| /* |
| * cxgb4i.c: Chelsio T4 iSCSI driver. |
| * |
| * Copyright (c) 2010 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/module.h> |
| #include <linux/moduleparam.h> |
| #include <scsi/scsi_host.h> |
| #include <net/tcp.h> |
| #include <net/dst.h> |
| #include <linux/netdevice.h> |
| |
| #include "t4_msg.h" |
| #include "cxgb4.h" |
| #include "cxgb4_uld.h" |
| #include "t4fw_api.h" |
| #include "l2t.h" |
| #include "cxgb4i.h" |
| |
| static unsigned int dbg_level; |
| |
| #include "../libcxgbi.h" |
| |
| #define DRV_MODULE_NAME "cxgb4i" |
| #define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver" |
| #define DRV_MODULE_VERSION "0.9.1" |
| #define DRV_MODULE_RELDATE "Aug. 2010" |
| |
| 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 cxgb4i_rcv_win = 256 * 1024; |
| module_param(cxgb4i_rcv_win, int, 0644); |
| MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); |
| |
| static int cxgb4i_snd_win = 128 * 1024; |
| 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 const struct cxgb4_uld_info cxgb4i_uld_info = { |
| .name = DRV_MODULE_NAME, |
| .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 = iscsi_change_queue_depth, |
| .sg_tablesize = SG_ALL, |
| .max_sectors = 0xFFFF, |
| .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, |
| .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, |
| }; |
| |
| 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, |
| }; |
| |
| 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 DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
| #define RCV_BUFSIZ_MASK 0x3FFU |
| #define MAX_IMM_TX_PKT_LEN 128 |
| |
| static inline void set_queue(struct sk_buff *skb, unsigned int queue, |
| const struct cxgbi_sock *csk) |
| { |
| skb->queue_mapping = queue; |
| } |
| |
| 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 int is_ofld_imm(const struct sk_buff *skb) |
| { |
| return skb->len <= (MAX_IMM_TX_PKT_LEN - |
| sizeof(struct fw_ofld_tx_data_wr)); |
| } |
| |
| static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, |
| struct l2t_entry *e) |
| { |
| struct cpl_act_open_req *req; |
| 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(1) | |
| WND_SCALE(wscale) | |
| MSS_IDX(csk->mss_idx) | |
| L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | |
| TX_CHAN(csk->tx_chan) | |
| SMAC_SEL(csk->smac_idx) | |
| ULP_MODE(ULP_MODE_ISCSI) | |
| RCV_BUFSIZ(cxgb4i_rcv_win >> 10); |
| opt2 = RX_CHANNEL(0) | |
| RSS_QUEUE_VALID | |
| (1 << 20) | (1 << 22) | |
| RSS_QUEUE(csk->rss_qid); |
| |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); |
| 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 = 0; |
| req->opt2 = cpu_to_be32(opt2); |
| |
| log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| "csk 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); |
| |
| cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); |
| } |
| |
| 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; |
| 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_queue(skb, CPL_PRIORITY_DATA, csk); |
| 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_queue(skb, CPL_PRIORITY_DATA, csk); |
| 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(credits) | RX_FORCE_ACK(1)); |
| 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); |
| } |
| |
| static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) |
| { |
| struct sk_buff *skb; |
| struct fw_flowc_wr *flowc; |
| int flowclen, i; |
| |
| flowclen = 80; |
| skb = alloc_wr(flowclen, 0, GFP_ATOMIC); |
| flowc = (struct fw_flowc_wr *)skb->head; |
| flowc->op_to_nparams = |
| htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); |
| flowc->flowid_len16 = |
| htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | |
| FW_WR_FLOWID(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(cxgb4i_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; |
| for (i = 0; i < 9; i++) { |
| flowc->mnemval[i].r4[0] = 0; |
| flowc->mnemval[i].r4[1] = 0; |
| flowc->mnemval[i].r4[2] = 0; |
| } |
| set_queue(skb, CPL_PRIORITY_DATA, csk); |
| |
| 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, cxgb4i_snd_win, |
| csk->advmss); |
| |
| cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
| } |
| |
| 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; |
| |
| req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); |
| |
| if (is_ofld_imm(skb)) { |
| req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
| FW_WR_COMPL(1) | |
| FW_WR_IMMDLEN(dlen)); |
| req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | |
| FW_WR_LEN16(credits)); |
| } else { |
| req->op_to_immdlen = |
| cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
| FW_WR_COMPL(1) | |
| FW_WR_IMMDLEN(0)); |
| req->flowid_len16 = |
| cpu_to_be32(FW_WR_FLOWID(csk->tid) | |
| FW_WR_LEN16(credits)); |
| } |
| if (submode) |
| wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | |
| FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); |
| req->tunnel_to_proxy = htonl(wr_ulp_mode | |
| FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1)); |
| 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; |
| |
| skb_reset_transport_header(skb); |
| if (is_ofld_imm(skb)) |
| credits_needed = DIV_ROUND_UP(dlen + |
| sizeof(struct fw_ofld_tx_data_wr), 16); |
| else |
| credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) |
| + sizeof(struct fw_ofld_tx_data_wr), |
| 16); |
| |
| 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_queue(skb, CPL_PRIORITY_DATA, csk); |
| skb->csum = credits_needed; |
| 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))) { |
| if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { |
| send_tx_flowc_wr(csk); |
| skb->csum += 5; |
| csk->wr_cred -= 5; |
| csk->wr_una_cred += 5; |
| } |
| 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); |
| } |
| 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 = GET_TID_TID(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; |
| } |
| |
| log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n", |
| csk, csk->state, csk->flags, tid, atid, rcv_isn); |
