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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 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 | * | |
1da177e4 LT |
33 | */ |
34 | ||
35 | #include <linux/config.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/pci.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/list.h> | |
41 | #include <linux/mm.h> | |
42 | #include <linux/highmem.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/blkdev.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/interrupt.h> | |
48 | #include <linux/completion.h> | |
49 | #include <linux/suspend.h> | |
50 | #include <linux/workqueue.h> | |
67846b30 | 51 | #include <linux/jiffies.h> |
378f058c | 52 | #include <linux/scatterlist.h> |
1da177e4 | 53 | #include <scsi/scsi.h> |
1da177e4 | 54 | #include "scsi_priv.h" |
193515d5 | 55 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
56 | #include <scsi/scsi_host.h> |
57 | #include <linux/libata.h> | |
58 | #include <asm/io.h> | |
59 | #include <asm/semaphore.h> | |
60 | #include <asm/byteorder.h> | |
61 | ||
62 | #include "libata.h" | |
63 | ||
6aff8f1f TH |
64 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
65 | struct ata_device *dev); | |
1da177e4 LT |
66 | static void ata_set_mode(struct ata_port *ap); |
67 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); | |
057ace5e | 68 | static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift); |
1da177e4 | 69 | static int fgb(u32 bitmap); |
057ace5e | 70 | static int ata_choose_xfer_mode(const struct ata_port *ap, |
1da177e4 LT |
71 | u8 *xfer_mode_out, |
72 | unsigned int *xfer_shift_out); | |
1da177e4 LT |
73 | |
74 | static unsigned int ata_unique_id = 1; | |
75 | static struct workqueue_struct *ata_wq; | |
76 | ||
1623c81e JG |
77 | int atapi_enabled = 0; |
78 | module_param(atapi_enabled, int, 0444); | |
79 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
80 | ||
c3c013a2 JG |
81 | int libata_fua = 0; |
82 | module_param_named(fua, libata_fua, int, 0444); | |
83 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
84 | ||
1da177e4 LT |
85 | MODULE_AUTHOR("Jeff Garzik"); |
86 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
87 | MODULE_LICENSE("GPL"); | |
88 | MODULE_VERSION(DRV_VERSION); | |
89 | ||
0baab86b | 90 | |
1da177e4 LT |
91 | /** |
92 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
93 | * @tf: Taskfile to convert | |
94 | * @fis: Buffer into which data will output | |
95 | * @pmp: Port multiplier port | |
96 | * | |
97 | * Converts a standard ATA taskfile to a Serial ATA | |
98 | * FIS structure (Register - Host to Device). | |
99 | * | |
100 | * LOCKING: | |
101 | * Inherited from caller. | |
102 | */ | |
103 | ||
057ace5e | 104 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
105 | { |
106 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
107 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
108 | bit 7 indicates Command FIS */ | |
109 | fis[2] = tf->command; | |
110 | fis[3] = tf->feature; | |
111 | ||
112 | fis[4] = tf->lbal; | |
113 | fis[5] = tf->lbam; | |
114 | fis[6] = tf->lbah; | |
115 | fis[7] = tf->device; | |
116 | ||
117 | fis[8] = tf->hob_lbal; | |
118 | fis[9] = tf->hob_lbam; | |
119 | fis[10] = tf->hob_lbah; | |
120 | fis[11] = tf->hob_feature; | |
121 | ||
122 | fis[12] = tf->nsect; | |
123 | fis[13] = tf->hob_nsect; | |
124 | fis[14] = 0; | |
125 | fis[15] = tf->ctl; | |
126 | ||
127 | fis[16] = 0; | |
128 | fis[17] = 0; | |
129 | fis[18] = 0; | |
130 | fis[19] = 0; | |
131 | } | |
132 | ||
133 | /** | |
134 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
135 | * @fis: Buffer from which data will be input | |
136 | * @tf: Taskfile to output | |
137 | * | |
e12a1be6 | 138 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
139 | * |
140 | * LOCKING: | |
141 | * Inherited from caller. | |
142 | */ | |
143 | ||
057ace5e | 144 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
145 | { |
146 | tf->command = fis[2]; /* status */ | |
147 | tf->feature = fis[3]; /* error */ | |
148 | ||
149 | tf->lbal = fis[4]; | |
150 | tf->lbam = fis[5]; | |
151 | tf->lbah = fis[6]; | |
152 | tf->device = fis[7]; | |
153 | ||
154 | tf->hob_lbal = fis[8]; | |
155 | tf->hob_lbam = fis[9]; | |
156 | tf->hob_lbah = fis[10]; | |
157 | ||
158 | tf->nsect = fis[12]; | |
159 | tf->hob_nsect = fis[13]; | |
160 | } | |
161 | ||
8cbd6df1 AL |
162 | static const u8 ata_rw_cmds[] = { |
163 | /* pio multi */ | |
164 | ATA_CMD_READ_MULTI, | |
165 | ATA_CMD_WRITE_MULTI, | |
166 | ATA_CMD_READ_MULTI_EXT, | |
167 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
168 | 0, |
169 | 0, | |
170 | 0, | |
171 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
172 | /* pio */ |
173 | ATA_CMD_PIO_READ, | |
174 | ATA_CMD_PIO_WRITE, | |
175 | ATA_CMD_PIO_READ_EXT, | |
176 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
177 | 0, |
178 | 0, | |
179 | 0, | |
180 | 0, | |
8cbd6df1 AL |
181 | /* dma */ |
182 | ATA_CMD_READ, | |
183 | ATA_CMD_WRITE, | |
184 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
185 | ATA_CMD_WRITE_EXT, |
186 | 0, | |
187 | 0, | |
188 | 0, | |
189 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 190 | }; |
1da177e4 LT |
191 | |
192 | /** | |
8cbd6df1 AL |
193 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
194 | * @qc: command to examine and configure | |
1da177e4 | 195 | * |
8cbd6df1 AL |
196 | * Examine the device configuration and tf->flags to calculate |
197 | * the proper read/write commands and protocol to use. | |
1da177e4 LT |
198 | * |
199 | * LOCKING: | |
200 | * caller. | |
201 | */ | |
9a3dccc4 | 202 | int ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
1da177e4 | 203 | { |
8cbd6df1 AL |
204 | struct ata_taskfile *tf = &qc->tf; |
205 | struct ata_device *dev = qc->dev; | |
9a3dccc4 | 206 | u8 cmd; |
1da177e4 | 207 | |
9a3dccc4 | 208 | int index, fua, lba48, write; |
8cbd6df1 | 209 | |
9a3dccc4 | 210 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
211 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
212 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 213 | |
8cbd6df1 AL |
214 | if (dev->flags & ATA_DFLAG_PIO) { |
215 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 216 | index = dev->multi_count ? 0 : 8; |
8d238e01 AC |
217 | } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { |
218 | /* Unable to use DMA due to host limitation */ | |
219 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 220 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
221 | } else { |
222 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 223 | index = 16; |
8cbd6df1 | 224 | } |
1da177e4 | 225 | |
9a3dccc4 TH |
226 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
227 | if (cmd) { | |
228 | tf->command = cmd; | |
229 | return 0; | |
230 | } | |
231 | return -1; | |
1da177e4 LT |
232 | } |
233 | ||
98ac62de | 234 | static const char * const xfer_mode_str[] = { |
1da177e4 LT |
235 | "UDMA/16", |
236 | "UDMA/25", | |
237 | "UDMA/33", | |
238 | "UDMA/44", | |
239 | "UDMA/66", | |
240 | "UDMA/100", | |
241 | "UDMA/133", | |
242 | "UDMA7", | |
243 | "MWDMA0", | |
244 | "MWDMA1", | |
245 | "MWDMA2", | |
246 | "PIO0", | |
247 | "PIO1", | |
248 | "PIO2", | |
249 | "PIO3", | |
250 | "PIO4", | |
251 | }; | |
252 | ||
253 | /** | |
254 | * ata_udma_string - convert UDMA bit offset to string | |
255 | * @mask: mask of bits supported; only highest bit counts. | |
256 | * | |
257 | * Determine string which represents the highest speed | |
258 | * (highest bit in @udma_mask). | |
259 | * | |
260 | * LOCKING: | |
261 | * None. | |
262 | * | |
263 | * RETURNS: | |
264 | * Constant C string representing highest speed listed in | |
265 | * @udma_mask, or the constant C string "<n/a>". | |
266 | */ | |
267 | ||
268 | static const char *ata_mode_string(unsigned int mask) | |
269 | { | |
270 | int i; | |
271 | ||
272 | for (i = 7; i >= 0; i--) | |
273 | if (mask & (1 << i)) | |
274 | goto out; | |
275 | for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--) | |
276 | if (mask & (1 << i)) | |
277 | goto out; | |
278 | for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--) | |
279 | if (mask & (1 << i)) | |
280 | goto out; | |
281 | ||
282 | return "<n/a>"; | |
283 | ||
284 | out: | |
285 | return xfer_mode_str[i]; | |
286 | } | |
287 | ||
288 | /** | |
289 | * ata_pio_devchk - PATA device presence detection | |
290 | * @ap: ATA channel to examine | |
291 | * @device: Device to examine (starting at zero) | |
292 | * | |
293 | * This technique was originally described in | |
294 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
295 | * later found its way into the ATA/ATAPI spec. | |
296 | * | |
297 | * Write a pattern to the ATA shadow registers, | |
298 | * and if a device is present, it will respond by | |
299 | * correctly storing and echoing back the | |
300 | * ATA shadow register contents. | |
301 | * | |
302 | * LOCKING: | |
303 | * caller. | |
304 | */ | |
305 | ||
306 | static unsigned int ata_pio_devchk(struct ata_port *ap, | |
307 | unsigned int device) | |
308 | { | |
309 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
310 | u8 nsect, lbal; | |
311 | ||
312 | ap->ops->dev_select(ap, device); | |
313 | ||
314 | outb(0x55, ioaddr->nsect_addr); | |
315 | outb(0xaa, ioaddr->lbal_addr); | |
316 | ||
317 | outb(0xaa, ioaddr->nsect_addr); | |
318 | outb(0x55, ioaddr->lbal_addr); | |
319 | ||
320 | outb(0x55, ioaddr->nsect_addr); | |
321 | outb(0xaa, ioaddr->lbal_addr); | |
322 | ||
323 | nsect = inb(ioaddr->nsect_addr); | |
324 | lbal = inb(ioaddr->lbal_addr); | |
325 | ||
326 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
327 | return 1; /* we found a device */ | |
328 | ||
329 | return 0; /* nothing found */ | |
330 | } | |
331 | ||
332 | /** | |
333 | * ata_mmio_devchk - PATA device presence detection | |
334 | * @ap: ATA channel to examine | |
335 | * @device: Device to examine (starting at zero) | |
336 | * | |
337 | * This technique was originally described in | |
338 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
339 | * later found its way into the ATA/ATAPI spec. | |
340 | * | |
341 | * Write a pattern to the ATA shadow registers, | |
342 | * and if a device is present, it will respond by | |
343 | * correctly storing and echoing back the | |
344 | * ATA shadow register contents. | |
345 | * | |
346 | * LOCKING: | |
347 | * caller. | |
348 | */ | |
349 | ||
350 | static unsigned int ata_mmio_devchk(struct ata_port *ap, | |
351 | unsigned int device) | |
352 | { | |
353 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
354 | u8 nsect, lbal; | |
355 | ||
356 | ap->ops->dev_select(ap, device); | |
357 | ||
358 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
359 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
360 | ||
361 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); | |
362 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); | |
363 | ||
364 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
365 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
366 | ||
367 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
368 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
369 | ||
370 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
371 | return 1; /* we found a device */ | |
372 | ||
373 | return 0; /* nothing found */ | |
374 | } | |
375 | ||
376 | /** | |
377 | * ata_devchk - PATA device presence detection | |
378 | * @ap: ATA channel to examine | |
379 | * @device: Device to examine (starting at zero) | |
380 | * | |
381 | * Dispatch ATA device presence detection, depending | |
382 | * on whether we are using PIO or MMIO to talk to the | |
383 | * ATA shadow registers. | |
384 | * | |
385 | * LOCKING: | |
386 | * caller. | |
387 | */ | |
388 | ||
389 | static unsigned int ata_devchk(struct ata_port *ap, | |
390 | unsigned int device) | |
391 | { | |
392 | if (ap->flags & ATA_FLAG_MMIO) | |
393 | return ata_mmio_devchk(ap, device); | |
394 | return ata_pio_devchk(ap, device); | |
395 | } | |
396 | ||
397 | /** | |
398 | * ata_dev_classify - determine device type based on ATA-spec signature | |
399 | * @tf: ATA taskfile register set for device to be identified | |
400 | * | |
401 | * Determine from taskfile register contents whether a device is | |
402 | * ATA or ATAPI, as per "Signature and persistence" section | |
403 | * of ATA/PI spec (volume 1, sect 5.14). | |
404 | * | |
405 | * LOCKING: | |
406 | * None. | |
407 | * | |
408 | * RETURNS: | |
409 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
410 | * the event of failure. | |
411 | */ | |
412 | ||
057ace5e | 413 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
414 | { |
415 | /* Apple's open source Darwin code hints that some devices only | |
416 | * put a proper signature into the LBA mid/high registers, | |
417 | * So, we only check those. It's sufficient for uniqueness. | |
418 | */ | |
419 | ||
420 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
421 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
422 | DPRINTK("found ATA device by sig\n"); | |
423 | return ATA_DEV_ATA; | |
424 | } | |
425 | ||
426 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
427 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
428 | DPRINTK("found ATAPI device by sig\n"); | |
429 | return ATA_DEV_ATAPI; | |
430 | } | |
431 | ||
432 | DPRINTK("unknown device\n"); | |
433 | return ATA_DEV_UNKNOWN; | |
434 | } | |
435 | ||
436 | /** | |
437 | * ata_dev_try_classify - Parse returned ATA device signature | |
438 | * @ap: ATA channel to examine | |
439 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 440 | * @r_err: Value of error register on completion |
1da177e4 LT |
441 | * |
442 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
443 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
444 | * shadow registers, indicating the results of device detection | |
445 | * and diagnostics. | |
446 | * | |
447 | * Select the ATA device, and read the values from the ATA shadow | |
448 | * registers. Then parse according to the Error register value, | |
449 | * and the spec-defined values examined by ata_dev_classify(). | |
450 | * | |
451 | * LOCKING: | |
452 | * caller. | |
b4dc7623 TH |
453 | * |
454 | * RETURNS: | |
455 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
456 | */ |
457 | ||
b4dc7623 TH |
458 | static unsigned int |
459 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) | |
1da177e4 | 460 | { |
1da177e4 LT |
461 | struct ata_taskfile tf; |
462 | unsigned int class; | |
463 | u8 err; | |
464 | ||
465 | ap->ops->dev_select(ap, device); | |
466 | ||
467 | memset(&tf, 0, sizeof(tf)); | |
468 | ||
1da177e4 | 469 | ap->ops->tf_read(ap, &tf); |
0169e284 | 470 | err = tf.feature; |
b4dc7623 TH |
471 | if (r_err) |
472 | *r_err = err; | |
1da177e4 LT |
473 | |
474 | /* see if device passed diags */ | |
475 | if (err == 1) | |
476 | /* do nothing */ ; | |
477 | else if ((device == 0) && (err == 0x81)) | |
478 | /* do nothing */ ; | |
479 | else | |
b4dc7623 | 480 | return ATA_DEV_NONE; |
1da177e4 | 481 | |
b4dc7623 | 482 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 483 | class = ata_dev_classify(&tf); |
b4dc7623 | 484 | |
1da177e4 | 485 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 486 | return ATA_DEV_NONE; |
1da177e4 | 487 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
488 | return ATA_DEV_NONE; |
489 | return class; | |
1da177e4 LT |
490 | } |
491 | ||
492 | /** | |
6a62a04d | 493 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
494 | * @id: IDENTIFY DEVICE results we will examine |
495 | * @s: string into which data is output | |
496 | * @ofs: offset into identify device page | |
497 | * @len: length of string to return. must be an even number. | |
498 | * | |
499 | * The strings in the IDENTIFY DEVICE page are broken up into | |
500 | * 16-bit chunks. Run through the string, and output each | |
501 | * 8-bit chunk linearly, regardless of platform. | |
502 | * | |
503 | * LOCKING: | |
504 | * caller. | |
505 | */ | |
506 | ||
6a62a04d TH |
507 | void ata_id_string(const u16 *id, unsigned char *s, |
508 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
509 | { |
510 | unsigned int c; | |
511 | ||
512 | while (len > 0) { | |
513 | c = id[ofs] >> 8; | |
514 | *s = c; | |
515 | s++; | |
516 | ||
517 | c = id[ofs] & 0xff; | |
518 | *s = c; | |
519 | s++; | |
520 | ||
521 | ofs++; | |
522 | len -= 2; | |
523 | } | |
524 | } | |
525 | ||
0e949ff3 | 526 | /** |
6a62a04d | 527 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
528 | * @id: IDENTIFY DEVICE results we will examine |
529 | * @s: string into which data is output | |
530 | * @ofs: offset into identify device page | |
531 | * @len: length of string to return. must be an odd number. | |
532 | * | |
6a62a04d | 533 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
534 | * trims trailing spaces and terminates the resulting string with |
535 | * null. @len must be actual maximum length (even number) + 1. | |
536 | * | |
537 | * LOCKING: | |
538 | * caller. | |
539 | */ | |
6a62a04d TH |
540 | void ata_id_c_string(const u16 *id, unsigned char *s, |
541 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
542 | { |
543 | unsigned char *p; | |
544 | ||
545 | WARN_ON(!(len & 1)); | |
546 | ||
6a62a04d | 547 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
548 | |
549 | p = s + strnlen(s, len - 1); | |
550 | while (p > s && p[-1] == ' ') | |
551 | p--; | |
552 | *p = '\0'; | |
553 | } | |
0baab86b | 554 | |
2940740b TH |
555 | static u64 ata_id_n_sectors(const u16 *id) |
556 | { | |
557 | if (ata_id_has_lba(id)) { | |
558 | if (ata_id_has_lba48(id)) | |
559 | return ata_id_u64(id, 100); | |
560 | else | |
561 | return ata_id_u32(id, 60); | |
562 | } else { | |
563 | if (ata_id_current_chs_valid(id)) | |
564 | return ata_id_u32(id, 57); | |
565 | else | |
566 | return id[1] * id[3] * id[6]; | |
567 | } | |
568 | } | |
569 | ||
0baab86b EF |
570 | /** |
571 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
572 | * @ap: ATA channel to manipulate | |
573 | * @device: ATA device (numbered from zero) to select | |
574 | * | |
575 | * This function performs no actual function. | |
576 | * | |
577 | * May be used as the dev_select() entry in ata_port_operations. | |
578 | * | |
579 | * LOCKING: | |
580 | * caller. | |
581 | */ | |
1da177e4 LT |
582 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
583 | { | |
584 | } | |
585 | ||
0baab86b | 586 | |
1da177e4 LT |
587 | /** |
588 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
589 | * @ap: ATA channel to manipulate | |
590 | * @device: ATA device (numbered from zero) to select | |
591 | * | |
592 | * Use the method defined in the ATA specification to | |
593 | * make either device 0, or device 1, active on the | |
0baab86b EF |
594 | * ATA channel. Works with both PIO and MMIO. |
595 | * | |
596 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
597 | * |
598 | * LOCKING: | |
599 | * caller. | |
600 | */ | |
601 | ||
602 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
603 | { | |
604 | u8 tmp; | |
605 | ||
606 | if (device == 0) | |
607 | tmp = ATA_DEVICE_OBS; | |
608 | else | |
609 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
610 | ||
611 | if (ap->flags & ATA_FLAG_MMIO) { | |
612 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); | |
613 | } else { | |
614 | outb(tmp, ap->ioaddr.device_addr); | |
615 | } | |
616 | ata_pause(ap); /* needed; also flushes, for mmio */ | |
617 | } | |
618 | ||
619 | /** | |
620 | * ata_dev_select - Select device 0/1 on ATA bus | |
621 | * @ap: ATA channel to manipulate | |
622 | * @device: ATA device (numbered from zero) to select | |
623 | * @wait: non-zero to wait for Status register BSY bit to clear | |
624 | * @can_sleep: non-zero if context allows sleeping | |
625 | * | |
626 | * Use the method defined in the ATA specification to | |
627 | * make either device 0, or device 1, active on the | |
628 | * ATA channel. | |
629 | * | |
630 | * This is a high-level version of ata_std_dev_select(), | |
631 | * which additionally provides the services of inserting | |
632 | * the proper pauses and status polling, where needed. | |
633 | * | |
634 | * LOCKING: | |
635 | * caller. | |
636 | */ | |
637 | ||
638 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
639 | unsigned int wait, unsigned int can_sleep) | |
640 | { | |
641 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", | |
642 | ap->id, device, wait); | |
643 | ||
644 | if (wait) | |
645 | ata_wait_idle(ap); | |
646 | ||
647 | ap->ops->dev_select(ap, device); | |
648 | ||
649 | if (wait) { | |
650 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
651 | msleep(150); | |
652 | ata_wait_idle(ap); | |
653 | } | |
654 | } | |
655 | ||
656 | /** | |
657 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 658 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 659 | * |
0bd3300a TH |
660 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
661 | * page. | |
1da177e4 LT |
662 | * |
663 | * LOCKING: | |
664 | * caller. | |
665 | */ | |
666 | ||
0bd3300a | 667 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
668 | { |
669 | DPRINTK("49==0x%04x " | |
670 | "53==0x%04x " | |
671 | "63==0x%04x " | |
672 | "64==0x%04x " | |
673 | "75==0x%04x \n", | |
0bd3300a TH |
674 | id[49], |
675 | id[53], | |
676 | id[63], | |
677 | id[64], | |
678 | id[75]); | |
1da177e4 LT |
679 | DPRINTK("80==0x%04x " |
680 | "81==0x%04x " | |
681 | "82==0x%04x " | |
682 | "83==0x%04x " | |
683 | "84==0x%04x \n", | |
0bd3300a TH |
684 | id[80], |
685 | id[81], | |
686 | id[82], | |
687 | id[83], | |
688 | id[84]); | |
1da177e4 LT |
689 | DPRINTK("88==0x%04x " |
690 | "93==0x%04x\n", | |
0bd3300a TH |
691 | id[88], |
692 | id[93]); | |
1da177e4 LT |
693 | } |
694 | ||
11e29e21 AC |
695 | /* |
696 | * Compute the PIO modes available for this device. This is not as | |
