1 /* 2 * cxgb4i.c: Chelsio T4 iSCSI driver. 3 * 4 * Copyright (c) 2010-2015 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/kernel.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 #include <net/addrconf.h> 24 25 #include "t4_regs.h" 26 #include "t4_msg.h" 27 #include "cxgb4.h" 28 #include "cxgb4_uld.h" 29 #include "t4fw_api.h" 30 #include "l2t.h" 31 #include "cxgb4i.h" 32 #include "clip_tbl.h" 33 34 static unsigned int dbg_level; 35 36 #include "../libcxgbi.h" 37 38 #define DRV_MODULE_NAME "cxgb4i" 39 #define DRV_MODULE_DESC "Chelsio T4-T6 iSCSI Driver" 40 #define DRV_MODULE_VERSION "0.9.5-ko" 41 #define DRV_MODULE_RELDATE "Apr. 2015" 42 43 static char version[] = 44 DRV_MODULE_DESC " " DRV_MODULE_NAME 45 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 46 47 MODULE_AUTHOR("Chelsio Communications, Inc."); 48 MODULE_DESCRIPTION(DRV_MODULE_DESC); 49 MODULE_VERSION(DRV_MODULE_VERSION); 50 MODULE_LICENSE("GPL"); 51 52 module_param(dbg_level, uint, 0644); 53 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 54 55 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024) 56 static int cxgb4i_rcv_win = -1; 57 module_param(cxgb4i_rcv_win, int, 0644); 58 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 59 60 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024) 61 static int cxgb4i_snd_win = -1; 62 module_param(cxgb4i_snd_win, int, 0644); 63 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 64 65 static int cxgb4i_rx_credit_thres = 10 * 1024; 66 module_param(cxgb4i_rx_credit_thres, int, 0644); 67 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 68 "RX credits return threshold in bytes (default=10KB)"); 69 70 static unsigned int cxgb4i_max_connect = (8 * 1024); 71 module_param(cxgb4i_max_connect, uint, 0644); 72 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 73 74 static unsigned short cxgb4i_sport_base = 20000; 75 module_param(cxgb4i_sport_base, ushort, 0644); 76 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 77 78 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 79 80 static void *t4_uld_add(const struct cxgb4_lld_info *); 81 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 82 static int t4_uld_state_change(void *, enum cxgb4_state state); 83 static inline int send_tx_flowc_wr(struct cxgbi_sock *); 84 85 static const struct cxgb4_uld_info cxgb4i_uld_info = { 86 .name = DRV_MODULE_NAME, 87 .nrxq = MAX_ULD_QSETS, 88 .ntxq = MAX_ULD_QSETS, 89 .rxq_size = 1024, 90 .lro = false, 91 .add = t4_uld_add, 92 .rx_handler = t4_uld_rx_handler, 93 .state_change = t4_uld_state_change, 94 }; 95 96 static struct scsi_host_template cxgb4i_host_template = { 97 .module = THIS_MODULE, 98 .name = DRV_MODULE_NAME, 99 .proc_name = DRV_MODULE_NAME, 100 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 101 .queuecommand = iscsi_queuecommand, 102 .change_queue_depth = scsi_change_queue_depth, 103 .sg_tablesize = SG_ALL, 104 .max_sectors = 0xFFFF, 105 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 106 .eh_timed_out = iscsi_eh_cmd_timed_out, 107 .eh_abort_handler = iscsi_eh_abort, 108 .eh_device_reset_handler = iscsi_eh_device_reset, 109 .eh_target_reset_handler = iscsi_eh_recover_target, 110 .target_alloc = iscsi_target_alloc, 111 .use_clustering = DISABLE_CLUSTERING, 112 .this_id = -1, 113 .track_queue_depth = 1, 114 }; 115 116 static struct iscsi_transport cxgb4i_iscsi_transport = { 117 .owner = THIS_MODULE, 118 .name = DRV_MODULE_NAME, 119 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 120 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 121 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 122 .attr_is_visible = cxgbi_attr_is_visible, 123 .get_host_param = cxgbi_get_host_param, 124 .set_host_param = cxgbi_set_host_param, 125 /* session management */ 126 .create_session = cxgbi_create_session, 127 .destroy_session = cxgbi_destroy_session, 128 .get_session_param = iscsi_session_get_param, 129 /* connection management */ 130 .create_conn = cxgbi_create_conn, 131 .bind_conn = cxgbi_bind_conn, 132 .destroy_conn = iscsi_tcp_conn_teardown, 133 .start_conn = iscsi_conn_start, 134 .stop_conn = iscsi_conn_stop, 135 .get_conn_param = iscsi_conn_get_param, 136 .set_param = cxgbi_set_conn_param, 137 .get_stats = cxgbi_get_conn_stats, 138 /* pdu xmit req from user space */ 139 .send_pdu = iscsi_conn_send_pdu, 140 /* task */ 141 .init_task = iscsi_tcp_task_init, 142 .xmit_task = iscsi_tcp_task_xmit, 143 .cleanup_task = cxgbi_cleanup_task, 144 /* pdu */ 145 .alloc_pdu = cxgbi_conn_alloc_pdu, 146 .init_pdu = cxgbi_conn_init_pdu, 147 .xmit_pdu = cxgbi_conn_xmit_pdu, 148 .parse_pdu_itt = cxgbi_parse_pdu_itt, 149 /* TCP connect/disconnect */ 150 .get_ep_param = cxgbi_get_ep_param, 151 .ep_connect = cxgbi_ep_connect, 152 .ep_poll = cxgbi_ep_poll, 153 .ep_disconnect = cxgbi_ep_disconnect, 154 /* Error recovery timeout call */ 155 .session_recovery_timedout = iscsi_session_recovery_timedout, 156 }; 157 158 static struct scsi_transport_template *cxgb4i_stt; 159 160 /* 161 * CPL (Chelsio Protocol Language) defines a message passing interface between 162 * the host driver and Chelsio asic. 163 * The section below implments CPLs that related to iscsi tcp connection 164 * open/close/abort and data send/receive. 165 */ 166 167 #define RCV_BUFSIZ_MASK 0x3FFU 168 #define MAX_IMM_TX_PKT_LEN 256 169 170 static int push_tx_frames(struct cxgbi_sock *, int); 171 172 /* 173 * is_ofld_imm - check whether a packet can be sent as immediate data 174 * @skb: the packet 175 * 176 * Returns true if a packet can be sent as an offload WR with immediate 177 * data. We currently use the same limit as for Ethernet packets. 178 */ 179 static inline bool is_ofld_imm(const struct sk_buff *skb) 180 { 181 int len = skb->len; 182 183 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 184 len += sizeof(struct fw_ofld_tx_data_wr); 185 186 return len <= MAX_IMM_TX_PKT_LEN; 187 } 188 189 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 190 struct l2t_entry *e) 191 { 192 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 193 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 194 unsigned long long opt0; 195 unsigned int opt2; 196 unsigned int qid_atid = ((unsigned int)csk->atid) | 197 (((unsigned int)csk->rss_qid) << 14); 198 199 opt0 = KEEP_ALIVE_F | 200 WND_SCALE_V(wscale) | 201 MSS_IDX_V(csk->mss_idx) | 202 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 203 TX_CHAN_V(csk->tx_chan) | 204 SMAC_SEL_V(csk->smac_idx) | 205 ULP_MODE_V(ULP_MODE_ISCSI) | 206 RCV_BUFSIZ_V(csk->rcv_win >> 10); 207 208 opt2 = RX_CHANNEL_V(0) | 209 RSS_QUEUE_VALID_F | 210 RSS_QUEUE_V(csk->rss_qid); 211 212 if (is_t4(lldi->adapter_type)) { 213 struct cpl_act_open_req *req = 214 (struct cpl_act_open_req *)skb->head; 215 216 INIT_TP_WR(req, 0); 217 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 218 qid_atid)); 219 req->local_port = csk->saddr.sin_port; 220 req->peer_port = csk->daddr.sin_port; 221 req->local_ip = csk->saddr.sin_addr.s_addr; 222 req->peer_ip = csk->daddr.sin_addr.s_addr; 223 req->opt0 = cpu_to_be64(opt0); 224 req->params = cpu_to_be32(cxgb4_select_ntuple( 225 csk->cdev->ports[csk->port_id], 226 csk->l2t)); 227 opt2 |= RX_FC_VALID_F; 228 req->opt2 = cpu_to_be32(opt2); 229 230 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 231 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 232 csk, &req->local_ip, ntohs(req->local_port), 233 &req->peer_ip, ntohs(req->peer_port), 234 csk->atid, csk->rss_qid); 235 } else if (is_t5(lldi->adapter_type)) { 236 struct cpl_t5_act_open_req *req = 237 (struct cpl_t5_act_open_req *)skb->head; 238 u32 isn = (prandom_u32() & ~7UL) - 1; 239 240 INIT_TP_WR(req, 0); 241 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 242 qid_atid)); 243 req->local_port = csk->saddr.sin_port; 244 req->peer_port = csk->daddr.sin_port; 245 req->local_ip = csk->saddr.sin_addr.s_addr; 246 req->peer_ip = csk->daddr.sin_addr.s_addr; 247 req->opt0 = cpu_to_be64(opt0); 248 req->params = cpu_to_be64(FILTER_TUPLE_V( 249 cxgb4_select_ntuple( 250 csk->cdev->ports[csk->port_id], 251 csk->l2t))); 252 req->rsvd = cpu_to_be32(isn); 253 opt2 |= T5_ISS_VALID; 254 opt2 |= T5_OPT_2_VALID_F; 255 256 req->opt2 = cpu_to_be32(opt2); 257 258 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 259 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 260 csk, &req->local_ip, ntohs(req->local_port), 261 &req->peer_ip, ntohs(req->peer_port), 262 csk->atid, csk->rss_qid); 263 } else { 264 struct