1 /* 2 * cxgb4i.c: Chelsio T4 iSCSI driver. 3 * 4 * Copyright (c) 2010 Chelsio Communications, Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation. 9 * 10 * Written by: Karen Xie (kxie@chelsio.com) 11 * Rakesh Ranjan (rranjan@chelsio.com) 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 15 16 #include <linux/version.h> 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 #include <scsi/scsi_host.h> 20 #include <net/tcp.h> 21 #include <net/dst.h> 22 #include <linux/netdevice.h> 23 24 #include "t4_msg.h" 25 #include "cxgb4.h" 26 #include "cxgb4_uld.h" 27 #include "t4fw_api.h" 28 #include "l2t.h" 29 #include "cxgb4i.h" 30 31 static unsigned int dbg_level; 32 33 #include "../libcxgbi.h" 34 35 #define DRV_MODULE_NAME "cxgb4i" 36 #define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver" 37 #define DRV_MODULE_VERSION "0.9.1" 38 #define DRV_MODULE_RELDATE "Aug. 2010" 39 40 static char version[] = 41 DRV_MODULE_DESC " " DRV_MODULE_NAME 42 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 43 44 MODULE_AUTHOR("Chelsio Communications, Inc."); 45 MODULE_DESCRIPTION(DRV_MODULE_DESC); 46 MODULE_VERSION(DRV_MODULE_VERSION); 47 MODULE_LICENSE("GPL"); 48 49 module_param(dbg_level, uint, 0644); 50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 51 52 static int cxgb4i_rcv_win = 256 * 1024; 53 module_param(cxgb4i_rcv_win, int, 0644); 54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 55 56 static int cxgb4i_snd_win = 128 * 1024; 57 module_param(cxgb4i_snd_win, int, 0644); 58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 59 60 static int cxgb4i_rx_credit_thres = 10 * 1024; 61 module_param(cxgb4i_rx_credit_thres, int, 0644); 62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 63 "RX credits return threshold in bytes (default=10KB)"); 64 65 static unsigned int cxgb4i_max_connect = (8 * 1024); 66 module_param(cxgb4i_max_connect, uint, 0644); 67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 68 69 static unsigned short cxgb4i_sport_base = 20000; 70 module_param(cxgb4i_sport_base, ushort, 0644); 71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 72 73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 74 75 static void *t4_uld_add(const struct cxgb4_lld_info *); 76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 77 static int t4_uld_state_change(void *, enum cxgb4_state state); 78 79 static const struct cxgb4_uld_info cxgb4i_uld_info = { 80 .name = DRV_MODULE_NAME, 81 .add = t4_uld_add, 82 .rx_handler = t4_uld_rx_handler, 83 .state_change = t4_uld_state_change, 84 }; 85 86 static struct scsi_host_template cxgb4i_host_template = { 87 .module = THIS_MODULE, 88 .name = DRV_MODULE_NAME, 89 .proc_name = DRV_MODULE_NAME, 90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 91 .queuecommand = iscsi_queuecommand, 92 .change_queue_depth = iscsi_change_queue_depth, 93 .sg_tablesize = SG_ALL, 94 .max_sectors = 0xFFFF, 95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 96 .eh_abort_handler = iscsi_eh_abort, 97 .eh_device_reset_handler = iscsi_eh_device_reset, 98 .eh_target_reset_handler = iscsi_eh_recover_target, 99 .target_alloc = iscsi_target_alloc, 100 .use_clustering = DISABLE_CLUSTERING, 101 .this_id = -1, 102 }; 103 104 static struct iscsi_transport cxgb4i_iscsi_transport = { 105 .owner = THIS_MODULE, 106 .name = DRV_MODULE_NAME, 107 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 108 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 109 CAP_PADDING_OFFLOAD, 110 .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH | 111 ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN | 112 ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T | 113 ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST | 114 ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN | 115 ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL | 116 ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | 117 ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT | 118 ISCSI_PERSISTENT_ADDRESS | 119 ISCSI_TARGET_NAME | ISCSI_TPGT | 120 ISCSI_USERNAME | ISCSI_PASSWORD | 121 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | 122 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | 123 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | 124 ISCSI_PING_TMO | ISCSI_RECV_TMO | 125 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, 126 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | 127 ISCSI_HOST_INITIATOR_NAME | 128 ISCSI_HOST_NETDEV_NAME, 129 .get_host_param = cxgbi_get_host_param, 130 .set_host_param = cxgbi_set_host_param, 131 /* session management */ 132 .create_session = cxgbi_create_session, 133 .destroy_session = cxgbi_destroy_session, 134 .get_session_param = iscsi_session_get_param, 135 /* connection management */ 136 .create_conn = cxgbi_create_conn, 137 .bind_conn = cxgbi_bind_conn, 138 .destroy_conn = iscsi_tcp_conn_teardown, 139 .start_conn = iscsi_conn_start, 140 .stop_conn = iscsi_conn_stop, 141 .get_conn_param = cxgbi_get_conn_param, 142 .set_param = cxgbi_set_conn_param, 143 .get_stats = cxgbi_get_conn_stats, 144 /* pdu xmit req from user space */ 145 .send_pdu = iscsi_conn_send_pdu, 146 /* task */ 147 .init_task = iscsi_tcp_task_init, 148 .xmit_task = iscsi_tcp_task_xmit, 149 .cleanup_task = cxgbi_cleanup_task, 150 /* pdu */ 151 .alloc_pdu = cxgbi_conn_alloc_pdu, 152 .init_pdu = cxgbi_conn_init_pdu, 153 .xmit_pdu = cxgbi_conn_xmit_pdu, 154 .parse_pdu_itt = cxgbi_parse_pdu_itt, 155 /* TCP connect/disconnect */ 156 .ep_connect = cxgbi_ep_connect, 157 .ep_poll = cxgbi_ep_poll, 158 .ep_disconnect = cxgbi_ep_disconnect, 159 /* Error recovery timeout call */ 160 .session_recovery_timedout = iscsi_session_recovery_timedout, 161 }; 162 163 static struct scsi_transport_template *cxgb4i_stt; 164 165 /* 166 * CPL (Chelsio Protocol Language) defines a message passing interface between 167 * the host driver and Chelsio asic. 168 * The section below implments CPLs that related to iscsi tcp connection 169 * open/close/abort and data send/receive. 170 */ 171 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 172 #define RCV_BUFSIZ_MASK 0x3FFU 173 #define MAX_IMM_TX_PKT_LEN 128 174 175 static inline void set_queue(struct sk_buff *skb, unsigned int queue, 176 const struct cxgbi_sock *csk) 177 { 178 skb->queue_mapping = queue; 179 } 180 181 static int push_tx_frames(struct cxgbi_sock *, int); 182 183 /* 184 * is_ofld_imm - check whether a packet can be sent as immediate data 185 * @skb: the packet 186 * 187 * Returns true if a packet can be sent as an offload WR with immediate 188 * data. We currently use the same limit as for Ethernet packets. 