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 23 #include "t4_regs.h" 24 #include "t4_msg.h" 25 #include "cxgb4.h" 26 #include "cxgb4_uld.h" 27 #include "t4fw_api.h" 28 #include "l2t.h" 29 #include "cxgb4i.h" 30 31 static unsigned int dbg_level; 32 33 #include "../libcxgbi.h" 34 35 #define DRV_MODULE_NAME "cxgb4i" 36 #define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver" 37 #define DRV_MODULE_VERSION "0.9.4" 38 39 static char version[] = 40 DRV_MODULE_DESC " " DRV_MODULE_NAME 41 " v" DRV_MODULE_VERSION "\n"; 42 43 MODULE_AUTHOR("Chelsio Communications, Inc."); 44 MODULE_DESCRIPTION(DRV_MODULE_DESC); 45 MODULE_VERSION(DRV_MODULE_VERSION); 46 MODULE_LICENSE("GPL"); 47 48 module_param(dbg_level, uint, 0644); 49 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 50 51 static int cxgb4i_rcv_win = 256 * 1024; 52 module_param(cxgb4i_rcv_win, int, 0644); 53 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 54 55 static int cxgb4i_snd_win = 128 * 1024; 56 module_param(cxgb4i_snd_win, int, 0644); 57 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 58 59 static int cxgb4i_rx_credit_thres = 10 * 1024; 60 module_param(cxgb4i_rx_credit_thres, int, 0644); 61 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 62 "RX credits return threshold in bytes (default=10KB)"); 63 64 static unsigned int cxgb4i_max_connect = (8 * 1024); 65 module_param(cxgb4i_max_connect, uint, 0644); 66 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 67 68 static unsigned short cxgb4i_sport_base = 20000; 69 module_param(cxgb4i_sport_base, ushort, 0644); 70 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 71 72 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 73 74 static void *t4_uld_add(const struct cxgb4_lld_info *); 75 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 76 static int t4_uld_state_change(void *, enum cxgb4_state state); 77 78 static const struct cxgb4_uld_info cxgb4i_uld_info = { 79 .name = DRV_MODULE_NAME, 80 .add = t4_uld_add, 81 .rx_handler = t4_uld_rx_handler, 82 .state_change = t4_uld_state_change, 83 }; 84 85 static struct scsi_host_template cxgb4i_host_template = { 86 .module = THIS_MODULE, 87 .name = DRV_MODULE_NAME, 88 .proc_name = DRV_MODULE_NAME, 89 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 90 .queuecommand = iscsi_queuecommand, 91 .change_queue_depth = iscsi_change_queue_depth, 92 .sg_tablesize = SG_ALL, 93 .max_sectors = 0xFFFF, 94 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 95 .eh_abort_handler = iscsi_eh_abort, 96 .eh_device_reset_handler = iscsi_eh_device_reset, 97 .eh_target_reset_handler = iscsi_eh_recover_target, 98 .target_alloc = iscsi_target_alloc, 99 .use_clustering = DISABLE_CLUSTERING, 100 .this_id = -1, 101 }; 102 103 static struct iscsi_transport cxgb4i_iscsi_transport = { 104 .owner = THIS_MODULE, 105 .name = DRV_MODULE_NAME, 106 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 107 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 108 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 109 .attr_is_visible = cxgbi_attr_is_visible, 110 .get_host_param = cxgbi_get_host_param, 111 .set_host_param = cxgbi_set_host_param, 112 /* session management */ 113 .create_session = cxgbi_create_session, 114 .destroy_session = cxgbi_destroy_session, 115 .get_session_param = iscsi_session_get_param, 116 /* connection management */ 117 .create_conn = cxgbi_create_conn, 118 .bind_conn = cxgbi_bind_conn, 119 .destroy_conn = iscsi_tcp_conn_teardown, 120 .start_conn = iscsi_conn_start, 121 .stop_conn = iscsi_conn_stop, 122 .get_conn_param = iscsi_conn_get_param, 123 .set_param = cxgbi_set_conn_param, 124 .get_stats = cxgbi_get_conn_stats, 125 /* pdu xmit req from user space */ 126 .send_pdu = iscsi_conn_send_pdu, 127 /* task */ 128 .init_task = iscsi_tcp_task_init, 129 .xmit_task = iscsi_tcp_task_xmit, 130 .cleanup_task = cxgbi_cleanup_task, 131 /* pdu */ 132 .alloc_pdu = cxgbi_conn_alloc_pdu, 133 .init_pdu = cxgbi_conn_init_pdu, 134 .xmit_pdu = cxgbi_conn_xmit_pdu, 135 .parse_pdu_itt = cxgbi_parse_pdu_itt, 136 /* TCP connect/disconnect */ 137 .get_ep_param = cxgbi_get_ep_param, 138 .ep_connect = cxgbi_ep_connect, 139 .ep_poll = cxgbi_ep_poll, 140 .ep_disconnect = cxgbi_ep_disconnect, 141 /* Error recovery timeout call */ 142 .session_recovery_timedout = iscsi_session_recovery_timedout, 143 }; 144 145 static struct scsi_transport_template *cxgb4i_stt; 146 147 /* 148 * CPL (Chelsio Protocol Language) defines a message passing interface between 149 * the host driver and Chelsio asic. 150 * The section below implments CPLs that related to iscsi tcp connection 151 * open/close/abort and data send/receive. 152 */ 153 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 154 #define RCV_BUFSIZ_MASK 0x3FFU 155 #define MAX_IMM_TX_PKT_LEN 128 156 157 static inline void set_queue(struct sk_buff *skb, unsigned int queue, 158 const struct cxgbi_sock *csk) 159 { 160 skb->queue_mapping = queue; 161 } 162 163 static int push_tx_frames(struct cxgbi_sock *, int); 164 165 /* 166 * is_ofld_imm - check whether a packet can be sent as immediate data 167 * @skb: the packet 168 * 169 * Returns true if a packet can be sent as an offload WR with immediate 170 * data. We currently use the same limit as for Ethernet packets. 171 */ 172 static inline int is_ofld_imm(const struct sk_buff *skb) 173 { 174 return skb->len <= (MAX_IMM_TX_PKT_LEN - 175 sizeof(struct fw_ofld_tx_data_wr)); 176 } 177 178 179 #define VLAN_NONE 0xfff 180 #define FILTER_SEL_VLAN_NONE 0xffff 181 #define FILTER_SEL_WIDTH_P_FC (3+1) /* port uses 3 bits, FCoE one bit */ 182 #define FILTER_SEL_WIDTH_VIN_P_FC \ 183 (6 + 7 + FILTER_SEL_WIDTH_P_FC) /* 6 bits are unused, VF uses 7 bits*/ 184 #define FILTER_SEL_WIDTH_TAG_P_FC \ 185 (3 + FILTER_SEL_WIDTH_VIN_P_FC) /* PF uses 3 bits */ 186 #define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC) 187 188 static unsigned int select_ntuple(struct cxgbi_device *cdev, 189 struct l2t_entry *l2t) 190 { 191 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 192 unsigned int ntuple = 0; 193 u32 viid; 194 195 switch (lldi->filt_mode) { 196 197 /* default filter mode */ 198 case HW_TPL_FR_MT_PR_IV_P_FC: 199 if (l2t->vlan == VLAN_NONE) 200 ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC; 201 else { 202 ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC; 203 ntuple |= 1 << FILTER_SEL_WIDTH_VLD_TAG_P_FC; 204 } 205 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP << 206 FILTER_SEL_WIDTH_VLD_TAG_P_FC; 207 break; 208 case HW_TPL_FR_MT_PR_OV_P_FC: { 209 viid = cxgb4_port_viid(l2t->neigh->dev); 210 211 ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC; 212 ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC; 