1/* 2 * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management 3 * 4 * Copyright (C) 2003-2008 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 30static 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 "2.0.0" 36#define DRV_MODULE_RELDATE "Jun. 2010" 37 38static char version[] = 39 DRV_MODULE_DESC " " DRV_MODULE_NAME 40 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 41 42MODULE_AUTHOR("Chelsio Communications, Inc."); 43MODULE_DESCRIPTION(DRV_MODULE_DESC); 44MODULE_VERSION(DRV_MODULE_VERSION); 45MODULE_LICENSE("GPL"); 46 47module_param(dbg_level, uint, 0644); 48MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); 49 50static int cxgb3i_rcv_win = 256 * 1024; 51module_param(cxgb3i_rcv_win, int, 0644); 52MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); 53 54static int cxgb3i_snd_win = 128 * 1024; 55module_param(cxgb3i_snd_win, int, 0644); 56MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); 57 58static int cxgb3i_rx_credit_thres = 10 * 1024; 59module_param(cxgb3i_rx_credit_thres, int, 0644); 60MODULE_PARM_DESC(rx_credit_thres, 61 "RX credits return threshold in bytes (default=10KB)"); 62 63static unsigned int cxgb3i_max_connect = 8 * 1024; 64module_param(cxgb3i_max_connect, uint, 0644); 65MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); 66 67static unsigned int cxgb3i_sport_base = 20000; 68module_param(cxgb3i_sport_base, uint, 0644); 69MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); 70 71static void cxgb3i_dev_open(struct t3cdev *); 72static void cxgb3i_dev_close(struct t3cdev *); 73static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); 74 75static 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 83static 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 = iscsi_change_queue_depth, 90 .sg_tablesize = SG_ALL, 91 .max_sectors = 0xFFFF, 92 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, 93 .eh_abort_handler = iscsi_eh_abort, 94 .eh_device_reset_handler = iscsi_eh_device_reset, 95 .eh_target_reset_handler = iscsi_eh_recover_target, 96 .target_alloc = iscsi_target_alloc, 97 .use_clustering = DISABLE_CLUSTERING, 98 .this_id = -1, 99}; 100 101static struct iscsi_transport cxgb3i_iscsi_transport = { 102 .owner = THIS_MODULE, 103 .name = DRV_MODULE_NAME, 104 /* owner and name should be set already */ 105 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST 106 | CAP_DATADGST | CAP_DIGEST_OFFLOAD | 107 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, 108 .attr_is_visible = cxgbi_attr_is_visible, 109 .get_host_param = cxgbi_get_host_param, 110 .set_host_param = cxgbi_set_host_param, 111 /* session management */ 112 .create_session = cxgbi_create_session, 113 .destroy_session = cxgbi_destroy_session, 114 .get_session_param = iscsi_session_get_param, 115 /* connection management */ 116 .create_conn = cxgbi_create_conn, 117 .bind_conn = cxgbi_bind_conn, 118 .destroy_conn = iscsi_tcp_conn_teardown, 119 .start_conn = iscsi_conn_start, 120 .stop_conn = iscsi_conn_stop, 121 .get_conn_param = iscsi_conn_get_param, 122 .set_param = cxgbi_set_conn_param, 123 .get_stats = cxgbi_get_conn_stats, 124 /* pdu xmit req from user space */ 125 .send_pdu = iscsi_conn_send_pdu, 126 /* task */ 127 .init_task = iscsi_tcp_task_init, 128 .xmit_task = iscsi_tcp_task_xmit, 129 .cleanup_task = cxgbi_cleanup_task, 130 /* pdu */ 131 .alloc_pdu = cxgbi_conn_alloc_pdu, 132 .init_pdu = cxgbi_conn_init_pdu, 133 .xmit_pdu = cxgbi_conn_xmit_pdu, 134 .parse_pdu_itt = cxgbi_parse_pdu_itt, 135 /* TCP connect/disconnect */ 136 .get_ep_param = cxgbi_get_ep_param, 137 .ep_connect = cxgbi_ep_connect, 138 .ep_poll = cxgbi_ep_poll, 139 .ep_disconnect = cxgbi_ep_disconnect, 140 /* Error recovery timeout call */ 141 .session_recovery_timedout = iscsi_session_recovery_timedout, 142}; 143 144static struct scsi_transport_template *cxgb3i_stt; 145 146/* 147 * CPL (Chelsio Protocol Language) defines a message passing interface between 148 * the host driver and Chelsio asic. 149 * The section below implments CPLs that related to iscsi tcp connection 150 * open/close/abort and data send/receive. 