1 /* 2 * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management 3 * 4 * Copyright (C) 2003-2015 Chelsio Communications. All rights reserved. 5 * 6 * This program is distributed in the hope that it will be useful, but WITHOUT 7 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 8 * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this 9 * release for licensing terms and conditions. 10 * 11 * Written by: Dimitris Michailidis (dm@chelsio.com) 12 * Karen Xie (kxie@chelsio.com) 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 16 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 #include <scsi/scsi_host.h> 20 21 #include "common.h" 22 #include "t3_cpl.h" 23 #include "t3cdev.h" 24 #include "cxgb3_defs.h" 25 #include "cxgb3_ctl_defs.h" 26 #include "cxgb3_offload.h" 27 #include "firmware_exports.h" 28 #include "cxgb3i.h" 29 30 static unsigned int dbg_level; 31 #include "../libcxgbi.h" 32 33 #define DRV_MODULE_NAME "cxgb3i" 34 #define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver" 35 #define DRV_MODULE_VERSION "2.0.1-ko" 36 #define DRV_MODULE_RELDATE "Apr. 2015" 37 38 static char version[] = 39 DRV_MODULE_DESC " " DRV_MODULE_NAME 40 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 41 42 MODULE_AUTHOR("Chelsio Communications, Inc."); 43 MODULE_DESCRIPTION(DRV_MODULE_DESC); 44 MODULE_VERSION(DRV_MODULE_VERSION); 45 MODULE_LICENSE("GPL"); 46 47 module_param(dbg_level, uint, 0644); 48 MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); 49 50 static int cxgb3i_rcv_win = 256 * 1024; 51 module_param(cxgb3i_rcv_win, int, 0644); 52 MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); 53 54 static int cxgb3i_snd_win = 128 * 1024; 55 module_param(cxgb3i_snd_win, int, 0644); 56 MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); 57 58 static int cxgb3i_rx_credit_thres = 10 * 1024; 59 module_param(cxgb3i_rx_credit_thres, int, 0644); 60 MODULE_PARM_DESC(cxgb3i_rx_credit_thres, 61 "RX credits return threshold in bytes (default=10KB)"); 62 63 static unsigned int cxgb3i_max_connect = 8 * 1024; 64 module_param(cxgb3i_max_connect, uint, 0644); 65 MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); 66 67 static unsigned int cxgb3i_sport_base = 20000; 68 module_param(cxgb3i_sport_base, uint, 0644); 69 MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); 70 71 static void cxgb3i_dev_open(struct t3cdev *); 72 static void cxgb3i_dev_close(struct t3cdev *); 73 static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); 74 75 static struct cxgb3_client t3_client = { 76 .name = DRV_MODULE_NAME, 77 .handlers = cxgb3i_cpl_handlers, 78 .add = cxgb3i_dev_open, 79 .remove = cxgb3i_dev_close, 80 .event_handler = cxgb3i_dev_event_handler, 81 }; 82 83 static const struct scsi_host_template cxgb3i_host_template = { 84 .module = THIS_MODULE, 85 .name = DRV_MODULE_NAME, 86 .proc_name = DRV_MODULE_NAME, 87 .can_queue = CXGB3I_SCSI_HOST_QDEPTH, 88 .queuecommand = iscsi_queuecommand, 89 .change_queue_depth = scsi_change_queue_depth, 90 .sg_tablesize = SG_ALL, 91 .max_sectors = 0xFFFF, 92 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 93 .eh_timed_out = iscsi_eh_cmd_timed_out, 94 .eh_abort_handler = iscsi_eh_abort, 95 .eh_device_reset_handler = iscsi_eh_device_reset, 96 .eh_target_reset_handler = iscsi_eh_recover_target, 97 .target_alloc = iscsi_target_alloc, 98 .dma_boundary = PAGE_SIZE - 1, 99 .this_id = -1, 100 .track_queue_depth = 1, 101 .cmd_size = sizeof(struct iscsi_cmd), 102 }; 103 104 static struct iscsi_transport cxgb3i_iscsi_transport = { 105 .owner = THIS_MODULE, 106 .name = DRV_MODULE_NAME, 107 /* owner and name should be set already */ 108 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST 109 | CAP_DATADGST | CAP_DIGEST_OFFLOAD | 110 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 111 .attr_is_visible = cxgbi_attr_is_visible, 112 .get_host_param = cxgbi_get_host_param, 113 .set_host_param = cxgbi_set_host_param, 114 /* session management */ 115 .create_session = cxgbi_create_session, 116 .destroy_session = cxgbi_destroy_session, 117 .get_session_param = iscsi_session_get_param, 118 /* connection management */ 119 .create_conn = cxgbi_create_conn, 120 .bind_conn = cxgbi_bind_conn, 121 .unbind_conn = iscsi_conn_unbind, 122 .destroy_conn = iscsi_tcp_conn_teardown, 123 .start_conn = iscsi_conn_start, 124 .stop_conn = iscsi_conn_stop, 125 .get_conn_param = iscsi_conn_get_param, 126 .set_param = cxgbi_set_conn_param, 127 .get_stats = cxgbi_get_conn_stats, 128 /* pdu xmit req from user space */ 129 .send_pdu = iscsi_conn_send_pdu, 130 /* task */ 131 .init_task = iscsi_tcp_task_init, 132 .xmit_task = iscsi_tcp_task_xmit, 133 .cleanup_task = cxgbi_cleanup_task, 134 /* pdu */ 135 .alloc_pdu = cxgbi_conn_alloc_pdu, 136 .init_pdu = cxgbi_conn_init_pdu, 137 .xmit_pdu = cxgbi_conn_xmit_pdu, 138 .parse_pdu_itt = cxgbi_parse_pdu_itt, 139 /* TCP connect/disconnect */ 140 .get_ep_param = cxgbi_get_ep_param, 141 .ep_connect = cxgbi_ep_connect, 142 .ep_poll = cxgbi_ep_poll, 143 .ep_disconnect = cxgbi_ep_disconnect, 144 /* Error recovery timeout call */ 145 .session_recovery_timedout = iscsi_session_recovery_timedout, 146 }; 147 148 static struct scsi_transport_template *cxgb3i_stt; 149 150 /* 151 * CPL (Chelsio Protocol Language) defines a message passing interface between 152 * the host driver and Chelsio asic. 153 * The section below implments CPLs that related to iscsi tcp connection 154 * open/close/abort and data send/receive. 