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/version.h> 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 #include <scsi/scsi_host.h> 20 #include <net/tcp.h> 21 #include <net/dst.h> 22 #include <linux/netdevice.h> 23 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 iSCSI Driver" 37 #define DRV_MODULE_VERSION "0.9.0" 38 #define DRV_MODULE_RELDATE "May 2010" 39 40 static char version[] = 41 DRV_MODULE_DESC " " DRV_MODULE_NAME 42 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 43 44 MODULE_AUTHOR("Chelsio Communications, Inc."); 45 MODULE_DESCRIPTION(DRV_MODULE_DESC); 46 MODULE_VERSION(DRV_MODULE_VERSION); 47 MODULE_LICENSE("GPL"); 48 49 module_param(dbg_level, uint, 0644); 50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); 51 52 static int cxgb4i_rcv_win = 256 * 1024; 53 module_param(cxgb4i_rcv_win, int, 0644); 54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); 55 56 static int cxgb4i_snd_win = 128 * 1024; 57 module_param(cxgb4i_snd_win, int, 0644); 58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); 59 60 static int cxgb4i_rx_credit_thres = 10 * 1024; 61 module_param(cxgb4i_rx_credit_thres, int, 0644); 62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres, 63 "RX credits return threshold in bytes (default=10KB)"); 64 65 static unsigned int cxgb4i_max_connect = (8 * 1024); 66 module_param(cxgb4i_max_connect, uint, 0644); 67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); 68 69 static unsigned short cxgb4i_sport_base = 20000; 70 module_param(cxgb4i_sport_base, ushort, 0644); 71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); 72 73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); 74 75 static void *t4_uld_add(const struct cxgb4_lld_info *); 76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); 77 static int t4_uld_state_change(void *, enum cxgb4_state state); 78 79 static const struct cxgb4_uld_info cxgb4i_uld_info = { 80 .name = DRV_MODULE_NAME, 81 .add = t4_uld_add, 82 .rx_handler = t4_uld_rx_handler, 83 .state_change = t4_uld_state_change, 84 }; 85 86 static struct scsi_host_template cxgb4i_host_template = { 87 .module = THIS_MODULE, 88 .name = DRV_MODULE_NAME, 89 .proc_name = DRV_MODULE_NAME, 90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH, 91 .queuecommand = iscsi_queuecommand, 92 .change_queue_depth = iscsi_change_queue_depth, 93 .sg_tablesize = SG_ALL, 94 .max_sectors = 0xFFFF, 95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 96 .eh_abort_handler = iscsi_eh_abort, 97 .eh_device_reset_handler = iscsi_eh_device_reset, 98 .eh_target_reset_handler = iscsi_eh_recover_target, 99 .target_alloc = iscsi_target_alloc, 100 .use_clustering = DISABLE_CLUSTERING, 101 .this_id = -1, 102 }; 103 104 static struct iscsi_transport cxgb4i_iscsi_transport = { 105 .owner = THIS_MODULE, 106 .name = DRV_MODULE_NAME, 107 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | 108 CAP_DATADGST | CAP_DIGEST_OFFLOAD | 109 CAP_PADDING_OFFLOAD, 110 .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH | 111 ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN | 112 ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T | 113 ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST | 114 ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN | 115 ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL | 116 ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | 117 ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT | 118 ISCSI_PERSISTENT_ADDRESS | 119 ISCSI_TARGET_NAME | ISCSI_TPGT | 120 ISCSI_USERNAME | ISCSI_PASSWORD | 121 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | 122 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | 123 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | 124 ISCSI_PING_TMO | ISCSI_RECV_TMO | 125 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, 126 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | 127 ISCSI_HOST_INITIATOR_NAME | 128 ISCSI_HOST_NETDEV_NAME, 129 .get_host_param = cxgbi_get_host_param, 130 .set_host_param = cxgbi_set_host_param, 131 /* session management */ 132 .create_session = cxgbi_create_session, 133 .destroy_session = cxgbi_destroy_session, 134 .get_session_param = iscsi_session_get_param, 135 /* connection management */ 136 .create_conn = cxgbi_create_conn, 137 .bind_conn = cxgbi_bind_conn, 138 .destroy_conn = iscsi_tcp_conn_teardown, 139 .start_conn = iscsi_conn_start, 140 .stop_conn = iscsi_conn_stop, 141 .get_conn_param = cxgbi_get_conn_param, 142 .set_param = cxgbi_set_conn_param, 143 .get_stats = cxgbi_get_conn_stats, 144 /* pdu xmit req from user space */ 145 .send_pdu = iscsi_conn_send_pdu, 146 /* task */ 147 .init_task = iscsi_tcp_task_init, 148 .xmit_task = iscsi_tcp_task_xmit, 149 .cleanup_task = cxgbi_cleanup_task, 150 /* pdu */ 151 .alloc_pdu = cxgbi_conn_alloc_pdu, 152 .init_pdu = cxgbi_conn_init_pdu, 153 .xmit_pdu = cxgbi_conn_xmit_pdu, 154 .parse_pdu_itt = cxgbi_parse_pdu_itt, 155 /* TCP connect/disconnect */ 156 .ep_connect = cxgbi_ep_connect, 157 .ep_poll = cxgbi_ep_poll, 158 .ep_disconnect = cxgbi_ep_disconnect, 159 /* Error recovery timeout call */ 160 .session_recovery_timedout = iscsi_session_recovery_timedout, 161 }; 162 163 static struct scsi_transport_template *cxgb4i_stt; 164 165 /* 166 * CPL (Chelsio Protocol Language) defines a message passing interface between 167 * the host driver and Chelsio asic. 168 * The section below implments CPLs that related to iscsi tcp connection 169 * open/close/abort and data send/receive. 170 */ 171 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 172 #define RCV_BUFSIZ_MASK 0x3FFU 173 #define MAX_IMM_TX_PKT_LEN 128 174 175 static inline void set_queue(struct sk_buff *skb, unsigned int queue, 176 const struct cxgbi_sock *csk) 177 { 178 skb->queue_mapping = queue; 179 } 180 181 static int push_tx_frames(struct cxgbi_sock *, int); 182 183 /* 184 * is_ofld_imm - check whether a packet can be sent as immediate data 185 * @skb: the packet 186 * 187 * Returns true if a packet can be sent as an offload WR with immediate 188 * data. We currently use the same limit as for Ethernet packets. 