151 */ 152 153static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); 154 155static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, 156 const struct l2t_entry *e) 157{ 158 unsigned int wscale = cxgbi_sock_compute_wscale(cxgb3i_rcv_win); 159 struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; 160 161 skb->priority = CPL_PRIORITY_SETUP; 162 163 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 164 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); 165 req->local_port = csk->saddr.sin_port; 166 req->peer_port = csk->daddr.sin_port; 167 req->local_ip = csk->saddr.sin_addr.s_addr; 168 req->peer_ip = csk->daddr.sin_addr.s_addr; 169 170 req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | 171 V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | 172 V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); 173 req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | 174 V_RCV_BUFSIZ(cxgb3i_rcv_win>>10)); 175 176 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 177 "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", 178 csk, csk->state, csk->flags, csk->atid, 179 &req->local_ip, ntohs(req->local_port), 180 &req->peer_ip, ntohs(req->peer_port), 181 csk->mss_idx, e->idx, e->smt_idx); 182 183 l2t_send(csk->cdev->lldev, skb, csk->l2t); 184} 185 186static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) 187{ 188 cxgbi_sock_act_open_req_arp_failure(NULL, skb); 189} 190 191/* 192 * CPL connection close request: host -> 193 * 194 * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to 195 * the write queue (i.e., after any unsent txt data). 196 */ 197static void send_close_req(struct cxgbi_sock *csk) 198{ 199 struct sk_buff *skb = csk->cpl_close; 200 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; 201 unsigned int tid = csk->tid; 202 203 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 204 "csk 0x%p,%u,0x%lx,%u.\n", 205 csk, csk->state, csk->flags, csk->tid); 206 207 csk->cpl_close = NULL; 208 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); 209 req->wr.wr_lo = htonl(V_WR_TID(tid)); 210 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 211 req->rsvd = htonl(csk->write_seq); 212 213 cxgbi_sock_skb_entail(csk, skb); 214 if (csk->state >= CTP_ESTABLISHED) 215 push_tx_frames(csk, 1); 216} 217 218/* 219 * CPL connection abort request: host -> 220 * 221 * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs 222 * for the same connection and also that we do not try to send a message 223 * after the connection has closed. 224 */ 225static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) 226{ 227 struct cpl_abort_req *req = cplhdr(skb); 228 229 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 230 "t3dev 0x%p, tid %u, skb 0x%p.\n", 231 tdev, GET_TID(req), skb); 232 req->cmd = CPL_ABORT_NO_RST; 233 cxgb3_ofld_send(tdev, skb); 234} 235 236static void send_abort_req(struct cxgbi_sock *csk) 237{ 238 struct sk_buff *skb = csk->cpl_abort_req; 239 struct cpl_abort_req *req; 240 241 if (unlikely(csk->state == CTP_ABORTING || !skb)) 242 return; 243 cxgbi_sock_set_state(csk, CTP_ABORTING); 244 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); 245 /* Purge the send queue so we don't send anything after an abort. */ 246 cxgbi_sock_purge_write_queue(csk); 247 248 csk->cpl_abort_req = NULL; 249 req = (struct cpl_abort_req *)skb->head; 250 skb->priority = CPL_PRIORITY_DATA; 251 set_arp_failure_handler(skb, abort_arp_failure); 252 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); 253 req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); 254 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); 255 req->rsvd0 = htonl(csk->snd_nxt); 256 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); 257 req->cmd = CPL_ABORT_SEND_RST; 258 259 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 260 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", 261 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, 262 req->rsvd1); 263 264 l2t_send(csk->cdev->lldev, skb, csk->l2t); 265} 266 267/* 268 * CPL connection abort reply: host -> 269 * 270 * Send an ABORT_RPL message in response of the ABORT_REQ received. 271 */ 272static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) 273{ 274 struct sk_buff *skb = csk->cpl_abort_rpl; 275 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; 276 277 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 278 "csk 0x%p,%u,0x%lx,%u, status %d.