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