14814a0a4SEdward Tomasz Napierala /*- 24814a0a4SEdward Tomasz Napierala * Copyright (c) 2015, Mellanox Technologies, Inc. All rights reserved. 34814a0a4SEdward Tomasz Napierala * 44814a0a4SEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 54814a0a4SEdward Tomasz Napierala * modification, are permitted provided that the following conditions 64814a0a4SEdward Tomasz Napierala * are met: 74814a0a4SEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 84814a0a4SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 94814a0a4SEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 104814a0a4SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 114814a0a4SEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 124814a0a4SEdward Tomasz Napierala * 134814a0a4SEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 144814a0a4SEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 154814a0a4SEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 164814a0a4SEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 174814a0a4SEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 184814a0a4SEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 194814a0a4SEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 204814a0a4SEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 214814a0a4SEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 224814a0a4SEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 234814a0a4SEdward Tomasz Napierala * SUCH DAMAGE. 244814a0a4SEdward Tomasz Napierala */ 254814a0a4SEdward Tomasz Napierala 264814a0a4SEdward Tomasz Napierala #ifndef ICL_ISER_H 274814a0a4SEdward Tomasz Napierala #define ICL_ISER_H 284814a0a4SEdward Tomasz Napierala 294814a0a4SEdward Tomasz Napierala /* 304814a0a4SEdward Tomasz Napierala * iSCSI Common Layer for RDMA. 314814a0a4SEdward Tomasz Napierala */ 324814a0a4SEdward Tomasz Napierala 334814a0a4SEdward Tomasz Napierala #include <sys/param.h> 344814a0a4SEdward Tomasz Napierala #include <sys/capsicum.h> 354814a0a4SEdward Tomasz Napierala #include <sys/condvar.h> 364814a0a4SEdward Tomasz Napierala #include <sys/conf.h> 374814a0a4SEdward Tomasz Napierala #include <sys/file.h> 384814a0a4SEdward Tomasz Napierala #include <sys/kernel.h> 394814a0a4SEdward Tomasz Napierala #include <sys/kthread.h> 404814a0a4SEdward Tomasz Napierala #include <sys/lock.h> 414814a0a4SEdward Tomasz Napierala #include <sys/mbuf.h> 424814a0a4SEdward Tomasz Napierala #include <sys/mutex.h> 434814a0a4SEdward Tomasz Napierala #include <sys/module.h> 444814a0a4SEdward Tomasz Napierala #include <sys/protosw.h> 454814a0a4SEdward Tomasz Napierala #include <sys/socket.h> 464814a0a4SEdward Tomasz Napierala #include <sys/socketvar.h> 474814a0a4SEdward Tomasz Napierala #include <sys/sysctl.h> 484814a0a4SEdward Tomasz Napierala #include <sys/systm.h> 494814a0a4SEdward Tomasz Napierala #include <sys/sx.h> 504814a0a4SEdward Tomasz Napierala #include <sys/uio.h> 514814a0a4SEdward Tomasz Napierala #include <sys/taskqueue.h> 524814a0a4SEdward Tomasz Napierala #include <sys/bio.h> 534814a0a4SEdward Tomasz Napierala #include <vm/uma.h> 544814a0a4SEdward Tomasz Napierala #include <netinet/in.h> 554814a0a4SEdward Tomasz Napierala #include <netinet/tcp.h> 564814a0a4SEdward Tomasz Napierala #include <dev/iscsi/icl.h> 574814a0a4SEdward Tomasz Napierala #include <dev/iscsi/iscsi_proto.h> 584814a0a4SEdward Tomasz Napierala #include <icl_conn_if.h> 594814a0a4SEdward Tomasz Napierala #include <cam/cam.h> 604814a0a4SEdward Tomasz Napierala #include <cam/cam_ccb.h> 614814a0a4SEdward Tomasz Napierala #include <rdma/ib_verbs.h> 624814a0a4SEdward Tomasz Napierala #include <rdma/ib_fmr_pool.h> 634814a0a4SEdward Tomasz Napierala #include <rdma/rdma_cm.h> 644814a0a4SEdward Tomasz Napierala 654814a0a4SEdward Tomasz Napierala 664814a0a4SEdward Tomasz Napierala #define ISER_DBG(X, ...) \ 674814a0a4SEdward Tomasz Napierala do { \ 684814a0a4SEdward Tomasz Napierala if (unlikely(iser_debug > 2)) \ 694814a0a4SEdward Tomasz Napierala printf("DEBUG: %s: " X "\n", \ 704814a0a4SEdward Tomasz Napierala __func__, ## __VA_ARGS__); \ 714814a0a4SEdward