189 */ 190 static inline int is_ofld_imm(const struct sk_buff *skb) 191 { 192 return skb->len <= (MAX_IMM_TX_PKT_LEN - 193 sizeof(struct fw_ofld_tx_data_wr)); 194 } 195 196 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 197 struct l2t_entry *e) 198 { 199 struct cpl_act_open_req *req; 200 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 201 unsigned long long opt0; 202 unsigned int opt2; 203 unsigned int qid_atid = ((unsigned int)csk->atid) | 204 (((unsigned int)csk->rss_qid) << 14); 205 206 opt0 = KEEP_ALIVE(1) | 207 WND_SCALE(wscale) | 208 MSS_IDX(csk->mss_idx) | 209 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | 210 TX_CHAN(csk->tx_chan) | 211 SMAC_SEL(csk->smac_idx) | 212 ULP_MODE(ULP_MODE_ISCSI) | 213 RCV_BUFSIZ(cxgb4i_rcv_win >> 10); 214 opt2 = RX_CHANNEL(0) | 215 RSS_QUEUE_VALID | 216 (1 << 20) | (1 << 22) | 217 RSS_QUEUE(csk->rss_qid); 218 219 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 220 req = (struct cpl_act_open_req *)skb->head; 221 222 INIT_TP_WR(req, 0); 223 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 224 qid_atid)); 225 req->local_port = csk->saddr.sin_port; 226 req->peer_port = csk->daddr.sin_port; 227 req->local_ip = csk->saddr.sin_addr.s_addr; 228 req->peer_ip = csk->daddr.sin_addr.s_addr; 229 req->opt0 = cpu_to_be64(opt0); 230 req->params = 0; 231 req->opt2 = cpu_to_be32(opt2); 232 233 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 234 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 235 csk, &req->local_ip, ntohs(req->local_port), 236 &req->peer_ip, ntohs(req->peer_port), 237 csk->atid, csk->rss_qid); 238 239 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 240 } 241 242 static void send_close_req(struct cxgbi_sock *csk) 243 { 244 struct sk_buff *skb = csk->cpl_close; 245 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 246 unsigned int tid = csk->tid; 247 248 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 249 "csk 0x%p,%u,0x%lx, tid %u.\n", 250 csk, csk->state, csk->flags, csk->tid); 251 csk->cpl_close = NULL; 252 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 253 INIT_TP_WR(req, tid); 254 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 255 req->rsvd = 0; 256 257 cxgbi_sock_skb_entail(csk, skb); 258 if (csk->state >= CTP_ESTABLISHED) 259 push_tx_frames(csk, 1); 260 } 261 262 static void abort_arp_failure(void *handle, struct sk_buff *skb) 263 { 264 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 265 struct cpl_abort_req *req; 266 267 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 268 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 269 csk, csk->state, csk->flags, csk->tid); 270 req = (struct cpl_abort_req *)skb->data; 271 req->cmd = CPL_ABORT_NO_RST; 272 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 273 } 274 275 static void send_abort_req(struct cxgbi_sock *csk) 276 { 277 struct cpl_abort_req *req; 278 struct sk_buff *skb = csk->cpl_abort_req; 279 280 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 281 return; 282 cxgbi_sock_set_state(csk, CTP_ABORTING); 283 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 284 cxgbi_sock_purge_write_queue(csk); 285 286 csk->cpl_abort_req = NULL; 287 req = (struct cpl_abort_req *)skb->head; 288 set_queue(skb, CPL_PRIORITY_DATA, csk); 289 req->cmd = CPL_ABORT_SEND_RST; 290 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 291 INIT_TP_WR(req, csk->tid); 292 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 293 req->rsvd0 = htonl(csk->snd_nxt); 294 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 295 296 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 297 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 298 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 299 req->rsvd1); 300 301 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 302 } 303 304 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 305 { 306 struct sk_buff *skb = csk->cpl_abort_rpl; 307 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 308 309 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 310 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 311 csk, csk->state, csk->flags, csk->tid, rst_status); 312 313 csk->cpl_abort_rpl = NULL; 314 set_queue(skb, CPL_PRIORITY_DATA, csk); 315 INIT_TP_WR(rpl, csk->tid); 316 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 317 rpl->cmd = rst_status; 318 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 319 } 320 321 /* 322 * CPL connection rx data ack: host -> 323 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 324 * credits sent. 325 */ 326 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 327 { 328 struct sk_buff *skb; 329 struct cpl_rx_data_ack *req; 330 331 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 332 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 333 csk, csk->state, csk->flags, csk->tid, credits); 334 335 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 336 if (!skb) { 337 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 338 return 0; 339 } 340 req = (struct cpl_rx_data_ack *)skb->head; 341 342 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 343 INIT_TP_WR(req, csk->tid); 344 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 345 csk->tid)); 346 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1)); 347 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 348 return credits; 349 } 350 351 /* 352 * sgl_len - calculates the size of an SGL of the given capacity 353 * @n: the number of SGL entries 354 * Calculates the number of flits needed for a scatter/gather list that 355 * can hold the given number of entries. 356 */ 357 static inline unsigned int sgl_len(unsigned int n) 358 { 359 n--; 360 return (3 * n) / 2 + (n & 1) + 2; 361 } 362 363 /* 364 * calc_tx_flits_ofld - calculate # of flits for an offload packet 365 * @skb: the packet 366 * 367 * Returns the number of flits needed for the given offload packet. 368 * These packets are already fully constructed and no additional headers 369 * will be added. 