213 ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC; 214 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP << 215 FILTER_SEL_WIDTH_VLD_TAG_P_FC; 216 break; 217 } 218 default: 219 break; 220 } 221 return ntuple; 222 } 223 224 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 225 struct l2t_entry *e) 226 { 227 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 228 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 229 unsigned long long opt0; 230 unsigned int opt2; 231 unsigned int qid_atid = ((unsigned int)csk->atid) | 232 (((unsigned int)csk->rss_qid) << 14); 233 234 opt0 = KEEP_ALIVE(1) | 235 WND_SCALE(wscale) | 236 MSS_IDX(csk->mss_idx) | 237 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | 238 TX_CHAN(csk->tx_chan) | 239 SMAC_SEL(csk->smac_idx) | 240 ULP_MODE(ULP_MODE_ISCSI) | 241 RCV_BUFSIZ(cxgb4i_rcv_win >> 10); 242 opt2 = RX_CHANNEL(0) | 243 RSS_QUEUE_VALID | 244 (1 << 20) | 245 RSS_QUEUE(csk->rss_qid); 246 247 if (is_t4(lldi->adapter_type)) { 248 struct cpl_act_open_req *req = 249 (struct cpl_act_open_req *)skb->head; 250 251 req = (struct cpl_act_open_req *)skb->head; 252 253 INIT_TP_WR(req, 0); 254 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 255 qid_atid)); 256 req->local_port = csk->saddr.sin_port; 257 req->peer_port = csk->daddr.sin_port; 258 req->local_ip = csk->saddr.sin_addr.s_addr; 259 req->peer_ip = csk->daddr.sin_addr.s_addr; 260 req->opt0 = cpu_to_be64(opt0); 261 req->params = cpu_to_be32(select_ntuple(csk->cdev, csk->l2t)); 262 opt2 |= 1 << 22; 263 req->opt2 = cpu_to_be32(opt2); 264 265 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 266 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 267 csk, &req->local_ip, ntohs(req->local_port), 268 &req->peer_ip, ntohs(req->peer_port), 269 csk->atid, csk->rss_qid); 270 } else { 271 struct cpl_t5_act_open_req *req = 272 (struct cpl_t5_act_open_req *)skb->head; 273 274 req = (struct cpl_t5_act_open_req *)skb->head; 275 276 INIT_TP_WR(req, 0); 277 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 278 qid_atid)); 279 req->local_port = csk->saddr.sin_port; 280 req->peer_port = csk->daddr.sin_port; 281 req->local_ip = csk->saddr.sin_addr.s_addr; 282 req->peer_ip = csk->daddr.sin_addr.s_addr; 283 req->opt0 = cpu_to_be64(opt0); 284 req->params = cpu_to_be32(select_ntuple(csk->cdev, csk->l2t)); 285 opt2 |= 1 << 31; 286 req->opt2 = cpu_to_be32(opt2); 287 288 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 289 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 290 csk, &req->local_ip, ntohs(req->local_port), 291 &req->peer_ip, ntohs(req->peer_port), 292 csk->atid, csk->rss_qid); 293 } 294 295 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 296 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 297 } 298 299 static void send_close_req(struct cxgbi_sock *csk) 300 { 301 struct sk_buff *skb = csk->cpl_close; 302 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 303 unsigned int tid = csk->tid; 304 305 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 306 "csk 0x%p,%u,0x%lx, tid %u.\n", 307 csk, csk->state, csk->flags, csk->tid); 308 csk->cpl_close = NULL; 309 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 310 INIT_TP_WR(req, tid); 311 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 312 req->rsvd = 0; 313 314 cxgbi_sock_skb_entail(csk, skb); 315 if (csk->state >= CTP_ESTABLISHED) 316 push_tx_frames(csk, 1); 317 } 318 319 static void abort_arp_failure(void *handle, struct sk_buff *skb) 320 { 321 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 322 struct cpl_abort_req *req; 323 324 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 325 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 326 csk, csk->state, csk->flags, csk->tid); 327 req = (struct cpl_abort_req *)skb->data; 328 req->cmd = CPL_ABORT_NO_RST; 329 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 330 } 331 332 static void send_abort_req(struct cxgbi_sock *csk) 333 { 334 struct cpl_abort_req *req; 335 struct sk_buff *skb = csk->cpl_abort_req; 336 337 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 338 return; 339 cxgbi_sock_set_state(csk, CTP_ABORTING); 340 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 341 cxgbi_sock_purge_write_queue(csk); 342 343 csk->cpl_abort_req = NULL; 344 req = (struct cpl_abort_req *)skb->head; 345 set_queue(skb, CPL_PRIORITY_DATA, csk); 346 req->cmd = CPL_ABORT_SEND_RST; 347 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 348 INIT_TP_WR(req, csk->tid); 349 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 350 req->rsvd0 = htonl(csk->snd_nxt); 351 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 352 353 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 354 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 355 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 356 req->rsvd1); 357 358 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 359 } 360 361 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 362 { 363 struct sk_buff *skb = csk->cpl_abort_rpl; 364 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 365 366 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 367 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 368 csk, csk->state, csk->flags, csk->tid, rst_status); 369 370 csk->cpl_abort_rpl = NULL; 371 set_queue(skb, CPL_PRIORITY_DATA, csk); 372 INIT_TP_WR(rpl, csk->tid); 373 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 374 rpl->cmd = rst_status; 375 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 376 } 377 378 /* 379 * CPL connection rx data ack: host -> 380 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 381 * credits sent. 382 */ 383 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 384 { 385 struct sk_buff *skb; 386 struct cpl_rx_data_ack *req; 387 388 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 389 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 390 csk, csk->state, csk->flags, csk->tid, credits); 391 392 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 393 if (!skb) { 394 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 395 return 0; 396 } 397 req = (struct cpl_rx_data_ack *)skb->head; 398 399 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 400 INIT_TP_WR(req, csk->tid); 401 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 402 csk->tid)); 403 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1)); 404 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 405 return credits; 406 } 407 408 /* 409 * sgl_len - calculates the size of an SGL of the given capacity 410 * @n: the number of SGL entries 411 * Calculates the number of flits needed for a scatter/gather list that 412 * can hold the given number of entries. 