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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-25 05:37:53 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-25 05:37:53 +0300
commit6f2689a7662809ff39f2b24e452d11569c21ea2f (patch)
tree6dfbfd3feb4d77a66bf06f246640ae4ed321bbb2 /include/scsi
parentb1f8ccdaae0310332d16f65bf0f622f9d4ae2391 (diff)
parent66daf3e6b9936328cb28eaaa29dddfe96343cc85 (diff)
downloadlinux-6f2689a7662809ff39f2b24e452d11569c21ea2f.tar.xz
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley: "This series consists of the usual driver updates (qla2xxx, pm8001, libsas, smartpqi, scsi_debug, lpfc, iscsi, mpi3mr) plus minor updates and bug fixes. The high blast radius core update is the removal of write same, which affects block and several non-SCSI devices. The other big change, which is more local, is the removal of the SCSI pointer" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (281 commits) scsi: scsi_ioctl: Drop needless assignment in sg_io() scsi: bsg: Drop needless assignment in scsi_bsg_sg_io_fn() scsi: lpfc: Copyright updates for 14.2.0.0 patches scsi: lpfc: Update lpfc version to 14.2.0.0 scsi: lpfc: SLI path split: Refactor BSG paths scsi: lpfc: SLI path split: Refactor Abort paths scsi: lpfc: SLI path split: Refactor SCSI paths scsi: lpfc: SLI path split: Refactor CT paths scsi: lpfc: SLI path split: Refactor misc ELS paths scsi: lpfc: SLI path split: Refactor VMID paths scsi: lpfc: SLI path split: Refactor FDISC paths scsi: lpfc: SLI path split: Refactor LS_RJT paths scsi: lpfc: SLI path split: Refactor LS_ACC paths scsi: lpfc: SLI path split: Refactor the RSCN/SCR/RDF/EDC/FARPR paths scsi: lpfc: SLI path split: Refactor PLOGI/PRLI/ADISC/LOGO paths scsi: lpfc: SLI path split: Refactor base ELS paths and the FLOGI path scsi: lpfc: SLI path split: Introduce lpfc_prep_wqe scsi: lpfc: SLI path split: Refactor fast and slow paths to native SLI4 scsi: lpfc: SLI path split: Refactor lpfc_iocbq scsi: lpfc: Use kcalloc() ...
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/fc/fc_ms.h4
-rw-r--r--include/scsi/libfc.h9
-rw-r--r--include/scsi/libiscsi.h13
-rw-r--r--include/scsi/libsas.h56
-rw-r--r--include/scsi/sas.h9
-rw-r--r--include/scsi/sas_ata.h14
-rw-r--r--include/scsi/scsi_cmnd.h31
-rw-r--r--include/scsi/scsi_device.h1
-rw-r--r--include/scsi/scsi_eh.h4
-rw-r--r--include/scsi/scsi_host.h3
-rw-r--r--include/scsi/scsi_request.h31
-rw-r--r--include/scsi/scsi_transport_iscsi.h9
-rw-r--r--include/scsi/viosrp.h17
13 files changed, 121 insertions, 80 deletions
diff --git a/include/scsi/fc/fc_ms.h b/include/scsi/fc/fc_ms.h
index 00191695233a..56a5d2b5a624 100644
--- a/include/scsi/fc/fc_ms.h
+++ b/include/scsi/fc/fc_ms.h
@@ -158,7 +158,7 @@ struct fc_fdmi_port_name {
struct fc_fdmi_attr_entry {
__be16 type;
__be16 len;
- __u8 value[1];
+ __u8 value[];
} __attribute__((__packed__));
/*
@@ -166,7 +166,7 @@ struct fc_fdmi_attr_entry {
*/
struct fs_fdmi_attrs {
__be32 numattrs;
- struct fc_fdmi_attr_entry attr[1];
+ struct fc_fdmi_attr_entry attr[];
} __attribute__((__packed__));
/*
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index eeb8d689ff6b..6e29e1719db1 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -352,6 +352,15 @@ struct fc_fcp_pkt {
} ____cacheline_aligned_in_smp;
/*
+ * @fsp should be tested and set under the scsi_pkt_queue lock
+ */
+struct libfc_cmd_priv {
+ struct fc_fcp_pkt *fsp;
+ u32 resid_len;
+ u8 status;
+};
+
+/*
* Structure and function definitions for managing Fibre Channel Exchanges
* and Sequences
*
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 4ee233e5a6ff..e76c94697c1b 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -19,6 +19,7 @@
#include <linux/refcount.h>
#include <scsi/iscsi_proto.h>
