/* * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management * * Copyright (C) 2003-2015 Chelsio Communications. All rights reserved. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this * release for licensing terms and conditions. * * Written by: Dimitris Michailidis (dm@chelsio.com) * Karen Xie (kxie@chelsio.com) */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ #include #include #include #include "common.h" #include "t3_cpl.h" #include "t3cdev.h" #include "cxgb3_defs.h" #include "cxgb3_ctl_defs.h" #include "cxgb3_offload.h" #include "firmware_exports.h" #include "cxgb3i.h" static unsigned int dbg_level; #include "../libcxgbi.h" #define DRV_MODULE_NAME "cxgb3i" #define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver" #define DRV_MODULE_VERSION "2.0.1-ko" #define DRV_MODULE_RELDATE "Apr. 2015" static char version[] = DRV_MODULE_DESC " " DRV_MODULE_NAME " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; MODULE_AUTHOR("Chelsio Communications, Inc."); MODULE_DESCRIPTION(DRV_MODULE_DESC); MODULE_VERSION(DRV_MODULE_VERSION); MODULE_LICENSE("GPL"); module_param(dbg_level, uint, 0644); MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); static int cxgb3i_rcv_win = 256 * 1024; module_param(cxgb3i_rcv_win, int, 0644); MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); static int cxgb3i_snd_win = 128 * 1024; module_param(cxgb3i_snd_win, int, 0644); MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); static int cxgb3i_rx_credit_thres = 10 * 1024; module_param(cxgb3i_rx_credit_thres, int, 0644); MODULE_PARM_DESC(cxgb3i_rx_credit_thres, "RX credits return threshold in bytes (default=10KB)"); static unsigned int cxgb3i_max_connect = 8 * 1024; module_param(cxgb3i_max_connect, uint, 0644); MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); static unsigned int cxgb3i_sport_base = 20000; module_param(cxgb3i_sport_base, uint, 0644); MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); static void cxgb3i_dev_open(struct t3cdev *); static void cxgb3i_dev_close(struct t3cdev *); static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); static struct cxgb3_client t3_client = { .name = DRV_MODULE_NAME, .handlers = cxgb3i_cpl_handlers, .add = cxgb3i_dev_open, .remove = cxgb3i_dev_close, .event_handler = cxgb3i_dev_event_handler, }; static const struct scsi_host_template cxgb3i_host_template = { .module = THIS_MODULE, .name = DRV_MODULE_NAME, .proc_name = DRV_MODULE_NAME, .can_queue = CXGB3I_SCSI_HOST_QDEPTH, .queuecommand = iscsi_queuecommand, .change_queue_depth = scsi_change_queue_depth, .sg_tablesize = SG_ALL, .max_sectors = 0xFFFF, .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, .eh_timed_out = iscsi_eh_cmd_timed_out, .eh_abort_handler = iscsi_eh_abort, .eh_device_reset_handler = iscsi_eh_device_reset, .eh_target_reset_handler = iscsi_eh_recover_target, .target_alloc = iscsi_target_alloc, .dma_boundary = PAGE_SIZE - 1, .this_id = -1, .track_queue_depth = 1, .cmd_size = sizeof(struct iscsi_cmd), }; static struct iscsi_transport cxgb3i_iscsi_transport = { .owner = THIS_MODULE, .name = DRV_MODULE_NAME, /* owner and name should be set already */ .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | CAP_DATADGST | CAP_DIGEST_OFFLOAD | CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, .attr_is_visible = cxgbi_attr_is_visible, .get_host_param = cxgbi_get_host_param, .set_host_param = cxgbi_set_host_param, /* session management */ .create_session = cxgbi_create_session, .destroy_session = cxgbi_destroy_session, .get_session_param = iscsi_session_get_param, /* connection management */ .create_conn = cxgbi_create_conn, .bind_conn = cxgbi_bind_conn, .unbind_conn = iscsi_conn_unbind, .destroy_conn = iscsi_tcp_conn_teardown, .start_conn = iscsi_conn_start, .stop_conn = iscsi_conn_stop, .get_conn_param = iscsi_conn_get_param, .set_param = cxgbi_set_conn_param, .get_stats = cxgbi_get_conn_stats, /* pdu xmit req from user space */ .send_pdu = iscsi_conn_send_pdu, /* task */ .init_task = iscsi_tcp_task_init, .xmit_task = iscsi_tcp_task_xmit, .cleanup_task = cxgbi_cleanup_task, /* pdu */ .alloc_pdu = cxgbi_conn_alloc_pdu, .init_pdu = cxgbi_conn_init_pdu, .xmit_pdu = cxgbi_conn_xmit_pdu, .parse_pdu_itt = cxgbi_parse_pdu_itt, /* TCP connect/disconnect */ .get_ep_param = cxgbi_get_ep_param, .ep_connect = cxgbi_ep_connect, .ep_poll = cxgbi_ep_poll, .ep_disconnect = cxgbi_ep_disconnect, /* Error recovery timeout call */ .session_recovery_timedout = iscsi_session_recovery_timedout, }; static struct scsi_transport_template *cxgb3i_stt; /* * CPL (Chelsio Protocol Language) defines a message passing interface between * the host driver and Chelsio asic. * The section below implments CPLs that related to iscsi tcp connection * open/close/abort and data send/receive. */ static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, const struct l2t_entry *e) { unsigned int wscale = cxgbi_sock_compute_wscale(csk->rcv_win); struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; skb->priority = CPL_PRIORITY_SETUP; req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); req->local_port = csk->saddr.sin_port; req->peer_port = csk->daddr.sin_port; req->local_ip = csk->saddr.sin_addr.s_addr; req->peer_ip = csk->daddr.sin_addr.s_addr; req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | V_RCV_BUFSIZ(csk->rcv_win >> 10)); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", csk, csk->state, csk->flags, csk->atid, &req->local_ip, ntohs(req->local_port), &req->peer_ip, ntohs(req->peer_port), csk->mss_idx, e->idx, e->smt_idx); l2t_send(csk->cdev->lldev, skb, csk->l2t); } static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) { cxgbi_sock_act_open_req_arp_failure(NULL, skb); } /* * CPL connection close request: host -> * * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to * the write queue (i.e., after any unsent txt data). */ static void send_close_req(struct cxgbi_sock *csk) { struct sk_buff *skb = csk->cpl_close; struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; unsigned int tid = csk->tid; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", csk, csk->state, csk->flags, csk->tid); csk->cpl_close = NULL; req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); req->wr.wr_lo = htonl(V_WR_TID(tid)); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); req->rsvd = htonl(csk->write_seq); cxgbi_sock_skb_entail(csk, skb); if (csk->state >= CTP_ESTABLISHED) push_tx_frames(csk, 1); } /* * CPL connection abort request: host -> * * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs * for the same connection and also that we do not try to send a message * after the connection has closed. */ static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) { struct cpl_abort_req *req = cplhdr(skb); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "t3dev 0x%p, tid %u, skb 0x%p.\n", tdev, GET_TID(req), skb); req->cmd = CPL_ABORT_NO_RST; cxgb3_ofld_send(tdev, skb); } static void send_abort_req(struct cxgbi_sock *csk) { struct sk_buff *skb = csk->cpl_abort_req; struct cpl_abort_req *req; if (unlikely(csk->state == CTP_ABORTING || !skb)) return; cxgbi_sock_set_state(csk, CTP_ABORTING); cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); /* Purge the send queue so we don't send anything after an abort. */ cxgbi_sock_purge_write_queue(csk); csk->cpl_abort_req = NULL; req = (struct cpl_abort_req *)skb->head; skb->priority = CPL_PRIORITY_DATA; set_arp_failure_handler(skb, abort_arp_failure); req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); req->rsvd0 = htonl(csk->snd_nxt); req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); req->cmd = CPL_ABORT_SEND_RST; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, req->rsvd1); l2t_send(csk->cdev->lldev, skb, csk->l2t); } /* * CPL connection abort reply: host -> * * Send an ABORT_RPL message in response of the ABORT_REQ received. */ static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) { struct sk_buff *skb = csk->cpl_abort_rpl; struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u, status %d.\n", csk, csk->state, csk->flags, csk->tid, rst_status); csk->cpl_abort_rpl = NULL; skb->priority = CPL_PRIORITY_DATA; rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); rpl->cmd = rst_status; cxgb3_ofld_send(csk->cdev->lldev, skb); } /* * CPL connection rx data ack: host -> * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of * credits sent. */ static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) { struct sk_buff *skb; struct cpl_rx_data_ack *req; u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n", csk, csk->state, csk->flags, csk->tid, credits, dack); skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); if (!skb) { pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); return 0; } req = (struct cpl_rx_data_ack *)skb->head; req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | V_RX_CREDITS(credits)); skb->priority = CPL_PRIORITY_ACK; cxgb3_ofld_send(csk->cdev->lldev, skb); return credits; } /* * CPL connection tx data: host -> * * Send iscsi PDU via TX_DATA CPL