1 /* 2 * cxgb4i.c: Chelsio T4 iSCSI driver. 3 * 4 * Copyright (c) 2010 Chelsio Communications, Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation. 9 * 10 * Written by: Karen Xie (kxie@chelsio.com) 11 * Rakesh Ranjan (rranjan@chelsio.com) 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 15 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <scsi/scsi_host.h> 19 #include <net/tcp.h> 20 #include <net/dst.h> 21 #include <linux/netdevice.h> 22 #include <net/addrconf.h> 23 24 #include "t4_regs.h" 25 #include "t4_msg.h" 26 #include "cxgb4.h" 27 #include "cxgb4_uld.h" 28 #include "t4fw_api.h" 29 #include "l2t.h" 30 #include "cxgb4i.h" 31 #include "clip_tbl.h" 32 33 static unsigned int dbg_level; 34 35 #include "../libcxgbi.h" 36 37 #define DRV_MODULE_NAME "cxgb4i" 38 #define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver" 39 #define DRV_MODULE_VERSION "0.9.4" 40 41 static char version[] = 42 DRV_MODULE_DESC " " DRV_MODULE_NAME 43 " v" DRV_MODULE_VERSION "\n"; 44 45 MODULE_AUTHOR("Chelsio Communications, Inc."); 46 MODULE_DESCRIPTION(DRV_MODULE_DESC); 47 MODULE_VERSION(DRV_MODULE_VERSION); 48 MODULE_LICENSE("GPL"); 49 50 module_param(dbg_level, uint, 0644); 51 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 52 53 static int cxgb4i_rcv_win = 256 * 1024; 54 module_param(cxgb4i_rcv_win, int, 0644); 55 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 56 57 static int cxgb4i_snd_win = 128 * 1024; 58 module_param(cxgb4i_snd_win, int, 0644); 59 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 60 61 static int cxgb4i_rx_credit_thres = 10 * 1024; 62 module_param(cxgb4i_rx_credit_thres, int, 0644); 63 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 64 "RX credits return threshold in bytes (default=10KB)"); 65 66 static unsigned int cxgb4i_max_connect = (8 * 1024); 67 module_param(cxgb4i_max_connect, uint, 0644); 68 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 69 70 static unsigned short cxgb4i_sport_base = 20000; 71 module_param(cxgb4i_sport_base, ushort, 0644); 72 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 73 74 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 75 76 static void *t4_uld_add(const struct cxgb4_lld_info *); 77 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 78 static int t4_uld_state_change(void *, enum cxgb4_state state); 79 static inline int send_tx_flowc_wr(struct cxgbi_sock *); 80 81 static const struct cxgb4_uld_info cxgb4i_uld_info = { 82 .name = DRV_MODULE_NAME, 83 .add = t4_uld_add, 84 .rx_handler = t4_uld_rx_handler, 85 .state_change = t4_uld_state_change, 86 }; 87 88 static struct scsi_host_template cxgb4i_host_template = { 89 .module = THIS_MODULE, 90 .name = DRV_MODULE_NAME, 91 .proc_name = DRV_MODULE_NAME, 92 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 93 .queuecommand = iscsi_queuecommand, 94 .change_queue_depth = scsi_change_queue_depth, 95 .sg_tablesize = SG_ALL, 96 .max_sectors = 0xFFFF, 97 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 98 .eh_abort_handler = iscsi_eh_abort, 99 .eh_device_reset_handler = iscsi_eh_device_reset, 100 .eh_target_reset_handler = iscsi_eh_recover_target, 101 .target_alloc = iscsi_target_alloc, 102 .use_clustering = DISABLE_CLUSTERING, 103 .this_id = -1, 104 .track_queue_depth = 1, 105 }; 106 107 static struct iscsi_transport cxgb4i_iscsi_transport = { 108 .owner = THIS_MODULE, 109 .name = DRV_MODULE_NAME, 110 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 111 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 112 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 113 .attr_is_visible = cxgbi_attr_is_visible, 114 .get_host_param = cxgbi_get_host_param, 115 .set_host_param = cxgbi_set_host_param, 116 /* session management */ 117 .create_session = cxgbi_create_session, 118 .destroy_session = cxgbi_destroy_session, 119 .get_session_param = iscsi_session_get_param, 120 /* connection management */ 121 .create_conn = cxgbi_create_conn, 122 .bind_conn = cxgbi_bind_conn, 123 .destroy_conn = iscsi_tcp_conn_teardown, 124 .start_conn = iscsi_conn_start, 125 .stop_conn = iscsi_conn_stop, 126 .get_conn_param = iscsi_conn_get_param, 127 .set_param = cxgbi_set_conn_param, 128 .get_stats = cxgbi_get_conn_stats, 129 /* pdu xmit req from user space */ 130 .send_pdu = iscsi_conn_send_pdu, 131 /* task */ 132 .init_task = iscsi_tcp_task_init, 133 .xmit_task = iscsi_tcp_task_xmit, 134 .cleanup_task = cxgbi_cleanup_task, 135 /* pdu */ 136 .alloc_pdu = cxgbi_conn_alloc_pdu, 137 .init_pdu = cxgbi_conn_init_pdu, 138 .xmit_pdu = cxgbi_conn_xmit_pdu, 139 .parse_pdu_itt = cxgbi_parse_pdu_itt, 140 /* TCP connect/disconnect */ 141 .get_ep_param = cxgbi_get_ep_param, 142 .ep_connect = cxgbi_ep_connect, 143 .ep_poll = cxgbi_ep_poll, 144 .ep_disconnect = cxgbi_ep_disconnect, 145 /* Error recovery timeout call */ 146 .session_recovery_timedout = iscsi_session_recovery_timedout, 147 }; 148 149 static struct scsi_transport_template *cxgb4i_stt; 150 151 /* 152 * CPL (Chelsio Protocol Language) defines a message passing interface between 153 * the host driver and Chelsio asic. 154 * The section below implments CPLs that related to iscsi tcp connection 155 * open/close/abort and data send/receive. 156 */ 157 158 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 159 #define RCV_BUFSIZ_MASK 0x3FFU 160 #define MAX_IMM_TX_PKT_LEN 128 161 162 static int push_tx_frames(struct cxgbi_sock *, int); 163 164 /* 165 * is_ofld_imm - check whether a packet can be sent as immediate data 166 * @skb: the packet 167 * 168 * Returns true if a packet can be sent as an offload WR with immediate 169 * data. We currently use the same limit as for Ethernet packets. 170 */ 171 static inline bool is_ofld_imm(const struct sk_buff *skb) 172 { 173 int len = skb->len; 174 175 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 176 len += sizeof(struct fw_ofld_tx_data_wr); 177 178 return len <= MAX_IMM_TX_PKT_LEN; 179 } 180 181 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 182 struct l2t_entry *e) 183 { 184 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 185 int t4 = is_t4(lldi->adapter_type); 186 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 187 unsigned long long opt0; 188 unsigned int opt2; 189 unsigned int qid_atid = ((unsigned int)csk->atid) | 190 (((unsigned int)csk->rss_qid) << 14); 191 192 opt0 = KEEP_ALIVE_F | 193 WND_SCALE_V(wscale) | 194 MSS_IDX_V(csk->mss_idx) | 195 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 196 TX_CHAN_V(csk->tx_chan) | 197 SMAC_SEL_V(csk->smac_idx) | 198 ULP_MODE_V(ULP_MODE_ISCSI) | 199 RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10); 200 opt2 = RX_CHANNEL_V(0) | 201 RSS_QUEUE_VALID_F | 202 (RX_FC_DISABLE_F) | 203 RSS_QUEUE_V(csk->rss_qid); 204 205 if (is_t4(lldi->adapter_type)) { 206 struct cpl_act_open_req *req = 207 (struct cpl_act_open_req *)skb->head; 208 209 INIT_TP_WR(req, 0); 210 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 211 qid_atid)); 212 req->local_port = csk->saddr.sin_port; 213 req->peer_port = csk->daddr.sin_port; 214 req->local_ip = csk->saddr.sin_addr.s_addr; 215 req->peer_ip = csk->daddr.sin_addr.s_addr; 216 req->opt0 = cpu_to_be64(opt0); 217 req->params = cpu_to_be32(cxgb4_select_ntuple( 218 csk->cdev->ports[csk->port_id], 219 csk->l2t)); 220 opt2 |= RX_FC_VALID_F; 221 req->opt2 = cpu_to_be32(opt2); 222 223 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 224 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 225 