2 * cxgb4i.c: Chelsio T4 iSCSI driver.
4 * Copyright (c) 2010 Chelsio Communications, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Rakesh Ranjan (rranjan@chelsio.com)
14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <scsi/scsi_host.h>
21 #include <linux/netdevice.h>
22 #include <net/addrconf.h>
27 #include "cxgb4_uld.h"
32 static unsigned int dbg_level;
34 #include "../libcxgbi.h"
36 #define DRV_MODULE_NAME "cxgb4i"
37 #define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
38 #define DRV_MODULE_VERSION "0.9.4"
40 static char version[] =
41 DRV_MODULE_DESC " " DRV_MODULE_NAME
42 " v" DRV_MODULE_VERSION "\n";
44 MODULE_AUTHOR("Chelsio Communications, Inc.");
45 MODULE_DESCRIPTION(DRV_MODULE_DESC);
46 MODULE_VERSION(DRV_MODULE_VERSION);
47 MODULE_LICENSE("GPL");
49 module_param(dbg_level, uint, 0644);
50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
52 static int cxgb4i_rcv_win = 256 * 1024;
53 module_param(cxgb4i_rcv_win, int, 0644);
54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
56 static int cxgb4i_snd_win = 128 * 1024;
57 module_param(cxgb4i_snd_win, int, 0644);
58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
60 static int cxgb4i_rx_credit_thres = 10 * 1024;
61 module_param(cxgb4i_rx_credit_thres, int, 0644);
62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
63 "RX credits return threshold in bytes (default=10KB)");
65 static unsigned int cxgb4i_max_connect = (8 * 1024);
66 module_param(cxgb4i_max_connect, uint, 0644);
67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
69 static unsigned short cxgb4i_sport_base = 20000;
70 module_param(cxgb4i_sport_base, ushort, 0644);
71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
75 static void *t4_uld_add(const struct cxgb4_lld_info *);
76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
77 static int t4_uld_state_change(void *, enum cxgb4_state state);
79 static const struct cxgb4_uld_info cxgb4i_uld_info = {
80 .name = DRV_MODULE_NAME,
82 .rx_handler = t4_uld_rx_handler,
83 .state_change = t4_uld_state_change,
86 static struct scsi_host_template cxgb4i_host_template = {
87 .module = THIS_MODULE,
88 .name = DRV_MODULE_NAME,
89 .proc_name = DRV_MODULE_NAME,
90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
91 .queuecommand = iscsi_queuecommand,
92 .change_queue_depth = iscsi_change_queue_depth,
93 .sg_tablesize = SG_ALL,
94 .max_sectors = 0xFFFF,
95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
96 .eh_abort_handler = iscsi_eh_abort,
97 .eh_device_reset_handler = iscsi_eh_device_reset,
98 .eh_target_reset_handler = iscsi_eh_recover_target,
99 .target_alloc = iscsi_target_alloc,
100 .use_clustering = DISABLE_CLUSTERING,
102 .track_queue_depth = 1,
105 static struct iscsi_transport cxgb4i_iscsi_transport = {
106 .owner = THIS_MODULE,
107 .name = DRV_MODULE_NAME,
108 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
109 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
110 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
111 .attr_is_visible = cxgbi_attr_is_visible,
112 .get_host_param = cxgbi_get_host_param,
113 .set_host_param = cxgbi_set_host_param,
114 /* session management */
115 .create_session = cxgbi_create_session,
116 .destroy_session = cxgbi_destroy_session,
117 .get_session_param = iscsi_session_get_param,
118 /* connection management */
119 .create_conn = cxgbi_create_conn,
120 .bind_conn = cxgbi_bind_conn,
121 .destroy_conn = iscsi_tcp_conn_teardown,
122 .start_conn = iscsi_conn_start,
123 .stop_conn = iscsi_conn_stop,
124 .get_conn_param = iscsi_conn_get_param,
125 .set_param = cxgbi_set_conn_param,
126 .get_stats = cxgbi_get_conn_stats,
127 /* pdu xmit req from user space */
128 .send_pdu = iscsi_conn_send_pdu,
130 .init_task = iscsi_tcp_task_init,
131 .xmit_task = iscsi_tcp_task_xmit,
132 .cleanup_task = cxgbi_cleanup_task,
134 .alloc_pdu = cxgbi_conn_alloc_pdu,
135 .init_pdu = cxgbi_conn_init_pdu,
136 .xmit_pdu = cxgbi_conn_xmit_pdu,
137 .parse_pdu_itt = cxgbi_parse_pdu_itt,
138 /* TCP connect/disconnect */
139 .get_ep_param = cxgbi_get_ep_param,
140 .ep_connect = cxgbi_ep_connect,
141 .ep_poll = cxgbi_ep_poll,
142 .ep_disconnect = cxgbi_ep_disconnect,
143 /* Error recovery timeout call */
144 .session_recovery_timedout = iscsi_session_recovery_timedout,
147 static struct scsi_transport_template *cxgb4i_stt;
150 * CPL (Chelsio Protocol Language) defines a message passing interface between
151 * the host driver and Chelsio asic.
152 * The section below implments CPLs that related to iscsi tcp connection
153 * open/close/abort and data send/receive.