697 | * trivial as it seems if we must consider early devices correctly. | |
698 | * | |
699 | * FIXME: pre IDE drive timing (do we care ?). | |
700 | */ | |
701 | ||
057ace5e | 702 | static unsigned int ata_pio_modes(const struct ata_device *adev) |
11e29e21 AC |
703 | { |
704 | u16 modes; | |
705 | ||
ffa29456 AC |
706 | /* Usual case. Word 53 indicates word 64 is valid */ |
707 | if (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
11e29e21 AC |
708 | modes = adev->id[ATA_ID_PIO_MODES] & 0x03; |
709 | modes <<= 3; | |
710 | modes |= 0x7; | |
711 | return modes; | |
712 | } | |
713 | ||
ffa29456 AC |
714 | /* If word 64 isn't valid then Word 51 high byte holds the PIO timing |
715 | number for the maximum. Turn it into a mask and return it */ | |
716 | modes = (2 << ((adev->id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF)) - 1 ; | |
11e29e21 | 717 | return modes; |
ffa29456 AC |
718 | /* But wait.. there's more. Design your standards by committee and |
719 | you too can get a free iordy field to process. However its the | |
720 | speeds not the modes that are supported... Note drivers using the | |
721 | timing API will get this right anyway */ | |
11e29e21 AC |
722 | } |
723 | ||
95064379 TH |
724 | static inline void |
725 | ata_queue_packet_task(struct ata_port *ap) | |
726 | { | |
c18d06f8 TH |
727 | if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK)) |
728 | queue_work(ata_wq, &ap->packet_task); | |
95064379 TH |
729 | } |
730 | ||
731 | static inline void | |
732 | ata_queue_pio_task(struct ata_port *ap) | |
733 | { | |
c18d06f8 TH |
734 | if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK)) |
735 | queue_work(ata_wq, &ap->pio_task); | |
95064379 TH |
736 | } |
737 | ||
738 | static inline void | |
739 | ata_queue_delayed_pio_task(struct ata_port *ap, unsigned long delay) | |
740 | { | |
c18d06f8 TH |
741 | if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK)) |
742 | queue_delayed_work(ata_wq, &ap->pio_task, delay); | |
743 | } | |
744 | ||
745 | /** | |
746 | * ata_flush_pio_tasks - Flush pio_task and packet_task | |
747 | * @ap: the target ata_port | |
748 | * | |
749 | * After this function completes, pio_task and packet_task are | |
750 | * guranteed not to be running or scheduled. | |
751 | * | |
752 | * LOCKING: | |
753 | * Kernel thread context (may sleep) | |
754 | */ | |
755 | ||
756 | static void ata_flush_pio_tasks(struct ata_port *ap) | |
757 | { | |
758 | int tmp = 0; | |
759 | unsigned long flags; | |
760 | ||
761 | DPRINTK("ENTER\n"); | |
762 | ||
763 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
764 | ap->flags |= ATA_FLAG_FLUSH_PIO_TASK; | |
765 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
766 | ||
767 | DPRINTK("flush #1\n"); | |
768 | flush_workqueue(ata_wq); | |
769 | ||
770 | /* | |
771 | * At this point, if a task is running, it's guaranteed to see | |
772 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
773 | * Cancel and flush. | |
774 | */ | |
775 | tmp |= cancel_delayed_work(&ap->pio_task); | |
776 | tmp |= cancel_delayed_work(&ap->packet_task); | |
777 | if (!tmp) { | |
778 | DPRINTK("flush #2\n"); | |
779 | flush_workqueue(ata_wq); | |
780 | } | |
781 | ||
782 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
783 | ap->flags &= ~ATA_FLAG_FLUSH_PIO_TASK; | |
784 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
785 | ||
786 | DPRINTK("EXIT\n"); | |
95064379 TH |
787 | } |
788 | ||
77853bf2 | 789 | void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 790 | { |
77853bf2 | 791 | struct completion *waiting = qc->private_data; |
a2a7a662 | 792 | |
77853bf2 | 793 | qc->ap->ops->tf_read(qc->ap, &qc->tf); |
a2a7a662 | 794 | complete(waiting); |
a2a7a662 TH |
795 | } |
796 | ||
797 | /** | |
798 | * ata_exec_internal - execute libata internal command | |
799 | * @ap: Port to which the command is sent | |
800 | * @dev: Device to which the command is sent | |
801 | * @tf: Taskfile registers for the command and the result | |
802 | * @dma_dir: Data tranfer direction of the command | |
803 | * @buf: Data buffer of the command | |
804 | * @buflen: Length of data buffer | |
805 | * | |
806 | * Executes libata internal command with timeout. @tf contains | |
807 | * command on entry and result on return. Timeout and error | |
808 | * conditions are reported via return value. No recovery action | |
809 | * is taken after a command times out. It's caller's duty to | |
810 | * clean up after timeout. | |
811 | * | |
812 | * LOCKING: | |
813 | * None. Should be called with kernel context, might sleep. | |
814 | */ | |
815 | ||
816 | static unsigned | |
817 | ata_exec_internal(struct ata_port *ap, struct ata_device *dev, | |
818 | struct ata_taskfile *tf, | |
819 | int dma_dir, void *buf, unsigned int buflen) | |
820 | { | |
821 | u8 command = tf->command; | |
822 | struct ata_queued_cmd *qc; | |
823 | DECLARE_COMPLETION(wait); | |
824 | unsigned long flags; | |
77853bf2 | 825 | unsigned int err_mask; |
a2a7a662 TH |
826 | |
827 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
828 | ||
829 | qc = ata_qc_new_init(ap, dev); | |
830 | BUG_ON(qc == NULL); | |
831 | ||
832 | qc->tf = *tf; | |
833 | qc->dma_dir = dma_dir; | |
834 | if (dma_dir != DMA_NONE) { | |
835 | ata_sg_init_one(qc, buf, buflen); | |
836 | qc->nsect = buflen / ATA_SECT_SIZE; | |
837 | } | |
838 | ||
77853bf2 | 839 | qc->private_data = &wait; |
a2a7a662 TH |
840 | qc->complete_fn = ata_qc_complete_internal; |
841 | ||
9a3d9eb0 TH |
842 | qc->err_mask = ata_qc_issue(qc); |
843 | if (qc->err_mask) | |
8e436af9 | 844 | ata_qc_complete(qc); |
a2a7a662 TH |
845 | |
846 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
847 | ||
848 | if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) { | |
849 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
850 | ||
851 | /* We're racing with irq here. If we lose, the | |
852 | * following test prevents us from completing the qc | |
853 | * again. If completion irq occurs after here but | |
854 | * before the caller cleans up, it will result in a | |
855 | * spurious interrupt. We can live with that. | |
856 | */ | |
77853bf2 | 857 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
11a56d24 | 858 | qc->err_mask = AC_ERR_TIMEOUT; |
a2a7a662 TH |
859 | ata_qc_complete(qc); |
860 | printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n", | |
861 | ap->id, command); | |
862 | } | |
863 | ||
864 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
865 | } | |
866 | ||
77853bf2 TH |
867 | *tf = qc->tf; |
868 | err_mask = qc->err_mask; | |
869 | ||
870 | ata_qc_free(qc); | |
871 | ||
872 | return err_mask; | |
a2a7a662 TH |
873 | } |
874 | ||
1bc4ccff AC |
875 | /** |
876 | * ata_pio_need_iordy - check if iordy needed | |
877 | * @adev: ATA device | |
878 | * | |
879 | * Check if the current speed of the device requires IORDY. Used | |
880 | * by various controllers for chip configuration. | |
881 | */ | |
882 | ||
883 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) | |
884 | { | |
885 | int pio; | |
886 | int speed = adev->pio_mode - XFER_PIO_0; | |
887 | ||
888 | if (speed < 2) | |
889 | return 0; | |
890 | if (speed > 2) | |
891 | return 1; | |
892 | ||
893 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ | |
894 | ||
895 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ | |
896 | pio = adev->id[ATA_ID_EIDE_PIO]; | |
897 | /* Is the speed faster than the drive allows non IORDY ? */ | |
898 | if (pio) { | |
899 | /* This is cycle times not frequency - watch the logic! */ | |
900 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
901 | return 1; | |
902 | return 0; | |
903 | } | |
904 | } | |
905 | return 0; | |
906 | } | |
907 | ||
1da177e4 | 908 | /** |
49016aca TH |
909 | * ata_dev_read_id - Read ID data from the specified device |
910 | * @ap: port on which target device resides | |
911 | * @dev: target device | |
912 | * @p_class: pointer to class of the target device (may be changed) | |
913 | * @post_reset: is this read ID post-reset? | |
d9572b1d | 914 | * @p_id: read IDENTIFY page (newly allocated) |
1da177e4 | 915 | * |
49016aca TH |
916 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
917 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
918 | * devices. This function also takes care of EDD signature | |
919 | * misreporting (to be removed once EDD support is gone) and | |
920 | * issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives. | |
1da177e4 LT |
921 | * |
922 | * LOCKING: | |
49016aca TH |
923 | * Kernel thread context (may sleep) |
924 | * | |
925 | * RETURNS: | |
926 | * 0 on success, -errno otherwise. | |
1da177e4 | 927 | */ |
49016aca | 928 | static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, |
d9572b1d | 929 | unsigned int *p_class, int post_reset, u16 **p_id) |
1da177e4 | 930 | { |
49016aca | 931 | unsigned int class = *p_class; |
1da177e4 | 932 | unsigned int using_edd; |
a0123703 | 933 | struct ata_taskfile tf; |
49016aca | 934 | unsigned int err_mask = 0; |
d9572b1d | 935 | u16 *id; |
49016aca TH |
936 | const char *reason; |
937 | int rc; | |
1da177e4 | 938 | |
49016aca | 939 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 940 | |
61eb066a TH |
941 | if (ap->ops->probe_reset || |
942 | ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET)) | |
1da177e4 LT |
943 | using_edd = 0; |
944 | else | |
945 | using_edd = 1; | |
946 | ||
49016aca | 947 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 948 | |
d9572b1d TH |
949 | id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL); |
950 | if (id == NULL) { | |
951 | rc = -ENOMEM; | |
952 | reason = "out of memory"; | |
953 | goto err_out; | |
954 | } | |
955 | ||
49016aca TH |
956 | retry: |
957 | ata_tf_init(ap, &tf, dev->devno); | |
a0123703 | 958 | |
49016aca TH |
959 | switch (class) { |
960 | case ATA_DEV_ATA: | |
a0123703 | 961 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
962 | break; |
963 | case ATA_DEV_ATAPI: | |
a0123703 | 964 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
965 | break; |
966 | default: | |
967 | rc = -ENODEV; | |
968 | reason = "unsupported class"; | |
969 | goto err_out; | |
1da177e4 LT |
970 | } |
971 | ||
a0123703 | 972 | tf.protocol = ATA_PROT_PIO; |
1da177e4 | 973 | |
a0123703 | 974 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE, |
49016aca | 975 | id, sizeof(id[0]) * ATA_ID_WORDS); |
1da177e4 | 976 | |
a0123703 | 977 | if (err_mask) { |
49016aca TH |
978 | rc = -EIO; |
979 | reason = "I/O error"; | |
980 | ||
a0123703 TH |
981 | if (err_mask & ~AC_ERR_DEV) |
982 | goto err_out; | |
0169e284 | 983 | |
1da177e4 LT |
984 | /* |
985 | * arg! EDD works for all test cases, but seems to return | |
986 | * the ATA signature for some ATAPI devices. Until the | |
987 | * reason for this is found and fixed, we fix up the mess | |
988 | * here. If IDENTIFY DEVICE returns command aborted | |
989 | * (as ATAPI devices do), then we issue an | |
990 | * IDENTIFY PACKET DEVICE. | |
991 | * | |
992 | * ATA software reset (SRST, the default) does not appear | |
993 | * to have this problem. | |
994 | */ | |
49016aca | 995 | if ((using_edd) && (class == ATA_DEV_ATA)) { |
a0123703 | 996 | u8 err = tf.feature; |
1da177e4 | 997 | if (err & ATA_ABORTED) { |
49016aca | 998 | class = ATA_DEV_ATAPI; |
1da177e4 LT |
999 | goto retry; |
1000 | } | |
1001 | } | |
1002 | goto err_out; | |
1003 | } | |
1004 | ||
49016aca | 1005 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 LT |
1006 | |
1007 | /* print device capabilities */ | |
1008 | printk(KERN_DEBUG "ata%u: dev %u cfg " | |
1009 | "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", | |
49016aca TH |
1010 | ap->id, dev->devno, |
1011 | id[49], id[82], id[83], id[84], id[85], id[86], id[87], id[88]); | |
1012 | ||
1013 | /* sanity check */ | |
1014 | if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) { | |
1015 | rc = -EINVAL; | |
1016 | reason = "device reports illegal type"; | |
1017 | goto err_out; | |
1018 | } | |
1019 | ||
1020 | if (post_reset && class == ATA_DEV_ATA) { | |
1021 | /* | |
1022 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1023 | * SRST RESET | |
1024 | * IDENTIFY | |
1025 | * INITIALIZE DEVICE PARAMETERS | |
1026 | * anything else.. | |
1027 | * Some drives were very specific about that exact sequence. | |
1028 | */ | |
1029 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
1030 | err_mask = ata_dev_init_params(ap, dev); | |
1031 | if (err_mask) { | |
1032 | rc = -EIO; | |
1033 | reason = "INIT_DEV_PARAMS failed"; | |
1034 | goto err_out; | |
1035 | } | |
1036 | ||
1037 | /* current CHS translation info (id[53-58]) might be | |
1038 | * changed. reread the identify device info. | |
1039 | */ | |
1040 | post_reset = 0; | |
1041 | goto retry; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | *p_class = class; | |
d9572b1d | 1046 | *p_id = id; |
49016aca TH |
1047 | return 0; |
1048 | ||
1049 | err_out: | |
1050 | printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n", | |
1051 | ap->id, dev->devno, reason); | |
d9572b1d | 1052 | kfree(id); |
49016aca TH |
1053 | return rc; |
1054 | } | |
1055 | ||
4b2f3ede TH |
1056 | static inline u8 ata_dev_knobble(const struct ata_port *ap, |
1057 | struct ata_device *dev) | |
1058 | { | |
1059 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
1060 | } | |
1061 | ||
49016aca | 1062 | /** |
ffeae418 TH |
1063 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
1064 | * @ap: Port on which target device resides | |
1065 | * @dev: Target device to configure | |
1066 | * | |
1067 | * Configure @dev according to @dev->id. Generic and low-level | |
1068 | * driver specific fixups are also applied. | |
49016aca TH |
1069 | * |
1070 | * LOCKING: | |
ffeae418 TH |
1071 | * Kernel thread context (may sleep) |
1072 | * | |
1073 | * RETURNS: | |
1074 | * 0 on success, -errno otherwise | |
49016aca | 1075 | */ |
ffeae418 | 1076 | static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev) |
49016aca | 1077 | { |
49016aca TH |
1078 | unsigned long xfer_modes; |
1079 | int i, rc; | |
1080 | ||
1081 | if (!ata_dev_present(dev)) { | |
1082 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", | |
ffeae418 TH |
1083 | ap->id, dev->devno); |
1084 | return 0; | |
49016aca TH |
1085 | } |
1086 | ||
ffeae418 | 1087 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 LT |
1088 | |
1089 | /* | |
1090 | * common ATA, ATAPI feature tests | |
1091 | */ | |
1092 | ||
8bf62ece AL |
1093 | /* we require DMA support (bits 8 of word 49) */ |
1094 | if (!ata_id_has_dma(dev->id)) { | |
1095 | printk(KERN_DEBUG "ata%u: no dma\n", ap->id); | |
ffeae418 | 1096 | rc = -EINVAL; |
1da177e4 LT |
1097 | goto err_out_nosup; |
1098 | } | |
1099 | ||
1100 | /* quick-n-dirty find max transfer mode; for printk only */ | |
1101 | xfer_modes = dev->id[ATA_ID_UDMA_MODES]; | |
1102 | if (!xfer_modes) | |
1103 | xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA; | |
11e29e21 AC |
1104 | if (!xfer_modes) |
1105 | xfer_modes = ata_pio_modes(dev); | |
1da177e4 | 1106 | |
0bd3300a | 1107 | ata_dump_id(dev->id); |
1da177e4 LT |
1108 | |
1109 | /* ATA-specific feature tests */ | |
1110 | if (dev->class == ATA_DEV_ATA) { | |
2940740b TH |
1111 | dev->n_sectors = ata_id_n_sectors(dev->id); |
1112 | ||
8bf62ece AL |
1113 | if (ata_id_has_lba(dev->id)) { |
1114 | dev->flags |= ATA_DFLAG_LBA; | |
1115 | ||
2940740b | 1116 | if (ata_id_has_lba48(dev->id)) |
8bf62ece | 1117 | dev->flags |= ATA_DFLAG_LBA48; |
8bf62ece AL |
1118 | |
1119 | /* print device info to dmesg */ | |
1120 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n", | |
ffeae418 | 1121 | ap->id, dev->devno, |
49016aca | 1122 | ata_id_major_version(dev->id), |
8bf62ece AL |
1123 | ata_mode_string(xfer_modes), |
1124 | (unsigned long long)dev->n_sectors, | |
1125 | dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA"); | |
ffeae418 | 1126 | } else { |
8bf62ece AL |
1127 | /* CHS */ |
1128 | ||
1129 | /* Default translation */ | |
1130 | dev->cylinders = dev->id[1]; | |
1131 | dev->heads = dev->id[3]; | |
1132 | dev->sectors = dev->id[6]; | |
8bf62ece AL |
1133 | |
1134 | if (ata_id_current_chs_valid(dev->id)) { | |
1135 | /* Current CHS translation is valid. */ | |
1136 | dev->cylinders = dev->id[54]; | |
1137 | dev->heads = dev->id[55]; | |
1138 | dev->sectors = dev->id[56]; | |
8bf62ece AL |
1139 | } |
1140 | ||
1141 | /* print device info to dmesg */ | |
1142 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n", | |
ffeae418 | 1143 | ap->id, dev->devno, |
49016aca | 1144 | ata_id_major_version(dev->id), |
8bf62ece AL |
1145 | ata_mode_string(xfer_modes), |
1146 | (unsigned long long)dev->n_sectors, | |
1147 | (int)dev->cylinders, (int)dev->heads, (int)dev->sectors); | |
1da177e4 | 1148 | |
1da177e4 LT |
1149 | } |
1150 | ||
6e7846e9 | 1151 | dev->cdb_len = 16; |
1da177e4 LT |
1152 | } |
1153 | ||
1154 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1155 | else if (dev->class == ATA_DEV_ATAPI) { |
1da177e4 LT |
1156 | rc = atapi_cdb_len(dev->id); |
1157 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { | |
1158 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); | |
ffeae418 | 1159 | rc = -EINVAL; |
1da177e4 LT |
1160 | goto err_out_nosup; |
1161 | } | |
6e7846e9 | 1162 | dev->cdb_len = (unsigned int) rc; |
1da177e4 LT |
1163 | |
1164 | /* print device info to dmesg */ | |
1165 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", | |
ffeae418 | 1166 | ap->id, dev->devno, |
1da177e4 LT |
1167 | ata_mode_string(xfer_modes)); |
1168 | } | |
1169 | ||
6e7846e9 TH |
1170 | ap->host->max_cmd_len = 0; |
1171 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1172 | ap->host->max_cmd_len = max_t(unsigned int, | |
1173 | ap->host->max_cmd_len, | |
1174 | ap->device[i].cdb_len); | |
1175 | ||
4b2f3ede TH |
1176 | /* limit bridge transfers to udma5, 200 sectors */ |
1177 | if (ata_dev_knobble(ap, dev)) { | |
1178 | printk(KERN_INFO "ata%u(%u): applying bridge limits\n", | |
1179 | ap->id, dev->devno); | |
1180 | ap->udma_mask &= ATA_UDMA5; | |
1181 | dev->max_sectors = ATA_MAX_SECTORS; | |
1182 | } | |
1183 | ||
1184 | if (ap->ops->dev_config) | |
1185 | ap->ops->dev_config(ap, dev); | |
1186 | ||
1da177e4 | 1187 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
ffeae418 | 1188 | return 0; |
1da177e4 LT |
1189 | |
1190 | err_out_nosup: | |
1191 | printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n", | |
ffeae418 | 1192 | ap->id, dev->devno); |
1da177e4 | 1193 | DPRINTK("EXIT, err\n"); |
ffeae418 | 1194 | return rc; |
1da177e4 LT |
1195 | } |
1196 | ||
1197 | /** | |
1198 | * ata_bus_probe - Reset and probe ATA bus | |
1199 | * @ap: Bus to probe | |
1200 | * | |
0cba632b JG |
1201 | * Master ATA bus probing function. Initiates a hardware-dependent |
1202 | * bus reset, then attempts to identify any devices found on | |
1203 | * the bus. | |
1204 | * | |
1da177e4 | 1205 | * LOCKING: |
0cba632b | 1206 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1207 | * |
1208 | * RETURNS: | |
1209 | * Zero on success, non-zero on error. | |
1210 | */ | |
1211 | ||
1212 | static int ata_bus_probe(struct ata_port *ap) | |
1213 | { | |
1214 | unsigned int i, found = 0; | |
1215 | ||
c19ba8af TH |
1216 | if (ap->ops->probe_reset) { |
1217 | unsigned int classes[ATA_MAX_DEVICES]; | |
1218 | int rc; | |
1219 | ||
1220 | ata_port_probe(ap); | |
1221 | ||
1222 | rc = ap->ops->probe_reset(ap, classes); | |
1223 | if (rc == 0) { | |
06ab7822 TH |
1224 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
1225 | if (classes[i] == ATA_DEV_UNKNOWN) | |
1226 | classes[i] = ATA_DEV_NONE; | |
c19ba8af | 1227 | ap->device[i].class = classes[i]; |
06ab7822 | 1228 | } |
c19ba8af TH |
1229 | } else { |
1230 | printk(KERN_ERR "ata%u: probe reset failed, " | |
1231 | "disabling port\n", ap->id); | |
1232 | ata_port_disable(ap); | |
1233 | } | |
1234 | } else | |
1235 | ap->ops->phy_reset(ap); | |
1236 | ||
1da177e4 LT |
1237 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
1238 | goto err_out; | |
1239 | ||
1240 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
ffeae418 TH |
1241 | struct ata_device *dev = &ap->device[i]; |
1242 | ||
1243 | if (!ata_dev_present(dev)) | |
1244 | continue; | |
1245 | ||
1246 | WARN_ON(dev->id != NULL); | |
1247 | if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) { | |
1248 | dev->class = ATA_DEV_NONE; | |
1249 | continue; | |
1250 | } | |
1251 | ||
1252 | if (ata_dev_configure(ap, dev)) { | |
1253 | dev->class++; /* disable device */ | |
1254 | continue; | |
1da177e4 | 1255 | } |
ffeae418 | 1256 | |
ffeae418 | 1257 | found = 1; |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED)) | |
1261 | goto err_out_disable; | |
1262 | ||
1263 | ata_set_mode(ap); | |
1264 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1265 | goto err_out_disable; | |
1266 | ||
1267 | return 0; | |
1268 | ||
1269 | err_out_disable: | |
1270 | ap->ops->port_disable(ap); | |
1271 | err_out: | |
1272 | return -1; | |
1273 | } | |
1274 | ||
1275 | /** | |
0cba632b JG |
1276 | * ata_port_probe - Mark port as enabled |
1277 | * @ap: Port for which we indicate enablement | |
1da177e4 | 1278 | * |
0cba632b JG |
1279 | * Modify @ap data structure such that the system |
1280 | * thinks that the entire port is enabled. | |
1281 | * | |
1282 | * LOCKING: host_set lock, or some other form of | |
1283 | * serialization. | |
1da177e4 LT |
1284 | */ |
1285 | ||
1286 | void ata_port_probe(struct ata_port *ap) | |
1287 | { | |
1288 | ap->flags &= ~ATA_FLAG_PORT_DISABLED; | |
1289 | } | |
1290 | ||
3be680b7 TH |
1291 | /** |
1292 | * sata_print_link_status - Print SATA link status | |
1293 | * @ap: SATA port to printk link status about | |
1294 | * | |
1295 | * This function prints link speed and status of a SATA link. | |
1296 | * | |
1297 | * LOCKING: | |
1298 | * None. | |
1299 | */ | |
