--- zzzz-none-000/linux-3.10.107/drivers/infiniband/ulp/iser/iscsi_iser.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/infiniband/ulp/iser/iscsi_iser.h 2021-02-04 17:41:59.000000000 +0000 @@ -8,7 +8,7 @@ * * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved. * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. - * Copyright (c) 2013 Mellanox Technologies. All rights reserved. + * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU @@ -46,6 +46,8 @@ #include #include #include +#include +#include #include #include @@ -67,42 +69,49 @@ #define DRV_NAME "iser" #define PFX DRV_NAME ": " -#define DRV_VER "1.1" +#define DRV_VER "1.6" -#define iser_dbg(fmt, arg...) \ - do { \ - if (iser_debug_level > 2) \ - printk(KERN_DEBUG PFX "%s:" fmt,\ - __func__ , ## arg); \ +#define iser_dbg(fmt, arg...) \ + do { \ + if (unlikely(iser_debug_level > 2)) \ + printk(KERN_DEBUG PFX "%s: " fmt,\ + __func__ , ## arg); \ } while (0) #define iser_warn(fmt, arg...) \ do { \ - if (iser_debug_level > 1) \ - pr_warn(PFX "%s:" fmt, \ + if (unlikely(iser_debug_level > 0)) \ + pr_warn(PFX "%s: " fmt, \ __func__ , ## arg); \ } while (0) #define iser_info(fmt, arg...) \ do { \ - if (iser_debug_level > 0) \ - pr_info(PFX "%s:" fmt, \ + if (unlikely(iser_debug_level > 1)) \ + pr_info(PFX "%s: " fmt, \ __func__ , ## arg); \ } while (0) -#define iser_err(fmt, arg...) \ - do { \ - printk(KERN_ERR PFX "%s:" fmt, \ - __func__ , ## arg); \ - } while (0) +#define iser_err(fmt, arg...) \ + pr_err(PFX "%s: " fmt, __func__ , ## arg) #define SHIFT_4K 12 #define SIZE_4K (1ULL << SHIFT_4K) #define MASK_4K (~(SIZE_4K-1)) - /* support up to 512KB in one RDMA */ -#define ISCSI_ISER_SG_TABLESIZE (0x80000 >> SHIFT_4K) -#define ISER_DEF_CMD_PER_LUN ISCSI_DEF_XMIT_CMDS_MAX +/* Default support is 512KB I/O size */ +#define ISER_DEF_MAX_SECTORS 1024 +#define ISCSI_ISER_DEF_SG_TABLESIZE ((ISER_DEF_MAX_SECTORS * 512) >> SHIFT_4K) +/* Maximum support is 8MB I/O size */ +#define ISCSI_ISER_MAX_SG_TABLESIZE ((16384 * 512) >> SHIFT_4K) + +#define ISER_DEF_XMIT_CMDS_DEFAULT 512 +#if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT + #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX +#else + #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT +#endif +#define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX /* QP settings */ /* Maximal bounds on received asynchronous PDUs */ @@ -111,9 +120,9 @@ #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), * * SCSI_TMFUNC(2), LOGOUT(1) */ -#define ISER_QP_MAX_RECV_DTOS (ISCSI_DEF_XMIT_CMDS_MAX) +#define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX) -#define ISER_MIN_POSTED_RX (ISCSI_DEF_XMIT_CMDS_MAX >> 2) +#define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2) /* the max TX (send) WR supported by the iSER QP is defined by * * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * @@ -123,21 +132,51 @@ #define ISER_INFLIGHT_DATAOUTS 8 -#define ISER_QP_MAX_REQ_DTOS (ISCSI_DEF_XMIT_CMDS_MAX * \ +#define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ (1 + ISER_INFLIGHT_DATAOUTS) + \ ISER_MAX_TX_MISC_PDUS + \ ISER_MAX_RX_MISC_PDUS) +/* Max registration work requests per command */ +#define ISER_MAX_REG_WR_PER_CMD 5 + +/* For Signature we don't support DATAOUTs so no need to make room for them */ +#define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ + (1 + ISER_MAX_REG_WR_PER_CMD) + \ + ISER_MAX_TX_MISC_PDUS + \ + ISER_MAX_RX_MISC_PDUS) + +#define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ + - ISER_MAX_TX_MISC_PDUS \ + - ISER_MAX_RX_MISC_PDUS) / \ + (1 + ISER_INFLIGHT_DATAOUTS)) + +#define ISER_WC_BATCH_COUNT 16 +#define ISER_SIGNAL_CMD_COUNT 32 + #define ISER_VER 0x10 #define ISER_WSV 0x08 #define ISER_RSV 0x04 +#define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL +#define ISER_BEACON_WRID 0xfffffffffffffffeULL + +/** + * struct iser_hdr - iSER header + * + * @flags: flags support (zbva, remote_inv) + * @rsvd: reserved + * @write_stag: write rkey + * @write_va: write virtual address + * @reaf_stag: read rkey + * @read_va: read virtual address + */ struct iser_hdr { u8 flags; u8 rsvd[3]; - __be32 write_stag; /* write rkey */ + __be32 write_stag; __be64 write_va; - __be32 read_stag; /* read rkey */ + __be32 read_stag; __be64 read_va; } __attribute__((packed)); @@ -160,7 +199,7 @@ /* Length of an object name string */ #define ISER_OBJECT_NAME_SIZE 64 -enum iser_ib_conn_state { +enum iser_conn_state { ISER_CONN_INIT, /* descriptor allocd, no conn */ ISER_CONN_PENDING, /* in the process of being established */ ISER_CONN_UP, /* up and running */ @@ -181,39 +220,38 @@ ISER_DIRS_NUM }; +/** + * struct iser_data_buf - iSER data buffer + * + * @sg: pointer to the sg list + * @size: num entries of this sg + * @data_len: total beffer byte len + * @dma_nents: returned by dma_map_sg + */ struct iser_data_buf { - void *buf; /* pointer to the sg list */ - unsigned int size; /* num entries of this sg */ - unsigned long data_len; /* total data len */ - unsigned int dma_nents; /* returned by dma_map_sg */ - char *copy_buf; /* allocated copy buf for SGs unaligned * - * for rdma which are copied */ - struct scatterlist sg_single; /* SG-ified clone of a non SG SC or * - * unaligned SG */ - }; + struct scatterlist *sg; + int size; + unsigned long data_len; + unsigned int dma_nents; +}; /* fwd declarations */ struct iser_device; -struct iser_cq_desc; -struct iscsi_iser_conn; struct iscsi_iser_task; struct iscsi_endpoint; +struct iser_reg_resources; +/** + * struct iser_mem_reg - iSER memory registration info + * + * @sge: memory region sg element + * @rkey: memory region remote key + * @mem_h: pointer to registration context (FMR/Fastreg) + */ struct iser_mem_reg { - u32 lkey; - u32 rkey; - u64 va; - u64 len; - void *mem_h; - int is_fmr; -}; - -struct iser_regd_buf { - struct iser_mem_reg reg; /* memory registration info */ - void *virt_addr; - struct iser_device *device; /* device->device for dma_unmap */ - enum dma_data_direction direction; /* direction for dma_unmap */ - unsigned int data_size; + struct ib_sge sge; + u32 rkey; + void *mem_h; }; enum iser_desc_type { @@ -222,19 +260,63 @@ ISCSI_TX_DATAOUT }; +/* Maximum number of work requests per task: + * Data memory region local invalidate + fast registration + * Protection memory region local invalidate + fast registration + * Signature memory region local invalidate + fast registration + * PDU send + */ +#define ISER_MAX_WRS 7 + +/** + * struct iser_tx_desc - iSER TX descriptor (for send wr_id) + * + * @iser_header: iser header + * @iscsi_header: iscsi header + * @type: command/control/dataout + * @dam_addr: header buffer dma_address + * @tx_sg: sg[0] points to iser/iscsi headers + * sg[1] optionally points to either of immediate data + * unsolicited data-out or control + * @num_sge: number sges used on this TX task + * @mapped: Is the task header mapped + * @wr_idx: Current WR index + * @wrs: Array of WRs per task + * @data_reg: Data buffer registration details + * @prot_reg: Protection buffer registration details + * @sig_attrs: Signature attributes + */ struct iser_tx_desc { struct iser_hdr iser_header; struct iscsi_hdr iscsi_header; enum iser_desc_type type; u64 dma_addr; - /* sg[0] points to iser/iscsi headers, sg[1] optionally points to either - of immediate data, unsolicited data-out or control (login,text) */ struct ib_sge tx_sg[2]; int num_sge; + bool mapped; + u8 wr_idx; + union iser_wr { + struct ib_send_wr send; + struct ib_reg_wr fast_reg; + struct ib_sig_handover_wr sig; + } wrs[ISER_MAX_WRS]; + struct iser_mem_reg data_reg; + struct