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 .nrxq = MAX_ULD_QSETS, 88 .rxq_size = 1024, 89 .lro = false, 90 .add = t4_uld_add, 91 .rx_handler = t4_uld_rx_handler, 92 .state_change = t4_uld_state_change, 93 }; 94 95 static struct scsi_host_template cxgb4i_host_template = { 96 .module = THIS_MODULE, 97 .name = DRV_MODULE_NAME, 98 .proc_name = DRV_MODULE_NAME, 99 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 100 .queuecommand = iscsi_queuecommand, 101 .change_queue_depth = scsi_change_queue_depth, 102 .sg_tablesize = SG_ALL, 103 .max_sectors = 0xFFFF, 104 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 105 .eh_abort_handler = iscsi_eh_abort, 106 .eh_device_reset_handler = iscsi_eh_device_reset, 107 .eh_target_reset_handler = iscsi_eh_recover_target, 108 .target_alloc = iscsi_target_alloc, 109 .use_clustering = DISABLE_CLUSTERING, 110 .this_id = -1, 111 .track_queue_depth = 1, 112 }; 113 114 static struct iscsi_transport cxgb4i_iscsi_transport = { 115 .owner = THIS_MODULE, 116 .name = DRV_MODULE_NAME, 117 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 118 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 119 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 120 .attr_is_visible = cxgbi_attr_is_visible, 121 .get_host_param = cxgbi_get_host_param, 122 .set_host_param = cxgbi_set_host_param, 123 /* session management */ 124 .create_session = cxgbi_create_session, 125 .destroy_session = cxgbi_destroy_session, 126 .get_session_param = iscsi_session_get_param, 127 /* connection management */ 128 .create_conn = cxgbi_create_conn, 129 .bind_conn = cxgbi_bind_conn, 130 .destroy_conn = iscsi_tcp_conn_teardown, 131 .start_conn = iscsi_conn_start, 132 .stop_conn = iscsi_conn_stop, 133 .get_conn_param = iscsi_conn_get_param, 134 .set_param = cxgbi_set_conn_param, 135 .get_stats = cxgbi_get_conn_stats, 136 /* pdu xmit req from user space */ 137 .send_pdu = iscsi_conn_send_pdu, 138 /* task */ 139 .init_task = iscsi_tcp_task_init, 140 .xmit_task = iscsi_tcp_task_xmit, 141 .cleanup_task = cxgbi_cleanup_task, 142 /* pdu */ 143 .alloc_pdu = cxgbi_conn_alloc_pdu, 144 .init_pdu = cxgbi_conn_init_pdu, 145 .xmit_pdu = cxgbi_conn_xmit_pdu, 146 .parse_pdu_itt = cxgbi_parse_pdu_itt, 147 /* TCP connect/disconnect */ 148 .get_ep_param = cxgbi_get_ep_param, 149 .ep_connect = cxgbi_ep_connect, 150 .ep_poll = cxgbi_ep_poll, 151 .ep_disconnect = cxgbi_ep_disconnect, 152 /* Error recovery timeout call */ 153 .session_recovery_timedout = iscsi_session_recovery_timedout, 154 }; 155 156 static struct scsi_transport_template *cxgb4i_stt; 157 158 /* 159 * CPL (Chelsio Protocol Language) defines a message passing interface between 160 * the host driver and Chelsio asic. 161 * The section below implments CPLs that related to iscsi tcp connection 162 * open/close/abort and data send/receive. 163 */ 164 165 #define RCV_BUFSIZ_MASK 0x3FFU 166 #define MAX_IMM_TX_PKT_LEN 256 167 168 static int push_tx_frames(struct cxgbi_sock *, int); 169 170 /* 171 * is_ofld_imm - check whether a packet can be sent as immediate data 172 * @skb: the packet 173 * 174 * Returns true if a packet can be sent as an offload WR with immediate 175 * data. We currently use the same limit as for Ethernet packets. 176 */ 177 static inline bool is_ofld_imm(const struct sk_buff *skb) 178 { 179 int len = skb->len; 180 181 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 182 len += sizeof(struct fw_ofld_tx_data_wr); 183 184 return len <= MAX_IMM_TX_PKT_LEN; 185 } 186 187 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 188 struct l2t_entry *e) 189 { 190 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 191 int t4 = is_t4(lldi->adapter_type); 192 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 193 unsigned long long opt0; 194 unsigned int opt2; 195 unsigned int qid_atid = ((unsigned int)csk->atid) | 196 (((unsigned int)csk->rss_qid) << 14); 197 198 opt0 = KEEP_ALIVE_F | 199 WND_SCALE_V(wscale) | 200 MSS_IDX_V(csk->mss_idx) | 201 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 202 TX_CHAN_V(csk->tx_chan) | 203 SMAC_SEL_V(csk->smac_idx) | 204 ULP_MODE_V(ULP_MODE_ISCSI) | 205 RCV_BUFSIZ_V(csk->rcv_win >> 10); 206 207 opt2 = RX_CHANNEL_V(0) | 208 RSS_QUEUE_VALID_F | 209 RSS_QUEUE_V(csk->rss_qid); 210 211 if (is_t4(lldi->adapter_type)) { 212 struct cpl_act_open_req *req = 213 (struct cpl_act_open_req *)skb->head; 214 215 INIT_TP_WR(req, 0); 216 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 217 qid_atid)); 218 req->local_port = csk->saddr.sin_port; 219 req->peer_port = csk->daddr.sin_port; 220 req->local_ip = csk->saddr.sin_addr.s_addr; 221 req->peer_ip = csk->daddr.sin_addr.s_addr; 222 req->opt0 = cpu_to_be64(opt0); 223 req->params = cpu_to_be32(cxgb4_select_ntuple( 224 csk->cdev->ports[csk->port_id], 225 csk->l2t)); 226 opt2 |= RX_FC_VALID_F; 227 req->opt2 = cpu_to_be32(opt2); 228 229 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 230 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 231 csk, &req->local_ip, ntohs(req->local_port), 232 &req->peer_ip, ntohs(req->peer_port), 233 csk->atid, csk->rss_qid); 234 } else { 235 struct cpl_t5_act_open_req *req = 236 (struct cpl_t5_act_open_req *)skb->head; 237 u32 isn = (prandom_u32() & ~7UL) - 1; 238 239 INIT_TP_WR(req, 0); 240 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 241 qid_atid)); 242 req->local_port = csk->saddr.sin_port; 243 req->peer_port = csk->daddr.sin_port; 244 req->local_ip = csk->saddr.sin_addr.s_addr; 245 req->peer_ip = csk->daddr.sin_addr.s_addr; 246 req->opt0 = cpu_to_be64(opt0); 247 req->params = cpu_to_be64(FILTER_TUPLE_V( 248 cxgb4_select_ntuple( 249 csk->cdev->ports[csk->port_id], 250 csk->l2t))); 251 req->rsvd = cpu_to_be32(isn); 252 opt2 |= T5_ISS_VALID; 253 opt2 |= T5_OPT_2_VALID_F; 254 255 req->opt2 = cpu_to_be32(opt2); 256 257 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 258 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 259 csk, &req->local_ip, ntohs(req->local_port), 260 &req->peer_ip, ntohs(req->peer_port), 261 csk->atid, csk->rss_qid); 262 } 263 264 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 265 266 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 267 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk, 268 csk->state, csk->flags, csk->atid, csk->rss_qid); 269 270 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 271 } 272 273 #if IS_ENABLED(CONFIG_IPV6) 274 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 275 struct l2t_entry *e) 276 { 277 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 278 int t4 = is_t4(lldi->adapter_type); 279 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 280 unsigned long long opt0; 281 unsigned int opt2; 282 unsigned int qid_atid = ((unsigned int)csk->atid) | 283 (((unsigned int)csk->rss_qid) << 14); 284 285 opt0 = KEEP_ALIVE_F | 286 WND_SCALE_V(wscale) | 287 MSS_IDX_V(csk->mss_idx) | 288 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 289 TX_CHAN_V(csk->tx_chan) | 290 SMAC_SEL_V(csk->smac_idx) | 291 ULP_MODE_V(ULP_MODE_ISCSI) | 292 RCV_BUFSIZ_V(csk->rcv_win >> 10); 293 294 opt2 = RX_CHANNEL_V(0) | 295 RSS_QUEUE_VALID_F | 296 RX_FC_DISABLE_F | 297 RSS_QUEUE_V(csk->rss_qid); 298 299 if (t4) { 300 struct cpl_act_open_req6 *req = 301 (struct cpl_act_open_req6 *)skb->head; 302 303 INIT_TP_WR(req, 0); 304 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 305 qid_atid)); 306 req->local_port = csk->saddr6.sin6_port; 307 req->peer_port = csk->daddr6.sin6_port; 308 309 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 310 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 311 8); 312 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 313 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 314 8); 315 316 req->opt0 = cpu_to_be64(opt0); 317 318 opt2 |= RX_FC_VALID_F; 319 req->opt2 = cpu_to_be32(opt2); 320 321 req->params = cpu_to_be32(cxgb4_select_ntuple( 322 csk->cdev->ports[csk->port_id], 323 csk->l2t)); 324 } else { 325 struct cpl_t5_act_open_req6 *req = 326 (struct cpl_t5_act_open_req6 *)skb->head; 327 328 INIT_TP_WR(req, 0); 329 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 330 qid_atid)); 331 req->local_port = csk->saddr6.sin6_port; 332 req->peer_port = csk->daddr6.sin6_port; 333 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 334 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 335 8); 336 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 337 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 338 8); 339 req->opt0 = cpu_to_be64(opt0); 340 341 opt2 |= T5_OPT_2_VALID_F; 342 req->opt2 = cpu_to_be32(opt2); 343 344 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 345 csk->cdev->ports[csk->port_id], 346 csk->l2t))); 347 } 348 349 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 350 351 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 352 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid, 353 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 354 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 355 csk->rss_qid); 356 357 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 358 } 359 #endif 360 361 static void send_close_req(struct cxgbi_sock *csk) 362 { 363 struct sk_buff *skb = csk->cpl_close; 364 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 365 unsigned int tid = csk->tid; 366 367 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 368 "csk 0x%p,%u,0x%lx, tid %u.\n", 369 csk, csk->state, csk->flags, csk->tid); 370 csk->cpl_close = NULL; 371 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 372 INIT_TP_WR(req, tid); 373 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 374 req->rsvd = 0; 375 376 cxgbi_sock_skb_entail(csk, skb); 377 if (csk->state >= CTP_ESTABLISHED) 378 push_tx_frames(csk, 1); 379 } 380 381 static void abort_arp_failure(void *handle, struct sk_buff *skb) 382 { 383 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 384 struct cpl_abort_req *req; 385 386 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 387 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 388 csk, csk->state, csk->flags, csk->tid); 389 req = (struct cpl_abort_req *)skb->data; 390 req->cmd = CPL_ABORT_NO_RST; 391 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 392 } 393 394 static void send_abort_req(struct cxgbi_sock *csk) 395 { 396 struct cpl_abort_req *req; 397 struct sk_buff *skb = csk->cpl_abort_req; 398 399 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 400 return; 401 402 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 403 send_tx_flowc_wr(csk); 404 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 405 } 406 407 cxgbi_sock_set_state(csk, CTP_ABORTING); 408 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 409 cxgbi_sock_purge_write_queue(csk); 410 411 csk->cpl_abort_req = NULL; 412 req = (struct cpl_abort_req *)skb->head; 413 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 414 req->cmd = CPL_ABORT_SEND_RST; 415 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 416 INIT_TP_WR(req, csk->tid); 417 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 418 req->rsvd0 = htonl(csk->snd_nxt); 419 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 420 421 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 422 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 423 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 424 req->rsvd1); 425 426 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 427 } 428 429 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 430 { 431 struct sk_buff *skb = csk->cpl_abort_rpl; 432 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 433 434 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 435 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 436 csk, csk->state, csk->flags, csk->tid, rst_status); 437 438 csk->cpl_abort_rpl = NULL; 439 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 440 INIT_TP_WR(rpl, csk->tid); 441 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 442 rpl->cmd = rst_status; 443 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 444 } 445 446 /* 447 * CPL connection rx data ack: host -> 448 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 449 * credits sent. 450 */ 451 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 452 { 453 struct sk_buff *skb; 454 struct cpl_rx_data_ack *req; 455 456 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 457 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 458 csk, csk->state, csk->flags, csk->tid, credits); 459 460 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 461 if (!skb) { 462 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 463 return 0; 464 } 465 req = (struct cpl_rx_data_ack *)skb->head; 466 467 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 468 INIT_TP_WR(req, csk->tid); 469 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 470 csk->tid)); 471 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) 472 | RX_FORCE_ACK_F); 473 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 474 return credits; 475 } 476 477 /* 478 * sgl_len - calculates the size of an SGL of the given capacity 479 * @n: the number of SGL entries 480 * Calculates the number of flits needed for a scatter/gather list that 481 * can hold the given number of entries. 482 */ 483 static inline unsigned int sgl_len(unsigned int n) 484 { 485 n--; 486 return (3 * n) / 2 + (n & 1) + 2; 487 } 488 489 /* 490 * calc_tx_flits_ofld - calculate # of flits for an offload packet 491 * @skb: the packet 492 * 493 * Returns the number of flits needed for the given offload packet. 494 * These packets are already fully constructed and no additional headers 495 * will be added. 496 */ 497 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 498 { 499 unsigned int flits, cnt; 500 501 if (is_ofld_imm(skb)) 502 return DIV_ROUND_UP(skb->len, 8); 503 flits = skb_transport_offset(skb) / 8; 504 cnt = skb_shinfo(skb)->nr_frags; 505 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 506 cnt++; 507 return flits + sgl_len(cnt); 508 } 509 510 #define FLOWC_WR_NPARAMS_MIN 9 511 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) 512 { 513 int nparams, flowclen16, flowclen; 514 515 nparams = FLOWC_WR_NPARAMS_MIN; 516 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 517 flowclen16 = DIV_ROUND_UP(flowclen, 16); 518 flowclen = flowclen16 * 16; 519 /* 520 * Return the number of 16-byte credits used by the FlowC request. 521 * Pass back the nparams and actual FlowC length if requested. 