1 /* 2 * cxgb4i.c: Chelsio T4 iSCSI driver. 3 * 4 * Copyright (c) 2010-2015 Chelsio Communications, Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation. 9 * 10 * Written by: Karen Xie (kxie@chelsio.com) 11 * Rakesh Ranjan (rranjan@chelsio.com) 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 #include <scsi/scsi_host.h> 20 #include <net/tcp.h> 21 #include <net/dst.h> 22 #include <linux/netdevice.h> 23 #include <net/addrconf.h> 24 25 #include "t4_regs.h" 26 #include "t4_msg.h" 27 #include "cxgb4.h" 28 #include "cxgb4_uld.h" 29 #include "t4fw_api.h" 30 #include "l2t.h" 31 #include "cxgb4i.h" 32 #include "clip_tbl.h" 33 34 static unsigned int dbg_level; 35 36 #include "../libcxgbi.h" 37 38 #define DRV_MODULE_NAME "cxgb4i" 39 #define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver" 40 #define DRV_MODULE_VERSION "0.9.5-ko" 41 #define DRV_MODULE_RELDATE "Apr. 2015" 42 43 static char version[] = 44 DRV_MODULE_DESC " " DRV_MODULE_NAME 45 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 46 47 MODULE_AUTHOR("Chelsio Communications, Inc."); 48 MODULE_DESCRIPTION(DRV_MODULE_DESC); 49 MODULE_VERSION(DRV_MODULE_VERSION); 50 MODULE_LICENSE("GPL"); 51 52 module_param(dbg_level, uint, 0644); 53 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 54 55 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024) 56 static int cxgb4i_rcv_win = -1; 57 module_param(cxgb4i_rcv_win, int, 0644); 58 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 59 60 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024) 61 static int cxgb4i_snd_win = -1; 62 module_param(cxgb4i_snd_win, int, 0644); 63 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 64 65 static int cxgb4i_rx_credit_thres = 10 * 1024; 66 module_param(cxgb4i_rx_credit_thres, int, 0644); 67 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 68 "RX credits return threshold in bytes (default=10KB)"); 69 70 static unsigned int cxgb4i_max_connect = (8 * 1024); 71 module_param(cxgb4i_max_connect, uint, 0644); 72 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 73 74 static unsigned short cxgb4i_sport_base = 20000; 75 module_param(cxgb4i_sport_base, ushort, 0644); 76 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 77 78 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 79 80 static void *t4_uld_add(const struct cxgb4_lld_info *); 81 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 82 static int t4_uld_state_change(void *, enum cxgb4_state state); 83 static inline int send_tx_flowc_wr(struct cxgbi_sock *); 84 85 static const struct cxgb4_uld_info cxgb4i_uld_info = { 86 .name = DRV_MODULE_NAME, 87 .add = t4_uld_add, 88 .rx_handler = t4_uld_rx_handler, 89 .state_change = t4_uld_state_change, 90 }; 91 92 static struct scsi_host_template cxgb4i_host_template = { 93 .module = THIS_MODULE, 94 .name = DRV_MODULE_NAME, 95 .proc_name = DRV_MODULE_NAME, 96 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 97 .queuecommand = iscsi_queuecommand, 98 .change_queue_depth = scsi_change_queue_depth, 99 .sg_tablesize = SG_ALL, 100 .max_sectors = 0xFFFF, 101 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 102 .eh_abort_handler = iscsi_eh_abort, 103 .eh_device_reset_handler = iscsi_eh_device_reset, 104 .eh_target_reset_handler = iscsi_eh_recover_target, 105 .target_alloc = iscsi_target_alloc, 106 .use_clustering = DISABLE_CLUSTERING, 107 .this_id = -1, 108 .track_queue_depth = 1, 109 }; 110 111 static struct iscsi_transport cxgb4i_iscsi_transport = { 112 .owner = THIS_MODULE, 113 .name = DRV_MODULE_NAME, 114 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 115 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 116 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 117 .attr_is_visible = cxgbi_attr_is_visible, 118 .get_host_param = cxgbi_get_host_param, 119 .set_host_param = cxgbi_set_host_param, 120 /* session management */ 121 .create_session = cxgbi_create_session, 122 .destroy_session = cxgbi_destroy_session, 123 .get_session_param = iscsi_session_get_param, 124 /* connection management */ 125 .create_conn = cxgbi_create_conn, 126 .bind_conn = cxgbi_bind_conn, 127 .destroy_conn = iscsi_tcp_conn_teardown, 128 .start_conn = iscsi_conn_start, 129 .stop_conn = iscsi_conn_stop, 130 .get_conn_param = iscsi_conn_get_param, 131 .set_param = cxgbi_set_conn_param, 132 .get_stats = cxgbi_get_conn_stats, 133 /* pdu xmit req from user space */ 134 .send_pdu = iscsi_conn_send_pdu, 135 /* task */ 136 .init_task = iscsi_tcp_task_init, 137 .xmit_task = iscsi_tcp_task_xmit, 138 .cleanup_task = cxgbi_cleanup_task, 139 /* pdu */ 140 .alloc_pdu = cxgbi_conn_alloc_pdu, 141 .init_pdu = cxgbi_conn_init_pdu, 142 .xmit_pdu = cxgbi_conn_xmit_pdu, 143 .parse_pdu_itt = cxgbi_parse_pdu_itt, 144 /* TCP connect/disconnect */ 145 .get_ep_param = cxgbi_get_ep_param, 146 .ep_connect = cxgbi_ep_connect, 147 .ep_poll = cxgbi_ep_poll, 148 .ep_disconnect = cxgbi_ep_disconnect, 149 /* Error recovery timeout call */ 150 .session_recovery_timedout = iscsi_session_recovery_timedout, 151 }; 152 153 static struct scsi_transport_template *cxgb4i_stt; 154 155 /* 156 * CPL (Chelsio Protocol Language) defines a message passing interface between 157 * the host driver and Chelsio asic. 158 * The section below implments CPLs that related to iscsi tcp connection 159 * open/close/abort and data send/receive. 160 */ 161 162 #define RCV_BUFSIZ_MASK 0x3FFU 163 #define MAX_IMM_TX_PKT_LEN 256 164 165 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 bool is_ofld_imm(const struct sk_buff *skb) 175 { 176 int len = skb->len; 177 178 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 179 len += sizeof(struct fw_ofld_tx_data_wr); 180 181 return len <= MAX_IMM_TX_PKT_LEN; 182 } 183 184 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 185 struct l2t_entry *e) 186 { 187 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 188 int t4 = is_t4(lldi->adapter_type); 189 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 190 unsigned long long opt0; 191 unsigned int opt2; 192 unsigned int qid_atid = ((unsigned int)csk->atid) | 193 (((unsigned int)csk->rss_qid) << 14); 194 195 opt0 = KEEP_ALIVE_F | 196 WND_SCALE_V(wscale) | 197 MSS_IDX_V(csk->mss_idx) | 198 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 199 TX_CHAN_V(csk->tx_chan) | 200 SMAC_SEL_V(csk->smac_idx) | 201 ULP_MODE_V(ULP_MODE_ISCSI) | 202 RCV_BUFSIZ_V(csk->rcv_win >> 10); 203 204 opt2 = RX_CHANNEL_V(0) | 205 RSS_QUEUE_VALID_F | 206 RSS_QUEUE_V(csk->rss_qid); 207 208 if (is_t4(lldi->adapter_type)) { 209 struct cpl_act_open_req *req = 210 (struct cpl_act_open_req *)skb->head; 211 212 INIT_TP_WR(req, 0); 213 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 214 qid_atid)); 215 req->local_port = csk->saddr.sin_port; 216 req->peer_port = csk->daddr.sin_port; 217 req->local_ip = csk->saddr.sin_addr.s_addr; 218 req->peer_ip = csk->daddr.sin_addr.s_addr; 219 req->opt0 = cpu_to_be64(opt0); 220 req->params = cpu_to_be32(cxgb4_select_ntuple( 221 csk->cdev->ports[csk->port_id], 222 csk->l2t)); 223 opt2 |= RX_FC_VALID_F; 224 req->opt2 = cpu_to_be32(opt2); 225 226 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 227 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 228 csk, &req->local_ip, ntohs(req->local_port), 229 &req->peer_ip, ntohs(req->peer_port), 230 csk->atid, csk->rss_qid); 231 } else { 232 struct cpl_t5_act_open_req *req = 233 (struct cpl_t5_act_open_req *)skb->head; 234 u32 isn = (prandom_u32() & ~7UL) - 1; 235 236 INIT_TP_WR(req, 0); 237 