155 */ 156 157 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); 158 159 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 160 const struct l2t_entry *e) 161 { 162 unsigned int wscale = cxgbi_sock_compute_wscale(csk->rcv_win); 163 struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; 164 165 skb->priority = CPL_PRIORITY_SETUP; 166 167 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 168 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); 169 req->local_port = csk->saddr.sin_port; 170 req->peer_port = csk->daddr.sin_port; 171 req->local_ip = csk->saddr.sin_addr.s_addr; 172 req->peer_ip = csk->daddr.sin_addr.s_addr; 173 174 req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | 175 V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | 176 V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); 177 req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | 178 V_RCV_BUFSIZ(csk->rcv_win >> 10)); 179 180 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 181 "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", 182 csk, csk->state, csk->flags, csk->atid, 183 &req->local_ip, ntohs(req->local_port), 184 &req->peer_ip, ntohs(req->peer_port), 185 csk->mss_idx, e->idx, e->smt_idx); 186 187 l2t_send(csk->cdev->lldev, skb, csk->l2t); 188 } 189 190 static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) 191 { 192 cxgbi_sock_act_open_req_arp_failure(NULL, skb); 193 } 194 195 /* 196 * CPL connection close request: host -> 197 * 198 * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to 199 * the write queue (i.e., after any unsent txt data). 200 */ 201 static void send_close_req(struct cxgbi_sock *csk) 202 { 203 struct sk_buff *skb = csk->cpl_close; 204 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 205 unsigned int tid = csk->tid; 206 207 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 208 "csk 0x%p,%u,0x%lx,%u.\n", 209 csk, csk->state, csk->flags, csk->tid); 210 211 csk->cpl_close = NULL; 212 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); 213 req->wr.wr_lo = htonl(V_WR_TID(tid)); 214 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 215 req->rsvd = htonl(csk->write_seq); 216 217 cxgbi_sock_skb_entail(csk, skb); 218 if (csk->state >= CTP_ESTABLISHED) 219 push_tx_frames(csk, 1); 220 } 221 222 /* 223 * CPL connection abort request: host -> 224 * 225 * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs 226 * for the same connection and also that we do not try to send a message 227 * after the connection has closed. 228 */ 229 static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) 230 { 231 struct cpl_abort_req *req = cplhdr(skb); 232 233 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 234 "t3dev 0x%p, tid %u, skb 0x%p.\n", 235 tdev, GET_TID(req), skb); 236 req->cmd = CPL_ABORT_NO_RST; 237 cxgb3_ofld_send(tdev, skb); 238 } 239 240 static void send_abort_req(struct cxgbi_sock *csk) 241 { 242 struct sk_buff *skb = csk->cpl_abort_req; 243 struct cpl_abort_req *req; 244 245 if (unlikely(csk->state == CTP_ABORTING || !skb)) 246 return; 247 cxgbi_sock_set_state(csk, CTP_ABORTING); 248 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 249 /* Purge the send queue so we don't send anything after an abort. */ 250 cxgbi_sock_purge_write_queue(csk); 251 252 csk->cpl_abort_req = NULL; 253 req = (struct cpl_abort_req *)skb->head; 254 skb->priority = CPL_PRIORITY_DATA; 255 set_arp_failure_handler(skb, abort_arp_failure); 256 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); 257 req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); 258 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 259 req->rsvd0 = htonl(csk->snd_nxt); 260 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 261 req->cmd = CPL_ABORT_SEND_RST; 262 263 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 264 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 265 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 266 req->rsvd1); 267 268 l2t_send(csk->cdev->lldev, skb, csk->l2t); 269 } 270 271 /* 272 * CPL connection abort reply: host -> 273 * 274 * Send an ABORT_RPL message in response of the ABORT_REQ received. 275 */ 276 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 277 { 278 struct sk_buff *skb = csk->cpl_abort_rpl; 279 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 280 281 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 282 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 283 csk, csk->state, csk->flags, csk->tid, rst_status); 284 285 csk->cpl_abort_rpl = NULL; 286 skb->priority = CPL_PRIORITY_DATA; 287 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); 288 rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); 289 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 290 rpl->cmd = rst_status; 291 cxgb3_ofld_send(csk->cdev->lldev, skb); 292 } 293 294 /* 295 * CPL connection rx data ack: host -> 296 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 297 * credits sent. 298 */ 299 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 300 { 301 struct sk_buff *skb; 302 struct cpl_rx_data_ack *req; 303 u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); 304 305 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 306 "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n", 307 csk, csk->state, csk->flags, csk->tid, credits, dack); 308 309 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 310 if (!skb) { 311 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 312 return 0; 313 } 314 req = (struct cpl_rx_data_ack *)skb->head; 315 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 316 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); 317 req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | 318 V_RX_CREDITS(credits)); 319 skb->priority = CPL_PRIORITY_ACK; 320 cxgb3_ofld_send(csk->cdev->lldev, skb); 321 return credits; 322 } 323 324 /* 325 * CPL connection tx data: host -> 326 * 327 * Send iscsi PDU via TX_DATA CPL message. Returns the number of 328 * credits sent. 329 * Each TX_DATA consumes work request credit (wrs), so we need to keep track of 330 * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). 