csk, &req->local_ip, ntohs(req->local_port), 226 &req->peer_ip, ntohs(req->peer_port), 227 csk->atid, csk->rss_qid); 228 } else { 229 struct cpl_t5_act_open_req *req = 230 (struct cpl_t5_act_open_req *)skb->head; 231 232 INIT_TP_WR(req, 0); 233 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 234 qid_atid)); 235 req->local_port = csk->saddr.sin_port; 236 req->peer_port = csk->daddr.sin_port; 237 req->local_ip = csk->saddr.sin_addr.s_addr; 238 req->peer_ip = csk->daddr.sin_addr.s_addr; 239 req->opt0 = cpu_to_be64(opt0); 240 req->params = cpu_to_be64(FILTER_TUPLE_V( 241 cxgb4_select_ntuple( 242 csk->cdev->ports[csk->port_id], 243 csk->l2t))); 244 opt2 |= 1 << 31; 245 req->opt2 = cpu_to_be32(opt2); 246 247 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 248 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 249 csk, &req->local_ip, ntohs(req->local_port), 250 &req->peer_ip, ntohs(req->peer_port), 251 csk->atid, csk->rss_qid); 252 } 253 254 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 255 256 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 257 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk, 258 csk->state, csk->flags, csk->atid, csk->rss_qid); 259 260 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 261 } 262 263 #if IS_ENABLED(CONFIG_IPV6) 264 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 265 struct l2t_entry *e) 266 { 267 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 268 int t4 = is_t4(lldi->adapter_type); 269 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 270 unsigned long long opt0; 271 unsigned int opt2; 272 unsigned int qid_atid = ((unsigned int)csk->atid) | 273 (((unsigned int)csk->rss_qid) << 14); 274 275 opt0 = KEEP_ALIVE_F | 276 WND_SCALE_V(wscale) | 277 MSS_IDX_V(csk->mss_idx) | 278 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 279 TX_CHAN_V(csk->tx_chan) | 280 SMAC_SEL_V(csk->smac_idx) | 281 ULP_MODE_V(ULP_MODE_ISCSI) | 282 RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10); 283 284 opt2 = RX_CHANNEL_V(0) | 285 RSS_QUEUE_VALID_F | 286 RX_FC_DISABLE_F | 287 RSS_QUEUE_V(csk->rss_qid); 288 289 if (t4) { 290 struct cpl_act_open_req6 *req = 291 (struct cpl_act_open_req6 *)skb->head; 292 293 INIT_TP_WR(req, 0); 294 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 295 qid_atid)); 296 req->local_port = csk->saddr6.sin6_port; 297 req->peer_port = csk->daddr6.sin6_port; 298 299 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 300 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 301 8); 302 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 303 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 304 8); 305 306 req->opt0 = cpu_to_be64(opt0); 307 308 opt2 |= RX_FC_VALID_F; 309 req->opt2 = cpu_to_be32(opt2); 310 311 req->params = cpu_to_be32(cxgb4_select_ntuple( 312 csk->cdev->ports[csk->port_id], 313 csk->l2t)); 314 } else { 315 struct cpl_t5_act_open_req6 *req = 316 (struct cpl_t5_act_open_req6 *)skb->head; 317 318 INIT_TP_WR(req, 0); 319 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 320 qid_atid)); 321 req->local_port = csk->saddr6.sin6_port; 322 req->peer_port = csk->daddr6.sin6_port; 323 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 324 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 325 8); 326 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 327 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 328 8); 329 req->opt0 = cpu_to_be64(opt0); 330 331 opt2 |= T5_OPT_2_VALID_F; 332 req->opt2 = cpu_to_be32(opt2); 333 334 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 335 csk->cdev->ports[csk->port_id], 336 csk->l2t))); 337 } 338 339 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 340 341 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 342 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid, 343 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 344 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 345 csk->rss_qid); 346 347 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 348 } 349 #endif 350 351 static void send_close_req(struct cxgbi_sock *csk) 352 { 353 struct sk_buff *skb = csk->cpl_close; 354 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 355 unsigned int tid = csk->tid; 356 357 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 358 "csk 0x%p,%u,0x%lx, tid %u.\n", 359 csk, csk->state, csk->flags, csk->tid); 360 csk->cpl_close = NULL; 361 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 362 INIT_TP_WR(req, tid); 363 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 364 req->rsvd = 0; 365 366 cxgbi_sock_skb_entail(csk, skb); 367 if (csk->state >= CTP_ESTABLISHED) 368 push_tx_frames(csk, 1); 369 } 370 371 static void abort_arp_failure(void *handle, struct sk_buff *skb) 372 { 373 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 374 struct cpl_abort_req *req; 375 376 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 377 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 378 csk, csk->state, csk->flags, csk->tid); 379 req = (struct cpl_abort_req *)skb->data; 380 req->cmd = CPL_ABORT_NO_RST; 381 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 382 } 383 384 static void send_abort_req(struct cxgbi_sock *csk) 385 { 386 struct cpl_abort_req *req; 387 struct sk_buff *skb = csk->cpl_abort_req; 388 389 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 390 return; 391 392 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 393 send_tx_flowc_wr(csk); 394 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 395 } 396 397 cxgbi_sock_set_state(csk, CTP_ABORTING); 398 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 399 cxgbi_sock_purge_write_queue(csk); 400 401 csk->cpl_abort_req = NULL; 402 req = (struct cpl_abort_req *)skb->head; 403 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 404 req->cmd = CPL_ABORT_SEND_RST; 405 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 406 INIT_TP_WR(req, csk->tid); 407 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 408 req->rsvd0 = htonl(csk->snd_nxt); 409 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 410 411 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 412 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 413 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 414 req->rsvd1); 415 416 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 417 } 418 419 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 420 { 421 struct sk_buff *skb = csk->cpl_abort_rpl; 422 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 423 424 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 425 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 426 csk, csk->state, csk->flags, csk->tid, rst_status); 427 428 csk->cpl_abort_rpl = NULL; 429 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 430 INIT_TP_WR(rpl, csk->tid); 431 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 432 rpl->cmd = rst_status; 433 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 434 } 435 436 /* 437 * CPL connection rx data ack: host -> 438 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 439 * credits sent. 440 */ 441 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 442 { 443 struct sk_buff *skb; 444 struct cpl_rx_data_ack *req; 445 446 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 447 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 448 csk, csk->state, csk->flags, csk->tid, credits); 449 450 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 451 if (!skb) { 452 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 453 return 0; 454 } 455 req = (struct cpl_rx_data_ack *)skb->head; 456 457 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 458 INIT_TP_WR(req, csk->tid); 459 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 460 csk->tid)); 461 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) 462 | RX_FORCE_ACK_F); 463 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 464 return credits; 465 } 466 467 /* 468 * sgl_len - calculates the size of an SGL of the given capacity 469 * @n: the number of SGL entries 470 * Calculates the number of flits needed for a scatter/gather list that 471 * can hold the given number of entries. 