cpl_t6_act_open_req *req = 265 (struct cpl_t6_act_open_req *)skb->head; 266 u32 isn = (prandom_u32() & ~7UL) - 1; 267 268 INIT_TP_WR(req, 0); 269 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 270 qid_atid)); 271 req->local_port = csk->saddr.sin_port; 272 req->peer_port = csk->daddr.sin_port; 273 req->local_ip = csk->saddr.sin_addr.s_addr; 274 req->peer_ip = csk->daddr.sin_addr.s_addr; 275 req->opt0 = cpu_to_be64(opt0); 276 req->params = cpu_to_be64(FILTER_TUPLE_V( 277 cxgb4_select_ntuple( 278 csk->cdev->ports[csk->port_id], 279 csk->l2t))); 280 req->rsvd = cpu_to_be32(isn); 281 282 opt2 |= T5_ISS_VALID; 283 opt2 |= RX_FC_DISABLE_F; 284 opt2 |= T5_OPT_2_VALID_F; 285 286 req->opt2 = cpu_to_be32(opt2); 287 req->rsvd2 = cpu_to_be32(0); 288 req->opt3 = cpu_to_be32(0); 289 290 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 291 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 292 csk, &req->local_ip, ntohs(req->local_port), 293 &req->peer_ip, ntohs(req->peer_port), 294 csk->atid, csk->rss_qid); 295 } 296 297 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 298 299 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 300 (&csk->saddr), (&csk->daddr), 301 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, 302 csk->state, csk->flags, csk->atid, csk->rss_qid); 303 304 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 305 } 306 307 #if IS_ENABLED(CONFIG_IPV6) 308 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 309 struct l2t_entry *e) 310 { 311 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 312 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 313 unsigned long long opt0; 314 unsigned int opt2; 315 unsigned int qid_atid = ((unsigned int)csk->atid) | 316 (((unsigned int)csk->rss_qid) << 14); 317 318 opt0 = KEEP_ALIVE_F | 319 WND_SCALE_V(wscale) | 320 MSS_IDX_V(csk->mss_idx) | 321 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 322 TX_CHAN_V(csk->tx_chan) | 323 SMAC_SEL_V(csk->smac_idx) | 324 ULP_MODE_V(ULP_MODE_ISCSI) | 325 RCV_BUFSIZ_V(csk->rcv_win >> 10); 326 327 opt2 = RX_CHANNEL_V(0) | 328 RSS_QUEUE_VALID_F | 329 RSS_QUEUE_V(csk->rss_qid); 330 331 if (is_t4(lldi->adapter_type)) { 332 struct cpl_act_open_req6 *req = 333 (struct cpl_act_open_req6 *)skb->head; 334 335 INIT_TP_WR(req, 0); 336 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 337 qid_atid)); 338 req->local_port = csk->saddr6.sin6_port; 339 req->peer_port = csk->daddr6.sin6_port; 340 341 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 342 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 343 8); 344 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 345 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 346 8); 347 348 req->opt0 = cpu_to_be64(opt0); 349 350 opt2 |= RX_FC_VALID_F; 351 req->opt2 = cpu_to_be32(opt2); 352 353 req->params = cpu_to_be32(cxgb4_select_ntuple( 354 csk->cdev->ports[csk->port_id], 355 csk->l2t)); 356 } else if (is_t5(lldi->adapter_type)) { 357 struct cpl_t5_act_open_req6 *req = 358 (struct cpl_t5_act_open_req6 *)skb->head; 359 360 INIT_TP_WR(req, 0); 361 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 362 qid_atid)); 363 req->local_port = csk->saddr6.sin6_port; 364 req->peer_port = csk->daddr6.sin6_port; 365 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 366 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 367 8); 368 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 369 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 370 8); 371 req->opt0 = cpu_to_be64(opt0); 372 373 opt2 |= T5_OPT_2_VALID_F; 374 req->opt2 = cpu_to_be32(opt2); 375 376 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 377 csk->cdev->ports[csk->port_id], 378 csk->l2t))); 379 } else { 380 struct cpl_t6_act_open_req6 *req = 381 (struct cpl_t6_act_open_req6 *)skb->head; 382 383 INIT_TP_WR(req, 0); 384 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 385 qid_atid)); 386 req->local_port = csk->saddr6.sin6_port; 387 req->peer_port = csk->daddr6.sin6_port; 388 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 389 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 390 8); 391 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 392 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 393 8); 394 req->opt0 = cpu_to_be64(opt0); 395 396 opt2 |= RX_FC_DISABLE_F; 397 opt2 |= T5_OPT_2_VALID_F; 398 399 req->opt2 = cpu_to_be32(opt2); 400 401 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 402 csk->cdev->ports[csk->port_id], 403 csk->l2t))); 404 405 req->rsvd2 = cpu_to_be32(0); 406 req->opt3 = cpu_to_be32(0); 407 } 408 409 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 410 411 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 412 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state, 413 csk->flags, csk->atid, 414 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 415 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 416 csk->rss_qid); 417 418 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 419 } 420 #endif 421 422 static void send_close_req(struct cxgbi_sock *csk) 423 { 424 struct sk_buff *skb = csk->cpl_close; 425 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 426 unsigned int tid = csk->tid; 427 428 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 429 "csk 0x%p,%u,0x%lx, tid %u.\n", 430 csk, csk->state, csk->flags, csk->tid); 431 csk->cpl_close = NULL; 432 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 433 INIT_TP_WR(req, tid); 434 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 435 req->rsvd = 0; 436 437 cxgbi_sock_skb_entail(csk, skb); 438 if (csk->state >= CTP_ESTABLISHED) 439 push_tx_frames(csk, 1); 440 } 441 442 static void abort_arp_failure(void *handle, struct sk_buff *skb) 443 { 444 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 445 struct cpl_abort_req *req; 446 447 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 448 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 449 csk, csk->state, csk->flags, csk->tid); 450 req = (struct cpl_abort_req *)skb->data; 451 req->cmd = CPL_ABORT_NO_RST; 452 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 453 } 454 455 static void send_abort_req(struct cxgbi_sock *csk) 456 { 457 struct cpl_abort_req *req; 458 struct sk_buff *skb = csk->cpl_abort_req; 459 460 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 461 return; 462 463 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 464 send_tx_flowc_wr(csk); 465 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 466 } 467 468 cxgbi_sock_set_state(csk, CTP_ABORTING); 469 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 470 cxgbi_sock_purge_write_queue(csk); 471 472 csk->cpl_abort_req = NULL; 473 req = (struct cpl_abort_req *)skb->head; 474 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 475 req->cmd = CPL_ABORT_SEND_RST; 476 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 477 INIT_TP_WR(req, csk->tid); 478 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 479 req->rsvd0 = htonl(csk->snd_nxt); 480 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 481 482 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 483 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 484 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 485 req->rsvd1); 486 487 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 488 } 489 490 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 491 { 492 struct sk_buff *skb = csk->cpl_abort_rpl; 493 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 494 495 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 496 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 497 csk, csk->state, csk->flags, csk->tid, rst_status); 498 499 csk->cpl_abort_rpl = NULL; 500 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 501 INIT_TP_WR(rpl, csk->tid); 502 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 503 rpl->cmd = rst_status; 504 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 505 } 506 507 /* 508 * CPL connection rx data ack: host -> 509 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 510 * credits sent. 511 */ 512 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 513 { 514 struct sk_buff *skb; 515 struct cpl_rx_data_ack *req; 516 517 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 518 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 519 csk, csk->state, csk->flags, csk->tid, credits); 520 521 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 522 if (!skb) { 523 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 524 return 0; 525 } 526 req = (struct cpl_rx_data_ack *)skb->head; 527 528 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 529 INIT_TP_WR(req, csk->tid); 530 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 531 csk->tid)); 532 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) 533 | RX_FORCE_ACK_F); 534 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 535 return credits; 536 } 537 538 /* 539 * sgl_len - calculates the size of an SGL of the given capacity 540 * @n: the number of SGL entries 541 * Calculates the number of flits needed for a scatter/gather list that 542 * can hold the given number of entries. 