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