370 */ 371 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 372 { 373 unsigned int flits, cnt; 374 375 if (is_ofld_imm(skb)) 376 return DIV_ROUND_UP(skb->len, 8); 377 flits = skb_transport_offset(skb) / 8; 378 cnt = skb_shinfo(skb)->nr_frags; 379 if (skb->tail != skb->transport_header) 380 cnt++; 381 return flits + sgl_len(cnt); 382 } 383 384 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) 385 { 386 struct sk_buff *skb; 387 struct fw_flowc_wr *flowc; 388 int flowclen, i; 389 390 flowclen = 80; 391 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 392 flowc = (struct fw_flowc_wr *)skb->head; 393 flowc->op_to_nparams = 394 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); 395 flowc->flowid_len16 = 396 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | 397 FW_WR_FLOWID(csk->tid)); 398 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 399 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 400 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 401 flowc->mnemval[1].val = htonl(csk->tx_chan); 402 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 403 flowc->mnemval[2].val = htonl(csk->tx_chan); 404 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 405 flowc->mnemval[3].val = htonl(csk->rss_qid); 406 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 407 flowc->mnemval[4].val = htonl(csk->snd_nxt); 408 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 409 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 410 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 411 flowc->mnemval[6].val = htonl(cxgb4i_snd_win); 412 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 413 flowc->mnemval[7].val = htonl(csk->advmss); 414 flowc->mnemval[8].mnemonic = 0; 415 flowc->mnemval[8].val = 0; 416 for (i = 0; i < 9; i++) { 417 flowc->mnemval[i].r4[0] = 0; 418 flowc->mnemval[i].r4[1] = 0; 419 flowc->mnemval[i].r4[2] = 0; 420 } 421 set_queue(skb, CPL_PRIORITY_DATA, csk); 422 423 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 424 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 425 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 426 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, 427 csk->advmss); 428 429 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 430 } 431 432 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 433 int dlen, int len, u32 credits, int compl) 434 { 435 struct fw_ofld_tx_data_wr *req; 436 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 437 unsigned int wr_ulp_mode = 0; 438 439 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 440 441 if (is_ofld_imm(skb)) { 442 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 443 FW_WR_COMPL(1) | 444 FW_WR_IMMDLEN(dlen)); 445 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | 446 FW_WR_LEN16(credits)); 447 } else { 448 req->op_to_immdlen = 449 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 450 FW_WR_COMPL(1) | 451 FW_WR_IMMDLEN(0)); 452 req->flowid_len16 = 453 cpu_to_be32(FW_WR_FLOWID(csk->tid) | 454 FW_WR_LEN16(credits)); 455 } 456 if (submode) 457 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | 458 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); 459 req->tunnel_to_proxy = htonl(wr_ulp_mode) | 460 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1); 461 req->plen = htonl(len); 462 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 463 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 464 } 465 466 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 467 { 468 kfree_skb(skb); 469 } 470 471 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 472 { 473 int total_size = 0; 474 struct sk_buff *skb; 475 476 if (unlikely(csk->state < CTP_ESTABLISHED || 477 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 478 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 479 1 << CXGBI_DBG_PDU_TX, 480 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 481 csk, csk->state, csk->flags, csk->tid); 482 return 0; 483 } 484 485 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 486 int dlen = skb->len; 487 int len = skb->len; 488 unsigned int credits_needed; 489 490 skb_reset_transport_header(skb); 491 if (is_ofld_imm(skb)) 492 credits_needed = DIV_ROUND_UP(dlen + 493 sizeof(struct fw_ofld_tx_data_wr), 16); 494 else 495 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) 496 + sizeof(struct fw_ofld_tx_data_wr), 497 16); 498 499 if (csk->wr_cred < credits_needed) { 500 log_debug(1 << CXGBI_DBG_PDU_TX, 501 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 502 csk, skb->len, skb->data_len, 503 credits_needed, csk->wr_cred); 504 break; 505 } 506 __skb_unlink(skb, &csk->write_queue); 507 set_queue(skb, CPL_PRIORITY_DATA, csk); 508 skb->csum = credits_needed; 509 csk->wr_cred -= credits_needed; 510 csk->wr_una_cred += credits_needed; 511 cxgbi_sock_enqueue_wr(csk, skb); 512 513 log_debug(1 << CXGBI_DBG_PDU_TX, 514 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 515 csk, skb->len, skb->data_len, credits_needed, 516 csk->wr_cred, csk->wr_una_cred); 517 518 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 519 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 520 send_tx_flowc_wr(csk); 521 skb->csum += 5; 522 csk->wr_cred -= 5; 523 csk->wr_una_cred += 5; 524 } 525 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 526 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 527 req_completion); 528 csk->snd_nxt += len; 529 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 530 } 531 total_size += skb->truesize; 532 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 533 534 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 535 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 536 csk, csk->state, csk->flags, csk->tid, skb, len); 537 538 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 539 } 540 return total_size; 541 } 542 543 static inline void free_atid(struct cxgbi_sock *csk) 544 { 545 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 546 547 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 548 cxgb4_free_atid(lldi->tids, csk->atid); 549 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 550 cxgbi_sock_put(csk); 551 } 552 } 553 554 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 555 { 556 struct cxgbi_sock *csk; 557 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 558 unsigned short tcp_opt = ntohs(req->tcp_opt); 559 unsigned int tid = GET_TID(req); 560 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); 561 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 562 struct tid_info *t = lldi->tids; 563 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 564 565 csk = lookup_atid(t, atid); 566 if (unlikely(!csk)) { 567 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 