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1/*2 * cxgb4i.c: Chelsio T4 iSCSI driver.3 *4 * Copyright (c) 2010-2015 Chelsio Communications, Inc.5 *6 * This program is free software; you can redistribute it and/or modify7 * it under the terms of the GNU General Public License as published by8 * the Free Software Foundation.9 *10 * Written by: Karen Xie (kxie@chelsio.com)11 * Rakesh Ranjan (rranjan@chelsio.com)12 */13 14#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__15 16#include <linux/kernel.h>17#include <linux/module.h>18#include <linux/moduleparam.h>19#include <scsi/scsi_host.h>20#include <net/tcp.h>21#include <net/dst.h>22#include <linux/netdevice.h>23#include <net/addrconf.h>24 25#include "t4_regs.h"26#include "t4_msg.h"27#include "cxgb4.h"28#include "cxgb4_uld.h"29#include "t4fw_api.h"30#include "l2t.h"31#include "cxgb4i.h"32#include "clip_tbl.h"33 34static unsigned int dbg_level;35 36#include "../libcxgbi.h"37 38#ifdef CONFIG_CHELSIO_T4_DCB39#include <net/dcbevent.h>40#include "cxgb4_dcb.h"41#endif42 43#define DRV_MODULE_NAME "cxgb4i"44#define DRV_MODULE_DESC "Chelsio T4-T6 iSCSI Driver"45#define DRV_MODULE_VERSION "0.9.5-ko"46#define DRV_MODULE_RELDATE "Apr. 2015"47 48static char version[] =49 DRV_MODULE_DESC " " DRV_MODULE_NAME50 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";51 52MODULE_AUTHOR("Chelsio Communications, Inc.");53MODULE_DESCRIPTION(DRV_MODULE_DESC);54MODULE_VERSION(DRV_MODULE_VERSION);55MODULE_LICENSE("GPL");56 57module_param(dbg_level, uint, 0644);58MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");59 60#define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)61static int cxgb4i_rcv_win = -1;62module_param(cxgb4i_rcv_win, int, 0644);63MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP receive window in bytes");64 65#define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)66static int cxgb4i_snd_win = -1;67module_param(cxgb4i_snd_win, int, 0644);68MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");69 70static int cxgb4i_rx_credit_thres = 10 * 1024;71module_param(cxgb4i_rx_credit_thres, int, 0644);72MODULE_PARM_DESC(cxgb4i_rx_credit_thres,73 "RX credits return threshold in bytes (default=10KB)");74 75static unsigned int cxgb4i_max_connect = (8 * 1024);76module_param(cxgb4i_max_connect, uint, 0644);77MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");78 79static unsigned short cxgb4i_sport_base = 20000;80module_param(cxgb4i_sport_base, ushort, 0644);81MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");82 83typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);84 85static void *t4_uld_add(const struct cxgb4_lld_info *);86static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);87static int t4_uld_state_change(void *, enum cxgb4_state state);88static inline int send_tx_flowc_wr(struct cxgbi_sock *);89 90static const struct cxgb4_uld_info cxgb4i_uld_info = {91 .name = DRV_MODULE_NAME,92 .nrxq = MAX_ULD_QSETS,93 .ntxq = MAX_ULD_QSETS,94 .rxq_size = 1024,95 .lro = false,96 .add = t4_uld_add,97 .rx_handler = t4_uld_rx_handler,98 .state_change = t4_uld_state_change,99};100 101static struct scsi_host_template cxgb4i_host_template = {102 .module = THIS_MODULE,103 .name = DRV_MODULE_NAME,104 .proc_name = DRV_MODULE_NAME,105 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,106 .queuecommand = iscsi_queuecommand,107 .change_queue_depth = scsi_change_queue_depth,108 .sg_tablesize = SG_ALL,109 .max_sectors = 0xFFFF,110 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,111 .eh_timed_out = iscsi_eh_cmd_timed_out,112 .eh_abort_handler = iscsi_eh_abort,113 .eh_device_reset_handler = iscsi_eh_device_reset,114 .eh_target_reset_handler = iscsi_eh_recover_target,115 .target_alloc = iscsi_target_alloc,116 .dma_boundary = PAGE_SIZE - 1,117 .this_id = -1,118 .track_queue_depth = 1,119 .cmd_size = sizeof(struct iscsi_cmd),120};121 122static struct iscsi_transport cxgb4i_iscsi_transport = {123 .owner = THIS_MODULE,124 .name = DRV_MODULE_NAME,125 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |126 CAP_DATADGST | CAP_DIGEST_OFFLOAD |127 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,128 .attr_is_visible = cxgbi_attr_is_visible,129 .get_host_param = cxgbi_get_host_param,130 .set_host_param = cxgbi_set_host_param,131 /* session management */132 .create_session = cxgbi_create_session,133 .destroy_session = cxgbi_destroy_session,134 .get_session_param = iscsi_session_get_param,135 /* connection management */136 .create_conn = cxgbi_create_conn,137 .bind_conn = cxgbi_bind_conn,138 .unbind_conn = iscsi_conn_unbind,139 .destroy_conn = iscsi_tcp_conn_teardown,140 .start_conn = iscsi_conn_start,141 .stop_conn = iscsi_conn_stop,142 .get_conn_param = iscsi_conn_get_param,143 .set_param = cxgbi_set_conn_param,144 .get_stats = cxgbi_get_conn_stats,145 /* pdu xmit req from user space */146 .send_pdu = iscsi_conn_send_pdu,147 /* task */148 .init_task = iscsi_tcp_task_init,149 .xmit_task = iscsi_tcp_task_xmit,150 .cleanup_task = cxgbi_cleanup_task,151 /* pdu */152 .alloc_pdu = cxgbi_conn_alloc_pdu,153 .init_pdu = cxgbi_conn_init_pdu,154 .xmit_pdu = cxgbi_conn_xmit_pdu,155 .parse_pdu_itt = cxgbi_parse_pdu_itt,156 /* TCP connect/disconnect */157 .get_ep_param = cxgbi_get_ep_param,158 .ep_connect = cxgbi_ep_connect,159 .ep_poll = cxgbi_ep_poll,160 .ep_disconnect = cxgbi_ep_disconnect,161 /* Error recovery timeout call */162 .session_recovery_timedout = iscsi_session_recovery_timedout,163};164 165#ifdef CONFIG_CHELSIO_T4_DCB166static int167cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *);168 169static struct notifier_block cxgb4_dcb_change = {170 .notifier_call = cxgb4_dcb_change_notify,171};172#endif173 174static struct scsi_transport_template *cxgb4i_stt;175 176/*177 * CPL (Chelsio Protocol Language) defines a message passing interface between178 * the host driver and Chelsio asic.179 * The section below implments CPLs that related to iscsi tcp connection180 * open/close/abort and data send/receive.181 */182 183#define RCV_BUFSIZ_MASK 0x3FFU184#define MAX_IMM_TX_PKT_LEN 256185 186static int push_tx_frames(struct cxgbi_sock *, int);187 188/*189 * is_ofld_imm - check whether a packet can be sent as immediate data190 * @skb: the packet191 *192 * Returns true if a packet can be sent as an offload WR with immediate193 * data. We currently use the same limit as for Ethernet packets.194 */195static inline bool is_ofld_imm(const struct sk_buff *skb)196{197 int len = skb->len;198 199 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))200 len += sizeof(struct fw_ofld_tx_data_wr);201 202 if (likely(cxgbi_skcb_test_flag((struct sk_buff *)skb, SKCBF_TX_ISO)))203 len += sizeof(struct cpl_tx_data_iso);204 205 return (len <= MAX_IMM_OFLD_TX_DATA_WR_LEN);206}207 208static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,209 struct l2t_entry *e)210{211 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);212 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);213 unsigned long long opt0;214 unsigned int opt2;215 unsigned int qid_atid = ((unsigned int)csk->atid) |216 (((unsigned int)csk->rss_qid) << 14);217 218 opt0 = KEEP_ALIVE_F |219 WND_SCALE_V(wscale) |220 MSS_IDX_V(csk->mss_idx) |221 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |222 TX_CHAN_V(csk->tx_chan) |223 SMAC_SEL_V(csk->smac_idx) |224 ULP_MODE_V(ULP_MODE_ISCSI) |225 RCV_BUFSIZ_V(csk->rcv_win >> 10);226 227 opt2 = RX_CHANNEL_V(0) |228 RSS_QUEUE_VALID_F |229 RSS_QUEUE_V(csk->rss_qid);230 231 if (is_t4(lldi->adapter_type)) {232 struct cpl_act_open_req *req =233 (struct cpl_act_open_req *)skb->head;234 235 INIT_TP_WR(req, 0);236 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,237 qid_atid));238 req->local_port = csk->saddr.sin_port;239 req->peer_port = csk->daddr.sin_port;240 req->local_ip = csk->saddr.sin_addr.s_addr;241 req->peer_ip = csk->daddr.sin_addr.s_addr;242 req->opt0 = cpu_to_be64(opt0);243 req->params = cpu_to_be32(cxgb4_select_ntuple(244 csk->cdev->ports[csk->port_id],245 csk->l2t));246 opt2 |= RX_FC_VALID_F;247 req->opt2 = cpu_to_be32(opt2);248 249 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,250 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",251 csk, &req->local_ip, ntohs(req->local_port),252 &req->peer_ip, ntohs(req->peer_port),253 csk->atid, csk->rss_qid);254 } else if (is_t5(lldi->adapter_type)) {255 struct cpl_t5_act_open_req *req =256 (struct cpl_t5_act_open_req *)skb->head;257 u32 isn = (get_random_u32() & ~7UL) - 1;258 259 INIT_TP_WR(req, 0);260 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,261 qid_atid));262 req->local_port = csk->saddr.sin_port;263 req->peer_port = csk->daddr.sin_port;264 req->local_ip = csk->saddr.sin_addr.s_addr;265 req->peer_ip = csk->daddr.sin_addr.s_addr;266 req->opt0 = cpu_to_be64(opt0);267 req->params = cpu_to_be64(FILTER_TUPLE_V(268 cxgb4_select_ntuple(269 csk->cdev->ports[csk->port_id],270 csk->l2t)));271 req->rsvd = cpu_to_be32(isn);272 opt2 |= T5_ISS_VALID;273 opt2 |= T5_OPT_2_VALID_F;274 275 req->opt2 = cpu_to_be32(opt2);276 277 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,278 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",279 csk, &req->local_ip, ntohs(req->local_port),280 &req->peer_ip, ntohs(req->peer_port),281 csk->atid, csk->rss_qid);282 } else {283 struct cpl_t6_act_open_req *req =284 (struct cpl_t6_act_open_req *)skb->head;285 u32 isn = (get_random_u32() & ~7UL) - 1;286 287 INIT_TP_WR(req, 0);288 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,289 qid_atid));290 req->local_port = csk->saddr.sin_port;291 req->peer_port = csk->daddr.sin_port;292 req->local_ip = csk->saddr.sin_addr.s_addr;293 req->peer_ip = csk->daddr.sin_addr.s_addr;294 req->opt0 = cpu_to_be64(opt0);295 req->params = cpu_to_be64(FILTER_TUPLE_V(296 cxgb4_select_ntuple(297 csk->cdev->ports[csk->port_id],298 csk->l2t)));299 req->rsvd = cpu_to_be32(isn);300 301 opt2 |= T5_ISS_VALID;302 opt2 |= RX_FC_DISABLE_F;303 opt2 |= T5_OPT_2_VALID_F;304 305 req->opt2 = cpu_to_be32(opt2);306 req->rsvd2 = cpu_to_be32(0);307 req->opt3 = cpu_to_be32(0);308 309 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,310 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",311 csk, &req->local_ip, ntohs(req->local_port),312 &req->peer_ip, ntohs(req->peer_port),313 csk->atid, csk->rss_qid);314 }315 316 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);317 318 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",319 (&csk->saddr), (&csk->daddr),320 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,321 csk->state, csk->flags, csk->atid, csk->rss_qid);322 323 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);324}325 326#if IS_ENABLED(CONFIG_IPV6)327static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,328 struct l2t_entry *e)329{330 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);331 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);332 unsigned long long opt0;333 unsigned int opt2;334 unsigned int qid_atid = ((unsigned int)csk->atid) |335 (((unsigned int)csk->rss_qid) << 14);336 337 opt0 = KEEP_ALIVE_F |338 WND_SCALE_V(wscale) |339 MSS_IDX_V(csk->mss_idx) |340 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |341 TX_CHAN_V(csk->tx_chan) |342 SMAC_SEL_V(csk->smac_idx) |343 ULP_MODE_V(ULP_MODE_ISCSI) |344 RCV_BUFSIZ_V(csk->rcv_win >> 10);345 346 opt2 = RX_CHANNEL_V(0) |347 RSS_QUEUE_VALID_F |348 RSS_QUEUE_V(csk->rss_qid);349 350 if (is_t4(lldi->adapter_type)) {351 struct cpl_act_open_req6 *req =352 (struct cpl_act_open_req6 *)skb->head;353 354 INIT_TP_WR(req, 0);355 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,356 qid_atid));357 req->local_port = csk->saddr6.sin6_port;358 req->peer_port = csk->daddr6.sin6_port;359 360 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);361 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +362 8);363 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);364 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +365 8);366 367 req->opt0 = cpu_to_be64(opt0);368 369 opt2 |= RX_FC_VALID_F;370 req->opt2 = cpu_to_be32(opt2);371 372 req->params = cpu_to_be32(cxgb4_select_ntuple(373 csk->cdev->ports[csk->port_id],374 csk->l2t));375 } else if (is_t5(lldi->adapter_type)) {376 struct cpl_t5_act_open_req6 *req =377 (struct cpl_t5_act_open_req6 *)skb->head;378 379 INIT_TP_WR(req, 0);380 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,381 qid_atid));382 req->local_port = csk->saddr6.sin6_port;383 req->peer_port = csk->daddr6.sin6_port;384 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);385 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +386 8);387 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);388 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +389 8);390 req->opt0 = cpu_to_be64(opt0);391 392 opt2 |= T5_OPT_2_VALID_F;393 req->opt2 = cpu_to_be32(opt2);394 395 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(396 csk->cdev->ports[csk->port_id],397 csk->l2t)));398 } else {399 struct cpl_t6_act_open_req6 *req =400 (struct cpl_t6_act_open_req6 *)skb->head;401 402 INIT_TP_WR(req, 0);403 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,404 qid_atid));405 req->local_port = csk->saddr6.sin6_port;406 req->peer_port = csk->daddr6.sin6_port;407 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);408 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +409 8);410 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);411 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +412 8);413 req->opt0 = cpu_to_be64(opt0);414 415 opt2 |= RX_FC_DISABLE_F;416 opt2 |= T5_OPT_2_VALID_F;417 418 req->opt2 = cpu_to_be32(opt2);419 420 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(421 csk->cdev->ports[csk->port_id],422 csk->l2t)));423 424 req->rsvd2 = cpu_to_be32(0);425 req->opt3 = cpu_to_be32(0);426 }427 428 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);429 430 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",431 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,432 csk->flags, csk->atid,433 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),434 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),435 csk->rss_qid);436 437 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);438}439#endif440 441static void send_close_req(struct cxgbi_sock *csk)442{443 struct sk_buff *skb = csk->cpl_close;444 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;445 unsigned int tid = csk->tid;446 447 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,448 "csk 0x%p,%u,0x%lx, tid %u.\n",449 csk, csk->state, csk->flags, csk->tid);450 csk->cpl_close = NULL;451 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);452 INIT_TP_WR(req, tid);453 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));454 req->rsvd = 0;455 456 cxgbi_sock_skb_entail(csk, skb);457 if (csk->state >= CTP_ESTABLISHED)458 push_tx_frames(csk, 1);459}460 461static void abort_arp_failure(void *handle, struct sk_buff *skb)462{463 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;464 struct cpl_abort_req *req;465 466 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,467 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",468 csk, csk->state, csk->flags, csk->tid);469 req = (struct cpl_abort_req *)skb->data;470 req->cmd = CPL_ABORT_NO_RST;471 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);472}473 474static void send_abort_req(struct cxgbi_sock *csk)475{476 struct cpl_abort_req *req;477 struct sk_buff *skb = csk->cpl_abort_req;478 479 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)480 return;481 482 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {483 send_tx_flowc_wr(csk);484 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);485 }486 487 cxgbi_sock_set_state(csk, CTP_ABORTING);488 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);489 cxgbi_sock_purge_write_queue(csk);490 491 csk->cpl_abort_req = NULL;492 req = (struct cpl_abort_req *)skb->head;493 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);494 req->cmd = CPL_ABORT_SEND_RST;495 t4_set_arp_err_handler(skb, csk, abort_arp_failure);496 INIT_TP_WR(req, csk->tid);497 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));498 req->rsvd0 = htonl(csk->snd_nxt);499 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);500 501 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,502 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",503 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,504 req->rsvd1);505 506 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);507}508 509static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)510{511 struct sk_buff *skb = csk->cpl_abort_rpl;512 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;513 514 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,515 "csk 0x%p,%u,0x%lx,%u, status %d.\n",516 csk, csk->state, csk->flags, csk->tid, rst_status);517 518 csk->cpl_abort_rpl = NULL;519 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);520 INIT_TP_WR(rpl, csk->tid);521 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));522 rpl->cmd = rst_status;523 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);524}525 526/*527 * CPL connection rx data ack: host ->528 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of529 * credits sent.530 */531static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)532{533 struct sk_buff *skb;534 struct cpl_rx_data_ack *req;535 536 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,537 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",538 csk, csk->state, csk->flags, csk->tid, credits);539 540 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);541 if (!skb) {542 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);543 return 0;544 }545 req = (struct cpl_rx_data_ack *)skb->head;546 547 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);548 INIT_TP_WR(req, csk->tid);549 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,550 csk->tid));551 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)552 | RX_FORCE_ACK_F);553 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);554 return credits;555}556 557/*558 * sgl_len - calculates the size of an SGL of the given capacity559 * @n: the number of SGL entries560 * Calculates the number of flits needed for a scatter/gather list that561 * can hold the given number of entries.562 */563static inline unsigned int sgl_len(unsigned int n)564{565 n--;566 return (3 * n) / 2 + (n & 1) + 2;567}568 569/*570 * calc_tx_flits_ofld - calculate # of flits for an offload packet571 * @skb: the packet572 *573 * Returns the number of flits needed for the given offload packet.574 * These packets are already fully constructed and no additional headers575 * will be added.576 */577static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)578{579 unsigned int flits, cnt;580 581 if (is_ofld_imm(skb))582 return DIV_ROUND_UP(skb->len, 8);583 flits = skb_transport_offset(skb) / 8;584 cnt = skb_shinfo(skb)->nr_frags;585 if (skb_tail_pointer(skb) != skb_transport_header(skb))586 cnt++;587 return flits + sgl_len(cnt);588}589 590#define FLOWC_WR_NPARAMS_MIN 