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 238 qid_atid)); 239 req->local_port = csk->saddr.sin_port; 240 req->peer_port = csk->daddr.sin_port; 241 req->local_ip = csk->saddr.sin_addr.s_addr; 242 req->peer_ip = csk->daddr.sin_addr.s_addr; 243 req->opt0 = cpu_to_be64(opt0); 244 req->params = cpu_to_be64(FILTER_TUPLE_V( 245 cxgb4_select_ntuple( 246 csk->cdev->ports[csk->port_id], 247 csk->l2t))); 248 req->rsvd = cpu_to_be32(isn); 249 opt2 |= T5_ISS_VALID; 250 opt2 |= T5_OPT_2_VALID_F; 251 252 req->opt2 = cpu_to_be32(opt2); 253 254 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 255 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 256 csk, &req->local_ip, ntohs(req->local_port), 257 &req->peer_ip, ntohs(req->peer_port), 258 csk->atid, csk->rss_qid); 259 } 260 261 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 262 263 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 264 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk, 265 csk->state, csk->flags, csk->atid, csk->rss_qid); 266 267 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 268 } 269 270 #if IS_ENABLED(CONFIG_IPV6) 271 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 272 struct l2t_entry *e) 273 { 274 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 275 int t4 = is_t4(lldi->adapter_type); 276 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 277 unsigned long long opt0; 278 unsigned int opt2; 279 unsigned int qid_atid = ((unsigned int)csk->atid) | 280 (((unsigned int)csk->rss_qid) << 14); 281 282 opt0 = KEEP_ALIVE_F | 283 WND_SCALE_V(wscale) | 284 MSS_IDX_V(csk->mss_idx) | 285 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 286 TX_CHAN_V(csk->tx_chan) | 287 SMAC_SEL_V(csk->smac_idx) | 288 ULP_MODE_V(ULP_MODE_ISCSI) | 289 RCV_BUFSIZ_V(csk->rcv_win >> 10); 290 291 opt2 = RX_CHANNEL_V(0) | 292 RSS_QUEUE_VALID_F | 293 RX_FC_DISABLE_F | 294 RSS_QUEUE_V(csk->rss_qid); 295 296 if (t4) { 297 struct cpl_act_open_req6 *req = 298 (struct cpl_act_open_req6 *)skb->head; 299 300 INIT_TP_WR(req, 0); 301 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 302 qid_atid)); 303 req->local_port = csk->saddr6.sin6_port; 304 req->peer_port = csk->daddr6.sin6_port; 305 306 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 307 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 308 8); 309 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 310 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 311 8); 312 313 req->opt0 = cpu_to_be64(opt0); 314 315 opt2 |= RX_FC_VALID_F; 316 req->opt2 = cpu_to_be32(opt2); 317 318 req->params = cpu_to_be32(cxgb4_select_ntuple( 319 csk->cdev->ports[csk->port_id], 320 csk->l2t)); 321 } else { 322 struct cpl_t5_act_open_req6 *req = 323 (struct cpl_t5_act_open_req6 *)skb->head; 324 325 INIT_TP_WR(req, 0); 326 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 327 qid_atid)); 328 req->local_port = csk->saddr6.sin6_port; 329 req->peer_port = csk->daddr6.sin6_port; 330 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 331 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 332 8); 333 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 334 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 335 8); 336 req->opt0 = cpu_to_be64(opt0); 337 338 opt2 |= T5_OPT_2_VALID_F; 339 req->opt2 = cpu_to_be32(opt2); 340 341 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 342 csk->cdev->ports[csk->port_id], 343 csk->l2t))); 344 } 345 346 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 347 348 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 349 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid, 350 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 351 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 352 csk->rss_qid); 353 354 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 355 } 356 #endif 357 358 static void send_close_req(struct cxgbi_sock *csk) 359 { 360 struct sk_buff *skb = csk->cpl_close; 361 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 362 unsigned int tid = csk->tid; 363 364 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 365 "csk 0x%p,%u,0x%lx, tid %u.\n", 366 csk, csk->state, csk->flags, csk->tid); 367 csk->cpl_close = NULL; 368 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 369 INIT_TP_WR(req, tid); 370 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 371 req->rsvd = 0; 372 373 cxgbi_sock_skb_entail(csk, skb); 374 if (csk->state >= CTP_ESTABLISHED) 375 push_tx_frames(csk, 1); 376 } 377 378 static void abort_arp_failure(void *handle, struct sk_buff *skb) 379 { 380 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 381 struct cpl_abort_req *req; 382 383 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 384 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 385 csk, csk->state, csk->flags, csk->tid); 386 req = (struct cpl_abort_req *)skb->data; 387 req->cmd = CPL_ABORT_NO_RST; 388 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 389 } 390 391 static void send_abort_req(struct cxgbi_sock *csk) 392 { 393 struct cpl_abort_req *req; 394 struct sk_buff *skb = csk->cpl_abort_req; 395 396 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 397 return; 398 399 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 400 send_tx_flowc_wr(csk); 401 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 402 } 403 404 cxgbi_sock_set_state(csk, CTP_ABORTING); 405 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 406 cxgbi_sock_purge_write_queue(csk); 407 408 csk->cpl_abort_req = NULL; 409 req = (struct cpl_abort_req *)skb->head; 410 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 411 req->cmd = CPL_ABORT_SEND_RST; 412 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 413 INIT_TP_WR(req, csk->tid); 414 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 415 req->rsvd0 = htonl(csk->snd_nxt); 416 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 417 418 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 419 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 420 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 421 req->rsvd1); 422 423 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 424 } 425 426 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 427 { 428 struct sk_buff *skb = csk->cpl_abort_rpl; 429 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 430 431 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 432 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 433 csk, csk->state, csk->flags, csk->tid, rst_status); 434 435 csk->cpl_abort_rpl = NULL; 436 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 437 INIT_TP_WR(rpl, csk->tid); 438 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 439 rpl->cmd = rst_status; 440 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 441 } 442 443 /* 444 * CPL connection rx data ack: host -> 445 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 446 * credits sent. 447 */ 448 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 449 { 450 struct sk_buff *skb; 451 struct cpl_rx_data_ack *req; 452 453 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 454 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 455 csk, csk->state, csk->flags, csk->tid, credits); 456 457 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 458 if (!skb) { 459 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 460 return 0; 461 } 462 req = (struct cpl_rx_data_ack *)skb->head; 463 464 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 465 INIT_TP_WR(req, csk->tid); 466 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 467 csk->tid)); 468 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) 469 | RX_FORCE_ACK_F); 470 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 471 return credits; 472 } 473 474 /* 475 * sgl_len - calculates the size of an SGL of the given capacity 476 * @n: the number of SGL entries 477 * Calculates the number of flits needed for a scatter/gather list that 478 * can hold the given number of entries. 