2 * cxgb4i.c: Chelsio T4 iSCSI driver.
4 * Copyright (c) 2010-2015 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/kernel.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <scsi/scsi_host.h>
22 #include <linux/netdevice.h>
23 #include <net/addrconf.h>
28 #include "cxgb4_uld.h"
34 static unsigned int dbg_level;
36 #include "../libcxgbi.h"
38 #ifdef CONFIG_CHELSIO_T4_DCB
39 #include <net/dcbevent.h>
40 #include "cxgb4_dcb.h"
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"
48 static char version[] =
49 DRV_MODULE_DESC " " DRV_MODULE_NAME
50 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
52 MODULE_AUTHOR("Chelsio Communications, Inc.");
53 MODULE_DESCRIPTION(DRV_MODULE_DESC);
54 MODULE_VERSION(DRV_MODULE_VERSION);
55 MODULE_LICENSE("GPL");
57 module_param(dbg_level, uint, 0644);
58 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
60 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
61 static int cxgb4i_rcv_win = -1;
62 module_param(cxgb4i_rcv_win, int, 0644);
63 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
65 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
66 static int cxgb4i_snd_win = -1;
67 module_param(cxgb4i_snd_win, int, 0644);
68 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
70 static int cxgb4i_rx_credit_thres = 10 * 1024;
71 module_param(cxgb4i_rx_credit_thres, int, 0644);
72 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
73 "RX credits return threshold in bytes (default=10KB)");
75 static unsigned int cxgb4i_max_connect = (8 * 1024);
76 module_param(cxgb4i_max_connect, uint, 0644);
77 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
79 static unsigned short cxgb4i_sport_base = 20000;
80 module_param(cxgb4i_sport_base, ushort, 0644);
81 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
83 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
85 static void *t4_uld_add(const struct cxgb4_lld_info *);
86 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
87 static int t4_uld_state_change(void *, enum cxgb4_state state);
88 static inline int send_tx_flowc_wr(struct cxgbi_sock *);
90 static const struct cxgb4_uld_info cxgb4i_uld_info = {
91 .name = DRV_MODULE_NAME,
92 .nrxq = MAX_ULD_QSETS,
93 .ntxq = MAX_ULD_QSETS,
97 .rx_handler = t4_uld_rx_handler,
98 .state_change = t4_uld_state_change,
101 static 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 .use_clustering = DISABLE_CLUSTERING,
118 .track_queue_depth = 1,
121 static struct iscsi_transport cxgb4i_iscsi_transport = {
122 .owner = THIS_MODULE,
123 .name = DRV_MODULE_NAME,
124 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
125 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
126 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
127 .attr_is_visible = cxgbi_attr_is_visible,
128 .get_host_param = cxgbi_get_host_param,
129 .set_host_param = cxgbi_set_host_param,
130 /* session management */
131 .create_session = cxgbi_create_session,
132 .destroy_session = cxgbi_destroy_session,
133 .get_session_param = iscsi_session_get_param,
134 /* connection management */
135 .create_conn = cxgbi_create_conn,
136 .bind_conn = cxgbi_bind_conn,
137 .destroy_conn = iscsi_tcp_conn_teardown,
138 .start_conn = iscsi_conn_start,
139 .stop_conn = iscsi_conn_stop,
140 .get_conn_param = iscsi_conn_get_param,
141 .set_param = cxgbi_set_conn_param,
142 .get_stats = cxgbi_get_conn_stats,
143 /* pdu xmit req from user space */
144 .send_pdu = iscsi_conn_send_pdu,
146 .init_task = iscsi_tcp_task_init,
147 .xmit_task = iscsi_tcp_task_xmit,
148 .cleanup_task = cxgbi_cleanup_task,
150 .alloc_pdu = cxgbi_conn_alloc_pdu,
151 .init_pdu = cxgbi_conn_init_pdu,
152 .xmit_pdu = cxgbi_conn_xmit_pdu,
153 .parse_pdu_itt = cxgbi_parse_pdu_itt,
154 /* TCP connect/disconnect */
155 .get_ep_param = cxgbi_get_ep_param,
156 .ep_connect = cxgbi_ep_connect,
157 .ep_poll = cxgbi_ep_poll,
158 .ep_disconnect = cxgbi_ep_disconnect,
159 /* Error recovery timeout call */
160 .session_recovery_timedout = iscsi_session_recovery_timedout,
163 #ifdef CONFIG_CHELSIO_T4_DCB
165 cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *);
167 static struct notifier_block cxgb4_dcb_change = {
168 .notifier_call = cxgb4_dcb_change_notify,
172 static struct scsi_transport_template *cxgb4i_stt;
175 * CPL (Chelsio Protocol Language) defines a message passing interface between
176 * the host driver and Chelsio asic.
177 * The section below implments CPLs that related to iscsi tcp connection
178 * open/close/abort and data send/receive.
181 #define RCV_BUFSIZ_MASK 0x3FFU
182 #define MAX_IMM_TX_PKT_LEN 256
184 static int push_tx_frames(struct cxgbi_sock *, int);
187 * is_ofld_imm - check whether a packet can be sent as immediate data
190 * Returns true if a packet can be sent as an offload WR with immediate
191 * data. We currently use the same limit as for Ethernet packets.