522 */ 523 if (nparamsp) 524 *nparamsp = nparams; 525 if (flowclenp) 526 *flowclenp = flowclen; 527 528 return flowclen16; 529 } 530 531 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) 532 { 533 struct sk_buff *skb; 534 struct fw_flowc_wr *flowc; 535 int nparams, flowclen16, flowclen; 536 537 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); 538 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 539 flowc = (struct fw_flowc_wr *)skb->head; 540 flowc->op_to_nparams = 541 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); 542 flowc->flowid_len16 = 543 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); 544 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 545 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 546 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 547 flowc->mnemval[1].val = htonl(csk->tx_chan); 548 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 549 flowc->mnemval[2].val = htonl(csk->tx_chan); 550 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 551 flowc->mnemval[3].val = htonl(csk->rss_qid); 552 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 553 flowc->mnemval[4].val = htonl(csk->snd_nxt); 554 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 555 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 556 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 557 flowc->mnemval[6].val = htonl(csk->snd_win); 558 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 559 flowc->mnemval[7].val = htonl(csk->advmss); 560 flowc->mnemval[8].mnemonic = 0; 561 flowc->mnemval[8].val = 0; 562 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 563 flowc->mnemval[8].val = 16384; 564 565 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 566 567 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 568 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 569 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 570 csk->snd_nxt, csk->rcv_nxt, csk->snd_win, 571 csk->advmss); 572 573 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 574 575 return flowclen16; 576 } 577 578 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 579 int dlen, int len, u32 credits, int compl) 580 { 581 struct fw_ofld_tx_data_wr *req; 582 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 583 unsigned int wr_ulp_mode = 0, val; 584 bool imm = is_ofld_imm(skb); 585 586 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 587 588 if (imm) { 589 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 590 FW_WR_COMPL_F | 591 FW_WR_IMMDLEN_V(dlen)); 592 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | 593 FW_WR_LEN16_V(credits)); 594 } else { 595 req->op_to_immdlen = 596 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 597 FW_WR_COMPL_F | 598 FW_WR_IMMDLEN_V(0)); 599 req->flowid_len16 = 600 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | 601 FW_WR_LEN16_V(credits)); 602 } 603 if (submode) 604 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | 605 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); 606 val = skb_peek(&csk->write_queue) ? 0 : 1; 607 req->tunnel_to_proxy = htonl(wr_ulp_mode | 608 FW_OFLD_TX_DATA_WR_SHOVE_V(val)); 609 req->plen = htonl(len); 610 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 611 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 612 } 613 614 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 615 { 616 kfree_skb(skb); 617 } 618 619 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 620 { 621 int total_size = 0; 622 struct sk_buff *skb; 623 624 if (unlikely(csk->state < CTP_ESTABLISHED || 625 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 626 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 627 1 << CXGBI_DBG_PDU_TX, 628 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 629 csk, csk->state, csk->flags, csk->tid); 630 return 0; 631 } 632 633 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 634 int dlen = skb->len; 635 int len = skb->len; 636 unsigned int credits_needed; 637 int flowclen16 = 0; 638 639 skb_reset_transport_header(skb); 640 if (is_ofld_imm(skb)) 641 credits_needed = DIV_ROUND_UP(dlen, 16); 642 else 643 credits_needed = DIV_ROUND_UP( 644 8 * calc_tx_flits_ofld(skb), 645 16); 646 647 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 648 credits_needed += DIV_ROUND_UP( 649 sizeof(struct fw_ofld_tx_data_wr), 650 16); 651 652 /* 653 * Assumes the initial credits is large enough to support 654 * fw_flowc_wr plus largest possible first payload 655 */ 656 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 657 flowclen16 = send_tx_flowc_wr(csk); 658 csk->wr_cred -= flowclen16; 659 csk->wr_una_cred += flowclen16; 660 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 661 } 662 663 if (csk->wr_cred < credits_needed) { 664 log_debug(1 << CXGBI_DBG_PDU_TX, 665 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 666 csk, skb->len, skb->data_len, 667 credits_needed, csk->wr_cred); 668 break; 669 } 670 __skb_unlink(skb, &csk->write_queue); 671 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 672 skb->csum = credits_needed + flowclen16; 673 csk->wr_cred -= credits_needed; 674 csk->wr_una_cred += credits_needed; 675 cxgbi_sock_enqueue_wr(csk, skb); 676 677 log_debug(1 << CXGBI_DBG_PDU_TX, 678 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 679 csk, skb->len, skb->data_len, credits_needed, 680 csk->wr_cred, csk->wr_una_cred); 681 682 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 683 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 684 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 685 req_completion); 686 csk->snd_nxt += len; 687 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 688 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) && 689 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) { 690 struct cpl_close_con_req *req = 691 (struct cpl_close_con_req *)skb->data; 692 req->wr.wr_hi |= htonl(FW_WR_COMPL_F); 693 } 694 total_size += skb->truesize; 695 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 696 697 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 698 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 699 csk, csk->state, csk->flags, csk->tid, skb, len); 700 701 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 702 } 703 return total_size; 704 } 705 706 static inline void free_atid(struct cxgbi_sock *csk) 707 { 708 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 709 710 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 711 cxgb4_free_atid(lldi->tids, csk->atid); 712 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 713 cxgbi_sock_put(csk); 714 } 715 } 716 717 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 718 { 719 struct cxgbi_sock *csk; 720 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 721 unsigned short tcp_opt = ntohs(req->tcp_opt); 722 unsigned int tid = GET_TID(req); 723 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 724 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 725 struct tid_info *t = lldi->tids; 726 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 727 728 csk = lookup_atid(t, atid); 729 if (unlikely(!csk)) { 730 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 731 goto rel_skb; 732 } 733 734 if (csk->atid != atid) { 735 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 736 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 737 goto rel_skb; 738 } 739 740 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 741 (&csk->saddr), (&csk->daddr), 742 atid, tid, csk, csk->state, csk->flags, rcv_isn); 743 744 module_put(THIS_MODULE); 745 746 cxgbi_sock_get(csk); 747 csk->tid = tid; 748 cxgb4_insert_tid(lldi->tids, csk, tid); 749 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 750 751 free_atid(csk); 752 753 spin_lock_bh(&csk->lock); 754 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 755 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 756 csk, csk->state, csk->flags, csk->tid); 757 758 if (csk->retry_timer.function) { 759 del_timer(&csk->retry_timer); 760 csk->retry_timer.function = NULL; 761 } 762 763 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 764 /* 765 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 766 * pass through opt0. 