472 */ 473 static inline unsigned int sgl_len(unsigned int n) 474 { 475 n--; 476 return (3 * n) / 2 + (n & 1) + 2; 477 } 478 479 /* 480 * calc_tx_flits_ofld - calculate # of flits for an offload packet 481 * @skb: the packet 482 * 483 * Returns the number of flits needed for the given offload packet. 484 * These packets are already fully constructed and no additional headers 485 * will be added. 486 */ 487 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 488 { 489 unsigned int flits, cnt; 490 491 if (is_ofld_imm(skb)) 492 return DIV_ROUND_UP(skb->len, 8); 493 flits = skb_transport_offset(skb) / 8; 494 cnt = skb_shinfo(skb)->nr_frags; 495 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 496 cnt++; 497 return flits + sgl_len(cnt); 498 } 499 500 #define FLOWC_WR_NPARAMS_MIN 9 501 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) 502 { 503 int nparams, flowclen16, flowclen; 504 505 nparams = FLOWC_WR_NPARAMS_MIN; 506 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 507 flowclen16 = DIV_ROUND_UP(flowclen, 16); 508 flowclen = flowclen16 * 16; 509 /* 510 * Return the number of 16-byte credits used by the FlowC request. 511 * Pass back the nparams and actual FlowC length if requested. 512 */ 513 if (nparamsp) 514 *nparamsp = nparams; 515 if (flowclenp) 516 *flowclenp = flowclen; 517 518 return flowclen16; 519 } 520 521 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) 522 { 523 struct sk_buff *skb; 524 struct fw_flowc_wr *flowc; 525 int nparams, flowclen16, flowclen; 526 527 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); 528 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 529 flowc = (struct fw_flowc_wr *)skb->head; 530 flowc->op_to_nparams = 531 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); 532 flowc->flowid_len16 = 533 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); 534 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 535 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 536 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 537 flowc->mnemval[1].val = htonl(csk->tx_chan); 538 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 539 flowc->mnemval[2].val = htonl(csk->tx_chan); 540 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 541 flowc->mnemval[3].val = htonl(csk->rss_qid); 542 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 543 flowc->mnemval[4].val = htonl(csk->snd_nxt); 544 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 545 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 546 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 547 flowc->mnemval[6].val = htonl(cxgb4i_snd_win); 548 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 549 flowc->mnemval[7].val = htonl(csk->advmss); 550 flowc->mnemval[8].mnemonic = 0; 551 flowc->mnemval[8].val = 0; 552 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 553 flowc->mnemval[8].val = 16384; 554 555 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 556 557 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 558 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 559 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 560 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, 561 csk->advmss); 562 563 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 564 565 return flowclen16; 566 } 567 568 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 569 int dlen, int len, u32 credits, int compl) 570 { 571 struct fw_ofld_tx_data_wr *req; 572 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 573 unsigned int wr_ulp_mode = 0, val; 574 bool imm = is_ofld_imm(skb); 575 576 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 577 578 if (imm) { 579 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 580 FW_WR_COMPL_F | 581 FW_WR_IMMDLEN_V(dlen)); 582 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | 583 FW_WR_LEN16_V(credits)); 584 } else { 585 req->op_to_immdlen = 586 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 587 FW_WR_COMPL_F | 588 FW_WR_IMMDLEN_V(0)); 589 req->flowid_len16 = 590 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | 591 FW_WR_LEN16_V(credits)); 592 } 593 if (submode) 594 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | 595 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); 596 val = skb_peek(&csk->write_queue) ? 0 : 1; 597 req->tunnel_to_proxy = htonl(wr_ulp_mode | 598 FW_OFLD_TX_DATA_WR_SHOVE_V(val)); 599 req->plen = htonl(len); 600 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 601 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 602 } 603 604 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 605 { 606 kfree_skb(skb); 607 } 608 609 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 610 { 611 int total_size = 0; 612 struct sk_buff *skb; 613 614 if (unlikely(csk->state < CTP_ESTABLISHED || 615 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 616 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 617 1 << CXGBI_DBG_PDU_TX, 618 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 619 csk, csk->state, csk->flags, csk->tid); 620 return 0; 621 } 622 623 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 624 int dlen = skb->len; 625 int len = skb->len; 626 unsigned int credits_needed; 627 int flowclen16 = 0; 628 629 skb_reset_transport_header(skb); 630 if (is_ofld_imm(skb)) 631 credits_needed = DIV_ROUND_UP(dlen, 16); 632 else 633 credits_needed = DIV_ROUND_UP( 634 8 * calc_tx_flits_ofld(skb), 635 16); 636 637 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 638 credits_needed += DIV_ROUND_UP( 639 sizeof(struct fw_ofld_tx_data_wr), 640 16); 641 642 /* 643 * Assumes the initial credits is large enough to support 644 * fw_flowc_wr plus largest possible first payload 645 */ 646 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 647 flowclen16 = send_tx_flowc_wr(csk); 648 csk->wr_cred -= flowclen16; 649 csk->wr_una_cred += flowclen16; 650 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 651 } 652 653 if (csk->wr_cred < credits_needed) { 654 log_debug(1 << CXGBI_DBG_PDU_TX, 655 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 656 csk, skb->len, skb->data_len, 657 credits_needed, csk->wr_cred); 658 break; 659 } 660 __skb_unlink(skb, &csk->write_queue); 661 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 662 skb->csum = credits_needed + flowclen16; 663 csk->wr_cred -= credits_needed; 664 csk->wr_una_cred += credits_needed; 665 cxgbi_sock_enqueue_wr(csk, skb); 666 667 log_debug(1 << CXGBI_DBG_PDU_TX, 668 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 669 csk, skb->len, skb->data_len, credits_needed, 670 csk->wr_cred, csk->wr_una_cred); 671 672 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 673 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 674 