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/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 33static 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 "0.9.5-ko" 40#define DRV_MODULE_RELDATE "Apr. 2015" 41 42static char version[] = 43 DRV_MODULE_DESC " " DRV_MODULE_NAME 44 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 45 46MODULE_AUTHOR("Chelsio Communications, Inc."); 47MODULE_DESCRIPTION(DRV_MODULE_DESC); 48MODULE_VERSION(DRV_MODULE_VERSION); 49MODULE_LICENSE("GPL"); 50 51module_param(dbg_level, uint, 0644); 52MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 53 54#define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024) 55static int cxgb4i_rcv_win = -1; 56module_param(cxgb4i_rcv_win, int, 0644); 57MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 58 59#define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024) 60static int cxgb4i_snd_win = -1; 61module_param(cxgb4i_snd_win, int, 0644); 62MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 63 64static int cxgb4i_rx_credit_thres = 10 * 1024; 65module_param(cxgb4i_rx_credit_thres, int, 0644); 66MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 67 "RX credits return threshold in bytes (default=10KB)"); 68 69static unsigned int cxgb4i_max_connect = (8 * 1024); 70module_param(cxgb4i_max_connect, uint, 0644); 71MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 72 73static unsigned short cxgb4i_sport_base = 20000; 74module_param(cxgb4i_sport_base, ushort, 0644); 75MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 76 77typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 78 79static void *t4_uld_add(const struct cxgb4_lld_info *); 80static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 81static int t4_uld_state_change(void *, enum cxgb4_state state); 82static inline int send_tx_flowc_wr(struct cxgbi_sock *); 83 84static const struct cxgb4_uld_info cxgb4i_uld_info = { 85 .name = DRV_MODULE_NAME, 86 .add = t4_uld_add, 87 .rx_handler = t4_uld_rx_handler, 88 .state_change = t4_uld_state_change, 89}; 90 91static struct scsi_host_template cxgb4i_host_template = { 92 .module = THIS_MODULE, 93 .name = DRV_MODULE_NAME, 94 .proc_name = DRV_MODULE_NAME, 95 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 96 .queuecommand = iscsi_queuecommand, 97 .change_queue_depth = scsi_change_queue_depth, 98 .sg_tablesize = SG_ALL, 99 .max_sectors = 0xFFFF, 100 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 101 .eh_abort_handler = iscsi_eh_abort, 102 .eh_device_reset_handler = iscsi_eh_device_reset, 103 .eh_target_reset_handler = iscsi_eh_recover_target, 104 .target_alloc = iscsi_target_alloc, 105 .use_clustering = DISABLE_CLUSTERING, 106 .this_id = -1, 107 .track_queue_depth = 1, 108}; 109 110static struct iscsi_transport cxgb4i_iscsi_transport = { 111 .owner = THIS_MODULE, 112 .name = DRV_MODULE_NAME, 113 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 114 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 115 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 116 .attr_is_visible = cxgbi_attr_is_visible, 117 .get_host_param = cxgbi_get_host_param, 118 .set_host_param = cxgbi_set_host_param, 119 /* session management */ 120 .create_session = cxgbi_create_session, 121 .destroy_session = cxgbi_destroy_session, 122 .get_session_param = iscsi_session_get_param, 123 /* connection management */ 124 .create_conn = cxgbi_create_conn, 125 .bind_conn = cxgbi_bind_conn, 126 .destroy_conn = iscsi_tcp_conn_teardown, 127 .start_conn = iscsi_conn_start, 128 .stop_conn = iscsi_conn_stop, 129 .get_conn_param = iscsi_conn_get_param, 130 .set_param = cxgbi_set_conn_param, 131 .get_stats = cxgbi_get_conn_stats, 132 /* pdu xmit req from user space */ 133 .send_pdu = iscsi_conn_send_pdu, 134 /* task */ 135 .init_task = iscsi_tcp_task_init, 136 .xmit_task = iscsi_tcp_task_xmit, 137 .cleanup_task = cxgbi_cleanup_task, 138 /* pdu */ 139 .alloc_pdu = cxgbi_conn_alloc_pdu, 140 .init_pdu = cxgbi_conn_init_pdu, 141 .xmit_pdu = cxgbi_conn_xmit_pdu, 142 .parse_pdu_itt = cxgbi_parse_pdu_itt, 143 /* TCP connect/disconnect */ 144 .get_ep_param = cxgbi_get_ep_param, 145 .ep_connect = cxgbi_ep_connect, 146 .ep_poll = cxgbi_ep_poll, 147 .ep_disconnect = cxgbi_ep_disconnect, 148 /* Error recovery timeout call */ 149 .session_recovery_timedout = iscsi_session_recovery_timedout, 150}; 151 152static struct scsi_transport_template *cxgb4i_stt; 153 154/* 155 * CPL (Chelsio Protocol Language) defines a message passing interface between 156 * the host driver and Chelsio asic. 157 * The section below implments CPLs that related to iscsi tcp connection 158 * open/close/abort and data send/receive. 159 */ 160 161#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 162#define RCV_BUFSIZ_MASK 0x3FFU 163#define MAX_IMM_TX_PKT_LEN 256 164 165static int push_tx_frames(struct cxgbi_sock *, int); 166 167/* 168 * is_ofld_imm - check whether a packet can be sent as immediate data 169 * @skb: the packet 170 * 171 * Returns true if a packet can be sent as an offload WR with immediate 172 * data. We currently use the same limit as for Ethernet packets. 173 */ 174static inline bool is_ofld_imm(const struct sk_buff *skb) 175{ 176 int len = skb->len; 177 178 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 179 len += sizeof(struct fw_ofld_tx_data_wr); 180 181 return len <= MAX_IMM_TX_PKT_LEN; 182} 183 184static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 185 struct l2t_entry *e) 186{ 187 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 188 int t4 = is_t4(lldi->adapter_type); 189 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 190 unsigned long long opt0; 191 unsigned int opt2; 192 unsigned int qid_atid = ((unsigned int)csk->atid) | 193 (((unsigned int)csk->rss_qid) << 14); 194 195 opt0 = KEEP_ALIVE_F | 196 WND_SCALE_V(wscale) | 197 MSS_IDX_V(csk->mss_idx) | 198 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 199 TX_CHAN_V(csk->tx_chan) | 200 SMAC_SEL_V(csk->smac_idx) | 201 ULP_MODE_V(ULP_MODE_ISCSI) | 202 RCV_BUFSIZ_V(csk->rcv_win >> 10); 203 204 opt2 = RX_CHANNEL_V(0) | 205 RSS_QUEUE_VALID_F | 206 RSS_QUEUE_V(csk->rss_qid); 207 208 if (is_t4(lldi->adapter_type)) { 209 struct cpl_act_open_req *req = 210 (struct cpl_act_open_req *)skb->head; 211 212 INIT_TP_WR(req, 0); 213 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 214 qid_atid)); 215 req->local_port = csk->saddr.sin_port; 216 req->peer_port = csk->daddr.sin_port; 217 req->local_ip = csk->saddr.sin_addr.s_addr; 218 req->peer_ip = csk->daddr.sin_addr.s_addr; 219 req->opt0 = cpu_to_be64(opt0); 220 req->params = cpu_to_be32(cxgb4_select_ntuple( 221 csk->cdev->ports[csk->port_id], 222 csk->l2t)); 223 opt2 |= RX_FC_VALID_F; 224 req->opt2 = cpu_to_be32(opt2); 225 226 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 227 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 228 csk, &req->local_ip, ntohs(req->local_port), 229 &req->peer_ip, ntohs(req->peer_port), 230 csk->atid, csk->rss_qid); 231 } else { 232 struct cpl_t5_act_open_req *req = 233 (struct cpl_t5_act_open_req *)skb->head; 234 u32 isn = (prandom_u32() & ~7UL) - 1; 235 236 INIT_TP_WR(req, 0); 237 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 238 qid_atid)); 239 req->local_port = csk->saddr.sin_port; 240 req->peer_port = csk->daddr.sin_port; 241 req->local_ip = csk->saddr.sin_addr.s_addr; 242 req->peer_ip = csk->daddr.sin_addr.s_addr; 243 req->opt0 = cpu_to_be64(opt0); 244 req->params = cpu_to_be64(FILTER_TUPLE_V( 