767 */ 768 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) 769 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); 770 771 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 772 if (TCPOPT_TSTAMP_G(tcp_opt)) 773 csk->advmss -= 12; 774 if (csk->advmss < 128) 775 csk->advmss = 128; 776 777 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 778 "csk 0x%p, mss_idx %u, advmss %u.\n", 779 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 780 781 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 782 783 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 784 send_abort_req(csk); 785 else { 786 if (skb_queue_len(&csk->write_queue)) 787 push_tx_frames(csk, 0); 788 cxgbi_conn_tx_open(csk); 789 } 790 spin_unlock_bh(&csk->lock); 791 792 rel_skb: 793 __kfree_skb(skb); 794 } 795 796 static int act_open_rpl_status_to_errno(int status) 797 { 798 switch (status) { 799 case CPL_ERR_CONN_RESET: 800 return -ECONNREFUSED; 801 case CPL_ERR_ARP_MISS: 802 return -EHOSTUNREACH; 803 case CPL_ERR_CONN_TIMEDOUT: 804 return -ETIMEDOUT; 805 case CPL_ERR_TCAM_FULL: 806 return -ENOMEM; 807 case CPL_ERR_CONN_EXIST: 808 return -EADDRINUSE; 809 default: 810 return -EIO; 811 } 812 } 813 814 static void csk_act_open_retry_timer(unsigned long data) 815 { 816 struct sk_buff *skb = NULL; 817 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 818 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 819 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 820 struct l2t_entry *); 821 int t4 = is_t4(lldi->adapter_type), size, size6; 822 823 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 824 "csk 0x%p,%u,0x%lx,%u.\n", 825 csk, csk->state, csk->flags, csk->tid); 826 827 cxgbi_sock_get(csk); 828 spin_lock_bh(&csk->lock); 829 830 if (t4) { 831 size = sizeof(struct cpl_act_open_req); 832 size6 = sizeof(struct cpl_act_open_req6); 833 } else { 834 size = sizeof(struct cpl_t5_act_open_req); 835 size6 = sizeof(struct cpl_t5_act_open_req6); 836 } 837 838 if (csk->csk_family == AF_INET) { 839 send_act_open_func = send_act_open_req; 840 skb = alloc_wr(size, 0, GFP_ATOMIC); 841 #if IS_ENABLED(CONFIG_IPV6) 842 } else { 843 send_act_open_func = send_act_open_req6; 844 skb = alloc_wr(size6, 0, GFP_ATOMIC); 845 #endif 846 } 847 848 if (!skb) 849 cxgbi_sock_fail_act_open(csk, -ENOMEM); 850 else { 851 skb->sk = (struct sock *)csk; 852 t4_set_arp_err_handler(skb, csk, 853 cxgbi_sock_act_open_req_arp_failure); 854 send_act_open_func(csk, skb, csk->l2t); 855 } 856 857 spin_unlock_bh(&csk->lock); 858 cxgbi_sock_put(csk); 859 860 } 861 862 static inline bool is_neg_adv(unsigned int status) 863 { 864 return status == CPL_ERR_RTX_NEG_ADVICE || 865 status == CPL_ERR_KEEPALV_NEG_ADVICE || 866 status == CPL_ERR_PERSIST_NEG_ADVICE; 867 } 868 869 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 870 { 871 struct cxgbi_sock *csk; 872 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 873 unsigned int tid = GET_TID(rpl); 874 unsigned int atid = 875 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 876 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 877 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 878 struct tid_info *t = lldi->tids; 879 880 csk = lookup_atid(t, atid); 881 if (unlikely(!csk)) { 882 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 883 goto rel_skb; 884 } 885 886 pr_info_ipaddr("tid %u/%u, status %u.\n" 887 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 888 atid, tid, status, csk, csk->state, csk->flags); 889 890 if (is_neg_adv(status)) 891 goto rel_skb; 892 893 module_put(THIS_MODULE); 894 895 if (status && status != CPL_ERR_TCAM_FULL && 896 status != CPL_ERR_CONN_EXIST && 897 status != CPL_ERR_ARP_MISS) 898 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 899 900 cxgbi_sock_get(csk); 901 spin_lock_bh(&csk->lock); 902 903 if (status == CPL_ERR_CONN_EXIST && 904 csk->retry_timer.function != csk_act_open_retry_timer) { 905 csk->retry_timer.function = csk_act_open_retry_timer; 906 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 907 } else 908 cxgbi_sock_fail_act_open(csk, 909 act_open_rpl_status_to_errno(status)); 910 911 spin_unlock_bh(&csk->lock); 912 cxgbi_sock_put(csk); 913 rel_skb: 914 __kfree_skb(skb); 915 } 916 917 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 918 { 919 struct cxgbi_sock *csk; 920 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 921 unsigned int tid = GET_TID(req); 922 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 923 struct tid_info *t = lldi->tids; 924 925 csk = lookup_tid(t, tid); 926 if (unlikely(!csk)) { 927 pr_err("can't find connection for tid %u.\n", tid); 928 goto rel_skb; 929 } 930 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 931 (&csk->saddr), (&csk->daddr), 932 csk, csk->state, csk->flags, csk->tid); 933 cxgbi_sock_rcv_peer_close(csk); 934 rel_skb: 935 __kfree_skb(skb); 936 } 937 938 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 939 { 940 struct cxgbi_sock *csk; 941 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 942 unsigned int tid = GET_TID(rpl); 943 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 944 struct tid_info *t = lldi->tids; 945 946 csk = lookup_tid(t, tid); 947 if (unlikely(!csk)) { 948 pr_err("can't find connection for tid %u.\n", tid); 949 goto rel_skb; 950 } 951 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 952 (&csk->saddr), (&csk->daddr), 953 csk, csk->state, csk->flags, csk->tid); 954 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 955 rel_skb: 956 __kfree_skb(skb); 957 } 958 959 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 960 int *need_rst) 961 { 962 switch (abort_reason) { 963 case CPL_ERR_BAD_SYN: /* fall through */ 964 case CPL_ERR_CONN_RESET: 965 return csk->state > CTP_ESTABLISHED ? 966 -EPIPE : -ECONNRESET; 967 case CPL_ERR_XMIT_TIMEDOUT: 968 case CPL_ERR_PERSIST_TIMEDOUT: 969 case CPL_ERR_FINWAIT2_TIMEDOUT: 970 case CPL_ERR_KEEPALIVE_TIMEDOUT: 971 return -ETIMEDOUT; 972 default: 973 return -EIO; 974 } 975 } 976 977 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 978 { 979 struct cxgbi_sock *csk; 980 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 981 unsigned int tid = GET_TID(req); 982 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 983 struct tid_info *t = lldi->tids; 984 int rst_status = CPL_ABORT_NO_RST; 985 986 csk = lookup_tid(t, tid); 987 if (unlikely(!csk)) { 988 pr_err("can't find connection for tid %u.