Tomasz Napierala } while (0) 724814a0a4SEdward Tomasz Napierala 734814a0a4SEdward Tomasz Napierala #define ISER_INFO(X, ...) \ 744814a0a4SEdward Tomasz Napierala do { \ 754814a0a4SEdward Tomasz Napierala if (unlikely(iser_debug > 1)) \ 764814a0a4SEdward Tomasz Napierala printf("INFO: %s: " X "\n", \ 774814a0a4SEdward Tomasz Napierala __func__, ## __VA_ARGS__); \ 784814a0a4SEdward Tomasz Napierala } while (0) 794814a0a4SEdward Tomasz Napierala 804814a0a4SEdward Tomasz Napierala #define ISER_WARN(X, ...) \ 814814a0a4SEdward Tomasz Napierala do { \ 824814a0a4SEdward Tomasz Napierala if (unlikely(iser_debug > 0)) { \ 834814a0a4SEdward Tomasz Napierala printf("WARNING: %s: " X "\n", \ 844814a0a4SEdward Tomasz Napierala __func__, ## __VA_ARGS__); \ 854814a0a4SEdward Tomasz Napierala } \ 864814a0a4SEdward Tomasz Napierala } while (0) 874814a0a4SEdward Tomasz Napierala 884814a0a4SEdward Tomasz Napierala #define ISER_ERR(X, ...) \ 894814a0a4SEdward Tomasz Napierala printf("ERROR: %s: " X "\n", __func__, ## __VA_ARGS__) 904814a0a4SEdward Tomasz Napierala 914814a0a4SEdward Tomasz Napierala #define ISER_VER 0x10 924814a0a4SEdward Tomasz Napierala #define ISER_WSV 0x08 934814a0a4SEdward Tomasz Napierala #define ISER_RSV 0x04 944814a0a4SEdward Tomasz Napierala 954814a0a4SEdward Tomasz Napierala #define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL 964814a0a4SEdward Tomasz Napierala #define ISER_BEACON_WRID 0xfffffffffffffffeULL 974814a0a4SEdward Tomasz Napierala 984814a0a4SEdward Tomasz Napierala #define SHIFT_4K 12 994814a0a4SEdward Tomasz Napierala #define SIZE_4K (1ULL << SHIFT_4K) 1004814a0a4SEdward Tomasz Napierala #define MASK_4K (~(SIZE_4K-1)) 1014814a0a4SEdward Tomasz Napierala 1024814a0a4SEdward Tomasz Napierala /* support up to 512KB in one RDMA */ 1034814a0a4SEdward Tomasz Napierala #define ISCSI_ISER_SG_TABLESIZE (0x80000 >> SHIFT_4K) 1044814a0a4SEdward Tomasz Napierala #define ISER_DEF_XMIT_CMDS_MAX 256 1054814a0a4SEdward Tomasz Napierala 1064814a0a4SEdward Tomasz Napierala /* the max RX (recv) WR supported by the iSER QP is defined by * 1074814a0a4SEdward Tomasz Napierala * max_recv_wr = commands_max + recv_beacon */ 1084814a0a4SEdward Tomasz Napierala #define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX + 1) 1094814a0a4SEdward Tomasz Napierala #define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2) 1104814a0a4SEdward Tomasz Napierala 1114814a0a4SEdward Tomasz Napierala /* QP settings */ 1124814a0a4SEdward Tomasz Napierala /* Maximal bounds on received asynchronous PDUs */ 1134814a0a4SEdward Tomasz Napierala #define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */ 1144814a0a4SEdward Tomasz Napierala #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), SCSI_TMFUNC(2), LOGOUT(1) */ 1154814a0a4SEdward Tomasz Napierala 1164814a0a4SEdward Tomasz Napierala /* the max TX (send) WR supported by the iSER QP is defined by * 1174814a0a4SEdward Tomasz Napierala * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * 1184814a0a4SEdward Tomasz Napierala * to have at max for SCSI command. The tx posting & completion handling code * 1194814a0a4SEdward Tomasz Napierala * supports -EAGAIN scheme where tx is suspended till the QP has room for more * 1204814a0a4SEdward Tomasz Napierala * send WR. D=8 comes from 64K/8K */ 1214814a0a4SEdward Tomasz Napierala 1224814a0a4SEdward Tomasz Napierala #define ISER_INFLIGHT_DATAOUTS 8 1234814a0a4SEdward Tomasz Napierala 1244814a0a4SEdward Tomasz Napierala /* the send_beacon increase the max_send_wr by 1 */ 1254814a0a4SEdward Tomasz Napierala #define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 1264814a0a4SEdward Tomasz Napierala (1 + ISER_INFLIGHT_DATAOUTS) + \ 1274814a0a4SEdward Tomasz Napierala ISER_MAX_TX_MISC_PDUS + \ 1284814a0a4SEdward Tomasz Napierala ISER_MAX_RX_MISC_PDUS + 1) 1294814a0a4SEdward Tomasz Napierala 1304814a0a4SEdward Tomasz Napierala #define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ 1314814a0a4SEdward Tomasz Napierala - ISER_MAX_TX_MISC_PDUS \ 1324814a0a4SEdward Tomasz Napierala - ISER_MAX_RX_MISC_PDUS - 1) / \ 