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 675 req_completion); 676 csk->snd_nxt += len; 677 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 678 } 679 total_size += skb->truesize; 680 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 681 682 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 683 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 684 csk, csk->state, csk->flags, csk->tid, skb, len); 685 686 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 687 } 688 return total_size; 689 } 690 691 static inline void free_atid(struct cxgbi_sock *csk) 692 { 693 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 694 695 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 696 cxgb4_free_atid(lldi->tids, csk->atid); 697 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 698 cxgbi_sock_put(csk); 699 } 700 } 701 702 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 703 { 704 struct cxgbi_sock *csk; 705 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 706 unsigned short tcp_opt = ntohs(req->tcp_opt); 707 unsigned int tid = GET_TID(req); 708 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 709 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 710 struct tid_info *t = lldi->tids; 711 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 712 713 csk = lookup_atid(t, atid); 714 if (unlikely(!csk)) { 715 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 716 goto rel_skb; 717 } 718 719 if (csk->atid != atid) { 720 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 721 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 722 goto rel_skb; 723 } 724 725 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 726 (&csk->saddr), (&csk->daddr), 727 atid, tid, csk, csk->state, csk->flags, rcv_isn); 728 729 module_put(THIS_MODULE); 730 731 cxgbi_sock_get(csk); 732 csk->tid = tid; 733 cxgb4_insert_tid(lldi->tids, csk, tid); 734 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 735 736 free_atid(csk); 737 738 spin_lock_bh(&csk->lock); 739 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 740 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 741 csk, csk->state, csk->flags, csk->tid); 742 743 if (csk->retry_timer.function) { 744 del_timer(&csk->retry_timer); 745 csk->retry_timer.function = NULL; 746 } 747 748 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 749 /* 750 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 751 * pass through opt0. 752 */ 753 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) 754 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); 755 756 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 757 if (TCPOPT_TSTAMP_G(tcp_opt)) 758 csk->advmss -= 12; 759 if (csk->advmss < 128) 760 csk->advmss = 128; 761 762 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 763 "csk 0x%p, mss_idx %u, advmss %u.\n", 764 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 765 766 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 767 768 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 769 send_abort_req(csk); 770 else { 771 if (skb_queue_len(&csk->write_queue)) 772 push_tx_frames(csk, 0); 773 cxgbi_conn_tx_open(csk); 774 } 775 spin_unlock_bh(&csk->lock); 776 777 rel_skb: 778 __kfree_skb(skb); 779 } 780 781 static int act_open_rpl_status_to_errno(int status) 782 { 783 switch (status) { 784 case CPL_ERR_CONN_RESET: 785 return -ECONNREFUSED; 786 case CPL_ERR_ARP_MISS: 787 return -EHOSTUNREACH; 788 case CPL_ERR_CONN_TIMEDOUT: 789 return -ETIMEDOUT; 790 case CPL_ERR_TCAM_FULL: 791 return -ENOMEM; 792 case CPL_ERR_CONN_EXIST: 793 return -EADDRINUSE; 794 default: 795 return -EIO; 796 } 797 } 798 799 static void csk_act_open_retry_timer(unsigned long data) 800 { 801 struct sk_buff *skb = NULL; 802 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 803 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 804 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 805 struct l2t_entry *); 806 int t4 = is_t4(lldi->adapter_type), size, size6; 807 808 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 809 "csk 0x%p,%u,0x%lx,%u.\n", 810 csk, csk->state, csk->flags, csk->tid); 811 812 cxgbi_sock_get(csk); 813 spin_lock_bh(&csk->lock); 814 815 if (t4) { 816 size = sizeof(struct cpl_act_open_req); 817 size6 = sizeof(struct cpl_act_open_req6); 818 } else { 819 size = sizeof(struct cpl_t5_act_open_req); 820 size6 = sizeof(struct cpl_t5_act_open_req6); 821 } 822 823 if (csk->csk_family == AF_INET) { 824 send_act_open_func = send_act_open_req; 825 skb = alloc_wr(size, 0, GFP_ATOMIC); 826 #if IS_ENABLED(CONFIG_IPV6) 827 } else { 828 send_act_open_func = send_act_open_req6; 829 skb = alloc_wr(size6, 0, GFP_ATOMIC); 830 #endif 831 } 832 833 if (!skb) 834 cxgbi_sock_fail_act_open(csk, -ENOMEM); 835 else { 836 skb->sk = (struct sock *)csk; 837 t4_set_arp_err_handler(skb, csk, 838 cxgbi_sock_act_open_req_arp_failure); 839 send_act_open_func(csk, skb, csk->l2t); 840 } 841 842 spin_unlock_bh(&csk->lock); 843 cxgbi_sock_put(csk); 844 845 } 846 847 static inline bool is_neg_adv(unsigned int status) 848 { 849 return status == CPL_ERR_RTX_NEG_ADVICE || 850 status == CPL_ERR_KEEPALV_NEG_ADVICE || 851 status == CPL_ERR_PERSIST_NEG_ADVICE; 852 } 853 854 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 855 { 856 struct cxgbi_sock *csk; 857 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 858 unsigned int tid = GET_TID(rpl); 859 unsigned int atid = 860 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 861 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 862 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 863 struct tid_info *t = lldi->tids; 864 865 csk = lookup_atid(t, atid); 866 if (unlikely(!csk)) { 867 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 868 goto rel_skb; 869 } 870 871 pr_info_ipaddr("tid %u/%u, status %u.\n" 872 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 873 atid, tid, status, csk, csk->state, csk->flags); 874 875 if (is_neg_adv(status)) 876 goto rel_skb; 877 878 module_put(THIS_MODULE); 879 880 if (status && status != CPL_ERR_TCAM_FULL && 881 status != CPL_ERR_CONN_EXIST && 882 status != CPL_ERR_ARP_MISS) 883 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 884 885 cxgbi_sock_get(csk); 886 spin_lock_bh(&csk->lock); 887 888 if (status == CPL_ERR_CONN_EXIST && 889 csk->retry_timer.function != csk_act_open_retry_timer) { 890 csk->retry_timer.function = csk_act_open_retry_timer; 891 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 892 } else 893 cxgbi_sock_fail_act_open(csk, 894 act_open_rpl_status_to_errno(status)); 895 896 spin_unlock_bh(&csk->lock); 897 cxgbi_sock_put(csk); 898 rel_skb: 899 __kfree_skb(skb); 900 } 901 902 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 903 { 904 struct cxgbi_sock *csk; 905 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 906 unsigned int tid = GET_TID(req); 907 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 908 struct tid_info *t = lldi->tids; 909 910 csk = lookup_tid(t, tid); 911 if (unlikely(!csk)) { 912 pr_err("can't find connection for tid %u.\n", tid); 913 goto rel_skb; 914 } 915 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 916 (&csk->saddr), (&csk->daddr), 917 csk, csk->state, csk->flags, csk->tid); 918 cxgbi_sock_rcv_peer_close(csk); 919 rel_skb: 920 __kfree_skb(skb); 921 } 922 923 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 924 { 925 struct cxgbi_sock *csk; 926 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 927 unsigned int tid = GET_TID(rpl); 928 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 929 struct tid_info *t = lldi->tids; 930 931 csk = lookup_tid(t, tid); 932 if (unlikely(!csk)) { 933 pr_err("can't find connection for tid %u.