1300 | static void sata_print_link_status(struct ata_port *ap) | |
1301 | { | |
1302 | u32 sstatus, tmp; | |
1303 | const char *speed; | |
1304 | ||
1305 | if (!ap->ops->scr_read) | |
1306 | return; | |
1307 | ||
1308 | sstatus = scr_read(ap, SCR_STATUS); | |
1309 | ||
1310 | if (sata_dev_present(ap)) { | |
1311 | tmp = (sstatus >> 4) & 0xf; | |
1312 | if (tmp & (1 << 0)) | |
1313 | speed = "1.5"; | |
1314 | else if (tmp & (1 << 1)) | |
1315 | speed = "3.0"; | |
1316 | else | |
1317 | speed = "<unknown>"; | |
1318 | printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n", | |
1319 | ap->id, speed, sstatus); | |
1320 | } else { | |
1321 | printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n", | |
1322 | ap->id, sstatus); | |
1323 | } | |
1324 | } | |
1325 | ||
1da177e4 | 1326 | /** |
780a87f7 JG |
1327 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
1328 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1329 | * |
780a87f7 JG |
1330 | * This function issues commands to standard SATA Sxxx |
1331 | * PHY registers, to wake up the phy (and device), and | |
1332 | * clear any reset condition. | |
1da177e4 LT |
1333 | * |
1334 | * LOCKING: | |
0cba632b | 1335 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1336 | * |
1337 | */ | |
1338 | void __sata_phy_reset(struct ata_port *ap) | |
1339 | { | |
1340 | u32 sstatus; | |
1341 | unsigned long timeout = jiffies + (HZ * 5); | |
1342 | ||
1343 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e BR |
1344 | /* issue phy wake/reset */ |
1345 | scr_write_flush(ap, SCR_CONTROL, 0x301); | |
62ba2841 TH |
1346 | /* Couldn't find anything in SATA I/II specs, but |
1347 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
1348 | mdelay(1); | |
1da177e4 | 1349 | } |
cdcca89e | 1350 | scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ |
1da177e4 LT |
1351 | |
1352 | /* wait for phy to become ready, if necessary */ | |
1353 | do { | |
1354 | msleep(200); | |
1355 | sstatus = scr_read(ap, SCR_STATUS); | |
1356 | if ((sstatus & 0xf) != 1) | |
1357 | break; | |
1358 | } while (time_before(jiffies, timeout)); | |
1359 | ||
3be680b7 TH |
1360 | /* print link status */ |
1361 | sata_print_link_status(ap); | |
656563e3 | 1362 | |
3be680b7 TH |
1363 | /* TODO: phy layer with polling, timeouts, etc. */ |
1364 | if (sata_dev_present(ap)) | |
1da177e4 | 1365 | ata_port_probe(ap); |
3be680b7 | 1366 | else |
1da177e4 | 1367 | ata_port_disable(ap); |
1da177e4 LT |
1368 | |
1369 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1370 | return; | |
1371 | ||
1372 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
1373 | ata_port_disable(ap); | |
1374 | return; | |
1375 | } | |
1376 | ||
1377 | ap->cbl = ATA_CBL_SATA; | |
1378 | } | |
1379 | ||
1380 | /** | |
780a87f7 JG |
1381 | * sata_phy_reset - Reset SATA bus. |
1382 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1383 | * |
780a87f7 JG |
1384 | * This function resets the SATA bus, and then probes |
1385 | * the bus for devices. | |
1da177e4 LT |
1386 | * |
1387 | * LOCKING: | |
0cba632b | 1388 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1389 | * |
1390 | */ | |
1391 | void sata_phy_reset(struct ata_port *ap) | |
1392 | { | |
1393 | __sata_phy_reset(ap); | |
1394 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1395 | return; | |
1396 | ata_bus_reset(ap); | |
1397 | } | |
1398 | ||
1399 | /** | |
780a87f7 JG |
1400 | * ata_port_disable - Disable port. |
1401 | * @ap: Port to be disabled. | |
1da177e4 | 1402 | * |
780a87f7 JG |
1403 | * Modify @ap data structure such that the system |
1404 | * thinks that the entire port is disabled, and should | |
1405 | * never attempt to probe or communicate with devices | |
1406 | * on this port. | |
1407 | * | |
1408 | * LOCKING: host_set lock, or some other form of | |
1409 | * serialization. | |
1da177e4 LT |
1410 | */ |
1411 | ||
1412 | void ata_port_disable(struct ata_port *ap) | |
1413 | { | |
1414 | ap->device[0].class = ATA_DEV_NONE; | |
1415 | ap->device[1].class = ATA_DEV_NONE; | |
1416 | ap->flags |= ATA_FLAG_PORT_DISABLED; | |
1417 | } | |
1418 | ||
452503f9 AC |
1419 | /* |
1420 | * This mode timing computation functionality is ported over from | |
1421 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
1422 | */ | |
1423 | /* | |
1424 | * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). | |
1425 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except | |
1426 | * for PIO 5, which is a nonstandard extension and UDMA6, which | |
1427 | * is currently supported only by Maxtor drives. | |
1428 | */ | |
1429 | ||
1430 | static const struct ata_timing ata_timing[] = { | |
1431 | ||
1432 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
1433 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
1434 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
1435 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
1436 | ||
1437 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
1438 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
1439 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
1440 | ||
1441 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
1442 | ||
1443 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, | |
1444 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
1445 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
1446 | ||
1447 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, | |
1448 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
1449 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
1450 | ||
1451 | /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ | |
1452 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
1453 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
1454 | ||
1455 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
1456 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
1457 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
1458 | ||
1459 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
1460 | ||
1461 | { 0xFF } | |
1462 | }; | |
1463 | ||
1464 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
1465 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
1466 | ||
1467 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
1468 | { | |
1469 | q->setup = EZ(t->setup * 1000, T); | |
1470 | q->act8b = EZ(t->act8b * 1000, T); | |
1471 | q->rec8b = EZ(t->rec8b * 1000, T); | |
1472 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
1473 | q->active = EZ(t->active * 1000, T); | |
1474 | q->recover = EZ(t->recover * 1000, T); | |
1475 | q->cycle = EZ(t->cycle * 1000, T); | |
1476 | q->udma = EZ(t->udma * 1000, UT); | |
1477 | } | |
1478 | ||
1479 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
1480 | struct ata_timing *m, unsigned int what) | |
1481 | { | |
1482 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
1483 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
1484 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
1485 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
1486 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
1487 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
1488 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
1489 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
1490 | } | |
1491 | ||
1492 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
1493 | { | |
1494 | const struct ata_timing *t; | |
1495 | ||
1496 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 1497 | if (t->mode == 0xFF) |
452503f9 AC |
1498 | return NULL; |
1499 | return t; | |
1500 | } | |
1501 | ||
1502 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
1503 | struct ata_timing *t, int T, int UT) | |
1504 | { | |
1505 | const struct ata_timing *s; | |
1506 | struct ata_timing p; | |
1507 | ||
1508 | /* | |
1509 | * Find the mode. | |
75b1f2f8 | 1510 | */ |
452503f9 AC |
1511 | |
1512 | if (!(s = ata_timing_find_mode(speed))) | |
1513 | return -EINVAL; | |
1514 | ||
75b1f2f8 AL |
1515 | memcpy(t, s, sizeof(*s)); |
1516 | ||
452503f9 AC |
1517 | /* |
1518 | * If the drive is an EIDE drive, it can tell us it needs extended | |
1519 | * PIO/MW_DMA cycle timing. | |
1520 | */ | |
1521 | ||
1522 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
1523 | memset(&p, 0, sizeof(p)); | |
1524 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
1525 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
1526 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
1527 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
1528 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
1529 | } | |
1530 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * Convert the timing to bus clock counts. | |
1535 | */ | |
1536 | ||
75b1f2f8 | 1537 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
1538 | |
1539 | /* | |
c893a3ae RD |
1540 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
1541 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
1542 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
1543 | */ |
1544 | ||
1545 | if (speed > XFER_PIO_4) { | |
1546 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); | |
1547 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
1548 | } | |
1549 | ||
1550 | /* | |
c893a3ae | 1551 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
1552 | */ |
1553 | ||
1554 | if (t->act8b + t->rec8b < t->cyc8b) { | |
1555 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
1556 | t->rec8b = t->cyc8b - t->act8b; | |
1557 | } | |
1558 | ||
1559 | if (t->active + t->recover < t->cycle) { | |
1560 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
1561 | t->recover = t->cycle - t->active; | |
1562 | } | |
1563 | ||
1564 | return 0; | |
1565 | } | |
1566 | ||
057ace5e | 1567 | static const struct { |
1da177e4 LT |
1568 | unsigned int shift; |
1569 | u8 base; | |
1570 | } xfer_mode_classes[] = { | |
1571 | { ATA_SHIFT_UDMA, XFER_UDMA_0 }, | |
1572 | { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 }, | |
1573 | { ATA_SHIFT_PIO, XFER_PIO_0 }, | |
1574 | }; | |
1575 | ||
858119e1 | 1576 | static u8 base_from_shift(unsigned int shift) |
1da177e4 LT |
1577 | { |
1578 | int i; | |
1579 | ||
1580 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) | |
1581 | if (xfer_mode_classes[i].shift == shift) | |
1582 | return xfer_mode_classes[i].base; | |
1583 | ||
1584 | return 0xff; | |
1585 | } | |
1586 | ||
1587 | static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) | |
1588 | { | |
1589 | int ofs, idx; | |
1590 | u8 base; | |
1591 | ||
1592 | if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED)) | |
1593 | return; | |
1594 | ||
1595 | if (dev->xfer_shift == ATA_SHIFT_PIO) | |
1596 | dev->flags |= ATA_DFLAG_PIO; | |
1597 | ||
1598 | ata_dev_set_xfermode(ap, dev); | |
1599 | ||
1600 | base = base_from_shift(dev->xfer_shift); | |
1601 | ofs = dev->xfer_mode - base; | |
1602 | idx = ofs + dev->xfer_shift; | |
1603 | WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str)); | |
1604 | ||
1605 | DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n", | |
1606 | idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs); | |
1607 | ||
1608 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", | |
1609 | ap->id, dev->devno, xfer_mode_str[idx]); | |
1610 | } | |
1611 | ||
1612 | static int ata_host_set_pio(struct ata_port *ap) | |
1613 | { | |
1614 | unsigned int mask; | |
1615 | int x, i; | |
1616 | u8 base, xfer_mode; | |
1617 | ||
1618 | mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO); | |
1619 | x = fgb(mask); | |
1620 | if (x < 0) { | |
1621 | printk(KERN_WARNING "ata%u: no PIO support\n", ap->id); | |
1622 | return -1; | |
1623 | } | |
1624 | ||
1625 | base = base_from_shift(ATA_SHIFT_PIO); | |
1626 | xfer_mode = base + x; | |
1627 | ||
1628 | DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n", | |
1629 | (int)base, (int)xfer_mode, mask, x); | |
1630 | ||
1631 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
1632 | struct ata_device *dev = &ap->device[i]; | |
1633 | if (ata_dev_present(dev)) { | |
1634 | dev->pio_mode = xfer_mode; | |
1635 | dev->xfer_mode = xfer_mode; | |
1636 | dev->xfer_shift = ATA_SHIFT_PIO; | |
1637 | if (ap->ops->set_piomode) | |
1638 | ap->ops->set_piomode(ap, dev); | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | return 0; | |
1643 | } | |
1644 | ||
1645 | static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode, | |
1646 | unsigned int xfer_shift) | |
1647 | { | |
1648 | int i; | |
1649 | ||
1650 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
1651 | struct ata_device *dev = &ap->device[i]; | |
1652 | if (ata_dev_present(dev)) { | |
1653 | dev->dma_mode = xfer_mode; | |
1654 | dev->xfer_mode = xfer_mode; | |
1655 | dev->xfer_shift = xfer_shift; | |
1656 | if (ap->ops->set_dmamode) | |
1657 | ap->ops->set_dmamode(ap, dev); | |
1658 | } | |
1659 | } | |
1660 | } | |
1661 | ||
1662 | /** | |
1663 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
1664 | * @ap: port on which timings will be programmed | |
1665 | * | |
780a87f7 JG |
1666 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). |
1667 | * | |
1da177e4 | 1668 | * LOCKING: |
0cba632b | 1669 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1670 | */ |
1671 | static void ata_set_mode(struct ata_port *ap) | |
1672 | { | |
8cbd6df1 | 1673 | unsigned int xfer_shift; |
1da177e4 LT |
1674 | u8 xfer_mode; |
1675 | int rc; | |
1676 | ||
1677 | /* step 1: always set host PIO timings */ | |
1678 | rc = ata_host_set_pio(ap); | |
1679 | if (rc) | |
1680 | goto err_out; | |
1681 | ||
1682 | /* step 2: choose the best data xfer mode */ | |
1683 | xfer_mode = xfer_shift = 0; | |
1684 | rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift); | |
1685 | if (rc) | |
1686 | goto err_out; | |
1687 | ||
1688 | /* step 3: if that xfer mode isn't PIO, set host DMA timings */ | |
1689 | if (xfer_shift != ATA_SHIFT_PIO) | |
1690 | ata_host_set_dma(ap, xfer_mode, xfer_shift); | |
1691 | ||
1692 | /* step 4: update devices' xfer mode */ | |
1693 | ata_dev_set_mode(ap, &ap->device[0]); | |
1694 | ata_dev_set_mode(ap, &ap->device[1]); | |
1695 | ||
1696 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1697 | return; | |
1698 | ||
1699 | if (ap->ops->post_set_mode) | |
1700 | ap->ops->post_set_mode(ap); | |
1701 | ||
1da177e4 LT |
1702 | return; |
1703 | ||
1704 | err_out: | |
1705 | ata_port_disable(ap); | |
1706 | } | |
1707 | ||
1fdffbce JG |
1708 | /** |
1709 | * ata_tf_to_host - issue ATA taskfile to host controller | |
1710 | * @ap: port to which command is being issued | |
1711 | * @tf: ATA taskfile register set | |
1712 | * | |
1713 | * Issues ATA taskfile register set to ATA host controller, | |
1714 | * with proper synchronization with interrupt handler and | |
1715 | * other threads. | |
1716 | * | |
1717 | * LOCKING: | |
1718 | * spin_lock_irqsave(host_set lock) | |
1719 | */ | |
1720 | ||
1721 | static inline void ata_tf_to_host(struct ata_port *ap, | |
1722 | const struct ata_taskfile *tf) | |
1723 | { | |
1724 | ap->ops->tf_load(ap, tf); | |
1725 | ap->ops->exec_command(ap, tf); | |
1726 | } | |
1727 | ||
1da177e4 LT |
1728 | /** |
1729 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
1730 | * @ap: port containing status register to be polled | |
1731 | * @tmout_pat: impatience timeout | |
1732 | * @tmout: overall timeout | |
1733 | * | |
780a87f7 JG |
1734 | * Sleep until ATA Status register bit BSY clears, |
1735 | * or a timeout occurs. | |
1736 | * | |
1737 | * LOCKING: None. | |
1da177e4 LT |
1738 | */ |
1739 | ||
6f8b9958 TH |
1740 | unsigned int ata_busy_sleep (struct ata_port *ap, |
1741 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
1742 | { |
1743 | unsigned long timer_start, timeout; | |
1744 | u8 status; | |
1745 | ||
1746 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
1747 | timer_start = jiffies; | |
1748 | timeout = timer_start + tmout_pat; | |
1749 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
1750 | msleep(50); | |
1751 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
1752 | } | |
1753 | ||
1754 | if (status & ATA_BUSY) | |
1755 | printk(KERN_WARNING "ata%u is slow to respond, " | |
1756 | "please be patient\n", ap->id); | |
1757 | ||
1758 | timeout = timer_start + tmout; | |
1759 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
1760 | msleep(50); | |
1761 | status = ata_chk_status(ap); | |
1762 | } | |
1763 | ||
1764 | if (status & ATA_BUSY) { | |
1765 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", | |
1766 | ap->id, tmout / HZ); | |
1767 | return 1; | |
1768 | } | |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
1774 | { | |
1775 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
1776 | unsigned int dev0 = devmask & (1 << 0); | |
1777 | unsigned int dev1 = devmask & (1 << 1); | |
1778 | unsigned long timeout; | |
1779 | ||
1780 | /* if device 0 was found in ata_devchk, wait for its | |
1781 | * BSY bit to clear | |
1782 | */ | |
1783 | if (dev0) | |
1784 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
1785 | ||
1786 | /* if device 1 was found in ata_devchk, wait for | |
1787 | * register access, then wait for BSY to clear | |
1788 | */ | |
1789 | timeout = jiffies + ATA_TMOUT_BOOT; | |
1790 | while (dev1) { | |
1791 | u8 nsect, lbal; | |
1792 | ||
1793 | ap->ops->dev_select(ap, 1); | |
1794 | if (ap->flags & ATA_FLAG_MMIO) { | |
1795 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
1796 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
1797 | } else { | |
1798 | nsect = inb(ioaddr->nsect_addr); | |
1799 | lbal = inb(ioaddr->lbal_addr); | |
1800 | } | |
1801 | if ((nsect == 1) && (lbal == 1)) | |
1802 | break; | |
1803 | if (time_after(jiffies, timeout)) { | |
1804 | dev1 = 0; | |
1805 | break; | |
1806 | } | |
1807 | msleep(50); /* give drive a breather */ | |
1808 | } | |
1809 | if (dev1) | |
1810 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
1811 | ||
1812 | /* is all this really necessary? */ | |
1813 | ap->ops->dev_select(ap, 0); | |
1814 | if (dev1) | |
1815 | ap->ops->dev_select(ap, 1); | |
1816 | if (dev0) | |
1817 | ap->ops->dev_select(ap, 0); | |
1818 | } | |
1819 | ||
1820 | /** | |
0cba632b JG |
1821 | * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command. |
1822 | * @ap: Port to reset and probe | |
1823 | * | |
1824 | * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and | |
1825 | * probe the bus. Not often used these days. | |
1da177e4 LT |
1826 | * |
1827 | * LOCKING: | |
0cba632b | 1828 | * PCI/etc. bus probe sem. |
e5338254 | 1829 | * Obtains host_set lock. |
1da177e4 LT |
1830 | * |
1831 | */ | |
1832 | ||
1833 | static unsigned int ata_bus_edd(struct ata_port *ap) | |
1834 | { | |
1835 | struct ata_taskfile tf; | |
e5338254 | 1836 | unsigned long flags; |
1da177e4 LT |
1837 | |
1838 | /* set up execute-device-diag (bus reset) taskfile */ | |
1839 | /* also, take interrupts to a known state (disabled) */ | |
1840 | DPRINTK("execute-device-diag\n"); | |
1841 | ata_tf_init(ap, &tf, 0); | |
1842 | tf.ctl |= ATA_NIEN; | |
1843 | tf.command = ATA_CMD_EDD; | |
1844 | tf.protocol = ATA_PROT_NODATA; | |
1845 | ||
1846 | /* do bus reset */ | |
e5338254 | 1847 | spin_lock_irqsave(&ap->host_set->lock, flags); |
1da177e4 | 1848 | ata_tf_to_host(ap, &tf); |
e5338254 | 1849 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
1da177e4 LT |
1850 | |
1851 | /* spec says at least 2ms. but who knows with those | |
1852 | * crazy ATAPI devices... | |
1853 | */ | |
1854 | msleep(150); | |
1855 | ||
1856 | return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
1857 | } | |
1858 | ||
1859 | static unsigned int ata_bus_softreset(struct ata_port *ap, | |
1860 | unsigned int devmask) | |
1861 | { | |
1862 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
1863 | ||
1864 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); | |
1865 | ||
1866 | /* software reset. causes dev0 to be selected */ | |
1867 | if (ap->flags & ATA_FLAG_MMIO) { | |
1868 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
1869 | udelay(20); /* FIXME: flush */ | |
1870 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); | |
1871 | udelay(20); /* FIXME: flush */ | |
1872 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
1873 | } else { | |
1874 | outb(ap->ctl, ioaddr->ctl_addr); | |
1875 | udelay(10); | |
1876 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
1877 | udelay(10); | |
1878 | outb(ap->ctl, ioaddr->ctl_addr); | |
1879 | } | |
1880 | ||
1881 | /* spec mandates ">= 2ms" before checking status. | |
1882 | * We wait 150ms, because that was the magic delay used for | |
1883 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
1884 | * between when the ATA command register is written, and then | |
1885 | * status is checked. Because waiting for "a while" before | |
1886 | * checking status is fine, post SRST, we perform this magic | |
1887 | * delay here as well. | |
1888 | */ | |
1889 | msleep(150); | |
1890 | ||
1891 | ata_bus_post_reset(ap, devmask); | |
1892 | ||
1893 | return 0; | |
1894 | } | |
1895 | ||
1896 | /** | |
1897 | * ata_bus_reset - reset host port and associated ATA channel | |
1898 | * @ap: port to reset | |
1899 | * | |
1900 | * This is typically the first time we actually start issuing | |
1901 | * commands to the ATA channel. We wait for BSY to clear, then | |
1902 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
1903 | * result. Determine what devices, if any, are on the channel | |
1904 | * by looking at the device 0/1 error register. Look at the signature | |
1905 | * stored in each device's taskfile registers, to determine if | |
1906 | * the device is ATA or ATAPI. | |
1907 | * | |
1908 | * LOCKING: | |
0cba632b JG |
1909 | * PCI/etc. bus probe sem. |
1910 | * Obtains host_set lock. | |
1da177e4 LT |
1911 | * |
1912 | * SIDE EFFECTS: | |
1913 | * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. | |
1914 | */ | |
1915 | ||