| |
| cxgbi_sock_get(csk); |
| csk->tid = tid; |
| cxgb4_insert_tid(lldi->tids, csk, tid); |
| 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 (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) |
| csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); |
| |
| csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; |
| if (GET_TCPOPT_TSTAMP(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, GET_TCPOPT_MSS(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(unsigned long data) |
| { |
| struct sk_buff *skb; |
| struct cxgbi_sock *csk = (struct cxgbi_sock *)data; |
| |
| 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; |
| t4_set_arp_err_handler(skb, csk, |
| cxgbi_sock_act_open_req_arp_failure); |
| send_act_open_req(csk, skb, csk->l2t); |
| } |
| spin_unlock_bh(&csk->lock); |
| cxgbi_sock_put(csk); |
| } |
| |
| 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 = |
| GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); |
| unsigned int status = GET_AOPEN_STATUS(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("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n", |
| &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), |
| &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port), |
| atid, tid, status, csk, csk->state, csk->flags); |
| |
| if (status == CPL_ERR_RTX_NEG_ADVICE) |
| goto rel_skb; |
| |
| 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)); |
| |
| 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; |
| } |
| 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); |
| 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; |
| } |
| 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_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; |
| } |
| |
| log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n", |
| csk, csk->state, csk->flags, csk->tid, req->status); |
| |
| if (req->status == CPL_ERR_RTX_NEG_ADVICE || |
| req->status == CPL_ERR_PERSIST_NEG_ADVICE) |
| goto rel_skb; |
| |
| 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 done; |
| } |
| |
| 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); |
| } |
| done: |
| 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; |
| |
| 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); |
| |
| 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_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; |
| |
| 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; |
| |
| if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) { |
| pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " |
| "mismatch %u != %u + %u, seq 0x%x.\n", |
| csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40, |
| 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_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; |
| unsigned int status = ntohl(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, status, 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)); |
| |
| if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { |
| pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", |
| csk, lskb, status, cxgbi_skcb_flags(lskb)); |
| cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); |
| } |
| if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { |
| pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", |
| csk, lskb, status, cxgbi_skcb_flags(lskb)); |
| cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); |
| } |
| if (status & (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, lskb, status); |
| cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); |
| } |
| if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && |
| !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { |
| log_debug(1 << CXGBI_DBG_PDU_RX, |
| "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", |
| csk, lskb, status); |
| cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); |
| } |
| 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_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; |
| |
| 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); |
| 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)) { |
| lldi = cxgbi_cdev_priv(csk->cdev); |
| cxgb4_remove_tid(lldi->tids, 0, csk->tid); |
| cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); |
| cxgbi_sock_put(csk); |
| } |
| csk->dst = NULL; |
| csk->cdev = NULL; |
| } |
| |
| 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 port_info *pi = netdev_priv(ndev); |
| struct sk_buff *skb = NULL; |
| struct neighbour *n; |
| unsigned int step; |
| |
| 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->atid = cxgb4_alloc_atid(lldi->tids, csk); |
| if (csk->atid < 0) { |
| pr_err("%s, NO atid available.\n", ndev->name); |
| return -EINVAL; |
| } |
| cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); |
| cxgbi_sock_get(csk); |
| |
| n = dst_neigh_lookup(csk->dst, &csk->daddr.sin_addr.s_addr); |
| if (!n) { |
| pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); |
| goto rel_resource; |
| } |
| csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); |
| if (!csk->l2t) { |
| pr_err("%s, cannot alloc l2t.\n", ndev->name); |
| goto rel_resource; |
| } |
| cxgbi_sock_get(csk); |
| |
| skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); |
| 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); |
| /* SMT two entries per row */ |
| csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; |
| step = lldi->ntxq / lldi->nchan; |
| csk->txq_idx = cxgb4_port_idx(ndev) * step; |
| step = lldi->nrxq / lldi->nchan; |
| csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; |
| csk->wr_max_cred = csk->wr_cred = lldi->wr_cred; |
| csk->wr_una_cred = 0; |
| cxgbi_sock_reset_wr_list(csk); |
| csk->err = 0; |
| log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n", |
| csk, pi->port_id, ndev->name, csk->tx_chan, |
| csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, |
| csk->smac_idx); |
| |
| cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); |
