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UBUNTU: Ubuntu-4.10.0-37.41
[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
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7b36b6e0 1/*
2 * cxgb4i.c: Chelsio T4 iSCSI driver.
3 *
1149a5ed 4 * Copyright (c) 2010-2015 Chelsio Communications, Inc.
7b36b6e0 5 *
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.
9 *
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Rakesh Ranjan (rranjan@chelsio.com)
12 */
13
14#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
15
28466e0f 16#include <linux/kernel.h>
7b36b6e0 17#include <linux/module.h>
18#include <linux/moduleparam.h>
19#include <scsi/scsi_host.h>
20#include <net/tcp.h>
21#include <net/dst.h>
22#include <linux/netdevice.h>
759a0cc5 23#include <net/addrconf.h>
7b36b6e0 24
3bd3e8bf 25#include "t4_regs.h"
7b36b6e0 26#include "t4_msg.h"
27#include "cxgb4.h"
28#include "cxgb4_uld.h"
29#include "t4fw_api.h"
30#include "l2t.h"
31#include "cxgb4i.h"
211a84e3 32#include "clip_tbl.h"
7b36b6e0 33
34static unsigned int dbg_level;
35
36#include "../libcxgbi.h"
37
38#define DRV_MODULE_NAME "cxgb4i"
3bd3e8bf 39#define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
0ea5bf3d
KX		 40#define DRV_MODULE_VERSION "0.9.5-ko"
41#define DRV_MODULE_RELDATE "Apr. 2015"
7b36b6e0 42
43static char version[] =
44 DRV_MODULE_DESC " " DRV_MODULE_NAME
0ea5bf3d 45 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
7b36b6e0 46
47MODULE_AUTHOR("Chelsio Communications, Inc.");
48MODULE_DESCRIPTION(DRV_MODULE_DESC);
49MODULE_VERSION(DRV_MODULE_VERSION);
50MODULE_LICENSE("GPL");
51
52module_param(dbg_level, uint, 0644);
53MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
54
81daf10c
KX		 55#define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
56static int cxgb4i_rcv_win = -1;
7b36b6e0 57module_param(cxgb4i_rcv_win, int, 0644);
58MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
59
81daf10c
KX		 60#define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
61static int cxgb4i_snd_win = -1;
7b36b6e0 62module_param(cxgb4i_snd_win, int, 0644);
63MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
64
65static int cxgb4i_rx_credit_thres = 10 * 1024;
66module_param(cxgb4i_rx_credit_thres, int, 0644);
67MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
68 "RX credits return threshold in bytes (default=10KB)");
69
70static unsigned int cxgb4i_max_connect = (8 * 1024);
71module_param(cxgb4i_max_connect, uint, 0644);
72MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
73
74static unsigned short cxgb4i_sport_base = 20000;
75module_param(cxgb4i_sport_base, ushort, 0644);
76MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
77
78typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
79
80static void *t4_uld_add(const struct cxgb4_lld_info *);
81static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
82static int t4_uld_state_change(void *, enum cxgb4_state state);
64bfead8 83static inline int send_tx_flowc_wr(struct cxgbi_sock *);
7b36b6e0 84
85static const struct cxgb4_uld_info cxgb4i_uld_info = {
86 .name = DRV_MODULE_NAME,
0fbc81b3 87 .nrxq = MAX_ULD_QSETS,
ab677ff4 88 .ntxq = MAX_ULD_QSETS,
0fbc81b3
HS		 89 .rxq_size = 1024,
90 .lro = false,
7b36b6e0 91 .add = t4_uld_add,
92 .rx_handler = t4_uld_rx_handler,
93 .state_change = t4_uld_state_change,
94};
95
96static struct scsi_host_template cxgb4i_host_template = {
97 .module = THIS_MODULE,
98 .name = DRV_MODULE_NAME,
99 .proc_name = DRV_MODULE_NAME,
100 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
101 .queuecommand = iscsi_queuecommand,
db5ed4df 102 .change_queue_depth = scsi_change_queue_depth,
7b36b6e0 103 .sg_tablesize = SG_ALL,
104 .max_sectors = 0xFFFF,
105 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
106 .eh_abort_handler = iscsi_eh_abort,
107 .eh_device_reset_handler = iscsi_eh_device_reset,
108 .eh_target_reset_handler = iscsi_eh_recover_target,
109 .target_alloc = iscsi_target_alloc,
110 .use_clustering = DISABLE_CLUSTERING,
111 .this_id = -1,
c40ecc12 112 .track_queue_depth = 1,
7b36b6e0 113};
114
115static struct iscsi_transport cxgb4i_iscsi_transport = {
116 .owner = THIS_MODULE,
117 .name = DRV_MODULE_NAME,
118 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
119 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
fdafd4df 120 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
3128c6c7 121 .attr_is_visible = cxgbi_attr_is_visible,
7b36b6e0 122 .get_host_param = cxgbi_get_host_param,
123 .set_host_param = cxgbi_set_host_param,
124 /* session management */
125 .create_session = cxgbi_create_session,
126 .destroy_session = cxgbi_destroy_session,
127 .get_session_param = iscsi_session_get_param,
128 /* connection management */
129 .create_conn = cxgbi_create_conn,
130 .bind_conn = cxgbi_bind_conn,
131 .destroy_conn = iscsi_tcp_conn_teardown,
132 .start_conn = iscsi_conn_start,
133 .stop_conn = iscsi_conn_stop,
c71b9b66 134 .get_conn_param = iscsi_conn_get_param,
7b36b6e0 135 .set_param = cxgbi_set_conn_param,
136 .get_stats = cxgbi_get_conn_stats,
137 /* pdu xmit req from user space */
138 .send_pdu = iscsi_conn_send_pdu,
139 /* task */
140 .init_task = iscsi_tcp_task_init,
141 .xmit_task = iscsi_tcp_task_xmit,
142 .cleanup_task = cxgbi_cleanup_task,
143 /* pdu */
144 .alloc_pdu = cxgbi_conn_alloc_pdu,
145 .init_pdu = cxgbi_conn_init_pdu,
146 .xmit_pdu = cxgbi_conn_xmit_pdu,
147 .parse_pdu_itt = cxgbi_parse_pdu_itt,
148 /* TCP connect/disconnect */
c71b9b66 149 .get_ep_param = cxgbi_get_ep_param,
7b36b6e0 150 .ep_connect = cxgbi_ep_connect,
151 .ep_poll = cxgbi_ep_poll,
152 .ep_disconnect = cxgbi_ep_disconnect,
153 /* Error recovery timeout call */
154 .session_recovery_timedout = iscsi_session_recovery_timedout,
155};
156
157static struct scsi_transport_template *cxgb4i_stt;
158
159/*
160 * CPL (Chelsio Protocol Language) defines a message passing interface between
161 * the host driver and Chelsio asic.
162 * The section below implments CPLs that related to iscsi tcp connection
163 * open/close/abort and data send/receive.
164 */
759a0cc5 165
7b36b6e0 166#define RCV_BUFSIZ_MASK 0x3FFU
d3074cce 167#define MAX_IMM_TX_PKT_LEN 256
7b36b6e0 168
7b36b6e0 169static int push_tx_frames(struct cxgbi_sock *, int);
170
171/*
172 * is_ofld_imm - check whether a packet can be sent as immediate data
173 * @skb: the packet
174 *
175 * Returns true if a packet can be sent as an offload WR with immediate
176 * data. We currently use the same limit as for Ethernet packets.
