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 module_put(THIS_MODULE); 832 833 if (status && status != CPL_ERR_TCAM_FULL && 834 status != CPL_ERR_CONN_EXIST && 835 status != CPL_ERR_ARP_MISS) 836 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 837 838 cxgbi_sock_get(csk); 839 spin_lock_bh(&csk->lock); 840 841 if (status == CPL_ERR_CONN_EXIST && 842 csk->retry_timer.function != csk_act_open_retry_timer) { 843 csk->retry_timer.function = csk_act_open_retry_timer; 844 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 845 } else 846 cxgbi_sock_fail_act_open(csk, 847 act_open_rpl_status_to_errno(status)); 848 849 spin_unlock_bh(&csk->lock); 850 cxgbi_sock_put(csk); 851 rel_skb: 852 __kfree_skb(skb); 853 } 854 855 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 856 { 857 struct cxgbi_sock *csk; 858 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 859 unsigned int tid = GET_TID(req); 860 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 861 struct tid_info *t = lldi->tids; 862 863 csk = lookup_tid(t, tid); 864 if (unlikely(!csk)) { 865 pr_err("can't find connection for tid %u.\n", tid); 866 goto rel_skb; 867 } 868 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 869 (&csk->saddr), (&csk->daddr), 870 csk, csk->state, csk->flags, csk->tid); 871 cxgbi_sock_rcv_peer_close(csk); 872 rel_skb: 873 __kfree_skb(skb); 874 } 875 876 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 877 { 878 struct cxgbi_sock *csk; 879 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 880 unsigned int tid = GET_TID(rpl); 881 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 882 struct tid_info *t = lldi->tids; 883 884 csk = lookup_tid(t, tid); 885 if (unlikely(!csk)) { 886 pr_err("can't find connection for tid %u.\n", tid); 887 goto rel_skb; 888 } 889 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 890 (&csk->saddr), (&csk->daddr), 891 csk, csk->state, csk->flags, csk->tid); 892 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 893 rel_skb: 894 __kfree_skb(skb); 895 } 896 897 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 898 int *need_rst) 899 { 900 switch (abort_reason) { 901 case CPL_ERR_BAD_SYN: /* fall through */ 902 case CPL_ERR_CONN_RESET: 903 return csk->state > CTP_ESTABLISHED ? 904 -EPIPE : -ECONNRESET; 905 case CPL_ERR_XMIT_TIMEDOUT: 906 case CPL_ERR_PERSIST_TIMEDOUT: 907 case CPL_ERR_FINWAIT2_TIMEDOUT: 908 case CPL_ERR_KEEPALIVE_TIMEDOUT: 909 return -ETIMEDOUT; 910 default: 911 return -EIO; 912 } 913 } 914 915 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 916 { 917 struct cxgbi_sock *csk; 918 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 919 unsigned int tid = GET_TID(req); 920 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 921 struct tid_info *t = lldi->tids; 922 int rst_status = CPL_ABORT_NO_RST; 923 924 csk = lookup_tid(t, tid); 925 if (unlikely(!csk)) { 926 pr_err("can't find connection for tid %u.\n", tid); 927 goto rel_skb; 928 } 929 930 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 931 (&csk->saddr), (&csk->daddr), 932 csk, csk->state, csk->flags, csk->tid, req->status); 933 934 if (req->status == CPL_ERR_RTX_NEG_ADVICE || 935 req->status == CPL_ERR_PERSIST_NEG_ADVICE) 936 goto rel_skb; 937 938 cxgbi_sock_get(csk); 939 spin_lock_bh(&csk->lock); 940 941 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 942 943 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 944 send_tx_flowc_wr(csk); 945 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 946 } 947 948 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 949 cxgbi_sock_set_state(csk, CTP_ABORTING); 950 951 send_abort_rpl(csk, rst_status); 952 953 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 954 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 955 cxgbi_sock_closed(csk); 956 } 957 958 spin_unlock_bh(&csk->lock); 959 cxgbi_sock_put(csk); 960 rel_skb: 961 __kfree_skb(skb); 962 } 963 964 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 965 { 966 struct cxgbi_sock *csk; 967 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 968 unsigned int tid = GET_TID(rpl); 969 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 970 struct tid_info *t = lldi->tids; 971 972 csk = lookup_tid(t, tid); 973 if (!csk) 974 goto rel_skb; 975 976 if (csk) 977 