[SCSI] qla2xxx: Add DMI (Diagnostics Monitoring Interface) support.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

5 files changed, 121 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 78eec6799343..1a766b284cfc 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -338,6 +338,53 @@ static struct bin_attribute sysfs_vpd_attr = {
         .write = qla2x00_sysfs_write_vpd,
 };
 
+static ssize_t
+qla2x00_sysfs_read_sfp(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        uint16_t iter, addr, offset;
+        int rval;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count != SFP_DEV_SIZE * 2)
+                return 0;
+
+        addr = 0xa0;
+        for (iter = 0, offset = 0; iter < (SFP_DEV_SIZE * 2) / SFP_BLOCK_SIZE;
+            iter++, offset += SFP_BLOCK_SIZE) {
+                if (iter == 4) {
+                        /* Skip to next device address. */
+                        addr = 0xa2;
+                        offset = 0;
+                }
+
+                rval = qla2x00_read_sfp(ha, ha->sfp_data_dma, addr, offset,
+                    SFP_BLOCK_SIZE);
+                if (rval != QLA_SUCCESS) {
+                        qla_printk(KERN_WARNING, ha,
+                            "Unable to read SFP data (%x/%x/%x).\n", rval,
+                            addr, offset);
+                        count = 0;
+                        break;
+                }
+                memcpy(buf, ha->sfp_data, SFP_BLOCK_SIZE);
+                buf += SFP_BLOCK_SIZE;
+        }
+
+        return count;
+}
+
+static struct bin_attribute sysfs_sfp_attr = {
+        .attr = {
+                .name = "sfp",
+                .mode = S_IRUSR | S_IWUSR,
+                .owner = THIS_MODULE,
+        },
+        .size = SFP_DEV_SIZE * 2,
+        .read = qla2x00_sysfs_read_sfp,
+};
+
 void
 qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
 {
@@ -349,6 +396,9 @@ qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
         sysfs_create_bin_file(&host->shost_gendev.kobj,
             &sysfs_optrom_ctl_attr);
         sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_vpd_attr);
+        if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
+                sysfs_create_bin_file(&host->shost_gendev.kobj,
+                    &sysfs_sfp_attr);
 }
 
 void
@@ -362,6 +412,9 @@ qla2x00_free_sysfs_attr(scsi_qla_host_t *ha)
         sysfs_remove_bin_file(&host->shost_gendev.kobj,
             &sysfs_optrom_ctl_attr);
         sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_vpd_attr);
+        if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
+                sysfs_remove_bin_file(&host->shost_gendev.kobj,
+                    &sysfs_sfp_attr);
 
         if (ha->beacon_blink_led == 1)
                 ha->isp_ops.beacon_off(ha);
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index dfcd3a2dd7c1..bb0b5f5e31a5 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -610,6 +610,7 @@ typedef struct {
 #define MBC_GET_TIMEOUT_PARAMS          0x22    /* Get FW timeouts. */
 #define MBC_TRACE_CONTROL               0x27    /* Trace control command. */
 #define MBC_GEN_SYSTEM_ERROR            0x2a    /* Generate System Error. */
+#define MBC_READ_SFP                    0x31    /* Read SFP Data. */
 #define MBC_SET_TIMEOUT_PARAMS          0x32    /* Set FW timeouts. */
 #define MBC_MID_INITIALIZE_FIRMWARE     0x48    /* MID Initialize firmware. */
 #define MBC_MID_GET_VP_DATABASE         0x49    /* MID Get VP Database. */
@@ -2242,6 +2243,11 @@ typedef struct scsi_qla_host {
         struct sns_cmd_pkt      *sns_cmd;
         dma_addr_t              sns_cmd_dma;
 
+#define SFP_DEV_SIZE    256
+#define SFP_BLOCK_SIZE  64
+        void                    *sfp_data;
+        dma_addr_t              sfp_data_dma;
+
         struct task_struct      *dpc_thread;
         uint8_t dpc_active;                  /* DPC routine is active */
 
