ERR, gdev, "failed to request/iomap BAR4\n"); | |
2719 | return -ENOMEM; | |
0d5ff566 | 2720 | } |
0f834de3 | 2721 | host->iomap = pcim_iomap_table(pdev); |
0d5ff566 | 2722 | |
1626aeb8 | 2723 | for (i = 0; i < 2; i++) { |
0f834de3 | 2724 | struct ata_port *ap = host->ports[i]; |
0f834de3 TH |
2725 | void __iomem *bmdma = host->iomap[4] + 8 * i; |
2726 | ||
2727 | if (ata_port_is_dummy(ap)) | |
2728 | continue; | |
2729 | ||
21b0ad4f | 2730 | ap->ioaddr.bmdma_addr = bmdma; |
0f834de3 TH |
2731 | if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) && |
2732 | (ioread8(bmdma + 2) & 0x80)) | |
2733 | host->flags |= ATA_HOST_SIMPLEX; | |
cbcdd875 TH |
2734 | |
2735 | ata_port_desc(ap, "bmdma 0x%llx", | |
0fe40ff8 | 2736 | (unsigned long long)pci_resource_start(pdev, 4) + 8 * i); |
0d5ff566 TH |
2737 | } |
2738 | ||
0f834de3 TH |
2739 | return 0; |
2740 | } | |
0fe40ff8 | 2741 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_init); |
2ec7df04 | 2742 | |
272f7884 TH |
2743 | static int ata_resources_present(struct pci_dev *pdev, int port) |
2744 | { | |
2745 | int i; | |
2746 | ||
2747 | /* Check the PCI resources for this channel are enabled */ | |
2748 | port = port * 2; | |
0fe40ff8 | 2749 | for (i = 0; i < 2; i++) { |
272f7884 TH |
2750 | if (pci_resource_start(pdev, port + i) == 0 || |
2751 | pci_resource_len(pdev, port + i) == 0) | |
2752 | return 0; | |
2753 | } | |
2754 | return 1; | |
2755 | } | |
2756 | ||
d491b27b | 2757 | /** |
9363c382 | 2758 | * ata_pci_sff_init_host - acquire native PCI ATA resources and init host |
d491b27b | 2759 | * @host: target ATA host |
d491b27b | 2760 | * |
1626aeb8 TH |
2761 | * Acquire native PCI ATA resources for @host and initialize the |
2762 | * first two ports of @host accordingly. Ports marked dummy are | |
2763 | * skipped and allocation failure makes the port dummy. | |
d491b27b | 2764 | * |
d583bc18 TH |
2765 | * Note that native PCI resources are valid even for legacy hosts |
2766 | * as we fix up pdev resources array early in boot, so this | |
2767 | * function can be used for both native and legacy SFF hosts. | |
2768 | * | |
d491b27b TH |
2769 | * LOCKING: |
2770 | * Inherited from calling layer (may sleep). | |
2771 | * | |
2772 | * RETURNS: | |
1626aeb8 TH |
2773 | * 0 if at least one port is initialized, -ENODEV if no port is |
2774 | * available. | |
d491b27b | 2775 | */ |
9363c382 | 2776 | int ata_pci_sff_init_host(struct ata_host *host) |
d491b27b TH |
2777 | { |
2778 | struct device *gdev = host->dev; | |
2779 | struct pci_dev *pdev = to_pci_dev(gdev); | |
1626aeb8 | 2780 | unsigned int mask = 0; |
d491b27b TH |
2781 | int i, rc; |
2782 | ||
d491b27b TH |
2783 | /* request, iomap BARs and init port addresses accordingly */ |
2784 | for (i = 0; i < 2; i++) { | |
2785 | struct ata_port *ap = host->ports[i]; | |
2786 | int base = i * 2; | |
2787 | void __iomem * const *iomap; | |
2788 | ||
1626aeb8 TH |
2789 | if (ata_port_is_dummy(ap)) |
2790 | continue; | |
2791 | ||
2792 | /* Discard disabled ports. Some controllers show | |
2793 | * their unused channels this way. Disabled ports are | |
2794 | * made dummy. | |
2795 | */ | |
2796 | if (!ata_resources_present(pdev, i)) { | |
2797 | ap->ops = &ata_dummy_port_ops; | |
d491b27b | 2798 | continue; |
1626aeb8 | 2799 | } |
d491b27b | 2800 | |
35a10a80 TH |
2801 | rc = pcim_iomap_regions(pdev, 0x3 << base, |
