iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: hisi_sas: Implement handlers of PCIe FLR for v3 hw

Browse Source 
This patch implements handlers of PCIe FLR for v3 hw, reset_prepare() and
reset_done().

User can issue FLR through sysfs interface, as v3 hw support PCIe FLR.
Then if we don't implement these two handlers, our SAS controller will not
work after executing FLR.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiaofei Tan 2018-07-18 22:14:30 +08:00 committed by Martin K. Petersen
parent e8ce775e51
commit e5ea48014a
1 changed files with 37 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
View File

@ -2465,6 +2465,41 @@ static pci_ers_result_t hisi_sas_slot_reset_v3_hw(struct pci_dev *pdev)
return PCI_ERS_RESULT_DISCONNECT;
}
static void hisi_sas_reset_prepare_v3_hw(struct pci_dev *pdev)
{
struct sas_ha_struct *sha = pci_get_drvdata(pdev);
struct hisi_hba *hisi_hba = sha->lldd_ha;
struct device *dev = hisi_hba->dev;
int rc;
dev_info(dev, "FLR prepare\n");
set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
hisi_sas_controller_reset_prepare(hisi_hba);
rc = disable_host_v3_hw(hisi_hba);
if (rc)
dev_err(dev, "FLR: disable host failed rc=%d\n", rc);
}
static void hisi_sas_reset_done_v3_hw(struct pci_dev *pdev)
{
struct sas_ha_struct *sha = pci_get_drvdata(pdev);
struct hisi_hba *hisi_hba = sha->lldd_ha;
struct device *dev = hisi_hba->dev;
int rc;
hisi_sas_init_mem(hisi_hba);
rc = hw_init_v3_hw(hisi_hba);
if (rc) {
dev_err(dev, "FLR: hw init failed rc=%d\n", rc);
return;
}
hisi_sas_controller_reset_done(hisi_hba);
dev_info(dev, "FLR done\n");
}
enum {
/* instances of the controller */
hip08,
@ -2556,6 +2591,8 @@ static const struct pci_error_handlers hisi_sas_err_handler = {
.error_detected = hisi_sas_error_detected_v3_hw,
.mmio_enabled = hisi_sas_mmio_enabled_v3_hw,
.slot_reset = hisi_sas_slot_reset_v3_hw,
.reset_prepare = hisi_sas_reset_prepare_v3_hw,
.reset_done = hisi_sas_reset_done_v3_hw,
};
static struct pci_driver sas_v3_pci_driver = {