\n", tid); 989 goto rel_skb; 990 } 991 992 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 993 (&csk->saddr), (&csk->daddr), 994 csk, csk->state, csk->flags, csk->tid, req->status); 995 996 if (is_neg_adv(req->status)) 997 goto rel_skb; 998 999 cxgbi_sock_get(csk); 1000 spin_lock_bh(&csk->lock); 1001 1002 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 1003 1004 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 1005 send_tx_flowc_wr(csk); 1006 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 1007 } 1008 1009 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 1010 cxgbi_sock_set_state(csk, CTP_ABORTING); 1011 1012 send_abort_rpl(csk, rst_status); 1013 1014 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1015 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1016 cxgbi_sock_closed(csk); 1017 } 1018 1019 spin_unlock_bh(&csk->lock); 1020 cxgbi_sock_put(csk); 1021 rel_skb: 1022 __kfree_skb(skb); 1023 } 1024 1025 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1026 { 1027 struct cxgbi_sock *csk; 1028 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1029 unsigned int tid = GET_TID(rpl); 1030 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1031 struct tid_info *t = lldi->tids; 1032 1033 csk = lookup_tid(t, tid); 1034 if (!csk) 1035 goto rel_skb; 1036 1037 if (csk) 1038 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1039 (&csk->saddr), (&csk->daddr), csk, 1040 csk->state, csk->flags, csk->tid, rpl->status); 1041 1042 if (rpl->status == CPL_ERR_ABORT_FAILED) 1043 goto rel_skb; 1044 1045 cxgbi_sock_rcv_abort_rpl(csk); 1046 rel_skb: 1047 __kfree_skb(skb); 1048 } 1049 1050 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1051 { 1052 struct cxgbi_sock *csk; 1053 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1054 unsigned int tid = GET_TID(cpl); 1055 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1056 struct tid_info *t = lldi->tids; 1057 1058 csk = lookup_tid(t, tid); 1059 if (!csk) { 1060 pr_err("can't find connection for tid %u.\n", tid); 1061 } else { 1062 /* not expecting this, reset the connection. */ 1063 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1064 spin_lock_bh(&csk->lock); 1065 send_abort_req(csk); 1066 spin_unlock_bh(&csk->lock); 1067 } 1068 __kfree_skb(skb); 1069 } 1070 1071 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1072 { 1073 struct cxgbi_sock *csk; 1074 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1075 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1076 unsigned int tid = GET_TID(cpl); 1077 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1078 struct tid_info *t = lldi->tids; 1079 1080 csk = lookup_tid(t, tid); 1081 if (unlikely(!csk)) { 1082 pr_err("can't find conn. for tid %u.\n", tid); 1083 goto rel_skb; 1084 } 1085 1086 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1087 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1088 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1089 pdu_len_ddp); 1090 1091 spin_lock_bh(&csk->lock); 1092 1093 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1094 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1095 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1096 csk, csk->state, csk->flags, csk->tid); 1097 if (csk->state != CTP_ABORTING) 1098 goto abort_conn; 1099 else 1100 goto discard; 1101 } 1102 1103 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1104 cxgbi_skcb_flags(skb) = 0; 1105 1106 skb_reset_transport_header(skb); 1107 __skb_pull(skb, sizeof(*cpl)); 1108 __pskb_trim(skb, ntohs(cpl->len)); 1109 1110 if (!csk->skb_ulp_lhdr) { 1111 unsigned char *bhs; 1112 unsigned int hlen, dlen, plen; 1113 1114 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1115 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1116 csk, csk->state, csk->flags, csk->tid, skb); 1117 csk->skb_ulp_lhdr = skb; 1118 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1119 1120 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1121 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1122 csk->tid, cxgbi_skcb_tcp_seq(skb), 1123 csk->rcv_nxt); 1124 goto abort_conn; 1125 } 1126 1127 bhs = skb->data; 1128 hlen = ntohs(cpl->len); 1129 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1130 1131 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1132 if (is_t4(lldi->adapter_type)) 1133 plen -= 40; 1134 1135 if ((hlen + dlen) != plen) { 1136 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1137 "mismatch %u != %u + %u, seq 0x%x.\n", 1138 csk->tid, plen, hlen, dlen, 1139 cxgbi_skcb_tcp_seq(skb)); 1140 goto abort_conn; 1141 } 1142 1143 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1144 if (dlen) 1145 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1146 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1147 1148 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1149 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1150 csk, skb, *bhs, hlen, dlen, 1151 ntohl(*((unsigned int *)(bhs + 16))), 1152 ntohl(*((unsigned int *)(bhs + 24)))); 1153 1154 } else { 1155 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1156 1157 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1158 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1159 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1160 csk, csk->state, csk->flags, skb, lskb); 1161 } 1162 1163 __skb_queue_tail(&csk->receive_queue, skb); 1164 spin_unlock_bh(&csk->lock); 1165 return; 1166 1167 abort_conn: 1168 send_abort_req(csk); 1169 discard: 1170 spin_unlock_bh(&csk->lock); 1171 rel_skb: 1172 __kfree_skb(skb); 1173 } 1174 1175 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1176 struct sk_buff *skb) 1177 { 1178 struct cxgbi_sock *csk; 1179 struct sk_buff *lskb; 1180 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1181 unsigned int tid = GET_TID(rpl); 1182 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1183 struct tid_info *t = lldi->tids; 1184 unsigned int status = ntohl(rpl->ddpvld); 1185 1186 csk = lookup_tid(t, tid); 1187 if (unlikely(!csk)) { 1188 pr_err("can't find connection for tid %u.\n", tid); 1189 goto rel_skb; 1190 } 1191 1192 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1193 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1194 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1195 1196 spin_lock_bh(&csk->lock); 1197 1198 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1199 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1200 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1201 csk, csk->state, csk->flags, csk->tid); 1202 if (csk->state != CTP_ABORTING) 1203 goto abort_conn; 1204 else 1205 goto discard; 1206 } 1207 1208 if (!csk->skb_ulp_lhdr) { 1209 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1210 goto abort_conn; 1211 } 1212 1213 lskb = csk->skb_ulp_lhdr; 1214 csk->skb_ulp_lhdr = NULL; 1215 1216 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1217 1218 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1219 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1220 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1221 1222 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1223 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1224 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1225 