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path: root/drivers/ide/ide-iops.c
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-rw-r--r--drivers/ide/ide-iops.c742
1 files changed, 29 insertions, 713 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index b1892bd95c6f..317c5dadd7c0 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -27,35 +27,7 @@
27#include <asm/uaccess.h> 27#include <asm/uaccess.h>
28#include <asm/io.h> 28#include <asm/io.h>
29 29
30/* 30void SELECT_DRIVE(ide_drive_t *drive)
31 * Conventional PIO operations for ATA devices
32 */
33
34static u8 ide_inb (unsigned long port)
35{
36 return (u8) inb(port);
37}
38
39static void ide_outb (u8 val, unsigned long port)
40{
41 outb(val, port);
42}
43
44/*
45 * MMIO operations, typically used for SATA controllers
46 */
47
48static u8 ide_mm_inb (unsigned long port)
49{
50 return (u8) readb((void __iomem *) port);
51}
52
53static void ide_mm_outb (u8 value, unsigned long port)
54{
55 writeb(value, (void __iomem *) port);
56}
57
58void SELECT_DRIVE (ide_drive_t *drive)
59{ 31{
60 ide_hwif_t *hwif = drive->hwif; 32 ide_hwif_t *hwif = drive->hwif;
61 const struct ide_port_ops *port_ops = hwif->port_ops; 33 const struct ide_port_ops *port_ops = hwif->port_ops;
@@ -78,277 +50,6 @@ void SELECT_MASK(ide_drive_t *drive, int mask)
78 port_ops->maskproc(drive, mask); 50 port_ops->maskproc(drive, mask);
79} 51}
80 52
81void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
82{
83 if (hwif->host_flags & IDE_HFLAG_MMIO)
84 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
85 else
86 outb(cmd, hwif->io_ports.command_addr);
87}
88EXPORT_SYMBOL_GPL(ide_exec_command);
89
90u8 ide_read_status(ide_hwif_t *hwif)
91{
92 if (hwif->host_flags & IDE_HFLAG_MMIO)
93 return readb((void __iomem *)hwif->io_ports.status_addr);
94 else
95 return inb(hwif->io_ports.status_addr);
96}
97EXPORT_SYMBOL_GPL(ide_read_status);
98
99u8 ide_read_altstatus(ide_hwif_t *hwif)
100{
101 if (hwif->host_flags & IDE_HFLAG_MMIO)
102 return readb((void __iomem *)hwif->io_ports.ctl_addr);
103 else
104 return inb(hwif->io_ports.ctl_addr);
105}
106EXPORT_SYMBOL_GPL(ide_read_altstatus);
107
108void ide_set_irq(ide_hwif_t *hwif, int on)
109{
110 u8 ctl = ATA_DEVCTL_OBS;
111
112 if (on == 4) { /* hack for SRST */
113 ctl |= 4;
114 on &= ~4;
115 }
116
117 ctl |= on ? 0 : 2;
118
119 if (hwif->host_flags & IDE_HFLAG_MMIO)
120 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
121 else
122 outb(ctl, hwif->io_ports.ctl_addr);
123}
124EXPORT_SYMBOL_GPL(ide_set_irq);
125
126void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
127{
128 ide_hwif_t *hwif = drive->hwif;
129 struct ide_io_ports *io_ports = &hwif->io_ports;
130 struct ide_taskfile *tf = &task->tf;
131 void (*tf_outb)(u8 addr, unsigned long port);
132 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
133 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
134
135 if (mmio)
136 tf_outb = ide_mm_outb;
137 else
138 tf_outb = ide_outb;
139
140 if (task->tf_flags & IDE_TFLAG_FLAGGED)
141 HIHI = 0xFF;
142
143 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
144 u16 data = (tf->hob_data << 8) | tf->data;
145
146 if (mmio)
147 writew(data, (void __iomem *)io_ports->data_addr);
148 else
149 outw(data, io_ports->data_addr);
150 }
151
152 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
153 tf_outb(tf->hob_feature, io_ports->feature_addr);
154 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
155 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
156 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
157 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
158 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
159 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
160 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
161 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
162
163 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
164 tf_outb(tf->feature, io_ports->feature_addr);
165 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
166 tf_outb(tf->nsect, io_ports->nsect_addr);
167 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
168 tf_outb(tf->lbal, io_ports->lbal_addr);
169 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