9591static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)592{593 int nparams, flowclen16, flowclen;594 595 nparams = FLOWC_WR_NPARAMS_MIN;596#ifdef CONFIG_CHELSIO_T4_DCB597 nparams++;598#endif599 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);600 flowclen16 = DIV_ROUND_UP(flowclen, 16);601 flowclen = flowclen16 * 16;602 /*603 * Return the number of 16-byte credits used by the FlowC request.604 * Pass back the nparams and actual FlowC length if requested.605 */606 if (nparamsp)607 *nparamsp = nparams;608 if (flowclenp)609 *flowclenp = flowclen;610 611 return flowclen16;612}613 614static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)615{616 struct sk_buff *skb;617 struct fw_flowc_wr *flowc;618 int nparams, flowclen16, flowclen;619 620#ifdef CONFIG_CHELSIO_T4_DCB621 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;622#endif623 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);624 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);625 flowc = (struct fw_flowc_wr *)skb->head;626 flowc->op_to_nparams =627 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));628 flowc->flowid_len16 =629 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));630 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;631 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);632 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;633 flowc->mnemval[1].val = htonl(csk->tx_chan);634 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;635 flowc->mnemval[2].val = htonl(csk->tx_chan);636 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;637 flowc->mnemval[3].val = htonl(csk->rss_qid);638 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;639 flowc->mnemval[4].val = htonl(csk->snd_nxt);640 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;641 flowc->mnemval[5].val = htonl(csk->rcv_nxt);642 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;643 flowc->mnemval[6].val = htonl(csk->snd_win);644 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;645 flowc->mnemval[7].val = htonl(csk->advmss);646 flowc->mnemval[8].mnemonic = 0;647 flowc->mnemval[8].val = 0;648 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;649 if (csk->cdev->skb_iso_txhdr)650 flowc->mnemval[8].val = cpu_to_be32(CXGBI_MAX_ISO_DATA_IN_SKB);651 else652 flowc->mnemval[8].val = cpu_to_be32(16128);653#ifdef CONFIG_CHELSIO_T4_DCB654 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;655 if (vlan == CPL_L2T_VLAN_NONE) {656 pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n",657 csk->tid);658 flowc->mnemval[9].val = cpu_to_be32(0);659 } else {660 flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >>661 VLAN_PRIO_SHIFT);662 }663#endif664 665 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);666 667 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,668 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",669 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,670 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,671 csk->advmss);672 673 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);674 675 return flowclen16;676}677 678static void679cxgb4i_make_tx_iso_cpl(struct sk_buff *skb, struct cpl_tx_data_iso *cpl)680{681 struct cxgbi_iso_info *info = (struct cxgbi_iso_info *)skb->head;682 u32 imm_en = !!(info->flags & CXGBI_ISO_INFO_IMM_ENABLE);683 u32 fslice = !!(info->flags & CXGBI_ISO_INFO_FSLICE);684 u32 lslice = !!(info->flags & CXGBI_ISO_INFO_LSLICE);685 u32 pdu_type = (info->op == ISCSI_OP_SCSI_CMD) ? 0 : 1;686 u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;687 688 cpl->op_to_scsi = cpu_to_be32(CPL_TX_DATA_ISO_OP_V(CPL_TX_DATA_ISO) |689 CPL_TX_DATA_ISO_FIRST_V(fslice) |690 CPL_TX_DATA_ISO_LAST_V(lslice) |691 CPL_TX_DATA_ISO_CPLHDRLEN_V(0) |692 CPL_TX_DATA_ISO_HDRCRC_V(submode & 1) |693 CPL_TX_DATA_ISO_PLDCRC_V(((submode >> 1) & 1)) |694 CPL_TX_DATA_ISO_IMMEDIATE_V(imm_en) |695 CPL_TX_DATA_ISO_SCSI_V(pdu_type));696 697 cpl->ahs_len = info->ahs;698 cpl->mpdu = cpu_to_be16(DIV_ROUND_UP(info->mpdu, 4));699 cpl->burst_size = cpu_to_be32(info->burst_size);700 cpl->len = cpu_to_be32(info->len);701 cpl->reserved2_seglen_offset =702 cpu_to_be32(CPL_TX_DATA_ISO_SEGLEN_OFFSET_V(info->segment_offset));703 cpl->datasn_offset = cpu_to_be32(info->datasn_offset);704 cpl->buffer_offset = cpu_to_be32(info->buffer_offset);705 cpl->reserved3 = cpu_to_be32(0);706 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,707 "iso: flags 0x%x, op %u, ahs %u, num_pdu %u, mpdu %u, "708 "burst_size %u, iso_len %u\n",709 info->flags, info->op, info->ahs, info->num_pdu,710 info->mpdu, info->burst_size << 2, info->len);711}712 713static void714cxgb4i_make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int dlen,715 int len, u32 credits, int compl)716{717 struct cxgbi_device *cdev = csk->cdev;718 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);719 struct fw_ofld_tx_data_wr *req;720 struct cpl_tx_data_iso *cpl;721 u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;722 u32 wr_ulp_mode = 0;723 u32 hdr_size = sizeof(*req);724 u32 opcode = FW_OFLD_TX_DATA_WR;725 u32 immlen = 0;726 u32 force = is_t5(lldi->adapter_type) ? TX_FORCE_V(!submode) :727 T6_TX_FORCE_F;728 729 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {730 hdr_size += sizeof(struct cpl_tx_data_iso);731 opcode = FW_ISCSI_TX_DATA_WR;732 immlen += sizeof(struct cpl_tx_data_iso);733 submode |= 8;734 }735 736 if (is_ofld_imm(skb))737 immlen += dlen;738 739 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, hdr_size);740 req->op_to_immdlen = cpu_to_be32(FW_WR_OP_V(opcode) |741 FW_WR_COMPL_V(compl) |742 FW_WR_IMMDLEN_V(immlen));743 req->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |744 FW_WR_LEN16_V(credits));745 req->plen = cpu_to_be32(len);746 cpl = (struct cpl_tx_data_iso *)(req + 1);747 748 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)))749 cxgb4i_make_tx_iso_cpl(skb, cpl);750 751 if (submode)752 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |753 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);754 755 req->tunnel_to_proxy = cpu_to_be32(wr_ulp_mode | force |756 FW_OFLD_TX_DATA_WR_SHOVE_V(1U));757 758 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))759 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);760}761 762static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)763{764 kfree_skb(skb);765}766 767static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)768{769 int total_size = 0;770 struct sk_buff *skb;771 772 if (unlikely(csk->state < CTP_ESTABLISHED ||773 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {774 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |775 1 << CXGBI_DBG_PDU_TX,776 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",777 csk, csk->state, csk->flags, csk->tid);778 return 0;779 }780 781 while (csk->wr_cred && ((skb = skb_peek(&csk->write_queue)) != NULL)) {782 struct cxgbi_iso_info *iso_cpl;783 u32 dlen = skb->len;784 u32 len = skb->len;785 u32 iso_cpl_len = 0;786 u32 flowclen16 = 0;787 u32 credits_needed;788 u32 num_pdu = 1, hdr_len;789 790 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))791 iso_cpl_len = sizeof(struct cpl_tx_data_iso);792 793 if (is_ofld_imm(skb))794 credits_needed = DIV_ROUND_UP(dlen + iso_cpl_len, 16);795 else796 credits_needed =797 DIV_ROUND_UP((8 * calc_tx_flits_ofld(skb)) +798 iso_cpl_len, 16);799 800 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))801 credits_needed +=802 DIV_ROUND_UP(sizeof(struct fw_ofld_tx_data_wr), 16);803 804 /*805 * Assumes the initial credits is large enough to support806 * fw_flowc_wr plus largest possible first payload807 */808 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {809 flowclen16 = send_tx_flowc_wr(csk);810 csk->wr_cred -= flowclen16;811 csk->wr_una_cred += flowclen16;812 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);813 }814 815 if (csk->wr_cred < credits_needed) {816 log_debug(1 << CXGBI_DBG_PDU_TX,817 "csk 0x%p, skb %u/%u, wr %d < %u.\n",818 csk, skb->len, skb->data_len,819 credits_needed, csk->wr_cred);820 821 csk->no_tx_credits++;822 break;823 }824 825 csk->no_tx_credits = 0;826 827 __skb_unlink(skb, &csk->write_queue);828 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);829 skb->csum = (__force __wsum)(credits_needed + flowclen16);830 csk->wr_cred -= credits_needed;831 csk->wr_una_cred += credits_needed;832 cxgbi_sock_enqueue_wr(csk, skb);833 834 log_debug(1 << CXGBI_DBG_PDU_TX,835 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",836 csk, skb->len, skb->data_len, credits_needed,837 csk->wr_cred, csk->wr_una_cred);838 839 if (!req_completion &&840 ((csk->wr_una_cred >= (csk->wr_max_cred / 2)) ||841 after(csk->write_seq, (csk->snd_una + csk->snd_win / 2))))842 req_completion = 1;843 844 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {845 u32 ulp_mode = cxgbi_skcb_tx_ulp_mode(skb);846 847 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {848 iso_cpl = (struct cxgbi_iso_info *)skb->head;849 num_pdu = iso_cpl->num_pdu;850 hdr_len = cxgbi_skcb_tx_iscsi_hdrlen(skb);851 len += (cxgbi_ulp_extra_len(ulp_mode) * num_pdu) +852 (hdr_len * (num_pdu - 1));853 } else {854 len += cxgbi_ulp_extra_len(ulp_mode);855 }856 857 cxgb4i_make_tx_data_wr(csk, skb, dlen, len,858 credits_needed, req_completion);859 csk->snd_nxt += len;860 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);861 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&862 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {863 struct cpl_close_con_req *req =864 (struct cpl_close_con_req *)skb->data;865 866 req->wr.wr_hi |= cpu_to_be32(FW_WR_COMPL_F);867 }868 869 total_size += skb->truesize;870 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);871 872 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,873 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",874 csk, csk->state, csk->flags, csk->tid, skb, len);875 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);876 }877 return total_size;878}879 880static inline void free_atid(struct cxgbi_sock *csk)881{882 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);883 884 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {885 cxgb4_free_atid(lldi->tids, csk->atid);886 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);887 cxgbi_sock_put(csk);888 }889}890 891static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)892{893 struct cxgbi_sock *csk;894 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;895 unsigned short tcp_opt = ntohs(req->tcp_opt);896 unsigned int tid = GET_TID(req);897 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));898 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);899 struct tid_info *t = lldi->tids;900 u32 rcv_isn = be32_to_cpu(req->rcv_isn);901 902 csk = lookup_atid(t, atid);903 if (unlikely(!csk)) {904 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);905 goto rel_skb;906 }907 908 if (csk->atid != atid) {909 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",910 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);911 goto rel_skb;912 }913 914 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",915 (&csk->saddr), (&csk->daddr),916 atid, tid, csk, csk->state, csk->flags, rcv_isn);917 918 module_put(cdev->owner);919 920 cxgbi_sock_get(csk);921 csk->tid = tid;922 cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);923 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);924 925 free_atid(csk);926 927 spin_lock_bh(&csk->lock);928 if (unlikely(csk->state != CTP_ACTIVE_OPEN))929 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",930 csk, csk->state, csk->flags, csk->tid);931 932 if (csk->retry_timer.function) {933 del_timer(&csk->retry_timer);934 csk->retry_timer.function = NULL;935 }936 937 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;938 /*939 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't940 * pass through opt0.941 */942 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))943 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);944 945 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;946 if (TCPOPT_TSTAMP_G(tcp_opt))947 csk->advmss -= 12;948 if (csk->advmss < 128)949 csk->advmss = 128;950 951 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,952 "csk 0x%p, mss_idx %u, advmss %u.\n",953 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);954 955 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));956 957 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))958 send_abort_req(csk);959 else {960 if (skb_queue_len(&csk->write_queue))961 push_tx_frames(csk, 0);962 cxgbi_conn_tx_open(csk);963 }964 spin_unlock_bh(&csk->lock);965 966rel_skb:967 __kfree_skb(skb);968}969 970static int act_open_rpl_status_to_errno(int status)971{972 switch (status) {973 case CPL_ERR_CONN_RESET:974 return -ECONNREFUSED;975 case CPL_ERR_ARP_MISS:976 return -EHOSTUNREACH;977 case CPL_ERR_CONN_TIMEDOUT:978 return -ETIMEDOUT;979 case CPL_ERR_TCAM_FULL:980 return -ENOMEM;981 case CPL_ERR_CONN_EXIST:982 return -EADDRINUSE;983 default:984 return -EIO;985 }986}987 988static void csk_act_open_retry_timer(struct timer_list *t)989{990 struct sk_buff *skb = NULL;991 struct cxgbi_sock *csk = from_timer(csk, t, retry_timer);992 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);993 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,994 struct l2t_entry *);995 int t4 = is_t4(lldi->adapter_type), size, size6;996 997 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,998 "csk 0x%p,%u,0x%lx,%u.\n",999 csk, csk->state, csk->flags, csk->tid);1000 1001 cxgbi_sock_get(csk);1002 spin_lock_bh(&csk->lock);1003 1004 if (t4) {1005 size = sizeof(struct cpl_act_open_req);1006 size6 = sizeof(struct cpl_act_open_req6);1007 } else {1008 size = sizeof(struct cpl_t5_act_open_req);1009 size6 = sizeof(struct cpl_t5_act_open_req6);1010 }1011 1012 if (csk->csk_family == AF_INET) {1013 send_act_open_func = send_act_open_req;1014 skb = alloc_wr(size, 0, GFP_ATOMIC);1015#if IS_ENABLED(CONFIG_IPV6)1016 } else {1017 send_act_open_func = send_act_open_req6;1018 skb = alloc_wr(size6, 0, GFP_ATOMIC);1019#endif1020 }1021 1022 if (!skb)1023 cxgbi_sock_fail_act_open(csk, -ENOMEM);1024 else {1025 skb->sk = (struct sock *)csk;1026 t4_set_arp_err_handler(skb, csk,1027 cxgbi_sock_act_open_req_arp_failure);1028 send_act_open_func(csk, skb, csk->l2t);1029 }1030 1031 spin_unlock_bh(&csk->lock);1032 cxgbi_sock_put(csk);1033 1034}1035 1036static inline bool is_neg_adv(unsigned int status)1037{1038 return status == CPL_ERR_RTX_NEG_ADVICE ||1039 status == CPL_ERR_KEEPALV_NEG_ADVICE ||1040 status == CPL_ERR_PERSIST_NEG_ADVICE;1041}1042 1043static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)1044{1045 struct cxgbi_sock *csk;1046 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;1047 unsigned int tid = GET_TID(rpl);1048 unsigned int atid =1049 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));1050 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));1051 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1052 struct tid_info *t = lldi->tids;1053 1054 csk = lookup_atid(t, atid);1055 if (unlikely(!csk)) {1056 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);1057 goto rel_skb;1058 }1059 1060 pr_info_ipaddr("tid %u/%u, status %u.\n"1061 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),1062 atid, tid, status, csk, csk->state, csk->flags);1063 1064 if (is_neg_adv(status))1065 goto rel_skb;1066 1067 module_put(cdev->owner);1068 1069 if (status && status != CPL_ERR_TCAM_FULL &&1070 status != CPL_ERR_CONN_EXIST &&1071 status != CPL_ERR_ARP_MISS)1072 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl),1073 csk->csk_family);1074 1075 cxgbi_sock_get(csk);1076 spin_lock_bh(&csk->lock);1077 1078 if (status == CPL_ERR_CONN_EXIST &&1079 csk->retry_timer.function != csk_act_open_retry_timer) {1080 csk->retry_timer.function = csk_act_open_retry_timer;1081 mod_timer(&csk->retry_timer, jiffies + HZ / 2);1082 } else1083 cxgbi_sock_fail_act_open(csk,1084 act_open_rpl_status_to_errno(status));1085 1086 spin_unlock_bh(&csk->lock);1087 cxgbi_sock_put(csk);1088rel_skb:1089 __kfree_skb(skb);1090}1091 1092static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)1093{1094 struct cxgbi_sock *csk;1095 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;1096 unsigned int tid = GET_TID(req);1097 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1098 struct tid_info *t = lldi->tids;1099 1100 csk = lookup_tid(t, tid);1101 if (unlikely(!csk)) {1102 pr_err("can't find connection for tid %u.\n", tid);1103 goto rel_skb;1104 }1105 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",1106 (&csk->saddr), (&csk->daddr),1107 csk, csk->state, csk->flags, csk->tid);1108 cxgbi_sock_rcv_peer_close(csk);1109rel_skb:1110 __kfree_skb(skb);1111}1112 1113static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)1114{1115 struct cxgbi_sock *csk;1116 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;1117 unsigned int tid = GET_TID(rpl);1118 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1119 struct tid_info *t = lldi->tids;1120 1121 csk = lookup_tid(t, tid);1122 if (unlikely(!csk)) {1123 pr_err("can't find connection for tid %u.\n", tid);1124 goto rel_skb;1125 }1126 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",1127 (&csk->saddr), (&csk->daddr),1128 csk, csk->state, csk->flags, csk->tid);1129 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));1130rel_skb:1131 __kfree_skb(skb);1132}1133 1134static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,1135 int *need_rst)1136{1137 switch (abort_reason) {1138 case CPL_ERR_BAD_SYN:1139 case CPL_ERR_CONN_RESET:1140 return csk->state > CTP_ESTABLISHED ?1141 -EPIPE : -ECONNRESET;1142 case CPL_ERR_XMIT_TIMEDOUT:1143 case CPL_ERR_PERSIST_TIMEDOUT:1144 case CPL_ERR_FINWAIT2_TIMEDOUT:1145 case CPL_ERR_KEEPALIVE_TIMEDOUT:1146 return -ETIMEDOUT;1147 default:1148 return -EIO;1149 }1150}1151 1152static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)1153{1154 struct cxgbi_sock *csk;1155 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;1156 unsigned int tid = GET_TID(req);1157 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1158 struct tid_info *t = lldi->tids;1159 int rst_status = CPL_ABORT_NO_RST;1160 1161 csk = lookup_tid(t, tid);1162 if (unlikely(!csk)) {1163 pr_err("can't find connection for tid %u.