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path: root/drivers/s390/scsi/zfcp_scsi.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_scsi.c')
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c103
1 files changed, 90 insertions, 13 deletions
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index be5d2c60453d..cb000c9833bb 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -12,6 +12,7 @@
#include <linux/types.h>
#include <linux/slab.h>
#include <scsi/fc/fc_fcp.h>
+#include <scsi/scsi_eh.h>
#include <asm/atomic.h>
#include "zfcp_ext.h"
#include "zfcp_dbf.h"
@@ -22,6 +23,13 @@ static unsigned int default_depth = 32;
module_param_named(queue_depth, default_depth, uint, 0600);
MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
+static bool enable_dif;
+
+#ifdef CONFIG_ZFCP_DIF
+module_param_named(dif, enable_dif, bool, 0600);
+MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support");
+#endif
+
static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
int reason)
{
@@ -506,8 +514,10 @@ static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
* @rport: The FC rport where to teminate I/O
*
* Abort all pending SCSI commands for a port by closing the
- * port. Using a reopen avoiding a conflict with a shutdown
- * overwriting a reopen.
+ * port. Using a reopen avoids a conflict with a shutdown
+ * overwriting a reopen. The "forced" ensures that a disappeared port
+ * is not opened again as valid due to the cached plogi data in
+ * non-NPIV mode.
*/
static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
{
@@ -519,11 +529,25 @@ static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
if (port) {
- zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
+ zfcp_erp_port_forced_reopen(port, 0, "sctrpi1", NULL);
put_device(&port->dev);
}
}
+static void zfcp_scsi_queue_unit_register(struct zfcp_port *port)
+{
+ struct zfcp_unit *unit;
+
+ read_lock_irq(&port->unit_list_lock);
+ list_for_each_entry(unit, &port->unit_list, list) {
+ get_device(&unit->dev);
+ if (scsi_queue_work(port->adapter->scsi_host,
+ &unit->scsi_work) <= 0)
+ put_device(&unit->dev);
+ }
+ read_unlock_irq(&port->unit_list_lock);
+}
+
static void zfcp_scsi_rport_register(struct zfcp_port *port)
{
struct fc_rport_identifiers ids;
@@ -548,6 +572,9 @@ static void zfcp_scsi_rport_register(struct zfcp_port *port)
rport->maxframe_size = port->maxframe_size;
rport->supported_classes = port->supported_classes;
port->rport = rport;
+ port->starget_id = rport->scsi_target_id;
+
+ zfcp_scsi_queue_unit_register(port);
}
static void zfcp_scsi_rport_block(struct zfcp_port *port)
@@ -610,24 +637,74 @@ void zfcp_scsi_rport_work(struct work_struct *work)
put_device(&port->dev);
}
-
-void zfcp_scsi_scan(struct work_struct *work)
+/**
+ * zfcp_scsi_scan - Register LUN with SCSI midlayer
+ * @unit: The LUN/unit to register
+ */
+void zfcp_scsi_scan(struct zfcp_unit *unit)
{
- struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
- scsi_work);
- struct fc_rport *rport;
-
- flush_work(&unit->port->rport_work);
- rport = unit->port->rport;
+ struct fc_rport *rport = unit->port->rport;
if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
scsilun_to_int((struct scsi_lun *)
&unit->fcp_lun), 0);
+}
+void zfcp_scsi_scan_work(struct work_struct *work)
+{
+ struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
+ scsi_work);
+
+ zfcp_scsi_scan(unit);
put_device(&unit->dev);
}
+/**
+ * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
+ * @adapter: The adapter where to configure DIF/DIX for the SCSI host
+ */
+void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
+{
+ unsigned int mask = 0;
+ unsigned int data_div;
+ struct Scsi_Host *shost = adapter->scsi_host;
+
+ data_div = atomic_read(&adapter->status) &
+ ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
+
+ if (enable_dif &&
+ adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
+ mask |= SHOST_DIF_TYPE1_PROTECTION;
+
+ if (enable_dif && data_div &&
+ adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
+ mask |= SHOST_DIX_TYPE1_PROTECTION;
+ scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
+ shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2;
+ shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2;
+ }
+
+ scsi_host_set_prot(shost, mask);
+}
+
+/**
+ * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
+ * @scmd: The SCSI command to report the error for
+ * @ascq: The ASCQ to put in the sense buffer
+ *
+ * See the error handling in sd_done for the sense codes used here.
+ * Set DID_SOFT_ERROR to retry the request, if possible.
+ */
+void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
+{
+ scsi_build_sense_buffer(1, scmd->sense_buffer,
+ ILLEGAL_REQUEST, 0x10, ascq);
+ set_driver_byte(scmd, DRIVER_SENSE);
+ scmd->result |= SAM_STAT_CHECK_CONDITION;
+ set_host_byte(scmd, DID_SOFT_ERROR);
+}
+
struct fc_function_template zfcp_transport_functions = {
.show_starget_port_id = 1,
.show_starget_port_name = 1,
@@ -677,11 +754,11 @@ struct zfcp_data zfcp_data = {
.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
.can_queue = 4096,
.this_id = -1,
- .sg_tablesize = ZFCP_FSF_MAX_SBALES_PER_REQ,
+ .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ,
.cmd_per_lun = 1,
.use_clustering = 1,
.sdev_attrs = zfcp_sysfs_sdev_attrs,
- .max_sectors = (ZFCP_FSF_MAX_SBALES_PER_REQ * 8),
+ .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8),
.dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
.shost_attrs = zfcp_sysfs_shost_attrs,
},