170 tf_outb(tf->lbam, io_ports->lbam_addr);
171 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
172 tf_outb(tf->lbah, io_ports->lbah_addr);
173
174 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
175 tf_outb((tf->device & HIHI) | drive->select,
176 io_ports->device_addr);
177}
178EXPORT_SYMBOL_GPL(ide_tf_load);
179
180void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
181{
182 ide_hwif_t *hwif = drive->hwif;
183 struct ide_io_ports *io_ports = &hwif->io_ports;
184 struct ide_taskfile *tf = &task->tf;
185 void (*tf_outb)(u8 addr, unsigned long port);
186 u8 (*tf_inb)(unsigned long port);
187 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
188
189 if (mmio) {
190 tf_outb = ide_mm_outb;
191 tf_inb = ide_mm_inb;
192 } else {
193 tf_outb = ide_outb;
194 tf_inb = ide_inb;
195 }
196
197 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
198 u16 data;
199
200 if (mmio)
201 data = readw((void __iomem *)io_ports->data_addr);
202 else
203 data = inw(io_ports->data_addr);
204
205 tf->data = data & 0xff;
206 tf->hob_data = (data >> 8) & 0xff;
207 }
208
209 /* be sure we're looking at the low order bits */
210 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
211
212 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
213 tf->feature = tf_inb(io_ports->feature_addr);
214 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
215 tf->nsect = tf_inb(io_ports->nsect_addr);
216 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
217 tf->lbal = tf_inb(io_ports->lbal_addr);
218 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
219 tf->lbam = tf_inb(io_ports->lbam_addr);
220 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
221 tf->lbah = tf_inb(io_ports->lbah_addr);
222 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
223 tf->device = tf_inb(io_ports->device_addr);
224
225 if (task->tf_flags & IDE_TFLAG_LBA48) {
226 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
227
228 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
229 tf->hob_feature = tf_inb(io_ports->feature_addr);
230 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
231 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
232 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
233 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
234 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
235 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
236 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
237 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
238 }
239}
240EXPORT_SYMBOL_GPL(ide_tf_read);
241
242/*
243 * Some localbus EIDE interfaces require a special access sequence
244 * when using 32-bit I/O instructions to transfer data. We call this
245 * the "vlb_sync" sequence, which consists of three successive reads
246 * of the sector count register location, with interrupts disabled
247 * to ensure that the reads all happen together.
248 */
249static void ata_vlb_sync(unsigned long port)
250{
251 (void)inb(port);
252 (void)inb(port);
253 (void)inb(port);
254}
255
256/*
257 * This is used for most PIO data transfers *from* the IDE interface
258 *
259 * These routines will round up any request for an odd number of bytes,
260 * so if an odd len is specified, be sure that there's at least one
261 * extra byte allocated for the buffer.
262 */
263void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
264 unsigned int len)
265{
266 ide_hwif_t *hwif = drive->hwif;
267 struct ide_io_ports *io_ports = &hwif->io_ports;
268 unsigned long data_addr = io_ports->data_addr;
269 u8 io_32bit = drive->io_32bit;
270 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
271
272 len++;
273
274 if (io_32bit) {
275 unsigned long uninitialized_var(flags);
276
277 if ((io_32bit & 2) && !mmio) {
278 local_irq_save(flags);
279 ata_vlb_sync(io_ports->nsect_addr);
280 }
281
282 if (mmio)
283 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
284 else
285 insl(data_addr, buf, len / 4);
286
287 if ((io_32bit & 2) && !mmio)
288 local_irq_restore(flags);
289
290 if ((len & 3) >= 2) {
291 if (mmio)
292 __ide_mm_insw((void __iomem *)data_addr,
293 (u8 *)buf + (len & ~3), 1);
294 else
295 insw(data_addr, (u8 *)buf + (len & ~3), 1);
296 }
297 } else {
298 if (mmio)