568 goto rel_skb; 569 } 570 571 if (csk->atid != atid) { 572 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 573 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 574 goto rel_skb; 575 } 576 577 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 578 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n", 579 csk, csk->state, csk->flags, tid, atid, rcv_isn); 580 581 cxgbi_sock_get(csk); 582 csk->tid = tid; 583 cxgb4_insert_tid(lldi->tids, csk, tid); 584 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 585 586 free_atid(csk); 587 588 spin_lock_bh(&csk->lock); 589 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 590 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 591 csk, csk->state, csk->flags, csk->tid); 592 593 if (csk->retry_timer.function) { 594 del_timer(&csk->retry_timer); 595 csk->retry_timer.function = NULL; 596 } 597 598 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 599 /* 600 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 601 * pass through opt0. 602 */ 603 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) 604 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); 605 606 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; 607 if (GET_TCPOPT_TSTAMP(tcp_opt)) 608 csk->advmss -= 12; 609 if (csk->advmss < 128) 610 csk->advmss = 128; 611 612 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 613 "csk 0x%p, mss_idx %u, advmss %u.\n", 614 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss); 615 616 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 617 618 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 619 send_abort_req(csk); 620 else { 621 if (skb_queue_len(&csk->write_queue)) 622 push_tx_frames(csk, 0); 623 cxgbi_conn_tx_open(csk); 624 } 625 spin_unlock_bh(&csk->lock); 626 627 rel_skb: 628 __kfree_skb(skb); 629 } 630 631 static int act_open_rpl_status_to_errno(int status) 632 { 633 switch (status) { 634 case CPL_ERR_CONN_RESET: 635 return -ECONNREFUSED; 636 case CPL_ERR_ARP_MISS: 637 return -EHOSTUNREACH; 638 case CPL_ERR_CONN_TIMEDOUT: 639 return -ETIMEDOUT; 640 case CPL_ERR_TCAM_FULL: 641 return -ENOMEM; 642 case CPL_ERR_CONN_EXIST: 643 return -EADDRINUSE; 644 default: 645 return -EIO; 646 } 647 } 648 649 static void csk_act_open_retry_timer(unsigned long data) 650 { 651 struct sk_buff *skb; 652 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 653 654 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 655 "csk 0x%p,%u,0x%lx,%u.\n", 656 csk, csk->state, csk->flags, csk->tid); 657 658 cxgbi_sock_get(csk); 659 spin_lock_bh(&csk->lock); 660 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); 661 if (!skb) 662 cxgbi_sock_fail_act_open(csk, -ENOMEM); 663 else { 664 skb->sk = (struct sock *)csk; 665 t4_set_arp_err_handler(skb, csk, 666 cxgbi_sock_act_open_req_arp_failure); 667 send_act_open_req(csk, skb, csk->l2t); 668 } 669 spin_unlock_bh(&csk->lock); 670 cxgbi_sock_put(csk); 671 } 672 673 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 674 { 675 struct cxgbi_sock *csk; 676 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 677 unsigned int tid = GET_TID(rpl); 678 unsigned int atid = 679 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); 680 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status)); 681 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 682 struct tid_info *t = lldi->tids; 683 684 csk = lookup_atid(t, atid); 685 if (unlikely(!csk)) { 686 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 687 goto rel_skb; 688 } 689 690 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n", 691 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), 692 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port), 693 atid, tid, status, csk, csk->state, csk->flags); 694 695 if (status == CPL_ERR_RTX_NEG_ADVICE) 696 goto rel_skb; 697 698 if (status && status != CPL_ERR_TCAM_FULL && 699 status != CPL_ERR_CONN_EXIST && 700 status != CPL_ERR_ARP_MISS) 701 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 702 703 cxgbi_sock_get(csk); 704 spin_lock_bh(&csk->lock); 705 706 if (status == CPL_ERR_CONN_EXIST && 707 csk->retry_timer.function != csk_act_open_retry_timer) { 708 csk->retry_timer.function = csk_act_open_retry_timer; 709 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 710 } else 711 cxgbi_sock_fail_act_open(csk, 712 act_open_rpl_status_to_errno(status)); 713 714 spin_unlock_bh(&csk->lock); 715 cxgbi_sock_put(csk); 716 rel_skb: 717 __kfree_skb(skb); 718 } 719 720 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 721 { 722 struct cxgbi_sock *csk; 723 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 724 unsigned int tid = GET_TID(req); 725 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 726 struct tid_info *t = lldi->tids; 727 728 csk = lookup_tid(t, tid); 729 if (unlikely(!csk)) { 730 pr_err("can't find connection for tid %u.\n", tid); 731 goto rel_skb; 732 } 733 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 734 "csk 0x%p,%u,0x%lx,%u.\n", 735 csk, csk->state, csk->flags, csk->tid); 736 cxgbi_sock_rcv_peer_close(csk); 737 rel_skb: 738 __kfree_skb(skb); 739 } 740 741 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 742 { 743 struct cxgbi_sock *csk; 744 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 745 unsigned int tid = GET_TID(rpl); 746 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 747 struct tid_info *t = lldi->tids; 748 749 csk = lookup_tid(t, tid); 750 if (unlikely(!csk)) { 751 pr_err("can't find connection for tid %u.\n", tid); 752 goto rel_skb; 753 } 754 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 755 "csk 0x%p,%u,0x%lx,%u.\n", 756 csk, csk->state, csk->flags, csk->tid); 757 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 758 rel_skb: 759 __kfree_skb(skb); 760 } 761 762 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 763 int *need_rst) 764 { 765 switch (abort_reason) { 766 case CPL_ERR_BAD_SYN: /* fall through */ 767 case CPL_ERR_CONN_RESET: 768 return csk->state > CTP_ESTABLISHED ? 769 -EPIPE : -ECONNRESET; 770 case CPL_ERR_XMIT_TIMEDOUT: 771 case CPL_ERR_PERSIST_TIMEDOUT: 772 case CPL_ERR_FINWAIT2_TIMEDOUT: 773 case CPL_ERR_KEEPALIVE_TIMEDOUT: 774 return -ETIMEDOUT; 775 default: 776 return -EIO; 777 } 778 } 779 780 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 781 { 782 struct cxgbi_sock *csk; 783 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 784 unsigned int tid = GET_TID(req); 785 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 786 struct tid_info *t = lldi->tids; 787 int rst_status = CPL_ABORT_NO_RST; 788 789 csk = lookup_tid(t, tid); 790 if (unlikely(!csk)) { 791 pr_err("can't find connection for tid %u.