156 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
157 #define RCV_BUFSIZ_MASK 0x3FFU
158 #define MAX_IMM_TX_PKT_LEN 128
160 static inline void set_queue(struct sk_buff *skb, unsigned int queue,
161 const struct cxgbi_sock *csk)
163 skb->queue_mapping = queue;
166 static int push_tx_frames(struct cxgbi_sock *, int);
169 * is_ofld_imm - check whether a packet can be sent as immediate data
172 * Returns true if a packet can be sent as an offload WR with immediate
173 * data. We currently use the same limit as for Ethernet packets.
175 static inline int is_ofld_imm(const struct sk_buff *skb)
177 return skb->len <= (MAX_IMM_TX_PKT_LEN -
178 sizeof(struct fw_ofld_tx_data_wr));
181 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
184 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
185 int t4 = is_t4(lldi->adapter_type);
186 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
187 unsigned long long opt0;
189 unsigned int qid_atid = ((unsigned int)csk->atid) |
190 (((unsigned int)csk->rss_qid) << 14);
192 opt0 = KEEP_ALIVE(1) |
194 MSS_IDX(csk->mss_idx) |
195 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
196 TX_CHAN(csk->tx_chan) |
197 SMAC_SEL(csk->smac_idx) |
198 ULP_MODE(ULP_MODE_ISCSI) |
199 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
200 opt2 = RX_CHANNEL(0) |
203 RSS_QUEUE(csk->rss_qid);
205 if (is_t4(lldi->adapter_type)) {
206 struct cpl_act_open_req *req =
207 (struct cpl_act_open_req *)skb->head;
210 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
212 req->local_port = csk->saddr.sin_port;
213 req->peer_port = csk->daddr.sin_port;
214 req->local_ip = csk->saddr.sin_addr.s_addr;
215 req->peer_ip = csk->daddr.sin_addr.s_addr;
216 req->opt0 = cpu_to_be64(opt0);
217 req->params = cpu_to_be32(cxgb4_select_ntuple(
218 csk->cdev->ports[csk->port_id],
221 req->opt2 = cpu_to_be32(opt2);
223 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
224 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
225 csk, &req->local_ip, ntohs(req->local_port),
226 &req->peer_ip, ntohs(req->peer_port),
227 csk->atid, csk->rss_qid);
229 struct cpl_t5_act_open_req *req =
230 (struct cpl_t5_act_open_req *)skb->head;
233 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
235 req->local_port = csk->saddr.sin_port;
236 req->peer_port = csk->daddr.sin_port;
237 req->local_ip = csk->saddr.sin_addr.s_addr;
238 req->peer_ip = csk->daddr.sin_addr.s_addr;
239 req->opt0 = cpu_to_be64(opt0);
240 req->params = cpu_to_be64(V_FILTER_TUPLE(
242 csk->cdev->ports[csk->port_id],
245 req->opt2 = cpu_to_be32(opt2);
247 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
248 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
249 csk, &req->local_ip, ntohs(req->local_port),
250 &req->peer_ip, ntohs(req->peer_port),
251 csk->atid, csk->rss_qid);
254 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
256 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
257 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
258 csk->state, csk->flags, csk->atid, csk->rss_qid);
260 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
263 #if IS_ENABLED(CONFIG_IPV6)
264 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
267 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
268 int t4 = is_t4(lldi->adapter_type);
269 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
270 unsigned long long opt0;
272 unsigned int qid_atid = ((unsigned int)csk->atid) |
273 (((unsigned int)csk->rss_qid) << 14);
275 opt0 = KEEP_ALIVE(1) |
277 MSS_IDX(csk->mss_idx) |
278 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
279 TX_CHAN(csk->tx_chan) |
280 SMAC_SEL(csk->smac_idx) |
281 ULP_MODE(ULP_MODE_ISCSI) |
282 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
284 opt2 = RX_CHANNEL(0) |
287 RSS_QUEUE(csk->rss_qid);
290 struct cpl_act_open_req6 *req =
291 (struct cpl_act_open_req6 *)skb->head;
294 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
296 req->local_port = csk->saddr6.sin6_port;
297 req->peer_port = csk->daddr6.sin6_port;
299 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
300 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
302 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
303 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
306 req->opt0 = cpu_to_be64(opt0);
309 req->opt2 = cpu_to_be32(opt2);
311 req->params = cpu_to_be32(cxgb4_select_ntuple(
312 csk->cdev->ports[csk->port_id],
315 struct cpl_t5_act_open_req6 *req =
316 (struct cpl_t5_act_open_req6 *)skb->head;
319 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
321 req->local_port = csk->saddr6.sin6_port;
322 req->peer_port = csk->daddr6.sin6_port;
323 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
324 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
326 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
327 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
329 req->opt0 = cpu_to_be64(opt0);
331 opt2 |= T5_OPT_2_VALID;
332 req->opt2 = cpu_to_be32(opt2);
334 req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
335 csk->cdev->ports[csk->port_id],
339 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
341 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
342 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
343 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
344 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
347 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
351 static void send_close_req(struct cxgbi_sock *csk)
353 struct sk_buff *skb = csk->cpl_close;
354 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
355 unsigned int tid = csk->tid;
357 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
358 "csk 0x%p,%u,0x%lx, tid %u.\n",
359 csk, csk->state, csk->flags, csk->tid);
360 csk->cpl_close = NULL;
361 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
362 INIT_TP_WR(req, tid);
363 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
366 cxgbi_sock_skb_entail(csk, skb);
367 if (csk->state >= CTP_ESTABLISHED)
368 push_tx_frames(csk, 1);
371 static void abort_arp_failure(void *handle, struct sk_buff *skb)
373 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
374 struct cpl_abort_req *req;
376 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
377 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
378 csk, csk->state, csk->flags, csk->tid);