479 */ 480 static inline unsigned int sgl_len(unsigned int n) 481 { 482 n--; 483 return (3 * n) / 2 + (n & 1) + 2; 484 } 485 486 /* 487 * calc_tx_flits_ofld - calculate # of flits for an offload packet 488 * @skb: the packet 489 * 490 * Returns the number of flits needed for the given offload packet. 491 * These packets are already fully constructed and no additional headers 492 * will be added. 493 */ 494 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 495 { 496 unsigned int flits, cnt; 497 498 if (is_ofld_imm(skb)) 499 return DIV_ROUND_UP(skb->len, 8); 500 flits = skb_transport_offset(skb) / 8; 501 cnt = skb_shinfo(skb)->nr_frags; 502 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 503 cnt++; 504 return flits + sgl_len(cnt); 505 } 506 507 #define FLOWC_WR_NPARAMS_MIN 9 508 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) 509 { 510 int nparams, flowclen16, flowclen; 511 512 nparams = FLOWC_WR_NPARAMS_MIN; 513 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 514 flowclen16 = DIV_ROUND_UP(flowclen, 16); 515 flowclen = flowclen16 * 16; 516 /* 517 * Return the number of 16-byte credits used by the FlowC request. 518 * Pass back the nparams and actual FlowC length if requested. 519 */ 520 if (nparamsp) 521 *nparamsp = nparams; 522 if (flowclenp) 523 *flowclenp = flowclen; 524 525 return flowclen16; 526 } 527 528 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) 529 { 530 struct sk_buff *skb; 531 struct fw_flowc_wr *flowc; 532 int nparams, flowclen16, flowclen; 533 534 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); 535 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 536 flowc = (struct fw_flowc_wr *)skb->head; 537 flowc->op_to_nparams = 538 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); 539 flowc->flowid_len16 = 540 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); 541 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 542 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 543 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 544 flowc->mnemval[1].val = htonl(csk->tx_chan); 545 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 546 flowc->mnemval[2].val = htonl(csk->tx_chan); 547 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 548 flowc->mnemval[3].val = htonl(csk->rss_qid); 549 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 550 flowc->mnemval[4].val = htonl(csk->snd_nxt); 551 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 552 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 553 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 554 flowc->mnemval[6].val = htonl(csk->snd_win); 555 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 556 flowc->mnemval[7].val = htonl(csk->advmss); 557 flowc->mnemval[8].mnemonic = 0; 558 flowc->mnemval[8].val = 0; 559 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 560 flowc->mnemval[8].val = 16384; 561 562 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 563 564 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 565 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 566 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 567 csk->snd_nxt, csk->rcv_nxt, csk->snd_win, 568 csk->advmss); 569 570 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 571 572 return flowclen16; 573 } 574 575 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 576 int dlen, int len, u32 credits, int compl) 577 { 578 struct fw_ofld_tx_data_wr *req; 579 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 580 unsigned int wr_ulp_mode = 0, val; 581 bool imm = is_ofld_imm(skb); 582 583 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 584 585 if (imm) { 586 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 587 FW_WR_COMPL_F | 588 FW_WR_IMMDLEN_V(dlen)); 589 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | 590 FW_WR_LEN16_V(credits)); 591 } else { 592 req->op_to_immdlen = 593 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 594 FW_WR_COMPL_F | 595 FW_WR_IMMDLEN_V(0)); 596 req->flowid_len16 = 597 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | 598 FW_WR_LEN16_V(credits)); 599 } 600 if (submode) 601 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | 602 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); 603 val = skb_peek(&csk->write_queue) ? 0 : 1; 604 req->tunnel_to_proxy = htonl(wr_ulp_mode | 605 FW_OFLD_TX_DATA_WR_SHOVE_V(val)); 606 req->plen = htonl(len); 607 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 608 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 609 } 610 611 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 612 { 613 kfree_skb(skb); 614 } 615 616 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 617 { 618 int total_size = 0; 619 struct sk_buff *skb; 620 621 if (unlikely(csk->state < CTP_ESTABLISHED || 622 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 623 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 624 1 << CXGBI_DBG_PDU_TX, 625 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 626 csk, csk->state, csk->flags, csk->tid); 627 return 0; 628 } 629 630 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 631 int dlen = skb->len; 632 int len = skb->len; 633 unsigned int credits_needed; 634 int flowclen16 = 0; 635 636 skb_reset_transport_header(skb); 637 if (is_ofld_imm(skb)) 638 credits_needed = DIV_ROUND_UP(dlen, 16); 639 else 640 credits_needed = DIV_ROUND_UP( 641 8 * calc_tx_flits_ofld(skb), 642 16); 643 644 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 645 credits_needed += DIV_ROUND_UP( 646 sizeof(struct fw_ofld_tx_data_wr), 647 16); 648 649 /* 650 * Assumes the initial credits is large enough to support 651 * fw_flowc_wr plus largest possible first payload 652 */ 653 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 654 flowclen16 = send_tx_flowc_wr(csk); 655 csk->wr_cred -= flowclen16; 656 csk->wr_una_cred += flowclen16; 657 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 658 } 659 660 if (csk->wr_cred < credits_needed) { 661 log_debug(1 << CXGBI_DBG_PDU_TX, 662 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 663 csk, skb->len, skb->data_len, 664 credits_needed, csk->wr_cred); 665 break; 666 } 667 __skb_unlink(skb, &csk->write_queue); 668 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 669 skb->csum = credits_needed + flowclen16; 670 csk->wr_cred -= credits_needed; 671 csk->wr_una_cred += credits_needed; 672 cxgbi_sock_enqueue_wr(csk, skb); 673 674 log_debug(1 << CXGBI_DBG_PDU_TX, 675 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 676 csk, skb->len, skb->data_len, credits_needed, 677 csk->wr_cred, csk->wr_una_cred); 678 679 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 680 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 681 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 682 req_completion); 683 csk->snd_nxt += len; 684 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 685 } 686 total_size += skb->truesize; 687 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 688 689 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 690 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 