[SCSI] qla2xxx: Add reset capabilities for application support.

Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Additional cleanups and
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 117517dcbe44..1f1a7c0e88e7 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -479,6 +479,61 @@ static struct bin_attribute sysfs_sfp_attr = {
         .read = qla2x00_sysfs_read_sfp,
 };
 
+static ssize_t
+qla2x00_sysfs_write_reset(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 type;
+
+        if (off != 0)
+                return 0;
+
+        type = simple_strtol(buf, NULL, 10);
+        switch (type) {
+        case 0x2025c:
+                qla_printk(KERN_INFO, ha,
+                    "Issuing ISP reset on (%ld).\n", vha->host_no);
+
+                scsi_block_requests(vha->host);
+                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+                qla2xxx_wake_dpc(vha);
+                qla2x00_wait_for_chip_reset(vha);
+                scsi_unblock_requests(vha->host);
+                break;
+        case 0x2025d:
+                if (!IS_QLA81XX(ha))
+                        break;
+
+                qla_printk(KERN_INFO, ha,
+                    "Issuing MPI reset on (%ld).\n", vha->host_no);
+
+                /* Make sure FC side is not in reset */
+                qla2x00_wait_for_hba_online(vha);
+
+                /* Issue MPI reset */
+                scsi_block_requests(vha->host);
+                if (qla81xx_restart_mpi_firmware(vha) != QLA_SUCCESS)
+                        qla_printk(KERN_WARNING, ha,
+                            "MPI reset failed on (%ld).\n", vha->host_no);
+                scsi_unblock_requests(vha->host);
+                break;
+        }
+        return count;
+}
+
+static struct bin_attribute sysfs_reset_attr = {
+        .attr = {
+                .name = "reset",
+                .mode = S_IWUSR,
+        },
+        .size = 0,
+        .write = qla2x00_sysfs_write_reset,
+};
+
 static struct sysfs_entry {
         char *name;
         struct bin_attribute *attr;
@@ -490,6 +545,7 @@ static struct sysfs_entry {
         { "optrom_ctl", &sysfs_optrom_ctl_attr, },
         { "vpd", &sysfs_vpd_attr, 1 },
         { "sfp", &sysfs_sfp_attr, 1 },
+        { "reset", &sysfs_reset_attr, },
         { NULL },
 };