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stex: Add S3/S4 support

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Add S3/S4 support, add .suspend and .resume function in pci_driver.  In
.suspend handler, driver send S3/S4 signal to the device.

Signed-off-by: Charles Chiou <charles.chiou@tw.promise.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Charles 2016-02-22 20:07:09 +08:00 committed by Martin K. Petersen
parent 45b42adbec
commit 797150b98a
1 changed files with 65 additions and 3 deletions
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68
drivers/scsi/stex.c
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@ -167,6 +167,14 @@ enum {
ST_ADDITIONAL_MEM = 0x200000,
ST_ADDITIONAL_MEM_MIN = 0x80000,
PMIC_SHUTDOWN = 0x0D,
PMIC_REUMSE = 0x10,
ST_IGNORED = -1,
ST_NOTHANDLED = 7,
ST_S3 = 3,
ST_S4 = 4,
ST_S5 = 5,
ST_S6 = 6,
};
struct st_sgitem {
@ -1718,7 +1726,7 @@ out_disable:
return err;
}
static void stex_hba_stop(struct st_hba *hba)
static void stex_hba_stop(struct st_hba *hba, int st_sleep_mic)
{
struct req_msg *req;
struct st_msg_header *msg_h;
@ -1727,6 +1735,15 @@ static void stex_hba_stop(struct st_hba *hba)
u16 tag = 0;
spin_lock_irqsave(hba->host->host_lock, flags);
if (hba->cardtype == st_yel && hba->supports_pm == 1)
{
if(st_sleep_mic == ST_NOTHANDLED)
{
spin_unlock_irqrestore(hba->host->host_lock, flags);
return;
}
}
req = hba->alloc_rq(hba);
if (hba->cardtype == st_yel) {
msg_h = (struct st_msg_header *)req - 1;
@ -1734,11 +1751,18 @@ static void stex_hba_stop(struct st_hba *hba)
} else
memset(req, 0, hba->rq_size);
if (hba->cardtype == st_yosemite || hba->cardtype == st_yel) {
if ((hba->cardtype == st_yosemite || hba->cardtype == st_yel)
&& st_sleep_mic == ST_IGNORED) {
req->cdb[0] = MGT_CMD;
req->cdb[1] = MGT_CMD_SIGNATURE;
req->cdb[2] = CTLR_CONFIG_CMD;
req->cdb[3] = CTLR_SHUTDOWN;
} else if (hba->cardtype == st_yel && st_sleep_mic != ST_IGNORED) {
req->cdb[0] = MGT_CMD;
req->cdb[1] = MGT_CMD_SIGNATURE;
req->cdb[2] = CTLR_CONFIG_CMD;
req->cdb[3] = PMIC_SHUTDOWN;
req->cdb[4] = st_sleep_mic;
} else {
req->cdb[0] = CONTROLLER_CMD;
req->cdb[1] = CTLR_POWER_STATE_CHANGE;
@ -1758,10 +1782,12 @@ static void stex_hba_stop(struct st_hba *hba)
while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
hba->ccb[tag].req_type = 0;
hba->mu_status = MU_STATE_STOP;
return;
}
msleep(1);
}
hba->mu_status = MU_STATE_STOP;
}
static void stex_hba_free(struct st_hba *hba)
@ -1801,9 +1827,43 @@ static void stex_shutdown(struct pci_dev *pdev)
{
struct st_hba *hba = pci_get_drvdata(pdev);
stex_hba_stop(hba);
if (hba->supports_pm == 0)
stex_hba_stop(hba, ST_IGNORED);
else
stex_hba_stop(hba, ST_S5);
}
static int stex_choice_sleep_mic(pm_message_t state)
{
switch (state.event) {
case PM_EVENT_SUSPEND:
return ST_S3;
case PM_EVENT_HIBERNATE:
return ST_S4;
default:
return ST_NOTHANDLED;
}
}
static int stex_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct st_hba *hba = pci_get_drvdata(pdev);
if (hba->cardtype == st_yel && hba->supports_pm == 1)
stex_hba_stop(hba, stex_choice_sleep_mic(state));
else
stex_hba_stop(hba, ST_IGNORED);
return 0;
}
static int stex_resume(struct pci_dev *pdev)
{
struct st_hba *hba = pci_get_drvdata(pdev);
hba->mu_status = MU_STATE_STARTING;
stex_handshake(hba);
return 0;
}
MODULE_DEVICE_TABLE(pci, stex_pci_tbl);
static struct pci_driver stex_pci_driver = {
@ -1812,6 +1872,8 @@ static struct pci_driver stex_pci_driver = {
.probe = stex_probe,
.remove = stex_remove,
.shutdown = stex_shutdown,
.suspend = stex_suspend,
.resume = stex_resume,
};
static int __init stex_init(void)