691 csk, csk->state, csk->flags, csk->tid, skb, len); 692 693 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 694 } 695 return total_size; 696 } 697 698 static inline void free_atid(struct cxgbi_sock *csk) 699 { 700 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 701 702 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 703 cxgb4_free_atid(lldi->tids, csk->atid); 704 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 705 cxgbi_sock_put(csk); 706 } 707 } 708 709 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 710 { 711 struct cxgbi_sock *csk; 712 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 713 unsigned short tcp_opt = ntohs(req->tcp_opt); 714 unsigned int tid = GET_TID(req); 715 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 716 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 717 struct tid_info *t = lldi->tids; 718 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 719 720 csk = lookup_atid(t, atid); 721 if (unlikely(!csk)) { 722 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 723 goto rel_skb; 724 } 725 726 if (csk->atid != atid) { 727 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 728 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 729 goto rel_skb; 730 } 731 732 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 733 (&csk->saddr), (&csk->daddr), 734 atid, tid, csk, csk->state, csk->flags, rcv_isn); 735 736 module_put(THIS_MODULE); 737 738 cxgbi_sock_get(csk); 739 csk->tid = tid; 740 cxgb4_insert_tid(lldi->tids, csk, tid); 741 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 742 743 free_atid(csk); 744 745 spin_lock_bh(&csk->lock); 746 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 747 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 748 csk, csk->state, csk->flags, csk->tid); 749 750 if (csk->retry_timer.function) { 751 del_timer(&csk->retry_timer); 752 csk->retry_timer.function = NULL; 753 } 754 755 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 756 /* 757 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 758 * pass through opt0. 759 */ 760 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) 761 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); 762 763 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 764 if (TCPOPT_TSTAMP_G(tcp_opt)) 765 csk->advmss -= 12; 766 if (csk->advmss < 128) 767 csk->advmss = 128; 768 769 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 770 "csk 0x%p, mss_idx %u, advmss %u.\n", 771 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 772 773 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 774 775 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 776 send_abort_req(csk); 777 else { 778 if (skb_queue_len(&csk->write_queue)) 779 push_tx_frames(csk, 0); 780 cxgbi_conn_tx_open(csk); 781 } 782 spin_unlock_bh(&csk->lock); 783 784 rel_skb: 785 __kfree_skb(skb); 786 } 787 788 static int act_open_rpl_status_to_errno(int status) 789 { 790 switch (status) { 791 case CPL_ERR_CONN_RESET: 792 return -ECONNREFUSED; 793 case CPL_ERR_ARP_MISS: 794 return -EHOSTUNREACH; 795 case CPL_ERR_CONN_TIMEDOUT: 796 return -ETIMEDOUT; 797 case CPL_ERR_TCAM_FULL: 798 return -ENOMEM; 799 case CPL_ERR_CONN_EXIST: 800 return -EADDRINUSE; 801 default: 802 return -EIO; 803 } 804 } 805 806 static void csk_act_open_retry_timer(unsigned long data) 807 { 808 struct sk_buff *skb = NULL; 809 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 810 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 811 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 812 struct l2t_entry *); 813 int t4 = is_t4(lldi->adapter_type), size, size6; 814 815 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 816 "csk 0x%p,%u,0x%lx,%u.\n", 817 csk, csk->state, csk->flags, csk->tid); 818 819 cxgbi_sock_get(csk); 820 spin_lock_bh(&csk->lock); 821 822 if (t4) { 823 size = sizeof(struct cpl_act_open_req); 824 size6 = sizeof(struct cpl_act_open_req6); 825 } else { 826 size = sizeof(struct cpl_t5_act_open_req); 827 size6 = sizeof(struct cpl_t5_act_open_req6); 828 } 829 830 if (csk->csk_family == AF_INET) { 831 send_act_open_func = send_act_open_req; 832 skb = alloc_wr(size, 0, GFP_ATOMIC); 833 #if IS_ENABLED(CONFIG_IPV6) 834 } else { 835 send_act_open_func = send_act_open_req6; 836 skb = alloc_wr(size6, 0, GFP_ATOMIC); 837 #endif 838 } 839 840 if (!skb) 841 cxgbi_sock_fail_act_open(csk, -ENOMEM); 842 else { 843 skb->sk = (struct sock *)csk; 844 t4_set_arp_err_handler(skb, csk, 845 cxgbi_sock_act_open_req_arp_failure); 846 send_act_open_func(csk, skb, csk->l2t); 847 } 848 849 spin_unlock_bh(&csk->lock); 850 cxgbi_sock_put(csk); 851 852 } 853 854 static inline bool is_neg_adv(unsigned int status) 855 { 856 return status == CPL_ERR_RTX_NEG_ADVICE || 857 status == CPL_ERR_KEEPALV_NEG_ADVICE || 858 status == CPL_ERR_PERSIST_NEG_ADVICE; 859 } 860 861 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 862 { 863 struct cxgbi_sock *csk; 864 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 865 unsigned int tid = GET_TID(rpl); 866 unsigned int atid = 867 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 868 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 869 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 870 struct tid_info *t = lldi->tids; 871 872 csk = lookup_atid(t, atid); 873 if (unlikely(!csk)) { 874 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 875 goto rel_skb; 876 } 877 878 pr_info_ipaddr("tid %u/%u, status %u.\n" 879 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 880 atid, tid, status, csk, csk->state, csk->flags); 881 882 if (is_neg_adv(status)) 883 goto rel_skb; 884 885 module_put(THIS_MODULE); 886 887 if (status && status != CPL_ERR_TCAM_FULL && 888 status != CPL_ERR_CONN_EXIST && 889 status != CPL_ERR_ARP_MISS) 890 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 891 892 cxgbi_sock_get(csk); 893 spin_lock_bh(&csk->lock); 894 895 if (status == CPL_ERR_CONN_EXIST && 896 csk->retry_timer.function != csk_act_open_retry_timer) { 897 csk->retry_timer.function = csk_act_open_retry_timer; 898 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 899 } else 900 cxgbi_sock_fail_act_open(csk, 901 act_open_rpl_status_to_errno(status)); 902 903 spin_unlock_bh(&csk->lock); 904 cxgbi_sock_put(csk); 905 rel_skb: 906 __kfree_skb(skb); 907 } 908 909 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 910 { 911 struct cxgbi_sock *csk; 912 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 913 unsigned int tid = GET_TID(req); 914 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 915 struct tid_info *t = lldi->tids; 916 917 csk = lookup_tid(t, tid); 918 if (unlikely(!csk)) { 919 pr_err("can't find connection for tid %u.\n", tid); 920 goto rel_skb; 921 } 922 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 923 (&csk->saddr), (&csk->daddr), 924 csk, csk->state, csk->flags, csk->tid); 925 cxgbi_sock_rcv_peer_close(csk); 926 rel_skb: 927 __kfree_skb(skb); 928 } 929 930 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 931 { 932 struct cxgbi_sock *csk; 933 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 934 unsigned int tid = GET_TID(rpl); 935 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 936 struct tid_info *t = lldi->tids; 937 938 csk = lookup_tid(t, tid); 939 if (unlikely(!csk)) { 940 pr_err("can't find connection for tid %u.