189 */ 190 static inline int is_ofld_imm(const struct sk_buff *skb) 191 { 192 return skb->len <= (MAX_IMM_TX_PKT_LEN - 193 sizeof(struct fw_ofld_tx_data_wr)); 194 } 195 196 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 197 struct l2t_entry *e) 198 { 199 struct cpl_act_open_req *req; 200 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); 201 unsigned long long opt0; 202 unsigned int opt2; 203 unsigned int qid_atid = ((unsigned int)csk->atid) | 204 (((unsigned int)csk->rss_qid) << 14); 205 206 opt0 = KEEP_ALIVE(1) | 207 WND_SCALE(wscale) | 208 MSS_IDX(csk->mss_idx) | 209 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | 210 TX_CHAN(csk->tx_chan) | 211 SMAC_SEL(csk->smac_idx) | 212 ULP_MODE(ULP_MODE_ISCSI) | 213 RCV_BUFSIZ(cxgb4i_rcv_win >> 10); 214 opt2 = RX_CHANNEL(0) | 215 RSS_QUEUE_VALID | 216 (1 << 20) | (1 << 22) | 217 RSS_QUEUE(csk->rss_qid); 218 219 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); 220 req = (struct cpl_act_open_req *)skb->head; 221 222 INIT_TP_WR(req, 0); 223 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 224 qid_atid)); 225 req->local_port = csk->saddr.sin_port; 226 req->peer_port = csk->daddr.sin_port; 227 req->local_ip = csk->saddr.sin_addr.s_addr; 228 req->peer_ip = csk->daddr.sin_addr.s_addr; 229 req->opt0 = cpu_to_be64(opt0); 230 req->params = 0; 231 req->opt2 = cpu_to_be32(opt2); 232 233 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 234 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", 235 csk, &req->local_ip, ntohs(req->local_port), 236 &req->peer_ip, ntohs(req->peer_port), 237 csk->atid, csk->rss_qid); 238 239 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 240 } 241 242 static void send_close_req(struct cxgbi_sock *csk) 243 { 244 struct sk_buff *skb = csk->cpl_close; 245 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 246 unsigned int tid = csk->tid; 247 248 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 249 "csk 0x%p,%u,0x%lx, tid %u.\n", 250 csk, csk->state, csk->flags, csk->tid); 251 csk->cpl_close = NULL; 252 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); 253 INIT_TP_WR(req, tid); 254 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 255 req->rsvd = 0; 256 257 cxgbi_sock_skb_entail(csk, skb); 258 if (csk->state >= CTP_ESTABLISHED) 259 push_tx_frames(csk, 1); 260 } 261 262 static void abort_arp_failure(void *handle, struct sk_buff *skb) 263 { 264 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; 265 struct cpl_abort_req *req; 266 267 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 268 "csk 0x%p,%u,0x%lx, tid %u, abort.\n", 269 csk, csk->state, csk->flags, csk->tid); 270 req = (struct cpl_abort_req *)skb->data; 271 req->cmd = CPL_ABORT_NO_RST; 272 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 273 } 274 275 static void send_abort_req(struct cxgbi_sock *csk) 276 { 277 struct cpl_abort_req *req; 278 struct sk_buff *skb = csk->cpl_abort_req; 279 280 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) 281 return; 282 cxgbi_sock_set_state(csk, CTP_ABORTING); 283 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 284 cxgbi_sock_purge_write_queue(csk); 285 286 csk->cpl_abort_req = NULL; 287 req = (struct cpl_abort_req *)skb->head; 288 set_queue(skb, CPL_PRIORITY_DATA, csk); 289 req->cmd = CPL_ABORT_SEND_RST; 290 t4_set_arp_err_handler(skb, csk, abort_arp_failure); 291 INIT_TP_WR(req, csk->tid); 292 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 293 req->rsvd0 = htonl(csk->snd_nxt); 294 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 295 296 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 297 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 298 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 299 req->rsvd1); 300 301 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 302 } 303 304 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 305 { 306 struct sk_buff *skb = csk->cpl_abort_rpl; 307 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 308 309 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 310 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 311 csk, csk->state, csk->flags, csk->tid, rst_status); 312 313 csk->cpl_abort_rpl = NULL; 314 set_queue(skb, CPL_PRIORITY_DATA, csk); 315 INIT_TP_WR(rpl, csk->tid); 316 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 317 rpl->cmd = rst_status; 318 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 319 } 320 321 /* 322 * CPL connection rx data ack: host -> 323 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 324 * credits sent. 325 */ 326 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 327 { 328 struct sk_buff *skb; 329 struct cpl_rx_data_ack *req; 330 331 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 332 "csk 0x%p,%u,0x%lx,%u, credit %u.\n", 333 csk, csk->state, csk->flags, csk->tid, credits); 334 335 skb = alloc_cpl(sizeof(*req), 0, GFP_ATOMIC); 336 if (!skb) { 337 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 338 return 0; 339 } 340 req = (struct cpl_rx_data_ack *)skb->head; 341 342 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); 343 INIT_TP_WR(req, csk->tid); 344 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 345 csk->tid)); 346 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1)); 347 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 348 return credits; 349 } 350 351 /* 352 * sgl_len - calculates the size of an SGL of the given capacity 353 * @n: the number of SGL entries 354 * Calculates the number of flits needed for a scatter/gather list that 355 * can hold the given number of entries. 356 */ 357 static inline unsigned int sgl_len(unsigned int n) 358 { 359 n--; 360 return (3 * n) / 2 + (n & 1) + 2; 361 } 362 363 /* 364 * calc_tx_flits_ofld - calculate # of flits for an offload packet 365 * @skb: the packet 366 * 367 * Returns the number of flits needed for the given offload packet. 368 * These packets are already fully constructed and no additional headers 369 * will be added. 