\n", 279 csk, csk->state, csk->flags, csk->tid, rst_status); 280 281 csk->cpl_abort_rpl = NULL; 282 skb->priority = CPL_PRIORITY_DATA; 283 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); 284 rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); 285 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); 286 rpl->cmd = rst_status; 287 cxgb3_ofld_send(csk->cdev->lldev, skb); 288} 289 290/* 291 * CPL connection rx data ack: host -> 292 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of 293 * credits sent. 294 */ 295static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) 296{ 297 struct sk_buff *skb; 298 struct cpl_rx_data_ack *req; 299 u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); 300 301 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, 302 "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n", 303 csk, csk->state, csk->flags, csk->tid, credits, dack); 304 305 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); 306 if (!skb) { 307 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); 308 return 0; 309 } 310 req = (struct cpl_rx_data_ack *)skb->head; 311 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 312 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); 313 req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | 314 V_RX_CREDITS(credits)); 315 skb->priority = CPL_PRIORITY_ACK; 316 cxgb3_ofld_send(csk->cdev->lldev, skb); 317 return credits; 318} 319 320/* 321 * CPL connection tx data: host -> 322 * 323 * Send iscsi PDU via TX_DATA CPL message. Returns the number of 324 * credits sent. 325 * Each TX_DATA consumes work request credit (wrs), so we need to keep track of 326 * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). 327 */ 328 329static unsigned int wrlen __read_mostly; 330static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; 331 332static void init_wr_tab(unsigned int wr_len) 333{ 334 int i; 335 336 if (skb_wrs[1]) /* already initialized */ 337 return; 338 for (i = 1; i < SKB_WR_LIST_SIZE; i++) { 339 int sgl_len = (3 * i) / 2 + (i & 1); 340 341 sgl_len += 3; 342 skb_wrs[i] = (sgl_len <= wr_len 343 ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); 344 } 345 wrlen = wr_len * 8; 346} 347 348static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, 349 int len, int req_completion) 350{ 351 struct tx_data_wr *req; 352 struct l2t_entry *l2t = csk->l2t; 353 354 skb_reset_transport_header(skb); 355 req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req)); 356 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | 357 (req_completion ? F_WR_COMPL : 0)); 358 req->wr_lo = htonl(V_WR_TID(csk->tid)); 359 /* len includes the length of any HW ULP additions */ 360 req->len = htonl(len); 361 /* V_TX_ULP_SUBMODE sets both the mode and submode */ 362 req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) | 363 V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); 364 req->sndseq = htonl(csk->snd_nxt); 365 req->param = htonl(V_TX_PORT(l2t->smt_idx)); 366 367 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { 368 req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | 369 V_TX_CPU_IDX(csk->rss_qid)); 370 /* sendbuffer is in units of 32KB. */ 371 req->param |= htonl(V_TX_SNDBUF(cxgb3i_snd_win >> 15)); 372 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); 373 } 374} 375 376/** 377 * push_tx_frames -- start transmit 378 * @c3cn: the offloaded connection 379 * @req_completion: request wr_ack or not 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 387static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) 388{ 389 kfree_skb(skb); 390} 391 392static 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_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 464static 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 473static 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 (cxgb3i_rcv_win > (M_RCV_BUFSIZ << 10)) 506 csk->rcv_wup -= cxgb3i_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 */ 528static 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 546static void act_open_retry_timer(unsigned long data) 547{ 548 struct sk_buff *skb; 549 struct cxgbi_sock *csk = (struct cxgbi_sock *)data; 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 569static 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 */ 604static 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 */ 621static 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 642static 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: /* fall through */ 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 659static 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 691out: 692 spin_unlock_bh(&csk->lock); 693 cxgbi_sock_put(csk); 694done: 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 */ 706static 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); 732rel_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 */ 742static 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 833abort_conn: 834 send_abort_req(csk); 835discard: 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 */ 846static 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 */ 864static 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 882free_cpl_skbs: 883 cxgbi_sock_free_cpl_skbs(csk); 884 return -ENOMEM; 885} 886 887/** 888 * release_offload_resources - release offload resource 889 * @c3cn: the offloaded iscsi tcp connection. 890 * Release resources held by an offload connection (TID, L2T entry, etc.) 891 */ 892static void l2t_put(struct cxgbi_sock *csk) 893{ 894 struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; 895 896 if (csk->l2t) { 897 l2t_release(t3dev, csk->l2t); 898 csk->l2t = NULL; 899 cxgbi_sock_put(csk); 900 } 901} 902 903static void release_offload_resources(struct cxgbi_sock *csk) 904{ 905 struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; 906 907 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 908 "csk 0x%p,%u,0x%lx,%u.\n", 909 csk, csk->state, csk->flags, csk->tid); 910 911 csk->rss_qid = 0; 912 cxgbi_sock_free_cpl_skbs(csk); 913 914 if (csk->wr_cred != csk->wr_max_cred) { 915 cxgbi_sock_purge_wr_queue(csk); 916 cxgbi_sock_reset_wr_list(csk); 917 } 918 l2t_put(csk); 919 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) 920 free_atid(csk); 921 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { 922 cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); 923 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); 924 cxgbi_sock_put(csk); 925 } 926 csk->dst = NULL; 927 csk->cdev = NULL; 928} 929 930static void update_address(struct cxgbi_hba *chba) 931{ 932 if (chba->ipv4addr) { 933 if (chba->vdev && 934 chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) { 935 cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr); 936 cxgb3i_set_private_ipv4addr(chba->ndev, 0); 937 pr_info("%s set %pI4.\n", 938 chba->vdev->name, &chba->ipv4addr); 939 } else if (chba->ipv4addr != 940 cxgb3i_get_private_ipv4addr(chba->ndev)) { 941 cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr); 942 pr_info("%s set %pI4.\n", 943 chba->ndev->name, &chba->ipv4addr); 944 } 945 } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) { 946 if (chba->vdev) 947 cxgb3i_set_private_ipv4addr(chba->vdev, 0); 948 cxgb3i_set_private_ipv4addr(chba->ndev, 0); 949 } 950} 951 952static int init_act_open(struct cxgbi_sock *csk) 953{ 954 struct dst_entry *dst = csk->dst; 955 struct cxgbi_device *cdev = csk->cdev; 956 struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; 957 struct net_device *ndev = cdev->ports[csk->port_id]; 958 struct cxgbi_hba *chba = cdev->hbas[csk->port_id]; 959 struct sk_buff *skb = NULL; 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 if (!csk->l2t) { 971 pr_err("NO l2t available.\n"); 972 return -EINVAL; 973 } 974 cxgbi_sock_get(csk); 975 976 csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); 977 if (csk->atid < 0) { 978 pr_err("NO atid available.