\n", tid); 941 goto rel_skb; 942 } 943 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 944 (&csk->saddr), (&csk->daddr), 945 csk, csk->state, csk->flags, csk->tid); 946 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 947 rel_skb: 948 __kfree_skb(skb); 949 } 950 951 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 952 int *need_rst) 953 { 954 switch (abort_reason) { 955 case CPL_ERR_BAD_SYN: /* fall through */ 956 case CPL_ERR_CONN_RESET: 957 return csk->state > CTP_ESTABLISHED ? 958 -EPIPE : -ECONNRESET; 959 case CPL_ERR_XMIT_TIMEDOUT: 960 case CPL_ERR_PERSIST_TIMEDOUT: 961 case CPL_ERR_FINWAIT2_TIMEDOUT: 962 case CPL_ERR_KEEPALIVE_TIMEDOUT: 963 return -ETIMEDOUT; 964 default: 965 return -EIO; 966 } 967 } 968 969 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 970 { 971 struct cxgbi_sock *csk; 972 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 973 unsigned int tid = GET_TID(req); 974 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 975 struct tid_info *t = lldi->tids; 976 int rst_status = CPL_ABORT_NO_RST; 977 978 csk = lookup_tid(t, tid); 979 if (unlikely(!csk)) { 980 pr_err("can't find connection for tid %u.\n", tid); 981 goto rel_skb; 982 } 983 984 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 985 (&csk->saddr), (&csk->daddr), 986 csk, csk->state, csk->flags, csk->tid, req->status); 987 988 if (is_neg_adv(req->status)) 989 goto rel_skb; 990 991 cxgbi_sock_get(csk); 992 spin_lock_bh(&csk->lock); 993 994 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 995 996 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 997 send_tx_flowc_wr(csk); 998 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 999 } 1000 1001 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 1002 cxgbi_sock_set_state(csk, CTP_ABORTING); 1003 1004 send_abort_rpl(csk, rst_status); 1005 1006 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1007 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1008 cxgbi_sock_closed(csk); 1009 } 1010 1011 spin_unlock_bh(&csk->lock); 1012 cxgbi_sock_put(csk); 1013 rel_skb: 1014 __kfree_skb(skb); 1015 } 1016 1017 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1018 { 1019 struct cxgbi_sock *csk; 1020 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1021 unsigned int tid = GET_TID(rpl); 1022 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1023 struct tid_info *t = lldi->tids; 1024 1025 csk = lookup_tid(t, tid); 1026 if (!csk) 1027 goto rel_skb; 1028 1029 if (csk) 1030 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1031 (&csk->saddr), (&csk->daddr), csk, 1032 csk->state, csk->flags, csk->tid, rpl->status); 1033 1034 if (rpl->status == CPL_ERR_ABORT_FAILED) 1035 goto rel_skb; 1036 1037 cxgbi_sock_rcv_abort_rpl(csk); 1038 rel_skb: 1039 __kfree_skb(skb); 1040 } 1041 1042 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1043 { 1044 struct cxgbi_sock *csk; 1045 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1046 unsigned int tid = GET_TID(cpl); 1047 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1048 struct tid_info *t = lldi->tids; 1049 1050 csk = lookup_tid(t, tid); 1051 if (!csk) { 1052 pr_err("can't find connection for tid %u.\n", tid); 1053 } else { 1054 /* not expecting this, reset the connection. */ 1055 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1056 spin_lock_bh(&csk->lock); 1057 send_abort_req(csk); 1058 spin_unlock_bh(&csk->lock); 1059 } 1060 __kfree_skb(skb); 1061 } 1062 1063 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1064 { 1065 struct cxgbi_sock *csk; 1066 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1067 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1068 unsigned int tid = GET_TID(cpl); 1069 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1070 struct tid_info *t = lldi->tids; 1071 1072 csk = lookup_tid(t, tid); 1073 if (unlikely(!csk)) { 1074 pr_err("can't find conn. for tid %u.\n", tid); 1075 goto rel_skb; 1076 } 1077 1078 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1079 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1080 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1081 pdu_len_ddp); 1082 1083 spin_lock_bh(&csk->lock); 1084 1085 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1086 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1087 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1088 csk, csk->state, csk->flags, csk->tid); 1089 if (csk->state != CTP_ABORTING) 1090 goto abort_conn; 1091 else 1092 goto discard; 1093 } 1094 1095 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1096 cxgbi_skcb_flags(skb) = 0; 1097 1098 skb_reset_transport_header(skb); 1099 __skb_pull(skb, sizeof(*cpl)); 1100 __pskb_trim(skb, ntohs(cpl->len)); 1101 1102 if (!csk->skb_ulp_lhdr) { 1103 unsigned char *bhs; 1104 unsigned int hlen, dlen, plen; 1105 1106 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1107 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1108 csk, csk->state, csk->flags, csk->tid, skb); 1109 csk->skb_ulp_lhdr = skb; 1110 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1111 1112 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1113 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1114 csk->tid, cxgbi_skcb_tcp_seq(skb), 1115 csk->rcv_nxt); 1116 goto abort_conn; 1117 } 1118 1119 bhs = skb->data; 1120 hlen = ntohs(cpl->len); 1121 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1122 1123 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1124 if (is_t4(lldi->adapter_type)) 1125 plen -= 40; 1126 1127 if ((hlen + dlen) != plen) { 1128 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1129 "mismatch %u != %u + %u, seq 0x%x.\n", 1130 csk->tid, plen, hlen, dlen, 1131 cxgbi_skcb_tcp_seq(skb)); 1132 goto abort_conn; 1133 } 1134 1135 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1136 if (dlen) 1137 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1138 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1139 1140 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1141 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1142 csk, skb, *bhs, hlen, dlen, 1143 ntohl(*((unsigned int *)(bhs + 16))), 1144 ntohl(*((unsigned int *)(bhs + 24)))); 1145 1146 } else { 1147 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1148 1149 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1150 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1151 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1152 csk, csk->state, csk->flags, skb, lskb); 1153 } 1154 1155 __skb_queue_tail(&csk->receive_queue, skb); 1156 spin_unlock_bh(&csk->lock); 1157 return; 1158 1159 abort_conn: 1160 send_abort_req(csk); 1161 discard: 1162 spin_unlock_bh(&csk->lock); 1163 rel_skb: 1164 __kfree_skb(skb); 1165 } 1166 1167 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1168 struct sk_buff *skb) 1169 { 1170 struct cxgbi_sock *csk; 1171 struct sk_buff *lskb; 1172 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1173 unsigned int tid = GET_TID(rpl); 1174 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1175 struct tid_info *t = lldi->tids; 1176 unsigned int status = ntohl(rpl->ddpvld); 1177 1178 csk = lookup_tid(t, tid); 1179 if (unlikely(!csk)) { 1180 pr_err("can't find connection for tid %u.