\n", tid); 792 goto rel_skb; 793 } 794 795 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 796 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n", 797 csk, csk->state, csk->flags, csk->tid, req->status); 798 799 if (req->status == CPL_ERR_RTX_NEG_ADVICE || 800 req->status == CPL_ERR_PERSIST_NEG_ADVICE) 801 goto rel_skb; 802 803 cxgbi_sock_get(csk); 804 spin_lock_bh(&csk->lock); 805 806 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { 807 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 808 cxgbi_sock_set_state(csk, CTP_ABORTING); 809 goto done; 810 } 811 812 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 813 send_abort_rpl(csk, rst_status); 814 815 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 816 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 817 cxgbi_sock_closed(csk); 818 } 819 done: 820 spin_unlock_bh(&csk->lock); 821 cxgbi_sock_put(csk); 822 rel_skb: 823 __kfree_skb(skb); 824 } 825 826 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 827 { 828 struct cxgbi_sock *csk; 829 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 830 unsigned int tid = GET_TID(rpl); 831 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 832 struct tid_info *t = lldi->tids; 833 834 csk = lookup_tid(t, tid); 835 if (!csk) 836 goto rel_skb; 837 838 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 839 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", 840 rpl->status, csk, csk ? csk->state : 0, 841 csk ? csk->flags : 0UL); 842 843 if (rpl->status == CPL_ERR_ABORT_FAILED) 844 goto rel_skb; 845 846 cxgbi_sock_rcv_abort_rpl(csk); 847 rel_skb: 848 __kfree_skb(skb); 849 } 850 851 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 852 { 853 struct cxgbi_sock *csk; 854 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 855 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 856 unsigned int tid = GET_TID(cpl); 857 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 858 struct tid_info *t = lldi->tids; 859 860 csk = lookup_tid(t, tid); 861 if (unlikely(!csk)) { 862 pr_err("can't find conn. for tid %u.\n", tid); 863 goto rel_skb; 864 } 865 866 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 867 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 868 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 869 pdu_len_ddp); 870 871 spin_lock_bh(&csk->lock); 872 873 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 874 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 875 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 876 csk, csk->state, csk->flags, csk->tid); 877 if (csk->state != CTP_ABORTING) 878 goto abort_conn; 879 else 880 goto discard; 881 } 882 883 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 884 cxgbi_skcb_flags(skb) = 0; 885 886 skb_reset_transport_header(skb); 887 __skb_pull(skb, sizeof(*cpl)); 888 __pskb_trim(skb, ntohs(cpl->len)); 889 890 if (!csk->skb_ulp_lhdr) { 891 unsigned char *bhs; 892 unsigned int hlen, dlen; 893 894 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 895 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 896 csk, csk->state, csk->flags, csk->tid, skb); 897 csk->skb_ulp_lhdr = skb; 898 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 899 900 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 901 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 902 csk->tid, cxgbi_skcb_tcp_seq(skb), 903 csk->rcv_nxt); 904 goto abort_conn; 905 } 906 907 bhs = skb->data; 908 hlen = ntohs(cpl->len); 909 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 910 911 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) { 912 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 913 "mismatch %u != %u + %u, seq 0x%x.\n", 914 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40, 915 hlen, dlen, cxgbi_skcb_tcp_seq(skb)); 916 goto abort_conn; 917 } 918 919 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 920 if (dlen) 921 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 922 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 923 924 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 925 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 926 csk, skb, *bhs, hlen, dlen, 927 ntohl(*((unsigned int *)(bhs + 16))), 928 ntohl(*((unsigned int *)(bhs + 24)))); 929 930 } else { 931 struct sk_buff *lskb = csk->skb_ulp_lhdr; 932 933 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 934 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 935 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 936 csk, csk->state, csk->flags, skb, lskb); 937 } 938 939 __skb_queue_tail(&csk->receive_queue, skb); 940 spin_unlock_bh(&csk->lock); 941 return; 942 943 abort_conn: 944 send_abort_req(csk); 945 discard: 946 spin_unlock_bh(&csk->lock); 947 rel_skb: 948 __kfree_skb(skb); 949 } 950 951 static void do_rx_data_ddp(struct cxgbi_device *cdev, 952 struct sk_buff *skb) 953 { 954 struct cxgbi_sock *csk; 955 struct sk_buff *lskb; 956 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 957 unsigned int tid = GET_TID(rpl); 958 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 959 struct tid_info *t = lldi->tids; 960 unsigned int status = ntohl(rpl->ddpvld); 961 962 csk = lookup_tid(t, tid); 963 if (unlikely(!csk)) { 964 pr_err("can't find connection for tid %u.