299 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
300 else
301 insw(data_addr, buf, len / 2);
302 }
303}
304EXPORT_SYMBOL_GPL(ide_input_data);
305
306/*
307 * This is used for most PIO data transfers *to* the IDE interface
308 */
309void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
310 unsigned int len)
311{
312 ide_hwif_t *hwif = drive->hwif;
313 struct ide_io_ports *io_ports = &hwif->io_ports;
314 unsigned long data_addr = io_ports->data_addr;
315 u8 io_32bit = drive->io_32bit;
316 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
317
318 len++;
319
320 if (io_32bit) {
321 unsigned long uninitialized_var(flags);
322
323 if ((io_32bit & 2) && !mmio) {
324 local_irq_save(flags);
325 ata_vlb_sync(io_ports->nsect_addr);
326 }
327
328 if (mmio)
329 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
330 else
331 outsl(data_addr, buf, len / 4);
332
333 if ((io_32bit & 2) && !mmio)
334 local_irq_restore(flags);
335
336 if ((len & 3) >= 2) {
337 if (mmio)
338 __ide_mm_outsw((void __iomem *)data_addr,
339 (u8 *)buf + (len & ~3), 1);
340 else
341 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
342 }
343 } else {
344 if (mmio)
345 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
346 else
347 outsw(data_addr, buf, len / 2);
348 }
349}
350EXPORT_SYMBOL_GPL(ide_output_data);
351
352u8 ide_read_error(ide_drive_t *drive) 53u8 ide_read_error(ide_drive_t *drive)
353{ 54{
354 ide_task_t task; 55 ide_task_t task;
@@ -362,35 +63,6 @@ u8 ide_read_error(ide_drive_t *drive)
362} 63}
363EXPORT_SYMBOL_GPL(ide_read_error); 64EXPORT_SYMBOL_GPL(ide_read_error);
364 65
365void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
366{
367 ide_task_t task;
368
369 memset(&task, 0, sizeof(task));
370 task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
371 IDE_TFLAG_IN_NSECT;
372
373 drive->hwif->tp_ops->tf_read(drive, &task);
374
375 *bcount = (task.tf.lbah << 8) | task.tf.lbam;
376 *ireason = task.tf.nsect & 3;
377}
378EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
379
380const struct ide_tp_ops default_tp_ops = {
381 .exec_command = ide_exec_command,
382 .read_status = ide_read_status,
383 .read_altstatus = ide_read_altstatus,
384
385 .set_irq = ide_set_irq,
386
387 .tf_load = ide_tf_load,
388 .tf_read = ide_tf_read,
389
390 .input_data = ide_input_data,
391 .output_data = ide_output_data,
392};
393
394void ide_fix_driveid(u16 *id) 66void ide_fix_driveid(u16 *id)
395{ 67{
396#ifndef __LITTLE_ENDIAN 68#ifndef __LITTLE_ENDIAN
@@ -412,7 +84,7 @@ void ide_fix_driveid(u16 *id)
412 * returned by the ATA_CMD_ID_ATA[PI] commands. 84 * returned by the ATA_CMD_ID_ATA[PI] commands.
413 */ 85 */
414 86
415void ide_fixstring (u8 *s, const int bytecount, const int byteswap) 87void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
416{ 88{
417 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ 89 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
418 90
@@ -435,44 +107,9 @@ void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
435 while (p != end) 107 while (p != end)
436 *p++ = '\0'; 108 *p++ = '\0';
437} 109}
438
439EXPORT_SYMBOL(ide_fixstring); 110EXPORT_SYMBOL(ide_fixstring);
440 111
441/* 112/*
442 * Needed for PCI irq sharing
443 */
444int drive_is_ready (ide_drive_t *drive)
445{
446 ide_hwif_t *hwif = drive->hwif;
447 u8 stat = 0;
448
449 if (drive->waiting_for_dma)
450 return hwif->dma_ops->dma_test_irq(drive);
451
452 /*
453 * We do a passive status test under shared PCI interrupts on
454 * cards that truly share the ATA side interrupt, but may also share
455 * an interrupt with another pci card/device. We make no assumptions
456 * about possible isa-pnp and pci-pnp issues yet.
457 */
458 if (hwif->io_ports.ctl_addr &&
459 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
460 stat = hwif->tp_ops->read_altstatus(hwif);
461 else
462 /* Note: this may clear a pending IRQ!! */
463 stat = hwif->tp_ops->read_status(hwif);
464
465 if (stat & ATA_BUSY)
466 /* drive busy: definitely not interrupting */
467 return 0;
468
469 /* drive ready: *might* be interrupting */
470 return 1;
471}
472
473EXPORT_SYMBOL(drive_is_ready);
474
475/*
476 * This routine busy-waits for the drive status to be not "busy". 113 * This routine busy-waits for the drive status to be not "busy".
