]>
Commit | Line | Data |
---|---|---|
e2984c62 | 1 | #include <linux/kernel.h> |
5a0e3ad6 | 2 | #include <linux/gfp.h> |
e2984c62 | 3 | #include <linux/ide.h> |
e2984c62 BZ |
4 | |
5 | int generic_ide_suspend(struct device *dev, pm_message_t mesg) | |
6 | { | |
9974e43d | 7 | ide_drive_t *drive = to_ide_device(dev); |
fcb52077 | 8 | ide_drive_t *pair = ide_get_pair_dev(drive); |
898ec223 | 9 | ide_hwif_t *hwif = drive->hwif; |
e2984c62 | 10 | struct request *rq; |
a7928c15 | 11 | struct ide_pm_state rqpm; |
e2984c62 BZ |
12 | int ret; |
13 | ||
2bf427b2 BZ |
14 | if (ide_port_acpi(hwif)) { |
15 | /* call ACPI _GTM only once */ | |
16 | if ((drive->dn & 1) == 0 || pair == NULL) | |
17 | ide_acpi_get_timing(hwif); | |
18 | } | |
e2984c62 BZ |
19 | |
20 | memset(&rqpm, 0, sizeof(rqpm)); | |
aebf526b | 21 | rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM); |
82ed4db4 | 22 | scsi_req_init(rq); |
2f5a8e80 | 23 | ide_req(rq)->type = ATA_PRIV_PM_SUSPEND; |
fc38b521 | 24 | rq->special = &rqpm; |
e2984c62 BZ |
25 | rqpm.pm_step = IDE_PM_START_SUSPEND; |
26 | if (mesg.event == PM_EVENT_PRETHAW) | |
27 | mesg.event = PM_EVENT_FREEZE; | |
28 | rqpm.pm_state = mesg.event; | |
29 | ||
30 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); | |
31 | blk_put_request(rq); | |
32 | ||
2bf427b2 BZ |
33 | if (ret == 0 && ide_port_acpi(hwif)) { |
34 | /* call ACPI _PS3 only after both devices are suspended */ | |
35 | if ((drive->dn & 1) || pair == NULL) | |
36 | ide_acpi_set_state(hwif, 0); | |
37 | } | |
e2984c62 BZ |
38 | |
39 | return ret; | |
40 | } | |
41 | ||
a7928c15 CH |
42 | static void ide_end_sync_rq(struct request *rq, int error) |
43 | { | |
44 | complete(rq->end_io_data); | |
45 | } | |
46 | ||
47 | static int ide_pm_execute_rq(struct request *rq) | |
48 | { | |
49 | struct request_queue *q = rq->q; | |
50 | DECLARE_COMPLETION_ONSTACK(wait); | |
51 | ||
52 | rq->end_io_data = &wait; | |
53 | rq->end_io = ide_end_sync_rq; | |
54 | ||
55 | spin_lock_irq(q->queue_lock); | |
56 | if (unlikely(blk_queue_dying(q))) { | |
e8064021 | 57 | rq->rq_flags |= RQF_QUIET; |
a7928c15 CH |
58 | rq->errors = -ENXIO; |
59 | __blk_end_request_all(rq, rq->errors); | |
60 | spin_unlock_irq(q->queue_lock); | |
61 | return -ENXIO; | |
62 | } | |
63 | __elv_add_request(q, rq, ELEVATOR_INSERT_FRONT); | |
64 | __blk_run_queue_uncond(q); | |
65 | spin_unlock_irq(q->queue_lock); | |
66 | ||
67 | wait_for_completion_io(&wait); | |
68 | ||
69 | return rq->errors ? -EIO : 0; | |
70 | } | |
71 | ||
e2984c62 BZ |
72 | int generic_ide_resume(struct device *dev) |
73 | { | |
9974e43d | 74 | ide_drive_t *drive = to_ide_device(dev); |
fcb52077 | 75 | ide_drive_t *pair = ide_get_pair_dev(drive); |
898ec223 | 76 | ide_hwif_t *hwif = drive->hwif; |
e2984c62 | 77 | struct request *rq; |
a7928c15 | 78 | struct ide_pm_state rqpm; |
e2984c62 BZ |
79 | int err; |
80 | ||
2bf427b2 BZ |
81 | if (ide_port_acpi(hwif)) { |
82 | /* call ACPI _PS0 / _STM only once */ | |
83 | if ((drive->dn & 1) == 0 || pair == NULL) { | |
84 | ide_acpi_set_state(hwif, 1); | |
85 | ide_acpi_push_timing(hwif); | |
86 | } | |
e2984c62 | 87 | |
2bf427b2 BZ |
88 | ide_acpi_exec_tfs(drive); |
89 | } | |
e2984c62 BZ |
90 | |
91 | memset(&rqpm, 0, sizeof(rqpm)); | |
aebf526b | 92 | rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM); |
82ed4db4 | 93 | scsi_req_init(rq); |
2f5a8e80 | 94 | ide_req(rq)->type = ATA_PRIV_PM_RESUME; |
e8064021 | 95 | rq->rq_flags |= RQF_PREEMPT; |
fc38b521 | 96 | rq->special = &rqpm; |
e2984c62 BZ |
97 | rqpm.pm_step = IDE_PM_START_RESUME; |