331 */ 332 333 static unsigned int wrlen __read_mostly; 334 static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; 335 336 static void init_wr_tab(unsigned int wr_len) 337 { 338 int i; 339 340 if (skb_wrs[1]) /* already initialized */ 341 return; 342 for (i = 1; i < SKB_WR_LIST_SIZE; i++) { 343 int sgl_len = (3 * i) / 2 + (i & 1); 344 345 sgl_len += 3; 346 skb_wrs[i] = (sgl_len <= wr_len 347 ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); 348 } 349 wrlen = wr_len * 8; 350 } 351 352 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 353 int len, int req_completion) 354 { 355 struct tx_data_wr *req; 356 struct l2t_entry *l2t = csk->l2t; 357 358 skb_reset_transport_header(skb); 359 req = __skb_push(skb, sizeof(*req)); 360 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | 361 (req_completion ? F_WR_COMPL : 0)); 362 req->wr_lo = htonl(V_WR_TID(csk->tid)); 363 /* len includes the length of any HW ULP additions */ 364 req->len = htonl(len); 365 /* V_TX_ULP_SUBMODE sets both the mode and submode */ 366 req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_tx_ulp_mode(skb)) | 367 V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); 368 req->sndseq = htonl(csk->snd_nxt); 369 req->param = htonl(V_TX_PORT(l2t->smt_idx)); 370 371 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 372 req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | 373 V_TX_CPU_IDX(csk->rss_qid)); 374 /* sendbuffer is in units of 32KB. */ 375 req->param |= htonl(V_TX_SNDBUF(csk->snd_win >> 15)); 376 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 377 } 378 } 379 380 /* 381 * push_tx_frames -- start transmit 382 * 383 * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a 384 * connection's send queue and sends them on to T3. Must be called with the 385 * connection's lock held. Returns the amount of send buffer space that was 386 * freed as a result of sending queued data to T3. 387 */ 388 389 static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) 390 { 391 kfree_skb(skb); 392 } 393 394 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) 395 { 396 int total_size = 0; 397 struct sk_buff *skb; 398 399 if (unlikely(csk->state < CTP_ESTABLISHED || 400 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { 401 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 402 "csk 0x%p,%u,0x%lx,%u, in closing state.\n", 403 csk, csk->state, csk->flags, csk->tid); 404 return 0; 405 } 406 407 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { 408 int len = skb->len; /* length before skb_push */ 409 int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); 410 int wrs_needed = skb_wrs[frags]; 411 412 if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) 413 wrs_needed = 1; 414 415 WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); 416 417 if (csk->wr_cred < wrs_needed) { 418 log_debug(1 << CXGBI_DBG_PDU_TX, 419 "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n", 420 csk, skb->len, skb->data_len, frags, 421 wrs_needed, csk->wr_cred); 422 break; 423 } 424 425 __skb_unlink(skb, &csk->write_queue); 426 skb->priority = CPL_PRIORITY_DATA; 427 skb->csum = wrs_needed; /* remember this until the WR_ACK */ 428 csk->wr_cred -= wrs_needed; 429 csk->wr_una_cred += wrs_needed; 430 cxgbi_sock_enqueue_wr(csk, skb); 431 432 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 433 "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, " 434 "left %u, unack %u.\n", 435 csk, skb->len, skb->data_len, frags, skb->csum, 436 csk->wr_cred, csk->wr_una_cred); 437 438 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { 439 if ((req_completion && 440 csk->wr_una_cred == wrs_needed) || 441 csk->wr_una_cred >= csk->wr_max_cred / 2) { 442 req_completion = 1; 443 csk->wr_una_cred = 0; 444 } 445 len += cxgbi_ulp_extra_len(cxgbi_skcb_tx_ulp_mode(skb)); 446 make_tx_data_wr(csk, skb, len, req_completion); 447 csk->snd_nxt += len; 448 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); 449 } 450 total_size += skb->truesize; 451 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, 452 "csk 0x%p, tid 0x%x, send skb 0x%p.\n", 453 csk, csk->tid, skb); 454 set_arp_failure_handler(skb, arp_failure_skb_discard); 455 l2t_send(csk->cdev->lldev, skb, csk->l2t); 456 } 457 return total_size; 458 } 459 460 /* 461 * Process a CPL_ACT_ESTABLISH message: -> host 462 * Updates connection state from an active establish CPL message. Runs with 463 * the connection lock held. 464 */ 465 466 static inline void free_atid(struct cxgbi_sock *csk) 467 { 468 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { 469 cxgb3_free_atid(csk->cdev->lldev, csk->atid); 470 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); 471 cxgbi_sock_put(csk); 472 } 473 } 474 475 static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 476 { 477 struct cxgbi_sock *csk = ctx; 478 struct cpl_act_establish *req = cplhdr(skb); 479 unsigned int tid = GET_TID(req); 480 unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); 481 u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ 482 483 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 484 "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", 485 atid, atid, csk, csk->state, csk->flags, rcv_isn); 486 487 cxgbi_sock_get(csk); 488 cxgbi_sock_set_flag(csk, CTPF_HAS_TID); 489 csk->tid = tid; 490 cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid); 491 492 free_atid(csk); 493 494 csk->rss_qid = G_QNUM(ntohs(skb->csum)); 495 496 spin_lock_bh(&csk->lock); 497 if (csk->retry_timer.function) { 498 del_timer(&csk->retry_timer); 499 csk->retry_timer.function = NULL; 500 } 501 502 if (unlikely(csk->state != CTP_ACTIVE_OPEN)) 503 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", 504 csk, csk->state, csk->flags, csk->tid); 505 506 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; 507 if (csk->rcv_win > (M_RCV_BUFSIZ << 10)) 508 csk->rcv_wup -= csk->rcv_win - (M_RCV_BUFSIZ << 10); 509 510 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); 511 512 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) 513 /* upper layer has requested closing */ 514 send_abort_req(csk); 515 else { 516 if (skb_queue_len(&csk->write_queue)) 517 push_tx_frames(csk, 1); 518 cxgbi_conn_tx_open(csk); 519 } 520 521 spin_unlock_bh(&csk->lock); 522 __kfree_skb(skb); 523 return 0; 524 } 525 526 /* 527 * Process a CPL_ACT_OPEN_RPL message: -> host 528 * Handle active open failures. 