193 static inline bool is_ofld_imm(const struct sk_buff *skb)
197 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
198 len += sizeof(struct fw_ofld_tx_data_wr);
200 return len <= MAX_IMM_TX_PKT_LEN;
203 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
206 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
207 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
208 unsigned long long opt0;
210 unsigned int qid_atid = ((unsigned int)csk->atid) |
211 (((unsigned int)csk->rss_qid) << 14);
213 opt0 = KEEP_ALIVE_F |
214 WND_SCALE_V(wscale) |
215 MSS_IDX_V(csk->mss_idx) |
216 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
217 TX_CHAN_V(csk->tx_chan) |
218 SMAC_SEL_V(csk->smac_idx) |
219 ULP_MODE_V(ULP_MODE_ISCSI) |
220 RCV_BUFSIZ_V(csk->rcv_win >> 10);
222 opt2 = RX_CHANNEL_V(0) |
224 RSS_QUEUE_V(csk->rss_qid);
226 if (is_t4(lldi->adapter_type)) {
227 struct cpl_act_open_req *req =
228 (struct cpl_act_open_req *)skb->head;
231 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
233 req->local_port = csk->saddr.sin_port;
234 req->peer_port = csk->daddr.sin_port;
235 req->local_ip = csk->saddr.sin_addr.s_addr;
236 req->peer_ip = csk->daddr.sin_addr.s_addr;
237 req->opt0 = cpu_to_be64(opt0);
238 req->params = cpu_to_be32(cxgb4_select_ntuple(
239 csk->cdev->ports[csk->port_id],
241 opt2 |= RX_FC_VALID_F;
242 req->opt2 = cpu_to_be32(opt2);
244 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
245 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
246 csk, &req->local_ip, ntohs(req->local_port),
247 &req->peer_ip, ntohs(req->peer_port),
248 csk->atid, csk->rss_qid);
249 } else if (is_t5(lldi->adapter_type)) {
250 struct cpl_t5_act_open_req *req =
251 (struct cpl_t5_act_open_req *)skb->head;
252 u32 isn = (prandom_u32() & ~7UL) - 1;
255 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
257 req->local_port = csk->saddr.sin_port;
258 req->peer_port = csk->daddr.sin_port;
259 req->local_ip = csk->saddr.sin_addr.s_addr;
260 req->peer_ip = csk->daddr.sin_addr.s_addr;
261 req->opt0 = cpu_to_be64(opt0);
262 req->params = cpu_to_be64(FILTER_TUPLE_V(
264 csk->cdev->ports[csk->port_id],
266 req->rsvd = cpu_to_be32(isn);
267 opt2 |= T5_ISS_VALID;
268 opt2 |= T5_OPT_2_VALID_F;
270 req->opt2 = cpu_to_be32(opt2);
272 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
273 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
274 csk, &req->local_ip, ntohs(req->local_port),
275 &req->peer_ip, ntohs(req->peer_port),
276 csk->atid, csk->rss_qid);
278 struct cpl_t6_act_open_req *req =
279 (struct cpl_t6_act_open_req *)skb->head;
280 u32 isn = (prandom_u32() & ~7UL) - 1;
283 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
285 req->local_port = csk->saddr.sin_port;
286 req->peer_port = csk->daddr.sin_port;
287 req->local_ip = csk->saddr.sin_addr.s_addr;
288 req->peer_ip = csk->daddr.sin_addr.s_addr;
289 req->opt0 = cpu_to_be64(opt0);
290 req->params = cpu_to_be64(FILTER_TUPLE_V(
292 csk->cdev->ports[csk->port_id],
294 req->rsvd = cpu_to_be32(isn);
296 opt2 |= T5_ISS_VALID;
297 opt2 |= RX_FC_DISABLE_F;
298 opt2 |= T5_OPT_2_VALID_F;
300 req->opt2 = cpu_to_be32(opt2);
301 req->rsvd2 = cpu_to_be32(0);
302 req->opt3 = cpu_to_be32(0);
304 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
305 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
306 csk, &req->local_ip, ntohs(req->local_port),
307 &req->peer_ip, ntohs(req->peer_port),
308 csk->atid, csk->rss_qid);
311 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
313 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
314 (&csk->saddr), (&csk->daddr),
315 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
316 csk->state, csk->flags, csk->atid, csk->rss_qid);
318 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
321 #if IS_ENABLED(CONFIG_IPV6)
322 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
325 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
326 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
327 unsigned long long opt0;
329 unsigned int qid_atid = ((unsigned int)csk->atid) |
330 (((unsigned int)csk->rss_qid) << 14);
332 opt0 = KEEP_ALIVE_F |
333 WND_SCALE_V(wscale) |
334 MSS_IDX_V(csk->mss_idx) |
335 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
336 TX_CHAN_V(csk->tx_chan) |
337 SMAC_SEL_V(csk->smac_idx) |
338 ULP_MODE_V(ULP_MODE_ISCSI) |
339 RCV_BUFSIZ_V(csk->rcv_win >> 10);
341 opt2 = RX_CHANNEL_V(0) |
343 RSS_QUEUE_V(csk->rss_qid);
345 if (is_t4(lldi->adapter_type)) {
346 struct cpl_act_open_req6 *req =
347 (struct cpl_act_open_req6 *)skb->head;
350 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
352 req->local_port = csk->saddr6.sin6_port;
353 req->peer_port = csk->daddr6.sin6_port;
355 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
356 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
358 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
359 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
362 req->opt0 = cpu_to_be64(opt0);
364 opt2 |= RX_FC_VALID_F;
365 req->opt2 = cpu_to_be32(opt2);
367 req->params = cpu_to_be32(cxgb4_select_ntuple(
368 csk->cdev->ports[csk->port_id],
370 } else if (is_t5(lldi->adapter_type)) {
371 struct cpl_t5_act_open_req6 *req =
372 (struct cpl_t5_act_open_req6 *)skb->head;
375 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
377 req->local_port = csk->saddr6.sin6_port;
378 req->peer_port = csk->daddr6.sin6_port;
379 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
380 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
382 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
383 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
385 req->opt0 = cpu_to_be64(opt0);
387 opt2 |= T5_OPT_2_VALID_F;
388 req->opt2 = cpu_to_be32(opt2);
390 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
391 csk->cdev->ports[csk->port_id],
394 struct cpl_t6_act_open_req6 *req =
395 (struct cpl_t6_act_open_req6 *)skb->head;
398 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
400 req->local_port = csk->saddr6.sin6_port;
401 req->peer_port = csk->daddr6.sin6_port;
402 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
403 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
405 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
406 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
408 req->opt0 = cpu_to_be64(opt0);
410 opt2 |= RX_FC_DISABLE_F;
411 opt2 |= T5_OPT_2_VALID_F;
413 req->opt2 = cpu_to_be32(opt2);
415 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
416 csk->cdev->ports[csk->port_id],
419 req->rsvd2 = cpu_to_be32(0);
420 req->opt3 = cpu_to_be32(0);
423 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
425 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
426 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
427 csk->flags, csk->atid,
428 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
429 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
432 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
436 static void send_close_req(struct cxgbi_sock *csk)
438 struct sk_buff *skb = csk->cpl_close;
439 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
440 unsigned int tid = csk->tid;
442 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
443 "csk 0x%p,%u,0x%lx, tid %u.\n",
444 csk, csk->state, csk->flags, csk->tid);
445 csk->cpl_close = NULL;
446 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
447 INIT_TP_WR(req, tid);
448 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
451 cxgbi_sock_skb_entail(csk, skb);
452 if (csk->state >= CTP_ESTABLISHED)
453 push_tx_frames(csk, 1);
456 static void abort_arp_failure(void *handle, struct sk_buff *skb)
458 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
459 struct cpl_abort_req *req;
461 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
462 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
463 csk, csk->state, csk->flags, csk->tid);
464 req = (struct cpl_abort_req *)skb->data;
465 req->cmd = CPL_ABORT_NO_RST;
466 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
469 static void send_abort_req(struct cxgbi_sock *csk)
471 struct cpl_abort_req *req;
472 struct sk_buff *skb = csk->cpl_abort_req;
474 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
477 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
478 send_tx_flowc_wr(csk);
479 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
482 cxgbi_sock_set_state(csk, CTP_ABORTING);
483 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
484 cxgbi_sock_purge_write_queue(csk);
486 csk->cpl_abort_req = NULL;
487 req = (struct cpl_abort_req *)skb->head;
488 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
489 req->cmd = CPL_ABORT_SEND_RST;
490 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
491 INIT_TP_WR(req, csk->tid);
492 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
493 req->rsvd0 = htonl(csk->snd_nxt);
494 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
496 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
497 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
498 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
501 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
504 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
506 struct sk_buff *skb = csk->cpl_abort_rpl;
507 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
509 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
510 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
511 csk, csk->state, csk->flags, csk->tid, rst_status);
513 csk->cpl_abort_rpl = NULL;
514 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
515 INIT_TP_WR(rpl, csk->tid);
516 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
517 rpl->cmd = rst_status;
518 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
522 * CPL connection rx data ack: host ->
523 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
526 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
529 struct cpl_rx_data_ack *req;
531 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
532 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
533 csk, csk->state, csk->flags, csk->tid, credits);
535 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
537 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
540 req = (struct cpl_rx_data_ack *)skb->head;
542 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
543 INIT_TP_WR(req, csk->tid);
544 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
546 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
548 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
553 * sgl_len - calculates the size of an SGL of the given capacity
554 * @n: the number of SGL entries
555 * Calculates the number of flits needed for a scatter/gather list that
556 * can hold the given number of entries.