245 cxgb4_select_ntuple( 246 csk->cdev->ports[csk->port_id], 247 csk->l2t))); 248 req->rsvd = cpu_to_be32(isn); 249 opt2 |= T5_ISS_VALID; 250 opt2 |= T5_OPT_2_VALID_F; 251 252 req->opt2 = cpu_to_be32(opt2); 253 254 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 255 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 256 csk, &req->local_ip, ntohs(req->local_port), 257 &req->peer_ip, ntohs(req->peer_port), 258 csk->atid, csk->rss_qid); 259 } 260 261 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 262 263 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n", 264 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk, 265 csk->state, csk->flags, csk->atid, csk->rss_qid); 266 267 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 268} 269 270#if IS_ENABLED(CONFIG_IPV6) 271static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb, 272 struct l2t_entry *e) 273{ 274 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 275 int t4 = is_t4(lldi->adapter_type); 276 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 277 unsigned long long opt0; 278 unsigned int opt2; 279 unsigned int qid_atid = ((unsigned int)csk->atid) | 280 (((unsigned int)csk->rss_qid) << 14); 281 282 opt0 = KEEP_ALIVE_F | 283 WND_SCALE_V(wscale) | 284 MSS_IDX_V(csk->mss_idx) | 285 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) | 286 TX_CHAN_V(csk->tx_chan) | 287 SMAC_SEL_V(csk->smac_idx) | 288 ULP_MODE_V(ULP_MODE_ISCSI) | 289 RCV_BUFSIZ_V(csk->rcv_win >> 10); 290 291 opt2 = RX_CHANNEL_V(0) | 292 RSS_QUEUE_VALID_F | 293 RX_FC_DISABLE_F | 294 RSS_QUEUE_V(csk->rss_qid); 295 296 if (t4) { 297 struct cpl_act_open_req6 *req = 298 (struct cpl_act_open_req6 *)skb->head; 299 300 INIT_TP_WR(req, 0); 301 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 302 qid_atid)); 303 req->local_port = csk->saddr6.sin6_port; 304 req->peer_port = csk->daddr6.sin6_port; 305 306 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 307 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 308 8); 309 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 310 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 311 8); 312 313 req->opt0 = cpu_to_be64(opt0); 314 315 opt2 |= RX_FC_VALID_F; 316 req->opt2 = cpu_to_be32(opt2); 317 318 req->params = cpu_to_be32(cxgb4_select_ntuple( 319 csk->cdev->ports[csk->port_id], 320 csk->l2t)); 321 } else { 322 struct cpl_t5_act_open_req6 *req = 323 (struct cpl_t5_act_open_req6 *)skb->head; 324 325 INIT_TP_WR(req, 0); 326 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 327 qid_atid)); 328 req->local_port = csk->saddr6.sin6_port; 329 req->peer_port = csk->daddr6.sin6_port; 330 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr); 331 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr + 332 8); 333 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr); 334 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr + 335 8); 336 req->opt0 = cpu_to_be64(opt0); 337 338 opt2 |= T5_OPT_2_VALID_F; 339 req->opt2 = cpu_to_be32(opt2); 340 341 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple( 342 csk->cdev->ports[csk->port_id], 343 csk->l2t))); 344 } 345 346 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 347 348 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n", 349 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid, 350 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port), 351 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port), 352 csk->rss_qid); 353 354 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 355} 356#endif 357 358static void send_close_req(struct cxgbi_sock *csk) 359{ 360 struct sk_buff *skb = csk->cpl_close; 361 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 362 unsigned int tid = csk->tid; 363 364 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 365 "csk 0x%p,%u,0x%lx, tid %u.\n", 366 csk, csk->state, csk->flags, csk->tid); 367 csk->cpl_close = NULL; 368 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 369 INIT_TP_WR(req, tid); 370 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 371 req->rsvd = 0; 372 373 cxgbi_sock_skb_entail(csk, skb); 374 if (csk->state >= CTP_ESTABLISHED) 375 push_tx_frames(csk, 1); 376} 377 378static void abort_arp_failure(void *handle, struct sk_buff *skb) 379{ 380 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 381 struct cpl_abort_req *req; 382 383 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 384 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 385 csk, csk->state, csk->flags, csk->tid); 386 req = (struct cpl_abort_req *)skb->data; 387 req->cmd = CPL_ABORT_NO_RST; 388 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 389} 390 391static void send_abort_req(struct cxgbi_sock *csk) 392{ 393 struct cpl_abort_req *req; 394 struct sk_buff *skb = csk->cpl_abort_req; 395 396 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 397 return; 398 399 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 400 send_tx_flowc_wr(csk); 401 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 402 } 403 404 cxgbi_sock_set_state(csk, CTP_ABORTING); 405 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 406 cxgbi_sock_purge_write_queue(csk); 407 408 csk->cpl_abort_req = NULL; 409 req = (struct cpl_abort_req *)skb->head; 410 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 411 req->cmd = CPL_ABORT_SEND_RST; 412 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 413 INIT_TP_WR(req, csk->tid); 414 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 415 req->rsvd0 = htonl(csk->snd_nxt); 416 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 417 418 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 419 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 420 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 421 req->rsvd1); 422 423 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 424} 425 426static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 427{ 428 struct sk_buff *skb = csk->cpl_abort_rpl; 429 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 430 431 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 432 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 433 csk, csk->state, csk->flags, csk->tid, rst_status); 434 435 csk->cpl_abort_rpl = NULL; 436 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 437 INIT_TP_WR(rpl, csk->tid); 438 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 439 rpl->cmd = rst_status; 440 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 441} 442 443/* 444 * CPL connection rx data ack: host -> 445 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 446 * credits sent. 447 */ 448static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 449{ 450 struct sk_buff *skb; 451 struct cpl_rx_data_ack *req; 452 453 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 454 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 455 csk, csk->state, csk->flags, csk->tid, credits); 456 457 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 458 if (!skb) { 459 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 460 return 0; 461 } 462 req = (struct cpl_rx_data_ack *)skb->head; 463 464 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 465 INIT_TP_WR(req, csk->tid); 466 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 467 csk->tid)); 468 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) 469 | RX_FORCE_ACK_F); 470 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 471 return credits; 472} 473 474/* 475 * sgl_len - calculates the size of an SGL of the given capacity 476 * @n: the number of SGL entries 477 * Calculates the number of flits needed for a scatter/gather list that 478 * can hold the given number of entries. 