177 */
84944d8c 178static inline bool is_ofld_imm(const struct sk_buff *skb)
7b36b6e0 179{
84944d8c
KX		 180 int len = skb->len;
181
182 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
183 len += sizeof(struct fw_ofld_tx_data_wr);
184
185 return len <= MAX_IMM_TX_PKT_LEN;
7b36b6e0 186}
187
188static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
189 struct l2t_entry *e)
190{
3bd3e8bf 191 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
7b36b6e0 192 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
193 unsigned long long opt0;
194 unsigned int opt2;
195 unsigned int qid_atid = ((unsigned int)csk->atid) |
196 (((unsigned int)csk->rss_qid) << 14);
197
d7990b0c
AB		 198 opt0 = KEEP_ALIVE_F |
199 WND_SCALE_V(wscale) |
200 MSS_IDX_V(csk->mss_idx) |
201 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
202 TX_CHAN_V(csk->tx_chan) |
203 SMAC_SEL_V(csk->smac_idx) |
204 ULP_MODE_V(ULP_MODE_ISCSI) |
81daf10c 205 RCV_BUFSIZ_V(csk->rcv_win >> 10);
1eb88a5d 206
d7990b0c
AB		 207 opt2 = RX_CHANNEL_V(0) |
208 RSS_QUEUE_VALID_F |
d7990b0c 209 RSS_QUEUE_V(csk->rss_qid);
7b36b6e0 210
3bd3e8bf
KX		 211 if (is_t4(lldi->adapter_type)) {
212 struct cpl_act_open_req *req =
213 (struct cpl_act_open_req *)skb->head;
214
3bd3e8bf
KX		 215 INIT_TP_WR(req, 0);
216 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
7b36b6e0 217 qid_atid));
3bd3e8bf
KX		 218 req->local_port = csk->saddr.sin_port;
219 req->peer_port = csk->daddr.sin_port;
220 req->local_ip = csk->saddr.sin_addr.s_addr;
221 req->peer_ip = csk->daddr.sin_addr.s_addr;
222 req->opt0 = cpu_to_be64(opt0);
ac0245ff
KX		 223 req->params = cpu_to_be32(cxgb4_select_ntuple(
224 csk->cdev->ports[csk->port_id],
225 csk->l2t));
d7990b0c 226 opt2 |= RX_FC_VALID_F;
3bd3e8bf 227 req->opt2 = cpu_to_be32(opt2);
7b36b6e0 228
3bd3e8bf
KX		 229 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
230 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
231 csk, &req->local_ip, ntohs(req->local_port),
232 &req->peer_ip, ntohs(req->peer_port),
233 csk->atid, csk->rss_qid);
586be7cb 234 } else if (is_t5(lldi->adapter_type)) {
3bd3e8bf
KX		 235 struct cpl_t5_act_open_req *req =
236 (struct cpl_t5_act_open_req *)skb->head;
1eb88a5d 237 u32 isn = (prandom_u32() & ~7UL) - 1;
3bd3e8bf 238
3bd3e8bf
KX		 239 INIT_TP_WR(req, 0);
240 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
241 qid_atid));
242 req->local_port = csk->saddr.sin_port;
243 req->peer_port = csk->daddr.sin_port;
244 req->local_ip = csk->saddr.sin_addr.s_addr;
245 req->peer_ip = csk->daddr.sin_addr.s_addr;
246 req->opt0 = cpu_to_be64(opt0);
d7990b0c 247 req->params = cpu_to_be64(FILTER_TUPLE_V(
ac0245ff
KX		 248 cxgb4_select_ntuple(
249 csk->cdev->ports[csk->port_id],
250 csk->l2t)));
1eb88a5d
KX		 251 req->rsvd = cpu_to_be32(isn);
252 opt2 |= T5_ISS_VALID;
253 opt2 |= T5_OPT_2_VALID_F;
254
3bd3e8bf
KX		 255 req->opt2 = cpu_to_be32(opt2);
256
257 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
258 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
259 csk, &req->local_ip, ntohs(req->local_port),
260 &req->peer_ip, ntohs(req->peer_port),
261 csk->atid, csk->rss_qid);
586be7cb
VP		 262 } else {
263 struct cpl_t6_act_open_req *req =
264 (struct cpl_t6_act_open_req *)skb->head;
265 u32 isn = (prandom_u32() & ~7UL) - 1;
266
267 INIT_TP_WR(req, 0);
268 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
269 qid_atid));
270 req->local_port = csk->saddr.sin_port;
271 req->peer_port = csk->daddr.sin_port;
272 req->local_ip = csk->saddr.sin_addr.s_addr;
273 req->peer_ip = csk->daddr.sin_addr.s_addr;
274 req->opt0 = cpu_to_be64(opt0);
275 req->params = cpu_to_be64(FILTER_TUPLE_V(
276 cxgb4_select_ntuple(
277 csk->cdev->ports[csk->port_id],
278 csk->l2t)));
279 req->rsvd = cpu_to_be32(isn);
280
281 opt2 |= T5_ISS_VALID;
282 opt2 |= RX_FC_DISABLE_F;
283 opt2 |= T5_OPT_2_VALID_F;
284
285 req->opt2 = cpu_to_be32(opt2);
286 req->rsvd2 = cpu_to_be32(0);
287 req->opt3 = cpu_to_be32(0);
288
289 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
290 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
291 csk, &req->local_ip, ntohs(req->local_port),
292 &req->peer_ip, ntohs(req->peer_port),
293 csk->atid, csk->rss_qid);
3bd3e8bf
KX		 294 }
295
296 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
759a0cc5
AB		 297
298 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
586be7cb
VP		 299 (&csk->saddr), (&csk->daddr),
300 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
759a0cc5
AB		 301 csk->state, csk->flags, csk->atid, csk->rss_qid);
302
303 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
304}
305
f42bb57c 306#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 307static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
308 struct l2t_entry *e)
309{
310 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
759a0cc5
AB		 311 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
312 unsigned long long opt0;
313 unsigned int opt2;
314 unsigned int qid_atid = ((unsigned int)csk->atid) |
315 (((unsigned int)csk->rss_qid) << 14);
316
d7990b0c
AB		 317 opt0 = KEEP_ALIVE_F |
318 WND_SCALE_V(wscale) |
319 MSS_IDX_V(csk->mss_idx) |
320 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
321 TX_CHAN_V(csk->tx_chan) |
322 SMAC_SEL_V(csk->smac_idx) |
323 ULP_MODE_V(ULP_MODE_ISCSI) |
81daf10c 324 RCV_BUFSIZ_V(csk->rcv_win >> 10);
759a0cc5 325
d7990b0c
AB		 326 opt2 = RX_CHANNEL_V(0) |
327 RSS_QUEUE_VALID_F |
d7990b0c 328 RSS_QUEUE_V(csk->rss_qid);
759a0cc5 329
586be7cb 330 if (is_t4(lldi->adapter_type)) {
759a0cc5
AB		 331 struct cpl_act_open_req6 *req =
332 (struct cpl_act_open_req6 *)skb->head;
333
334 INIT_TP_WR(req, 0);
335 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
336 qid_atid));
337 req->local_port = csk->saddr6.sin6_port;
338 req->peer_port = csk->daddr6.sin6_port;
339
340 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
341 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
342 8);
343 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
344 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
345 8);
346
347 req->opt0 = cpu_to_be64(opt0);
348
d7990b0c 349 opt2 |= RX_FC_VALID_F;
759a0cc5
AB		 350 req->opt2 = cpu_to_be32(opt2);
351
352 req->params = cpu_to_be32(cxgb4_select_ntuple(
353 csk->cdev->ports[csk->port_id],
354 csk->l2t));
586be7cb 355 } else if (is_t5(lldi->adapter_type)) {
759a0cc5
AB		 356 struct cpl_t5_act_open_req6 *req =
357 (struct cpl_t5_act_open_req6 *)skb->head;
358
359 INIT_TP_WR(req, 0);
360 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
361 qid_atid));
362 req->local_port = csk->saddr6.sin6_port;
363 req->peer_port = csk->daddr6.sin6_port;
364 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
365 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
366 8);
367 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
368 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
369 8);
370 req->opt0 = cpu_to_be64(opt0);
371
d7990b0c 372 opt2 |= T5_OPT_2_VALID_F;
759a0cc5
AB		 373 req->opt2 = cpu_to_be32(opt2);
374
d7990b0c 375 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
759a0cc5
AB		 376 csk->cdev->ports[csk->port_id],
377 csk->l2t)));
586be7cb
VP		 378 } else {
379 struct cpl_t6_act_open_req6 *req =
380 (struct cpl_t6_act_open_req6 *)skb->head;
381
382 INIT_TP_WR(req, 0);
383 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
384 qid_atid));
385 req->local_port = csk->saddr6.sin6_port;
386 req->peer_port = csk->daddr6.sin6_port;
387 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
388 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
389 8);
390 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
391 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
392 8);
393 req->opt0 = cpu_to_be64(opt0);
394
395 opt2 |= RX_FC_DISABLE_F;
396 opt2 |= T5_OPT_2_VALID_F;
397
398 req->opt2 = cpu_to_be32(opt2);
399
400 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
401 csk->cdev->ports[csk->port_id],
402 csk->l2t)));
403
404 req->rsvd2 = cpu_to_be32(0);
405 req->opt3 = cpu_to_be32(0);
759a0cc5
AB		 406 }
407
408 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
409
410 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
586be7cb
VP		 411 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
412 csk->flags, csk->atid,
759a0cc5
AB		 413 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
414 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
415 csk->rss_qid);
416
7b36b6e0 417 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
418}
f42bb57c 419#endif
7b36b6e0 420
421static void send_close_req(struct cxgbi_sock *csk)
422{
423 struct sk_buff *skb = csk->cpl_close;
424 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
425 unsigned int tid = csk->tid;
426
427 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
428 "csk 0x%p,%u,0x%lx, tid %u.\n",
429 csk, csk->state, csk->flags, csk->tid);
430 csk->cpl_close = NULL;
431 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
432 INIT_TP_WR(req, tid);
433 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
434 req->rsvd = 0;
435
436 cxgbi_sock_skb_entail(csk, skb);
437 if (csk->state >= CTP_ESTABLISHED)
438 push_tx_frames(csk, 1);
439}
440
441static void abort_arp_failure(void *handle, struct sk_buff *skb)
442{
443 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
444 struct cpl_abort_req *req;
445
446 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
447 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
448 csk, csk->state, csk->flags, csk->tid);
449 req = (struct cpl_abort_req *)skb->data;
450 req->cmd = CPL_ABORT_NO_RST;
451 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
452}
453
454static void send_abort_req(struct cxgbi_sock *csk)
455{
456 struct cpl_abort_req *req;
457 struct sk_buff *skb = csk->cpl_abort_req;
458
459 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
460 return;
64bfead8
KX		 461
462 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
463 send_tx_flowc_wr(csk);
464 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
465 }
466
7b36b6e0 467 cxgbi_sock_set_state(csk, CTP_ABORTING);
468 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
469 cxgbi_sock_purge_write_queue(csk);
470
471 csk->cpl_abort_req = NULL;
472 req = (struct cpl_abort_req *)skb->head;
2126bc5e 473 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
7b36b6e0 474 req->cmd = CPL_ABORT_SEND_RST;
475 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
476 INIT_TP_WR(req, csk->tid);
477 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
478 req->rsvd0 = htonl(csk->snd_nxt);
479 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
480
481 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
482 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
483 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
484 req->rsvd1);
485
486 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
487}
488
489static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
490{
491 struct sk_buff *skb = csk->cpl_abort_rpl;
492 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
493
494 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
495 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
496 csk, csk->state, csk->flags, csk->tid, rst_status);
497
498 csk->cpl_abort_rpl = NULL;
2126bc5e 499 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
7b36b6e0 500 INIT_TP_WR(rpl, csk->tid);
501 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
502 rpl->cmd = rst_status;
503 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
504}
505
506/*
507 * CPL connection rx data ack: host ->
508 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
509 * credits sent.