2802 | dev_driver_string(gdev)); | |
d491b27b | 2803 | if (rc) { |
1626aeb8 TH |
2804 | dev_printk(KERN_WARNING, gdev, |
2805 | "failed to request/iomap BARs for port %d " | |
2806 | "(errno=%d)\n", i, rc); | |
d491b27b TH |
2807 | if (rc == -EBUSY) |
2808 | pcim_pin_device(pdev); | |
1626aeb8 TH |
2809 | ap->ops = &ata_dummy_port_ops; |
2810 | continue; | |
d491b27b TH |
2811 | } |
2812 | host->iomap = iomap = pcim_iomap_table(pdev); | |
2813 | ||
2814 | ap->ioaddr.cmd_addr = iomap[base]; | |
2815 | ap->ioaddr.altstatus_addr = | |
2816 | ap->ioaddr.ctl_addr = (void __iomem *) | |
2817 | ((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS); | |
9363c382 | 2818 | ata_sff_std_ports(&ap->ioaddr); |
1626aeb8 | 2819 | |
cbcdd875 TH |
2820 | ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx", |
2821 | (unsigned long long)pci_resource_start(pdev, base), | |
2822 | (unsigned long long)pci_resource_start(pdev, base + 1)); | |
2823 | ||
1626aeb8 TH |
2824 | mask |= 1 << i; |
2825 | } | |
2826 | ||
2827 | if (!mask) { | |
2828 | dev_printk(KERN_ERR, gdev, "no available native port\n"); | |
2829 | return -ENODEV; | |
d491b27b TH |
2830 | } |
2831 | ||
2832 | return 0; | |
2833 | } | |
0fe40ff8 | 2834 | EXPORT_SYMBOL_GPL(ata_pci_sff_init_host); |
d491b27b | 2835 | |
21b0ad4f | 2836 | /** |
9363c382 | 2837 | * ata_pci_sff_prepare_host - helper to prepare native PCI ATA host |
21b0ad4f | 2838 | * @pdev: target PCI device |
1626aeb8 | 2839 | * @ppi: array of port_info, must be enough for two ports |
21b0ad4f TH |
2840 | * @r_host: out argument for the initialized ATA host |
2841 | * | |
2842 | * Helper to allocate ATA host for @pdev, acquire all native PCI | |
2843 | * resources and initialize it accordingly in one go. | |
2844 | * | |
2845 | * LOCKING: | |
2846 | * Inherited from calling layer (may sleep). | |
2847 | * | |
2848 | * RETURNS: | |
2849 | * 0 on success, -errno otherwise. | |
2850 | */ | |
9363c382 | 2851 | int ata_pci_sff_prepare_host(struct pci_dev *pdev, |
0fe40ff8 | 2852 | const struct ata_port_info * const *ppi, |
d583bc18 | 2853 | struct ata_host **r_host) |
21b0ad4f TH |
2854 | { |
2855 | struct ata_host *host; | |
21b0ad4f TH |
2856 | int rc; |
2857 | ||
2858 | if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) | |
2859 | return -ENOMEM; | |
2860 | ||
2861 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2); | |
2862 | if (!host) { | |
2863 | dev_printk(KERN_ERR, &pdev->dev, | |
2864 | "failed to allocate ATA host\n"); | |
2865 | rc = -ENOMEM; | |
2866 | goto err_out; | |
2867 | } | |
2868 | ||
9363c382 | 2869 | rc = ata_pci_sff_init_host(host); |
21b0ad4f TH |
2870 | if (rc) |
2871 | goto err_out; | |
2872 | ||
2873 | /* init DMA related stuff */ | |
9363c382 | 2874 | rc = ata_pci_bmdma_init(host); |
21b0ad4f TH |
2875 | if (rc) |
2876 | goto err_bmdma; | |
2877 | ||
2878 | devres_remove_group(&pdev->dev, NULL); | |
2879 | *r_host = host; | |
2880 | return 0; | |
2881 | ||
0fe40ff8 | 2882 | err_bmdma: |
21b0ad4f TH |
2883 | /* This is necessary because PCI and iomap resources are |
2884 | * merged and releasing the top group won't release the | |
2885 | * acquired resources if some of those have been acquired | |
2886 | * before entering this function. | |
2887 | */ | |
2888 | pcim_iounmap_regions(pdev, 0xf); | |
0fe40ff8 | 2889 | err_out: |
21b0ad4f TH |
2890 | devres_release_group(&pdev->dev, NULL); |