413 */ 414 static inline unsigned int sgl_len(unsigned int n) 415 { 416 n--; 417 return (3 * n) / 2 + (n & 1) + 2; 418 } 419 420 /* 421 * calc_tx_flits_ofld - calculate # of flits for an offload packet 422 * @skb: the packet 423 * 424 * Returns the number of flits needed for the given offload packet. 425 * These packets are already fully constructed and no additional headers 426 * will be added. 427 */ 428 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 429 { 430 unsigned int flits, cnt; 431 432 if (is_ofld_imm(skb)) 433 return DIV_ROUND_UP(skb->len, 8); 434 flits = skb_transport_offset(skb) / 8; 435 cnt = skb_shinfo(skb)->nr_frags; 436 if (skb_tail_pointer(skb) != skb_transport_header(skb)) 437 cnt++; 438 return flits + sgl_len(cnt); 439 } 440 441 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) 442 { 443 struct sk_buff *skb; 444 struct fw_flowc_wr *flowc; 445 int flowclen, i; 446 447 flowclen = 80; 448 skb = alloc_wr(flowclen, 0, GFP_ATOMIC); 449 flowc = (struct fw_flowc_wr *)skb->head; 450 flowc->op_to_nparams = 451 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); 452 flowc->flowid_len16 = 453 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | 454 FW_WR_FLOWID(csk->tid)); 455 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 456 flowc->mnemval[0].val = htonl(csk->cdev->pfvf); 457 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 458 flowc->mnemval[1].val = htonl(csk->tx_chan); 459 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 460 flowc->mnemval[2].val = htonl(csk->tx_chan); 461 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 462 flowc->mnemval[3].val = htonl(csk->rss_qid); 463 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 464 flowc->mnemval[4].val = htonl(csk->snd_nxt); 465 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 466 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 467 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 468 flowc->mnemval[6].val = htonl(cxgb4i_snd_win); 469 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 470 flowc->mnemval[7].val = htonl(csk->advmss); 471 flowc->mnemval[8].mnemonic = 0; 472 flowc->mnemval[8].val = 0; 473 for (i = 0; i < 9; i++) { 474 flowc->mnemval[i].r4[0] = 0; 475 flowc->mnemval[i].r4[1] = 0; 476 flowc->mnemval[i].r4[2] = 0; 477 } 478 set_queue(skb, CPL_PRIORITY_DATA, csk); 479 480 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 481 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 482 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 483 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, 484 csk->advmss); 485 486 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 487 } 488 489 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 490 int dlen, int len, u32 credits, int compl) 491 { 492 struct fw_ofld_tx_data_wr *req; 493 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 494 unsigned int wr_ulp_mode = 0; 495 496 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 497 498 if (is_ofld_imm(skb)) { 499 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 500 FW_WR_COMPL(1) | 501 FW_WR_IMMDLEN(dlen)); 502 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | 503 FW_WR_LEN16(credits)); 504 } else { 505 req->op_to_immdlen = 506 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 507 FW_WR_COMPL(1) | 508 FW_WR_IMMDLEN(0)); 509 req->flowid_len16 = 510 cpu_to_be32(FW_WR_FLOWID(csk->tid) | 511 FW_WR_LEN16(credits)); 512 } 513 if (submode) 514 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | 515 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); 516 req->tunnel_to_proxy = htonl(wr_ulp_mode | 517 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1)); 518 req->plen = htonl(len); 519 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 520 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 521 } 522 523 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 524 { 525 kfree_skb(skb); 526 } 527 528 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 529 { 530 int total_size = 0; 531 struct sk_buff *skb; 532 533 if (unlikely(csk->state < CTP_ESTABLISHED || 534 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 535 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 536 1 << CXGBI_DBG_PDU_TX, 537 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 538 csk, csk->state, csk->flags, csk->tid); 539 return 0; 540 } 541 542 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 543 int dlen = skb->len; 544 int len = skb->len; 545 unsigned int credits_needed; 546 547 skb_reset_transport_header(skb); 548 if (is_ofld_imm(skb)) 549 credits_needed = DIV_ROUND_UP(dlen + 550 sizeof(struct fw_ofld_tx_data_wr), 16); 551 else 552 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) 553 + sizeof(struct fw_ofld_tx_data_wr), 554 16); 555 556 if (csk->wr_cred < credits_needed) { 557 log_debug(1 << CXGBI_DBG_PDU_TX, 558 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 559 csk, skb->len, skb->data_len, 560 credits_needed, csk->wr_cred); 561 break; 562 } 563 __skb_unlink(skb, &csk->write_queue); 564 set_queue(skb, CPL_PRIORITY_DATA, csk); 565 skb->csum = credits_needed; 566 csk->wr_cred -= credits_needed; 567 csk->wr_una_cred += credits_needed; 568 cxgbi_sock_enqueue_wr(csk, skb); 569 570 log_debug(1 << CXGBI_DBG_PDU_TX, 571 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 572 csk, skb->len, skb->data_len, credits_needed, 573 csk->wr_cred, csk->wr_una_cred); 574 575 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 576 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 577 send_tx_flowc_wr(csk); 578 skb->csum += 5; 579 csk->wr_cred -= 5; 580 csk->wr_una_cred += 5; 581 } 582 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 583 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 584 req_completion); 585 csk->snd_nxt += len; 586 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 587 } 588 total_size += skb->truesize; 589 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 590 591 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 592 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 593 csk, csk->state, csk->flags, csk->tid, skb, len); 594 595 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 596 } 597 return total_size; 598 } 599 600 static inline void free_atid(struct cxgbi_sock *csk) 601 { 602 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 603 604 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 605 cxgb4_free_atid(lldi->tids, csk->atid); 606 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 607 cxgbi_sock_put(csk); 608 } 609 } 610 611 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 612 { 613 struct cxgbi_sock *csk; 614 