1334814a0a4SEdward Tomasz Napierala (1 + ISER_INFLIGHT_DATAOUTS)) 1344814a0a4SEdward Tomasz Napierala 1354814a0a4SEdward Tomasz Napierala #define ISER_WC_BATCH_COUNT 16 1364814a0a4SEdward Tomasz Napierala #define ISER_SIGNAL_CMD_COUNT 32 1374814a0a4SEdward Tomasz Napierala 1384814a0a4SEdward Tomasz Napierala /* Maximal QP's recommended per CQ. In case we use more QP's per CQ we might * 1394814a0a4SEdward Tomasz Napierala * encounter a CQ overrun state. */ 1404814a0a4SEdward Tomasz Napierala #define ISCSI_ISER_MAX_CONN 8 1414814a0a4SEdward Tomasz Napierala #define ISER_MAX_RX_LEN (ISER_QP_MAX_RECV_DTOS * ISCSI_ISER_MAX_CONN) 1424814a0a4SEdward Tomasz Napierala #define ISER_MAX_TX_LEN (ISER_QP_MAX_REQ_DTOS * ISCSI_ISER_MAX_CONN) 1434814a0a4SEdward Tomasz Napierala #define ISER_MAX_CQ_LEN (ISER_MAX_RX_LEN + ISER_MAX_TX_LEN + \ 1444814a0a4SEdward Tomasz Napierala ISCSI_ISER_MAX_CONN) 1454814a0a4SEdward Tomasz Napierala 1464814a0a4SEdward Tomasz Napierala #define ISER_ZBVA_NOT_SUPPORTED 0x80 1474814a0a4SEdward Tomasz Napierala #define ISER_SEND_W_INV_NOT_SUPPORTED 0x40 1484814a0a4SEdward Tomasz Napierala 14995c4a392SEdward Tomasz Napierala #define ISCSI_DEF_MAX_RECV_SEG_LEN 8192 15095c4a392SEdward Tomasz Napierala #define ISCSI_OPCODE_MASK 0x3f 15195c4a392SEdward Tomasz Napierala 1524814a0a4SEdward Tomasz Napierala #define icl_to_iser_conn(ic) \ 1534814a0a4SEdward Tomasz Napierala container_of(ic, struct iser_conn, icl_conn) 1544814a0a4SEdward Tomasz Napierala #define icl_to_iser_pdu(ip) \ 1554814a0a4SEdward Tomasz Napierala container_of(ip, struct icl_iser_pdu, icl_pdu) 1564814a0a4SEdward Tomasz Napierala 1574814a0a4SEdward Tomasz Napierala /** 1584814a0a4SEdward Tomasz Napierala * struct iser_hdr - iSER header 1594814a0a4SEdward Tomasz Napierala * 1604814a0a4SEdward Tomasz Napierala * @flags: flags support (zbva, remote_inv) 1614814a0a4SEdward Tomasz Napierala * @rsvd: reserved 1624814a0a4SEdward Tomasz Napierala * @write_stag: write rkey 1634814a0a4SEdward Tomasz Napierala * @write_va: write virtual address 1644814a0a4SEdward Tomasz Napierala * @reaf_stag: read rkey 1654814a0a4SEdward Tomasz Napierala * @read_va: read virtual address 1664814a0a4SEdward Tomasz Napierala */ 1674814a0a4SEdward Tomasz Napierala struct iser_hdr { 1684814a0a4SEdward Tomasz Napierala u8 flags; 1694814a0a4SEdward Tomasz Napierala u8 rsvd[3]; 1704814a0a4SEdward Tomasz Napierala __be32 write_stag; 1714814a0a4SEdward Tomasz Napierala __be64 write_va; 1724814a0a4SEdward Tomasz Napierala __be32 read_stag; 1734814a0a4SEdward Tomasz Napierala __be64 read_va; 1744814a0a4SEdward Tomasz Napierala } __attribute__((packed)); 1754814a0a4SEdward Tomasz Napierala 1764814a0a4SEdward Tomasz Napierala struct iser_cm_hdr { 1774814a0a4SEdward Tomasz Napierala u8 flags; 1784814a0a4SEdward Tomasz Napierala u8 rsvd[3]; 1794814a0a4SEdward Tomasz Napierala } __packed; 1804814a0a4SEdward Tomasz Napierala 1814814a0a4SEdward Tomasz Napierala /* Constant PDU lengths calculations */ 1824814a0a4SEdward Tomasz Napierala #define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + ISCSI_BHS_SIZE) 1834814a0a4SEdward Tomasz Napierala 1844814a0a4SEdward Tomasz Napierala #define ISER_RECV_DATA_SEG_LEN 128 1854814a0a4SEdward Tomasz Napierala #define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN) 1864814a0a4SEdward Tomasz Napierala 1874814a0a4SEdward Tomasz Napierala #define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN) 1884814a0a4SEdward Tomasz Napierala 1894814a0a4SEdward Tomasz Napierala enum iser_conn_state { 1904814a0a4SEdward Tomasz Napierala ISER_CONN_INIT, /* descriptor allocd, no conn */ 1914814a0a4SEdward Tomasz Napierala ISER_CONN_PENDING, /* in the process of being established */ 1924814a0a4SEdward Tomasz Napierala ISER_CONN_UP, /* up and running */ 1934814a0a4SEdward Tomasz Napierala ISER_CONN_TERMINATING, /* in the process of being terminated */ 1944814a0a4SEdward Tomasz Napierala ISER_CONN_DOWN, /* shut down */ 1954814a0a4SEdward Tomasz Napierala ISER_CONN_STATES_NUM 1964814a0a4SEdward Tomasz Napierala }; 1974814a0a4SEdward Tomasz Napierala 