message. Returns the number of * credits sent. * Each TX_DATA consumes work request credit (wrs), so we need to keep track of * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). */ static unsigned int wrlen __read_mostly; static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; static void init_wr_tab(unsigned int wr_len) { int i; if (skb_wrs[1]) /* already initialized */ return; for (i = 1; i < SKB_WR_LIST_SIZE; i++) { int sgl_len = (3 * i) / 2 + (i & 1); sgl_len += 3; skb_wrs[i] = (sgl_len <= wr_len ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); } wrlen = wr_len * 8; } static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int len, int req_completion) { struct tx_data_wr *req; struct l2t_entry *l2t = csk->l2t; skb_reset_transport_header(skb); req = __skb_push(skb, sizeof(*req)); req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | (req_completion ? F_WR_COMPL : 0)); req->wr_lo = htonl(V_WR_TID(csk->tid)); /* len includes the length of any HW ULP additions */ req->len = htonl(len); /* V_TX_ULP_SUBMODE sets both the mode and submode */ req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_tx_ulp_mode(skb)) | V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); req->sndseq = htonl(csk->snd_nxt); req->param = htonl(V_TX_PORT(l2t->smt_idx)); if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | V_TX_CPU_IDX(csk->rss_qid)); /* sendbuffer is in units of 32KB. */ req->param |= htonl(V_TX_SNDBUF(csk->snd_win >> 15)); cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); } } /* * push_tx_frames -- start transmit * * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a * connection's send queue and sends them on to T3. Must be called with the * connection's lock held. Returns the amount of send buffer space that was * freed as a result of sending queued data to T3. */ static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) { kfree_skb(skb); } static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) { int total_size = 0; struct sk_buff *skb; if (unlikely(csk->state < CTP_ESTABLISHED || csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, "csk 0x%p,%u,0x%lx,%u, in closing state.\n", csk, csk->state, csk->flags, csk->tid); return 0; } while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { int len = skb->len; /* length before skb_push */ int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); int wrs_needed = skb_wrs[frags]; if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) wrs_needed = 1; WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); if (csk->wr_cred < wrs_needed) { log_debug(1 << CXGBI_DBG_PDU_TX, "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n", csk, skb->len, skb->data_len, frags, wrs_needed, csk->wr_cred); break; } __skb_unlink(skb, &csk->write_queue); skb->priority = CPL_PRIORITY_DATA; skb->csum = wrs_needed; /* remember this until the WR_ACK */ csk->wr_cred -= wrs_needed; csk->wr_una_cred += wrs_needed; cxgbi_sock_enqueue_wr(csk, skb); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, " "left %u, unack %u.\n", csk, skb->len, skb->data_len, frags, skb->csum, csk->wr_cred, csk->wr_una_cred); if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { if ((req_completion && csk->wr_una_cred == wrs_needed) || csk->wr_una_cred >= csk->wr_max_cred / 2) { req_completion = 1; csk->wr_una_cred = 0; } len += cxgbi_ulp_extra_len(cxgbi_skcb_tx_ulp_mode(skb)); make_tx_data_wr(csk, skb, len, req_completion); csk->snd_nxt += len; cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); } total_size += skb->truesize; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, "csk 0x%p, tid 0x%x, send skb 0x%p.\n", csk, csk->tid, skb); set_arp_failure_handler(skb, arp_failure_skb_discard); l2t_send(csk->cdev->lldev, skb, csk->l2t); } return total_size; } /* * Process a CPL_ACT_ESTABLISH message: -> host * Updates connection state from an active establish CPL message. Runs with * the connection lock held. */ static inline void free_atid(struct cxgbi_sock *csk) { if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { cxgb3_free_atid(csk->cdev->lldev, csk->atid); cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); cxgbi_sock_put(csk); } } static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) { struct cxgbi_sock *csk = ctx; struct cpl_act_establish *req = cplhdr(skb); unsigned int tid = GET_TID(req); unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", atid, atid, csk, csk->state, csk->flags, rcv_isn); cxgbi_sock_get(csk); cxgbi_sock_set_flag(csk, CTPF_HAS_TID); csk->tid = tid; cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid); free_atid(csk); csk->rss_qid = G_QNUM(ntohs(skb->csum)); spin_lock_bh(&csk->lock); if (csk->retry_timer.function) { timer_delete(&csk->retry_timer); csk->retry_timer.function = NULL; } if (unlikely(csk->state != CTP_ACTIVE_OPEN)) pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", csk, csk->state, csk->flags, csk->tid); csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; if (csk->rcv_win > (M_RCV_BUFSIZ << 10)) csk->rcv_wup -= csk->rcv_win - (M_RCV_BUFSIZ << 10); cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) /* upper layer has requested closing */ send_abort_req(csk); else { if (skb_queue_len(&csk->write_queue)) push_tx_frames(csk, 1); cxgbi_conn_tx_open(csk); } spin_unlock_bh(&csk->lock); __kfree_skb(skb); return 0; } /* * Process a CPL_ACT_OPEN_RPL message: -> host * Handle active open failures. */ static int act_open_rpl_status_to_errno(int status) { switch (status) { case CPL_ERR_CONN_RESET: return -ECONNREFUSED; case CPL_ERR_ARP_MISS: return -EHOSTUNREACH; case CPL_ERR_CONN_TIMEDOUT: return -ETIMEDOUT; case CPL_ERR_TCAM_FULL: return -ENOMEM; case CPL_ERR_CONN_EXIST: return -EADDRINUSE; default: return -EIO; } } static void act_open_retry_timer(struct timer_list *t) { struct cxgbi_sock *csk = timer_container_of(csk, t, retry_timer); struct sk_buff *skb; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", csk, csk->state, csk->flags, csk->tid); cxgbi_sock_get(csk); spin_lock_bh(&csk->lock); skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); if (!skb) cxgbi_sock_fail_act_open(csk, -ENOMEM); else { skb->sk = (struct sock *)csk; set_arp_failure_handler(skb, act_open_arp_failure); send_act_open_req(csk, skb, csk->l2t); } spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); } static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) { struct cxgbi_sock *csk = ctx; struct cpl_act_open_rpl *rpl = cplhdr(skb); pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n", csk, csk->state, csk->flags, csk->atid, rpl->status, &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); if (rpl->status != CPL_ERR_TCAM_FULL && rpl->status != CPL_ERR_CONN_EXIST && rpl->status != CPL_ERR_ARP_MISS) cxgb3_queue_tid_release(tdev, GET_TID(rpl)); cxgbi_sock_get(csk); spin_lock_bh(&csk->lock); if (rpl->status == CPL_ERR_CONN_EXIST && csk->retry_timer.function != act_open_retry_timer) { csk->retry_timer.function = act_open_retry_timer; mod_timer(&csk->retry_timer, jiffies + HZ / 2); } else cxgbi_sock_fail_act_open(csk, act_open_rpl_status_to_errno(rpl->status)); spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); __kfree_skb(skb); return 0; } /* * Process PEER_CLOSE CPL messages: -> host * Handle peer FIN. */ static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) { struct cxgbi_sock *csk = ctx; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", csk, csk->state, csk->flags, csk->tid); cxgbi_sock_rcv_peer_close(csk); __kfree_skb(skb); return 0; } /* * Process CLOSE_CONN_RPL CPL message: -> host * Process a peer ACK to our FIN. */ static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) { struct cxgbi_sock *csk = ctx; struct cpl_close_con_rpl *rpl = cplhdr(skb); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u, snxt %u.\n", csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt)); cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); __kfree_skb(skb); return 0; } /* * Process ABORT_REQ_RSS CPL message: -> host * Process abort requests. If we are waiting for an ABORT_RPL we ignore this * request except that we need to reply to it. */ static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, int *need_rst) { switch (abort_reason) { case CPL_ERR_BAD_SYN: case CPL_ERR_CONN_RESET: return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET; case CPL_ERR_XMIT_TIMEDOUT: case CPL_ERR_PERSIST_TIMEDOUT: case CPL_ERR_FINWAIT2_TIMEDOUT: case CPL_ERR_KEEPALIVE_TIMEDOUT: return -ETIMEDOUT; default: return -EIO; } } static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) { const struct cpl_abort_req_rss *req = cplhdr(skb); struct cxgbi_sock *csk = ctx; int rst_status = CPL_ABORT_NO_RST; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", csk, csk->state, csk->flags, csk->tid); if (req->status == CPL_ERR_RTX_NEG_ADVICE || req->status == CPL_ERR_PERSIST_NEG_ADVICE) { goto done; } cxgbi_sock_get(csk); spin_lock_bh(&csk->lock); if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); cxgbi_sock_set_state(csk, CTP_ABORTING); goto out; } cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); send_abort_rpl(csk, rst_status); if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { csk->err = abort_status_to_errno(csk, req->status, &rst_status); cxgbi_sock_closed(csk); } out: spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); done: __kfree_skb(skb); return 0; } /* * Process ABORT_RPL_RSS CPL message: -> host * Process abort replies. We only process these messages if we anticipate * them as the coordination between SW and HW in this area is somewhat lacking * and sometimes we get ABORT_RPLs after we are done with the connection that * originated the ABORT_REQ. */ static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) { struct cpl_abort_rpl_rss *rpl = cplhdr(skb); struct cxgbi_sock *csk = ctx; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", rpl->status, csk, csk ? csk->state : 0, csk ? csk->flags : 0UL); /* * Ignore replies to post-close aborts indicating that the abort was * requested too late. These connections are terminated when we get * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss * arrives the TID is either no longer used or it has been recycled. */ if (rpl->status == CPL_ERR_ABORT_FAILED) goto rel_skb; /* * Sometimes we've already closed the connection, e.g., a post-close * abort races with ABORT_REQ_RSS, the latter frees the connection * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, * but FW turns the ABORT_REQ into a regular one and so we get * ABORT_RPL_RSS with status 0 and no connection. */ if (csk) cxgbi_sock_rcv_abort_rpl(csk); rel_skb: __kfree_skb(skb); return 0; } /* * Process RX_ISCSI_HDR CPL message: -> host * Handle received PDUs, the payload could be DDP'ed. If not, the payload * follow after the bhs. */ static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) { struct cxgbi_sock *csk = ctx; struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); struct cpl_iscsi_hdr_norss data_cpl; struct cpl_rx_data_ddp_norss ddp_cpl; unsigned int hdr_len, data_len, status; unsigned int len; int err; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n", csk, csk->state, csk->flags, csk->tid, skb, skb->len); spin_lock_bh(&csk->lock); if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u, bad state.\n", csk, csk->state, csk->flags, csk->tid); if (csk->state != CTP_ABORTING) goto abort_conn; else goto discard; } cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq); cxgbi_skcb_flags(skb) = 0; skb_reset_transport_header(skb); __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); len = hdr_len = ntohs(hdr_cpl->len); /* msg coalesce is off or not enough data received */ if (skb->len <= hdr_len) { pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n", csk->cdev->ports[csk->port_id]->name, csk->tid, skb->len, hdr_len); goto abort_conn; } cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED); err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, sizeof(ddp_cpl)); if (err < 0) { pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n", csk->cdev->ports[csk->port_id]->name, csk->tid, skb->len, sizeof(ddp_cpl), err); goto abort_conn; } cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len); cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); status = ntohl(ddp_cpl.ddp_status); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n", csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status); if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); if (skb->len > (hdr_len + sizeof(ddp_cpl))) { err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); if (err < 0) { pr_err("%s: tid %u, cp %zu/%u failed %d.\n", csk->cdev->ports[csk->port_id]->name, csk->tid, sizeof(data_cpl), skb->len, err); goto abort_conn; } data_len = ntohs(data_cpl.len); log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX, "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n", skb, data_len, cxgbi_skcb_rx_pdulen(skb), status); len += sizeof(data_cpl) + data_len; } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb); __pskb_trim(skb, len); __skb_queue_tail(&csk->receive_queue, skb); cxgbi_conn_pdu_ready(csk); spin_unlock_bh(&csk->lock); return 0; abort_conn: send_abort_req(csk); discard: spin_unlock_bh(&csk->lock); __kfree_skb(skb); return 0; } /* * Process TX_DATA_ACK CPL messages: -> host * Process an acknowledgment of WR completion. Advance snd_una and send the * next batch of work requests from the write queue. */ static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) { struct cxgbi_sock *csk = ctx; struct cpl_wr_ack *hdr = cplhdr(skb); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx,%u, cr %u.