543 */ 544 static inline unsigned int sgl_len(unsigned int n) 545 { 546 n--; 547 return (3 * n) / 2 + (n & 1) + 2; 548 } 549 550 /* 551 * calc_tx_flits_ofld - calculate # of flits for an offload packet 552 * @skb: the packet 553 * 554 * Returns the number of flits needed for the given offload packet. 555 * These packets are already fully constructed and no additional headers 556 * will be added. 557 */ 558 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 559 { 560 unsigned int flits, cnt; 561 562 if (is_ofld_imm(skb)) 563 return DIV_ROUND_UP(skb->len, 8); 564 flits = skb_transport_offset(skb) / 8; 565 cnt = skb_shinfo(skb)->nr_frags; 566 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 567 cnt++; 568 return flits + sgl_len(cnt); 569 } 570 571 #define FLOWC_WR_NPARAMS_MIN 9 572 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) 573 { 574 int nparams, flowclen16, flowclen; 575 576 nparams = FLOWC_WR_NPARAMS_MIN; 577 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 578 flowclen16 = DIV_ROUND_UP(flowclen, 16); 579 flowclen = flowclen16 * 16; 580 /* 581 * Return the number of 16-byte credits used by the FlowC request. 582 * Pass back the nparams and actual FlowC length if requested. 583 */ 584 if (nparamsp) 585 *nparamsp = nparams; 586 if (flowclenp) 587 *flowclenp = flowclen; 588 589 return flowclen16; 590 } 591 592 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) 593 { 594 struct sk_buff *skb; 595 struct fw_flowc_wr *flowc; 596 int nparams, flowclen16, flowclen; 597 598 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); 599 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 600 flowc = (struct fw_flowc_wr *)skb->head; 601 flowc->op_to_nparams = 602 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); 603 flowc->flowid_len16 = 604 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); 605 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 606 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 607 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 608 flowc->mnemval[1].val = htonl(csk->tx_chan); 609 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 610 flowc->mnemval[2].val = htonl(csk->tx_chan); 611 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 612 flowc->mnemval[3].val = htonl(csk->rss_qid); 613 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 614 flowc->mnemval[4].val = htonl(csk->snd_nxt); 615 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 616 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 617 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 618 flowc->mnemval[6].val = htonl(csk->snd_win); 619 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 620 flowc->mnemval[7].val = htonl(csk->advmss); 621 flowc->mnemval[8].mnemonic = 0; 622 flowc->mnemval[8].val = 0; 623 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 624 flowc->mnemval[8].val = 16384; 625 626 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 627 628 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 629 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 630 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 631 csk->snd_nxt, csk->rcv_nxt, csk->snd_win, 632 csk->advmss); 633 634 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 635 636 return flowclen16; 637 } 638 639 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 640 int dlen, int len, u32 credits, int compl) 641 { 642 struct fw_ofld_tx_data_wr *req; 643 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 644 unsigned int wr_ulp_mode = 0, val; 645 bool imm = is_ofld_imm(skb); 646 647 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 648 649 if (imm) { 650 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 651 FW_WR_COMPL_F | 652 FW_WR_IMMDLEN_V(dlen)); 653 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | 654 FW_WR_LEN16_V(credits)); 655 } else { 656 req->op_to_immdlen = 657 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 658 FW_WR_COMPL_F | 659 FW_WR_IMMDLEN_V(0)); 660 req->flowid_len16 = 661 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | 662 FW_WR_LEN16_V(credits)); 663 } 664 if (submode) 665 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | 666 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); 667 val = skb_peek(&csk->write_queue) ? 0 : 1; 668 req->tunnel_to_proxy = htonl(wr_ulp_mode | 669 FW_OFLD_TX_DATA_WR_SHOVE_V(val)); 670 req->plen = htonl(len); 671 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 672 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 673 } 674 675 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 676 { 677 kfree_skb(skb); 678 } 679 680 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 681 { 682 int total_size = 0; 683 struct sk_buff *skb; 684 685 if (unlikely(csk->state < CTP_ESTABLISHED || 686 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 687 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 688 1 << CXGBI_DBG_PDU_TX, 689 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 690 csk, csk->state, csk->flags, csk->tid); 691 return 0; 692 } 693 694 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 695 int dlen = skb->len; 696 int len = skb->len; 697 unsigned int credits_needed; 698 int flowclen16 = 0; 699 700 skb_reset_transport_header(skb); 701 if (is_ofld_imm(skb)) 702 credits_needed = DIV_ROUND_UP(dlen, 16); 703 else 704 credits_needed = DIV_ROUND_UP( 705 8 * calc_tx_flits_ofld(skb), 706 16); 707 708 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 709 credits_needed += DIV_ROUND_UP( 710 sizeof(struct fw_ofld_tx_data_wr), 711 16); 712 713 /* 714 * Assumes the initial credits is large enough to support 715 * fw_flowc_wr plus largest possible first payload 716 */ 717 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 718 flowclen16 = send_tx_flowc_wr(csk); 719 csk->wr_cred -= flowclen16; 720 csk->wr_una_cred += flowclen16; 721 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 722 } 723 724 if (csk->wr_cred < credits_needed) { 725 log_debug(1 << CXGBI_DBG_PDU_TX, 726 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 727 csk, skb->len, skb->data_len, 728 credits_needed, csk->wr_cred); 729 break; 730 } 731 __skb_unlink(skb, &csk->write_queue); 732 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 733 skb->csum = credits_needed + flowclen16; 734 csk->wr_cred -= credits_needed; 735 csk->wr_una_cred += credits_needed; 736 cxgbi_sock_enqueue_wr(csk, skb); 737 738 log_debug(1 << CXGBI_DBG_PDU_TX, 739 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 740 csk, skb->len, skb->data_len, credits_needed, 741 csk->wr_cred, csk->wr_una_cred); 742 743 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 744 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 745 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 746 req_completion); 747 csk->snd_nxt += len; 748 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 749 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) && 750 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) { 751 struct cpl_close_con_req *req = 752 (struct cpl_close_con_req *)skb->data; 753 req->wr.wr_hi |= htonl(FW_WR_COMPL_F); 754 } 755 total_size += skb->truesize; 756 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 757 758 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 759 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 760 csk, csk->state, csk->flags, csk->tid, skb, len); 761 762 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 763 } 764 return total_size; 765 } 766 767 static inline void free_atid(struct cxgbi_sock *csk) 768 { 769 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 770 771 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 772 cxgb4_free_atid(lldi->tids, csk->atid); 773 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 774 cxgbi_sock_put(csk); 775 } 776 } 777 778 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 779 { 780 struct cxgbi_sock *csk; 781 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 782 unsigned short tcp_opt = ntohs(req->tcp_opt); 783 unsigned int tid = GET_TID(req); 784 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 785 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 786 struct tid_info *t = lldi->tids; 787 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 788 789 csk = lookup_atid(t, atid); 790 if (unlikely(!csk)) { 791 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 792 goto rel_skb; 793 } 794 795 if (csk->atid != atid) { 796 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 797 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 798 goto rel_skb; 799 } 800 801 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 802 (&csk->saddr), (&csk->daddr), 803 atid, tid, csk, csk->state, csk->flags, rcv_isn); 804 805 module_put(cdev->owner); 806 807 cxgbi_sock_get(csk); 808 csk->tid = tid; 809 cxgb4_insert_tid(lldi->tids, csk, tid); 810 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 811 812 free_atid(csk); 813 814 spin_lock_bh(&csk->lock); 815 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 816 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 817 csk, csk->state, csk->flags, csk->tid); 818 819 if (csk->retry_timer.function) { 820 del_timer(&csk->retry_timer); 821 csk->retry_timer.function = NULL; 822 } 823 824 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 825 /* 826 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 827 * pass through opt0. 828 */ 829 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) 830 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); 831 832 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 833 if (TCPOPT_TSTAMP_G(tcp_opt)) 834 csk->advmss -= 12; 835 if (csk->advmss < 128) 836 csk->advmss = 128; 837 838 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 839 "csk 0x%p, mss_idx %u, advmss %u.\n", 840 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 841 842 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 843 844 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 845 send_abort_req(csk); 846 else { 847 if (skb_queue_len(&csk->write_queue)) 848 push_tx_frames(csk, 0); 849 cxgbi_conn_tx_open(csk); 850 } 851 spin_unlock_bh(&csk->lock); 852 853 rel_skb: 854 __kfree_skb(skb); 855 } 856 857 static int act_open_rpl_status_to_errno(int status) 858 { 859 switch (status) { 860 case CPL_ERR_CONN_RESET: 861 return -ECONNREFUSED; 862 case CPL_ERR_ARP_MISS: 863 return -EHOSTUNREACH; 864 case CPL_ERR_CONN_TIMEDOUT: 865 return -ETIMEDOUT; 866 case CPL_ERR_TCAM_FULL: 867 return -ENOMEM; 868 case CPL_ERR_CONN_EXIST: 869 return -EADDRINUSE; 870 default: 871 return -EIO; 872 } 873 } 874 875 static void csk_act_open_retry_timer(unsigned long data) 876 { 877 struct sk_buff *skb = NULL; 878 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 879 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 880 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 881 struct l2t_entry *); 882 int t4 = is_t4(lldi->adapter_type), size, size6; 883 884 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 885 "csk 0x%p,%u,0x%lx,%u.\n", 886 csk, csk->state, csk->flags, csk->tid); 887 888 cxgbi_sock_get(csk); 889 spin_lock_bh(&csk->lock); 890 891 if (t4) { 892 size = sizeof(struct cpl_act_open_req); 893 size6 = sizeof(struct cpl_act_open_req6); 894 } else { 895 size = sizeof(struct cpl_t5_act_open_req); 896 size6 = sizeof(struct cpl_t5_act_open_req6); 897 } 898 899 if (csk->csk_family == AF_INET) { 900 send_act_open_func = send_act_open_req; 901 skb = alloc_wr(size, 0, GFP_ATOMIC); 902 #if IS_ENABLED(CONFIG_IPV6) 903 } else { 904 send_act_open_func = send_act_open_req6; 905 skb = alloc_wr(size6, 0, GFP_ATOMIC); 906 #endif 907 } 908 909 if (!skb) 910 cxgbi_sock_fail_act_open(csk, -ENOMEM); 911 else { 912 skb->sk = (struct sock *)csk; 913 t4_set_arp_err_handler(skb, csk, 914 cxgbi_sock_act_open_req_arp_failure); 915 send_act_open_func(csk, skb, csk->l2t); 916 } 917 918 spin_unlock_bh(&csk->lock); 919 cxgbi_sock_put(csk); 920 921 } 922 923 static inline bool is_neg_adv(unsigned int status) 924 { 925 return status == CPL_ERR_RTX_NEG_ADVICE || 926 status == CPL_ERR_KEEPALV_NEG_ADVICE || 927 status == CPL_ERR_PERSIST_NEG_ADVICE; 928 } 929 930 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 931 { 932 struct cxgbi_sock *csk; 933 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 934 unsigned int tid = GET_TID(rpl); 935 unsigned int atid = 936 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 937 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 938 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 939 struct tid_info *t = lldi->tids; 940 941 csk = lookup_atid(t, atid); 942 if (unlikely(!csk)) { 943 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 944 goto rel_skb; 945 } 946 947 pr_info_ipaddr("tid %u/%u, status %u.\n" 948 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 949 atid, tid, status, csk, csk->state, csk->flags); 950 951 if (is_neg_adv(status)) 952 goto rel_skb; 953 954 module_put(cdev->owner); 955 956 if (status && status != CPL_ERR_TCAM_FULL && 957 status != CPL_ERR_CONN_EXIST && 958 status != CPL_ERR_ARP_MISS) 959 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 960 961 cxgbi_sock_get(csk); 962 spin_lock_bh(&csk->lock); 963 964 if (status == CPL_ERR_CONN_EXIST && 965 csk->retry_timer.function != csk_act_open_retry_timer) { 966 csk->retry_timer.function = csk_act_open_retry_timer; 967 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 968 } else 969 cxgbi_sock_fail_act_open(csk, 970 act_open_rpl_status_to_errno(status)); 971 972 spin_unlock_bh(&csk->lock); 973 cxgbi_sock_put(csk); 974 rel_skb: 975 __kfree_skb(skb); 976 } 977 978 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 979 { 980 struct cxgbi_sock *csk; 981 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 982 unsigned int tid = GET_TID(req); 983 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 984 struct tid_info *t = lldi->tids; 985 986 csk = lookup_tid(t, tid); 987 if (unlikely(!csk)) { 988 pr_err("can't find connection for tid %u.\n", tid); 989 goto rel_skb; 990 } 991 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 992 (&csk->saddr), (&csk->daddr), 993 csk, csk->state, csk->flags, csk->tid); 994 cxgbi_sock_rcv_peer_close(csk); 995 rel_skb: 996 __kfree_skb(skb); 997 } 998 999 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1000 { 1001 struct cxgbi_sock *csk; 1002 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 1003 unsigned int tid = GET_TID(rpl); 1004 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1005 struct tid_info *t = lldi->tids; 1006 1007 csk = lookup_tid(t, tid); 1008 if (unlikely(!csk)) { 1009 pr_err("can't find connection for tid %u.\n", tid); 1010 goto rel_skb; 1011 } 1012 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 1013 (&csk->saddr), (&csk->daddr), 1014 csk, csk->state, csk->flags, csk->tid); 1015 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 1016 rel_skb: 1017 __kfree_skb(skb); 1018 } 1019 1020 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 1021 int *need_rst) 1022 { 1023 switch (abort_reason) { 1024 case CPL_ERR_BAD_SYN: /* fall through */ 1025 case CPL_ERR_CONN_RESET: 1026 return csk->state > CTP_ESTABLISHED ? 1027 -EPIPE : -ECONNRESET; 1028 case CPL_ERR_XMIT_TIMEDOUT: 1029 case CPL_ERR_PERSIST_TIMEDOUT: 1030 case CPL_ERR_FINWAIT2_TIMEDOUT: 1031 case CPL_ERR_KEEPALIVE_TIMEDOUT: 1032 return -ETIMEDOUT; 1033 default: 1034 return -EIO; 1035 } 1036 } 1037 1038 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1039 { 1040 struct cxgbi_sock *csk; 1041 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 1042 unsigned int tid = GET_TID(req); 1043 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1044 struct tid_info *t = lldi->tids; 1045 int rst_status = CPL_ABORT_NO_RST; 1046 1047 csk = lookup_tid(t, tid); 1048 if (unlikely(!csk)) { 1049 pr_err("can't find connection for tid %u.