477 * It then checks the status for all of the "good" bits and none 114 * It then checks the status for all of the "good" bits and none
478 * of the "bad" bits, and if all is okay it returns 0. All other 115 * of the "bad" bits, and if all is okay it returns 0. All other
@@ -483,7 +120,8 @@ EXPORT_SYMBOL(drive_is_ready);
483 * setting a timer to wake up at half second intervals thereafter, 120 * setting a timer to wake up at half second intervals thereafter,
484 * until timeout is achieved, before timing out. 121 * until timeout is achieved, before timing out.
485 */ 122 */
486static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) 123static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
124 unsigned long timeout, u8 *rstat)
487{ 125{
488 ide_hwif_t *hwif = drive->hwif; 126 ide_hwif_t *hwif = drive->hwif;
489 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 127 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
@@ -541,7 +179,8 @@ static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long ti
541 * The caller should return the updated value of "startstop" in this case, 179 * The caller should return the updated value of "startstop" in this case,
542 * "startstop" is unchanged when the function returns 0. 180 * "startstop" is unchanged when the function returns 0.
543 */ 181 */
544int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) 182int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
183 u8 bad, unsigned long timeout)
545{ 184{
546 int err; 185 int err;
547 u8 stat; 186 u8 stat;
@@ -561,7 +200,6 @@ int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 ba
561 200
562 return err; 201 return err;
563} 202}
564
565EXPORT_SYMBOL(ide_wait_stat); 203EXPORT_SYMBOL(ide_wait_stat);
566 204
567/** 205/**
@@ -582,7 +220,6 @@ int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
582 return 1; 220 return 1;
583 return 0; 221 return 0;
584} 222}
585
586EXPORT_SYMBOL_GPL(ide_in_drive_list); 223EXPORT_SYMBOL_GPL(ide_in_drive_list);
587 224
588/* 225/*
@@ -607,7 +244,7 @@ static const struct drive_list_entry ivb_list[] = {
607 * All hosts that use the 80c ribbon must use! 244 * All hosts that use the 80c ribbon must use!
608 * The name is derived from upper byte of word 93 and the 80c ribbon. 245 * The name is derived from upper byte of word 93 and the 80c ribbon.
609 */ 246 */
610u8 eighty_ninty_three (ide_drive_t *drive) 247u8 eighty_ninty_three(ide_drive_t *drive)
611{ 248{
612 ide_hwif_t *hwif = drive->hwif; 249 ide_hwif_t *hwif = drive->hwif;
613 u16 *id = drive->id; 250 u16 *id = drive->id;
@@ -652,47 +289,19 @@ no_80w:
652 289
653int ide_driveid_update(ide_drive_t *drive) 290int ide_driveid_update(ide_drive_t *drive)
654{ 291{
655 ide_hwif_t *hwif = drive->hwif;
656 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
657 u16 *id; 292 u16 *id;
658 unsigned long flags; 293 int rc;
659 u8 stat;
660
661 /*
662 * Re-read drive->id for possible DMA mode
663 * change (copied from ide-probe.c)
664 */
665
666 SELECT_MASK(drive, 1);
667 tp_ops->set_irq(hwif, 0);
668 msleep(50);
669 tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
670 294
671 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { 295 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
672 SELECT_MASK(drive, 0); 296 if (id == NULL)
673 return 0; 297 return 0;
674 }
675
676 msleep(50); /* wait for IRQ and ATA_DRQ */
677 stat = tp_ops->read_status(hwif);
678 298
679 if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { 299 SELECT_MASK(drive, 1);
680 SELECT_MASK(drive, 0); 300 rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id);
681 printk("%s: CHECK for good STATUS\n", drive->name);
682 return 0;
683 }
684 local_irq_save(flags);
685 SELECT_MASK(drive, 0); 301 SELECT_MASK(drive, 0);
686 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); 302
687 if (!id) { 303 if (rc)
688 local_irq_restore(flags); 304 goto out_err;
689 return 0;
690 }
691 tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
692 (void)tp_ops->read_status(hwif); /* clear drive IRQ */
693 local_irq_enable();
694 local_irq_restore(flags);
695 ide_fix_driveid(id);
696 305
697 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; 306 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
698 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; 307 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
@@ -705,6 +314,12 @@ int ide_driveid_update(ide_drive_t *drive)
705 ide_dma_off(drive); 314 ide_dma_off(drive);
706 315
707 return 1; 316 return 1;
317out_err:
318 SELECT_MASK(drive, 0);
319 if (rc == 2)
320 printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
321 kfree(id);
322 return 0;
708} 323}
709 324
710int ide_config_drive_speed(ide_drive_t *drive, u8 speed) 325int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
@@ -731,18 +346,15 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
731 * but for some reason these don't work at 346 * but for some reason these don't work at
732 * this point (lost interrupt). 347 * this point (lost interrupt).
