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 #include <net/addrconf.h> 23 24 #include "t4_regs.h" 25 #include "t4_msg.h" 26 #include "cxgb4.h" 27 #include "cxgb4_uld.h" 28 #include "t4fw_api.h" 29 #include "l2t.h" 30 #include "cxgb4i.h" 31 32 static unsigned int dbg_level; 33 34 #include "../libcxgbi.h" 35 36 #define DRV_MODULE_NAME "cxgb4i" 37 #define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver" 38 #define DRV_MODULE_VERSION "0.9.4" 39 40 static char version[] = 41 DRV_MODULE_DESC " " DRV_MODULE_NAME 42 " v" DRV_MODULE_VERSION "\n"; 43 44 MODULE_AUTHOR("Chelsio Communications, Inc."); 45 MODULE_DESCRIPTION(DRV_MODULE_DESC); 46 MODULE_VERSION(DRV_MODULE_VERSION); 47 MODULE_LICENSE("GPL"); 48 49 module_param(dbg_level, uint, 0644); 50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 51 52 static int cxgb4i_rcv_win = 256 * 1024; 53 module_param(cxgb4i_rcv_win, int, 0644); 54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 55 56 static int cxgb4i_snd_win = 128 * 1024; 57 module_param(cxgb4i_snd_win, int, 0644); 58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 59 60 static int cxgb4i_rx_credit_thres = 10 * 1024; 61 module_param(cxgb4i_rx_credit_thres, int, 0644); 62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 63 "RX credits return threshold in bytes (default=10KB)"); 64 65 static unsigned int cxgb4i_max_connect = (8 * 1024); 66 module_param(cxgb4i_max_connect, uint, 0644); 67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 68 69 static unsigned short cxgb4i_sport_base = 20000; 70 module_param(cxgb4i_sport_base, ushort, 0644); 71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 72 73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 74 75 static void *t4_uld_add(const struct cxgb4_lld_info *); 76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 77 static int t4_uld_state_change(void *, enum cxgb4_state state); 78 79 static const struct cxgb4_uld_info cxgb4i_uld_info = { 80 .name = DRV_MODULE_NAME, 81 .add = t4_uld_add, 82 .rx_handler = t4_uld_rx_handler, 83 .state_change = t4_uld_state_change, 84 }; 85 86 static struct scsi_host_template cxgb4i_host_template = { 87 .module = THIS_MODULE, 88 .name = DRV_MODULE_NAME, 89 .proc_name = DRV_MODULE_NAME, 90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 91 .queuecommand = iscsi_queuecommand, 92 .change_queue_depth = iscsi_change_queue_depth, 93 .sg_tablesize = SG_ALL, 94 .max_sectors = 0xFFFF, 95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 96 .eh_abort_handler = iscsi_eh_abort, 97 .eh_device_reset_handler = iscsi_eh_device_reset, 98 .eh_target_reset_handler = iscsi_eh_recover_target, 99 .target_alloc = iscsi_target_alloc, 100 .use_clustering = DISABLE_CLUSTERING, 101 .this_id = -1, 102 }; 103 104 static struct iscsi_transport cxgb4i_iscsi_transport = { 105 .owner = THIS_MODULE, 106 .name = DRV_MODULE_NAME, 107 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 108 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 109 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 110 .attr_is_visible = cxgbi_attr_is_visible, 111 .get_host_param = cxgbi_get_host_param, 112 .set_host_param = cxgbi_set_host_param, 113 /* session management */ 114 .create_session = cxgbi_create_session, 115 .destroy_session = cxgbi_destroy_session, 116 .get_session_param = iscsi_session_get_param, 117 /* connection management */ 118 .create_conn = cxgbi_create_conn, 119 .bind_conn = cxgbi_bind_conn, 120 .destroy_conn = iscsi_tcp_conn_teardown, 121 .start_conn = iscsi_conn_start, 122 .stop_conn = iscsi_conn_stop, 123 .get_conn_param = iscsi_conn_get_param, 124 .set_param = cxgbi_set_conn_param, 125 .get_stats = cxgbi_get_conn_stats, 126 /* pdu xmit req from user space */ 127 .send_pdu = iscsi_conn_send_pdu, 128 /* task */ 129 .init_task = iscsi_tcp_task_init, 130 .xmit_task = iscsi_tcp_task_xmit, 131 .cleanup_task = cxgbi_cleanup_task, 132 /* pdu */ 133 .alloc_pdu = cxgbi_conn_alloc_pdu, 134 .init_pdu = cxgbi_conn_init_pdu, 135 .xmit_pdu = cxgbi_conn_xmit_pdu, 136 .parse_pdu_itt = cxgbi_parse_pdu_itt, 137 /* TCP connect/disconnect */ 138 .get_ep_param = cxgbi_get_ep_param, 139 .ep_connect = cxgbi_ep_connect, 140 .ep_poll = cxgbi_ep_poll, 141 .ep_disconnect = cxgbi_ep_disconnect, 142 /* Error recovery timeout call */ 143 .session_recovery_timedout = iscsi_session_recovery_timedout, 144 }; 145 146 static struct scsi_transport_template *cxgb4i_stt; 147 148 /* 149 * CPL (Chelsio Protocol Language) defines a message passing interface between 150 * the host driver and Chelsio asic. 151 * The section below implments CPLs that related to iscsi tcp connection 152 * open/close/abort and data send/receive. 153 */ 154 155 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 156 #define RCV_BUFSIZ_MASK 0x3FFU 157 #define MAX_IMM_TX_PKT_LEN 128 158 159 static inline void set_queue(struct sk_buff *skb, unsigned int queue, 160 const struct cxgbi_sock *csk) 161 { 162 skb->queue_mapping = queue; 163 } 164 165 static int push_tx_frames(struct cxgbi_sock *, int); 166 167 /* 168 * is_ofld_imm - check whether a packet can be sent as immediate data 169 * @skb: the packet 170 * 171 * Returns true if a packet can be sent as an offload WR with immediate 172 * data. We currently use the same limit as for Ethernet packets. 173 */ 174 static inline int is_ofld_imm(const struct sk_buff *skb) 175 { 176 return skb->len <= (MAX_IMM_TX_PKT_LEN - 177 sizeof(struct fw_ofld_tx_data_wr)); 178 } 179 180 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 181 struct l2t_entry *e) 182 { 183 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 184 int t4 = is_t4(lldi->adapter_type); 185 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 186 unsigned long long opt0; 187 unsigned int opt2; 188 unsigned int qid_atid = ((unsigned int)csk->atid) | 189 (((unsigned int)csk->rss_qid) << 14); 190 191 opt0 = KEEP_ALIVE(1) | 192 WND_SCALE(wscale) | 193 MSS_IDX(csk->mss_idx) | 194 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | 195 TX_CHAN(csk->tx_chan) | 196 SMAC_SEL(csk->smac_idx) | 197 ULP_MODE(ULP_MODE_ISCSI) | 198 RCV_BUFSIZ(cxgb4i_rcv_win >> 10); 199 opt2 = RX_CHANNEL(0) | 200 RSS_QUEUE_VALID | 201 (1 << 20) | 202 RSS_QUEUE(csk->rss_qid); 203 204 if (is_t4(lldi->adapter_type)) { 205 struct cpl_act_open_req *req = 206 (struct cpl_act_open_req *)skb->head; 207 208 INIT_TP_WR(req, 0); 209 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 210 qid_atid)); 211 req->local_port = csk->saddr.sin_port; 212 req->peer_port = csk->daddr.sin_port; 213 req->local_ip = csk->saddr.sin_addr.s_addr; 214 req->peer_ip = csk->daddr.sin_addr.s_addr; 215 req->opt0 = cpu_to_be64(opt0); 216 req->params = cpu_to_be32(cxgb4_select_ntuple( 217 csk->cdev->ports[csk->port_id], 218 csk->l2t)); 219 opt2 |= 1 << 22; 220 req->opt2 = cpu_to_be32(opt2); 221 222 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 223 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 224 csk, &req->local_ip, ntohs(req->local_port), 225 &req->peer_ip, ntohs(req->peer_port), 226 csk->atid, csk->rss_qid); 