1916 | void ata_bus_reset(struct ata_port *ap) | |
1917 | { | |
1918 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
1919 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
1920 | u8 err; | |
1921 | unsigned int dev0, dev1 = 0, rc = 0, devmask = 0; | |
1922 | ||
1923 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); | |
1924 | ||
1925 | /* determine if device 0/1 are present */ | |
1926 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
1927 | dev0 = 1; | |
1928 | else { | |
1929 | dev0 = ata_devchk(ap, 0); | |
1930 | if (slave_possible) | |
1931 | dev1 = ata_devchk(ap, 1); | |
1932 | } | |
1933 | ||
1934 | if (dev0) | |
1935 | devmask |= (1 << 0); | |
1936 | if (dev1) | |
1937 | devmask |= (1 << 1); | |
1938 | ||
1939 | /* select device 0 again */ | |
1940 | ap->ops->dev_select(ap, 0); | |
1941 | ||
1942 | /* issue bus reset */ | |
1943 | if (ap->flags & ATA_FLAG_SRST) | |
1944 | rc = ata_bus_softreset(ap, devmask); | |
1945 | else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) { | |
1946 | /* set up device control */ | |
1947 | if (ap->flags & ATA_FLAG_MMIO) | |
1948 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
1949 | else | |
1950 | outb(ap->ctl, ioaddr->ctl_addr); | |
1951 | rc = ata_bus_edd(ap); | |
1952 | } | |
1953 | ||
1954 | if (rc) | |
1955 | goto err_out; | |
1956 | ||
1957 | /* | |
1958 | * determine by signature whether we have ATA or ATAPI devices | |
1959 | */ | |
b4dc7623 | 1960 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 1961 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 1962 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
1963 | |
1964 | /* re-enable interrupts */ | |
1965 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
1966 | ata_irq_on(ap); | |
1967 | ||
1968 | /* is double-select really necessary? */ | |
1969 | if (ap->device[1].class != ATA_DEV_NONE) | |
1970 | ap->ops->dev_select(ap, 1); | |
1971 | if (ap->device[0].class != ATA_DEV_NONE) | |
1972 | ap->ops->dev_select(ap, 0); | |
1973 | ||
1974 | /* if no devices were detected, disable this port */ | |
1975 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
1976 | (ap->device[1].class == ATA_DEV_NONE)) | |
1977 | goto err_out; | |
1978 | ||
1979 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
1980 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
1981 | if (ap->flags & ATA_FLAG_MMIO) | |
1982 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
1983 | else | |
1984 | outb(ap->ctl, ioaddr->ctl_addr); | |
1985 | } | |
1986 | ||
1987 | DPRINTK("EXIT\n"); | |
1988 | return; | |
1989 | ||
1990 | err_out: | |
1991 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); | |
1992 | ap->ops->port_disable(ap); | |
1993 | ||
1994 | DPRINTK("EXIT\n"); | |
1995 | } | |
1996 | ||
7a7921e8 TH |
1997 | static int sata_phy_resume(struct ata_port *ap) |
1998 | { | |
1999 | unsigned long timeout = jiffies + (HZ * 5); | |
2000 | u32 sstatus; | |
2001 | ||
2002 | scr_write_flush(ap, SCR_CONTROL, 0x300); | |
2003 | ||
2004 | /* Wait for phy to become ready, if necessary. */ | |
2005 | do { | |
2006 | msleep(200); | |
2007 | sstatus = scr_read(ap, SCR_STATUS); | |
2008 | if ((sstatus & 0xf) != 1) | |
2009 | return 0; | |
2010 | } while (time_before(jiffies, timeout)); | |
2011 | ||
2012 | return -1; | |
2013 | } | |
2014 | ||
8a19ac89 TH |
2015 | /** |
2016 | * ata_std_probeinit - initialize probing | |
2017 | * @ap: port to be probed | |
2018 | * | |
2019 | * @ap is about to be probed. Initialize it. This function is | |
2020 | * to be used as standard callback for ata_drive_probe_reset(). | |
3a39746a TH |
2021 | * |
2022 | * NOTE!!! Do not use this function as probeinit if a low level | |
2023 | * driver implements only hardreset. Just pass NULL as probeinit | |
2024 | * in that case. Using this function is probably okay but doing | |
2025 | * so makes reset sequence different from the original | |
2026 | * ->phy_reset implementation and Jeff nervous. :-P | |
8a19ac89 TH |
2027 | */ |
2028 | extern void ata_std_probeinit(struct ata_port *ap) | |
2029 | { | |
3a39746a | 2030 | if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) { |
8a19ac89 | 2031 | sata_phy_resume(ap); |
3a39746a TH |
2032 | if (sata_dev_present(ap)) |
2033 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2034 | } | |
8a19ac89 TH |
2035 | } |
2036 | ||
c2bd5804 TH |
2037 | /** |
2038 | * ata_std_softreset - reset host port via ATA SRST | |
2039 | * @ap: port to reset | |
2040 | * @verbose: fail verbosely | |
2041 | * @classes: resulting classes of attached devices | |
2042 | * | |
2043 | * Reset host port using ATA SRST. This function is to be used | |
2044 | * as standard callback for ata_drive_*_reset() functions. | |
2045 | * | |
2046 | * LOCKING: | |
2047 | * Kernel thread context (may sleep) | |
2048 | * | |
2049 | * RETURNS: | |
2050 | * 0 on success, -errno otherwise. | |
2051 | */ | |
2052 | int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) | |
2053 | { | |
2054 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2055 | unsigned int devmask = 0, err_mask; | |
2056 | u8 err; | |
2057 | ||
2058 | DPRINTK("ENTER\n"); | |
2059 | ||
3a39746a TH |
2060 | if (ap->ops->scr_read && !sata_dev_present(ap)) { |
2061 | classes[0] = ATA_DEV_NONE; | |
2062 | goto out; | |
2063 | } | |
2064 | ||
c2bd5804 TH |
2065 | /* determine if device 0/1 are present */ |
2066 | if (ata_devchk(ap, 0)) | |
2067 | devmask |= (1 << 0); | |
2068 | if (slave_possible && ata_devchk(ap, 1)) | |
2069 | devmask |= (1 << 1); | |
2070 | ||
c2bd5804 TH |
2071 | /* select device 0 again */ |
2072 | ap->ops->dev_select(ap, 0); | |
2073 | ||
2074 | /* issue bus reset */ | |
2075 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
2076 | err_mask = ata_bus_softreset(ap, devmask); | |
2077 | if (err_mask) { | |
2078 | if (verbose) | |
2079 | printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n", | |
2080 | ap->id, err_mask); | |
2081 | else | |
2082 | DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n", | |
2083 | err_mask); | |
2084 | return -EIO; | |
2085 | } | |
2086 | ||
2087 | /* determine by signature whether we have ATA or ATAPI devices */ | |
2088 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
2089 | if (slave_possible && err != 0x81) | |
2090 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
2091 | ||
3a39746a | 2092 | out: |
c2bd5804 TH |
2093 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
2094 | return 0; | |
2095 | } | |
2096 | ||
2097 | /** | |
2098 | * sata_std_hardreset - reset host port via SATA phy reset | |
2099 | * @ap: port to reset | |
2100 | * @verbose: fail verbosely | |
2101 | * @class: resulting class of attached device | |
2102 | * | |
2103 | * SATA phy-reset host port using DET bits of SControl register. | |
2104 | * This function is to be used as standard callback for | |
2105 | * ata_drive_*_reset(). | |
2106 | * | |
2107 | * LOCKING: | |
2108 | * Kernel thread context (may sleep) | |
2109 | * | |
2110 | * RETURNS: | |
2111 | * 0 on success, -errno otherwise. | |
2112 | */ | |
2113 | int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) | |
2114 | { | |
c2bd5804 TH |
2115 | DPRINTK("ENTER\n"); |
2116 | ||
2117 | /* Issue phy wake/reset */ | |
2118 | scr_write_flush(ap, SCR_CONTROL, 0x301); | |
2119 | ||
2120 | /* | |
2121 | * Couldn't find anything in SATA I/II specs, but AHCI-1.1 | |
2122 | * 10.4.2 says at least 1 ms. | |
2123 | */ | |
2124 | msleep(1); | |
2125 | ||
7a7921e8 TH |
2126 | /* Bring phy back */ |
2127 | sata_phy_resume(ap); | |
c2bd5804 | 2128 | |
c2bd5804 TH |
2129 | /* TODO: phy layer with polling, timeouts, etc. */ |
2130 | if (!sata_dev_present(ap)) { | |
2131 | *class = ATA_DEV_NONE; | |
2132 | DPRINTK("EXIT, link offline\n"); | |
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2137 | if (verbose) | |
2138 | printk(KERN_ERR "ata%u: COMRESET failed " | |
2139 | "(device not ready)\n", ap->id); | |
2140 | else | |
2141 | DPRINTK("EXIT, device not ready\n"); | |
2142 | return -EIO; | |
2143 | } | |
2144 | ||
3a39746a TH |
2145 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
2146 | ||
c2bd5804 TH |
2147 | *class = ata_dev_try_classify(ap, 0, NULL); |
2148 | ||
2149 | DPRINTK("EXIT, class=%u\n", *class); | |
2150 | return 0; | |
2151 | } | |
2152 | ||
2153 | /** | |
2154 | * ata_std_postreset - standard postreset callback | |
2155 | * @ap: the target ata_port | |
2156 | * @classes: classes of attached devices | |
2157 | * | |
2158 | * This function is invoked after a successful reset. Note that | |
2159 | * the device might have been reset more than once using | |
2160 | * different reset methods before postreset is invoked. | |
c2bd5804 TH |
2161 | * |
2162 | * This function is to be used as standard callback for | |
2163 | * ata_drive_*_reset(). | |
2164 | * | |
2165 | * LOCKING: | |
2166 | * Kernel thread context (may sleep) | |
2167 | */ | |
2168 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
2169 | { | |
2170 | DPRINTK("ENTER\n"); | |
2171 | ||
56497bd5 | 2172 | /* set cable type if it isn't already set */ |
c2bd5804 TH |
2173 | if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA) |
2174 | ap->cbl = ATA_CBL_SATA; | |
2175 | ||
2176 | /* print link status */ | |
2177 | if (ap->cbl == ATA_CBL_SATA) | |
2178 | sata_print_link_status(ap); | |
2179 | ||
3a39746a TH |
2180 | /* re-enable interrupts */ |
2181 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2182 | ata_irq_on(ap); | |
c2bd5804 TH |
2183 | |
2184 | /* is double-select really necessary? */ | |
2185 | if (classes[0] != ATA_DEV_NONE) | |
2186 | ap->ops->dev_select(ap, 1); | |
2187 | if (classes[1] != ATA_DEV_NONE) | |
2188 | ap->ops->dev_select(ap, 0); | |
2189 | ||
3a39746a TH |
2190 | /* bail out if no device is present */ |
2191 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
2192 | DPRINTK("EXIT, no device\n"); | |
2193 | return; | |
2194 | } | |
2195 | ||
2196 | /* set up device control */ | |
2197 | if (ap->ioaddr.ctl_addr) { | |
2198 | if (ap->flags & ATA_FLAG_MMIO) | |
2199 | writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr); | |
2200 | else | |
2201 | outb(ap->ctl, ap->ioaddr.ctl_addr); | |
2202 | } | |
c2bd5804 TH |
2203 | |
2204 | DPRINTK("EXIT\n"); | |
2205 | } | |
2206 | ||
2207 | /** | |
2208 | * ata_std_probe_reset - standard probe reset method | |
2209 | * @ap: prot to perform probe-reset | |
2210 | * @classes: resulting classes of attached devices | |
2211 | * | |
2212 | * The stock off-the-shelf ->probe_reset method. | |
2213 | * | |
2214 | * LOCKING: | |
2215 | * Kernel thread context (may sleep) | |
2216 | * | |
2217 | * RETURNS: | |
2218 | * 0 on success, -errno otherwise. | |
2219 | */ | |
2220 | int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) | |
2221 | { | |
2222 | ata_reset_fn_t hardreset; | |
2223 | ||
2224 | hardreset = NULL; | |
b911fc3a | 2225 | if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) |
c2bd5804 TH |
2226 | hardreset = sata_std_hardreset; |
2227 | ||
8a19ac89 | 2228 | return ata_drive_probe_reset(ap, ata_std_probeinit, |
7944ea95 | 2229 | ata_std_softreset, hardreset, |
c2bd5804 TH |
2230 | ata_std_postreset, classes); |
2231 | } | |
2232 | ||
a62c0fc5 TH |
2233 | static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset, |
2234 | ata_postreset_fn_t postreset, | |
2235 | unsigned int *classes) | |
2236 | { | |
2237 | int i, rc; | |
2238 | ||
2239 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2240 | classes[i] = ATA_DEV_UNKNOWN; | |
2241 | ||
2242 | rc = reset(ap, 0, classes); | |
2243 | if (rc) | |
2244 | return rc; | |
2245 | ||
2246 | /* If any class isn't ATA_DEV_UNKNOWN, consider classification | |
2247 | * is complete and convert all ATA_DEV_UNKNOWN to | |
2248 | * ATA_DEV_NONE. | |
2249 | */ | |
2250 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2251 | if (classes[i] != ATA_DEV_UNKNOWN) | |
2252 | break; | |
2253 | ||
2254 | if (i < ATA_MAX_DEVICES) | |
2255 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2256 | if (classes[i] == ATA_DEV_UNKNOWN) | |
2257 | classes[i] = ATA_DEV_NONE; | |
2258 | ||
2259 | if (postreset) | |
2260 | postreset(ap, classes); | |
2261 | ||
2262 | return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV; | |
2263 | } | |
2264 | ||
2265 | /** | |
2266 | * ata_drive_probe_reset - Perform probe reset with given methods | |
2267 | * @ap: port to reset | |
7944ea95 | 2268 | * @probeinit: probeinit method (can be NULL) |
a62c0fc5 TH |
2269 | * @softreset: softreset method (can be NULL) |
2270 | * @hardreset: hardreset method (can be NULL) | |
2271 | * @postreset: postreset method (can be NULL) | |
2272 | * @classes: resulting classes of attached devices | |
2273 | * | |
2274 | * Reset the specified port and classify attached devices using | |
2275 | * given methods. This function prefers softreset but tries all | |
2276 | * possible reset sequences to reset and classify devices. This | |
2277 | * function is intended to be used for constructing ->probe_reset | |
2278 | * callback by low level drivers. | |
2279 | * | |
2280 | * Reset methods should follow the following rules. | |
2281 | * | |
2282 | * - Return 0 on sucess, -errno on failure. | |
2283 | * - If classification is supported, fill classes[] with | |
2284 | * recognized class codes. | |
2285 | * - If classification is not supported, leave classes[] alone. | |
2286 | * - If verbose is non-zero, print error message on failure; | |
2287 | * otherwise, shut up. | |
2288 | * | |
2289 | * LOCKING: | |
2290 | * Kernel thread context (may sleep) | |
2291 | * | |
2292 | * RETURNS: | |
2293 | * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV | |
2294 | * if classification fails, and any error code from reset | |
2295 | * methods. | |
2296 | */ | |
7944ea95 | 2297 | int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
2298 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
2299 | ata_postreset_fn_t postreset, unsigned int *classes) | |
2300 | { | |
2301 | int rc = -EINVAL; | |
2302 | ||
7944ea95 TH |
2303 | if (probeinit) |
2304 | probeinit(ap); | |
2305 | ||
a62c0fc5 TH |
2306 | if (softreset) { |
2307 | rc = do_probe_reset(ap, softreset, postreset, classes); | |
2308 | if (rc == 0) | |
2309 | return 0; | |
2310 | } | |
2311 | ||
2312 | if (!hardreset) | |
2313 | return rc; | |
2314 | ||
2315 | rc = do_probe_reset(ap, hardreset, postreset, classes); | |
2316 | if (rc == 0 || rc != -ENODEV) | |
2317 | return rc; | |
2318 | ||
2319 | if (softreset) | |
2320 | rc = do_probe_reset(ap, softreset, postreset, classes); | |
2321 | ||
2322 | return rc; | |
2323 | } | |
2324 | ||
057ace5e JG |
2325 | static void ata_pr_blacklisted(const struct ata_port *ap, |
2326 | const struct ata_device *dev) | |
1da177e4 LT |
2327 | { |
2328 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n", | |
2329 | ap->id, dev->devno); | |
2330 | } | |
2331 | ||
98ac62de | 2332 | static const char * const ata_dma_blacklist [] = { |
1da177e4 LT |
2333 | "WDC AC11000H", |
2334 | "WDC AC22100H", | |
2335 | "WDC AC32500H", | |
2336 | "WDC AC33100H", | |
2337 | "WDC AC31600H", | |
2338 | "WDC AC32100H", | |
2339 | "WDC AC23200L", | |
2340 | "Compaq CRD-8241B", | |
2341 | "CRD-8400B", | |
2342 | "CRD-8480B", | |
2343 | "CRD-8482B", | |
2344 | "CRD-84", | |
2345 | "SanDisk SDP3B", | |
2346 | "SanDisk SDP3B-64", | |
2347 | "SANYO CD-ROM CRD", | |
2348 | "HITACHI CDR-8", | |
2349 | "HITACHI CDR-8335", | |
2350 | "HITACHI CDR-8435", | |
2351 | "Toshiba CD-ROM XM-6202B", | |
e922256a | 2352 | "TOSHIBA CD-ROM XM-1702BC", |
1da177e4 LT |
2353 | "CD-532E-A", |
2354 | "E-IDE CD-ROM CR-840", | |
2355 | "CD-ROM Drive/F5A", | |
2356 | "WPI CDD-820", | |
2357 | "SAMSUNG CD-ROM SC-148C", | |
2358 | "SAMSUNG CD-ROM SC", | |
2359 | "SanDisk SDP3B-64", | |
1da177e4 LT |
2360 | "ATAPI CD-ROM DRIVE 40X MAXIMUM", |
2361 | "_NEC DV5800A", | |
2362 | }; | |
2363 | ||
057ace5e | 2364 | static int ata_dma_blacklisted(const struct ata_device *dev) |
1da177e4 | 2365 | { |
2e02671d | 2366 | unsigned char model_num[41]; |
1da177e4 LT |
2367 | int i; |
2368 | ||
6a62a04d | 2369 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num)); |
1da177e4 LT |
2370 | |
2371 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++) | |
2e02671d | 2372 | if (!strcmp(ata_dma_blacklist[i], model_num)) |
1da177e4 LT |
2373 | return 1; |
2374 | ||
2375 | return 0; | |
2376 | } | |
2377 | ||
057ace5e | 2378 | static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift) |
1da177e4 | 2379 | { |
057ace5e | 2380 | const struct ata_device *master, *slave; |
1da177e4 LT |
2381 | unsigned int mask; |
2382 | ||
2383 | master = &ap->device[0]; | |
2384 | slave = &ap->device[1]; | |
2385 | ||
a4631474 | 2386 | WARN_ON(!ata_dev_present(master) && !ata_dev_present(slave)); |
1da177e4 LT |
2387 | |
2388 | if (shift == ATA_SHIFT_UDMA) { | |
2389 | mask = ap->udma_mask; | |
2390 | if (ata_dev_present(master)) { | |
2391 | mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff); | |
057ace5e | 2392 | if (ata_dma_blacklisted(master)) { |
1da177e4 LT |
2393 | mask = 0; |
2394 | ata_pr_blacklisted(ap, master); | |
2395 | } | |
2396 | } | |
2397 | if (ata_dev_present(slave)) { | |
2398 | mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff); | |
057ace5e | 2399 | if (ata_dma_blacklisted(slave)) { |
1da177e4 LT |
2400 | mask = 0; |
2401 | ata_pr_blacklisted(ap, slave); | |
2402 | } | |
2403 | } | |
2404 | } | |
2405 | else if (shift == ATA_SHIFT_MWDMA) { | |
2406 | mask = ap->mwdma_mask; | |
2407 | if (ata_dev_present(master)) { | |
2408 | mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07); | |
057ace5e | 2409 | if (ata_dma_blacklisted(master)) { |
1da177e4 LT |
2410 | mask = 0; |
2411 | ata_pr_blacklisted(ap, master); | |
2412 | } | |
2413 | } | |
2414 | if (ata_dev_present(slave)) { | |
2415 | mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07); | |
057ace5e | 2416 | if (ata_dma_blacklisted(slave)) { |
1da177e4 LT |
2417 | mask = 0; |
2418 | ata_pr_blacklisted(ap, slave); | |
2419 | } | |
2420 | } | |
2421 | } | |
2422 | else if (shift == ATA_SHIFT_PIO) { | |
2423 | mask = ap->pio_mask; | |
2424 | if (ata_dev_present(master)) { | |
2425 | /* spec doesn't return explicit support for | |
2426 | * PIO0-2, so we fake it | |
2427 | */ | |
2428 | u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03; | |
2429 | tmp_mode <<= 3; | |
2430 | tmp_mode |= 0x7; | |
2431 | mask &= tmp_mode; | |
2432 | } | |
2433 | if (ata_dev_present(slave)) { | |
2434 | /* spec doesn't return explicit support for | |
2435 | * PIO0-2, so we fake it | |
2436 | */ | |
2437 | u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03; | |
2438 | tmp_mode <<= 3; | |
2439 | tmp_mode |= 0x7; | |
2440 | mask &= tmp_mode; | |
2441 | } | |
2442 | } | |
2443 | else { | |
2444 | mask = 0xffffffff; /* shut up compiler warning */ | |
2445 | BUG(); | |
2446 | } | |
2447 | ||
2448 | return mask; | |
2449 | } | |
2450 | ||
2451 | /* find greatest bit */ | |
2452 | static int fgb(u32 bitmap) | |
2453 | { | |
2454 | unsigned int i; | |
2455 | int x = -1; | |
2456 | ||
2457 | for (i = 0; i < 32; i++) | |
2458 | if (bitmap & (1 << i)) | |
2459 | x = i; | |
2460 | ||
2461 | return x; | |
2462 | } | |
2463 | ||
2464 | /** | |
2465 | * ata_choose_xfer_mode - attempt to find best transfer mode | |
2466 | * @ap: Port for which an xfer mode will be selected | |
2467 | * @xfer_mode_out: (output) SET FEATURES - XFER MODE code | |
2468 | * @xfer_shift_out: (output) bit shift that selects this mode | |
2469 | * | |
0cba632b JG |
2470 | * Based on host and device capabilities, determine the |
2471 | * maximum transfer mode that is amenable to all. | |
2472 | * | |
1da177e4 | 2473 | * LOCKING: |
0cba632b | 2474 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2475 | * |
2476 | * RETURNS: | |
2477 | * Zero on success, negative on error. | |
2478 | */ | |
2479 | ||
057ace5e | 2480 | static int ata_choose_xfer_mode(const struct ata_port *ap, |
1da177e4 LT |
2481 | u8 *xfer_mode_out, |
2482 | unsigned int *xfer_shift_out) | |
2483 | { | |
2484 | unsigned int mask, shift; | |
2485 | int x, i; | |
2486 | ||
2487 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) { | |
2488 | shift = xfer_mode_classes[i].shift; | |
2489 | mask = ata_get_mode_mask(ap, shift); | |
2490 | ||
2491 | x = fgb(mask); | |
2492 | if (x >= 0) { | |
2493 | *xfer_mode_out = xfer_mode_classes[i].base + x; | |
2494 | *xfer_shift_out = shift; | |
2495 | return 0; | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | return -1; | |
2500 | } | |
2501 | ||
2502 | /** | |
2503 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
2504 | * @ap: Port associated with device @dev | |
2505 | * @dev: Device to which command will be sent | |
2506 | * | |
780a87f7 JG |
2507 | * Issue SET FEATURES - XFER MODE command to device @dev |
2508 | * on port @ap. | |
2509 | * | |
1da177e4 | 2510 | * LOCKING: |
0cba632b | 2511 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2512 | */ |
2513 | ||
2514 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev) | |
2515 | { | |
a0123703 | 2516 | struct ata_taskfile tf; |
1da177e4 LT |
2517 | |
2518 | /* set up set-features taskfile */ | |
2519 | DPRINTK("set features - xfer mode\n"); | |
2520 | ||
a0123703 TH |
2521 | ata_tf_init(ap, &tf, dev->devno); |
2522 | tf.command = ATA_CMD_SET_FEATURES; | |
2523 | tf.feature = SETFEATURES_XFER; | |
2524 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2525 | tf.protocol = ATA_PROT_NODATA; | |
2526 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 2527 | |
a0123703 TH |
2528 | if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) { |
2529 | printk(KERN_ERR "ata%u: failed to set xfermode, disabled\n", | |
2530 | ap->id); | |
1da177e4 | 2531 | ata_port_disable(ap); |
a0123703 | 2532 | } |
1da177e4 LT |
2533 | |
2534 | DPRINTK("EXIT\n"); | |
2535 | } | |
2536 | ||
8bf62ece AL |
2537 | /** |