\n", tid); 934 goto rel_skb; 935 } 936 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 937 (&csk->saddr), (&csk->daddr), 938 csk, csk->state, csk->flags, csk->tid); 939 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 940 rel_skb: 941 __kfree_skb(skb); 942 } 943 944 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 945 int *need_rst) 946 { 947 switch (abort_reason) { 948 case CPL_ERR_BAD_SYN: /* fall through */ 949 case CPL_ERR_CONN_RESET: 950 return csk->state > CTP_ESTABLISHED ? 951 -EPIPE : -ECONNRESET; 952 case CPL_ERR_XMIT_TIMEDOUT: 953 case CPL_ERR_PERSIST_TIMEDOUT: 954 case CPL_ERR_FINWAIT2_TIMEDOUT: 955 case CPL_ERR_KEEPALIVE_TIMEDOUT: 956 return -ETIMEDOUT; 957 default: 958 return -EIO; 959 } 960 } 961 962 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 963 { 964 struct cxgbi_sock *csk; 965 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 966 unsigned int tid = GET_TID(req); 967 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 968 struct tid_info *t = lldi->tids; 969 int rst_status = CPL_ABORT_NO_RST; 970 971 csk = lookup_tid(t, tid); 972 if (unlikely(!csk)) { 973 pr_err("can't find connection for tid %u.\n", tid); 974 goto rel_skb; 975 } 976 977 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 978 (&csk->saddr), (&csk->daddr), 979 csk, csk->state, csk->flags, csk->tid, req->status); 980 981 if (is_neg_adv(req->status)) 982 goto rel_skb; 983 984 cxgbi_sock_get(csk); 985 spin_lock_bh(&csk->lock); 986 987 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 988 989 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 990 send_tx_flowc_wr(csk); 991 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 992 } 993 994 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 995 cxgbi_sock_set_state(csk, CTP_ABORTING); 996 997 send_abort_rpl(csk, rst_status); 998 999 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1000 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1001 cxgbi_sock_closed(csk); 1002 } 1003 1004 spin_unlock_bh(&csk->lock); 1005 cxgbi_sock_put(csk); 1006 rel_skb: 1007 __kfree_skb(skb); 1008 } 1009 1010 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1011 { 1012 struct cxgbi_sock *csk; 1013 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1014 unsigned int tid = GET_TID(rpl); 1015 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1016 struct tid_info *t = lldi->tids; 1017 1018 csk = lookup_tid(t, tid); 1019 if (!csk) 1020 goto rel_skb; 1021 1022 if (csk) 1023 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1024 (&csk->saddr), (&csk->daddr), csk, 1025 csk->state, csk->flags, csk->tid, rpl->status); 1026 1027 if (rpl->status == CPL_ERR_ABORT_FAILED) 1028 goto rel_skb; 1029 1030 cxgbi_sock_rcv_abort_rpl(csk); 1031 rel_skb: 1032 __kfree_skb(skb); 1033 } 1034 1035 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1036 { 1037 struct cxgbi_sock *csk; 1038 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1039 unsigned int tid = GET_TID(cpl); 1040 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1041 struct tid_info *t = lldi->tids; 1042 1043 csk = lookup_tid(t, tid); 1044 if (!csk) { 1045 pr_err("can't find connection for tid %u.\n", tid); 1046 } else { 1047 /* not expecting this, reset the connection. */ 1048 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1049 spin_lock_bh(&csk->lock); 1050 send_abort_req(csk); 1051 spin_unlock_bh(&csk->lock); 1052 } 1053 __kfree_skb(skb); 1054 } 1055 1056 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1057 { 1058 struct cxgbi_sock *csk; 1059 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1060 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1061 unsigned int tid = GET_TID(cpl); 1062 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1063 struct tid_info *t = lldi->tids; 1064 1065 csk = lookup_tid(t, tid); 1066 if (unlikely(!csk)) { 1067 pr_err("can't find conn. for tid %u.\n", tid); 1068 goto rel_skb; 1069 } 1070 1071 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1072 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1073 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1074 pdu_len_ddp); 1075 1076 spin_lock_bh(&csk->lock); 1077 1078 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1079 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1080 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1081 csk, csk->state, csk->flags, csk->tid); 1082 if (csk->state != CTP_ABORTING) 1083 goto abort_conn; 1084 else 1085 goto discard; 1086 } 1087 1088 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1089 cxgbi_skcb_flags(skb) = 0; 1090 1091 skb_reset_transport_header(skb); 1092 __skb_pull(skb, sizeof(*cpl)); 1093 __pskb_trim(skb, ntohs(cpl->len)); 1094 1095 if (!csk->skb_ulp_lhdr) { 1096 unsigned char *bhs; 1097 unsigned int hlen, dlen, plen; 1098 1099 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1100 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1101 csk, csk->state, csk->flags, csk->tid, skb); 1102 csk->skb_ulp_lhdr = skb; 1103 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1104 1105 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1106 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1107 csk->tid, cxgbi_skcb_tcp_seq(skb), 1108 csk->rcv_nxt); 1109 goto abort_conn; 1110 } 1111 1112 bhs = skb->data; 1113 hlen = ntohs(cpl->len); 1114 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1115 1116 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1117 if (is_t4(lldi->adapter_type)) 1118 plen -= 40; 1119 1120 if ((hlen + dlen) != plen) { 1121 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1122 "mismatch %u != %u + %u, seq 0x%x.\n", 1123 csk->tid, plen, hlen, dlen, 1124 cxgbi_skcb_tcp_seq(skb)); 1125 goto abort_conn; 1126 } 1127 1128 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1129 if (dlen) 1130 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1131 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1132 1133 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1134 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1135 csk, skb, *bhs, hlen, dlen, 1136 ntohl(*((unsigned int *)(bhs + 16))), 1137 ntohl(*((unsigned int *)(bhs + 24)))); 1138 1139 } else { 1140 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1141 1142 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1143 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1144 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1145 csk, csk->state, csk->flags, skb, lskb); 1146 } 1147 1148 __skb_queue_tail(&csk->receive_queue, skb); 1149 spin_unlock_bh(&csk->lock); 1150 return; 1151 1152 abort_conn: 1153 send_abort_req(csk); 1154 discard: 1155 spin_unlock_bh(&csk->lock); 1156 rel_skb: 1157 __kfree_skb(skb); 1158 } 1159 1160 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1161 struct sk_buff *skb) 1162 { 1163 struct cxgbi_sock *csk; 1164 struct sk_buff *lskb; 1165 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1166 unsigned int tid = GET_TID(rpl); 1167 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1168 struct tid_info *t = lldi->tids; 1169 unsigned int status = ntohl(rpl->ddpvld); 1170 1171 csk = lookup_tid(t, tid); 1172 if (unlikely(!csk)) { 1173 pr_err("can't find connection for tid %u.