ipr: AF DASD raw mode implementation in ipr driver
This patch implements raw mode support for AF DASD in ipr driver
which allows for tools to send commands directly to physical
devices which are members of RAID arrays when enabled in the firmware.
[jejb: fix up whitespace]
Signed-off-by: Wen Xiong<wenxiong@linux.vnet.ibm.com>
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Reviewed-by: Daniel Kreling <kreling@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index a9a464c..3128407 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -498,6 +498,10 @@
"4061: Multipath redundancy level got better"},
{0x066B9200, 0, IPR_DEFAULT_LOG_LEVEL,
"4060: Multipath redundancy level got worse"},
+ {0x06808100, 0, IPR_DEFAULT_LOG_LEVEL,
+ "9083: Device raw mode enabled"},
+ {0x06808200, 0, IPR_DEFAULT_LOG_LEVEL,
+ "9084: Device raw mode disabled"},
{0x07270000, 0, 0,
"Failure due to other device"},
{0x07278000, 0, IPR_DEFAULT_LOG_LEVEL,
@@ -4496,11 +4500,83 @@
.show = ipr_show_resource_type
};
+/**
+ * ipr_show_raw_mode - Show the adapter's raw mode
+ * @dev: class device struct
+ * @buf: buffer
+ *
+ * Return value:
+ * number of bytes printed to buffer
+ **/
+static ssize_t ipr_show_raw_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
+ struct ipr_resource_entry *res;
+ unsigned long lock_flags = 0;
+ ssize_t len;
+
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ res = (struct ipr_resource_entry *)sdev->hostdata;
+ if (res)
+ len = snprintf(buf, PAGE_SIZE, "%d\n", res->raw_mode);
+ else
+ len = -ENXIO;
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ return len;
+}
+
+/**
+ * ipr_store_raw_mode - Change the adapter's raw mode
+ * @dev: class device struct
+ * @buf: buffer
+ *
+ * Return value:
+ * number of bytes printed to buffer
+ **/
+static ssize_t ipr_store_raw_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
+ struct ipr_resource_entry *res;
+ unsigned long lock_flags = 0;
+ ssize_t len;
+
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ res = (struct ipr_resource_entry *)sdev->hostdata;
+ if (res) {
+ if (ioa_cfg->sis64 && ipr_is_af_dasd_device(res)) {
+ res->raw_mode = simple_strtoul(buf, NULL, 10);
+ len = strlen(buf);
+ if (res->sdev)
+ sdev_printk(KERN_INFO, res->sdev, "raw mode is %s\n",
+ res->raw_mode ? "enabled" : "disabled");
+ } else
+ len = -EINVAL;
+ } else
+ len = -ENXIO;
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ return len;
+}
+
+static struct device_attribute ipr_raw_mode_attr = {
+ .attr = {
+ .name = "raw_mode",
+ .mode = S_IRUGO | S_IWUSR,
+ },
+ .show = ipr_show_raw_mode,
+ .store = ipr_store_raw_mode
+};
+
static struct device_attribute *ipr_dev_attrs[] = {
&ipr_adapter_handle_attr,
&ipr_resource_path_attr,
&ipr_device_id_attr,
&ipr_resource_type_attr,
+ &ipr_raw_mode_attr,
NULL,
};
@@ -6152,6 +6228,13 @@
break;
case IPR_IOASC_NR_INIT_CMD_REQUIRED:
break;
+ case IPR_IOASC_IR_NON_OPTIMIZED:
+ if (res->raw_mode) {
+ res->raw_mode = 0;
+ scsi_cmd->result |= (DID_IMM_RETRY << 16);
+ } else
+ scsi_cmd->result |= (DID_ERROR << 16);
+ break;
default:
if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
scsi_cmd->result |= (DID_ERROR << 16);
@@ -6291,6 +6374,8 @@
(!ipr_is_gscsi(res) || scsi_cmd->cmnd[0] == IPR_QUERY_RSRC_STATE)) {
ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
}
+ if (res->raw_mode && ipr_is_af_dasd_device(res))
+ ioarcb->cmd_pkt.request_type = IPR_RQTYPE_PIPE;
if (ioa_cfg->sis64)
rc = ipr_build_ioadl64(ioa_cfg, ipr_cmd);