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 .ntxq = MAX_ULD_QSETS, 89 .rxq_size = 1024, 90 .lro = false, 91 .add = t4_uld_add, 92 .rx_handler = t4_uld_rx_handler, 93 .state_change = t4_uld_state_change, 94 }; 95 96 static struct scsi_host_template cxgb4i_host_template = { 97 .module = THIS_MODULE, 98 .name = DRV_MODULE_NAME, 99 .proc_name = DRV_MODULE_NAME, 100 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 101 .queuecommand = iscsi_queuecommand, 102 .change_queue_depth = scsi_change_queue_depth, 103 .sg_tablesize = SG_ALL, 104 .max_sectors = 0xFFFF, 105 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 106 .eh_abort_handler = iscsi_eh_abort, 107 .eh_device_reset_handler = iscsi_eh_device_reset, 108 .eh_target_reset_handler = iscsi_eh_recover_target, 109 .target_alloc = iscsi_target_alloc, 110 .use_clustering = DISABLE_CLUSTERING, 111 .this_id = -1, 112 .track_queue_depth = 1, 113 }; 114 115 static struct iscsi_transport cxgb4i_iscsi_transport = { 116 .owner = THIS_MODULE, 117 .name = DRV_MODULE_NAME, 118 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 119 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 120 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 121 .attr_is_visible = cxgbi_attr_is_visible, 122 .get_host_param = cxgbi_get_host_param, 123 .set_host_param = cxgbi_set_host_param, 124 /* session management */ 125 .create_session = cxgbi_create_session, 126 .destroy_session = cxgbi_destroy_session, 127 .get_session_param = iscsi_session_get_param, 128 /* connection management */ 129 .create_conn = cxgbi_create_conn, 130 .bind_conn = cxgbi_bind_conn, 131 .destroy_conn = iscsi_tcp_conn_teardown, 132 .start_conn = iscsi_conn_start, 133 .stop_conn = iscsi_conn_stop, 134 .get_conn_param = iscsi_conn_get_param, 135 .set_param = cxgbi_set_conn_param, 136 .get_stats = cxgbi_get_conn_stats, 137 /* pdu xmit req from user space */ 138 .send_pdu = iscsi_conn_send_pdu, 139 /* task */ 140 .init_task = iscsi_tcp_task_init, 141 .xmit_task = iscsi_tcp_task_xmit, 142 .cleanup_task = cxgbi_cleanup_task, 143 /* pdu */ 144 .alloc_pdu = cxgbi_conn_alloc_pdu, 145 .init_pdu = cxgbi_conn_init_pdu, 146 .xmit_pdu = cxgbi_conn_xmit_pdu, 147 .parse_pdu_itt = cxgbi_parse_pdu_itt, 148 /* TCP connect/disconnect */ 149 .get_ep_param = cxgbi_get_ep_param, 150 .ep_connect = cxgbi_ep_connect, 151 .ep_poll = cxgbi_ep_poll, 152 .ep_disconnect = cxgbi_ep_disconnect, 153 /* Error recovery timeout call */ 154 .session_recovery_timedout = iscsi_session_recovery_timedout, 155 }; 156 157 static struct scsi_transport_template *cxgb4i_stt; 158 159 /* 160 * CPL (Chelsio Protocol Language) defines a message passing interface between 161 * the host driver and Chelsio asic. 162 * The section below implments CPLs that related to iscsi tcp connection 163 * open/close/abort and data send/receive. 164 */ 165 166 #define RCV_BUFSIZ_MASK 0x3FFU 167 #define MAX_IMM_TX_PKT_LEN 256 168 169 static int push_tx_frames(struct cxgbi_sock *, int); 170 171 /* 172 * is_ofld_imm - check whether a packet can be sent as immediate data 173 * @skb: the packet 174 * 175 * Returns true if a packet can be sent as an offload WR with immediate 176 * data. We currently use the same limit as for Ethernet packets. 177 */ 178 static inline bool is_ofld_imm(const struct sk_buff *skb) 179 { 180 int len = skb->len; 181 182 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 183 len += sizeof(struct fw_ofld_tx_data_wr); 184 185 return len <= MAX_IMM_TX_PKT_LEN; 186 } 187 188 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 189 struct l2t_entry *e) 190 { 191 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 192 int t4 = is_t4(lldi->adapter_type); 193 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 194 unsigned long long opt0; 195 unsigned int opt2; 196 unsigned int qid_atid = ((unsigned int)csk->atid) | 197 (((unsigned int)csk->rss_qid) << 14); 198 199 opt0 = KEEP_ALIVE_F | 200 WND_SCALE_V(wscale) | 201 MSS_IDX_V(csk->mss_idx) | 202 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 203 TX_CHAN_V(csk->tx_chan) | 204 SMAC_SEL_V(csk->smac_idx) | 205 ULP_MODE_V(ULP_MODE_ISCSI) | 206 RCV_BUFSIZ_V(csk->rcv_win >> 10); 207 208 opt2 = RX_CHANNEL_V(0) | 209 RSS_QUEUE_VALID_F | 210 RSS_QUEUE_V(csk->rss_qid); 211 212 if (is_t4(lldi->adapter_type)) { 213 struct cpl_act_open_req *req = 214 (struct cpl_act_open_req *)skb->head; 215 216 INIT_TP_WR(req, 0); 217 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 218 qid_atid)); 219 req->local_port = csk->saddr.sin_port; 220 req->peer_port = csk->daddr.sin_port; 221 req->local_ip = csk->saddr.sin_addr.s_addr; 222 req->peer_ip = csk->daddr.sin_addr.s_addr; 223 req->opt0 = cpu_to_be64(opt0); 224 req->params = cpu_to_be32(cxgb4_select_ntuple( 225 csk->cdev->ports[csk->port_id], 226 csk->l2t)); 227 opt2 |= RX_FC_VALID_F; 228 req->opt2 = cpu_to_be32(opt2); 229 230 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 231 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 232 csk, &req->local_ip, ntohs(req->local_port), 233 &req->peer_ip, ntohs(req->peer_port), 234 csk->atid, csk->rss_qid); 235 } else { 236 struct cpl_t5_act_open_req *req = 237 (struct cpl_t5_act_open_req *)skb->head; 238 u32 isn = (prandom_u32() & ~7UL) - 1; 239 240 INIT_TP_WR(req, 0); 241 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 242 qid_atid)); 243 req->local_port = csk->saddr.sin_port; 244 req->peer_port = csk->daddr.sin_port; 245 req->local_ip = csk->saddr.sin_addr.s_addr; 246 req->peer_ip = csk->daddr.sin_addr.s_addr; 247 req->opt0 = cpu_to_be64(opt0); 248 req->params = cpu_to_be64(FILTER_TUPLE_V( 249 cxgb4_select_ntuple( 250 csk->cdev->ports[csk->port_id], 251 csk->l2t))); 252 req->rsvd = cpu_to_be32(isn); 253 opt2 |= T5_ISS_VALID; 254 opt2 |= T5_OPT_2_VALID_F; 255 256 req->opt2 = cpu_to_be32(opt2); 257 258 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 259 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 260 csk, &req->local_ip, ntohs(req->local_port), 261 &req->peer_ip, ntohs(req->peer_port), 262 csk->atid, csk->rss_qid); 263 } 264 265 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 266 267 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 268 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk, 269 csk->state, csk->flags, csk->atid, csk->rss_qid); 270 271 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 272 } 273 274 #if IS_ENABLED(CONFIG_IPV6) 275 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 276 struct l2t_entry *e) 277 { 278 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 279 int t4 = is_t4(lldi->adapter_type); 280 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 281 unsigned long long opt0; 282 unsigned int opt2; 283 unsigned int qid_atid = ((unsigned int)csk->atid) | 284 (((unsigned int)csk->rss_qid) << 14); 285 286 opt0 = KEEP_ALIVE_F | 287 WND_SCALE_V(wscale) | 288 MSS_IDX_V(csk->mss_idx) | 289 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 290 TX_CHAN_V(csk->tx_chan) | 291 SMAC_SEL_V(csk->smac_idx) | 292 ULP_MODE_V(ULP_MODE_ISCSI) | 293 RCV_BUFSIZ_V(csk->rcv_win >> 10); 294 295 opt2 = RX_CHANNEL_V(0) | 296 RSS_QUEUE_VALID_F | 297 RX_FC_DISABLE_F | 298 RSS_QUEUE_V(csk->rss_qid); 299 300 if (t4) { 301 struct cpl_act_open_req6 *req = 302 (struct cpl_act_open_req6 *)skb->head; 303 304 INIT_TP_WR(req, 0); 305 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 306 qid_atid)); 307 req->local_port = csk->saddr6.sin6_port; 308 req->peer_port = csk->daddr6.sin6_port; 309 310 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 311 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 312 8); 313 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 314 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 315 8); 316 317 req->opt0 = cpu_to_be64(opt0); 318 319 opt2 |= RX_FC_VALID_F; 320 req->opt2 = cpu_to_be32(opt2); 321 322 req->params = cpu_to_be32(cxgb4_select_ntuple( 323 csk->cdev->ports[csk->port_id], 324 csk->l2t)); 325 } else { 326 struct cpl_t5_act_open_req6 *req = 327 (struct cpl_t5_act_open_req6 *)skb->head; 328 329 INIT_TP_WR(req, 0); 330 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 331 qid_atid)); 332 req->local_port = csk->saddr6.sin6_port; 333 req->peer_port = csk->daddr6.sin6_port; 334 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 335 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 336 8); 337 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 338 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 339 8); 340 req->opt0 = cpu_to_be64(opt0); 341 342 opt2 |= T5_OPT_2_VALID_F; 343 req->opt2 = cpu_to_be32(opt2); 344 345 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 346 csk->cdev->ports[csk->port_id], 347 csk->l2t))); 348 } 349 350 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 351 352 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 353 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid, 354 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 355 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 356 csk->rss_qid); 357 358 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 359 } 360 #endif 361 362 static void send_close_req(struct cxgbi_sock *csk) 363 { 364 struct sk_buff *skb = csk->cpl_close; 365 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 366 unsigned int tid = csk->tid; 367 368 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 369 "csk 0x%p,%u,0x%lx, tid %u.\n", 370 csk, csk->state, csk->flags, csk->tid); 371 csk->cpl_close = NULL; 372 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 373 INIT_TP_WR(req, tid); 374 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 375 req->rsvd = 0; 376 377 cxgbi_sock_skb_entail(csk, skb); 378 if (csk->state >= CTP_ESTABLISHED) 379 push_tx_frames(csk, 1); 380 } 381 382 static void abort_arp_failure(void *handle, struct sk_buff *skb) 383 { 384 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 385 struct cpl_abort_req *req; 386 387 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 388 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 389 csk, csk->state, csk->flags, csk->tid); 390 req = (struct cpl_abort_req *)skb->data; 391 req->cmd = CPL_ABORT_NO_RST; 392 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 393 } 394 395 static void send_abort_req(struct cxgbi_sock *csk) 396 { 397 struct cpl_abort_req *req; 398 struct sk_buff *skb = csk->cpl_abort_req; 399 400 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 401 return; 402 403 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 404 send_tx_flowc_wr(csk); 405 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 406 } 407 408 cxgbi_sock_set_state(csk, CTP_ABORTING); 409 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 410 cxgbi_sock_purge_write_queue(csk); 411 412 csk->cpl_abort_req = NULL; 413 req = (struct cpl_abort_req *)skb->head; 414 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 415 req->cmd = CPL_ABORT_SEND_RST; 416 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 417 INIT_TP_WR(req, csk->tid); 418 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 419 req->rsvd0 = htonl(csk->snd_nxt); 420 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 421 422 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 423 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 424 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 425 req->rsvd1); 426 427 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 428 } 429 430 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 431 { 432 struct sk_buff *skb = csk->cpl_abort_rpl; 433 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 434 435 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 436 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 437 csk, csk->state, csk->flags, csk->tid, rst_status); 438 439 csk->cpl_abort_rpl = NULL; 440 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 441 INIT_TP_WR(rpl, csk->tid); 442 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 443 rpl->cmd = rst_status; 444 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 445 } 446 447 /* 448 * CPL connection rx data ack: host -> 449 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 450 * credits sent. 451 */ 452 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 453 { 454 struct sk_buff *skb; 455 struct cpl_rx_data_ack *req; 456 457 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 458 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 459 csk, csk->state, csk->flags, csk->tid, credits); 460 461 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 462 if (!skb) { 463 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 464 return 0; 465 } 466 req = (struct cpl_rx_data_ack *)skb->head; 467 468 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 469 INIT_TP_WR(req, csk->tid); 470 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 471 csk->tid)); 472 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) 473 | RX_FORCE_ACK_F); 474 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 475 return credits; 476 } 477 478 /* 479 * sgl_len - calculates the size of an SGL of the given capacity 480 * @n: the number of SGL entries 481 * Calculates the number of flits needed for a scatter/gather list that 482 * can hold the given number of entries. 483 */ 484 static inline unsigned int sgl_len(unsigned int n) 485 { 486 n--; 487 return (3 * n) / 2 + (n & 1) + 2; 488 } 489 490 /* 491 * calc_tx_flits_ofld - calculate # of flits for an offload packet 492 * @skb: the packet 493 * 494 * Returns the number of flits needed for the given offload packet. 495 * These packets are already fully constructed and no additional headers 496 * will be added. 497 */ 498 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 499 { 500 unsigned int flits, cnt; 501 502 if (is_ofld_imm(skb)) 503 return DIV_ROUND_UP(skb->len, 8); 504 flits = skb_transport_offset(skb) / 8; 505 cnt = skb_shinfo(skb)->nr_frags; 506 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 507 cnt++; 508 return flits + sgl_len(cnt); 509 } 510 511 #define FLOWC_WR_NPARAMS_MIN 9 512 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) 513 { 514 int nparams, flowclen16, flowclen; 515 516 nparams = FLOWC_WR_NPARAMS_MIN; 517 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 518 flowclen16 = DIV_ROUND_UP(flowclen, 16); 519 flowclen = flowclen16 * 16; 520 /* 521 * Return the number of 16-byte credits used by the FlowC request. 522 * Pass back the nparams and actual FlowC length if requested. 