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 } 689 total_size += skb->truesize; 690 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 691 692 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 693 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 694 csk, csk->state, csk->flags, csk->tid, skb, len); 695 696 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 697 } 698 return total_size; 699 } 700 701 static inline void free_atid(struct cxgbi_sock *csk) 702 { 703 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 704 705 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 706 cxgb4_free_atid(lldi->tids, csk->atid); 707 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 708 cxgbi_sock_put(csk); 709 } 710 } 711 712 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 713 { 714 struct cxgbi_sock *csk; 715 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 716 unsigned short tcp_opt = ntohs(req->tcp_opt); 717 unsigned int tid = GET_TID(req); 718 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 719 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 720 struct tid_info *t = lldi->tids; 721 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 722 723 csk = lookup_atid(t, atid); 724 if (unlikely(!csk)) { 725 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 726 goto rel_skb; 727 } 728 729 if (csk->atid != atid) { 730 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 731 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 732 goto rel_skb; 733 } 734 735 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 736 (&csk->saddr), (&csk->daddr), 737 atid, tid, csk, csk->state, csk->flags, rcv_isn); 738 739 module_put(THIS_MODULE); 740 741 cxgbi_sock_get(csk); 742 csk->tid = tid; 743 cxgb4_insert_tid(lldi->tids, csk, tid); 744 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 745 746 free_atid(csk); 747 748 spin_lock_bh(&csk->lock); 749 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 750 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 751 csk, csk->state, csk->flags, csk->tid); 752 753 if (csk->retry_timer.function) { 754 del_timer(&csk->retry_timer); 755 csk->retry_timer.function = NULL; 756 } 757 758 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 759 /* 760 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 761 * pass through opt0. 762 */ 763 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) 764 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); 765 766 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 767 if (TCPOPT_TSTAMP_G(tcp_opt)) 768 csk->advmss -= 12; 769 if (csk->advmss < 128) 770 csk->advmss = 128; 771 772 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 773 "csk 0x%p, mss_idx %u, advmss %u.\n", 774 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 775 776 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 777 778 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 779 send_abort_req(csk); 780 else { 781 if (skb_queue_len(&csk->write_queue)) 782 push_tx_frames(csk, 0); 783 cxgbi_conn_tx_open(csk); 784 } 785 spin_unlock_bh(&csk->lock); 786 787 rel_skb: 788 __kfree_skb(skb); 789 } 790 791 static int act_open_rpl_status_to_errno(int status) 792 { 793 switch (status) { 794 case CPL_ERR_CONN_RESET: 795 return -ECONNREFUSED; 796 case CPL_ERR_ARP_MISS: 797 return -EHOSTUNREACH; 798 case CPL_ERR_CONN_TIMEDOUT: 799 return -ETIMEDOUT; 800 case CPL_ERR_TCAM_FULL: 801 return -ENOMEM; 802 case CPL_ERR_CONN_EXIST: 803 return -EADDRINUSE; 804 default: 805 return -EIO; 806 } 807 } 808 809 static void csk_act_open_retry_timer(unsigned long data) 810 { 811 struct sk_buff *skb = NULL; 812 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 813 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 814 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 815 struct l2t_entry *); 816 int t4 = is_t4(lldi->adapter_type), size, size6; 817 818 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 819 "csk 0x%p,%u,0x%lx,%u.\n", 820 csk, csk->state, csk->flags, csk->tid); 821 822 cxgbi_sock_get(csk); 823 spin_lock_bh(&csk->lock); 824 825 if (t4) { 826 size = sizeof(struct cpl_act_open_req); 827 size6 = sizeof(struct cpl_act_open_req6); 828 } else { 829 size = sizeof(struct cpl_t5_act_open_req); 830 size6 = sizeof(struct cpl_t5_act_open_req6); 831 } 832 833 if (csk->csk_family == AF_INET) { 834 send_act_open_func = send_act_open_req; 835 skb = alloc_wr(size, 0, GFP_ATOMIC); 836 #if IS_ENABLED(CONFIG_IPV6) 837 } else { 838 send_act_open_func = send_act_open_req6; 839 skb = alloc_wr(size6, 0, GFP_ATOMIC); 840 #endif 841 } 842 843 if (!skb) 844 cxgbi_sock_fail_act_open(csk, -ENOMEM); 845 else { 846 skb->sk = (struct sock *)csk; 847 t4_set_arp_err_handler(skb, csk, 