227 } else { 228 struct cpl_t5_act_open_req *req = 229 (struct cpl_t5_act_open_req *)skb->head; 230 231 INIT_TP_WR(req, 0); 232 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 233 qid_atid)); 234 req->local_port = csk->saddr.sin_port; 235 req->peer_port = csk->daddr.sin_port; 236 req->local_ip = csk->saddr.sin_addr.s_addr; 237 req->peer_ip = csk->daddr.sin_addr.s_addr; 238 req->opt0 = cpu_to_be64(opt0); 239 req->params = cpu_to_be64(V_FILTER_TUPLE( 240 cxgb4_select_ntuple( 241 csk->cdev->ports[csk->port_id], 242 csk->l2t))); 243 opt2 |= 1 << 31; 244 req->opt2 = cpu_to_be32(opt2); 245 246 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 247 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 248 csk, &req->local_ip, ntohs(req->local_port), 249 &req->peer_ip, ntohs(req->peer_port), 250 csk->atid, csk->rss_qid); 251 } 252 253 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 254 255 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 256 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk, 257 csk->state, csk->flags, csk->atid, csk->rss_qid); 258 259 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 260 } 261 262 #if IS_ENABLED(CONFIG_IPV6) 263 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 264 struct l2t_entry *e) 265 { 266 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 267 int t4 = is_t4(lldi->adapter_type); 268 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 269 unsigned long long opt0; 270 unsigned int opt2; 271 unsigned int qid_atid = ((unsigned int)csk->atid) | 272 (((unsigned int)csk->rss_qid) << 14); 273 274 opt0 = KEEP_ALIVE(1) | 275 WND_SCALE(wscale) | 276 MSS_IDX(csk->mss_idx) | 277 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | 278 TX_CHAN(csk->tx_chan) | 279 SMAC_SEL(csk->smac_idx) | 280 ULP_MODE(ULP_MODE_ISCSI) | 281 RCV_BUFSIZ(cxgb4i_rcv_win >> 10); 282 283 opt2 = RX_CHANNEL(0) | 284 RSS_QUEUE_VALID | 285 RX_FC_DISABLE | 286 RSS_QUEUE(csk->rss_qid); 287 288 if (t4) { 289 struct cpl_act_open_req6 *req = 290 (struct cpl_act_open_req6 *)skb->head; 291 292 INIT_TP_WR(req, 0); 293 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 294 qid_atid)); 295 req->local_port = csk->saddr6.sin6_port; 296 req->peer_port = csk->daddr6.sin6_port; 297 298 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 299 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 300 8); 301 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 302 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 303 8); 304 305 req->opt0 = cpu_to_be64(opt0); 306 307 opt2 |= RX_FC_VALID; 308 req->opt2 = cpu_to_be32(opt2); 309 310 req->params = cpu_to_be32(cxgb4_select_ntuple( 311 csk->cdev->ports[csk->port_id], 312 csk->l2t)); 313 } else { 314 struct cpl_t5_act_open_req6 *req = 315 (struct cpl_t5_act_open_req6 *)skb->head; 316 317 INIT_TP_WR(req, 0); 318 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 319 qid_atid)); 320 req->local_port = csk->saddr6.sin6_port; 321 req->peer_port = csk->daddr6.sin6_port; 322 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 323 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 324 8); 325 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 326 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 327 8); 328 req->opt0 = cpu_to_be64(opt0); 329 330 opt2 |= T5_OPT_2_VALID; 331 req->opt2 = cpu_to_be32(opt2); 332 333 req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple( 334 csk->cdev->ports[csk->port_id], 335 csk->l2t))); 336 } 337 338 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 339 340 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 341 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid, 342 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 343 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 344 csk->rss_qid); 345 346 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 347 } 348 #endif 349 350 static void send_close_req(struct cxgbi_sock *csk) 351 { 352 struct sk_buff *skb = csk->cpl_close; 353 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 354 unsigned int tid = csk->tid; 355 356 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 357 "csk 0x%p,%u,0x%lx, tid %u.\n", 358 csk, csk->state, csk->flags, csk->tid); 359 csk->cpl_close = NULL; 360 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 361 INIT_TP_WR(req, tid); 362 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 363 req->rsvd = 0; 364 365 cxgbi_sock_skb_entail(csk, skb); 366 if (csk->state >= CTP_ESTABLISHED) 367 push_tx_frames(csk, 1); 368 } 369 370 static void abort_arp_failure(void *handle, struct sk_buff *skb) 371 { 372 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 373 struct cpl_abort_req *req; 374 375 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 376 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 377 csk, csk->state, csk->flags, csk->tid); 378 req = (struct cpl_abort_req *)skb->data; 379 req->cmd = CPL_ABORT_NO_RST; 380 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 381 } 382 383 static void send_abort_req(struct cxgbi_sock *csk) 384 { 385 struct cpl_abort_req *req; 386 struct sk_buff *skb = csk->cpl_abort_req; 387 388 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 389 return; 390 cxgbi_sock_set_state(csk, CTP_ABORTING); 391 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 392 cxgbi_sock_purge_write_queue(csk); 393 394 csk->cpl_abort_req = NULL; 395 req = (struct cpl_abort_req *)skb->head; 396 set_queue(skb, CPL_PRIORITY_DATA, csk); 397 req->cmd = CPL_ABORT_SEND_RST; 398 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 399 INIT_TP_WR(req, csk->tid); 400 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 401 req->rsvd0 = htonl(csk->snd_nxt); 402 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 403 404 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 405 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 406 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 407 req->rsvd1); 408 409 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 410 } 411 412 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 413 { 414 struct sk_buff *skb = csk->cpl_abort_rpl; 415 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 416 417 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 418 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 419 csk, csk->state, csk->flags, csk->tid, rst_status); 420 421 csk->cpl_abort_rpl = NULL; 422 set_queue(skb, CPL_PRIORITY_DATA, csk); 423 INIT_TP_WR(rpl, csk->tid); 424 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 425 rpl->cmd = rst_status; 426 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 427 } 428 429 /* 430 * CPL connection rx data ack: host -> 431 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 432 * credits sent. 433 */ 434 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 435 { 436 struct sk_buff *skb; 437 struct cpl_rx_data_ack *req; 438 439 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 440 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 441 csk, csk->state, csk->flags, csk->tid, credits); 442 443 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 444 if (!skb) { 445 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 446 return 0; 447 } 448 req = (struct cpl_rx_data_ack *)skb->head; 449 450 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 451 INIT_TP_WR(req, csk->tid); 452 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 453 csk->tid)); 454 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1)); 455 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 456 return credits; 457 } 458 459 /* 460 * sgl_len - calculates the size of an SGL of the given capacity 461 * @n: the number of SGL entries 462 * Calculates the number of flits needed for a scatter/gather list that 463 * can hold the given number of entries. 