\n", tid); 1050 goto rel_skb; 1051 } 1052 1053 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1054 (&csk->saddr), (&csk->daddr), 1055 csk, csk->state, csk->flags, csk->tid, req->status); 1056 1057 if (is_neg_adv(req->status)) 1058 goto rel_skb; 1059 1060 cxgbi_sock_get(csk); 1061 spin_lock_bh(&csk->lock); 1062 1063 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 1064 1065 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 1066 send_tx_flowc_wr(csk); 1067 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 1068 } 1069 1070 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 1071 cxgbi_sock_set_state(csk, CTP_ABORTING); 1072 1073 send_abort_rpl(csk, rst_status); 1074 1075 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1076 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1077 cxgbi_sock_closed(csk); 1078 } 1079 1080 spin_unlock_bh(&csk->lock); 1081 cxgbi_sock_put(csk); 1082 rel_skb: 1083 __kfree_skb(skb); 1084 } 1085 1086 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1087 { 1088 struct cxgbi_sock *csk; 1089 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1090 unsigned int tid = GET_TID(rpl); 1091 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1092 struct tid_info *t = lldi->tids; 1093 1094 csk = lookup_tid(t, tid); 1095 if (!csk) 1096 goto rel_skb; 1097 1098 if (csk) 1099 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1100 (&csk->saddr), (&csk->daddr), csk, 1101 csk->state, csk->flags, csk->tid, rpl->status); 1102 1103 if (rpl->status == CPL_ERR_ABORT_FAILED) 1104 goto rel_skb; 1105 1106 cxgbi_sock_rcv_abort_rpl(csk); 1107 rel_skb: 1108 __kfree_skb(skb); 1109 } 1110 1111 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1112 { 1113 struct cxgbi_sock *csk; 1114 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1115 unsigned int tid = GET_TID(cpl); 1116 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1117 struct tid_info *t = lldi->tids; 1118 1119 csk = lookup_tid(t, tid); 1120 if (!csk) { 1121 pr_err("can't find connection for tid %u.\n", tid); 1122 } else { 1123 /* not expecting this, reset the connection. */ 1124 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1125 spin_lock_bh(&csk->lock); 1126 send_abort_req(csk); 1127 spin_unlock_bh(&csk->lock); 1128 } 1129 __kfree_skb(skb); 1130 } 1131 1132 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1133 { 1134 struct cxgbi_sock *csk; 1135 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1136 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1137 unsigned int tid = GET_TID(cpl); 1138 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1139 struct tid_info *t = lldi->tids; 1140 1141 csk = lookup_tid(t, tid); 1142 if (unlikely(!csk)) { 1143 pr_err("can't find conn. for tid %u.\n", tid); 1144 goto rel_skb; 1145 } 1146 1147 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1148 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1149 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1150 pdu_len_ddp); 1151 1152 spin_lock_bh(&csk->lock); 1153 1154 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1155 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1156 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1157 csk, csk->state, csk->flags, csk->tid); 1158 if (csk->state != CTP_ABORTING) 1159 goto abort_conn; 1160 else 1161 goto discard; 1162 } 1163 1164 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1165 cxgbi_skcb_flags(skb) = 0; 1166 1167 skb_reset_transport_header(skb); 1168 __skb_pull(skb, sizeof(*cpl)); 1169 __pskb_trim(skb, ntohs(cpl->len)); 1170 1171 if (!csk->skb_ulp_lhdr) { 1172 unsigned char *bhs; 1173 unsigned int hlen, dlen, plen; 1174 1175 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1176 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1177 csk, csk->state, csk->flags, csk->tid, skb); 1178 csk->skb_ulp_lhdr = skb; 1179 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1180 1181 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1182 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1183 csk->tid, cxgbi_skcb_tcp_seq(skb), 1184 csk->rcv_nxt); 1185 goto abort_conn; 1186 } 1187 1188 bhs = skb->data; 1189 hlen = ntohs(cpl->len); 1190 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1191 1192 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1193 if (is_t4(lldi->adapter_type)) 1194 plen -= 40; 1195 1196 if ((hlen + dlen) != plen) { 1197 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1198 "mismatch %u != %u + %u, seq 0x%x.\n", 1199 csk->tid, plen, hlen, dlen, 1200 cxgbi_skcb_tcp_seq(skb)); 1201 goto abort_conn; 1202 } 1203 1204 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1205 if (dlen) 1206 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1207 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1208 1209 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1210 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1211 csk, skb, *bhs, hlen, dlen, 1212 ntohl(*((unsigned int *)(bhs + 16))), 1213 ntohl(*((unsigned int *)(bhs + 24)))); 1214 1215 } else { 1216 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1217 1218 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1219 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1220 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1221 csk, csk->state, csk->flags, skb, lskb); 1222 } 1223 1224 __skb_queue_tail(&csk->receive_queue, skb); 1225 spin_unlock_bh(&csk->lock); 1226 return; 1227 1228 abort_conn: 1229 send_abort_req(csk); 1230 discard: 1231 spin_unlock_bh(&csk->lock); 1232 rel_skb: 1233 __kfree_skb(skb); 1234 } 1235 1236 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1237 { 1238 struct cxgbi_sock *csk; 1239 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1240 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1241 struct tid_info *t = lldi->tids; 1242 struct sk_buff *lskb; 1243 u32 tid = GET_TID(cpl); 1244 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1245 1246 csk = lookup_tid(t, tid); 1247 if (unlikely(!csk)) { 1248 pr_err("can't find conn. for tid %u.\n", tid); 1249 goto rel_skb; 1250 } 1251 1252 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1253 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1254 csk, csk->state, csk->flags, csk->tid, skb, 1255 skb->len, pdu_len_ddp); 1256 1257 spin_lock_bh(&csk->lock); 1258 1259 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1260 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1261 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1262 csk, csk->state, csk->flags, csk->tid); 1263 1264 if (csk->state != CTP_ABORTING) 1265 goto abort_conn; 1266 else 1267 goto discard; 1268 } 1269 1270 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq); 1271 cxgbi_skcb_flags(skb) = 0; 1272 1273 skb_reset_transport_header(skb); 1274 __skb_pull(skb, sizeof(*cpl)); 1275 __pskb_trim(skb, ntohs(cpl->len)); 1276 1277 if (!csk->skb_ulp_lhdr) 1278 csk->skb_ulp_lhdr = skb; 1279 1280 lskb = csk->skb_ulp_lhdr; 1281 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1282 1283 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1284 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1285 csk, csk->state, csk->flags, skb, lskb); 1286 1287 __skb_queue_tail(&csk->receive_queue, skb); 1288 spin_unlock_bh(&csk->lock); 1289 return; 1290 1291 abort_conn: 1292 send_abort_req(csk); 1293 discard: 1294 spin_unlock_bh(&csk->lock); 1295 rel_skb: 1296 __kfree_skb(skb); 1297 } 1298 1299 static void 1300 cxgb4i_process_ddpvld(struct cxgbi_sock *csk, 1301 struct sk_buff *skb, u32 ddpvld) 1302 { 1303 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1304 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1305 csk, skb, ddpvld, cxgbi_skcb_flags(skb)); 1306 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); 1307 } 1308 1309 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1310 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1311 csk, skb, ddpvld, cxgbi_skcb_flags(skb)); 1312 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); 1313 } 1314 1315 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1316 log_debug(1 << CXGBI_DBG_PDU_RX, 1317 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1318 csk, skb, ddpvld); 1319 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); 1320 } 1321 1322 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1323 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) { 1324 log_debug(1 << CXGBI_DBG_PDU_RX, 1325 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1326 csk, skb, ddpvld); 1327 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); 1328 } 1329 } 1330 1331 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1332 struct sk_buff *skb) 1333 { 1334 struct cxgbi_sock *csk; 1335 struct sk_buff *lskb; 1336 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1337 unsigned int tid = GET_TID(rpl); 1338 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1339 struct tid_info *t = lldi->tids; 1340 u32 ddpvld = be32_to_cpu(rpl->ddpvld); 1341 1342 csk = lookup_tid(t, tid); 1343 if (unlikely(!csk)) { 1344 pr_err("can't find connection for tid %u.