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 978 (&csk->saddr), (&csk->daddr), csk, 979 csk->state, csk->flags, csk->tid, rpl->status); 980 981 if (rpl->status == CPL_ERR_ABORT_FAILED) 982 goto rel_skb; 983 984 cxgbi_sock_rcv_abort_rpl(csk); 985 rel_skb: 986 __kfree_skb(skb); 987 } 988 989 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 990 { 991 struct cxgbi_sock *csk; 992 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 993 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 994 unsigned int tid = GET_TID(cpl); 995 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 996 struct tid_info *t = lldi->tids; 997 998 csk = lookup_tid(t, tid); 999 if (unlikely(!csk)) { 1000 pr_err("can't find conn. for tid %u.\n", tid); 1001 goto rel_skb; 1002 } 1003 1004 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1005 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1006 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1007 pdu_len_ddp); 1008 1009 spin_lock_bh(&csk->lock); 1010 1011 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1012 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1013 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1014 csk, csk->state, csk->flags, csk->tid); 1015 if (csk->state != CTP_ABORTING) 1016 goto abort_conn; 1017 else 1018 goto discard; 1019 } 1020 1021 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1022 cxgbi_skcb_flags(skb) = 0; 1023 1024 skb_reset_transport_header(skb); 1025 __skb_pull(skb, sizeof(*cpl)); 1026 __pskb_trim(skb, ntohs(cpl->len)); 1027 1028 if (!csk->skb_ulp_lhdr) { 1029 unsigned char *bhs; 1030 unsigned int hlen, dlen, plen; 1031 1032 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1033 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1034 csk, csk->state, csk->flags, csk->tid, skb); 1035 csk->skb_ulp_lhdr = skb; 1036 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1037 1038 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1039 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1040 csk->tid, cxgbi_skcb_tcp_seq(skb), 1041 csk->rcv_nxt); 1042 goto abort_conn; 1043 } 1044 1045 bhs = skb->data; 1046 hlen = ntohs(cpl->len); 1047 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1048 1049 plen = ISCSI_PDU_LEN(pdu_len_ddp); 1050 if (is_t4(lldi->adapter_type)) 1051 plen -= 40; 1052 1053 if ((hlen + dlen) != plen) { 1054 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1055 "mismatch %u != %u + %u, seq 0x%x.\n", 1056 csk->tid, plen, hlen, dlen, 1057 cxgbi_skcb_tcp_seq(skb)); 1058 goto abort_conn; 1059 } 1060 1061 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1062 if (dlen) 1063 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1064 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1065 1066 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1067 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1068 csk, skb, *bhs, hlen, dlen, 1069 ntohl(*((unsigned int *)(bhs + 16))), 1070 ntohl(*((unsigned int *)(bhs + 24)))); 1071 1072 } else { 1073 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1074 1075 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1076 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1077 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1078 csk, csk->state, csk->flags, skb, lskb); 1079 } 1080 1081 __skb_queue_tail(&csk->receive_queue, skb); 1082 spin_unlock_bh(&csk->lock); 1083 return; 1084 1085 abort_conn: 1086 send_abort_req(csk); 1087 discard: 1088 spin_unlock_bh(&csk->lock); 1089 rel_skb: 1090 __kfree_skb(skb); 1091 } 1092 1093 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1094 struct sk_buff *skb) 1095 { 1096 struct cxgbi_sock *csk; 1097 struct sk_buff *lskb; 1098 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1099 unsigned int tid = GET_TID(rpl); 1100 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1101 struct tid_info *t = lldi->tids; 1102 unsigned int status = ntohl(rpl->ddpvld); 1103 1104 csk = lookup_tid(t, tid); 1105 if (unlikely(!csk)) { 1106 pr_err("can't find connection for tid %u.