1984814a0a4SEdward Tomasz Napierala enum iser_task_status { 1994814a0a4SEdward Tomasz Napierala ISER_TASK_STATUS_INIT = 0, 2004814a0a4SEdward Tomasz Napierala ISER_TASK_STATUS_STARTED, 2014814a0a4SEdward Tomasz Napierala ISER_TASK_STATUS_COMPLETED 2024814a0a4SEdward Tomasz Napierala }; 2034814a0a4SEdward Tomasz Napierala 2044814a0a4SEdward Tomasz Napierala enum iser_data_dir { 2054814a0a4SEdward Tomasz Napierala ISER_DIR_IN = 0, /* to initiator */ 2064814a0a4SEdward Tomasz Napierala ISER_DIR_OUT, /* from initiator */ 2074814a0a4SEdward Tomasz Napierala ISER_DIRS_NUM 2084814a0a4SEdward Tomasz Napierala }; 2094814a0a4SEdward Tomasz Napierala 2104814a0a4SEdward Tomasz Napierala /** 2114814a0a4SEdward Tomasz Napierala * struct iser_mem_reg - iSER memory registration info 2124814a0a4SEdward Tomasz Napierala * 2134814a0a4SEdward Tomasz Napierala * @sge: memory region sg element 2144814a0a4SEdward Tomasz Napierala * @rkey: memory region remote key 2154814a0a4SEdward Tomasz Napierala * @mem_h: pointer to registration context (FMR/Fastreg) 2164814a0a4SEdward Tomasz Napierala */ 2174814a0a4SEdward Tomasz Napierala struct iser_mem_reg { 2184814a0a4SEdward Tomasz Napierala struct ib_sge sge; 2194814a0a4SEdward Tomasz Napierala u32 rkey; 2204814a0a4SEdward Tomasz Napierala void *mem_h; 2214814a0a4SEdward Tomasz Napierala }; 2224814a0a4SEdward Tomasz Napierala 2234814a0a4SEdward Tomasz Napierala enum iser_desc_type { 2244814a0a4SEdward Tomasz Napierala ISCSI_TX_CONTROL , 2254814a0a4SEdward Tomasz Napierala ISCSI_TX_SCSI_COMMAND, 2264814a0a4SEdward Tomasz Napierala ISCSI_TX_DATAOUT 2274814a0a4SEdward Tomasz Napierala }; 2284814a0a4SEdward Tomasz Napierala 2294814a0a4SEdward Tomasz Napierala /** 2304814a0a4SEdward Tomasz Napierala * struct iser_data_buf - iSER data buffer 2314814a0a4SEdward Tomasz Napierala * 2324814a0a4SEdward Tomasz Napierala * @sg: pointer to the sg list 2334814a0a4SEdward Tomasz Napierala * @size: num entries of this sg 2344814a0a4SEdward Tomasz Napierala * @data_len: total beffer byte len 2354814a0a4SEdward Tomasz Napierala * @dma_nents: returned by dma_map_sg 2364814a0a4SEdward Tomasz Napierala * @copy_buf: allocated copy buf for SGs unaligned 2374814a0a4SEdward Tomasz Napierala * for rdma which are copied 2384814a0a4SEdward Tomasz Napierala * @orig_sg: pointer to the original sg list (in case 2394814a0a4SEdward Tomasz Napierala * we used a copy) 2404814a0a4SEdward Tomasz Napierala * @sg_single: SG-ified clone of a non SG SC or 2414814a0a4SEdward Tomasz Napierala * unaligned SG 2424814a0a4SEdward Tomasz Napierala */ 2434814a0a4SEdward Tomasz Napierala struct iser_data_buf { 2444814a0a4SEdward Tomasz Napierala struct scatterlist sgl[ISCSI_ISER_SG_TABLESIZE]; 2454814a0a4SEdward Tomasz Napierala void *sg; 246*41dbd9ddSHans Petter Selasky int size; 2474814a0a4SEdward Tomasz Napierala unsigned long data_len; 2484814a0a4SEdward Tomasz Napierala unsigned int dma_nents; 2494814a0a4SEdward Tomasz Napierala char *copy_buf; 2504814a0a4SEdward Tomasz Napierala struct scatterlist *orig_sg; 2514814a0a4SEdward Tomasz Napierala struct scatterlist sg_single; 2524814a0a4SEdward Tomasz Napierala }; 2534814a0a4SEdward Tomasz Napierala 2544814a0a4SEdward Tomasz Napierala /* fwd declarations */ 2554814a0a4SEdward Tomasz Napierala struct iser_conn; 2564814a0a4SEdward Tomasz Napierala struct ib_conn; 2574814a0a4SEdward Tomasz Napierala struct iser_device; 2584814a0a4SEdward Tomasz Napierala 2594814a0a4SEdward Tomasz Napierala /** 2604814a0a4SEdward Tomasz Napierala * struct iser_tx_desc - iSER TX descriptor (for send wr_id) 2614814a0a4SEdward Tomasz Napierala * 2624814a0a4SEdward Tomasz Napierala * @iser_header: iser header 2634814a0a4SEdward Tomasz Napierala * @iscsi_header: iscsi header (bhs) 2644814a0a4SEdward Tomasz Napierala * @type: command/control/dataout 2654814a0a4SEdward Tomasz Napierala * @dma_addr: header buffer dma_address 2664814a0a4SEdward Tomasz Napierala * @tx_sg: sg[0] points to iser/iscsi headers 2674814a0a4SEdward Tomasz Napierala * sg[1] optionally points to either of immediate data 2684814a0a4SEdward