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Commit | Line | Data |
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1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
3 | * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * Mostly written by Mark Lord <mlord@pobox.com> | |
8 | * and Gadi Oxman <gadio@netvision.net.il> | |
9 | * and Andre Hedrick <andre@linux-ide.org> | |
10 | * | |
11 | * See linux/MAINTAINERS for address of current maintainer. | |
12 | * | |
13 | * This is the IDE probe module, as evolved from hd.c and ide.c. | |
14 | * | |
bbe4d6d8 BZ |
15 | * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
16 | * by Andrea Arcangeli | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/genhd.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ide.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/kmod.h> | |
34 | #include <linux/pci.h> | |
dc81785d | 35 | #include <linux/scatterlist.h> |
1da177e4 LT |
36 | |
37 | #include <asm/byteorder.h> | |
38 | #include <asm/irq.h> | |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
1da177e4 LT |
40 | #include <asm/io.h> |
41 | ||
42 | /** | |
43 | * generic_id - add a generic drive id | |
44 | * @drive: drive to make an ID block for | |
45 | * | |
46 | * Add a fake id field to the drive we are passed. This allows | |
47 | * use to skip a ton of NULL checks (which people always miss) | |
48 | * and make drive properties unconditional outside of this file | |
49 | */ | |
50 | ||
51 | static void generic_id(ide_drive_t *drive) | |
52 | { | |
4dde4492 BZ |
53 | u16 *id = drive->id; |
54 | ||
55 | id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; | |
56 | id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; | |
57 | id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; | |
1da177e4 LT |
58 | } |
59 | ||
60 | static void ide_disk_init_chs(ide_drive_t *drive) | |
61 | { | |
4dde4492 | 62 | u16 *id = drive->id; |
1da177e4 LT |
63 | |
64 | /* Extract geometry if we did not already have one for the drive */ | |
65 | if (!drive->cyl || !drive->head || !drive->sect) { | |
4dde4492 BZ |
66 | drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; |
67 | drive->head = drive->bios_head = id[ATA_ID_HEADS]; | |
68 | drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
69 | } |
70 | ||
71 | /* Handle logical geometry translation by the drive */ | |
dd8f46f6 | 72 | if (ata_id_current_chs_valid(id)) { |
4dde4492 BZ |
73 | drive->cyl = id[ATA_ID_CUR_CYLS]; |
74 | drive->head = id[ATA_ID_CUR_HEADS]; | |
75 | drive->sect = id[ATA_ID_CUR_SECTORS]; | |
1da177e4 LT |
76 | } |
77 | ||
78 | /* Use physical geometry if what we have still makes no sense */ | |
4dde4492 BZ |
79 | if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { |
80 | drive->cyl = id[ATA_ID_CYLS]; | |
81 | drive->head = id[ATA_ID_HEADS]; | |
82 | drive->sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
83 | } |
84 | } | |
85 | ||
86 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
87 | { | |
48fb2688 BZ |
88 | u16 *id = drive->id; |
89 | u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; | |
1da177e4 | 90 | |
48fb2688 | 91 | if (max_multsect) { |
48fb2688 BZ |
92 | if ((max_multsect / 2) > 1) |
93 | id[ATA_ID_MULTSECT] = max_multsect | 0x100; | |
94 | else | |
95 | id[ATA_ID_MULTSECT] &= ~0x1ff; | |
96 | ||
97 | drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; | |
7c51c17e BZ |
98 | |
99 | if (drive->mult_req) | |
ca1b96e0 | 100 | drive->special_flags |= IDE_SFLAG_SET_MULTMODE; |
1da177e4 LT |
101 | } |
102 | } | |
103 | ||
24630dc6 BZ |
104 | static void ide_classify_ata_dev(ide_drive_t *drive) |
105 | { | |
106 | u16 *id = drive->id; | |
107 | char *m = (char *)&id[ATA_ID_PROD]; | |
108 | int is_cfa = ata_id_is_cfa(id); | |
109 | ||
110 | /* CF devices are *not* removable in Linux definition of the term */ | |
111 | if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) | |
112 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
113 | ||
114 | drive->media = ide_disk; | |
115 | ||
116 | if (!ata_id_has_unload(drive->id)) | |
117 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
118 | ||
119 | printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, | |
120 | is_cfa ? "CFA" : "ATA"); | |
121 | } | |
122 | ||
123 | static void ide_classify_atapi_dev(ide_drive_t *drive) | |
124 | { | |
125 | u16 *id = drive->id; | |
126 | char *m = (char *)&id[ATA_ID_PROD]; | |
127 | u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; | |
128 | ||
129 | printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); | |
130 | switch (type) { | |
131 | case ide_floppy: | |
132 | if (!strstr(m, "CD-ROM")) { | |
133 | if (!strstr(m, "oppy") && | |
134 | !strstr(m, "poyp") && | |
135 | !strstr(m, "ZIP")) | |
136 | printk(KERN_CONT "cdrom or floppy?, assuming "); | |
137 | if (drive->media != ide_cdrom) { | |
138 | printk(KERN_CONT "FLOPPY"); | |
139 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
140 | break; | |
141 | } | |
142 | } | |
143 | /* Early cdrom models used zero */ | |
144 | type = ide_cdrom; | |
a2eed33d | 145 | /* fall through */ |
24630dc6 BZ |
146 | case ide_cdrom: |
147 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
148 | #ifdef CONFIG_PPC | |
149 | /* kludge for Apple PowerBook internal zip */ | |
150 | if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { | |
151 | printk(KERN_CONT "FLOPPY"); | |
152 | type = ide_floppy; | |
153 | break; | |
154 | } | |
155 | #endif | |
156 | printk(KERN_CONT "CD/DVD-ROM"); | |
157 | break; | |
158 | case ide_tape: | |
159 | printk(KERN_CONT "TAPE"); | |
160 | break; | |
161 | case ide_optical: | |
162 | printk(KERN_CONT "OPTICAL"); | |
163 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
164 | break; | |
165 | default: | |
166 | printk(KERN_CONT "UNKNOWN (type %d)", type); | |
167 | break; | |
168 | } | |
169 | ||
170 | printk(KERN_CONT " drive\n"); | |
171 | drive->media = type; | |
172 | /* an ATAPI device ignores DRDY */ | |
173 | drive->ready_stat = 0; | |
174 | if (ata_id_cdb_intr(id)) | |
175 | drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; | |
176 | drive->dev_flags |= IDE_DFLAG_DOORLOCKING; | |
177 | /* we don't do head unloading on ATAPI devices */ | |
178 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
179 | } | |
180 | ||
1da177e4 LT |
181 | /** |
182 | * do_identify - identify a drive | |
183 | * @drive: drive to identify | |
184 | * @cmd: command used | |
2ebe1d9e | 185 | * @id: buffer for IDENTIFY data |
1da177e4 LT |
186 | * |
187 | * Called when we have issued a drive identify command to | |
188 | * read and parse the results. This function is run with | |
189 | * interrupts disabled. | |
190 | */ | |
047140ae | 191 | |
2ebe1d9e | 192 | static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) |
1da177e4 | 193 | { |
898ec223 | 194 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 195 | char *m = (char *)&id[ATA_ID_PROD]; |
94b9efdf | 196 | unsigned long flags; |
24630dc6 | 197 | int bswap = 1; |
1da177e4 | 198 | |
94b9efdf BZ |
199 | /* local CPU only; some systems need this */ |
200 | local_irq_save(flags); | |
1da177e4 | 201 | /* read 512 bytes of id info */ |
374e042c | 202 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
94b9efdf | 203 | local_irq_restore(flags); |
1da177e4 | 204 | |
97100fc8 | 205 | drive->dev_flags |= IDE_DFLAG_ID_READ; |
7b9f25b5 BZ |
206 | #ifdef DEBUG |
207 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
208 | ide_dump_identify((u8 *)id); | |
209 | #endif | |
1da177e4 LT |
210 | ide_fix_driveid(id); |
211 | ||
1da177e4 | 212 | /* |