558 static inline unsigned int sgl_len(unsigned int n)
561 return (3 * n) / 2 + (n & 1) + 2;
565 * calc_tx_flits_ofld - calculate # of flits for an offload packet
568 * Returns the number of flits needed for the given offload packet.
569 * These packets are already fully constructed and no additional headers
572 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
574 unsigned int flits, cnt;
576 if (is_ofld_imm(skb))
577 return DIV_ROUND_UP(skb->len, 8);
578 flits = skb_transport_offset(skb) / 8;
579 cnt = skb_shinfo(skb)->nr_frags;
580 if (skb_tail_pointer(skb) != skb_transport_header(skb))
582 return flits + sgl_len(cnt);
585 #define FLOWC_WR_NPARAMS_MIN 9
586 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
588 int nparams, flowclen16, flowclen;
590 nparams = FLOWC_WR_NPARAMS_MIN;
591 #ifdef CONFIG_CHELSIO_T4_DCB
594 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
595 flowclen16 = DIV_ROUND_UP(flowclen, 16);
596 flowclen = flowclen16 * 16;
598 * Return the number of 16-byte credits used by the FlowC request.
599 * Pass back the nparams and actual FlowC length if requested.
604 *flowclenp = flowclen;
609 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
612 struct fw_flowc_wr *flowc;
613 int nparams, flowclen16, flowclen;
615 #ifdef CONFIG_CHELSIO_T4_DCB
616 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
618 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
619 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
620 flowc = (struct fw_flowc_wr *)skb->head;
621 flowc->op_to_nparams =
622 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
623 flowc->flowid_len16 =
624 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
625 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
626 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
627 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
628 flowc->mnemval[1].val = htonl(csk->tx_chan);
629 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
630 flowc->mnemval[2].val = htonl(csk->tx_chan);
631 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
632 flowc->mnemval[3].val = htonl(csk->rss_qid);
633 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
634 flowc->mnemval[4].val = htonl(csk->snd_nxt);
635 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
636 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
637 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
638 flowc->mnemval[6].val = htonl(csk->snd_win);
639 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
640 flowc->mnemval[7].val = htonl(csk->advmss);
641 flowc->mnemval[8].mnemonic = 0;
642 flowc->mnemval[8].val = 0;
643 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
644 flowc->mnemval[8].val = 16384;
645 #ifdef CONFIG_CHELSIO_T4_DCB
646 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
647 if (vlan == CPL_L2T_VLAN_NONE) {
648 pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n",
650 flowc->mnemval[9].val = cpu_to_be32(0);
652 flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >>
657 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
659 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
660 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
661 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
662 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
665 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
670 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
671 int dlen, int len, u32 credits, int compl)
673 struct fw_ofld_tx_data_wr *req;
674 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
675 unsigned int wr_ulp_mode = 0, val;
676 bool imm = is_ofld_imm(skb);
678 req = __skb_push(skb, sizeof(*req));
681 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
683 FW_WR_IMMDLEN_V(dlen));
684 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
685 FW_WR_LEN16_V(credits));
688 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
692 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
693 FW_WR_LEN16_V(credits));
696 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
697 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
698 val = skb_peek(&csk->write_queue) ? 0 : 1;
699 req->tunnel_to_proxy = htonl(wr_ulp_mode |
700 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
701 req->plen = htonl(len);
702 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
703 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
706 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
711 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
716 if (unlikely(csk->state < CTP_ESTABLISHED ||
717 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
718 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
719 1 << CXGBI_DBG_PDU_TX,
720 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
721 csk, csk->state, csk->flags, csk->tid);
725 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
728 unsigned int credits_needed;
731 skb_reset_transport_header(skb);
732 if (is_ofld_imm(skb))
733 credits_needed = DIV_ROUND_UP(dlen, 16);
735 credits_needed = DIV_ROUND_UP(
736 8 * calc_tx_flits_ofld(skb),
739 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
740 credits_needed += DIV_ROUND_UP(
741 sizeof(struct fw_ofld_tx_data_wr),
745 * Assumes the initial credits is large enough to support
746 * fw_flowc_wr plus largest possible first payload
748 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
749 flowclen16 = send_tx_flowc_wr(csk);
750 csk->wr_cred -= flowclen16;
751 csk->wr_una_cred += flowclen16;
752 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
755 if (csk->wr_cred < credits_needed) {
756 log_debug(1 << CXGBI_DBG_PDU_TX,
757 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
758 csk, skb->len, skb->data_len,
759 credits_needed, csk->wr_cred);
762 __skb_unlink(skb, &csk->write_queue);
763 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
764 skb->csum = credits_needed + flowclen16;
765 csk->wr_cred -= credits_needed;
766 csk->wr_una_cred += credits_needed;
767 cxgbi_sock_enqueue_wr(csk, skb);
769 log_debug(1 << CXGBI_DBG_PDU_TX,
770 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
771 csk, skb->len, skb->data_len, credits_needed,
772 csk->wr_cred, csk->wr_una_cred);
774 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
775 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
776 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
779 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
780 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
781 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
782 struct cpl_close_con_req *req =
783 (struct cpl_close_con_req *)skb->data;
784 req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
786 total_size += skb->truesize;
787 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