\n", tid); 1181 goto rel_skb; 1182 } 1183 1184 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1185 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1186 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1187 1188 spin_lock_bh(&csk->lock); 1189 1190 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1191 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1192 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1193 csk, csk->state, csk->flags, csk->tid); 1194 if (csk->state != CTP_ABORTING) 1195 goto abort_conn; 1196 else 1197 goto discard; 1198 } 1199 1200 if (!csk->skb_ulp_lhdr) { 1201 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1202 goto abort_conn; 1203 } 1204 1205 lskb = csk->skb_ulp_lhdr; 1206 csk->skb_ulp_lhdr = NULL; 1207 1208 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1209 1210 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1211 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1212 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1213 1214 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1215 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1216 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1217 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1218 } 1219 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1220 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1221 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1222 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1223 } 1224 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1225 log_debug(1 << CXGBI_DBG_PDU_RX, 1226 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1227 csk, lskb, status); 1228 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1229 } 1230 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1231 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1232 log_debug(1 << CXGBI_DBG_PDU_RX, 1233 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1234 csk, lskb, status); 1235 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1236 } 1237 log_debug(1 << CXGBI_DBG_PDU_RX, 1238 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1239 csk, lskb, cxgbi_skcb_flags(lskb)); 1240 1241 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1242 cxgbi_conn_pdu_ready(csk); 1243 spin_unlock_bh(&csk->lock); 1244 goto rel_skb; 1245 1246 abort_conn: 1247 send_abort_req(csk); 1248 discard: 1249 spin_unlock_bh(&csk->lock); 1250 rel_skb: 1251 __kfree_skb(skb); 1252 } 1253 1254 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1255 { 1256 struct cxgbi_sock *csk; 1257 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1258 unsigned int tid = GET_TID(rpl); 1259 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1260 struct tid_info *t = lldi->tids; 1261 1262 csk = lookup_tid(t, tid); 1263 if (unlikely(!csk)) 1264 pr_err("can't find connection for tid %u.\n", tid); 1265 else { 1266 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1267 "csk 0x%p,%u,0x%lx,%u.\n", 1268 csk, csk->state, csk->flags, csk->tid); 1269 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1270 rpl->seq_vld); 1271 } 1272 __kfree_skb(skb); 1273 } 1274 1275 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1276 { 1277 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1278 unsigned int tid = GET_TID(rpl); 1279 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1280 struct tid_info *t = lldi->tids; 1281 struct cxgbi_sock *csk; 1282 1283 csk = lookup_tid(t, tid); 1284 if (!csk) 1285 pr_err("can't find conn. for tid %u.\n", tid); 1286 1287 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1288 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1289 csk, csk->state, csk->flags, csk->tid, rpl->status); 1290 1291 if (rpl->status != CPL_ERR_NONE) 1292 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1293 csk, tid, rpl->status); 1294 1295 __kfree_skb(skb); 1296 } 1297 1298 static int alloc_cpls(struct cxgbi_sock *csk) 1299 { 1300 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1301 0, GFP_KERNEL); 1302 if (!csk->cpl_close) 1303 return -ENOMEM; 1304 1305 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1306 0, GFP_KERNEL); 1307 if (!csk->cpl_abort_req) 1308 goto free_cpls; 1309 1310 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1311 0, GFP_KERNEL); 1312 if (!csk->cpl_abort_rpl) 1313 goto free_cpls; 1314 return 0; 1315 1316 free_cpls: 1317 cxgbi_sock_free_cpl_skbs(csk); 1318 return -ENOMEM; 1319 } 1320 1321 static inline void l2t_put(struct cxgbi_sock *csk) 1322 { 1323 if (csk->l2t) { 1324 cxgb4_l2t_release(csk->l2t); 1325 csk->l2t = NULL; 1326 cxgbi_sock_put(csk); 1327 } 1328 } 1329 1330 static void release_offload_resources(struct cxgbi_sock *csk) 1331 { 1332 struct cxgb4_lld_info *lldi; 1333 #if IS_ENABLED(CONFIG_IPV6) 1334 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1335 #endif 1336 1337 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1338 "csk 0x%p,%u,0x%lx,%u.\n", 1339 csk, csk->state, csk->flags, csk->tid); 1340 1341 cxgbi_sock_free_cpl_skbs(csk); 1342 if (csk->wr_cred != csk->wr_max_cred) { 1343 cxgbi_sock_purge_wr_queue(csk); 1344 cxgbi_sock_reset_wr_list(csk); 1345 } 1346 1347 l2t_put(csk); 1348 #if IS_ENABLED(CONFIG_IPV6) 1349 if (csk->csk_family == AF_INET6) 1350 cxgb4_clip_release(ndev, 1351 (const u32 *)&csk->saddr6.sin6_addr, 1); 1352 #endif 1353 1354 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1355 free_atid(csk); 1356 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1357 lldi = cxgbi_cdev_priv(csk->cdev); 1358 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1359 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1360 cxgbi_sock_put(csk); 1361 } 1362 csk->dst = NULL; 1363 csk->cdev = NULL; 1364 } 1365 1366 static int init_act_open(struct cxgbi_sock *csk) 1367 { 1368 struct cxgbi_device *cdev = csk->cdev; 1369 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1370 struct net_device *ndev = cdev->ports[csk->port_id]; 1371 struct sk_buff *skb = NULL; 1372 struct neighbour *n = NULL; 1373 void *daddr; 1374 unsigned int step; 1375 unsigned int size, size6; 1376 int t4 = is_t4(lldi->adapter_type); 1377 unsigned int linkspeed; 1378 unsigned int rcv_winf, snd_winf; 1379 1380 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1381 "csk 0x%p,%u,0x%lx,%u.\n", 1382 csk, csk->state, csk->flags, csk->tid); 1383 1384 if (csk->csk_family == AF_INET) 1385 daddr = &csk->daddr.sin_addr.s_addr; 1386 #if IS_ENABLED(CONFIG_IPV6) 1387 else if (csk->csk_family == AF_INET6) 1388 daddr = &csk->daddr6.sin6_addr; 1389 #endif 1390 else { 1391 pr_err("address family 0x%x not supported\n", csk->csk_family); 1392 goto rel_resource; 1393 } 1394 1395 n = dst_neigh_lookup(csk->dst, daddr); 1396 1397 if (!n) { 1398 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1399 goto rel_resource; 1400 } 1401 1402 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1403 if (csk->atid < 0) { 1404 pr_err("%s, NO atid available.