848 cxgbi_sock_act_open_req_arp_failure); 849 send_act_open_func(csk, skb, csk->l2t); 850 } 851 852 spin_unlock_bh(&csk->lock); 853 cxgbi_sock_put(csk); 854 855 } 856 857 static inline bool is_neg_adv(unsigned int status) 858 { 859 return status == CPL_ERR_RTX_NEG_ADVICE || 860 status == CPL_ERR_KEEPALV_NEG_ADVICE || 861 status == CPL_ERR_PERSIST_NEG_ADVICE; 862 } 863 864 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 865 { 866 struct cxgbi_sock *csk; 867 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 868 unsigned int tid = GET_TID(rpl); 869 unsigned int atid = 870 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 871 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 872 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 873 struct tid_info *t = lldi->tids; 874 875 csk = lookup_atid(t, atid); 876 if (unlikely(!csk)) { 877 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 878 goto rel_skb; 879 } 880 881 pr_info_ipaddr("tid %u/%u, status %u.\n" 882 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 883 atid, tid, status, csk, csk->state, csk->flags); 884 885 if (is_neg_adv(status)) 886 goto rel_skb; 887 888 module_put(THIS_MODULE); 889 890 if (status && status != CPL_ERR_TCAM_FULL && 891 status != CPL_ERR_CONN_EXIST && 892 status != CPL_ERR_ARP_MISS) 893 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 894 895 cxgbi_sock_get(csk); 896 spin_lock_bh(&csk->lock); 897 898 if (status == CPL_ERR_CONN_EXIST && 899 csk->retry_timer.function != csk_act_open_retry_timer) { 900 csk->retry_timer.function = csk_act_open_retry_timer; 901 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 902 } else 903 cxgbi_sock_fail_act_open(csk, 904 act_open_rpl_status_to_errno(status)); 905 906 spin_unlock_bh(&csk->lock); 907 cxgbi_sock_put(csk); 908 rel_skb: 909 __kfree_skb(skb); 910 } 911 912 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 913 { 914 struct cxgbi_sock *csk; 915 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 916 unsigned int tid = GET_TID(req); 917 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 918 struct tid_info *t = lldi->tids; 919 920 csk = lookup_tid(t, tid); 921 if (unlikely(!csk)) { 922 pr_err("can't find connection for tid %u.\n", tid); 923 goto rel_skb; 924 } 925 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 926 (&csk->saddr), (&csk->daddr), 927 csk, csk->state, csk->flags, csk->tid); 928 cxgbi_sock_rcv_peer_close(csk); 929 rel_skb: 930 __kfree_skb(skb); 931 } 932 933 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 934 { 935 struct cxgbi_sock *csk; 936 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 937 unsigned int tid = GET_TID(rpl); 938 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 939 struct tid_info *t = lldi->tids; 940 941 csk = lookup_tid(t, tid); 942 if (unlikely(!csk)) { 943 pr_err("can't find connection for tid %u.\n", tid); 944 goto rel_skb; 945 } 946 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 947 (&csk->saddr), (&csk->daddr), 948 csk, csk->state, csk->flags, csk->tid); 949 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 950 rel_skb: 951 __kfree_skb(skb); 952 } 953 954 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 955 int *need_rst) 956 { 957 switch (abort_reason) { 958 case CPL_ERR_BAD_SYN: /* fall through */ 959 case CPL_ERR_CONN_RESET: 960 return csk->state > CTP_ESTABLISHED ? 961 -EPIPE : -ECONNRESET; 962 case CPL_ERR_XMIT_TIMEDOUT: 963 case CPL_ERR_PERSIST_TIMEDOUT: 964 case CPL_ERR_FINWAIT2_TIMEDOUT: 965 case CPL_ERR_KEEPALIVE_TIMEDOUT: 966 return -ETIMEDOUT; 967 default: 968 return -EIO; 969 } 970 } 971 972 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 973 { 974 struct cxgbi_sock *csk; 975 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 976 unsigned int tid = GET_TID(req); 977 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 978 struct tid_info *t = lldi->tids; 979 int rst_status = CPL_ABORT_NO_RST; 980 981 csk = lookup_tid(t, tid); 982 if (unlikely(!csk)) { 983 pr_err("can't find connection for tid %u.