[SCSI] qla2xxx: Export XGMAC statistics on supported ISPs.

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

1 files changed, 57 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 524ceb9b9288..e8c1c9e01a7b 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -692,6 +692,58 @@ static struct bin_attribute sysfs_edc_status_attr = {
         .read = qla2x00_sysfs_read_edc_status,
 };
 
+static ssize_t
+qla2x00_sysfs_read_xgmac_stats(struct kobject *kobj,
+                       struct bin_attribute *bin_attr,
+                       char *buf, loff_t off, size_t count)
+{
+        struct scsi_qla_host *vha = shost_priv(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        struct qla_hw_data *ha = vha->hw;
+        int rval;
+        uint16_t actual_size;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count > XGMAC_DATA_SIZE)
+                return 0;
+
+        if (ha->xgmac_data)
+                goto do_read;
+
+        ha->xgmac_data = dma_alloc_coherent(&ha->pdev->dev, XGMAC_DATA_SIZE,
+            &ha->xgmac_data_dma, GFP_KERNEL);
+        if (!ha->xgmac_data) {
+                qla_printk(KERN_WARNING, ha,
+                    "Unable to allocate memory for XGMAC read-data.\n");
+                return 0;
+        }
+
+do_read:
+        actual_size = 0;
+        memset(ha->xgmac_data, 0, XGMAC_DATA_SIZE);
+
+        rval = qla2x00_get_xgmac_stats(vha, ha->xgmac_data_dma,
+            XGMAC_DATA_SIZE, &actual_size);
+        if (rval != QLA_SUCCESS) {
+                qla_printk(KERN_WARNING, ha,
+                    "Unable to read XGMAC data (%x).\n", rval);
+                count = 0;
+        }
+
+        count = actual_size > count ? count: actual_size;
+        memcpy(buf, ha->xgmac_data, count);
+
+        return count;
+}
+
+static struct bin_attribute sysfs_xgmac_stats_attr = {
+        .attr = {
+                .name = "xgmac_stats",
+                .mode = S_IRUSR,
+        },
+        .size = 0,
+        .read = qla2x00_sysfs_read_xgmac_stats,
+};
+
 static struct sysfs_entry {
         char *name;
         struct bin_attribute *attr;
@@ -706,6 +758,7 @@ static struct sysfs_entry {
         { "reset", &sysfs_reset_attr, },
         { "edc", &sysfs_edc_attr, 2 },
         { "edc_status", &sysfs_edc_status_attr, 2 },
+        { "xgmac_stats", &sysfs_xgmac_stats_attr, 3 },
         { NULL },
 };
 
@@ -721,6 +774,8 @@ qla2x00_alloc_sysfs_attr(scsi_qla_host_t *vha)
                         continue;
                 if (iter->is4GBp_only == 2 && !IS_QLA25XX(vha->hw))
                         continue;
+                if (iter->is4GBp_only == 3 && !IS_QLA81XX(vha->hw))
+                        continue;
 
                 ret = sysfs_create_bin_file(&host->shost_gendev.kobj,
                     iter->attr);
@@ -743,6 +798,8 @@ qla2x00_free_sysfs_attr(scsi_qla_host_t *vha)
                         continue;
                 if (iter->is4GBp_only == 2 && !IS_QLA25XX(ha))
                         continue;
+                if (iter->is4GBp_only == 3 && !IS_QLA81XX(ha))
+                        continue;
 
                 sysfs_remove_bin_file(&host->shost_gendev.kobj,
                     iter->attr);