479 */ 480static inline unsigned int sgl_len(unsigned int n) 481{ 482 n--; 483 return (3 * n) / 2 + (n & 1) + 2; 484} 485 486/* 487 * calc_tx_flits_ofld - calculate # of flits for an offload packet 488 * @skb: the packet 489 * 490 * Returns the number of flits needed for the given offload packet. 491 * These packets are already fully constructed and no additional headers 492 * will be added. 493 */ 494static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 495{ 496 unsigned int flits, cnt; 497 498 if (is_ofld_imm(skb)) 499 return DIV_ROUND_UP(skb->len, 8); 500 flits = skb_transport_offset(skb) / 8; 501 cnt = skb_shinfo(skb)->nr_frags; 502 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 503 cnt++; 504 return flits + sgl_len(cnt); 505} 506 507#define FLOWC_WR_NPARAMS_MIN 9 508static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) 509{ 510 int nparams, flowclen16, flowclen; 511 512 nparams = FLOWC_WR_NPARAMS_MIN; 513 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 514 flowclen16 = DIV_ROUND_UP(flowclen, 16); 515 flowclen = flowclen16 * 16; 516 /* 517 * Return the number of 16-byte credits used by the FlowC request. 518 * Pass back the nparams and actual FlowC length if requested. 519 */ 520 if (nparamsp) 521 *nparamsp = nparams; 522 if (flowclenp) 523 *flowclenp = flowclen; 524 525 return flowclen16; 526} 527 528static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) 529{ 530 struct sk_buff *skb; 531 struct fw_flowc_wr *flowc; 532 int nparams, flowclen16, flowclen; 533 534 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); 535 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 536 flowc = (struct fw_flowc_wr *)skb->head; 537 flowc->op_to_nparams = 538 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams)); 539 flowc->flowid_len16 = 540 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid)); 541 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 542 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 543 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 544 flowc->mnemval[1].val = htonl(csk->tx_chan); 545 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 546 flowc->mnemval[2].val = htonl(csk->tx_chan); 547 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 548 flowc->mnemval[3].val = htonl(csk->rss_qid); 549 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 550 flowc->mnemval[4].val = htonl(csk->snd_nxt); 551 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 552 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 553 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 554 flowc->mnemval[6].val = htonl(csk->snd_win); 555 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 556 flowc->mnemval[7].val = htonl(csk->advmss); 557 flowc->mnemval[8].mnemonic = 0; 558 flowc->mnemval[8].val = 0; 559 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 560 flowc->mnemval[8].val = 16384; 561 562 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 563 564 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 565 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 566 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 567 csk->snd_nxt, csk->rcv_nxt, csk->snd_win, 568 csk->advmss); 569 570 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 571 572 return flowclen16; 573} 574 575static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 576 int dlen, int len, u32 credits, int compl) 577{ 578 struct fw_ofld_tx_data_wr *req; 579 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 580 unsigned int wr_ulp_mode = 0, val; 581 bool imm = is_ofld_imm(skb); 582 583 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 584 585 if (imm) { 586 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 587 FW_WR_COMPL_F | 588 FW_WR_IMMDLEN_V(dlen)); 589 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | 590 FW_WR_LEN16_V(credits)); 591 } else { 592 req->op_to_immdlen = 593 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 594 FW_WR_COMPL_F | 595 FW_WR_IMMDLEN_V(0)); 596 req->flowid_len16 = 597 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) | 598 FW_WR_LEN16_V(credits)); 599 } 600 if (submode) 601 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) | 602 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode); 603 val = skb_peek(&csk->write_queue) ? 0 : 1; 604 req->tunnel_to_proxy = htonl(wr_ulp_mode | 605 FW_OFLD_TX_DATA_WR_SHOVE_V(val)); 606 req->plen = htonl(len); 607 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 608 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 609} 610 611static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 612{ 613 kfree_skb(skb); 614} 615 616static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 617{ 618 int total_size = 0; 619 struct sk_buff *skb; 620 621 if (unlikely(csk->state < CTP_ESTABLISHED || 622 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 623 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 624 1 << CXGBI_DBG_PDU_TX, 625 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 626 csk, csk->state, csk->flags, csk->tid); 627 return 0; 628 } 629 630 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 631 int dlen = skb->len; 632 int len = skb->len; 633 unsigned int credits_needed; 634 int flowclen16 = 0; 635 636 skb_reset_transport_header(skb); 637 if (is_ofld_imm(skb)) 638 credits_needed = DIV_ROUND_UP(dlen, 16); 639 else 640 credits_needed = DIV_ROUND_UP( 641 8 * calc_tx_flits_ofld(skb), 642 16); 643 644 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) 645 credits_needed += DIV_ROUND_UP( 646 sizeof(struct fw_ofld_tx_data_wr), 647 16); 648 649 /* 650 * Assumes the initial credits is large enough to support 651 * fw_flowc_wr plus largest possible first payload 652 */ 653 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 654 flowclen16 = send_tx_flowc_wr(csk); 655 csk->wr_cred -= flowclen16; 656 csk->wr_una_cred += flowclen16; 657 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 658 } 659 660 if (csk->wr_cred < credits_needed) { 661 log_debug(1 << CXGBI_DBG_PDU_TX, 662 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 663 csk, skb->len, skb->data_len, 664 credits_needed, csk->wr_cred); 665 break; 666 } 667 __skb_unlink(skb, &csk->write_queue); 668 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 669 skb->csum = credits_needed + flowclen16; 670 csk->wr_cred -= credits_needed; 671 csk->wr_una_cred += credits_needed; 672 cxgbi_sock_enqueue_wr(csk, skb); 673 674 log_debug(1 << CXGBI_DBG_PDU_TX, 675 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 676 csk, skb->len, skb->data_len, credits_needed, 677 csk->wr_cred, csk->wr_una_cred); 678 679 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 680 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 681 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 682 req_completion); 683 csk->snd_nxt += len; 684 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 685 } 686 total_size += skb->truesize; 687 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 688 689 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 690 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 691 csk, csk->state, csk->flags, csk->tid, skb, len); 692 693 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 694 } 695 return total_size; 696} 697 698static inline void