529 */ 530 static int act_open_rpl_status_to_errno(int status) 531 { 532 switch (status) { 533 case CPL_ERR_CONN_RESET: 534 return -ECONNREFUSED; 535 case CPL_ERR_ARP_MISS: 536 return -EHOSTUNREACH; 537 case CPL_ERR_CONN_TIMEDOUT: 538 return -ETIMEDOUT; 539 case CPL_ERR_TCAM_FULL: 540 return -ENOMEM; 541 case CPL_ERR_CONN_EXIST: 542 return -EADDRINUSE; 543 default: 544 return -EIO; 545 } 546 } 547 548 static void act_open_retry_timer(struct timer_list *t) 549 { 550 struct cxgbi_sock *csk = from_timer(csk, t, retry_timer); 551 struct sk_buff *skb; 552 553 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 554 "csk 0x%p,%u,0x%lx,%u.\n", 555 csk, csk->state, csk->flags, csk->tid); 556 557 cxgbi_sock_get(csk); 558 spin_lock_bh(&csk->lock); 559 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); 560 if (!skb) 561 cxgbi_sock_fail_act_open(csk, -ENOMEM); 562 else { 563 skb->sk = (struct sock *)csk; 564 set_arp_failure_handler(skb, act_open_arp_failure); 565 send_act_open_req(csk, skb, csk->l2t); 566 } 567 spin_unlock_bh(&csk->lock); 568 cxgbi_sock_put(csk); 569 } 570 571 static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 572 { 573 struct cxgbi_sock *csk = ctx; 574 struct cpl_act_open_rpl *rpl = cplhdr(skb); 575 576 pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n", 577 csk, csk->state, csk->flags, csk->atid, rpl->status, 578 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), 579 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); 580 581 if (rpl->status != CPL_ERR_TCAM_FULL && 582 rpl->status != CPL_ERR_CONN_EXIST && 583 rpl->status != CPL_ERR_ARP_MISS) 584 cxgb3_queue_tid_release(tdev, GET_TID(rpl)); 585 586 cxgbi_sock_get(csk); 587 spin_lock_bh(&csk->lock); 588 if (rpl->status == CPL_ERR_CONN_EXIST && 589 csk->retry_timer.function != act_open_retry_timer) { 590 csk->retry_timer.function = act_open_retry_timer; 591 mod_timer(&csk->retry_timer, jiffies + HZ / 2); 592 } else 593 cxgbi_sock_fail_act_open(csk, 594 act_open_rpl_status_to_errno(rpl->status)); 595 596 spin_unlock_bh(&csk->lock); 597 cxgbi_sock_put(csk); 598 __kfree_skb(skb); 599 return 0; 600 } 601 602 /* 603 * Process PEER_CLOSE CPL messages: -> host 604 * Handle peer FIN. 605 */ 606 static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) 607 { 608 struct cxgbi_sock *csk = ctx; 609 610 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 611 "csk 0x%p,%u,0x%lx,%u.\n", 612 csk, csk->state, csk->flags, csk->tid); 613 614 cxgbi_sock_rcv_peer_close(csk); 615 __kfree_skb(skb); 616 return 0; 617 } 618 619 /* 620 * Process CLOSE_CONN_RPL CPL message: -> host 621 * Process a peer ACK to our FIN. 622 */ 623 static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, 624 void *ctx) 625 { 626 struct cxgbi_sock *csk = ctx; 627 struct cpl_close_con_rpl *rpl = cplhdr(skb); 628 629 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 630 "csk 0x%p,%u,0x%lx,%u, snxt %u.\n", 631 csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt)); 632 633 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); 634 __kfree_skb(skb); 635 return 0; 636 } 637 638 /* 639 * Process ABORT_REQ_RSS CPL message: -> host 640 * Process abort requests. If we are waiting for an ABORT_RPL we ignore this 641 * request except that we need to reply to it. 642 */ 643 644 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, 645 int *need_rst) 646 { 647 switch (abort_reason) { 648 case CPL_ERR_BAD_SYN: 649 case CPL_ERR_CONN_RESET: 650 return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET; 651 case CPL_ERR_XMIT_TIMEDOUT: 652 case CPL_ERR_PERSIST_TIMEDOUT: 653 case CPL_ERR_FINWAIT2_TIMEDOUT: 654 case CPL_ERR_KEEPALIVE_TIMEDOUT: 655 return -ETIMEDOUT; 656 default: 657 return -EIO; 658 } 659 } 660 661 static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) 662 { 663 const struct cpl_abort_req_rss *req = cplhdr(skb); 664 struct cxgbi_sock *csk = ctx; 665 int rst_status = CPL_ABORT_NO_RST; 666 667 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 668 "csk 0x%p,%u,0x%lx,%u.\n", 669 csk, csk->state, csk->flags, csk->tid); 670 671 if (req->status == CPL_ERR_RTX_NEG_ADVICE || 672 req->status == CPL_ERR_PERSIST_NEG_ADVICE) { 673 goto done; 674 } 675 676 cxgbi_sock_get(csk); 677 spin_lock_bh(&csk->lock); 678 679 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { 680 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); 681 cxgbi_sock_set_state(csk, CTP_ABORTING); 682 goto out; 683 } 684 685 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); 686 send_abort_rpl(csk, rst_status); 687 688 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 689 csk->err = abort_status_to_errno(csk, req->status, &rst_status); 690 cxgbi_sock_closed(csk); 691 } 692 693 out: 694 spin_unlock_bh(&csk->lock); 695 cxgbi_sock_put(csk); 696 done: 697 __kfree_skb(skb); 698 return 0; 699 } 700 701 /* 702 * Process ABORT_RPL_RSS CPL message: -> host 