aaaade3f BZ |
213 | * ATA_CMD_ID_ATA returns little-endian info, |
214 | * ATA_CMD_ID_ATAPI *usually* returns little-endian info. | |
1da177e4 | 215 | */ |
aaaade3f | 216 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 BZ |
217 | if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
218 | (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ | |
219 | (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ | |
1da177e4 | 220 | /* Vertos drives may still be weird */ |
4dde4492 | 221 | bswap ^= 1; |
1da177e4 | 222 | } |
4dde4492 BZ |
223 | |
224 | ide_fixstring(m, ATA_ID_PROD_LEN, bswap); | |
225 | ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); | |
226 | ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); | |
1da177e4 | 227 | |
699b052a | 228 | /* we depend on this a lot! */ |
4dde4492 | 229 | m[ATA_ID_PROD_LEN - 1] = '\0'; |
699b052a | 230 | |
4dde4492 | 231 | if (strstr(m, "E X A B Y T E N E S T")) |
69197ad7 BZ |
232 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
233 | else | |
234 | drive->dev_flags |= IDE_DFLAG_PRESENT; | |
1da177e4 LT |
235 | } |
236 | ||
237 | /** | |
2ebe1d9e | 238 | * ide_dev_read_id - send ATA/ATAPI IDENTIFY command |
1da177e4 LT |
239 | * @drive: drive to identify |
240 | * @cmd: command to use | |
2ebe1d9e | 241 | * @id: buffer for IDENTIFY data |
fa56d4cb | 242 | * @irq_ctx: flag set when called from the IRQ context |
1da177e4 | 243 | * |
2ebe1d9e | 244 | * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. |
1da177e4 LT |
245 | * |
246 | * Returns: 0 device was identified | |
247 | * 1 device timed-out (no response to identify request) | |
248 | * 2 device aborted the command (refused to identify itself) | |
249 | */ | |
250 | ||
fa56d4cb | 251 | int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx) |
1da177e4 | 252 | { |
898ec223 | 253 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 | 254 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 255 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 256 | int use_altstatus = 0, rc; |
1da177e4 LT |
257 | unsigned long timeout; |
258 | u8 s = 0, a = 0; | |
259 | ||
a182807a BZ |
260 | /* |
261 | * Disable device IRQ. Otherwise we'll get spurious interrupts | |
262 | * during the identify phase that the IRQ handler isn't expecting. | |
263 | */ | |
264 | if (io_ports->ctl_addr) | |
ecf3a31d | 265 | tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); |
a182807a | 266 | |
1da177e4 | 267 | /* take a deep breath */ |
fa56d4cb BZ |
268 | if (irq_ctx) |
269 | mdelay(50); | |
270 | else | |
271 | msleep(50); | |
1da177e4 | 272 | |
6636487e BZ |
273 | if (io_ports->ctl_addr && |
274 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { | |
374e042c BZ |
275 | a = tp_ops->read_altstatus(hwif); |
276 | s = tp_ops->read_status(hwif); | |
27f00e53 | 277 | if ((a ^ s) & ~ATA_SENSE) |
1da177e4 | 278 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
279 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
280 | "instead of ALTSTATUS(0x%02x)\n", | |
281 | drive->name, s, a); | |
282 | else | |
1da177e4 | 283 | /* use non-intrusive polling */ |
c47137a9 BZ |
284 | use_altstatus = 1; |
285 | } | |
1da177e4 LT |
286 | |
287 | /* set features register for atapi | |
288 | * identify command to be sure of reply | |
289 | */ | |
aaaade3f | 290 | if (cmd == ATA_CMD_ID_ATAPI) { |
c9ff9e7b | 291 | struct ide_taskfile tf; |
4e65837b | 292 | |
c9ff9e7b | 293 | memset(&tf, 0, sizeof(tf)); |
4e65837b | 294 | /* disable DMA & overlap */ |
c9ff9e7b | 295 | tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE); |
4e65837b | 296 | } |
1da177e4 LT |
297 | |
298 | /* ask drive for ID */ | |
374e042c | 299 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 300 | |
aaaade3f | 301 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
b163f46d | 302 | |
3a7d2484 | 303 | /* wait for IRQ and ATA_DRQ */ |
fa56d4cb BZ |
304 | if (irq_ctx) { |
305 | rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s); | |
306 | if (rc) | |
307 | return 1; | |
308 | } else { | |
309 | rc = ide_busy_sleep(drive, timeout, use_altstatus); | |
310 | if (rc) | |
311 | return 1; | |
312 | ||
313 | msleep(50); | |
314 | s = tp_ops->read_status(hwif); | |
315 | } | |
c47137a9 | 316 | |
3a7d2484 | 317 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 | 318 | /* drive returned ID */ |
2ebe1d9e | 319 | do_identify(drive, cmd, id); |
1da177e4 LT |
320 | /* drive responded with ID */ |
321 | rc = 0; | |
322 | /* clear drive IRQ */ | |
374e042c | 323 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
324 | } else { |
325 | /* drive refused ID */ | |
326 | rc = 2; | |
327 | } | |
328 | return rc; | |
329 | } | |
330 | ||
28ee9bc5 | 331 | int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus) |
3a5015cc | 332 | { |
28ee9bc5 | 333 | ide_hwif_t *hwif = drive->hwif; |
3a5015cc BZ |
334 | u8 stat; |
335 | ||
b163f46d BZ |
336 | timeout += jiffies; |
337 | ||
3a5015cc | 338 | do { |
b163f46d BZ |
339 | msleep(50); /* give drive a breather */ |
340 | stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) | |
341 | : hwif->tp_ops->read_status(hwif); | |
3a7d2484 | 342 | if ((stat & ATA_BUSY) == 0) |
3a5015cc BZ |
343 | return 0; |
344 | } while (time_before(jiffies, timeout)); | |
345 | ||
28ee9bc5 BZ |
346 | printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__); |
347 | ||
b163f46d | 348 | return 1; /* drive timed-out */ |
3a5015cc | 349 | } |
1da177e4 | 350 | |
1f2efb82 BZ |
351 | static u8 ide_read_device(ide_drive_t *drive) |
352 | { | |
3153c26b | 353 | struct ide_taskfile tf; |
1f2efb82 | 354 | |
3153c26b | 355 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE); |
1f2efb82 | 356 | |
3153c26b | 357 | return tf.device; |
1f2efb82 BZ |
358 | } |
359 | ||
1da177e4 LT |
360 | /** |
361 | * do_probe - probe an IDE device | |
362 | * @drive: drive to probe | |
363 | * @cmd: command to use | |
364 | * | |
365 | * do_probe() has the difficult job of finding a drive if it exists, | |
366 | * without getting hung up if it doesn't exist, without trampling on | |
367 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
368 | * | |
369 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
370 | * but does not respond right away, the probe will "hang in there" | |
371 | * for the maximum wait time (about 30 seconds), otherwise it will | |
372 | * exit much more quickly. | |
373 | * | |
374 | * Returns: 0 device was identified | |
375 | * 1 device timed-out (no response to identify request) | |
376 | * 2 device aborted the command (refused to identify itself) | |
377 | * 3 bad status from device (possible for ATAPI drives) | |
378 | * 4 probe was not attempted because failure was obvious | |
379 | */ | |
380 | ||
381 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
382 | { | |
898ec223 | 383 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 384 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
2ebe1d9e | 385 | u16 *id = drive->id; |
57b55275 | 386 | int rc; |
97100fc8 BZ |
387 | u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
388 | ||
389 | /* avoid waiting for inappropriate probes */ | |
390 | if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) | |
391 | return 4; | |
1da177e4 | 392 | |
1da177e4 | 393 | #ifdef DEBUG |
1b8ebad8 | 394 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
97100fc8 | 395 | drive->name, present, drive->media, |
aaaade3f | 396 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
397 | #endif |
398 | ||
399 | /* needed for some systems | |
400 | * (e.g. crw9624 as drive0 with disk as slave) | |
401 | */ | |