| send_act_open_req(csk, skb, csk->l2t); |
| neigh_release(n); |
| return 0; |
| |
| rel_resource: |
| if (n) |
| neigh_release(n); |
| if (skb) |
| __kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| 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_SET_TCB_RPL] = do_set_tcb_rpl, |
| [CPL_RX_DATA_DDP] = do_rx_data_ddp, |
| }; |
| |
| 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; |
| } |
| |
| /* |
| * functions to program the pagepod in h/w |
| */ |
| #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ |
| static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req, |
| unsigned int wr_len, unsigned int dlen, |
| unsigned int pm_addr) |
| { |
| struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); |
| |
| INIT_ULPTX_WR(req, wr_len, 0, 0); |
| req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23)); |
| req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); |
| req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); |
| req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); |
| |
| idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM)); |
| idata->len = htonl(dlen); |
| } |
| |
| static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, |
| struct cxgbi_pagepod_hdr *hdr, unsigned int idx, |
| unsigned int npods, |
| struct cxgbi_gather_list *gl, |
| unsigned int gl_pidx) |
| { |
| struct cxgbi_ddp_info *ddp = cdev->ddp; |
| struct sk_buff *skb; |
| struct ulp_mem_io *req; |
| struct ulptx_idata *idata; |
| struct cxgbi_pagepod *ppod; |
| unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; |
| unsigned int dlen = PPOD_SIZE * npods; |
| unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + |
| sizeof(struct ulptx_idata) + dlen, 16); |
| unsigned int i; |
| |
| skb = alloc_wr(wr_len, 0, GFP_ATOMIC); |
| if (!skb) { |
| pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", |
| cdev, idx, npods); |
| return -ENOMEM; |
| } |
| req = (struct ulp_mem_io *)skb->head; |
| set_queue(skb, CPL_PRIORITY_CONTROL, NULL); |
| |
| ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr); |
| idata = (struct ulptx_idata *)(req + 1); |
| ppod = (struct cxgbi_pagepod *)(idata + 1); |
| |
| for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { |
| if (!hdr && !gl) |
| cxgbi_ddp_ppod_clear(ppod); |
| else |
| cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); |
| } |
| |
| cxgb4_ofld_send(cdev->ports[port_id], skb); |
| return 0; |
| } |
| |
| static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, |
| unsigned int idx, unsigned int npods, |
| struct cxgbi_gather_list *gl) |
| { |
| unsigned int i, cnt; |
| int err = 0; |
| |
| for (i = 0; i < npods; i += cnt, idx += cnt) { |
| cnt = npods - i; |
| if (cnt > ULPMEM_IDATA_MAX_NPPODS) |
| cnt = ULPMEM_IDATA_MAX_NPPODS; |
| err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, |
| idx, cnt, gl, 4 * i); |
| if (err < 0) |
| break; |
| } |
| return err; |
| } |
| |
| static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, |
| unsigned int idx, unsigned int npods) |
| { |
| unsigned int i, cnt; |
| int err; |
| |
| for (i = 0; i < npods; i += cnt, idx += cnt) { |
| cnt = npods - i; |
| if (cnt > ULPMEM_IDATA_MAX_NPPODS) |
| cnt = ULPMEM_IDATA_MAX_NPPODS; |
| err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, |
| idx, cnt, NULL, 0); |
| if (err < 0) |
| break; |
| } |
| } |
| |
| 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(reply) | QUEUENO(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(reply) | QUEUENO(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 int cxgb4i_ddp_init(struct cxgbi_device *cdev) |
| { |
| struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
| struct cxgbi_ddp_info *ddp = cdev->ddp; |
| unsigned int tagmask, pgsz_factor[4]; |
| int err; |
| |
| if (ddp) { |
| kref_get(&ddp->refcnt); |
| pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", |
| cdev, cdev->ddp); |
| return -EALREADY; |
| } |
| |
| err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, |
| lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, |
| lldi->iscsi_iolen, lldi->iscsi_iolen); |
| if (err < 0) |
| return err; |
| |
| ddp = cdev->ddp; |
| |
| tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; |
| cxgbi_ddp_page_size_factor(pgsz_factor); |
| cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); |
| |
| cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; |
| cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; |
| cdev->csk_ddp_set = ddp_set_map; |
| cdev->csk_ddp_clear = ddp_clear_map; |
| |
| pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", |
| cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, |
| cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); |
| pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " |
| " %u/%u.\n", |
| cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, |
| ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, |
| ddp->max_rxsz, lldi->iscsi_iolen); |
| pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", |
| cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, |
| ddp->max_rxsz); |
| 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->snd_win = cxgb4i_snd_win; |
| cdev->rcv_win = cxgb4i_rcv_win; |
| cdev->rx_credit_thres = cxgb4i_rx_credit_thres; |
| cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; |
| cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); |
| cdev->itp = &cxgb4i_iscsi_transport; |
| |
| cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8; |
| 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 (cxgb4i_cplhandlers[opc]) |
| cxgb4i_cplhandlers[opc](cdev, skb); |
| else { |
| pr_err("No handler for opcode 0x%x.\n", opc); |
| __kfree_skb(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); |
| /* re-initialize */ |
| 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; |
| } |
| |
| 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); |
| return 0; |
| } |
| |
| static void __exit cxgb4i_exit_module(void) |
| { |
| 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); |