| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Karen Xie | 7534 | 56.28% | 18 | 31.03% |
| Varun Prakash | 3498 | 26.13% | 12 | 20.69% |
| Anish Bhatt | 2196 | 16.41% | 8 | 13.79% |
| Hariprasad Shenai | 63 | 0.47% | 5 | 8.62% |
| Dan Carpenter | 19 | 0.14% | 1 | 1.72% |
| David S. Miller | 16 | 0.12% | 2 | 3.45% |
| Kees Cook | 12 | 0.09% | 1 | 1.72% |
| Ganesh Goudar | 12 | 0.09% | 1 | 1.72% |
| Christoph Hellwig | 11 | 0.08% | 3 | 5.17% |
| Michael Christie | 10 | 0.07% | 3 | 5.17% |
| Thadeu Lima de Souza Cascardo | 5 | 0.04% | 1 | 1.72% |
| Isaku Yamahata | 4 | 0.03% | 1 | 1.72% |
| Quentin Lambert | 3 | 0.02% | 1 | 1.72% |
| Nicolas Dichtel | 3 | 0.02% | 1 | 1.72% |
| Total | 13386 | 58 |
/* * cxgb4i.c: Chelsio T4 iSCSI driver. * * Copyright (c) 2010-2015 Chelsio Communications, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation. * * Written by: Karen Xie (kxie@chelsio.com) * Rakesh Ranjan (rranjan@chelsio.com) */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <scsi/scsi_host.h> #include <net/tcp.h> #include <net/dst.h> #include <linux/netdevice.h> #include <net/addrconf.h> #include "t4_regs.h" #include "t4_msg.h" #include "cxgb4.h" #include "cxgb4_uld.h" #include "t4fw_api.h" #include "l2t.h" #include "cxgb4i.h" #include "clip_tbl.h" static unsigned int dbg_level; #include "../libcxgbi.h" #ifdef CONFIG_CHELSIO_T4_DCB #include <net/dcbevent.h> #include "cxgb4_dcb.h" #endif #define DRV_MODULE_NAME "cxgb4i" #define DRV_MODULE_DESC "Chelsio T4-T6 iSCSI Driver" #define DRV_MODULE_VERSION "0.9.5-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)"); #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024) static int cxgb4i_rcv_win = -1; module_param(cxgb4i_rcv_win, int, 0644); MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024) static int cxgb4i_snd_win = -1; module_param(cxgb4i_snd_win, int, 0644); MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); static int cxgb4i_rx_credit_thres = 10 * 1024; module_param(cxgb4i_rx_credit_thres, int, 0644); MODULE_PARM_DESC(cxgb4i_rx_credit_thres, "RX credits return threshold in bytes (default=10KB)"); static unsigned int cxgb4i_max_connect = (8 * 1024); module_param(cxgb4i_max_connect, uint, 0644); MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); static unsigned short cxgb4i_sport_base = 20000; module_param(cxgb4i_sport_base, ushort, 0644); MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); static void *t4_uld_add(const struct cxgb4_lld_info *); static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); static int t4_uld_state_change(void *, enum cxgb4_state state); static inline int send_tx_flowc_wr(struct cxgbi_sock *); static const struct cxgb4_uld_info cxgb4i_uld_info = { .name = DRV_MODULE_NAME, .nrxq = MAX_ULD_QSETS, .ntxq = MAX_ULD_QSETS, .rxq_size = 1024, .lro = false, .add = t4_uld_add, .rx_handler = t4_uld_rx_handler, .state_change = t4_uld_state_change, }; static struct scsi_host_template cxgb4i_host_template = { .module = THIS_MODULE, .name = DRV_MODULE_NAME, .proc_name = DRV_MODULE_NAME, .can_queue = CXGB4I_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, .use_clustering = DISABLE_CLUSTERING, .this_id = -1, .track_queue_depth = 1, }; static struct iscsi_transport cxgb4i_iscsi_transport = { .owner = THIS_MODULE, .name = DRV_MODULE_NAME, .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, .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, }; #ifdef CONFIG_CHELSIO_T4_DCB static int cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *); static struct notifier_block cxgb4_dcb_change = { .notifier_call = cxgb4_dcb_change_notify, }; #endif static struct scsi_transport_template *cxgb4i_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. */ #define RCV_BUFSIZ_MASK 0x3FFU #define MAX_IMM_TX_PKT_LEN 256 static int push_tx_frames(struct cxgbi_sock *, int); /* * is_ofld_imm - check whether a packet can be sent as immediate data * @skb: the packet * * Returns true if a packet can be sent as an offload WR with immediate * data. We currently use the same limit as for Ethernet packets. */ static inline bool is_ofld_imm(const struct sk_buff *skb) { int len = skb->len; if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) len += sizeof(struct fw_ofld_tx_data_wr); return len <= MAX_IMM_TX_PKT_LEN; } static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, struct l2t_entry *e) { struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); unsigned long long opt0; unsigned int opt2; unsigned int qid_atid = ((unsigned int)csk->atid) | (((unsigned int)csk->rss_qid) << 14); opt0 = KEEP_ALIVE_F | WND_SCALE_V(wscale) | MSS_IDX_V(csk->mss_idx) | L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | TX_CHAN_V(csk->tx_chan) | SMAC_SEL_V(csk->smac_idx) | ULP_MODE_V(ULP_MODE_ISCSI) | RCV_BUFSIZ_V(csk->rcv_win >> 10); opt2 = RX_CHANNEL_V(0) | RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid); if (is_t4(lldi->adapter_type)) { struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; INIT_TP_WR(req, 0); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_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->opt0 = cpu_to_be64(opt0); req->params = cpu_to_be32(cxgb4_select_ntuple( csk->cdev->ports[csk->port_id], csk->l2t)); opt2 |= RX_FC_VALID_F; req->opt2 = cpu_to_be32(opt2); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", csk, &req->local_ip, ntohs(req->local_port), &req->peer_ip, ntohs(req->peer_port), csk->atid, csk->rss_qid); } else if (is_t5(lldi->adapter_type)) { struct cpl_t5_act_open_req *req = (struct cpl_t5_act_open_req *)skb->head; u32 isn = (prandom_u32() & ~7UL) - 1; INIT_TP_WR(req, 0); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_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->opt0 = cpu_to_be64(opt0); req->params = cpu_to_be64(FILTER_TUPLE_V( cxgb4_select_ntuple( csk->cdev->ports[csk->port_id], csk->l2t))); req->rsvd = cpu_to_be32(isn); opt2 |= T5_ISS_VALID; opt2 |= T5_OPT_2_VALID_F; req->opt2 = cpu_to_be32(opt2); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", csk, &req->local_ip, ntohs(req->local_port), &req->peer_ip, ntohs(req->peer_port), csk->atid, csk->rss_qid); } else { struct cpl_t6_act_open_req *req = (struct cpl_t6_act_open_req *)skb->head; u32 isn = (prandom_u32() & ~7UL) - 1; INIT_TP_WR(req, 0); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_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->opt0 = cpu_to_be64(opt0); req->params = cpu_to_be64(FILTER_TUPLE_V( cxgb4_select_ntuple( csk->cdev->ports[csk->port_id], csk->l2t))); req->rsvd = cpu_to_be32(isn); opt2 |= T5_ISS_VALID; opt2 |= RX_FC_DISABLE_F; opt2 |= T5_OPT_2_VALID_F; req->opt2 = cpu_to_be32(opt2); req->rsvd2 = cpu_to_be32(0); req->opt3 = cpu_to_be32(0); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", csk, &req->local_ip, ntohs(req->local_port), &req->peer_ip, ntohs(req->peer_port), csk->atid, csk->rss_qid); } set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", (&csk->saddr), (&csk->daddr), CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state, csk->flags, csk->atid, csk->rss_qid); cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); } #if IS_ENABLED(CONFIG_IPV6) static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, struct l2t_entry *e) { struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); unsigned long long opt0; unsigned int opt2; unsigned int qid_atid = ((unsigned int)csk->atid) | (((unsigned int)csk->rss_qid) << 14); opt0 = KEEP_ALIVE_F | WND_SCALE_V(wscale) | MSS_IDX_V(csk->mss_idx) | L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | TX_CHAN_V(csk->tx_chan) | SMAC_SEL_V(csk->smac_idx) | ULP_MODE_V(ULP_MODE_ISCSI) | RCV_BUFSIZ_V(csk->rcv_win >> 10); opt2 = RX_CHANNEL_V(0) | RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid); if (is_t4(lldi->adapter_type)) { struct cpl_act_open_req6 *req = (struct cpl_act_open_req6 *)skb->head; INIT_TP_WR(req, 0); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); req->local_port = csk->saddr6.sin6_port; req->peer_port = csk->daddr6.sin6_port; req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 8); req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 8); req->opt0 = cpu_to_be64(opt0); opt2 |= RX_FC_VALID_F; req->opt2 = cpu_to_be32(opt2); req->params = cpu_to_be32(cxgb4_select_ntuple( csk->cdev->ports[csk->port_id], csk->l2t)); } else if (is_t5(lldi->adapter_type)) { struct cpl_t5_act_open_req6 *req = (struct cpl_t5_act_open_req6 *)skb->head; INIT_TP_WR(req, 0); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); req->local_port = csk->saddr6.sin6_port; req->peer_port = csk->daddr6.sin6_port; req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 8); req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 8); req->opt0 = cpu_to_be64(opt0); opt2 |= T5_OPT_2_VALID_F; req->opt2 = cpu_to_be32(opt2); req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( csk->cdev->ports[csk->port_id], csk->l2t))); } else { struct cpl_t6_act_open_req6 *req = (struct cpl_t6_act_open_req6 *)skb->head; INIT_TP_WR(req, 0); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); req->local_port = csk->saddr6.sin6_port; req->peer_port = csk->daddr6.sin6_port; req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 8); req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 8); req->opt0 = cpu_to_be64(opt0); opt2 |= RX_FC_DISABLE_F; opt2 |= T5_OPT_2_VALID_F; req->opt2 = cpu_to_be32(opt2); req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( csk->cdev->ports[csk->port_id], csk->l2t))); req->rsvd2 = cpu_to_be32(0); req->opt3 = cpu_to_be32(0); } set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state, csk->flags, csk->atid, &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), csk->rss_qid); cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); } #endif 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, tid %u.\n", csk, csk->state, csk->flags, csk->tid); csk->cpl_close = NULL; set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); INIT_TP_WR(req, tid); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); req->rsvd = 0; cxgbi_sock_skb_entail(csk, skb); if (csk->state >= CTP_ESTABLISHED) push_tx_frames(csk, 1); } static void abort_arp_failure(void *handle, struct sk_buff *skb) { struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; struct cpl_abort_req *req; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx, tid %u, abort.\n", csk, csk->state, csk->flags, csk->tid); req = (struct cpl_abort_req *)skb->data; req->cmd = CPL_ABORT_NO_RST; cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); } static void send_abort_req(struct cxgbi_sock *csk) { struct cpl_abort_req *req; struct sk_buff *skb = csk->cpl_abort_req; if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) return; if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { send_tx_flowc_wr(csk); cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); } cxgbi_sock_set_state(csk, CTP_ABORTING); cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); cxgbi_sock_purge_write_queue(csk); csk->cpl_abort_req = NULL; req = (struct cpl_abort_req *)skb->head; set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); req->cmd = CPL_ABORT_SEND_RST; t4_set_arp_err_handler(skb, csk, abort_arp_failure); INIT_TP_WR(req, csk->tid); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); req->rsvd0 = htonl(csk->snd_nxt); req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 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); cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); } 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; set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); INIT_TP_WR(rpl, csk->tid); OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); rpl->cmd = rst_status; cxgb4_ofld_send(csk->cdev->ports[csk->port_id], 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; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx,%u, credit %u.