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[SCSI] qla4xxx: use CRB Register for Request Queue in-pointer

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Switching from doorbell mechanism to CRB register based

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: Shyam Sundar <shyam.sundar@qlogic.com>
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Shyam Sundar 2010-10-06 22:50:29 -07:00 committed by James Bottomley
parent 91a772a4b1
commit 2657c800db
5 changed files with 16 additions and 30 deletions
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1
drivers/scsi/qla4xxx/ql4_fw.h
View File

@ -448,6 +448,7 @@ struct addr_ctrl_blk {
#define FWOPT_SESSION_MODE 0x0040
#define FWOPT_INITIATOR_MODE 0x0020
#define FWOPT_TARGET_MODE 0x0010
#define FWOPT_ENABLE_CRBDB 0x8000
uint16_t exec_throttle; /* 04-05 */
uint8_t zio_count; /* 06 */

10
drivers/scsi/qla4xxx/ql4_iocb.c
View File

@ -202,19 +202,11 @@ static void qla4xxx_build_scsi_iocbs(struct srb *srb,
void qla4_8xxx_queue_iocb(struct scsi_qla_host *ha)
{
uint32_t dbval = 0;
unsigned long wtime;
dbval = 0x14 | (ha->func_num << 5);
dbval = dbval | (0 << 8) | (ha->request_in << 16);
writel(dbval, (unsigned long __iomem *)ha->nx_db_wr_ptr);
wmb();
wtime = jiffies + (2 * HZ);
while (readl((void __iomem *)ha->nx_db_rd_ptr) != dbval &&
!time_after_eq(jiffies, wtime)) {
writel(dbval, (unsigned long __iomem *)ha->nx_db_wr_ptr);
wmb();
}
qla4_8xxx_wr_32(ha, ha->nx_db_wr_ptr, ha->request_in);
}
/**

9
drivers/scsi/qla4xxx/ql4_mbx.c
View File

@ -299,6 +299,10 @@ qla4xxx_set_ifcb(struct scsi_qla_host *ha, uint32_t *mbox_cmd,
{
memset(mbox_cmd, 0, sizeof(mbox_cmd[0]) * MBOX_REG_COUNT);
memset(mbox_sts, 0, sizeof(mbox_sts[0]) * MBOX_REG_COUNT);
if (is_qla8022(ha))
qla4_8xxx_wr_32(ha, ha->nx_db_wr_ptr, 0);
mbox_cmd[0] = MBOX_CMD_INITIALIZE_FIRMWARE;
mbox_cmd[1] = 0;
mbox_cmd[2] = LSDW(init_fw_cb_dma);
@ -472,6 +476,11 @@ int qla4xxx_initialize_fw_cb(struct scsi_qla_host * ha)
init_fw_cb->fw_options |=
__constant_cpu_to_le16(FWOPT_SESSION_MODE |
FWOPT_INITIATOR_MODE);
if (is_qla8022(ha))
init_fw_cb->fw_options |=
__constant_cpu_to_le16(FWOPT_ENABLE_CRBDB);
init_fw_cb->fw_options &= __constant_cpu_to_le16(~FWOPT_TARGET_MODE);
if (qla4xxx_set_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma)

2
drivers/scsi/qla4xxx/ql4_nx.h
View File

@ -535,6 +535,8 @@
#define QLA82XX_PEG_HALT_STATUS1 (QLA82XX_CAM_RAM(0xa8))
#define QLA82XX_PEG_HALT_STATUS2 (QLA82XX_CAM_RAM(0xac))
#define QLA82XX_PEG_ALIVE_COUNTER (QLA82XX_CAM_RAM(0xb0))
#define QLA82XX_CAM_RAM_DB1 (QLA82XX_CAM_RAM(0x1b0))
#define QLA82XX_CAM_RAM_DB2 (QLA82XX_CAM_RAM(0x1b4))
#define HALT_STATUS_UNRECOVERABLE 0x80000000
#define HALT_STATUS_RECOVERABLE 0x40000000

24
drivers/scsi/qla4xxx/ql4_os.c
View File

@ -571,10 +571,6 @@ static void qla4xxx_mem_free(struct scsi_qla_host *ha)
if (ha->nx_pcibase)
iounmap(
(struct device_reg_82xx __iomem *)ha->nx_pcibase);
if (ha->nx_db_wr_ptr)
iounmap(
(struct device_reg_82xx __iomem *)ha->nx_db_wr_ptr);
} else if (ha->reg)
iounmap(ha->reg);
pci_release_regions(ha->pdev);
@ -1476,24 +1472,10 @@ int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
db_len = pci_resource_len(pdev, 4);
/* mapping of doorbell write pointer */
ha->nx_db_wr_ptr = (unsigned long)ioremap(db_base +
(ha->pdev->devfn << 12), 4);
if (!ha->nx_db_wr_ptr) {
printk(KERN_ERR
"cannot remap MMIO doorbell-write (%s), aborting\n",
pci_name(pdev));
goto iospace_error_exit;
}
/* mapping of doorbell read pointer */
ha->nx_db_rd_ptr = (uint8_t *) ha->nx_pcibase + (512 * 1024) +
(ha->pdev->devfn * 8);
if (!ha->nx_db_rd_ptr)
printk(KERN_ERR
"cannot remap MMIO doorbell-read (%s), aborting\n",
pci_name(pdev));
return 0;
ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
QLA82XX_CAM_RAM_DB2);
return 0;
iospace_error_exit:
return -ENOMEM;
}