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 615 unsigned short tcp_opt = ntohs(req->tcp_opt); 616 unsigned int tid = GET_TID(req); 617 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); 618 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 619 struct tid_info *t = lldi->tids; 620 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 621 622 csk = lookup_atid(t, atid); 623 if (unlikely(!csk)) { 624 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 625 goto rel_skb; 626 } 627 628 if (csk->atid != atid) { 629 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", 630 atid, csk, csk->state, csk->flags, csk->tid, csk->atid); 631 goto rel_skb; 632 } 633 634 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 635 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n", 636 csk, csk->state, csk->flags, tid, atid, rcv_isn); 637 638 cxgbi_sock_get(csk); 639 csk->tid = tid; 640 cxgb4_insert_tid(lldi->tids, csk, tid); 641 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 642 643 free_atid(csk); 644 645 spin_lock_bh(&csk->lock); 646 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 647 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 648 csk, csk->state, csk->flags, csk->tid); 649 650 if (csk->retry_timer.function) { 651 del_timer(&csk->retry_timer); 652 csk->retry_timer.function = NULL; 653 } 654 655 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 656 /* 657 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 658 * pass through opt0. 659 */ 660 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) 661 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); 662 663 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; 664 if (GET_TCPOPT_TSTAMP(tcp_opt)) 665 csk->advmss -= 12; 666 if (csk->advmss < 128) 667 csk->advmss = 128; 668 669 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 670 "csk 0x%p, mss_idx %u, advmss %u.\n", 671 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss); 672 673 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 674 675 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 676 send_abort_req(csk); 677 else { 678 if (skb_queue_len(&csk->write_queue)) 679 push_tx_frames(csk, 0); 680 cxgbi_conn_tx_open(csk); 681 } 682 spin_unlock_bh(&csk->lock); 683 684 rel_skb: 685 __kfree_skb(skb); 686 } 687 688 static int act_open_rpl_status_to_errno(int status) 689 { 690 switch (status) { 691 case CPL_ERR_CONN_RESET: 692 return -ECONNREFUSED; 693 case CPL_ERR_ARP_MISS: 694 return -EHOSTUNREACH; 695 case CPL_ERR_CONN_TIMEDOUT: 696 return -ETIMEDOUT; 697 case CPL_ERR_TCAM_FULL: 698 return -ENOMEM; 699 case CPL_ERR_CONN_EXIST: 700 return -EADDRINUSE; 701 default: 702 return -EIO; 703 } 704 } 705 706 static void csk_act_open_retry_timer(unsigned long data) 707 { 708 struct sk_buff *skb; 709 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 710 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 711 712 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 713 "csk 0x%p,%u,0x%lx,%u.\n", 714 csk, csk->state, csk->flags, csk->tid); 715 716 cxgbi_sock_get(csk); 717 spin_lock_bh(&csk->lock); 718 skb = alloc_wr(is_t4(lldi->adapter_type) ? 719 sizeof(struct cpl_act_open_req) : 720 sizeof(struct cpl_t5_act_open_req), 721 0, GFP_ATOMIC); 722 if (!skb) 723 cxgbi_sock_fail_act_open(csk, -ENOMEM); 724 else { 725 skb->sk = (struct sock *)csk; 726 t4_set_arp_err_handler(skb, csk, 727 cxgbi_sock_act_open_req_arp_failure); 728 send_act_open_req(csk, skb, csk->l2t); 729 } 730 spin_unlock_bh(&csk->lock); 731 cxgbi_sock_put(csk); 732 } 733 734 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 735 { 736 struct cxgbi_sock *csk; 737 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 738 unsigned int tid = GET_TID(rpl); 739 unsigned int atid = 740 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); 741 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status)); 742 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 743 struct tid_info *t = lldi->tids; 744 745 csk = lookup_atid(t, atid); 746 if (unlikely(!csk)) { 747 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 748 goto rel_skb; 749 } 750 751 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n", 752 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), 753 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port), 754 atid, tid, status, csk, csk->state, csk->flags); 755 756 if (status == CPL_ERR_RTX_NEG_ADVICE) 757 goto rel_skb; 758 759 if (status && status != CPL_ERR_TCAM_FULL && 760 status != CPL_ERR_CONN_EXIST && 761 status != CPL_ERR_ARP_MISS) 762 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 763 764 cxgbi_sock_get(csk); 765 spin_lock_bh(&csk->lock); 766 767 if (status == CPL_ERR_CONN_EXIST && 768 csk->retry_timer.function != csk_act_open_retry_timer) { 769 csk->retry_timer.function = csk_act_open_retry_timer; 770 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 771 } else 772 cxgbi_sock_fail_act_open(csk, 773 act_open_rpl_status_to_errno(status)); 774 775 spin_unlock_bh(&csk->lock); 776 cxgbi_sock_put(csk); 777 rel_skb: 778 __kfree_skb(skb); 779 } 780 781 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 782 { 783 struct cxgbi_sock *csk; 784 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 785 unsigned int tid = GET_TID(req); 786 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 787 struct tid_info *t = lldi->tids; 788 789 csk = lookup_tid(t, tid); 790 if (unlikely(!csk)) { 791 pr_err("can't find connection for tid %u.\n", tid); 792 goto rel_skb; 793 } 794 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 795 "csk 0x%p,%u,0x%lx,%u.\n", 796 csk, csk->state, csk->flags, csk->tid); 797 cxgbi_sock_rcv_peer_close(csk); 798 rel_skb: 799 __kfree_skb(skb); 800 } 801 802 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 803 { 804 struct cxgbi_sock *csk; 805 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 806 unsigned int tid = GET_TID(rpl); 807 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 808 struct tid_info *t = lldi->tids; 809 810 csk = lookup_tid(t, tid); 811 if (unlikely(!csk)) { 812 pr_err("can't find connection for tid %u.\n", tid); 813 goto rel_skb; 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 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 819 rel_skb: 820 __kfree_skb(skb); 821 } 822 823 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 824 int *need_rst) 825 { 826 switch (abort_reason) { 827 case CPL_ERR_BAD_SYN: /* fall through */ 828 case CPL_ERR_CONN_RESET: 829 return csk->state > CTP_ESTABLISHED ? 