Tomasz Napierala * unsolicited data-out or control 2694814a0a4SEdward Tomasz Napierala * @num_sge: number sges used on this TX task 2704814a0a4SEdward Tomasz Napierala * @mapped: indicates if the descriptor is dma mapped 2714814a0a4SEdward Tomasz Napierala */ 2724814a0a4SEdward Tomasz Napierala struct iser_tx_desc { 2734814a0a4SEdward Tomasz Napierala struct iser_hdr iser_header; 2744814a0a4SEdward Tomasz Napierala struct iscsi_bhs iscsi_header __attribute__((packed)); 2754814a0a4SEdward Tomasz Napierala enum iser_desc_type type; 2764814a0a4SEdward Tomasz Napierala u64 dma_addr; 2774814a0a4SEdward Tomasz Napierala struct ib_sge tx_sg[2]; 2784814a0a4SEdward Tomasz Napierala int num_sge; 2794814a0a4SEdward Tomasz Napierala bool mapped; 2804814a0a4SEdward Tomasz Napierala }; 2814814a0a4SEdward Tomasz Napierala 2824814a0a4SEdward Tomasz Napierala #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ 2834814a0a4SEdward Tomasz Napierala sizeof(u64) + sizeof(struct ib_sge))) 2844814a0a4SEdward Tomasz Napierala /** 2854814a0a4SEdward Tomasz Napierala * struct iser_rx_desc - iSER RX descriptor (for recv wr_id) 2864814a0a4SEdward Tomasz Napierala * 2874814a0a4SEdward Tomasz Napierala * @iser_header: iser header 2884814a0a4SEdward Tomasz Napierala * @iscsi_header: iscsi header 2894814a0a4SEdward Tomasz Napierala * @data: received data segment 2904814a0a4SEdward Tomasz Napierala * @dma_addr: receive buffer dma address 2914814a0a4SEdward Tomasz Napierala * @rx_sg: ib_sge of receive buffer 2924814a0a4SEdward Tomasz Napierala * @pad: for sense data TODO: Modify to maximum sense length supported 2934814a0a4SEdward Tomasz Napierala */ 2944814a0a4SEdward Tomasz Napierala struct iser_rx_desc { 2954814a0a4SEdward Tomasz Napierala struct iser_hdr iser_header; 2964814a0a4SEdward Tomasz Napierala struct iscsi_bhs iscsi_header; 2974814a0a4SEdward Tomasz Napierala char data[ISER_RECV_DATA_SEG_LEN]; 2984814a0a4SEdward Tomasz Napierala u64 dma_addr; 2994814a0a4SEdward Tomasz Napierala struct ib_sge rx_sg; 3004814a0a4SEdward Tomasz Napierala char pad[ISER_RX_PAD_SIZE]; 3014814a0a4SEdward Tomasz Napierala } __attribute__((packed)); 3024814a0a4SEdward Tomasz Napierala 3034814a0a4SEdward Tomasz Napierala struct icl_iser_pdu { 3044814a0a4SEdward Tomasz Napierala struct icl_pdu icl_pdu; 3054814a0a4SEdward Tomasz Napierala struct iser_tx_desc desc; 3064814a0a4SEdward Tomasz Napierala struct iser_conn *iser_conn; 3074814a0a4SEdward Tomasz Napierala enum iser_task_status status; 3084814a0a4SEdward Tomasz Napierala struct ccb_scsiio *csio; 3094814a0a4SEdward Tomasz Napierala int command_sent; 3104814a0a4SEdward Tomasz Napierala int dir[ISER_DIRS_NUM]; 3114814a0a4SEdward Tomasz Napierala struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; 3124814a0a4SEdward Tomasz Napierala struct iser_data_buf data[ISER_DIRS_NUM]; 3134814a0a4SEdward Tomasz Napierala }; 3144814a0a4SEdward Tomasz Napierala 3154814a0a4SEdward Tomasz Napierala /** 3164814a0a4SEdward Tomasz Napierala * struct iser_comp - iSER completion context 3174814a0a4SEdward Tomasz Napierala * 3184814a0a4SEdward Tomasz Napierala * @device: pointer to device handle 3194814a0a4SEdward Tomasz Napierala * @cq: completion queue 3204814a0a4SEdward Tomasz Napierala * @wcs: work completion array 3214814a0a4SEdward Tomasz Napierala * @tq: taskqueue handle 3224814a0a4SEdward Tomasz Napierala * @task: task to run task_fn 3234814a0a4SEdward Tomasz Napierala * @active_qps: Number of active QPs attached 3244814a0a4SEdward Tomasz Napierala * to completion context 3254814a0a4SEdward Tomasz Napierala */ 3264814a0a4SEdward Tomasz Napierala struct iser_comp { 3274814a0a4SEdward Tomasz Napierala struct iser_device *device; 3284814a0a4SEdward Tomasz Napierala struct ib_cq *cq; 3294814a0a4SEdward Tomasz Napierala struct ib_wc wcs[ISER_WC_BATCH_COUNT]; 3304814a0a4SEdward Tomasz Napierala struct taskqueue *tq; 3314814a0a4SEdward Tomasz Napierala struct task task; 3324814a0a4SEdward Tomasz Napierala int active_qps; 3334814a0a4SEdward Tomasz Napierala }; 3344814a0a4SEdward Tomasz Napierala 3354814a0a4SEdward