733 */ 348 */
734 /* 349
735 * Select the drive, and issue the SETFEATURES command
736 */
737 disable_irq_nosync(hwif->irq);
738
739 /* 350 /*
740 * FIXME: we race against the running IRQ here if 351 * FIXME: we race against the running IRQ here if
741 * this is called from non IRQ context. If we use 352 * this is called from non IRQ context. If we use
742 * disable_irq() we hang on the error path. Work 353 * disable_irq() we hang on the error path. Work
743 * is needed. 354 * is needed.
744 */ 355 */
745 356 disable_irq_nosync(hwif->irq);
357
746 udelay(1); 358 udelay(1);
747 SELECT_DRIVE(drive); 359 SELECT_DRIVE(drive);
748 SELECT_MASK(drive, 1); 360 SELECT_MASK(drive, 1);
@@ -812,8 +424,8 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
812 * 424 *
813 * See also ide_execute_command 425 * See also ide_execute_command
814 */ 426 */
815static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, 427void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
816 unsigned int timeout, ide_expiry_t *expiry) 428 unsigned int timeout, ide_expiry_t *expiry)
817{ 429{
818 ide_hwif_t *hwif = drive->hwif; 430 ide_hwif_t *hwif = drive->hwif;
819 431
@@ -835,9 +447,8 @@ void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
835 __ide_set_handler(drive, handler, timeout, expiry); 447 __ide_set_handler(drive, handler, timeout, expiry);
836 spin_unlock_irqrestore(&hwif->lock, flags); 448 spin_unlock_irqrestore(&hwif->lock, flags);
837} 449}
838
839EXPORT_SYMBOL(ide_set_handler); 450EXPORT_SYMBOL(ide_set_handler);
840 451
841/** 452/**
842 * ide_execute_command - execute an IDE command 453 * ide_execute_command - execute an IDE command
843 * @drive: IDE drive to issue the command against 454 * @drive: IDE drive to issue the command against
@@ -847,7 +458,7 @@ EXPORT_SYMBOL(ide_set_handler);
847 * @expiry: handler to run on timeout 458 * @expiry: handler to run on timeout
848 * 459 *
849 * Helper function to issue an IDE command. This handles the 460 * Helper function to issue an IDE command. This handles the
850 * atomicity requirements, command timing and ensures that the 461 * atomicity requirements, command timing and ensures that the
851 * handler and IRQ setup do not race. All IDE command kick off 462 * handler and IRQ setup do not race. All IDE command kick off
852 * should go via this function or do equivalent locking. 463 * should go via this function or do equivalent locking.
853 */ 464 */
@@ -884,301 +495,6 @@ void ide_execute_pkt_cmd(ide_drive_t *drive)
884} 495}
885EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); 496EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
886 497
887static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
888{
889 struct request *rq = drive->hwif->rq;
890
891 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
892 ide_end_request(drive, err ? err : 1, 0);
893}
894
895/* needed below */
896static ide_startstop_t do_reset1 (ide_drive_t *, int);
897
898/*
899 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
900 * during an atapi drive reset operation. If the drive has not yet responded,
901 * and we have not yet hit our maximum waiting time, then the timer is restarted
902 * for another 50ms.
903 */
904static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
905{
906 ide_hwif_t *hwif = drive->hwif;
907 u8 stat;
908
909 SELECT_DRIVE(drive);
910 udelay (10);
911 stat = hwif->tp_ops->read_status(hwif);
912
913 if (OK_STAT(stat, 0, ATA_BUSY))
914 printk("%s: ATAPI reset complete\n", drive->name);
915 else {
916 if (time_before(jiffies, hwif->poll_timeout)) {
917 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
918 /* continue polling */
919 return ide_started;
920 }
921 /* end of polling */
922 hwif->polling = 0;
923 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
924 drive->name, stat);
925 /* do it the old fashioned way */
926 return do_reset1(drive, 1);
927 }
928 /* done polling */
929 hwif->polling = 0;
930 ide_complete_drive_reset(drive, 0);
931 return ide_stopped;
932}
933
934static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
935{
936 static const char *err_master_vals[] =
937 { NULL, "passed", "formatter device error",
938 "sector buffer error", "ECC circuitry error",
939 "controlling MPU error" };
940
941 u8 err_master = err & 0x7f;
942
943 printk(KERN_ERR "%s: reset: master: ", hwif->name);
944 if (err_master && err_master < 6)
945 printk(KERN_CONT "%s", err_master_vals[err_master]);
946 else
947 printk(KERN_CONT "error (0x%02x?)", err);
948 if (err & 0x80)
949 printk(KERN_CONT "; slave: failed");
950 printk(KERN_CONT "\n");
951}
952
953/*
954 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
955 * during an ide reset operation. If the drives have not yet responded,
956 * and we have not yet hit our maximum waiting time, then the timer is restarted
957 * for another 50ms.
