From 72f5b5cbda424a254b0e9672bd4d9d249728fcb9 Mon Sep 17 00:00:00 2001
From: Charles Chiou <charles.chiou@xxxxxxxxxxxxxx>
Date: Wed, 5 Nov 2014 19:29:46 +0800
Subject: [PATCH 3/4] scsi:stex.c Add reboot support
1. Add reboot support, Pegasus devices should be notified that
the host is going to shut down/reboot. I register reboot callback
function to distinct host is going to shut down or to reboot.
2. Pegasus FW shutdown flow is sensitive to host behavior
(host is going to S3/S4/shut down/reboot). To this end, I add one
argument in stex_hba_stop to support various stop command.
Signed-off-by: charles.chiou@xxxxxxxxxxxxxx
---
drivers/scsi/stex.c | 46 ++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 42 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 7dc6afe..a536cfb 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -24,6 +24,7 @@
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/module.h>
+#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -166,6 +167,13 @@ 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 {
@@ -344,6 +352,7 @@ struct st_card_info {
u16 sts_count;
};
+static int reboot;
static int msi;
module_param(msi, int, 0);
MODULE_PARM_DESC(msi, "Enable Message Signaled Interrupts(0=off, 1=on)");
@@ -364,6 +373,14 @@ MODULE_AUTHOR("Ed Lin");
MODULE_DESCRIPTION("Promise Technology SuperTrak EX Controllers");
MODULE_LICENSE("GPL");
MODULE_VERSION(ST_DRIVER_VERSION);
+static int stex_reboot_callback(struct notifier_block *self,
+ unsigned long val,
+ void *data)
+{
+ if (val == SYS_RESTART)
+ reboot = 1;
+ return NOTIFY_OK;
+}
static void stex_gettime(__le64 *time)
{
@@ -1562,6 +1579,7 @@ static int stex_probe(struct pci_dev *pdev, const
struct pci_device_id *id)
u32 sts_offset, cp_offset, scratch_offset;
int err;
+ reboot = 0;
err = pci_enable_device(pdev);
if (err)
return err;
@@ -1755,7 +1773,7 @@ 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;
@@ -1771,11 +1789,18 @@ 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;
@@ -1795,10 +1820,12 @@ 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)
@@ -1838,7 +1865,14 @@ 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 {
+ if (reboot)
+ stex_hba_stop(hba, ST_S6);
+ else
+ stex_hba_stop(hba, ST_S5);
+ }
}
MODULE_DEVICE_TABLE(pci, stex_pci_tbl);
@@ -1851,18 +1885,22 @@ static struct pci_driver stex_pci_driver = {
.shutdown = stex_shutdown,
};
+static struct notifier_block stex_reboot_notifier = {
+ stex_reboot_callback, NULL, 0
+};
static int __init stex_init(void)
{
printk(KERN_INFO DRV_NAME
": Promise SuperTrak EX Driver version: %s\n",
ST_DRIVER_VERSION);
-
+ register_reboot_notifier(&stex_reboot_notifier);
return pci_register_driver(&stex_pci_driver);
}
static void __exit stex_exit(void)
{
pci_unregister_driver(&stex_pci_driver);
+ unregister_reboot_notifier(&stex_reboot_notifier);
}
module_init(stex_init);
--
1.9.1
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