\n", csk, csk->state, csk->flags, csk->tid, credits); 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; set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); INIT_TP_WR(req, csk->tid); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) | RX_FORCE_ACK_F); cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); return credits; } /* * sgl_len - calculates the size of an SGL of the given capacity * @n: the number of SGL entries * Calculates the number of flits needed for a scatter/gather list that * can hold the given number of entries. */ static inline unsigned int sgl_len(unsigned int n) { n--; return (3 * n) / 2 + (n & 1) + 2; } /* * calc_tx_flits_ofld - calculate # of flits for an offload packet * @skb: the packet * * Returns the number of flits needed for the given offload packet. * These packets are already fully constructed and no additional headers * will be added. */ static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) { unsigned int flits, cnt; if (is_ofld_imm(skb)) return DIV_ROUND_UP(skb->len, 8); flits = skb_transport_offset(skb) / 8; cnt = skb_shinfo(skb)->nr_frags; if (skb_tail_pointer(skb) != skb_transport_header(skb)) cnt++; return flits + sgl_len(cnt); } #define FLOWC_WR_NPARAMS_MIN 9 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) { int nparams, flowclen16, flowclen; nparams = FLOWC_WR_NPARAMS_MIN; #ifdef CONFIG_CHELSIO_T4_DCB nparams++; #endif flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); flowclen16 = DIV_ROUND_UP(flowclen, 16); flowclen = flowclen16 * 16; /* * Return the number of 16-byte credits used by the FlowC request. * Pass back the nparams and actual FlowC length if requested. */ if (nparamsp) *nparamsp = nparams; if (flowclenp) *flowclenp = flowclen; return flowclen16; } static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) { struct sk_buff *skb; struct fw_flowc_wr *flowc; int nparams, flowclen16, flowclen; #ifdef CONFIG_CHELSIO_T4_DCB u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan; #endif flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); skb = alloc_wr(flowclen, 0, GFP_ATOMIC); flowc = (struct fw_flowc_wr *)skb->head; flowc->op_to_nparams = htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); flowc->flowid_len16 = htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; flowc->mnemval[0].val = htonl(csk->cdev->pfvf); flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; flowc->mnemval[1].val = htonl(csk->tx_chan); flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; flowc->mnemval[2].val = htonl(csk->tx_chan); flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; flowc->mnemval[3].val = htonl(csk->rss_qid); flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; flowc->mnemval[4].val = htonl(csk->snd_nxt); flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; flowc->mnemval[5].val = htonl(csk->rcv_nxt); flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; flowc->mnemval[6].val = htonl(csk->snd_win); flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; flowc->mnemval[7].val = htonl(csk->advmss); flowc->mnemval[8].mnemonic = 0; flowc->mnemval[8].val = 0; flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; flowc->mnemval[8].val = 16384; #ifdef CONFIG_CHELSIO_T4_DCB flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO; if (vlan == CPL_L2T_VLAN_NONE) { pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n", csk->tid); flowc->mnemval[9].val = cpu_to_be32(0); } else { flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT); } #endif set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, csk->snd_nxt, csk->rcv_nxt, csk->snd_win, csk->advmss); cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); return flowclen16; } static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int dlen, int len, u32 credits, int compl) { struct fw_ofld_tx_data_wr *req; unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; unsigned int wr_ulp_mode = 0, val; bool imm = is_ofld_imm(skb); req = __skb_push(skb, sizeof(*req)); if (imm) { req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | FW_WR_COMPL_F | FW_WR_IMMDLEN_V(dlen)); req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | FW_WR_LEN16_V(credits)); } else { req->op_to_immdlen = cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | FW_WR_COMPL_F | FW_WR_IMMDLEN_V(0)); req->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | FW_WR_LEN16_V(credits)); } if (submode) wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); val = skb_peek(&csk->write_queue) ? 0 : 1; req->tunnel_to_proxy = htonl(wr_ulp_mode | FW_OFLD_TX_DATA_WR_SHOVE_V(val)); req->plen = htonl(len); if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); } static void arp_failure_skb_discard(void *handle, 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_SOCK | 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 dlen = skb->len; int len = skb->len; unsigned int credits_needed; int flowclen16 = 0; skb_reset_transport_header(skb); if (is_ofld_imm(skb)) credits_needed = DIV_ROUND_UP(dlen, 16); else credits_needed = DIV_ROUND_UP( 8 * calc_tx_flits_ofld(skb), 16); if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) credits_needed += DIV_ROUND_UP( sizeof(struct fw_ofld_tx_data_wr), 16); /* * Assumes the initial credits is large enough to support * fw_flowc_wr plus largest possible first payload */ if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { flowclen16 = send_tx_flowc_wr(csk); csk->wr_cred -= flowclen16; csk->wr_una_cred += flowclen16; cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); } if (csk->wr_cred < credits_needed) { log_debug(1 << CXGBI_DBG_PDU_TX, "csk 0x%p, skb %u/%u, wr %d < %u.\n", csk, skb->len, skb->data_len, credits_needed, csk->wr_cred); break; } __skb_unlink(skb, &csk->write_queue); set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); skb->csum = credits_needed + flowclen16; csk->wr_cred -= credits_needed; csk->wr_una_cred += credits_needed; cxgbi_sock_enqueue_wr(csk, skb); log_debug(1 << CXGBI_DBG_PDU_TX, "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", csk, skb->len, skb->data_len, credits_needed, csk->wr_cred, csk->wr_una_cred); if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); make_tx_data_wr(csk, skb, dlen, len, credits_needed, req_completion); csk->snd_nxt += len; cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) && (csk->wr_una_cred >= (csk->wr_max_cred / 2))) { struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->data; req->wr.wr_hi |= htonl(FW_WR_COMPL_F); } total_size += skb->truesize; t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", csk, csk->state, csk->flags, csk->tid, skb, len); cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); } return total_size; } static inline void free_atid(struct