\n", tid); 1107 goto rel_skb; 1108 } 1109 1110 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1111 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1112 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1113 1114 spin_lock_bh(&csk->lock); 1115 1116 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1117 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1118 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1119 csk, csk->state, csk->flags, csk->tid); 1120 if (csk->state != CTP_ABORTING) 1121 goto abort_conn; 1122 else 1123 goto discard; 1124 } 1125 1126 if (!csk->skb_ulp_lhdr) { 1127 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1128 goto abort_conn; 1129 } 1130 1131 lskb = csk->skb_ulp_lhdr; 1132 csk->skb_ulp_lhdr = NULL; 1133 1134 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1135 1136 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1137 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1138 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1139 1140 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1141 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1142 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1143 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1144 } 1145 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1146 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1147 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1148 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1149 } 1150 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1151 log_debug(1 << CXGBI_DBG_PDU_RX, 1152 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1153 csk, lskb, status); 1154 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1155 } 1156 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1157 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1158 log_debug(1 << CXGBI_DBG_PDU_RX, 1159 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1160 csk, lskb, status); 1161 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1162 } 1163 log_debug(1 << CXGBI_DBG_PDU_RX, 1164 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1165 csk, lskb, cxgbi_skcb_flags(lskb)); 1166 1167 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1168 cxgbi_conn_pdu_ready(csk); 1169 spin_unlock_bh(&csk->lock); 1170 goto rel_skb; 1171 1172 abort_conn: 1173 send_abort_req(csk); 1174 discard: 1175 spin_unlock_bh(&csk->lock); 1176 rel_skb: 1177 __kfree_skb(skb); 1178 } 1179 1180 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1181 { 1182 struct cxgbi_sock *csk; 1183 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1184 unsigned int tid = GET_TID(rpl); 1185 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1186 struct tid_info *t = lldi->tids; 1187 1188 csk = lookup_tid(t, tid); 1189 if (unlikely(!csk)) 1190 pr_err("can't find connection for tid %u.\n", tid); 1191 else { 1192 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1193 "csk 0x%p,%u,0x%lx,%u.\n", 1194 csk, csk->state, csk->flags, csk->tid); 1195 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1196 rpl->seq_vld); 1197 } 1198 __kfree_skb(skb); 1199 } 1200 1201 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1202 { 1203 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1204 unsigned int tid = GET_TID(rpl); 1205 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1206 struct tid_info *t = lldi->tids; 1207 struct cxgbi_sock *csk; 1208 1209 csk = lookup_tid(t, tid); 1210 if (!csk) 1211 pr_err("can't find conn. for tid %u.\n", tid); 1212 1213 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1214 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1215 csk, csk->state, csk->flags, csk->tid, rpl->status); 1216 1217 if (rpl->status != CPL_ERR_NONE) 1218 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1219 csk, tid, rpl->status); 1220 1221 __kfree_skb(skb); 1222 } 1223 1224 static int alloc_cpls(struct cxgbi_sock *csk) 1225 { 1226 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1227 0, GFP_KERNEL); 1228 if (!csk->cpl_close) 1229 return -ENOMEM; 1230 1231 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1232 0, GFP_KERNEL); 1233 if (!csk->cpl_abort_req) 1234 goto free_cpls; 1235 1236 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1237 0, GFP_KERNEL); 1238 if (!csk->cpl_abort_rpl) 1239 goto free_cpls; 1240 return 0; 1241 1242 free_cpls: 1243 cxgbi_sock_free_cpl_skbs(csk); 1244 return -ENOMEM; 1245 } 1246 1247 static inline void l2t_put(struct cxgbi_sock *csk) 1248 { 1249 if (csk->l2t) { 1250 cxgb4_l2t_release(csk->l2t); 1251 csk->l2t = NULL; 1252 cxgbi_sock_put(csk); 1253 } 1254 } 1255 1256 static void release_offload_resources(struct cxgbi_sock *csk) 1257 { 1258 struct cxgb4_lld_info *lldi; 1259 1260 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1261 "csk 0x%p,%u,0x%lx,%u.