402 | msleep(50); | |
fdd88f0a | 403 | tp_ops->dev_select(drive); |
1da177e4 | 404 | msleep(50); |
1f2efb82 | 405 | |
7f612f27 | 406 | if (ide_read_device(drive) != drive->select && present == 0) { |
123995b9 | 407 | if (drive->dn & 1) { |
1da177e4 | 408 | /* exit with drive0 selected */ |
fdd88f0a | 409 | tp_ops->dev_select(hwif->devices[0]); |
3a7d2484 | 410 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
411 | msleep(50); |
412 | } | |
413 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
414 | return 3; | |
415 | } | |
416 | ||
374e042c | 417 | stat = tp_ops->read_status(hwif); |
c47137a9 | 418 | |
3a7d2484 | 419 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
97100fc8 | 420 | present || cmd == ATA_CMD_ID_ATAPI) { |
fa56d4cb | 421 | rc = ide_dev_read_id(drive, cmd, id, 0); |
2ebe1d9e | 422 | if (rc) |
1da177e4 | 423 | /* failed: try again */ |
fa56d4cb | 424 | rc = ide_dev_read_id(drive, cmd, id, 0); |
57b55275 | 425 | |
374e042c | 426 | stat = tp_ops->read_status(hwif); |
57b55275 | 427 | |
3a7d2484 | 428 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
429 | return 4; |
430 | ||
aaaade3f | 431 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
432 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
433 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 434 | msleep(50); |
fdd88f0a | 435 | tp_ops->dev_select(drive); |
1da177e4 | 436 | msleep(50); |
aaaade3f | 437 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
28ee9bc5 | 438 | (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0); |
fa56d4cb | 439 | rc = ide_dev_read_id(drive, cmd, id, 0); |
1da177e4 | 440 | } |
57b55275 BZ |
441 | |
442 | /* ensure drive IRQ is clear */ | |
374e042c | 443 | stat = tp_ops->read_status(hwif); |
57b55275 | 444 | |
1da177e4 | 445 | if (rc == 1) |
57b55275 BZ |
446 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
447 | drive->name, stat); | |
1da177e4 LT |
448 | } else { |
449 | /* not present or maybe ATAPI */ | |
450 | rc = 3; | |
451 | } | |
123995b9 | 452 | if (drive->dn & 1) { |
1da177e4 | 453 | /* exit with drive0 selected */ |
fdd88f0a | 454 | tp_ops->dev_select(hwif->devices[0]); |
1da177e4 LT |
455 | msleep(50); |
456 | /* ensure drive irq is clear */ | |
374e042c | 457 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
458 | } |
459 | return rc; | |
460 | } | |
461 | ||
1da177e4 LT |
462 | /** |
463 | * probe_for_drives - upper level drive probe | |
464 | * @drive: drive to probe for | |
465 | * | |
466 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
467 | * and presents things to the user as needed. | |
468 | * | |
469 | * Returns: 0 no device was found | |
97100fc8 BZ |
470 | * 1 device was found |
471 | * (note: IDE_DFLAG_PRESENT might still be not set) | |
1da177e4 | 472 | */ |
047140ae BZ |
473 | |
474 | static u8 probe_for_drive(ide_drive_t *drive) | |
1da177e4 | 475 | { |
4dde4492 | 476 | char *m; |
1bd4c1f4 BZ |
477 | int rc; |
478 | u8 cmd; | |
4dde4492 | 479 | |
97100fc8 BZ |
480 | drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
481 | ||
4dde4492 BZ |
482 | m = (char *)&drive->id[ATA_ID_PROD]; |
483 | strcpy(m, "UNKNOWN"); | |
484 | ||
1da177e4 | 485 | /* skip probing? */ |
97100fc8 | 486 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
1da177e4 | 487 | /* if !(success||timed-out) */ |
1bd4c1f4 BZ |
488 | cmd = ATA_CMD_ID_ATA; |
489 | rc = do_probe(drive, cmd); | |
490 | if (rc >= 2) { | |
1da177e4 | 491 | /* look for ATAPI device */ |
1bd4c1f4 BZ |
492 | cmd = ATA_CMD_ID_ATAPI; |
493 | rc = do_probe(drive, cmd); | |
494 | } | |
c36a7e98 | 495 | |
97100fc8 | 496 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
5f4417a1 | 497 | return 0; |
4dde4492 | 498 | |
1da177e4 | 499 | /* identification failed? */ |
97100fc8 | 500 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
501 | if (drive->media == ide_disk) { |
502 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
503 | drive->name, drive->cyl, | |
504 | drive->head, drive->sect); | |
505 | } else if (drive->media == ide_cdrom) { | |
506 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
507 | } else { | |
508 | /* nuke it */ | |
509 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
97100fc8 | 510 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 | 511 | } |
1bd4c1f4 BZ |
512 | } else { |
513 | if (cmd == ATA_CMD_ID_ATAPI) | |
514 | ide_classify_atapi_dev(drive); | |
515 | else | |
516 | ide_classify_ata_dev(drive); | |
1da177e4 | 517 | } |
1da177e4 | 518 | } |
97100fc8 BZ |
519 | |
520 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
5f4417a1 | 521 | return 0; |
97100fc8 | 522 | |
1da177e4 | 523 | /* The drive wasn't being helpful. Add generic info only */ |
97100fc8 | 524 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
525 | generic_id(drive); |
526 | return 1; | |
527 | } | |
528 | ||
529 | if (drive->media == ide_disk) { | |
530 | ide_disk_init_chs(drive); | |
531 | ide_disk_init_mult_count(drive); | |
532 | } | |
533 | ||
69197ad7 | 534 | return 1; |
1da177e4 LT |
535 | } |
536 | ||
fc410698 | 537 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
538 | { |
539 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
540 | ||
f36d4024 | 541 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
542 | } |
543 | ||
f74c9141 | 544 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 545 | { |
349ae23f RD |
546 | int ret; |
547 | ||
1da177e4 | 548 | /* register with global device tree */ |
02aa2a37 | 549 | dev_set_name(&hwif->gendev, "%s", hwif->name); |
fcb52077 | 550 | dev_set_drvdata(&hwif->gendev, hwif); |
bb54affa AS |
551 | if (hwif->gendev.parent == NULL) |
552 | hwif->gendev.parent = hwif->dev; | |
1da177e4 | 553 | hwif->gendev.release = hwif_release_dev; |
96d40941 | 554 | |
349ae23f | 555 | ret = device_register(&hwif->gendev); |
f74c9141 | 556 | if (ret < 0) { |
349ae23f | 557 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 558 | __func__, ret); |
f74c9141 BZ |
559 | goto out; |
560 | } | |
561 | ||
3ee074bf | 562 | hwif->portdev = device_create(ide_port_class, &hwif->gendev, |
02aa2a37 | 563 | MKDEV(0, 0), hwif, "%s", hwif->name); |
f74c9141 BZ |
564 | if (IS_ERR(hwif->portdev)) { |
565 | ret = PTR_ERR(hwif->portdev); | |
566 | device_unregister(&hwif->gendev); | |
567 | } | |
f74c9141 BZ |
568 | out: |
569 | return ret; | |
1da177e4 LT |
570 | } |
571 | ||
c860a8f2 BZ |
572 | /** |
573 | * ide_port_wait_ready - wait for port to become ready | |
574 | * @hwif: IDE port | |
575 | * | |
576 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
577 | * platforms. Typical cases are: | |
578 | * | |
579 | * - The firmware hard reset the disk before booting the kernel, | |
580 | * the drive is still doing it's poweron-reset sequence, that | |
581 | * can take up to 30 seconds. | |
582 | * | |
583 | * - The firmware does nothing (or no firmware), the device is | |
584 | * still in POST state (same as above actually). | |
585 | * | |
586 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
587 | * their reset sequence even when they are non-selected slave | |
588 | * devices, thus preventing discovery of the main HD. | |
589 | * | |
590 | * Doing this wait-for-non-busy should not harm any existing | |
591 | * configuration and fix some issues like the above. | |
592 | * | |
593 | * BenH. | |
594 | * | |
595 | * Returns 0 on success, error code (< 0) otherwise. | |
596 | */ | |
597 | ||
598 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 599 | { |
fdd88f0a | 600 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
2bd24a1c BZ |
601 | ide_drive_t *drive; |
602 | int i, rc; | |