379 req = (struct cpl_abort_req *)skb->data;
380 req->cmd = CPL_ABORT_NO_RST;
381 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
384 static void send_abort_req(struct cxgbi_sock *csk)
386 struct cpl_abort_req *req;
387 struct sk_buff *skb = csk->cpl_abort_req;
389 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
391 cxgbi_sock_set_state(csk, CTP_ABORTING);
392 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
393 cxgbi_sock_purge_write_queue(csk);
395 csk->cpl_abort_req = NULL;
396 req = (struct cpl_abort_req *)skb->head;
397 set_queue(skb, CPL_PRIORITY_DATA, csk);
398 req->cmd = CPL_ABORT_SEND_RST;
399 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
400 INIT_TP_WR(req, csk->tid);
401 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
402 req->rsvd0 = htonl(csk->snd_nxt);
403 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
405 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
406 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
407 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
410 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
413 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
415 struct sk_buff *skb = csk->cpl_abort_rpl;
416 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
418 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
419 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
420 csk, csk->state, csk->flags, csk->tid, rst_status);
422 csk->cpl_abort_rpl = NULL;
423 set_queue(skb, CPL_PRIORITY_DATA, csk);
424 INIT_TP_WR(rpl, csk->tid);
425 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
426 rpl->cmd = rst_status;
427 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
431 * CPL connection rx data ack: host ->
432 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
435 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
438 struct cpl_rx_data_ack *req;
440 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
441 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
442 csk, csk->state, csk->flags, csk->tid, credits);
444 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
446 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
449 req = (struct cpl_rx_data_ack *)skb->head;
451 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
452 INIT_TP_WR(req, csk->tid);
453 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
455 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
456 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
461 * sgl_len - calculates the size of an SGL of the given capacity
462 * @n: the number of SGL entries
463 * Calculates the number of flits needed for a scatter/gather list that
464 * can hold the given number of entries.
466 static inline unsigned int sgl_len(unsigned int n)
469 return (3 * n) / 2 + (n & 1) + 2;
473 * calc_tx_flits_ofld - calculate # of flits for an offload packet
476 * Returns the number of flits needed for the given offload packet.
477 * These packets are already fully constructed and no additional headers
480 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
482 unsigned int flits, cnt;
484 if (is_ofld_imm(skb))
485 return DIV_ROUND_UP(skb->len, 8);
486 flits = skb_transport_offset(skb) / 8;
487 cnt = skb_shinfo(skb)->nr_frags;
488 if (skb_tail_pointer(skb) != skb_transport_header(skb))
490 return flits + sgl_len(cnt);
493 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
496 struct fw_flowc_wr *flowc;
500 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
501 flowc = (struct fw_flowc_wr *)skb->head;
502 flowc->op_to_nparams =
503 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
504 flowc->flowid_len16 =
505 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
506 FW_WR_FLOWID(csk->tid));
507 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
508 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
509 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
510 flowc->mnemval[1].val = htonl(csk->tx_chan);
511 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
512 flowc->mnemval[2].val = htonl(csk->tx_chan);
513 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
514 flowc->mnemval[3].val = htonl(csk->rss_qid);
515 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
516 flowc->mnemval[4].val = htonl(csk->snd_nxt);
517 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
518 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
519 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
520 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
521 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
522 flowc->mnemval[7].val = htonl(csk->advmss);
523 flowc->mnemval[8].mnemonic = 0;
524 flowc->mnemval[8].val = 0;
525 for (i = 0; i < 9; i++) {
526 flowc->mnemval[i].r4[0] = 0;
527 flowc->mnemval[i].r4[1] = 0;
528 flowc->mnemval[i].r4[2] = 0;
530 set_queue(skb, CPL_PRIORITY_DATA, csk);
532 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
533 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
534 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
535 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
538 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
541 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
542 int dlen, int len, u32 credits, int compl)
544 struct fw_ofld_tx_data_wr *req;
545 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
546 unsigned int wr_ulp_mode = 0;
548 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
550 if (is_ofld_imm(skb)) {
551 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
553 FW_WR_IMMDLEN(dlen));
554 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
555 FW_WR_LEN16(credits));
558 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
562 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
563 FW_WR_LEN16(credits));
566 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
567 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
568 req->tunnel_to_proxy = htonl(wr_ulp_mode |
569 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1));
570 req->plen = htonl(len);
571 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
572 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
575 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
580 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
585 if (unlikely(csk->state < CTP_ESTABLISHED ||