free_atid(struct cxgbi_sock *csk) 699{ 700 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 701 702 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 703 cxgb4_free_atid(lldi->tids, csk->atid); 704 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 705 cxgbi_sock_put(csk); 706 } 707} 708 709static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 710{ 711 struct cxgbi_sock *csk; 712 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 713 unsigned short tcp_opt = ntohs(req->tcp_opt); 714 unsigned int tid = GET_TID(req); 715 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 716 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 717 struct tid_info *t = lldi->tids; 718 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 719 720 csk = lookup_atid(t, atid); 721 if (unlikely(!csk)) { 722 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 723 goto rel_skb; 724 } 725 726 if (csk->atid != atid) { 727 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 728 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 729 goto rel_skb; 730 } 731 732 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 733 (&csk->saddr), (&csk->daddr), 734 atid, tid, csk, csk->state, csk->flags, rcv_isn); 735 736 module_put(THIS_MODULE); 737 738 cxgbi_sock_get(csk); 739 csk->tid = tid; 740 cxgb4_insert_tid(lldi->tids, csk, tid); 741 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 742 743 free_atid(csk); 744 745 spin_lock_bh(&csk->lock); 746 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 747 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 748 csk, csk->state, csk->flags, csk->tid); 749 750 if (csk->retry_timer.function) { 751 del_timer(&csk->retry_timer); 752 csk->retry_timer.function = NULL; 753 } 754 755 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 756 /* 757 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 758 * pass through opt0. 759 */ 760 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10)) 761 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10); 762 763 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40; 764 if (TCPOPT_TSTAMP_G(tcp_opt)) 765 csk->advmss -= 12; 766 if (csk->advmss < 128) 767 csk->advmss = 128; 768 769 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 770 "csk 0x%p, mss_idx %u, advmss %u.\n", 771 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss); 772 773 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 774 775 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 776 send_abort_req(csk); 777 else { 778 if (skb_queue_len(&csk->write_queue)) 779 push_tx_frames(csk, 0); 780 cxgbi_conn_tx_open(csk); 781 } 782 spin_unlock_bh(&csk->lock); 783 784rel_skb: 785 __kfree_skb(skb); 786} 787 788static int act_open_rpl_status_to_errno(int status) 789{ 790 switch (status) { 791 case CPL_ERR_CONN_RESET: 792 return -ECONNREFUSED; 793 case CPL_ERR_ARP_MISS: 794 return -EHOSTUNREACH; 795 case CPL_ERR_CONN_TIMEDOUT: 796 return -ETIMEDOUT; 797 case CPL_ERR_TCAM_FULL: 798 return -ENOMEM; 799 case CPL_ERR_CONN_EXIST: 800 return -EADDRINUSE; 801 default: 802 return -EIO; 803 } 804} 805 806static void csk_act_open_retry_timer(unsigned long data) 807{ 808 struct sk_buff *skb = NULL; 809 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 810 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 811 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *, 812 struct l2t_entry *); 813 int t4 = is_t4(lldi->adapter_type), size, size6; 814 815 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 816 "csk 0x%p,%u,0x%lx,%u.\n", 817 csk, csk->state, csk->flags, csk->tid); 818 819 cxgbi_sock_get(csk); 820 spin_lock_bh(&csk->lock); 821 822 if (t4) { 823 size = sizeof(struct cpl_act_open_req); 824 size6 = sizeof(struct cpl_act_open_req6); 825 } else { 826 size = sizeof(struct cpl_t5_act_open_req); 827 size6 = sizeof(struct cpl_t5_act_open_req6); 828 } 829 830 if (csk->csk_family == AF_INET) { 831 send_act_open_func = send_act_open_req; 832 skb = alloc_wr(size, 0, GFP_ATOMIC); 833#if IS_ENABLED(CONFIG_IPV6) 834 } else { 835 send_act_open_func = send_act_open_req6; 836 skb = alloc_wr(size6, 0, GFP_ATOMIC); 837#endif 838 } 839 840 if (!skb) 841 cxgbi_sock_fail_act_open(csk, -ENOMEM); 842 else { 843 skb->sk = (struct sock *)csk; 844 t4_set_arp_err_handler(skb, csk, 845 cxgbi_sock_act_open_req_arp_failure); 846 send_act_open_func(csk, skb, csk->l2t); 847 } 848 849 spin_unlock_bh(&csk->lock); 850 cxgbi_sock_put(csk); 851 852} 853 854static inline bool is_neg_adv(unsigned int status) 855{ 856 return status == CPL_ERR_RTX_NEG_ADVICE || 857 status == CPL_ERR_KEEPALV_NEG_ADVICE || 858 status == CPL_ERR_PERSIST_NEG_ADVICE; 859} 860 861static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 862{ 863 struct cxgbi_sock *csk; 864 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 865 unsigned int tid = GET_TID(rpl); 866 unsigned int atid = 867 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status))); 868 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status)); 869 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 870 struct tid_info *t = lldi->tids; 871 872 csk = lookup_atid(t, atid); 873 if (unlikely(!csk)) { 874 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 875 goto rel_skb; 876 } 877 878 pr_info_ipaddr("tid %u/%u, status %u.\n" 879 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr), 880 atid, tid, status, csk, csk->state, csk->flags); 881 882 if (is_neg_adv(status)) 883 goto rel_skb; 884 885 module_put(THIS_MODULE); 886 887 if (status && status != CPL_ERR_TCAM_FULL && 888 status != CPL_ERR_CONN_EXIST && 889 status != CPL_ERR_ARP_MISS) 890 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 891 892 cxgbi_sock_get(csk); 893 spin_lock_bh(&csk->lock); 894 895 if (status == CPL_ERR_CONN_EXIST && 896 csk->retry_timer.function != csk_act_open_retry_timer) { 897 csk->retry_timer.function = csk_act_open_retry_timer; 898 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 899 } else 900 cxgbi_sock_fail_act_open(csk, 901 act_open_rpl_status_to_errno(status)); 902 903 spin_unlock_bh(&csk->lock); 904 cxgbi_sock_put(csk); 905rel_skb: 906 __kfree_skb(skb); 907} 908 909static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 910{ 911 struct cxgbi_sock *csk; 912 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 913 unsigned int tid = GET_TID(req); 914 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 915 struct tid_info *t = lldi->tids; 916 917 csk = lookup_tid(t, tid); 918 if (unlikely(!csk)) { 919 pr_err("can't find connection for tid %u.\n", tid); 920 goto rel_skb; 921 } 922 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 923 (&csk->saddr), (&csk->daddr), 924 csk, csk->state, csk->flags, csk->tid); 925 cxgbi_sock_rcv_peer_close(csk); 926rel_skb: 927 __kfree_skb(skb); 928} 929 930static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 931{ 932 struct cxgbi_sock *csk; 933 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 934 unsigned int tid = GET_TID(rpl); 935 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 936 struct tid_info *t = lldi->tids; 937 938 csk = lookup_tid(t, tid); 939 if (unlikely(!csk)) { 940 pr_err("can't find connection for tid %u.\n", tid); 941 goto rel_skb; 942 } 943 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n", 944 (&csk->saddr), (&csk->daddr), 945 csk, csk->state, csk->flags, csk->tid); 946 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 947rel_skb: 948 __kfree_skb(skb); 949} 950 951static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 952 int *need_rst) 953{ 954 switch (abort_reason) { 955 case CPL_ERR_BAD_SYN: /* fall through */ 956 case CPL_ERR_CONN_RESET: 957 return csk->state > CTP_ESTABLISHED ? 