464 */ 465 static inline unsigned int sgl_len(unsigned int n) 466 { 467 n--; 468 return (3 * n) / 2 + (n & 1) + 2; 469 } 470 471 /* 472 * calc_tx_flits_ofld - calculate # of flits for an offload packet 473 * @skb: the packet 474 * 475 * Returns the number of flits needed for the given offload packet. 476 * These packets are already fully constructed and no additional headers 477 * will be added. 478 */ 479 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 480 { 481 unsigned int flits, cnt; 482 483 if (is_ofld_imm(skb)) 484 return DIV_ROUND_UP(skb->len, 8); 485 flits = skb_transport_offset(skb) / 8; 486 cnt = skb_shinfo(skb)->nr_frags; 487 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 488 cnt++; 489 return flits + sgl_len(cnt); 490 } 491 492 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) 493 { 494 struct sk_buff *skb; 495 struct fw_flowc_wr *flowc; 496 int flowclen, i; 497 498 flowclen = 80; 499 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 500 flowc = (struct fw_flowc_wr *)skb->head; 501 flowc->op_to_nparams = 502 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); 503 flowc->flowid_len16 = 504 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | 505 FW_WR_FLOWID(csk->tid)); 506 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 507 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 508 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 509 flowc->mnemval[1].val = htonl(csk->tx_chan); 510 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 511 flowc->mnemval[2].val = htonl(csk->tx_chan); 512 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 513 flowc->mnemval[3].val = htonl(csk->rss_qid); 514 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 515 flowc->mnemval[4].val = htonl(csk->snd_nxt); 516 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 517 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 518 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 519 flowc->mnemval[6].val = htonl(cxgb4i_snd_win); 520 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 521 flowc->mnemval[7].val = htonl(csk->advmss); 522 flowc->mnemval[8].mnemonic = 0; 523 flowc->mnemval[8].val = 0; 524 for (i = 0; i < 9; i++) { 525 flowc->mnemval[i].r4[0] = 0; 526 flowc->mnemval[i].r4[1] = 0; 527 flowc->mnemval[i].r4[2] = 0; 528 } 529 set_queue(skb, CPL_PRIORITY_DATA, csk); 530 531 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 532 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 533 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 534 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, 535 csk->advmss); 536 537 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 538 } 539 540 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 541 int dlen, int len, u32 credits, int compl) 542 { 543 struct fw_ofld_tx_data_wr *req; 544 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 545 unsigned int wr_ulp_mode = 0; 546 547 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 548 549 if (is_ofld_imm(skb)) { 550 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 551 FW_WR_COMPL(1) | 552 FW_WR_IMMDLEN(dlen)); 553 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | 554 FW_WR_LEN16(credits)); 555 } else { 556 req->op_to_immdlen = 557 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 558 FW_WR_COMPL(1) | 559 FW_WR_IMMDLEN(0)); 560 req->flowid_len16 = 561 cpu_to_be32(FW_WR_FLOWID(csk->tid) | 562 FW_WR_LEN16(credits)); 563 } 564 if (submode) 565 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | 566 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); 567 req->tunnel_to_proxy = htonl(wr_ulp_mode | 568 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1)); 569 req->plen = htonl(len); 570 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 571 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 572 } 573 574 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 575 { 576 kfree_skb(skb); 577 } 578 579 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 580 { 581 int total_size = 0; 582 struct sk_buff *skb; 583 584 if (unlikely(csk->state < CTP_ESTABLISHED || 585 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 586 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 587 1 << CXGBI_DBG_PDU_TX, 588 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 589 csk, csk->state, csk->flags, csk->tid); 590 return 0; 591 } 592 593 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 594 int dlen = skb->len; 595 int len = skb->len; 596 unsigned int credits_needed; 597 598 skb_reset_transport_header(skb); 599 if (is_ofld_imm(skb)) 600 credits_needed = DIV_ROUND_UP(dlen + 601 sizeof(struct fw_ofld_tx_data_wr), 16); 602 else 603 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) 604 + sizeof(struct fw_ofld_tx_data_wr), 605 16); 606 607 if (csk->wr_cred < credits_needed) { 608 log_debug(1 << CXGBI_DBG_PDU_TX, 609 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 610 csk, skb->len, skb->data_len, 611 credits_needed, csk->wr_cred); 612 break; 613 } 614 __skb_unlink(skb, &csk->write_queue); 615 set_queue(skb, CPL_PRIORITY_DATA, csk); 616 skb->csum = credits_needed; 617 csk->wr_cred -= credits_needed; 618 csk->wr_una_cred += credits_needed; 619 cxgbi_sock_enqueue_wr(csk, skb); 620 621 log_debug(1 << CXGBI_DBG_PDU_TX, 622 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 623 csk, skb->len, skb->data_len, credits_needed, 624 csk->wr_cred, csk->wr_una_cred); 625 626 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 627 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 628 send_tx_flowc_wr(csk); 629 skb->csum += 5; 630 csk->wr_cred -= 5; 631 csk->wr_una_cred += 5; 632 } 633 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 634 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 635 req_completion); 636 csk->snd_nxt += len; 637 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 638 } 639 total_size += skb->truesize; 640 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 641 642 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 643 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 644 csk, csk->state, csk->flags, csk->tid, skb, len); 645 646 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 647 } 648 return total_size; 649 } 650 651 static inline void free_atid(struct