\n", 1262 csk, csk->state, csk->flags, csk->tid); 1263 1264 cxgbi_sock_free_cpl_skbs(csk); 1265 if (csk->wr_cred != csk->wr_max_cred) { 1266 cxgbi_sock_purge_wr_queue(csk); 1267 cxgbi_sock_reset_wr_list(csk); 1268 } 1269 1270 l2t_put(csk); 1271 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1272 free_atid(csk); 1273 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1274 lldi = cxgbi_cdev_priv(csk->cdev); 1275 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1276 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1277 cxgbi_sock_put(csk); 1278 } 1279 csk->dst = NULL; 1280 csk->cdev = NULL; 1281 } 1282 1283 static int init_act_open(struct cxgbi_sock *csk) 1284 { 1285 struct cxgbi_device *cdev = csk->cdev; 1286 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1287 struct net_device *ndev = cdev->ports[csk->port_id]; 1288 struct sk_buff *skb = NULL; 1289 struct neighbour *n = NULL; 1290 void *daddr; 1291 unsigned int step; 1292 unsigned int size, size6; 1293 int t4 = is_t4(lldi->adapter_type); 1294 1295 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1296 "csk 0x%p,%u,0x%lx,%u.\n", 1297 csk, csk->state, csk->flags, csk->tid); 1298 1299 if (csk->csk_family == AF_INET) 1300 daddr = &csk->daddr.sin_addr.s_addr; 1301 #if IS_ENABLED(CONFIG_IPV6) 1302 else if (csk->csk_family == AF_INET6) 1303 daddr = &csk->daddr6.sin6_addr; 1304 #endif 1305 else { 1306 pr_err("address family 0x%x not supported\n", csk->csk_family); 1307 goto rel_resource; 1308 } 1309 1310 n = dst_neigh_lookup(csk->dst, daddr); 1311 1312 if (!n) { 1313 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1314 goto rel_resource; 1315 } 1316 1317 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1318 if (csk->atid < 0) { 1319 pr_err("%s, NO atid available.\n", ndev->name); 1320 return -EINVAL; 1321 } 1322 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1323 cxgbi_sock_get(csk); 1324 1325 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1326 if (!csk->l2t) { 1327 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1328 goto rel_resource; 1329 } 1330 cxgbi_sock_get(csk); 1331 1332 if (t4) { 1333 size = sizeof(struct cpl_act_open_req); 1334 size6 = sizeof(struct cpl_act_open_req6); 1335 } else { 1336 size = sizeof(struct cpl_t5_act_open_req); 1337 size6 = sizeof(struct cpl_t5_act_open_req6); 1338 } 1339 1340 if (csk->csk_family == AF_INET) 1341 skb = alloc_wr(size, 0, GFP_NOIO); 1342 #if IS_ENABLED(CONFIG_IPV6) 1343 else 1344 skb = alloc_wr(size6, 0, GFP_NOIO); 1345 #endif 1346 1347 if (!skb) 1348 goto rel_resource; 1349 skb->sk = (struct sock *)csk; 1350 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1351 1352 if (!csk->mtu) 1353 csk->mtu = dst_mtu(csk->dst); 1354 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1355 csk->tx_chan = cxgb4_port_chan(ndev); 1356 /* SMT two entries per row */ 1357 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1358 step = lldi->ntxq / lldi->nchan; 1359 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1360 step = lldi->nrxq / lldi->nchan; 1361 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1362 csk->wr_cred = lldi->wr_cred - 1363 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1364 csk->wr_max_cred = csk->wr_cred; 1365 csk->wr_una_cred = 0; 1366 cxgbi_sock_reset_wr_list(csk); 1367 csk->err = 0; 1368 1369 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1370 (&csk->saddr), (&csk->daddr), csk, csk->state, 1371 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1372 csk->mtu, csk->mss_idx, csk->smac_idx); 1373 1374 /* must wait for either a act_open_rpl or act_open_establish */ 1375 try_module_get(THIS_MODULE); 1376 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1377 if (csk->csk_family == AF_INET) 1378 send_act_open_req(csk, skb, csk->l2t); 1379 #if IS_ENABLED(CONFIG_IPV6) 1380 else 1381 send_act_open_req6(csk, skb, csk->l2t); 1382 #endif 1383 neigh_release(n); 1384 1385 return 0; 1386 1387 rel_resource: 1388 if (n) 1389 neigh_release(n); 1390 if (skb) 1391 __kfree_skb(skb); 1392 return -EINVAL; 1393 } 1394 1395 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1396 [CPL_ACT_ESTABLISH] = do_act_establish, 1397 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1398 [CPL_PEER_CLOSE] = do_peer_close, 1399 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1400 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1401 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1402 [CPL_FW4_ACK] = do_fw4_ack, 1403 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1404 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1405 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1406 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1407 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1408 }; 1409 1410 int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1411 { 1412 int rc; 1413 1414 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1415 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1416 1417 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1418 cxgb4i_max_connect); 1419 if (rc < 0) 1420 return rc; 1421 1422 cdev->csk_release_offload_resources = release_offload_resources; 1423 cdev->csk_push_tx_frames = push_tx_frames; 1424 cdev->csk_send_abort_req = send_abort_req; 1425 cdev->csk_send_close_req = send_close_req; 1426 cdev->csk_send_rx_credits = send_rx_credits; 1427 cdev->csk_alloc_cpls = alloc_cpls; 1428 cdev->csk_init_act_open = init_act_open; 1429 1430 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1431 return 0; 1432 } 1433 1434 /* 1435 * functions to program the pagepod in h/w 1436 */ 1437 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 1438 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi, 1439 struct ulp_mem_io *req, 1440 unsigned int wr_len, unsigned int dlen, 1441 unsigned int pm_addr) 1442 { 1443 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1444 1445 INIT_ULPTX_WR(req, wr_len, 0, 0); 1446 if (is_t4(lldi->adapter_type)) 1447 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | 1448 (ULP_MEMIO_ORDER(1))); 1449 else 1450 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | 1451 (V_T5_ULP_MEMIO_IMM(1))); 1452 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); 1453 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); 1454 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1455 1456 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM)); 1457 idata->len = htonl(dlen); 1458 } 1459 1460 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, 1461 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1462 unsigned int npods, 1463 struct cxgbi_gather_list *gl, 1464 unsigned int gl_pidx) 1465 { 1466 struct cxgbi_ddp_info *ddp = cdev->ddp; 1467 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1468 struct sk_buff *skb; 1469 struct ulp_mem_io *req; 1470 struct ulptx_idata *idata; 1471 struct cxgbi_pagepod *ppod; 1472 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; 1473 unsigned int dlen = PPOD_SIZE * npods; 1474 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1475 sizeof(struct ulptx_idata) + dlen, 16); 1476 unsigned int i; 1477 1478 skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1479 if (!skb) { 1480 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1481 cdev, idx, npods); 1482 return -ENOMEM; 1483 } 1484 req = (struct ulp_mem_io *)skb->head; 1485 set_queue(skb, CPL_PRIORITY_CONTROL, NULL); 1486 1487 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr); 1488 idata = (struct ulptx_idata *)(req + 1); 1489 ppod = (struct cxgbi_pagepod *)(idata + 1); 1490 1491 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1492 if (!hdr && !gl) 1493 cxgbi_ddp_ppod_clear(ppod); 1494 else 1495 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1496 } 1497 1498 cxgb4_ofld_send(cdev->ports[port_id], skb); 1499 return 0; 1500 } 1501 1502 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1503 unsigned int idx, unsigned int npods, 1504 struct cxgbi_gather_list *gl) 1505 { 1506 unsigned int i, cnt; 1507 int err = 0; 1508 1509 for (i = 0; i < npods; i += cnt, idx += cnt) { 1510 cnt = npods - i; 1511 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1512 cnt = ULPMEM_IDATA_MAX_NPPODS; 1513 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, 1514 idx, cnt, gl, 4 * i); 1515 if (err < 0) 1516 break; 1517 } 1518 return err; 1519 } 1520 1521 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1522 