cxgbi_sock *csk) { struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { cxgb4_free_atid(lldi->tids, csk->atid); cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); cxgbi_sock_put(csk); } } static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; unsigned short tcp_opt = ntohs(req->tcp_opt); unsigned int tid = GET_TID(req); unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; u32 rcv_isn = be32_to_cpu(req->rcv_isn); csk = lookup_atid(t, atid); if (unlikely(!csk)) { pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); goto rel_skb; } if (csk->atid != atid) { pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", atid, csk, csk->state, csk->flags, csk->tid, csk->atid); goto rel_skb; } pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", (&csk->saddr), (&csk->daddr), atid, tid, csk, csk->state, csk->flags, rcv_isn); module_put(cdev->owner); cxgbi_sock_get(csk); csk->tid = tid; cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family); cxgbi_sock_set_flag(csk, CTPF_HAS_TID); free_atid(csk); spin_lock_bh(&csk->lock); 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); if (csk->retry_timer.function) { del_timer(&csk->retry_timer); csk->retry_timer.function = NULL; } csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; /* * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't * pass through opt0. */ if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; if (TCPOPT_TSTAMP_G(tcp_opt)) csk->advmss -= 12; if (csk->advmss < 128) csk->advmss = 128; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p, mss_idx %u, advmss %u.\n", csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) send_abort_req(csk); else { if (skb_queue_len(&csk->write_queue)) push_tx_frames(csk, 0); cxgbi_conn_tx_open(csk); } spin_unlock_bh(&csk->lock); rel_skb: __kfree_skb(skb); } 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 csk_act_open_retry_timer(struct timer_list *t) { struct sk_buff *skb = NULL; struct cxgbi_sock *csk = from_timer(csk, t, retry_timer); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, struct l2t_entry *); int t4 = is_t4(lldi->adapter_type), size, size6; 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); if (t4) { size = sizeof(struct cpl_act_open_req); size6 = sizeof(struct cpl_act_open_req6); } else { size = sizeof(struct cpl_t5_act_open_req); size6 = sizeof(struct cpl_t5_act_open_req6); } if (csk->csk_family == AF_INET) { send_act_open_func = send_act_open_req; skb = alloc_wr(size, 0, GFP_ATOMIC); #if IS_ENABLED(CONFIG_IPV6) } else { send_act_open_func = send_act_open_req6; skb = alloc_wr(size6, 0, GFP_ATOMIC); #endif } if (!skb) cxgbi_sock_fail_act_open(csk, -ENOMEM); else { skb->sk = (struct sock *)csk; t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); send_act_open_func(csk, skb, csk->l2t); } spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); } static inline bool is_neg_adv(unsigned int status) { return status == CPL_ERR_RTX_NEG_ADVICE || status == CPL_ERR_KEEPALV_NEG_ADVICE || status == CPL_ERR_PERSIST_NEG_ADVICE; } static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; unsigned int tid = GET_TID(rpl); unsigned int atid = TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_atid(t, atid); if (unlikely(!csk)) { pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); goto rel_skb; } pr_info_ipaddr("tid %u/%u, status %u.\n" "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), atid, tid, status, csk, csk->state, csk->flags); if (is_neg_adv(status)) goto rel_skb; module_put(cdev->owner); if (status && status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && status != CPL_ERR_ARP_MISS) cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl), csk->csk_family); cxgbi_sock_get(csk); spin_lock_bh(&csk->lock); if (status == CPL_ERR_CONN_EXIST && csk->retry_timer.function != csk_act_open_retry_timer) { csk->retry_timer.function = csk_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(status)); spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); rel_skb: __kfree_skb(skb); } static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; unsigned int tid = GET_TID(req); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find connection for tid %u.\n", tid); goto rel_skb; } pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", (&csk->saddr), (&csk->daddr), csk, csk->state, csk->flags, csk->tid); cxgbi_sock_rcv_peer_close(csk); rel_skb: __kfree_skb(skb); } static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; unsigned int tid = GET_TID(rpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find connection for tid %u.\n", tid); goto rel_skb; } pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", (&csk->saddr), (&csk->daddr), csk, csk->state, csk->flags, csk->tid); cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); rel_skb: __kfree_skb(skb); } static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, int *need_rst) { switch (abort_reason) { case CPL_ERR_BAD_SYN: /* fall through */ 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 void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; unsigned int tid = GET_TID(req); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; int rst_status = CPL_ABORT_NO_RST; csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find connection for tid %u.\n", tid); goto rel_skb; } pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", (&csk->saddr), (&csk->daddr), csk, csk->state, csk->flags, csk->tid, req->status); if (is_neg_adv(req->status)) goto rel_skb; cxgbi_sock_get(csk); spin_lock_bh(&csk->lock); cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { send_tx_flowc_wr(csk); cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); } cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); cxgbi_sock_set_state(csk, CTP_ABORTING); 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); } spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); rel_skb: __kfree_skb(skb); } static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; unsigned int tid = GET_TID(rpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_tid(t, tid); if (!csk) goto rel_skb; if (csk) pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", (&csk->saddr), (&csk->daddr), csk, csk->state, csk->flags, csk->tid, rpl->status); if (rpl->status == CPL_ERR_ABORT_FAILED) goto rel_skb; cxgbi_sock_rcv_abort_rpl(csk); rel_skb: __kfree_skb(skb); } static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; unsigned int tid = GET_TID(cpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_tid(t, tid); if (!csk) { pr_err("can't find connection for tid %u.