\n", tid); 1174 goto rel_skb; 1175 } 1176 1177 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1178 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1179 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1180 1181 spin_lock_bh(&csk->lock); 1182 1183 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1184 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1185 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1186 csk, csk->state, csk->flags, csk->tid); 1187 if (csk->state != CTP_ABORTING) 1188 goto abort_conn; 1189 else 1190 goto discard; 1191 } 1192 1193 if (!csk->skb_ulp_lhdr) { 1194 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1195 goto abort_conn; 1196 } 1197 1198 lskb = csk->skb_ulp_lhdr; 1199 csk->skb_ulp_lhdr = NULL; 1200 1201 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1202 1203 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1204 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1205 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1206 1207 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1208 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1209 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1210 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1211 } 1212 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1213 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1214 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1215 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1216 } 1217 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1218 log_debug(1 << CXGBI_DBG_PDU_RX, 1219 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1220 csk, lskb, status); 1221 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1222 } 1223 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1224 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1225 log_debug(1 << CXGBI_DBG_PDU_RX, 1226 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1227 csk, lskb, status); 1228 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1229 } 1230 log_debug(1 << CXGBI_DBG_PDU_RX, 1231 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1232 csk, lskb, cxgbi_skcb_flags(lskb)); 1233 1234 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1235 cxgbi_conn_pdu_ready(csk); 1236 spin_unlock_bh(&csk->lock); 1237 goto rel_skb; 1238 1239 abort_conn: 1240 send_abort_req(csk); 1241 discard: 1242 spin_unlock_bh(&csk->lock); 1243 rel_skb: 1244 __kfree_skb(skb); 1245 } 1246 1247 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1248 { 1249 struct cxgbi_sock *csk; 1250 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1251 unsigned int tid = GET_TID(rpl); 1252 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1253 struct tid_info *t = lldi->tids; 1254 1255 csk = lookup_tid(t, tid); 1256 if (unlikely(!csk)) 1257 pr_err("can't find connection for tid %u.\n", tid); 1258 else { 1259 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1260 "csk 0x%p,%u,0x%lx,%u.\n", 1261 csk, csk->state, csk->flags, csk->tid); 1262 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1263 rpl->seq_vld); 1264 } 1265 __kfree_skb(skb); 1266 } 1267 1268 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1269 { 1270 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1271 unsigned int tid = GET_TID(rpl); 1272 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1273 struct tid_info *t = lldi->tids; 1274 struct cxgbi_sock *csk; 1275 1276 csk = lookup_tid(t, tid); 1277 if (!csk) 1278 pr_err("can't find conn. for tid %u.\n", tid); 1279 1280 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1281 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1282 csk, csk->state, csk->flags, csk->tid, rpl->status); 1283 1284 if (rpl->status != CPL_ERR_NONE) 1285 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1286 csk, tid, rpl->status); 1287 1288 __kfree_skb(skb); 1289 } 1290 1291 static int alloc_cpls(struct cxgbi_sock *csk) 1292 { 1293 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1294 0, GFP_KERNEL); 1295 if (!csk->cpl_close) 1296 return -ENOMEM; 1297 1298 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1299 0, GFP_KERNEL); 1300 if (!csk->cpl_abort_req) 1301 goto free_cpls; 1302 1303 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1304 0, GFP_KERNEL); 1305 if (!csk->cpl_abort_rpl) 1306 goto free_cpls; 1307 return 0; 1308 1309 free_cpls: 1310 cxgbi_sock_free_cpl_skbs(csk); 1311 return -ENOMEM; 1312 } 1313 1314 static inline void l2t_put(struct cxgbi_sock *csk) 1315 { 1316 if (csk->l2t) { 1317 cxgb4_l2t_release(csk->l2t); 1318 csk->l2t = NULL; 1319 cxgbi_sock_put(csk); 1320 } 1321 } 1322 1323 static void release_offload_resources(struct cxgbi_sock *csk) 1324 { 1325 struct cxgb4_lld_info *lldi; 1326 #if IS_ENABLED(CONFIG_IPV6) 1327 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1328 #endif 1329 1330 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1331 "csk 0x%p,%u,0x%lx,%u.\n", 1332 csk, csk->state, csk->flags, csk->tid); 1333 1334 cxgbi_sock_free_cpl_skbs(csk); 1335 if (csk->wr_cred != csk->wr_max_cred) { 1336 cxgbi_sock_purge_wr_queue(csk); 1337 cxgbi_sock_reset_wr_list(csk); 1338 } 1339 1340 l2t_put(csk); 1341 #if IS_ENABLED(CONFIG_IPV6) 1342 if (csk->csk_family == AF_INET6) 1343 cxgb4_clip_release(ndev, 1344 (const u32 *)&csk->saddr6.sin6_addr, 1); 1345 #endif 1346 1347 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1348 free_atid(csk); 1349 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1350 lldi = cxgbi_cdev_priv(csk->cdev); 1351 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1352 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1353 cxgbi_sock_put(csk); 1354 } 1355 csk->dst = NULL; 1356 csk->cdev = NULL; 1357 } 1358 1359 static int init_act_open(struct cxgbi_sock *csk) 1360 { 1361 struct cxgbi_device *cdev = csk->cdev; 1362 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1363 struct net_device *ndev = cdev->ports[csk->port_id]; 1364 struct sk_buff *skb = NULL; 1365 struct neighbour *n = NULL; 1366 void *daddr; 1367 unsigned int step; 1368 unsigned int size, size6; 1369 int t4 = is_t4(lldi->adapter_type); 1370 1371 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1372 "csk 0x%p,%u,0x%lx,%u.\n", 1373 csk, csk->state, csk->flags, csk->tid); 1374 1375 if (csk->csk_family == AF_INET) 1376 daddr = &csk->daddr.sin_addr.s_addr; 1377 #if IS_ENABLED(CONFIG_IPV6) 1378 else if (csk->csk_family == AF_INET6) 1379 daddr = &csk->daddr6.sin6_addr; 1380 #endif 1381 else { 1382 pr_err("address family 0x%x not supported\n", csk->csk_family); 1383 goto rel_resource; 1384 } 1385 1386 n = dst_neigh_lookup(csk->dst, daddr); 1387 1388 if (!n) { 1389 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1390 goto rel_resource; 1391 } 1392 1393 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1394 if (csk->atid < 0) { 1395 pr_err("%s, NO atid available.