703 * Process abort replies. We only process these messages if we anticipate 704 * them as the coordination between SW and HW in this area is somewhat lacking 705 * and sometimes we get ABORT_RPLs after we are done with the connection that 706 * originated the ABORT_REQ. 707 */ 708 static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) 709 { 710 struct cpl_abort_rpl_rss *rpl = cplhdr(skb); 711 struct cxgbi_sock *csk = ctx; 712 713 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 714 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", 715 rpl->status, csk, csk ? csk->state : 0, 716 csk ? csk->flags : 0UL); 717 /* 718 * Ignore replies to post-close aborts indicating that the abort was 719 * requested too late. These connections are terminated when we get 720 * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss 721 * arrives the TID is either no longer used or it has been recycled. 722 */ 723 if (rpl->status == CPL_ERR_ABORT_FAILED) 724 goto rel_skb; 725 /* 726 * Sometimes we've already closed the connection, e.g., a post-close 727 * abort races with ABORT_REQ_RSS, the latter frees the connection 728 * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, 729 * but FW turns the ABORT_REQ into a regular one and so we get 730 * ABORT_RPL_RSS with status 0 and no connection. 731 */ 732 if (csk) 733 cxgbi_sock_rcv_abort_rpl(csk); 734 rel_skb: 735 __kfree_skb(skb); 736 return 0; 737 } 738 739 /* 740 * Process RX_ISCSI_HDR CPL message: -> host 741 * Handle received PDUs, the payload could be DDP'ed. If not, the payload 742 * follow after the bhs. 743 */ 744 static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) 745 { 746 struct cxgbi_sock *csk = ctx; 747 struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); 748 struct cpl_iscsi_hdr_norss data_cpl; 749 struct cpl_rx_data_ddp_norss ddp_cpl; 750 unsigned int hdr_len, data_len, status; 751 unsigned int len; 752 int err; 753 754 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 755 "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n", 756 csk, csk->state, csk->flags, csk->tid, skb, skb->len); 757 758 spin_lock_bh(&csk->lock); 759 760 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { 761 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 762 "csk 0x%p,%u,0x%lx,%u, bad state.\n", 763 csk, csk->state, csk->flags, csk->tid); 764 if (csk->state != CTP_ABORTING) 765 goto abort_conn; 766 else 767 goto discard; 768 } 769 770 cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq); 771 cxgbi_skcb_flags(skb) = 0; 772 773 skb_reset_transport_header(skb); 774 __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); 775 776 len = hdr_len = ntohs(hdr_cpl->len); 777 /* msg coalesce is off or not enough data received */ 778 if (skb->len <= hdr_len) { 779 pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n", 780 csk->cdev->ports[csk->port_id]->name, csk->tid, 781 skb->len, hdr_len); 782 goto abort_conn; 783 } 784 cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED); 785 786 err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, 787 sizeof(ddp_cpl)); 788 if (err < 0) { 789 pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n", 790 csk->cdev->ports[csk->port_id]->name, csk->tid, 791 skb->len, sizeof(ddp_cpl), err); 792 goto abort_conn; 793 } 794 795 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); 796 cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len); 797 cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); 798 status = ntohl(ddp_cpl.ddp_status); 799 800 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 801 "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n", 802 csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status); 803 804 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) 805 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); 806 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) 807 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); 808 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) 809 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); 810 811 if (skb->len > (hdr_len + sizeof(ddp_cpl))) { 812 err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); 813 if (err < 0) { 814 pr_err("%s: tid %u, cp %zu/%u failed %d.\n", 815 csk->cdev->ports[csk->port_id]->name, 816 csk->tid, sizeof(data_cpl), skb->len, err); 817 goto abort_conn; 818 } 819 data_len = ntohs(data_cpl.len); 820 log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX, 821 "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n", 822 skb, data_len, cxgbi_skcb_rx_pdulen(skb), status); 823 len += sizeof(data_cpl) + data_len; 824 } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) 825 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); 826 827 csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb); 828 __pskb_trim(skb, len); 829 __skb_queue_tail(&csk->receive_queue, skb); 830 cxgbi_conn_pdu_ready(csk); 831 832 spin_unlock_bh(&csk->lock); 833 return 0; 834 835 abort_conn: 836 send_abort_req(csk); 837 discard: 838 spin_unlock_bh(&csk->lock); 839 __kfree_skb(skb); 840 return 0; 841 } 842 843 /* 844 * Process TX_DATA_ACK CPL messages: -> host 845 * Process an acknowledgment of WR completion. Advance snd_una and send the 846 * next batch of work requests from the write queue. 847 */ 848 static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) 849 { 850 struct cxgbi_sock *csk = ctx; 851 struct cpl_wr_ack *hdr = cplhdr(skb); 852 853 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 854 "csk 0x%p,%u,0x%lx,%u, cr %u.