#include <scsi/iscsi_if.h>
+#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport_iscsi.h>
struct scsi_transport_template;
@@ -152,6 +153,17 @@ static inline bool iscsi_task_is_completed(struct iscsi_task *task)
task->state == ISCSI_TASK_ABRT_SESS_RECOV;
}
+/* Private data associated with struct scsi_cmnd. */
+struct iscsi_cmd {
+ struct iscsi_task *task;
+ int age;
+};
+
+static inline struct iscsi_cmd *iscsi_cmd(struct scsi_cmnd *cmd)
+{
+ return scsi_cmd_priv(cmd);
+}
+
/* Connection's states */
enum {
ISCSI_CONN_INITIAL_STAGE,
@@ -371,7 +383,6 @@ struct iscsi_host {
int state;
struct workqueue_struct *workq;
- char workq_name[20];
};
/*
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 698f2032807b..ff04eb6d250b 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -492,7 +492,6 @@ enum exec_status {
SAS_INTERRUPTED,
SAS_QUEUE_FULL,
SAS_DEVICE_UNKNOWN,
- SAS_SG_ERR,
SAS_OPEN_REJECT,
SAS_OPEN_TO,
SAS_PROTO_RESPONSE,
@@ -553,6 +552,21 @@ struct sas_ata_task {
u8 stp_affil_pol:1;
u8 device_control_reg_update:1;
+
+ bool force_phy;
+ int force_phy_id;
+};
+
+/* LLDDs rely on these values */
+enum sas_internal_abort {
+ SAS_INTERNAL_ABORT_SINGLE = 0,
+ SAS_INTERNAL_ABORT_DEV = 1,
+};
+
+struct sas_internal_abort_task {
+ enum sas_internal_abort type;
+ unsigned int qid;
+ u16 tag;
};
struct sas_smp_task {
@@ -577,6 +591,11 @@ struct sas_ssp_task {
struct scsi_cmnd *cmd;
};
+struct sas_tmf_task {
+ u8 tmf;
+ u16 tag_of_task_to_be_managed;
+};
+
struct sas_task {
struct domain_device *dev;
@@ -589,6 +608,7 @@ struct sas_task {
struct sas_ata_task ata_task;
struct sas_smp_task smp_task;
struct sas_ssp_task ssp_task;
+ struct sas_internal_abort_task abort_task;
};
struct scatterlist *scatter;
@@ -602,6 +622,7 @@ struct sas_task {
void *lldd_task; /* for use by LLDDs */
void *uldd_task;
struct sas_task_slow *slow_task;
+ struct sas_tmf_task *tmf;
};
struct sas_task_slow {
@@ -617,12 +638,16 @@ struct sas_task_slow {
#define SAS_TASK_STATE_DONE 2
#define SAS_TASK_STATE_ABORTED 4
#define SAS_TASK_NEED_DEV_RESET 8
-#define SAS_TASK_AT_INITIATOR 16
extern struct sas_task *sas_alloc_task(gfp_t flags);
extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
extern void sas_free_task(struct sas_task *task);
+static inline bool sas_is_internal_abort(struct sas_task *task)
+{
+ return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT;
+}
+
struct sas_domain_function_template {
/* The class calls these to notify the LLDD of an event. */
void (*lldd_port_formed)(struct asd_sas_phy *);
@@ -637,7 +662,6 @@ struct sas_domain_function_template {
/* Task Management Functions. Must be called from process context. */
int (*lldd_abort_task)(struct sas_task *);
int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
- int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
int (*lldd_I_T_nexus_reset)(struct domain_device *);
int (*lldd_ata_check_ready)(struct domain_device *);
@@ -645,6 +669,11 @@ struct sas_domain_function_template {
int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
int (*lldd_query_task)(struct sas_task *);
+ /* Special TMF callbacks */
+ void (*lldd_tmf_exec_complete)(struct domain_device *dev);
+ void (*lldd_tmf_aborted)(struct sas_task *task);
+ bool (*lldd_abort_timeout)(struct sas_task *task, void *data);
+
/* Port and Adapter management */
int (*lldd_clear_nexus_port)(struct asd_sas_port *);
int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
@@ -673,6 +702,11 @@ extern int sas_slave_configure(struct scsi_device *);
extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
extern int sas_bios_param(struct scsi_device *, struct block_device *,
sector_t capacity, int *hsc);
+int sas_execute_internal_abort_single(struct domain_device *device,