1da177e4 LT |
603 | |
604 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
605 | ||
606 | /* Let HW settle down a bit from whatever init state we | |
607 | * come from */ | |
608 | mdelay(2); | |
609 | ||
610 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
611 | * I know of at least one disk who takes 31 seconds, I use 35 | |
612 | * here to be safe | |
613 | */ | |
614 | rc = ide_wait_not_busy(hwif, 35000); | |
615 | if (rc) | |
616 | return rc; | |
617 | ||
618 | /* Now make sure both master & slave are ready */ | |
2bd24a1c | 619 | ide_port_for_each_dev(i, drive, hwif) { |
8266105b | 620 | /* Ignore disks that we will not probe for later. */ |
97100fc8 BZ |
621 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
622 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
fdd88f0a SS |
623 | tp_ops->dev_select(drive); |
624 | tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); | |
8266105b JS |
625 | mdelay(2); |
626 | rc = ide_wait_not_busy(hwif, 35000); | |
627 | if (rc) | |
628 | goto out; | |
629 | } else | |
630 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
631 | drive->name); | |
632 | } | |
633 | out: | |
1da177e4 | 634 | /* Exit function with master reselected (let's be sane) */ |
2bd24a1c | 635 | if (i) |
fdd88f0a | 636 | tp_ops->dev_select(hwif->devices[0]); |
8266105b | 637 | |
1da177e4 LT |
638 | return rc; |
639 | } | |
640 | ||
641 | /** | |
642 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 643 | * @dev1: slave device |
1da177e4 LT |
644 | * |
645 | * Analyse the drives on the interface and attempt to decide if we | |
646 | * have the same drive viewed twice. This occurs with crap CF adapters | |
647 | * and PCMCIA sometimes. | |
648 | */ | |
649 | ||
4dde4492 | 650 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 651 | { |
5e7f3a46 | 652 | ide_drive_t *dev0 = dev1->hwif->devices[0]; |
1da177e4 | 653 | |
97100fc8 | 654 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
655 | return; |
656 | ||
657 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
658 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
659 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
660 | return; |
661 | ||
662 | /* Serial numbers do not match */ | |
4dde4492 BZ |
663 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
664 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
665 | return; |
666 | ||
667 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 668 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
669 | return; |
670 | ||
671 | /* Appears to be an IDE flash adapter with decode bugs */ | |
672 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
673 | ||
97100fc8 | 674 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
675 | } |
676 | ||
677 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
678 | ||
9d501529 | 679 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 680 | { |
2bd24a1c | 681 | ide_drive_t *drive; |
1da177e4 | 682 | unsigned int irqd; |
2bd24a1c | 683 | int i, rc = -ENODEV; |
a14dc574 BZ |
684 | |
685 | BUG_ON(hwif->present); | |
1da177e4 | 686 | |
5e7f3a46 BZ |
687 | if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && |
688 | (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 689 | return -EACCES; |
1da177e4 | 690 | |
1da177e4 LT |
691 | /* |
692 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
693 | * we'll install our IRQ driver much later... | |
694 | */ | |
695 | irqd = hwif->irq; | |
696 | if (irqd) | |
697 | disable_irq(hwif->irq); | |
698 | ||
9ce41aed DM |
699 | if (ide_port_wait_ready(hwif) == -EBUSY) |
700 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); | |
1da177e4 LT |
701 | |
702 | /* | |
f367bed0 BZ |
703 | * Second drive should only exist if first drive was found, |
704 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 705 | */ |
2bd24a1c | 706 | ide_port_for_each_dev(i, drive, hwif) { |
1da177e4 | 707 | (void) probe_for_drive(drive); |
97100fc8 | 708 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 709 | rc = 0; |
1da177e4 | 710 | } |
9ce41aed | 711 | |
1da177e4 LT |
712 | /* |
713 | * Use cached IRQ number. It might be (and is...) changed by probe | |
714 | * code above | |
715 | */ | |
716 | if (irqd) | |
717 | enable_irq(irqd); | |
718 | ||
a14dc574 | 719 | return rc; |
e84e7ea7 BZ |
720 | } |
721 | ||
722 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
723 | { | |
ac95beed | 724 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c BZ |
725 | ide_drive_t *drive; |
726 | int i; | |
f01393e4 | 727 | |
7ed5b157 | 728 | ide_port_for_each_present_dev(i, drive, hwif) { |
8bc1e5aa BZ |
729 | ide_check_nien_quirk_list(drive); |
730 | ||
7ed5b157 BZ |
731 | if (port_ops && port_ops->quirkproc) |
732 | port_ops->quirkproc(drive); | |
f01393e4 | 733 | } |
0380dad4 | 734 | |
7ed5b157 BZ |
735 | ide_port_for_each_present_dev(i, drive, hwif) { |
736 | ide_set_max_pio(drive); | |
1da177e4 | 737 | |
7ed5b157 | 738 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 739 | |
7ed5b157 BZ |
740 | if (hwif->dma_ops) |
741 | ide_set_dma(drive); | |
1da177e4 LT |
742 | } |
743 | } | |
744 | ||
ca18d6f7 | 745 | static void ide_initialize_rq(struct request *rq) |
82ed4db4 CH |
746 | { |
747 | struct ide_request *req = blk_mq_rq_to_pdu(rq); | |
748 | ||
d16a6766 | 749 | req->special = NULL; |
c8d9cf22 | 750 | scsi_req_init(&req->sreq); |
82ed4db4 | 751 | req->sreq.sense = req->sense; |
82ed4db4 CH |
752 | } |
753 | ||
60033520 JA |
754 | static const struct blk_mq_ops ide_mq_ops = { |
755 | .queue_rq = ide_queue_rq, | |
756 | .initialize_rq_fn = ide_initialize_rq, | |
757 | }; | |
758 | ||
1da177e4 LT |
759 | /* |
760 | * init request queue | |
761 | */ | |
762 | static int ide_init_queue(ide_drive_t *drive) | |
763 | { | |
165125e1 | 764 | struct request_queue *q; |
898ec223 | 765 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
766 | int max_sectors = 256; |
767 | int max_sg_entries = PRD_ENTRIES; | |
60033520 | 768 | struct blk_mq_tag_set *set; |
1da177e4 LT |
769 | |
770 | /* | |
771 | * Our default set up assumes the normal IDE case, | |
772 | * that is 64K segmenting, standard PRD setup | |
773 | * and LBA28. Some drivers then impose their own | |
774 | * limits and LBA48 we could raise it but as yet | |
775 | * do not. | |
776 | */ | |
60033520 JA |
777 | |
778 | set = &drive->tag_set; | |
779 | set->ops = &ide_mq_ops; | |
780 | set->nr_hw_queues = 1; | |
781 | set->queue_depth = 32; | |
782 | set->reserved_tags = 1; | |
783 | set->cmd_size = sizeof(struct ide_request); | |
784 | set->numa_node = hwif_to_node(hwif); | |
785 | set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; | |
786 | if (blk_mq_alloc_tag_set(set)) | |
1da177e4 LT |
787 | return 1; |
788 | ||
60033520 JA |
789 | q = blk_mq_init_queue(set); |
790 | if (IS_ERR(q)) { | |
791 | blk_mq_free_tag_set(set); | |
82ed4db4 CH |
792 | return 1; |
793 | } | |
794 | ||
60033520 JA |
795 | blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q); |
796 | ||
1da177e4 LT |
797 | q->queuedata = drive; |
798 | blk_queue_segment_boundary(q, 0xffff); | |
799 | ||
1da177e4 LT |
800 | if (hwif->rqsize < max_sectors) |
801 | max_sectors = hwif->rqsize; | |
086fa5ff | 802 | blk_queue_max_hw_sectors(q, max_sectors); |
1da177e4 LT |
803 | |
804 | #ifdef CONFIG_PCI | |
805 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
806 | * creates segments that don't completely match our boundary | |
807 | * requirements and thus need to be broken up again. Because it | |
808 | * doesn't align properly either, we may actually have to break up | |