Tomasz Napierala /** 3364814a0a4SEdward Tomasz Napierala * struct iser_device - iSER device handle 3374814a0a4SEdward Tomasz Napierala * 3384814a0a4SEdward Tomasz Napierala * @ib_device: RDMA device 3394814a0a4SEdward Tomasz Napierala * @pd: Protection Domain for this device 3404814a0a4SEdward Tomasz Napierala * @dev_attr: Device attributes container 3414814a0a4SEdward Tomasz Napierala * @mr: Global DMA memory region 3424814a0a4SEdward Tomasz Napierala * @event_handler: IB events handle routine 3434814a0a4SEdward Tomasz Napierala * @ig_list: entry in devices list 3444814a0a4SEdward Tomasz Napierala * @refcount: Reference counter, dominated by open iser connections 3454814a0a4SEdward Tomasz Napierala * @comps_used: Number of completion contexts used, Min between online 3464814a0a4SEdward Tomasz Napierala * cpus and device max completion vectors 3474814a0a4SEdward Tomasz Napierala * @comps: Dinamically allocated array of completion handlers 3484814a0a4SEdward Tomasz Napierala */ 3494814a0a4SEdward Tomasz Napierala struct iser_device { 3504814a0a4SEdward Tomasz Napierala struct ib_device *ib_device; 3514814a0a4SEdward Tomasz Napierala struct ib_pd *pd; 3524814a0a4SEdward Tomasz Napierala struct ib_device_attr dev_attr; 3534814a0a4SEdward Tomasz Napierala struct ib_mr *mr; 3544814a0a4SEdward Tomasz Napierala struct ib_event_handler event_handler; 3554814a0a4SEdward Tomasz Napierala struct list_head ig_list; 3564814a0a4SEdward Tomasz Napierala int refcount; 3574814a0a4SEdward Tomasz Napierala int comps_used; 3584814a0a4SEdward Tomasz Napierala struct iser_comp *comps; 3594814a0a4SEdward Tomasz Napierala }; 3604814a0a4SEdward Tomasz Napierala 3614814a0a4SEdward Tomasz Napierala /** 3624814a0a4SEdward Tomasz Napierala * struct iser_reg_resources - Fast registration recources 3634814a0a4SEdward Tomasz Napierala * 3644814a0a4SEdward Tomasz Napierala * @mr: memory region 3654814a0a4SEdward Tomasz Napierala * @mr_valid: is mr valid indicator 3664814a0a4SEdward Tomasz Napierala */ 3674814a0a4SEdward Tomasz Napierala struct iser_reg_resources { 3684814a0a4SEdward Tomasz Napierala struct ib_mr *mr; 3694814a0a4SEdward Tomasz Napierala u8 mr_valid:1; 3704814a0a4SEdward Tomasz Napierala }; 3714814a0a4SEdward Tomasz Napierala 3724814a0a4SEdward Tomasz Napierala /** 3734814a0a4SEdward Tomasz Napierala * struct fast_reg_descriptor - Fast registration descriptor 3744814a0a4SEdward Tomasz Napierala * 3754814a0a4SEdward Tomasz Napierala * @list: entry in connection fastreg pool 3764814a0a4SEdward Tomasz Napierala * @rsc: data buffer registration resources 3774814a0a4SEdward Tomasz Napierala */ 3784814a0a4SEdward Tomasz Napierala struct fast_reg_descriptor { 3794814a0a4SEdward Tomasz Napierala struct list_head list; 3804814a0a4SEdward Tomasz Napierala struct iser_reg_resources rsc; 3814814a0a4SEdward Tomasz Napierala }; 3824814a0a4SEdward Tomasz Napierala 3834814a0a4SEdward Tomasz Napierala 3844814a0a4SEdward Tomasz Napierala /** 3854814a0a4SEdward Tomasz Napierala * struct iser_beacon - beacon to signal all flush errors were drained 3864814a0a4SEdward Tomasz Napierala * 3874814a0a4SEdward Tomasz Napierala * @send: send wr 3884814a0a4SEdward Tomasz Napierala * @recv: recv wr 3894814a0a4SEdward Tomasz Napierala * @flush_lock: protects flush_cv 3904814a0a4SEdward Tomasz Napierala * @flush_cv: condition variable for beacon flush 3914814a0a4SEdward Tomasz Napierala */ 3924814a0a4SEdward Tomasz Napierala struct iser_beacon { 3934814a0a4SEdward Tomasz Napierala union { 3944814a0a4SEdward Tomasz Napierala struct ib_send_wr send; 3954814a0a4SEdward Tomasz Napierala struct ib_recv_wr recv; 3964814a0a4SEdward Tomasz Napierala }; 3974814a0a4SEdward Tomasz Napierala struct mtx flush_lock; 3984814a0a4SEdward Tomasz Napierala struct cv flush_cv; 3994814a0a4SEdward Tomasz Napierala }; 4004814a0a4SEdward Tomasz Napierala 4014814a0a4SEdward Tomasz Napierala /** 4024814a0a4SEdward Tomasz Napierala * struct ib_conn - Infiniband related objects 4034814a0a4SEdward Tomasz Napierala * 4044814a0a4SEdward Tomasz Napierala * @cma_id: rdma_cm connection