- 根目录:
- drivers
- ide
- ide-pm.c
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/ide.h>
int generic_ide_suspend(struct device *dev, pm_message_t mesg)
{
ide_drive_t *drive = dev_get_drvdata(dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
struct request_pm_state rqpm;
int ret;
if (ide_port_acpi(hwif)) {
if ((drive->dn & 1) == 0 || pair == NULL)
ide_acpi_get_timing(hwif);
}
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_PM_SUSPEND;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
mesg.event = PM_EVENT_FREEZE;
rqpm.pm_state = mesg.event;
ret = blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
if (ret == 0 && ide_port_acpi(hwif)) {
if ((drive->dn & 1) || pair == NULL)
ide_acpi_set_state(hwif, 0);
}
return ret;
}
int generic_ide_resume(struct device *dev)
{
ide_drive_t *drive = dev_get_drvdata(dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
struct request_pm_state rqpm;
int err;
if (ide_port_acpi(hwif)) {
if ((drive->dn & 1) == 0 || pair == NULL) {
ide_acpi_set_state(hwif, 1);
ide_acpi_push_timing(hwif);
}
ide_acpi_exec_tfs(drive);
}
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_PM_RESUME;
rq->cmd_flags |= REQ_PREEMPT;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_RESUME;
rqpm.pm_state = PM_EVENT_ON;
err = blk_execute_rq(drive->queue, NULL, rq, 1);
blk_put_request(rq);
if (err == 0 && dev->driver) {
struct ide_driver *drv = to_ide_driver(dev->driver);
if (drv->resume)
drv->resume(drive);
}
return err;
}
void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
{
struct request_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
drive->name, pm->pm_step);
#endif
if (drive->media != ide_disk)
return;
switch (pm->pm_step) {
case IDE_PM_FLUSH_CACHE:
if (pm->pm_state == PM_EVENT_FREEZE)
pm->pm_step = IDE_PM_COMPLETED;
else
pm->pm_step = IDE_PM_STANDBY;
break;
case IDE_PM_STANDBY:
pm->pm_step = IDE_PM_COMPLETED;
break;
case IDE_PM_RESTORE_PIO:
pm->pm_step = IDE_PM_IDLE;
break;
case IDE_PM_IDLE:
pm->pm_step = IDE_PM_RESTORE_DMA;
break;
}
}
ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
{
struct request_pm_state *pm = rq->special;
struct ide_cmd cmd = { };
switch (pm->pm_step) {
case IDE_PM_FLUSH_CACHE:
if (drive->media != ide_disk)
break;
if (ata_id_flush_enabled(drive->id) == 0 ||
(drive->dev_flags & IDE_DFLAG_WCACHE) == 0) {
ide_complete_power_step(drive, rq);
return ide_stopped;
}
if (ata_id_flush_ext_enabled(drive->id))
cmd.tf.command = ATA_CMD_FLUSH_EXT;
else
cmd.tf.command = ATA_CMD_FLUSH;
goto out_do_tf;
case IDE_PM_STANDBY:
cmd.tf.command = ATA_CMD_STANDBYNOW1;
goto out_do_tf;
case IDE_PM_RESTORE_PIO:
ide_set_max_pio(drive);
if (drive->media != ide_disk)
pm->pm_step = IDE_PM_RESTORE_DMA;
else
ide_complete_power_step(drive, rq);
return ide_stopped;
case IDE_PM_IDLE:
cmd.tf.command = ATA_CMD_IDLEIMMEDIATE;
goto out_do_tf;
case IDE_PM_RESTORE_DMA:
if (drive->hwif->dma_ops == NULL)
break;
ide_set_dma(drive);
break;
}
pm->pm_step = IDE_PM_COMPLETED;
return ide_stopped;
out_do_tf:
cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
cmd.protocol = ATA_PROT_NODATA;
return do_rw_taskfile(drive, &cmd);
}
void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
{
struct request_queue *q = drive->queue;
struct request_pm_state *pm = rq->special;
unsigned long flags;
ide_complete_power_step(drive, rq);
if (pm->pm_step != IDE_PM_COMPLETED)
return;
#ifdef DEBUG_PM
printk("%s: completing PM request, %s\n", drive->name,
(rq->cmd_type == REQ_TYPE_PM_SUSPEND) ? "suspend" : "resume");
#endif
spin_lock_irqsave(q->queue_lock, flags);
if (rq->cmd_type == REQ_TYPE_PM_SUSPEND)
blk_stop_queue(q);
else
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
spin_unlock_irqrestore(q->queue_lock, flags);
drive->hwif->rq = NULL;
if (blk_end_request(rq, 0, 0))
BUG();
}
void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
{
struct request_pm_state *pm = rq->special;
if (rq->cmd_type == REQ_TYPE_PM_SUSPEND &&
pm->pm_step == IDE_PM_START_SUSPEND)
drive->dev_flags |= IDE_DFLAG_BLOCKED;
else if (rq->cmd_type == REQ_TYPE_PM_RESUME &&
pm->pm_step == IDE_PM_START_RESUME) {
ide_hwif_t *hwif = drive->hwif;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
struct request_queue *q = drive->queue;
unsigned long flags;
int rc;
#ifdef DEBUG_PM
printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);
#endif
rc = ide_wait_not_busy(hwif, 35000);
if (rc)
printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);
tp_ops->dev_select(drive);
tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
rc = ide_wait_not_busy(hwif, 100000);
if (rc)
printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
spin_lock_irqsave(q->queue_lock, flags);
blk_start_queue(q);
spin_unlock_irqrestore(q->queue_lock, flags);
}
}
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156
- 157
- 158
- 159
- 160
- 161
- 162
- 163
- 164
- 165
- 166
- 167
- 168
- 169
- 170
- 171
- 172
- 173
- 174
- 175
- 176
- 177
- 178
- 179
- 180
- 181
- 182
- 183
- 184
- 185
- 186
- 187
- 188
- 189
- 190
- 191
- 192
- 193
- 194
- 195
- 196
- 197
- 198
- 199
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 211
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
- 227
- 228
- 229
- 230
- 231
- 232
- 233
- 234
- 235
- 236
- 237
- 238
- 239
- 240
- 241
- 242
- 243
- 244
- 245
- 246
- 247
- 248