+ u16 tag, unsigned int qid,
+ void *data);
+int sas_execute_internal_abort_dev(struct domain_device *device,
+ unsigned int qid, void *data);
extern struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *);
extern struct device_attribute dev_attr_phy_event_threshold;
@@ -685,7 +719,7 @@ int sas_ex_revalidate_domain(struct domain_device *);
void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
-int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
+void sas_discover_event(struct asd_sas_port *, enum discover_event ev);
int sas_discover_sata(struct domain_device *);
int sas_discover_end_dev(struct domain_device *);
@@ -711,9 +745,15 @@ struct sas_phy *sas_get_local_phy(struct domain_device *dev);
int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
-int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
- gfp_t gfp_flags);
-int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
- gfp_t gfp_flags);
+int sas_abort_task_set(struct domain_device *dev, u8 *lun);
+int sas_clear_task_set(struct domain_device *dev, u8 *lun);
+int sas_lu_reset(struct domain_device *dev, u8 *lun);
+int sas_query_task(struct sas_task *task, u16 tag);
+int sas_abort_task(struct sas_task *task, u16 tag);
+
+void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
+ gfp_t gfp_flags);
+void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
+ gfp_t gfp_flags);
#endif /* _SASLIB_H_ */
diff --git a/include/scsi/sas.h b/include/scsi/sas.h
index 64154c1fed02..acfc69fd72d0 100644
--- a/include/scsi/sas.h
+++ b/include/scsi/sas.h
@@ -95,6 +95,8 @@ enum sas_protocol {
SAS_PROTOCOL_SSP = 0x08,
SAS_PROTOCOL_ALL = 0x0E,
SAS_PROTOCOL_STP_ALL = SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA,
+ /* these are internal to libsas */
+ SAS_PROTOCOL_INTERNAL_ABORT = 0x10,
};
/* From the spec; local phys only */
@@ -191,6 +193,13 @@ enum sas_gpio_reg_type {
SAS_GPIO_REG_TX_GP = 4,
};
+/* Response frame DATAPRES field */
+enum {
+ SAS_DATAPRES_NO_DATA = 0,
+ SAS_DATAPRES_RESPONSE_DATA = 1,
+ SAS_DATAPRES_SENSE_DATA = 2,
+};
+
struct dev_to_host_fis {
u8 fis_type; /* 0x34 */
u8 flags;
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index 416c9c47d0e7..d47dea70855d 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -25,14 +25,15 @@ int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy);
int sas_ata_init(struct domain_device *dev);
void sas_ata_task_abort(struct sas_task *task);
void sas_ata_strategy_handler(struct Scsi_Host *shost);
-void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
- struct list_head *done_q);
+void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q);
void sas_ata_schedule_reset(struct domain_device *dev);
void sas_ata_wait_eh(struct domain_device *dev);
void sas_probe_sata(struct asd_sas_port *port);
void sas_suspend_sata(struct asd_sas_port *port);
void sas_resume_sata(struct asd_sas_port *port);
void sas_ata_end_eh(struct ata_port *ap);
+int sas_execute_ata_cmd(struct domain_device *device, u8 *fis,
+ int force_phy_id);
#else
@@ -52,8 +53,7 @@ static inline void sas_ata_strategy_handler(struct Scsi_Host *shost)
{
}
-static inline void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
- struct list_head *done_q)
+static inline void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q)
{
}
@@ -85,6 +85,12 @@ static inline int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy
static inline void sas_ata_end_eh(struct ata_port *ap)
{
}
+
+static inline int sas_execute_ata_cmd(struct domain_device *device, u8 *fis,
+ int force_phy_id)
+{
+ return 0;
+}
#endif
#endif /* _SAS_ATA_H_ */
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index e3a4c67794b1..1e80e70dfa92 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -10,7 +10,6 @@
#include <linux/timer.h>