unsigned int idx, unsigned int npods) 1523 { 1524 unsigned int i, cnt; 1525 int err; 1526 1527 for (i = 0; i < npods; i += cnt, idx += cnt) { 1528 cnt = npods - i; 1529 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1530 cnt = ULPMEM_IDATA_MAX_NPPODS; 1531 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, 1532 idx, cnt, NULL, 0); 1533 if (err < 0) 1534 break; 1535 } 1536 } 1537 1538 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1539 int pg_idx, bool reply) 1540 { 1541 struct sk_buff *skb; 1542 struct cpl_set_tcb_field *req; 1543 1544 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1545 return 0; 1546 1547 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1548 if (!skb) 1549 return -ENOMEM; 1550 1551 /* set up ulp page size */ 1552 req = (struct cpl_set_tcb_field *)skb->head; 1553 INIT_TP_WR(req, csk->tid); 1554 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1555 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1556 req->word_cookie = htons(0); 1557 req->mask = cpu_to_be64(0x3 << 8); 1558 req->val = cpu_to_be64(pg_idx << 8); 1559 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1560 1561 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1562 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1563 1564 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1565 return 0; 1566 } 1567 1568 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1569 int hcrc, int dcrc, int reply) 1570 { 1571 struct sk_buff *skb; 1572 struct cpl_set_tcb_field *req; 1573 1574 if (!hcrc && !dcrc) 1575 return 0; 1576 1577 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1578 if (!skb) 1579 return -ENOMEM; 1580 1581 csk->hcrc_len = (hcrc ? 4 : 0); 1582 csk->dcrc_len = (dcrc ? 4 : 0); 1583 /* set up ulp submode */ 1584 req = (struct cpl_set_tcb_field *)skb->head; 1585 INIT_TP_WR(req, tid); 1586 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1587 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1588 req->word_cookie = htons(0); 1589 req->mask = cpu_to_be64(0x3 << 4); 1590 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1591 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1592 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1593 1594 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1595 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1596 1597 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1598 return 0; 1599 } 1600 1601 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1602 { 1603 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1604 struct cxgbi_ddp_info *ddp = cdev->ddp; 1605 unsigned int tagmask, pgsz_factor[4]; 1606 int err; 1607 1608 if (ddp) { 1609 kref_get(&ddp->refcnt); 1610 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1611 cdev, cdev->ddp); 1612 return -EALREADY; 1613 } 1614 1615 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1616 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1617 lldi->iscsi_iolen, lldi->iscsi_iolen); 1618 if (err < 0) 1619 return err; 1620 1621 ddp = cdev->ddp; 1622 1623 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1624 cxgbi_ddp_page_size_factor(pgsz_factor); 1625 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1626 1627 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1628 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1629 cdev->csk_ddp_set = ddp_set_map; 1630 cdev->csk_ddp_clear = ddp_clear_map; 1631 1632 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1633 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1634 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1635 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1636 " %u/%u.\n", 1637 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1638 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1639 ddp->max_rxsz, lldi->iscsi_iolen); 1640 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1641 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1642 ddp->max_rxsz); 1643 return 0; 1644 } 1645 1646 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1647 { 1648 struct cxgbi_device *cdev; 1649 struct port_info *pi; 1650 int i, rc; 1651 1652 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1653 if (!cdev) { 1654 pr_info("t4 device 0x%p, register failed.