510 */
511static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
512{
513 struct sk_buff *skb;
514 struct cpl_rx_data_ack *req;
515
516 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
517 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
518 csk, csk->state, csk->flags, csk->tid, credits);
519
24d3f95a 520 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
7b36b6e0 521 if (!skb) {
522 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
523 return 0;
524 }
525 req = (struct cpl_rx_data_ack *)skb->head;
526
527 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
528 INIT_TP_WR(req, csk->tid);
529 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
530 csk->tid));
d7990b0c
AB		 531 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
532 | RX_FORCE_ACK_F);
7b36b6e0 533 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
534 return credits;
535}
536
537/*
538 * sgl_len - calculates the size of an SGL of the given capacity
539 * @n: the number of SGL entries
540 * Calculates the number of flits needed for a scatter/gather list that
541 * can hold the given number of entries.
542 */
543static inline unsigned int sgl_len(unsigned int n)
544{
545 n--;
546 return (3 * n) / 2 + (n & 1) + 2;
547}
548
549/*
550 * calc_tx_flits_ofld - calculate # of flits for an offload packet
551 * @skb: the packet
552 *
553 * Returns the number of flits needed for the given offload packet.
554 * These packets are already fully constructed and no additional headers
555 * will be added.
556 */
557static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
558{
559 unsigned int flits, cnt;
560
561 if (is_ofld_imm(skb))
562 return DIV_ROUND_UP(skb->len, 8);
563 flits = skb_transport_offset(skb) / 8;
564 cnt = skb_shinfo(skb)->nr_frags;
499e2e6f 565 if (skb_tail_pointer(skb) != skb_transport_header(skb))
7b36b6e0 566 cnt++;
567 return flits + sgl_len(cnt);
568}
569
64bfead8
KX		 570#define FLOWC_WR_NPARAMS_MIN 9
571static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
572{
573 int nparams, flowclen16, flowclen;
574
575 nparams = FLOWC_WR_NPARAMS_MIN;
576 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
577 flowclen16 = DIV_ROUND_UP(flowclen, 16);
578 flowclen = flowclen16 * 16;
579 /*
580 * Return the number of 16-byte credits used by the FlowC request.
581 * Pass back the nparams and actual FlowC length if requested.
582 */
583 if (nparamsp)
584 *nparamsp = nparams;
585 if (flowclenp)
586 *flowclenp = flowclen;
587
588 return flowclen16;
589}
590
591static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
7b36b6e0 592{
593 struct sk_buff *skb;
594 struct fw_flowc_wr *flowc;
64bfead8 595 int nparams, flowclen16, flowclen;
7b36b6e0 596
64bfead8 597 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
24d3f95a 598 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
7b36b6e0 599 flowc = (struct fw_flowc_wr *)skb->head;
600 flowc->op_to_nparams =
64bfead8 601 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
7b36b6e0 602 flowc->flowid_len16 =
64bfead8 603 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
7b36b6e0 604 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
e27d6169 605 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
7b36b6e0 606 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
607 flowc->mnemval[1].val = htonl(csk->tx_chan);
608 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
609 flowc->mnemval[2].val = htonl(csk->tx_chan);
610 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
611 flowc->mnemval[3].val = htonl(csk->rss_qid);
612 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
613 flowc->mnemval[4].val = htonl(csk->snd_nxt);
614 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
615 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
616 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
81daf10c 617 flowc->mnemval[6].val = htonl(csk->snd_win);
7b36b6e0 618 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
619 flowc->mnemval[7].val = htonl(csk->advmss);
620 flowc->mnemval[8].mnemonic = 0;
621 flowc->mnemval[8].val = 0;
64bfead8
KX		 622 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
623 flowc->mnemval[8].val = 16384;
624
2126bc5e 625 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
7b36b6e0 626
627 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
628 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
629 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
81daf10c 630 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
7b36b6e0 631 csk->advmss);
632
633 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
64bfead8
KX		 634
635 return flowclen16;
7b36b6e0 636}
637
638static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
639 int dlen, int len, u32 credits, int compl)
640{
641 struct fw_ofld_tx_data_wr *req;
642 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
e2ac9628 643 unsigned int wr_ulp_mode = 0, val;
7857c62a 644 bool imm = is_ofld_imm(skb);
7b36b6e0 645
646 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
647
7857c62a 648 if (imm) {
e2ac9628
HS		 649 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
650 FW_WR_COMPL_F |
651 FW_WR_IMMDLEN_V(dlen));
652 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
653 FW_WR_LEN16_V(credits));
7b36b6e0 654 } else {
655 req->op_to_immdlen =
e2ac9628
HS		 656 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
657 FW_WR_COMPL_F |
658 FW_WR_IMMDLEN_V(0));
7b36b6e0 659 req->flowid_len16 =
e2ac9628
HS		 660 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
661 FW_WR_LEN16_V(credits));
7b36b6e0 662 }
663 if (submode)
e2ac9628
HS		 664 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
665 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
666 val = skb_peek(&csk->write_queue) ? 0 : 1;
6aca4112 667 req->tunnel_to_proxy = htonl(wr_ulp_mode |
e2ac9628 668 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
7b36b6e0 669 req->plen = htonl(len);
670 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
671 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
672}
673
674static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
675{
676 kfree_skb(skb);
677}
678
679static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
680{
681 int total_size = 0;
682 struct sk_buff *skb;
683
684 if (unlikely(csk->state < CTP_ESTABLISHED ||
685 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
686 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
687 1 << CXGBI_DBG_PDU_TX,
688 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
689 csk, csk->state, csk->flags, csk->tid);
690 return 0;
691 }
692
693 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
694 int dlen = skb->len;
695 int len = skb->len;
696 unsigned int credits_needed;
64bfead8 697 int flowclen16 = 0;
7b36b6e0 698
699 skb_reset_transport_header(skb);
700 if (is_ofld_imm(skb))
84944d8c 701 credits_needed = DIV_ROUND_UP(dlen, 16);
7b36b6e0 702 else
84944d8c
KX		 703 credits_needed = DIV_ROUND_UP(
704 8 * calc_tx_flits_ofld(skb),
705 16);
706
707 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
708 credits_needed += DIV_ROUND_UP(
709 sizeof(struct fw_ofld_tx_data_wr),
7b36b6e0 710 16);
711
64bfead8
KX		 712 /*
713 * Assumes the initial credits is large enough to support
714 * fw_flowc_wr plus largest possible first payload
715 */
716 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
717 flowclen16 = send_tx_flowc_wr(csk);
718 csk->wr_cred -= flowclen16;
719 csk->wr_una_cred += flowclen16;
720 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
721 }
722
7b36b6e0 723 if (csk->wr_cred < credits_needed) {
724 log_debug(1 << CXGBI_DBG_PDU_TX,
725 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
726 csk, skb->len, skb->data_len,
727 credits_needed, csk->wr_cred);
728 break;
729 }
730 __skb_unlink(skb, &csk->write_queue);
2126bc5e 731 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
64bfead8 732 skb->csum = credits_needed + flowclen16;
7b36b6e0 733 csk->wr_cred -= credits_needed;
734 csk->wr_una_cred += credits_needed;
735 cxgbi_sock_enqueue_wr(csk, skb);
736
737 log_debug(1 << CXGBI_DBG_PDU_TX,
738 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
739 csk, skb->len, skb->data_len, credits_needed,
740 csk->wr_cred, csk->wr_una_cred);
741
742 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
7b36b6e0 743 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
744 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
745 req_completion);
746 csk->snd_nxt += len;
747 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
fe9b34bf
VP		 748 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
749 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
750 struct cpl_close_con_req *req =
751 (struct cpl_close_con_req *)skb->data;
752 req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
7b36b6e0 753 }
754 total_size += skb->truesize;
755 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
756
757 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
758 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
759 csk, csk->state, csk->flags, csk->tid, skb, len);
760
761 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
762 }
763 return total_size;
764}
765
766static inline void free_atid(struct cxgbi_sock *csk)
767{
768 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
769
770 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
771 cxgb4_free_atid(lldi->tids, csk->atid);
772 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
773 cxgbi_sock_put(csk);
774 }
775}
776
777static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
778{
779 struct cxgbi_sock *csk;
780 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
781 unsigned short tcp_opt = ntohs(req->tcp_opt);
782 unsigned int tid = GET_TID(req);
6c53e938 783 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
7b36b6e0 784 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
785 struct tid_info *t = lldi->tids;
786 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
787
788 csk = lookup_atid(t, atid);
789 if (unlikely(!csk)) {
790 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
791 goto rel_skb;
792 }
793
e27d6169 794 if (csk->atid != atid) {
795 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
796 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
797 goto rel_skb;
798 }
799
759a0cc5
AB		 800 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
801 (&csk->saddr), (&csk->daddr),
802 atid, tid, csk, csk->state, csk->flags, rcv_isn);
803
1fe1fdb0 804 module_put(cdev->owner);
7b36b6e0 805
806 cxgbi_sock_get(csk);
807 csk->tid = tid;
808 cxgb4_insert_tid(lldi->tids, csk, tid);
809 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
810
811 free_atid(csk);
812
813 spin_lock_bh(&csk->lock);
814 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
815 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
816 csk, csk->state, csk->flags, csk->tid);
817
818 if (csk->retry_timer.function) {
819 del_timer(&csk->retry_timer);
820 csk->retry_timer.function = NULL;
821 }
822
823 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
824 /*
825 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
826 * pass through opt0.
