From 2c47f9efbedbe5749b6bb16e59bc11d6e460855f Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Wed, 11 Jul 2007 15:08:17 +0900 Subject: [SCSI] tgt: add I_T nexus support tgt uses scsi_host as I_T nexus. This works for ibmvstgt because it creates one scsi_host for one initiator. However, other target drivers don't work like that. This adds I_T nexus support, which enable one scsi_host to handle multiple initiators. New scsi_tgt_it_nexus_create/destroy functions are expected be called transport classes. For example, ibmvstgt creates an initiator remote port, then the srp transport calls tgt_it_nexus_create. tgt doesn't manages I_T nexus, instead it tells tgtd, user-space daemon, to create a new I_T nexus. On the receiving the response from tgtd, tgt calls shost->transportt->it_nexus_response. transports should notify a lld. The srp transport uses it_nexus_response callback in srp_function_template to do that. Signed-off-by: FUJITA Tomonori Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/scsi_tgt_if.h | 35 +++++++++++++++++++++++++++-------- 1 file changed, 27 insertions(+), 8 deletions(-) (limited to 'include/scsi/scsi_tgt_if.h') diff --git a/include/scsi/scsi_tgt_if.h b/include/scsi/scsi_tgt_if.h index 4cf9dff29a2..f2ee7c238a4 100644 --- a/include/scsi/scsi_tgt_if.h +++ b/include/scsi/scsi_tgt_if.h @@ -23,13 +23,15 @@ #define __SCSI_TARGET_IF_H /* user -> kernel */ -#define TGT_UEVENT_CMD_RSP 0x0001 -#define TGT_UEVENT_TSK_MGMT_RSP 0x0002 +#define TGT_UEVENT_CMD_RSP 0x0001 +#define TGT_UEVENT_IT_NEXUS_RSP 0x0002 +#define TGT_UEVENT_TSK_MGMT_RSP 0x0003 /* kernel -> user */ -#define TGT_KEVENT_CMD_REQ 0x1001 -#define TGT_KEVENT_CMD_DONE 0x1002 -#define TGT_KEVENT_TSK_MGMT_REQ 0x1003 +#define TGT_KEVENT_CMD_REQ 0x1001 +#define TGT_KEVENT_CMD_DONE 0x1002 +#define TGT_KEVENT_IT_NEXUS_REQ 0x1003 +#define TGT_KEVENT_TSK_MGMT_REQ 0x1004 struct tgt_event_hdr { uint16_t version; @@ -46,6 +48,7 @@ struct tgt_event { struct { int host_no; int result; + aligned_u64 itn_id; aligned_u64 tag; aligned_u64 uaddr; aligned_u64 sense_uaddr; @@ -55,15 +58,22 @@ struct tgt_event { } cmd_rsp; struct { int host_no; - aligned_u64 mid; int result; + aligned_u64 itn_id; + aligned_u64 mid; } tsk_mgmt_rsp; - + struct { + __s32 host_no; + __s32 result; + aligned_u64 itn_id; + __u32 function; + } it_nexus_rsp; /* kernel -> user */ struct { int host_no; uint32_t data_len; + aligned_u64 itn_id; uint8_t scb[16]; uint8_t lun[8]; int attribute; @@ -71,16 +81,25 @@ struct tgt_event { } cmd_req; struct { int host_no; - aligned_u64 tag; int result; + aligned_u64 itn_id; + aligned_u64 tag; } cmd_done; struct { int host_no; int function; + aligned_u64 itn_id; aligned_u64 tag; uint8_t lun[8]; aligned_u64 mid; } tsk_mgmt_req; + struct { + __s32 host_no; + __u32 function; + aligned_u64 itn_id; + __u32 max_cmds; + __u8 initiator_id[16]; + } it_nexus_req; } p; } __attribute__ ((aligned (sizeof(uint64_t)))); -- cgit v1.2.3