958 -EPIPE : -ECONNRESET; 959 case CPL_ERR_XMIT_TIMEDOUT: 960 case CPL_ERR_PERSIST_TIMEDOUT: 961 case CPL_ERR_FINWAIT2_TIMEDOUT: 962 case CPL_ERR_KEEPALIVE_TIMEDOUT: 963 return -ETIMEDOUT; 964 default: 965 return -EIO; 966 } 967} 968 969static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 970{ 971 struct cxgbi_sock *csk; 972 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 973 unsigned int tid = GET_TID(req); 974 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 975 struct tid_info *t = lldi->tids; 976 int rst_status = CPL_ABORT_NO_RST; 977 978 csk = lookup_tid(t, tid); 979 if (unlikely(!csk)) { 980 pr_err("can't find connection for tid %u.\n", tid); 981 goto rel_skb; 982 } 983 984 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 985 (&csk->saddr), (&csk->daddr), 986 csk, csk->state, csk->flags, csk->tid, req->status); 987 988 if (is_neg_adv(req->status)) 989 goto rel_skb; 990 991 cxgbi_sock_get(csk); 992 spin_lock_bh(&csk->lock); 993 994 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 995 996 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 997 send_tx_flowc_wr(csk); 998 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 999 } 1000 1001 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 1002 cxgbi_sock_set_state(csk, CTP_ABORTING); 1003 1004 send_abort_rpl(csk, rst_status); 1005 1006 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 1007 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 1008 cxgbi_sock_closed(csk); 1009 } 1010 1011 spin_unlock_bh(&csk->lock); 1012 cxgbi_sock_put(csk); 1013rel_skb: 1014 __kfree_skb(skb); 1015} 1016 1017static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 1018{ 1019 struct cxgbi_sock *csk; 1020 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 1021 unsigned int tid = GET_TID(rpl); 1022 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1023 struct tid_info *t = lldi->tids; 1024 1025 csk = lookup_tid(t, tid); 1026 if (!csk) 1027 goto rel_skb; 1028 1029 if (csk) 1030 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n", 1031 (&csk->saddr), (&csk->daddr), csk, 1032 csk->state, csk->flags, csk->tid, rpl->status); 1033 1034 if (rpl->status == CPL_ERR_ABORT_FAILED) 1035 goto rel_skb; 1036 1037 cxgbi_sock_rcv_abort_rpl(csk); 1038rel_skb: 1039 __kfree_skb(skb); 1040} 1041 1042static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb) 1043{ 1044 struct cxgbi_sock *csk; 1045 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data; 1046 unsigned int tid = GET_TID(cpl); 1047 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1048 struct tid_info *t = lldi->tids; 1049 1050 csk = lookup_tid(t, tid); 1051 if (!csk) { 1052 pr_err("can't find connection for tid %u.\n", tid); 1053 } else { 1054 /* not expecting this, reset the connection. */ 1055 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid); 1056 spin_lock_bh(&csk->lock); 1057 send_abort_req(csk); 1058 spin_unlock_bh(&csk->lock); 1059 } 1060 __kfree_skb(skb); 1061} 1062 1063static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 1064{ 1065 struct cxgbi_sock *csk; 1066 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 1067 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 1068 unsigned int tid = GET_TID(cpl); 1069 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1070 struct tid_info *t = lldi->tids; 1071 1072 csk = lookup_tid(t, tid); 1073 if (unlikely(!csk)) { 1074 pr_err("can't find conn. for tid %u.\n", tid); 1075 goto rel_skb; 1076 } 1077 1078 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1079 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 1080 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 1081 pdu_len_ddp); 1082 1083 spin_lock_bh(&csk->lock); 1084 1085 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1086 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1087 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1088 csk, csk->state, csk->flags, csk->tid); 1089 if (csk->state != CTP_ABORTING) 1090 goto abort_conn; 1091 else 1092 goto discard; 1093 } 1094 1095 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 1096 cxgbi_skcb_flags(skb) = 0; 1097 1098 skb_reset_transport_header(skb); 1099 __skb_pull(skb, sizeof(*cpl)); 1100 __pskb_trim(skb, ntohs(cpl->len)); 1101 1102 if (!csk->skb_ulp_lhdr) { 1103 unsigned char *bhs; 1104 unsigned int hlen, dlen, plen; 1105 1106 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1107 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 1108 csk, csk->state, csk->flags, csk->tid, skb); 1109 csk->skb_ulp_lhdr = skb; 1110 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 1111 1112 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 1113 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 1114 csk->tid, cxgbi_skcb_tcp_seq(skb), 1115 csk->rcv_nxt); 1116 goto abort_conn; 1117 } 1118 1119 bhs = skb->data; 1120 hlen = ntohs(cpl->len); 1121 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 1122 1123 plen = ISCSI_PDU_LEN_G(pdu_len_ddp); 1124 if (is_t4(lldi->adapter_type)) 1125 plen -= 40; 1126 1127 if ((hlen + dlen) != plen) { 1128 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 1129 "mismatch %u != %u + %u, seq 0x%x.\n", 1130 csk->tid, plen, hlen, dlen, 1131 cxgbi_skcb_tcp_seq(skb)); 1132 goto abort_conn; 1133 } 1134 1135 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 1136 if (dlen) 1137 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 1138 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 1139 1140 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1141 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 1142 csk, skb, *bhs, hlen, dlen, 1143 ntohl(*((unsigned int *)(bhs + 16))), 1144 ntohl(*((unsigned int *)(bhs + 24)))); 1145 1146 } else { 1147 struct sk_buff *lskb = csk->skb_ulp_lhdr; 1148 1149 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 1150 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1151 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1152 csk, csk->state, csk->flags, skb, lskb); 1153 } 1154 1155 __skb_queue_tail(&csk->receive_queue, skb); 1156 spin_unlock_bh(&csk->lock); 1157 return; 1158 1159abort_conn: 1160 send_abort_req(csk); 1161discard: 1162 spin_unlock_bh(&csk->lock); 1163rel_skb: 1164 __kfree_skb(skb); 1165} 1166 1167static void do_rx_data_ddp(struct cxgbi_device *cdev, 1168 struct sk_buff *skb) 1169{ 1170 struct cxgbi_sock *csk; 1171 struct sk_buff *lskb; 1172 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1173 unsigned int tid = GET_TID(rpl); 1174 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1175 struct tid_info *t = lldi->tids; 1176 unsigned int status = ntohl(rpl->ddpvld); 1177 1178 csk = lookup_tid(t, tid); 1179 if (unlikely(!csk)) { 1180 pr_err("can't find connection for tid %u.