\n", tid); 984 goto rel_skb; 985 } 986 987 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 988 (&csk->saddr), (&csk->daddr), 989 csk, csk->state, csk->flags, csk->tid, req->status); 990 991 if (is_neg_adv(req->status)) 992 goto rel_skb; 993 994 cxgbi_sock_get(csk); 995 spin_lock_bh(&csk->lock); 996 997 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 998 999 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 1000 send_tx_flowc_wr(csk); 1001 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 1002 } 1003 1004 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 1005 cxgbi_sock_set_state(csk, CTP_ABORTING); 1006 1007 send_abort_rpl(csk, rst_status); 1008 1009 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1010 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1011 cxgbi_sock_closed(csk); 1012 } 1013 1014 spin_unlock_bh(&csk->lock); 1015 cxgbi_sock_put(csk); 1016 rel_skb: 1017 __kfree_skb(skb); 1018 } 1019 1020 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1021 { 1022 struct cxgbi_sock *csk; 1023 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1024 unsigned int tid = GET_TID(rpl); 1025 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1026 struct tid_info *t = lldi->tids; 1027 1028 csk = lookup_tid(t, tid); 1029 if (!csk) 1030 goto rel_skb; 1031 1032 if (csk) 1033 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1034 (&csk->saddr), (&csk->daddr), csk, 1035 csk->state, csk->flags, csk->tid, rpl->status); 1036 1037 if (rpl->status == CPL_ERR_ABORT_FAILED) 1038 goto rel_skb; 1039 1040 cxgbi_sock_rcv_abort_rpl(csk); 1041 rel_skb: 1042 __kfree_skb(skb); 1043 } 1044 1045 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1046 { 1047 struct cxgbi_sock *csk; 1048 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1049 unsigned int tid = GET_TID(cpl); 1050 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1051 struct tid_info *t = lldi->tids; 1052 1053 csk = lookup_tid(t, tid); 1054 if (!csk) { 1055 pr_err("can't find connection for tid %u.\n", tid); 1056 } else { 1057 /* not expecting this, reset the connection. */ 1058 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1059 spin_lock_bh(&csk->lock); 1060 send_abort_req(csk); 1061 spin_unlock_bh(&csk->lock); 1062 } 1063 __kfree_skb(skb); 1064 } 1065 1066 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1067 { 1068 struct cxgbi_sock *csk; 1069 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1070 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1071 unsigned int tid = GET_TID(cpl); 1072 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1073 struct tid_info *t = lldi->tids; 1074 1075 csk = lookup_tid(t, tid); 1076 if (unlikely(!csk)) { 1077 pr_err("can't find conn. for tid %u.\n", tid); 1078 goto rel_skb; 1079 } 1080 1081 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1082 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1083 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1084 pdu_len_ddp); 1085 1086 spin_lock_bh(&csk->lock); 1087 1088 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1089 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1090 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1091 csk, csk->state, csk->flags, csk->tid); 1092 if (csk->state != CTP_ABORTING) 1093 goto abort_conn; 1094 else 1095 goto discard; 1096 } 1097 1098 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1099 cxgbi_skcb_flags(skb) = 0; 1100 1101 skb_reset_transport_header(skb); 1102 __skb_pull(skb, sizeof(*cpl)); 1103 __pskb_trim(skb, ntohs(cpl->len)); 1104 1105 if (!csk->skb_ulp_lhdr) { 1106 unsigned char *bhs; 1107 unsigned int hlen, dlen, plen; 1108 1109 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1110 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1111 csk, csk->state, csk->flags, csk->tid, skb); 1112 csk->skb_ulp_lhdr = skb; 1113 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1114 1115 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1116 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1117 csk->tid, cxgbi_skcb_tcp_seq(skb), 1118 csk->rcv_nxt); 1119 goto abort_conn; 1120 } 1121 1122 bhs = skb->data; 1123 hlen = ntohs(cpl->len); 1124 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1125 1126 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1127 if (is_t4(lldi->adapter_type)) 1128 plen -= 40; 1129 1130 if ((hlen + dlen) != plen) { 1131 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1132 "mismatch %u != %u + %u, seq 0x%x.\n", 1133 csk->tid, plen, hlen, dlen, 1134 cxgbi_skcb_tcp_seq(skb)); 1135 goto abort_conn; 1136 } 1137 1138 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1139 if (dlen) 1140 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1141 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1142 1143 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1144 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1145 csk, skb, *bhs, hlen, dlen, 1146 ntohl(*((unsigned int *)(bhs + 16))), 1147 ntohl(*((unsigned int *)(bhs + 24)))); 1148 1149 } else { 1150 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1151 1152 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1153 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1154 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1155 csk, csk->state, csk->flags, skb, lskb); 1156 } 1157 1158 __skb_queue_tail(&csk->receive_queue, skb); 1159 spin_unlock_bh(&csk->lock); 1160 return; 1161 1162 abort_conn: 1163 send_abort_req(csk); 1164 discard: 1165 spin_unlock_bh(&csk->lock); 1166 rel_skb: 1167 __kfree_skb(skb); 1168 } 1169 1170 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1171 struct sk_buff *skb) 1172 { 1173 struct cxgbi_sock *csk; 1174 struct sk_buff *lskb; 1175 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1176 unsigned int tid = GET_TID(rpl); 1177 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1178 struct tid_info *t = lldi->tids; 1179 unsigned int status = ntohl(rpl->ddpvld); 1180 1181 csk = lookup_tid(t, tid); 1182 if (unlikely(!csk)) { 1183 pr_err("can't find connection for tid %u.