\n", tid); 965 goto rel_skb; 966 } 967 968 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 969 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 970 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 971 972 spin_lock_bh(&csk->lock); 973 974 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 975 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 976 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 977 csk, csk->state, csk->flags, csk->tid); 978 if (csk->state != CTP_ABORTING) 979 goto abort_conn; 980 else 981 goto discard; 982 } 983 984 if (!csk->skb_ulp_lhdr) { 985 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 986 goto abort_conn; 987 } 988 989 lskb = csk->skb_ulp_lhdr; 990 csk->skb_ulp_lhdr = NULL; 991 992 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 993 994 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 995 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 996 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 997 998 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 999 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1000 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1001 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1002 } 1003 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1004 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1005 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1006 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1007 } 1008 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1009 log_debug(1 << CXGBI_DBG_PDU_RX, 1010 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1011 csk, lskb, status); 1012 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1013 } 1014 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1015 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1016 log_debug(1 << CXGBI_DBG_PDU_RX, 1017 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1018 csk, lskb, status); 1019 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1020 } 1021 log_debug(1 << CXGBI_DBG_PDU_RX, 1022 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1023 csk, lskb, cxgbi_skcb_flags(lskb)); 1024 1025 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1026 cxgbi_conn_pdu_ready(csk); 1027 spin_unlock_bh(&csk->lock); 1028 goto rel_skb; 1029 1030 abort_conn: 1031 send_abort_req(csk); 1032 discard: 1033 spin_unlock_bh(&csk->lock); 1034 rel_skb: 1035 __kfree_skb(skb); 1036 } 1037 1038 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1039 { 1040 struct cxgbi_sock *csk; 1041 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1042 unsigned int tid = GET_TID(rpl); 1043 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1044 struct tid_info *t = lldi->tids; 1045 1046 csk = lookup_tid(t, tid); 1047 if (unlikely(!csk)) 1048 pr_err("can't find connection for tid %u.\n", tid); 1049 else { 1050 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1051 "csk 0x%p,%u,0x%lx,%u.\n", 1052 csk, csk->state, csk->flags, csk->tid); 1053 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1054 rpl->seq_vld); 1055 } 1056 __kfree_skb(skb); 1057 } 1058 1059 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1060 { 1061 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1062 unsigned int tid = GET_TID(rpl); 1063 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1064 struct tid_info *t = lldi->tids; 1065 struct cxgbi_sock *csk; 1066 1067 csk = lookup_tid(t, tid); 1068 if (!csk) 1069 pr_err("can't find conn. for tid %u.\n", tid); 1070 1071 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1072 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1073 csk, csk->state, csk->flags, csk->tid, rpl->status); 1074 1075 if (rpl->status != CPL_ERR_NONE) 1076 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1077 csk, tid, rpl->status); 1078 1079 __kfree_skb(skb); 1080 } 1081 1082 static int alloc_cpls(struct cxgbi_sock *csk) 1083 { 1084 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1085 0, GFP_KERNEL); 1086 if (!csk->cpl_close) 1087 return -ENOMEM; 1088 1089 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1090 0, GFP_KERNEL); 1091 if (!csk->cpl_abort_req) 1092 goto free_cpls; 1093 1094 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1095 0, GFP_KERNEL); 1096 if (!csk->cpl_abort_rpl) 1097 goto free_cpls; 1098 return 0; 1099 1100 free_cpls: 1101 cxgbi_sock_free_cpl_skbs(csk); 1102 return -ENOMEM; 1103 } 1104 1105 static inline void l2t_put(struct cxgbi_sock *csk) 1106 { 1107 if (csk->l2t) { 1108 cxgb4_l2t_release(csk->l2t); 1109 csk->l2t = NULL; 1110 cxgbi_sock_put(csk); 1111 } 1112 } 1113 1114 static void release_offload_resources(struct cxgbi_sock *csk) 1115 { 1116 struct cxgb4_lld_info *lldi; 1117 1118 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1119 "csk 0x%p,%u,0x%lx,%u.\n", 1120 csk, csk->state, csk->flags, csk->tid); 1121 1122 cxgbi_sock_free_cpl_skbs(csk); 1123 if (csk->wr_cred != csk->wr_max_cred) { 1124 cxgbi_sock_purge_wr_queue(csk); 1125 cxgbi_sock_reset_wr_list(csk); 1126 } 1127 1128 l2t_put(csk); 1129 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1130 free_atid(csk); 1131 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1132 lldi = cxgbi_cdev_priv(csk->cdev); 1133 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1134 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1135 cxgbi_sock_put(csk); 1136 } 1137 csk->dst = NULL; 1138 csk->cdev = NULL; 1139 } 1140 1141 static int init_act_open(struct cxgbi_sock *csk) 1142 { 1143 struct cxgbi_device *cdev = csk->cdev; 1144 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1145 struct net_device *ndev = cdev->ports[csk->port_id]; 1146 struct port_info *pi = netdev_priv(ndev); 1147 struct sk_buff *skb = NULL; 1148 unsigned int step; 1149 1150 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1151 "csk 0x%p,%u,0x%lx,%u.\n", 1152 csk, csk->state, csk->flags, csk->tid); 1153 1154 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1155 if (csk->atid < 0) { 1156 pr_err("%s, NO atid available.\n", ndev->name); 1157 return -EINVAL; 1158 } 1159 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1160 cxgbi_sock_get(csk); 1161 1162 csk->l2t = cxgb4_l2t_get(lldi->l2t, csk->dst->neighbour, ndev, 0); 1163 if (!csk->l2t) { 1164 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1165 goto rel_resource; 1166 } 1167 cxgbi_sock_get(csk); 1168 1169 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); 1170 if (!skb) 1171 goto rel_resource; 1172 skb->sk = (struct sock *)csk; 1173 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1174 1175 if (!csk->mtu) 1176 csk->mtu = dst_mtu(csk->dst); 1177 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1178 csk->tx_chan = cxgb4_port_chan(ndev); 1179 /* SMT two entries per row */ 1180 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1181 step = lldi->ntxq / lldi->nchan; 1182 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1183 step = lldi->nrxq / lldi->nchan; 1184 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1185 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred; 1186 csk->wr_una_cred = 0; 1187 cxgbi_sock_reset_wr_list(csk); 1188 csk->err = 0; 1189 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1190 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n", 1191 csk, pi->port_id, ndev->name, csk->tx_chan, 1192 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, 1193 csk->smac_idx); 