\n"); 979 goto rel_resource; 980 } 981 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); 982 cxgbi_sock_get(csk); 983 984 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); 985 if (!skb) 986 goto rel_resource; 987 skb->sk = (struct sock *)csk; 988 set_arp_failure_handler(skb, act_open_arp_failure); 989 990 csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; 991 csk->wr_una_cred = 0; 992 csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); 993 cxgbi_sock_reset_wr_list(csk); 994 csk->err = 0; 995 996 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, 997 "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n", 998 csk, csk->state, csk->flags, 999 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), 1000 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); 1001 1002 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); 1003 send_act_open_req(csk, skb, csk->l2t); 1004 return 0; 1005 1006rel_resource: 1007 if (skb) 1008 __kfree_skb(skb); 1009 return -EINVAL; 1010} 1011 1012cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { 1013 [CPL_ACT_ESTABLISH] = do_act_establish, 1014 [CPL_ACT_OPEN_RPL] = do_act_open_rpl, 1015 [CPL_PEER_CLOSE] = do_peer_close, 1016 [CPL_ABORT_REQ_RSS] = do_abort_req, 1017 [CPL_ABORT_RPL_RSS] = do_abort_rpl, 1018 [CPL_CLOSE_CON_RPL] = do_close_con_rpl, 1019 [CPL_TX_DMA_ACK] = do_wr_ack, 1020 [CPL_ISCSI_HDR] = do_iscsi_hdr, 1021}; 1022 1023/** 1024 * cxgb3i_ofld_init - allocate and initialize resources for each adapter found 1025 * @cdev: cxgbi adapter 1026 */ 1027int cxgb3i_ofld_init(struct cxgbi_device *cdev) 1028{ 1029 struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; 1030 struct adap_ports port; 1031 struct ofld_page_info rx_page_info; 1032 unsigned int wr_len; 1033 int rc; 1034 1035 if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || 1036 t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || 1037 t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { 1038 pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev); 1039 return -EINVAL; 1040 } 1041 1042 if (cxgb3i_max_connect > CXGBI_MAX_CONN) 1043 cxgb3i_max_connect = CXGBI_MAX_CONN; 1044 1045 rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, 1046 cxgb3i_max_connect); 1047 if (rc < 0) 1048 return rc; 1049 1050 init_wr_tab(wr_len); 1051 cdev->csk_release_offload_resources = release_offload_resources; 1052 cdev->csk_push_tx_frames = push_tx_frames; 1053 cdev->csk_send_abort_req = send_abort_req; 1054 cdev->csk_send_close_req = send_close_req; 1055 cdev->csk_send_rx_credits = send_rx_credits; 1056 cdev->csk_alloc_cpls = alloc_cpls; 1057 cdev->csk_init_act_open = init_act_open; 1058 1059 pr_info("cdev 0x%p, offload up, added.\n", cdev); 1060 return 0; 1061} 1062 1063/* 1064 * functions to program the pagepod in h/w 1065 */ 1066static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) 1067{ 1068 struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; 1069 1070 memset(req, 0, sizeof(*req)); 1071 1072 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); 1073 req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | 1074 V_ULPTX_CMD(ULP_MEM_WRITE)); 1075 req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | 1076 V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); 1077} 1078 1079static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, 1080 unsigned int idx, unsigned int npods, 1081 struct cxgbi_gather_list *gl) 1082{ 1083 struct cxgbi_device *cdev = csk->cdev; 1084 struct cxgbi_ddp_info *ddp = cdev->ddp; 1085 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; 1086 int i; 1087 1088 log_debug(1 << CXGBI_DBG_DDP, 1089 "csk 0x%p, idx %u, npods %u, gl 0x%p.\n", 1090 csk, idx, npods, gl); 1091 1092 for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { 1093 struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + 1094 PPOD_SIZE, 0, GFP_ATOMIC); 1095 1096 if (!skb) 1097 return -ENOMEM; 1098 1099 ulp_mem_io_set_hdr(skb, pm_addr); 1100 cxgbi_ddp_ppod_set((struct cxgbi_pagepod *)(skb->head + 1101 sizeof(struct ulp_mem_io)), 1102 hdr, gl, i * PPOD_PAGES_MAX); 1103 skb->priority = CPL_PRIORITY_CONTROL; 1104 cxgb3_ofld_send(cdev->lldev, skb); 1105 } 1106 return 0; 1107} 1108 1109static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, 1110 unsigned int idx, unsigned int npods) 1111{ 1112 struct cxgbi_device *cdev = chba->cdev; 1113 struct cxgbi_ddp_info *ddp = cdev->ddp; 1114 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; 1115 int i; 1116 1117 log_debug(1 << CXGBI_DBG_DDP, 1118 "cdev 0x%p, idx %u, npods %u, tag 0x%x.\n", 1119 cdev, idx, npods, tag); 1120 1121 for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { 1122 struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + 1123 PPOD_SIZE, 0, GFP_ATOMIC); 1124 1125 if (!skb) { 1126 pr_err("tag 0x%x, 0x%x, %d/%u, skb OOM.