809 | * to more segments than what was we got in the first place, a max | |
810 | * worst case is twice as many. | |
811 | * This will be fixed once we teach pci_map_sg() about our boundary | |
812 | * requirements, hopefully soon. *FIXME* | |
813 | */ | |
164c3d09 | 814 | max_sg_entries >>= 1; |
1da177e4 LT |
815 | #endif /* CONFIG_PCI */ |
816 | ||
8a78362c | 817 | blk_queue_max_segments(q, max_sg_entries); |
1da177e4 LT |
818 | |
819 | /* assign drive queue */ | |
820 | drive->queue = q; | |
821 | ||
1da177e4 LT |
822 | return 0; |
823 | } | |
824 | ||
b40d1b88 BZ |
825 | static DEFINE_MUTEX(ide_cfg_mtx); |
826 | ||
d5bc6592 BZ |
827 | /* |
828 | * For any present drive: | |
829 | * - allocate the block device queue | |
d5bc6592 | 830 | */ |
e415e495 | 831 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 832 | { |
2bd24a1c | 833 | ide_drive_t *drive; |
e415e495 | 834 | int i, j = 0; |
d5bc6592 | 835 | |
26042d05 | 836 | mutex_lock(&ide_cfg_mtx); |
7ed5b157 | 837 | ide_port_for_each_present_dev(i, drive, hwif) { |
d5bc6592 BZ |
838 | if (ide_init_queue(drive)) { |
839 | printk(KERN_ERR "ide: failed to init %s\n", | |
840 | drive->name); | |
e415e495 | 841 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
d5bc6592 BZ |
842 | continue; |
843 | } | |
844 | ||
e415e495 | 845 | j++; |
d5bc6592 | 846 | } |
26042d05 | 847 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
848 | |
849 | return j; | |
d5bc6592 BZ |
850 | } |
851 | ||
ffc36c76 BZ |
852 | static void ide_host_enable_irqs(struct ide_host *host) |
853 | { | |
854 | ide_hwif_t *hwif; | |
855 | int i; | |
856 | ||
857 | ide_host_for_each_port(i, hwif, host) { | |
858 | if (hwif == NULL) | |
859 | continue; | |
860 | ||
861 | /* clear any pending IRQs */ | |
862 | hwif->tp_ops->read_status(hwif); | |
863 | ||
864 | /* unmask IRQs */ | |
865 | if (hwif->io_ports.ctl_addr) | |
866 | hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); | |
867 | } | |
868 | } | |
869 | ||
1da177e4 | 870 | /* |
b65fac32 | 871 | * This routine sets up the IRQ for an IDE interface. |
1da177e4 LT |
872 | */ |
873 | static int init_irq (ide_hwif_t *hwif) | |
874 | { | |
4c3032d8 | 875 | struct ide_io_ports *io_ports = &hwif->io_ports; |
255115fb BZ |
876 | struct ide_host *host = hwif->host; |
877 | irq_handler_t irq_handler = host->irq_handler; | |
878 | int sa = host->irq_flags; | |
1da177e4 | 879 | |
849d7130 SG |
880 | if (irq_handler == NULL) |
881 | irq_handler = ide_intr; | |
882 | ||
a259d532 MS |
883 | if (!host->get_lock) |
884 | if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) | |
885 | goto out_up; | |
1da177e4 | 886 | |
7b892806 | 887 | #if !defined(__mc68000__) |
1b8ebad8 | 888 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
889 | io_ports->data_addr, io_ports->status_addr, |
890 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 891 | #else |
1b8ebad8 | 892 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 893 | io_ports->data_addr, hwif->irq); |
7b892806 | 894 | #endif /* __mc68000__ */ |
b65fac32 BZ |
895 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) |
896 | printk(KERN_CONT " (serialized)"); | |
1b8ebad8 | 897 | printk(KERN_CONT "\n"); |
d5bc6592 | 898 | |
1da177e4 | 899 | return 0; |
1da177e4 | 900 | out_up: |
1da177e4 LT |
901 | return 1; |
902 | } | |
903 | ||
904 | static int ata_lock(dev_t dev, void *data) | |
905 | { | |
906 | /* FIXME: we want to pin hwif down */ | |
907 | return 0; | |
908 | } | |
909 | ||
910 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
911 | { | |
912 | ide_hwif_t *hwif = data; | |
913 | int unit = *part >> PARTN_BITS; | |
5e7f3a46 | 914 | ide_drive_t *drive = hwif->devices[unit]; |
97100fc8 BZ |
915 | |
916 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
917 | return NULL; |
918 | ||
919 | if (drive->media == ide_disk) | |
920 | request_module("ide-disk"); | |
1da177e4 LT |
921 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
922 | request_module("ide-cd"); | |
923 | if (drive->media == ide_tape) | |
924 | request_module("ide-tape"); | |
925 | if (drive->media == ide_floppy) | |
926 | request_module("ide-floppy"); | |
927 | ||
928 | return NULL; | |
929 | } | |
930 | ||
931 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
932 | { | |
933 | struct gendisk *p = data; | |
934 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 935 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
936 | } |
937 | ||
938 | static int exact_lock(dev_t dev, void *data) | |
939 | { | |
940 | struct gendisk *p = data; | |
941 | ||
3079c22e | 942 | if (!get_disk_and_module(p)) |
1da177e4 LT |
943 | return -1; |
944 | return 0; | |
945 | } | |
946 | ||
947 | void ide_register_region(struct gendisk *disk) | |
948 | { | |
949 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
950 | disk->minors, NULL, exact_match, exact_lock, disk); | |
951 | } | |
952 | ||
953 | EXPORT_SYMBOL_GPL(ide_register_region); | |
954 | ||
955 | void ide_unregister_region(struct gendisk *disk) | |
956 | { | |
957 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
958 | disk->minors); | |
959 | } | |
960 | ||
961 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
962 | ||
963 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
964 | { | |
965 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 966 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
967 | |
968 | disk->major = hwif->major; | |
969 | disk->first_minor = unit << PARTN_BITS; | |
970 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
971 | disk->queue = drive->queue; | |
972 | } | |
973 | ||
974 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
975 | ||
976 | static void drive_release_dev (struct device *dev) | |
977 | { | |
978 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
979 | ||
5b0c4b30 BZ |
980 | ide_proc_unregister_device(drive); |
981 | ||
60033520 JA |
982 | if (drive->sense_rq) |
983 | blk_mq_free_request(drive->sense_rq); | |
984 | ||
b5479167 BZ |
985 | blk_cleanup_queue(drive->queue); |
986 | drive->queue = NULL; | |
60033520 | 987 | blk_mq_free_tag_set(&drive->tag_set); |
b5479167 | 988 | |
97100fc8 | 989 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 990 | |
f36d4024 | 991 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
992 | } |
993 | ||
1da177e4 LT |
994 | static int hwif_init(ide_hwif_t *hwif) |
995 | { | |
1da177e4 | 996 | if (!hwif->irq) { |
8b07ed26 BZ |
997 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
998 | return 0; | |
1da177e4 | 999 | } |
1da177e4 | 1000 | |
1da177e4 LT |
1001 | if (register_blkdev(hwif->major, hwif->name)) |
1002 | return 0; | |
1003 | ||
1004 | if (!hwif->sg_max_nents) | |
1005 | hwif->sg_max_nents = PRD_ENTRIES; | |
1006 | ||
6da2ec56 KC |
1007 | hwif->sg_table = kmalloc_array(hwif->sg_max_nents, |
1008 | sizeof(struct scatterlist), | |
1009 | GFP_KERNEL); | |
1da177e4 LT |
1010 | if (!hwif->sg_table) { |
1011 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1012 | goto out; | |
1013 | } | |
45711f1a JA |
1014 | |
1015 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 | 1016 | |
1da177e4 | 1017 | if (init_irq(hwif)) { |
8b07ed26 BZ |
1018 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1019 | hwif->name, hwif->irq); | |
1da177e4 LT |
1020 | goto out; |
1021 | } | |
1da177e4 | 1022 | |
3a4e7c96 BZ |
1023 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1024 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1025 | return 1; |
1026 | ||
1027 | out: | |
1028 | unregister_blkdev(hwif->major, hwif->name); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
9601a607 BZ |