\n", tid);1164 goto rel_skb;1165 }1166 1167 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",1168 (&csk->saddr), (&csk->daddr),1169 csk, csk->state, csk->flags, csk->tid, req->status);1170 1171 if (is_neg_adv(req->status))1172 goto rel_skb;1173 1174 cxgbi_sock_get(csk);1175 spin_lock_bh(&csk->lock);1176 1177 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);1178 1179 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {1180 send_tx_flowc_wr(csk);1181 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);1182 }1183 1184 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);1185 cxgbi_sock_set_state(csk, CTP_ABORTING);1186 1187 send_abort_rpl(csk, rst_status);1188 1189 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {1190 csk->err = abort_status_to_errno(csk, req->status, &rst_status);1191 cxgbi_sock_closed(csk);1192 }1193 1194 spin_unlock_bh(&csk->lock);1195 cxgbi_sock_put(csk);1196rel_skb:1197 __kfree_skb(skb);1198}1199 1200static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)1201{1202 struct cxgbi_sock *csk;1203 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;1204 unsigned int tid = GET_TID(rpl);1205 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1206 struct tid_info *t = lldi->tids;1207 1208 csk = lookup_tid(t, tid);1209 if (!csk)1210 goto rel_skb;1211 1212 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",1213 (&csk->saddr), (&csk->daddr), csk,1214 csk->state, csk->flags, csk->tid, rpl->status);1215 1216 if (rpl->status == CPL_ERR_ABORT_FAILED)1217 goto rel_skb;1218 1219 cxgbi_sock_rcv_abort_rpl(csk);1220rel_skb:1221 __kfree_skb(skb);1222}1223 1224static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)1225{1226 struct cxgbi_sock *csk;1227 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;1228 unsigned int tid = GET_TID(cpl);1229 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1230 struct tid_info *t = lldi->tids;1231 1232 csk = lookup_tid(t, tid);1233 if (!csk) {1234 pr_err("can't find connection for tid %u.\n", tid);1235 } else {1236 /* not expecting this, reset the connection. */1237 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);1238 spin_lock_bh(&csk->lock);1239 send_abort_req(csk);1240 spin_unlock_bh(&csk->lock);1241 }1242 __kfree_skb(skb);1243}1244 1245static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)1246{1247 struct cxgbi_sock *csk;1248 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;1249 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);1250 unsigned int tid = GET_TID(cpl);1251 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1252 struct tid_info *t = lldi->tids;1253 1254 csk = lookup_tid(t, tid);1255 if (unlikely(!csk)) {1256 pr_err("can't find conn. for tid %u.\n", tid);1257 goto rel_skb;1258 }1259 1260 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1261 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",1262 csk, csk->state, csk->flags, csk->tid, skb, skb->len,1263 pdu_len_ddp);1264 1265 spin_lock_bh(&csk->lock);1266 1267 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {1268 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1269 "csk 0x%p,%u,0x%lx,%u, bad state.\n",1270 csk, csk->state, csk->flags, csk->tid);1271 if (csk->state != CTP_ABORTING)1272 goto abort_conn;1273 else1274 goto discard;1275 }1276 1277 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);1278 cxgbi_skcb_flags(skb) = 0;1279 1280 skb_reset_transport_header(skb);1281 __skb_pull(skb, sizeof(*cpl));1282 __pskb_trim(skb, ntohs(cpl->len));1283 1284 if (!csk->skb_ulp_lhdr) {1285 unsigned char *bhs;1286 unsigned int hlen, dlen, plen;1287 1288 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1289 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",1290 csk, csk->state, csk->flags, csk->tid, skb);1291 csk->skb_ulp_lhdr = skb;1292 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);1293 1294 if ((CHELSIO_CHIP_VERSION(lldi->adapter_type) <= CHELSIO_T5) &&1295 (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt)) {1296 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",1297 csk->tid, cxgbi_skcb_tcp_seq(skb),1298 csk->rcv_nxt);1299 goto abort_conn;1300 }1301 1302 bhs = skb->data;1303 hlen = ntohs(cpl->len);1304 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;1305 1306 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);1307 if (is_t4(lldi->adapter_type))1308 plen -= 40;1309 1310 if ((hlen + dlen) != plen) {1311 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "1312 "mismatch %u != %u + %u, seq 0x%x.\n",1313 csk->tid, plen, hlen, dlen,1314 cxgbi_skcb_tcp_seq(skb));1315 goto abort_conn;1316 }1317 1318 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);1319 if (dlen)1320 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;1321 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);1322 1323 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1324 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",1325 csk, skb, *bhs, hlen, dlen,1326 ntohl(*((unsigned int *)(bhs + 16))),1327 ntohl(*((unsigned int *)(bhs + 24))));1328 1329 } else {1330 struct sk_buff *lskb = csk->skb_ulp_lhdr;1331 1332 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);1333 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1334 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",1335 csk, csk->state, csk->flags, skb, lskb);1336 }1337 1338 __skb_queue_tail(&csk->receive_queue, skb);1339 spin_unlock_bh(&csk->lock);1340 return;1341 1342abort_conn:1343 send_abort_req(csk);1344discard:1345 spin_unlock_bh(&csk->lock);1346rel_skb:1347 __kfree_skb(skb);1348}1349 1350static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)1351{1352 struct cxgbi_sock *csk;1353 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;1354 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1355 struct tid_info *t = lldi->tids;1356 struct sk_buff *lskb;1357 u32 tid = GET_TID(cpl);1358 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);1359 1360 csk = lookup_tid(t, tid);1361 if (unlikely(!csk)) {1362 pr_err("can't find conn. for tid %u.\n", tid);1363 goto rel_skb;1364 }1365 1366 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1367 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",1368 csk, csk->state, csk->flags, csk->tid, skb,1369 skb->len, pdu_len_ddp);1370 1371 spin_lock_bh(&csk->lock);1372 1373 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {1374 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1375 "csk 0x%p,%u,0x%lx,%u, bad state.\n",1376 csk, csk->state, csk->flags, csk->tid);1377 1378 if (csk->state != CTP_ABORTING)1379 goto abort_conn;1380 else1381 goto discard;1382 }1383 1384 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);1385 cxgbi_skcb_flags(skb) = 0;1386 1387 skb_reset_transport_header(skb);1388 __skb_pull(skb, sizeof(*cpl));1389 __pskb_trim(skb, ntohs(cpl->len));1390 1391 if (!csk->skb_ulp_lhdr)1392 csk->skb_ulp_lhdr = skb;1393 1394 lskb = csk->skb_ulp_lhdr;1395 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);1396 1397 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1398 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",1399 csk, csk->state, csk->flags, skb, lskb);1400 1401 __skb_queue_tail(&csk->receive_queue, skb);1402 spin_unlock_bh(&csk->lock);1403 return;1404 1405abort_conn:1406 send_abort_req(csk);1407discard:1408 spin_unlock_bh(&csk->lock);1409rel_skb:1410 __kfree_skb(skb);1411}1412 1413static void1414cxgb4i_process_ddpvld(struct cxgbi_sock *csk,1415 struct sk_buff *skb, u32 ddpvld)1416{1417 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {1418 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",1419 csk, skb, ddpvld, cxgbi_skcb_flags(skb));1420 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);1421 }1422 1423 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {1424 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",1425 csk, skb, ddpvld, cxgbi_skcb_flags(skb));1426 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);1427 }1428 1429 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {1430 log_debug(1 << CXGBI_DBG_PDU_RX,1431 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",1432 csk, skb, ddpvld);1433 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);1434 }1435 1436 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&1437 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {1438 log_debug(1 << CXGBI_DBG_PDU_RX,1439 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",1440 csk, skb, ddpvld);1441 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);1442 }1443}1444 1445static void do_rx_data_ddp(struct cxgbi_device *cdev,1446 struct sk_buff *skb)1447{1448 struct cxgbi_sock *csk;1449 struct sk_buff *lskb;1450 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;1451 unsigned int tid = GET_TID(rpl);1452 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1453 struct tid_info *t = lldi->tids;1454 u32 ddpvld = be32_to_cpu(rpl->ddpvld);1455 1456 csk = lookup_tid(t, tid);1457 if (unlikely(!csk)) {1458 pr_err("can't find connection for tid %u.\n", tid);1459 goto rel_skb;1460 }1461 1462 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1463 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",1464 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);1465 1466 spin_lock_bh(&csk->lock);1467 1468 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {1469 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1470 "csk 0x%p,%u,0x%lx,%u, bad state.\n",1471 csk, csk->state, csk->flags, csk->tid);1472 if (csk->state != CTP_ABORTING)1473 goto abort_conn;1474 else1475 goto discard;1476 }1477 1478 if (!csk->skb_ulp_lhdr) {1479 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);1480 goto abort_conn;1481 }1482 1483 lskb = csk->skb_ulp_lhdr;1484 csk->skb_ulp_lhdr = NULL;1485 1486 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);1487 1488 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))1489 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",1490 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));1491 1492 cxgb4i_process_ddpvld(csk, lskb, ddpvld);1493 1494 log_debug(1 << CXGBI_DBG_PDU_RX,1495 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",1496 csk, lskb, cxgbi_skcb_flags(lskb));1497 1498 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);1499 cxgbi_conn_pdu_ready(csk);1500 spin_unlock_bh(&csk->lock);1501 goto rel_skb;1502 1503abort_conn:1504 send_abort_req(csk);1505discard:1506 spin_unlock_bh(&csk->lock);1507rel_skb:1508 __kfree_skb(skb);1509}1510 1511static void1512do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)1513{1514 struct cxgbi_sock *csk;1515 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;1516 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1517 struct tid_info *t = lldi->tids;1518 struct sk_buff *data_skb = NULL;1519 u32 tid = GET_TID(rpl);1520 u32 ddpvld = be32_to_cpu(rpl->ddpvld);1521 u32 seq = be32_to_cpu(rpl->seq);1522 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);1523 1524 csk = lookup_tid(t, tid);1525 if (unlikely(!csk)) {1526 pr_err("can't find connection for tid %u.