maneger handle 4054814a0a4SEdward Tomasz Napierala * @qp: Connection Queue-pair 4064814a0a4SEdward Tomasz Napierala * @device: reference to iser device 4074814a0a4SEdward Tomasz Napierala * @comp: iser completion context 4084814a0a4SEdward Tomasz Napierala */ 4094814a0a4SEdward Tomasz Napierala struct ib_conn { 4104814a0a4SEdward Tomasz Napierala struct rdma_cm_id *cma_id; 4114814a0a4SEdward Tomasz Napierala struct ib_qp *qp; 4124814a0a4SEdward Tomasz Napierala int post_recv_buf_count; 4134814a0a4SEdward Tomasz Napierala u8 sig_count; 4144814a0a4SEdward Tomasz Napierala struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; 4154814a0a4SEdward Tomasz Napierala struct iser_device *device; 4164814a0a4SEdward Tomasz Napierala struct iser_comp *comp; 4174814a0a4SEdward Tomasz Napierala struct iser_beacon beacon; 4184814a0a4SEdward Tomasz Napierala struct mtx lock; 4194814a0a4SEdward Tomasz Napierala union { 4204814a0a4SEdward Tomasz Napierala struct { 4214814a0a4SEdward Tomasz Napierala struct ib_fmr_pool *pool; 4224814a0a4SEdward Tomasz Napierala struct iser_page_vec *page_vec; 4234814a0a4SEdward Tomasz Napierala } fmr; 4244814a0a4SEdward Tomasz Napierala struct { 4254814a0a4SEdward Tomasz Napierala struct list_head pool; 4264814a0a4SEdward Tomasz Napierala int pool_size; 4274814a0a4SEdward Tomasz Napierala } fastreg; 4284814a0a4SEdward Tomasz Napierala }; 4294814a0a4SEdward Tomasz Napierala }; 4304814a0a4SEdward Tomasz Napierala 4314814a0a4SEdward Tomasz Napierala struct iser_conn { 4324814a0a4SEdward Tomasz Napierala struct icl_conn icl_conn; 4334814a0a4SEdward Tomasz Napierala struct ib_conn ib_conn; 4344814a0a4SEdward Tomasz Napierala struct cv up_cv; 4354814a0a4SEdward Tomasz Napierala struct list_head conn_list; 4364814a0a4SEdward Tomasz Napierala struct sx state_mutex; 4374814a0a4SEdward Tomasz Napierala enum iser_conn_state state; 4384814a0a4SEdward Tomasz Napierala int qp_max_recv_dtos; 4394814a0a4SEdward Tomasz Napierala int min_posted_rx; 4404814a0a4SEdward Tomasz Napierala u16 max_cmds; 4414814a0a4SEdward Tomasz Napierala char *login_buf; 4424814a0a4SEdward Tomasz Napierala char *login_req_buf, *login_resp_buf; 4434814a0a4SEdward Tomasz Napierala u64 login_req_dma, login_resp_dma; 4444814a0a4SEdward Tomasz Napierala unsigned int rx_desc_head; 4454814a0a4SEdward Tomasz Napierala struct iser_rx_desc *rx_descs; 4464814a0a4SEdward Tomasz Napierala u32 num_rx_descs; 44795c4a392SEdward Tomasz Napierala bool handoff_done; 4484814a0a4SEdward Tomasz Napierala }; 4494814a0a4SEdward Tomasz Napierala 4504814a0a4SEdward Tomasz Napierala /** 4514814a0a4SEdward Tomasz Napierala * struct iser_global: iSER global context 4524814a0a4SEdward Tomasz Napierala * 4534814a0a4SEdward Tomasz Napierala * @device_list_mutex: protects device_list 4544814a0a4SEdward Tomasz Napierala * @device_list: iser devices global list 4554814a0a4SEdward Tomasz Napierala * @connlist_mutex: protects connlist 4564814a0a4SEdward Tomasz Napierala * @connlist: iser connections global list 4574814a0a4SEdward Tomasz Napierala * @desc_cache: kmem cache for tx dataout 4584814a0a4SEdward Tomasz Napierala * @close_conns_mutex: serializes conns closure 4594814a0a4SEdward Tomasz Napierala */ 4604814a0a4SEdward Tomasz Napierala struct iser_global { 4614814a0a4SEdward Tomasz Napierala struct sx device_list_mutex; 4624814a0a4SEdward Tomasz Napierala struct list_head device_list; 4634814a0a4SEdward Tomasz Napierala struct mtx connlist_mutex; 4644814a0a4SEdward Tomasz Napierala struct list_head connlist; 4654814a0a4SEdward Tomasz Napierala struct sx close_conns_mutex; 4664814a0a4SEdward Tomasz Napierala }; 4674814a0a4SEdward Tomasz Napierala 4684814a0a4SEdward Tomasz Napierala extern struct iser_global ig; 4694814a0a4SEdward Tomasz Napierala extern int iser_debug; 4704814a0a4SEdward Tomasz Napierala 4714814a0a4SEdward Tomasz Napierala void 4724814a0a4SEdward Tomasz Napierala iser_create_send_desc(struct iser_conn *, struct iser_tx_desc *); 4734814a0a4SEdward Tomasz Napierala 4744814a0a4SEdward Tomasz Napierala int 4754814a0a4SEdward Tomasz Napierala