1032 | static void hwif_register_devices(ide_hwif_t *hwif) |
1033 | { | |
2bd24a1c | 1034 | ide_drive_t *drive; |
9601a607 BZ |
1035 | unsigned int i; |
1036 | ||
7ed5b157 | 1037 | ide_port_for_each_present_dev(i, drive, hwif) { |
c5d70cc7 BZ |
1038 | struct device *dev = &drive->gendev; |
1039 | int ret; | |
9601a607 | 1040 | |
dc09c784 | 1041 | dev_set_name(dev, "%u.%u", hwif->index, i); |
fcb52077 | 1042 | dev_set_drvdata(dev, drive); |
c5d70cc7 BZ |
1043 | dev->parent = &hwif->gendev; |
1044 | dev->bus = &ide_bus_type; | |
c5d70cc7 BZ |
1045 | dev->release = drive_release_dev; |
1046 | ||
1047 | ret = device_register(dev); | |
1048 | if (ret < 0) | |
1049 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1050 | "%d\n", __func__, ret); | |
9601a607 BZ |
1051 | } |
1052 | } | |
1053 | ||
7704ca2a BZ |
1054 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1055 | { | |
ac95beed | 1056 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c | 1057 | ide_drive_t *drive; |
7704ca2a BZ |
1058 | int i; |
1059 | ||
2bd24a1c | 1060 | ide_port_for_each_dev(i, drive, hwif) { |
123995b9 BZ |
1061 | drive->dn = i + hwif->channel * 2; |
1062 | ||
7704ca2a BZ |
1063 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1064 | drive->io_32bit = 1; | |
7610c4f5 BZ |
1065 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
1066 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
7704ca2a | 1067 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) |
97100fc8 | 1068 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1069 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1070 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1071 | |
d2d4e780 BZ |
1072 | drive->pio_mode = XFER_PIO_0; |
1073 | ||
e6d95bd1 BZ |
1074 | if (port_ops && port_ops->init_dev) |
1075 | port_ops->init_dev(drive); | |
1076 | } | |
7704ca2a BZ |
1077 | } |
1078 | ||
c413b9b9 BZ |
1079 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1080 | const struct ide_port_info *d) | |
8447d9d5 | 1081 | { |
b7691646 | 1082 | hwif->channel = port; |
c413b9b9 | 1083 | |
29e52cf7 | 1084 | hwif->chipset = d->chipset ? d->chipset : ide_pci; |
c413b9b9 BZ |
1085 | |
1086 | if (d->init_iops) | |
1087 | d->init_iops(hwif); | |
1088 | ||
23f8e4bf BZ |
1089 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1090 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1091 | hwif->pio_mask = d->pio_mask; |
1092 | ||
374e042c BZ |
1093 | if (d->tp_ops) |
1094 | hwif->tp_ops = d->tp_ops; | |
1095 | ||
ac95beed | 1096 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
2787cb8a | 1097 | if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) |
ac95beed BZ |
1098 | hwif->port_ops = d->port_ops; |
1099 | ||
c413b9b9 BZ |
1100 | hwif->swdma_mask = d->swdma_mask; |
1101 | hwif->mwdma_mask = d->mwdma_mask; | |
1102 | hwif->ultra_mask = d->udma_mask; | |
1103 | ||
b123f56e BZ |
1104 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1105 | int rc; | |
1106 | ||
592b5315 SS |
1107 | hwif->dma_ops = d->dma_ops; |
1108 | ||
b123f56e BZ |
1109 | if (d->init_dma) |
1110 | rc = d->init_dma(hwif, d); | |
1111 | else | |
1112 | rc = ide_hwif_setup_dma(hwif, d); | |
1113 | ||
1114 | if (rc < 0) { | |
1115 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
592b5315 SS |
1116 | |
1117 | hwif->dma_ops = NULL; | |
ebb00fb5 | 1118 | hwif->dma_base = 0; |
b123f56e BZ |
1119 | hwif->swdma_mask = 0; |
1120 | hwif->mwdma_mask = 0; | |
1121 | hwif->ultra_mask = 0; | |
592b5315 | 1122 | } |
b123f56e | 1123 | } |
c413b9b9 | 1124 | |
1024c5f4 | 1125 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
702c026b BZ |
1126 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1127 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; | |
1024c5f4 | 1128 | |
6b492496 BZ |
1129 | if (d->max_sectors) |
1130 | hwif->rqsize = d->max_sectors; | |
70775e9c BZ |
1131 | else { |
1132 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1133 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1134 | hwif->rqsize = 256; | |
1135 | else | |
1136 | hwif->rqsize = 65536; | |
1137 | } | |
c413b9b9 BZ |
1138 | |
1139 | /* call chipset specific routine for each enabled port */ | |
1140 | if (d->init_hwif) | |
1141 | d->init_hwif(hwif); | |
c7f6f21a | 1142 | } |
bfa14b42 | 1143 | |
c7f6f21a BZ |
1144 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1145 | { | |
ac95beed BZ |
1146 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1147 | ||
1148 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1149 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1150 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1151 | } |
c413b9b9 BZ |
1152 | } |
1153 | ||
60033520 JA |
1154 | /* |
1155 | * Deferred request list insertion handler | |
1156 | */ | |
1157 | static void drive_rq_insert_work(struct work_struct *work) | |
1158 | { | |
1159 | ide_drive_t *drive = container_of(work, ide_drive_t, rq_work); | |
1160 | ide_hwif_t *hwif = drive->hwif; | |
1161 | struct request *rq; | |
9a6d5488 | 1162 | blk_status_t ret; |
60033520 JA |
1163 | LIST_HEAD(list); |
1164 | ||
9a6d5488 | 1165 | blk_mq_quiesce_queue(drive->queue); |
60033520 | 1166 | |
9a6d5488 JA |
1167 | ret = BLK_STS_OK; |
1168 | spin_lock_irq(&hwif->lock); | |
1169 | while (!list_empty(&drive->rq_list)) { | |
1170 | rq = list_first_entry(&drive->rq_list, struct request, queuelist); | |
60033520 | 1171 | list_del_init(&rq->queuelist); |
9a6d5488 JA |
1172 | |
1173 | spin_unlock_irq(&hwif->lock); | |
1174 | ret = ide_issue_rq(drive, rq, true); | |
1175 | spin_lock_irq(&hwif->lock); | |
60033520 | 1176 | } |
9a6d5488 JA |
1177 | spin_unlock_irq(&hwif->lock); |
1178 | ||
1179 | blk_mq_unquiesce_queue(drive->queue); | |
1180 | ||
1181 | if (ret != BLK_STS_OK) | |
1182 | kblockd_schedule_work(&drive->rq_work); | |
60033520 JA |
1183 | } |
1184 | ||
b40d1b88 BZ |
1185 | static const u8 ide_hwif_to_major[] = |
1186 | { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, | |
1187 | IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; | |
1188 | ||
1189 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
1190 | { | |
2bd24a1c BZ |
1191 | ide_drive_t *drive; |
1192 | int i; | |
b40d1b88 | 1193 | |
2bd24a1c BZ |
1194 | ide_port_for_each_dev(i, drive, hwif) { |
1195 | u8 j = (hwif->index * MAX_DRIVES) + i; | |
5f4417a1 | 1196 | u16 *saved_id = drive->id; |
b40d1b88 BZ |
1197 | |
1198 | memset(drive, 0, sizeof(*drive)); | |
5f4417a1 HD |
1199 | memset(saved_id, 0, SECTOR_SIZE); |
1200 | drive->id = saved_id; | |
b40d1b88 BZ |
1201 | |
1202 | drive->media = ide_disk; | |
2bd24a1c | 1203 | drive->select = (i << 4) | ATA_DEVICE_OBS; |
b40d1b88 BZ |
1204 | drive->hwif = hwif; |
1205 | drive->ready_stat = ATA_DRDY; | |
1206 | drive->bad_wstat = BAD_W_STAT; | |
ca1b96e0 BZ |
1207 | drive->special_flags = IDE_SFLAG_RECALIBRATE | |
1208 | IDE_SFLAG_SET_GEOMETRY; | |
b40d1b88 BZ |
1209 | drive->name[0] = 'h'; |
1210 | drive->name[1] = 'd'; | |
1211 | drive->name[2] = 'a' + j; | |
1212 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; | |
1213 | ||
1214 | INIT_LIST_HEAD(&drive->list); | |
1215 | init_completion(&drive->gendev_rel_comp); | |
60033520 JA |
1216 | |
1217 | INIT_WORK(&drive->rq_work, drive_rq_insert_work); | |
1218 | INIT_LIST_HEAD(&drive->rq_list); | |
b40d1b88 BZ |
1219 | } |
1220 | } | |
1221 | ||
1222 | static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) | |
1223 | { | |
b40d1b88 BZ |
1224 | /* fill in any non-zero initial values */ |
1225 | hwif->index = index; | |
1226 | hwif->major = ide_hwif_to_major[index]; | |
1227 | ||
1228 | hwif->name[0] = 'i'; | |