523 */ 524 if (nparamsp) 525 *nparamsp = nparams; 526 if (flowclenp) 527 *flowclenp = flowclen; 528 529 return flowclen16; 530 } 531 532 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) 533 { 534 struct sk_buff *skb; 535 struct fw_flowc_wr *flowc; 536 int nparams, flowclen16, flowclen; 537 538 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); 539 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 540 flowc = (struct fw_flowc_wr *)skb->head; 541 flowc->op_to_nparams = 542 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); 543 flowc->flowid_len16 = 544 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); 545 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 546 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 547 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 548 flowc->mnemval[1].val = htonl(csk->tx_chan); 549 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 550 flowc->mnemval[2].val = htonl(csk->tx_chan); 551 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 552 flowc->mnemval[3].val = htonl(csk->rss_qid); 553 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 554 flowc->mnemval[4].val = htonl(csk->snd_nxt); 555 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 556 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 557 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 558 flowc->mnemval[6].val = htonl(csk->snd_win); 559 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 560 flowc->mnemval[7].val = htonl(csk->advmss); 561 flowc->mnemval[8].mnemonic = 0; 562 flowc->mnemval[8].val = 0; 563 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 564 flowc->mnemval[8].val = 16384; 565 566 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 567 568 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 569 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 570 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 571 csk->snd_nxt, csk->rcv_nxt, csk->snd_win, 572 csk->advmss); 573 574 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 575 576 return flowclen16; 577 } 578 579 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 580 int dlen, int len, u32 credits, int compl) 581 { 582 struct fw_ofld_tx_data_wr *req; 583 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 584 unsigned int wr_ulp_mode = 0, val; 585 bool imm = is_ofld_imm(skb); 586 587 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 588 589 if (imm) { 590 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 591 FW_WR_COMPL_F | 592 FW_WR_IMMDLEN_V(dlen)); 593 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | 594 FW_WR_LEN16_V(credits)); 595 } else { 596 req->op_to_immdlen = 597 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 598 FW_WR_COMPL_F | 599 FW_WR_IMMDLEN_V(0)); 600 req->flowid_len16 = 601 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | 602 FW_WR_LEN16_V(credits)); 603 } 604 if (submode) 605 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | 606 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); 607 val = skb_peek(&csk->write_queue) ? 0 : 1; 608 req->tunnel_to_proxy = htonl(wr_ulp_mode | 609 FW_OFLD_TX_DATA_WR_SHOVE_V(val)); 610 req->plen = htonl(len); 611 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 612 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 613 } 614 615 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 616 { 617 kfree_skb(skb); 618 } 619 620 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 621 { 622 int total_size = 0; 623 struct sk_buff *skb; 624 625 if (unlikely(csk->state < CTP_ESTABLISHED || 626 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 627 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 628 1 << CXGBI_DBG_PDU_TX, 629 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 630 csk, csk->state, csk->flags, csk->tid); 631 return 0; 632 } 633 634 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 635 int dlen = skb->len; 636 int len = skb->len; 637 unsigned int credits_needed; 638 int flowclen16 = 0; 639 640 skb_reset_transport_header(skb); 641 if (is_ofld_imm(skb)) 642 credits_needed = DIV_ROUND_UP(dlen, 16); 643 else 644 credits_needed = DIV_ROUND_UP( 645 8 * calc_tx_flits_ofld(skb), 646 16); 647 648 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 649 credits_needed += DIV_ROUND_UP( 650 sizeof(struct fw_ofld_tx_data_wr), 651 16); 652 653 /* 654 * Assumes the initial credits is large enough to support 655 * fw_flowc_wr plus largest possible first payload 656 */ 657 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 658 flowclen16 = send_tx_flowc_wr(csk); 659 csk->wr_cred -= flowclen16; 660 csk->wr_una_cred += flowclen16; 661 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 662 } 663 664 if (csk->wr_cred < credits_needed) { 665 log_debug(1 << CXGBI_DBG_PDU_TX, 666 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 667 csk, skb->len, skb->data_len, 668 credits_needed, csk->wr_cred); 669 break; 670 } 671 __skb_unlink(skb, &csk->write_queue); 672 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 673 skb->csum = credits_needed + flowclen16; 674 csk->wr_cred -= credits_needed; 675 csk->wr_una_cred += credits_needed; 676 cxgbi_sock_enqueue_wr(csk, skb); 677 678 log_debug(1 << CXGBI_DBG_PDU_TX, 679 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 680 csk, skb->len, skb->data_len, credits_needed, 681 csk->wr_cred, csk->wr_una_cred); 682 683 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 684 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 685 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 686 req_completion); 687 csk->snd_nxt += len; 688 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 689 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) && 690 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) { 691 struct cpl_close_con_req *req = 692 (struct cpl_close_con_req *)skb->data; 693 req->wr.wr_hi |= htonl(FW_WR_COMPL_F); 694 } 695 total_size += skb->truesize; 696 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 697 698 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 699 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 700 csk, csk->state, csk->flags, csk->tid, skb, len); 701 702 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 703 } 704 return total_size; 705 } 706 707 static inline void free_atid(struct cxgbi_sock *csk) 708 { 709 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 710 711 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 712 cxgb4_free_atid(lldi->tids, csk->atid); 713 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 714 cxgbi_sock_put(csk); 715 } 716 } 717 718 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 719 { 720 struct cxgbi_sock *csk; 721 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 722 unsigned short tcp_opt = ntohs(req->tcp_opt); 723 unsigned int tid = GET_TID(req); 724 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 725 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 726 struct tid_info *t = lldi->tids; 727 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 728 729 csk = lookup_atid(t, atid); 730 if (unlikely(!csk)) { 731 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 732 goto rel_skb; 733 } 734 735 if (csk->atid != atid) { 736 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 737 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 738 goto rel_skb; 739 } 740 741 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 742 (&csk->saddr), (&csk->daddr), 743 atid, tid, csk, csk->state, csk->flags, rcv_isn); 744 745 module_put(THIS_MODULE); 746 747 cxgbi_sock_get(csk); 748 csk->tid = tid; 749 cxgb4_insert_tid(lldi->tids, csk, tid); 750 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 751 752 free_atid(csk); 753 754 spin_lock_bh(&csk->lock); 755 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 756 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 757 csk, csk->state, csk->flags, csk->tid); 758 759 if (csk->retry_timer.function) { 760 del_timer(&csk->retry_timer); 761 csk->retry_timer.function = NULL; 762 } 763 764 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 765 /* 766 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 767 * pass through opt0. 