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1226 } 1227 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1228 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1229 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1230 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1231 } 1232 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1233 log_debug(1 << CXGBI_DBG_PDU_RX, 1234 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1235 csk, lskb, status); 1236 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1237 } 1238 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1239 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1240 log_debug(1 << CXGBI_DBG_PDU_RX, 1241 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1242 csk, lskb, status); 1243 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1244 } 1245 log_debug(1 << CXGBI_DBG_PDU_RX, 1246 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1247 csk, lskb, cxgbi_skcb_flags(lskb)); 1248 1249 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1250 cxgbi_conn_pdu_ready(csk); 1251 spin_unlock_bh(&csk->lock); 1252 goto rel_skb; 1253 1254 abort_conn: 1255 send_abort_req(csk); 1256 discard: 1257 spin_unlock_bh(&csk->lock); 1258 rel_skb: 1259 __kfree_skb(skb); 1260 } 1261 1262 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1263 { 1264 struct cxgbi_sock *csk; 1265 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1266 unsigned int tid = GET_TID(rpl); 1267 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1268 struct tid_info *t = lldi->tids; 1269 1270 csk = lookup_tid(t, tid); 1271 if (unlikely(!csk)) 1272 pr_err("can't find connection for tid %u.\n", tid); 1273 else { 1274 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1275 "csk 0x%p,%u,0x%lx,%u.\n", 1276 csk, csk->state, csk->flags, csk->tid); 1277 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1278 rpl->seq_vld); 1279 } 1280 __kfree_skb(skb); 1281 } 1282 1283 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1284 { 1285 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1286 unsigned int tid = GET_TID(rpl); 1287 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1288 struct tid_info *t = lldi->tids; 1289 struct cxgbi_sock *csk; 1290 1291 csk = lookup_tid(t, tid); 1292 if (!csk) 1293 pr_err("can't find conn. for tid %u.\n", tid); 1294 1295 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1296 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1297 csk, csk->state, csk->flags, csk->tid, rpl->status); 1298 1299 if (rpl->status != CPL_ERR_NONE) 1300 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1301 csk, tid, rpl->status); 1302 1303 __kfree_skb(skb); 1304 } 1305 1306 static int alloc_cpls(struct cxgbi_sock *csk) 1307 { 1308 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1309 0, GFP_KERNEL); 1310 if (!csk->cpl_close) 1311 return -ENOMEM; 1312 1313 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1314 0, GFP_KERNEL); 1315 if (!csk->cpl_abort_req) 1316 goto free_cpls; 1317 1318 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1319 0, GFP_KERNEL); 1320 if (!csk->cpl_abort_rpl) 1321 goto free_cpls; 1322 return 0; 1323 1324 free_cpls: 1325 cxgbi_sock_free_cpl_skbs(csk); 1326 return -ENOMEM; 1327 } 1328 1329 static inline void l2t_put(struct cxgbi_sock *csk) 1330 { 1331 if (csk->l2t) { 1332 cxgb4_l2t_release(csk->l2t); 1333 csk->l2t = NULL; 1334 cxgbi_sock_put(csk); 1335 } 1336 } 1337 1338 static void release_offload_resources(struct cxgbi_sock *csk) 1339 { 1340 struct cxgb4_lld_info *lldi; 1341 #if IS_ENABLED(CONFIG_IPV6) 1342 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1343 #endif 1344 1345 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1346 "csk 0x%p,%u,0x%lx,%u.\n", 1347 csk, csk->state, csk->flags, csk->tid); 1348 1349 cxgbi_sock_free_cpl_skbs(csk); 1350 if (csk->wr_cred != csk->wr_max_cred) { 1351 cxgbi_sock_purge_wr_queue(csk); 1352 cxgbi_sock_reset_wr_list(csk); 1353 } 1354 1355 l2t_put(csk); 1356 #if IS_ENABLED(CONFIG_IPV6) 1357 if (csk->csk_family == AF_INET6) 1358 cxgb4_clip_release(ndev, 1359 (const u32 *)&csk->saddr6.sin6_addr, 1); 1360 #endif 1361 1362 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1363 free_atid(csk); 1364 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1365 lldi = cxgbi_cdev_priv(csk->cdev); 1366 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1367 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1368 cxgbi_sock_put(csk); 1369 } 1370 csk->dst = NULL; 1371 csk->cdev = NULL; 1372 } 1373 1374 static int init_act_open(struct cxgbi_sock *csk) 1375 { 1376 struct cxgbi_device *cdev = csk->cdev; 1377 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1378 struct net_device *ndev = cdev->ports[csk->port_id]; 1379 struct sk_buff *skb = NULL; 1380 struct neighbour *n = NULL; 1381 void *daddr; 1382 unsigned int step; 1383 unsigned int size, size6; 1384 int t4 = is_t4(lldi->adapter_type); 1385 unsigned int linkspeed; 1386 unsigned int rcv_winf, snd_winf; 1387 1388 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1389 "csk 0x%p,%u,0x%lx,%u.\n", 1390 csk, csk->state, csk->flags, csk->tid); 1391 1392 if (csk->csk_family == AF_INET) 1393 daddr = &csk->daddr.sin_addr.s_addr; 1394 #if IS_ENABLED(CONFIG_IPV6) 1395 else if (csk->csk_family == AF_INET6) 1396 daddr = &csk->daddr6.sin6_addr; 1397 #endif 1398 else { 1399 pr_err("address family 0x%x not supported\n", csk->csk_family); 1400 goto rel_resource; 1401 } 1402 1403 n = dst_neigh_lookup(csk->dst, daddr); 1404 1405 if (!n) { 1406 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1407 goto rel_resource; 1408 } 1409 1410 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1411 if (csk->atid < 0) { 1412 pr_err("%s, NO atid available.\n", ndev->name); 1413 return -EINVAL; 1414 } 1415 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1416 cxgbi_sock_get(csk); 1417 1418 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1419 if (!csk->l2t) { 1420 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1421 goto rel_resource_without_clip; 1422 } 1423 cxgbi_sock_get(csk); 1424 1425 #if IS_ENABLED(CONFIG_IPV6) 1426 if (csk->csk_family == AF_INET6) 1427 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1428 #endif 1429 1430 if (t4) { 1431 size = sizeof(struct cpl_act_open_req); 1432 size6 = sizeof(struct cpl_act_open_req6); 1433 } else { 1434 size = sizeof(struct cpl_t5_act_open_req); 1435 size6 = sizeof(struct cpl_t5_act_open_req6); 1436 } 1437 1438 if (csk->csk_family == AF_INET) 1439 skb = alloc_wr(size, 0, GFP_NOIO); 1440 #if IS_ENABLED(CONFIG_IPV6) 1441 else 1442 skb = alloc_wr(size6, 0, GFP_NOIO); 1443 #endif 1444 1445 if (!skb) 1446 goto rel_resource; 1447 skb->sk = (struct sock *)csk; 1448 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1449 1450 if (!csk->mtu) 1451 csk->mtu = dst_mtu(csk->dst); 1452 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1453 csk->tx_chan = cxgb4_port_chan(ndev); 1454 /* SMT two entries per row */ 1455 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1456 step = lldi->ntxq / lldi->nchan; 1457 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1458 step = lldi->nrxq / lldi->nchan; 1459 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1460 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; 1461 csk->snd_win = cxgb4i_snd_win; 1462 csk->rcv_win = cxgb4i_rcv_win; 1463 if (cxgb4i_rcv_win <= 0) { 1464 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; 1465 rcv_winf = linkspeed / SPEED_10000; 1466 if (rcv_winf) 1467 csk->rcv_win *= rcv_winf; 1468 } 1469 if (cxgb4i_snd_win <= 0) { 1470 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; 1471 snd_winf = linkspeed / SPEED_10000; 1472 if (snd_winf) 1473 csk->snd_win *= snd_winf; 1474 } 1475 csk->wr_cred = lldi->wr_cred - 1476 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1477 csk->wr_max_cred = csk->wr_cred; 1478 csk->wr_una_cred = 0; 1479 cxgbi_sock_reset_wr_list(csk); 1480 csk->err = 0; 1481 1482 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1483 (&csk->saddr), (&csk->daddr), csk, csk->state, 1484 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1485 csk->mtu, csk->mss_idx, csk->smac_idx); 1486 1487 /* must wait for either a act_open_rpl or act_open_establish */ 1488 try_module_get(THIS_MODULE); 1489 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1490 if (csk->csk_family == AF_INET) 1491 send_act_open_req(csk, skb, csk->l2t); 1492 #if IS_ENABLED(CONFIG_IPV6) 1493 else 1494 send_act_open_req6(csk, skb, csk->l2t); 1495 #endif 1496 neigh_release(n); 1497 1498 return 0; 1499 1500 rel_resource: 1501 #if IS_ENABLED(CONFIG_IPV6) 1502 if (csk->csk_family == AF_INET6) 1503 cxgb4_clip_release(ndev, 1504 (const u32 *)&csk->saddr6.sin6_addr, 1); 1505 #endif 1506 rel_resource_without_clip: 1507 if (n) 1508 neigh_release(n); 1509 if (skb) 1510 __kfree_skb(skb); 1511 return -EINVAL; 1512 } 1513 1514 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1515 [CPL_ACT_ESTABLISH] = do_act_establish, 1516 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1517 [CPL_PEER_CLOSE] = do_peer_close, 1518 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1519 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1520 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1521 [CPL_FW4_ACK] = do_fw4_ack, 1522 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1523 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1524 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1525 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1526 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1527 [CPL_RX_DATA] = do_rx_data, 1528 }; 1529 1530 static int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1531 { 1532 int rc; 1533 1534 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1535 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1536 1537 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1538 cxgb4i_max_connect); 1539 if (rc < 0) 1540 return rc; 1541 1542 cdev->csk_release_offload_resources = release_offload_resources; 1543 cdev->csk_push_tx_frames = push_tx_frames; 1544 cdev->csk_send_abort_req = send_abort_req; 1545 cdev->csk_send_close_req = send_close_req; 1546 cdev->csk_send_rx_credits = send_rx_credits; 1547 cdev->csk_alloc_cpls = alloc_cpls; 1548 cdev->csk_init_act_open = init_act_open; 1549 1550 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1551 return 0; 1552 } 1553 1554 static inline void 1555 ulp_mem_io_set_hdr(struct cxgbi_device *cdev, 1556 struct ulp_mem_io *req, 1557 unsigned int wr_len, unsigned int dlen, 1558 unsigned int pm_addr, 1559 int tid) 1560 { 1561 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1562 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1563 1564 INIT_ULPTX_WR(req, wr_len, 0, tid); 1565 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | 1566 FW_WR_ATOMIC_V(0)); 1567 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1568 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | 1569 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); 1570 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1571 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1572 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1573 1574 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1575 idata->len = htonl(dlen); 1576 } 1577 1578 static struct sk_buff * 1579 ddp_ppod_init_idata(struct cxgbi_device *cdev, 1580 struct cxgbi_ppm *ppm, 1581 unsigned int idx, unsigned int npods, 1582 unsigned int tid) 1583 { 1584 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1585 unsigned int dlen = npods << PPOD_SIZE_SHIFT; 1586 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1587 sizeof(struct ulptx_idata) + dlen, 16); 1588 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1589 1590 if (!skb) { 1591 pr_err("%s: %s idx %u, npods %u, OOM.\n", 1592 __func__, ppm->ndev->name, idx, npods); 1593 return NULL; 1594 } 1595 1596 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, 1597 pm_addr, tid); 1598 1599 return skb; 1600 } 1601 1602 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1603 struct cxgbi_task_tag_info *ttinfo, 1604 unsigned int idx, unsigned int npods, 1605 struct scatterlist **sg_pp, 1606 unsigned int *sg_off) 1607 { 1608 struct cxgbi_device *cdev = csk->cdev; 1609 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, 1610 csk->tid); 1611 struct ulp_mem_io *req; 1612 struct ulptx_idata *idata; 1613 struct cxgbi_pagepod *ppod; 1614 int i; 1615 1616 if (!skb) 1617 return -ENOMEM; 1618 1619 req = (struct ulp_mem_io *)skb->head; 1620 idata = (struct ulptx_idata *)(req + 1); 1621 ppod = (struct cxgbi_pagepod *)(idata + 1); 1622 1623 for (i = 0; i < npods; i++, ppod++) 1624 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); 1625 1626 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); 1627 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); 1628 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 1629 1630 spin_lock_bh(&csk->lock); 1631 cxgbi_sock_skb_entail(csk, skb); 1632 spin_unlock_bh(&csk->lock); 1633 1634 return 0; 1635 } 1636 1637 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1638 struct cxgbi_task_tag_info *ttinfo) 1639 { 1640 unsigned int pidx = ttinfo->idx; 1641 unsigned int npods = ttinfo->npods; 1642 unsigned int i, cnt; 1643 int err = 0; 1644 struct scatterlist *sg = ttinfo->sgl; 1645 unsigned int offset = 0; 1646 1647 ttinfo->cid = csk->port_id; 1648 1649 for (i = 0; i < npods; i += cnt, pidx += cnt) { 1650 cnt = npods - i; 1651 1652 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1653 cnt = ULPMEM_IDATA_MAX_NPPODS; 1654 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, 1655 &sg, &offset); 1656 if (err < 0) 1657 break; 1658 } 1659 1660 return err; 1661 } 1662 1663 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1664 int pg_idx, bool reply) 1665 { 1666 struct sk_buff *skb; 1667 struct cpl_set_tcb_field *req; 1668 1669 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1670 return 0; 1671 1672 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1673 if (!skb) 1674 return -ENOMEM; 1675 1676 /* set up ulp page size */ 1677 req = (struct cpl_set_tcb_field *)skb->head; 1678 INIT_TP_WR(req, csk->tid); 1679 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1680 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1681 req->word_cookie = htons(0); 1682 req->mask = cpu_to_be64(0x3 << 8); 1683 req->val = cpu_to_be64(pg_idx << 8); 1684 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1685 1686 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1687 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1688 1689 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1690 return 0; 1691 } 1692 1693 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1694 int hcrc, int dcrc, int reply) 1695 { 1696 struct sk_buff *skb; 1697 struct cpl_set_tcb_field *req; 1698 1699 if (!hcrc && !dcrc) 1700 return 0; 1701 1702 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1703 if (!skb) 1704 return -ENOMEM; 1705 1706 csk->hcrc_len = (hcrc ? 