830 -EPIPE : -ECONNRESET; 831 case CPL_ERR_XMIT_TIMEDOUT: 832 case CPL_ERR_PERSIST_TIMEDOUT: 833 case CPL_ERR_FINWAIT2_TIMEDOUT: 834 case CPL_ERR_KEEPALIVE_TIMEDOUT: 835 return -ETIMEDOUT; 836 default: 837 return -EIO; 838 } 839 } 840 841 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 842 { 843 struct cxgbi_sock *csk; 844 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 845 unsigned int tid = GET_TID(req); 846 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 847 struct tid_info *t = lldi->tids; 848 int rst_status = CPL_ABORT_NO_RST; 849 850 csk = lookup_tid(t, tid); 851 if (unlikely(!csk)) { 852 pr_err("can't find connection for tid %u.\n", tid); 853 goto rel_skb; 854 } 855 856 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 857 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n", 858 csk, csk->state, csk->flags, csk->tid, req->status); 859 860 if (req->status == CPL_ERR_RTX_NEG_ADVICE || 861 req->status == CPL_ERR_PERSIST_NEG_ADVICE) 862 goto rel_skb; 863 864 cxgbi_sock_get(csk); 865 spin_lock_bh(&csk->lock); 866 867 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { 868 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 869 cxgbi_sock_set_state(csk, CTP_ABORTING); 870 goto done; 871 } 872 873 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 874 send_abort_rpl(csk, rst_status); 875 876 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 877 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 878 cxgbi_sock_closed(csk); 879 } 880 done: 881 spin_unlock_bh(&csk->lock); 882 cxgbi_sock_put(csk); 883 rel_skb: 884 __kfree_skb(skb); 885 } 886 887 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 888 { 889 struct cxgbi_sock *csk; 890 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 891 unsigned int tid = GET_TID(rpl); 892 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 893 struct tid_info *t = lldi->tids; 894 895 csk = lookup_tid(t, tid); 896 if (!csk) 897 goto rel_skb; 898 899 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 900 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", 901 rpl->status, csk, csk ? csk->state : 0, 902 csk ? csk->flags : 0UL); 903 904 if (rpl->status == CPL_ERR_ABORT_FAILED) 905 goto rel_skb; 906 907 cxgbi_sock_rcv_abort_rpl(csk); 908 rel_skb: 909 __kfree_skb(skb); 910 } 911 912 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 913 { 914 struct cxgbi_sock *csk; 915 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 916 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 917 unsigned int tid = GET_TID(cpl); 918 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 919 struct tid_info *t = lldi->tids; 920 921 csk = lookup_tid(t, tid); 922 if (unlikely(!csk)) { 923 pr_err("can't find conn. for tid %u.\n", tid); 924 goto rel_skb; 925 } 926 927 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 928 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 929 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 930 pdu_len_ddp); 931 932 spin_lock_bh(&csk->lock); 933 934 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 935 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 936 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 937 csk, csk->state, csk->flags, csk->tid); 938 if (csk->state != CTP_ABORTING) 939 goto abort_conn; 940 else 941 goto discard; 942 } 943 944 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 945 cxgbi_skcb_flags(skb) = 0; 946 947 skb_reset_transport_header(skb); 948 __skb_pull(skb, sizeof(*cpl)); 949 __pskb_trim(skb, ntohs(cpl->len)); 950 951 if (!csk->skb_ulp_lhdr) { 952 unsigned char *bhs; 953 unsigned int hlen, dlen, plen; 954 955 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 956 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 957 csk, csk->state, csk->flags, csk->tid, skb); 958 csk->skb_ulp_lhdr = skb; 959 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); 960 961 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { 962 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 963 csk->tid, cxgbi_skcb_tcp_seq(skb), 964 csk->rcv_nxt); 965 goto abort_conn; 966 } 967 968 bhs = skb->data; 969 hlen = ntohs(cpl->len); 970 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 971 972 plen = ISCSI_PDU_LEN(pdu_len_ddp); 973 if (is_t4(lldi->adapter_type)) 974 plen -= 40; 975 976 if ((hlen + dlen) != plen) { 977 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 978 "mismatch %u != %u + %u, seq 0x%x.\n", 979 csk->tid, plen, hlen, dlen, 980 cxgbi_skcb_tcp_seq(skb)); 981 goto abort_conn; 982 } 983 984 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 985 if (dlen) 986 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 987 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 988 989 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 990 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 991 csk, skb, *bhs, hlen, dlen, 992 ntohl(*((unsigned int *)(bhs + 16))), 993 ntohl(*((unsigned int *)(bhs + 24)))); 994 995 } else { 996 struct sk_buff *lskb = csk->skb_ulp_lhdr; 997 998 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 999 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1000 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 1001 csk, csk->state, csk->flags, skb, lskb); 1002 } 1003 1004 __skb_queue_tail(&csk->receive_queue, skb); 1005 spin_unlock_bh(&csk->lock); 1006 return; 1007 1008 abort_conn: 1009 send_abort_req(csk); 1010 discard: 1011 spin_unlock_bh(&csk->lock); 1012 rel_skb: 1013 __kfree_skb(skb); 1014 } 1015 1016 static void do_rx_data_ddp(struct cxgbi_device *cdev, 1017 struct sk_buff *skb) 1018 { 1019 struct cxgbi_sock *csk; 1020 struct sk_buff *lskb; 1021 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 1022 unsigned int tid = GET_TID(rpl); 1023 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1024 struct tid_info *t = lldi->tids; 1025 unsigned int status = ntohl(rpl->ddpvld); 1026 1027 csk = lookup_tid(t, tid); 1028 if (unlikely(!csk)) { 1029 pr_err("can't find connection for tid %u.