\n", tid); 1345 goto rel_skb; 1346 } 1347 1348 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1349 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1350 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr); 1351 1352 spin_lock_bh(&csk->lock); 1353 1354 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1355 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1356 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1357 csk, csk->state, csk->flags, csk->tid); 1358 if (csk->state != CTP_ABORTING) 1359 goto abort_conn; 1360 else 1361 goto discard; 1362 } 1363 1364 if (!csk->skb_ulp_lhdr) { 1365 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1366 goto abort_conn; 1367 } 1368 1369 lskb = csk->skb_ulp_lhdr; 1370 csk->skb_ulp_lhdr = NULL; 1371 1372 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1373 1374 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1375 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1376 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1377 1378 cxgb4i_process_ddpvld(csk, lskb, ddpvld); 1379 1380 log_debug(1 << CXGBI_DBG_PDU_RX, 1381 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1382 csk, lskb, cxgbi_skcb_flags(lskb)); 1383 1384 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1385 cxgbi_conn_pdu_ready(csk); 1386 spin_unlock_bh(&csk->lock); 1387 goto rel_skb; 1388 1389 abort_conn: 1390 send_abort_req(csk); 1391 discard: 1392 spin_unlock_bh(&csk->lock); 1393 rel_skb: 1394 __kfree_skb(skb); 1395 } 1396 1397 static void 1398 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb) 1399 { 1400 struct cxgbi_sock *csk; 1401 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data; 1402 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1403 struct tid_info *t = lldi->tids; 1404 struct sk_buff *data_skb = NULL; 1405 u32 tid = GET_TID(rpl); 1406 u32 ddpvld = be32_to_cpu(rpl->ddpvld); 1407 u32 seq = be32_to_cpu(rpl->seq); 1408 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp); 1409 1410 csk = lookup_tid(t, tid); 1411 if (unlikely(!csk)) { 1412 pr_err("can't find connection for tid %u.\n", tid); 1413 goto rel_skb; 1414 } 1415 1416 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1417 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, " 1418 "pdu_len_ddp %u, status %u.\n", 1419 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr, 1420 ntohs(rpl->len), pdu_len_ddp, rpl->status); 1421 1422 spin_lock_bh(&csk->lock); 1423 1424 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1425 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1426 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1427 csk, csk->state, csk->flags, csk->tid); 1428 1429 if (csk->state != CTP_ABORTING) 1430 goto abort_conn; 1431 else 1432 goto discard; 1433 } 1434 1435 cxgbi_skcb_tcp_seq(skb) = seq; 1436 cxgbi_skcb_flags(skb) = 0; 1437 cxgbi_skcb_rx_pdulen(skb) = 0; 1438 1439 skb_reset_transport_header(skb); 1440 __skb_pull(skb, sizeof(*rpl)); 1441 __pskb_trim(skb, be16_to_cpu(rpl->len)); 1442 1443 csk->rcv_nxt = seq + pdu_len_ddp; 1444 1445 if (csk->skb_ulp_lhdr) { 1446 data_skb = skb_peek(&csk->receive_queue); 1447 if (!data_skb || 1448 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) { 1449 pr_err("Error! freelist data not found 0x%p, tid %u\n", 1450 data_skb, tid); 1451 1452 goto abort_conn; 1453 } 1454 __skb_unlink(data_skb, &csk->receive_queue); 1455 1456 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA); 1457 1458 __skb_queue_tail(&csk->receive_queue, skb); 1459 __skb_queue_tail(&csk->receive_queue, data_skb); 1460 } else { 1461 __skb_queue_tail(&csk->receive_queue, skb); 1462 } 1463 1464 csk->skb_ulp_lhdr = NULL; 1465 1466 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1467 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); 1468 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL); 1469 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc); 1470 1471 cxgb4i_process_ddpvld(csk, skb, ddpvld); 1472 1473 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n", 1474 csk, skb, cxgbi_skcb_flags(skb)); 1475 1476 cxgbi_conn_pdu_ready(csk); 1477 spin_unlock_bh(&csk->lock); 1478 1479 return; 1480 1481 abort_conn: 1482 send_abort_req(csk); 1483 discard: 1484 spin_unlock_bh(&csk->lock); 1485 rel_skb: 1486 __kfree_skb(skb); 1487 } 1488 1489 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1490 { 1491 struct cxgbi_sock *csk; 1492 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1493 unsigned int tid = GET_TID(rpl); 1494 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1495 struct tid_info *t = lldi->tids; 1496 1497 csk = lookup_tid(t, tid); 1498 if (unlikely(!csk)) 1499 pr_err("can't find connection for tid %u.\n", tid); 1500 else { 1501 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1502 "csk 0x%p,%u,0x%lx,%u.\n", 1503 csk, csk->state, csk->flags, csk->tid); 1504 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1505 rpl->seq_vld); 1506 } 1507 __kfree_skb(skb); 1508 } 1509 1510 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1511 { 1512 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1513 unsigned int tid = GET_TID(rpl); 1514 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1515 struct tid_info *t = lldi->tids; 1516 struct cxgbi_sock *csk; 1517 1518 csk = lookup_tid(t, tid); 1519 if (!csk) 1520 pr_err("can't find conn. for tid %u.\n", tid); 1521 1522 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1523 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1524 csk, csk->state, csk->flags, csk->tid, rpl->status); 1525 1526 if (rpl->status != CPL_ERR_NONE) 1527 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1528 csk, tid, rpl->status); 1529 1530 __kfree_skb(skb); 1531 } 1532 1533 static int alloc_cpls(struct cxgbi_sock *csk) 1534 { 1535 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1536 0, GFP_KERNEL); 1537 if (!csk->cpl_close) 1538 return -ENOMEM; 1539 1540 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1541 0, GFP_KERNEL); 1542 if (!csk->cpl_abort_req) 1543 goto free_cpls; 1544 1545 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1546 0, GFP_KERNEL); 1547 if (!csk->cpl_abort_rpl) 1548 goto free_cpls; 1549 return 0; 1550 1551 free_cpls: 1552 cxgbi_sock_free_cpl_skbs(csk); 1553 return -ENOMEM; 1554 } 1555 1556 static inline void l2t_put(struct cxgbi_sock *csk) 1557 { 1558 if (csk->l2t) { 1559 cxgb4_l2t_release(csk->l2t); 1560 csk->l2t = NULL; 1561 cxgbi_sock_put(csk); 1562 } 1563 } 1564 1565 static void release_offload_resources(struct cxgbi_sock *csk) 1566 { 1567 struct cxgb4_lld_info *lldi; 1568 #if IS_ENABLED(CONFIG_IPV6) 1569 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1570 #endif 1571 1572 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1573 "csk 0x%p,%u,0x%lx,%u.\n", 1574 csk, csk->state, csk->flags, csk->tid); 1575 1576 cxgbi_sock_free_cpl_skbs(csk); 1577 if (csk->wr_cred != csk->wr_max_cred) { 1578 cxgbi_sock_purge_wr_queue(csk); 1579 cxgbi_sock_reset_wr_list(csk); 1580 } 1581 1582 l2t_put(csk); 1583 #if IS_ENABLED(CONFIG_IPV6) 1584 if (csk->csk_family == AF_INET6) 1585 cxgb4_clip_release(ndev, 1586 (const u32 *)&csk->saddr6.sin6_addr, 1); 1587 #endif 1588 1589 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1590 free_atid(csk); 1591 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1592 lldi = cxgbi_cdev_priv(csk->cdev); 1593 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1594 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1595 cxgbi_sock_put(csk); 1596 } 1597 csk->dst = NULL; 1598 } 1599 1600 static int init_act_open(struct cxgbi_sock *csk) 1601 { 1602 struct cxgbi_device *cdev = csk->cdev; 1603 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1604 struct net_device *ndev = cdev->ports[csk->port_id]; 1605 struct sk_buff *skb = NULL; 1606 struct neighbour *n = NULL; 1607 void *daddr; 1608 unsigned int step; 1609 unsigned int size, size6; 1610 unsigned int linkspeed; 1611 unsigned int rcv_winf, snd_winf; 1612 1613 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1614 "csk 0x%p,%u,0x%lx,%u.