\n", tid); } else { /* not expecting this, reset the connection. */ pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); spin_lock_bh(&csk->lock); send_abort_req(csk); spin_unlock_bh(&csk->lock); } __kfree_skb(skb); } static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); unsigned int tid = GET_TID(cpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find conn. for tid %u.\n", tid); goto rel_skb; } log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", csk, csk->state, csk->flags, csk->tid, skb, skb->len, pdu_len_ddp); 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(cpl->seq); cxgbi_skcb_flags(skb) = 0; skb_reset_transport_header(skb); __skb_pull(skb, sizeof(*cpl)); __pskb_trim(skb, ntohs(cpl->len)); if (!csk->skb_ulp_lhdr) { unsigned char *bhs; unsigned int hlen, dlen, plen; log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", csk, csk->state, csk->flags, csk->tid, skb); csk->skb_ulp_lhdr = skb; cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", csk->tid, cxgbi_skcb_tcp_seq(skb), csk->rcv_nxt); goto abort_conn; } bhs = skb->data; hlen = ntohs(cpl->len); dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; plen = ISCSI_PDU_LEN_G(pdu_len_ddp); if (is_t4(lldi->adapter_type)) plen -= 40; if ((hlen + dlen) != plen) { pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " "mismatch %u != %u + %u, seq 0x%x.\n", csk->tid, plen, hlen, dlen, cxgbi_skcb_tcp_seq(skb)); goto abort_conn; } cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); if (dlen) cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", csk, skb, *bhs, hlen, dlen, ntohl(*((unsigned int *)(bhs + 16))), ntohl(*((unsigned int *)(bhs + 24)))); } else { struct sk_buff *lskb = csk->skb_ulp_lhdr; cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", csk, csk->state, csk->flags, skb, lskb); } __skb_queue_tail(&csk->receive_queue, skb); spin_unlock_bh(&csk->lock); return; abort_conn: send_abort_req(csk); discard: spin_unlock_bh(&csk->lock); rel_skb: __kfree_skb(skb); } static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; struct sk_buff *lskb; u32 tid = GET_TID(cpl); u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find conn. for tid %u.\n", tid); goto rel_skb; } log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", csk, csk->state, csk->flags, csk->tid, skb, skb->len, pdu_len_ddp); 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) = be32_to_cpu(cpl->seq); cxgbi_skcb_flags(skb) = 0; skb_reset_transport_header(skb); __skb_pull(skb, sizeof(*cpl)); __pskb_trim(skb, ntohs(cpl->len)); if (!csk->skb_ulp_lhdr) csk->skb_ulp_lhdr = skb; lskb = csk->skb_ulp_lhdr; cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", csk, csk->state, csk->flags, skb, lskb); __skb_queue_tail(&csk->receive_queue, skb); spin_unlock_bh(&csk->lock); return; abort_conn: send_abort_req(csk); discard: spin_unlock_bh(&csk->lock); rel_skb: __kfree_skb(skb); } static void cxgb4i_process_ddpvld(struct cxgbi_sock *csk, struct sk_buff *skb, u32 ddpvld) { if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", csk, skb, ddpvld, cxgbi_skcb_flags(skb)); cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); } if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", csk, skb, ddpvld, cxgbi_skcb_flags(skb)); cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); } if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", csk, skb, ddpvld); cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); } if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) { log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", csk, skb, ddpvld); cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); } } static void do_rx_data_ddp(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct sk_buff *lskb; struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; unsigned int tid = GET_TID(rpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; u32 ddpvld = be32_to_cpu(rpl->ddpvld); csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find connection for tid %u.\n", tid); goto rel_skb; } log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr); 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; } if (!csk->skb_ulp_lhdr) { pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); goto abort_conn; } lskb = csk->skb_ulp_lhdr; csk->skb_ulp_lhdr = NULL; cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); cxgb4i_process_ddpvld(csk, lskb, ddpvld); log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, lskb 0x%p, f 0x%lx.\n", csk, lskb, cxgbi_skcb_flags(lskb)); cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); cxgbi_conn_pdu_ready(csk); spin_unlock_bh(&csk->lock); goto rel_skb; abort_conn: send_abort_req(csk); discard: spin_unlock_bh(&csk->lock); rel_skb: __kfree_skb(skb); } static void do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data; struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; struct sk_buff *data_skb = NULL; u32 tid = GET_TID(rpl); u32 ddpvld = be32_to_cpu(rpl->ddpvld); u32 seq = be32_to_cpu(rpl->seq); u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp); csk = lookup_tid(t, tid); if (unlikely(!csk)) { pr_err("can't find connection for tid %u.\n", tid); goto rel_skb; } log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, " "pdu_len_ddp %u, status %u.\n", csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr, ntohs(rpl->len), pdu_len_ddp, rpl->status); 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) = seq; cxgbi_skcb_flags(skb) = 0; cxgbi_skcb_rx_pdulen(skb) = 0; skb_reset_transport_header(skb); __skb_pull(skb, sizeof(*rpl)); __pskb_trim(skb, be16_to_cpu(rpl->len)); csk->rcv_nxt = seq + pdu_len_ddp; if (csk->skb_ulp_lhdr) { data_skb = skb_peek(&csk->receive_queue); if (!data_skb || !