cxgbi_sock *csk) 652 { 653 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 654 655 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 656 cxgb4_free_atid(lldi->tids, csk->atid); 657 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 658 cxgbi_sock_put(csk); 659 } 660 } 661 662 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 663 { 664 struct cxgbi_sock *csk; 665 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 666 unsigned short tcp_opt = ntohs(req->tcp_opt); 667 unsigned int tid = GET_TID(req); 668 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); 669 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 670 struct tid_info *t = lldi->tids; 671 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 672 673 csk = lookup_atid(t, atid); 674 if (unlikely(!csk)) { 675 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 676 goto rel_skb; 677 } 678 679 if (csk->atid != atid) { 680 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 681 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 682 goto rel_skb; 683 } 684 685 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 686 (&csk->saddr), (&csk->daddr), 687 atid, tid, csk, csk->state, csk->flags, rcv_isn); 688 689 module_put(THIS_MODULE); 690 691 cxgbi_sock_get(csk); 692 csk->tid = tid; 693 cxgb4_insert_tid(lldi->tids, csk, tid); 694 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 695 696 free_atid(csk); 697 698 spin_lock_bh(&csk->lock); 699 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 700 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 701 csk, csk->state, csk->flags, csk->tid); 702 703 if (csk->retry_timer.function) { 704 del_timer(&csk->retry_timer); 705 csk->retry_timer.function = NULL; 706 } 707 708 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 709 /* 710 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 711 * pass through opt0. 712 */ 713 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) 714 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); 715 716 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; 717 if (GET_TCPOPT_TSTAMP(tcp_opt)) 718 csk->advmss -= 12; 719 if (csk->advmss < 128) 720 csk->advmss = 128; 721 722 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 723 "csk 0x%p, mss_idx %u, advmss %u.\n", 724 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss); 725 726 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 727 728 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 729 send_abort_req(csk); 730 else { 731 if (skb_queue_len(&csk->write_queue)) 732 push_tx_frames(csk, 0); 733 cxgbi_conn_tx_open(csk); 734 } 735 spin_unlock_bh(&csk->lock); 736 737 rel_skb: 738 __kfree_skb(skb); 739 } 740 741 static int act_open_rpl_status_to_errno(int status) 742 { 743 switch (status) { 744 case CPL_ERR_CONN_RESET: 745 return -ECONNREFUSED; 746 case CPL_ERR_ARP_MISS: 747 return -EHOSTUNREACH; 748 case CPL_ERR_CONN_TIMEDOUT: 749 return -ETIMEDOUT; 750 case CPL_ERR_TCAM_FULL: 751 return -ENOMEM; 752 case CPL_ERR_CONN_EXIST: 753 return -EADDRINUSE; 754 default: 755 return -EIO; 756 } 757 } 758 759 static void csk_act_open_retry_timer(unsigned long data) 760 { 761 struct sk_buff *skb = NULL; 762 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 763 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 764 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 765 struct l2t_entry *); 766 int t4 = is_t4(lldi->adapter_type), size, size6; 767 768 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 769 "csk 0x%p,%u,0x%lx,%u.\n", 770 csk, csk->state, csk->flags, csk->tid); 771 772 cxgbi_sock_get(csk); 773 spin_lock_bh(&csk->lock); 774 775 if (t4) { 776 size = sizeof(struct cpl_act_open_req); 777 size6 = sizeof(struct cpl_act_open_req6); 778 } else { 779 size = sizeof(struct cpl_t5_act_open_req); 780 size6 = sizeof(struct cpl_t5_act_open_req6); 781 } 782 783 if (csk->csk_family == AF_INET) { 784 send_act_open_func = send_act_open_req; 785 skb = alloc_wr(size, 0, GFP_ATOMIC); 786 #if IS_ENABLED(CONFIG_IPV6) 787 } else { 788 send_act_open_func = send_act_open_req6; 789 skb = alloc_wr(size6, 0, GFP_ATOMIC); 790 #endif 791 } 792 793 if (!skb) 794 cxgbi_sock_fail_act_open(csk, -ENOMEM); 795 else { 796 skb->sk = (struct sock *)csk; 797 t4_set_arp_err_handler(skb, csk, 798 cxgbi_sock_act_open_req_arp_failure); 799 send_act_open_func(csk, skb, csk->l2t); 800 } 801 802 spin_unlock_bh(&csk->lock); 803 cxgbi_sock_put(csk); 804 805 } 806 807 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 808 { 809 struct cxgbi_sock *csk; 810 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 811 unsigned int tid = GET_TID(rpl); 812 unsigned int atid = 813 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); 814 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status)); 815 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 816 struct tid_info *t = lldi->tids; 817 818 csk = lookup_atid(t, atid); 819 if (unlikely(!csk)) { 820 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 821 goto rel_skb; 822 } 823 824 pr_info_ipaddr("tid %u/%u, status %u.\n" 825 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 826 atid, tid, status, csk, csk->state, csk->flags); 827 828 if (status == CPL_ERR_RTX_NEG_ADVICE) 829 goto rel_skb; 830 831 if (status && status != CPL_ERR_TCAM_FULL && 832 status != CPL_ERR_CONN_EXIST && 833 status != CPL_ERR_ARP_MISS) 834 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 835 836 cxgbi_sock_get(csk); 837 spin_lock_bh(&csk->lock); 838 839 if (status == CPL_ERR_CONN_EXIST && 840 csk->retry_timer.function != csk_act_open_retry_timer) { 841 csk->retry_timer.function = csk_act_open_retry_timer; 842 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 843 } else 844 cxgbi_sock_fail_act_open(csk, 845 act_open_rpl_status_to_errno(status)); 846 847 spin_unlock_bh(&csk->lock); 848 cxgbi_sock_put(csk); 849 rel_skb: 850 __kfree_skb(skb); 851 } 852 853 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 854 { 855 struct cxgbi_sock *csk; 856 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 857 unsigned int tid = GET_TID(req); 858 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 859 struct tid_info *t = lldi->tids; 860 861 csk = lookup_tid(t, tid); 862 if (unlikely(!csk)) { 863 pr_err("can't find connection for tid %u.\n", tid); 864 goto rel_skb; 865 } 866 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 867 (&csk->saddr), (&csk->daddr), 868 csk, csk->state, csk->flags, csk->tid); 869 cxgbi_sock_rcv_peer_close(csk); 870 rel_skb: 871 __kfree_skb(skb); 872 } 873 874 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 875 { 876 struct cxgbi_sock *csk; 877 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 878 unsigned int tid = GET_TID(rpl); 879 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 880 struct tid_info *t = lldi->tids; 881 882 csk = lookup_tid(t, tid); 883 if (unlikely(!csk)) { 884 pr_err("can't find connection for tid %u.