\n", ndev->name); 1405 return -EINVAL; 1406 } 1407 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1408 cxgbi_sock_get(csk); 1409 1410 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1411 if (!csk->l2t) { 1412 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1413 goto rel_resource_without_clip; 1414 } 1415 cxgbi_sock_get(csk); 1416 1417 #if IS_ENABLED(CONFIG_IPV6) 1418 if (csk->csk_family == AF_INET6) 1419 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1420 #endif 1421 1422 if (t4) { 1423 size = sizeof(struct cpl_act_open_req); 1424 size6 = sizeof(struct cpl_act_open_req6); 1425 } else { 1426 size = sizeof(struct cpl_t5_act_open_req); 1427 size6 = sizeof(struct cpl_t5_act_open_req6); 1428 } 1429 1430 if (csk->csk_family == AF_INET) 1431 skb = alloc_wr(size, 0, GFP_NOIO); 1432 #if IS_ENABLED(CONFIG_IPV6) 1433 else 1434 skb = alloc_wr(size6, 0, GFP_NOIO); 1435 #endif 1436 1437 if (!skb) 1438 goto rel_resource; 1439 skb->sk = (struct sock *)csk; 1440 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1441 1442 if (!csk->mtu) 1443 csk->mtu = dst_mtu(csk->dst); 1444 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1445 csk->tx_chan = cxgb4_port_chan(ndev); 1446 /* SMT two entries per row */ 1447 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1448 step = lldi->ntxq / lldi->nchan; 1449 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1450 step = lldi->nrxq / lldi->nchan; 1451 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1452 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; 1453 csk->snd_win = cxgb4i_snd_win; 1454 csk->rcv_win = cxgb4i_rcv_win; 1455 if (cxgb4i_rcv_win <= 0) { 1456 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; 1457 rcv_winf = linkspeed / SPEED_10000; 1458 if (rcv_winf) 1459 csk->rcv_win *= rcv_winf; 1460 } 1461 if (cxgb4i_snd_win <= 0) { 1462 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; 1463 snd_winf = linkspeed / SPEED_10000; 1464 if (snd_winf) 1465 csk->snd_win *= snd_winf; 1466 } 1467 csk->wr_cred = lldi->wr_cred - 1468 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1469 csk->wr_max_cred = csk->wr_cred; 1470 csk->wr_una_cred = 0; 1471 cxgbi_sock_reset_wr_list(csk); 1472 csk->err = 0; 1473 1474 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1475 (&csk->saddr), (&csk->daddr), csk, csk->state, 1476 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1477 csk->mtu, csk->mss_idx, csk->smac_idx); 1478 1479 /* must wait for either a act_open_rpl or act_open_establish */ 1480 try_module_get(THIS_MODULE); 1481 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1482 if (csk->csk_family == AF_INET) 1483 send_act_open_req(csk, skb, csk->l2t); 1484 #if IS_ENABLED(CONFIG_IPV6) 1485 else 1486 send_act_open_req6(csk, skb, csk->l2t); 1487 #endif 1488 neigh_release(n); 1489 1490 return 0; 1491 1492 rel_resource: 1493 #if IS_ENABLED(CONFIG_IPV6) 1494 if (csk->csk_family == AF_INET6) 1495 cxgb4_clip_release(ndev, 1496 (const u32 *)&csk->saddr6.sin6_addr, 1); 1497 #endif 1498 rel_resource_without_clip: 1499 if (n) 1500 neigh_release(n); 1501 if (skb) 1502 __kfree_skb(skb); 1503 return -EINVAL; 1504 } 1505 1506 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1507 [CPL_ACT_ESTABLISH] = do_act_establish, 1508 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1509 [CPL_PEER_CLOSE] = do_peer_close, 1510 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1511 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1512 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1513 [CPL_FW4_ACK] = do_fw4_ack, 1514 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1515 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1516 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1517 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1518 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1519 [CPL_RX_DATA] = do_rx_data, 1520 }; 1521 1522 static int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1523 { 1524 int rc; 1525 1526 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1527 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1528 1529 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1530 cxgb4i_max_connect); 1531 if (rc < 0) 1532 return rc; 1533 1534 cdev->csk_release_offload_resources = release_offload_resources; 1535 cdev->csk_push_tx_frames = push_tx_frames; 1536 cdev->csk_send_abort_req = send_abort_req; 1537 cdev->csk_send_close_req = send_close_req; 1538 cdev->csk_send_rx_credits = send_rx_credits; 1539 cdev->csk_alloc_cpls = alloc_cpls; 1540 cdev->csk_init_act_open = init_act_open; 1541 1542 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1543 return 0; 1544 } 1545 1546 static inline void 1547 ulp_mem_io_set_hdr(struct cxgbi_device *cdev, 1548 struct ulp_mem_io *req, 1549 unsigned int wr_len, unsigned int dlen, 1550 unsigned int pm_addr, 1551 int tid) 1552 { 1553 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1554 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1555 1556 INIT_ULPTX_WR(req, wr_len, 0, tid); 1557 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | 1558 FW_WR_ATOMIC_V(0)); 1559 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1560 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | 1561 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); 1562 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1563 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1564 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1565 1566 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1567 idata->len = htonl(dlen); 1568 } 1569 1570 static struct sk_buff * 1571 ddp_ppod_init_idata(struct cxgbi_device *cdev, 1572 struct cxgbi_ppm *ppm, 1573 unsigned int idx, unsigned int npods, 1574 unsigned int tid) 1575 { 1576 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1577 unsigned int dlen = npods << PPOD_SIZE_SHIFT; 1578 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1579 sizeof(struct ulptx_idata) + dlen, 16); 1580 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1581 1582 if (!skb) { 1583 pr_err("%s: %s idx %u, npods %u, OOM.\n", 1584 __func__, ppm->ndev->name, idx, npods); 1585 return NULL; 1586 } 1587 1588 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, 1589 pm_addr, tid); 1590 1591 return skb; 1592 } 1593 1594 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1595 struct cxgbi_task_tag_info *ttinfo, 1596 unsigned int idx, unsigned int npods, 1597 struct scatterlist **sg_pp, 1598 unsigned int *sg_off) 1599 { 1600 struct cxgbi_device *cdev = csk->cdev; 1601 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, 1602 csk->tid); 1603 struct ulp_mem_io *req; 1604 struct ulptx_idata *idata; 1605 struct cxgbi_pagepod *ppod; 1606 int i; 1607 1608 if (!skb) 1609 return -ENOMEM; 1610 1611 req = (struct ulp_mem_io *)skb->head; 1612 idata = (struct ulptx_idata *)(req + 1); 1613 ppod = (struct cxgbi_pagepod *)(idata + 1); 1614 1615 for (i = 0; i < npods; i++, ppod++) 1616 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); 1617 1618 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); 1619 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); 1620 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 1621 1622 spin_lock_bh(&csk->lock); 1623 cxgbi_sock_skb_entail(csk, skb); 1624 spin_unlock_bh(&csk->lock); 1625 1626 return 0; 1627 } 1628 1629 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1630 struct cxgbi_task_tag_info *ttinfo) 1631 { 1632 unsigned int pidx = ttinfo->idx; 1633 unsigned int npods = ttinfo->npods; 1634 unsigned int i, cnt; 1635 int err = 0; 1636 struct scatterlist *sg = ttinfo->sgl; 1637 unsigned int offset = 0; 1638 1639 ttinfo->cid = csk->port_id; 1640 1641 for (i = 0; i < npods; i += cnt, pidx += cnt) { 1642 cnt = npods - i; 1643 1644 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1645 cnt = ULPMEM_IDATA_MAX_NPPODS; 1646 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, 1647 &sg, &offset); 1648 if (err < 0) 1649 break; 1650 } 1651 1652 return err; 1653 } 1654 1655 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1656 int pg_idx, bool reply) 1657 { 1658 struct sk_buff *skb; 1659 struct cpl_set_tcb_field *req; 1660 1661 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1662 return 0; 1663 1664 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1665 if (!skb) 1666 return -ENOMEM; 1667 1668 /* set up ulp page size */ 1669 req = (struct cpl_set_tcb_field *)skb->head; 1670 INIT_TP_WR(req, csk->tid); 1671 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1672 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1673 req->word_cookie = htons(0); 1674 req->mask = cpu_to_be64(0x3 << 8); 1675 req->val = cpu_to_be64(pg_idx << 8); 1676 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1677 1678 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1679 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1680 1681 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1682 return 0; 1683 } 1684 1685 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1686 int hcrc, int dcrc, int reply) 1687 { 1688 struct sk_buff *skb; 1689 struct cpl_set_tcb_field *req; 1690 1691 if (!hcrc && !dcrc) 1692 return 0; 1693 1694 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1695 if (!skb) 1696 return -ENOMEM; 1697 1698 csk->hcrc_len = (hcrc ? 