586 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
587 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
588 1 << CXGBI_DBG_PDU_TX,
589 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
590 csk, csk->state, csk->flags, csk->tid);
594 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
597 unsigned int credits_needed;
599 skb_reset_transport_header(skb);
600 if (is_ofld_imm(skb))
601 credits_needed = DIV_ROUND_UP(dlen +
602 sizeof(struct fw_ofld_tx_data_wr), 16);
604 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
605 + sizeof(struct fw_ofld_tx_data_wr),
608 if (csk->wr_cred < credits_needed) {
609 log_debug(1 << CXGBI_DBG_PDU_TX,
610 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
611 csk, skb->len, skb->data_len,
612 credits_needed, csk->wr_cred);
615 __skb_unlink(skb, &csk->write_queue);
616 set_queue(skb, CPL_PRIORITY_DATA, csk);
617 skb->csum = credits_needed;
618 csk->wr_cred -= credits_needed;
619 csk->wr_una_cred += credits_needed;
620 cxgbi_sock_enqueue_wr(csk, skb);
622 log_debug(1 << CXGBI_DBG_PDU_TX,
623 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
624 csk, skb->len, skb->data_len, credits_needed,
625 csk->wr_cred, csk->wr_una_cred);
627 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
628 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
629 send_tx_flowc_wr(csk);
632 csk->wr_una_cred += 5;
634 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
635 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
638 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
640 total_size += skb->truesize;
641 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
643 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
644 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
645 csk, csk->state, csk->flags, csk->tid, skb, len);
647 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
652 static inline void free_atid(struct cxgbi_sock *csk)
654 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
656 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
657 cxgb4_free_atid(lldi->tids, csk->atid);
658 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
663 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
665 struct cxgbi_sock *csk;
666 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
667 unsigned short tcp_opt = ntohs(req->tcp_opt);
668 unsigned int tid = GET_TID(req);
669 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
670 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
671 struct tid_info *t = lldi->tids;
672 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
674 csk = lookup_atid(t, atid);
675 if (unlikely(!csk)) {
676 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
680 if (csk->atid != atid) {
681 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
682 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
686 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
687 (&csk->saddr), (&csk->daddr),
688 atid, tid, csk, csk->state, csk->flags, rcv_isn);
690 module_put(THIS_MODULE);
694 cxgb4_insert_tid(lldi->tids, csk, tid);
695 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
699 spin_lock_bh(&csk->lock);
700 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
701 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
702 csk, csk->state, csk->flags, csk->tid);
704 if (csk->retry_timer.function) {
705 del_timer(&csk->retry_timer);
706 csk->retry_timer.function = NULL;
709 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
711 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
714 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
715 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
717 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
718 if (GET_TCPOPT_TSTAMP(tcp_opt))
720 if (csk->advmss < 128)
723 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
724 "csk 0x%p, mss_idx %u, advmss %u.\n",
725 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
727 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
729 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
732 if (skb_queue_len(&csk->write_queue))
733 push_tx_frames(csk, 0);
734 cxgbi_conn_tx_open(csk);
736 spin_unlock_bh(&csk->lock);
742 static int act_open_rpl_status_to_errno(int status)
745 case CPL_ERR_CONN_RESET:
746 return -ECONNREFUSED;
747 case CPL_ERR_ARP_MISS:
748 return -EHOSTUNREACH;
749 case CPL_ERR_CONN_TIMEDOUT:
751 case CPL_ERR_TCAM_FULL:
753 case CPL_ERR_CONN_EXIST:
760 static void csk_act_open_retry_timer(unsigned long data)
762 struct sk_buff *skb = NULL;
763 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
764 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
765 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
767 int t4 = is_t4(lldi->adapter_type), size, size6;
769 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
770 "csk 0x%p,%u,0x%lx,%u.\n",
771 csk, csk->state, csk->flags, csk->tid);
774 spin_lock_bh(&csk->lock);
777 size = sizeof(struct cpl_act_open_req);
778 size6 = sizeof(struct cpl_act_open_req6);
780 size = sizeof(struct cpl_t5_act_open_req);
781 size6 = sizeof(struct cpl_t5_act_open_req6);
784 if (csk->csk_family == AF_INET) {
785 send_act_open_func = send_act_open_req;
786 skb = alloc_wr(size, 0, GFP_ATOMIC);
787 #if IS_ENABLED(CONFIG_IPV6)
789 send_act_open_func = send_act_open_req6;
790 skb = alloc_wr(size6, 0, GFP_ATOMIC);
795 cxgbi_sock_fail_act_open(csk, -ENOMEM);
797 skb->sk = (struct sock *)csk;
798 t4_set_arp_err_handler(skb, csk,
799 cxgbi_sock_act_open_req_arp_failure);
800 send_act_open_func(csk, skb, csk->l2t);
803 spin_unlock_bh(&csk->lock);
808 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
810 struct cxgbi_sock *csk;
811 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
812 unsigned int tid = GET_TID(rpl);
814 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
815 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
816 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
817 struct tid_info *t = lldi->tids;
819 csk = lookup_atid(t, atid);
820 if (unlikely(!csk)) {
821 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
825 pr_info_ipaddr("tid %u/%u, status %u.\n"
826 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
827 atid, tid, status, csk, csk->state, csk->flags);
829 if (status == CPL_ERR_RTX_NEG_ADVICE)
832 if (status && status != CPL_ERR_TCAM_FULL &&
