mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
9f0abc1554
This patch converts tcm_vhost to use target_submit_cmd_map_sgls() for I/O submission and mapping of pre-allocated SGL memory from incoming virtio-scsi SGL memory -> se_cmd descriptors. This includes removing the original open-coded fabric uses of target core callers to support transport_generic_map_mem_to_cmd() between target_setup_cmd_from_cdb() and transport_handle_cdb_direct() logic. It also includes adding a handful of new tcm_vhost_cmnd member + assignments in vhost_scsi_allocate_cmd() used from cmwq process context I/O submission within tcm_vhost_submission_work() (v2: Use renamed target_submit_cmd_map_sgls) Reported-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@lst.de> Acked-by: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
#define TCM_VHOST_VERSION "v0.1"
|
|
#define TCM_VHOST_NAMELEN 256
|
|
#define TCM_VHOST_MAX_CDB_SIZE 32
|
|
|
|
struct tcm_vhost_cmd {
|
|
/* Descriptor from vhost_get_vq_desc() for virt_queue segment */
|
|
int tvc_vq_desc;
|
|
/* virtio-scsi initiator task attribute */
|
|
int tvc_task_attr;
|
|
/* virtio-scsi initiator data direction */
|
|
enum dma_data_direction tvc_data_direction;
|
|
/* Expected data transfer length from virtio-scsi header */
|
|
u32 tvc_exp_data_len;
|
|
/* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */
|
|
u64 tvc_tag;
|
|
/* The number of scatterlists associated with this cmd */
|
|
u32 tvc_sgl_count;
|
|
/* Saved unpacked SCSI LUN for tcm_vhost_submission_work() */
|
|
u32 tvc_lun;
|
|
/* Pointer to the SGL formatted memory from virtio-scsi */
|
|
struct scatterlist *tvc_sgl;
|
|
/* Pointer to response */
|
|
struct virtio_scsi_cmd_resp __user *tvc_resp;
|
|
/* Pointer to vhost_scsi for our device */
|
|
struct vhost_scsi *tvc_vhost;
|
|
/* Pointer to vhost nexus memory */
|
|
struct tcm_vhost_nexus *tvc_nexus;
|
|
/* The TCM I/O descriptor that is accessed via container_of() */
|
|
struct se_cmd tvc_se_cmd;
|
|
/* work item used for cmwq dispatch to tcm_vhost_submission_work() */
|
|
struct work_struct work;
|
|
/* Copy of the incoming SCSI command descriptor block (CDB) */
|
|
unsigned char tvc_cdb[TCM_VHOST_MAX_CDB_SIZE];
|
|
/* Sense buffer that will be mapped into outgoing status */
|
|
unsigned char tvc_sense_buf[TRANSPORT_SENSE_BUFFER];
|
|
/* Completed commands list, serviced from vhost worker thread */
|
|
struct list_head tvc_completion_list;
|
|
};
|
|
|
|
struct tcm_vhost_nexus {
|
|
/* Pointer to TCM session for I_T Nexus */
|
|
struct se_session *tvn_se_sess;
|
|
};
|
|
|
|
struct tcm_vhost_nacl {
|
|
/* Binary World Wide unique Port Name for Vhost Initiator port */
|
|
u64 iport_wwpn;
|
|
/* ASCII formatted WWPN for Sas Initiator port */
|
|
char iport_name[TCM_VHOST_NAMELEN];
|
|
/* Returned by tcm_vhost_make_nodeacl() */
|
|
struct se_node_acl se_node_acl;
|
|
};
|
|
|
|
struct tcm_vhost_tpg {
|
|
/* Vhost port target portal group tag for TCM */
|
|
u16 tport_tpgt;
|
|
/* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */
|
|
int tv_tpg_port_count;
|
|
/* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */
|
|
int tv_tpg_vhost_count;
|
|
/* list for tcm_vhost_list */
|
|
struct list_head tv_tpg_list;
|
|
/* Used to protect access for tpg_nexus */
|
|
struct mutex tv_tpg_mutex;
|
|
/* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */
|
|
struct tcm_vhost_nexus *tpg_nexus;
|
|
/* Pointer back to tcm_vhost_tport */
|
|
struct tcm_vhost_tport *tport;
|
|
/* Returned by tcm_vhost_make_tpg() */
|
|
struct se_portal_group se_tpg;
|
|
};
|
|
|
|
struct tcm_vhost_tport {
|
|
/* SCSI protocol the tport is providing */
|
|
u8 tport_proto_id;
|
|
/* Binary World Wide unique Port Name for Vhost Target port */
|
|
u64 tport_wwpn;
|
|
/* ASCII formatted WWPN for Vhost Target port */
|
|
char tport_name[TCM_VHOST_NAMELEN];
|
|
/* Returned by tcm_vhost_make_tport() */
|
|
struct se_wwn tport_wwn;
|
|
};
|
|
|
|
/*
|
|
* As per request from MST, keep TCM_VHOST related ioctl defines out of
|
|
* linux/vhost.h (user-space) for now..
|
|
*/
|
|
|
|
#include <linux/vhost.h>
|
|
|
|
/*
|
|
* Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
|
|
*
|
|
* ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
|
|
* RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage
|
|
*/
|
|
|
|
#define VHOST_SCSI_ABI_VERSION 0
|
|
|
|
struct vhost_scsi_target {
|
|
int abi_version;
|
|
char vhost_wwpn[TRANSPORT_IQN_LEN];
|
|
unsigned short vhost_tpgt;
|
|
unsigned short reserved;
|
|
};
|
|
|
|
/* VHOST_SCSI specific defines */
|
|
#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
|
|
#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)
|
|
/* Changing this breaks userspace. */
|
|
#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int)
|