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scsi: hisi_sas: relocate some common code for v3 hw

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Much code of PM suspend function also exists in soft reset function. This
is not concise. So, this patch relocates the common code of these two
functions to a separate function.

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 22:14:29 +08:00 committed by Martin K. Petersen
parent 4522204ab2
commit e8ce775e51
1 changed files with 27 additions and 23 deletions
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50
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
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@ -210,6 +210,8 @@
#define AXI_MASTER_CFG_BASE (0x5000)
#define AM_CTRL_GLOBAL (0x0)
#define AM_CTRL_SHUTDOWN_REQ_OFF 0
#define AM_CTRL_SHUTDOWN_REQ_MSK (0x1 << AM_CTRL_SHUTDOWN_REQ_OFF)
#define AM_CURR_TRANS_RETURN (0x150)
#define AM_CFG_MAX_TRANS (0x5010)
@ -1976,11 +1978,11 @@ static void phy_get_events_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
}
static int soft_reset_v3_hw(struct hisi_hba *hisi_hba)
static int disable_host_v3_hw(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
u32 status, reg_val;
int rc;
u32 status;
interrupt_disable_v3_hw(hisi_hba);
hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0x0);
@ -1990,14 +1992,32 @@ static int soft_reset_v3_hw(struct hisi_hba *hisi_hba)
mdelay(10);
hisi_sas_write32(hisi_hba, AXI_MASTER_CFG_BASE + AM_CTRL_GLOBAL, 0x1);
reg_val = hisi_sas_read32(hisi_hba, AXI_MASTER_CFG_BASE +
AM_CTRL_GLOBAL);
reg_val |= AM_CTRL_SHUTDOWN_REQ_MSK;
hisi_sas_write32(hisi_hba, AXI_MASTER_CFG_BASE +
AM_CTRL_GLOBAL, reg_val);
/* wait until bus idle */
rc = hisi_sas_read32_poll_timeout(AXI_MASTER_CFG_BASE +
AM_CURR_TRANS_RETURN, status,
status == 0x3, 10, 100);
if (rc) {
dev_err(dev, "axi bus is not idle, rc = %d\n", rc);
dev_err(dev, "axi bus is not idle, rc=%d\n", rc);
return rc;
}
return 0;
}
static int soft_reset_v3_hw(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
int rc;
rc = disable_host_v3_hw(hisi_hba);
if (rc) {
dev_err(dev, "soft reset: disable host failed rc=%d\n", rc);
return rc;
}
@ -2456,9 +2476,8 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
struct hisi_hba *hisi_hba = sha->lldd_ha;
struct device *dev = hisi_hba->dev;
struct Scsi_Host *shost = hisi_hba->shost;
u32 device_state, status;
u32 device_state;
int rc;
u32 reg_val;
if (!pdev->pm_cap) {
dev_err(dev, "PCI PM not supported\n");
@ -2471,25 +2490,10 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
scsi_block_requests(shost);
set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
flush_workqueue(hisi_hba->wq);
/* disable DQ/PHY/bus */
interrupt_disable_v3_hw(hisi_hba);
hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0x0);
hisi_sas_kill_tasklets(hisi_hba);
hisi_sas_stop_phys(hisi_hba);
reg_val = hisi_sas_read32(hisi_hba, AXI_MASTER_CFG_BASE +
AM_CTRL_GLOBAL);
reg_val |= 0x1;
hisi_sas_write32(hisi_hba, AXI_MASTER_CFG_BASE +
AM_CTRL_GLOBAL, reg_val);
/* wait until bus idle */
rc = hisi_sas_read32_poll_timeout(AXI_MASTER_CFG_BASE +
AM_CURR_TRANS_RETURN, status,
status == 0x3, 10, 100);
rc = disable_host_v3_hw(hisi_hba);
if (rc) {
dev_err(dev, "axi bus is not idle, rc = %d\n", rc);
dev_err(dev, "PM suspend: disable host failed rc=%d\n", rc);
clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
scsi_unblock_requests(shost);