827 */
81daf10c
KX		 828 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
829 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
7b36b6e0 830
6c53e938
HS		 831 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
832 if (TCPOPT_TSTAMP_G(tcp_opt))
7b36b6e0 833 csk->advmss -= 12;
834 if (csk->advmss < 128)
835 csk->advmss = 128;
836
837 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
838 "csk 0x%p, mss_idx %u, advmss %u.\n",
6c53e938 839 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
7b36b6e0 840
841 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
842
843 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
844 send_abort_req(csk);
845 else {
846 if (skb_queue_len(&csk->write_queue))
847 push_tx_frames(csk, 0);
848 cxgbi_conn_tx_open(csk);
849 }
850 spin_unlock_bh(&csk->lock);
851
852rel_skb:
853 __kfree_skb(skb);
854}
855
856static int act_open_rpl_status_to_errno(int status)
857{
858 switch (status) {
859 case CPL_ERR_CONN_RESET:
860 return -ECONNREFUSED;
861 case CPL_ERR_ARP_MISS:
862 return -EHOSTUNREACH;
863 case CPL_ERR_CONN_TIMEDOUT:
864 return -ETIMEDOUT;
865 case CPL_ERR_TCAM_FULL:
866 return -ENOMEM;
867 case CPL_ERR_CONN_EXIST:
868 return -EADDRINUSE;
869 default:
870 return -EIO;
871 }
872}
873
874static void csk_act_open_retry_timer(unsigned long data)
875{
001586a7 876 struct sk_buff *skb = NULL;
7b36b6e0 877 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
3bd3e8bf 878 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
759a0cc5
AB		 879 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
880 struct l2t_entry *);
881 int t4 = is_t4(lldi->adapter_type), size, size6;
7b36b6e0 882
883 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
884 "csk 0x%p,%u,0x%lx,%u.\n",
885 csk, csk->state, csk->flags, csk->tid);
886
887 cxgbi_sock_get(csk);
888 spin_lock_bh(&csk->lock);
759a0cc5
AB		 889
890 if (t4) {
891 size = sizeof(struct cpl_act_open_req);
892 size6 = sizeof(struct cpl_act_open_req6);
893 } else {
894 size = sizeof(struct cpl_t5_act_open_req);
895 size6 = sizeof(struct cpl_t5_act_open_req6);
896 }
897
898 if (csk->csk_family == AF_INET) {
899 send_act_open_func = send_act_open_req;
900 skb = alloc_wr(size, 0, GFP_ATOMIC);
f42bb57c 901#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 902 } else {
903 send_act_open_func = send_act_open_req6;
904 skb = alloc_wr(size6, 0, GFP_ATOMIC);
f42bb57c 905#endif
759a0cc5
AB		 906 }
907
7b36b6e0 908 if (!skb)
909 cxgbi_sock_fail_act_open(csk, -ENOMEM);
910 else {
911 skb->sk = (struct sock *)csk;
912 t4_set_arp_err_handler(skb, csk,
759a0cc5
AB		 913 cxgbi_sock_act_open_req_arp_failure);
914 send_act_open_func(csk, skb, csk->l2t);
7b36b6e0 915 }
759a0cc5 916
7b36b6e0 917 spin_unlock_bh(&csk->lock);
918 cxgbi_sock_put(csk);
759a0cc5 919
7b36b6e0 920}
921
928567ad
KX		 922static inline bool is_neg_adv(unsigned int status)
923{
924 return status == CPL_ERR_RTX_NEG_ADVICE ||
925 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
926 status == CPL_ERR_PERSIST_NEG_ADVICE;
927}
928
7b36b6e0 929static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
930{
931 struct cxgbi_sock *csk;
932 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
933 unsigned int tid = GET_TID(rpl);
934 unsigned int atid =
6c53e938
HS		 935 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
936 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
7b36b6e0 937 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
938 struct tid_info *t = lldi->tids;
939
940 csk = lookup_atid(t, atid);
941 if (unlikely(!csk)) {
942 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
943 goto rel_skb;
944 }
945
759a0cc5
AB		 946 pr_info_ipaddr("tid %u/%u, status %u.\n"
947 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
948 atid, tid, status, csk, csk->state, csk->flags);
7b36b6e0 949
928567ad 950 if (is_neg_adv(status))
150cca7c
KX		 951 goto rel_skb;
952
1fe1fdb0 953 module_put(cdev->owner);
ee7255ad 954
7b36b6e0 955 if (status && status != CPL_ERR_TCAM_FULL &&
956 status != CPL_ERR_CONN_EXIST &&
957 status != CPL_ERR_ARP_MISS)
958 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
959
960 cxgbi_sock_get(csk);
961 spin_lock_bh(&csk->lock);
962
963 if (status == CPL_ERR_CONN_EXIST &&
964 csk->retry_timer.function != csk_act_open_retry_timer) {
965 csk->retry_timer.function = csk_act_open_retry_timer;
966 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
967 } else
968 cxgbi_sock_fail_act_open(csk,
969 act_open_rpl_status_to_errno(status));
970
971 spin_unlock_bh(&csk->lock);
972 cxgbi_sock_put(csk);
973rel_skb:
974 __kfree_skb(skb);
975}
976
977static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
978{
979 struct cxgbi_sock *csk;
980 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
981 unsigned int tid = GET_TID(req);
982 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
983 struct tid_info *t = lldi->tids;
984
985 csk = lookup_tid(t, tid);
986 if (unlikely(!csk)) {
987 pr_err("can't find connection for tid %u.\n", tid);
988 goto rel_skb;
989 }
759a0cc5
AB		 990 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
991 (&csk->saddr), (&csk->daddr),
992 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 993 cxgbi_sock_rcv_peer_close(csk);
994rel_skb:
995 __kfree_skb(skb);
996}
997
998static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
999{
1000 struct cxgbi_sock *csk;
1001 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1002 unsigned int tid = GET_TID(rpl);
1003 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1004 struct tid_info *t = lldi->tids;
1005
1006 csk = lookup_tid(t, tid);
1007 if (unlikely(!csk)) {
1008 pr_err("can't find connection for tid %u.\n", tid);
1009 goto rel_skb;
1010 }
759a0cc5
AB		 1011 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1012 (&csk->saddr), (&csk->daddr),
1013 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 1014 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1015rel_skb:
1016 __kfree_skb(skb);
1017}
1018
1019static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1020 int *need_rst)
1021{
1022 switch (abort_reason) {
1023 case CPL_ERR_BAD_SYN: /* fall through */
1024 case CPL_ERR_CONN_RESET:
1025 return csk->state > CTP_ESTABLISHED ?