370 */ 371 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) 372 { 373 unsigned int flits, cnt; 374 375 if (is_ofld_imm(skb)) 376 return DIV_ROUND_UP(skb->len, 8); 377 flits = skb_transport_offset(skb) / 8; 378 cnt = skb_shinfo(skb)->nr_frags; 379 if (skb->tail != skb->transport_header) 380 cnt++; 381 return flits + sgl_len(cnt); 382 } 383 384 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) 385 { 386 struct sk_buff *skb; 387 struct fw_flowc_wr *flowc; 388 int flowclen, i; 389 390 flowclen = 80; 391 skb = alloc_cpl(flowclen, 0, GFP_ATOMIC); 392 flowc = (struct fw_flowc_wr *)skb->head; 393 flowc->op_to_nparams = 394 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); 395 flowc->flowid_len16 = 396 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | 397 FW_WR_FLOWID(csk->tid)); 398 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 399 flowc->mnemval[0].val = htonl(0); 400 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 401 flowc->mnemval[1].val = htonl(csk->tx_chan); 402 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 403 flowc->mnemval[2].val = htonl(csk->tx_chan); 404 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 405 flowc->mnemval[3].val = htonl(csk->rss_qid); 406 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 407 flowc->mnemval[4].val = htonl(csk->snd_nxt); 408 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 409 flowc->mnemval[5].val = htonl(csk->rcv_nxt); 410 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 411 flowc->mnemval[6].val = htonl(cxgb4i_snd_win); 412 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 413 flowc->mnemval[7].val = htonl(csk->advmss); 414 flowc->mnemval[8].mnemonic = 0; 415 flowc->mnemval[8].val = 0; 416 for (i = 0; i < 9; i++) { 417 flowc->mnemval[i].r4[0] = 0; 418 flowc->mnemval[i].r4[1] = 0; 419 flowc->mnemval[i].r4[2] = 0; 420 } 421 set_queue(skb, CPL_PRIORITY_DATA, csk); 422 423 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 424 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", 425 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, 426 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, 427 csk->advmss); 428 429 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 430 } 431 432 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 433 int dlen, int len, u32 credits, int compl) 434 { 435 struct fw_ofld_tx_data_wr *req; 436 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; 437 unsigned int wr_ulp_mode = 0; 438 439 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); 440 441 if (is_ofld_imm(skb)) { 442 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 443 FW_WR_COMPL(1) | 444 FW_WR_IMMDLEN(dlen)); 445 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | 446 FW_WR_LEN16(credits)); 447 } else { 448 req->op_to_immdlen = 449 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | 450 FW_WR_COMPL(1) | 451 FW_WR_IMMDLEN(0)); 452 req->flowid_len16 = 453 cpu_to_be32(FW_WR_FLOWID(csk->tid) | 454 FW_WR_LEN16(credits)); 455 } 456 if (submode) 457 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | 458 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); 459 req->tunnel_to_proxy = htonl(wr_ulp_mode) | 460 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1); 461 req->plen = htonl(len); 462 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) 463 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 464 } 465 466 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) 467 { 468 kfree_skb(skb); 469 } 470 471 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 472 { 473 int total_size = 0; 474 struct sk_buff *skb; 475 476 if (unlikely(csk->state < CTP_ESTABLISHED || 477 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 478 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | 479 1 << CXGBI_DBG_PDU_TX, 480 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 481 csk, csk->state, csk->flags, csk->tid); 482 return 0; 483 } 484 485 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 486 int dlen = skb->len; 487 int len = skb->len; 488 unsigned int credits_needed; 489 490 skb_reset_transport_header(skb); 491 if (is_ofld_imm(skb)) 492 credits_needed = DIV_ROUND_UP(dlen + 493 sizeof(struct fw_ofld_tx_data_wr), 16); 494 else 495 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) 496 + sizeof(struct fw_ofld_tx_data_wr), 497 16); 498 499 if (csk->wr_cred < credits_needed) { 500 log_debug(1 << CXGBI_DBG_PDU_TX, 501 "csk 0x%p, skb %u/%u, wr %d < %u.\n", 502 csk, skb->len, skb->data_len, 503 credits_needed, csk->wr_cred); 504 break; 505 } 506 __skb_unlink(skb, &csk->write_queue); 507 set_queue(skb, CPL_PRIORITY_DATA, csk); 508 skb->csum = credits_needed; 509 csk->wr_cred -= credits_needed; 510 csk->wr_una_cred += credits_needed; 511 cxgbi_sock_enqueue_wr(csk, skb); 512 513 log_debug(1 << CXGBI_DBG_PDU_TX, 514 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", 515 csk, skb->len, skb->data_len, credits_needed, 516 csk->wr_cred, csk->wr_una_cred); 517 518 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 519 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 520 send_tx_flowc_wr(csk); 521 skb->csum += 5; 522 csk->wr_cred -= 5; 523 csk->wr_una_cred += 5; 524 } 525 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); 526 make_tx_data_wr(csk, skb, dlen, len, credits_needed, 527 req_completion); 528 csk->snd_nxt += len; 529 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 530 } 531 total_size += skb->truesize; 532 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); 533 534 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 535 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", 536 csk, csk->state, csk->flags, csk->tid, skb, len); 537 538 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); 539 } 540 return total_size; 541 } 542 543 static inline void free_atid(struct cxgbi_sock *csk) 544 { 545 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); 546 547 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 548 cxgb4_free_atid(lldi->tids, csk->atid); 549 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 550 cxgbi_sock_put(csk); 551 } 552 } 553 554 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) 555 { 556 struct cxgbi_sock *csk; 557 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; 558 unsigned short tcp_opt = ntohs(req->tcp_opt); 559 unsigned int tid = GET_TID(req); 560 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); 561 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 562 struct tid_info *t = lldi->tids; 563 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 564 565 csk = lookup_atid(t, atid); 566 if (unlikely(!csk)) { 567 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); 568 goto rel_skb; 569 } 570 571 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 572 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n", 573 csk, csk->state, csk->flags, tid, atid, rcv_isn); 574 575 cxgbi_sock_get(csk); 576 csk->tid = tid; 577 cxgb4_insert_tid(lldi->tids, csk, tid); 578 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 579 580 free_atid(csk); 581 582 spin_lock_bh(&csk->lock); 583 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 584 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 585 csk, csk->state, csk->flags, csk->tid); 586 587 if (csk->retry_timer.function) { 588 del_timer(&csk->retry_timer); 589 csk->retry_timer.function = NULL; 590 } 591 592 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 593 /* 594 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't 595 * pass through opt0. 