iser_post_recvl(struct iser_conn *); 4764814a0a4SEdward Tomasz Napierala 4774814a0a4SEdward Tomasz Napierala int 4784814a0a4SEdward Tomasz Napierala iser_post_recvm(struct iser_conn *, int); 4794814a0a4SEdward Tomasz Napierala 4804814a0a4SEdward Tomasz Napierala int 4814814a0a4SEdward Tomasz Napierala iser_alloc_login_buf(struct iser_conn *iser_conn); 4824814a0a4SEdward Tomasz Napierala 4834814a0a4SEdward Tomasz Napierala void 4844814a0a4SEdward Tomasz Napierala iser_free_login_buf(struct iser_conn *iser_conn); 4854814a0a4SEdward Tomasz Napierala 4864814a0a4SEdward Tomasz Napierala int 4874814a0a4SEdward Tomasz Napierala iser_post_send(struct ib_conn *, struct iser_tx_desc *, bool); 4884814a0a4SEdward Tomasz Napierala 4894814a0a4SEdward Tomasz Napierala void 4904814a0a4SEdward Tomasz Napierala iser_snd_completion(struct iser_tx_desc *, struct ib_conn *); 4914814a0a4SEdward Tomasz Napierala 4924814a0a4SEdward Tomasz Napierala void 4934814a0a4SEdward Tomasz Napierala iser_rcv_completion(struct iser_rx_desc *, unsigned long, 4944814a0a4SEdward Tomasz Napierala struct ib_conn *); 4954814a0a4SEdward Tomasz Napierala 4964814a0a4SEdward Tomasz Napierala void 4974814a0a4SEdward Tomasz Napierala iser_pdu_free(struct icl_conn *, struct icl_pdu *); 4984814a0a4SEdward Tomasz Napierala 4994814a0a4SEdward Tomasz Napierala struct icl_pdu * 5004814a0a4SEdward Tomasz Napierala iser_new_pdu(struct icl_conn *ic, int flags); 5014814a0a4SEdward Tomasz Napierala 5024814a0a4SEdward Tomasz Napierala int 5034814a0a4SEdward Tomasz Napierala iser_alloc_rx_descriptors(struct iser_conn *, int); 5044814a0a4SEdward Tomasz Napierala 5054814a0a4SEdward Tomasz Napierala void 5064814a0a4SEdward Tomasz Napierala iser_free_rx_descriptors(struct iser_conn *); 5074814a0a4SEdward Tomasz Napierala 5084814a0a4SEdward Tomasz Napierala int 5094814a0a4SEdward Tomasz Napierala iser_initialize_headers(struct icl_iser_pdu *, struct iser_conn *); 5104814a0a4SEdward Tomasz Napierala 5114814a0a4SEdward Tomasz Napierala int 5124814a0a4SEdward Tomasz Napierala iser_send_control(struct iser_conn *, struct icl_iser_pdu *); 5134814a0a4SEdward Tomasz Napierala 5144814a0a4SEdward Tomasz Napierala int 5154814a0a4SEdward Tomasz Napierala iser_send_command(struct iser_conn *, struct icl_iser_pdu *); 5164814a0a4SEdward Tomasz Napierala 5174814a0a4SEdward Tomasz Napierala int 5184814a0a4SEdward Tomasz Napierala iser_reg_rdma_mem(struct icl_iser_pdu *, enum iser_data_dir); 5194814a0a4SEdward Tomasz Napierala 5204814a0a4SEdward Tomasz Napierala void 5214814a0a4SEdward Tomasz Napierala iser_unreg_rdma_mem(struct icl_iser_pdu *, enum iser_data_dir); 5224814a0a4SEdward Tomasz Napierala 5234814a0a4SEdward Tomasz Napierala int 5244814a0a4SEdward Tomasz Napierala iser_create_fastreg_pool(struct ib_conn *, unsigned); 5254814a0a4SEdward Tomasz Napierala 5264814a0a4SEdward Tomasz Napierala void 5274814a0a4SEdward Tomasz Napierala iser_free_fastreg_pool(struct ib_conn *); 5284814a0a4SEdward Tomasz Napierala 5294814a0a4SEdward Tomasz Napierala int 5304814a0a4SEdward Tomasz Napierala iser_dma_map_task_data(struct icl_iser_pdu *, 5314814a0a4SEdward Tomasz Napierala struct iser_data_buf *, enum iser_data_dir, 5324814a0a4SEdward Tomasz Napierala enum dma_data_direction); 5334814a0a4SEdward Tomasz Napierala 5344814a0a4SEdward Tomasz Napierala int 5354814a0a4SEdward Tomasz Napierala iser_conn_terminate(struct iser_conn *); 5364814a0a4SEdward Tomasz Napierala 5374814a0a4SEdward Tomasz Napierala void 5384814a0a4SEdward Tomasz Napierala iser_free_ib_conn_res(struct iser_conn *, bool); 5394814a0a4SEdward Tomasz Napierala 5404814a0a4SEdward Tomasz Napierala void 5414814a0a4SEdward Tomasz Napierala iser_dma_unmap_task_data(struct icl_iser_pdu *, struct iser_data_buf *, 5424814a0a4SEdward Tomasz Napierala enum dma_data_direction); 5434814a0a4SEdward Tomasz Napierala 5444814a0a4SEdward Tomasz Napierala int 5454814a0a4SEdward Tomasz Napierala iser_cma_handler(struct rdma_cm_id *, struct rdma_cm_event *); 5464814a0a4SEdward Tomasz Napierala 5474814a0a4SEdward Tomasz Napierala #endif /* !ICL_ISER_H */ 548