958 */
959static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
960{
961 ide_hwif_t *hwif = drive->hwif;
962 const struct ide_port_ops *port_ops = hwif->port_ops;
963 u8 tmp;
964 int err = 0;
965
966 if (port_ops && port_ops->reset_poll) {
967 err = port_ops->reset_poll(drive);
968 if (err) {
969 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
970 hwif->name, drive->name);
971 goto out;
972 }
973 }
974
975 tmp = hwif->tp_ops->read_status(hwif);
976
977 if (!OK_STAT(tmp, 0, ATA_BUSY)) {
978 if (time_before(jiffies, hwif->poll_timeout)) {
979 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
980 /* continue polling */
981 return ide_started;
982 }
983 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
984 drive->failures++;
985 err = -EIO;
986 } else {
987 tmp = ide_read_error(drive);
988
989 if (tmp == 1) {
990 printk(KERN_INFO "%s: reset: success\n", hwif->name);
991 drive->failures = 0;
992 } else {
993 ide_reset_report_error(hwif, tmp);
994 drive->failures++;
995 err = -EIO;
996 }
997 }
998out:
999 hwif->polling = 0; /* done polling */
1000 ide_complete_drive_reset(drive, err);
1001 return ide_stopped;
1002}
1003
1004static void ide_disk_pre_reset(ide_drive_t *drive)
1005{
1006 int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
1007
1008 drive->special.all = 0;
1009 drive->special.b.set_geometry = legacy;
1010 drive->special.b.recalibrate = legacy;
1011
1012 drive->mult_count = 0;
1013 drive->dev_flags &= ~IDE_DFLAG_PARKED;
1014
1015 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
1016 (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
1017 drive->mult_req = 0;
1018
1019 if (drive->mult_req != drive->mult_count)
1020 drive->special.b.set_multmode = 1;
1021}
1022
1023static void pre_reset(ide_drive_t *drive)
1024{
1025 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1026
1027 if (drive->media == ide_disk)
1028 ide_disk_pre_reset(drive);
1029 else
1030 drive->dev_flags |= IDE_DFLAG_POST_RESET;
1031
1032 if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
1033 if (drive->crc_count)
1034 ide_check_dma_crc(drive);
1035 else
1036 ide_dma_off(drive);
1037 }
1038
1039 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
1040 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
1041 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
1042 drive->io_32bit = 0;
1043 }
1044 return;
1045 }
1046
1047 if (port_ops && port_ops->pre_reset)
1048 port_ops->pre_reset(drive);
1049
1050 if (drive->current_speed != 0xff)
1051 drive->desired_speed = drive->current_speed;
1052 drive->current_speed = 0xff;
1053}
1054
1055/*
1056 * do_reset1() attempts to recover a confused drive by resetting it.
1057 * Unfortunately, resetting a disk drive actually resets all devices on
1058 * the same interface, so it can really be thought of as resetting the
1059 * interface rather than resetting the drive.
1060 *
1061 * ATAPI devices have their own reset mechanism which allows them to be
1062 * individually reset without clobbering other devices on the same interface.
1063 *
1064 * Unfortunately, the IDE interface does not generate an interrupt to let
1065 * us know when the reset operation has finished, so we must poll for this.
1066 * Equally poor, though, is the fact that this may a very long time to complete,
1067 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1068 * we set a timer to poll at 50ms intervals.
