[SCSI] qla2xxx: Read capture firmware dump on mailbox timeout for ISP8044 and ISP82XX.

Allow for the capture of a firmware dump but have a sysfs node
(allow_cna_fw_dump) to allow the feature to be enabled/disabled dynamically.

The default is off.

Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -1503,6 +1503,37 @@ qla2x00_fw_dump_size_show(struct device *dev, struct device_attribute *attr,
 	return scnprintf(buf, PAGE_SIZE, "%d\n", size);
 }
 
+static ssize_t
+qla2x00_allow_cna_fw_dump_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
+
+	if (!IS_P3P_TYPE(vha->hw))
+		return scnprintf(buf, PAGE_SIZE, "\n");
+	else
+		return scnprintf(buf, PAGE_SIZE, "%s\n",
+		    vha->hw->allow_cna_fw_dump ? "true" : "false");
+}
+
+static ssize_t
+qla2x00_allow_cna_fw_dump_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
+	int val = 0;
+
+	if (!IS_P3P_TYPE(vha->hw))
+		return -EINVAL;
+
+	if (sscanf(buf, "%d", &val) != 1)
+		return -EINVAL;
+
+	vha->hw->allow_cna_fw_dump = val != 0;
+
+	return strlen(buf);
+}
+
 static DEVICE_ATTR(driver_version, S_IRUGO, qla2x00_drvr_version_show, NULL);
 static DEVICE_ATTR(fw_version, S_IRUGO, qla2x00_fw_version_show, NULL);
 static DEVICE_ATTR(serial_num, S_IRUGO, qla2x00_serial_num_show, NULL);
@@ -1544,6 +1575,9 @@ static DEVICE_ATTR(thermal_temp, S_IRUGO, qla2x00_thermal_temp_show, NULL);
 static DEVICE_ATTR(diag_requests, S_IRUGO, qla2x00_diag_requests_show, NULL);
 static DEVICE_ATTR(diag_megabytes, S_IRUGO, qla2x00_diag_megabytes_show, NULL);
 static DEVICE_ATTR(fw_dump_size, S_IRUGO, qla2x00_fw_dump_size_show, NULL);
+static DEVICE_ATTR(allow_cna_fw_dump, S_IRUGO | S_IWUSR,
+		   qla2x00_allow_cna_fw_dump_show,
+		   qla2x00_allow_cna_fw_dump_store);
 
 struct device_attribute *qla2x00_host_attrs[] = {
 	&dev_attr_driver_version,
@@ -1576,6 +1610,7 @@ struct device_attribute *qla2x00_host_attrs[] = {
 	&dev_attr_diag_requests,
 	&dev_attr_diag_megabytes,
 	&dev_attr_fw_dump_size,
+	&dev_attr_allow_cna_fw_dump,
 	NULL,
 };
 

drivers/scsi/qla2xxx/qla_def.h

@@ -3301,6 +3301,7 @@ struct qla_hw_data {
 	struct mr_data_fx00 mr;
 
 	struct qlt_hw_data tgt;
+	int	allow_cna_fw_dump;
 };
 
 /*

drivers/scsi/qla2xxx/qla_gbl.h

@@ -511,6 +511,8 @@ extern void qla2300_fw_dump(scsi_qla_host_t *, int);
 extern void qla24xx_fw_dump(scsi_qla_host_t *, int);
 extern void qla25xx_fw_dump(scsi_qla_host_t *, int);
 extern void qla81xx_fw_dump(scsi_qla_host_t *, int);
+extern void qla82xx_fw_dump(scsi_qla_host_t *, int);
+extern void qla8044_fw_dump(scsi_qla_host_t *, int);
 
 extern void qla27xx_fwdump(scsi_qla_host_t *, int);
 extern ulong qla27xx_fwdt_calculate_dump_size(struct scsi_qla_host *);

drivers/scsi/qla2xxx/qla_nx.c

@@ -4502,3 +4502,20 @@ exit:
 	qla82xx_idc_unlock(ha);
 	return rval;
 }
+
+void
+qla82xx_fw_dump(scsi_qla_host_t *vha, int hardware_locked)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	if (!ha->allow_cna_fw_dump)
+		return;
+
+	scsi_block_requests(vha->host);
+	ha->flags.isp82xx_no_md_cap = 1;
+	qla82xx_idc_lock(ha);
+	qla82xx_set_reset_owner(vha);
+	qla82xx_idc_unlock(ha);
+	qla2x00_wait_for_chip_reset(vha);
+	scsi_unblock_requests(vha->host);
+}

drivers/scsi/qla2xxx/qla_nx2.c

@@ -3713,3 +3713,19 @@ exit_isp_reset:
 	return rval;
 }
 
+void
+qla8044_fw_dump(scsi_qla_host_t *vha, int hardware_locked)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	if (!ha->allow_cna_fw_dump)
+		return;
+
+	scsi_block_requests(vha->host);
+	ha->flags.isp82xx_no_md_cap = 1;
+	qla8044_idc_lock(ha);
+	qla82xx_set_reset_owner(vha);
+	qla8044_idc_unlock(ha);
+	qla2x00_wait_for_chip_reset(vha);
+	scsi_unblock_requests(vha->host);
+}

drivers/scsi/qla2xxx/qla_os.c

@@ -1975,7 +1975,7 @@ static struct isp_operations qla82xx_isp_ops = {
 	.prep_ms_fdmi_iocb	= qla24xx_prep_ms_fdmi_iocb,
 	.read_nvram		= qla24xx_read_nvram_data,
 	.write_nvram		= qla24xx_write_nvram_data,
-	.fw_dump		= qla24xx_fw_dump,
+	.fw_dump		= qla82xx_fw_dump,
 	.beacon_on		= qla82xx_beacon_on,
 	.beacon_off		= qla82xx_beacon_off,
 	.beacon_blink		= NULL,
@@ -2013,7 +2013,7 @@ static struct isp_operations qla8044_isp_ops = {
 	.prep_ms_fdmi_iocb	= qla24xx_prep_ms_fdmi_iocb,
 	.read_nvram		= NULL,
 	.write_nvram		= NULL,
-	.fw_dump		= qla24xx_fw_dump,
+	.fw_dump		= qla8044_fw_dump,
 	.beacon_on		= qla82xx_beacon_on,
 	.beacon_off		= qla82xx_beacon_off,
 	.beacon_blink		= NULL,