833 status != CPL_ERR_CONN_EXIST &&
834 status != CPL_ERR_ARP_MISS)
835 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
838 spin_lock_bh(&csk->lock);
840 if (status == CPL_ERR_CONN_EXIST &&
841 csk->retry_timer.function != csk_act_open_retry_timer) {
842 csk->retry_timer.function = csk_act_open_retry_timer;
843 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
845 cxgbi_sock_fail_act_open(csk,
846 act_open_rpl_status_to_errno(status));
848 spin_unlock_bh(&csk->lock);
854 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
856 struct cxgbi_sock *csk;
857 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
858 unsigned int tid = GET_TID(req);
859 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
860 struct tid_info *t = lldi->tids;
862 csk = lookup_tid(t, tid);
863 if (unlikely(!csk)) {
864 pr_err("can't find connection for tid %u.\n", tid);
867 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
868 (&csk->saddr), (&csk->daddr),
869 csk, csk->state, csk->flags, csk->tid);
870 cxgbi_sock_rcv_peer_close(csk);
875 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
877 struct cxgbi_sock *csk;
878 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
879 unsigned int tid = GET_TID(rpl);
880 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
881 struct tid_info *t = lldi->tids;
883 csk = lookup_tid(t, tid);
884 if (unlikely(!csk)) {
885 pr_err("can't find connection for tid %u.\n", tid);
888 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
889 (&csk->saddr), (&csk->daddr),
890 csk, csk->state, csk->flags, csk->tid);
891 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
896 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
899 switch (abort_reason) {
900 case CPL_ERR_BAD_SYN: /* fall through */
901 case CPL_ERR_CONN_RESET:
902 return csk->state > CTP_ESTABLISHED ?
903 -EPIPE : -ECONNRESET;
904 case CPL_ERR_XMIT_TIMEDOUT:
905 case CPL_ERR_PERSIST_TIMEDOUT:
906 case CPL_ERR_FINWAIT2_TIMEDOUT:
907 case CPL_ERR_KEEPALIVE_TIMEDOUT:
914 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
916 struct cxgbi_sock *csk;
917 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
918 unsigned int tid = GET_TID(req);
919 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
920 struct tid_info *t = lldi->tids;
921 int rst_status = CPL_ABORT_NO_RST;
923 csk = lookup_tid(t, tid);
924 if (unlikely(!csk)) {
925 pr_err("can't find connection for tid %u.\n", tid);
929 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
930 (&csk->saddr), (&csk->daddr),
931 csk, csk->state, csk->flags, csk->tid, req->status);
933 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
934 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
938 spin_lock_bh(&csk->lock);
940 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
942 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
943 send_tx_flowc_wr(csk);
944 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
947 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
948 cxgbi_sock_set_state(csk, CTP_ABORTING);
950 send_abort_rpl(csk, rst_status);
952 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
953 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
954 cxgbi_sock_closed(csk);
957 spin_unlock_bh(&csk->lock);
963 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
965 struct cxgbi_sock *csk;
966 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
967 unsigned int tid = GET_TID(rpl);
968 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
969 struct tid_info *t = lldi->tids;
971 csk = lookup_tid(t, tid);
976 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
977 (&csk->saddr), (&csk->daddr), csk,
978 csk->state, csk->flags, csk->tid, rpl->status);
980 if (rpl->status == CPL_ERR_ABORT_FAILED)
983 cxgbi_sock_rcv_abort_rpl(csk);
988 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
990 struct cxgbi_sock *csk;
991 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
992 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
993 unsigned int tid = GET_TID(cpl);
994 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
995 struct tid_info *t = lldi->tids;
997 csk = lookup_tid(t, tid);
998 if (unlikely(!csk)) {
999 pr_err("can't find conn. for tid %u.\n", tid);
1003 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1004 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1005 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1008 spin_lock_bh(&csk->lock);
1010 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1011 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1012 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1013 csk, csk->state, csk->flags, csk->tid);
1014 if (csk->state != CTP_ABORTING)
1020 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1021 cxgbi_skcb_flags(skb) = 0;
1023 skb_reset_transport_header(skb);
1024 __skb_pull(skb, sizeof(*cpl));
1025 __pskb_trim(skb, ntohs(cpl->len));
1027 if (!csk->skb_ulp_lhdr) {
1029 unsigned int hlen, dlen, plen;
1031 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1032 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1033 csk, csk->state, csk->flags, csk->tid, skb);
1034 csk->skb_ulp_lhdr = skb;
1035 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1037 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1038 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1039 csk->tid, cxgbi_skcb_tcp_seq(skb),
1045 hlen = ntohs(cpl->len);
1046 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1048 plen = ISCSI_PDU_LEN(pdu_len_ddp);
1049 if (is_t4(lldi->adapter_type))
1052 if ((hlen + dlen) != plen) {
1053 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1054 "mismatch %u != %u + %u, seq 0x%x.\n",
1055 csk->tid, plen, hlen, dlen,
1056 cxgbi_skcb_tcp_seq(skb));
1060 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1062 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1063 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1065 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1066 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1067 csk, skb, *bhs, hlen, dlen,
1068 ntohl(*((unsigned int *)(bhs + 16))),
1069 ntohl(*((unsigned int *)(bhs + 24))));
1072 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1074 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1075 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1076 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1077 csk, csk->state, csk->flags, skb, lskb);
