qla2xxx: Added interface to send explicit LOGO.

This patch adds interface to send explicit LOGO
explicit LOGO using using ELS commands from driver.

Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 6b942d9..6992ebc 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -824,6 +824,41 @@
 };
 
 static ssize_t
+qla2x00_issue_logo(struct file *filp, 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)));
+	int type;
+	int rval = 0;
+	port_id_t did;
+
+	type = simple_strtol(buf, NULL, 10);
+
+	did.b.domain = (type & 0x00ff0000) >> 16;
+	did.b.area = (type & 0x0000ff00) >> 8;
+	did.b.al_pa = (type & 0x000000ff);
+
+	ql_log(ql_log_info, vha, 0x70e3, "portid=%02x%02x%02x done\n",
+	    did.b.domain, did.b.area, did.b.al_pa);
+
+	ql_log(ql_log_info, vha, 0x70e4, "%s: %d\n", __func__, type);
+
+	rval = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, did);
+	return count;
+}
+
+static struct bin_attribute sysfs_issue_logo_attr = {
+	.attr = {
+		.name = "issue_logo",
+		.mode = S_IWUSR,
+	},
+	.size = 0,
+	.write = qla2x00_issue_logo,
+};
+
+static ssize_t
 qla2x00_sysfs_read_xgmac_stats(struct file *filp, struct kobject *kobj,
 		       struct bin_attribute *bin_attr,
 		       char *buf, loff_t off, size_t count)
@@ -937,6 +972,7 @@
 	{ "vpd", &sysfs_vpd_attr, 1 },
 	{ "sfp", &sysfs_sfp_attr, 1 },
 	{ "reset", &sysfs_reset_attr, },
+	{ "issue_logo", &sysfs_issue_logo_attr, },
 	{ "xgmac_stats", &sysfs_xgmac_stats_attr, 3 },
 	{ "dcbx_tlv", &sysfs_dcbx_tlv_attr, 3 },
 	{ NULL },