768 */ 769 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) 770 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); 771 772 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 773 if (TCPOPT_TSTAMP_G(tcp_opt)) 774 csk->advmss -= 12; 775 if (csk->advmss < 128) 776 csk->advmss = 128; 777 778 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 779 "csk 0x%p, mss_idx %u, advmss %u.\n", 780 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 781 782 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 783 784 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 785 send_abort_req(csk); 786 else { 787 if (skb_queue_len(&csk->write_queue)) 788 push_tx_frames(csk, 0); 789 cxgbi_conn_tx_open(csk); 790 } 791 spin_unlock_bh(&csk->lock); 792 793 rel_skb: 794 __kfree_skb(skb); 795 } 796 797 static int act_open_rpl_status_to_errno(int status) 798 { 799 switch (status) { 800 case CPL_ERR_CONN_RESET: 801 return -ECONNREFUSED; 802 case CPL_ERR_ARP_MISS: 803 return -EHOSTUNREACH; 804 case CPL_ERR_CONN_TIMEDOUT: 805 return -ETIMEDOUT; 806 case CPL_ERR_TCAM_FULL: 807 return -ENOMEM; 808 case CPL_ERR_CONN_EXIST: 809 return -EADDRINUSE; 810 default: 811 return -EIO; 812 } 813 } 814 815 static void csk_act_open_retry_timer(unsigned long data) 816 { 817 struct sk_buff *skb = NULL; 818 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 819 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 820 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 821 struct l2t_entry *); 822 int t4 = is_t4(lldi->adapter_type), size, size6; 823 824 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 825 "csk 0x%p,%u,0x%lx,%u.\n", 826 csk, csk->state, csk->flags, csk->tid); 827 828 cxgbi_sock_get(csk); 829 spin_lock_bh(&csk->lock); 830 831 if (t4) { 832 size = sizeof(struct cpl_act_open_req); 833 size6 = sizeof(struct cpl_act_open_req6); 834 } else { 835 size = sizeof(struct cpl_t5_act_open_req); 836 size6 = sizeof(struct cpl_t5_act_open_req6); 837 } 838 839 if (csk->csk_family == AF_INET) { 840 send_act_open_func = send_act_open_req; 841 skb = alloc_wr(size, 0, GFP_ATOMIC); 842 #if IS_ENABLED(CONFIG_IPV6) 843 } else { 844 send_act_open_func = send_act_open_req6; 845 skb = alloc_wr(size6, 0, GFP_ATOMIC); 846 #endif 847 } 848 849 if (!skb) 850 cxgbi_sock_fail_act_open(csk, -ENOMEM); 851 else { 852 skb->sk = (struct sock *)csk; 853 t4_set_arp_err_handler(skb, csk, 854 cxgbi_sock_act_open_req_arp_failure); 855 send_act_open_func(csk, skb, csk->l2t); 856 } 857 858 spin_unlock_bh(&csk->lock); 859 cxgbi_sock_put(csk); 860 861 } 862 863 static inline bool is_neg_adv(unsigned int status) 864 { 865 return status == CPL_ERR_RTX_NEG_ADVICE || 866 status == CPL_ERR_KEEPALV_NEG_ADVICE || 867 status == CPL_ERR_PERSIST_NEG_ADVICE; 868 } 869 870 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 871 { 872 struct cxgbi_sock *csk; 873 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 874 unsigned int tid = GET_TID(rpl); 875 unsigned int atid = 876 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 877 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 878 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 879 struct tid_info *t = lldi->tids; 880 881 csk = lookup_atid(t, atid); 882 if (unlikely(!csk)) { 883 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 884 goto rel_skb; 885 } 886 887 pr_info_ipaddr("tid %u/%u, status %u.\n" 888 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 889 atid, tid, status, csk, csk->state, csk->flags); 890 891 if (is_neg_adv(status)) 892 goto rel_skb; 893 894 module_put(THIS_MODULE); 895 896 if (status && status != CPL_ERR_TCAM_FULL && 897 status != CPL_ERR_CONN_EXIST && 898 status != CPL_ERR_ARP_MISS) 899 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 900 901 cxgbi_sock_get(csk); 902 spin_lock_bh(&csk->lock); 903 904 if (status == CPL_ERR_CONN_EXIST && 905 csk->retry_timer.function != csk_act_open_retry_timer) { 906 csk->retry_timer.function = csk_act_open_retry_timer; 907 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 908 } else 909 cxgbi_sock_fail_act_open(csk, 910 act_open_rpl_status_to_errno(status)); 911 912 spin_unlock_bh(&csk->lock); 913 cxgbi_sock_put(csk); 914 rel_skb: 915 __kfree_skb(skb); 916 } 917 918 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 919 { 920 struct cxgbi_sock *csk; 921 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 922 unsigned int tid = GET_TID(req); 923 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 924 struct tid_info *t = lldi->tids; 925 926 csk = lookup_tid(t, tid); 927 if (unlikely(!csk)) { 928 pr_err("can't find connection for tid %u.\n", tid); 929 goto rel_skb; 930 } 931 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 932 (&csk->saddr), (&csk->daddr), 933 csk, csk->state, csk->flags, csk->tid); 934 cxgbi_sock_rcv_peer_close(csk); 935 rel_skb: 936 __kfree_skb(skb); 937 } 938 939 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 940 { 941 struct cxgbi_sock *csk; 942 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 943 unsigned int tid = GET_TID(rpl); 944 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 945 struct tid_info *t = lldi->tids; 946 947 csk = lookup_tid(t, tid); 948 if (unlikely(!csk)) { 949 pr_err("can't find connection for tid %u.\n", tid); 950 goto rel_skb; 951 } 952 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 953 (&csk->saddr), (&csk->daddr), 954 csk, csk->state, csk->flags, csk->tid); 955 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 956 rel_skb: 957 __kfree_skb(skb); 958 } 959 960 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 961 int *need_rst) 962 { 963 switch (abort_reason) { 964 case CPL_ERR_BAD_SYN: /* fall through */ 965 case CPL_ERR_CONN_RESET: 966 return csk->state > CTP_ESTABLISHED ? 967 -EPIPE : -ECONNRESET; 968 case CPL_ERR_XMIT_TIMEDOUT: 969 case CPL_ERR_PERSIST_TIMEDOUT: 970 case CPL_ERR_FINWAIT2_TIMEDOUT: 971 case CPL_ERR_KEEPALIVE_TIMEDOUT: 972 return -ETIMEDOUT; 973 default: 974 return -EIO; 975 } 976 } 977 978 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 979 { 980 struct cxgbi_sock *csk; 981 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 982 unsigned int tid = GET_TID(req); 983 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 984 struct tid_info *t = lldi->tids; 985 int rst_status = CPL_ABORT_NO_RST; 986 987 csk = lookup_tid(t, tid); 988 if (unlikely(!csk)) { 989 pr_err("can't find connection for tid %u.