1026 -EPIPE : -ECONNRESET;
1027 case CPL_ERR_XMIT_TIMEDOUT:
1028 case CPL_ERR_PERSIST_TIMEDOUT:
1029 case CPL_ERR_FINWAIT2_TIMEDOUT:
1030 case CPL_ERR_KEEPALIVE_TIMEDOUT:
1031 return -ETIMEDOUT;
1032 default:
1033 return -EIO;
1034 }
1035}
1036
1037static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1038{
1039 struct cxgbi_sock *csk;
1040 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1041 unsigned int tid = GET_TID(req);
1042 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1043 struct tid_info *t = lldi->tids;
1044 int rst_status = CPL_ABORT_NO_RST;
1045
1046 csk = lookup_tid(t, tid);
1047 if (unlikely(!csk)) {
1048 pr_err("can't find connection for tid %u.\n", tid);
1049 goto rel_skb;
1050 }
1051
759a0cc5
AB		 1052 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1053 (&csk->saddr), (&csk->daddr),
1054 csk, csk->state, csk->flags, csk->tid, req->status);
7b36b6e0 1055
928567ad 1056 if (is_neg_adv(req->status))
7b36b6e0 1057 goto rel_skb;
1058
1059 cxgbi_sock_get(csk);
1060 spin_lock_bh(&csk->lock);
1061
7b07bf24
AB		 1062 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1063
1064 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1065 send_tx_flowc_wr(csk);
1066 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
7b36b6e0 1067 }
1068
7b07bf24
AB		 1069 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1070 cxgbi_sock_set_state(csk, CTP_ABORTING);
1071
7b36b6e0 1072 send_abort_rpl(csk, rst_status);
1073
1074 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1075 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1076 cxgbi_sock_closed(csk);
1077 }
7b07bf24 1078
7b36b6e0 1079 spin_unlock_bh(&csk->lock);
1080 cxgbi_sock_put(csk);
1081rel_skb:
1082 __kfree_skb(skb);
1083}
1084
1085static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1086{
1087 struct cxgbi_sock *csk;
1088 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1089 unsigned int tid = GET_TID(rpl);
1090 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1091 struct tid_info *t = lldi->tids;
1092
1093 csk = lookup_tid(t, tid);
1094 if (!csk)
1095 goto rel_skb;
1096
759a0cc5
AB		 1097 if (csk)
1098 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1099 (&csk->saddr), (&csk->daddr), csk,
1100 csk->state, csk->flags, csk->tid, rpl->status);
7b36b6e0 1101
1102 if (rpl->status == CPL_ERR_ABORT_FAILED)
1103 goto rel_skb;
1104
1105 cxgbi_sock_rcv_abort_rpl(csk);
1106rel_skb:
1107 __kfree_skb(skb);
1108}
1109
f7bcd2e1
KX		 1110static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1111{
1112 struct cxgbi_sock *csk;
1113 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1114 unsigned int tid = GET_TID(cpl);
1115 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1116 struct tid_info *t = lldi->tids;
1117
1118 csk = lookup_tid(t, tid);
1119 if (!csk) {
1120 pr_err("can't find connection for tid %u.\n", tid);
1121 } else {
1122 /* not expecting this, reset the connection. */
1123 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1124 spin_lock_bh(&csk->lock);
1125 send_abort_req(csk);
1126 spin_unlock_bh(&csk->lock);
1127 }
1128 __kfree_skb(skb);
1129}
1130
7b36b6e0 1131static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1132{
1133 struct cxgbi_sock *csk;
1134 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1135 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1136 unsigned int tid = GET_TID(cpl);
1137 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1138 struct tid_info *t = lldi->tids;
7b36b6e0 1139
1140 csk = lookup_tid(t, tid);
1141 if (unlikely(!csk)) {
1142 pr_err("can't find conn. for tid %u.\n", tid);
1143 goto rel_skb;
1144 }
1145
1146 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1147 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1148 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1149 pdu_len_ddp);
1150
1151 spin_lock_bh(&csk->lock);
1152
1153 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1154 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1155 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1156 csk, csk->state, csk->flags, csk->tid);
1157 if (csk->state != CTP_ABORTING)
1158 goto abort_conn;
1159 else
1160 goto discard;
1161 }
1162
1163 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 1164 cxgbi_skcb_flags(skb) = 0;
1165
7b36b6e0 1166 skb_reset_transport_header(skb);
1167 __skb_pull(skb, sizeof(*cpl));
1168 __pskb_trim(skb, ntohs(cpl->len));
1169
1170 if (!csk->skb_ulp_lhdr) {
1171 unsigned char *bhs;
3bd3e8bf 1172 unsigned int hlen, dlen, plen;
7b36b6e0 1173
1174 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1175 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1176 csk, csk->state, csk->flags, csk->tid, skb);
1177 csk->skb_ulp_lhdr = skb;
e27d6169 1178 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 1179
e27d6169 1180 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 1181 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 1182 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 1183 csk->rcv_nxt);
1184 goto abort_conn;
1185 }
1186
e27d6169 1187 bhs = skb->data;
7b36b6e0 1188 hlen = ntohs(cpl->len);
1189 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1190
bdc590b9 1191 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
3bd3e8bf
KX		 1192 if (is_t4(lldi->adapter_type))
1193 plen -= 40;
1194
1195 if ((hlen + dlen) != plen) {
7b36b6e0 1196 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1197 "mismatch %u != %u + %u, seq 0x%x.\n",
3bd3e8bf
KX		 1198 csk->tid, plen, hlen, dlen,
1199 cxgbi_skcb_tcp_seq(skb));
7b36b6e0 1200 goto abort_conn;
1201 }
1202
1203 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1204 if (dlen)
1205 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1206 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1207
1208 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1209 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1210 csk, skb, *bhs, hlen, dlen,
1211 ntohl(*((unsigned int *)(bhs + 16))),
1212 ntohl(*((unsigned int *)(bhs + 24))));
1213
1214 } else {
e27d6169 1215 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 1216
e27d6169 1217 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 1218 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1219 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1220 csk, csk->state, csk->flags, skb, lskb);
1221 }
1222
1223 __skb_queue_tail(&csk->receive_queue, skb);
1224 spin_unlock_bh(&csk->lock);
1225 return;
1226
1227abort_conn:
1228 send_abort_req(csk);
1229discard:
1230 spin_unlock_bh(&csk->lock);
1231rel_skb:
1232 __kfree_skb(skb);
1233}
1234
44830d8f
VP		 1235static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1236{
1237 struct cxgbi_sock *csk;
1238 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1239 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1240 struct tid_info *t = lldi->tids;
1241 struct sk_buff *lskb;
1242 u32 tid = GET_TID(cpl);
1243 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1244
1245 csk = lookup_tid(t, tid);
1246 if (unlikely(!csk)) {
1247 pr_err("can't find conn. for tid %u.\n", tid);
1248 goto rel_skb;
1249 }
1250
1251 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1252 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1253 csk, csk->state, csk->flags, csk->tid, skb,
1254 skb->len, pdu_len_ddp);
1255
1256 spin_lock_bh(&csk->lock);
1257
1258 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1259 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1260 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1261 csk, csk->state, csk->flags, csk->tid);
1262
1263 if (csk->state != CTP_ABORTING)
1264 goto abort_conn;
1265 else
1266 goto discard;
1267 }
1268
1269 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1270 cxgbi_skcb_flags(skb) = 0;
1271
1272 skb_reset_transport_header(skb);
1273 __skb_pull(skb, sizeof(*cpl));
1274 __pskb_trim(skb, ntohs(cpl->len));
1275
1276 if (!csk->skb_ulp_lhdr)
1277 csk->skb_ulp_lhdr = skb;
1278
1279 lskb = csk->skb_ulp_lhdr;
1280 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1281
1282 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1283 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1284 csk, csk->state, csk->flags, skb, lskb);
1285
1286 __skb_queue_tail(&csk->receive_queue, skb);
1287 spin_unlock_bh(&csk->lock);
1288 return;
1289
1290abort_conn:
1291 send_abort_req(csk);
1292discard:
1293 spin_unlock_bh(&csk->lock);
1294rel_skb:
1295 __kfree_skb(skb);
1296}
1297
1298static void
1299cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1300 struct sk_buff *skb, u32 ddpvld)
1301{
1302 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1303 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1304 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1305 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1306 }
1307
1308 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1309 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1310 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1311 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1312 }
1313
1314 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1315 log_debug(1 << CXGBI_DBG_PDU_RX,