\n", tid); 1184 goto rel_skb; 1185 } 1186 1187 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1188 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1189 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1190 1191 spin_lock_bh(&csk->lock); 1192 1193 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1194 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1195 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1196 csk, csk->state, csk->flags, csk->tid); 1197 if (csk->state != CTP_ABORTING) 1198 goto abort_conn; 1199 else 1200 goto discard; 1201 } 1202 1203 if (!csk->skb_ulp_lhdr) { 1204 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1205 goto abort_conn; 1206 } 1207 1208 lskb = csk->skb_ulp_lhdr; 1209 csk->skb_ulp_lhdr = NULL; 1210 1211 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1212 1213 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1214 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1215 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1216 1217 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1218 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1219 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1220 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1221 } 1222 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1223 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1224 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1225 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1226 } 1227 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1228 log_debug(1 << CXGBI_DBG_PDU_RX, 1229 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1230 csk, lskb, status); 1231 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1232 } 1233 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1234 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1235 log_debug(1 << CXGBI_DBG_PDU_RX, 1236 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1237 csk, lskb, status); 1238 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1239 } 1240 log_debug(1 << CXGBI_DBG_PDU_RX, 1241 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1242 csk, lskb, cxgbi_skcb_flags(lskb)); 1243 1244 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1245 cxgbi_conn_pdu_ready(csk); 1246 spin_unlock_bh(&csk->lock); 1247 goto rel_skb; 1248 1249 abort_conn: 1250 send_abort_req(csk); 1251 discard: 1252 spin_unlock_bh(&csk->lock); 1253 rel_skb: 1254 __kfree_skb(skb); 1255 } 1256 1257 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1258 { 1259 struct cxgbi_sock *csk; 1260 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1261 unsigned int tid = GET_TID(rpl); 1262 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1263 struct tid_info *t = lldi->tids; 1264 1265 csk = lookup_tid(t, tid); 1266 if (unlikely(!csk)) 1267 pr_err("can't find connection for tid %u.\n", tid); 1268 else { 1269 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1270 "csk 0x%p,%u,0x%lx,%u.\n", 1271 csk, csk->state, csk->flags, csk->tid); 1272 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1273 rpl->seq_vld); 1274 } 1275 __kfree_skb(skb); 1276 } 1277 1278 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1279 { 1280 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1281 unsigned int tid = GET_TID(rpl); 1282 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1283 struct tid_info *t = lldi->tids; 1284 struct cxgbi_sock *csk; 1285 1286 csk = lookup_tid(t, tid); 1287 if (!csk) 1288 pr_err("can't find conn. for tid %u.