[SCSI] qla2xxx: Export TLV data on supported ISPs.

Firmware currently provides PB and PGF TLVs.

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

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index e8c1c9e01a7b..9aa00f25aa6a 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -744,6 +744,57 @@ static struct bin_attribute sysfs_xgmac_stats_attr = {
         .read = qla2x00_sysfs_read_xgmac_stats,
 };
 
+static ssize_t
+qla2x00_sysfs_read_dcbx_tlv(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 > DCBX_TLV_DATA_SIZE)
+                return 0;
+
+        if (ha->dcbx_tlv)
+                goto do_read;
+
+        ha->dcbx_tlv = dma_alloc_coherent(&ha->pdev->dev, DCBX_TLV_DATA_SIZE,
+            &ha->dcbx_tlv_dma, GFP_KERNEL);
+        if (!ha->dcbx_tlv) {
+                qla_printk(KERN_WARNING, ha,
+                    "Unable to allocate memory for DCBX TLV read-data.\n");
+                return 0;
+        }
+
+do_read:
+        actual_size = 0;
+        memset(ha->dcbx_tlv, 0, DCBX_TLV_DATA_SIZE);
+
+        rval = qla2x00_get_dcbx_params(vha, ha->dcbx_tlv_dma,
+            DCBX_TLV_DATA_SIZE);
+        if (rval != QLA_SUCCESS) {
+                qla_printk(KERN_WARNING, ha,
+                    "Unable to read DCBX TLV data (%x).\n", rval);
+                count = 0;
+        }
+
+        memcpy(buf, ha->dcbx_tlv, count);
+
+        return count;
+}
+
+static struct bin_attribute sysfs_dcbx_tlv_attr = {
+        .attr = {
+                .name = "dcbx_tlv",
+                .mode = S_IRUSR,
+        },
+        .size = 0,
+        .read = qla2x00_sysfs_read_dcbx_tlv,
+};
+
 static struct sysfs_entry {
         char *name;
         struct bin_attribute *attr;
@@ -759,6 +810,7 @@ static struct sysfs_entry {
         { "edc", &sysfs_edc_attr, 2 },
         { "edc_status", &sysfs_edc_status_attr, 2 },
         { "xgmac_stats", &sysfs_xgmac_stats_attr, 3 },
+        { "dcbx_tlv", &sysfs_dcbx_tlv_attr, 3 },
         { NULL },
 };