X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fscsi%2Fscsi_transport_iscsi.h;h=8b6c91df4c7a9057c08aa23569838ac7358ddc89;hb=aab0de245150c09e61c30962feb16aacde508dc3;hp=4028f121d548df456d8cffec44ca071bfbea12c9;hpb=5d91e209fb21fb9cc765729d4c6a85a9fb6c9187;p=linux-2.6-omap-h63xx.git diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 4028f121d54..8b6c91df4c7 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -30,11 +30,11 @@ struct scsi_transport_template; struct iscsi_transport; +struct iscsi_endpoint; struct Scsi_Host; struct iscsi_cls_conn; struct iscsi_conn; -struct iscsi_cmd_task; -struct iscsi_mgmt_task; +struct iscsi_task; struct sockaddr; /** @@ -58,19 +58,22 @@ struct sockaddr; * @stop_conn: suspend/recover/terminate connection * @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text. * @session_recovery_timedout: notify LLD a block during recovery timed out - * @init_cmd_task: Initialize a iscsi_cmd_task and any internal structs. - * Called from queuecommand with session lock held. - * @init_mgmt_task: Initialize a iscsi_mgmt_task and any internal structs. - * Called from iscsi_conn_send_generic with xmitmutex. - * @xmit_cmd_task: Requests LLD to transfer cmd task. Returns 0 or the + * @init_task: Initialize a iscsi_task and any internal structs. + * When offloading the data path, this is called from + * queuecommand with the session lock, or from the + * iscsi_conn_send_pdu context with the session lock. + * When not offloading the data path, this is called + * from the scsi work queue without the session lock. + * @xmit_task Requests LLD to transfer cmd task. Returns 0 or the * the number of bytes transferred on success, and -Exyz - * value on error. - * @xmit_mgmt_task: Requests LLD to transfer mgmt task. Returns 0 or the - * the number of bytes transferred on success, and -Exyz - * value on error. - * @cleanup_cmd_task: requests LLD to fail cmd task. Called with xmitmutex - * and session->lock after the connection has been - * suspended and terminated during recovery. If called + * value on error. When offloading the data path, this + * is called from queuecommand with the session lock, or + * from the iscsi_conn_send_pdu context with the session + * lock. When not offloading the data path, this is called + * from the scsi work queue without the session lock. + * @cleanup_task: requests LLD to fail task. Called with session lock + * and after the connection has been suspended and + * terminated during recovery. If called * from abort task then connection is not suspended * or terminated but sk_callback_lock is held * @@ -83,7 +86,7 @@ struct iscsi_transport { /* LLD sets this to indicate what values it can export to sysfs */ uint64_t param_mask; uint64_t host_param_mask; - struct iscsi_cls_session *(*create_session) (struct Scsi_Host *shost, + struct iscsi_cls_session *(*create_session) (struct iscsi_endpoint *ep, uint16_t cmds_max, uint16_t qdepth, uint32_t sn, uint32_t *hn); void (*destroy_session) (struct iscsi_cls_session *session); @@ -110,20 +113,15 @@ struct iscsi_transport { char *data, uint32_t data_size); void (*get_stats) (struct iscsi_cls_conn *conn, struct iscsi_stats *stats); - int (*init_cmd_task) (struct iscsi_cmd_task *ctask); - void (*init_mgmt_task) (struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask); - int (*xmit_cmd_task) (struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask); - void (*cleanup_cmd_task) (struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask); - int (*xmit_mgmt_task) (struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask); + int (*init_task) (struct iscsi_task *task); + int (*xmit_task) (struct iscsi_task *task); + void (*cleanup_task) (struct iscsi_conn *conn, + struct iscsi_task *task); void (*session_recovery_timedout) (struct iscsi_cls_session *session); - int (*ep_connect) (struct sockaddr *dst_addr, int non_blocking, - uint64_t *ep_handle); - int (*ep_poll) (uint64_t ep_handle, int timeout_ms); - void (*ep_disconnect) (uint64_t ep_handle); + struct iscsi_endpoint *(*ep_connect) (struct sockaddr *dst_addr, + int non_blocking); + int (*ep_poll) (struct iscsi_endpoint *ep, int timeout_ms); + void (*ep_disconnect) (struct iscsi_endpoint *ep); int (*tgt_dscvr) (struct Scsi_Host *shost, enum iscsi_tgt_dscvr type, uint32_t enable, struct sockaddr *dst_addr); }; @@ -164,9 +162,10 @@ enum { ISCSI_SESSION_FREE, }; +#define ISCSI_MAX_TARGET -1 + struct iscsi_cls_session { struct list_head sess_list; /* item in session_list */ - struct list_head host_list; struct iscsi_transport *transport; spinlock_t lock; struct work_struct block_work; @@ -178,7 +177,7 @@ struct iscsi_cls_session { int recovery_tmo; struct delayed_work recovery_work; - int target_id; + unsigned int target_id; int state; int sid; /* session id */ @@ -196,16 +195,20 @@ struct iscsi_cls_session { iscsi_dev_to_session(_stgt->dev.parent) struct iscsi_cls_host { - struct list_head sessions; atomic_t nr_scans; struct mutex mutex; struct workqueue_struct *scan_workq; - char scan_workq_name[KOBJ_NAME_LEN]; + char scan_workq_name[20]; }; extern void iscsi_host_for_each_session(struct Scsi_Host *shost, void (*fn)(struct iscsi_cls_session *)); +struct iscsi_endpoint { + void *dd_data; /* LLD private data */ + struct device dev; + unsigned int id; +}; /* * session and connection functions that can be used by HW iSCSI LLDs @@ -236,5 +239,8 @@ 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); #endif