\n", tid); 1289 1290 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1291 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1292 csk, csk->state, csk->flags, csk->tid, rpl->status); 1293 1294 if (rpl->status != CPL_ERR_NONE) 1295 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1296 csk, tid, rpl->status); 1297 1298 __kfree_skb(skb); 1299 } 1300 1301 static int alloc_cpls(struct cxgbi_sock *csk) 1302 { 1303 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1304 0, GFP_KERNEL); 1305 if (!csk->cpl_close) 1306 return -ENOMEM; 1307 1308 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1309 0, GFP_KERNEL); 1310 if (!csk->cpl_abort_req) 1311 goto free_cpls; 1312 1313 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1314 0, GFP_KERNEL); 1315 if (!csk->cpl_abort_rpl) 1316 goto free_cpls; 1317 return 0; 1318 1319 free_cpls: 1320 cxgbi_sock_free_cpl_skbs(csk); 1321 return -ENOMEM; 1322 } 1323 1324 static inline void l2t_put(struct cxgbi_sock *csk) 1325 { 1326 if (csk->l2t) { 1327 cxgb4_l2t_release(csk->l2t); 1328 csk->l2t = NULL; 1329 cxgbi_sock_put(csk); 1330 } 1331 } 1332 1333 static void release_offload_resources(struct cxgbi_sock *csk) 1334 { 1335 struct cxgb4_lld_info *lldi; 1336 #if IS_ENABLED(CONFIG_IPV6) 1337 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1338 #endif 1339 1340 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1341 "csk 0x%p,%u,0x%lx,%u.\n", 1342 csk, csk->state, csk->flags, csk->tid); 1343 1344 cxgbi_sock_free_cpl_skbs(csk); 1345 if (csk->wr_cred != csk->wr_max_cred) { 1346 cxgbi_sock_purge_wr_queue(csk); 1347 cxgbi_sock_reset_wr_list(csk); 1348 } 1349 1350 l2t_put(csk); 1351 #if IS_ENABLED(CONFIG_IPV6) 1352 if (csk->csk_family == AF_INET6) 1353 cxgb4_clip_release(ndev, 1354 (const u32 *)&csk->saddr6.sin6_addr, 1); 1355 #endif 1356 1357 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1358 free_atid(csk); 1359 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1360 lldi = cxgbi_cdev_priv(csk->cdev); 1361 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1362 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1363 cxgbi_sock_put(csk); 1364 } 1365 csk->dst = NULL; 1366 csk->cdev = NULL; 1367 } 1368 1369 static int init_act_open(struct cxgbi_sock *csk) 1370 { 1371 struct cxgbi_device *cdev = csk->cdev; 1372 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1373 struct net_device *ndev = cdev->ports[csk->port_id]; 1374 struct sk_buff *skb = NULL; 1375 struct neighbour *n = NULL; 1376 void *daddr; 1377 unsigned int step; 1378 unsigned int size, size6; 1379 int t4 = is_t4(lldi->adapter_type); 1380 unsigned int linkspeed; 1381 unsigned int rcv_winf, snd_winf; 1382 1383 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1384 "csk 0x%p,%u,0x%lx,%u.\n", 1385 csk, csk->state, csk->flags, csk->tid); 1386 1387 if (csk->csk_family == AF_INET) 1388 daddr = &csk->daddr.sin_addr.s_addr; 1389 #if IS_ENABLED(CONFIG_IPV6) 1390 else if (csk->csk_family == AF_INET6) 1391 daddr = &csk->daddr6.sin6_addr; 1392 #endif 1393 else { 1394 pr_err("address family 0x%x not supported\n", csk->csk_family); 1395 goto rel_resource; 1396 } 1397 1398 n = dst_neigh_lookup(csk->dst, daddr); 1399 1400 if (!n) { 1401 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1402 goto rel_resource; 1403 } 1404 1405 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1406 if (csk->atid < 0) { 1407 pr_err("%s, NO atid available.\n", ndev->name); 1408 return -EINVAL; 1409 } 1410 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1411 cxgbi_sock_get(csk); 1412 1413 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1414 if (!csk->l2t) { 1415 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1416 goto rel_resource_without_clip; 1417 } 1418 cxgbi_sock_get(csk); 1419 1420 #if IS_ENABLED(CONFIG_IPV6) 1421 if (csk->csk_family == AF_INET6) 1422 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1423 #endif 1424 1425 if (t4) { 1426 size = sizeof(struct cpl_act_open_req); 1427 size6 = sizeof(struct cpl_act_open_req6); 1428 } else { 1429 size = sizeof(struct cpl_t5_act_open_req); 1430 size6 = sizeof(struct cpl_t5_act_open_req6); 1431 } 1432 1433 if (csk->csk_family == AF_INET) 1434 skb = alloc_wr(size, 0, GFP_NOIO); 1435 #if IS_ENABLED(CONFIG_IPV6) 1436 else 1437 skb = alloc_wr(size6, 0, GFP_NOIO); 1438 #endif 1439 1440 if (!skb) 1441 goto rel_resource; 1442 skb->sk = (struct sock *)csk; 1443 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1444 1445 if (!csk->mtu) 1446 csk->mtu = dst_mtu(csk->dst); 1447 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1448 csk->tx_chan = cxgb4_port_chan(ndev); 1449 /* SMT two entries per row */ 1450 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1451 step = lldi->ntxq / lldi->nchan; 1452 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1453 step = lldi->nrxq / lldi->nchan; 1454 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1455 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; 1456 csk->snd_win = cxgb4i_snd_win; 1457 csk->rcv_win = cxgb4i_rcv_win; 1458 if (cxgb4i_rcv_win <= 0) { 1459 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; 1460 rcv_winf = linkspeed / SPEED_10000; 1461 if (rcv_winf) 1462 csk->rcv_win *= rcv_winf; 1463 } 1464 if (cxgb4i_snd_win <= 0) { 1465 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; 1466 snd_winf = linkspeed / SPEED_10000; 1467 if (snd_winf) 1468 csk->snd_win *= snd_winf; 1469 } 1470 csk->wr_cred = lldi->wr_cred - 1471 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1472 csk->wr_max_cred = csk->wr_cred; 1473 csk->wr_una_cred = 0; 1474 cxgbi_sock_reset_wr_list(csk); 1475 csk->err = 0; 1476 1477 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1478 (&csk->saddr), (&csk->daddr), csk, csk->state, 1479 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1480 csk->mtu, csk->mss_idx, csk->smac_idx); 1481 1482 /* must wait for either a act_open_rpl or act_open_establish */ 1483 try_module_get(THIS_MODULE); 1484 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1485 if (csk->csk_family == AF_INET) 1486 send_act_open_req(csk, skb, csk->l2t); 1487 #if IS_ENABLED(CONFIG_IPV6) 1488 else 1489 send_act_open_req6(csk, skb, csk->l2t); 1490 #endif 1491 neigh_release(n); 1492 1493 return 0; 1494 1495 rel_resource: 1496 #if IS_ENABLED(CONFIG_IPV6) 1497 if (csk->csk_family == AF_INET6) 1498 cxgb4_clip_release(ndev, 1499 (const u32 *)&csk->saddr6.sin6_addr, 1); 1500 #endif 1501 rel_resource_without_clip: 1502 if (n) 1503 neigh_release(n); 1504 if (skb) 1505 __kfree_skb(skb); 1506 return -EINVAL; 1507 } 1508 1509 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1510 [CPL_ACT_ESTABLISH] = do_act_establish, 1511 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1512 [CPL_PEER_CLOSE] = do_peer_close, 1513 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1514 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1515 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1516 [CPL_FW4_ACK] = do_fw4_ack, 1517 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1518 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1519 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1520 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1521 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1522 [CPL_RX_DATA] = do_rx_data, 1523 }; 1524 1525 static int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1526 { 1527 int rc; 1528 1529 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1530 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1531 1532 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1533 cxgb4i_max_connect); 1534 if (rc < 0) 1535 return rc; 1536 1537 cdev->csk_release_offload_resources = release_offload_resources; 1538 cdev->csk_push_tx_frames = push_tx_frames; 1539 cdev->csk_send_abort_req = send_abort_req; 1540 cdev->csk_send_close_req = send_close_req; 1541 cdev->csk_send_rx_credits = send_rx_credits; 1542 cdev->csk_alloc_cpls = alloc_cpls; 1543 cdev->csk_init_act_open = init_act_open; 1544 1545 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1546 return 0; 1547 } 1548 1549 static inline void 1550 ulp_mem_io_set_hdr(struct cxgbi_device *cdev, 1551 struct ulp_mem_io *req, 1552 unsigned int wr_len, unsigned int dlen, 1553 unsigned int pm_addr, 1554 int tid) 1555 { 1556 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1557 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1558 1559 INIT_ULPTX_WR(req, wr_len, 0, tid); 1560 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | 1561 FW_WR_ATOMIC_V(0)); 1562 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1563 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | 1564 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); 1565 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1566 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1567 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1568 1569 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1570 idata->len = htonl(dlen); 1571 } 1572 1573 static struct sk_buff * 1574 ddp_ppod_init_idata(struct cxgbi_device *cdev, 1575 struct cxgbi_ppm *ppm, 1576 unsigned int idx, unsigned int npods, 1577 unsigned int tid) 1578 { 1579 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1580 unsigned int dlen = npods << PPOD_SIZE_SHIFT; 1581 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1582 sizeof(struct ulptx_idata) + dlen, 16); 1583 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1584 1585 if (!skb) { 1586 pr_err("%s: %s idx %u, npods %u, OOM.