\n", 855 csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits)); 856 857 cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1); 858 __kfree_skb(skb); 859 return 0; 860 } 861 862 /* 863 * for each connection, pre-allocate skbs needed for close/abort requests. So 864 * that we can service the request right away. 865 */ 866 static int alloc_cpls(struct cxgbi_sock *csk) 867 { 868 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0, 869 GFP_KERNEL); 870 if (!csk->cpl_close) 871 return -ENOMEM; 872 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0, 873 GFP_KERNEL); 874 if (!csk->cpl_abort_req) 875 goto free_cpl_skbs; 876 877 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0, 878 GFP_KERNEL); 879 if (!csk->cpl_abort_rpl) 880 goto free_cpl_skbs; 881 882 return 0; 883 884 free_cpl_skbs: 885 cxgbi_sock_free_cpl_skbs(csk); 886 return -ENOMEM; 887 } 888 889 static void l2t_put(struct cxgbi_sock *csk) 890 { 891 struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; 892 893 if (csk->l2t) { 894 l2t_release(t3dev, csk->l2t); 895 csk->l2t = NULL; 896 cxgbi_sock_put(csk); 897 } 898 } 899 900 /* 901 * release_offload_resources - release offload resource 902 * Release resources held by an offload connection (TID, L2T entry, etc.) 903 */ 904 static void release_offload_resources(struct cxgbi_sock *csk) 905 { 906 struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; 907 908 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 909 "csk 0x%p,%u,0x%lx,%u.\n", 910 csk, csk->state, csk->flags, csk->tid); 911 912 csk->rss_qid = 0; 913 cxgbi_sock_free_cpl_skbs(csk); 914 915 if (csk->wr_cred != csk->wr_max_cred) { 916 cxgbi_sock_purge_wr_queue(csk); 917 cxgbi_sock_reset_wr_list(csk); 918 } 919 l2t_put(csk); 920 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 921 free_atid(csk); 922 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 923 cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); 924 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 925 cxgbi_sock_put(csk); 926 } 927 csk->dst = NULL; 928 csk->cdev = NULL; 929 } 930 931 static void update_address(struct cxgbi_hba *chba) 932 { 933 if (chba->ipv4addr) { 934 if (chba->vdev && 935 chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) { 936 cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr); 937 cxgb3i_set_private_ipv4addr(chba->ndev, 0); 938 pr_info("%s set %pI4.\n", 939 chba->vdev->name, &chba->ipv4addr); 940 } else if (chba->ipv4addr != 941 cxgb3i_get_private_ipv4addr(chba->ndev)) { 942 cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr); 943 pr_info("%s set %pI4.\n", 944 chba->ndev->name, &chba->ipv4addr); 945 } 946 } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) { 947 if (chba->vdev) 948 cxgb3i_set_private_ipv4addr(chba->vdev, 0); 949 cxgb3i_set_private_ipv4addr(chba->ndev, 0); 950 } 951 } 952 953 static int init_act_open(struct cxgbi_sock *csk) 954 { 955 struct dst_entry *dst = csk->dst; 956 struct cxgbi_device *cdev = csk->cdev; 957 struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; 958 struct net_device *ndev = cdev->ports[csk->port_id]; 959 struct cxgbi_hba *chba = cdev->hbas[csk->port_id]; 960 struct sk_buff *skb = NULL; 961 int ret; 962 963 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 964 "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags); 965 966 update_address(chba); 967 if (chba->ipv4addr) 968 csk->saddr.sin_addr.s_addr = chba->ipv4addr; 969 970 csk->rss_qid = 0; 971 csk->l2t = t3_l2t_get(t3dev, dst, ndev, 972 &csk->daddr.sin_addr.s_addr); 973 if (!csk->l2t) { 974 pr_err("NO l2t available.\n"); 975 return -EINVAL; 976 } 977 cxgbi_sock_get(csk); 978 979 csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); 980 if (csk->atid < 0) { 981 pr_err("NO atid available.\n"); 982 ret = -EINVAL; 983 goto put_sock; 984 } 985 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 986 cxgbi_sock_get(csk); 987 988 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); 989 if (!skb) { 990 ret = -ENOMEM; 991 goto free_atid; 992 } 993 skb->sk = (struct sock *)csk; 994 set_arp_failure_handler(skb, act_open_arp_failure); 995 csk->snd_win = cxgb3i_snd_win; 996 csk->rcv_win = cxgb3i_rcv_win; 997 998 csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; 999 csk->wr_una_cred = 0; 1000 csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); 1001 cxgbi_sock_reset_wr_list(csk); 1002 csk->err = 0; 1003 1004 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 1005 "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n", 1006 csk, csk->state, csk->flags, 1007 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), 1008 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); 1009 1010 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1011 send_act_open_req(csk, skb, csk->l2t); 1012 return 0; 1013 1014 free_atid: 1015 cxgb3_free_atid(t3dev, csk->atid); 1016 put_sock: 1017 cxgbi_sock_put(csk); 1018 l2t_release(t3dev, csk->l2t); 1019 csk->l2t = NULL; 1020 1021 return ret; 1022 } 1023 1024 cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { 1025 [CPL_ACT_ESTABLISH] = do_act_establish, 1026 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1027 [CPL_PEER_CLOSE] = do_peer_close, 1028 [CPL_ABORT_REQ_RSS] = do_abort_req, 1029 [CPL_ABORT_RPL_RSS] = do_abort_rpl, 1030 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1031 [CPL_TX_DMA_ACK] = do_wr_ack, 1032 [CPL_ISCSI_HDR] = do_iscsi_hdr, 1033 }; 1034 1035 /** 1036 * cxgb3i_ofld_init - allocate and initialize resources for each adapter found 1037 * @cdev: cxgbi adapter 1038 */ 1039 static int cxgb3i_ofld_init(struct cxgbi_device *cdev) 1040 { 1041 struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; 1042 struct adap_ports port; 1043 struct ofld_page_info rx_page_info; 1044 unsigned int wr_len; 1045 int rc; 1046 1047 if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || 1048 