iser_mem_reg prot_reg; + struct ib_sig_attrs sig_attrs; }; #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ sizeof(u64) + sizeof(struct ib_sge))) +/** + * struct iser_rx_desc - iSER RX descriptor (for recv wr_id) + * + * @iser_header: iser header + * @iscsi_header: iscsi header + * @data: received data segment + * @dma_addr: receive buffer dma address + * @rx_sg: ib_sge of receive buffer + * @pad: for sense data TODO: Modify to maximum sense length supported + */ struct iser_rx_desc { struct iser_hdr iser_header; struct iscsi_hdr iscsi_header; @@ -244,63 +326,255 @@ char pad[ISER_RX_PAD_SIZE]; } __attribute__((packed)); -#define ISER_MAX_CQ 4 +struct iser_conn; +struct ib_conn; +struct iscsi_iser_task; +/** + * struct iser_comp - iSER completion context + * + * @device: pointer to device handle + * @cq: completion queue + * @wcs: work completion array + * @tasklet: Tasklet handle + * @active_qps: Number of active QPs attached + * to completion context + */ +struct iser_comp { + struct iser_device *device; + struct ib_cq *cq; + struct ib_wc wcs[ISER_WC_BATCH_COUNT]; + struct tasklet_struct tasklet; + int active_qps; +}; + +/** + * struct iser_device - Memory registration operations + * per-device registration schemes + * + * @alloc_reg_res: Allocate registration resources + * @free_reg_res: Free registration resources + * @fast_reg_mem: Register memory buffers + * @unreg_mem: Un-register memory buffers + * @reg_desc_get: Get a registration descriptor for pool + * @reg_desc_put: Get a registration descriptor to pool + */ +struct iser_reg_ops { + int (*alloc_reg_res)(struct ib_conn *ib_conn, + unsigned cmds_max, + unsigned int size); + void (*free_reg_res)(struct ib_conn *ib_conn); + int (*reg_mem)(struct iscsi_iser_task *iser_task, + struct iser_data_buf *mem, + struct iser_reg_resources *rsc, + struct iser_mem_reg *reg); + void (*unreg_mem)(struct iscsi_iser_task *iser_task, + enum iser_data_dir cmd_dir); + struct iser_fr_desc * (*reg_desc_get)(struct ib_conn *ib_conn); + void (*reg_desc_put)(struct ib_conn *ib_conn, + struct iser_fr_desc *desc); +}; + +/** + * struct iser_device - iSER device handle + * + * @ib_device: RDMA device + * @pd: Protection Domain for this device + * @dev_attr: Device attributes container + * @mr: Global DMA memory region + * @event_handler: IB events handle routine + * @ig_list: entry in devices list + * @refcount: Reference counter, dominated by open iser connections + * @comps_used: Number of completion contexts used, Min between online + * cpus and device max completion vectors + * @comps: Dinamically allocated array of completion handlers + * @reg_ops: Registration ops + */ struct iser_device { struct ib_device *ib_device; struct ib_pd *pd; - struct ib_cq *rx_cq[ISER_MAX_CQ]; - struct ib_cq *tx_cq[ISER_MAX_CQ]; + struct ib_device_attr dev_attr; struct ib_mr *mr; - struct tasklet_struct cq_tasklet[ISER_MAX_CQ]; struct ib_event_handler event_handler; - struct list_head ig_list; /* entry in ig devices list */ + struct list_head ig_list; int refcount; - int cq_active_qps[ISER_MAX_CQ]; - int cqs_used; - struct iser_cq_desc *cq_desc; + int comps_used; + struct iser_comp *comps; + struct iser_reg_ops *reg_ops; +}; + +#define ISER_CHECK_GUARD 0xc0 +#define ISER_CHECK_REFTAG 0x0f +#define ISER_CHECK_APPTAG 0x30 + +/** + * struct iser_reg_resources - Fast registration recources + * + * @mr: memory region + * @fmr_pool: pool of fmrs + * @page_vec: fast reg page list used by fmr pool + * @mr_valid: is mr valid indicator + */ +struct iser_reg_resources { + union { + struct ib_mr *mr; + struct ib_fmr_pool *fmr_pool; + }; + struct iser_page_vec *page_vec; + u8 mr_valid:1; +}; + +/** + * struct iser_pi_context - Protection information context + * + * @rsc: protection buffer registration resources + * @sig_mr: signature enable memory region + * @sig_mr_valid: is sig_mr valid indicator + * @sig_protected: is region protected indicator + */ +struct iser_pi_context { + struct iser_reg_resources rsc; + struct ib_mr *sig_mr; + u8 sig_mr_valid:1; + u8 sig_protected:1; +}; + +/** + * struct iser_fr_desc - Fast registration descriptor + * + * @list: entry in connection fastreg pool + * @rsc: data buffer registration resources + * @pi_ctx: protection information context + */ +struct iser_fr_desc { + struct list_head list; + struct iser_reg_resources rsc; + struct iser_pi_context *pi_ctx; +}; + +/** + * struct iser_fr_pool: connection fast registration pool + * + * @list: list of fastreg descriptors + * @lock: protects fmr/fastreg pool + * @size: size of the pool + */ +struct iser_fr_pool { + struct list_head list; + spinlock_t lock; + int size; +}; + +/** + * struct ib_conn - Infiniband related objects + * + * @cma_id: rdma_cm connection maneger handle + * @qp: Connection Queue-pair + * @post_recv_buf_count: post receive counter + * @sig_count: send work request signal count + * @rx_wr: receive work request for batch posts + * @device: reference to iser device + * @comp: iser completion context + * @pi_support: Indicate device T10-PI support + * @beacon: beacon send wr to signal all flush errors were drained + * @flush_comp: completes when all connection completions consumed + * @fr_pool: connection fast registration poool + */ +struct ib_conn { + struct rdma_cm_id *cma_id; + struct ib_qp *qp; + int post_recv_buf_count; + u8 sig_count; + struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; + struct iser_device *device; + struct iser_comp *comp; + bool pi_support; + struct ib_send_wr beacon; + struct completion flush_comp; + struct iser_fr_pool fr_pool; }; +/** + * struct iser_conn - iSER connection context + * + * @ib_conn: connection RDMA resources + * @iscsi_conn: link to matching iscsi connection + * @ep: transport handle + * @state: connection logical state + * @qp_max_recv_dtos: maximum number of data outs, corresponds + * to max number of post recvs + * @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1) + * @min_posted_rx: (qp_max_recv_dtos >> 2) + * @max_cmds: maximum cmds allowed for this connection + * @name: connection peer portal + * @release_work: deffered work for release job + * @state_mutex: protects iser onnection state + * @stop_completion: conn_stop completion + * @ib_completion: RDMA cleanup completion + * @up_completion: connection establishment completed + * (state is ISER_CONN_UP) + * @conn_list: entry in ig conn list + * @login_buf: login data buffer (stores login parameters) + * @login_req_buf: login request buffer + * @login_req_dma: login request buffer dma address + * @login_resp_buf: login response buffer + * @login_resp_dma: login response buffer dma address + * @rx_desc_head: head of rx_descs cyclic buffer + * @rx_descs: rx buffers array (cyclic buffer) + * @num_rx_descs: number of rx descriptors + * @scsi_sg_tablesize: scsi host sg_tablesize + * @scsi_max_sectors: scsi host max sectors + */ struct iser_conn { - struct iscsi_iser_conn *iser_conn; /* iser conn for upcalls */ + struct ib_conn ib_conn; + struct iscsi_conn *iscsi_conn; struct iscsi_endpoint *ep; - enum iser_ib_conn_state state; /* rdma connection state */ - atomic_t refcount; - spinlock_t lock; /* used for state changes */ - struct iser_device *device; /* device context */ - struct rdma_cm_id *cma_id; /* CMA ID */ - struct ib_qp *qp; /* QP */ - struct ib_fmr_pool *fmr_pool; /* pool of IB FMRs */ - wait_queue_head_t wait; /* waitq for conn/disconn */ - int post_recv_buf_count; /* posted rx count */ - atomic_t post_send_buf_count; /* posted tx count */ + enum iser_conn_state state; + unsigned qp_max_recv_dtos; + unsigned