\n", tid); 990 goto rel_skb; 991 } 992 993 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 994 (&csk->saddr), (&csk->daddr), 995 csk, csk->state, csk->flags, csk->tid, req->status); 996 997 if (is_neg_adv(req->status)) 998 goto rel_skb; 999 1000 cxgbi_sock_get(csk); 1001 spin_lock_bh(&csk->lock); 1002 1003 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 1004 1005 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 1006 send_tx_flowc_wr(csk); 1007 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 1008 } 1009 1010 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 1011 cxgbi_sock_set_state(csk, CTP_ABORTING); 1012 1013 send_abort_rpl(csk, rst_status); 1014 1015 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1016 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1017 cxgbi_sock_closed(csk); 1018 } 1019 1020 spin_unlock_bh(&csk->lock); 1021 cxgbi_sock_put(csk); 1022 rel_skb: 1023 __kfree_skb(skb); 1024 } 1025 1026 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1027 { 1028 struct cxgbi_sock *csk; 1029 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1030 unsigned int tid = GET_TID(rpl); 1031 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1032 struct tid_info *t = lldi->tids; 1033 1034 csk = lookup_tid(t, tid); 1035 if (!csk) 1036 goto rel_skb; 1037 1038 if (csk) 1039 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1040 (&csk->saddr), (&csk->daddr), csk, 1041 csk->state, csk->flags, csk->tid, rpl->status); 1042 1043 if (rpl->status == CPL_ERR_ABORT_FAILED) 1044 goto rel_skb; 1045 1046 cxgbi_sock_rcv_abort_rpl(csk); 1047 rel_skb: 1048 __kfree_skb(skb); 1049 } 1050 1051 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1052 { 1053 struct cxgbi_sock *csk; 1054 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1055 unsigned int tid = GET_TID(cpl); 1056 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1057 struct tid_info *t = lldi->tids; 1058 1059 csk = lookup_tid(t, tid); 1060 if (!csk) { 1061 pr_err("can't find connection for tid %u.\n", tid); 1062 } else { 1063 /* not expecting this, reset the connection. */ 1064 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1065 spin_lock_bh(&csk->lock); 1066 send_abort_req(csk); 1067 spin_unlock_bh(&csk->lock); 1068 } 1069 __kfree_skb(skb); 1070 } 1071 1072 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1073 { 1074 struct cxgbi_sock *csk; 1075 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1076 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1077 unsigned int tid = GET_TID(cpl); 1078 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1079 struct tid_info *t = lldi->tids; 1080 1081 csk = lookup_tid(t, tid); 1082 if (unlikely(!csk)) { 1083 pr_err("can't find conn. for tid %u.\n", tid); 1084 goto rel_skb; 1085 } 1086 1087 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1088 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1089 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1090 pdu_len_ddp); 1091 1092 spin_lock_bh(&csk->lock); 1093 1094 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1095 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1096 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1097 csk, csk->state, csk->flags, csk->tid); 1098 if (csk->state != CTP_ABORTING) 1099 goto abort_conn; 1100 else 1101 goto discard; 1102 } 1103 1104 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1105 cxgbi_skcb_flags(skb) = 0; 1106 1107 skb_reset_transport_header(skb); 1108 __skb_pull(skb, sizeof(*cpl)); 1109 __pskb_trim(skb, ntohs(cpl->len)); 1110 1111 if (!csk->skb_ulp_lhdr) { 1112 unsigned char *bhs; 1113 unsigned int hlen, dlen, plen; 1114 1115 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1116 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1117 csk, csk->state, csk->flags, csk->tid, skb); 1118 csk->skb_ulp_lhdr = skb; 1119 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1120 1121 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1122 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1123 csk->tid, cxgbi_skcb_tcp_seq(skb), 1124 csk->rcv_nxt); 1125 goto abort_conn; 1126 } 1127 1128 bhs = skb->data; 1129 hlen = ntohs(cpl->len); 1130 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1131 1132 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1133 if (is_t4(lldi->adapter_type)) 1134 plen -= 40; 1135 1136 if ((hlen + dlen) != plen) { 1137 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1138 "mismatch %u != %u + %u, seq 0x%x.\n", 1139 csk->tid, plen, hlen, dlen, 1140 cxgbi_skcb_tcp_seq(skb)); 1141 goto abort_conn; 1142 } 1143 1144 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1145 if (dlen) 1146 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1147 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1148 1149 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1150 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1151 csk, skb, *bhs, hlen, dlen, 1152 ntohl(*((unsigned int *)(bhs + 16))), 1153 ntohl(*((unsigned int *)(bhs + 24)))); 1154 1155 } else { 1156 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1157 1158 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1159 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1160 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1161 csk, csk->state, csk->flags, skb, lskb); 1162 } 1163 1164 __skb_queue_tail(&csk->receive_queue, skb); 1165 spin_unlock_bh(&csk->lock); 1166 return; 1167 1168 abort_conn: 1169 send_abort_req(csk); 1170 discard: 1171 spin_unlock_bh(&csk->lock); 1172 rel_skb: 1173 __kfree_skb(skb); 1174 } 1175 1176 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1177 struct sk_buff *skb) 1178 { 1179 struct cxgbi_sock *csk; 1180 struct sk_buff *lskb; 1181 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1182 unsigned int tid = GET_TID(rpl); 1183 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1184 struct tid_info *t = lldi->tids; 1185 unsigned int status = ntohl(rpl->ddpvld); 1186 1187 csk = lookup_tid(t, tid); 1188 if (unlikely(!csk)) { 1189 pr_err("can't find connection for tid %u.\n", tid); 1190 goto rel_skb; 1191 } 1192 1193 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1194 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1195 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1196 1197 spin_lock_bh(&csk->lock); 1198 1199 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1200 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1201 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1202 csk, csk->state, csk->flags, csk->tid); 1203 if (csk->state != CTP_ABORTING) 1204 goto abort_conn; 1205 else 1206 goto discard; 1207 } 1208 1209 if (!csk->skb_ulp_lhdr) { 1210 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1211 goto abort_conn; 1212 } 1213 1214 lskb = csk->skb_ulp_lhdr; 1215 csk->skb_ulp_lhdr = NULL; 1216 1217 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1218 1219 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1220 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1221 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1222 1223 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1224 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1225 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1226 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1227 } 1228 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1229 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1230 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1231 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1232 } 1233 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1234 log_debug(1 << CXGBI_DBG_PDU_RX, 1235 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1236 csk, lskb, status); 1237 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1238 } 1239 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1240 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1241 log_debug(1 << CXGBI_DBG_PDU_RX, 1242 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1243 csk, lskb, status); 1244 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1245 } 1246 log_debug(1 << CXGBI_DBG_PDU_RX, 1247 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1248 csk, lskb, cxgbi_skcb_flags(lskb)); 1249 1250 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1251 cxgbi_conn_pdu_ready(csk); 1252 spin_unlock_bh(&csk->lock); 1253 goto rel_skb; 1254 1255 abort_conn: 1256 send_abort_req(csk); 1257 discard: 1258 spin_unlock_bh(&csk->lock); 1259 rel_skb: 1260 __kfree_skb(skb); 1261 } 1262 1263 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1264 { 1265 struct cxgbi_sock *csk; 1266 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1267 unsigned int tid = GET_TID(rpl); 1268 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1269 struct tid_info *t = lldi->tids; 1270 1271 csk = lookup_tid(t, tid); 1272 if (unlikely(!csk)) 1273 pr_err("can't find connection for tid %u.\n", tid); 1274 else { 1275 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1276 "csk 0x%p,%u,0x%lx,%u.\n", 1277 csk, csk->state, csk->flags, csk->tid); 1278 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1279 rpl->seq_vld); 1280 } 1281 __kfree_skb(skb); 1282 } 1283 1284 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1285 { 1286 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1287 unsigned int tid = GET_TID(rpl); 1288 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1289 struct tid_info *t = lldi->tids; 1290 struct cxgbi_sock *csk; 1291 1292 csk = lookup_tid(t, tid); 1293 if (!csk) 1294 pr_err("can't find conn. for tid %u.\n", tid); 1295 1296 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1297 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1298 csk, csk->state, csk->flags, csk->tid, rpl->status); 1299 1300 if (rpl->status != CPL_ERR_NONE) 1301 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1302 csk, tid, rpl->status); 1303 1304 __kfree_skb(skb); 1305 } 1306 1307 static int alloc_cpls(struct cxgbi_sock *csk) 1308 { 1309 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1310 0, GFP_KERNEL); 1311 if (!csk->cpl_close) 1312 return -ENOMEM; 1313 1314 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1315 0, GFP_KERNEL); 1316 if (!csk->cpl_abort_req) 1317 goto free_cpls; 1318 1319 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1320 0, GFP_KERNEL); 1321 if (!csk->cpl_abort_rpl) 1322 goto free_cpls; 1323 return 0; 1324 1325 free_cpls: 1326 cxgbi_sock_free_cpl_skbs(csk); 1327 return -ENOMEM; 1328 } 1329 1330 static inline void l2t_put(struct cxgbi_sock *csk) 1331 { 1332 if (csk->l2t) { 1333 cxgb4_l2t_release(csk->l2t); 1334 csk->l2t = NULL; 1335 cxgbi_sock_put(csk); 1336 } 1337 } 1338 1339 static void release_offload_resources(struct cxgbi_sock *csk) 1340 { 1341 struct cxgb4_lld_info *lldi; 1342 #if IS_ENABLED(CONFIG_IPV6) 1343 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1344 #endif 1345 1346 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1347 "csk 0x%p,%u,0x%lx,%u.\n", 1348 csk, csk->state, csk->flags, csk->tid); 1349 1350 cxgbi_sock_free_cpl_skbs(csk); 1351 if (csk->wr_cred != csk->wr_max_cred) { 1352 cxgbi_sock_purge_wr_queue(csk); 1353 cxgbi_sock_reset_wr_list(csk); 1354 } 1355 1356 l2t_put(csk); 1357 #if IS_ENABLED(CONFIG_IPV6) 1358 if (csk->csk_family == AF_INET6) 1359 cxgb4_clip_release(ndev, 1360 (const u32 *)&csk->saddr6.sin6_addr, 1); 1361 #endif 1362 1363 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1364 free_atid(csk); 1365 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1366 lldi = cxgbi_cdev_priv(csk->cdev); 1367 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1368 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1369 cxgbi_sock_put(csk); 1370 } 1371 csk->dst = NULL; 1372 csk->cdev = NULL; 1373 } 1374 1375 static int init_act_open(struct cxgbi_sock *csk) 1376 { 1377 struct cxgbi_device *cdev = csk->cdev; 1378 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1379 struct net_device *ndev = cdev->ports[csk->port_id]; 1380 struct sk_buff *skb = NULL; 1381 struct neighbour *n = NULL; 1382 void *daddr; 1383 unsigned int step; 1384 unsigned int size, size6; 1385 int t4 = is_t4(lldi->adapter_type); 1386 unsigned int linkspeed; 1387 unsigned int rcv_winf, snd_winf; 1388 1389 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1390 "csk 0x%p,%u,0x%lx,%u.\n", 1391 csk, csk->state, csk->flags, csk->tid); 1392 1393 if (csk->csk_family == AF_INET) 1394 daddr = &csk->daddr.sin_addr.s_addr; 1395 #if IS_ENABLED(CONFIG_IPV6) 1396 else if (csk->csk_family == AF_INET6) 1397 daddr = &csk->daddr6.sin6_addr; 1398 #endif 1399 else { 1400 pr_err("address family 0x%x not supported\n", csk->csk_family); 1401 goto rel_resource; 1402 } 1403 1404 n = dst_neigh_lookup(csk->dst, daddr); 1405 1406 if (!n) { 1407 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1408 goto rel_resource; 1409 } 1410 1411 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1412 if (csk->atid < 0) { 1413 pr_err("%s, NO atid available.\n", ndev->name); 1414 goto rel_resource_without_clip; 1415 } 1416 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1417 cxgbi_sock_get(csk); 1418 1419 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1420 if (!csk->l2t) { 1421 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1422 goto rel_resource_without_clip; 1423 } 1424 cxgbi_sock_get(csk); 1425 1426 #if IS_ENABLED(CONFIG_IPV6) 1427 if (csk->csk_family == AF_INET6) 1428 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1429 #endif 1430 1431 if (t4) { 1432 size = sizeof(struct cpl_act_open_req); 1433 size6 = sizeof(struct cpl_act_open_req6); 1434 } else { 1435 size = sizeof(struct cpl_t5_act_open_req); 1436 size6 = sizeof(struct cpl_t5_act_open_req6); 1437 } 1438 1439 if (csk->csk_family == AF_INET) 1440 skb = alloc_wr(size, 0, GFP_NOIO); 1441 #if IS_ENABLED(CONFIG_IPV6) 1442 else 1443 skb = alloc_wr(size6, 0, GFP_NOIO); 1444 #endif 1445 1446 if (!skb) 1447 goto rel_resource; 1448 skb->sk = (struct sock *)csk; 1449 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1450 1451 if (!csk->mtu) 1452 csk->mtu = dst_mtu(csk->dst); 1453 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1454 csk->tx_chan = cxgb4_port_chan(ndev); 1455 /* SMT two entries per row */ 1456 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1457 step = lldi->ntxq / lldi->nchan; 1458 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1459 step = lldi->nrxq / lldi->nchan; 1460 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1461 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; 1462 