#include <linux/scatterlist.h>
#include <scsi/scsi_device.h>
-#include <scsi/scsi_request.h>
struct Scsi_Host;
@@ -27,9 +26,6 @@ struct Scsi_Host;
* supports without specifying a cmd_len by ULD's
*/
#define MAX_COMMAND_SIZE 16
-#if (MAX_COMMAND_SIZE > BLK_MAX_CDB)
-# error MAX_COMMAND_SIZE can not be bigger than BLK_MAX_CDB
-#endif
struct scsi_data_buffer {
struct sg_table table;
@@ -70,7 +66,6 @@ enum scsi_cmnd_submitter {
} __packed;
struct scsi_cmnd {
- struct scsi_request req;
struct scsi_device *device;
struct list_head eh_entry; /* entry for the host eh_abort_list/eh_cmd_q */
struct delayed_work abort_work;
@@ -99,9 +94,7 @@ struct scsi_cmnd {
unsigned short cmd_len;
enum dma_data_direction sc_data_direction;
- /* These elements define the operation we are about to perform */
- unsigned char *cmnd;
-
+ unsigned char cmnd[32]; /* SCSI CDB */
/* These elements define the operation we ultimately want to perform */
struct scsi_data_buffer sdb;
@@ -115,18 +108,23 @@ struct scsi_cmnd {
(ie, between disconnect /
reconnects. Probably == sector
size */
-
+ unsigned resid_len; /* residual count */
+ unsigned sense_len;
unsigned char *sense_buffer;
/* obtained by REQUEST SENSE when
* CHECK CONDITION is received on original
* command (auto-sense). Length must be
* SCSI_SENSE_BUFFERSIZE bytes. */
+ int flags; /* Command flags */
+ unsigned long state; /* Command completion state */
+
+ unsigned int extra_len; /* length of alignment and padding */
+
/*
- * The following fields can be written to by the host specific code.
- * Everything else should be left alone.
+ * The fields below can be modified by the LLD but the fields above
+ * must not be modified.
*/
- struct scsi_pointer SCp; /* Scratchpad used by some host adapters */
unsigned char *host_scribble; /* The host adapter is allowed to
* call scsi_malloc and get some memory
@@ -137,10 +135,6 @@ struct scsi_cmnd {
* to be at an address < 16Mb). */
int result; /* Status code from lower level driver */
- int flags; /* Command flags */
- unsigned long state; /* Command completion state */
-
- unsigned int extra_len; /* length of alignment and padding */
};
/* Variant of blk_mq_rq_from_pdu() that verifies the type of its argument. */
@@ -159,6 +153,7 @@ static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd)
}
void scsi_done(struct scsi_cmnd *cmd);
+void scsi_done_direct(struct scsi_cmnd *cmd);
extern void scsi_finish_command(struct scsi_cmnd *cmd);
@@ -194,12 +189,12 @@ static inline unsigned scsi_bufflen(struct scsi_cmnd *cmd)
static inline void scsi_set_resid(struct scsi_cmnd *cmd, unsigned int resid)
{
- cmd->req.resid_len = resid;
+ cmd->resid_len = resid;
}
static inline unsigned int scsi_get_resid(struct scsi_cmnd *cmd)
{
- return cmd->req.resid_len;
+ return cmd->resid_len;
}
#define scsi_for_each_sg(cmd, sg, nseg, __i) \
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 647c53b26105..57e3e239a1fc 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -206,6 +206,7 @@ struct scsi_device {
unsigned rpm_autosuspend:1; /* Enable runtime autosuspend at device
* creation time */
unsigned ignore_media_change:1; /* Ignore MEDIA CHANGE on resume */
+ unsigned silence_suspend:1; /* Do not print runtime PM related messages */
unsigned int queue_stopped; /* request queue is quiesced */
bool offline_already; /* Device offline message logged */
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h
index 468094254b3c..1ae08e81339f 100644
--- a/include/scsi/scsi_eh.h
+++ b/include/scsi/scsi_eh.h
@@ -38,10 +38,8 @@ struct scsi_eh_save {
unsigned underflow;
unsigned char cmd_len;
unsigned char prot_op;
- unsigned char *cmnd;
+ unsigned char cmnd[32];
struct scsi_data_buffer sdb;
- /* new command support */