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index fec1e1c9381f..4edb5d11b775 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -210,6 +210,9 @@ qla2x00_stop_firmware(scsi_qla_host_t *);
 extern int
 qla2x00_trace_control(scsi_qla_host_t *, uint16_t, dma_addr_t, uint16_t);
 
+extern int
+qla2x00_read_sfp(scsi_qla_host_t *, dma_addr_t, uint16_t, uint16_t, uint16_t);
+
 /*
  * Global Function Prototypes in qla_isr.c source file.
  */
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 3b16d6f2ee90..f5e226fc9e35 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -2503,4 +2503,40 @@ qla2x00_trace_control(scsi_qla_host_t *ha, uint16_t ctrl, dma_addr_t eft_dma,
         return rval;
 }
 
+int
+qla2x00_read_sfp(scsi_qla_host_t *ha, dma_addr_t sfp_dma, uint16_t addr,
+    uint16_t off, uint16_t count)
+{
+        int rval;
+        mbx_cmd_t mc;
+        mbx_cmd_t *mcp = &mc;
 
+        if (!IS_QLA24XX(ha) && !IS_QLA54XX(ha))
+                return QLA_FUNCTION_FAILED;
+
+        DEBUG11(printk("%s(%ld): entered.\n", __func__, ha->host_no));
+
+        mcp->mb[0] = MBC_READ_SFP;
+        mcp->mb[1] = addr;
+        mcp->mb[2] = MSW(sfp_dma);
+        mcp->mb[3] = LSW(sfp_dma);
+        mcp->mb[6] = MSW(MSD(sfp_dma));
+        mcp->mb[7] = LSW(MSD(sfp_dma));
+        mcp->mb[8] = count;
+        mcp->mb[9] = off;
+        mcp->mb[10] = 0;
+        mcp->out_mb = MBX_10|MBX_9|MBX_8|MBX_7|MBX_6|MBX_3|MBX_2|MBX_1|MBX_0;
+        mcp->in_mb = MBX_0;
+        mcp->tov = 30;
+        mcp->flags = 0;
+        rval = qla2x00_mailbox_command(ha, mcp);
+
+        if (rval != QLA_SUCCESS) {
+                DEBUG2_3_11(printk("%s(%ld): failed=%x (%x).\n", __func__,
+                    ha->host_no, rval, mcp->mb[0]));
+        } else {
+                DEBUG11(printk("%s(%ld): done.\n", __func__, ha->host_no));
+        }
+
+        return rval;
+}
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index c16154c51298..da84ee2d090b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1979,6 +1979,26 @@ qla2x00_mem_alloc(scsi_qla_host_t *ha)
                                 continue;
                         }
                         memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
+
+                        if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
+                                /*
+                                 * Get consistent memory allocated for SFP
+                                 * block.
+                                 */
+                                ha->sfp_data = dma_pool_alloc(ha->s_dma_pool,
+                                    GFP_KERNEL, &ha->sfp_data_dma);
+                                if (ha->sfp_data == NULL) {
+                                        qla_printk(KERN_WARNING, ha,
+                                            "Memory Allocation failed - "
+                                            "sfp_data\n");
+
+                                        qla2x00_mem_free(ha);
+                                        msleep(100);
+
+                                        continue;
+                                }
+                                memset(ha->sfp_data, 0, SFP_BLOCK_SIZE);
+                        }
                 }
 
                 /* Done all allocations without any error. */
@@ -2034,6 +2054,9 @@ qla2x00_mem_free(scsi_qla_host_t *ha)
                 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
                     ha->ct_sns, ha->ct_sns_dma);
 
+        if (ha->sfp_data)
+                dma_pool_free(ha->s_dma_pool, ha->sfp_data, ha->sfp_data_dma);
+
         if (ha->ms_iocb)
                 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);