[SCSI] qla4xxx: use CRB Register for Request Queue in-pointer
Shyam Sundar [Thu, 7 Oct 2010 05:50:29 +0000 (22:50 -0700)]
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>

drivers/scsi/qla4xxx/ql4_fw.h
drivers/scsi/qla4xxx/ql4_iocb.c
drivers/scsi/qla4xxx/ql4_mbx.c
drivers/scsi/qla4xxx/ql4_nx.h
drivers/scsi/qla4xxx/ql4_os.c

index d65dac4..5e757d7 100644 (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 */
index 4ef9ba1..5ae49fd 100644 (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);
 }
 
 /**
index 494a28f..2d2f9c8 100644 (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)
index 931ad3f..95f3060 100644 (file)
 #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
index 57890b6..779745f 100644 (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;
 }