98 | rqpm.pm_state = PM_EVENT_ON; | |
99 | ||
a7928c15 | 100 | err = ide_pm_execute_rq(rq); |
e2984c62 BZ |
101 | blk_put_request(rq); |
102 | ||
103 | if (err == 0 && dev->driver) { | |
7f3c868b | 104 | struct ide_driver *drv = to_ide_driver(dev->driver); |
e2984c62 BZ |
105 | |
106 | if (drv->resume) | |
107 | drv->resume(drive); | |
108 | } | |
109 | ||
110 | return err; | |
111 | } | |
112 | ||
113 | void ide_complete_power_step(ide_drive_t *drive, struct request *rq) | |
114 | { | |
a7928c15 | 115 | struct ide_pm_state *pm = rq->special; |
e2984c62 BZ |
116 | |
117 | #ifdef DEBUG_PM | |
118 | printk(KERN_INFO "%s: complete_power_step(step: %d)\n", | |
119 | drive->name, pm->pm_step); | |
120 | #endif | |
121 | if (drive->media != ide_disk) | |
122 | return; | |
123 | ||
124 | switch (pm->pm_step) { | |
125 | case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */ | |
126 | if (pm->pm_state == PM_EVENT_FREEZE) | |
127 | pm->pm_step = IDE_PM_COMPLETED; | |
128 | else | |
129 | pm->pm_step = IDE_PM_STANDBY; | |
130 | break; | |
131 | case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ | |
132 | pm->pm_step = IDE_PM_COMPLETED; | |
133 | break; | |
134 | case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */ | |
135 | pm->pm_step = IDE_PM_IDLE; | |
136 | break; | |
137 | case IDE_PM_IDLE: /* Resume step 2 (idle)*/ | |
138 | pm->pm_step = IDE_PM_RESTORE_DMA; | |
139 | break; | |
140 | } | |
141 | } | |
142 | ||
143 | ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq) | |
144 | { | |
a7928c15 | 145 | struct ide_pm_state *pm = rq->special; |
fc38b521 | 146 | struct ide_cmd cmd = { }; |
e2984c62 BZ |
147 | |
148 | switch (pm->pm_step) { | |
149 | case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */ | |
150 | if (drive->media != ide_disk) | |
151 | break; | |
152 | /* Not supported? Switch to next step now. */ | |
153 | if (ata_id_flush_enabled(drive->id) == 0 || | |
154 | (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) { | |
155 | ide_complete_power_step(drive, rq); | |
156 | return ide_stopped; | |
157 | } | |
158 | if (ata_id_flush_ext_enabled(drive->id)) | |
fc38b521 | 159 | cmd.tf.command = ATA_CMD_FLUSH_EXT; |
e2984c62 | 160 | else |
fc38b521 | 161 | cmd.tf.command = ATA_CMD_FLUSH; |
e2984c62 BZ |
162 | goto out_do_tf; |
163 | case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ | |
fc38b521 | 164 | cmd.tf.command = ATA_CMD_STANDBYNOW1; |
e2984c62 BZ |
165 | goto out_do_tf; |
166 | case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */ | |
167 | ide_set_max_pio(drive); | |
168 | /* | |
169 | * skip IDE_PM_IDLE for ATAPI devices | |
170 | */ | |
171 | if (drive->media != ide_disk) | |
172 | pm->pm_step = IDE_PM_RESTORE_DMA; | |
173 | else | |
174 | ide_complete_power_step(drive, rq); | |
175 | return ide_stopped; | |
176 | case IDE_PM_IDLE: /* Resume step 2 (idle) */ | |
fc38b521 | 177 | cmd.tf.command = ATA_CMD_IDLEIMMEDIATE; |
e2984c62 BZ |
178 | goto out_do_tf; |
179 | case IDE_PM_RESTORE_DMA: /* Resume step 3 (restore DMA) */ | |
180 | /* | |
181 | * Right now, all we do is call ide_set_dma(drive), | |
182 | * we could be smarter and check for current xfer_speed | |
183 | * in struct drive etc... | |
184 | */ | |
185 | if (drive->hwif->dma_ops == NULL) | |
186 | break; | |
187 | /* | |
188 | * TODO: respect IDE_DFLAG_USING_DMA | |
189 | */ | |
190 | ide_set_dma(drive); | |
191 | break; | |
192 | } | |
193 | ||
194 | pm->pm_step = IDE_PM_COMPLETED; | |
22aa4b32 | 195 | |
e2984c62 BZ |
196 | return ide_stopped; |
197 | ||
198 | out_do_tf: | |
fc38b521 TH |