789 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
790 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
791 csk, csk->state, csk->flags, csk->tid, skb, len);
793 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
798 static inline void free_atid(struct cxgbi_sock *csk)
800 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
802 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
803 cxgb4_free_atid(lldi->tids, csk->atid);
804 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
809 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
811 struct cxgbi_sock *csk;
812 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
813 unsigned short tcp_opt = ntohs(req->tcp_opt);
814 unsigned int tid = GET_TID(req);
815 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
816 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
817 struct tid_info *t = lldi->tids;
818 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
820 csk = lookup_atid(t, atid);
821 if (unlikely(!csk)) {
822 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
826 if (csk->atid != atid) {
827 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
828 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
832 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
833 (&csk->saddr), (&csk->daddr),
834 atid, tid, csk, csk->state, csk->flags, rcv_isn);
836 module_put(cdev->owner);
840 cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);
841 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
845 spin_lock_bh(&csk->lock);
846 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
847 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
848 csk, csk->state, csk->flags, csk->tid);
850 if (csk->retry_timer.function) {
851 del_timer(&csk->retry_timer);
852 csk->retry_timer.function = NULL;
855 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
857 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
860 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
861 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
863 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
864 if (TCPOPT_TSTAMP_G(tcp_opt))
866 if (csk->advmss < 128)
869 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
870 "csk 0x%p, mss_idx %u, advmss %u.\n",
871 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
873 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
875 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
878 if (skb_queue_len(&csk->write_queue))
879 push_tx_frames(csk, 0);
880 cxgbi_conn_tx_open(csk);
882 spin_unlock_bh(&csk->lock);
888 static int act_open_rpl_status_to_errno(int status)
891 case CPL_ERR_CONN_RESET:
892 return -ECONNREFUSED;
893 case CPL_ERR_ARP_MISS:
894 return -EHOSTUNREACH;
895 case CPL_ERR_CONN_TIMEDOUT:
897 case CPL_ERR_TCAM_FULL:
899 case CPL_ERR_CONN_EXIST:
906 static void csk_act_open_retry_timer(struct timer_list *t)
908 struct sk_buff *skb = NULL;
909 struct cxgbi_sock *csk = from_timer(csk, t, retry_timer);
910 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
911 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
913 int t4 = is_t4(lldi->adapter_type), size, size6;
915 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
916 "csk 0x%p,%u,0x%lx,%u.\n",
917 csk, csk->state, csk->flags, csk->tid);
920 spin_lock_bh(&csk->lock);
923 size = sizeof(struct cpl_act_open_req);
924 size6 = sizeof(struct cpl_act_open_req6);
926 size = sizeof(struct cpl_t5_act_open_req);
927 size6 = sizeof(struct cpl_t5_act_open_req6);
930 if (csk->csk_family == AF_INET) {
931 send_act_open_func = send_act_open_req;
932 skb = alloc_wr(size, 0, GFP_ATOMIC);
933 #if IS_ENABLED(CONFIG_IPV6)
935 send_act_open_func = send_act_open_req6;
936 skb = alloc_wr(size6, 0, GFP_ATOMIC);
941 cxgbi_sock_fail_act_open(csk, -ENOMEM);
943 skb->sk = (struct sock *)csk;
944 t4_set_arp_err_handler(skb, csk,
945 cxgbi_sock_act_open_req_arp_failure);
946 send_act_open_func(csk, skb, csk->l2t);
949 spin_unlock_bh(&csk->lock);
954 static inline bool is_neg_adv(unsigned int status)
956 return status == CPL_ERR_RTX_NEG_ADVICE ||
957 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
958 status == CPL_ERR_PERSIST_NEG_ADVICE;
961 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
963 struct cxgbi_sock *csk;
964 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
965 unsigned int tid = GET_TID(rpl);
967 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
968 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
969 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
970 struct tid_info *t = lldi->tids;
972 csk = lookup_atid(t, atid);
973 if (unlikely(!csk)) {
974 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
978 pr_info_ipaddr("tid %u/%u, status %u.\n"
979 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
980 atid, tid, status, csk, csk->state, csk->flags);
982 if (is_neg_adv(status))
985 module_put(cdev->owner);
987 if (status && status != CPL_ERR_TCAM_FULL &&
988 status != CPL_ERR_CONN_EXIST &&
989 status != CPL_ERR_ARP_MISS)
990 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl),
994 spin_lock_bh(&csk->lock);
996 if (status == CPL_ERR_CONN_EXIST &&
997 csk->retry_timer.function != csk_act_open_retry_timer) {
998 csk->retry_timer.function = csk_act_open_retry_timer;
999 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
1001 cxgbi_sock_fail_act_open(csk,
1002 act_open_rpl_status_to_errno(status));
1004 spin_unlock_bh(&csk->lock);
1005 cxgbi_sock_put(csk);
1010 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
1012 struct cxgbi_sock *csk;
1013 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
1014 unsigned int tid = GET_TID(req);
1015 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1016 struct tid_info *t = lldi->tids;
1018 csk = lookup_tid(t, tid);
1019 if (unlikely(!csk)) {
1020 pr_err("can't find connection for tid %u.\n", tid);
1023 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1024 (&csk->saddr), (&csk->daddr),
1025 csk, csk->state, csk->flags, csk->tid);
1026 cxgbi_sock_rcv_peer_close(csk);
1031 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1033 struct cxgbi_sock *csk;
1034 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1035 unsigned int tid = GET_TID(rpl);
1036 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1037 struct tid_info *t = lldi->tids;
1039 csk = lookup_tid(t, tid);
1040 if (unlikely(!csk)) {
1041 pr_err("can't find connection for tid %u.\n", tid);
1044 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1045 (&csk->saddr), (&csk->daddr),
1046 csk, csk->state, csk->flags, csk->tid);
1047 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1052 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1055 switch (abort_reason) {
1056 case CPL_ERR_BAD_SYN: /* fall through */
1057 case CPL_ERR_CONN_RESET:
1058 return csk->state > CTP_ESTABLISHED ?