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) { pr_err("Error! freelist data not found 0x%p, tid %u\n", data_skb, tid); goto abort_conn; } __skb_unlink(data_skb, &csk->receive_queue); cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA); __skb_queue_tail(&csk->receive_queue, skb); __skb_queue_tail(&csk->receive_queue, data_skb); } else { __skb_queue_tail(&csk->receive_queue, skb); } csk->skb_ulp_lhdr = NULL; cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL); cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc); cxgb4i_process_ddpvld(csk, skb, ddpvld); log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n", csk, skb, cxgbi_skcb_flags(skb)); cxgbi_conn_pdu_ready(csk); spin_unlock_bh(&csk->lock); return; abort_conn: send_abort_req(csk); discard: spin_unlock_bh(&csk->lock); rel_skb: __kfree_skb(skb); } static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cxgbi_sock *csk; struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; unsigned int tid = GET_TID(rpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; csk = lookup_tid(t, tid); if (unlikely(!csk)) pr_err("can't find connection for tid %u.\n", tid); else { 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_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), rpl->seq_vld); } __kfree_skb(skb); } static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) { struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; unsigned int tid = GET_TID(rpl); struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct tid_info *t = lldi->tids; struct cxgbi_sock *csk; csk = lookup_tid(t, tid); if (!csk) pr_err("can't find conn. for tid %u.\n", tid); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,%lx,%u, status 0x%x.\n", csk, csk->state, csk->flags, csk->tid, rpl->status); if (rpl->status != CPL_ERR_NONE) pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", csk, tid, rpl->status); __kfree_skb(skb); } 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_cpls; csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0, GFP_KERNEL); if (!csk->cpl_abort_rpl) goto free_cpls; return 0; free_cpls: cxgbi_sock_free_cpl_skbs(csk); return -ENOMEM; } static inline void l2t_put(struct cxgbi_sock *csk) { if (csk->l2t) { cxgb4_l2t_release(csk->l2t); csk->l2t = NULL; cxgbi_sock_put(csk); } } static void release_offload_resources(struct cxgbi_sock *csk) { struct cxgb4_lld_info *lldi; #if IS_ENABLED(CONFIG_IPV6) struct net_device *ndev = csk->cdev->ports[csk->port_id]; #endif 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_free_cpl_skbs(csk); cxgbi_sock_purge_write_queue(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 IS_ENABLED(CONFIG_IPV6) if (csk->csk_family == AF_INET6) cxgb4_clip_release(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); #endif if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) free_atid(csk); else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { lldi = cxgbi_cdev_priv(csk->cdev); cxgb4_remove_tid(lldi->tids, 0, csk->tid, csk->csk_family); cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); cxgbi_sock_put(csk); } csk->dst = NULL; } #ifdef CONFIG_CHELSIO_T4_DCB static inline u8 get_iscsi_dcb_state(struct net_device *ndev) { return ndev->dcbnl_ops->getstate(ndev); } static int select_priority(int pri_mask) { if (!pri_mask) return 0; return (ffs(pri_mask) - 1); } static u8 get_iscsi_dcb_priority(struct net_device *ndev) { int rv; u8 caps; struct dcb_app iscsi_dcb_app = { .protocol = 3260 }; rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps); if (rv) return 0; if (caps & DCB_CAP_DCBX_VER_IEEE) { iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY; rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app); } else if (caps & DCB_CAP_DCBX_VER_CEE) { iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM; rv = dcb_getapp(ndev, &iscsi_dcb_app); } log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority is set to %u\n", select_priority(rv)); return select_priority(rv); } #endif static int init_act_open(struct cxgbi_sock *csk) { struct cxgbi_device *cdev = csk->cdev; struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct net_device *ndev = cdev->ports[csk->port_id]; struct sk_buff *skb = NULL; struct neighbour *n = NULL; void *daddr; unsigned int step; unsigned int rxq_idx; unsigned int size, size6; unsigned int linkspeed; unsigned int rcv_winf, snd_winf; #ifdef CONFIG_CHELSIO_T4_DCB u8 priority = 0; #endif 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 (csk->csk_family == AF_INET) daddr = &csk->daddr.sin_addr.s_addr; #if IS_ENABLED(CONFIG_IPV6) else if (csk->csk_family == AF_INET6) daddr = &csk->daddr6.sin6_addr; #endif else { pr_err("address family 0x%x not supported\n", csk->csk_family); goto rel_resource; } n = dst_neigh_lookup(csk->dst, daddr); if (!n) { pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); goto rel_resource; } if (!(n->nud_state & NUD_VALID)) neigh_event_send(n, NULL); csk->atid = cxgb4_alloc_atid(lldi->tids, csk); if (csk->atid < 0) { pr_err("%s, NO atid available.\n", ndev->name); goto rel_resource_without_clip; } cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); cxgbi_sock_get(csk); #ifdef CONFIG_CHELSIO_T4_DCB if (get_iscsi_dcb_state(ndev)) priority = get_iscsi_dcb_priority(ndev); csk->dcb_priority = priority; csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority); #else csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); #endif if (!csk->l2t) { pr_err("%s, cannot alloc l2t.