1229 | hwif->name[1] = 'd'; | |
1230 | hwif->name[2] = 'e'; | |
1231 | hwif->name[3] = '0' + index; | |
1232 | ||
7362951b BZ |
1233 | spin_lock_init(&hwif->lock); |
1234 | ||
10738ba8 | 1235 | timer_setup(&hwif->timer, ide_timer_expiry, 0); |
7362951b | 1236 | |
b40d1b88 BZ |
1237 | init_completion(&hwif->gendev_rel_comp); |
1238 | ||
1239 | hwif->tp_ops = &default_tp_ops; | |
1240 | ||
1241 | ide_port_init_devices_data(hwif); | |
1242 | } | |
1243 | ||
9f36d314 | 1244 | static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw) |
b40d1b88 BZ |
1245 | { |
1246 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); | |
1247 | hwif->irq = hw->irq; | |
b40d1b88 BZ |
1248 | hwif->dev = hw->dev; |
1249 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
b40d1b88 BZ |
1250 | hwif->config_data = hw->config; |
1251 | } | |
1252 | ||
8cdf3100 BZ |
1253 | static unsigned int ide_indexes; |
1254 | ||
fe80b937 | 1255 | /** |
8cdf3100 | 1256 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1257 | * @d: IDE port info |
1258 | * | |
8cdf3100 | 1259 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1260 | */ |
1261 | ||
8cdf3100 | 1262 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1263 | { |
8cdf3100 | 1264 | int idx = -ENOENT; |
fe80b937 | 1265 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
a419aef8 | 1266 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; |
fe80b937 BZ |
1267 | |
1268 | /* | |
1269 | * Claim an unassigned slot. | |
1270 | * | |
1271 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1272 | * just in case there's another interface yet-to-be-scanned | |
1273 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1274 | * | |
1275 | * Unless there is a bootable card that does not use the standard | |
1276 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1277 | */ | |
8cdf3100 | 1278 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1279 | if (bootable) { |
1280 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1281 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1282 | } else { |
75d21fff BZ |
1283 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1284 | idx = ffz(ide_indexes | 3); | |
1285 | else if ((ide_indexes & 3) != 3) | |
1286 | idx = ffz(ide_indexes); | |
fe80b937 | 1287 | } |
8cdf3100 BZ |
1288 | if (idx >= 0) |
1289 | ide_indexes |= (1 << idx); | |
1290 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1291 | |
8cdf3100 BZ |
1292 | return idx; |
1293 | } | |
256c5f8e | 1294 | |
8cdf3100 BZ |
1295 | static void ide_free_port_slot(int idx) |
1296 | { | |
1297 | mutex_lock(&ide_cfg_mtx); | |
1298 | ide_indexes &= ~(1 << idx); | |
1299 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1300 | } |
fe80b937 | 1301 | |
5e7f3a46 BZ |
1302 | static void ide_port_free_devices(ide_hwif_t *hwif) |
1303 | { | |
2bd24a1c | 1304 | ide_drive_t *drive; |
5e7f3a46 BZ |
1305 | int i; |
1306 | ||
5f4417a1 HD |
1307 | ide_port_for_each_dev(i, drive, hwif) { |
1308 | kfree(drive->id); | |
2bd24a1c | 1309 | kfree(drive); |
5f4417a1 | 1310 | } |
5e7f3a46 BZ |
1311 | } |
1312 | ||
1313 | static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) | |
1314 | { | |
82ed4db4 | 1315 | ide_drive_t *drive; |
5e7f3a46 BZ |
1316 | int i; |
1317 | ||
1318 | for (i = 0; i < MAX_DRIVES; i++) { | |
5e7f3a46 BZ |
1319 | drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); |
1320 | if (drive == NULL) | |
1321 | goto out_nomem; | |
1322 | ||
5f4417a1 HD |
1323 | /* |
1324 | * In order to keep things simple we have an id | |
1325 | * block for all drives at all times. If the device | |
1326 | * is pre ATA or refuses ATA/ATAPI identify we | |
1327 | * will add faked data to this. | |
1328 | * | |
1329 | * Also note that 0 everywhere means "can't do X" | |
1330 | */ | |
1331 | drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node); | |
1332 | if (drive->id == NULL) | |
82ed4db4 CH |
1333 | goto out_free_drive; |
1334 | ||
5e7f3a46 BZ |
1335 | hwif->devices[i] = drive; |
1336 | } | |
1337 | return 0; | |
1338 | ||
82ed4db4 CH |
1339 | out_free_drive: |
1340 | kfree(drive); | |
5e7f3a46 BZ |
1341 | out_nomem: |
1342 | ide_port_free_devices(hwif); | |
1343 | return -ENOMEM; | |
1344 | } | |
1345 | ||
9f36d314 BZ |
1346 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, |
1347 | struct ide_hw **hws, unsigned int n_ports) | |
48c3c107 BZ |
1348 | { |
1349 | struct ide_host *host; | |
a32296f9 BZ |
1350 | struct device *dev = hws[0] ? hws[0]->dev : NULL; |
1351 | int node = dev ? dev_to_node(dev) : -1; | |
48c3c107 BZ |
1352 | int i; |
1353 | ||
a32296f9 | 1354 | host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); |
48c3c107 BZ |
1355 | if (host == NULL) |
1356 | return NULL; | |
1357 | ||
dca39830 | 1358 | for (i = 0; i < n_ports; i++) { |
48c3c107 | 1359 | ide_hwif_t *hwif; |
8cdf3100 | 1360 | int idx; |
48c3c107 BZ |
1361 | |
1362 | if (hws[i] == NULL) | |
1363 | continue; | |
1364 | ||
a32296f9 | 1365 | hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); |
18de1017 BZ |
1366 | if (hwif == NULL) |
1367 | continue; | |
1368 | ||
5e7f3a46 BZ |
1369 | if (ide_port_alloc_devices(hwif, node) < 0) { |
1370 | kfree(hwif); | |
1371 | continue; | |
1372 | } | |
1373 | ||
8cdf3100 BZ |
1374 | idx = ide_find_port_slot(d); |
1375 | if (idx < 0) { | |
1376 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1377 | d ? d->name : "ide"); | |
5f4417a1 | 1378 | ide_port_free_devices(hwif); |
18de1017 | 1379 | kfree(hwif); |
8cdf3100 | 1380 | continue; |
48c3c107 | 1381 | } |
8cdf3100 | 1382 | |
8cdf3100 BZ |
1383 | ide_init_port_data(hwif, idx); |
1384 | ||
08da591e BZ |
1385 | hwif->host = host; |
1386 | ||
8cdf3100 BZ |
1387 | host->ports[i] = hwif; |
1388 | host->n_ports++; | |
48c3c107 BZ |
1389 | } |
1390 | ||
1391 | if (host->n_ports == 0) { | |
1392 | kfree(host); | |
1393 | return NULL; | |
1394 | } | |
1395 | ||
a32296f9 | 1396 | host->dev[0] = dev; |
6cdf6eb3 | 1397 | |
feb22b7f BZ |
1398 | if (d) { |
1399 | host->init_chipset = d->init_chipset; | |
e354c1d8 BZ |
1400 | host->get_lock = d->get_lock; |
1401 | host->release_lock = d->release_lock; | |
ef0b0427 | 1402 | host->host_flags = d->host_flags; |
aa07573b | 1403 | host->irq_flags = d->irq_flags; |
feb22b7f | 1404 | } |
ef0b0427 | 1405 | |
48c3c107 BZ |
1406 | return host; |
1407 | } | |
48c3c107 BZ |
1408 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1409 | ||
9a100f4b BZ |
1410 | static void ide_port_free(ide_hwif_t *hwif) |
1411 | { | |
1412 | ide_port_free_devices(hwif); | |
1413 | ide_free_port_slot(hwif->index); | |
1414 | kfree(hwif); | |
1415 | } | |
1416 | ||
1417 | static void ide_disable_port(ide_hwif_t *hwif) | |
1418 | { | |
1419 | struct ide_host *host = hwif->host; | |
1420 | int i; | |
1421 | ||
1422 | printk(KERN_INFO "%s: disabling port\n", hwif->name); | |
1423 | ||
1424 | for (i = 0; i < MAX_HOST_PORTS; i++) { | |
1425 | if (host->ports[i] == hwif) { | |
1426 | host->ports[i] = NULL; | |
1427 | host->n_ports--; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | ide_port_free(hwif); | |
1432 | } | |
1433 | ||
48c3c107 | 1434 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
9f36d314 | 1435 | struct ide_hw **hws) |
c413b9b9 BZ |
1436 | { |
1437 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1438 | int i, j = 0; |
8447d9d5 | 1439 | |
7ad19a99 CH |
1440 | pr_warn("legacy IDE will be removed in 2021, please switch to libata\n" |
1441 | "Report any missing HW support to linux-ide@vger.kernel.org\n"); | |
1442 | ||
2bd24a1c | 1443 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 | 1444 | if (hwif == NULL) { |