t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || 1049 t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { 1050 pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev); 1051 return -EINVAL; 1052 } 1053 1054 if (cxgb3i_max_connect > CXGBI_MAX_CONN) 1055 cxgb3i_max_connect = CXGBI_MAX_CONN; 1056 1057 rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, 1058 cxgb3i_max_connect); 1059 if (rc < 0) 1060 return rc; 1061 1062 init_wr_tab(wr_len); 1063 cdev->csk_release_offload_resources = release_offload_resources; 1064 cdev->csk_push_tx_frames = push_tx_frames; 1065 cdev->csk_send_abort_req = send_abort_req; 1066 cdev->csk_send_close_req = send_close_req; 1067 cdev->csk_send_rx_credits = send_rx_credits; 1068 cdev->csk_alloc_cpls = alloc_cpls; 1069 cdev->csk_init_act_open = init_act_open; 1070 1071 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1072 return 0; 1073 } 1074 1075 /* 1076 * functions to program the pagepod in h/w 1077 */ 1078 static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) 1079 { 1080 struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; 1081 1082 memset(req, 0, sizeof(*req)); 1083 1084 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); 1085 req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | 1086 V_ULPTX_CMD(ULP_MEM_WRITE)); 1087 req->len = htonl(V_ULP_MEMIO_DATA_LEN(IPPOD_SIZE >> 5) | 1088 V_ULPTX_NFLITS((IPPOD_SIZE >> 3) + 1)); 1089 } 1090 1091 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) 1092 { 1093 return ((struct t3cdev *)cdev->lldev)->ulp_iscsi; 1094 } 1095 1096 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, 1097 struct cxgbi_task_tag_info *ttinfo) 1098 { 1099 unsigned int idx = ttinfo->idx; 1100 unsigned int npods = ttinfo->npods; 1101 struct scatterlist *sg = ttinfo->sgl; 1102 struct cxgbi_pagepod *ppod; 1103 struct ulp_mem_io *req; 1104 unsigned int sg_off; 1105 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1106 int i; 1107 1108 for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) { 1109 struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + 1110 IPPOD_SIZE, 0, GFP_ATOMIC); 1111 1112 if (!skb) 1113 return -ENOMEM; 1114 ulp_mem_io_set_hdr(skb, pm_addr); 1115 req = (struct ulp_mem_io *)skb->head; 1116 ppod = (struct cxgbi_pagepod *)(req + 1); 1117 sg_off = i * PPOD_PAGES_MAX; 1118 cxgbi_ddp_set_one_ppod(ppod, ttinfo, &sg, 1119 &sg_off); 1120 skb->priority = CPL_PRIORITY_CONTROL; 1121 cxgb3_ofld_send(ppm->lldev, skb); 1122 } 1123 return 0; 1124 } 1125 1126 static void ddp_clear_map(struct cxgbi_device *cdev, struct cxgbi_ppm *ppm, 1127 struct cxgbi_task_tag_info *ttinfo) 1128 { 1129 unsigned int idx = ttinfo->idx; 1130 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; 1131 unsigned int npods = ttinfo->npods; 1132 int i; 1133 1134 log_debug(1 << CXGBI_DBG_DDP, 1135 "cdev 0x%p, clear idx %u, npods %u.\n", 1136 cdev, idx, npods); 1137 1138 for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) { 1139 struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + 1140 IPPOD_SIZE, 0, GFP_ATOMIC); 1141 1142 if (!skb) { 1143 pr_err("cdev 0x%p, clear ddp, %u,%d/%u, skb OOM.\n", 1144 cdev, idx, i, npods); 1145 continue; 1146 } 1147 ulp_mem_io_set_hdr(skb, pm_addr); 1148 skb->priority = CPL_PRIORITY_CONTROL; 1149 cxgb3_ofld_send(ppm->lldev, skb); 1150 } 1151 } 1152 1153 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, 1154 unsigned int tid, int pg_idx) 1155 { 1156 struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, 1157 GFP_KERNEL); 1158 struct cpl_set_tcb_field *req; 1159 u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; 1160 1161 log_debug(1 << CXGBI_DBG_DDP, 1162 "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx); 1163 if (!skb) 1164 return -ENOMEM; 1165 1166 /* set up ulp submode and page size */ 1167 req = (struct cpl_set_tcb_field *)skb->head; 1168 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1169 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1170 req->reply = V_NO_REPLY(1); 1171 req->cpu_idx = 0; 1172 req->word = htons(31); 1173 req->mask = cpu_to_be64(0xF0000000); 1174 req->val = cpu_to_be64(val << 28); 1175 skb->priority = CPL_PRIORITY_CONTROL; 1176 1177 cxgb3_ofld_send(csk->cdev->lldev, skb); 1178 return 0; 1179 } 1180 1181 /** 1182 * ddp_setup_conn_digest - setup conn. digest setting 1183 * @csk: cxgb tcp socket 1184 * @tid: connection id 1185 * @hcrc: header digest enabled 1186 * @dcrc: data digest enabled 1187 * set up the iscsi digest settings for a connection identified by tid 1188 */ 1189 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1190 int hcrc, int dcrc) 1191 { 1192 struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, 1193 GFP_KERNEL); 1194 struct cpl_set_tcb_field *req; 1195 u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); 1196 1197 log_debug(1 << CXGBI_DBG_DDP, 1198 "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc); 1199 if (!skb) 1200 return -ENOMEM; 1201 1202 /* set up ulp submode and page size */ 1203 req = (struct cpl_set_tcb_field *)skb->head; 1204 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1205 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1206 req->reply = V_NO_REPLY(1); 1207 req->cpu_idx = 0; 1208 req->word = htons(31); 1209 req->mask = cpu_to_be64(0x0F000000); 1210 req->val = cpu_to_be64(val << 24); 1211 skb->priority = CPL_PRIORITY_CONTROL; 1212 1213 cxgb3_ofld_send(csk->cdev->lldev, skb); 1214 return 0; 1215 } 1216 1217 /** 1218 * cxgb3i_ddp_init - initialize the cxgb3 adapter's ddp resource 1219 * @cdev: cxgb3i adapter 1220 * initialize the ddp pagepod manager for a given adapter 1221 */ 1222 static int cxgb3i_ddp_init(struct cxgbi_device *cdev) 1223 { 1224 struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; 1225 struct net_device *ndev = cdev->ports[0]; 1226 struct cxgbi_tag_format tformat; 1227 unsigned int ppmax, tagmask = 0; 1228 struct ulp_iscsi_info uinfo; 1229 int i, err; 1230 1231 err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); 1232 if (err < 0) { 1233 pr_err("%s, failed to get iscsi param %d.