\n", csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits)); cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1); __kfree_skb(skb); return 0; } /* * for each connection, pre-allocate skbs needed for close/abort requests. So * that we can service the request right away. */ static int alloc_cpls(struct cxgbi_sock *csk) { csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0, GFP_KERNEL); if (!csk->cpl_close) return -ENOMEM; csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0, GFP_KERNEL); if (!csk->cpl_abort_req) goto free_cpl_skbs; csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0, GFP_KERNEL); if (!csk->cpl_abort_rpl) goto free_cpl_skbs; return 0; free_cpl_skbs: cxgbi_sock_free_cpl_skbs(csk); return -ENOMEM; } static void l2t_put(struct cxgbi_sock *csk) { struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; if (csk->l2t) { l2t_release(t3dev, csk->l2t); csk->l2t = NULL; cxgbi_sock_put(csk); } } /* * release_offload_resources - release offload resource * Release resources held by an offload connection (TID, L2T entry, etc.) */ static void release_offload_resources(struct cxgbi_sock *csk) { struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", csk, csk->state, csk->flags, csk->tid); csk->rss_qid = 0; cxgbi_sock_free_cpl_skbs(csk); if (csk->wr_cred != csk->wr_max_cred) { cxgbi_sock_purge_wr_queue(csk); cxgbi_sock_reset_wr_list(csk); } l2t_put(csk); if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) free_atid(csk); else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); cxgbi_sock_put(csk); } csk->dst = NULL; csk->cdev = NULL; } static void update_address(struct cxgbi_hba *chba) { if (chba->ipv4addr) { if (chba->vdev && chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) { cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr); cxgb3i_set_private_ipv4addr(chba->ndev, 0); pr_info("%s set %pI4.\n", chba->vdev->name, &chba->ipv4addr); } else if (chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->ndev)) { cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr); pr_info("%s set %pI4.\n", chba->ndev->name, &chba->ipv4addr); } } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) { if (chba->vdev) cxgb3i_set_private_ipv4addr(chba->vdev, 0); cxgb3i_set_private_ipv4addr(chba->ndev, 0); } } static int init_act_open(struct cxgbi_sock *csk) { struct dst_entry *dst = csk->dst; struct cxgbi_device *cdev = csk->cdev; struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; struct net_device *ndev = cdev->ports[csk->port_id]; struct cxgbi_hba *chba = cdev->hbas[csk->port_id]; struct sk_buff *skb = NULL; int ret; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags); update_address(chba); if (chba->ipv4addr) csk->saddr.sin_addr.s_addr = chba->ipv4addr; csk->rss_qid = 0; csk->l2t = t3_l2t_get(t3dev, dst, ndev, &csk->daddr.sin_addr.s_addr); if (!csk->l2t) { pr_err("NO l2t available.\n"); return -EINVAL; } cxgbi_sock_get(csk); csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); if (csk->atid < 0) { pr_err("NO atid available.\n"); ret = -EINVAL; goto put_sock; } cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); cxgbi_sock_get(csk); skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); if (!skb) { ret = -ENOMEM; goto free_atid; } skb->sk = (struct sock *)csk; set_arp_failure_handler(skb, act_open_arp_failure); csk->snd_win = cxgb3i_snd_win; csk->rcv_win = cxgb3i_rcv_win; csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; csk->wr_una_cred = 0; csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); cxgbi_sock_reset_wr_list(csk); csk->err = 0; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n", csk, csk->state, csk->flags, &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); send_act_open_req(csk, skb, csk->l2t); return 0; free_atid: cxgb3_free_atid(t3dev, csk->atid); put_sock: cxgbi_sock_put(csk); l2t_release(t3dev, csk->l2t); csk->l2t = NULL; return ret; } cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { [CPL_ACT_ESTABLISH] = do_act_establish, [CPL_ACT_OPEN_RPL] = do_act_open_rpl, [CPL_PEER_CLOSE] = do_peer_close, [CPL_ABORT_REQ_RSS] = do_abort_req, [CPL_ABORT_RPL_RSS] = do_abort_rpl, [CPL_CLOSE_CON_RPL] = do_close_con_rpl, [CPL_TX_DMA_ACK] = do_wr_ack, [CPL_ISCSI_HDR] = do_iscsi_hdr, }; /** * cxgb3i_ofld_init - allocate and initialize resources for each adapter found * @cdev: cxgbi adapter */ static int cxgb3i_ofld_init(struct cxgbi_device *cdev) { struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; struct