\n", 1615 csk, csk->state, csk->flags, csk->tid); 1616 1617 if (csk->csk_family == AF_INET) 1618 daddr = &csk->daddr.sin_addr.s_addr; 1619 #if IS_ENABLED(CONFIG_IPV6) 1620 else if (csk->csk_family == AF_INET6) 1621 daddr = &csk->daddr6.sin6_addr; 1622 #endif 1623 else { 1624 pr_err("address family 0x%x not supported\n", csk->csk_family); 1625 goto rel_resource; 1626 } 1627 1628 n = dst_neigh_lookup(csk->dst, daddr); 1629 1630 if (!n) { 1631 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1632 goto rel_resource; 1633 } 1634 1635 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1636 if (csk->atid < 0) { 1637 pr_err("%s, NO atid available.\n", ndev->name); 1638 goto rel_resource_without_clip; 1639 } 1640 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1641 cxgbi_sock_get(csk); 1642 1643 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1644 if (!csk->l2t) { 1645 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1646 goto rel_resource_without_clip; 1647 } 1648 cxgbi_sock_get(csk); 1649 1650 #if IS_ENABLED(CONFIG_IPV6) 1651 if (csk->csk_family == AF_INET6) 1652 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1653 #endif 1654 1655 if (is_t4(lldi->adapter_type)) { 1656 size = sizeof(struct cpl_act_open_req); 1657 size6 = sizeof(struct cpl_act_open_req6); 1658 } else if (is_t5(lldi->adapter_type)) { 1659 size = sizeof(struct cpl_t5_act_open_req); 1660 size6 = sizeof(struct cpl_t5_act_open_req6); 1661 } else { 1662 size = sizeof(struct cpl_t6_act_open_req); 1663 size6 = sizeof(struct cpl_t6_act_open_req6); 1664 } 1665 1666 if (csk->csk_family == AF_INET) 1667 skb = alloc_wr(size, 0, GFP_NOIO); 1668 #if IS_ENABLED(CONFIG_IPV6) 1669 else 1670 skb = alloc_wr(size6, 0, GFP_NOIO); 1671 #endif 1672 1673 if (!skb) 1674 goto rel_resource; 1675 skb->sk = (struct sock *)csk; 1676 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1677 1678 if (!csk->mtu) 1679 csk->mtu = dst_mtu(csk->dst); 1680 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1681 csk->tx_chan = cxgb4_port_chan(ndev); 1682 csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type, 1683 cxgb4_port_viid(ndev)); 1684 step = lldi->ntxq / lldi->nchan; 1685 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1686 step = lldi->nrxq / lldi->nchan; 1687 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1688 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; 1689 csk->snd_win = cxgb4i_snd_win; 1690 csk->rcv_win = cxgb4i_rcv_win; 1691 if (cxgb4i_rcv_win <= 0) { 1692 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; 1693 rcv_winf = linkspeed / SPEED_10000; 1694 if (rcv_winf) 1695 csk->rcv_win *= rcv_winf; 1696 } 1697 if (cxgb4i_snd_win <= 0) { 1698 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; 1699 snd_winf = linkspeed / SPEED_10000; 1700 if (snd_winf) 1701 csk->snd_win *= snd_winf; 1702 } 1703 csk->wr_cred = lldi->wr_cred - 1704 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1705 csk->wr_max_cred = csk->wr_cred; 1706 csk->wr_una_cred = 0; 1707 cxgbi_sock_reset_wr_list(csk); 1708 csk->err = 0; 1709 1710 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1711 (&csk->saddr), (&csk->daddr), csk, csk->state, 1712 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1713 csk->mtu, csk->mss_idx, csk->smac_idx); 1714 1715 /* must wait for either a act_open_rpl or act_open_establish */ 1716 if (!try_module_get(cdev->owner)) { 1717 pr_err("%s, try_module_get failed.\n", ndev->name); 1718 goto rel_resource; 1719 } 1720 1721 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1722 if (csk->csk_family == AF_INET) 1723 send_act_open_req(csk, skb, csk->l2t); 1724 #if IS_ENABLED(CONFIG_IPV6) 1725 else 1726 send_act_open_req6(csk, skb, csk->l2t); 1727 #endif 1728 neigh_release(n); 1729 1730 return 0; 1731 1732 rel_resource: 1733 #if IS_ENABLED(CONFIG_IPV6) 1734 if (csk->csk_family == AF_INET6) 1735 cxgb4_clip_release(ndev, 1736 (const u32 *)&csk->saddr6.sin6_addr, 1); 1737 #endif 1738 rel_resource_without_clip: 1739 if (n) 1740 neigh_release(n); 1741 if (skb) 1742 __kfree_skb(skb); 1743 return -EINVAL; 1744 } 1745 1746 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1747 [CPL_ACT_ESTABLISH] = do_act_establish, 1748 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1749 [CPL_PEER_CLOSE] = do_peer_close, 1750 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1751 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1752 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1753 [CPL_FW4_ACK] = do_fw4_ack, 1754 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1755 [CPL_ISCSI_DATA] = do_rx_iscsi_data, 1756 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1757 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1758 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1759 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp, 1760 [CPL_RX_DATA] = do_rx_data, 1761 }; 1762 1763 static int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1764 { 1765 int rc; 1766 1767 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1768 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1769 1770 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1771 cxgb4i_max_connect); 1772 if (rc < 0) 1773 return rc; 1774 1775 cdev->csk_release_offload_resources = release_offload_resources; 1776 cdev->csk_push_tx_frames = push_tx_frames; 1777 cdev->csk_send_abort_req = send_abort_req; 1778 cdev->csk_send_close_req = send_close_req; 1779 cdev->csk_send_rx_credits = send_rx_credits; 1780 cdev->csk_alloc_cpls = alloc_cpls; 1781 cdev->csk_init_act_open = init_act_open; 1782 1783 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1784 return 0; 1785 } 1786 1787 static inline void 1788 ulp_mem_io_set_hdr(struct cxgbi_device *cdev, 1789 struct ulp_mem_io *req, 1790 unsigned int wr_len, unsigned int dlen, 1791 unsigned int pm_addr, 1792 int tid) 1793 { 1794 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1795 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1796 1797 INIT_ULPTX_WR(req, wr_len, 0, tid); 1798 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | 1799 FW_WR_ATOMIC_V(0)); 1800 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1801 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | 1802 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); 1803 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1804 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1805 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1806 1807 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1808 idata->len = htonl(dlen); 1809 } 1810 1811 static struct sk_buff * 1812 ddp_ppod_init_idata(struct cxgbi_device *cdev, 1813 struct cxgbi_ppm *ppm, 1814 unsigned int idx, unsigned int npods, 1815 unsigned int tid) 1816 { 1817 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1818 unsigned int dlen = npods << PPOD_SIZE_SHIFT; 1819 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1820 sizeof(struct ulptx_idata) + dlen, 16); 1821 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1822 1823 if (!skb) { 1824 pr_err("%s: %s idx %u, npods %u, OOM.\n", 1825 __func__, ppm->ndev->name, idx, npods); 1826 return NULL; 1827 } 1828 1829 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, 1830 pm_addr, tid); 1831 1832 return skb; 1833 } 1834 1835 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1836 struct cxgbi_task_tag_info *ttinfo, 1837 unsigned int idx, unsigned int npods, 1838 struct scatterlist **sg_pp, 1839 unsigned int *sg_off) 1840 { 1841 struct cxgbi_device *cdev = csk->cdev; 1842 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, 1843 csk->tid); 1844 struct ulp_mem_io *req; 1845 struct ulptx_idata *idata; 1846 struct cxgbi_pagepod *ppod; 1847 int i; 1848 1849 if (!skb) 1850 return -ENOMEM; 1851 1852 req = (struct ulp_mem_io *)skb->head; 1853 idata = (struct ulptx_idata *)(req + 1); 1854 ppod = (struct cxgbi_pagepod *)(idata + 1); 1855 1856 for (i = 0; i < npods; i++, ppod++) 1857 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); 1858 1859 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); 1860 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); 1861 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 1862 1863 spin_lock_bh(&csk->lock); 1864 cxgbi_sock_skb_entail(csk, skb); 1865 spin_unlock_bh(&csk->lock); 1866 1867 return 0; 1868 } 1869 1870 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1871 struct cxgbi_task_tag_info *ttinfo) 1872 { 1873 unsigned int pidx = ttinfo->idx; 1874 unsigned int npods = ttinfo->npods; 1875 unsigned int i, cnt; 1876 int err = 0; 1877 struct scatterlist *sg = ttinfo->sgl; 1878 unsigned int offset = 0; 1879 1880 ttinfo->cid = csk->port_id; 1881 1882 for (i = 0; i < npods; i += cnt, pidx += cnt) { 