\n", tid); 1181 goto rel_skb; 1182 } 1183 1184 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1185 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1186 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1187 1188 spin_lock_bh(&csk->lock); 1189 1190 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1191 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1192 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1193 csk, csk->state, csk->flags, csk->tid); 1194 if (csk->state != CTP_ABORTING) 1195 goto abort_conn; 1196 else 1197 goto discard; 1198 } 1199 1200 if (!csk->skb_ulp_lhdr) { 1201 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1202 goto abort_conn; 1203 } 1204 1205 lskb = csk->skb_ulp_lhdr; 1206 csk->skb_ulp_lhdr = NULL; 1207 1208 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1209 1210 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1211 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1212 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1213 1214 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1215 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1216 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1217 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1218 } 1219 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1220 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1221 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1222 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1223 } 1224 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1225 log_debug(1 << CXGBI_DBG_PDU_RX, 1226 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1227 csk, lskb, status); 1228 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1229 } 1230 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1231 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1232 log_debug(1 << CXGBI_DBG_PDU_RX, 1233 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1234 csk, lskb, status); 1235 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1236 } 1237 log_debug(1 << CXGBI_DBG_PDU_RX, 1238 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1239 csk, lskb, cxgbi_skcb_flags(lskb)); 1240 1241 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1242 cxgbi_conn_pdu_ready(csk); 1243 spin_unlock_bh(&csk->lock); 1244 goto rel_skb; 1245 1246abort_conn: 1247 send_abort_req(csk); 1248discard: 1249 spin_unlock_bh(&csk->lock); 1250rel_skb: 1251 __kfree_skb(skb); 1252} 1253 1254static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1255{ 1256 struct cxgbi_sock *csk; 1257 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1258 unsigned int tid = GET_TID(rpl); 1259 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1260 struct tid_info *t = lldi->tids; 1261 1262 csk = lookup_tid(t, tid); 1263 if (unlikely(!csk)) 1264 pr_err("can't find connection for tid %u.\n", tid); 1265 else { 1266 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1267 "csk 0x%p,%u,0x%lx,%u.\n", 1268 csk, csk->state, csk->flags, csk->tid); 1269 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1270 rpl->seq_vld); 1271 } 1272 __kfree_skb(skb); 1273} 1274 1275static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1276{ 1277 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1278 unsigned int tid = GET_TID(rpl); 1279 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1280 struct tid_info *t = lldi->tids; 1281 struct cxgbi_sock *csk; 1282 1283 csk = lookup_tid(t, tid); 1284 if (!csk) 1285 pr_err("can't find conn. for tid %u.\n", tid); 1286 1287 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1288 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1289 csk, csk->state, csk->flags, csk->tid, rpl->status); 1290 1291 if (rpl->status != CPL_ERR_NONE) 1292 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1293 csk, tid, rpl->status); 1294 1295 __kfree_skb(skb); 1296} 1297 1298static int alloc_cpls(struct cxgbi_sock *csk) 1299{ 1300 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1301 0, GFP_KERNEL); 1302 if (!csk->cpl_close) 1303 return -ENOMEM; 1304 1305 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1306 0, GFP_KERNEL); 1307 if (!csk->cpl_abort_req) 1308 goto free_cpls; 1309 1310 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1311 0, GFP_KERNEL); 1312 if (!csk->cpl_abort_rpl) 1313 goto free_cpls; 1314 return 0; 1315 1316free_cpls: 1317 cxgbi_sock_free_cpl_skbs(csk); 1318 return -ENOMEM; 1319} 1320 1321static inline void l2t_put(struct cxgbi_sock *csk) 1322{ 1323 if (csk->l2t) { 1324 cxgb4_l2t_release(csk->l2t); 1325 csk->l2t = NULL; 1326 cxgbi_sock_put(csk); 1327 } 1328} 1329 1330static void release_offload_resources(struct cxgbi_sock *csk) 1331{ 1332 struct cxgb4_lld_info *lldi; 1333#if IS_ENABLED(CONFIG_IPV6) 1334 struct net_device *ndev = csk->cdev->ports[csk->port_id]; 1335#endif 1336 1337 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1338 "csk 0x%p,%u,0x%lx,%u.\n", 1339 csk, csk->state, csk->flags, csk->tid); 1340 1341 cxgbi_sock_free_cpl_skbs(csk); 1342 if (csk->wr_cred != csk->wr_max_cred) { 1343 cxgbi_sock_purge_wr_queue(csk); 1344 cxgbi_sock_reset_wr_list(csk); 1345 } 1346 1347 l2t_put(csk); 1348#if IS_ENABLED(CONFIG_IPV6) 1349 if (csk->csk_family == AF_INET6) 1350 cxgb4_clip_release(ndev, 1351 (const u32 *)&csk->saddr6.sin6_addr, 1); 1352#endif 1353 1354 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1355 free_atid(csk); 1356 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1357 lldi = cxgbi_cdev_priv(csk->cdev); 1358 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1359 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1360 cxgbi_sock_put(csk); 1361 } 1362 csk->dst = NULL; 1363 csk->cdev = NULL; 1364} 1365 1366static int init_act_open(struct cxgbi_sock *csk) 1367{ 1368 struct cxgbi_device *cdev = csk->cdev; 1369 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1370 struct net_device *ndev = cdev->ports[csk->port_id]; 1371 struct sk_buff *skb = NULL; 1372 struct neighbour *n = NULL; 1373 void *daddr; 1374 unsigned int step; 1375 unsigned int size, size6; 1376 int t4 = is_t4(lldi->adapter_type); 1377 unsigned int linkspeed; 1378 unsigned int rcv_winf, snd_winf; 1379 1380 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1381 "csk 0x%p,%u,0x%lx,%u.\n", 1382 csk, csk->state, csk->flags, csk->tid); 1383 1384 if (csk->csk_family == AF_INET) 1385 daddr = &csk->daddr.sin_addr.s_addr; 1386#if IS_ENABLED(CONFIG_IPV6) 1387 else if (csk->csk_family == AF_INET6) 1388 daddr = &csk->daddr6.sin6_addr; 1389#endif 1390 else { 1391 pr_err("address family 0x%x not supported\n", csk->csk_family); 1392 goto rel_resource; 1393 } 1394 1395 n = dst_neigh_lookup(csk->dst, daddr); 1396 1397 if (!n) { 1398 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1399 goto rel_resource; 1400 } 1401 1402 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1403 if (csk->atid < 0) { 1404 pr_err("%s, NO atid available.\n", ndev->name); 1405 return -EINVAL; 1406 } 1407 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1408 cxgbi_sock_get(csk); 1409 1410 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1411 if (!csk->l2t) { 1412 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1413 goto rel_resource_without_clip; 1414 } 1415 cxgbi_sock_get(csk); 1416 1417#if IS_ENABLED(CONFIG_IPV6) 1418 if (csk->csk_family == AF_INET6) 1419 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1); 1420#endif 1421 1422 if (t4) { 1423 size = sizeof(struct cpl_act_open_req); 1424 size6 = sizeof(struct cpl_act_open_req6); 1425 } else { 1426 size = sizeof(struct cpl_t5_act_open_req); 1427 size6 = sizeof(struct cpl_t5_act_open_req6); 1428 } 1429 1430 if (csk->csk_family == AF_INET) 1431 skb = alloc_wr(size, 0, GFP_NOIO); 1432#if IS_ENABLED(CONFIG_IPV6) 1433 else 1434 skb = alloc_wr(size6, 0, GFP_NOIO); 1435#endif 1436 1437 if (!skb) 1438 goto rel_resource; 1439 skb->sk = (struct sock *)csk; 1440 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1441 1442 if (!csk->mtu) 1443 csk->mtu = dst_mtu(csk->dst); 1444 