\n", 1587 __func__, ppm->ndev->name, idx, npods); 1588 return NULL; 1589 } 1590 1591 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, 1592 pm_addr, tid); 1593 1594 return skb; 1595 } 1596 1597 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1598 struct cxgbi_task_tag_info *ttinfo, 1599 unsigned int idx, unsigned int npods, 1600 struct scatterlist **sg_pp, 1601 unsigned int *sg_off) 1602 { 1603 struct cxgbi_device *cdev = csk->cdev; 1604 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, 1605 csk->tid); 1606 struct ulp_mem_io *req; 1607 struct ulptx_idata *idata; 1608 struct cxgbi_pagepod *ppod; 1609 int i; 1610 1611 if (!skb) 1612 return -ENOMEM; 1613 1614 req = (struct ulp_mem_io *)skb->head; 1615 idata = (struct ulptx_idata *)(req + 1); 1616 ppod = (struct cxgbi_pagepod *)(idata + 1); 1617 1618 for (i = 0; i < npods; i++, ppod++) 1619 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); 1620 1621 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); 1622 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); 1623 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 1624 1625 spin_lock_bh(&csk->lock); 1626 cxgbi_sock_skb_entail(csk, skb); 1627 spin_unlock_bh(&csk->lock); 1628 1629 return 0; 1630 } 1631 1632 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1633 struct cxgbi_task_tag_info *ttinfo) 1634 { 1635 unsigned int pidx = ttinfo->idx; 1636 unsigned int npods = ttinfo->npods; 1637 unsigned int i, cnt; 1638 int err = 0; 1639 struct scatterlist *sg = ttinfo->sgl; 1640 unsigned int offset = 0; 1641 1642 ttinfo->cid = csk->port_id; 1643 1644 for (i = 0; i < npods; i += cnt, pidx += cnt) { 1645 cnt = npods - i; 1646 1647 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1648 cnt = ULPMEM_IDATA_MAX_NPPODS; 1649 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, 1650 &sg, &offset); 1651 if (err < 0) 1652 break; 1653 } 1654 1655 return err; 1656 } 1657 1658 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1659 int pg_idx, bool reply) 1660 { 1661 struct sk_buff *skb; 1662 struct cpl_set_tcb_field *req; 1663 1664 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1665 return 0; 1666 1667 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1668 if (!skb) 1669 return -ENOMEM; 1670 1671 /* set up ulp page size */ 1672 req = (struct cpl_set_tcb_field *)skb->head; 1673 INIT_TP_WR(req, csk->tid); 1674 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1675 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1676 req->word_cookie = htons(0); 1677 req->mask = cpu_to_be64(0x3 << 8); 1678 req->val = cpu_to_be64(pg_idx << 8); 1679 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1680 1681 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1682 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1683 1684 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1685 return 0; 1686 } 1687 1688 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1689 int hcrc, int dcrc, int reply) 1690 { 1691 struct sk_buff *skb; 1692 struct cpl_set_tcb_field *req; 1693 1694 if (!hcrc && !dcrc) 1695 return 0; 1696 1697 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1698 if (!skb) 1699 return -ENOMEM; 1700 1701 csk->hcrc_len = (hcrc ? 4 : 0); 1702 csk->dcrc_len = (dcrc ? 4 : 0); 1703 /* set up ulp submode */ 1704 req = (struct cpl_set_tcb_field *)skb->head; 1705 INIT_TP_WR(req, tid); 1706 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1707 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1708 req->word_cookie = htons(0); 1709 req->mask = cpu_to_be64(0x3 << 4); 1710 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1711 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1712 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1713 1714 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1715 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1716 1717 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1718 return 0; 1719 } 1720 1721 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) 1722 { 1723 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) 1724 (cxgbi_cdev_priv(cdev)))->iscsi_ppm); 1725 } 1726 1727 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1728 { 1729 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1730 struct net_device *ndev = cdev->ports[0]; 1731 struct cxgbi_tag_format tformat; 1732 unsigned int ppmax; 1733 int i; 1734 1735 if (!lldi->vr->iscsi.size) { 1736 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); 1737 return -EACCES; 1738 } 1739 1740 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; 1741 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; 1742 1743 memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); 1744 for (i = 0; i < 4; i++) 1745 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) 1746 & 0xF; 1747 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); 1748 1749 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, 1750 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); 1751 1752 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1753 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1754 cdev->csk_ddp_set_map = ddp_set_map; 1755 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1756 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1757 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1758 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); 1759 cdev->cdev2ppm = cdev2ppm; 1760 1761 return 0; 1762 } 1763 1764 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1765 { 1766 struct cxgbi_device *cdev; 1767 struct port_info *pi; 1768 int i, rc; 1769 1770 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1771 if (!cdev) { 1772 pr_info("t4 device 0x%p, register failed.