1316 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1317 csk, skb, ddpvld);
1318 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1319 }
1320
1321 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1322 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1323 log_debug(1 << CXGBI_DBG_PDU_RX,
1324 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1325 csk, skb, ddpvld);
1326 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1327 }
1328}
1329
7b36b6e0 1330static void do_rx_data_ddp(struct cxgbi_device *cdev,
1331 struct sk_buff *skb)
1332{
1333 struct cxgbi_sock *csk;
1334 struct sk_buff *lskb;
1335 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1336 unsigned int tid = GET_TID(rpl);
1337 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1338 struct tid_info *t = lldi->tids;
44830d8f 1339 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
7b36b6e0 1340
1341 csk = lookup_tid(t, tid);
1342 if (unlikely(!csk)) {
1343 pr_err("can't find connection for tid %u.\n", tid);
1344 goto rel_skb;
1345 }
1346
1347 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1348 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
44830d8f 1349 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
7b36b6e0 1350
1351 spin_lock_bh(&csk->lock);
1352
1353 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1354 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1355 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1356 csk, csk->state, csk->flags, csk->tid);
1357 if (csk->state != CTP_ABORTING)
1358 goto abort_conn;
1359 else
1360 goto discard;
1361 }
1362
1363 if (!csk->skb_ulp_lhdr) {
1364 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1365 goto abort_conn;
1366 }
1367
1368 lskb = csk->skb_ulp_lhdr;
1369 csk->skb_ulp_lhdr = NULL;
1370
7b36b6e0 1371 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1372
1373 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1374 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1375 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1376
44830d8f
VP		 1377 cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1378
7b36b6e0 1379 log_debug(1 << CXGBI_DBG_PDU_RX,
1380 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1381 csk, lskb, cxgbi_skcb_flags(lskb));
1382
e27d6169 1383 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1384 cxgbi_conn_pdu_ready(csk);
1385 spin_unlock_bh(&csk->lock);
1386 goto rel_skb;
1387
1388abort_conn:
1389 send_abort_req(csk);
1390discard:
1391 spin_unlock_bh(&csk->lock);
1392rel_skb:
1393 __kfree_skb(skb);
1394}
1395
44830d8f
VP		 1396static void
1397do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1398{
1399 struct cxgbi_sock *csk;
1400 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1401 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1402 struct tid_info *t = lldi->tids;
1403 struct sk_buff *data_skb = NULL;
1404 u32 tid = GET_TID(rpl);
1405 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1406 u32 seq = be32_to_cpu(rpl->seq);
1407 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1408
1409 csk = lookup_tid(t, tid);
1410 if (unlikely(!csk)) {
1411 pr_err("can't find connection for tid %u.\n", tid);
1412 goto rel_skb;
1413 }
1414
1415 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1416 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1417 "pdu_len_ddp %u, status %u.\n",
1418 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1419 ntohs(rpl->len), pdu_len_ddp, rpl->status);
1420
1421 spin_lock_bh(&csk->lock);
1422
1423 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1424 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1425 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1426 csk, csk->state, csk->flags, csk->tid);
1427
1428 if (csk->state != CTP_ABORTING)
1429 goto abort_conn;
1430 else
1431 goto discard;
1432 }
1433
1434 cxgbi_skcb_tcp_seq(skb) = seq;
1435 cxgbi_skcb_flags(skb) = 0;
1436 cxgbi_skcb_rx_pdulen(skb) = 0;
1437
1438 skb_reset_transport_header(skb);
1439 __skb_pull(skb, sizeof(*rpl));
1440 __pskb_trim(skb, be16_to_cpu(rpl->len));
1441
1442 csk->rcv_nxt = seq + pdu_len_ddp;
1443
1444 if (csk->skb_ulp_lhdr) {
1445 data_skb = skb_peek(&csk->receive_queue);
1446 if (!data_skb ||
1447 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1448 pr_err("Error! freelist data not found 0x%p, tid %u\n",
1449 data_skb, tid);
1450
1451 goto abort_conn;
1452 }
1453 __skb_unlink(data_skb, &csk->receive_queue);
1454
1455 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1456
1457 __skb_queue_tail(&csk->receive_queue, skb);
1458 __skb_queue_tail(&csk->receive_queue, data_skb);
1459 } else {
1460 __skb_queue_tail(&csk->receive_queue, skb);
1461 }
1462
1463 csk->skb_ulp_lhdr = NULL;
1464
1465 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1466 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1467 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1468 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1469
1470 cxgb4i_process_ddpvld(csk, skb, ddpvld);
1471
1472 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1473 csk, skb, cxgbi_skcb_flags(skb));
1474
1475 cxgbi_conn_pdu_ready(csk);
1476 spin_unlock_bh(&csk->lock);
1477
1478 return;
1479
1480abort_conn:
1481 send_abort_req(csk);
1482discard:
1483 spin_unlock_bh(&csk->lock);
1484rel_skb:
1485 __kfree_skb(skb);
1486}
1487
7b36b6e0 1488static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1489{
1490 struct cxgbi_sock *csk;
1491 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1492 unsigned int tid = GET_TID(rpl);
1493 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1494 struct tid_info *t = lldi->tids;
1495
1496 csk = lookup_tid(t, tid);
1497 if (unlikely(!csk))
1498 pr_err("can't find connection for tid %u.\n", tid);
1499 else {
1500 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1501 "csk 0x%p,%u,0x%lx,%u.\n",
1502 csk, csk->state, csk->flags, csk->tid);
1503 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1504 rpl->seq_vld);
1505 }
1506 __kfree_skb(skb);
1507}
1508
1509static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1510{
1511 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1512 unsigned int tid = GET_TID(rpl);
1513 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1514 struct tid_info *t = lldi->tids;
1515 struct cxgbi_sock *csk;
1516
1517 csk = lookup_tid(t, tid);
1518 if (!csk)
1519 pr_err("can't find conn. for tid %u.\n", tid);
1520
1521 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1522 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1523 csk, csk->state, csk->flags, csk->tid, rpl->status);
1524
1525 if (rpl->status != CPL_ERR_NONE)
1526 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1527 csk, tid, rpl->status);
1528
1529 __kfree_skb(skb);
1530}
1531
1532static int alloc_cpls(struct cxgbi_sock *csk)
1533{
24d3f95a 1534 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1535 0, GFP_KERNEL);
7b36b6e0 1536 if (!csk->cpl_close)
1537 return -ENOMEM;
1538
24d3f95a 1539 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1540 0, GFP_KERNEL);
7b36b6e0 1541 if (!csk->cpl_abort_req)
1542 goto free_cpls;
1543
24d3f95a 1544 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1545 0, GFP_KERNEL);
7b36b6e0 1546 if (!csk->cpl_abort_rpl)
1547 goto free_cpls;
1548 return 0;
1549
1550free_cpls:
1551 cxgbi_sock_free_cpl_skbs(csk);
1552 return -ENOMEM;
1553}
1554
1555static inline void l2t_put(struct cxgbi_sock *csk)
1556{
1557 if (csk->l2t) {
1558 cxgb4_l2t_release(csk->l2t);
1559 csk->l2t = NULL;
1560 cxgbi_sock_put(csk);
1561 }
1562}
1563
1564static void release_offload_resources(struct cxgbi_sock *csk)
1565{
1566 struct cxgb4_lld_info *lldi;
211a84e3
AB		 1567#if IS_ENABLED(CONFIG_IPV6)
1568 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1569#endif
7b36b6e0 1570
1571 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1572 "csk 0x%p,%u,0x%lx,%u.\n",
1573 csk, csk->state, csk->flags, csk->tid);
1574
1575 cxgbi_sock_free_cpl_skbs(csk);
1576 if (csk->wr_cred != csk->wr_max_cred) {
1577 cxgbi_sock_purge_wr_queue(csk);
1578 cxgbi_sock_reset_wr_list(csk);
1579 }
1580
1581 l2t_put(csk);
211a84e3
AB		 1582#if IS_ENABLED(CONFIG_IPV6)
1583 if (csk->csk_family == AF_INET6)
1584 cxgb4_clip_release(ndev,
1585 (const u32 *)&csk->saddr6.sin6_addr, 1);
1586#endif
1587
7b36b6e0 1588 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1589 free_atid(csk);
1590 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1591 lldi = cxgbi_cdev_priv(csk->cdev);
1592 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1593 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1594 cxgbi_sock_put(csk);
1595 }
1596 csk->dst = NULL;
1597 csk->cdev = NULL;
1598}
1599
1600static int init_act_open(struct cxgbi_sock *csk)
1601{
1602 struct cxgbi_device *cdev = csk->cdev;
1603 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1604 struct net_device *ndev = cdev->ports[csk->port_id];
7b36b6e0 1605 struct sk_buff *skb = NULL;
759a0cc5
AB		 1606 struct neighbour *n = NULL;
1607 void *daddr;
7b36b6e0 1608 unsigned int step;
759a0cc5 1609 unsigned int size, size6;
81daf10c
KX		 1610 unsigned int linkspeed;
1611 unsigned int rcv_winf, snd_winf;