596 */ 597 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) 598 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); 599 600 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; 601 if (GET_TCPOPT_TSTAMP(tcp_opt)) 602 csk->advmss -= 12; 603 if (csk->advmss < 128) 604 csk->advmss = 128; 605 606 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 607 "csk 0x%p, mss_idx %u, advmss %u.\n", 608 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss); 609 610 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 611 612 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 613 send_abort_req(csk); 614 else { 615 if (skb_queue_len(&csk->write_queue)) 616 push_tx_frames(csk, 0); 617 cxgbi_conn_tx_open(csk); 618 } 619 spin_unlock_bh(&csk->lock); 620 621 rel_skb: 622 __kfree_skb(skb); 623 } 624 625 static int act_open_rpl_status_to_errno(int status) 626 { 627 switch (status) { 628 case CPL_ERR_CONN_RESET: 629 return -ECONNREFUSED; 630 case CPL_ERR_ARP_MISS: 631 return -EHOSTUNREACH; 632 case CPL_ERR_CONN_TIMEDOUT: 633 return -ETIMEDOUT; 634 case CPL_ERR_TCAM_FULL: 635 return -ENOMEM; 636 case CPL_ERR_CONN_EXIST: 637 return -EADDRINUSE; 638 default: 639 return -EIO; 640 } 641 } 642 643 static void csk_act_open_retry_timer(unsigned long data) 644 { 645 struct sk_buff *skb; 646 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 647 648 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 649 "csk 0x%p,%u,0x%lx,%u.\n", 650 csk, csk->state, csk->flags, csk->tid); 651 652 cxgbi_sock_get(csk); 653 spin_lock_bh(&csk->lock); 654 skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); 655 if (!skb) 656 cxgbi_sock_fail_act_open(csk, -ENOMEM); 657 else { 658 skb->sk = (struct sock *)csk; 659 t4_set_arp_err_handler(skb, csk, 660 cxgbi_sock_act_open_req_arp_failure); 661 send_act_open_req(csk, skb, csk->l2t); 662 } 663 spin_unlock_bh(&csk->lock); 664 cxgbi_sock_put(csk); 665 } 666 667 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 668 { 669 struct cxgbi_sock *csk; 670 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; 671 unsigned int tid = GET_TID(rpl); 672 unsigned int atid = 673 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); 674 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status)); 675 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 676 struct tid_info *t = lldi->tids; 677 678 csk = lookup_atid(t, atid); 679 if (unlikely(!csk)) { 680 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); 681 goto rel_skb; 682 } 683 684 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 685 "csk 0x%p,%u,0x%lx, status %u, atid %u, tid %u.\n", 686 csk, csk->state, csk->flags, status, atid, tid); 687 688 if (status && status != CPL_ERR_TCAM_FULL && 689 status != CPL_ERR_CONN_EXIST && 690 status != CPL_ERR_ARP_MISS) 691 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); 692 693 cxgbi_sock_get(csk); 694 spin_lock_bh(&csk->lock); 695 696 if (status == CPL_ERR_CONN_EXIST && 697 csk->retry_timer.function != csk_act_open_retry_timer) { 698 csk->retry_timer.function = csk_act_open_retry_timer; 699 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 700 } else 701 cxgbi_sock_fail_act_open(csk, 702 act_open_rpl_status_to_errno(status)); 703 704 spin_unlock_bh(&csk->lock); 705 cxgbi_sock_put(csk); 706 rel_skb: 707 __kfree_skb(skb); 708 } 709 710 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) 711 { 712 struct cxgbi_sock *csk; 713 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; 714 unsigned int tid = GET_TID(req); 715 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 716 struct tid_info *t = lldi->tids; 717 718 csk = lookup_tid(t, tid); 719 if (unlikely(!csk)) { 720 pr_err("can't find connection for tid %u.\n", tid); 721 goto rel_skb; 722 } 723 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 724 "csk 0x%p,%u,0x%lx,%u.\n", 725 csk, csk->state, csk->flags, csk->tid); 726 cxgbi_sock_rcv_peer_close(csk); 727 rel_skb: 728 __kfree_skb(skb); 729 } 730 731 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 732 { 733 struct cxgbi_sock *csk; 734 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; 735 unsigned int tid = GET_TID(rpl); 736 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 737 struct tid_info *t = lldi->tids; 738 739 csk = lookup_tid(t, tid); 740 if (unlikely(!csk)) { 741 pr_err("can't find connection for tid %u.\n", tid); 742 goto rel_skb; 743 } 744 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 745 "csk 0x%p,%u,0x%lx,%u.\n", 746 csk, csk->state, csk->flags, csk->tid); 747 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 748 rel_skb: 749 __kfree_skb(skb); 750 } 751 752 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 753 int *need_rst) 754 { 755 switch (abort_reason) { 756 case CPL_ERR_BAD_SYN: /* fall through */ 757 case CPL_ERR_CONN_RESET: 758 return csk->state > CTP_ESTABLISHED ? 759 -EPIPE : -ECONNRESET; 760 case CPL_ERR_XMIT_TIMEDOUT: 761 case CPL_ERR_PERSIST_TIMEDOUT: 762 case CPL_ERR_FINWAIT2_TIMEDOUT: 763 case CPL_ERR_KEEPALIVE_TIMEDOUT: 764 return -ETIMEDOUT; 765 default: 766 return -EIO; 767 } 768 } 769 770 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 771 { 772 struct cxgbi_sock *csk; 773 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; 774 unsigned int tid = GET_TID(req); 775 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 776 struct tid_info *t = lldi->tids; 777 int rst_status = CPL_ABORT_NO_RST; 778 779 csk = lookup_tid(t, tid); 780 if (unlikely(!csk)) { 781 pr_err("can't find connection for tid %u.