\n", ndev->name); 1396 return -EINVAL; 1397 } 1398 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1399 cxgbi_sock_get(csk); 1400 1401 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1402 if (!csk->l2t) { 1403 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1404 goto rel_resource_without_clip; 1405 } 1406 cxgbi_sock_get(csk); 1407 1408 #if IS_ENABLED(CONFIG_IPV6) 1409 if (csk->csk_family == AF_INET6) 1410 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1411 #endif 1412 1413 if (t4) { 1414 size = sizeof(struct cpl_act_open_req); 1415 size6 = sizeof(struct cpl_act_open_req6); 1416 } else { 1417 size = sizeof(struct cpl_t5_act_open_req); 1418 size6 = sizeof(struct cpl_t5_act_open_req6); 1419 } 1420 1421 if (csk->csk_family == AF_INET) 1422 skb = alloc_wr(size, 0, GFP_NOIO); 1423 #if IS_ENABLED(CONFIG_IPV6) 1424 else 1425 skb = alloc_wr(size6, 0, GFP_NOIO); 1426 #endif 1427 1428 if (!skb) 1429 goto rel_resource; 1430 skb->sk = (struct sock *)csk; 1431 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1432 1433 if (!csk->mtu) 1434 csk->mtu = dst_mtu(csk->dst); 1435 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1436 csk->tx_chan = cxgb4_port_chan(ndev); 1437 /* SMT two entries per row */ 1438 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1439 step = lldi->ntxq / lldi->nchan; 1440 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1441 step = lldi->nrxq / lldi->nchan; 1442 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1443 csk->wr_cred = lldi->wr_cred - 1444 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1445 csk->wr_max_cred = csk->wr_cred; 1446 csk->wr_una_cred = 0; 1447 cxgbi_sock_reset_wr_list(csk); 1448 csk->err = 0; 1449 1450 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1451 (&csk->saddr), (&csk->daddr), csk, csk->state, 1452 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1453 csk->mtu, csk->mss_idx, csk->smac_idx); 1454 1455 /* must wait for either a act_open_rpl or act_open_establish */ 1456 try_module_get(THIS_MODULE); 1457 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1458 if (csk->csk_family == AF_INET) 1459 send_act_open_req(csk, skb, csk->l2t); 1460 #if IS_ENABLED(CONFIG_IPV6) 1461 else 1462 send_act_open_req6(csk, skb, csk->l2t); 1463 #endif 1464 neigh_release(n); 1465 1466 return 0; 1467 1468 rel_resource: 1469 #if IS_ENABLED(CONFIG_IPV6) 1470 if (csk->csk_family == AF_INET6) 1471 cxgb4_clip_release(ndev, 1472 (const u32 *)&csk->saddr6.sin6_addr, 1); 1473 #endif 1474 rel_resource_without_clip: 1475 if (n) 1476 neigh_release(n); 1477 if (skb) 1478 __kfree_skb(skb); 1479 return -EINVAL; 1480 } 1481 1482 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1483 [CPL_ACT_ESTABLISH] = do_act_establish, 1484 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1485 [CPL_PEER_CLOSE] = do_peer_close, 1486 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1487 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1488 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1489 [CPL_FW4_ACK] = do_fw4_ack, 1490 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1491 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1492 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1493 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1494 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1495 [CPL_RX_DATA] = do_rx_data, 1496 }; 1497 1498 int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1499 { 1500 int rc; 1501 1502 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1503 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1504 1505 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1506 cxgb4i_max_connect); 1507 if (rc < 0) 1508 return rc; 1509 1510 cdev->csk_release_offload_resources = release_offload_resources; 1511 cdev->csk_push_tx_frames = push_tx_frames; 1512 cdev->csk_send_abort_req = send_abort_req; 1513 cdev->csk_send_close_req = send_close_req; 1514 cdev->csk_send_rx_credits = send_rx_credits; 1515 cdev->csk_alloc_cpls = alloc_cpls; 1516 cdev->csk_init_act_open = init_act_open; 1517 1518 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1519 return 0; 1520 } 1521 1522 /* 1523 * functions to program the pagepod in h/w 1524 */ 1525 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 1526 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi, 1527 struct ulp_mem_io *req, 1528 unsigned int wr_len, unsigned int dlen, 1529 unsigned int pm_addr) 1530 { 1531 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1532 1533 INIT_ULPTX_WR(req, wr_len, 0, 0); 1534 if (is_t4(lldi->adapter_type)) 1535 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1536 (ULP_MEMIO_ORDER_F)); 1537 else 1538 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1539 (T5_ULP_MEMIO_IMM_F)); 1540 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1541 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1542 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1543 1544 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1545 idata->len = htonl(dlen); 1546 } 1547 1548 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, 1549 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1550 unsigned int npods, 1551 struct cxgbi_gather_list *gl, 1552 unsigned int gl_pidx) 1553 { 1554 struct cxgbi_ddp_info *ddp = cdev->ddp; 1555 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1556 struct sk_buff *skb; 1557 struct ulp_mem_io *req; 1558 struct ulptx_idata *idata; 1559 struct cxgbi_pagepod *ppod; 1560 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; 1561 unsigned int dlen = PPOD_SIZE * npods; 1562 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1563 sizeof(struct ulptx_idata) + dlen, 16); 1564 unsigned int i; 1565 1566 skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1567 if (!skb) { 1568 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1569 cdev, idx, npods); 1570 return -ENOMEM; 1571 } 1572 req = (struct ulp_mem_io *)skb->head; 1573 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 1574 1575 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr); 1576 idata = (struct ulptx_idata *)(req + 1); 1577 ppod = (struct cxgbi_pagepod *)(idata + 1); 1578 1579 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1580 if (!hdr && !gl) 1581 cxgbi_ddp_ppod_clear(ppod); 1582 else 1583 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1584 } 1585 1586 cxgb4_ofld_send(cdev->ports[port_id], skb); 1587 return 0; 1588 } 1589 1590 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1591 unsigned int idx, unsigned int npods, 1592 struct cxgbi_gather_list *gl) 1593 { 1594 unsigned int i, cnt; 1595 int err = 0; 1596 1597 for (i = 0; i < npods; i += cnt, idx += cnt) { 1598 cnt = npods - i; 1599 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1600 cnt = ULPMEM_IDATA_MAX_NPPODS; 1601 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, 1602 idx, cnt, gl, 4 * i); 1603 if (err < 0) 1604 break; 1605 } 1606 return err; 1607 } 1608 1609 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1610 unsigned int idx, unsigned int npods) 1611 { 1612 unsigned int i, cnt; 1613 int err; 1614 1615 for (i = 0; i < npods; i += cnt, idx += cnt) { 1616 cnt = npods - i; 1617 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1618 cnt = ULPMEM_IDATA_MAX_NPPODS; 1619 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, 1620 idx, cnt, NULL, 0); 1621 if (err < 0) 1622 break; 1623 } 1624 } 1625 1626 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1627 int pg_idx, bool reply) 1628 { 1629 struct sk_buff *skb; 1630 struct cpl_set_tcb_field *req; 1631 1632 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1633 return 0; 1634 1635 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1636 if (!skb) 1637 return -ENOMEM; 1638 1639 /* set up ulp page size */ 1640 req = (struct cpl_set_tcb_field *)skb->head; 1641 INIT_TP_WR(req, csk->tid); 1642 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1643 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1644 req->word_cookie = htons(0); 1645 req->mask = cpu_to_be64(0x3 << 8); 1646 req->val = cpu_to_be64(pg_idx << 8); 1647 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1648 1649 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1650 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1651 1652 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1653 return 0; 1654 } 1655 1656 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1657 int hcrc, int dcrc, int reply) 1658 { 1659 struct sk_buff *skb; 1660 struct cpl_set_tcb_field *req; 1661 1662 if (!hcrc && !dcrc) 1663 return 0; 1664 1665 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1666 if (!skb) 1667 return -ENOMEM; 1668 1669 csk->hcrc_len = (hcrc ? 