1059 -EPIPE : -ECONNRESET;
1060 case CPL_ERR_XMIT_TIMEDOUT:
1061 case CPL_ERR_PERSIST_TIMEDOUT:
1062 case CPL_ERR_FINWAIT2_TIMEDOUT:
1063 case CPL_ERR_KEEPALIVE_TIMEDOUT:
1070 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1072 struct cxgbi_sock *csk;
1073 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1074 unsigned int tid = GET_TID(req);
1075 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1076 struct tid_info *t = lldi->tids;
1077 int rst_status = CPL_ABORT_NO_RST;
1079 csk = lookup_tid(t, tid);
1080 if (unlikely(!csk)) {
1081 pr_err("can't find connection for tid %u.\n", tid);
1085 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1086 (&csk->saddr), (&csk->daddr),
1087 csk, csk->state, csk->flags, csk->tid, req->status);
1089 if (is_neg_adv(req->status))
1092 cxgbi_sock_get(csk);
1093 spin_lock_bh(&csk->lock);
1095 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1097 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1098 send_tx_flowc_wr(csk);
1099 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1102 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1103 cxgbi_sock_set_state(csk, CTP_ABORTING);
1105 send_abort_rpl(csk, rst_status);
1107 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1108 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1109 cxgbi_sock_closed(csk);
1112 spin_unlock_bh(&csk->lock);
1113 cxgbi_sock_put(csk);
1118 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1120 struct cxgbi_sock *csk;
1121 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1122 unsigned int tid = GET_TID(rpl);
1123 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1124 struct tid_info *t = lldi->tids;
1126 csk = lookup_tid(t, tid);
1131 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1132 (&csk->saddr), (&csk->daddr), csk,
1133 csk->state, csk->flags, csk->tid, rpl->status);
1135 if (rpl->status == CPL_ERR_ABORT_FAILED)
1138 cxgbi_sock_rcv_abort_rpl(csk);
1143 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1145 struct cxgbi_sock *csk;
1146 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1147 unsigned int tid = GET_TID(cpl);
1148 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1149 struct tid_info *t = lldi->tids;
1151 csk = lookup_tid(t, tid);
1153 pr_err("can't find connection for tid %u.\n", tid);
1155 /* not expecting this, reset the connection. */
1156 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1157 spin_lock_bh(&csk->lock);
1158 send_abort_req(csk);
1159 spin_unlock_bh(&csk->lock);
1164 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1166 struct cxgbi_sock *csk;
1167 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1168 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1169 unsigned int tid = GET_TID(cpl);
1170 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1171 struct tid_info *t = lldi->tids;
1173 csk = lookup_tid(t, tid);
1174 if (unlikely(!csk)) {
1175 pr_err("can't find conn. for tid %u.\n", tid);
1179 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1180 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1181 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1184 spin_lock_bh(&csk->lock);
1186 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1187 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1188 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1189 csk, csk->state, csk->flags, csk->tid);
1190 if (csk->state != CTP_ABORTING)
1196 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1197 cxgbi_skcb_flags(skb) = 0;
1199 skb_reset_transport_header(skb);
1200 __skb_pull(skb, sizeof(*cpl));
1201 __pskb_trim(skb, ntohs(cpl->len));
1203 if (!csk->skb_ulp_lhdr) {
1205 unsigned int hlen, dlen, plen;
1207 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1208 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1209 csk, csk->state, csk->flags, csk->tid, skb);
1210 csk->skb_ulp_lhdr = skb;
1211 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1213 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1214 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1215 csk->tid, cxgbi_skcb_tcp_seq(skb),
1221 hlen = ntohs(cpl->len);
1222 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1224 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1225 if (is_t4(lldi->adapter_type))
1228 if ((hlen + dlen) != plen) {
1229 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1230 "mismatch %u != %u + %u, seq 0x%x.\n",
1231 csk->tid, plen, hlen, dlen,
1232 cxgbi_skcb_tcp_seq(skb));
1236 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1238 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1239 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1241 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1242 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1243 csk, skb, *bhs, hlen, dlen,
1244 ntohl(*((unsigned int *)(bhs + 16))),
1245 ntohl(*((unsigned int *)(bhs + 24))));
1248 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1250 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1251 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1252 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1253 csk, csk->state, csk->flags, skb, lskb);
1256 __skb_queue_tail(&csk->receive_queue, skb);
1257 spin_unlock_bh(&csk->lock);
1261 send_abort_req(csk);
1263 spin_unlock_bh(&csk->lock);
1268 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1270 struct cxgbi_sock *csk;
1271 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1272 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1273 struct tid_info *t = lldi->tids;
1274 struct sk_buff *lskb;
1275 u32 tid = GET_TID(cpl);
1276 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1278 csk = lookup_tid(t, tid);
1279 if (unlikely(!csk)) {
1280 pr_err("can't find conn. for tid %u.\n", tid);
1284 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1285 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1286 csk, csk->state, csk->flags, csk->tid, skb,
1287 skb->len, pdu_len_ddp);
1289 spin_lock_bh(&csk->lock);
1291 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1292 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1293 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1294 csk, csk->state, csk->flags, csk->tid);
1296 if (csk->state != CTP_ABORTING)
1302 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1303 cxgbi_skcb_flags(skb) = 0;
1305 skb_reset_transport_header(skb);
1306 __skb_pull(skb, sizeof(*cpl));
1307 __pskb_trim(skb, ntohs(cpl->len));
1309 if (!csk->skb_ulp_lhdr)
1310 csk->skb_ulp_lhdr = skb;
1312 lskb = csk->skb_ulp_lhdr;
1313 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1315 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1316 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1317 csk, csk->state, csk->flags, skb, lskb);
1319 __skb_queue_tail(&csk->receive_queue, skb);
1320 spin_unlock_bh(&csk->lock);
1324 send_abort_req(csk);
1326 spin_unlock_bh(&csk->lock);
1332 cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1333 struct sk_buff *skb, u32 ddpvld)
1335 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1336 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1337 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1338 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1341 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1342 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1343 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1344 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1347 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1348 log_debug(1 << CXGBI_DBG_PDU_RX,
1349 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1351 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1354 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1355 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1356 log_debug(1 << CXGBI_DBG_PDU_RX,
1357 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1359 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1363 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1364 struct sk_buff *skb)
1366 struct cxgbi_sock *csk;
1367 struct sk_buff *lskb;