\n", 1234 ndev->name, err); 1235 return err; 1236 } 1237 if (uinfo.llimit >= uinfo.ulimit) { 1238 pr_warn("T3 %s, iscsi NOT enabled %u ~ %u!\n", 1239 ndev->name, uinfo.llimit, uinfo.ulimit); 1240 return -EACCES; 1241 } 1242 1243 ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; 1244 tagmask = cxgbi_tagmask_set(ppmax); 1245 1246 pr_info("T3 %s: 0x%x~0x%x, 0x%x, tagmask 0x%x -> 0x%x.\n", 1247 ndev->name, uinfo.llimit, uinfo.ulimit, ppmax, uinfo.tagmask, 1248 tagmask); 1249 1250 memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); 1251 for (i = 0; i < 4; i++) 1252 tformat.pgsz_order[i] = uinfo.pgsz_factor[i]; 1253 cxgbi_tagmask_check(tagmask, &tformat); 1254 1255 err = cxgbi_ddp_ppm_setup(&tdev->ulp_iscsi, cdev, &tformat, 1256 (uinfo.ulimit - uinfo.llimit + 1), 1257 uinfo.llimit, uinfo.llimit, 0, 0, 0); 1258 if (err) 1259 return err; 1260 1261 if (!(cdev->flags & CXGBI_FLAG_DDP_OFF)) { 1262 uinfo.tagmask = tagmask; 1263 uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); 1264 1265 err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); 1266 if (err < 0) { 1267 pr_err("T3 %s fail to set iscsi param %d.\n", 1268 ndev->name, err); 1269 cdev->flags |= CXGBI_FLAG_DDP_OFF; 1270 } 1271 err = 0; 1272 } 1273 1274 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1275 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1276 cdev->csk_ddp_set_map = ddp_set_map; 1277 cdev->csk_ddp_clear_map = ddp_clear_map; 1278 cdev->cdev2ppm = cdev2ppm; 1279 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1280 uinfo.max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); 1281 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, 1282 uinfo.max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); 1283 1284 return 0; 1285 } 1286 1287 static void cxgb3i_dev_close(struct t3cdev *t3dev) 1288 { 1289 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); 1290 1291 if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { 1292 pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0); 1293 return; 1294 } 1295 1296 cxgbi_device_unregister(cdev); 1297 } 1298 1299 /** 1300 * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings 1301 * @t3dev: t3cdev adapter 1302 */ 1303 static void cxgb3i_dev_open(struct t3cdev *t3dev) 1304 { 1305 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); 1306 struct adapter *adapter = tdev2adap(t3dev); 1307 int i, err; 1308 1309 if (cdev) { 1310 pr_info("0x%p, updating.\n", cdev); 1311 return; 1312 } 1313 1314 cdev = cxgbi_device_register(0, adapter->params.nports); 1315 if (!cdev) { 1316 pr_warn("device 0x%p register failed.\n", t3dev); 1317 return; 1318 } 1319 1320 cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET; 1321 cdev->lldev = t3dev; 1322 cdev->pdev = adapter->pdev; 1323 cdev->ports = adapter->port; 1324 cdev->nports = adapter->params.nports; 1325 cdev->mtus = adapter->params.mtus; 1326 cdev->nmtus = NMTUS; 1327 cdev->rx_credit_thres = cxgb3i_rx_credit_thres; 1328 cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; 1329 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); 1330 cdev->itp = &cxgb3i_iscsi_transport; 1331 1332 err = cxgb3i_ddp_init(cdev); 1333 if (err) { 1334 pr_info("0x%p ddp init failed %d\n", cdev, err); 1335 goto err_out; 1336 } 1337 1338 err = cxgb3i_ofld_init(cdev); 1339 if (err) { 1340 pr_info("0x%p offload init failed\n", cdev); 1341 goto err_out; 1342 } 1343 1344 err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, 1345 &cxgb3i_host_template, cxgb3i_stt); 1346 if (err) 1347 goto err_out; 1348 1349 for (i = 0; i < cdev->nports; i++) 1350 cdev->hbas[i]->ipv4addr = 1351 cxgb3i_get_private_ipv4addr(cdev->ports[i]); 1352 1353 pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", 1354 cdev, cdev ? cdev->flags : 0, t3dev, err); 1355 return; 1356 1357 err_out: 1358 cxgbi_device_unregister(cdev); 1359 } 1360 1361 static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) 1362 { 1363 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); 1364 1365 log_debug(1 << CXGBI_DBG_TOE, 1366 "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", 1367 t3dev, cdev, event, port); 1368 if (!cdev) 1369 return; 1370 1371 switch (event) { 1372 case OFFLOAD_STATUS_DOWN: 1373 cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; 1374 break; 1375 case OFFLOAD_STATUS_UP: 1376 cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; 1377 break; 1378 } 1379 } 1380 1381 /** 1382 * cxgb3i_init_module - module init entry point 1383 * 1384 * initialize any driver wide global data structures and register itself 1385 * with the cxgb3 module 1386 */ 1387 static int __init cxgb3i_init_module(void) 1388 { 1389 int rc; 1390 1391 printk(KERN_INFO "%s", version); 1392 1393 rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt); 1394 if (rc < 0) 1395 return rc; 1396 1397 cxgb3_register_client(&t3_client); 1398 return 0; 1399 } 1400 1401 /** 1402 * cxgb3i_exit_module - module cleanup/exit entry point 1403 * 1404 * go through the driver hba list and for each hba, release any resource held. 1405 * and unregisters iscsi transport and the cxgb3 module 1406 */ 1407 static void __exit cxgb3i_exit_module(void) 1408 { 1409 cxgb3_unregister_client(&t3_client); 1410 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); 1411 cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt); 1412 } 1413 1414 module_init(cxgb3i_init_module); 1415 module_exit(cxgb3i_exit_module); 1416