adap_ports port; struct ofld_page_info rx_page_info; unsigned int wr_len; int rc; if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev); return -EINVAL; } if (cxgb3i_max_connect > CXGBI_MAX_CONN) cxgb3i_max_connect = CXGBI_MAX_CONN; rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, cxgb3i_max_connect); if (rc < 0) return rc; init_wr_tab(wr_len); cdev->csk_release_offload_resources = release_offload_resources; cdev->csk_push_tx_frames = push_tx_frames; cdev->csk_send_abort_req = send_abort_req; cdev->csk_send_close_req = send_close_req; cdev->csk_send_rx_credits = send_rx_credits; cdev->csk_alloc_cpls = alloc_cpls; cdev->csk_init_act_open = init_act_open; pr_info("cdev 0x%p, offload up, added.\n", cdev); return 0; } /* * functions to program the pagepod in h/w */ static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) { struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; memset(req, 0, sizeof(*req)); req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | V_ULPTX_CMD(ULP_MEM_WRITE)); req->len = htonl(V_ULP_MEMIO_DATA_LEN(IPPOD_SIZE >> 5) | V_ULPTX_NFLITS((IPPOD_SIZE >> 3) + 1)); } static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) { return ((struct t3cdev *)cdev->lldev)->ulp_iscsi; } static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, struct cxgbi_task_tag_info *ttinfo) { unsigned int idx = ttinfo->idx; unsigned int npods = ttinfo->npods; struct scatterlist *sg = ttinfo->sgl; struct cxgbi_pagepod *ppod; struct ulp_mem_io *req; unsigned int sg_off; unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; int i; for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) { struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + IPPOD_SIZE, 0, GFP_ATOMIC); if (!skb) return -ENOMEM; ulp_mem_io_set_hdr(skb, pm_addr); req = (struct ulp_mem_io *)skb->head; ppod = (struct cxgbi_pagepod *)(req + 1); sg_off = i * PPOD_PAGES_MAX; cxgbi_ddp_set_one_ppod(ppod, ttinfo, &sg, &sg_off); skb->priority = CPL_PRIORITY_CONTROL; cxgb3_ofld_send(ppm->lldev, skb); } return 0; } static void ddp_clear_map(struct cxgbi_device *cdev, struct cxgbi_ppm *ppm, struct cxgbi_task_tag_info *ttinfo) { unsigned int idx = ttinfo->idx; unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; unsigned int npods = ttinfo->npods; int i; log_debug(1 << CXGBI_DBG_DDP, "cdev 0x%p, clear idx %u, npods %u.\n", cdev, idx, npods); for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) { struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + IPPOD_SIZE, 0, GFP_ATOMIC); if (!skb) { pr_err("cdev 0x%p, clear ddp, %u,%d/%u, skb OOM.\n", cdev, idx, i, npods); continue; } ulp_mem_io_set_hdr(skb, pm_addr); skb->priority = CPL_PRIORITY_CONTROL; cxgb3_ofld_send(ppm->lldev, skb); } } static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, int pg_idx) { struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, GFP_KERNEL); struct cpl_set_tcb_field *req; u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; log_debug(1 << CXGBI_DBG_DDP, "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx); if (!skb) return -ENOMEM; /* set up ulp submode and page size */ req = (struct cpl_set_tcb_field *)skb->head; req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); req->reply = V_NO_REPLY(1); req->cpu_idx = 0; req->word = htons(31); req->mask = cpu_to_be64(0xF0000000); req->val = cpu_to_be64(val << 28); skb->priority = CPL_PRIORITY_CONTROL; cxgb3_ofld_send(csk->cdev->lldev, skb); return 0; } /** * ddp_setup_conn_digest - setup conn. digest setting * @csk: cxgb tcp socket * @tid: connection id * @hcrc: header digest enabled * @dcrc: data digest enabled * set up the iscsi digest settings for a connection identified by tid */ static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, int hcrc, int dcrc) { struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, GFP_KERNEL); struct cpl_set_tcb_field *req; u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); log_debug(1 << CXGBI_DBG_DDP, "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc); if (!skb) return -ENOMEM; /* set up ulp submode and page size */ req = (struct cpl_set_tcb_field *)skb->head; req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); req->reply = V_NO_REPLY(1); req->cpu_idx = 0; req->word = htons(31); req->mask = cpu_to_be64(0x0F000000); req->val = cpu_to_be64(val << 24); skb->priority = CPL_PRIORITY_CONTROL; cxgb3_ofld_send(csk->cdev->lldev, skb); return 0; } /** * cxgb3i_ddp_init - initialize the cxgb3 adapter's ddp resource * @cdev: cxgb3i adapter * initialize the ddp pagepod manager for a given adapter */ static int cxgb3i_ddp_init(struct cxgbi_device *cdev) { struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; struct net_device *ndev = cdev->ports[0]; struct cxgbi_tag_format tformat; unsigned int ppmax, tagmask = 0; struct ulp_iscsi_info uinfo; int i, err; err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); if (err < 0) { pr_err("%s, failed to get iscsi param %d.