\n", tid); 782 goto rel_skb; 783 } 784 785 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 786 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n", 787 csk, csk->state, csk->flags, csk->tid, req->status); 788 789 if (req->status == CPL_ERR_RTX_NEG_ADVICE || 790 req->status == CPL_ERR_PERSIST_NEG_ADVICE) 791 goto rel_skb; 792 793 cxgbi_sock_get(csk); 794 spin_lock_bh(&csk->lock); 795 796 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { 797 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 798 cxgbi_sock_set_state(csk, CTP_ABORTING); 799 goto done; 800 } 801 802 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 803 send_abort_rpl(csk, rst_status); 804 805 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 806 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 807 cxgbi_sock_closed(csk); 808 } 809 done: 810 spin_unlock_bh(&csk->lock); 811 cxgbi_sock_put(csk); 812 rel_skb: 813 __kfree_skb(skb); 814 } 815 816 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) 817 { 818 struct cxgbi_sock *csk; 819 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; 820 unsigned int tid = GET_TID(rpl); 821 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 822 struct tid_info *t = lldi->tids; 823 824 csk = lookup_tid(t, tid); 825 if (!csk) 826 goto rel_skb; 827 828 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 829 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", 830 rpl->status, csk, csk ? csk->state : 0, 831 csk ? csk->flags : 0UL); 832 833 if (rpl->status == CPL_ERR_ABORT_FAILED) 834 goto rel_skb; 835 836 cxgbi_sock_rcv_abort_rpl(csk); 837 rel_skb: 838 __kfree_skb(skb); 839 } 840 841 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) 842 { 843 struct cxgbi_sock *csk; 844 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; 845 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); 846 unsigned int tid = GET_TID(cpl); 847 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 848 struct tid_info *t = lldi->tids; 849 struct sk_buff *lskb; 850 851 csk = lookup_tid(t, tid); 852 if (unlikely(!csk)) { 853 pr_err("can't find conn. for tid %u.\n", tid); 854 goto rel_skb; 855 } 856 857 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 858 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", 859 csk, csk->state, csk->flags, csk->tid, skb, skb->len, 860 pdu_len_ddp); 861 862 spin_lock_bh(&csk->lock); 863 864 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 865 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 866 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 867 csk, csk->state, csk->flags, csk->tid); 868 if (csk->state != CTP_ABORTING) 869 goto abort_conn; 870 else 871 goto discard; 872 } 873 874 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); 875 skb_reset_transport_header(skb); 876 __skb_pull(skb, sizeof(*cpl)); 877 __pskb_trim(skb, ntohs(cpl->len)); 878 879 if (!csk->skb_ulp_lhdr) { 880 unsigned char *bhs; 881 unsigned int hlen, dlen; 882 883 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 884 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", 885 csk, csk->state, csk->flags, csk->tid, skb); 886 csk->skb_ulp_lhdr = skb; 887 lskb = csk->skb_ulp_lhdr; 888 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HDR); 889 890 if (cxgbi_skcb_tcp_seq(lskb) != csk->rcv_nxt) { 891 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", 892 csk->tid, cxgbi_skcb_tcp_seq(lskb), 893 csk->rcv_nxt); 894 goto abort_conn; 895 } 896 897 bhs = lskb->data; 898 hlen = ntohs(cpl->len); 899 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; 900 901 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) { 902 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " 903 "mismatch %u != %u + %u, seq 0x%x.\n", 904 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40, 905 hlen, dlen, cxgbi_skcb_tcp_seq(skb)); 906 goto abort_conn; 907 } 908 909 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); 910 if (dlen) 911 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; 912 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); 913 914 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 915 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", 916 csk, skb, *bhs, hlen, dlen, 917 ntohl(*((unsigned int *)(bhs + 16))), 918 ntohl(*((unsigned int *)(bhs + 24)))); 919 920 } else { 921 lskb = csk->skb_ulp_lhdr; 922 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); 923 924 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 925 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", 926 csk, csk->state, csk->flags, skb, lskb); 927 } 928 929 __skb_queue_tail(&csk->receive_queue, skb); 930 spin_unlock_bh(&csk->lock); 931 return; 932 933 abort_conn: 934 send_abort_req(csk); 935 discard: 936 spin_unlock_bh(&csk->lock); 937 rel_skb: 938 __kfree_skb(skb); 939 } 940 941 static void do_rx_data_ddp(struct cxgbi_device *cdev, 942 struct sk_buff *skb) 943 { 944 struct cxgbi_sock *csk; 945 struct sk_buff *lskb; 946 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; 947 unsigned int tid = GET_TID(rpl); 948 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 949 struct tid_info *t = lldi->tids; 950 unsigned int status = ntohl(rpl->ddpvld); 951 952 csk = lookup_tid(t, tid); 953 if (unlikely(!csk)) { 954 pr_err("can't find connection for tid %u.\n", tid); 955 goto rel_skb; 956 } 957 958 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 959 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", 960 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); 961 962 spin_lock_bh(&csk->lock); 963 964 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 965 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 966 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 967 csk, csk->state, csk->flags, csk->tid); 968 if (csk->state != CTP_ABORTING) 969 goto abort_conn; 970 else 971 goto discard; 972 } 973 974 if (!csk->skb_ulp_lhdr) { 975 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); 976 goto abort_conn; 977 } 978 979 lskb = csk->skb_ulp_lhdr; 980 csk->skb_ulp_lhdr = NULL; 981 982 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); 983 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); 984 985 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) 986 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", 987 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); 988 989 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { 990 log_debug(1 << CXGBI_DBG_PDU_RX, 991 "csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad.\n", 992 csk, lskb, status); 993 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); 994 } 995 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { 996 log_debug(1 << CXGBI_DBG_PDU_RX, 997 "csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad.\n", 998 csk, lskb, status); 999 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); 1000 } 1001 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { 1002 log_debug(1 << CXGBI_DBG_PDU_RX, 1003 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", 1004 csk, lskb, status); 1005 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); 1006 } 1007 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && 1008 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { 1009 log_debug(1 << CXGBI_DBG_PDU_RX, 1010 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", 1011 csk, lskb, status); 1012 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); 1013 } 1014 log_debug(1 << CXGBI_DBG_PDU_RX, 1015 "csk 0x%p, lskb 0x%p, f 0x%lx.\n", 1016 csk, lskb, cxgbi_skcb_flags(lskb)); 1017 1018 cxgbi_conn_pdu_ready(csk); 1019 spin_unlock_bh(&csk->lock); 1020 goto rel_skb; 1021 1022 abort_conn: 1023 send_abort_req(csk); 1024 discard: 1025 spin_unlock_bh(&csk->lock); 1026 rel_skb: 1027 __kfree_skb(skb); 1028 } 1029 1030 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) 1031 { 1032 struct cxgbi_sock *csk; 1033 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; 1034 unsigned int tid = GET_TID(rpl); 1035 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1036 struct tid_info *t = lldi->tids; 1037 1038 csk = lookup_tid(t, tid); 1039 if (unlikely(!csk)) 1040 pr_err("can't find connection for tid %u.\n", tid); 1041 else { 1042 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1043 "csk 0x%p,%u,0x%lx,%u.\n", 1044 csk, csk->state, csk->flags, csk->tid); 1045 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), 1046 rpl->seq_vld); 1047 } 1048 __kfree_skb(skb); 1049 } 1050 1051 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) 1052 { 1053 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1054 unsigned int tid = GET_TID(rpl); 1055 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1056 struct tid_info *t = lldi->tids; 1057 struct cxgbi_sock *csk; 1058 1059 csk = lookup_tid(t, tid); 1060 if (!csk) 1061 pr_err("can't find conn. for tid %u.\n", tid); 1062 1063 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1064 "csk 0x%p,%u,%lx,%u, status 0x%x.\n", 1065 csk, csk->state, csk->flags, csk->tid, rpl->status); 1066 1067 if (rpl->status != CPL_ERR_NONE) 1068 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", 1069 csk, tid, rpl->status); 1070 1071 __kfree_skb(skb); 1072 } 1073 1074 static int alloc_cpls(struct cxgbi_sock *csk) 1075 { 1076 csk->cpl_close = alloc_cpl(sizeof(struct cpl_close_con_req), 1077 0, GFP_NOIO); 1078 if (!csk->cpl_close) 1079 return -ENOMEM; 1080 1081 csk->cpl_abort_req = alloc_cpl(sizeof(struct cpl_abort_req), 1082 0, GFP_NOIO); 1083 if (!csk->cpl_abort_req) 1084 goto free_cpls; 1085 1086 csk->cpl_abort_rpl = alloc_cpl(sizeof(struct cpl_abort_rpl), 1087 0, GFP_NOIO); 1088 if (!csk->cpl_abort_rpl) 1089 goto free_cpls; 1090 return 0; 1091 1092 free_cpls: 1093 cxgbi_sock_free_cpl_skbs(csk); 1094 return -ENOMEM; 1095 } 1096 1097 static inline void l2t_put(struct cxgbi_sock *csk) 1098 { 1099 if (csk->l2t) { 1100 cxgb4_l2t_release(csk->l2t); 1101 csk->l2t = NULL; 1102 cxgbi_sock_put(csk); 1103 } 1104 } 1105 1106 static void release_offload_resources(struct cxgbi_sock *csk) 1107 { 1108 struct cxgb4_lld_info *lldi; 1109 1110 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1111 "csk 0x%p,%u,0x%lx,%u.\n", 1112 csk, csk->state, csk->flags, csk->tid); 1113 1114 cxgbi_sock_free_cpl_skbs(csk); 1115 if (csk->wr_cred != csk->wr_max_cred) { 1116 cxgbi_sock_purge_wr_queue(csk); 1117 cxgbi_sock_reset_wr_list(csk); 1118 } 1119 1120 l2t_put(csk); 1121 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 1122 free_atid(csk); 1123 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 1124 lldi = cxgbi_cdev_priv(csk->cdev); 1125 cxgb4_remove_tid(lldi->tids, 0, csk->tid); 1126 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 1127 cxgbi_sock_put(csk); 1128 } 1129 csk->dst = NULL; 1130 csk->cdev = NULL; 1131 } 1132 1133 static int init_act_open(struct cxgbi_sock *csk) 1134 { 1135 struct cxgbi_device *cdev = csk->cdev; 1136 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1137 struct net_device *ndev = cdev->ports[csk->port_id]; 1138 struct port_info *pi = netdev_priv(ndev); 1139 struct sk_buff *skb = NULL; 1140 unsigned int step; 1141 1142 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1143 "csk 0x%p,%u,0x%lx,%u.\n", 1144 csk, csk->state, csk->flags, csk->tid); 1145 1146 csk->atid = cxgb4_alloc_atid(lldi->tids, csk); 1147 if (csk->atid < 0) { 1148 pr_err("%s, NO atid available.\n", ndev->name); 1149 return -EINVAL; 1150 } 1151 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 1152 cxgbi_sock_get(csk); 1153 1154 csk->l2t = cxgb4_l2t_get(lldi->l2t, csk->dst->neighbour, ndev, 0); 1155 if (!csk->l2t) { 1156 pr_err("%s, cannot alloc l2t.\n", ndev->name); 1157 goto rel_resource; 1158 } 1159 cxgbi_sock_get(csk); 1160 1161 skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_NOIO); 1162 if (!skb) 1163 goto rel_resource; 1164 skb->sk = (struct sock *)csk; 1165 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); 1166 1167 if (!csk->mtu) 1168 csk->mtu = dst_mtu(csk->dst); 1169 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); 1170 csk->tx_chan = cxgb4_port_chan(ndev); 1171 /* SMT two entries per row */ 1172 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; 1173 step = lldi->ntxq / lldi->nchan; 1174 csk->txq_idx = cxgb4_port_idx(ndev) * step; 1175 step = lldi->nrxq / lldi->nchan; 1176 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; 1177 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred; 1178 csk->wr_una_cred = 0; 1179 cxgbi_sock_reset_wr_list(csk); 1180 csk->err = 0; 1181 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1182 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n", 1183 csk, pi->port_id, ndev->name, csk->tx_chan, 1184 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, 1185 csk->smac_idx); 1186 1187 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1188 send_act_open_req(csk, skb, csk->l2t); 1189 return 0; 1190 1191 rel_resource: 1192 if (skb) 1193 __kfree_skb(skb); 1194 return -EINVAL; 1195 } 1196 1197 