\n", ndev->name); goto rel_resource_without_clip; } cxgbi_sock_get(csk); #if IS_ENABLED(CONFIG_IPV6) if (csk->csk_family == AF_INET6) cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); #endif if (is_t4(lldi->adapter_type)) { size = sizeof(struct cpl_act_open_req); size6 = sizeof(struct cpl_act_open_req6); } else if (is_t5(lldi->adapter_type)) { size = sizeof(struct cpl_t5_act_open_req); size6 = sizeof(struct cpl_t5_act_open_req6); } else { size = sizeof(struct cpl_t6_act_open_req); size6 = sizeof(struct cpl_t6_act_open_req6); } if (csk->csk_family == AF_INET) skb = alloc_wr(size, 0, GFP_NOIO); #if IS_ENABLED(CONFIG_IPV6) else skb = alloc_wr(size6, 0, GFP_NOIO); #endif if (!skb) goto rel_resource; skb->sk = (struct sock *)csk; t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); if (!csk->mtu) csk->mtu = dst_mtu(csk->dst); cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); csk->tx_chan = cxgb4_port_chan(ndev); csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type, cxgb4_port_viid(ndev)); step = lldi->ntxq / lldi->nchan; csk->txq_idx = cxgb4_port_idx(ndev) * step; step = lldi->nrxq / lldi->nchan; rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step); cdev->rxq_idx_cntr++; csk->rss_qid = lldi->rxq_ids[rxq_idx]; linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; csk->snd_win = cxgb4i_snd_win; csk->rcv_win = cxgb4i_rcv_win; if (cxgb4i_rcv_win <= 0) { csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; rcv_winf = linkspeed / SPEED_10000; if (rcv_winf) csk->rcv_win *= rcv_winf; } if (cxgb4i_snd_win <= 0) { csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; snd_winf = linkspeed / SPEED_10000; if (snd_winf) csk->snd_win *= snd_winf; } csk->wr_cred = lldi->wr_cred - DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); csk->wr_max_cred = csk->wr_cred; csk->wr_una_cred = 0; cxgbi_sock_reset_wr_list(csk); csk->err = 0; pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", (&csk->saddr), (&csk->daddr), csk, csk->state, csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, csk->smac_idx); /* must wait for either a act_open_rpl or act_open_establish */ if (!try_module_get(cdev->owner)) { pr_err("%s, try_module_get failed.\n", ndev->name); goto rel_resource; } cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); if (csk->csk_family == AF_INET) send_act_open_req(csk, skb, csk->l2t); #if IS_ENABLED(CONFIG_IPV6) else send_act_open_req6(csk, skb, csk->l2t); #endif neigh_release(n); return 0; rel_resource: #if IS_ENABLED(CONFIG_IPV6) if (csk->csk_family == AF_INET6) cxgb4_clip_release(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); #endif rel_resource_without_clip: if (n) neigh_release(n); if (skb) __kfree_skb(skb); return -EINVAL; } static cxgb4i_cplhandler_func cxgb4i_cplhandlers[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_rss, [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, [CPL_CLOSE_CON_RPL] = do_close_con_rpl, [CPL_FW4_ACK] = do_fw4_ack, [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, [CPL_ISCSI_DATA] = do_rx_iscsi_data, [CPL_SET_TCB_RPL] = do_set_tcb_rpl, [CPL_RX_DATA_DDP] = do_rx_data_ddp, [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp, [CPL_RX_DATA] = do_rx_data, }; static int cxgb4i_ofld_init(struct cxgbi_device *cdev) { int rc; if (cxgb4i_max_connect > CXGB4I_MAX_CONN) cxgb4i_max_connect = CXGB4I_MAX_CONN; rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, cxgb4i_max_connect); if (rc < 0) return rc; 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; } static inline void ulp_mem_io_set_hdr(struct cxgbi_device *cdev, struct ulp_mem_io *req, unsigned int wr_len, unsigned int dlen, unsigned int pm_addr, int tid) { struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); INIT_ULPTX_WR(req, wr_len, 0, tid); req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | FW_WR_ATOMIC_V(0)); req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); idata->len = htonl(dlen); } static struct sk_buff * ddp_ppod_init_idata(struct cxgbi_device *cdev, struct cxgbi_ppm *ppm, unsigned int idx, unsigned int npods, unsigned int tid) { unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; unsigned int dlen = npods << PPOD_SIZE_SHIFT; unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + sizeof(struct ulptx_idata) + dlen, 16); struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); if (!skb) { pr_err("%s: %s idx %u, npods %u, OOM.\n", __func__, ppm->ndev->name, idx, npods); return NULL; } ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, pm_addr, tid); return skb; } static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, struct cxgbi_task_tag_info *ttinfo, unsigned int idx, unsigned int npods, struct scatterlist **sg_pp, unsigned int *sg_off) { struct cxgbi_device *cdev = csk->cdev; struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, csk->tid); struct ulp_mem_io *req; struct ulptx_idata *idata; struct cxgbi_pagepod *ppod; int i; if (!skb) return -ENOMEM; req = (struct ulp_mem_io *)skb->head; idata = (struct ulptx_idata *)(req + 1); ppod = (struct cxgbi_pagepod *)(idata + 1); for (i = 0; i < npods; i++, ppod++) cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); spin_lock_bh(&csk->lock); cxgbi_sock_skb_entail(csk, skb); spin_unlock_bh(&csk->lock); return 0; } static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, struct cxgbi_task_tag_info *ttinfo) { unsigned int pidx = ttinfo->idx; unsigned int npods = ttinfo->npods; unsigned int i, cnt; int err = 0; struct scatterlist *sg = ttinfo->sgl; unsigned int offset = 0; ttinfo->cid = csk->port_id; for (i = 0; i < npods; i += cnt, pidx += cnt) { cnt = npods - i; if (cnt > ULPMEM_IDATA_MAX_NPPODS) cnt = ULPMEM_IDATA_MAX_NPPODS; err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, &sg, &offset); if (err < 0) break; } return err; } static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, int pg_idx, bool reply) { struct sk_buff *skb; struct cpl_set_tcb_field *req; if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) return 0; skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); if (!skb) return -ENOMEM; /* set up ulp page size */ req = (struct cpl_set_tcb_field *)skb->head; INIT_TP_WR(req, csk->tid); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); req->word_cookie = htons(0); req->mask = cpu_to_be64(0x3 << 8); req->val = cpu_to_be64(pg_idx << 8); set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); return 0; } static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, int hcrc, int dcrc, int reply) { struct sk_buff *skb; struct cpl_set_tcb_field *req; if (!hcrc && !dcrc) return 0; skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); if (!skb) return -ENOMEM; csk->hcrc_len = (hcrc ? 4 : 0); csk->dcrc_len = (dcrc ? 