4 : 0); 1707 csk->dcrc_len = (dcrc ? 4 : 0); 1708 /* set up ulp submode */ 1709 req = (struct cpl_set_tcb_field *)skb->head; 1710 INIT_TP_WR(req, tid); 1711 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1712 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1713 req->word_cookie = htons(0); 1714 req->mask = cpu_to_be64(0x3 << 4); 1715 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1716 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1717 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1718 1719 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1720 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1721 1722 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1723 return 0; 1724 } 1725 1726 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) 1727 { 1728 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) 1729 (cxgbi_cdev_priv(cdev)))->iscsi_ppm); 1730 } 1731 1732 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1733 { 1734 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1735 struct net_device *ndev = cdev->ports[0]; 1736 struct cxgbi_tag_format tformat; 1737 unsigned int ppmax; 1738 int i; 1739 1740 if (!lldi->vr->iscsi.size) { 1741 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); 1742 return -EACCES; 1743 } 1744 1745 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; 1746 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; 1747 1748 memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); 1749 for (i = 0; i < 4; i++) 1750 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) 1751 & 0xF; 1752 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); 1753 1754 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, 1755 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); 1756 1757 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1758 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1759 cdev->csk_ddp_set_map = ddp_set_map; 1760 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1761 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1762 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1763 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1764 cdev->cdev2ppm = cdev2ppm; 1765 1766 return 0; 1767 } 1768 1769 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1770 { 1771 struct cxgbi_device *cdev; 1772 struct port_info *pi; 1773 int i, rc; 1774 1775 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1776 if (!cdev) { 1777 pr_info("t4 device 0x%p, register failed.\n", lldi); 1778 return NULL; 1779 } 1780 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1781 cdev, lldi->adapter_type, lldi->nports, 1782 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1783 lldi->nrxq, lldi->wr_cred); 1784 for (i = 0; i < lldi->nrxq; i++) 1785 log_debug(1 << CXGBI_DBG_DEV, 1786 "t4 0x%p, rxq id #%d: %u.\n", 1787 cdev, i, lldi->rxq_ids[i]); 1788 1789 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1790 cdev->flags = CXGBI_FLAG_DEV_T4; 1791 cdev->pdev = lldi->pdev; 1792 cdev->ports = lldi->ports; 1793 cdev->nports = lldi->nports; 1794 cdev->mtus = lldi->mtus; 1795 cdev->nmtus = NMTUS; 1796 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1797 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1798 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1799 cdev->itp = &cxgb4i_iscsi_transport; 1800 1801 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 1802 << FW_VIID_PFN_S; 1803 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1804 cdev, lldi->ports[0]->name, cdev->pfvf); 1805 1806 rc = cxgb4i_ddp_init(cdev); 1807 if (rc) { 1808 pr_info("t4 0x%p ddp init failed.\n", cdev); 1809 goto err_out; 1810 } 1811 rc = cxgb4i_ofld_init(cdev); 1812 if (rc) { 1813 pr_info("t4 0x%p ofld init failed.\n", cdev); 1814 goto err_out; 1815 } 1816 1817 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1818 &cxgb4i_host_template, cxgb4i_stt); 1819 if (rc) 1820 goto err_out; 1821 1822 for (i = 0; i < cdev->nports; i++) { 1823 pi = netdev_priv(lldi->ports[i]); 1824 cdev->hbas[i]->port_id = pi->port_id; 1825 } 1826 return cdev; 1827 1828 err_out: 1829 cxgbi_device_unregister(cdev); 1830 return ERR_PTR(-ENOMEM); 1831 } 1832 1833 #define RX_PULL_LEN 128 1834 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1835 const struct pkt_gl *pgl) 1836 { 1837 const struct cpl_act_establish *rpl; 1838 struct sk_buff *skb; 1839 unsigned int opc; 1840 struct cxgbi_device *cdev = handle; 1841 1842 if (pgl == NULL) { 1843 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1844 1845 skb = alloc_wr(len, 0, GFP_ATOMIC); 1846 if (!skb) 1847 goto nomem; 1848 skb_copy_to_linear_data(skb, &rsp[1], len); 1849 } else { 1850 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1851 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1852 pgl->va, be64_to_cpu(*rsp), 1853 be64_to_cpu(*(u64 *)pgl->va), 1854 pgl->tot_len); 1855 return 0; 1856 } 1857 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1858 if (unlikely(!skb)) 1859 goto nomem; 1860 } 1861 1862 rpl = (struct cpl_act_establish *)skb->data; 1863 opc = rpl->ot.opcode; 1864 log_debug(1 << CXGBI_DBG_TOE, 1865 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1866 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1867 if (cxgb4i_cplhandlers[opc]) 1868 cxgb4i_cplhandlers[opc](cdev, skb); 1869 else { 1870 pr_err("No handler for opcode 0x%x.\n", opc); 1871 __kfree_skb(skb); 1872 } 1873 return 0; 1874 nomem: 1875 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1876 return 1; 1877 } 1878 1879 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1880 { 1881 struct cxgbi_device *cdev = handle; 1882 1883 switch (state) { 1884 case CXGB4_STATE_UP: 1885 pr_info("cdev 0x%p, UP.\n", cdev); 1886 break; 1887 case CXGB4_STATE_START_RECOVERY: 1888 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1889 /* close all connections */ 1890 break; 1891 case CXGB4_STATE_DOWN: 1892 pr_info("cdev 0x%p, DOWN.\n", cdev); 1893 break; 1894 case CXGB4_STATE_DETACH: 1895 pr_info("cdev 0x%p, DETACH.\n", cdev); 1896 cxgbi_device_unregister(cdev); 1897 break; 1898 default: 1899 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1900 break; 1901 } 1902 return 0; 1903 } 1904 1905 static int __init cxgb4i_init_module(void) 1906 { 1907 int rc; 1908 1909 printk(KERN_INFO "%s", version); 1910 1911 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1912 if (rc < 0) 1913 return rc; 1914 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1915 1916 return 0; 1917 } 1918 1919 static void __exit cxgb4i_exit_module(void) 1920 { 1921 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1922 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1923 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1924 } 1925 1926 module_init(cxgb4i_init_module); 1927 module_exit(cxgb4i_exit_module); 1928