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { 1198 [CPL_ACT_ESTABLISH] = do_act_establish, 1199 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1200 [CPL_PEER_CLOSE] = do_peer_close, 1201 [CPL_ABORT_REQ_RSS] = do_abort_req_rss, 1202 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, 1203 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1204 [CPL_FW4_ACK] = do_fw4_ack, 1205 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, 1206 [CPL_SET_TCB_RPL] = do_set_tcb_rpl, 1207 [CPL_RX_DATA_DDP] = do_rx_data_ddp, 1208 }; 1209 1210 int cxgb4i_ofld_init(struct cxgbi_device *cdev) 1211 { 1212 int rc; 1213 1214 if (cxgb4i_max_connect > CXGB4I_MAX_CONN) 1215 cxgb4i_max_connect = CXGB4I_MAX_CONN; 1216 1217 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, 1218 cxgb4i_max_connect); 1219 if (rc < 0) 1220 return rc; 1221 1222 cdev->csk_release_offload_resources = release_offload_resources; 1223 cdev->csk_push_tx_frames = push_tx_frames; 1224 cdev->csk_send_abort_req = send_abort_req; 1225 cdev->csk_send_close_req = send_close_req; 1226 cdev->csk_send_rx_credits = send_rx_credits; 1227 cdev->csk_alloc_cpls = alloc_cpls; 1228 cdev->csk_init_act_open = init_act_open; 1229 1230 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1231 return 0; 1232 } 1233 1234 /* 1235 * functions to program the pagepod in h/w 1236 */ 1237 static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req, 1238 unsigned int dlen, unsigned int pm_addr) 1239 { 1240 struct ulptx_sgl *sgl; 1241 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + 1242 sizeof(struct ulptx_sgl), 16); 1243 1244 INIT_ULPTX_WR(req, wr_len, 0, 0); 1245 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE)); 1246 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); 1247 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); 1248 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); 1249 sgl = (struct ulptx_sgl *)(req + 1); 1250 sgl->cmd_nsge = htonl(ULPTX_CMD(ULP_TX_SC_DSGL) | ULPTX_NSGE(1)); 1251 sgl->len0 = htonl(dlen); 1252 } 1253 1254 static int ddp_ppod_write_sgl(struct cxgbi_device *cdev, unsigned int port_id, 1255 struct cxgbi_pagepod_hdr *hdr, unsigned int idx, 1256 unsigned int npods, 1257 struct cxgbi_gather_list *gl, 1258 unsigned int gl_pidx) 1259 { 1260 struct cxgbi_ddp_info *ddp = cdev->ddp; 1261 unsigned int dlen, pm_addr; 1262 struct sk_buff *skb; 1263 struct ulp_mem_io *req; 1264 struct ulptx_sgl *sgl; 1265 struct cxgbi_pagepod *ppod; 1266 unsigned int i; 1267 1268 dlen = PPOD_SIZE * npods; 1269 pm_addr = idx * PPOD_SIZE + ddp->llimit; 1270 1271 skb = alloc_cpl(sizeof(*req) + sizeof(*sgl), dlen, GFP_ATOMIC); 1272 if (!skb) { 1273 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", 1274 cdev, idx, npods); 1275 return -ENOMEM; 1276 } 1277 req = (struct ulp_mem_io *)skb->head; 1278 set_queue(skb, CPL_PRIORITY_CONTROL, NULL); 1279 1280 ulp_mem_io_set_hdr(req, dlen, pm_addr); 1281 sgl = (struct ulptx_sgl *)(req + 1); 1282 ppod = (struct cxgbi_pagepod *)(sgl + 1); 1283 sgl->addr0 = cpu_to_be64(virt_to_phys(ppod)); 1284 1285 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { 1286 if (!hdr && !gl) 1287 cxgbi_ddp_ppod_clear(ppod); 1288 else 1289 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); 1290 } 1291 1292 cxgb4_ofld_send(cdev->ports[port_id], skb); 1293 return 0; 1294 } 1295 1296 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1297 unsigned int idx, unsigned int npods, 1298 struct cxgbi_gather_list *gl) 1299 { 1300 unsigned int i, cnt; 1301 int err = 0; 1302 1303 for (i = 0; i < npods; i += cnt, idx += cnt) { 1304 cnt = npods - i; 1305 if (cnt > ULPMEM_DSGL_MAX_NPPODS) 1306 cnt = ULPMEM_DSGL_MAX_NPPODS; 1307 err = ddp_ppod_write_sgl(csk->cdev, csk->port_id, hdr, 1308 idx, cnt, gl, 4 * i); 1309 if (err < 0) 1310 break; 1311 } 1312 return err; 1313 } 1314 1315 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1316 unsigned int idx, unsigned int npods) 1317 { 1318 unsigned int i, cnt; 1319 int err; 1320 1321 for (i = 0; i < npods; i += cnt, idx += cnt) { 1322 cnt = npods - i; 1323 if (cnt > ULPMEM_DSGL_MAX_NPPODS) 1324 cnt = ULPMEM_DSGL_MAX_NPPODS; 1325 err = ddp_ppod_write_sgl(chba->cdev, chba->port_id, NULL, 1326 idx, cnt, NULL, 0); 1327 if (err < 0) 1328 break; 1329 } 1330 } 1331 1332 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, 1333 int pg_idx, bool reply) 1334 { 1335 struct sk_buff *skb; 1336 struct cpl_set_tcb_field *req; 1337 u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; 1338 1339 if (!pg_idx) 1340 return 0; 1341 1342 skb = alloc_cpl(sizeof(*req), 0, GFP_KERNEL); 1343 if (!skb) 1344 return -ENOMEM; 1345 1346 /* set up ulp submode and page size */ 1347 val = (val & 0x03) << 2; 1348 val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI); 1349 1350 req = (struct cpl_set_tcb_field *)skb->head; 1351 INIT_TP_WR(req, csk->tid); 1352 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1353 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1354 req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW)); 1355 req->mask = cpu_to_be64(TCB_ULP_TYPE(TCB_ULP_TYPE_MASK)); 1356 req->val = cpu_to_be64(val); 1357 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1358 1359 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1360 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); 1361 1362 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1363 return 0; 1364 } 1365 1366 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1367 int hcrc, int dcrc, int reply) 1368 { 1369 struct sk_buff *skb; 1370 struct cpl_set_tcb_field *req; 1371 u64 val = (hcrc ? ULP_CRC_HEADER : 0) | (dcrc ? ULP_CRC_DATA : 0); 1372 1373 val = TCB_ULP_RAW(val); 1374 val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI); 1375 1376 skb = alloc_cpl(sizeof(*req), 0, GFP_KERNEL); 1377 if (!skb) 1378 return -ENOMEM; 1379 1380 csk->hcrc_len = (hcrc ? 4 : 0); 1381 csk->dcrc_len = (dcrc ? 