1080 __skb_queue_tail(&csk->receive_queue, skb);
1081 spin_unlock_bh(&csk->lock);
1085 send_abort_req(csk);
1087 spin_unlock_bh(&csk->lock);
1092 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1093 struct sk_buff *skb)
1095 struct cxgbi_sock *csk;
1096 struct sk_buff *lskb;
1097 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1098 unsigned int tid = GET_TID(rpl);
1099 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1100 struct tid_info *t = lldi->tids;
1101 unsigned int status = ntohl(rpl->ddpvld);
1103 csk = lookup_tid(t, tid);
1104 if (unlikely(!csk)) {
1105 pr_err("can't find connection for tid %u.\n", tid);
1109 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1110 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1111 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1113 spin_lock_bh(&csk->lock);
1115 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1116 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1117 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1118 csk, csk->state, csk->flags, csk->tid);
1119 if (csk->state != CTP_ABORTING)
1125 if (!csk->skb_ulp_lhdr) {
1126 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1130 lskb = csk->skb_ulp_lhdr;
1131 csk->skb_ulp_lhdr = NULL;
1133 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1135 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1136 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1137 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1139 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1140 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1141 csk, lskb, status, cxgbi_skcb_flags(lskb));
1142 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1144 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1145 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1146 csk, lskb, status, cxgbi_skcb_flags(lskb));
1147 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1149 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1150 log_debug(1 << CXGBI_DBG_PDU_RX,
1151 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1153 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1155 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1156 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1157 log_debug(1 << CXGBI_DBG_PDU_RX,
1158 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1160 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1162 log_debug(1 << CXGBI_DBG_PDU_RX,
1163 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1164 csk, lskb, cxgbi_skcb_flags(lskb));
1166 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1167 cxgbi_conn_pdu_ready(csk);
1168 spin_unlock_bh(&csk->lock);
1172 send_abort_req(csk);
1174 spin_unlock_bh(&csk->lock);
1179 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1181 struct cxgbi_sock *csk;
1182 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1183 unsigned int tid = GET_TID(rpl);
1184 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1185 struct tid_info *t = lldi->tids;
1187 csk = lookup_tid(t, tid);
1189 pr_err("can't find connection for tid %u.\n", tid);
1191 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1192 "csk 0x%p,%u,0x%lx,%u.\n",
1193 csk, csk->state, csk->flags, csk->tid);
1194 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1200 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1202 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1203 unsigned int tid = GET_TID(rpl);
1204 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1205 struct tid_info *t = lldi->tids;
1206 struct cxgbi_sock *csk;
1208 csk = lookup_tid(t, tid);
1210 pr_err("can't find conn. for tid %u.\n", tid);
1212 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1213 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1214 csk, csk->state, csk->flags, csk->tid, rpl->status);
1216 if (rpl->status != CPL_ERR_NONE)
1217 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1218 csk, tid, rpl->status);
1223 static int alloc_cpls(struct cxgbi_sock *csk)
1225 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1227 if (!csk->cpl_close)
1230 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1232 if (!csk->cpl_abort_req)
1235 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1237 if (!csk->cpl_abort_rpl)
1242 cxgbi_sock_free_cpl_skbs(csk);
1246 static inline void l2t_put(struct cxgbi_sock *csk)
1249 cxgb4_l2t_release(csk->l2t);
1251 cxgbi_sock_put(csk);
1255 static void release_offload_resources(struct cxgbi_sock *csk)
1257 struct cxgb4_lld_info *lldi;
1259 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1260 "csk 0x%p,%u,0x%lx,%u.\n",
1261 csk, csk->state, csk->flags, csk->tid);
1263 cxgbi_sock_free_cpl_skbs(csk);
1264 if (csk->wr_cred != csk->wr_max_cred) {
1265 cxgbi_sock_purge_wr_queue(csk);
1266 cxgbi_sock_reset_wr_list(csk);
1270 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1272 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1273 lldi = cxgbi_cdev_priv(csk->cdev);
1274 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1275 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1276 cxgbi_sock_put(csk);
1282 static int init_act_open(struct cxgbi_sock *csk)
1284 struct cxgbi_device *cdev = csk->cdev;
1285 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1286 struct net_device *ndev = cdev->ports[csk->port_id];
1287 struct sk_buff *skb = NULL;
1288 struct neighbour *n = NULL;
1291 unsigned int size, size6;
1292 int t4 = is_t4(lldi->adapter_type);
1294 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1295 "csk 0x%p,%u,0x%lx,%u.\n",
1296 csk, csk->state, csk->flags, csk->tid);
1298 if (csk->csk_family == AF_INET)
1299 daddr = &csk->daddr.sin_addr.s_addr;
1300 #if IS_ENABLED(CONFIG_IPV6)
1301 else if (csk->csk_family == AF_INET6)
1302 daddr = &csk->daddr6.sin6_addr;
1305 pr_err("address family 0x%x not supported\n", csk->csk_family);
1309 n = dst_neigh_lookup(csk->dst, daddr);
1312 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1316 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1317 if (csk->atid < 0) {
1318 pr_err("%s, NO atid available.\n", ndev->name);
1321 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1322 cxgbi_sock_get(csk);