csk->snd_win = cxgb4i_snd_win; 1463 csk->rcv_win = cxgb4i_rcv_win; 1464 if (cxgb4i_rcv_win <= 0) { 1465 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; 1466 rcv_winf = linkspeed / SPEED_10000; 1467 if (rcv_winf) 1468 csk->rcv_win *= rcv_winf; 1469 } 1470 if (cxgb4i_snd_win <= 0) { 1471 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; 1472 snd_winf = linkspeed / SPEED_10000; 1473 if (snd_winf) 1474 csk->snd_win *= snd_winf; 1475 } 1476 csk->wr_cred = lldi->wr_cred - 1477 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1478 csk->wr_max_cred = csk->wr_cred; 1479 csk->wr_una_cred = 0; 1480 cxgbi_sock_reset_wr_list(csk); 1481 csk->err = 0; 1482 1483 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1484 (&csk->saddr), (&csk->daddr), csk, csk->state, 1485 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1486 csk->mtu, csk->mss_idx, csk->smac_idx); 1487 1488 /* must wait for either a act_open_rpl or act_open_establish */ 1489 try_module_get(THIS_MODULE); 1490 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1491 if (csk->csk_family == AF_INET) 1492 send_act_open_req(csk, skb, csk->l2t); 1493 #if IS_ENABLED(CONFIG_IPV6) 1494 else 1495 send_act_open_req6(csk, skb, csk->l2t); 1496 #endif 1497 neigh_release(n); 1498 1499 return 0; 1500 1501 rel_resource: 1502 #if IS_ENABLED(CONFIG_IPV6) 1503 if (csk->csk_family == AF_INET6) 1504 cxgb4_clip_release(ndev, 1505 (const u32 *)&csk->saddr6.sin6_addr, 1); 1506 #endif 1507 rel_resource_without_clip: 1508 if (n) 1509 neigh_release(n); 1510 if (skb) 1511 __kfree_skb(skb); 1512 return -EINVAL; 1513 } 1514 1515 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1516 [CPL_ACT_ESTABLISH] = do_act_establish, 1517 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1518 [CPL_PEER_CLOSE] = do_peer_close, 1519 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1520 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1521 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1522 [CPL_FW4_ACK] = do_fw4_ack, 1523 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1524 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1525 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1526 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1527 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1528 [CPL_RX_DATA] = do_rx_data, 1529 }; 1530 1531 static int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1532 { 1533 int rc; 1534 1535 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1536 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1537 1538 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1539 cxgb4i_max_connect); 1540 if (rc < 0) 1541 return rc; 1542 1543 cdev->csk_release_offload_resources = release_offload_resources; 1544 cdev->csk_push_tx_frames = push_tx_frames; 1545 cdev->csk_send_abort_req = send_abort_req; 1546 cdev->csk_send_close_req = send_close_req; 1547 cdev->csk_send_rx_credits = send_rx_credits; 1548 cdev->csk_alloc_cpls = alloc_cpls; 1549 cdev->csk_init_act_open = init_act_open; 1550 1551 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1552 return 0; 1553 } 1554 1555 static inline void 1556 ulp_mem_io_set_hdr(struct cxgbi_device *cdev, 1557 struct ulp_mem_io *req, 1558 unsigned int wr_len, unsigned int dlen, 1559 unsigned int pm_addr, 1560 int tid) 1561 { 1562 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1563 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1564 1565 INIT_ULPTX_WR(req, wr_len, 0, tid); 1566 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | 1567 FW_WR_ATOMIC_V(0)); 1568 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1569 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | 1570 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); 1571 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1572 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1573 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1574 1575 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1576 idata->len = htonl(dlen); 1577 } 1578 1579 static struct sk_buff * 1580 ddp_ppod_init_idata(struct cxgbi_device *cdev, 1581 struct cxgbi_ppm *ppm, 1582 unsigned int idx, unsigned int npods, 1583 unsigned int tid) 1584 { 1585 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1586 unsigned int dlen = npods << PPOD_SIZE_SHIFT; 1587 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1588 sizeof(struct ulptx_idata) + dlen, 16); 1589 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1590 1591 if (!skb) { 1592 pr_err("%s: %s idx %u, npods %u, OOM.\n", 1593 __func__, ppm->ndev->name, idx, npods); 1594 return NULL; 1595 } 1596 1597 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, 1598 pm_addr, tid); 1599 1600 return skb; 1601 } 1602 1603 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1604 struct cxgbi_task_tag_info *ttinfo, 1605 unsigned int idx, unsigned int npods, 1606 struct scatterlist **sg_pp, 1607 unsigned int *sg_off) 1608 { 1609 struct cxgbi_device *cdev = csk->cdev; 1610 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, 1611 csk->tid); 1612 struct ulp_mem_io *req; 1613 struct ulptx_idata *idata; 1614 struct cxgbi_pagepod *ppod; 1615 int i; 1616 1617 if (!skb) 1618 return -ENOMEM; 1619 1620 req = (struct ulp_mem_io *)skb->head; 1621 idata = (struct ulptx_idata *)(req + 1); 1622 ppod = (struct cxgbi_pagepod *)(idata + 1); 1623 1624 for (i = 0; i < npods; i++, ppod++) 1625 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); 1626 1627 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); 1628 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); 1629 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 1630 1631 spin_lock_bh(&csk->lock); 1632 cxgbi_sock_skb_entail(csk, skb); 1633 spin_unlock_bh(&csk->lock); 1634 1635 return 0; 1636 } 1637 1638 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1639 struct cxgbi_task_tag_info *ttinfo) 1640 { 1641 unsigned int pidx = ttinfo->idx; 1642 unsigned int npods = ttinfo->npods; 1643 unsigned int i, cnt; 1644 int err = 0; 1645 struct scatterlist *sg = ttinfo->sgl; 1646 unsigned int offset = 0; 1647 1648 ttinfo->cid = csk->port_id; 1649 1650 for (i = 0; i < npods; i += cnt, pidx += cnt) { 1651 cnt = npods - i; 1652 1653 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1654 cnt = ULPMEM_IDATA_MAX_NPPODS; 1655 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, 1656 &sg, &offset); 1657 if (err < 0) 1658 break; 1659 } 1660 1661 return err; 1662 } 1663 1664 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1665 int pg_idx, bool reply) 1666 { 1667 struct sk_buff *skb; 1668 struct cpl_set_tcb_field *req; 1669 1670 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1671 return 0; 1672 1673 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1674 if (!skb) 1675 return -ENOMEM; 1676 1677 /* set up ulp page size */ 1678 req = (struct cpl_set_tcb_field *)skb->head; 1679 INIT_TP_WR(req, csk->tid); 1680 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1681 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1682 req->word_cookie = htons(0); 1683 req->mask = cpu_to_be64(0x3 << 8); 1684 req->val = cpu_to_be64(pg_idx << 8); 1685 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1686 1687 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1688 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1689 1690 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1691 return 0; 1692 } 1693 1694 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1695 int hcrc, int dcrc, int reply) 1696 { 1697 struct sk_buff *skb; 1698 struct cpl_set_tcb_field *req; 1699 1700 if (!hcrc && !dcrc) 1701 return 0; 1702 1703 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1704 if (!skb) 1705 return -ENOMEM; 1706 1707 csk->hcrc_len = (hcrc ? 