4 : 0); /* set up ulp submode */ req = (struct cpl_set_tcb_field *)skb->head; INIT_TP_WR(req, tid); OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); req->word_cookie = htons(0); req->mask = cpu_to_be64(0x3 << 4); req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | (dcrc ? ULP_CRC_DATA : 0)) << 4); set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); return 0; } static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) { return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) (cxgbi_cdev_priv(cdev)))->iscsi_ppm); } static int cxgb4i_ddp_init(struct cxgbi_device *cdev) { struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); struct net_device *ndev = cdev->ports[0]; struct cxgbi_tag_format tformat; unsigned int ppmax; int i; if (!lldi->vr->iscsi.size) { pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); return -EACCES; } cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); for (i = 0; i < 4; i++) tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) & 0xF; cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); 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->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); cdev->cdev2ppm = cdev2ppm; return 0; } static void *t4_uld_add(const struct cxgb4_lld_info *lldi) { struct cxgbi_device *cdev; struct port_info *pi; int i, rc; cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); if (!cdev) { pr_info("t4 device 0x%p, register failed.\n", lldi); return NULL; } pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", cdev, lldi->adapter_type, lldi->nports, lldi->ports[0]->name, lldi->nchan, lldi->ntxq, lldi->nrxq, lldi->wr_cred); for (i = 0; i < lldi->nrxq; i++) log_debug(1 << CXGBI_DBG_DEV, "t4 0x%p, rxq id #%d: %u.\n", cdev, i, lldi->rxq_ids[i]); memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); cdev->flags = CXGBI_FLAG_DEV_T4; cdev->pdev = lldi->pdev; cdev->ports = lldi->ports; cdev->nports = lldi->nports; cdev->mtus = lldi->mtus; cdev->nmtus = NMTUS; cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <= CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0; cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); cdev->itp = &cxgb4i_iscsi_transport; cdev->owner = THIS_MODULE; cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) << FW_VIID_PFN_S; pr_info("cdev 0x%p,%s, pfvf %u.\n", cdev, lldi->ports[0]->name, cdev->pfvf); rc = cxgb4i_ddp_init(cdev); if (rc) { pr_info("t4 0x%p ddp init failed.\n", cdev); goto err_out; } rc = cxgb4i_ofld_init(cdev); if (rc) { pr_info("t4 0x%p ofld init failed.\n", cdev); goto err_out; } rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, &cxgb4i_host_template, cxgb4i_stt); if (rc) goto err_out; for (i = 0; i < cdev->nports; i++) { pi = netdev_priv(lldi->ports[i]); cdev->hbas[i]->port_id = pi->port_id; } return cdev; err_out: cxgbi_device_unregister(cdev); return ERR_PTR(-ENOMEM); } #define RX_PULL_LEN 128 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, const struct pkt_gl *pgl) { const struct cpl_act_establish *rpl; struct sk_buff *skb; unsigned int opc; struct cxgbi_device *cdev = handle; if (pgl == NULL) { unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; skb = alloc_wr(len, 0, GFP_ATOMIC); if (!skb) goto nomem; skb_copy_to_linear_data(skb, &rsp[1], len); } else { if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", pgl->va, be64_to_cpu(*rsp), be64_to_cpu(*(u64 *)pgl->va), pgl->tot_len); return 0; } skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); if (unlikely(!skb)) goto nomem; } rpl = (struct cpl_act_establish *)skb->data; opc = rpl->ot.opcode; log_debug(1 << CXGBI_DBG_TOE, "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) { pr_err("No handler for opcode 0x%x.\n", opc); __kfree_skb(skb); } else cxgb4i_cplhandlers[opc](cdev, skb); return 0; nomem: log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); return 1; } static int t4_uld_state_change(void *handle, enum cxgb4_state state) { struct cxgbi_device *cdev = handle; switch (state) { case CXGB4_STATE_UP: pr_info("cdev 0x%p, UP.\n", cdev); break; case CXGB4_STATE_START_RECOVERY: pr_info("cdev 0x%p, RECOVERY.\n", cdev); /* close all connections */ break; case CXGB4_STATE_DOWN: pr_info("cdev 0x%p, DOWN.\n", cdev); break; case CXGB4_STATE_DETACH: pr_info("cdev 0x%p, DETACH.\n", cdev); cxgbi_device_unregister(cdev); break; default: pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); break; } return 0; } #ifdef CONFIG_CHELSIO_T4_DCB static int cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val, void *data) { int i, port = 0xFF; struct net_device *ndev; struct cxgbi_device *cdev = NULL; struct dcb_app_type *iscsi_app = data; struct cxgbi_ports_map *pmap; u8 priority; if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) { if (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY) return NOTIFY_DONE; priority = iscsi_app->app.priority; } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) { if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM) return NOTIFY_DONE; if (!iscsi_app->app.priority) return NOTIFY_DONE; priority = ffs(iscsi_app->app.priority) - 1; } else { return NOTIFY_DONE; } if (iscsi_app->app.protocol != 3260) return NOTIFY_DONE; log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n", iscsi_app->ifindex, priority); ndev = dev_get_by_index(&init_net, iscsi_app->ifindex); if (!ndev) return NOTIFY_DONE; cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port); dev_put(ndev); if (!cdev) return NOTIFY_DONE; pmap = &cdev->pmap; for (i = 0; i < pmap->used; i++) { if (pmap->port_csk[i]) { struct cxgbi_sock *csk = pmap->port_csk[i]; if (csk->dcb_priority != priority) { iscsi_conn_failure(csk->user_data, ISCSI_ERR_CONN_FAILED); pr_info("Restarting iSCSI connection %p with " "priority %u->%u.\n", csk, csk->dcb_priority, priority); } } } return NOTIFY_OK; } #endif static int __init cxgb4i_init_module(void) { int rc; printk(KERN_INFO "%s", version); rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); if (rc < 0) return rc; cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); #ifdef CONFIG_CHELSIO_T4_DCB pr_info("%s dcb enabled.\n", DRV_MODULE_NAME); register_dcbevent_notifier(&cxgb4_dcb_change); #endif return 0; } static void __exit cxgb4i_exit_module(void) { #ifdef CONFIG_CHELSIO_T4_DCB unregister_dcbevent_notifier(&cxgb4_dcb_change); #endif cxgb4_unregister_uld(CXGB4_ULD_ISCSI); cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); } module_init(cxgb4i_init_module); module_exit(cxgb4i_exit_module);
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1