1069 */
1070static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1071{
1072 ide_hwif_t *hwif = drive->hwif;
1073 struct ide_io_ports *io_ports = &hwif->io_ports;
1074 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
1075 const struct ide_port_ops *port_ops;
1076 ide_drive_t *tdrive;
1077 unsigned long flags, timeout;
1078 int i;
1079 DEFINE_WAIT(wait);
1080
1081 spin_lock_irqsave(&hwif->lock, flags);
1082
1083 /* We must not reset with running handlers */
1084 BUG_ON(hwif->handler != NULL);
1085
1086 /* For an ATAPI device, first try an ATAPI SRST. */
1087 if (drive->media != ide_disk && !do_not_try_atapi) {
1088 pre_reset(drive);
1089 SELECT_DRIVE(drive);
1090 udelay (20);
1091 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
1092 ndelay(400);
1093 hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
1094 hwif->polling = 1;
1095 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1096 spin_unlock_irqrestore(&hwif->lock, flags);
1097 return ide_started;
1098 }
1099
1100 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
1101 do {
1102 unsigned long now;
1103
1104 prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
1105 timeout = jiffies;
1106 ide_port_for_each_dev(i, tdrive, hwif) {
1107 if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
1108 tdrive->dev_flags & IDE_DFLAG_PARKED &&
1109 time_after(tdrive->sleep, timeout))
1110 timeout = tdrive->sleep;
1111 }
1112
1113 now = jiffies;
1114 if (time_before_eq(timeout, now))
1115 break;
1116
1117 spin_unlock_irqrestore(&hwif->lock, flags);
1118 timeout = schedule_timeout_uninterruptible(timeout - now);
1119 spin_lock_irqsave(&hwif->lock, flags);
1120 } while (timeout);
1121 finish_wait(&ide_park_wq, &wait);
1122
1123 /*
1124 * First, reset any device state data we were maintaining
1125 * for any of the drives on this interface.
1126 */
1127 ide_port_for_each_dev(i, tdrive, hwif)
1128 pre_reset(tdrive);
1129
1130 if (io_ports->ctl_addr == 0) {
1131 spin_unlock_irqrestore(&hwif->lock, flags);
1132 ide_complete_drive_reset(drive, -ENXIO);
1133 return ide_stopped;
1134 }
1135
1136 /*
1137 * Note that we also set nIEN while resetting the device,
1138 * to mask unwanted interrupts from the interface during the reset.
1139 * However, due to the design of PC hardware, this will cause an
1140 * immediate interrupt due to the edge transition it produces.
1141 * This single interrupt gives us a "fast poll" for drives that
1142 * recover from reset very quickly, saving us the first 50ms wait time.
1143 *
1144 * TODO: add ->softreset method and stop abusing ->set_irq
1145 */
1146 /* set SRST and nIEN */
1147 tp_ops->set_irq(hwif, 4);
1148 /* more than enough time */
1149 udelay(10);
1150 /* clear SRST, leave nIEN (unless device is on the quirk list) */
1151 tp_ops->set_irq(hwif, drive->quirk_list == 2);
1152 /* more than enough time */
1153 udelay(10);
1154 hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
1155 hwif->polling = 1;
1156 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1157
1158 /*
1159 * Some weird controller like resetting themselves to a strange
1160 * state when the disks are reset this way. At least, the Winbond
1161 * 553 documentation says that
1162 */
1163 port_ops = hwif->port_ops;
1164 if (port_ops && port_ops->resetproc)
1165 port_ops->resetproc(drive);
1166
1167 spin_unlock_irqrestore(&hwif->lock, flags);
1168 return ide_started;
1169}
1170
1171/*
1172 * ide_do_reset() is the entry point to the drive/interface reset code.
1173 */
1174
1175ide_startstop_t ide_do_reset (ide_drive_t *drive)
1176{
1177 return do_reset1(drive, 0);
1178}
1179
1180EXPORT_SYMBOL(ide_do_reset);
1181
1182/* 498/*
1183 * ide_wait_not_busy() waits for the currently selected device on the hwif 499 * ide_wait_not_busy() waits for the currently selected device on the hwif
1184 * to report a non-busy status, see comments in ide_probe_port(). 500 * to report a non-busy status, see comments in ide_probe_port().
@@ -1187,7 +503,7 @@ int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1187{ 503{
1188 u8 stat = 0; 504 u8 stat = 0;
1189 505
1190 while(timeout--) { 506 while (timeout--) {
1191 /* 507 /*
1192 * Turn this into a schedule() sleep once I'm sure 508 * Turn this into a schedule() sleep once I'm sure
1193 * about locking issues (2.5 work ?). 509 * about locking issues (2.5 work ?).
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-15 12:07:19 -0500