\n", tid); 885 goto rel_skb; 886 } 887 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 888 (&csk->saddr), (&csk->daddr), 889 csk, csk->state, csk->flags, csk->tid); 890 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 891 rel_skb: 892 __kfree_skb(skb); 893 } 894 895 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 896 int *need_rst) 897 { 898 switch (abort_reason) { 899 case CPL_ERR_BAD_SYN: /* fall through */ 900 case CPL_ERR_CONN_RESET: 901 return csk->state > CTP_ESTABLISHED ? 902 -EPIPE : -ECONNRESET; 903 case CPL_ERR_XMIT_TIMEDOUT: 904 case CPL_ERR_PERSIST_TIMEDOUT: 905 case CPL_ERR_FINWAIT2_TIMEDOUT: 906 case CPL_ERR_KEEPALIVE_TIMEDOUT: 907 return -ETIMEDOUT; 908 default: 909 return -EIO; 910 } 911 } 912 913 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 914 { 915 struct cxgbi_sock *csk; 916 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 917 unsigned int tid = GET_TID(req); 918 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 919 struct tid_info *t = lldi->tids; 920 int rst_status = CPL_ABORT_NO_RST; 921 922 csk = lookup_tid(t, tid); 923 if (unlikely(!csk)) { 924 pr_err("can't find connection for tid %u.\n", tid); 925 goto rel_skb; 926 } 927 928 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 929 (&csk->saddr), (&csk->daddr), 930 csk, csk->state, csk->flags, csk->tid, req->status); 931 932 if (req->status == CPL_ERR_RTX_NEG_ADVICE || 933 req->status == CPL_ERR_PERSIST_NEG_ADVICE) 934 goto rel_skb; 935 936 cxgbi_sock_get(csk); 937 spin_lock_bh(&csk->lock); 938 939 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { 940 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 941 cxgbi_sock_set_state(csk, CTP_ABORTING); 942 goto done; 943 } 944 945 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 946 send_abort_rpl(csk, rst_status); 947 948 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 949 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 950 cxgbi_sock_closed(csk); 951 } 952 done: 953 spin_unlock_bh(&csk->lock); 954 cxgbi_sock_put(csk); 955 rel_skb: 956 __kfree_skb(skb); 957 } 958 959 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 960 { 961 struct cxgbi_sock *csk; 962 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 963 unsigned int tid = GET_TID(rpl); 964 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 965 struct tid_info *t = lldi->tids; 966 967 csk = lookup_tid(t, tid); 968 if (!csk) 969 goto rel_skb; 970 971 if (csk) 972 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 973 (&csk->saddr), (&csk->daddr), csk, 974 csk->state, csk->flags, csk->tid, rpl->status); 975 976 if (rpl->status == CPL_ERR_ABORT_FAILED) 977 goto rel_skb; 978 979 cxgbi_sock_rcv_abort_rpl(csk); 980 rel_skb: 981 __kfree_skb(skb); 982 } 983 984 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 985 { 986 struct cxgbi_sock *csk; 987 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 988 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 989 unsigned int tid = GET_TID(cpl); 990 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 991 struct tid_info *t = lldi->tids; 992 993 csk = lookup_tid(t, tid); 994 if (unlikely(!csk)) { 995 pr_err("can't find conn. for tid %u.\n", tid); 996 goto rel_skb; 997 } 998 999 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1000 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1001 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1002 pdu_len_ddp); 1003 1004 spin_lock_bh(&csk->lock); 1005 1006 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1007 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1008 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1009 csk, csk->state, csk->flags, csk->tid); 1010 if (csk->state != CTP_ABORTING) 1011 goto abort_conn; 1012 else 1013 goto discard; 1014 } 1015 1016 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1017 cxgbi_skcb_flags(skb) = 0; 1018 1019 skb_reset_transport_header(skb); 1020 __skb_pull(skb, sizeof(*cpl)); 1021 __pskb_trim(skb, ntohs(cpl->len)); 1022 1023 if (!csk->skb_ulp_lhdr) { 1024 unsigned char *bhs; 1025 unsigned int hlen, dlen, plen; 1026 1027 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1028 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1029 csk, csk->state, csk->flags, csk->tid, skb); 1030 csk->skb_ulp_lhdr = skb; 1031 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1032 1033 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1034 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1035 csk->tid, cxgbi_skcb_tcp_seq(skb), 1036 csk->rcv_nxt); 1037 goto abort_conn; 1038 } 1039 1040 bhs = skb->data; 1041 hlen = ntohs(cpl->len); 1042 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1043 1044 plen = ISCSI_PDU_LEN(pdu_len_ddp); 1045 if (is_t4(lldi->adapter_type)) 1046 plen -= 40; 1047 1048 if ((hlen + dlen) != plen) { 1049 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1050 "mismatch %u != %u + %u, seq 0x%x.\n", 1051 csk->tid, plen, hlen, dlen, 1052 cxgbi_skcb_tcp_seq(skb)); 1053 goto abort_conn; 1054 } 1055 1056 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1057 if (dlen) 1058 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1059 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1060 1061 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1062 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1063 csk, skb, *bhs, hlen, dlen, 1064 ntohl(*((unsigned int *)(bhs + 16))), 1065 ntohl(*((unsigned int *)(bhs + 24)))); 1066 1067 } else { 1068 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1069 1070 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1071 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1072 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1073 csk, csk->state, csk->flags, skb, lskb); 1074 } 1075 1076 __skb_queue_tail(&csk->receive_queue, skb); 1077 spin_unlock_bh(&csk->lock); 1078 return; 1079 1080 abort_conn: 1081 send_abort_req(csk); 1082 discard: 1083 spin_unlock_bh(&csk->lock); 1084 rel_skb: 1085 __kfree_skb(skb); 1086 } 1087 1088 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1089 struct sk_buff *skb) 1090 { 1091 struct cxgbi_sock *csk; 1092 struct sk_buff *lskb; 1093 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1094 unsigned int tid = GET_TID(rpl); 1095 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1096 struct tid_info *t = lldi->tids; 1097 unsigned int status = ntohl(rpl->ddpvld); 1098 1099 csk = lookup_tid(t, tid); 1100 if (unlikely(!csk)) { 1101 pr_err("can't find connection for tid %u.