diff options
Diffstat (limited to 'drivers/infiniband/ulp/srpt/ib_srpt.h')
| -rw-r--r-- | drivers/infiniband/ulp/srpt/ib_srpt.h | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.h b/drivers/infiniband/ulp/srpt/ib_srpt.h index 444dfd7281b5..39b3e50baf3d 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.h +++ b/drivers/infiniband/ulp/srpt/ib_srpt.h @@ -104,10 +104,6 @@ enum { SRP_CMD_ORDERED_Q = 0x2, SRP_CMD_ACA = 0x4, - SRP_LOGIN_RSP_MULTICHAN_NO_CHAN = 0x0, - SRP_LOGIN_RSP_MULTICHAN_TERMINATED = 0x1, - SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2, - SRPT_DEF_SG_TABLESIZE = 128, /* * An experimentally determined value that avoids that QP creation @@ -124,11 +120,18 @@ enum { MAX_SRPT_RDMA_SIZE = 1U << 24, MAX_SRPT_RSP_SIZE = 1024, + SRP_MAX_ADD_CDB_LEN = 16, + SRP_MAX_IMM_DATA_OFFSET = 80, + SRP_MAX_IMM_DATA = 8 * 1024, MIN_MAX_REQ_SIZE = 996, - DEFAULT_MAX_REQ_SIZE - = sizeof(struct srp_cmd)/*48*/ - + sizeof(struct srp_indirect_buf)/*20*/ - + 128 * sizeof(struct srp_direct_buf)/*16*/, + DEFAULT_MAX_REQ_SIZE_1 = sizeof(struct srp_cmd)/*48*/ + + SRP_MAX_ADD_CDB_LEN + + sizeof(struct srp_indirect_buf)/*20*/ + + 128 * sizeof(struct srp_direct_buf)/*16*/, + DEFAULT_MAX_REQ_SIZE_2 = SRP_MAX_IMM_DATA_OFFSET + + sizeof(struct srp_imm_buf) + SRP_MAX_IMM_DATA, + DEFAULT_MAX_REQ_SIZE = DEFAULT_MAX_REQ_SIZE_1 > DEFAULT_MAX_REQ_SIZE_2 ? + DEFAULT_MAX_REQ_SIZE_1 : DEFAULT_MAX_REQ_SIZE_2, MIN_MAX_RSP_SIZE = sizeof(struct srp_rsp)/*36*/ + 4, DEFAULT_MAX_RSP_SIZE = 256, /* leaves 220 bytes for sense data */ @@ -165,12 +168,14 @@ enum srpt_command_state { * @cqe: Completion queue element. * @buf: Pointer to the buffer. * @dma: DMA address of the buffer. + * @offset: Offset of the first byte in @buf and @dma that is actually used. * @index: Index of the I/O context in its ioctx_ring array. */ struct srpt_ioctx { struct ib_cqe cqe; void *buf; dma_addr_t dma; + uint32_t offset; uint32_t index; }; @@ -178,12 +183,14 @@ struct srpt_ioctx { * struct srpt_recv_ioctx - SRPT receive I/O context * @ioctx: See above. * @wait_list: Node for insertion in srpt_rdma_ch.cmd_wait_list. + * @byte_len: Number of bytes in @ioctx.buf. */ struct srpt_recv_ioctx { struct srpt_ioctx ioctx; struct list_head wait_list; + int byte_len; }; - + struct srpt_rw_ctx { struct rdma_rw_ctx rw; struct scatterlist *sg; @@ -194,8 +201,11 @@ struct srpt_rw_ctx { * struct srpt_send_ioctx - SRPT send I/O context * @ioctx: See above. * @ch: Channel pointer. + * @recv_ioctx: Receive I/O context associated with this send I/O context. + * Only used for processing immediate data. * @s_rw_ctx: @rw_ctxs points here if only a single rw_ctx is needed. * @rw_ctxs: RDMA read/write contexts. + * @imm_sg: Scatterlist for immediate data. * @rdma_cqe: RDMA completion queue element. * @free_list: Node in srpt_rdma_ch.free_list. * @state: I/O context state. @@ -209,10 +219,13 @@ struct srpt_rw_ctx { struct srpt_send_ioctx { struct srpt_ioctx ioctx; struct srpt_rdma_ch *ch; + struct srpt_recv_ioctx *recv_ioctx; struct srpt_rw_ctx s_rw_ctx; struct srpt_rw_ctx *rw_ctxs; + struct scatterlist imm_sg; + struct ib_cqe rdma_cqe; struct list_head free_list; enum srpt_command_state state; @@ -245,7 +258,10 @@ enum rdma_ch_state { * struct srpt_rdma_ch - RDMA channel * @nexus: I_T nexus this channel is associated with. * @qp: IB queue pair used for communicating over this channel. - * @cm_id: IB CM ID associated with the channel. + * @ib_cm: See below. + * @ib_cm.cm_id: IB CM ID associated with the channel. + * @rdma_cm: See below. + * @rdma_cm.cm_id: RDMA CM ID associated with the channel. * @cq: IB completion queue for this channel. * @zw_cqe: Zero-length write CQE. * @rcu: RCU head. @@ -259,12 +275,15 @@ enum rdma_ch_state { * @req_lim: request limit: maximum number of requests that may be sent * by the initiator without having received a response. * @req_lim_delta: Number of credits not yet sent back to the initiator. + * @imm_data_offset: Offset from start of SRP_CMD for immediate data. * @spinlock: Protects free_list and state. * @free_list: Head of list with free send I/O contexts. * @state: channel state. See also enum rdma_ch_state. * @using_rdma_cm: Whether the RDMA/CM or IB/CM is used for this channel. * @processing_wait_list: Whether or not cmd_wait_list is being processed. + * @rsp_buf_cache: kmem_cache for @ioctx_ring. * @ioctx_ring: Send ring. + * @req_buf_cache: kmem_cache for @ioctx_recv_ring. * @ioctx_recv_ring: Receive I/O context ring. * @list: Node in srpt_nexus.ch_list. * @cmd_wait_list: List of SCSI commands that arrived before the RTU event. This @@ -297,10 +316,13 @@ struct srpt_rdma_ch { int max_ti_iu_len; atomic_t req_lim; atomic_t req_lim_delta; + u16 imm_data_offset; spinlock_t spinlock; struct list_head free_list; enum rdma_ch_state state; + struct kmem_cache *rsp_buf_cache; struct srpt_send_ioctx **ioctx_ring; + struct kmem_cache *req_buf_cache; struct srpt_recv_ioctx **ioctx_recv_ring; struct list_head list; struct list_head cmd_wait_list; @@ -395,6 +417,7 @@ struct srpt_port { * @srq_size: SRQ size. * @sdev_mutex: Serializes use_srq changes. * @use_srq: Whether or not to use SRQ. + * @req_buf_cache: kmem_cache for @ioctx_ring buffers. * @ioctx_ring: Per-HCA SRQ. * @event_handler: Per-HCA asynchronous IB event handler. * @list: Node in srpt_dev_list. @@ -409,6 +432,7 @@ struct srpt_device { int srq_size; struct mutex sdev_mutex; bool use_srq; + struct kmem_cache *req_buf_cache; struct srpt_recv_ioctx **ioctx_ring; struct ib_event_handler event_handler; struct list_head list; |