7b36b6e0 1612
1613 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1614 "csk 0x%p,%u,0x%lx,%u.\n",
1615 csk, csk->state, csk->flags, csk->tid);
1616
759a0cc5
AB		 1617 if (csk->csk_family == AF_INET)
1618 daddr = &csk->daddr.sin_addr.s_addr;
e81fbf6c
AB		 1619#if IS_ENABLED(CONFIG_IPV6)
1620 else if (csk->csk_family == AF_INET6)
759a0cc5 1621 daddr = &csk->daddr6.sin6_addr;
e81fbf6c
AB		 1622#endif
1623 else {
1624 pr_err("address family 0x%x not supported\n", csk->csk_family);
1625 goto rel_resource;
1626 }
759a0cc5
AB		 1627
1628 n = dst_neigh_lookup(csk->dst, daddr);
1629
1630 if (!n) {
1631 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1632 goto rel_resource;
1633 }
1634
7b36b6e0 1635 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1636 if (csk->atid < 0) {
1637 pr_err("%s, NO atid available.\n", ndev->name);
338be072 1638 goto rel_resource_without_clip;
7b36b6e0 1639 }
1640 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1641 cxgbi_sock_get(csk);
1642
51e059bd 1643 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
7b36b6e0 1644 if (!csk->l2t) {
1645 pr_err("%s, cannot alloc l2t.\n", ndev->name);
211a84e3 1646 goto rel_resource_without_clip;
7b36b6e0 1647 }
1648 cxgbi_sock_get(csk);
1649
211a84e3
AB		 1650#if IS_ENABLED(CONFIG_IPV6)
1651 if (csk->csk_family == AF_INET6)
1652 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1653#endif
1654
586be7cb 1655 if (is_t4(lldi->adapter_type)) {
759a0cc5
AB		 1656 size = sizeof(struct cpl_act_open_req);
1657 size6 = sizeof(struct cpl_act_open_req6);
586be7cb 1658 } else if (is_t5(lldi->adapter_type)) {
759a0cc5
AB		 1659 size = sizeof(struct cpl_t5_act_open_req);
1660 size6 = sizeof(struct cpl_t5_act_open_req6);
586be7cb
VP		 1661 } else {
1662 size = sizeof(struct cpl_t6_act_open_req);
1663 size6 = sizeof(struct cpl_t6_act_open_req6);
759a0cc5
AB		 1664 }
1665
1666 if (csk->csk_family == AF_INET)
1667 skb = alloc_wr(size, 0, GFP_NOIO);
f42bb57c 1668#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1669 else
1670 skb = alloc_wr(size6, 0, GFP_NOIO);
f42bb57c 1671#endif
759a0cc5 1672
7b36b6e0 1673 if (!skb)
1674 goto rel_resource;
1675 skb->sk = (struct sock *)csk;
1676 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1677
1678 if (!csk->mtu)
1679 csk->mtu = dst_mtu(csk->dst);
1680 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1681 csk->tx_chan = cxgb4_port_chan(ndev);
e0eed8ab
VP		 1682 csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type,
1683 cxgb4_port_viid(ndev));
7b36b6e0 1684 step = lldi->ntxq / lldi->nchan;
1685 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1686 step = lldi->nrxq / lldi->nchan;
1687 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
81daf10c
KX		 1688 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1689 csk->snd_win = cxgb4i_snd_win;
1690 csk->rcv_win = cxgb4i_rcv_win;
1691 if (cxgb4i_rcv_win <= 0) {
1692 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1693 rcv_winf = linkspeed / SPEED_10000;
1694 if (rcv_winf)
1695 csk->rcv_win *= rcv_winf;
1696 }
1697 if (cxgb4i_snd_win <= 0) {
1698 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1699 snd_winf = linkspeed / SPEED_10000;
1700 if (snd_winf)
1701 csk->snd_win *= snd_winf;
1702 }
759a0cc5
AB		 1703 csk->wr_cred = lldi->wr_cred -
1704 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1705 csk->wr_max_cred = csk->wr_cred;
7b36b6e0 1706 csk->wr_una_cred = 0;
1707 cxgbi_sock_reset_wr_list(csk);
1708 csk->err = 0;
7b36b6e0 1709
759a0cc5
AB		 1710 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1711 (&csk->saddr), (&csk->daddr), csk, csk->state,
1712 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1713 csk->mtu, csk->mss_idx, csk->smac_idx);
1714
1715 /* must wait for either a act_open_rpl or act_open_establish */
1fe1fdb0
VP		 1716 if (!try_module_get(cdev->owner)) {
1717 pr_err("%s, try_module_get failed.\n", ndev->name);
1718 goto rel_resource;
1719 }
1720
7b36b6e0 1721 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
759a0cc5
AB		 1722 if (csk->csk_family == AF_INET)
1723 send_act_open_req(csk, skb, csk->l2t);
f42bb57c 1724#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1725 else
1726 send_act_open_req6(csk, skb, csk->l2t);
f42bb57c 1727#endif
c4737377 1728 neigh_release(n);
759a0cc5 1729
7b36b6e0 1730 return 0;
1731
1732rel_resource:
211a84e3
AB		 1733#if IS_ENABLED(CONFIG_IPV6)
1734 if (csk->csk_family == AF_INET6)
1735 cxgb4_clip_release(ndev,
1736 (const u32 *)&csk->saddr6.sin6_addr, 1);
1737#endif
1738rel_resource_without_clip:
c4737377
DM		 1739 if (n)
1740 neigh_release(n);
7b36b6e0 1741 if (skb)
1742 __kfree_skb(skb);
1743 return -EINVAL;
1744}
1745
4665bdd5 1746static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
7b36b6e0 1747 [CPL_ACT_ESTABLISH] = do_act_establish,
1748 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1749 [CPL_PEER_CLOSE] = do_peer_close,
1750 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1751 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1752 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1753 [CPL_FW4_ACK] = do_fw4_ack,
1754 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
44830d8f 1755 [CPL_ISCSI_DATA] = do_rx_iscsi_data,
7b36b6e0 1756 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1757 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
3bd3e8bf 1758 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
44830d8f 1759 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
f7bcd2e1 1760 [CPL_RX_DATA] = do_rx_data,
7b36b6e0 1761};
1762
4665bdd5 1763static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
7b36b6e0 1764{
1765 int rc;
1766
1767 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1768 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1769
1770 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1771 cxgb4i_max_connect);
1772 if (rc < 0)
1773 return rc;
1774
1775 cdev->csk_release_offload_resources = release_offload_resources;
1776 cdev->csk_push_tx_frames = push_tx_frames;
1777 cdev->csk_send_abort_req = send_abort_req;
1778 cdev->csk_send_close_req = send_close_req;
1779 cdev->csk_send_rx_credits = send_rx_credits;
1780 cdev->csk_alloc_cpls = alloc_cpls;
1781 cdev->csk_init_act_open = init_act_open;
1782
1783 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1784 return 0;
1785}
1786
71f7a00b
VP		 1787static inline void
1788ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1789 struct ulp_mem_io *req,
1790 unsigned int wr_len, unsigned int dlen,
1791 unsigned int pm_addr,
1792 int tid)
1793{
1794 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1795 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1796
1797 INIT_ULPTX_WR(req, wr_len, 0, tid);
1798 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1799 FW_WR_ATOMIC_V(0));
1800 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1801 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1802 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1803 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1804 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1805 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1806
1807 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1808 idata->len = htonl(dlen);
1809}
1810
1811static struct sk_buff *
1812ddp_ppod_init_idata(struct cxgbi_device *cdev,
1813 struct cxgbi_ppm *ppm,
1814 unsigned int idx, unsigned int npods,
1815 unsigned int tid)
1816{
1817 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1818 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1819 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1820 sizeof(struct ulptx_idata) + dlen, 16);
1821 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1822
1823 if (!skb) {
1824 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1825 __func__, ppm->ndev->name, idx, npods);
1826 return NULL;
1827 }
1828
1829 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1830 pm_addr, tid);
1831
1832 return skb;
1833}
1834
1835static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1836 struct cxgbi_task_tag_info *ttinfo,
1837 unsigned int idx, unsigned int npods,
1838 struct scatterlist **sg_pp,
1839 unsigned int *sg_off)
1840{
1841 struct cxgbi_device *cdev = csk->cdev;
1842 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1843 csk->tid);
1844 struct ulp_mem_io *req;
1845 struct ulptx_idata *idata;
1846 struct cxgbi_pagepod *ppod;
1847 int i;
1848
1849 if (!skb)
1850 return -ENOMEM;
1851
1852 req = (struct ulp_mem_io *)skb->head;
1853 idata = (struct ulptx_idata *)(req + 1);
1854 ppod = (struct cxgbi_pagepod *)(idata + 1);
1855
1856 for (i = 0; i < npods; i++, ppod++)
1857 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1858
1859 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1860 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1861 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1862
1863 spin_lock_bh(&csk->lock);
1864 cxgbi_sock_skb_entail(csk, skb);
1865 spin_unlock_bh(&csk->lock);
1866
1867 return 0;
1868}
1869
1870static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1871 struct cxgbi_task_tag_info *ttinfo)
1872{
1873 unsigned int pidx = ttinfo->idx;