\n", tid); 1102 goto rel_skb; 1103 } 1104 1105 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1106 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1107 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1108 1109 spin_lock_bh(&csk->lock); 1110 1111 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1112 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1113 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1114 csk, csk->state, csk->flags, csk->tid); 1115 if (csk->state != CTP_ABORTING) 1116 goto abort_conn; 1117 else 1118 goto discard; 1119 } 1120 1121 if (!csk->skb_ulp_lhdr) { 1122 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1123 goto abort_conn; 1124 } 1125 1126 lskb = csk->skb_ulp_lhdr; 1127 csk->skb_ulp_lhdr = NULL; 1128 1129 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1130 1131 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1132 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1133 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1134 1135 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1136 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1137 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1138 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1139 } 1140 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1141 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1142 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1143 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1144 } 1145 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1146 log_debug(1 << CXGBI_DBG_PDU_RX, 1147 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1148 csk, lskb, status); 1149 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1150 } 1151 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1152 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1153 log_debug(1 << CXGBI_DBG_PDU_RX, 1154 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1155 csk, lskb, status); 1156 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1157 } 1158 log_debug(1 << CXGBI_DBG_PDU_RX, 1159 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1160 csk, lskb, cxgbi_skcb_flags(lskb)); 1161 1162 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1163 cxgbi_conn_pdu_ready(csk); 1164 spin_unlock_bh(&csk->lock); 1165 goto rel_skb; 1166 1167 abort_conn: 1168 send_abort_req(csk); 1169 discard: 1170 spin_unlock_bh(&csk->lock); 1171 rel_skb: 1172 __kfree_skb(skb); 1173 } 1174 1175 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1176 { 1177 struct cxgbi_sock *csk; 1178 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1179 unsigned int tid = GET_TID(rpl); 1180 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1181 struct tid_info *t = lldi->tids; 1182 1183 csk = lookup_tid(t, tid); 1184 if (unlikely(!csk)) 1185 pr_err("can't find connection for tid %u.\n", tid); 1186 else { 1187 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1188 "csk 0x%p,%u,0x%lx,%u.\n", 1189 csk, csk->state, csk->flags, csk->tid); 1190 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1191 rpl->seq_vld); 1192 } 1193 __kfree_skb(skb); 1194 } 1195 1196 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1197 { 1198 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1199 unsigned int tid = GET_TID(rpl); 1200 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1201 struct tid_info *t = lldi->tids; 1202 struct cxgbi_sock *csk; 1203 1204 csk = lookup_tid(t, tid); 1205 if (!csk) 1206 pr_err("can't find conn. for tid %u.\n", tid); 1207 1208 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1209 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1210 csk, csk->state, csk->flags, csk->tid, rpl->status); 1211 1212 if (rpl->status != CPL_ERR_NONE) 1213 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1214 csk, tid, rpl->status); 1215 1216 __kfree_skb(skb); 1217 } 1218 1219 static int alloc_cpls(struct cxgbi_sock *csk) 1220 { 1221 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1222 0, GFP_KERNEL); 1223 if (!csk->cpl_close) 1224 return -ENOMEM; 1225 1226 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1227 0, GFP_KERNEL); 1228 if (!csk->cpl_abort_req) 1229 goto free_cpls; 1230 1231 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1232 0, GFP_KERNEL); 1233 if (!csk->cpl_abort_rpl) 1234 goto free_cpls; 1235 return 0; 1236 1237 free_cpls: 1238 cxgbi_sock_free_cpl_skbs(csk); 1239 return -ENOMEM; 1240 } 1241 1242 static inline void l2t_put(struct cxgbi_sock *csk) 1243 { 1244 if (csk->l2t) { 1245 cxgb4_l2t_release(csk->l2t); 1246 csk->l2t = NULL; 1247 cxgbi_sock_put(csk); 1248 } 1249 } 1250 1251 static void release_offload_resources(struct cxgbi_sock *csk) 1252 { 1253 struct cxgb4_lld_info *lldi; 1254 1255 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1256 "csk 0x%p,%u,0x%lx,%u.\n", 1257 csk, csk->state, csk->flags, csk->tid); 1258 1259 cxgbi_sock_free_cpl_skbs(csk); 1260 if (csk->wr_cred != csk->wr_max_cred) { 1261 cxgbi_sock_purge_wr_queue(csk); 1262 cxgbi_sock_reset_wr_list(csk); 1263 } 1264 1265 l2t_put(csk); 1266 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1267 free_atid(csk); 1268 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1269 lldi = cxgbi_cdev_priv(csk->cdev); 1270 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1271 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1272 cxgbi_sock_put(csk); 1273 } 1274 csk->dst = NULL; 1275 csk->cdev = NULL; 1276 } 1277 1278 static int init_act_open(struct cxgbi_sock *csk) 1279 { 1280 struct cxgbi_device *cdev = csk->cdev; 1281 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1282 struct net_device *ndev = cdev->ports[csk->port_id]; 1283 struct sk_buff *skb = NULL; 1284 struct neighbour *n = NULL; 1285 void *daddr; 1286 unsigned int step; 1287 unsigned int size, size6; 1288 int t4 = is_t4(lldi->adapter_type); 1289 1290 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1291 "csk 0x%p,%u,0x%lx,%u.\n", 1292 csk, csk->state, csk->flags, csk->tid); 1293 1294 if (csk->csk_family == AF_INET) 1295 daddr = &csk->daddr.sin_addr.s_addr; 1296 #if IS_ENABLED(CONFIG_IPV6) 1297 else if (csk->csk_family == AF_INET6) 1298 daddr = &csk->daddr6.sin6_addr; 1299 #endif 1300 else { 1301 pr_err("address family 0x%x not supported\n", csk->csk_family); 1302 goto rel_resource; 1303 } 1304 1305 n = dst_neigh_lookup(csk->dst, daddr); 1306 1307 if (!n) { 1308 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1309 goto rel_resource; 1310 } 1311 1312 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1313 if (csk->atid < 0) { 1314 pr_err("%s, NO atid available.\n", ndev->name); 1315 return -EINVAL; 1316 } 1317 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1318 cxgbi_sock_get(csk); 1319 1320 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1321 if (!csk->l2t) { 1322 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1323 goto rel_resource; 1324 } 1325 cxgbi_sock_get(csk); 1326 1327 if (t4) { 1328 size = sizeof(struct cpl_act_open_req); 1329 size6 = sizeof(struct cpl_act_open_req6); 1330 } else { 1331 size = sizeof(struct cpl_t5_act_open_req); 1332 size6 = sizeof(struct cpl_t5_act_open_req6); 1333 } 1334 1335 if (csk->csk_family == AF_INET) 1336 skb = alloc_wr(size, 0, GFP_NOIO); 1337 #if IS_ENABLED(CONFIG_IPV6) 1338 else 1339 skb = alloc_wr(size6, 0, GFP_NOIO); 1340 #endif 1341 1342 if (!skb) 1343 goto rel_resource; 1344 skb->sk = (struct sock *)csk; 1345 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1346 1347 if (!csk->mtu) 1348 csk->mtu = dst_mtu(csk->dst); 1349 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1350 csk->tx_chan = cxgb4_port_chan(ndev); 1351 /* SMT two entries per row */ 1352 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1353 