1368 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1369 unsigned int tid = GET_TID(rpl);
1370 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1371 struct tid_info *t = lldi->tids;
1372 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1374 csk = lookup_tid(t, tid);
1375 if (unlikely(!csk)) {
1376 pr_err("can't find connection for tid %u.\n", tid);
1380 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1381 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1382 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1384 spin_lock_bh(&csk->lock);
1386 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1387 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1388 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1389 csk, csk->state, csk->flags, csk->tid);
1390 if (csk->state != CTP_ABORTING)
1396 if (!csk->skb_ulp_lhdr) {
1397 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1401 lskb = csk->skb_ulp_lhdr;
1402 csk->skb_ulp_lhdr = NULL;
1404 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1406 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1407 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1408 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1410 cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1412 log_debug(1 << CXGBI_DBG_PDU_RX,
1413 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1414 csk, lskb, cxgbi_skcb_flags(lskb));
1416 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1417 cxgbi_conn_pdu_ready(csk);
1418 spin_unlock_bh(&csk->lock);
1422 send_abort_req(csk);
1424 spin_unlock_bh(&csk->lock);
1430 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1432 struct cxgbi_sock *csk;
1433 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1434 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1435 struct tid_info *t = lldi->tids;
1436 struct sk_buff *data_skb = NULL;
1437 u32 tid = GET_TID(rpl);
1438 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1439 u32 seq = be32_to_cpu(rpl->seq);
1440 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1442 csk = lookup_tid(t, tid);
1443 if (unlikely(!csk)) {
1444 pr_err("can't find connection for tid %u.\n", tid);
1448 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1449 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1450 "pdu_len_ddp %u, status %u.\n",
1451 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1452 ntohs(rpl->len), pdu_len_ddp, rpl->status);
1454 spin_lock_bh(&csk->lock);
1456 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1457 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1458 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1459 csk, csk->state, csk->flags, csk->tid);
1461 if (csk->state != CTP_ABORTING)
1467 cxgbi_skcb_tcp_seq(skb) = seq;
1468 cxgbi_skcb_flags(skb) = 0;
1469 cxgbi_skcb_rx_pdulen(skb) = 0;
1471 skb_reset_transport_header(skb);
1472 __skb_pull(skb, sizeof(*rpl));
1473 __pskb_trim(skb, be16_to_cpu(rpl->len));
1475 csk->rcv_nxt = seq + pdu_len_ddp;
1477 if (csk->skb_ulp_lhdr) {
1478 data_skb = skb_peek(&csk->receive_queue);
1480 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1481 pr_err("Error! freelist data not found 0x%p, tid %u\n",
1486 __skb_unlink(data_skb, &csk->receive_queue);
1488 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1490 __skb_queue_tail(&csk->receive_queue, skb);
1491 __skb_queue_tail(&csk->receive_queue, data_skb);
1493 __skb_queue_tail(&csk->receive_queue, skb);
1496 csk->skb_ulp_lhdr = NULL;
1498 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1499 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1500 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1501 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1503 cxgb4i_process_ddpvld(csk, skb, ddpvld);
1505 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1506 csk, skb, cxgbi_skcb_flags(skb));
1508 cxgbi_conn_pdu_ready(csk);
1509 spin_unlock_bh(&csk->lock);
1514 send_abort_req(csk);
1516 spin_unlock_bh(&csk->lock);
1521 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1523 struct cxgbi_sock *csk;
1524 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1525 unsigned int tid = GET_TID(rpl);
1526 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1527 struct tid_info *t = lldi->tids;
1529 csk = lookup_tid(t, tid);
1531 pr_err("can't find connection for tid %u.\n", tid);
1533 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1534 "csk 0x%p,%u,0x%lx,%u.\n",
1535 csk, csk->state, csk->flags, csk->tid);
1536 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1542 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1544 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1545 unsigned int tid = GET_TID(rpl);
1546 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1547 struct tid_info *t = lldi->tids;
1548 struct cxgbi_sock *csk;
1550 csk = lookup_tid(t, tid);
1552 pr_err("can't find conn. for tid %u.\n", tid);
1554 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1555 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1556 csk, csk->state, csk->flags, csk->tid, rpl->status);
1558 if (rpl->status != CPL_ERR_NONE)
1559 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1560 csk, tid, rpl->status);
1565 static int alloc_cpls(struct cxgbi_sock *csk)
1567 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1569 if (!csk->cpl_close)
1572 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1574 if (!csk->cpl_abort_req)
1577 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1579 if (!csk->cpl_abort_rpl)
1584 cxgbi_sock_free_cpl_skbs(csk);
1588 static inline void l2t_put(struct cxgbi_sock *csk)
1591 cxgb4_l2t_release(csk->l2t);
1593 cxgbi_sock_put(csk);
1597 static void release_offload_resources(struct cxgbi_sock *csk)
1599 struct cxgb4_lld_info *lldi;
1600 #if IS_ENABLED(CONFIG_IPV6)
1601 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1604 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1605 "csk 0x%p,%u,0x%lx,%u.\n",
1606 csk, csk->state, csk->flags, csk->tid);
1608 cxgbi_sock_free_cpl_skbs(csk);
1609 cxgbi_sock_purge_write_queue(csk);
1610 if (csk->wr_cred != csk->wr_max_cred) {
1611 cxgbi_sock_purge_wr_queue(csk);
1612 cxgbi_sock_reset_wr_list(csk);
1616 #if IS_ENABLED(CONFIG_IPV6)
1617 if (csk->csk_family == AF_INET6)
1618 cxgb4_clip_release(ndev,
1619 (const u32 *)&csk->saddr6.sin6_addr, 1);
1622 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1624 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1625 lldi = cxgbi_cdev_priv(csk->cdev);
1626 cxgb4_remove_tid(lldi->tids, 0, csk->tid,
1628 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1629 cxgbi_sock_put(csk);
1634 #ifdef CONFIG_CHELSIO_T4_DCB
1635 static inline u8 get_iscsi_dcb_state(struct net_device *ndev)
1637 return ndev->dcbnl_ops->getstate(ndev);
1640 static int select_priority(int pri_mask)
1644 return (ffs(pri_mask) - 1);
1647 static u8 get_iscsi_dcb_priority(struct net_device *ndev)
1652 struct dcb_app iscsi_dcb_app = {
1656 rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
1660 if (caps & DCB_CAP_DCBX_VER_IEEE) {
1661 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
1662 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
1663 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
1664 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
1665 rv = dcb_getapp(ndev, &iscsi_dcb_app);
1668 log_debug(1 << CXGBI_DBG_ISCSI,
1669 "iSCSI priority is set to %u\n", select_priority(rv));
1670 return select_priority(rv);
1674 static int init_act_open(struct cxgbi_sock *csk)
1676 struct cxgbi_device *cdev = csk->cdev;
1677 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1678 struct net_device *ndev = cdev->ports[csk->port_id];
1679 struct sk_buff *skb = NULL;
1680 struct neighbour *n = NULL;
1683 unsigned int rxq_idx;
1684 unsigned int size, size6;
1685 unsigned int linkspeed;
1686 unsigned int rcv_winf, snd_winf;
1687 #ifdef CONFIG_CHELSIO_T4_DCB
1690 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1691 "csk 0x%p,%u,0x%lx,%u.\n",
1692 csk, csk->state, csk->flags, csk->tid);
1694 if (csk->csk_family == AF_INET)
1695 daddr = &csk->daddr.sin_addr.s_addr;
1696 #if IS_ENABLED(CONFIG_IPV6)
1697 else if (csk->csk_family == AF_INET6)