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1445 csk->tx_chan = cxgb4_port_chan(ndev); 1446 /* SMT two entries per row */ 1447 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1448 step = lldi->ntxq / lldi->nchan; 1449 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1450 step = lldi->nrxq / lldi->nchan; 1451 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1452 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed; 1453 csk->snd_win = cxgb4i_snd_win; 1454 csk->rcv_win = cxgb4i_rcv_win; 1455 if (cxgb4i_rcv_win <= 0) { 1456 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN; 1457 rcv_winf = linkspeed / SPEED_10000; 1458 if (rcv_winf) 1459 csk->rcv_win *= rcv_winf; 1460 } 1461 if (cxgb4i_snd_win <= 0) { 1462 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN; 1463 snd_winf = linkspeed / SPEED_10000; 1464 if (snd_winf) 1465 csk->snd_win *= snd_winf; 1466 } 1467 csk->wr_cred = lldi->wr_cred - 1468 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1469 csk->wr_max_cred = csk->wr_cred; 1470 csk->wr_una_cred = 0; 1471 cxgbi_sock_reset_wr_list(csk); 1472 csk->err = 0; 1473 1474 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n", 1475 (&csk->saddr), (&csk->daddr), csk, csk->state, 1476 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid, 1477 csk->mtu, csk->mss_idx, csk->smac_idx); 1478 1479 /* must wait for either a act_open_rpl or act_open_establish */ 1480 try_module_get(THIS_MODULE); 1481 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1482 if (csk->csk_family == AF_INET) 1483 send_act_open_req(csk, skb, csk->l2t); 1484#if IS_ENABLED(CONFIG_IPV6) 1485 else 1486 send_act_open_req6(csk, skb, csk->l2t); 1487#endif 1488 neigh_release(n); 1489 1490 return 0; 1491 1492rel_resource: 1493#if IS_ENABLED(CONFIG_IPV6) 1494 if (csk->csk_family == AF_INET6) 1495 cxgb4_clip_release(ndev, 1496 (const u32 *)&csk->saddr6.sin6_addr, 1); 1497#endif 1498rel_resource_without_clip: 1499 if (n) 1500 neigh_release(n); 1501 if (skb) 1502 __kfree_skb(skb); 1503 return -EINVAL; 1504} 1505 1506cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1507 [CPL_ACT_ESTABLISH] = do_act_establish, 1508 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1509 [CPL_PEER_CLOSE] = do_peer_close, 1510 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1511 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1512 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1513 [CPL_FW4_ACK] = do_fw4_ack, 1514 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1515 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1516 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1517 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1518 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1519 [CPL_RX_DATA] = do_rx_data, 1520}; 1521 1522int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1523{ 1524 int rc; 1525 1526 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1527 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1528 1529 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1530 cxgb4i_max_connect); 1531 if (rc < 0) 1532 return rc; 1533 1534 cdev->csk_release_offload_resources = release_offload_resources; 1535 cdev->csk_push_tx_frames = push_tx_frames; 1536 cdev->csk_send_abort_req = send_abort_req; 1537 cdev->csk_send_close_req = send_close_req; 1538 cdev->csk_send_rx_credits = send_rx_credits; 1539 cdev->csk_alloc_cpls = alloc_cpls; 1540 cdev->csk_init_act_open = init_act_open; 1541 1542 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1543 return 0; 1544} 1545 1546/* 1547 * functions to program the pagepod in h/w 1548 */ 1549#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 1550static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi, 1551 struct ulp_mem_io *req, 1552 unsigned int wr_len, unsigned int dlen, 1553 unsigned int pm_addr) 1554{ 1555 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1556 1557 INIT_ULPTX_WR(req, wr_len, 0, 0); 1558 if (is_t4(lldi->adapter_type)) 1559 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1560 (ULP_MEMIO_ORDER_F)); 1561 else 1562 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | 1563 (T5_ULP_MEMIO_IMM_F)); 1564 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); 1565 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); 1566 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1567 1568 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); 1569 idata->len = htonl(dlen); 1570} 1571 1572static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, 1573 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1574 unsigned int npods, 1575 struct cxgbi_gather_list *gl, 1576 unsigned int gl_pidx) 1577{ 1578 struct cxgbi_ddp_info *ddp = cdev->ddp; 1579 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1580 struct sk_buff *skb; 1581 struct ulp_mem_io *req; 1582 struct ulptx_idata *idata; 1583 struct cxgbi_pagepod *ppod; 1584 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; 1585 unsigned int dlen = PPOD_SIZE * npods; 1586 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1587 sizeof(struct ulptx_idata) + dlen, 16); 1588 unsigned int i; 1589 1590 skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1591 if (!skb) { 1592 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1593 cdev, idx, npods); 1594 return -ENOMEM; 1595 } 1596 req = (struct ulp_mem_io *)skb->head; 1597 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 1598 1599 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr); 1600 idata = (struct ulptx_idata *)(req + 1); 1601 ppod = (struct cxgbi_pagepod *)(idata + 1); 1602 1603 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1604 if (!hdr && !gl) 1605 cxgbi_ddp_ppod_clear(ppod); 1606 else 1607 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1608 } 1609 1610 cxgb4_ofld_send(cdev->ports[port_id], skb); 1611 return 0; 1612} 1613 1614static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1615 unsigned int idx, unsigned int npods, 1616 struct cxgbi_gather_list *gl) 1617{ 1618 unsigned int i, cnt; 1619 int err = 0; 1620 1621 for (i = 0; i < npods; i += cnt, idx += cnt) { 1622 cnt = npods - i; 1623 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1624 cnt = ULPMEM_IDATA_MAX_NPPODS; 1625 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, 1626 idx, cnt, gl, 4 * i); 1627 if (err < 0) 1628 break; 1629 } 1630 return err; 1631} 1632 1633static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1634 unsigned int idx, unsigned int npods) 1635{ 1636 unsigned int i, cnt; 1637 int err; 1638 1639 for (i = 0; i < npods; i += cnt, idx += cnt) { 1640 cnt = npods - i; 1641 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1642 cnt = ULPMEM_IDATA_MAX_NPPODS; 1643 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, 1644 idx, cnt, NULL, 0); 1645 if (err < 0) 1646 break; 1647 } 1648} 1649 1650static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1651 int pg_idx, bool reply) 1652{ 1653 struct sk_buff *skb; 1654 struct cpl_set_tcb_field *req; 1655 1656 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1657 return 0; 1658 1659 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1660 if (!skb) 1661 return -ENOMEM; 1662 1663 /* set up ulp page size */ 1664 req = (struct cpl_set_tcb_field *)skb->head; 1665 INIT_TP_WR(req, csk->tid); 1666 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1667 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1668 req->word_cookie = htons(0); 1669 req->mask = cpu_to_be64(0x3 << 8); 1670 req->val = cpu_to_be64(pg_idx << 8); 1671 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1672 1673 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1674 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1675 1676 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1677 return 0; 1678} 1679 1680static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1681 int hcrc, int dcrc, int reply) 1682{ 1683 struct sk_buff *skb; 1684 struct cpl_set_tcb_field *req; 1685 1686 if (!hcrc && !dcrc) 1687 return 0; 1688 1689 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1690 if (!skb) 1691 return -ENOMEM; 1692 1693 csk->hcrc_len = (hcrc ? 