Skip to content

Commit

Permalink
ipr: AF DASD raw mode implementation in ipr driver
Browse files Browse the repository at this point in the history 
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>
  • Loading branch information
Wen Xiong authored and James Bottomley committed Apr 9, 2015
1 parent ea30c1d commit f8ee25d
Show file tree
Hide file tree
Showing 2 changed files with 88 additions and 0 deletions.
85 changes: 85 additions & 0 deletions drivers/scsi/ipr.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -498,6 +498,10 @@ struct ipr_error_table_t ipr_error_table[] = {
"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,
Expand Down Expand Up @@ -4496,11 +4500,83 @@ static struct device_attribute ipr_resource_type_attr = {
.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,
};

Expand Down Expand Up @@ -6152,6 +6228,13 @@ static void ipr_erp_start(struct ipr_ioa_cfg *ioa_cfg,
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);
Expand Down Expand Up @@ -6291,6 +6374,8 @@ static int ipr_queuecommand(struct Scsi_Host *shost,
(!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);
Expand Down
3 changes: 3 additions & 0 deletions drivers/scsi/ipr.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,7 @@
#define IPR_IOASC_BUS_WAS_RESET 0x06290000
#define IPR_IOASC_BUS_WAS_RESET_BY_OTHER 0x06298000
#define IPR_IOASC_ABORTED_CMD_TERM_BY_HOST 0x0B5A0000
#define IPR_IOASC_IR_NON_OPTIMIZED 0x05258200

#define IPR_FIRST_DRIVER_IOASC 0x10000000
#define IPR_IOASC_IOA_WAS_RESET 0x10000001
Expand Down Expand Up @@ -521,6 +522,7 @@ struct ipr_cmd_pkt {
#define IPR_RQTYPE_IOACMD 0x01
#define IPR_RQTYPE_HCAM 0x02
#define IPR_RQTYPE_ATA_PASSTHRU 0x04
#define IPR_RQTYPE_PIPE 0x05

u8 reserved2;

Expand Down Expand Up @@ -1274,6 +1276,7 @@ struct ipr_resource_entry {
u8 del_from_ml:1;
u8 resetting_device:1;
u8 reset_occurred:1;
u8 raw_mode:1;

u32 bus; /* AKA channel */
u32 target; /* AKA id */
Expand Down

0 comments on commit f8ee25d

Please sign in to comment.