1698 daddr = &csk->daddr6.sin6_addr;
1701 pr_err("address family 0x%x not supported\n", csk->csk_family);
1705 n = dst_neigh_lookup(csk->dst, daddr);
1708 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1712 if (!(n->nud_state & NUD_VALID))
1713 neigh_event_send(n, NULL);
1715 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1716 if (csk->atid < 0) {
1717 pr_err("%s, NO atid available.\n", ndev->name);
1718 goto rel_resource_without_clip;
1720 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1721 cxgbi_sock_get(csk);
1723 #ifdef CONFIG_CHELSIO_T4_DCB
1724 if (get_iscsi_dcb_state(ndev))
1725 priority = get_iscsi_dcb_priority(ndev);
1727 csk->dcb_priority = priority;
1728 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority);
1730 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1733 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1734 goto rel_resource_without_clip;
1736 cxgbi_sock_get(csk);
1738 #if IS_ENABLED(CONFIG_IPV6)
1739 if (csk->csk_family == AF_INET6)
1740 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1743 if (is_t4(lldi->adapter_type)) {
1744 size = sizeof(struct cpl_act_open_req);
1745 size6 = sizeof(struct cpl_act_open_req6);
1746 } else if (is_t5(lldi->adapter_type)) {
1747 size = sizeof(struct cpl_t5_act_open_req);
1748 size6 = sizeof(struct cpl_t5_act_open_req6);
1750 size = sizeof(struct cpl_t6_act_open_req);
1751 size6 = sizeof(struct cpl_t6_act_open_req6);
1754 if (csk->csk_family == AF_INET)
1755 skb = alloc_wr(size, 0, GFP_NOIO);
1756 #if IS_ENABLED(CONFIG_IPV6)
1758 skb = alloc_wr(size6, 0, GFP_NOIO);
1763 skb->sk = (struct sock *)csk;
1764 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1767 csk->mtu = dst_mtu(csk->dst);
1768 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1769 csk->tx_chan = cxgb4_port_chan(ndev);
1770 csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type,
1771 cxgb4_port_viid(ndev));
1772 step = lldi->ntxq / lldi->nchan;
1773 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1774 step = lldi->nrxq / lldi->nchan;
1775 rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);
1776 cdev->rxq_idx_cntr++;
1777 csk->rss_qid = lldi->rxq_ids[rxq_idx];
1778 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1779 csk->snd_win = cxgb4i_snd_win;
1780 csk->rcv_win = cxgb4i_rcv_win;
1781 if (cxgb4i_rcv_win <= 0) {
1782 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1783 rcv_winf = linkspeed / SPEED_10000;
1785 csk->rcv_win *= rcv_winf;
1787 if (cxgb4i_snd_win <= 0) {
1788 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1789 snd_winf = linkspeed / SPEED_10000;
1791 csk->snd_win *= snd_winf;
1793 csk->wr_cred = lldi->wr_cred -
1794 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1795 csk->wr_max_cred = csk->wr_cred;
1796 csk->wr_una_cred = 0;
1797 cxgbi_sock_reset_wr_list(csk);
1800 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1801 (&csk->saddr), (&csk->daddr), csk, csk->state,
1802 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1803 csk->mtu, csk->mss_idx, csk->smac_idx);
1805 /* must wait for either a act_open_rpl or act_open_establish */
1806 if (!try_module_get(cdev->owner)) {
1807 pr_err("%s, try_module_get failed.\n", ndev->name);
1811 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1812 if (csk->csk_family == AF_INET)
1813 send_act_open_req(csk, skb, csk->l2t);
1814 #if IS_ENABLED(CONFIG_IPV6)
1816 send_act_open_req6(csk, skb, csk->l2t);
1823 #if IS_ENABLED(CONFIG_IPV6)
1824 if (csk->csk_family == AF_INET6)
1825 cxgb4_clip_release(ndev,
1826 (const u32 *)&csk->saddr6.sin6_addr, 1);
1828 rel_resource_without_clip:
1836 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1837 [CPL_ACT_ESTABLISH] = do_act_establish,
1838 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1839 [CPL_PEER_CLOSE] = do_peer_close,
1840 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1841 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1842 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1843 [CPL_FW4_ACK] = do_fw4_ack,
1844 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1845 [CPL_ISCSI_DATA] = do_rx_iscsi_data,
1846 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1847 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1848 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1849 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
1850 [CPL_RX_DATA] = do_rx_data,
1853 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1857 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1858 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1860 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1861 cxgb4i_max_connect);
1865 cdev->csk_release_offload_resources = release_offload_resources;
1866 cdev->csk_push_tx_frames = push_tx_frames;
1867 cdev->csk_send_abort_req = send_abort_req;
1868 cdev->csk_send_close_req = send_close_req;
1869 cdev->csk_send_rx_credits = send_rx_credits;
1870 cdev->csk_alloc_cpls = alloc_cpls;
1871 cdev->csk_init_act_open = init_act_open;
1873 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1878 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1879 struct ulp_mem_io *req,
1880 unsigned int wr_len, unsigned int dlen,
1881 unsigned int pm_addr,
1884 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1885 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1887 INIT_ULPTX_WR(req, wr_len, 0, tid);
1888 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1890 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1891 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1892 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1893 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1894 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1895 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1897 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1898 idata->len = htonl(dlen);
1901 static struct sk_buff *
1902 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1903 struct cxgbi_ppm *ppm,
1904 unsigned int idx, unsigned int npods,
1907 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1908 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1909 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1910 sizeof(struct ulptx_idata) + dlen, 16);
1911 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1914 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1915 __func__, ppm->ndev->name, idx, npods);
1919 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1925 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1926 struct cxgbi_task_tag_info *ttinfo,
1927 unsigned int idx, unsigned int npods,
1928 struct scatterlist **sg_pp,
1929 unsigned int *sg_off)
1931 struct cxgbi_device *cdev = csk->cdev;
1932 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1934 struct ulp_mem_io *req;
1935 struct ulptx_idata *idata;
1936 struct cxgbi_pagepod *ppod;
1942 req = (struct ulp_mem_io *)skb->head;
1943 idata = (struct ulptx_idata *)(req + 1);
1944 ppod = (struct cxgbi_pagepod *)(idata + 1);
1946 for (i = 0; i < npods; i++, ppod++)
1947 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1949 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1950 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1951 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1953 spin_lock_bh(&csk->lock);
1954 cxgbi_sock_skb_entail(csk, skb);
1955 spin_unlock_bh(&csk->lock);
1960 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1961 struct cxgbi_task_tag_info *ttinfo)
1963 unsigned int pidx = ttinfo->idx;
1964 unsigned int npods = ttinfo->npods;
1965 unsigned int i, cnt;
1967 struct scatterlist *sg = ttinfo->sgl;
1968 unsigned int offset = 0;
1970 ttinfo->cid = csk->port_id;
1972 for (i = 0; i < npods; i += cnt, pidx += cnt) {
1975 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1976 cnt = ULPMEM_IDATA_MAX_NPPODS;
1977 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1986 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1987 int pg_idx, bool reply)
1989 struct sk_buff *skb;
1990 struct cpl_set_tcb_field *req;
1992 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1995 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1999 /* set up ulp page size */