1194 1195 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1196 send_act_open_req(csk, skb, csk->l2t); 1197 return 0; 1198 1199 rel_resource: 1200 if (skb) 1201 __kfree_skb(skb); 1202 return -EINVAL; 1203 } 1204 1205 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1206 [CPL_ACT_ESTABLISH] = do_act_establish, 1207 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1208 [CPL_PEER_CLOSE] = do_peer_close, 1209 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1210 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1211 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1212 [CPL_FW4_ACK] = do_fw4_ack, 1213 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1214 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1215 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1216 }; 1217 1218 int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1219 { 1220 int rc; 1221 1222 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1223 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1224 1225 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1226 cxgb4i_max_connect); 1227 if (rc < 0) 1228 return rc; 1229 1230 cdev->csk_release_offload_resources = release_offload_resources; 1231 cdev->csk_push_tx_frames = push_tx_frames; 1232 cdev->csk_send_abort_req = send_abort_req; 1233 cdev->csk_send_close_req = send_close_req; 1234 cdev->csk_send_rx_credits = send_rx_credits; 1235 cdev->csk_alloc_cpls = alloc_cpls; 1236 cdev->csk_init_act_open = init_act_open; 1237 1238 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1239 return 0; 1240 } 1241 1242 /* 1243 * functions to program the pagepod in h/w 1244 */ 1245 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 1246 static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req, 1247 unsigned int wr_len, unsigned int dlen, 1248 unsigned int pm_addr) 1249 { 1250 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1251 1252 INIT_ULPTX_WR(req, wr_len, 0, 0); 1253 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23)); 1254 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); 1255 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); 1256 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1257 1258 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM)); 1259 idata->len = htonl(dlen); 1260 } 1261 1262 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, 1263 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1264 unsigned int npods, 1265 struct cxgbi_gather_list *gl, 1266 unsigned int gl_pidx) 1267 { 1268 struct cxgbi_ddp_info *ddp = cdev->ddp; 1269 struct sk_buff *skb; 1270 struct ulp_mem_io *req; 1271 struct ulptx_idata *idata; 1272 struct cxgbi_pagepod *ppod; 1273 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; 1274 unsigned int dlen = PPOD_SIZE * npods; 1275 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1276 sizeof(struct ulptx_idata) + dlen, 16); 1277 unsigned int i; 1278 1279 skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1280 if (!skb) { 1281 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1282 cdev, idx, npods); 1283 return -ENOMEM; 1284 } 1285 req = (struct ulp_mem_io *)skb->head; 1286 set_queue(skb, CPL_PRIORITY_CONTROL, NULL); 1287 1288 ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr); 1289 idata = (struct ulptx_idata *)(req + 1); 1290 ppod = (struct cxgbi_pagepod *)(idata + 1); 1291 1292 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1293 if (!hdr && !gl) 1294 cxgbi_ddp_ppod_clear(ppod); 1295 else 1296 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1297 } 1298 1299 cxgb4_ofld_send(cdev->ports[port_id], skb); 1300 return 0; 1301 } 1302 1303 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1304 unsigned int idx, unsigned int npods, 1305 struct cxgbi_gather_list *gl) 1306 { 1307 unsigned int i, cnt; 1308 int err = 0; 1309 1310 for (i = 0; i < npods; i += cnt, idx += cnt) { 1311 cnt = npods - i; 1312 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1313 cnt = ULPMEM_IDATA_MAX_NPPODS; 1314 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, 1315 idx, cnt, gl, 4 * i); 1316 if (err < 0) 1317 break; 1318 } 1319 return err; 1320 } 1321 1322 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1323 unsigned int idx, unsigned int npods) 1324 { 1325 unsigned int i, cnt; 1326 int err; 1327 1328 for (i = 0; i < npods; i += cnt, idx += cnt) { 1329 cnt = npods - i; 1330 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1331 cnt = ULPMEM_IDATA_MAX_NPPODS; 1332 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, 1333 idx, cnt, NULL, 0); 1334 if (err < 0) 1335 break; 1336 } 1337 } 1338 1339 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1340 int pg_idx, bool reply) 1341 { 1342 struct sk_buff *skb; 1343 struct cpl_set_tcb_field *req; 1344 1345 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1346 return 0; 1347 1348 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1349 if (!skb) 1350 return -ENOMEM; 1351 1352 /* set up ulp page size */ 1353 req = (struct cpl_set_tcb_field *)skb->head; 1354 INIT_TP_WR(req, csk->tid); 1355 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1356 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1357 req->word_cookie = htons(0); 1358 req->mask = cpu_to_be64(0x3 << 8); 1359 req->val = cpu_to_be64(pg_idx << 8); 1360 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1361 1362 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1363 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1364 1365 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1366 return 0; 1367 } 1368 1369 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1370 int hcrc, int dcrc, int reply) 1371 { 1372 struct sk_buff *skb; 1373 struct cpl_set_tcb_field *req; 1374 1375 if (!hcrc && !dcrc) 1376 return 0; 1377 1378 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1379 if (!skb) 1380 return -ENOMEM; 1381 1382 csk->hcrc_len = (hcrc ? 4 : 0); 1383 csk->dcrc_len = (dcrc ? 