\n", lldi); 1655 return NULL; 1656 } 1657 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1658 cdev, lldi->adapter_type, lldi->nports, 1659 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1660 lldi->nrxq, lldi->wr_cred); 1661 for (i = 0; i < lldi->nrxq; i++) 1662 log_debug(1 << CXGBI_DBG_DEV, 1663 "t4 0x%p, rxq id #%d: %u.\n", 1664 cdev, i, lldi->rxq_ids[i]); 1665 1666 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1667 cdev->flags = CXGBI_FLAG_DEV_T4; 1668 cdev->pdev = lldi->pdev; 1669 cdev->ports = lldi->ports; 1670 cdev->nports = lldi->nports; 1671 cdev->mtus = lldi->mtus; 1672 cdev->nmtus = NMTUS; 1673 cdev->snd_win = cxgb4i_snd_win; 1674 cdev->rcv_win = cxgb4i_rcv_win; 1675 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1676 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1677 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1678 cdev->itp = &cxgb4i_iscsi_transport; 1679 1680 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8; 1681 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1682 cdev, lldi->ports[0]->name, cdev->pfvf); 1683 1684 rc = cxgb4i_ddp_init(cdev); 1685 if (rc) { 1686 pr_info("t4 0x%p ddp init failed.\n", cdev); 1687 goto err_out; 1688 } 1689 rc = cxgb4i_ofld_init(cdev); 1690 if (rc) { 1691 pr_info("t4 0x%p ofld init failed.\n", cdev); 1692 goto err_out; 1693 } 1694 1695 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1696 &cxgb4i_host_template, cxgb4i_stt); 1697 if (rc) 1698 goto err_out; 1699 1700 for (i = 0; i < cdev->nports; i++) { 1701 pi = netdev_priv(lldi->ports[i]); 1702 cdev->hbas[i]->port_id = pi->port_id; 1703 } 1704 return cdev; 1705 1706 err_out: 1707 cxgbi_device_unregister(cdev); 1708 return ERR_PTR(-ENOMEM); 1709 } 1710 1711 #define RX_PULL_LEN 128 1712 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1713 const struct pkt_gl *pgl) 1714 { 1715 const struct cpl_act_establish *rpl; 1716 struct sk_buff *skb; 1717 unsigned int opc; 1718 struct cxgbi_device *cdev = handle; 1719 1720 if (pgl == NULL) { 1721 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1722 1723 skb = alloc_wr(len, 0, GFP_ATOMIC); 1724 if (!skb) 1725 goto nomem; 1726 skb_copy_to_linear_data(skb, &rsp[1], len); 1727 } else { 1728 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1729 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1730 pgl->va, be64_to_cpu(*rsp), 1731 be64_to_cpu(*(u64 *)pgl->va), 1732 pgl->tot_len); 1733 return 0; 1734 } 1735 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1736 if (unlikely(!skb)) 1737 goto nomem; 1738 } 1739 1740 rpl = (struct cpl_act_establish *)skb->data; 1741 opc = rpl->ot.opcode; 1742 log_debug(1 << CXGBI_DBG_TOE, 1743 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1744 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1745 if (cxgb4i_cplhandlers[opc]) 1746 cxgb4i_cplhandlers[opc](cdev, skb); 1747 else { 1748 pr_err("No handler for opcode 0x%x.\n", opc); 1749 __kfree_skb(skb); 1750 } 1751 return 0; 1752 nomem: 1753 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1754 return 1; 1755 } 1756 1757 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1758 { 1759 struct cxgbi_device *cdev = handle; 1760 1761 switch (state) { 1762 case CXGB4_STATE_UP: 1763 pr_info("cdev 0x%p, UP.\n", cdev); 1764 break; 1765 case CXGB4_STATE_START_RECOVERY: 1766 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1767 /* close all connections */ 1768 break; 1769 case CXGB4_STATE_DOWN: 1770 pr_info("cdev 0x%p, DOWN.\n", cdev); 1771 break; 1772 case CXGB4_STATE_DETACH: 1773 pr_info("cdev 0x%p, DETACH.\n", cdev); 1774 cxgbi_device_unregister(cdev); 1775 break; 1776 default: 1777 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1778 break; 1779 } 1780 return 0; 1781 } 1782 1783 static int __init cxgb4i_init_module(void) 1784 { 1785 int rc; 1786 1787 printk(KERN_INFO "%s", version); 1788 1789 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1790 if (rc < 0) 1791 return rc; 1792 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1793 1794 return 0; 1795 } 1796 1797 static void __exit cxgb4i_exit_module(void) 1798 { 1799 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1800 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1801 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1802 } 1803 1804 module_init(cxgb4i_init_module); 1805 module_exit(cxgb4i_exit_module); 1806