1883 cnt = npods - i; 1884 1885 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1886 cnt = ULPMEM_IDATA_MAX_NPPODS; 1887 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, 1888 &sg, &offset); 1889 if (err < 0) 1890 break; 1891 } 1892 1893 return err; 1894 } 1895 1896 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1897 int pg_idx, bool reply) 1898 { 1899 struct sk_buff *skb; 1900 struct cpl_set_tcb_field *req; 1901 1902 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1903 return 0; 1904 1905 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1906 if (!skb) 1907 return -ENOMEM; 1908 1909 /* set up ulp page size */ 1910 req = (struct cpl_set_tcb_field *)skb->head; 1911 INIT_TP_WR(req, csk->tid); 1912 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1913 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1914 req->word_cookie = htons(0); 1915 req->mask = cpu_to_be64(0x3 << 8); 1916 req->val = cpu_to_be64(pg_idx << 8); 1917 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1918 1919 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1920 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1921 1922 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1923 return 0; 1924 } 1925 1926 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1927 int hcrc, int dcrc, int reply) 1928 { 1929 struct sk_buff *skb; 1930 struct cpl_set_tcb_field *req; 1931 1932 if (!hcrc && !dcrc) 1933 return 0; 1934 1935 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1936 if (!skb) 1937 return -ENOMEM; 1938 1939 csk->hcrc_len = (hcrc ? 4 : 0); 1940 csk->dcrc_len = (dcrc ? 4 : 0); 1941 /* set up ulp submode */ 1942 req = (struct cpl_set_tcb_field *)skb->head; 1943 INIT_TP_WR(req, tid); 1944 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1945 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1946 req->word_cookie = htons(0); 1947 req->mask = cpu_to_be64(0x3 << 4); 1948 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1949 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1950 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1951 1952 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1953 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1954 1955 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1956 return 0; 1957 } 1958 1959 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) 1960 { 1961 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) 1962 (cxgbi_cdev_priv(cdev)))->iscsi_ppm); 1963 } 1964 1965 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1966 { 1967 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1968 struct net_device *ndev = cdev->ports[0]; 1969 struct cxgbi_tag_format tformat; 1970 unsigned int ppmax; 1971 int i; 1972 1973 if (!lldi->vr->iscsi.size) { 1974 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); 1975 return -EACCES; 1976 } 1977 1978 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; 1979 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; 1980 1981 memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); 1982 for (i = 0; i < 4; i++) 1983 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) 1984 & 0xF; 1985 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); 1986 1987 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, 1988 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); 1989 1990 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1991 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1992 cdev->csk_ddp_set_map = ddp_set_map; 1993 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1994 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1995 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1996 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1997 cdev->cdev2ppm = cdev2ppm; 1998 1999 return 0; 2000 } 2001 2002 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 2003 { 2004 struct cxgbi_device *cdev; 2005 struct port_info *pi; 2006 int i, rc; 2007 2008 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 2009 if (!cdev) { 2010 pr_info("t4 device 0x%p, register failed.\n", lldi); 2011 return NULL; 2012 } 2013 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 2014 cdev, lldi->adapter_type, lldi->nports, 2015 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 2016 lldi->nrxq, lldi->wr_cred); 2017 for (i = 0; i < lldi->nrxq; i++) 2018 log_debug(1 << CXGBI_DBG_DEV, 2019 "t4 0x%p, rxq id #%d: %u.\n", 2020 cdev, i, lldi->rxq_ids[i]); 2021 2022 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 2023 cdev->flags = CXGBI_FLAG_DEV_T4; 2024 cdev->pdev = lldi->pdev; 2025 cdev->ports = lldi->ports; 2026 cdev->nports = lldi->nports; 2027 cdev->mtus = lldi->mtus; 2028 cdev->nmtus = NMTUS; 2029 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <= 2030 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0; 2031 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 2032 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 2033 cdev->itp = &cxgb4i_iscsi_transport; 2034 cdev->owner = THIS_MODULE; 2035 2036 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 2037 << FW_VIID_PFN_S; 2038 pr_info("cdev 0x%p,%s, pfvf %u.\n", 2039 cdev, lldi->ports[0]->name, cdev->pfvf); 2040 2041 rc = cxgb4i_ddp_init(cdev); 2042 if (rc) { 2043 pr_info("t4 0x%p ddp init failed.\n", cdev); 2044 goto err_out; 2045 } 2046 rc = cxgb4i_ofld_init(cdev); 2047 if (rc) { 2048 pr_info("t4 0x%p ofld init failed.\n", cdev); 2049 goto err_out; 2050 } 2051 2052 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 2053 &cxgb4i_host_template, cxgb4i_stt); 2054 if (rc) 2055 goto err_out; 2056 2057 for (i = 0; i < cdev->nports; i++) { 2058 pi = netdev_priv(lldi->ports[i]); 2059 cdev->hbas[i]->port_id = pi->port_id; 2060 } 2061 return cdev; 2062 2063 err_out: 2064 cxgbi_device_unregister(cdev); 2065 return ERR_PTR(-ENOMEM); 2066 } 2067 2068 #define RX_PULL_LEN 128 2069 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 2070 const struct pkt_gl *pgl) 2071 { 2072 const struct cpl_act_establish *rpl; 2073 struct sk_buff *skb; 2074 unsigned int opc; 2075 struct cxgbi_device *cdev = handle; 2076 2077 if (pgl == NULL) { 2078 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 2079 2080 skb = alloc_wr(len, 0, GFP_ATOMIC); 2081 if (!skb) 2082 goto nomem; 2083 skb_copy_to_linear_data(skb, &rsp[1], len); 2084 } else { 2085 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 2086 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 2087 pgl->va, be64_to_cpu(*rsp), 2088 be64_to_cpu(*(u64 *)pgl->va), 2089 pgl->tot_len); 2090 return 0; 2091 } 2092 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 2093 if (unlikely(!skb)) 2094 goto nomem; 2095 } 2096 2097 rpl = (struct cpl_act_establish *)skb->data; 2098 opc = rpl->ot.opcode; 2099 log_debug(1 << CXGBI_DBG_TOE, 2100 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 2101 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 2102 if (cxgb4i_cplhandlers[opc]) 2103 cxgb4i_cplhandlers[opc](cdev, skb); 2104 else { 2105 pr_err("No handler for opcode 0x%x.\n", opc); 2106 __kfree_skb(skb); 2107 } 2108 return 0; 2109 nomem: 2110 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 2111 return 1; 2112 } 2113 2114 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 2115 { 2116 struct cxgbi_device *cdev = handle; 2117 2118 switch (state) { 2119 case CXGB4_STATE_UP: 2120 pr_info("cdev 0x%p, UP.\n", cdev); 2121 break; 2122 case CXGB4_STATE_START_RECOVERY: 2123 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 2124 /* close all connections */ 2125 break; 2126 case CXGB4_STATE_DOWN: 2127 pr_info("cdev 0x%p, DOWN.\n", cdev); 2128 break; 2129 case CXGB4_STATE_DETACH: 2130 pr_info("cdev 0x%p, DETACH.\n", cdev); 2131 cxgbi_device_unregister(cdev); 2132 break; 2133 default: 2134 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 2135 break; 2136 } 2137 return 0; 2138 } 2139 2140 static int __init cxgb4i_init_module(void) 2141 { 2142 int rc; 2143 2144 printk(KERN_INFO "%s", version); 2145 2146 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 2147 if (rc < 0) 2148 return rc; 2149 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 2150 2151 return 0; 2152 } 2153 2154 static void __exit cxgb4i_exit_module(void) 2155 { 2156 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 2157 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 2158 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 2159 } 2160 2161 module_init(cxgb4i_init_module); 2162 module_exit(cxgb4i_exit_module); 2163