\n", tid); 1030 goto rel_skb; 1031 } 1032 1033 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 1034 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 1035 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 1036 1037 spin_lock_bh(&csk->lock); 1038 1039 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 1040 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1041 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 1042 csk, csk->state, csk->flags, csk->tid); 1043 if (csk->state != CTP_ABORTING) 1044 goto abort_conn; 1045 else 1046 goto discard; 1047 } 1048 1049 if (!csk->skb_ulp_lhdr) { 1050 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 1051 goto abort_conn; 1052 } 1053 1054 lskb = csk->skb_ulp_lhdr; 1055 csk->skb_ulp_lhdr = NULL; 1056 1057 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 1058 1059 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 1060 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 1061 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 1062 1063 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 1064 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", 1065 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1066 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 1067 } 1068 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 1069 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", 1070 csk, lskb, status, cxgbi_skcb_flags(lskb)); 1071 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1072 } 1073 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1074 log_debug(1 << CXGBI_DBG_PDU_RX, 1075 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1076 csk, lskb, status); 1077 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1078 } 1079 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1080 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1081 log_debug(1 << CXGBI_DBG_PDU_RX, 1082 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1083 csk, lskb, status); 1084 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1085 } 1086 log_debug(1 << CXGBI_DBG_PDU_RX, 1087 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1088 csk, lskb, cxgbi_skcb_flags(lskb)); 1089 1090 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 1091 cxgbi_conn_pdu_ready(csk); 1092 spin_unlock_bh(&csk->lock); 1093 goto rel_skb; 1094 1095 abort_conn: 1096 send_abort_req(csk); 1097 discard: 1098 spin_unlock_bh(&csk->lock); 1099 rel_skb: 1100 __kfree_skb(skb); 1101 } 1102 1103 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1104 { 1105 struct cxgbi_sock *csk; 1106 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1107 unsigned int tid = GET_TID(rpl); 1108 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1109 struct tid_info *t = lldi->tids; 1110 1111 csk = lookup_tid(t, tid); 1112 if (unlikely(!csk)) 1113 pr_err("can't find connection for tid %u.\n", tid); 1114 else { 1115 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1116 "csk 0x%p,%u,0x%lx,%u.\n", 1117 csk, csk->state, csk->flags, csk->tid); 1118 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1119 rpl->seq_vld); 1120 } 1121 __kfree_skb(skb); 1122 } 1123 1124 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1125 { 1126 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1127 unsigned int tid = GET_TID(rpl); 1128 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1129 struct tid_info *t = lldi->tids; 1130 struct cxgbi_sock *csk; 1131 1132 csk = lookup_tid(t, tid); 1133 if (!csk) 1134 pr_err("can't find conn. for tid %u.\n", tid); 1135 1136 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1137 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1138 csk, csk->state, csk->flags, csk->tid, rpl->status); 1139 1140 if (rpl->status != CPL_ERR_NONE) 1141 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1142 csk, tid, rpl->status); 1143 1144 __kfree_skb(skb); 1145 } 1146 1147 static int alloc_cpls(struct cxgbi_sock *csk) 1148 { 1149 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 1150 0, GFP_KERNEL); 1151 if (!csk->cpl_close) 1152 return -ENOMEM; 1153 1154 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 1155 0, GFP_KERNEL); 1156 if (!csk->cpl_abort_req) 1157 goto free_cpls; 1158 1159 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 1160 0, GFP_KERNEL); 1161 if (!csk->cpl_abort_rpl) 1162 goto free_cpls; 1163 return 0; 1164 1165 free_cpls: 1166 cxgbi_sock_free_cpl_skbs(csk); 1167 return -ENOMEM; 1168 } 1169 1170 static inline void l2t_put(struct cxgbi_sock *csk) 1171 { 1172 if (csk->l2t) { 1173 cxgb4_l2t_release(csk->l2t); 1174 csk->l2t = NULL; 1175 cxgbi_sock_put(csk); 1176 } 1177 } 1178 1179 static void release_offload_resources(struct cxgbi_sock *csk) 1180 { 1181 struct cxgb4_lld_info *lldi; 1182 1183 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1184 "csk 0x%p,%u,0x%lx,%u.\n", 1185 csk, csk->state, csk->flags, csk->tid); 1186 1187 cxgbi_sock_free_cpl_skbs(csk); 1188 if (csk->wr_cred != csk->wr_max_cred) { 1189 cxgbi_sock_purge_wr_queue(csk); 1190 cxgbi_sock_reset_wr_list(csk); 1191 } 1192 1193 l2t_put(csk); 1194 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1195 free_atid(csk); 1196 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1197 lldi = cxgbi_cdev_priv(csk->cdev); 1198 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1199 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1200 cxgbi_sock_put(csk); 1201 } 1202 csk->dst = NULL; 1203 csk->cdev = NULL; 1204 } 1205 1206 static int init_act_open(struct cxgbi_sock *csk) 1207 { 1208 struct cxgbi_device *cdev = csk->cdev; 1209 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1210 struct net_device *ndev = cdev->ports[csk->port_id]; 1211 struct port_info *pi = netdev_priv(ndev); 1212 struct sk_buff *skb = NULL; 1213 struct neighbour *n; 1214 unsigned int step; 1215 1216 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1217 "csk 0x%p,%u,0x%lx,%u.\n", 1218 csk, csk->state, csk->flags, csk->tid); 1219 1220 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1221 if (csk->atid < 0) { 1222 pr_err("%s, NO atid available.\n", ndev->name); 1223 return -EINVAL; 1224 } 1225 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1226 cxgbi_sock_get(csk); 1227 1228 n = dst_neigh_lookup(csk->dst, &csk->daddr.sin_addr.s_addr); 1229 if (!n) { 1230 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); 1231 goto rel_resource; 1232 } 1233 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); 1234 if (!csk->l2t) { 1235 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1236 goto rel_resource; 1237 } 1238 cxgbi_sock_get(csk); 1239 1240 skb = alloc_wr(is_t4(lldi->adapter_type) ? 