4 : 0); 1670 csk->dcrc_len = (dcrc ? 4 : 0); 1671 /* set up ulp submode */ 1672 req = (struct cpl_set_tcb_field *)skb->head; 1673 INIT_TP_WR(req, tid); 1674 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, 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 << 4); 1678 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1679 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1680 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1681 1682 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1683 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1684 1685 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1686 return 0; 1687 } 1688 1689 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1690 { 1691 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1692 struct cxgbi_ddp_info *ddp = cdev->ddp; 1693 unsigned int tagmask, pgsz_factor[4]; 1694 int err; 1695 1696 if (ddp) { 1697 kref_get(&ddp->refcnt); 1698 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1699 cdev, cdev->ddp); 1700 return -EALREADY; 1701 } 1702 1703 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1704 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1705 lldi->iscsi_iolen, lldi->iscsi_iolen); 1706 if (err < 0) 1707 return err; 1708 1709 ddp = cdev->ddp; 1710 1711 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1712 cxgbi_ddp_page_size_factor(pgsz_factor); 1713 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1714 1715 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1716 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1717 cdev->csk_ddp_set = ddp_set_map; 1718 cdev->csk_ddp_clear = ddp_clear_map; 1719 1720 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1721 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1722 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1723 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1724 " %u/%u.\n", 1725 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1726 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1727 ddp->max_rxsz, lldi->iscsi_iolen); 1728 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1729 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1730 ddp->max_rxsz); 1731 return 0; 1732 } 1733 1734 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1735 { 1736 struct cxgbi_device *cdev; 1737 struct port_info *pi; 1738 int i, rc; 1739 1740 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1741 if (!cdev) { 1742 pr_info("t4 device 0x%p, register failed.\n", lldi); 1743 return NULL; 1744 } 1745 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1746 cdev, lldi->adapter_type, lldi->nports, 1747 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1748 lldi->nrxq, lldi->wr_cred); 1749 for (i = 0; i < lldi->nrxq; i++) 1750 log_debug(1 << CXGBI_DBG_DEV, 1751 "t4 0x%p, rxq id #%d: %u.\n", 1752 cdev, i, lldi->rxq_ids[i]); 1753 1754 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1755 cdev->flags = CXGBI_FLAG_DEV_T4; 1756 cdev->pdev = lldi->pdev; 1757 cdev->ports = lldi->ports; 1758 cdev->nports = lldi->nports; 1759 cdev->mtus = lldi->mtus; 1760 cdev->nmtus = NMTUS; 1761 cdev->snd_win = cxgb4i_snd_win; 1762 cdev->rcv_win = cxgb4i_rcv_win; 1763 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1764 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1765 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1766 cdev->itp = &cxgb4i_iscsi_transport; 1767 1768 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 1769 << FW_VIID_PFN_S; 1770 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1771 cdev, lldi->ports[0]->name, cdev->pfvf); 1772 1773 rc = cxgb4i_ddp_init(cdev); 1774 if (rc) { 1775 pr_info("t4 0x%p ddp init failed.\n", cdev); 1776 goto err_out; 1777 } 1778 rc = cxgb4i_ofld_init(cdev); 1779 if (rc) { 1780 pr_info("t4 0x%p ofld init failed.\n", cdev); 1781 goto err_out; 1782 } 1783 1784 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1785 &cxgb4i_host_template, cxgb4i_stt); 1786 if (rc) 1787 goto err_out; 1788 1789 for (i = 0; i < cdev->nports; i++) { 1790 pi = netdev_priv(lldi->ports[i]); 1791 cdev->hbas[i]->port_id = pi->port_id; 1792 } 1793 return cdev; 1794 1795 err_out: 1796 cxgbi_device_unregister(cdev); 1797 return ERR_PTR(-ENOMEM); 1798 } 1799 1800 #define RX_PULL_LEN 128 1801 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1802 const struct pkt_gl *pgl) 1803 { 1804 const struct cpl_act_establish *rpl; 1805 struct sk_buff *skb; 1806 unsigned int opc; 1807 struct cxgbi_device *cdev = handle; 1808 1809 if (pgl == NULL) { 1810 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1811 1812 skb = alloc_wr(len, 0, GFP_ATOMIC); 1813 if (!skb) 1814 goto nomem; 1815 skb_copy_to_linear_data(skb, &rsp[1], len); 1816 } else { 1817 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1818 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1819 pgl->va, be64_to_cpu(*rsp), 1820 be64_to_cpu(*(u64 *)pgl->va), 1821 pgl->tot_len); 1822 return 0; 1823 } 1824 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1825 if (unlikely(!skb)) 1826 goto nomem; 1827 } 1828 1829 rpl = (struct cpl_act_establish *)skb->data; 1830 opc = rpl->ot.opcode; 1831 log_debug(1 << CXGBI_DBG_TOE, 1832 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1833 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1834 if (cxgb4i_cplhandlers[opc]) 1835 cxgb4i_cplhandlers[opc](cdev, skb); 1836 else { 1837 pr_err("No handler for opcode 0x%x.\n", opc); 1838 __kfree_skb(skb); 1839 } 1840 return 0; 1841 nomem: 1842 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1843 return 1; 1844 } 1845 1846 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1847 { 1848 struct cxgbi_device *cdev = handle; 1849 1850 switch (state) { 1851 case CXGB4_STATE_UP: 1852 pr_info("cdev 0x%p, UP.\n", cdev); 1853 break; 1854 case CXGB4_STATE_START_RECOVERY: 1855 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1856 /* close all connections */ 1857 break; 1858 case CXGB4_STATE_DOWN: 1859 pr_info("cdev 0x%p, DOWN.\n", cdev); 1860 break; 1861 case CXGB4_STATE_DETACH: 1862 pr_info("cdev 0x%p, DETACH.\n", cdev); 1863 cxgbi_device_unregister(cdev); 1864 break; 1865 default: 1866 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1867 break; 1868 } 1869 return 0; 1870 } 1871 1872 static int __init cxgb4i_init_module(void) 1873 { 1874 int rc; 1875 1876 printk(KERN_INFO "%s", version); 1877 1878 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1879 if (rc < 0) 1880 return rc; 1881 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1882 1883 return 0; 1884 } 1885 1886 static void __exit cxgb4i_exit_module(void) 1887 { 1888 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1889 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1890 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1891 } 1892 1893 module_init(cxgb4i_init_module); 1894 module_exit(cxgb4i_exit_module); 1895