2538 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
2539 | * @ap: Port associated with device @dev | |
2540 | * @dev: Device to which command will be sent | |
2541 | * | |
2542 | * LOCKING: | |
6aff8f1f TH |
2543 | * Kernel thread context (may sleep) |
2544 | * | |
2545 | * RETURNS: | |
2546 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece AL |
2547 | */ |
2548 | ||
6aff8f1f TH |
2549 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
2550 | struct ata_device *dev) | |
8bf62ece | 2551 | { |
a0123703 | 2552 | struct ata_taskfile tf; |
6aff8f1f | 2553 | unsigned int err_mask; |
8bf62ece AL |
2554 | u16 sectors = dev->id[6]; |
2555 | u16 heads = dev->id[3]; | |
2556 | ||
2557 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
2558 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
6aff8f1f | 2559 | return 0; |
8bf62ece AL |
2560 | |
2561 | /* set up init dev params taskfile */ | |
2562 | DPRINTK("init dev params \n"); | |
2563 | ||
a0123703 TH |
2564 | ata_tf_init(ap, &tf, dev->devno); |
2565 | tf.command = ATA_CMD_INIT_DEV_PARAMS; | |
2566 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2567 | tf.protocol = ATA_PROT_NODATA; | |
2568 | tf.nsect = sectors; | |
2569 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 2570 | |
6aff8f1f | 2571 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); |
8bf62ece | 2572 | |
6aff8f1f TH |
2573 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
2574 | return err_mask; | |
8bf62ece AL |
2575 | } |
2576 | ||
1da177e4 | 2577 | /** |
0cba632b JG |
2578 | * ata_sg_clean - Unmap DMA memory associated with command |
2579 | * @qc: Command containing DMA memory to be released | |
2580 | * | |
2581 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
2582 | * |
2583 | * LOCKING: | |
0cba632b | 2584 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
2585 | */ |
2586 | ||
2587 | static void ata_sg_clean(struct ata_queued_cmd *qc) | |
2588 | { | |
2589 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 2590 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 2591 | int dir = qc->dma_dir; |
cedc9a47 | 2592 | void *pad_buf = NULL; |
1da177e4 | 2593 | |
a4631474 TH |
2594 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
2595 | WARN_ON(sg == NULL); | |
1da177e4 LT |
2596 | |
2597 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 2598 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 2599 | |
2c13b7ce | 2600 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 2601 | |
cedc9a47 JG |
2602 | /* if we padded the buffer out to 32-bit bound, and data |
2603 | * xfer direction is from-device, we must copy from the | |
2604 | * pad buffer back into the supplied buffer | |
2605 | */ | |
2606 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
2607 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
2608 | ||
2609 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d JG |
2610 | if (qc->n_elem) |
2611 | dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir); | |
cedc9a47 JG |
2612 | /* restore last sg */ |
2613 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
2614 | if (pad_buf) { | |
2615 | struct scatterlist *psg = &qc->pad_sgent; | |
2616 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
2617 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 2618 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
2619 | } |
2620 | } else { | |
2e242fa9 | 2621 | if (qc->n_elem) |
e1410f2d JG |
2622 | dma_unmap_single(ap->host_set->dev, |
2623 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), | |
2624 | dir); | |
cedc9a47 JG |
2625 | /* restore sg */ |
2626 | sg->length += qc->pad_len; | |
2627 | if (pad_buf) | |
2628 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
2629 | pad_buf, qc->pad_len); | |
2630 | } | |
1da177e4 LT |
2631 | |
2632 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 2633 | qc->__sg = NULL; |
1da177e4 LT |
2634 | } |
2635 | ||
2636 | /** | |
2637 | * ata_fill_sg - Fill PCI IDE PRD table | |
2638 | * @qc: Metadata associated with taskfile to be transferred | |
2639 | * | |
780a87f7 JG |
2640 | * Fill PCI IDE PRD (scatter-gather) table with segments |
2641 | * associated with the current disk command. | |
2642 | * | |
1da177e4 | 2643 | * LOCKING: |
780a87f7 | 2644 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
2645 | * |
2646 | */ | |
2647 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
2648 | { | |
1da177e4 | 2649 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
2650 | struct scatterlist *sg; |
2651 | unsigned int idx; | |
1da177e4 | 2652 | |
a4631474 | 2653 | WARN_ON(qc->__sg == NULL); |
f131883e | 2654 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
2655 | |
2656 | idx = 0; | |
cedc9a47 | 2657 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
2658 | u32 addr, offset; |
2659 | u32 sg_len, len; | |
2660 | ||
2661 | /* determine if physical DMA addr spans 64K boundary. | |
2662 | * Note h/w doesn't support 64-bit, so we unconditionally | |
2663 | * truncate dma_addr_t to u32. | |
2664 | */ | |
2665 | addr = (u32) sg_dma_address(sg); | |
2666 | sg_len = sg_dma_len(sg); | |
2667 | ||
2668 | while (sg_len) { | |
2669 | offset = addr & 0xffff; | |
2670 | len = sg_len; | |
2671 | if ((offset + sg_len) > 0x10000) | |
2672 | len = 0x10000 - offset; | |
2673 | ||
2674 | ap->prd[idx].addr = cpu_to_le32(addr); | |
2675 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
2676 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
2677 | ||
2678 | idx++; | |
2679 | sg_len -= len; | |
2680 | addr += len; | |
2681 | } | |
2682 | } | |
2683 | ||
2684 | if (idx) | |
2685 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
2686 | } | |
2687 | /** | |
2688 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
2689 | * @qc: Metadata associated with taskfile to check | |
2690 | * | |
780a87f7 JG |
2691 | * Allow low-level driver to filter ATA PACKET commands, returning |
2692 | * a status indicating whether or not it is OK to use DMA for the | |
2693 | * supplied PACKET command. | |
2694 | * | |
1da177e4 | 2695 | * LOCKING: |
0cba632b JG |
2696 | * spin_lock_irqsave(host_set lock) |
2697 | * | |
1da177e4 LT |
2698 | * RETURNS: 0 when ATAPI DMA can be used |
2699 | * nonzero otherwise | |
2700 | */ | |
2701 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
2702 | { | |
2703 | struct ata_port *ap = qc->ap; | |
2704 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
2705 | ||
2706 | if (ap->ops->check_atapi_dma) | |
2707 | rc = ap->ops->check_atapi_dma(qc); | |
2708 | ||
2709 | return rc; | |
2710 | } | |
2711 | /** | |
2712 | * ata_qc_prep - Prepare taskfile for submission | |
2713 | * @qc: Metadata associated with taskfile to be prepared | |
2714 | * | |
780a87f7 JG |
2715 | * Prepare ATA taskfile for submission. |
2716 | * | |
1da177e4 LT |
2717 | * LOCKING: |
2718 | * spin_lock_irqsave(host_set lock) | |
2719 | */ | |
2720 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
2721 | { | |
2722 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
2723 | return; | |
2724 | ||
2725 | ata_fill_sg(qc); | |
2726 | } | |
2727 | ||
0cba632b JG |
2728 | /** |
2729 | * ata_sg_init_one - Associate command with memory buffer | |
2730 | * @qc: Command to be associated | |
2731 | * @buf: Memory buffer | |
2732 | * @buflen: Length of memory buffer, in bytes. | |
2733 | * | |
2734 | * Initialize the data-related elements of queued_cmd @qc | |
2735 | * to point to a single memory buffer, @buf of byte length @buflen. | |
2736 | * | |
2737 | * LOCKING: | |
2738 | * spin_lock_irqsave(host_set lock) | |
2739 | */ | |
2740 | ||
1da177e4 LT |
2741 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
2742 | { | |
2743 | struct scatterlist *sg; | |
2744 | ||
2745 | qc->flags |= ATA_QCFLAG_SINGLE; | |
2746 | ||
2747 | memset(&qc->sgent, 0, sizeof(qc->sgent)); | |
cedc9a47 | 2748 | qc->__sg = &qc->sgent; |
1da177e4 | 2749 | qc->n_elem = 1; |
cedc9a47 | 2750 | qc->orig_n_elem = 1; |
1da177e4 LT |
2751 | qc->buf_virt = buf; |
2752 | ||
cedc9a47 | 2753 | sg = qc->__sg; |
f0612bbc | 2754 | sg_init_one(sg, buf, buflen); |
1da177e4 LT |
2755 | } |
2756 | ||
0cba632b JG |
2757 | /** |
2758 | * ata_sg_init - Associate command with scatter-gather table. | |
2759 | * @qc: Command to be associated | |
2760 | * @sg: Scatter-gather table. | |
2761 | * @n_elem: Number of elements in s/g table. | |
2762 | * | |
2763 | * Initialize the data-related elements of queued_cmd @qc | |
2764 | * to point to a scatter-gather table @sg, containing @n_elem | |
2765 | * elements. | |
2766 | * | |
2767 | * LOCKING: | |
2768 | * spin_lock_irqsave(host_set lock) | |
2769 | */ | |
2770 | ||
1da177e4 LT |
2771 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
2772 | unsigned int n_elem) | |
2773 | { | |
2774 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 2775 | qc->__sg = sg; |
1da177e4 | 2776 | qc->n_elem = n_elem; |
cedc9a47 | 2777 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
2778 | } |
2779 | ||
2780 | /** | |
0cba632b JG |
2781 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
2782 | * @qc: Command with memory buffer to be mapped. | |
2783 | * | |
2784 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
2785 | * |
2786 | * LOCKING: | |
2787 | * spin_lock_irqsave(host_set lock) | |
2788 | * | |
2789 | * RETURNS: | |
0cba632b | 2790 | * Zero on success, negative on error. |
1da177e4 LT |
2791 | */ |
2792 | ||
2793 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
2794 | { | |
2795 | struct ata_port *ap = qc->ap; | |
2796 | int dir = qc->dma_dir; | |
cedc9a47 | 2797 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 2798 | dma_addr_t dma_address; |
2e242fa9 | 2799 | int trim_sg = 0; |
1da177e4 | 2800 | |
cedc9a47 JG |
2801 | /* we must lengthen transfers to end on a 32-bit boundary */ |
2802 | qc->pad_len = sg->length & 3; | |
2803 | if (qc->pad_len) { | |
2804 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
2805 | struct scatterlist *psg = &qc->pad_sgent; | |
2806 | ||
a4631474 | 2807 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
2808 | |
2809 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
2810 | ||
2811 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
2812 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
2813 | qc->pad_len); | |
2814 | ||
2815 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
2816 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
2817 | /* trim sg */ | |
2818 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
2819 | if (sg->length == 0) |
2820 | trim_sg = 1; | |
cedc9a47 JG |
2821 | |
2822 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
2823 | sg->length, qc->pad_len); | |
2824 | } | |
2825 | ||
2e242fa9 TH |
2826 | if (trim_sg) { |
2827 | qc->n_elem--; | |
e1410f2d JG |
2828 | goto skip_map; |
2829 | } | |
2830 | ||
1da177e4 | 2831 | dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt, |
32529e01 | 2832 | sg->length, dir); |
537a95d9 TH |
2833 | if (dma_mapping_error(dma_address)) { |
2834 | /* restore sg */ | |
2835 | sg->length += qc->pad_len; | |
1da177e4 | 2836 | return -1; |
537a95d9 | 2837 | } |
1da177e4 LT |
2838 | |
2839 | sg_dma_address(sg) = dma_address; | |
32529e01 | 2840 | sg_dma_len(sg) = sg->length; |
1da177e4 | 2841 | |
2e242fa9 | 2842 | skip_map: |
1da177e4 LT |
2843 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
2844 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
2845 | ||
2846 | return 0; | |
2847 | } | |
2848 | ||
2849 | /** | |
0cba632b JG |
2850 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
2851 | * @qc: Command with scatter-gather table to be mapped. | |
2852 | * | |
2853 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
2854 | * |
2855 | * LOCKING: | |
2856 | * spin_lock_irqsave(host_set lock) | |
2857 | * | |
2858 | * RETURNS: | |
0cba632b | 2859 | * Zero on success, negative on error. |
1da177e4 LT |
2860 | * |
2861 | */ | |
2862 | ||
2863 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
2864 | { | |
2865 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
2866 | struct scatterlist *sg = qc->__sg; |
2867 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 2868 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 LT |
2869 | |
2870 | VPRINTK("ENTER, ata%u\n", ap->id); | |
a4631474 | 2871 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 2872 | |
cedc9a47 JG |
2873 | /* we must lengthen transfers to end on a 32-bit boundary */ |
2874 | qc->pad_len = lsg->length & 3; | |
2875 | if (qc->pad_len) { | |
2876 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
2877 | struct scatterlist *psg = &qc->pad_sgent; | |
2878 | unsigned int offset; | |
2879 | ||
a4631474 | 2880 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
2881 | |
2882 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
2883 | ||
2884 | /* | |
2885 | * psg->page/offset are used to copy to-be-written | |
2886 | * data in this function or read data in ata_sg_clean. | |
2887 | */ | |
2888 | offset = lsg->offset + lsg->length - qc->pad_len; | |
2889 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
2890 | psg->offset = offset_in_page(offset); | |
2891 | ||
2892 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
2893 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
2894 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 2895 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
2896 | } |
2897 | ||
2898 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
2899 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
2900 | /* trim last sg */ | |
2901 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
2902 | if (lsg->length == 0) |
2903 | trim_sg = 1; | |
cedc9a47 JG |
2904 | |
2905 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
2906 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
2907 | } | |
2908 | ||
e1410f2d JG |
2909 | pre_n_elem = qc->n_elem; |
2910 | if (trim_sg && pre_n_elem) | |
2911 | pre_n_elem--; | |
2912 | ||
2913 | if (!pre_n_elem) { | |
2914 | n_elem = 0; | |
2915 | goto skip_map; | |
2916 | } | |
2917 | ||
1da177e4 | 2918 | dir = qc->dma_dir; |
e1410f2d | 2919 | n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
2920 | if (n_elem < 1) { |
2921 | /* restore last sg */ | |
2922 | lsg->length += qc->pad_len; | |
1da177e4 | 2923 | return -1; |
537a95d9 | 2924 | } |
1da177e4 LT |
2925 | |
2926 | DPRINTK("%d sg elements mapped\n", n_elem); | |
2927 | ||
e1410f2d | 2928 | skip_map: |
1da177e4 LT |
2929 | qc->n_elem = n_elem; |
2930 | ||
2931 | return 0; | |
2932 | } | |
2933 | ||
40e8c82c TH |
2934 | /** |
2935 | * ata_poll_qc_complete - turn irq back on and finish qc | |
2936 | * @qc: Command to complete | |
8e8b77dd | 2937 | * @err_mask: ATA status register content |
40e8c82c TH |
2938 | * |
2939 | * LOCKING: | |
2940 | * None. (grabs host lock) | |
2941 | */ | |
2942 | ||
a22e2eb0 | 2943 | void ata_poll_qc_complete(struct ata_queued_cmd *qc) |
40e8c82c TH |
2944 | { |
2945 | struct ata_port *ap = qc->ap; | |
b8f6153e | 2946 | unsigned long flags; |
40e8c82c | 2947 | |
b8f6153e | 2948 | spin_lock_irqsave(&ap->host_set->lock, flags); |
40e8c82c TH |
2949 | ap->flags &= ~ATA_FLAG_NOINTR; |
2950 | ata_irq_on(ap); | |
a22e2eb0 | 2951 | ata_qc_complete(qc); |
b8f6153e | 2952 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
40e8c82c TH |
2953 | } |
2954 | ||
1da177e4 | 2955 | /** |
c893a3ae | 2956 | * ata_pio_poll - poll using PIO, depending on current state |
6f0ef4fa | 2957 | * @ap: the target ata_port |
1da177e4 LT |
2958 | * |
2959 | * LOCKING: | |
0cba632b | 2960 | * None. (executing in kernel thread context) |
1da177e4 LT |
2961 | * |
2962 | * RETURNS: | |
6f0ef4fa | 2963 | * timeout value to use |
1da177e4 LT |
2964 | */ |
2965 | ||
2966 | static unsigned long ata_pio_poll(struct ata_port *ap) | |
2967 | { | |
c14b8331 | 2968 | struct ata_queued_cmd *qc; |
1da177e4 | 2969 | u8 status; |
14be71f4 AL |
2970 | unsigned int poll_state = HSM_ST_UNKNOWN; |
2971 | unsigned int reg_state = HSM_ST_UNKNOWN; | |
14be71f4 | 2972 | |
c14b8331 | 2973 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 2974 | WARN_ON(qc == NULL); |
c14b8331 | 2975 | |
14be71f4 AL |
2976 | switch (ap->hsm_task_state) { |
2977 | case HSM_ST: | |
2978 | case HSM_ST_POLL: | |
2979 | poll_state = HSM_ST_POLL; | |
2980 | reg_state = HSM_ST; | |
1da177e4 | 2981 | break; |
14be71f4 AL |
2982 | case HSM_ST_LAST: |
2983 | case HSM_ST_LAST_POLL: | |
2984 | poll_state = HSM_ST_LAST_POLL; | |
2985 | reg_state = HSM_ST_LAST; | |
1da177e4 LT |
2986 | break; |
2987 | default: | |
2988 | BUG(); | |
2989 | break; | |
2990 | } | |
2991 | ||
2992 | status = ata_chk_status(ap); | |
2993 | if (status & ATA_BUSY) { | |
2994 | if (time_after(jiffies, ap->pio_task_timeout)) { | |
11a56d24 | 2995 | qc->err_mask |= AC_ERR_TIMEOUT; |
7c398335 | 2996 | ap->hsm_task_state = HSM_ST_TMOUT; |
1da177e4 LT |
2997 | return 0; |
2998 | } | |
14be71f4 | 2999 | ap->hsm_task_state = poll_state; |
1da177e4 LT |
3000 | return ATA_SHORT_PAUSE; |
3001 | } | |
3002 | ||
14be71f4 | 3003 | ap->hsm_task_state = reg_state; |
1da177e4 LT |
3004 | return 0; |
3005 | } | |
3006 | ||
3007 | /** | |
6f0ef4fa RD |
3008 | * ata_pio_complete - check if drive is busy or idle |
3009 | * @ap: the target ata_port | |
1da177e4 LT |
3010 | * |
3011 | * LOCKING: | |
0cba632b | 3012 | * None. (executing in kernel thread context) |
7fb6ec28 JG |
3013 | * |
3014 | * RETURNS: | |
3015 | * Non-zero if qc completed, zero otherwise. | |
1da177e4 LT |
3016 | */ |
3017 | ||
7fb6ec28 | 3018 | static int ata_pio_complete (struct ata_port *ap) |
1da177e4 LT |
3019 | { |
3020 | struct ata_queued_cmd *qc; | |
3021 | u8 drv_stat; | |
3022 | ||
3023 | /* | |
31433ea3 AC |
3024 | * This is purely heuristic. This is a fast path. Sometimes when |
3025 | * we enter, BSY will be cleared in a chk-status or two. If not, | |
3026 | * the drive is probably seeking or something. Snooze for a couple | |
3027 | * msecs, then chk-status again. If still busy, fall back to | |
14be71f4 | 3028 | * HSM_ST_POLL state. |
1da177e4 | 3029 | */ |
fe79e683 AL |
3030 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3031 | if (drv_stat & ATA_BUSY) { | |
1da177e4 | 3032 | msleep(2); |
fe79e683 AL |
3033 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3034 | if (drv_stat & ATA_BUSY) { | |
14be71f4 | 3035 | ap->hsm_task_state = HSM_ST_LAST_POLL; |
1da177e4 | 3036 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
7fb6ec28 | 3037 | return 0; |
1da177e4 LT |
3038 | } |
3039 | } | |
3040 | ||
c14b8331 | 3041 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3042 | WARN_ON(qc == NULL); |
c14b8331 | 3043 | |
1da177e4 LT |
3044 | drv_stat = ata_wait_idle(ap); |
3045 | if (!ata_ok(drv_stat)) { | |
1c848984 | 3046 | qc->err_mask |= __ac_err_mask(drv_stat); |
14be71f4 | 3047 | ap->hsm_task_state = HSM_ST_ERR; |
7fb6ec28 | 3048 | return 0; |
1da177e4 LT |
3049 | } |
3050 | ||
14be71f4 | 3051 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3052 | |
a4631474 | 3053 | WARN_ON(qc->err_mask); |
a22e2eb0 | 3054 | ata_poll_qc_complete(qc); |
7fb6ec28 JG |
3055 | |
3056 | /* another command may start at this point */ | |
3057 | ||
3058 | return 1; | |
1da177e4 LT |
3059 | } |
3060 | ||
0baab86b EF |
3061 | |
3062 | /** | |
c893a3ae | 3063 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
3064 | * @buf: Buffer to swap |
3065 | * @buf_words: Number of 16-bit words in buffer. | |
3066 | * | |
3067 | * Swap halves of 16-bit words if needed to convert from | |
3068 | * little-endian byte order to native cpu byte order, or | |
3069 | * vice-versa. | |
3070 | * | |
3071 | * LOCKING: | |
6f0ef4fa | 3072 | * Inherited from caller. |
0baab86b | 3073 | */ |
1da177e4 LT |
3074 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
3075 | { | |
3076 | #ifdef __BIG_ENDIAN | |
3077 | unsigned int i; | |
3078 | ||
3079 | for (i = 0; i < buf_words; i++) | |
3080 | buf[i] = le16_to_cpu(buf[i]); | |
3081 | #endif /* __BIG_ENDIAN */ | |
3082 | } | |
3083 | ||
6ae4cfb5 AL |
3084 | /** |
3085 | * ata_mmio_data_xfer - Transfer data by MMIO | |
3086 | * @ap: port to read/write | |
3087 | * @buf: data buffer | |
3088 | * @buflen: buffer length | |
344babaa | 3089 | * @write_data: read/write |
6ae4cfb5 AL |
3090 | * |
3091 | * Transfer data from/to the device data register by MMIO. | |
3092 | * | |
3093 | * LOCKING: | |
3094 | * Inherited from caller. | |
6ae4cfb5 AL |
3095 | */ |
3096 | ||
1da177e4 LT |
3097 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3098 | unsigned int buflen, int write_data) | |
3099 | { | |
3100 | unsigned int i; | |
3101 | unsigned int words = buflen >> 1; | |
3102 | u16 *buf16 = (u16 *) buf; | |
3103 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; | |
3104 | ||
6ae4cfb5 | 3105 | /* Transfer multiple of 2 bytes */ |
1da177e4 LT |
3106 | if (write_data) { |
3107 | for (i = 0; i < words; i++) | |
3108 | writew(le16_to_cpu(buf16[i]), mmio); | |
3109 | } else { | |
3110 | for (i = 0; i < words; i++) | |
3111 | buf16[i] = cpu_to_le16(readw(mmio)); | |
3112 | } | |
6ae4cfb5 AL |
3113 | |
3114 | /* Transfer trailing 1 byte, if any. */ | |
3115 | if (unlikely(buflen & 0x01)) { | |
3116 | u16 align_buf[1] = { 0 }; | |
3117 | unsigned char *trailing_buf = buf + buflen - 1; | |
3118 | ||
3119 | if (write_data) { | |
3120 | memcpy(align_buf, trailing_buf, 1); | |
3121 | writew(le16_to_cpu(align_buf[0]), mmio); | |
3122 | } else { | |
3123 | align_buf[0] = cpu_to_le16(readw(mmio)); | |
3124 | memcpy(trailing_buf, align_buf, 1); | |
3125 | } | |
3126 | } | |
1da177e4 LT |
3127 | } |
3128 | ||
6ae4cfb5 AL |
3129 | /** |
3130 | * ata_pio_data_xfer - Transfer data by PIO | |
3131 | * @ap: port to read/write | |
3132 | * @buf: data buffer | |
3133 | * @buflen: buffer length | |
344babaa | 3134 | * @write_data: read/write |
6ae4cfb5 AL |
3135 | * |
3136 | * Transfer data from/to the device data register by PIO. | |
3137 | * | |