199 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
200 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
201 | cmd.protocol = ATA_PROT_NODATA; | |
22aa4b32 | 202 | |
fc38b521 | 203 | return do_rw_taskfile(drive, &cmd); |
e2984c62 BZ |
204 | } |
205 | ||
206 | /** | |
3616b653 | 207 | * ide_complete_pm_rq - end the current Power Management request |
e2984c62 BZ |
208 | * @drive: target drive |
209 | * @rq: request | |
210 | * | |
211 | * This function cleans up the current PM request and stops the queue | |
212 | * if necessary. | |
213 | */ | |
3616b653 | 214 | void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq) |
e2984c62 BZ |
215 | { |
216 | struct request_queue *q = drive->queue; | |
a7928c15 | 217 | struct ide_pm_state *pm = rq->special; |
e2984c62 BZ |
218 | unsigned long flags; |
219 | ||
3616b653 BZ |
220 | ide_complete_power_step(drive, rq); |
221 | if (pm->pm_step != IDE_PM_COMPLETED) | |
222 | return; | |
223 | ||
e2984c62 BZ |
224 | #ifdef DEBUG_PM |
225 | printk("%s: completing PM request, %s\n", drive->name, | |
2f5a8e80 | 226 | (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND) ? "suspend" : "resume"); |
e2984c62 BZ |
227 | #endif |
228 | spin_lock_irqsave(q->queue_lock, flags); | |
2f5a8e80 | 229 | if (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND) |
e2984c62 | 230 | blk_stop_queue(q); |
2ea55210 | 231 | else |
e2984c62 | 232 | drive->dev_flags &= ~IDE_DFLAG_BLOCKED; |
e2984c62 BZ |
233 | spin_unlock_irqrestore(q->queue_lock, flags); |
234 | ||
b65fac32 | 235 | drive->hwif->rq = NULL; |
e2984c62 BZ |
236 | |
237 | if (blk_end_request(rq, 0, 0)) | |
238 | BUG(); | |
239 | } | |
240 | ||
241 | void ide_check_pm_state(ide_drive_t *drive, struct request *rq) | |
242 | { | |
a7928c15 | 243 | struct ide_pm_state *pm = rq->special; |
e2984c62 | 244 | |
aebf526b | 245 | if (blk_rq_is_private(rq) && |
2f5a8e80 | 246 | ide_req(rq)->type == ATA_PRIV_PM_SUSPEND && |
e2984c62 BZ |
247 | pm->pm_step == IDE_PM_START_SUSPEND) |
248 | /* Mark drive blocked when starting the suspend sequence. */ | |
249 | drive->dev_flags |= IDE_DFLAG_BLOCKED; | |
aebf526b | 250 | else if (blk_rq_is_private(rq) && |
2f5a8e80 | 251 | ide_req(rq)->type == ATA_PRIV_PM_RESUME && |
e2984c62 BZ |
252 | pm->pm_step == IDE_PM_START_RESUME) { |
253 | /* | |
254 | * The first thing we do on wakeup is to wait for BSY bit to | |
255 | * go away (with a looong timeout) as a drive on this hwif may | |
256 | * just be POSTing itself. | |
257 | * We do that before even selecting as the "other" device on | |
258 | * the bus may be broken enough to walk on our toes at this | |
259 | * point. | |
260 | */ | |
261 | ide_hwif_t *hwif = drive->hwif; | |
fdd88f0a | 262 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
2ea55210 BZ |
263 | struct request_queue *q = drive->queue; |
264 | unsigned long flags; | |
e2984c62 BZ |
265 | int rc; |
266 | #ifdef DEBUG_PM | |
267 | printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name); | |
268 | #endif | |
269 | rc = ide_wait_not_busy(hwif, 35000); | |
270 | if (rc) | |
271 | printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name); | |
fdd88f0a SS |
272 | tp_ops->dev_select(drive); |
273 | tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); | |
e2984c62 BZ |
274 | rc = ide_wait_not_busy(hwif, 100000); |
275 | if (rc) | |
276 | printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name); | |
2ea55210 BZ |
277 | |
278 | spin_lock_irqsave(q->queue_lock, flags); | |
279 | blk_start_queue(q); | |
280 | spin_unlock_irqrestore(q->queue_lock, flags); | |
e2984c62 BZ |
281 | } |
282 | } |