\n", tid);1527 goto rel_skb;1528 }1529 1530 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,1531 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "1532 "pdu_len_ddp %u, status %u.\n",1533 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,1534 ntohs(rpl->len), pdu_len_ddp, rpl->status);1535 1536 spin_lock_bh(&csk->lock);1537 1538 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {1539 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1540 "csk 0x%p,%u,0x%lx,%u, bad state.\n",1541 csk, csk->state, csk->flags, csk->tid);1542 1543 if (csk->state != CTP_ABORTING)1544 goto abort_conn;1545 else1546 goto discard;1547 }1548 1549 cxgbi_skcb_tcp_seq(skb) = seq;1550 cxgbi_skcb_flags(skb) = 0;1551 cxgbi_skcb_rx_pdulen(skb) = 0;1552 1553 skb_reset_transport_header(skb);1554 __skb_pull(skb, sizeof(*rpl));1555 __pskb_trim(skb, be16_to_cpu(rpl->len));1556 1557 csk->rcv_nxt = seq + pdu_len_ddp;1558 1559 if (csk->skb_ulp_lhdr) {1560 data_skb = skb_peek(&csk->receive_queue);1561 if (!data_skb ||1562 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {1563 pr_err("Error! freelist data not found 0x%p, tid %u\n",1564 data_skb, tid);1565 1566 goto abort_conn;1567 }1568 __skb_unlink(data_skb, &csk->receive_queue);1569 1570 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);1571 1572 __skb_queue_tail(&csk->receive_queue, skb);1573 __skb_queue_tail(&csk->receive_queue, data_skb);1574 } else {1575 __skb_queue_tail(&csk->receive_queue, skb);1576 }1577 1578 csk->skb_ulp_lhdr = NULL;1579 1580 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);1581 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);1582 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);1583 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);1584 1585 cxgb4i_process_ddpvld(csk, skb, ddpvld);1586 1587 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",1588 csk, skb, cxgbi_skcb_flags(skb));1589 1590 cxgbi_conn_pdu_ready(csk);1591 spin_unlock_bh(&csk->lock);1592 1593 return;1594 1595abort_conn:1596 send_abort_req(csk);1597discard:1598 spin_unlock_bh(&csk->lock);1599rel_skb:1600 __kfree_skb(skb);1601}1602 1603static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)1604{1605 struct cxgbi_sock *csk;1606 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;1607 unsigned int tid = GET_TID(rpl);1608 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1609 struct tid_info *t = lldi->tids;1610 1611 csk = lookup_tid(t, tid);1612 if (unlikely(!csk))1613 pr_err("can't find connection for tid %u.\n", tid);1614 else {1615 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1616 "csk 0x%p,%u,0x%lx,%u.\n",1617 csk, csk->state, csk->flags, csk->tid);1618 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),1619 rpl->seq_vld);1620 }1621 __kfree_skb(skb);1622}1623 1624static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)1625{1626 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;1627 unsigned int tid = GET_TID(rpl);1628 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1629 struct tid_info *t = lldi->tids;1630 struct cxgbi_sock *csk;1631 1632 csk = lookup_tid(t, tid);1633 if (!csk) {1634 pr_err("can't find conn. for tid %u.\n", tid);1635 return;1636 }1637 1638 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1639 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",1640 csk, csk->state, csk->flags, csk->tid, rpl->status);1641 1642 if (rpl->status != CPL_ERR_NONE) {1643 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",1644 csk, tid, rpl->status);1645 csk->err = -EINVAL;1646 }1647 1648 complete(&csk->cmpl);1649 1650 __kfree_skb(skb);1651}1652 1653static int alloc_cpls(struct cxgbi_sock *csk)1654{1655 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),1656 0, GFP_KERNEL);1657 if (!csk->cpl_close)1658 return -ENOMEM;1659 1660 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),1661 0, GFP_KERNEL);1662 if (!csk->cpl_abort_req)1663 goto free_cpls;1664 1665 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),1666 0, GFP_KERNEL);1667 if (!csk->cpl_abort_rpl)1668 goto free_cpls;1669 return 0;1670 1671free_cpls:1672 cxgbi_sock_free_cpl_skbs(csk);1673 return -ENOMEM;1674}1675 1676static inline void l2t_put(struct cxgbi_sock *csk)1677{1678 if (csk->l2t) {1679 cxgb4_l2t_release(csk->l2t);1680 csk->l2t = NULL;1681 cxgbi_sock_put(csk);1682 }1683}1684 1685static void release_offload_resources(struct cxgbi_sock *csk)1686{1687 struct cxgb4_lld_info *lldi;1688#if IS_ENABLED(CONFIG_IPV6)1689 struct net_device *ndev = csk->cdev->ports[csk->port_id];1690#endif1691 1692 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1693 "csk 0x%p,%u,0x%lx,%u.\n",1694 csk, csk->state, csk->flags, csk->tid);1695 1696 cxgbi_sock_free_cpl_skbs(csk);1697 cxgbi_sock_purge_write_queue(csk);1698 if (csk->wr_cred != csk->wr_max_cred) {1699 cxgbi_sock_purge_wr_queue(csk);1700 cxgbi_sock_reset_wr_list(csk);1701 }1702 1703 l2t_put(csk);1704#if IS_ENABLED(CONFIG_IPV6)1705 if (csk->csk_family == AF_INET6)1706 cxgb4_clip_release(ndev,1707 (const u32 *)&csk->saddr6.sin6_addr, 1);1708#endif1709 1710 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))1711 free_atid(csk);1712 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {1713 lldi = cxgbi_cdev_priv(csk->cdev);1714 cxgb4_remove_tid(lldi->tids, 0, csk->tid,1715 csk->csk_family);1716 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);1717 cxgbi_sock_put(csk);1718 }1719 csk->dst = NULL;1720}1721 1722#ifdef CONFIG_CHELSIO_T4_DCB1723static inline u8 get_iscsi_dcb_state(struct net_device *ndev)1724{1725 return ndev->dcbnl_ops->getstate(ndev);1726}1727 1728static int select_priority(int pri_mask)1729{1730 if (!pri_mask)1731 return 0;1732 return (ffs(pri_mask) - 1);1733}1734 1735static u8 get_iscsi_dcb_priority(struct net_device *ndev)1736{1737 int rv;1738 u8 caps;1739 1740 struct dcb_app iscsi_dcb_app = {1741 .protocol = 32601742 };1743 1744 rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);1745 if (rv)1746 return 0;1747 1748 if (caps & DCB_CAP_DCBX_VER_IEEE) {1749 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_STREAM;1750 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);1751 if (!rv) {1752 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;1753 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);1754 }1755 } else if (caps & DCB_CAP_DCBX_VER_CEE) {1756 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;1757 rv = dcb_getapp(ndev, &iscsi_dcb_app);1758 }1759 1760 log_debug(1 << CXGBI_DBG_ISCSI,1761 "iSCSI priority is set to %u\n", select_priority(rv));1762 return select_priority(rv);1763}1764#endif1765 1766static int init_act_open(struct cxgbi_sock *csk)1767{1768 struct cxgbi_device *cdev = csk->cdev;1769 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1770 struct net_device *ndev = cdev->ports[csk->port_id];1771 struct sk_buff *skb = NULL;1772 struct neighbour *n = NULL;1773 void *daddr;1774 unsigned int step;1775 unsigned int rxq_idx;1776 unsigned int size, size6;1777 unsigned int linkspeed;1778 unsigned int rcv_winf, snd_winf;1779#ifdef CONFIG_CHELSIO_T4_DCB1780 u8 priority = 0;1781#endif1782 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,1783 "csk 0x%p,%u,0x%lx,%u.\n",1784 csk, csk->state, csk->flags, csk->tid);1785 1786 if (csk->csk_family == AF_INET)1787 daddr = &csk->daddr.sin_addr.s_addr;1788#if IS_ENABLED(CONFIG_IPV6)1789 else if (csk->csk_family == AF_INET6)1790 daddr = &csk->daddr6.sin6_addr;1791#endif1792 else {1793 pr_err("address family 0x%x not supported\n", csk->csk_family);1794 goto rel_resource;1795 }1796 1797 n = dst_neigh_lookup(csk->dst, daddr);1798 1799 if (!n) {1800 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);1801 goto rel_resource;1802 }1803 1804 if (!(n->nud_state & NUD_VALID))1805 neigh_event_send(n, NULL);1806 1807 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);1808 if (csk->atid < 0) {1809 pr_err("%s, NO atid available.\n", ndev->name);1810 goto rel_resource_without_clip;1811 }1812 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);1813 cxgbi_sock_get(csk);1814 1815#ifdef CONFIG_CHELSIO_T4_DCB1816 if (get_iscsi_dcb_state(ndev))1817 priority = get_iscsi_dcb_priority(ndev);1818 1819 csk->dcb_priority = priority;1820 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority);1821#else1822 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);1823#endif1824 if (!csk->l2t) {1825 pr_err("%s, cannot alloc l2t.