2891 | return rc; | |
2892 | } | |
0fe40ff8 | 2893 | EXPORT_SYMBOL_GPL(ata_pci_sff_prepare_host); |
21b0ad4f | 2894 | |
4e6b79fa | 2895 | /** |
9363c382 | 2896 | * ata_pci_sff_activate_host - start SFF host, request IRQ and register it |
4e6b79fa TH |
2897 | * @host: target SFF ATA host |
2898 | * @irq_handler: irq_handler used when requesting IRQ(s) | |
2899 | * @sht: scsi_host_template to use when registering the host | |
2900 | * | |
2901 | * This is the counterpart of ata_host_activate() for SFF ATA | |
2902 | * hosts. This separate helper is necessary because SFF hosts | |
2903 | * use two separate interrupts in legacy mode. | |
2904 | * | |
2905 | * LOCKING: | |
2906 | * Inherited from calling layer (may sleep). | |
2907 | * | |
2908 | * RETURNS: | |
2909 | * 0 on success, -errno otherwise. | |
2910 | */ | |
9363c382 | 2911 | int ata_pci_sff_activate_host(struct ata_host *host, |
4e6b79fa TH |
2912 | irq_handler_t irq_handler, |
2913 | struct scsi_host_template *sht) | |
2914 | { | |
2915 | struct device *dev = host->dev; | |
2916 | struct pci_dev *pdev = to_pci_dev(dev); | |
2917 | const char *drv_name = dev_driver_string(host->dev); | |
2918 | int legacy_mode = 0, rc; | |
2919 | ||
2920 | rc = ata_host_start(host); | |
2921 | if (rc) | |
2922 | return rc; | |
2923 | ||
2924 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { | |
2925 | u8 tmp8, mask; | |
2926 | ||
2927 | /* TODO: What if one channel is in native mode ... */ | |
2928 | pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); | |
2929 | mask = (1 << 2) | (1 << 0); | |
2930 | if ((tmp8 & mask) != mask) | |
2931 | legacy_mode = 1; | |
2932 | #if defined(CONFIG_NO_ATA_LEGACY) | |
2933 | /* Some platforms with PCI limits cannot address compat | |
2934 | port space. In that case we punt if their firmware has | |
2935 | left a device in compatibility mode */ | |
2936 | if (legacy_mode) { | |
2937 | printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n"); | |
2938 | return -EOPNOTSUPP; | |
2939 | } | |
2940 | #endif | |
2941 | } | |
2942 | ||
2943 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
2944 | return -ENOMEM; | |
2945 | ||
2946 | if (!legacy_mode && pdev->irq) { | |
2947 | rc = devm_request_irq(dev, pdev->irq, irq_handler, | |
2948 | IRQF_SHARED, drv_name, host); | |
2949 | if (rc) | |
2950 | goto out; | |
2951 | ||
2952 | ata_port_desc(host->ports[0], "irq %d", pdev->irq); | |
2953 | ata_port_desc(host->ports[1], "irq %d", pdev->irq); | |
2954 | } else if (legacy_mode) { | |
2955 | if (!ata_port_is_dummy(host->ports[0])) { | |
2956 | rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev), | |
2957 | irq_handler, IRQF_SHARED, | |
2958 | drv_name, host); | |
2959 | if (rc) | |
2960 | goto out; | |
2961 | ||
2962 | ata_port_desc(host->ports[0], "irq %d", | |
2963 | ATA_PRIMARY_IRQ(pdev)); | |
2964 | } | |
2965 | ||
2966 | if (!ata_port_is_dummy(host->ports[1])) { | |
2967 | rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev), | |
2968 | irq_handler, IRQF_SHARED, | |
2969 | drv_name, host); | |
2970 | if (rc) | |
2971 | goto out; | |
2972 | ||
2973 | ata_port_desc(host->ports[1], "irq %d", | |
2974 | ATA_SECONDARY_IRQ(pdev)); | |
2975 | } | |
2976 | } | |
2977 | ||
2978 | rc = ata_host_register(host, sht); | |
0fe40ff8 | 2979 | out: |
4e6b79fa TH |
2980 | if (rc == 0) |
2981 | devres_remove_group(dev, NULL); | |