3138 | * LOCKING: | |
3139 | * Inherited from caller. | |
6ae4cfb5 AL |
3140 | */ |
3141 | ||
1da177e4 LT |
3142 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3143 | unsigned int buflen, int write_data) | |
3144 | { | |
6ae4cfb5 | 3145 | unsigned int words = buflen >> 1; |
1da177e4 | 3146 | |
6ae4cfb5 | 3147 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 3148 | if (write_data) |
6ae4cfb5 | 3149 | outsw(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 3150 | else |
6ae4cfb5 AL |
3151 | insw(ap->ioaddr.data_addr, buf, words); |
3152 | ||
3153 | /* Transfer trailing 1 byte, if any. */ | |
3154 | if (unlikely(buflen & 0x01)) { | |
3155 | u16 align_buf[1] = { 0 }; | |
3156 | unsigned char *trailing_buf = buf + buflen - 1; | |
3157 | ||
3158 | if (write_data) { | |
3159 | memcpy(align_buf, trailing_buf, 1); | |
3160 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); | |
3161 | } else { | |
3162 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); | |
3163 | memcpy(trailing_buf, align_buf, 1); | |
3164 | } | |
3165 | } | |
1da177e4 LT |
3166 | } |
3167 | ||
6ae4cfb5 AL |
3168 | /** |
3169 | * ata_data_xfer - Transfer data from/to the data register. | |
3170 | * @ap: port to read/write | |
3171 | * @buf: data buffer | |
3172 | * @buflen: buffer length | |
3173 | * @do_write: read/write | |
3174 | * | |
3175 | * Transfer data from/to the device data register. | |
3176 | * | |
3177 | * LOCKING: | |
3178 | * Inherited from caller. | |
6ae4cfb5 AL |
3179 | */ |
3180 | ||
1da177e4 LT |
3181 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
3182 | unsigned int buflen, int do_write) | |
3183 | { | |
a1bd9e68 AC |
3184 | /* Make the crap hardware pay the costs not the good stuff */ |
3185 | if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) { | |
3186 | unsigned long flags; | |
3187 | local_irq_save(flags); | |
3188 | if (ap->flags & ATA_FLAG_MMIO) | |
3189 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3190 | else | |
3191 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3192 | local_irq_restore(flags); | |
3193 | } else { | |
3194 | if (ap->flags & ATA_FLAG_MMIO) | |
3195 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3196 | else | |
3197 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3198 | } | |
1da177e4 LT |
3199 | } |
3200 | ||
6ae4cfb5 AL |
3201 | /** |
3202 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. | |
3203 | * @qc: Command on going | |
3204 | * | |
3205 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. | |
3206 | * | |
3207 | * LOCKING: | |
3208 | * Inherited from caller. | |
3209 | */ | |
3210 | ||
1da177e4 LT |
3211 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
3212 | { | |
3213 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3214 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3215 | struct ata_port *ap = qc->ap; |
3216 | struct page *page; | |
3217 | unsigned int offset; | |
3218 | unsigned char *buf; | |
3219 | ||
3220 | if (qc->cursect == (qc->nsect - 1)) | |
14be71f4 | 3221 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3222 | |
3223 | page = sg[qc->cursg].page; | |
3224 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; | |
3225 | ||
3226 | /* get the current page and offset */ | |
3227 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3228 | offset %= PAGE_SIZE; | |
3229 | ||
3230 | buf = kmap(page) + offset; | |
3231 | ||
3232 | qc->cursect++; | |
3233 | qc->cursg_ofs++; | |
3234 | ||
32529e01 | 3235 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
1da177e4 LT |
3236 | qc->cursg++; |
3237 | qc->cursg_ofs = 0; | |
3238 | } | |
3239 | ||
3240 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3241 | ||
3242 | /* do the actual data transfer */ | |
3243 | do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
3244 | ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); | |
3245 | ||
3246 | kunmap(page); | |
3247 | } | |
3248 | ||
6ae4cfb5 AL |
3249 | /** |
3250 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3251 | * @qc: Command on going | |
3252 | * @bytes: number of bytes | |
3253 | * | |
3254 | * Transfer Transfer data from/to the ATAPI device. | |
3255 | * | |
3256 | * LOCKING: | |
3257 | * Inherited from caller. | |
3258 | * | |
3259 | */ | |
3260 | ||
1da177e4 LT |
3261 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
3262 | { | |
3263 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3264 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3265 | struct ata_port *ap = qc->ap; |
3266 | struct page *page; | |
3267 | unsigned char *buf; | |
3268 | unsigned int offset, count; | |
3269 | ||
563a6e1f | 3270 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 3271 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3272 | |
3273 | next_sg: | |
563a6e1f | 3274 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 3275 | /* |
563a6e1f AL |
3276 | * The end of qc->sg is reached and the device expects |
3277 | * more data to transfer. In order not to overrun qc->sg | |
3278 | * and fulfill length specified in the byte count register, | |
3279 | * - for read case, discard trailing data from the device | |
3280 | * - for write case, padding zero data to the device | |
3281 | */ | |
3282 | u16 pad_buf[1] = { 0 }; | |
3283 | unsigned int words = bytes >> 1; | |
3284 | unsigned int i; | |
3285 | ||
3286 | if (words) /* warning if bytes > 1 */ | |
7fb6ec28 | 3287 | printk(KERN_WARNING "ata%u: %u bytes trailing data\n", |
563a6e1f AL |
3288 | ap->id, bytes); |
3289 | ||
3290 | for (i = 0; i < words; i++) | |
3291 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); | |
3292 | ||
14be71f4 | 3293 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
3294 | return; |
3295 | } | |
3296 | ||
cedc9a47 | 3297 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 3298 | |
1da177e4 LT |
3299 | page = sg->page; |
3300 | offset = sg->offset + qc->cursg_ofs; | |
3301 | ||
3302 | /* get the current page and offset */ | |
3303 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3304 | offset %= PAGE_SIZE; | |
3305 | ||
6952df03 | 3306 | /* don't overrun current sg */ |
32529e01 | 3307 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
3308 | |
3309 | /* don't cross page boundaries */ | |
3310 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
3311 | ||
3312 | buf = kmap(page) + offset; | |
3313 | ||
3314 | bytes -= count; | |
3315 | qc->curbytes += count; | |
3316 | qc->cursg_ofs += count; | |
3317 | ||
32529e01 | 3318 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
3319 | qc->cursg++; |
3320 | qc->cursg_ofs = 0; | |
3321 | } | |
3322 | ||
3323 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3324 | ||
3325 | /* do the actual data transfer */ | |
3326 | ata_data_xfer(ap, buf, count, do_write); | |
3327 | ||
3328 | kunmap(page); | |
3329 | ||
563a6e1f | 3330 | if (bytes) |
1da177e4 | 3331 | goto next_sg; |
1da177e4 LT |
3332 | } |
3333 | ||
6ae4cfb5 AL |
3334 | /** |
3335 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3336 | * @qc: Command on going | |
3337 | * | |
3338 | * Transfer Transfer data from/to the ATAPI device. | |
3339 | * | |
3340 | * LOCKING: | |
3341 | * Inherited from caller. | |
6ae4cfb5 AL |
3342 | */ |
3343 | ||
1da177e4 LT |
3344 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
3345 | { | |
3346 | struct ata_port *ap = qc->ap; | |
3347 | struct ata_device *dev = qc->dev; | |
3348 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
3349 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
3350 | ||
3351 | ap->ops->tf_read(ap, &qc->tf); | |
3352 | ireason = qc->tf.nsect; | |
3353 | bc_lo = qc->tf.lbam; | |
3354 | bc_hi = qc->tf.lbah; | |
3355 | bytes = (bc_hi << 8) | bc_lo; | |
3356 | ||
3357 | /* shall be cleared to zero, indicating xfer of data */ | |
3358 | if (ireason & (1 << 0)) | |
3359 | goto err_out; | |
3360 | ||
3361 | /* make sure transfer direction matches expected */ | |
3362 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
3363 | if (do_write != i_write) | |
3364 | goto err_out; | |
3365 | ||
3366 | __atapi_pio_bytes(qc, bytes); | |
3367 | ||
3368 | return; | |
3369 | ||
3370 | err_out: | |
3371 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", | |
3372 | ap->id, dev->devno); | |
11a56d24 | 3373 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3374 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3375 | } |
3376 | ||
3377 | /** | |
6f0ef4fa RD |
3378 | * ata_pio_block - start PIO on a block |
3379 | * @ap: the target ata_port | |
1da177e4 LT |
3380 | * |
3381 | * LOCKING: | |
0cba632b | 3382 | * None. (executing in kernel thread context) |
1da177e4 LT |
3383 | */ |
3384 | ||
3385 | static void ata_pio_block(struct ata_port *ap) | |
3386 | { | |
3387 | struct ata_queued_cmd *qc; | |
3388 | u8 status; | |
3389 | ||
3390 | /* | |
6f0ef4fa | 3391 | * This is purely heuristic. This is a fast path. |
1da177e4 LT |
3392 | * Sometimes when we enter, BSY will be cleared in |
3393 | * a chk-status or two. If not, the drive is probably seeking | |
3394 | * or something. Snooze for a couple msecs, then | |
3395 | * chk-status again. If still busy, fall back to | |
14be71f4 | 3396 | * HSM_ST_POLL state. |
1da177e4 LT |
3397 | */ |
3398 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
3399 | if (status & ATA_BUSY) { | |
3400 | msleep(2); | |
3401 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
3402 | if (status & ATA_BUSY) { | |
14be71f4 | 3403 | ap->hsm_task_state = HSM_ST_POLL; |
1da177e4 LT |
3404 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
3405 | return; | |
3406 | } | |
3407 | } | |
3408 | ||
3409 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
a4631474 | 3410 | WARN_ON(qc == NULL); |
1da177e4 | 3411 | |
fe79e683 AL |
3412 | /* check error */ |
3413 | if (status & (ATA_ERR | ATA_DF)) { | |
3414 | qc->err_mask |= AC_ERR_DEV; | |
3415 | ap->hsm_task_state = HSM_ST_ERR; | |
3416 | return; | |
3417 | } | |
3418 | ||
3419 | /* transfer data if any */ | |
1da177e4 | 3420 | if (is_atapi_taskfile(&qc->tf)) { |
fe79e683 | 3421 | /* DRQ=0 means no more data to transfer */ |
1da177e4 | 3422 | if ((status & ATA_DRQ) == 0) { |
14be71f4 | 3423 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3424 | return; |
3425 | } | |
3426 | ||
3427 | atapi_pio_bytes(qc); | |
3428 | } else { | |
3429 | /* handle BSY=0, DRQ=0 as error */ | |
3430 | if ((status & ATA_DRQ) == 0) { | |
11a56d24 | 3431 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3432 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3433 | return; |
3434 | } | |
3435 | ||
3436 | ata_pio_sector(qc); | |
3437 | } | |
3438 | } | |
3439 | ||
3440 | static void ata_pio_error(struct ata_port *ap) | |
3441 | { | |
3442 | struct ata_queued_cmd *qc; | |
a7dac447 | 3443 | |
1da177e4 | 3444 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3445 | WARN_ON(qc == NULL); |
1da177e4 | 3446 | |
0565c26d AL |
3447 | if (qc->tf.command != ATA_CMD_PACKET) |
3448 | printk(KERN_WARNING "ata%u: PIO error\n", ap->id); | |
3449 | ||
1c848984 AL |
3450 | /* make sure qc->err_mask is available to |
3451 | * know what's wrong and recover | |
3452 | */ | |
a4631474 | 3453 | WARN_ON(qc->err_mask == 0); |
1c848984 | 3454 | |
14be71f4 | 3455 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3456 | |
a22e2eb0 | 3457 | ata_poll_qc_complete(qc); |
1da177e4 LT |
3458 | } |
3459 | ||
3460 | static void ata_pio_task(void *_data) | |
3461 | { | |
3462 | struct ata_port *ap = _data; | |
7fb6ec28 JG |
3463 | unsigned long timeout; |
3464 | int qc_completed; | |
3465 | ||
3466 | fsm_start: | |
3467 | timeout = 0; | |
3468 | qc_completed = 0; | |
1da177e4 | 3469 | |
14be71f4 AL |
3470 | switch (ap->hsm_task_state) { |
3471 | case HSM_ST_IDLE: | |
1da177e4 LT |
3472 | return; |
3473 | ||
14be71f4 | 3474 | case HSM_ST: |
1da177e4 LT |
3475 | ata_pio_block(ap); |
3476 | break; | |
3477 | ||
14be71f4 | 3478 | case HSM_ST_LAST: |
7fb6ec28 | 3479 | qc_completed = ata_pio_complete(ap); |
1da177e4 LT |
3480 | break; |
3481 | ||
14be71f4 AL |
3482 | case HSM_ST_POLL: |
3483 | case HSM_ST_LAST_POLL: | |
1da177e4 LT |
3484 | timeout = ata_pio_poll(ap); |
3485 | break; | |
3486 | ||
14be71f4 AL |
3487 | case HSM_ST_TMOUT: |
3488 | case HSM_ST_ERR: | |
1da177e4 LT |
3489 | ata_pio_error(ap); |
3490 | return; | |
3491 | } | |
3492 | ||
3493 | if (timeout) | |
95064379 | 3494 | ata_queue_delayed_pio_task(ap, timeout); |
7fb6ec28 JG |
3495 | else if (!qc_completed) |
3496 | goto fsm_start; | |
1da177e4 LT |
3497 | } |
3498 | ||
1da177e4 LT |
3499 | /** |
3500 | * ata_qc_timeout - Handle timeout of queued command | |
3501 | * @qc: Command that timed out | |
3502 | * | |
3503 | * Some part of the kernel (currently, only the SCSI layer) | |
3504 | * has noticed that the active command on port @ap has not | |
3505 | * completed after a specified length of time. Handle this | |
3506 | * condition by disabling DMA (if necessary) and completing | |
3507 | * transactions, with error if necessary. | |
3508 | * | |
3509 | * This also handles the case of the "lost interrupt", where | |
3510 | * for some reason (possibly hardware bug, possibly driver bug) | |
3511 | * an interrupt was not delivered to the driver, even though the | |
3512 | * transaction completed successfully. | |
3513 | * | |
3514 | * LOCKING: | |
0cba632b | 3515 | * Inherited from SCSI layer (none, can sleep) |
1da177e4 LT |
3516 | */ |
3517 | ||
3518 | static void ata_qc_timeout(struct ata_queued_cmd *qc) | |
3519 | { | |
3520 | struct ata_port *ap = qc->ap; | |
b8f6153e | 3521 | struct ata_host_set *host_set = ap->host_set; |
1da177e4 | 3522 | u8 host_stat = 0, drv_stat; |
b8f6153e | 3523 | unsigned long flags; |
1da177e4 LT |
3524 | |
3525 | DPRINTK("ENTER\n"); | |
3526 | ||
c18d06f8 TH |
3527 | ata_flush_pio_tasks(ap); |
3528 | ap->hsm_task_state = HSM_ST_IDLE; | |
3529 | ||
b8f6153e JG |
3530 | spin_lock_irqsave(&host_set->lock, flags); |
3531 | ||
1da177e4 LT |
3532 | switch (qc->tf.protocol) { |
3533 | ||
3534 | case ATA_PROT_DMA: | |
3535 | case ATA_PROT_ATAPI_DMA: | |
3536 | host_stat = ap->ops->bmdma_status(ap); | |
3537 | ||
3538 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 3539 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
3540 | |
3541 | /* fall through */ | |
3542 | ||
3543 | default: | |
3544 | ata_altstatus(ap); | |
3545 | drv_stat = ata_chk_status(ap); | |
3546 | ||
3547 | /* ack bmdma irq events */ | |
3548 | ap->ops->irq_clear(ap); | |
3549 | ||
3550 | printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", | |
3551 | ap->id, qc->tf.command, drv_stat, host_stat); | |
3552 | ||
3553 | /* complete taskfile transaction */ | |
a22e2eb0 | 3554 | qc->err_mask |= ac_err_mask(drv_stat); |
1da177e4 LT |
3555 | break; |
3556 | } | |
b8f6153e JG |
3557 | |
3558 | spin_unlock_irqrestore(&host_set->lock, flags); | |
3559 | ||
a72ec4ce TH |
3560 | ata_eh_qc_complete(qc); |
3561 | ||
1da177e4 LT |
3562 | DPRINTK("EXIT\n"); |
3563 | } | |
3564 | ||
3565 | /** | |
3566 | * ata_eng_timeout - Handle timeout of queued command | |
3567 | * @ap: Port on which timed-out command is active | |
3568 | * | |
3569 | * Some part of the kernel (currently, only the SCSI layer) | |
3570 | * has noticed that the active command on port @ap has not | |
3571 | * completed after a specified length of time. Handle this | |
3572 | * condition by disabling DMA (if necessary) and completing | |
3573 | * transactions, with error if necessary. | |
3574 | * | |
3575 | * This also handles the case of the "lost interrupt", where | |
3576 | * for some reason (possibly hardware bug, possibly driver bug) | |
3577 | * an interrupt was not delivered to the driver, even though the | |
3578 | * transaction completed successfully. | |
3579 | * | |
3580 | * LOCKING: | |
3581 | * Inherited from SCSI layer (none, can sleep) | |
3582 | */ | |
3583 | ||
3584 | void ata_eng_timeout(struct ata_port *ap) | |
3585 | { | |
1da177e4 LT |
3586 | DPRINTK("ENTER\n"); |
3587 | ||
f6379020 | 3588 | ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag)); |
1da177e4 | 3589 | |
1da177e4 LT |
3590 | DPRINTK("EXIT\n"); |
3591 | } | |
3592 | ||
3593 | /** | |
3594 | * ata_qc_new - Request an available ATA command, for queueing | |
3595 | * @ap: Port associated with device @dev | |
3596 | * @dev: Device from whom we request an available command structure | |
3597 | * | |
3598 | * LOCKING: | |
0cba632b | 3599 | * None. |
1da177e4 LT |
3600 | */ |
3601 | ||
3602 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
3603 | { | |
3604 | struct ata_queued_cmd *qc = NULL; | |
3605 | unsigned int i; | |
3606 | ||
3607 | for (i = 0; i < ATA_MAX_QUEUE; i++) | |
3608 | if (!test_and_set_bit(i, &ap->qactive)) { | |
3609 | qc = ata_qc_from_tag(ap, i); | |
3610 | break; | |
3611 | } | |
3612 | ||
3613 | if (qc) | |
3614 | qc->tag = i; | |
3615 | ||
3616 | return qc; | |
3617 | } | |
3618 | ||
3619 | /** | |
3620 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
3621 | * @ap: Port associated with device @dev | |
3622 | * @dev: Device from whom we request an available command structure | |
3623 | * | |
3624 | * LOCKING: | |
0cba632b | 3625 | * None. |
1da177e4 LT |
3626 | */ |
3627 | ||
3628 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, | |
3629 | struct ata_device *dev) | |
3630 | { | |
3631 | struct ata_queued_cmd *qc; | |
3632 | ||
3633 | qc = ata_qc_new(ap); | |
3634 | if (qc) { | |
1da177e4 LT |
3635 | qc->scsicmd = NULL; |
3636 | qc->ap = ap; | |
3637 | qc->dev = dev; | |
1da177e4 | 3638 | |
2c13b7ce | 3639 | ata_qc_reinit(qc); |
1da177e4 LT |
3640 | } |
3641 | ||
3642 | return qc; | |
3643 | } | |
3644 | ||
1da177e4 LT |
3645 | /** |
3646 | * ata_qc_free - free unused ata_queued_cmd | |
3647 | * @qc: Command to complete | |
3648 | * | |
3649 | * Designed to free unused ata_queued_cmd object | |
3650 | * in case something prevents using it. | |
3651 | * | |
3652 | * LOCKING: | |
0cba632b | 3653 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3654 | */ |
3655 | void ata_qc_free(struct ata_queued_cmd *qc) | |
3656 | { | |
4ba946e9 TH |
3657 | struct ata_port *ap = qc->ap; |
3658 | unsigned int tag; | |
3659 | ||
a4631474 | 3660 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 3661 | |
4ba946e9 TH |
3662 | qc->flags = 0; |
3663 | tag = qc->tag; | |
3664 | if (likely(ata_tag_valid(tag))) { | |
3665 | if (tag == ap->active_tag) | |
3666 | ap->active_tag = ATA_TAG_POISON; | |
3667 | qc->tag = ATA_TAG_POISON; | |
3668 | clear_bit(tag, &ap->qactive); | |
3669 | } | |
1da177e4 LT |
3670 | } |
3671 | ||
76014427 | 3672 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 3673 | { |
a4631474 TH |
3674 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
3675 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
3676 | |
3677 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
3678 | ata_sg_clean(qc); | |
3679 | ||
3f3791d3 AL |
3680 | /* atapi: mark qc as inactive to prevent the interrupt handler |
3681 | * from completing the command twice later, before the error handler | |
3682 | * is called. (when rc != 0 and atapi request sense is needed) | |
3683 | */ | |
3684 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
3685 | ||
1da177e4 | 3686 | /* call completion callback */ |
77853bf2 | 3687 | qc->complete_fn(qc); |
1da177e4 LT |
3688 | } |
3689 | ||
3690 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) | |
3691 | { | |
3692 | struct ata_port *ap = qc->ap; | |
3693 | ||
3694 | switch (qc->tf.protocol) { | |
3695 | case ATA_PROT_DMA: | |
3696 | case ATA_PROT_ATAPI_DMA: | |
3697 | return 1; | |
3698 | ||
3699 | case ATA_PROT_ATAPI: | |
3700 | case ATA_PROT_PIO: | |
3701 | case ATA_PROT_PIO_MULT: | |
3702 | if (ap->flags & ATA_FLAG_PIO_DMA) | |
3703 | return 1; | |
3704 | ||
3705 | /* fall through */ | |
3706 | ||
3707 | default: | |
3708 | return 0; | |
3709 | } | |
3710 | ||
3711 | /* never reached */ | |
3712 | } | |
3713 | ||
3714 | /** | |
3715 | * ata_qc_issue - issue taskfile to device | |
3716 | * @qc: command to issue to device | |
3717 | * | |
3718 | * Prepare an ATA command to submission to device. | |
3719 | * This includes mapping the data into a DMA-able | |
3720 | * area, filling in the S/G table, and finally | |
3721 | * writing the taskfile to hardware, starting the command. | |
3722 | * | |
3723 | * LOCKING: | |
3724 | * spin_lock_irqsave(host_set lock) | |
3725 | * | |
3726 | * RETURNS: | |
9a3d9eb0 | 3727 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
3728 | */ |
3729 | ||
9a3d9eb0 | 3730 | unsigned int ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
3731 | { |
3732 | struct ata_port *ap = qc->ap; | |
3733 | ||
3734 | if (ata_should_dma_map(qc)) { | |
3735 | if (qc->flags & ATA_QCFLAG_SG) { | |
3736 | if (ata_sg_setup(qc)) | |
8e436af9 | 3737 | goto sg_err; |
1da177e4 LT |
3738 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
3739 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 3740 | goto sg_err; |
1da177e4 LT |
3741 | } |
3742 | } else { | |
3743 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
3744 | } | |
3745 | ||
3746 | ap->ops->qc_prep(qc); | |
3747 | ||
3748 | qc->ap->active_tag = qc->tag; | |
3749 | qc->flags |= ATA_QCFLAG_ACTIVE; | |
3750 | ||
3751 | return ap->ops->qc_issue(qc); | |
3752 | ||
8e436af9 TH |
3753 | sg_err: |
3754 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
9a3d9eb0 | 3755 | return AC_ERR_SYSTEM; |
1da177e4 LT |
3756 | } |
3757 | ||
0baab86b | 3758 | |
1da177e4 LT |
3759 | /** |
3760 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
3761 | * @qc: command to issue to device | |
3762 | * | |
3763 | * Using various libata functions and hooks, this function | |
3764 | * starts an ATA command. ATA commands are grouped into | |
3765 | * classes called "protocols", and issuing each type of protocol | |
3766 | * is slightly different. | |
3767 | * | |
0baab86b EF |
3768 | * May be used as the qc_issue() entry in ata_port_operations. |