\n", ndev->name);1826 goto rel_resource_without_clip;1827 }1828 cxgbi_sock_get(csk);1829 1830#if IS_ENABLED(CONFIG_IPV6)1831 if (csk->csk_family == AF_INET6)1832 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);1833#endif1834 1835 if (is_t4(lldi->adapter_type)) {1836 size = sizeof(struct cpl_act_open_req);1837 size6 = sizeof(struct cpl_act_open_req6);1838 } else if (is_t5(lldi->adapter_type)) {1839 size = sizeof(struct cpl_t5_act_open_req);1840 size6 = sizeof(struct cpl_t5_act_open_req6);1841 } else {1842 size = sizeof(struct cpl_t6_act_open_req);1843 size6 = sizeof(struct cpl_t6_act_open_req6);1844 }1845 1846 if (csk->csk_family == AF_INET)1847 skb = alloc_wr(size, 0, GFP_NOIO);1848#if IS_ENABLED(CONFIG_IPV6)1849 else1850 skb = alloc_wr(size6, 0, GFP_NOIO);1851#endif1852 1853 if (!skb)1854 goto rel_resource;1855 skb->sk = (struct sock *)csk;1856 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);1857 1858 if (!csk->mtu)1859 csk->mtu = dst_mtu(csk->dst);1860 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);1861 csk->tx_chan = cxgb4_port_chan(ndev);1862 csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;1863 step = lldi->ntxq / lldi->nchan;1864 csk->txq_idx = cxgb4_port_idx(ndev) * step;1865 step = lldi->nrxq / lldi->nchan;1866 rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);1867 cdev->rxq_idx_cntr++;1868 csk->rss_qid = lldi->rxq_ids[rxq_idx];1869 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;1870 csk->snd_win = cxgb4i_snd_win;1871 csk->rcv_win = cxgb4i_rcv_win;1872 if (cxgb4i_rcv_win <= 0) {1873 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;1874 rcv_winf = linkspeed / SPEED_10000;1875 if (rcv_winf)1876 csk->rcv_win *= rcv_winf;1877 }1878 if (cxgb4i_snd_win <= 0) {1879 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;1880 snd_winf = linkspeed / SPEED_10000;1881 if (snd_winf)1882 csk->snd_win *= snd_winf;1883 }1884 csk->wr_cred = lldi->wr_cred -1885 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);1886 csk->wr_max_cred = csk->wr_cred;1887 csk->wr_una_cred = 0;1888 cxgbi_sock_reset_wr_list(csk);1889 csk->err = 0;1890 1891 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",1892 (&csk->saddr), (&csk->daddr), csk, csk->state,1893 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,1894 csk->mtu, csk->mss_idx, csk->smac_idx);1895 1896 /* must wait for either a act_open_rpl or act_open_establish */1897 if (!try_module_get(cdev->owner)) {1898 pr_err("%s, try_module_get failed.\n", ndev->name);1899 goto rel_resource;1900 }1901 1902 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);1903 if (csk->csk_family == AF_INET)1904 send_act_open_req(csk, skb, csk->l2t);1905#if IS_ENABLED(CONFIG_IPV6)1906 else1907 send_act_open_req6(csk, skb, csk->l2t);1908#endif1909 neigh_release(n);1910 1911 return 0;1912 1913rel_resource:1914#if IS_ENABLED(CONFIG_IPV6)1915 if (csk->csk_family == AF_INET6)1916 cxgb4_clip_release(ndev,1917 (const u32 *)&csk->saddr6.sin6_addr, 1);1918#endif1919rel_resource_without_clip:1920 if (n)1921 neigh_release(n);1922 if (skb)1923 __kfree_skb(skb);1924 return -EINVAL;1925}1926 1927static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {1928 [CPL_ACT_ESTABLISH] = do_act_establish,1929 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,1930 [CPL_PEER_CLOSE] = do_peer_close,1931 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,1932 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,1933 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,1934 [CPL_FW4_ACK] = do_fw4_ack,1935 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,1936 [CPL_ISCSI_DATA] = do_rx_iscsi_data,1937 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,1938 [CPL_RX_DATA_DDP] = do_rx_data_ddp,1939 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,1940 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,1941 [CPL_RX_DATA] = do_rx_data,1942};1943 1944static int cxgb4i_ofld_init(struct cxgbi_device *cdev)1945{1946 int rc;1947 1948 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)1949 cxgb4i_max_connect = CXGB4I_MAX_CONN;1950 1951 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,1952 cxgb4i_max_connect);1953 if (rc < 0)1954 return rc;1955 1956 cdev->csk_release_offload_resources = release_offload_resources;1957 cdev->csk_push_tx_frames = push_tx_frames;1958 cdev->csk_send_abort_req = send_abort_req;1959 cdev->csk_send_close_req = send_close_req;1960 cdev->csk_send_rx_credits = send_rx_credits;1961 cdev->csk_alloc_cpls = alloc_cpls;1962 cdev->csk_init_act_open = init_act_open;1963 1964 pr_info("cdev 0x%p, offload up, added.\n", cdev);1965 return 0;1966}1967 1968static inline void1969ulp_mem_io_set_hdr(struct cxgbi_device *cdev,1970 struct ulp_mem_io *req,1971 unsigned int wr_len, unsigned int dlen,1972 unsigned int pm_addr,1973 int tid)1974{1975 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);1976 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);1977 1978 INIT_ULPTX_WR(req, wr_len, 0, tid);1979 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |1980 FW_WR_ATOMIC_V(0));1981 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |1982 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |1983 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));1984 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));1985 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));1986 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));1987 1988 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));1989 idata->len = htonl(dlen);1990}1991 1992static struct sk_buff *1993ddp_ppod_init_idata(struct cxgbi_device *cdev,1994 struct cxgbi_ppm *ppm,1995 unsigned int idx, unsigned int npods,1996 unsigned int tid)1997{1998 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;1999 unsigned int dlen = npods << PPOD_SIZE_SHIFT;2000 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +2001 sizeof(struct ulptx_idata) + dlen, 16);2002 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);2003 2004 if (!skb) {2005 pr_err("%s: %s idx %u, npods %u, OOM.\n",2006 __func__, ppm->ndev->name, idx, npods);2007 return NULL;2008 }2009 2010 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,2011 pm_addr, tid);2012 2013 return skb;2014}2015 2016static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,2017 struct cxgbi_task_tag_info *ttinfo,2018 unsigned int idx, unsigned int npods,2019 struct scatterlist **sg_pp,2020 unsigned int *sg_off)2021{2022 struct cxgbi_device *cdev = csk->cdev;2023 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,2024 csk->tid);2025 struct ulp_mem_io *req;2026 struct ulptx_idata *idata;2027 struct cxgbi_pagepod *ppod;2028 int i;2029 2030 if (!skb)2031 return -ENOMEM;2032 2033 req = (struct ulp_mem_io *)skb->head;2034 idata = (struct ulptx_idata *)(req + 1);2035 ppod = (struct cxgbi_pagepod *)(idata + 1);2036 2037 for (i = 0; i < npods; i++, ppod++)2038 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);2039 2040 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);2041 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);2042 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);2043 2044 spin_lock_bh(&csk->lock);2045 cxgbi_sock_skb_entail(csk, skb);2046 spin_unlock_bh(&csk->lock);2047 2048 return 0;2049}2050 2051static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,2052 struct cxgbi_task_tag_info *ttinfo)2053{2054 unsigned int pidx = ttinfo->idx;2055 unsigned int npods = ttinfo->npods;2056 unsigned int i, cnt;2057 int err = 0;2058 struct scatterlist *sg = ttinfo->sgl;2059 unsigned int offset = 0;2060 2061 ttinfo->cid = csk->port_id;2062 2063 for (i = 0; i < npods; i += cnt, pidx += cnt) {2064 cnt = npods - i;2065 2066 if (cnt > ULPMEM_IDATA_MAX_NPPODS)2067 cnt = ULPMEM_IDATA_MAX_NPPODS;2068 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,2069 &sg, &offset);2070 if (err < 0)2071 break;2072 }2073 2074 return err;2075}2076 2077static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,2078 int pg_idx)2079{2080 struct sk_buff *skb;2081 struct cpl_set_tcb_field *req;2082 2083 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)2084 return 0;2085 2086 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);2087 if (!skb)2088 return -ENOMEM;2089 2090 /* set up ulp page size */2091 req = (struct cpl_set_tcb_field *)skb->head;2092 INIT_TP_WR(req, csk->tid);2093 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));2094 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));2095 req->word_cookie = htons(0);2096 req->mask = cpu_to_be64(0x3 << 8);2097 req->val = cpu_to_be64(pg_idx << 8);2098 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);2099 2100 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,2101 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);2102 2103 reinit_completion(&csk->cmpl);2104 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);2105 wait_for_completion(&csk->cmpl);2106 2107 return csk->err;2108}2109 2110static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,2111 int hcrc, int dcrc)2112{2113 struct sk_buff *skb;2114 struct cpl_set_tcb_field *req;2115 2116 if (!hcrc && !dcrc)2117 return 0;2118 2119 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);2120 if (!skb)2121 return -ENOMEM;2122 2123 csk->hcrc_len = (hcrc ? 4 : 0);2124 csk->dcrc_len = (dcrc ? 