1241 sizeof(struct cpl_act_open_req) : 1242 sizeof(struct cpl_t5_act_open_req), 1243 0, GFP_ATOMIC); 1244 if (!skb) 1245 goto rel_resource; 1246 skb->sk = (struct sock *)csk; 1247 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1248 1249 if (!csk->mtu) 1250 csk->mtu = dst_mtu(csk->dst); 1251 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1252 csk->tx_chan = cxgb4_port_chan(ndev); 1253 /* SMT two entries per row */ 1254 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1255 step = lldi->ntxq / lldi->nchan; 1256 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1257 step = lldi->nrxq / lldi->nchan; 1258 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1259 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred; 1260 csk->wr_una_cred = 0; 1261 cxgbi_sock_reset_wr_list(csk); 1262 csk->err = 0; 1263 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1264 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n", 1265 csk, pi->port_id, ndev->name, csk->tx_chan, 1266 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, 1267 csk->smac_idx); 1268 1269 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1270 send_act_open_req(csk, skb, csk->l2t); 1271 neigh_release(n); 1272 return 0; 1273 1274 rel_resource: 1275 if (n) 1276 neigh_release(n); 1277 if (skb) 1278 __kfree_skb(skb); 1279 return -EINVAL; 1280 } 1281 1282 #define CPL_ISCSI_DATA 0xB2 1283 #define CPL_RX_ISCSI_DDP 0x49 1284 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1285 [CPL_ACT_ESTABLISH] = do_act_establish, 1286 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1287 [CPL_PEER_CLOSE] = do_peer_close, 1288 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1289 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1290 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1291 [CPL_FW4_ACK] = do_fw4_ack, 1292 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1293 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr, 1294 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1295 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1296 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp, 1297 }; 1298 1299 int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1300 { 1301 int rc; 1302 1303 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1304 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1305 1306 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1307 cxgb4i_max_connect); 1308 if (rc < 0) 1309 return rc; 1310 1311 cdev->csk_release_offload_resources = release_offload_resources; 1312 cdev->csk_push_tx_frames = push_tx_frames; 1313 cdev->csk_send_abort_req = send_abort_req; 1314 cdev->csk_send_close_req = send_close_req; 1315 cdev->csk_send_rx_credits = send_rx_credits; 1316 cdev->csk_alloc_cpls = alloc_cpls; 1317 cdev->csk_init_act_open = init_act_open; 1318 1319 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1320 return 0; 1321 } 1322 1323 /* 1324 * functions to program the pagepod in h/w 1325 */ 1326 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 1327 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi, 1328 struct ulp_mem_io *req, 1329 unsigned int wr_len, unsigned int dlen, 1330 unsigned int pm_addr) 1331 { 1332 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); 1333 1334 INIT_ULPTX_WR(req, wr_len, 0, 0); 1335 if (is_t4(lldi->adapter_type)) 1336 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | 1337 (ULP_MEMIO_ORDER(1))); 1338 else 1339 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | 1340 (V_T5_ULP_MEMIO_IMM(1))); 1341 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); 1342 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); 1343 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1344 1345 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM)); 1346 idata->len = htonl(dlen); 1347 } 1348 1349 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, 1350 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1351 unsigned int npods, 1352 struct cxgbi_gather_list *gl, 1353 unsigned int gl_pidx) 1354 { 1355 struct cxgbi_ddp_info *ddp = cdev->ddp; 1356 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1357 struct sk_buff *skb; 1358 struct ulp_mem_io *req; 1359 struct ulptx_idata *idata; 1360 struct cxgbi_pagepod *ppod; 1361 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; 1362 unsigned int dlen = PPOD_SIZE * npods; 1363 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1364 sizeof(struct ulptx_idata) + dlen, 16); 1365 unsigned int i; 1366 1367 skb = alloc_wr(wr_len, 0, GFP_ATOMIC); 1368 if (!skb) { 1369 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1370 cdev, idx, npods); 1371 return -ENOMEM; 1372 } 1373 req = (struct ulp_mem_io *)skb->head; 1374 set_queue(skb, CPL_PRIORITY_CONTROL, NULL); 1375 1376 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr); 1377 idata = (struct ulptx_idata *)(req + 1); 1378 ppod = (struct cxgbi_pagepod *)(idata + 1); 1379 1380 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1381 if (!hdr && !gl) 1382 cxgbi_ddp_ppod_clear(ppod); 1383 else 1384 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1385 } 1386 1387 cxgb4_ofld_send(cdev->ports[port_id], skb); 1388 return 0; 1389 } 1390 1391 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1392 unsigned int idx, unsigned int npods, 1393 struct cxgbi_gather_list *gl) 1394 { 1395 unsigned int i, cnt; 1396 int err = 0; 1397 1398 for (i = 0; i < npods; i += cnt, idx += cnt) { 1399 cnt = npods - i; 1400 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1401 cnt = ULPMEM_IDATA_MAX_NPPODS; 1402 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, 1403 idx, cnt, gl, 4 * i); 1404 if (err < 0) 1405 break; 1406 } 1407 return err; 1408 } 1409 1410 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1411 unsigned int idx, unsigned int npods) 1412 { 1413 unsigned int i, cnt; 1414 int err; 1415 1416 for (i = 0; i < npods; i += cnt, idx += cnt) { 1417 cnt = npods - i; 1418 if (cnt > ULPMEM_IDATA_MAX_NPPODS) 1419 cnt = ULPMEM_IDATA_MAX_NPPODS; 1420 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, 1421 idx, cnt, NULL, 0); 1422 if (err < 0) 1423 break; 1424 } 1425 } 1426 1427 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1428 int pg_idx, bool reply) 1429 { 1430 struct sk_buff *skb; 1431 struct cpl_set_tcb_field *req; 1432 1433 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) 1434 return 0; 1435 1436 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1437 if (!skb) 1438 return -ENOMEM; 1439 1440 /* set up ulp page size */ 1441 req = (struct cpl_set_tcb_field *)skb->head; 1442 INIT_TP_WR(req, csk->tid); 1443 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1444 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1445 req->word_cookie = htons(0); 1446 req->mask = cpu_to_be64(0x3 << 8); 1447 req->val = cpu_to_be64(pg_idx << 8); 1448 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1449 1450 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1451 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1452 1453 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1454 return 0; 1455 } 1456 1457 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1458 int hcrc, int dcrc, int reply) 1459 { 1460 struct sk_buff *skb; 1461 struct cpl_set_tcb_field *req; 1462 1463 if (!hcrc && !dcrc) 1464 return 0; 1465 1466 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); 1467 if (!skb) 1468 return -ENOMEM; 1469 1470 csk->hcrc_len = (hcrc ? 4 : 0); 1471 csk->dcrc_len = (dcrc ? 