2000 req = (struct cpl_set_tcb_field *)skb->head;
2001 INIT_TP_WR(req, csk->tid);
2002 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
2003 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
2004 req->word_cookie = htons(0);
2005 req->mask = cpu_to_be64(0x3 << 8);
2006 req->val = cpu_to_be64(pg_idx << 8);
2007 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2009 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2010 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
2012 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2016 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
2017 int hcrc, int dcrc, int reply)
2019 struct sk_buff *skb;
2020 struct cpl_set_tcb_field *req;
2025 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2029 csk->hcrc_len = (hcrc ? 4 : 0);
2030 csk->dcrc_len = (dcrc ? 4 : 0);
2031 /* set up ulp submode */
2032 req = (struct cpl_set_tcb_field *)skb->head;
2033 INIT_TP_WR(req, tid);
2034 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
2035 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
2036 req->word_cookie = htons(0);
2037 req->mask = cpu_to_be64(0x3 << 4);
2038 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
2039 (dcrc ? ULP_CRC_DATA : 0)) << 4);
2040 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2042 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2043 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
2045 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2049 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
2051 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
2052 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
2055 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
2057 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
2058 struct net_device *ndev = cdev->ports[0];
2059 struct cxgbi_tag_format tformat;
2063 if (!lldi->vr->iscsi.size) {
2064 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
2068 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
2069 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
2071 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
2072 for (i = 0; i < 4; i++)
2073 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
2075 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
2077 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
2078 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
2080 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
2081 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
2082 cdev->csk_ddp_set_map = ddp_set_map;
2083 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2084 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2085 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2086 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2087 cdev->cdev2ppm = cdev2ppm;
2092 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2094 struct cxgbi_device *cdev;
2095 struct port_info *pi;
2098 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2100 pr_info("t4 device 0x%p, register failed.\n", lldi);
2103 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2104 cdev, lldi->adapter_type, lldi->nports,
2105 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2106 lldi->nrxq, lldi->wr_cred);
2107 for (i = 0; i < lldi->nrxq; i++)
2108 log_debug(1 << CXGBI_DBG_DEV,
2109 "t4 0x%p, rxq id #%d: %u.\n",
2110 cdev, i, lldi->rxq_ids[i]);
2112 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2113 cdev->flags = CXGBI_FLAG_DEV_T4;
2114 cdev->pdev = lldi->pdev;
2115 cdev->ports = lldi->ports;
2116 cdev->nports = lldi->nports;
2117 cdev->mtus = lldi->mtus;
2118 cdev->nmtus = NMTUS;
2119 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2120 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2121 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2122 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2123 cdev->itp = &cxgb4i_iscsi_transport;
2124 cdev->owner = THIS_MODULE;
2126 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
2128 pr_info("cdev 0x%p,%s, pfvf %u.\n",
2129 cdev, lldi->ports[0]->name, cdev->pfvf);
2131 rc = cxgb4i_ddp_init(cdev);
2133 pr_info("t4 0x%p ddp init failed.\n", cdev);
2136 rc = cxgb4i_ofld_init(cdev);
2138 pr_info("t4 0x%p ofld init failed.\n", cdev);
2142 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
2143 &cxgb4i_host_template, cxgb4i_stt);
2147 for (i = 0; i < cdev->nports; i++) {
2148 pi = netdev_priv(lldi->ports[i]);
2149 cdev->hbas[i]->port_id = pi->port_id;
2154 cxgbi_device_unregister(cdev);
2155 return ERR_PTR(-ENOMEM);
2158 #define RX_PULL_LEN 128
2159 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2160 const struct pkt_gl *pgl)
2162 const struct cpl_act_establish *rpl;
2163 struct sk_buff *skb;
2165 struct cxgbi_device *cdev = handle;
2168 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2170 skb = alloc_wr(len, 0, GFP_ATOMIC);
2173 skb_copy_to_linear_data(skb, &rsp[1], len);
2175 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2176 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2177 pgl->va, be64_to_cpu(*rsp),
2178 be64_to_cpu(*(u64 *)pgl->va),
2182 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2187 rpl = (struct cpl_act_establish *)skb->data;
2188 opc = rpl->ot.opcode;
2189 log_debug(1 << CXGBI_DBG_TOE,
2190 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2191 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2192 if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {
2193 pr_err("No handler for opcode 0x%x.\n", opc);
2196 cxgb4i_cplhandlers[opc](cdev, skb);
2200 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2204 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2206 struct cxgbi_device *cdev = handle;
2209 case CXGB4_STATE_UP:
2210 pr_info("cdev 0x%p, UP.\n", cdev);
2212 case CXGB4_STATE_START_RECOVERY:
2213 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2214 /* close all connections */
2216 case CXGB4_STATE_DOWN:
2217 pr_info("cdev 0x%p, DOWN.\n", cdev);
2219 case CXGB4_STATE_DETACH:
2220 pr_info("cdev 0x%p, DETACH.\n", cdev);
2221 cxgbi_device_unregister(cdev);
2224 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2230 #ifdef CONFIG_CHELSIO_T4_DCB
2232 cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val,
2236 struct net_device *ndev;
2237 struct cxgbi_device *cdev = NULL;
2238 struct dcb_app_type *iscsi_app = data;
2239 struct cxgbi_ports_map *pmap;
2242 if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {
2243 if (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY)
2246 priority = iscsi_app->app.priority;
2247 } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {
2248 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)
2251 if (!iscsi_app->app.priority)
2254 priority = ffs(iscsi_app->app.priority) - 1;
2259 if (iscsi_app->app.protocol != 3260)
2262 log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n",
2263 iscsi_app->ifindex, priority);
2265 ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);
2269 cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port);
2277 for (i = 0; i < pmap->used; i++) {
2278 if (pmap->port_csk[i]) {
2279 struct cxgbi_sock *csk = pmap->port_csk[i];
2281 if (csk->dcb_priority != priority) {
2282 iscsi_conn_failure(csk->user_data,
2283 ISCSI_ERR_CONN_FAILED);
2284 pr_info("Restarting iSCSI connection %p with "
2285 "priority %u->%u.\n", csk,
2286 csk->dcb_priority, priority);
2294 static int __init cxgb4i_init_module(void)
2298 printk(KERN_INFO "%s", version);
2300 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2303 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
2305 #ifdef CONFIG_CHELSIO_T4_DCB
2306 pr_info("%s dcb enabled.\n", DRV_MODULE_NAME);
2307 register_dcbevent_notifier(&cxgb4_dcb_change);
2312 static void __exit cxgb4i_exit_module(void)
2314 #ifdef CONFIG_CHELSIO_T4_DCB
2315 unregister_dcbevent_notifier(&cxgb4_dcb_change);
2317 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2318 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2319 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2322 module_init(cxgb4i_init_module);
2323 module_exit(cxgb4i_exit_module);