4 : 0); 1708 csk->dcrc_len = (dcrc ? 4 : 0); 1709 /* set up ulp submode */ 1710 req = (struct cpl_set_tcb_field *)skb->head; 1711 INIT_TP_WR(req, tid); 1712 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1713 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1714 req->word_cookie = htons(0); 1715 req->mask = cpu_to_be64(0x3 << 4); 1716 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1717 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1718 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1719 1720 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1721 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1722 1723 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1724 return 0; 1725 } 1726 1727 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) 1728 { 1729 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) 1730 (cxgbi_cdev_priv(cdev)))->iscsi_ppm); 1731 } 1732 1733 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1734 { 1735 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1736 struct net_device *ndev = cdev->ports[0]; 1737 struct cxgbi_tag_format tformat; 1738 unsigned int ppmax; 1739 int i; 1740 1741 if (!lldi->vr->iscsi.size) { 1742 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); 1743 return -EACCES; 1744 } 1745 1746 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; 1747 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; 1748 1749 memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); 1750 for (i = 0; i < 4; i++) 1751 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) 1752 & 0xF; 1753 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); 1754 1755 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, 1756 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); 1757 1758 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1759 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1760 cdev->csk_ddp_set_map = ddp_set_map; 1761 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1762 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1763 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1764 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1765 cdev->cdev2ppm = cdev2ppm; 1766 1767 return 0; 1768 } 1769 1770 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1771 { 1772 struct cxgbi_device *cdev; 1773 struct port_info *pi; 1774 int i, rc; 1775 1776 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1777 if (!cdev) { 1778 pr_info("t4 device 0x%p, register failed.\n", lldi); 1779 return NULL; 1780 } 1781 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1782 cdev, lldi->adapter_type, lldi->nports, 1783 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1784 lldi->nrxq, lldi->wr_cred); 1785 for (i = 0; i < lldi->nrxq; i++) 1786 log_debug(1 << CXGBI_DBG_DEV, 1787 "t4 0x%p, rxq id #%d: %u.\n", 1788 cdev, i, lldi->rxq_ids[i]); 1789 1790 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1791 cdev->flags = CXGBI_FLAG_DEV_T4; 1792 cdev->pdev = lldi->pdev; 1793 cdev->ports = lldi->ports; 1794 cdev->nports = lldi->nports; 1795 cdev->mtus = lldi->mtus; 1796 cdev->nmtus = NMTUS; 1797 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1798 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1799 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1800 cdev->itp = &cxgb4i_iscsi_transport; 1801 1802 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 1803 << FW_VIID_PFN_S; 1804 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1805 cdev, lldi->ports[0]->name, cdev->pfvf); 1806 1807 rc = cxgb4i_ddp_init(cdev); 1808 if (rc) { 1809 pr_info("t4 0x%p ddp init failed.\n", cdev); 1810 goto err_out; 1811 } 1812 rc = cxgb4i_ofld_init(cdev); 1813 if (rc) { 1814 pr_info("t4 0x%p ofld init failed.\n", cdev); 1815 goto err_out; 1816 } 1817 1818 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1819 &cxgb4i_host_template, cxgb4i_stt); 1820 if (rc) 1821 goto err_out; 1822 1823 for (i = 0; i < cdev->nports; i++) { 1824 pi = netdev_priv(lldi->ports[i]); 1825 cdev->hbas[i]->port_id = pi->port_id; 1826 } 1827 return cdev; 1828 1829 err_out: 1830 cxgbi_device_unregister(cdev); 1831 return ERR_PTR(-ENOMEM); 1832 } 1833 1834 #define RX_PULL_LEN 128 1835 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1836 const struct pkt_gl *pgl) 1837 { 1838 const struct cpl_act_establish *rpl; 1839 struct sk_buff *skb; 1840 unsigned int opc; 1841 struct cxgbi_device *cdev = handle; 1842 1843 if (pgl == NULL) { 1844 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1845 1846 skb = alloc_wr(len, 0, GFP_ATOMIC); 1847 if (!skb) 1848 goto nomem; 1849 skb_copy_to_linear_data(skb, &rsp[1], len); 1850 } else { 1851 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1852 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1853 pgl->va, be64_to_cpu(*rsp), 1854 be64_to_cpu(*(u64 *)pgl->va), 1855 pgl->tot_len); 1856 return 0; 1857 } 1858 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1859 if (unlikely(!skb)) 1860 goto nomem; 1861 } 1862 1863 rpl = (struct cpl_act_establish *)skb->data; 1864 opc = rpl->ot.opcode; 1865 log_debug(1 << CXGBI_DBG_TOE, 1866 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1867 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1868 if (cxgb4i_cplhandlers[opc]) 1869 cxgb4i_cplhandlers[opc](cdev, skb); 1870 else { 1871 pr_err("No handler for opcode 0x%x.\n", opc); 1872 __kfree_skb(skb); 1873 } 1874 return 0; 1875 nomem: 1876 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1877 return 1; 1878 } 1879 1880 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1881 { 1882 struct cxgbi_device *cdev = handle; 1883 1884 switch (state) { 1885 case CXGB4_STATE_UP: 1886 pr_info("cdev 0x%p, UP.\n", cdev); 1887 break; 1888 case CXGB4_STATE_START_RECOVERY: 1889 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1890 /* close all connections */ 1891 break; 1892 case CXGB4_STATE_DOWN: 1893 pr_info("cdev 0x%p, DOWN.\n", cdev); 1894 break; 1895 case CXGB4_STATE_DETACH: 1896 pr_info("cdev 0x%p, DETACH.\n", cdev); 1897 cxgbi_device_unregister(cdev); 1898 break; 1899 default: 1900 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1901 break; 1902 } 1903 return 0; 1904 } 1905 1906 static int __init cxgb4i_init_module(void) 1907 { 1908 int rc; 1909 1910 printk(KERN_INFO "%s", version); 1911 1912 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1913 if (rc < 0) 1914 return rc; 1915 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1916 1917 return 0; 1918 } 1919 1920 static void __exit cxgb4i_exit_module(void) 1921 { 1922 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1923 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1924 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1925 } 1926 1927 module_init(cxgb4i_init_module); 1928 module_exit(cxgb4i_exit_module); 1929