\n", lldi); 1773 return NULL; 1774 } 1775 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1776 cdev, lldi->adapter_type, lldi->nports, 1777 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1778 lldi->nrxq, lldi->wr_cred); 1779 for (i = 0; i < lldi->nrxq; i++) 1780 log_debug(1 << CXGBI_DBG_DEV, 1781 "t4 0x%p, rxq id #%d: %u.\n", 1782 cdev, i, lldi->rxq_ids[i]); 1783 1784 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1785 cdev->flags = CXGBI_FLAG_DEV_T4; 1786 cdev->pdev = lldi->pdev; 1787 cdev->ports = lldi->ports; 1788 cdev->nports = lldi->nports; 1789 cdev->mtus = lldi->mtus; 1790 cdev->nmtus = NMTUS; 1791 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1792 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1793 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1794 cdev->itp = &cxgb4i_iscsi_transport; 1795 1796 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 1797 << FW_VIID_PFN_S; 1798 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1799 cdev, lldi->ports[0]->name, cdev->pfvf); 1800 1801 rc = cxgb4i_ddp_init(cdev); 1802 if (rc) { 1803 pr_info("t4 0x%p ddp init failed.\n", cdev); 1804 goto err_out; 1805 } 1806 rc = cxgb4i_ofld_init(cdev); 1807 if (rc) { 1808 pr_info("t4 0x%p ofld init failed.\n", cdev); 1809 goto err_out; 1810 } 1811 1812 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1813 &cxgb4i_host_template, cxgb4i_stt); 1814 if (rc) 1815 goto err_out; 1816 1817 for (i = 0; i < cdev->nports; i++) { 1818 pi = netdev_priv(lldi->ports[i]); 1819 cdev->hbas[i]->port_id = pi->port_id; 1820 } 1821 return cdev; 1822 1823 err_out: 1824 cxgbi_device_unregister(cdev); 1825 return ERR_PTR(-ENOMEM); 1826 } 1827 1828 #define RX_PULL_LEN 128 1829 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1830 const struct pkt_gl *pgl) 1831 { 1832 const struct cpl_act_establish *rpl; 1833 struct sk_buff *skb; 1834 unsigned int opc; 1835 struct cxgbi_device *cdev = handle; 1836 1837 if (pgl == NULL) { 1838 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1839 1840 skb = alloc_wr(len, 0, GFP_ATOMIC); 1841 if (!skb) 1842 goto nomem; 1843 skb_copy_to_linear_data(skb, &rsp[1], len); 1844 } else { 1845 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1846 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1847 pgl->va, be64_to_cpu(*rsp), 1848 be64_to_cpu(*(u64 *)pgl->va), 1849 pgl->tot_len); 1850 return 0; 1851 } 1852 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1853 if (unlikely(!skb)) 1854 goto nomem; 1855 } 1856 1857 rpl = (struct cpl_act_establish *)skb->data; 1858 opc = rpl->ot.opcode; 1859 log_debug(1 << CXGBI_DBG_TOE, 1860 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1861 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1862 if (cxgb4i_cplhandlers[opc]) 1863 cxgb4i_cplhandlers[opc](cdev, skb); 1864 else { 1865 pr_err("No handler for opcode 0x%x.\n", opc); 1866 __kfree_skb(skb); 1867 } 1868 return 0; 1869 nomem: 1870 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1871 return 1; 1872 } 1873 1874 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1875 { 1876 struct cxgbi_device *cdev = handle; 1877 1878 switch (state) { 1879 case CXGB4_STATE_UP: 1880 pr_info("cdev 0x%p, UP.\n", cdev); 1881 break; 1882 case CXGB4_STATE_START_RECOVERY: 1883 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1884 /* close all connections */ 1885 break; 1886 case CXGB4_STATE_DOWN: 1887 pr_info("cdev 0x%p, DOWN.\n", cdev); 1888 break; 1889 case CXGB4_STATE_DETACH: 1890 pr_info("cdev 0x%p, DETACH.\n", cdev); 1891 cxgbi_device_unregister(cdev); 1892 break; 1893 default: 1894 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1895 break; 1896 } 1897 return 0; 1898 } 1899 1900 static int __init cxgb4i_init_module(void) 1901 { 1902 int rc; 1903 1904 printk(KERN_INFO "%s", version); 1905 1906 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1907 if (rc < 0) 1908 return rc; 1909 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1910 1911 return 0; 1912 } 1913 1914 static void __exit cxgb4i_exit_module(void) 1915 { 1916 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1917 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1918 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1919 } 1920 1921 module_init(cxgb4i_init_module); 1922 module_exit(cxgb4i_exit_module); 1923