3769 | * | |
1da177e4 LT |
3770 | * LOCKING: |
3771 | * spin_lock_irqsave(host_set lock) | |
3772 | * | |
3773 | * RETURNS: | |
9a3d9eb0 | 3774 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
3775 | */ |
3776 | ||
9a3d9eb0 | 3777 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
3778 | { |
3779 | struct ata_port *ap = qc->ap; | |
3780 | ||
3781 | ata_dev_select(ap, qc->dev->devno, 1, 0); | |
3782 | ||
3783 | switch (qc->tf.protocol) { | |
3784 | case ATA_PROT_NODATA: | |
e5338254 | 3785 | ata_tf_to_host(ap, &qc->tf); |
1da177e4 LT |
3786 | break; |
3787 | ||
3788 | case ATA_PROT_DMA: | |
3789 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ | |
3790 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
3791 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
3792 | break; | |
3793 | ||
3794 | case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ | |
3795 | ata_qc_set_polling(qc); | |
e5338254 | 3796 | ata_tf_to_host(ap, &qc->tf); |
14be71f4 | 3797 | ap->hsm_task_state = HSM_ST; |
95064379 | 3798 | ata_queue_pio_task(ap); |
1da177e4 LT |
3799 | break; |
3800 | ||
3801 | case ATA_PROT_ATAPI: | |
3802 | ata_qc_set_polling(qc); | |
e5338254 | 3803 | ata_tf_to_host(ap, &qc->tf); |
95064379 | 3804 | ata_queue_packet_task(ap); |
1da177e4 LT |
3805 | break; |
3806 | ||
3807 | case ATA_PROT_ATAPI_NODATA: | |
c1389503 | 3808 | ap->flags |= ATA_FLAG_NOINTR; |
e5338254 | 3809 | ata_tf_to_host(ap, &qc->tf); |
95064379 | 3810 | ata_queue_packet_task(ap); |
1da177e4 LT |
3811 | break; |
3812 | ||
3813 | case ATA_PROT_ATAPI_DMA: | |
c1389503 | 3814 | ap->flags |= ATA_FLAG_NOINTR; |
1da177e4 LT |
3815 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
3816 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
95064379 | 3817 | ata_queue_packet_task(ap); |
1da177e4 LT |
3818 | break; |
3819 | ||
3820 | default: | |
3821 | WARN_ON(1); | |
9a3d9eb0 | 3822 | return AC_ERR_SYSTEM; |
1da177e4 LT |
3823 | } |
3824 | ||
3825 | return 0; | |
3826 | } | |
3827 | ||
3828 | /** | |
0baab86b | 3829 | * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction |
1da177e4 LT |
3830 | * @qc: Info associated with this ATA transaction. |
3831 | * | |
3832 | * LOCKING: | |
3833 | * spin_lock_irqsave(host_set lock) | |
3834 | */ | |
3835 | ||
3836 | static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc) | |
3837 | { | |
3838 | struct ata_port *ap = qc->ap; | |
3839 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); | |
3840 | u8 dmactl; | |
3841 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
3842 | ||
3843 | /* load PRD table addr. */ | |
3844 | mb(); /* make sure PRD table writes are visible to controller */ | |
3845 | writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS); | |
3846 | ||
3847 | /* specify data direction, triple-check start bit is clear */ | |
3848 | dmactl = readb(mmio + ATA_DMA_CMD); | |
3849 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); | |
3850 | if (!rw) | |
3851 | dmactl |= ATA_DMA_WR; | |
3852 | writeb(dmactl, mmio + ATA_DMA_CMD); | |
3853 | ||
3854 | /* issue r/w command */ | |
3855 | ap->ops->exec_command(ap, &qc->tf); | |
3856 | } | |
3857 | ||
3858 | /** | |
b73fc89f | 3859 | * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction |
1da177e4 LT |
3860 | * @qc: Info associated with this ATA transaction. |
3861 | * | |
3862 | * LOCKING: | |
3863 | * spin_lock_irqsave(host_set lock) | |
3864 | */ | |
3865 | ||
3866 | static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc) | |
3867 | { | |
3868 | struct ata_port *ap = qc->ap; | |
3869 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
3870 | u8 dmactl; | |
3871 | ||
3872 | /* start host DMA transaction */ | |
3873 | dmactl = readb(mmio + ATA_DMA_CMD); | |
3874 | writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD); | |
3875 | ||
3876 | /* Strictly, one may wish to issue a readb() here, to | |
3877 | * flush the mmio write. However, control also passes | |
3878 | * to the hardware at this point, and it will interrupt | |
3879 | * us when we are to resume control. So, in effect, | |
3880 | * we don't care when the mmio write flushes. | |
3881 | * Further, a read of the DMA status register _immediately_ | |
3882 | * following the write may not be what certain flaky hardware | |
3883 | * is expected, so I think it is best to not add a readb() | |
3884 | * without first all the MMIO ATA cards/mobos. | |
3885 | * Or maybe I'm just being paranoid. | |
3886 | */ | |
3887 | } | |
3888 | ||
3889 | /** | |
3890 | * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO) | |
3891 | * @qc: Info associated with this ATA transaction. | |
3892 | * | |
3893 | * LOCKING: | |
3894 | * spin_lock_irqsave(host_set lock) | |
3895 | */ | |
3896 | ||
3897 | static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc) | |
3898 | { | |
3899 | struct ata_port *ap = qc->ap; | |
3900 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); | |
3901 | u8 dmactl; | |
3902 | ||
3903 | /* load PRD table addr. */ | |
3904 | outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); | |
3905 | ||
3906 | /* specify data direction, triple-check start bit is clear */ | |
3907 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
3908 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); | |
3909 | if (!rw) | |
3910 | dmactl |= ATA_DMA_WR; | |
3911 | outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
3912 | ||
3913 | /* issue r/w command */ | |
3914 | ap->ops->exec_command(ap, &qc->tf); | |
3915 | } | |
3916 | ||
3917 | /** | |
3918 | * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO) | |
3919 | * @qc: Info associated with this ATA transaction. | |
3920 | * | |
3921 | * LOCKING: | |
3922 | * spin_lock_irqsave(host_set lock) | |
3923 | */ | |
3924 | ||
3925 | static void ata_bmdma_start_pio (struct ata_queued_cmd *qc) | |
3926 | { | |
3927 | struct ata_port *ap = qc->ap; | |
3928 | u8 dmactl; | |
3929 | ||
3930 | /* start host DMA transaction */ | |
3931 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
3932 | outb(dmactl | ATA_DMA_START, | |
3933 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
3934 | } | |
3935 | ||
0baab86b EF |
3936 | |
3937 | /** | |
3938 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction | |
3939 | * @qc: Info associated with this ATA transaction. | |
3940 | * | |
3941 | * Writes the ATA_DMA_START flag to the DMA command register. | |
3942 | * | |
3943 | * May be used as the bmdma_start() entry in ata_port_operations. | |
3944 | * | |
3945 | * LOCKING: | |
3946 | * spin_lock_irqsave(host_set lock) | |
3947 | */ | |
1da177e4 LT |
3948 | void ata_bmdma_start(struct ata_queued_cmd *qc) |
3949 | { | |
3950 | if (qc->ap->flags & ATA_FLAG_MMIO) | |
3951 | ata_bmdma_start_mmio(qc); | |
3952 | else | |
3953 | ata_bmdma_start_pio(qc); | |
3954 | } | |
3955 | ||
0baab86b EF |
3956 | |
3957 | /** | |
3958 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction | |
3959 | * @qc: Info associated with this ATA transaction. | |
3960 | * | |
3961 | * Writes address of PRD table to device's PRD Table Address | |
3962 | * register, sets the DMA control register, and calls | |
3963 | * ops->exec_command() to start the transfer. | |
3964 | * | |
3965 | * May be used as the bmdma_setup() entry in ata_port_operations. | |
3966 | * | |
3967 | * LOCKING: | |
3968 | * spin_lock_irqsave(host_set lock) | |
3969 | */ | |
1da177e4 LT |
3970 | void ata_bmdma_setup(struct ata_queued_cmd *qc) |
3971 | { | |
3972 | if (qc->ap->flags & ATA_FLAG_MMIO) | |
3973 | ata_bmdma_setup_mmio(qc); | |
3974 | else | |
3975 | ata_bmdma_setup_pio(qc); | |
3976 | } | |
3977 | ||
0baab86b EF |
3978 | |
3979 | /** | |
3980 | * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. | |
decc6d0b | 3981 | * @ap: Port associated with this ATA transaction. |
0baab86b EF |
3982 | * |
3983 | * Clear interrupt and error flags in DMA status register. | |
3984 | * | |
3985 | * May be used as the irq_clear() entry in ata_port_operations. | |
3986 | * | |
3987 | * LOCKING: | |
3988 | * spin_lock_irqsave(host_set lock) | |
3989 | */ | |
3990 | ||
1da177e4 LT |
3991 | void ata_bmdma_irq_clear(struct ata_port *ap) |
3992 | { | |
3993 | if (ap->flags & ATA_FLAG_MMIO) { | |
3994 | void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS; | |
3995 | writeb(readb(mmio), mmio); | |
3996 | } else { | |
3997 | unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS; | |
3998 | outb(inb(addr), addr); | |
3999 | } | |
4000 | ||
4001 | } | |
4002 | ||
0baab86b EF |
4003 | |
4004 | /** | |
4005 | * ata_bmdma_status - Read PCI IDE BMDMA status | |
decc6d0b | 4006 | * @ap: Port associated with this ATA transaction. |
0baab86b EF |
4007 | * |
4008 | * Read and return BMDMA status register. | |
4009 | * | |
4010 | * May be used as the bmdma_status() entry in ata_port_operations. | |
4011 | * | |
4012 | * LOCKING: | |
4013 | * spin_lock_irqsave(host_set lock) | |
4014 | */ | |
4015 | ||
1da177e4 LT |
4016 | u8 ata_bmdma_status(struct ata_port *ap) |
4017 | { | |
4018 | u8 host_stat; | |
4019 | if (ap->flags & ATA_FLAG_MMIO) { | |
4020 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
4021 | host_stat = readb(mmio + ATA_DMA_STATUS); | |
4022 | } else | |
ee500aab | 4023 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
1da177e4 LT |
4024 | return host_stat; |
4025 | } | |
4026 | ||
0baab86b EF |
4027 | |
4028 | /** | |
4029 | * ata_bmdma_stop - Stop PCI IDE BMDMA transfer | |
b73fc89f | 4030 | * @qc: Command we are ending DMA for |
0baab86b EF |
4031 | * |
4032 | * Clears the ATA_DMA_START flag in the dma control register | |
4033 | * | |
4034 | * May be used as the bmdma_stop() entry in ata_port_operations. | |
4035 | * | |
4036 | * LOCKING: | |
4037 | * spin_lock_irqsave(host_set lock) | |
4038 | */ | |
4039 | ||
b73fc89f | 4040 | void ata_bmdma_stop(struct ata_queued_cmd *qc) |
1da177e4 | 4041 | { |
b73fc89f | 4042 | struct ata_port *ap = qc->ap; |
1da177e4 LT |
4043 | if (ap->flags & ATA_FLAG_MMIO) { |
4044 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
4045 | ||
4046 | /* clear start/stop bit */ | |
4047 | writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, | |
4048 | mmio + ATA_DMA_CMD); | |
4049 | } else { | |
4050 | /* clear start/stop bit */ | |
4051 | outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START, | |
4052 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); | |
4053 | } | |
4054 | ||
4055 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ | |
4056 | ata_altstatus(ap); /* dummy read */ | |
4057 | } | |
4058 | ||
4059 | /** | |
4060 | * ata_host_intr - Handle host interrupt for given (port, task) | |
4061 | * @ap: Port on which interrupt arrived (possibly...) | |
4062 | * @qc: Taskfile currently active in engine | |
4063 | * | |
4064 | * Handle host interrupt for given queued command. Currently, | |
4065 | * only DMA interrupts are handled. All other commands are | |
4066 | * handled via polling with interrupts disabled (nIEN bit). | |
4067 | * | |
4068 | * LOCKING: | |
4069 | * spin_lock_irqsave(host_set lock) | |
4070 | * | |
4071 | * RETURNS: | |
4072 | * One if interrupt was handled, zero if not (shared irq). | |
4073 | */ | |
4074 | ||
4075 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
4076 | struct ata_queued_cmd *qc) | |
4077 | { | |
4078 | u8 status, host_stat; | |
4079 | ||
4080 | switch (qc->tf.protocol) { | |
4081 | ||
4082 | case ATA_PROT_DMA: | |
4083 | case ATA_PROT_ATAPI_DMA: | |
4084 | case ATA_PROT_ATAPI: | |
4085 | /* check status of DMA engine */ | |
4086 | host_stat = ap->ops->bmdma_status(ap); | |
4087 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); | |
4088 | ||
4089 | /* if it's not our irq... */ | |
4090 | if (!(host_stat & ATA_DMA_INTR)) | |
4091 | goto idle_irq; | |
4092 | ||
4093 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 4094 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
4095 | |
4096 | /* fall through */ | |
4097 | ||
4098 | case ATA_PROT_ATAPI_NODATA: | |
4099 | case ATA_PROT_NODATA: | |
4100 | /* check altstatus */ | |
4101 | status = ata_altstatus(ap); | |
4102 | if (status & ATA_BUSY) | |
4103 | goto idle_irq; | |
4104 | ||
4105 | /* check main status, clearing INTRQ */ | |
4106 | status = ata_chk_status(ap); | |
4107 | if (unlikely(status & ATA_BUSY)) | |
4108 | goto idle_irq; | |
4109 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", | |
4110 | ap->id, qc->tf.protocol, status); | |
4111 | ||
4112 | /* ack bmdma irq events */ | |
4113 | ap->ops->irq_clear(ap); | |
4114 | ||
4115 | /* complete taskfile transaction */ | |
a22e2eb0 AL |
4116 | qc->err_mask |= ac_err_mask(status); |
4117 | ata_qc_complete(qc); | |
1da177e4 LT |
4118 | break; |
4119 | ||
4120 | default: | |
4121 | goto idle_irq; | |
4122 | } | |
4123 | ||
4124 | return 1; /* irq handled */ | |
4125 | ||
4126 | idle_irq: | |
4127 | ap->stats.idle_irq++; | |
4128 | ||
4129 | #ifdef ATA_IRQ_TRAP | |
4130 | if ((ap->stats.idle_irq % 1000) == 0) { | |
4131 | handled = 1; | |
4132 | ata_irq_ack(ap, 0); /* debug trap */ | |
4133 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); | |
4134 | } | |
4135 | #endif | |
4136 | return 0; /* irq not handled */ | |
4137 | } | |
4138 | ||
4139 | /** | |
4140 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b JG |
4141 | * @irq: irq line (unused) |
4142 | * @dev_instance: pointer to our ata_host_set information structure | |
1da177e4 LT |
4143 | * @regs: unused |
4144 | * | |
0cba632b JG |
4145 | * Default interrupt handler for PCI IDE devices. Calls |
4146 | * ata_host_intr() for each port that is not disabled. | |
4147 | * | |
1da177e4 | 4148 | * LOCKING: |
0cba632b | 4149 | * Obtains host_set lock during operation. |
1da177e4 LT |
4150 | * |
4151 | * RETURNS: | |
0cba632b | 4152 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
4153 | */ |
4154 | ||
4155 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) | |
4156 | { | |
4157 | struct ata_host_set *host_set = dev_instance; | |
4158 | unsigned int i; | |
4159 | unsigned int handled = 0; | |
4160 | unsigned long flags; | |
4161 | ||
4162 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
4163 | spin_lock_irqsave(&host_set->lock, flags); | |
4164 | ||
4165 | for (i = 0; i < host_set->n_ports; i++) { | |
4166 | struct ata_port *ap; | |
4167 | ||
4168 | ap = host_set->ports[i]; | |
c1389503 TH |
4169 | if (ap && |
4170 | !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { | |
1da177e4 LT |
4171 | struct ata_queued_cmd *qc; |
4172 | ||
4173 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
21b1ed74 AL |
4174 | if (qc && (!(qc->tf.ctl & ATA_NIEN)) && |
4175 | (qc->flags & ATA_QCFLAG_ACTIVE)) | |
1da177e4 LT |
4176 | handled |= ata_host_intr(ap, qc); |
4177 | } | |
4178 | } | |
4179 | ||
4180 | spin_unlock_irqrestore(&host_set->lock, flags); | |
4181 | ||
4182 | return IRQ_RETVAL(handled); | |
4183 | } | |
4184 | ||
4185 | /** | |
4186 | * atapi_packet_task - Write CDB bytes to hardware | |
4187 | * @_data: Port to which ATAPI device is attached. | |
4188 | * | |
4189 | * When device has indicated its readiness to accept | |
4190 | * a CDB, this function is called. Send the CDB. | |
4191 | * If DMA is to be performed, exit immediately. | |
4192 | * Otherwise, we are in polling mode, so poll | |
4193 | * status under operation succeeds or fails. | |
4194 | * | |
4195 | * LOCKING: | |
4196 | * Kernel thread context (may sleep) | |
4197 | */ | |
4198 | ||
4199 | static void atapi_packet_task(void *_data) | |
4200 | { | |
4201 | struct ata_port *ap = _data; | |
4202 | struct ata_queued_cmd *qc; | |
4203 | u8 status; | |
4204 | ||
4205 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
a4631474 TH |
4206 | WARN_ON(qc == NULL); |
4207 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4208 | |
4209 | /* sleep-wait for BSY to clear */ | |
4210 | DPRINTK("busy wait\n"); | |
d8fe452b | 4211 | if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) { |
11a56d24 | 4212 | qc->err_mask |= AC_ERR_TIMEOUT; |
d8fe452b AL |
4213 | goto err_out; |
4214 | } | |
1da177e4 LT |
4215 | |
4216 | /* make sure DRQ is set */ | |
4217 | status = ata_chk_status(ap); | |
d8fe452b | 4218 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) { |
11a56d24 | 4219 | qc->err_mask |= AC_ERR_HSM; |
1da177e4 | 4220 | goto err_out; |
d8fe452b | 4221 | } |
1da177e4 LT |
4222 | |
4223 | /* send SCSI cdb */ | |
4224 | DPRINTK("send cdb\n"); | |
6e7846e9 | 4225 | WARN_ON(qc->dev->cdb_len < 12); |
1da177e4 | 4226 | |
c1389503 TH |
4227 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA || |
4228 | qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { | |
4229 | unsigned long flags; | |
1da177e4 | 4230 | |
c1389503 TH |
4231 | /* Once we're done issuing command and kicking bmdma, |
4232 | * irq handler takes over. To not lose irq, we need | |
4233 | * to clear NOINTR flag before sending cdb, but | |
4234 | * interrupt handler shouldn't be invoked before we're | |
4235 | * finished. Hence, the following locking. | |
4236 | */ | |
4237 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
4238 | ap->flags &= ~ATA_FLAG_NOINTR; | |
6e7846e9 | 4239 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); |
c1389503 TH |
4240 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) |
4241 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
4242 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
4243 | } else { | |
6e7846e9 | 4244 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); |
1da177e4 | 4245 | |
c1389503 | 4246 | /* PIO commands are handled by polling */ |
14be71f4 | 4247 | ap->hsm_task_state = HSM_ST; |
95064379 | 4248 | ata_queue_pio_task(ap); |
1da177e4 LT |
4249 | } |
4250 | ||
4251 | return; | |
4252 | ||
4253 | err_out: | |
a22e2eb0 | 4254 | ata_poll_qc_complete(qc); |
1da177e4 LT |
4255 | } |
4256 | ||
0baab86b | 4257 | |
9b847548 JA |
4258 | /* |
4259 | * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, | |
4260 | * without filling any other registers | |
4261 | */ | |
4262 | static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, | |
4263 | u8 cmd) | |
4264 | { | |
4265 | struct ata_taskfile tf; | |
4266 | int err; | |
4267 | ||
4268 | ata_tf_init(ap, &tf, dev->devno); | |
4269 | ||
4270 | tf.command = cmd; | |
4271 | tf.flags |= ATA_TFLAG_DEVICE; | |
4272 | tf.protocol = ATA_PROT_NODATA; | |
4273 | ||
4274 | err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); | |
4275 | if (err) | |
4276 | printk(KERN_ERR "%s: ata command failed: %d\n", | |
4277 | __FUNCTION__, err); | |
4278 | ||
4279 | return err; | |
4280 | } | |
4281 | ||
4282 | static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) | |
4283 | { | |
4284 | u8 cmd; | |
4285 | ||
4286 | if (!ata_try_flush_cache(dev)) | |
4287 | return 0; | |
4288 | ||
4289 | if (ata_id_has_flush_ext(dev->id)) | |
4290 | cmd = ATA_CMD_FLUSH_EXT; | |
4291 | else | |
4292 | cmd = ATA_CMD_FLUSH; | |
4293 | ||
4294 | return ata_do_simple_cmd(ap, dev, cmd); | |
4295 | } | |
4296 | ||
4297 | static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) | |
4298 | { | |
4299 | return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); | |
4300 | } | |
4301 | ||
4302 | static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) | |
4303 | { | |
4304 | return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); | |
4305 | } | |
4306 | ||
4307 | /** | |
4308 | * ata_device_resume - wakeup a previously suspended devices | |
c893a3ae RD |
4309 | * @ap: port the device is connected to |
4310 | * @dev: the device to resume | |
9b847548 JA |
4311 | * |
4312 | * Kick the drive back into action, by sending it an idle immediate | |
4313 | * command and making sure its transfer mode matches between drive | |
4314 | * and host. | |
4315 | * | |
4316 | */ | |
4317 | int ata_device_resume(struct ata_port *ap, struct ata_device *dev) | |
4318 | { | |
4319 | if (ap->flags & ATA_FLAG_SUSPENDED) { | |
4320 | ap->flags &= ~ATA_FLAG_SUSPENDED; | |
4321 | ata_set_mode(ap); | |
4322 | } | |
4323 | if (!ata_dev_present(dev)) | |
4324 | return 0; | |
4325 | if (dev->class == ATA_DEV_ATA) | |
4326 | ata_start_drive(ap, dev); | |
4327 | ||
4328 | return 0; | |
4329 | } | |
4330 | ||
4331 | /** | |
4332 | * ata_device_suspend - prepare a device for suspend | |
c893a3ae RD |
4333 | * @ap: port the device is connected to |
4334 | * @dev: the device to suspend | |
9b847548 JA |
4335 | * |
4336 | * Flush the cache on the drive, if appropriate, then issue a | |
4337 | * standbynow command. | |
9b847548 JA |
4338 | */ |
4339 | int ata_device_suspend(struct ata_port *ap, struct ata_device *dev) | |
4340 | { | |
4341 | if (!ata_dev_present(dev)) | |
4342 | return 0; | |
4343 | if (dev->class == ATA_DEV_ATA) | |
4344 | ata_flush_cache(ap, dev); | |
4345 | ||
4346 | ata_standby_drive(ap, dev); | |
4347 | ap->flags |= ATA_FLAG_SUSPENDED; | |
4348 | return 0; | |
4349 | } | |
4350 | ||
c893a3ae RD |
4351 | /** |
4352 | * ata_port_start - Set port up for dma. | |
4353 | * @ap: Port to initialize | |
4354 | * | |
4355 | * Called just after data structures for each port are | |
4356 | * initialized. Allocates space for PRD table. | |
4357 | * | |
4358 | * May be used as the port_start() entry in ata_port_operations. | |
4359 | * | |
4360 | * LOCKING: | |
4361 | * Inherited from caller. | |
4362 | */ | |
4363 | ||
1da177e4 LT |
4364 | int ata_port_start (struct ata_port *ap) |
4365 | { | |
4366 | struct device *dev = ap->host_set->dev; | |
6037d6bb | 4367 | int rc; |
1da177e4 LT |
4368 | |
4369 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); | |
4370 | if (!ap->prd) | |
4371 | return -ENOMEM; | |
4372 | ||
6037d6bb JG |
4373 | rc = ata_pad_alloc(ap, dev); |
4374 | if (rc) { | |
cedc9a47 | 4375 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
6037d6bb | 4376 | return rc; |
cedc9a47 JG |
4377 | } |
4378 | ||
1da177e4 LT |
4379 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