step = lldi->ntxq / lldi->nchan; 1354 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1355 step = lldi->nrxq / lldi->nchan; 1356 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1357 csk->wr_cred = lldi->wr_cred - 1358 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1359 csk->wr_max_cred = csk->wr_cred; 1360 csk->wr_una_cred = 0; 1361 cxgbi_sock_reset_wr_list(csk); 1362 csk->err = 0; 1363 1364 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1365 (&csk->saddr), (&csk->daddr), csk, csk->state, 1366 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1367 csk->mtu, csk->mss_idx, csk->smac_idx); 1368 1369 /* must wait for either a act_open_rpl or act_open_establish */ 1370 try_module_get(THIS_MODULE); 1371 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1372 if (csk->csk_family == AF_INET) 1373 send_act_open_req(csk, skb, csk->l2t); 1374 #if IS_ENABLED(CONFIG_IPV6) 1375 else 1376 send_act_open_req6(csk, skb, csk->l2t); 1377 #endif 1378 neigh_release(n); 1379 1380 return 0; 1381 1382 rel_resource: 1383 if (n) 1384 neigh_release(n); 1385 if (skb) 1386 __kfree_skb(skb); 1387 return -EINVAL; 1388 } 1389 1390 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1391 [CPL_ACT_ESTABLISH] = do_act_establish, 1392 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1393 [CPL_PEER_CLOSE] = do_peer_close, 1394 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1395 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1396 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1397 [CPL_FW4_ACK] = do_fw4_ack, 1398 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1399 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1400 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1401 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1402 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1403 }; 1404 1405 int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1406 { 1407 int rc; 1408 1409 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1410 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1411 1412 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1413 cxgb4i_max_connect); 1414 if (rc < 0) 1415 return rc; 1416 1417 cdev->csk_release_offload_resources = release_offload_resources; 1418 cdev->csk_push_tx_frames = push_tx_frames; 1419 cdev->csk_send_abort_req = send_abort_req; 1420 cdev->csk_send_close_req = send_close_req; 1421 cdev->csk_send_rx_credits = send_rx_credits; 1422 cdev->csk_alloc_cpls = alloc_cpls; 1423 cdev->csk_init_act_open = init_act_open; 1424 1425 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1426 return 0; 1427 } 1428 1429 /* 1430 * functions to program the pagepod in h/w 1431 */ 1432 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 1433 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi, 1434 struct ulp_mem_io *req, 1435 unsigned int wr_len, unsigned int dlen, 1436 unsigned int pm_addr) 1437 { 1438 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1439 1440 INIT_ULPTX_WR(req, wr_len, 0, 0); 1441 if (is_t4(lldi->adapter_type)) 1442 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | 1443 (ULP_MEMIO_ORDER(1))); 1444 else 1445 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | 1446 (V_T5_ULP_MEMIO_IMM(1))); 1447 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); 1448 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); 1449 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1450 1451 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM)); 1452 idata->len = htonl(dlen); 1453 } 1454 1455 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, 1456 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1457 unsigned int npods, 1458 struct cxgbi_gather_list *gl, 1459 unsigned int gl_pidx) 1460 { 1461 struct cxgbi_ddp_info *ddp = cdev->ddp; 1462 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1463 struct sk_buff *skb; 1464 struct ulp_mem_io *req; 1465 struct ulptx_idata *idata; 1466 struct cxgbi_pagepod *ppod; 1467 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; 1468 unsigned int dlen = PPOD_SIZE * npods; 1469 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1470 sizeof(struct ulptx_idata) + dlen, 16); 1471 unsigned int i; 1472 1473 skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1474 if (!skb) { 1475 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1476 cdev, idx, npods); 1477 return -ENOMEM; 1478 } 1479 req = (struct ulp_mem_io *)skb->head; 1480 set_queue(skb, CPL_PRIORITY_CONTROL, NULL); 1481 1482 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr); 1483 idata = (struct ulptx_idata *)(req + 1); 1484 ppod = (struct cxgbi_pagepod *)(idata + 1); 1485 1486 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1487 if (!hdr && !gl) 1488 cxgbi_ddp_ppod_clear(ppod); 1489 else 1490 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1491 } 1492 1493 cxgb4_ofld_send(cdev->ports[port_id], skb); 1494 return 0; 1495 } 1496 1497 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1498 unsigned int idx, unsigned int npods, 1499 struct cxgbi_gather_list *gl) 1500 { 1501 unsigned int i, cnt; 1502 int err = 0; 1503 1504 for (i = 0; i < npods; i += cnt, idx += cnt) { 1505 cnt = npods - i; 1506 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1507 cnt = ULPMEM_IDATA_MAX_NPPODS; 1508 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, 1509 idx, cnt, gl, 4 * i); 1510 if (err < 0) 1511 break; 1512 } 1513 return err; 1514 } 1515 1516 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1517 unsigned int idx, unsigned int npods) 1518 { 1519 unsigned int i, cnt; 1520 int err; 1521 1522 for (i = 0; i < npods; i += cnt, idx += cnt) { 1523 cnt = npods - i; 1524 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1525 cnt = ULPMEM_IDATA_MAX_NPPODS; 1526 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, 1527 idx, cnt, NULL, 0); 1528 if (err < 0) 1529 break; 1530 } 1531 } 1532 1533 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1534 int pg_idx, bool reply) 1535 { 1536 struct sk_buff *skb; 1537 struct cpl_set_tcb_field *req; 1538 1539 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1540 return 0; 1541 1542 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1543 if (!skb) 1544 return -ENOMEM; 1545 1546 /* set up ulp page size */ 1547 req = (struct cpl_set_tcb_field *)skb->head; 1548 INIT_TP_WR(req, csk->tid); 1549 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1550 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1551 req->word_cookie = htons(0); 1552 req->mask = cpu_to_be64(0x3 << 8); 1553 req->val = cpu_to_be64(pg_idx << 8); 1554 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1555 1556 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1557 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1558 1559 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1560 return 0; 1561 } 1562 1563 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1564 int hcrc, int dcrc, int reply) 1565 { 1566 struct sk_buff *skb; 1567 struct cpl_set_tcb_field *req; 1568 1569 if (!hcrc && !dcrc) 1570 return 0; 1571 1572 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1573 if (!skb) 1574 return -ENOMEM; 1575 1576 csk->hcrc_len = (hcrc ? 