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