1324 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1326 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1329 cxgbi_sock_get(csk);
1332 size = sizeof(struct cpl_act_open_req);
1333 size6 = sizeof(struct cpl_act_open_req6);
1335 size = sizeof(struct cpl_t5_act_open_req);
1336 size6 = sizeof(struct cpl_t5_act_open_req6);
1339 if (csk->csk_family == AF_INET)
1340 skb = alloc_wr(size, 0, GFP_NOIO);
1341 #if IS_ENABLED(CONFIG_IPV6)
1343 skb = alloc_wr(size6, 0, GFP_NOIO);
1348 skb->sk = (struct sock *)csk;
1349 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1352 csk->mtu = dst_mtu(csk->dst);
1353 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1354 csk->tx_chan = cxgb4_port_chan(ndev);
1355 /* SMT two entries per row */
1356 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1357 step = lldi->ntxq / lldi->nchan;
1358 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1359 step = lldi->nrxq / lldi->nchan;
1360 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1361 csk->wr_cred = lldi->wr_cred -
1362 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1363 csk->wr_max_cred = csk->wr_cred;
1364 csk->wr_una_cred = 0;
1365 cxgbi_sock_reset_wr_list(csk);
1368 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1369 (&csk->saddr), (&csk->daddr), csk, csk->state,
1370 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1371 csk->mtu, csk->mss_idx, csk->smac_idx);
1373 /* must wait for either a act_open_rpl or act_open_establish */
1374 try_module_get(THIS_MODULE);
1375 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1376 if (csk->csk_family == AF_INET)
1377 send_act_open_req(csk, skb, csk->l2t);
1378 #if IS_ENABLED(CONFIG_IPV6)
1380 send_act_open_req6(csk, skb, csk->l2t);
1394 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1395 [CPL_ACT_ESTABLISH] = do_act_establish,
1396 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1397 [CPL_PEER_CLOSE] = do_peer_close,
1398 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1399 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1400 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1401 [CPL_FW4_ACK] = do_fw4_ack,
1402 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1403 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1404 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1405 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1406 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1409 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1413 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1414 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1416 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1417 cxgb4i_max_connect);
1421 cdev->csk_release_offload_resources = release_offload_resources;
1422 cdev->csk_push_tx_frames = push_tx_frames;
1423 cdev->csk_send_abort_req = send_abort_req;
1424 cdev->csk_send_close_req = send_close_req;
1425 cdev->csk_send_rx_credits = send_rx_credits;
1426 cdev->csk_alloc_cpls = alloc_cpls;
1427 cdev->csk_init_act_open = init_act_open;
1429 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1434 * functions to program the pagepod in h/w
1436 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1437 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1438 struct ulp_mem_io *req,
1439 unsigned int wr_len, unsigned int dlen,
1440 unsigned int pm_addr)
1442 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1444 INIT_ULPTX_WR(req, wr_len, 0, 0);
1445 if (is_t4(lldi->adapter_type))
1446 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1447 (ULP_MEMIO_ORDER(1)));
1449 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1450 (V_T5_ULP_MEMIO_IMM(1)));
1451 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1452 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1453 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1455 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1456 idata->len = htonl(dlen);
1459 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1460 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1462 struct cxgbi_gather_list *gl,
1463 unsigned int gl_pidx)
1465 struct cxgbi_ddp_info *ddp = cdev->ddp;
1466 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1467 struct sk_buff *skb;
1468 struct ulp_mem_io *req;
1469 struct ulptx_idata *idata;
1470 struct cxgbi_pagepod *ppod;
1471 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1472 unsigned int dlen = PPOD_SIZE * npods;
1473 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1474 sizeof(struct ulptx_idata) + dlen, 16);
1477 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1479 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1483 req = (struct ulp_mem_io *)skb->head;
1484 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1486 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
1487 idata = (struct ulptx_idata *)(req + 1);
1488 ppod = (struct cxgbi_pagepod *)(idata + 1);
1490 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1492 cxgbi_ddp_ppod_clear(ppod);
1494 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1497 cxgb4_ofld_send(cdev->ports[port_id], skb);
1501 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1502 unsigned int idx, unsigned int npods,
1503 struct cxgbi_gather_list *gl)
1505 unsigned int i, cnt;
1508 for (i = 0; i < npods; i += cnt, idx += cnt) {
1510 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1511 cnt = ULPMEM_IDATA_MAX_NPPODS;
1512 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1513 idx, cnt, gl, 4 * i);
1520 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1521 unsigned int idx, unsigned int npods)
1523 unsigned int i, cnt;
1526 for (i = 0; i < npods; i += cnt, idx += cnt) {
1528 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1529 cnt = ULPMEM_IDATA_MAX_NPPODS;
1530 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1537 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1538 int pg_idx, bool reply)
1540 struct sk_buff *skb;
1541 struct cpl_set_tcb_field *req;
1543 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1546 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1550 /* set up ulp page size */
1551 req = (struct cpl_set_tcb_field *)skb->head;
1552 INIT_TP_WR(req, csk->tid);
1553 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1554 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1555 req->word_cookie = htons(0);
1556 req->mask = cpu_to_be64(0x3 << 8);