4 : 0);2125 /* set up ulp submode */2126 req = (struct cpl_set_tcb_field *)skb->head;2127 INIT_TP_WR(req, tid);2128 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));2129 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));2130 req->word_cookie = htons(0);2131 req->mask = cpu_to_be64(0x3 << 4);2132 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |2133 (dcrc ? ULP_CRC_DATA : 0)) << 4);2134 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);2135 2136 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,2137 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);2138 2139 reinit_completion(&csk->cmpl);2140 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);2141 wait_for_completion(&csk->cmpl);2142 2143 return csk->err;2144}2145 2146static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)2147{2148 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)2149 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);2150}2151 2152static int cxgb4i_ddp_init(struct cxgbi_device *cdev)2153{2154 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);2155 struct net_device *ndev = cdev->ports[0];2156 struct cxgbi_tag_format tformat;2157 int i, err;2158 2159 if (!lldi->vr->iscsi.size) {2160 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);2161 return -EACCES;2162 }2163 2164 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;2165 2166 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));2167 for (i = 0; i < 4; i++)2168 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))2169 & 0xF;2170 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);2171 2172 pr_info("iscsi_edram.start 0x%x iscsi_edram.size 0x%x",2173 lldi->vr->ppod_edram.start, lldi->vr->ppod_edram.size);2174 2175 err = cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat,2176 lldi->vr->iscsi.size, lldi->iscsi_llimit,2177 lldi->vr->iscsi.start, 2,2178 lldi->vr->ppod_edram.start,2179 lldi->vr->ppod_edram.size);2180 2181 if (err < 0)2182 return err;2183 2184 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;2185 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;2186 cdev->csk_ddp_set_map = ddp_set_map;2187 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,2188 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);2189 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,2190 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);2191 cdev->cdev2ppm = cdev2ppm;2192 2193 return 0;2194}2195 2196static bool is_memfree(struct adapter *adap)2197{2198 u32 io;2199 2200 io = t4_read_reg(adap, MA_TARGET_MEM_ENABLE_A);2201 if (is_t5(adap->params.chip)) {2202 if ((io & EXT_MEM0_ENABLE_F) || (io & EXT_MEM1_ENABLE_F))2203 return false;2204 } else if (io & EXT_MEM_ENABLE_F) {2205 return false;2206 }2207 2208 return true;2209}2210 2211static void *t4_uld_add(const struct cxgb4_lld_info *lldi)2212{2213 struct cxgbi_device *cdev;2214 struct port_info *pi;2215 struct net_device *ndev;2216 struct adapter *adap;2217 struct tid_info *t;2218 u32 max_cmds = CXGB4I_SCSI_HOST_QDEPTH;2219 u32 max_conn = CXGBI_MAX_CONN;2220 int i, rc;2221 2222 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);2223 if (!cdev) {2224 pr_info("t4 device 0x%p, register failed.\n", lldi);2225 return NULL;2226 }2227 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",2228 cdev, lldi->adapter_type, lldi->nports,2229 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,2230 lldi->nrxq, lldi->wr_cred);2231 for (i = 0; i < lldi->nrxq; i++)2232 log_debug(1 << CXGBI_DBG_DEV,2233 "t4 0x%p, rxq id #%d: %u.\n",2234 cdev, i, lldi->rxq_ids[i]);2235 2236 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));2237 cdev->flags = CXGBI_FLAG_DEV_T4;2238 cdev->pdev = lldi->pdev;2239 cdev->ports = lldi->ports;2240 cdev->nports = lldi->nports;2241 cdev->mtus = lldi->mtus;2242 cdev->nmtus = NMTUS;2243 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=2244 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;2245 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;2246 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);2247 cdev->itp = &cxgb4i_iscsi_transport;2248 cdev->owner = THIS_MODULE;2249 2250 cdev->pfvf = FW_PFVF_CMD_PFN_V(lldi->pf);2251 pr_info("cdev 0x%p,%s, pfvf %u.\n",2252 cdev, lldi->ports[0]->name, cdev->pfvf);2253 2254 rc = cxgb4i_ddp_init(cdev);2255 if (rc) {2256 pr_info("t4 0x%p ddp init failed %d.\n", cdev, rc);2257 goto err_out;2258 }2259 2260 ndev = cdev->ports[0];2261 adap = netdev2adap(ndev);2262 if (adap) {2263 t = &adap->tids;2264 if (t->ntids <= CXGBI_MAX_CONN)2265 max_conn = t->ntids;2266 2267 if (is_memfree(adap)) {2268 cdev->flags |= CXGBI_FLAG_DEV_ISO_OFF;2269 max_cmds = CXGB4I_SCSI_HOST_QDEPTH >> 2;2270 2271 pr_info("%s: 0x%p, tid %u, SO adapter.\n",2272 ndev->name, cdev, t->ntids);2273 }2274 } else {2275 pr_info("%s, 0x%p, NO adapter struct.\n", ndev->name, cdev);2276 }2277 2278 /* ISO is enabled in T5/T6 firmware version >= 1.13.43.0 */2279 if (!is_t4(lldi->adapter_type) &&2280 (lldi->fw_vers >= 0x10d2b00) &&2281 !(cdev->flags & CXGBI_FLAG_DEV_ISO_OFF))2282 cdev->skb_iso_txhdr = sizeof(struct cpl_tx_data_iso);2283 2284 rc = cxgb4i_ofld_init(cdev);2285 if (rc) {2286 pr_info("t4 0x%p ofld init failed.\n", cdev);2287 goto err_out;2288 }2289 2290 cxgb4i_host_template.can_queue = max_cmds;2291 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, max_conn,2292 &cxgb4i_host_template, cxgb4i_stt);2293 if (rc)2294 goto err_out;2295 2296 for (i = 0; i < cdev->nports; i++) {2297 pi = netdev_priv(lldi->ports[i]);2298 cdev->hbas[i]->port_id = pi->port_id;2299 }2300 return cdev;2301 2302err_out:2303 cxgbi_device_unregister(cdev);2304 return ERR_PTR(-ENOMEM);2305}2306 2307#define RX_PULL_LEN 1282308static int t4_uld_rx_handler(void *handle, const __be64 *rsp,2309 const struct pkt_gl *pgl)2310{2311 const struct cpl_act_establish *rpl;2312 struct sk_buff *skb;2313 unsigned int opc;2314 struct cxgbi_device *cdev = handle;2315 2316 if (pgl == NULL) {2317 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;2318 2319 skb = alloc_wr(len, 0, GFP_ATOMIC);2320 if (!skb)2321 goto nomem;2322 skb_copy_to_linear_data(skb, &rsp[1], len);2323 } else {2324 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {2325 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",2326 pgl->va, be64_to_cpu(*rsp),2327 be64_to_cpu(*(u64 *)pgl->va),2328 pgl->tot_len);2329 return 0;2330 }2331 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);2332 if (unlikely(!skb))2333 goto nomem;2334 }2335 2336 rpl = (struct cpl_act_establish *)skb->data;2337 opc = rpl->ot.opcode;2338 log_debug(1 << CXGBI_DBG_TOE,2339 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",2340 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);2341 if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {2342 pr_err("No handler for opcode 0x%x.\n", opc);2343 __kfree_skb(skb);2344 } else2345 cxgb4i_cplhandlers[opc](cdev, skb);2346 2347 return 0;2348nomem:2349 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");2350 return 1;2351}2352 2353static int t4_uld_state_change(void *handle, enum cxgb4_state state)2354{2355 struct cxgbi_device *cdev = handle;2356 2357 switch (state) {2358 case CXGB4_STATE_UP:2359 pr_info("cdev 0x%p, UP.\n", cdev);2360 break;2361 case CXGB4_STATE_START_RECOVERY:2362 pr_info("cdev 0x%p, RECOVERY.\n", cdev);2363 /* close all connections */2364 break;2365 case CXGB4_STATE_DOWN:2366 pr_info("cdev 0x%p, DOWN.\n", cdev);2367 break;2368 case CXGB4_STATE_DETACH:2369 pr_info("cdev 0x%p, DETACH.\n", cdev);2370 cxgbi_device_unregister(cdev);2371 break;2372 default:2373 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);2374 break;2375 }2376 return 0;2377}2378 2379#ifdef CONFIG_CHELSIO_T4_DCB2380static int2381cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val,2382 void *data)2383{2384 int i, port = 0xFF;2385 struct net_device *ndev;2386 struct cxgbi_device *cdev = NULL;2387 struct dcb_app_type *iscsi_app = data;2388 struct cxgbi_ports_map *pmap;2389 u8 priority;2390 2391 if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {2392 if ((iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_STREAM) &&2393 (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY))2394 return NOTIFY_DONE;2395 2396 priority = iscsi_app->app.priority;2397 } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {2398 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)2399 return NOTIFY_DONE;2400 2401 if (!iscsi_app->app.priority)2402 return NOTIFY_DONE;2403 2404 priority = ffs(iscsi_app->app.priority) - 1;2405 } else {2406 return NOTIFY_DONE;2407 }2408 2409 if (iscsi_app->app.protocol != 3260)2410 return NOTIFY_DONE;2411 2412 log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n",2413 iscsi_app->ifindex, priority);2414 2415 ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);2416 if (!ndev)2417 return NOTIFY_DONE;2418 2419 cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port);2420 2421 dev_put(ndev);2422 if (!cdev)2423 return NOTIFY_DONE;2424 2425 pmap = &cdev->pmap;2426 2427 for (i = 0; i < pmap->used; i++) {2428 if (pmap->port_csk[i]) {2429 struct cxgbi_sock *csk = pmap->port_csk[i];2430 2431 if (csk->dcb_priority != priority) {2432 iscsi_conn_failure(csk->user_data,2433 ISCSI_ERR_CONN_FAILED);2434 pr_info("Restarting iSCSI connection %p with "2435 "priority %u->%u.\n", csk,2436 csk->dcb_priority, priority);2437 }2438 }2439 }2440 return NOTIFY_OK;2441}2442#endif2443 2444static int __init cxgb4i_init_module(void)2445{2446 int rc;2447 2448 printk(KERN_INFO "%s", version);2449 2450 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);2451 if (rc < 0)2452 return rc;2453 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);2454 2455#ifdef CONFIG_CHELSIO_T4_DCB2456 pr_info("%s dcb enabled.\n", DRV_MODULE_NAME);2457 register_dcbevent_notifier(&cxgb4_dcb_change);2458#endif2459 return 0;2460}2461 2462static void __exit cxgb4i_exit_module(void)2463{2464#ifdef CONFIG_CHELSIO_T4_DCB2465 unregister_dcbevent_notifier(&cxgb4_dcb_change);2466#endif2467 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);2468 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);2469 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);2470}2471 2472module_init(cxgb4i_init_module);2473module_exit(cxgb4i_exit_module);2474