qp_max_recv_dtos_mask; + unsigned min_posted_rx; + u16 max_cmds; char name[ISER_OBJECT_NAME_SIZE]; - struct iser_page_vec *page_vec; /* represents SG to fmr maps* - * maps serialized as tx is*/ - struct list_head conn_list; /* entry in ig conn list */ + struct work_struct release_work; + struct mutex state_mutex; + struct completion stop_completion; + struct completion ib_completion; + struct completion up_completion; + struct list_head conn_list; char *login_buf; char *login_req_buf, *login_resp_buf; u64 login_req_dma, login_resp_dma; unsigned int rx_desc_head; struct iser_rx_desc *rx_descs; - struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; -}; - -struct iscsi_iser_conn { - struct iscsi_conn *iscsi_conn;/* ptr to iscsi conn */ - struct iser_conn *ib_conn; /* iSER IB conn */ + u32 num_rx_descs; + unsigned short scsi_sg_tablesize; + unsigned int scsi_max_sectors; }; +/** + * struct iscsi_iser_task - iser task context + * + * @desc: TX descriptor + * @iser_conn: link to iser connection + * @status: current task status + * @sc: link to scsi command + * @command_sent: indicate if command was sent + * @dir: iser data direction + * @rdma_reg: task rdma registration desc + * @data: iser data buffer desc + * @prot: iser protection buffer desc + */ struct iscsi_iser_task { struct iser_tx_desc desc; - struct iscsi_iser_conn *iser_conn; + struct iser_conn *iser_conn; enum iser_task_status status; - int command_sent; /* set if command sent */ - int dir[ISER_DIRS_NUM]; /* set if dir use*/ - struct iser_regd_buf rdma_regd[ISER_DIRS_NUM];/* regd rdma buf */ - struct iser_data_buf data[ISER_DIRS_NUM]; /* orig. data des*/ - struct iser_data_buf data_copy[ISER_DIRS_NUM];/* contig. copy */ + struct scsi_cmnd *sc; + int command_sent; + int dir[ISER_DIRS_NUM]; + struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; + struct iser_data_buf data[ISER_DIRS_NUM]; + struct iser_data_buf prot[ISER_DIRS_NUM]; }; struct iser_page_vec { @@ -310,25 +584,31 @@ int data_size; }; -struct iser_cq_desc { - struct iser_device *device; - int cq_index; -}; - +/** + * struct iser_global: iSER global context + * + * @device_list_mutex: protects device_list + * @device_list: iser devices global list + * @connlist_mutex: protects connlist + * @connlist: iser connections global list + * @desc_cache: kmem cache for tx dataout + */ struct iser_global { - struct mutex device_list_mutex;/* */ - struct list_head device_list; /* all iSER devices */ + struct mutex device_list_mutex; + struct list_head device_list; struct mutex connlist_mutex; - struct list_head connlist; /* all iSER IB connections */ - + struct list_head connlist; struct kmem_cache *desc_cache; }; extern struct iser_global ig; extern int iser_debug_level; +extern bool iser_pi_enable; +extern int iser_pi_guard; +extern unsigned int iser_max_sectors; +extern bool iser_always_reg; -/* allocate connection resources needed for rdma functionality */ -int iser_conn_set_full_featured_mode(struct iscsi_conn *conn); +int iser_assign_reg_ops(struct iser_device *device); int iser_send_control(struct iscsi_conn *conn, struct iscsi_task *task); @@ -341,58 +621,102 @@ struct iscsi_data *hdr); void iscsi_iser_recv(struct iscsi_conn *conn, - struct iscsi_hdr *hdr, - char *rx_data, - int rx_data_len); + struct iscsi_hdr *hdr, + char *rx_data, + int rx_data_len); -void iser_conn_init(struct iser_conn *ib_conn); +void iser_conn_init(struct iser_conn *iser_conn); -void iser_conn_get(struct iser_conn *ib_conn); +void iser_conn_release(struct iser_conn *iser_conn); -int iser_conn_put(struct iser_conn *ib_conn, int destroy_cma_id_allowed); +int iser_conn_terminate(struct iser_conn *iser_conn); -void iser_conn_terminate(struct iser_conn *ib_conn); +void iser_release_work(struct work_struct *work); void