4380 | ||
4381 | return 0; | |
4382 | } | |
4383 | ||
0baab86b EF |
4384 | |
4385 | /** | |
4386 | * ata_port_stop - Undo ata_port_start() | |
4387 | * @ap: Port to shut down | |
4388 | * | |
4389 | * Frees the PRD table. | |
4390 | * | |
4391 | * May be used as the port_stop() entry in ata_port_operations. | |
4392 | * | |
4393 | * LOCKING: | |
6f0ef4fa | 4394 | * Inherited from caller. |
0baab86b EF |
4395 | */ |
4396 | ||
1da177e4 LT |
4397 | void ata_port_stop (struct ata_port *ap) |
4398 | { | |
4399 | struct device *dev = ap->host_set->dev; | |
4400 | ||
4401 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); | |
6037d6bb | 4402 | ata_pad_free(ap, dev); |
1da177e4 LT |
4403 | } |
4404 | ||
aa8f0dc6 JG |
4405 | void ata_host_stop (struct ata_host_set *host_set) |
4406 | { | |
4407 | if (host_set->mmio_base) | |
4408 | iounmap(host_set->mmio_base); | |
4409 | } | |
4410 | ||
4411 | ||
1da177e4 LT |
4412 | /** |
4413 | * ata_host_remove - Unregister SCSI host structure with upper layers | |
4414 | * @ap: Port to unregister | |
4415 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port | |
4416 | * | |
4417 | * LOCKING: | |
6f0ef4fa | 4418 | * Inherited from caller. |
1da177e4 LT |
4419 | */ |
4420 | ||
4421 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) | |
4422 | { | |
4423 | struct Scsi_Host *sh = ap->host; | |
4424 | ||
4425 | DPRINTK("ENTER\n"); | |
4426 | ||
4427 | if (do_unregister) | |
4428 | scsi_remove_host(sh); | |
4429 | ||
4430 | ap->ops->port_stop(ap); | |
4431 | } | |
4432 | ||
4433 | /** | |
4434 | * ata_host_init - Initialize an ata_port structure | |
4435 | * @ap: Structure to initialize | |
4436 | * @host: associated SCSI mid-layer structure | |
4437 | * @host_set: Collection of hosts to which @ap belongs | |
4438 | * @ent: Probe information provided by low-level driver | |
4439 | * @port_no: Port number associated with this ata_port | |
4440 | * | |
0cba632b JG |
4441 | * Initialize a new ata_port structure, and its associated |
4442 | * scsi_host. | |
4443 | * | |
1da177e4 | 4444 | * LOCKING: |
0cba632b | 4445 | * Inherited from caller. |
1da177e4 LT |
4446 | */ |
4447 | ||
4448 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, | |
4449 | struct ata_host_set *host_set, | |
057ace5e | 4450 | const struct ata_probe_ent *ent, unsigned int port_no) |
1da177e4 LT |
4451 | { |
4452 | unsigned int i; | |
4453 | ||
4454 | host->max_id = 16; | |
4455 | host->max_lun = 1; | |
4456 | host->max_channel = 1; | |
4457 | host->unique_id = ata_unique_id++; | |
4458 | host->max_cmd_len = 12; | |
12413197 | 4459 | |
1da177e4 LT |
4460 | ap->flags = ATA_FLAG_PORT_DISABLED; |
4461 | ap->id = host->unique_id; | |
4462 | ap->host = host; | |
4463 | ap->ctl = ATA_DEVCTL_OBS; | |
4464 | ap->host_set = host_set; | |
4465 | ap->port_no = port_no; | |
4466 | ap->hard_port_no = | |
4467 | ent->legacy_mode ? ent->hard_port_no : port_no; | |
4468 | ap->pio_mask = ent->pio_mask; | |
4469 | ap->mwdma_mask = ent->mwdma_mask; | |
4470 | ap->udma_mask = ent->udma_mask; | |
4471 | ap->flags |= ent->host_flags; | |
4472 | ap->ops = ent->port_ops; | |
4473 | ap->cbl = ATA_CBL_NONE; | |
4474 | ap->active_tag = ATA_TAG_POISON; | |
4475 | ap->last_ctl = 0xFF; | |
4476 | ||
4477 | INIT_WORK(&ap->packet_task, atapi_packet_task, ap); | |
4478 | INIT_WORK(&ap->pio_task, ata_pio_task, ap); | |
a72ec4ce | 4479 | INIT_LIST_HEAD(&ap->eh_done_q); |
1da177e4 LT |
4480 | |
4481 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
4482 | ap->device[i].devno = i; | |
4483 | ||
4484 | #ifdef ATA_IRQ_TRAP | |
4485 | ap->stats.unhandled_irq = 1; | |
4486 | ap->stats.idle_irq = 1; | |
4487 | #endif | |
4488 | ||
4489 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); | |
4490 | } | |
4491 | ||
4492 | /** | |
4493 | * ata_host_add - Attach low-level ATA driver to system | |
4494 | * @ent: Information provided by low-level driver | |
4495 | * @host_set: Collections of ports to which we add | |
4496 | * @port_no: Port number associated with this host | |
4497 | * | |
0cba632b JG |
4498 | * Attach low-level ATA driver to system. |
4499 | * | |
1da177e4 | 4500 | * LOCKING: |
0cba632b | 4501 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4502 | * |
4503 | * RETURNS: | |
0cba632b | 4504 | * New ata_port on success, for NULL on error. |
1da177e4 LT |
4505 | */ |
4506 | ||
057ace5e | 4507 | static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, |
1da177e4 LT |
4508 | struct ata_host_set *host_set, |
4509 | unsigned int port_no) | |
4510 | { | |
4511 | struct Scsi_Host *host; | |
4512 | struct ata_port *ap; | |
4513 | int rc; | |
4514 | ||
4515 | DPRINTK("ENTER\n"); | |
4516 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); | |
4517 | if (!host) | |
4518 | return NULL; | |
4519 | ||
4520 | ap = (struct ata_port *) &host->hostdata[0]; | |
4521 | ||
4522 | ata_host_init(ap, host, host_set, ent, port_no); | |
4523 | ||
4524 | rc = ap->ops->port_start(ap); | |
4525 | if (rc) | |
4526 | goto err_out; | |
4527 | ||
4528 | return ap; | |
4529 | ||
4530 | err_out: | |
4531 | scsi_host_put(host); | |
4532 | return NULL; | |
4533 | } | |
4534 | ||
4535 | /** | |
0cba632b JG |
4536 | * ata_device_add - Register hardware device with ATA and SCSI layers |
4537 | * @ent: Probe information describing hardware device to be registered | |
4538 | * | |
4539 | * This function processes the information provided in the probe | |
4540 | * information struct @ent, allocates the necessary ATA and SCSI | |
4541 | * host information structures, initializes them, and registers | |
4542 | * everything with requisite kernel subsystems. | |
4543 | * | |
4544 | * This function requests irqs, probes the ATA bus, and probes | |
4545 | * the SCSI bus. | |
1da177e4 LT |
4546 | * |
4547 | * LOCKING: | |
0cba632b | 4548 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4549 | * |
4550 | * RETURNS: | |
0cba632b | 4551 | * Number of ports registered. Zero on error (no ports registered). |
1da177e4 LT |
4552 | */ |
4553 | ||
057ace5e | 4554 | int ata_device_add(const struct ata_probe_ent *ent) |
1da177e4 LT |
4555 | { |
4556 | unsigned int count = 0, i; | |
4557 | struct device *dev = ent->dev; | |
4558 | struct ata_host_set *host_set; | |
4559 | ||
4560 | DPRINTK("ENTER\n"); | |
4561 | /* alloc a container for our list of ATA ports (buses) */ | |
57f3bda8 | 4562 | host_set = kzalloc(sizeof(struct ata_host_set) + |
1da177e4 LT |
4563 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
4564 | if (!host_set) | |
4565 | return 0; | |
1da177e4 LT |
4566 | spin_lock_init(&host_set->lock); |
4567 | ||
4568 | host_set->dev = dev; | |
4569 | host_set->n_ports = ent->n_ports; | |
4570 | host_set->irq = ent->irq; | |
4571 | host_set->mmio_base = ent->mmio_base; | |
4572 | host_set->private_data = ent->private_data; | |
4573 | host_set->ops = ent->port_ops; | |
4574 | ||
4575 | /* register each port bound to this device */ | |
4576 | for (i = 0; i < ent->n_ports; i++) { | |
4577 | struct ata_port *ap; | |
4578 | unsigned long xfer_mode_mask; | |
4579 | ||
4580 | ap = ata_host_add(ent, host_set, i); | |
4581 | if (!ap) | |
4582 | goto err_out; | |
4583 | ||
4584 | host_set->ports[i] = ap; | |
4585 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | | |
4586 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | | |
4587 | (ap->pio_mask << ATA_SHIFT_PIO); | |
4588 | ||
4589 | /* print per-port info to dmesg */ | |
4590 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " | |
4591 | "bmdma 0x%lX irq %lu\n", | |
4592 | ap->id, | |
4593 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', | |
4594 | ata_mode_string(xfer_mode_mask), | |
4595 | ap->ioaddr.cmd_addr, | |
4596 | ap->ioaddr.ctl_addr, | |
4597 | ap->ioaddr.bmdma_addr, | |
4598 | ent->irq); | |
4599 | ||
4600 | ata_chk_status(ap); | |
4601 | host_set->ops->irq_clear(ap); | |
4602 | count++; | |
4603 | } | |
4604 | ||
57f3bda8 RD |
4605 | if (!count) |
4606 | goto err_free_ret; | |
1da177e4 LT |
4607 | |
4608 | /* obtain irq, that is shared between channels */ | |
4609 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, | |
4610 | DRV_NAME, host_set)) | |
4611 | goto err_out; | |
4612 | ||
4613 | /* perform each probe synchronously */ | |
4614 | DPRINTK("probe begin\n"); | |
4615 | for (i = 0; i < count; i++) { | |
4616 | struct ata_port *ap; | |
4617 | int rc; | |
4618 | ||
4619 | ap = host_set->ports[i]; | |
4620 | ||
c893a3ae | 4621 | DPRINTK("ata%u: bus probe begin\n", ap->id); |
1da177e4 | 4622 | rc = ata_bus_probe(ap); |
c893a3ae | 4623 | DPRINTK("ata%u: bus probe end\n", ap->id); |
1da177e4 LT |
4624 | |
4625 | if (rc) { | |
4626 | /* FIXME: do something useful here? | |
4627 | * Current libata behavior will | |
4628 | * tear down everything when | |
4629 | * the module is removed | |
4630 | * or the h/w is unplugged. | |
4631 | */ | |
4632 | } | |
4633 | ||
4634 | rc = scsi_add_host(ap->host, dev); | |
4635 | if (rc) { | |
4636 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", | |
4637 | ap->id); | |
4638 | /* FIXME: do something useful here */ | |
4639 | /* FIXME: handle unconditional calls to | |
4640 | * scsi_scan_host and ata_host_remove, below, | |
4641 | * at the very least | |
4642 | */ | |
4643 | } | |
4644 | } | |
4645 | ||
4646 | /* probes are done, now scan each port's disk(s) */ | |
c893a3ae | 4647 | DPRINTK("host probe begin\n"); |
1da177e4 LT |
4648 | for (i = 0; i < count; i++) { |
4649 | struct ata_port *ap = host_set->ports[i]; | |
4650 | ||
644dd0cc | 4651 | ata_scsi_scan_host(ap); |
1da177e4 LT |
4652 | } |
4653 | ||
4654 | dev_set_drvdata(dev, host_set); | |
4655 | ||
4656 | VPRINTK("EXIT, returning %u\n", ent->n_ports); | |
4657 | return ent->n_ports; /* success */ | |
4658 | ||
4659 | err_out: | |
4660 | for (i = 0; i < count; i++) { | |
4661 | ata_host_remove(host_set->ports[i], 1); | |
4662 | scsi_host_put(host_set->ports[i]->host); | |
4663 | } | |
57f3bda8 | 4664 | err_free_ret: |
1da177e4 LT |
4665 | kfree(host_set); |
4666 | VPRINTK("EXIT, returning 0\n"); | |
4667 | return 0; | |
4668 | } | |
4669 | ||
17b14451 AC |
4670 | /** |
4671 | * ata_host_set_remove - PCI layer callback for device removal | |
4672 | * @host_set: ATA host set that was removed | |
4673 | * | |
4674 | * Unregister all objects associated with this host set. Free those | |
4675 | * objects. | |
4676 | * | |
4677 | * LOCKING: | |
4678 | * Inherited from calling layer (may sleep). | |
4679 | */ | |
4680 | ||
17b14451 AC |
4681 | void ata_host_set_remove(struct ata_host_set *host_set) |
4682 | { | |
4683 | struct ata_port *ap; | |
4684 | unsigned int i; | |
4685 | ||
4686 | for (i = 0; i < host_set->n_ports; i++) { | |
4687 | ap = host_set->ports[i]; | |
4688 | scsi_remove_host(ap->host); | |
4689 | } | |
4690 | ||
4691 | free_irq(host_set->irq, host_set); | |
4692 | ||
4693 | for (i = 0; i < host_set->n_ports; i++) { | |
4694 | ap = host_set->ports[i]; | |
4695 | ||
4696 | ata_scsi_release(ap->host); | |
4697 | ||
4698 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { | |
4699 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
4700 | ||
4701 | if (ioaddr->cmd_addr == 0x1f0) | |
4702 | release_region(0x1f0, 8); | |
4703 | else if (ioaddr->cmd_addr == 0x170) | |
4704 | release_region(0x170, 8); | |
4705 | } | |
4706 | ||
4707 | scsi_host_put(ap->host); | |
4708 | } | |
4709 | ||
4710 | if (host_set->ops->host_stop) | |
4711 | host_set->ops->host_stop(host_set); | |
4712 | ||
4713 | kfree(host_set); | |
4714 | } | |
4715 | ||
1da177e4 LT |
4716 | /** |
4717 | * ata_scsi_release - SCSI layer callback hook for host unload | |
4718 | * @host: libata host to be unloaded | |
4719 | * | |
4720 | * Performs all duties necessary to shut down a libata port... | |
4721 | * Kill port kthread, disable port, and release resources. | |
4722 | * | |
4723 | * LOCKING: | |
4724 | * Inherited from SCSI layer. | |
4725 | * | |
4726 | * RETURNS: | |
4727 | * One. | |
4728 | */ | |
4729 | ||
4730 | int ata_scsi_release(struct Scsi_Host *host) | |
4731 | { | |
4732 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; | |
d9572b1d | 4733 | int i; |
1da177e4 LT |
4734 | |
4735 | DPRINTK("ENTER\n"); | |
4736 | ||
4737 | ap->ops->port_disable(ap); | |
4738 | ata_host_remove(ap, 0); | |
d9572b1d TH |
4739 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
4740 | kfree(ap->device[i].id); | |
1da177e4 LT |
4741 | |
4742 | DPRINTK("EXIT\n"); | |
4743 | return 1; | |
4744 | } | |
4745 | ||
4746 | /** | |
4747 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
4748 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
4749 | * |
4750 | * Utility function which initializes data_addr, error_addr, | |
4751 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
4752 | * device_addr, status_addr, and command_addr to standard offsets | |
4753 | * relative to cmd_addr. | |
4754 | * | |
4755 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 4756 | */ |
0baab86b | 4757 | |
1da177e4 LT |
4758 | void ata_std_ports(struct ata_ioports *ioaddr) |
4759 | { | |
4760 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
4761 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
4762 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
4763 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
4764 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
4765 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
4766 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
4767 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
4768 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
4769 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
4770 | } | |
4771 | ||
0baab86b | 4772 | |
374b1873 JG |
4773 | #ifdef CONFIG_PCI |
4774 | ||
4775 | void ata_pci_host_stop (struct ata_host_set *host_set) | |
4776 | { | |
4777 | struct pci_dev *pdev = to_pci_dev(host_set->dev); | |
4778 | ||
4779 | pci_iounmap(pdev, host_set->mmio_base); | |
4780 | } | |
4781 | ||
1da177e4 LT |
4782 | /** |
4783 | * ata_pci_remove_one - PCI layer callback for device removal | |
4784 | * @pdev: PCI device that was removed | |
4785 | * | |
4786 | * PCI layer indicates to libata via this hook that | |
6f0ef4fa | 4787 | * hot-unplug or module unload event has occurred. |
1da177e4 LT |
4788 | * Handle this by unregistering all objects associated |
4789 | * with this PCI device. Free those objects. Then finally | |
4790 | * release PCI resources and disable device. | |
4791 | * | |
4792 | * LOCKING: | |
4793 | * Inherited from PCI layer (may sleep). | |
4794 | */ | |
4795 | ||
4796 | void ata_pci_remove_one (struct pci_dev *pdev) | |
4797 | { | |
4798 | struct device *dev = pci_dev_to_dev(pdev); | |
4799 | struct ata_host_set *host_set = dev_get_drvdata(dev); | |
1da177e4 | 4800 | |
17b14451 | 4801 | ata_host_set_remove(host_set); |
1da177e4 LT |
4802 | pci_release_regions(pdev); |
4803 | pci_disable_device(pdev); | |
4804 | dev_set_drvdata(dev, NULL); | |
4805 | } | |
4806 | ||
4807 | /* move to PCI subsystem */ | |
057ace5e | 4808 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
4809 | { |
4810 | unsigned long tmp = 0; | |
4811 | ||
4812 | switch (bits->width) { | |
4813 | case 1: { | |
4814 | u8 tmp8 = 0; | |
4815 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
4816 | tmp = tmp8; | |
4817 | break; | |
4818 | } | |
4819 | case 2: { | |
4820 | u16 tmp16 = 0; | |
4821 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
4822 | tmp = tmp16; | |
4823 | break; | |
4824 | } | |
4825 | case 4: { | |
4826 | u32 tmp32 = 0; | |
4827 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
4828 | tmp = tmp32; | |
4829 | break; | |
4830 | } | |
4831 | ||
4832 | default: | |
4833 | return -EINVAL; | |
4834 | } | |
4835 | ||
4836 | tmp &= bits->mask; | |
4837 | ||
4838 | return (tmp == bits->val) ? 1 : 0; | |
4839 | } | |
9b847548 JA |
4840 | |
4841 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) | |
4842 | { | |
4843 | pci_save_state(pdev); | |
4844 | pci_disable_device(pdev); | |
4845 | pci_set_power_state(pdev, PCI_D3hot); | |
4846 | return 0; | |
4847 | } | |
4848 | ||
4849 | int ata_pci_device_resume(struct pci_dev *pdev) | |
4850 | { | |
4851 | pci_set_power_state(pdev, PCI_D0); | |
4852 | pci_restore_state(pdev); | |
4853 | pci_enable_device(pdev); | |
4854 | pci_set_master(pdev); | |
4855 | return 0; | |
4856 | } | |
1da177e4 LT |
4857 | #endif /* CONFIG_PCI */ |
4858 | ||
4859 | ||
1da177e4 LT |
4860 | static int __init ata_init(void) |
4861 | { | |
4862 | ata_wq = create_workqueue("ata"); | |
4863 | if (!ata_wq) | |
4864 | return -ENOMEM; | |
4865 | ||
4866 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); | |
4867 | return 0; | |
4868 | } | |
4869 | ||
4870 | static void __exit ata_exit(void) | |
4871 | { | |
4872 | destroy_workqueue(ata_wq); | |
4873 | } | |
4874 | ||
4875 | module_init(ata_init); | |
4876 | module_exit(ata_exit); | |
4877 | ||
67846b30 JG |
4878 | static unsigned long ratelimit_time; |
4879 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; | |
4880 | ||
4881 | int ata_ratelimit(void) | |
4882 | { | |
4883 | int rc; | |
4884 | unsigned long flags; | |
4885 | ||
4886 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
4887 | ||
4888 | if (time_after(jiffies, ratelimit_time)) { | |
4889 | rc = 1; | |
4890 | ratelimit_time = jiffies + (HZ/5); | |
4891 | } else | |
4892 | rc = 0; | |
4893 | ||
4894 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
4895 | ||
4896 | return rc; | |
4897 | } | |
4898 | ||
1da177e4 LT |
4899 | /* |
4900 | * libata is essentially a library of internal helper functions for | |
4901 | * low-level ATA host controller drivers. As such, the API/ABI is | |
4902 | * likely to change as new drivers are added and updated. | |
4903 | * Do not depend on ABI/API stability. | |
4904 | */ | |
4905 | ||
4906 | EXPORT_SYMBOL_GPL(ata_std_bios_param); | |
4907 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
4908 | EXPORT_SYMBOL_GPL(ata_device_add); | |
17b14451 | 4909 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
1da177e4 LT |
4910 | EXPORT_SYMBOL_GPL(ata_sg_init); |
4911 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
76014427 | 4912 | EXPORT_SYMBOL_GPL(__ata_qc_complete); |
1da177e4 LT |
4913 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
4914 | EXPORT_SYMBOL_GPL(ata_eng_timeout); | |
4915 | EXPORT_SYMBOL_GPL(ata_tf_load); | |
4916 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
4917 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
4918 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
4919 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); | |
4920 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
4921 | EXPORT_SYMBOL_GPL(ata_check_status); | |
4922 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
4923 | EXPORT_SYMBOL_GPL(ata_exec_command); |
4924 | EXPORT_SYMBOL_GPL(ata_port_start); | |
4925 | EXPORT_SYMBOL_GPL(ata_port_stop); | |
aa8f0dc6 | 4926 | EXPORT_SYMBOL_GPL(ata_host_stop); |
1da177e4 LT |
4927 | EXPORT_SYMBOL_GPL(ata_interrupt); |
4928 | EXPORT_SYMBOL_GPL(ata_qc_prep); | |
4929 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); | |
4930 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
4931 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
4932 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
4933 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
4934 | EXPORT_SYMBOL_GPL(ata_port_probe); | |
4935 | EXPORT_SYMBOL_GPL(sata_phy_reset); | |
4936 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
4937 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
8a19ac89 | 4938 | EXPORT_SYMBOL_GPL(ata_std_probeinit); |
c2bd5804 TH |
4939 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
4940 | EXPORT_SYMBOL_GPL(sata_std_hardreset); | |
4941 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
4942 | EXPORT_SYMBOL_GPL(ata_std_probe_reset); | |
a62c0fc5 | 4943 | EXPORT_SYMBOL_GPL(ata_drive_probe_reset); |
1da177e4 | 4944 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 4945 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
6f8b9958 | 4946 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
1da177e4 LT |
4947 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
4948 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
f29841e0 | 4949 | EXPORT_SYMBOL_GPL(ata_scsi_timed_out); |
1da177e4 LT |
4950 | EXPORT_SYMBOL_GPL(ata_scsi_error); |
4951 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); | |
4952 | EXPORT_SYMBOL_GPL(ata_scsi_release); | |
4953 | EXPORT_SYMBOL_GPL(ata_host_intr); | |
4954 | EXPORT_SYMBOL_GPL(ata_dev_classify); | |
6a62a04d TH |
4955 | EXPORT_SYMBOL_GPL(ata_id_string); |
4956 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 | 4957 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
a72ec4ce TH |
4958 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
4959 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
1da177e4 | 4960 | |
1bc4ccff | 4961 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
4962 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
4963 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
4964 | ||
1da177e4 LT |
4965 | #ifdef CONFIG_PCI |
4966 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
374b1873 | 4967 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
1da177e4 LT |
4968 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
4969 | EXPORT_SYMBOL_GPL(ata_pci_init_one); | |
4970 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
9b847548 JA |
4971 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
4972 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
1da177e4 | 4973 | #endif /* CONFIG_PCI */ |
9b847548 JA |
4974 | |
4975 | EXPORT_SYMBOL_GPL(ata_device_suspend); | |
4976 | EXPORT_SYMBOL_GPL(ata_device_resume); | |
4977 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); | |
4978 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); |