\n", 1127 tag, idx, i, npods); 1128 continue; 1129 } 1130 ulp_mem_io_set_hdr(skb, pm_addr); 1131 skb->priority = CPL_PRIORITY_CONTROL; 1132 cxgb3_ofld_send(cdev->lldev, skb); 1133 } 1134} 1135 1136static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, 1137 unsigned int tid, int pg_idx, bool reply) 1138{ 1139 struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, 1140 GFP_KERNEL); 1141 struct cpl_set_tcb_field *req; 1142 u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; 1143 1144 log_debug(1 << CXGBI_DBG_DDP, 1145 "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx); 1146 if (!skb) 1147 return -ENOMEM; 1148 1149 /* set up ulp submode and page size */ 1150 req = (struct cpl_set_tcb_field *)skb->head; 1151 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1152 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1153 req->reply = V_NO_REPLY(reply ? 0 : 1); 1154 req->cpu_idx = 0; 1155 req->word = htons(31); 1156 req->mask = cpu_to_be64(0xF0000000); 1157 req->val = cpu_to_be64(val << 28); 1158 skb->priority = CPL_PRIORITY_CONTROL; 1159 1160 cxgb3_ofld_send(csk->cdev->lldev, skb); 1161 return 0; 1162} 1163 1164/** 1165 * cxgb3i_setup_conn_digest - setup conn. digest setting 1166 * @csk: cxgb tcp socket 1167 * @tid: connection id 1168 * @hcrc: header digest enabled 1169 * @dcrc: data digest enabled 1170 * @reply: request reply from h/w 1171 * set up the iscsi digest settings for a connection identified by tid 1172 */ 1173static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, 1174 int hcrc, int dcrc, int reply) 1175{ 1176 struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, 1177 GFP_KERNEL); 1178 struct cpl_set_tcb_field *req; 1179 u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); 1180 1181 log_debug(1 << CXGBI_DBG_DDP, 1182 "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc); 1183 if (!skb) 1184 return -ENOMEM; 1185 1186 /* set up ulp submode and page size */ 1187 req = (struct cpl_set_tcb_field *)skb->head; 1188 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1189 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 1190 req->reply = V_NO_REPLY(reply ? 0 : 1); 1191 req->cpu_idx = 0; 1192 req->word = htons(31); 1193 req->mask = cpu_to_be64(0x0F000000); 1194 req->val = cpu_to_be64(val << 24); 1195 skb->priority = CPL_PRIORITY_CONTROL; 1196 1197 cxgb3_ofld_send(csk->cdev->lldev, skb); 1198 return 0; 1199} 1200 1201/** 1202 * t3_ddp_cleanup - release the cxgb3 adapter's ddp resource 1203 * @cdev: cxgb3i adapter 1204 * release all the resource held by the ddp pagepod manager for a given 1205 * adapter if needed 1206 */ 1207 1208static void t3_ddp_cleanup(struct cxgbi_device *cdev) 1209{ 1210 struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; 1211 1212 if (cxgbi_ddp_cleanup(cdev)) { 1213 pr_info("t3dev 0x%p, ulp_iscsi no more user.\n", tdev); 1214 tdev->ulp_iscsi = NULL; 1215 } 1216} 1217 1218/** 1219 * ddp_init - initialize the cxgb3 adapter's ddp resource 1220 * @cdev: cxgb3i adapter 1221 * initialize the ddp pagepod manager for a given adapter 1222 */ 1223static int cxgb3i_ddp_init(struct cxgbi_device *cdev) 1224{ 1225 struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; 1226 struct cxgbi_ddp_info *ddp = tdev->ulp_iscsi; 1227 struct ulp_iscsi_info uinfo; 1228 unsigned int pgsz_factor[4]; 1229 int i, err; 1230 1231 if (ddp) { 1232 kref_get(&ddp->refcnt); 1233 pr_warn("t3dev 0x%p, ddp 0x%p already set up.\n", 1234 tdev, tdev->ulp_iscsi); 1235 cdev->ddp = ddp; 1236 return -EALREADY; 1237 } 1238 1239 err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); 1240 if (err < 0) { 1241 pr_err("%s, failed to get iscsi param err=%d.\n", 1242 tdev->name, err); 1243 return err; 1244 } 1245 1246 err = cxgbi_ddp_init(cdev, uinfo.llimit, uinfo.ulimit, 1247 uinfo.max_txsz, uinfo.max_rxsz); 1248 if (err < 0) 1249 return err; 1250 1251 ddp = cdev->ddp; 1252 1253 uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; 1254 cxgbi_ddp_page_size_factor(pgsz_factor); 1255 for (i = 0; i < 4; i++) 1256 uinfo.pgsz_factor[i] = pgsz_factor[i]; 1257 uinfo.ulimit = uinfo.llimit + (ddp->nppods << PPOD_SIZE_SHIFT); 1258 1259 err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); 1260 if (err < 0) { 1261 pr_warn("%s unable to set iscsi param err=%d, ddp disabled.