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scsi: stex: Add S6 support 

1. Add reboot notifier and register it in stex_probe for all supported
   device.

2. For all supported device in restart flow, we get a callback from
   notifier and set S6flag for stex_shutdown & stex_hba_stop to send
   restart command to FW.

Signed-off-by: Charles.Chiou <charles.chiou@tw.promise.com>
Signed-off-by: Paul.Lyu <paul.lyu@tw.promise.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Charles 2017-02-17 10:52:38 +08:00 committed by Martin K. Petersen
parent d65702272c
commit 61b745fa63
1 changed files with 23 additions and 2 deletions
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25
drivers/scsi/stex.c
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@ -26,6 +26,7 @@
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/ktime.h>
#include <linux/reboot.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
@ -362,6 +363,12 @@ struct st_card_info {
u16 sts_count;
};
int S6flag;
static int stex_halt(struct notifier_block *nb, ulong event, void *buf);
static struct notifier_block stex_notifier = {
stex_halt, NULL, 0
};
static int msi;
module_param(msi, int, 0);
MODULE_PARM_DESC(msi, "Enable Message Signaled Interrupts(0=off, 1=on)");
@ -1673,6 +1680,9 @@ static int stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pci_set_master(pdev);
S6flag = 0;
register_reboot_notifier(&stex_notifier);
host = scsi_host_alloc(&driver_template, sizeof(struct st_hba));
if (!host) {
@ -1947,15 +1957,20 @@ static void stex_remove(struct pci_dev *pdev)
scsi_host_put(hba->host);
pci_disable_device(pdev);
unregister_reboot_notifier(&stex_notifier);
}
static void stex_shutdown(struct pci_dev *pdev)
{
struct st_hba *hba = pci_get_drvdata(pdev);
if (hba->supports_pm == 0)
if (hba->supports_pm == 0) {
stex_hba_stop(hba, ST_IGNORED);
else
} else if (hba->supports_pm == 1 && S6flag) {
unregister_reboot_notifier(&stex_notifier);
stex_hba_stop(hba, ST_S6);
} else
stex_hba_stop(hba, ST_S5);
}
@ -1992,6 +2007,12 @@ static int stex_resume(struct pci_dev *pdev)
stex_handshake(hba);
return 0;
}
static int stex_halt(struct notifier_block *nb, unsigned long event, void *buf)
{
S6flag = 1;
return NOTIFY_OK;
}
MODULE_DEVICE_TABLE(pci, stex_pci_tbl);
static struct pci_driver stex_pci_driver = {