iser_rcv_completion(struct iser_rx_desc *desc, - unsigned long dto_xfer_len, - struct iser_conn *ib_conn); + unsigned long dto_xfer_len, + struct ib_conn *ib_conn); -void iser_snd_completion(struct iser_tx_desc *desc, struct iser_conn *ib_conn); +void iser_snd_completion(struct iser_tx_desc *desc, + struct ib_conn *ib_conn); void iser_task_rdma_init(struct iscsi_iser_task *task); void iser_task_rdma_finalize(struct iscsi_iser_task *task); -void iser_free_rx_descriptors(struct iser_conn *ib_conn); - -void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *task, - enum iser_data_dir cmd_dir); - -int iser_reg_rdma_mem(struct iscsi_iser_task *task, - enum iser_data_dir cmd_dir); - -int iser_connect(struct iser_conn *ib_conn, - struct sockaddr_in *src_addr, - struct sockaddr_in *dst_addr, - int non_blocking); +void iser_free_rx_descriptors(struct iser_conn *iser_conn); -int iser_reg_page_vec(struct iser_conn *ib_conn, - struct iser_page_vec *page_vec, - struct iser_mem_reg *mem_reg); - -void iser_unreg_mem(struct iser_mem_reg *mem_reg); - -int iser_post_recvl(struct iser_conn *ib_conn); -int iser_post_recvm(struct iser_conn *ib_conn, int count); -int iser_post_send(struct iser_conn *ib_conn, struct iser_tx_desc *tx_desc); +void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, + struct iser_data_buf *mem, + enum iser_data_dir cmd_dir); + +int iser_reg_rdma_mem(struct iscsi_iser_task *task, + enum iser_data_dir dir); +void iser_unreg_rdma_mem(struct iscsi_iser_task *task, + enum iser_data_dir dir); + +int iser_connect(struct iser_conn *iser_conn, + struct sockaddr *src_addr, + struct sockaddr *dst_addr, + int non_blocking); + +void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task, + enum iser_data_dir cmd_dir); +void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task, + enum iser_data_dir cmd_dir); + +int iser_post_recvl(struct iser_conn *iser_conn); +int iser_post_recvm(struct iser_conn *iser_conn, int count); +int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, + bool signal); int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, - struct iser_data_buf *data, - enum iser_data_dir iser_dir, - enum dma_data_direction dma_dir); + struct iser_data_buf *data, + enum iser_data_dir iser_dir, + enum dma_data_direction dma_dir); + +void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, + struct iser_data_buf *data, + enum dma_data_direction dir); -void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task); int iser_initialize_task_headers(struct iscsi_task *task, struct iser_tx_desc *tx_desc); -int iser_alloc_rx_descriptors(struct iser_conn *ib_conn); +int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, + struct iscsi_session *session); +int iser_alloc_fmr_pool(struct ib_conn *ib_conn, + unsigned cmds_max, + unsigned int size); +void iser_free_fmr_pool(struct ib_conn *ib_conn); +int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, + unsigned cmds_max, + unsigned int size); +void iser_free_fastreg_pool(struct ib_conn *ib_conn); +u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, + enum iser_data_dir cmd_dir, sector_t *sector); +struct iser_fr_desc * +iser_reg_desc_get_fr(struct ib_conn *ib_conn); +void +iser_reg_desc_put_fr(struct ib_conn *ib_conn, + struct iser_fr_desc *desc); +struct iser_fr_desc * +iser_reg_desc_get_fmr(struct ib_conn *ib_conn); +void +iser_reg_desc_put_fmr(struct ib_conn *ib_conn, + struct iser_fr_desc *desc); + +static inline struct ib_send_wr * +iser_tx_next_wr(struct iser_tx_desc *tx_desc) +{ + struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx].send; + struct ib_send_wr *last_wr; + + if (tx_desc->wr_idx) { + last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1].send; + last_wr->next = cur_wr; + } + tx_desc->wr_idx++; + + return cur_wr; +} + #endif