2982 | else | |
2983 | devres_release_group(dev, NULL); | |
2984 | ||
2985 | return rc; | |
2986 | } | |
0fe40ff8 | 2987 | EXPORT_SYMBOL_GPL(ata_pci_sff_activate_host); |
4e6b79fa | 2988 | |
1fdffbce | 2989 | /** |
9363c382 | 2990 | * ata_pci_sff_init_one - Initialize/register PCI IDE host controller |
1fdffbce | 2991 | * @pdev: Controller to be initialized |
1626aeb8 | 2992 | * @ppi: array of port_info, must be enough for two ports |
1bd5b715 | 2993 | * @sht: scsi_host_template to use when registering the host |
887125e3 | 2994 | * @host_priv: host private_data |
16ea0fc9 | 2995 | * @hflag: host flags |
1fdffbce JG |
2996 | * |
2997 | * This is a helper function which can be called from a driver's | |
2998 | * xxx_init_one() probe function if the hardware uses traditional | |
2999 | * IDE taskfile registers. | |
3000 | * | |
3001 | * This function calls pci_enable_device(), reserves its register | |
3002 | * regions, sets the dma mask, enables bus master mode, and calls | |
3003 | * ata_device_add() | |
3004 | * | |
2ec7df04 AC |
3005 | * ASSUMPTION: |
3006 | * Nobody makes a single channel controller that appears solely as | |
3007 | * the secondary legacy port on PCI. | |
3008 | * | |
1fdffbce JG |
3009 | * LOCKING: |
3010 | * Inherited from PCI layer (may sleep). | |
3011 | * | |
3012 | * RETURNS: | |
3013 | * Zero on success, negative on errno-based value on error. | |
3014 | */ | |
9363c382 | 3015 | int ata_pci_sff_init_one(struct pci_dev *pdev, |
16ea0fc9 AC |
3016 | const struct ata_port_info * const *ppi, |
3017 | struct scsi_host_template *sht, void *host_priv, int hflag) | |
1fdffbce | 3018 | { |
f0d36efd | 3019 | struct device *dev = &pdev->dev; |
1626aeb8 | 3020 | const struct ata_port_info *pi = NULL; |
0f834de3 | 3021 | struct ata_host *host = NULL; |
1626aeb8 | 3022 | int i, rc; |
1fdffbce JG |
3023 | |
3024 | DPRINTK("ENTER\n"); | |
3025 | ||
1626aeb8 TH |
3026 | /* look up the first valid port_info */ |
3027 | for (i = 0; i < 2 && ppi[i]; i++) { | |
3028 | if (ppi[i]->port_ops != &ata_dummy_port_ops) { | |
3029 | pi = ppi[i]; | |
3030 | break; | |
3031 | } | |
3032 | } | |
f0d36efd | 3033 | |
1626aeb8 TH |
3034 | if (!pi) { |
3035 | dev_printk(KERN_ERR, &pdev->dev, | |
3036 | "no valid port_info specified\n"); | |
3037 | return -EINVAL; | |
3038 | } | |
c791c306 | 3039 | |
1626aeb8 TH |
3040 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
3041 | return -ENOMEM; | |
1fdffbce | 3042 | |
f0d36efd | 3043 | rc = pcim_enable_device(pdev); |
1fdffbce | 3044 | if (rc) |
4e6b79fa | 3045 | goto out; |
1fdffbce | 3046 | |
4e6b79fa | 3047 | /* prepare and activate SFF host */ |
9363c382 | 3048 | rc = ata_pci_sff_prepare_host(pdev, ppi, &host); |
d583bc18 | 3049 | if (rc) |
4e6b79fa | 3050 | goto out; |
887125e3 | 3051 | host->private_data = host_priv; |
16ea0fc9 | 3052 | host->flags |= hflag; |
d491b27b | 3053 | |
d491b27b | 3054 | pci_set_master(pdev); |
9363c382 | 3055 | rc = ata_pci_sff_activate_host(host, ata_sff_interrupt, sht); |
0fe40ff8 | 3056 | out: |
4e6b79fa TH |
3057 | if (rc == 0) |
3058 | devres_remove_group(&pdev->dev, NULL); | |
3059 | else | |
3060 | devres_release_group(&pdev->dev, NULL); | |
d491b27b | 3061 | |
1fdffbce JG |
3062 | return rc; |
3063 | } | |
0fe40ff8 | 3064 | EXPORT_SYMBOL_GPL(ata_pci_sff_init_one); |
1fdffbce JG |
3065 | |
3066 | #endif /* CONFIG_PCI */ |