1874 unsigned int npods = ttinfo->npods;
1875 unsigned int i, cnt;
1876 int err = 0;
1877 struct scatterlist *sg = ttinfo->sgl;
1878 unsigned int offset = 0;
1879
1880 ttinfo->cid = csk->port_id;
1881
1882 for (i = 0; i < npods; i += cnt, pidx += cnt) {
1883 cnt = npods - i;
1884
1885 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1886 cnt = ULPMEM_IDATA_MAX_NPPODS;
1887 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1888 &sg, &offset);
1889 if (err < 0)
1890 break;
1891 }
1892
1893 return err;
1894}
1895
7b36b6e0 1896static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1897 int pg_idx, bool reply)
1898{
1899 struct sk_buff *skb;
1900 struct cpl_set_tcb_field *req;
7b36b6e0 1901
e27d6169 1902 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1903 return 0;
1904
24d3f95a 1905 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1906 if (!skb)
1907 return -ENOMEM;
1908
e27d6169 1909 /* set up ulp page size */
7b36b6e0 1910 req = (struct cpl_set_tcb_field *)skb->head;
1911 INIT_TP_WR(req, csk->tid);
1912 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
bdc590b9 1913 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
e27d6169 1914 req->word_cookie = htons(0);
1915 req->mask = cpu_to_be64(0x3 << 8);
1916 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1917 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1918
1919 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1920 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1921
1922 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1923 return 0;
1924}
1925
1926static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1927 int hcrc, int dcrc, int reply)
1928{
1929 struct sk_buff *skb;
1930 struct cpl_set_tcb_field *req;
7b36b6e0 1931
e27d6169 1932 if (!hcrc && !dcrc)
1933 return 0;
7b36b6e0 1934
24d3f95a 1935 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1936 if (!skb)
1937 return -ENOMEM;
1938
1939 csk->hcrc_len = (hcrc ? 4 : 0);
1940 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1941 /* set up ulp submode */
7b36b6e0 1942 req = (struct cpl_set_tcb_field *)skb->head;
1943 INIT_TP_WR(req, tid);
1944 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
bdc590b9 1945 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
e27d6169 1946 req->word_cookie = htons(0);
1947 req->mask = cpu_to_be64(0x3 << 4);
1948 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1949 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1950 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1951
1952 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1953 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1954
1955 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1956 return 0;
1957}
1958
71f7a00b
VP		 1959static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
1960{
1961 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
1962 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
1963}
1964
7b36b6e0 1965static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1966{
71f7a00b
VP		 1967 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1968 struct net_device *ndev = cdev->ports[0];
1969 struct cxgbi_tag_format tformat;
1970 unsigned int ppmax;
1971 int i;
1972
1973 if (!lldi->vr->iscsi.size) {
1974 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
1975 return -EACCES;
1976 }
1977
1978 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
1979 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
1980
1981 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
1982 for (i = 0; i < 4; i++)
1983 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
1984 & 0xF;
1985 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
1986
1987 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
1988 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
1989
7b36b6e0 1990 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1991 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
71f7a00b
VP		 1992 cdev->csk_ddp_set_map = ddp_set_map;
1993 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1994 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1995 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1996 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1997 cdev->cdev2ppm = cdev2ppm;
1998
7b36b6e0 1999 return 0;
2000}
2001
2002static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2003{
2004 struct cxgbi_device *cdev;
2005 struct port_info *pi;
2006 int i, rc;
2007
2008 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2009 if (!cdev) {
2010 pr_info("t4 device 0x%p, register failed.\n", lldi);
2011 return NULL;
2012 }
2013 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2014 cdev, lldi->adapter_type, lldi->nports,
2015 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2016 lldi->nrxq, lldi->wr_cred);
2017 for (i = 0; i < lldi->nrxq; i++)
2018 log_debug(1 << CXGBI_DBG_DEV,
2019 "t4 0x%p, rxq id #%d: %u.\n",
2020 cdev, i, lldi->rxq_ids[i]);
2021
2022 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2023 cdev->flags = CXGBI_FLAG_DEV_T4;
2024 cdev->pdev = lldi->pdev;
2025 cdev->ports = lldi->ports;
2026 cdev->nports = lldi->nports;
2027 cdev->mtus = lldi->mtus;
2028 cdev->nmtus = NMTUS;
586be7cb
VP		 2029 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2030 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
7b36b6e0 2031 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2032 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2033 cdev->itp = &cxgb4i_iscsi_transport;
1fe1fdb0 2034 cdev->owner = THIS_MODULE;
7b36b6e0 2035
d7990b0c
AB		 2036 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
2037 << FW_VIID_PFN_S;
e27d6169 2038 pr_info("cdev 0x%p,%s, pfvf %u.\n",
2039 cdev, lldi->ports[0]->name, cdev->pfvf);
2040
7b36b6e0 2041 rc = cxgb4i_ddp_init(cdev);
2042 if (rc) {
2043 pr_info("t4 0x%p ddp init failed.\n", cdev);
2044 goto err_out;
2045 }
2046 rc = cxgb4i_ofld_init(cdev);
2047 if (rc) {
2048 pr_info("t4 0x%p ofld init failed.\n", cdev);
2049 goto err_out;
2050 }
2051
2052 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
2053 &cxgb4i_host_template, cxgb4i_stt);
2054 if (rc)
2055 goto err_out;
2056
2057 for (i = 0; i < cdev->nports; i++) {
2058 pi = netdev_priv(lldi->ports[i]);
2059 cdev->hbas[i]->port_id = pi->port_id;
2060 }
2061 return cdev;
2062
2063err_out:
2064 cxgbi_device_unregister(cdev);
2065 return ERR_PTR(-ENOMEM);
2066}
2067
2068#define RX_PULL_LEN 128
2069static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2070 const struct pkt_gl *pgl)
2071{
2072 const struct cpl_act_establish *rpl;
2073 struct sk_buff *skb;
2074 unsigned int opc;
2075 struct cxgbi_device *cdev = handle;
2076
2077 if (pgl == NULL) {
2078 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2079
24d3f95a 2080 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 2081 if (!skb)
2082 goto nomem;
2083 skb_copy_to_linear_data(skb, &rsp[1], len);
2084 } else {
2085 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2086 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2087 pgl->va, be64_to_cpu(*rsp),
2088 be64_to_cpu(*(u64 *)pgl->va),
2089 pgl->tot_len);
2090 return 0;
2091 }
2092 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2093 if (unlikely(!skb))
2094 goto nomem;
2095 }
2096
2097 rpl = (struct cpl_act_establish *)skb->data;
2098 opc = rpl->ot.opcode;
2099 log_debug(1 << CXGBI_DBG_TOE,
2100 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2101 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2102 if (cxgb4i_cplhandlers[opc])
2103 cxgb4i_cplhandlers[opc](cdev, skb);
2104 else {
2105 pr_err("No handler for opcode 0x%x.\n", opc);
2106 __kfree_skb(skb);
2107 }
2108 return 0;
2109nomem:
2110 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2111 return 1;
2112}
2113
2114static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2115{
2116 struct cxgbi_device *cdev = handle;
2117
2118 switch (state) {
2119 case CXGB4_STATE_UP:
2120 pr_info("cdev 0x%p, UP.\n", cdev);
7b36b6e0 2121 break;
2122 case CXGB4_STATE_START_RECOVERY:
2123 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2124 /* close all connections */
2125 break;
2126 case CXGB4_STATE_DOWN:
2127 pr_info("cdev 0x%p, DOWN.\n", cdev);
2128 break;
2129 case CXGB4_STATE_DETACH:
2130 pr_info("cdev 0x%p, DETACH.\n", cdev);
c3b331a3 2131 cxgbi_device_unregister(cdev);
7b36b6e0 2132 break;
2133 default:
2134 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2135 break;
2136 }
2137 return 0;
2138}
2139
2140static int __init cxgb4i_init_module(void)
2141{
2142 int rc;
2143
2144 printk(KERN_INFO "%s", version);
2145
2146 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2147 if (rc < 0)
2148 return rc;
2149 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
759a0cc5 2150
7b36b6e0 2151 return 0;
2152}
2153
2154static void __exit cxgb4i_exit_module(void)
2155{
2156 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2157 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2158 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2159}
2160
2161module_init(cxgb4i_init_module);
2162module_exit(cxgb4i_exit_module);
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