4 : 0); 1577 csk->dcrc_len = (dcrc ? 4 : 0); 1578 /* set up ulp submode */ 1579 req = (struct cpl_set_tcb_field *)skb->head; 1580 INIT_TP_WR(req, tid); 1581 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1582 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1583 req->word_cookie = htons(0); 1584 req->mask = cpu_to_be64(0x3 << 4); 1585 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1586 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1587 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1588 1589 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1590 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1591 1592 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1593 return 0; 1594 } 1595 1596 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1597 { 1598 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1599 struct cxgbi_ddp_info *ddp = cdev->ddp; 1600 unsigned int tagmask, pgsz_factor[4]; 1601 int err; 1602 1603 if (ddp) { 1604 kref_get(&ddp->refcnt); 1605 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1606 cdev, cdev->ddp); 1607 return -EALREADY; 1608 } 1609 1610 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1611 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1612 lldi->iscsi_iolen, lldi->iscsi_iolen); 1613 if (err < 0) 1614 return err; 1615 1616 ddp = cdev->ddp; 1617 1618 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1619 cxgbi_ddp_page_size_factor(pgsz_factor); 1620 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1621 1622 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1623 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1624 cdev->csk_ddp_set = ddp_set_map; 1625 cdev->csk_ddp_clear = ddp_clear_map; 1626 1627 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1628 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1629 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1630 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1631 " %u/%u.\n", 1632 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1633 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1634 ddp->max_rxsz, lldi->iscsi_iolen); 1635 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1636 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1637 ddp->max_rxsz); 1638 return 0; 1639 } 1640 1641 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1642 { 1643 struct cxgbi_device *cdev; 1644 struct port_info *pi; 1645 int i, rc; 1646 1647 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1648 if (!cdev) { 1649 pr_info("t4 device 0x%p, register failed.\n", lldi); 1650 return NULL; 1651 } 1652 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1653 cdev, lldi->adapter_type, lldi->nports, 1654 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1655 lldi->nrxq, lldi->wr_cred); 1656 for (i = 0; i < lldi->nrxq; i++) 1657 log_debug(1 << CXGBI_DBG_DEV, 1658 "t4 0x%p, rxq id #%d: %u.\n", 1659 cdev, i, lldi->rxq_ids[i]); 1660 1661 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1662 cdev->flags = CXGBI_FLAG_DEV_T4; 1663 cdev->pdev = lldi->pdev; 1664 cdev->ports = lldi->ports; 1665 cdev->nports = lldi->nports; 1666 cdev->mtus = lldi->mtus; 1667 cdev->nmtus = NMTUS; 1668 cdev->snd_win = cxgb4i_snd_win; 1669 cdev->rcv_win = cxgb4i_rcv_win; 1670 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1671 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1672 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1673 cdev->itp = &cxgb4i_iscsi_transport; 1674 1675 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8; 1676 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1677 cdev, lldi->ports[0]->name, cdev->pfvf); 1678 1679 rc = cxgb4i_ddp_init(cdev); 1680 if (rc) { 1681 pr_info("t4 0x%p ddp init failed.\n", cdev); 1682 goto err_out; 1683 } 1684 rc = cxgb4i_ofld_init(cdev); 1685 if (rc) { 1686 pr_info("t4 0x%p ofld init failed.\n", cdev); 1687 goto err_out; 1688 } 1689 1690 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1691 &cxgb4i_host_template, cxgb4i_stt); 1692 if (rc) 1693 goto err_out; 1694 1695 for (i = 0; i < cdev->nports; i++) { 1696 pi = netdev_priv(lldi->ports[i]); 1697 cdev->hbas[i]->port_id = pi->port_id; 1698 } 1699 return cdev; 1700 1701 err_out: 1702 cxgbi_device_unregister(cdev); 1703 return ERR_PTR(-ENOMEM); 1704 } 1705 1706 #define RX_PULL_LEN 128 1707 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1708 const struct pkt_gl *pgl) 1709 { 1710 const struct cpl_act_establish *rpl; 1711 struct sk_buff *skb; 1712 unsigned int opc; 1713 struct cxgbi_device *cdev = handle; 1714 1715 if (pgl == NULL) { 1716 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1717 1718 skb = alloc_wr(len, 0, GFP_ATOMIC); 1719 if (!skb) 1720 goto nomem; 1721 skb_copy_to_linear_data(skb, &rsp[1], len); 1722 } else { 1723 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1724 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1725 pgl->va, be64_to_cpu(*rsp), 1726 be64_to_cpu(*(u64 *)pgl->va), 1727 pgl->tot_len); 1728 return 0; 1729 } 1730 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1731 if (unlikely(!skb)) 1732 goto nomem; 1733 } 1734 1735 rpl = (struct cpl_act_establish *)skb->data; 1736 opc = rpl->ot.opcode; 1737 log_debug(1 << CXGBI_DBG_TOE, 1738 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1739 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1740 if (cxgb4i_cplhandlers[opc]) 1741 cxgb4i_cplhandlers[opc](cdev, skb); 1742 else { 1743 pr_err("No handler for opcode 0x%x.\n", opc); 1744 __kfree_skb(skb); 1745 } 1746 return 0; 1747 nomem: 1748 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1749 return 1; 1750 } 1751 1752 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1753 { 1754 struct cxgbi_device *cdev = handle; 1755 1756 switch (state) { 1757 case CXGB4_STATE_UP: 1758 pr_info("cdev 0x%p, UP.\n", cdev); 1759 break; 1760 case CXGB4_STATE_START_RECOVERY: 1761 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1762 /* close all connections */ 1763 break; 1764 case CXGB4_STATE_DOWN: 1765 pr_info("cdev 0x%p, DOWN.\n", cdev); 1766 break; 1767 case CXGB4_STATE_DETACH: 1768 pr_info("cdev 0x%p, DETACH.\n", cdev); 1769 cxgbi_device_unregister(cdev); 1770 break; 1771 default: 1772 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1773 break; 1774 } 1775 return 0; 1776 } 1777 1778 static int __init cxgb4i_init_module(void) 1779 { 1780 int rc; 1781 1782 printk(KERN_INFO "%s", version); 1783 1784 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1785 if (rc < 0) 1786 return rc; 1787 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1788 1789 return 0; 1790 } 1791 1792 static void __exit cxgb4i_exit_module(void) 1793 { 1794 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1795 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1796 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1797 } 1798 1799 module_init(cxgb4i_init_module); 1800 module_exit(cxgb4i_exit_module); 1801