Messages in this thread Patch in this message | | | Date | Thu, 04 Feb 2016 19:22:59 +0800 | From | Charles Chiou <> | Subject | [Resend PATCH 3/3] scsi:stex.c Add S3/S4 support |
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From f442518879f8f41d103b684046d912eca13844e7 Mon Sep 17 00:00:00 2001 From: Charles <charles.chiou@tw.promise.com> Date: Wed, 2 Sep 2015 20:54:45 +0800 Subject: [PATCH 3/3] scsi:stex.c Add S3/S4 support
Add S3/S4 support, add .suspend and .resume function in pci_driver. In .suspend handler, driver send S3/S4 signal to the device.
V2: Remove blank lines
Signed-off-by: Charles Chiou <charles.chiou@tw.promise.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--- drivers/scsi/stex.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 56 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c index 4ef0c80..c96a86d 100644 --- a/drivers/scsi/stex.c +++ b/drivers/scsi/stex.c @@ -166,6 +166,13 @@ enum {
ST_ADDITIONAL_MEM = 0x200000, ST_ADDITIONAL_MEM_MIN = 0x80000, + PMIC_SHUTDOWN = 0x0D, + PMIC_REUMSE = 0x10, + ST_IGNORED = -1, + ST_S3 = 3, + ST_S4 = 4, + ST_S5 = 5, + ST_S6 = 6, };
struct st_sgitem { @@ -1733,7 +1740,7 @@ 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; @@ -1749,11 +1756,18 @@ 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; @@ -1773,10 +1787,12 @@ 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) @@ -1816,9 +1832,44 @@ 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_FREEZE: + case PM_EVENT_HIBERNATE: + return ST_S4; + default: + return ST_S4; + } +} + +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 = { @@ -1827,6 +1878,8 @@ 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)
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