c413b9b9 BZ |
1445 | mate = NULL; |
1446 | continue; | |
1447 | } | |
1448 | ||
c97c6aca | 1449 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1450 | ide_port_apply_params(hwif); |
1451 | ||
0a6e49e9 BZ |
1452 | if ((i & 1) && mate) { |
1453 | hwif->mate = mate; | |
1454 | mate->mate = hwif; | |
123995b9 | 1455 | } |
c413b9b9 | 1456 | |
0a6e49e9 BZ |
1457 | mate = (i & 1) ? NULL : hwif; |
1458 | ||
1459 | ide_init_port(hwif, i & 1, d); | |
1460 | ide_port_cable_detect(hwif); | |
5880b5de BZ |
1461 | |
1462 | hwif->port_flags |= IDE_PFLAG_PROBING; | |
1463 | ||
7704ca2a | 1464 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1465 | } |
1466 | ||
2bd24a1c | 1467 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1468 | if (hwif == NULL) |
1469 | continue; | |
139ddfca | 1470 | |
eb716beb BZ |
1471 | if (ide_probe_port(hwif) == 0) |
1472 | hwif->present = 1; | |
a14dc574 | 1473 | |
5880b5de BZ |
1474 | hwif->port_flags &= ~IDE_PFLAG_PROBING; |
1475 | ||
c094ea07 BZ |
1476 | if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || |
1477 | hwif->mate == NULL || hwif->mate->present == 0) { | |
9a100f4b BZ |
1478 | if (ide_register_port(hwif)) { |
1479 | ide_disable_port(hwif); | |
1480 | continue; | |
1481 | } | |
1482 | } | |
a14dc574 | 1483 | |
eb716beb BZ |
1484 | if (hwif->present) |
1485 | ide_port_tune_devices(hwif); | |
2e13093a | 1486 | } |
ba6560aa | 1487 | |
ffc36c76 BZ |
1488 | ide_host_enable_irqs(host); |
1489 | ||
2bd24a1c | 1490 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1491 | if (hwif == NULL) |
1492 | continue; | |
ba6560aa BZ |
1493 | |
1494 | if (hwif_init(hwif) == 0) { | |
1495 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1496 | "interface\n", hwif->name); | |
d410a641 | 1497 | device_unregister(hwif->portdev); |
51d6ac70 IC |
1498 | device_unregister(&hwif->gendev); |
1499 | ide_disable_port(hwif); | |
ba6560aa BZ |
1500 | continue; |
1501 | } | |
decdc3f0 | 1502 | |
eb716beb | 1503 | if (hwif->present) |
e415e495 EO |
1504 | if (ide_port_setup_devices(hwif) == 0) { |
1505 | hwif->present = 0; | |
1506 | continue; | |
1507 | } | |
1508 | ||
1509 | j++; | |
26042d05 | 1510 | |
8b803bd1 | 1511 | ide_acpi_init_port(hwif); |
eb716beb BZ |
1512 | |
1513 | if (hwif->present) | |
1514 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1515 | } |
1516 | ||
2bd24a1c | 1517 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1518 | if (hwif == NULL) |
1519 | continue; | |
327617e1 | 1520 | |
eb716beb BZ |
1521 | ide_sysfs_register_port(hwif); |
1522 | ide_proc_register_port(hwif); | |
1523 | ||
dbee0322 | 1524 | if (hwif->present) { |
d9270a3f | 1525 | ide_proc_port_register_devices(hwif); |
dbee0322 WS |
1526 | hwif_register_devices(hwif); |
1527 | } | |
8447d9d5 BZ |
1528 | } |
1529 | ||
e0d00207 | 1530 | return j ? 0 : -1; |
8447d9d5 | 1531 | } |
48c3c107 | 1532 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1533 | |
9f36d314 | 1534 | int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws, |
dca39830 | 1535 | unsigned int n_ports, struct ide_host **hostp) |
6f904d01 BZ |
1536 | { |
1537 | struct ide_host *host; | |
8a69580e | 1538 | int rc; |
6f904d01 | 1539 | |
dca39830 | 1540 | host = ide_host_alloc(d, hws, n_ports); |
6f904d01 BZ |
1541 | if (host == NULL) |
1542 | return -ENOMEM; | |
1543 | ||
8a69580e BZ |
1544 | rc = ide_host_register(host, d, hws); |
1545 | if (rc) { | |
1546 | ide_host_free(host); | |
1547 | return rc; | |
1548 | } | |
6f904d01 BZ |
1549 | |
1550 | if (hostp) | |
1551 | *hostp = host; | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1556 | ||
b40d1b88 BZ |
1557 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
1558 | { | |
2bd24a1c | 1559 | ide_drive_t *drive; |
b40d1b88 BZ |
1560 | int i; |
1561 | ||
7ed5b157 BZ |
1562 | ide_port_for_each_present_dev(i, drive, hwif) { |
1563 | device_unregister(&drive->gendev); | |
1564 | wait_for_completion(&drive->gendev_rel_comp); | |
b40d1b88 BZ |
1565 | } |
1566 | } | |
1567 | ||
1568 | void ide_port_unregister_devices(ide_hwif_t *hwif) | |
1569 | { | |
1570 | mutex_lock(&ide_cfg_mtx); | |
1571 | __ide_port_unregister_devices(hwif); | |
1572 | hwif->present = 0; | |
1573 | ide_port_init_devices_data(hwif); | |
1574 | mutex_unlock(&ide_cfg_mtx); | |
1575 | } | |
1576 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
1577 | ||
1578 | /** | |
1579 | * ide_unregister - free an IDE interface | |
1580 | * @hwif: IDE interface | |
1581 | * | |
1582 | * Perform the final unregister of an IDE interface. | |
1583 | * | |
1584 | * Locking: | |
1585 | * The caller must not hold the IDE locks. | |
1586 | * | |
1587 | * It is up to the caller to be sure there is no pending I/O here, | |
1588 | * and that the interface will not be reopened (present/vanishing | |
1589 | * locking isn't yet done BTW). | |
1590 | */ | |
1591 | ||
1592 | static void ide_unregister(ide_hwif_t *hwif) | |
1593 | { | |
1594 | BUG_ON(in_interrupt()); | |
1595 | BUG_ON(irqs_disabled()); | |
1596 | ||
1597 | mutex_lock(&ide_cfg_mtx); | |
1598 | ||
1599 | if (hwif->present) { | |
1600 | __ide_port_unregister_devices(hwif); | |
1601 | hwif->present = 0; | |
1602 | } | |
1603 | ||
1604 | ide_proc_unregister_port(hwif); | |
1605 | ||
a259d532 MS |
1606 | if (!hwif->host->get_lock) |
1607 | free_irq(hwif->irq, hwif); | |
b40d1b88 BZ |
1608 | |
1609 | device_unregister(hwif->portdev); | |
1610 | device_unregister(&hwif->gendev); | |
1611 | wait_for_completion(&hwif->gendev_rel_comp); | |
1612 | ||
1613 | /* | |
1614 | * Remove us from the kernel's knowledge | |
1615 | */ | |
1616 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
1617 | kfree(hwif->sg_table); | |
1618 | unregister_blkdev(hwif->major, hwif->name); | |
1619 | ||
1620 | ide_release_dma_engine(hwif); | |
1621 | ||
1622 | mutex_unlock(&ide_cfg_mtx); | |
1623 | } | |
1624 | ||
8a69580e | 1625 | void ide_host_free(struct ide_host *host) |
151575e4 | 1626 | { |
8cdf3100 | 1627 | ide_hwif_t *hwif; |
151575e4 | 1628 | int i; |
8447d9d5 | 1629 | |
2bd24a1c | 1630 | ide_host_for_each_port(i, hwif, host) { |
9a100f4b BZ |
1631 | if (hwif) |
1632 | ide_port_free(hwif); | |
c97c6aca | 1633 | } |
151575e4 | 1634 | |
48c3c107 | 1635 | kfree(host); |
151575e4 | 1636 | } |
8a69580e BZ |
1637 | EXPORT_SYMBOL_GPL(ide_host_free); |
1638 | ||
1639 | void ide_host_remove(struct ide_host *host) | |
1640 | { | |
2bd24a1c | 1641 | ide_hwif_t *hwif; |
8a69580e BZ |
1642 | int i; |
1643 | ||
2bd24a1c BZ |
1644 | ide_host_for_each_port(i, hwif, host) { |
1645 | if (hwif) | |
1646 | ide_unregister(hwif); | |
8a69580e BZ |
1647 | } |
1648 | ||
1649 | ide_host_free(host); | |
1650 | } | |
48c3c107 | 1651 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1652 | |
1653 | void ide_port_scan(ide_hwif_t *hwif) | |
1654 | { | |
5880b5de BZ |
1655 | int rc; |
1656 | ||
9fd91d95 | 1657 | ide_port_apply_params(hwif); |
2dde7861 | 1658 | ide_port_cable_detect(hwif); |
5880b5de BZ |
1659 | |
1660 | hwif->port_flags |= IDE_PFLAG_PROBING; | |
1661 | ||
2dde7861 BZ |
1662 | ide_port_init_devices(hwif); |
1663 | ||
5880b5de BZ |
1664 | rc = ide_probe_port(hwif); |
1665 | ||
1666 | hwif->port_flags &= ~IDE_PFLAG_PROBING; | |
1667 | ||
1668 | if (rc < 0) | |
2dde7861 BZ |
1669 | return; |
1670 | ||
1671 | hwif->present = 1; | |
1672 | ||
1673 | ide_port_tune_devices(hwif); | |
2dde7861 | 1674 | ide_port_setup_devices(hwif); |
e630fcbe | 1675 | ide_acpi_port_init_devices(hwif); |
2dde7861 BZ |
1676 | hwif_register_devices(hwif); |
1677 | ide_proc_port_register_devices(hwif); | |
1678 | } | |
1679 | EXPORT_SYMBOL_GPL(ide_port_scan); |