\n", ndev->name, err); return err; } if (uinfo.llimit >= uinfo.ulimit) { pr_warn("T3 %s, iscsi NOT enabled %u ~ %u!\n", ndev->name, uinfo.llimit, uinfo.ulimit); return -EACCES; } ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; tagmask = cxgbi_tagmask_set(ppmax); pr_info("T3 %s: 0x%x~0x%x, 0x%x, tagmask 0x%x -> 0x%x.\n", ndev->name, uinfo.llimit, uinfo.ulimit, ppmax, uinfo.tagmask, tagmask); memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); for (i = 0; i < 4; i++) tformat.pgsz_order[i] = uinfo.pgsz_factor[i]; cxgbi_tagmask_check(tagmask, &tformat); err = cxgbi_ddp_ppm_setup(&tdev->ulp_iscsi, cdev, &tformat, (uinfo.ulimit - uinfo.llimit + 1), uinfo.llimit, uinfo.llimit, 0, 0, 0); if (err) return err; if (!(cdev->flags & CXGBI_FLAG_DDP_OFF)) { uinfo.tagmask = tagmask; uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); if (err < 0) { pr_err("T3 %s fail to set iscsi param %d.\n", ndev->name, err); cdev->flags |= CXGBI_FLAG_DDP_OFF; } err = 0; } cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; cdev->csk_ddp_set_map = ddp_set_map; cdev->csk_ddp_clear_map = ddp_clear_map; cdev->cdev2ppm = cdev2ppm; cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, uinfo.max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, uinfo.max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); return 0; } static void cxgb3i_dev_close(struct t3cdev *t3dev) { struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0); return; } cxgbi_device_unregister(cdev); } /** * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings * @t3dev: t3cdev adapter */ static void cxgb3i_dev_open(struct t3cdev *t3dev) { struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); struct adapter *adapter = tdev2adap(t3dev); int i, err; if (cdev) { pr_info("0x%p, updating.\n", cdev); return; } cdev = cxgbi_device_register(0, adapter->params.nports); if (!cdev) { pr_warn("device 0x%p register failed.\n", t3dev); return; } cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET; cdev->lldev = t3dev; cdev->pdev = adapter->pdev; cdev->ports = adapter->port; cdev->nports = adapter->params.nports; cdev->mtus = adapter->params.mtus; cdev->nmtus = NMTUS; cdev->rx_credit_thres = cxgb3i_rx_credit_thres; cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); cdev->itp = &cxgb3i_iscsi_transport; err = cxgb3i_ddp_init(cdev); if (err) { pr_info("0x%p ddp init failed %d\n", cdev, err); goto err_out; } err = cxgb3i_ofld_init(cdev); if (err) { pr_info("0x%p offload init failed\n", cdev); goto err_out; } err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, &cxgb3i_host_template, cxgb3i_stt); if (err) goto err_out; for (i = 0; i < cdev->nports; i++) cdev->hbas[i]->ipv4addr = cxgb3i_get_private_ipv4addr(cdev->ports[i]); pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", cdev, cdev ? cdev->flags : 0, t3dev, err); return; err_out: cxgbi_device_unregister(cdev); } static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) { struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); log_debug(1 << CXGBI_DBG_TOE, "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", t3dev, cdev, event, port); if (!cdev) return; switch (event) { case OFFLOAD_STATUS_DOWN: cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; break; case OFFLOAD_STATUS_UP: cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; break; } } /** * cxgb3i_init_module - module init entry point * * initialize any driver wide global data structures and register itself * with the cxgb3 module */ static int __init cxgb3i_init_module(void) { int rc; printk(KERN_INFO "%s", version); rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt); if (rc < 0) return rc; cxgb3_register_client(&t3_client); return 0; } /** * cxgb3i_exit_module - module cleanup/exit entry point * * go through the driver hba list and for each hba, release any resource held. * and unregisters iscsi transport and the cxgb3 module */ static void __exit cxgb3i_exit_module(void) { cxgb3_unregister_client(&t3_client); cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt); } module_init(cxgb3i_init_module); module_exit(cxgb3i_exit_module);