4 : 0); 1382 /* set up ulp submode and page size */ 1383 req = (struct cpl_set_tcb_field *)skb->head; 1384 INIT_TP_WR(req, tid); 1385 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1386 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); 1387 req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW)); 1388 req->mask = cpu_to_be64(TCB_ULP_RAW(TCB_ULP_RAW_MASK)); 1389 req->val = cpu_to_be64(val); 1390 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); 1391 1392 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1393 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); 1394 1395 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); 1396 return 0; 1397 } 1398 1399 static int cxgb4i_ddp_init(struct cxgbi_device *cdev) 1400 { 1401 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); 1402 struct cxgbi_ddp_info *ddp = cdev->ddp; 1403 unsigned int tagmask, pgsz_factor[4]; 1404 int err; 1405 1406 if (ddp) { 1407 kref_get(&ddp->refcnt); 1408 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", 1409 cdev, cdev->ddp); 1410 return -EALREADY; 1411 } 1412 1413 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, 1414 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, 1415 lldi->iscsi_iolen, lldi->iscsi_iolen); 1416 if (err < 0) 1417 return err; 1418 1419 ddp = cdev->ddp; 1420 1421 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1422 cxgbi_ddp_page_size_factor(pgsz_factor); 1423 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); 1424 1425 cdev->csk_ddp_free_gl_skb = NULL; 1426 cdev->csk_ddp_alloc_gl_skb = NULL; 1427 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1428 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1429 cdev->csk_ddp_set = ddp_set_map; 1430 cdev->csk_ddp_clear = ddp_clear_map; 1431 1432 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", 1433 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, 1434 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); 1435 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1436 " %u/%u.\n", 1437 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1438 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, 1439 ddp->max_rxsz, lldi->iscsi_iolen); 1440 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", 1441 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, 1442 ddp->max_rxsz); 1443 return 0; 1444 } 1445 1446 static void *t4_uld_add(const struct cxgb4_lld_info *lldi) 1447 { 1448 struct cxgbi_device *cdev; 1449 struct port_info *pi; 1450 int i, rc; 1451 1452 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); 1453 if (!cdev) { 1454 pr_info("t4 device 0x%p, register failed.\n", lldi); 1455 return NULL; 1456 } 1457 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", 1458 cdev, lldi->adapter_type, lldi->nports, 1459 lldi->ports[0]->name, lldi->nchan, lldi->ntxq, 1460 lldi->nrxq, lldi->wr_cred); 1461 for (i = 0; i < lldi->nrxq; i++) 1462 log_debug(1 << CXGBI_DBG_DEV, 1463 "t4 0x%p, rxq id #%d: %u.\n", 1464 cdev, i, lldi->rxq_ids[i]); 1465 1466 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); 1467 cdev->flags = CXGBI_FLAG_DEV_T4; 1468 cdev->pdev = lldi->pdev; 1469 cdev->ports = lldi->ports; 1470 cdev->nports = lldi->nports; 1471 cdev->mtus = lldi->mtus; 1472 cdev->nmtus = NMTUS; 1473 cdev->snd_win = cxgb4i_snd_win; 1474 cdev->rcv_win = cxgb4i_rcv_win; 1475 cdev->rx_credit_thres = cxgb4i_rx_credit_thres; 1476 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; 1477 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); 1478 cdev->itp = &cxgb4i_iscsi_transport; 1479 1480 rc = cxgb4i_ddp_init(cdev); 1481 if (rc) { 1482 pr_info("t4 0x%p ddp init failed.\n", cdev); 1483 goto err_out; 1484 } 1485 rc = cxgb4i_ofld_init(cdev); 1486 if (rc) { 1487 pr_info("t4 0x%p ofld init failed.\n", cdev); 1488 goto err_out; 1489 } 1490 1491 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, 1492 &cxgb4i_host_template, cxgb4i_stt); 1493 if (rc) 1494 goto err_out; 1495 1496 for (i = 0; i < cdev->nports; i++) { 1497 pi = netdev_priv(lldi->ports[i]); 1498 cdev->hbas[i]->port_id = pi->port_id; 1499 } 1500 return cdev; 1501 1502 err_out: 1503 cxgbi_device_unregister(cdev); 1504 return ERR_PTR(-ENOMEM); 1505 } 1506 1507 #define RX_PULL_LEN 128 1508 static int t4_uld_rx_handler(void *handle, const __be64 *rsp, 1509 const struct pkt_gl *pgl) 1510 { 1511 const struct cpl_act_establish *rpl; 1512 struct sk_buff *skb; 1513 unsigned int opc; 1514 struct cxgbi_device *cdev = handle; 1515 1516 if (pgl == NULL) { 1517 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1518 1519 skb = alloc_cpl(len, 0, GFP_ATOMIC); 1520 if (!skb) 1521 goto nomem; 1522 skb_copy_to_linear_data(skb, &rsp[1], len); 1523 } else { 1524 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { 1525 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 1526 pgl->va, be64_to_cpu(*rsp), 1527 be64_to_cpu(*(u64 *)pgl->va), 1528 pgl->tot_len); 1529 return 0; 1530 } 1531 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); 1532 if (unlikely(!skb)) 1533 goto nomem; 1534 } 1535 1536 rpl = (struct cpl_act_establish *)skb->data; 1537 opc = rpl->ot.opcode; 1538 log_debug(1 << CXGBI_DBG_TOE, 1539 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 1540 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); 1541 if (cxgb4i_cplhandlers[opc]) 1542 cxgb4i_cplhandlers[opc](cdev, skb); 1543 else { 1544 pr_err("No handler for opcode 0x%x.\n", opc); 1545 __kfree_skb(skb); 1546 } 1547 return 0; 1548 nomem: 1549 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); 1550 return 1; 1551 } 1552 1553 static int t4_uld_state_change(void *handle, enum cxgb4_state state) 1554 { 1555 struct cxgbi_device *cdev = handle; 1556 1557 switch (state) { 1558 case CXGB4_STATE_UP: 1559 pr_info("cdev 0x%p, UP.\n", cdev); 1560 /* re-initialize */ 1561 break; 1562 case CXGB4_STATE_START_RECOVERY: 1563 pr_info("cdev 0x%p, RECOVERY.\n", cdev); 1564 /* close all connections */ 1565 break; 1566 case CXGB4_STATE_DOWN: 1567 pr_info("cdev 0x%p, DOWN.\n", cdev); 1568 break; 1569 case CXGB4_STATE_DETACH: 1570 pr_info("cdev 0x%p, DETACH.\n", cdev); 1571 break; 1572 default: 1573 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); 1574 break; 1575 } 1576 return 0; 1577 } 1578 1579 static int __init cxgb4i_init_module(void) 1580 { 1581 int rc; 1582 1583 printk(KERN_INFO "%s", version); 1584 1585 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1586 if (rc < 0) 1587 return rc; 1588 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); 1589 return 0; 1590 } 1591 1592 static void __exit cxgb4i_exit_module(void) 1593 { 1594 cxgb4_unregister_uld(CXGB4_ULD_ISCSI); 1595 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); 1596 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); 1597 } 1598 1599 module_init(cxgb4i_init_module); 1600 module_exit(cxgb4i_exit_module); 1601