4 : 0); 1384 /* set up ulp submode */ 1385 req = (struct cpl_set_tcb_field *)skb->head; 1386 INIT_TP_WR(req, tid); 1387 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1388 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1389 req->word_cookie = htons(0); 1390 req->mask = cpu_to_be64(0x3 << 4); 1391 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1392 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1393 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1394 1395 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1396 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1397 1398 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1399 return 0; 1400 } 1401 1402 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1403 { 1404 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1405 struct cxgbi_ddp_info *ddp = cdev->ddp; 1406 unsigned int tagmask, pgsz_factor[4]; 1407 int err; 1408 1409 if (ddp) { 1410 kref_get(&ddp->refcnt); 1411 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1412 cdev, cdev->ddp); 1413 return -EALREADY; 1414 } 1415 1416 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1417 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1418 lldi->iscsi_iolen, lldi->iscsi_iolen); 1419 if (err < 0) 1420 return err; 1421 1422 ddp = cdev->ddp; 1423 1424 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1425 cxgbi_ddp_page_size_factor(pgsz_factor); 1426 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1427 1428 cdev->csk_ddp_free_gl_skb = NULL; 1429 cdev->csk_ddp_alloc_gl_skb = NULL; 1430 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1431 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1432 cdev->csk_ddp_set = ddp_set_map; 1433 cdev->csk_ddp_clear = ddp_clear_map; 1434 1435 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1436 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1437 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1438 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1439 " %u/%u.\n", 1440 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1441 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1442 ddp->max_rxsz, lldi->iscsi_iolen); 1443 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1444 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1445 ddp->max_rxsz); 1446 return 0; 1447 } 1448 1449 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1450 { 1451 struct cxgbi_device *cdev; 1452 struct port_info *pi; 1453 int i, rc; 1454 1455 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1456 if (!cdev) { 1457 pr_info("t4 device 0x%p, register failed.\n", lldi); 1458 return NULL; 1459 } 1460 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1461 cdev, lldi->adapter_type, lldi->nports, 1462 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1463 lldi->nrxq, lldi->wr_cred); 1464 for (i = 0; i < lldi->nrxq; i++) 1465 log_debug(1 << CXGBI_DBG_DEV, 1466 "t4 0x%p, rxq id #%d: %u.\n", 1467 cdev, i, lldi->rxq_ids[i]); 1468 1469 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1470 cdev->flags = CXGBI_FLAG_DEV_T4; 1471 cdev->pdev = lldi->pdev; 1472 cdev->ports = lldi->ports; 1473 cdev->nports = lldi->nports; 1474 cdev->mtus = lldi->mtus; 1475 cdev->nmtus = NMTUS; 1476 cdev->snd_win = cxgb4i_snd_win; 1477 cdev->rcv_win = cxgb4i_rcv_win; 1478 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1479 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1480 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1481 cdev->itp = &cxgb4i_iscsi_transport; 1482 1483 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8; 1484 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1485 cdev, lldi->ports[0]->name, cdev->pfvf); 1486 1487 rc = cxgb4i_ddp_init(cdev); 1488 if (rc) { 1489 pr_info("t4 0x%p ddp init failed.\n", cdev); 1490 goto err_out; 1491 } 1492 rc = cxgb4i_ofld_init(cdev); 1493 if (rc) { 1494 pr_info("t4 0x%p ofld init failed.\n", cdev); 1495 goto err_out; 1496 } 1497 1498 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1499 &cxgb4i_host_template, cxgb4i_stt); 1500 if (rc) 1501 goto err_out; 1502 1503 for (i = 0; i < cdev->nports; i++) { 1504 pi = netdev_priv(lldi->ports[i]); 1505 cdev->hbas[i]->port_id = pi->port_id; 1506 } 1507 return cdev; 1508 1509 err_out: 1510 cxgbi_device_unregister(cdev); 1511 return ERR_PTR(-ENOMEM); 1512 } 1513 1514 #define RX_PULL_LEN 128 1515 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1516 const struct pkt_gl *pgl) 1517 { 1518 const struct cpl_act_establish *rpl; 1519 struct sk_buff *skb; 1520 unsigned int opc; 1521 struct cxgbi_device *cdev = handle; 1522 1523 if (pgl == NULL) { 1524 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1525 1526 skb = alloc_wr(len, 0, GFP_ATOMIC); 1527 if (!skb) 1528 goto nomem; 1529 skb_copy_to_linear_data(skb, &rsp[1], len); 1530 } else { 1531 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1532 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1533 pgl->va, be64_to_cpu(*rsp), 1534 be64_to_cpu(*(u64 *)pgl->va), 1535 pgl->tot_len); 1536 return 0; 1537 } 1538 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1539 if (unlikely(!skb)) 1540 goto nomem; 1541 } 1542 1543 rpl = (struct cpl_act_establish *)skb->data; 1544 opc = rpl->ot.opcode; 1545 log_debug(1 << CXGBI_DBG_TOE, 1546 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1547 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1548 if (cxgb4i_cplhandlers[opc]) 1549 cxgb4i_cplhandlers[opc](cdev, skb); 1550 else { 1551 pr_err("No handler for opcode 0x%x.\n", opc); 1552 __kfree_skb(skb); 1553 } 1554 return 0; 1555 nomem: 1556 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1557 return 1; 1558 } 1559 1560 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1561 { 1562 struct cxgbi_device *cdev = handle; 1563 1564 switch (state) { 1565 case CXGB4_STATE_UP: 1566 pr_info("cdev 0x%p, UP.\n", cdev); 1567 /* re-initialize */ 1568 break; 1569 case CXGB4_STATE_START_RECOVERY: 1570 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1571 /* close all connections */ 1572 break; 1573 case CXGB4_STATE_DOWN: 1574 pr_info("cdev 0x%p, DOWN.\n", cdev); 1575 break; 1576 case CXGB4_STATE_DETACH: 1577 pr_info("cdev 0x%p, DETACH.\n", cdev); 1578 break; 1579 default: 1580 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1581 break; 1582 } 1583 return 0; 1584 } 1585 1586 static int __init cxgb4i_init_module(void) 1587 { 1588 int rc; 1589 1590 printk(KERN_INFO "%s", version); 1591 1592 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1593 if (rc < 0) 1594 return rc; 1595 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1596 return 0; 1597 } 1598 1599 static void __exit cxgb4i_exit_module(void) 1600 { 1601 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1602 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1603 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1604 } 1605 1606 module_init(cxgb4i_init_module); 1607 module_exit(cxgb4i_exit_module); 1608