1557 req->val = cpu_to_be64(pg_idx << 8);
1558 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1560 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1561 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1563 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1567 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1568 int hcrc, int dcrc, int reply)
1570 struct sk_buff *skb;
1571 struct cpl_set_tcb_field *req;
1576 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1580 csk->hcrc_len = (hcrc ? 4 : 0);
1581 csk->dcrc_len = (dcrc ? 4 : 0);
1582 /* set up ulp submode */
1583 req = (struct cpl_set_tcb_field *)skb->head;
1584 INIT_TP_WR(req, tid);
1585 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1586 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1587 req->word_cookie = htons(0);
1588 req->mask = cpu_to_be64(0x3 << 4);
1589 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1590 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1591 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1593 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1594 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1596 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1600 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1602 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1603 struct cxgbi_ddp_info *ddp = cdev->ddp;
1604 unsigned int tagmask, pgsz_factor[4];
1608 kref_get(&ddp->refcnt);
1609 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1614 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1615 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1616 lldi->iscsi_iolen, lldi->iscsi_iolen);
1622 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1623 cxgbi_ddp_page_size_factor(pgsz_factor);
1624 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1626 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1627 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1628 cdev->csk_ddp_set = ddp_set_map;
1629 cdev->csk_ddp_clear = ddp_clear_map;
1631 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1632 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1633 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1634 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1636 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1637 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1638 ddp->max_rxsz, lldi->iscsi_iolen);
1639 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1640 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1645 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1647 struct cxgbi_device *cdev;
1648 struct port_info *pi;
1651 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1653 pr_info("t4 device 0x%p, register failed.\n", lldi);
1656 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1657 cdev, lldi->adapter_type, lldi->nports,
1658 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1659 lldi->nrxq, lldi->wr_cred);
1660 for (i = 0; i < lldi->nrxq; i++)
1661 log_debug(1 << CXGBI_DBG_DEV,
1662 "t4 0x%p, rxq id #%d: %u.\n",
1663 cdev, i, lldi->rxq_ids[i]);
1665 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1666 cdev->flags = CXGBI_FLAG_DEV_T4;
1667 cdev->pdev = lldi->pdev;
1668 cdev->ports = lldi->ports;
1669 cdev->nports = lldi->nports;
1670 cdev->mtus = lldi->mtus;
1671 cdev->nmtus = NMTUS;
1672 cdev->snd_win = cxgb4i_snd_win;
1673 cdev->rcv_win = cxgb4i_rcv_win;
1674 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1675 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1676 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1677 cdev->itp = &cxgb4i_iscsi_transport;
1679 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1680 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1681 cdev, lldi->ports[0]->name, cdev->pfvf);
1683 rc = cxgb4i_ddp_init(cdev);
1685 pr_info("t4 0x%p ddp init failed.\n", cdev);
1688 rc = cxgb4i_ofld_init(cdev);
1690 pr_info("t4 0x%p ofld init failed.\n", cdev);
1694 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1695 &cxgb4i_host_template, cxgb4i_stt);
1699 for (i = 0; i < cdev->nports; i++) {
1700 pi = netdev_priv(lldi->ports[i]);
1701 cdev->hbas[i]->port_id = pi->port_id;
1706 cxgbi_device_unregister(cdev);
1707 return ERR_PTR(-ENOMEM);
1710 #define RX_PULL_LEN 128
1711 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1712 const struct pkt_gl *pgl)
1714 const struct cpl_act_establish *rpl;
1715 struct sk_buff *skb;
1717 struct cxgbi_device *cdev = handle;
1720 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1722 skb = alloc_wr(len, 0, GFP_ATOMIC);
1725 skb_copy_to_linear_data(skb, &rsp[1], len);
1727 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1728 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1729 pgl->va, be64_to_cpu(*rsp),
1730 be64_to_cpu(*(u64 *)pgl->va),
1734 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1739 rpl = (struct cpl_act_establish *)skb->data;
1740 opc = rpl->ot.opcode;
1741 log_debug(1 << CXGBI_DBG_TOE,
1742 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1743 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1744 if (cxgb4i_cplhandlers[opc])
1745 cxgb4i_cplhandlers[opc](cdev, skb);
1747 pr_err("No handler for opcode 0x%x.\n", opc);
1752 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1756 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1758 struct cxgbi_device *cdev = handle;
1761 case CXGB4_STATE_UP:
1762 pr_info("cdev 0x%p, UP.\n", cdev);
1764 case CXGB4_STATE_START_RECOVERY:
1765 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1766 /* close all connections */
1768 case CXGB4_STATE_DOWN:
1769 pr_info("cdev 0x%p, DOWN.\n", cdev);
1771 case CXGB4_STATE_DETACH:
1772 pr_info("cdev 0x%p, DETACH.\n", cdev);
1773 cxgbi_device_unregister(cdev);
1776 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1782 static int __init cxgb4i_init_module(void)
1786 printk(KERN_INFO "%s", version);
1788 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1791 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1796 static void __exit cxgb4i_exit_module(void)
1798 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1799 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1800 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1803 module_init(cxgb4i_init_module);
1804 module_exit(cxgb4i_exit_module);