- unsigned char eh_cmnd[BLK_MAX_CDB];
struct scatterlist sense_sgl;
};
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 72e1a347baa6..667d889b92b5 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -16,7 +16,6 @@ struct completion;
struct module;
struct scsi_cmnd;
struct scsi_device;
-struct scsi_host_cmd_pool;
struct scsi_target;
struct Scsi_Host;
struct scsi_transport_template;
@@ -493,8 +492,6 @@ struct scsi_host_template {
*/
u64 vendor_id;
- struct scsi_host_cmd_pool *cmd_pool;
-
/* Delay for runtime autosuspend */
int rpm_autosuspend_delay;
};
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h
deleted file mode 100644
index 9129b23e12bc..000000000000
--- a/include/scsi/scsi_request.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _SCSI_SCSI_REQUEST_H
-#define _SCSI_SCSI_REQUEST_H
-
-#include <linux/blk-mq.h>
-
-#define BLK_MAX_CDB 16
-
-struct scsi_request {
- unsigned char __cmd[BLK_MAX_CDB];
- unsigned char *cmd;
- unsigned short cmd_len;
- int result;
- unsigned int sense_len;
- unsigned int resid_len; /* residual count */
- int retries;
- void *sense;
-};
-
-static inline struct scsi_request *scsi_req(struct request *rq)
-{
- return blk_mq_rq_to_pdu(rq);
-}
-
-static inline void scsi_req_free_cmd(struct scsi_request *req)
-{
- if (req->cmd != req->__cmd)
- kfree(req->cmd);
-}
-
-#endif /* _SCSI_SCSI_REQUEST_H */
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index c5d7810fd792..38e4a67f5922 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -251,6 +251,8 @@ struct iscsi_cls_session {
bool recovery_tmo_sysfs_override;
struct delayed_work recovery_work;
+ struct workqueue_struct *workq;
+
unsigned int target_id;
bool ida_used;
@@ -278,7 +280,6 @@ struct iscsi_cls_session {
iscsi_dev_to_session(_stgt->dev.parent)
struct iscsi_cls_host {
- atomic_t nr_scans;
struct mutex mutex;
struct request_queue *bsg_q;
uint32_t port_speed;
@@ -441,14 +442,14 @@ extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
unsigned int target_id);
extern void iscsi_remove_session(struct iscsi_cls_session *session);
extern void iscsi_free_session(struct iscsi_cls_session *session);
-extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
+extern struct iscsi_cls_conn *iscsi_alloc_conn(struct iscsi_cls_session *sess,
int dd_size, uint32_t cid);
+extern int iscsi_add_conn(struct iscsi_cls_conn *conn);
+extern void iscsi_remove_conn(struct iscsi_cls_conn *conn);
extern void iscsi_put_conn(struct iscsi_cls_conn *conn);
extern void iscsi_get_conn(struct iscsi_cls_conn *conn);
-extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
extern void iscsi_unblock_session(struct iscsi_cls_session *session);
extern void iscsi_block_session(struct iscsi_cls_session *session);
-extern int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time);
extern struct iscsi_endpoint *iscsi_create_endpoint(int dd_size);
extern void iscsi_destroy_endpoint(struct iscsi_endpoint *ep);
extern struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle);
diff --git a/include/scsi/viosrp.h b/include/scsi/viosrp.h
index c978133c83e3..6c5559d2b285 100644
--- a/include/scsi/viosrp.h
+++ b/include/scsi/viosrp.h
@@ -70,12 +70,17 @@ enum viosrp_crq_status {
};
struct viosrp_crq {
- u8 valid; /* used by RPA */
- u8 format; /* SCSI vs out-of-band */
- u8 reserved;
- u8 status; /* non-scsi failure? (e.g. DMA failure) */
- __be16 timeout; /* in seconds */
- __be16 IU_length; /* in bytes */
+ union {
+ __be64 high; /* High 64 bits */
+ struct {
+ u8 valid; /* used by RPA */
+ u8 format; /* SCSI vs out-of-band */
+ u8 reserved;
+ u8 status; /* non-scsi failure? (e.g. DMA failure) */
+ __be16 timeout; /* in seconds */
+ __be16 IU_length; /* in bytes */
+ };
+ };
__be64 IU_data_ptr; /* the TCE for transferring data */
};