4 : 0); 1694 csk->dcrc_len = (dcrc ? 4 : 0); 1695 /* set up ulp submode */ 1696 req = (struct cpl_set_tcb_field *)skb->head; 1697 INIT_TP_WR(req, tid); 1698 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1699 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid)); 1700 req->word_cookie = htons(0); 1701 req->mask = cpu_to_be64(0x3 << 4); 1702 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1703 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1704 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1705 1706 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1707 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1708 1709 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1710 return 0; 1711} 1712 1713static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1714{ 1715 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1716 struct cxgbi_ddp_info *ddp = cdev->ddp; 1717 unsigned int tagmask, pgsz_factor[4]; 1718 int err; 1719 1720 if (ddp) { 1721 kref_get(&ddp->refcnt); 1722 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1723 cdev, cdev->ddp); 1724 return -EALREADY; 1725 } 1726 1727 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1728 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1729 lldi->iscsi_iolen, lldi->iscsi_iolen); 1730 if (err < 0) 1731 return err; 1732 1733 ddp = cdev->ddp; 1734 1735 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1736 cxgbi_ddp_page_size_factor(pgsz_factor); 1737 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1738 1739 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1740 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1741 cdev->csk_ddp_set = ddp_set_map; 1742 cdev->csk_ddp_clear = ddp_clear_map; 1743 1744 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1745 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1746 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1747 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1748 " %u/%u.\n", 1749 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1750 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1751 ddp->max_rxsz, lldi->iscsi_iolen); 1752 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1753 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1754 ddp->max_rxsz); 1755 return 0; 1756} 1757 1758static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1759{ 1760 struct cxgbi_device *cdev; 1761 struct port_info *pi; 1762 int i, rc; 1763 1764 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1765 if (!cdev) { 1766 pr_info("t4 device 0x%p, register failed.\n", lldi); 1767 return NULL; 1768 } 1769 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1770 cdev, lldi->adapter_type, lldi->nports, 1771 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1772 lldi->nrxq, lldi->wr_cred); 1773 for (i = 0; i < lldi->nrxq; i++) 1774 log_debug(1 << CXGBI_DBG_DEV, 1775 "t4 0x%p, rxq id #%d: %u.\n", 1776 cdev, i, lldi->rxq_ids[i]); 1777 1778 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1779 cdev->flags = CXGBI_FLAG_DEV_T4; 1780 cdev->pdev = lldi->pdev; 1781 cdev->ports = lldi->ports; 1782 cdev->nports = lldi->nports; 1783 cdev->mtus = lldi->mtus; 1784 cdev->nmtus = NMTUS; 1785 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1786 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1787 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1788 cdev->itp = &cxgb4i_iscsi_transport; 1789 1790 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0])) 1791 << FW_VIID_PFN_S; 1792 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1793 cdev, lldi->ports[0]->name, cdev->pfvf); 1794 1795 rc = cxgb4i_ddp_init(cdev); 1796 if (rc) { 1797 pr_info("t4 0x%p ddp init failed.\n", cdev); 1798 goto err_out; 1799 } 1800 rc = cxgb4i_ofld_init(cdev); 1801 if (rc) { 1802 pr_info("t4 0x%p ofld init failed.\n", cdev); 1803 goto err_out; 1804 } 1805 1806 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1807 &cxgb4i_host_template, cxgb4i_stt); 1808 if (rc) 1809 goto err_out; 1810 1811 for (i = 0; i < cdev->nports; i++) { 1812 pi = netdev_priv(lldi->ports[i]); 1813 cdev->hbas[i]->port_id = pi->port_id; 1814 } 1815 return cdev; 1816 1817err_out: 1818 cxgbi_device_unregister(cdev); 1819 return ERR_PTR(-ENOMEM); 1820} 1821 1822#define RX_PULL_LEN 128 1823static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1824 const struct pkt_gl *pgl) 1825{ 1826 const struct cpl_act_establish *rpl; 1827 struct sk_buff *skb; 1828 unsigned int opc; 1829 struct cxgbi_device *cdev = handle; 1830 1831 if (pgl == NULL) { 1832 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1833 1834 skb = alloc_wr(len, 0, GFP_ATOMIC); 1835 if (!skb) 1836 goto nomem; 1837 skb_copy_to_linear_data(skb, &rsp[1], len); 1838 } else { 1839 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1840 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1841 pgl->va, be64_to_cpu(*rsp), 1842 be64_to_cpu(*(u64 *)pgl->va), 1843 pgl->tot_len); 1844 return 0; 1845 } 1846 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1847 if (unlikely(!skb)) 1848 goto nomem; 1849 } 1850 1851 rpl = (struct cpl_act_establish *)skb->data; 1852 opc = rpl->ot.opcode; 1853 log_debug(1 << CXGBI_DBG_TOE, 1854 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1855 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1856 if (cxgb4i_cplhandlers[opc]) 1857 cxgb4i_cplhandlers[opc](cdev, skb); 1858 else { 1859 pr_err("No handler for opcode 0x%x.\n", opc); 1860 __kfree_skb(skb); 1861 } 1862 return 0; 1863nomem: 1864 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1865 return 1; 1866} 1867 1868static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1869{ 1870 struct cxgbi_device *cdev = handle; 1871 1872 switch (state) { 1873 case CXGB4_STATE_UP: 1874 pr_info("cdev 0x%p, UP.\n", cdev); 1875 break; 1876 case CXGB4_STATE_START_RECOVERY: 1877 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1878 /* close all connections */ 1879 break; 1880 case CXGB4_STATE_DOWN: 1881 pr_info("cdev 0x%p, DOWN.\n", cdev); 1882 break; 1883 case CXGB4_STATE_DETACH: 1884 pr_info("cdev 0x%p, DETACH.\n", cdev); 1885 cxgbi_device_unregister(cdev); 1886 break; 1887 default: 1888 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1889 break; 1890 } 1891 return 0; 1892} 1893 1894static int __init cxgb4i_init_module(void) 1895{ 1896 int rc; 1897 1898 printk(KERN_INFO "%s", version); 1899 1900 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1901 if (rc < 0) 1902 return rc; 1903 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1904 1905 return 0; 1906} 1907 1908static void __exit cxgb4i_exit_module(void) 1909{ 1910 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1911 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1912 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1913} 1914 1915module_init(cxgb4i_init_module); 1916module_exit(cxgb4i_exit_module); 1917