4 : 0); 1472 /* set up ulp submode */ 1473 req = (struct cpl_set_tcb_field *)skb->head; 1474 INIT_TP_WR(req, tid); 1475 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1476 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1477 req->word_cookie = htons(0); 1478 req->mask = cpu_to_be64(0x3 << 4); 1479 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1480 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1481 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1482 1483 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1484 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1485 1486 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1487 return 0; 1488 } 1489 1490 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1491 { 1492 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1493 struct cxgbi_ddp_info *ddp = cdev->ddp; 1494 unsigned int tagmask, pgsz_factor[4]; 1495 int err; 1496 1497 if (ddp) { 1498 kref_get(&ddp->refcnt); 1499 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1500 cdev, cdev->ddp); 1501 return -EALREADY; 1502 } 1503 1504 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1505 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1506 lldi->iscsi_iolen, lldi->iscsi_iolen); 1507 if (err < 0) 1508 return err; 1509 1510 ddp = cdev->ddp; 1511 1512 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1513 cxgbi_ddp_page_size_factor(pgsz_factor); 1514 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1515 1516 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1517 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1518 cdev->csk_ddp_set = ddp_set_map; 1519 cdev->csk_ddp_clear = ddp_clear_map; 1520 1521 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1522 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1523 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1524 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1525 " %u/%u.\n", 1526 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1527 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1528 ddp->max_rxsz, lldi->iscsi_iolen); 1529 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1530 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1531 ddp->max_rxsz); 1532 return 0; 1533 } 1534 1535 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1536 { 1537 struct cxgbi_device *cdev; 1538 struct port_info *pi; 1539 int i, rc; 1540 1541 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1542 if (!cdev) { 1543 pr_info("t4 device 0x%p, register failed.\n", lldi); 1544 return NULL; 1545 } 1546 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1547 cdev, lldi->adapter_type, lldi->nports, 1548 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1549 lldi->nrxq, lldi->wr_cred); 1550 for (i = 0; i < lldi->nrxq; i++) 1551 log_debug(1 << CXGBI_DBG_DEV, 1552 "t4 0x%p, rxq id #%d: %u.\n", 1553 cdev, i, lldi->rxq_ids[i]); 1554 1555 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1556 cdev->flags = CXGBI_FLAG_DEV_T4; 1557 cdev->pdev = lldi->pdev; 1558 cdev->ports = lldi->ports; 1559 cdev->nports = lldi->nports; 1560 cdev->mtus = lldi->mtus; 1561 cdev->nmtus = NMTUS; 1562 cdev->snd_win = cxgb4i_snd_win; 1563 cdev->rcv_win = cxgb4i_rcv_win; 1564 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1565 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1566 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1567 cdev->itp = &cxgb4i_iscsi_transport; 1568 1569 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8; 1570 pr_info("cdev 0x%p,%s, pfvf %u.\n", 1571 cdev, lldi->ports[0]->name, cdev->pfvf); 1572 1573 rc = cxgb4i_ddp_init(cdev); 1574 if (rc) { 1575 pr_info("t4 0x%p ddp init failed.\n", cdev); 1576 goto err_out; 1577 } 1578 rc = cxgb4i_ofld_init(cdev); 1579 if (rc) { 1580 pr_info("t4 0x%p ofld init failed.\n", cdev); 1581 goto err_out; 1582 } 1583 1584 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1585 &cxgb4i_host_template, cxgb4i_stt); 1586 if (rc) 1587 goto err_out; 1588 1589 for (i = 0; i < cdev->nports; i++) { 1590 pi = netdev_priv(lldi->ports[i]); 1591 cdev->hbas[i]->port_id = pi->port_id; 1592 } 1593 return cdev; 1594 1595 err_out: 1596 cxgbi_device_unregister(cdev); 1597 return ERR_PTR(-ENOMEM); 1598 } 1599 1600 #define RX_PULL_LEN 128 1601 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1602 const struct pkt_gl *pgl) 1603 { 1604 const struct cpl_act_establish *rpl; 1605 struct sk_buff *skb; 1606 unsigned int opc; 1607 struct cxgbi_device *cdev = handle; 1608 1609 if (pgl == NULL) { 1610 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1611 1612 skb = alloc_wr(len, 0, GFP_ATOMIC); 1613 if (!skb) 1614 goto nomem; 1615 skb_copy_to_linear_data(skb, &rsp[1], len); 1616 } else { 1617 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1618 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1619 pgl->va, be64_to_cpu(*rsp), 1620 be64_to_cpu(*(u64 *)pgl->va), 1621 pgl->tot_len); 1622 return 0; 1623 } 1624 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1625 if (unlikely(!skb)) 1626 goto nomem; 1627 } 1628 1629 rpl = (struct cpl_act_establish *)skb->data; 1630 opc = rpl->ot.opcode; 1631 log_debug(1 << CXGBI_DBG_TOE, 1632 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1633 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1634 if (cxgb4i_cplhandlers[opc]) 1635 cxgb4i_cplhandlers[opc](cdev, skb); 1636 else { 1637 pr_err("No handler for opcode 0x%x.\n", opc); 1638 __kfree_skb(skb); 1639 } 1640 return 0; 1641 nomem: 1642 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1643 return 1; 1644 } 1645 1646 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1647 { 1648 struct cxgbi_device *cdev = handle; 1649 1650 switch (state) { 1651 case CXGB4_STATE_UP: 1652 pr_info("cdev 0x%p, UP.\n", cdev); 1653 /* re-initialize */ 1654 break; 1655 case CXGB4_STATE_START_RECOVERY: 1656 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1657 /* close all connections */ 1658 break; 1659 case CXGB4_STATE_DOWN: 1660 pr_info("cdev 0x%p, DOWN.\n", cdev); 1661 break; 1662 case CXGB4_STATE_DETACH: 1663 pr_info("cdev 0x%p, DETACH.\n", cdev); 1664 cxgbi_device_unregister(cdev); 1665 break; 1666 default: 1667 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1668 break; 1669 } 1670 return 0; 1671 } 1672 1673 static int __init cxgb4i_init_module(void) 1674 { 1675 int rc; 1676 1677 printk(KERN_INFO "%s", version); 1678 1679 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1680 if (rc < 0) 1681 return rc; 1682 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1683 return 0; 1684 } 1685 1686 static void __exit cxgb4i_exit_module(void) 1687 { 1688 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1689 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1690 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1691 } 1692 1693 module_init(cxgb4i_init_module); 1694 module_exit(cxgb4i_exit_module); 1695