4 : 0); 1699 csk->dcrc_len = (dcrc ? 4 : 0); 1700 /* set up ulp submode */ 1701 req = (struct cpl_set_tcb_field *)skb->head; 1702 INIT_TP_WR(req, tid); 1703 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1704 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1705 req->word_cookie = htons(0); 1706 req->mask = cpu_to_be64(0x3 << 4); 1707 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1708 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1709 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1710 1711 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1712 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1713 1714 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1715 return 0; 1716 } 1717 1718 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) 1719 { 1720 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) 1721 (cxgbi_cdev_priv(cdev)))->iscsi_ppm); 1722 } 1723 1724 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1725 { 1726 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1727 struct net_device *ndev = cdev->ports[0]; 1728 struct cxgbi_tag_format tformat; 1729 unsigned int ppmax; 1730 int i; 1731 1732 if (!lldi->vr->iscsi.size) { 1733 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); 1734 return -EACCES; 1735 } 1736 1737 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; 1738 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; 1739 1740 memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); 1741 for (i = 0; i < 4; i++) 1742 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) 1743 & 0xF; 1744 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); 1745 1746 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, 1747 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); 1748 1749 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1750 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1751 cdev->csk_ddp_set_map = ddp_set_map; 1752 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1753 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1754 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1755 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1756 cdev->cdev2ppm = cdev2ppm; 1757 1758 return 0; 1759 } 1760 1761 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1762 { 1763 struct cxgbi_device *cdev; 1764 struct port_info *pi; 1765 int i, rc; 1766 1767 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1768 if (!cdev) { 1769 pr_info("t4 device 0x%p, register failed.\n", lldi); 1770 return NULL; 1771 } 1772 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1773 cdev, lldi->adapter_type, lldi->nports, 1774 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1775 lldi->nrxq, lldi->wr_cred); 1776 for (i = 0; i < lldi->nrxq; i++) 1777 log_debug(1 << CXGBI_DBG_DEV, 1778 "t4 0x%p, rxq id #%d: %u.\n", 1779 cdev, i, lldi->rxq_ids[i]); 1780 1781 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1782 cdev->flags = CXGBI_FLAG_DEV_T4; 1783 cdev->pdev = lldi->pdev; 1784 cdev->ports = lldi->ports; 1785 cdev->nports = lldi->nports; 1786 cdev->mtus = lldi->mtus; 1787 cdev->nmtus = NMTUS; 1788 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1789 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1790 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1791 cdev->itp = &cxgb4i_iscsi_transport; 1792 1793 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 1794 << FW_VIID_PFN_S; 1795 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1796 cdev, lldi->ports[0]->name, cdev->pfvf); 1797 1798 rc = cxgb4i_ddp_init(cdev); 1799 if (rc) { 1800 pr_info("t4 0x%p ddp init failed.\n", cdev); 1801 goto err_out; 1802 } 1803 rc = cxgb4i_ofld_init(cdev); 1804 if (rc) { 1805 pr_info("t4 0x%p ofld init failed.\n", cdev); 1806 goto err_out; 1807 } 1808 1809 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1810 &cxgb4i_host_template, cxgb4i_stt); 1811 if (rc) 1812 goto err_out; 1813 1814 for (i = 0; i < cdev->nports; i++) { 1815 pi = netdev_priv(lldi->ports[i]); 1816 cdev->hbas[i]->port_id = pi->port_id; 1817 } 1818 return cdev; 1819 1820 err_out: 1821 cxgbi_device_unregister(cdev); 1822 return ERR_PTR(-ENOMEM); 1823 } 1824 1825 #define RX_PULL_LEN 128 1826 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1827 const struct pkt_gl *pgl) 1828 { 1829 const struct cpl_act_establish *rpl; 1830 struct sk_buff *skb; 1831 unsigned int opc; 1832 struct cxgbi_device *cdev = handle; 1833 1834 if (pgl == NULL) { 1835 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1836 1837 skb = alloc_wr(len, 0, GFP_ATOMIC); 1838 if (!skb) 1839 goto nomem; 1840 skb_copy_to_linear_data(skb, &rsp[1], len); 1841 } else { 1842 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1843 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1844 pgl->va, be64_to_cpu(*rsp), 1845 be64_to_cpu(*(u64 *)pgl->va), 1846 pgl->tot_len); 1847 return 0; 1848 } 1849 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1850 if (unlikely(!skb)) 1851 goto nomem; 1852 } 1853 1854 rpl = (struct cpl_act_establish *)skb->data; 1855 opc = rpl->ot.opcode; 1856 log_debug(1 << CXGBI_DBG_TOE, 1857 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1858 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1859 if (cxgb4i_cplhandlers[opc]) 1860 cxgb4i_cplhandlers[opc](cdev, skb); 1861 else { 1862 pr_err("No handler for opcode 0x%x.\n", opc); 1863 __kfree_skb(skb); 1864 } 1865 return 0; 1866 nomem: 1867 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1868 return 1; 1869 } 1870 1871 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1872 { 1873 struct cxgbi_device *cdev = handle; 1874 1875 switch (state) { 1876 case CXGB4_STATE_UP: 1877 pr_info("cdev 0x%p, UP.\n", cdev); 1878 break; 1879 case CXGB4_STATE_START_RECOVERY: 1880 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1881 /* close all connections */ 1882 break; 1883 case CXGB4_STATE_DOWN: 1884 pr_info("cdev 0x%p, DOWN.\n", cdev); 1885 break; 1886 case CXGB4_STATE_DETACH: 1887 pr_info("cdev 0x%p, DETACH.\n", cdev); 1888 cxgbi_device_unregister(cdev); 1889 break; 1890 default: 1891 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1892 break; 1893 } 1894 return 0; 1895 } 1896 1897 static int __init cxgb4i_init_module(void) 1898 { 1899 int rc; 1900 1901 printk(KERN_INFO "%s", version); 1902 1903 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1904 if (rc < 0) 1905 return rc; 1906 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1907 1908 return 0; 1909 } 1910 1911 static void __exit cxgb4i_exit_module(void) 1912 { 1913 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1914 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1915 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1916 } 1917 1918 module_init(cxgb4i_init_module); 1919 module_exit(cxgb4i_exit_module); 1920