\n", 1262 tdev->name, err); 1263 cxgbi_ddp_cleanup(cdev); 1264 return err; 1265 } 1266 tdev->ulp_iscsi = ddp; 1267 1268 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; 1269 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; 1270 cdev->csk_ddp_set = ddp_set_map; 1271 cdev->csk_ddp_clear = ddp_clear_map; 1272 1273 pr_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " 1274 "%u/%u.\n", 1275 tdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, 1276 ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, 1277 ddp->max_rxsz, uinfo.max_rxsz); 1278 return 0; 1279} 1280 1281static void cxgb3i_dev_close(struct t3cdev *t3dev) 1282{ 1283 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); 1284 1285 if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { 1286 pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0); 1287 return; 1288 } 1289 1290 cxgbi_device_unregister(cdev); 1291} 1292 1293/** 1294 * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings 1295 * @t3dev: t3cdev adapter 1296 */ 1297static void cxgb3i_dev_open(struct t3cdev *t3dev) 1298{ 1299 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); 1300 struct adapter *adapter = tdev2adap(t3dev); 1301 int i, err; 1302 1303 if (cdev) { 1304 pr_info("0x%p, updating.\n", cdev); 1305 return; 1306 } 1307 1308 cdev = cxgbi_device_register(0, adapter->params.nports); 1309 if (!cdev) { 1310 pr_warn("device 0x%p register failed.\n", t3dev); 1311 return; 1312 } 1313 1314 cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET; 1315 cdev->lldev = t3dev; 1316 cdev->pdev = adapter->pdev; 1317 cdev->ports = adapter->port; 1318 cdev->nports = adapter->params.nports; 1319 cdev->mtus = adapter->params.mtus; 1320 cdev->nmtus = NMTUS; 1321 cdev->snd_win = cxgb3i_snd_win; 1322 cdev->rcv_win = cxgb3i_rcv_win; 1323 cdev->rx_credit_thres = cxgb3i_rx_credit_thres; 1324 cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; 1325 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); 1326 cdev->dev_ddp_cleanup = t3_ddp_cleanup; 1327 cdev->itp = &cxgb3i_iscsi_transport; 1328 1329 err = cxgb3i_ddp_init(cdev); 1330 if (err) { 1331 pr_info("0x%p ddp init failed\n", cdev); 1332 goto err_out; 1333 } 1334 1335 err = cxgb3i_ofld_init(cdev); 1336 if (err) { 1337 pr_info("0x%p offload init failed\n", cdev); 1338 goto err_out; 1339 } 1340 1341 err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, 1342 &cxgb3i_host_template, cxgb3i_stt); 1343 if (err) 1344 goto err_out; 1345 1346 for (i = 0; i < cdev->nports; i++) 1347 cdev->hbas[i]->ipv4addr = 1348 cxgb3i_get_private_ipv4addr(cdev->ports[i]); 1349 1350 pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", 1351 cdev, cdev ? cdev->flags : 0, t3dev, err); 1352 return; 1353 1354err_out: 1355 cxgbi_device_unregister(cdev); 1356} 1357 1358static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) 1359{ 1360 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); 1361 1362 log_debug(1 << CXGBI_DBG_TOE, 1363 "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", 1364 t3dev, cdev, event, port); 1365 if (!cdev) 1366 return; 1367 1368 switch (event) { 1369 case OFFLOAD_STATUS_DOWN: 1370 cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; 1371 break; 1372 case OFFLOAD_STATUS_UP: 1373 cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; 1374 break; 1375 } 1376} 1377 1378/** 1379 * cxgb3i_init_module - module init entry point 1380 * 1381 * initialize any driver wide global data structures and register itself 1382 * with the cxgb3 module 1383 */ 1384static int __init cxgb3i_init_module(void) 1385{ 1386 int rc; 1387 1388 printk(KERN_INFO "%s", version); 1389 1390 rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt); 1391 if (rc < 0) 1392 return rc; 1393 1394 cxgb3_register_client(&t3_client); 1395 return 0; 1396} 1397 1398/** 1399 * cxgb3i_exit_module - module cleanup/exit entry point 1400 * 1401 * go through the driver hba list and for each hba, release any resource held. 1402 * and unregisters iscsi transport and the cxgb3 module 1403 */ 1404static void __exit cxgb3i_exit_module(void) 1405{ 1406 cxgb3_unregister_client(&t3_client); 1407 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); 1408 cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt); 1409} 1410 1411module_init(cxgb3i_init_module); 1412module_exit(cxgb3i_exit_module); 1413