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bridge: Add ability to enable TSO
[deliverable/linux.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
CommitLineData
7b36b6e0 1/*
2 * cxgb4i.c: Chelsio T4 iSCSI driver.
3 *
4 * Copyright (c) 2010 Chelsio Communications, Inc.
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
7b36b6e0 16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <scsi/scsi_host.h>
19#include <net/tcp.h>
20#include <net/dst.h>
21#include <linux/netdevice.h>
759a0cc5 22#include <net/addrconf.h>
7b36b6e0 23
3bd3e8bf 24#include "t4_regs.h"
7b36b6e0 25#include "t4_msg.h"
26#include "cxgb4.h"
27#include "cxgb4_uld.h"
28#include "t4fw_api.h"
29#include "l2t.h"
30#include "cxgb4i.h"
31
32static unsigned int dbg_level;
33
34#include "../libcxgbi.h"
35
36#define DRV_MODULE_NAME "cxgb4i"
3bd3e8bf
KX		 37#define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
38#define DRV_MODULE_VERSION "0.9.4"
7b36b6e0 39
40static char version[] =
41 DRV_MODULE_DESC " " DRV_MODULE_NAME
3bd3e8bf 42 " v" DRV_MODULE_VERSION "\n";
7b36b6e0 43
44MODULE_AUTHOR("Chelsio Communications, Inc.");
45MODULE_DESCRIPTION(DRV_MODULE_DESC);
46MODULE_VERSION(DRV_MODULE_VERSION);
47MODULE_LICENSE("GPL");
48
49module_param(dbg_level, uint, 0644);
50MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
51
52static int cxgb4i_rcv_win = 256 * 1024;
53module_param(cxgb4i_rcv_win, int, 0644);
54MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
55
56static int cxgb4i_snd_win = 128 * 1024;
57module_param(cxgb4i_snd_win, int, 0644);
58MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
59
60static int cxgb4i_rx_credit_thres = 10 * 1024;
61module_param(cxgb4i_rx_credit_thres, int, 0644);
62MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
63 "RX credits return threshold in bytes (default=10KB)");
64
65static unsigned int cxgb4i_max_connect = (8 * 1024);
66module_param(cxgb4i_max_connect, uint, 0644);
67MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
68
69static unsigned short cxgb4i_sport_base = 20000;
70module_param(cxgb4i_sport_base, ushort, 0644);
71MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
72
73typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
74
75static void *t4_uld_add(const struct cxgb4_lld_info *);
76static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
77static int t4_uld_state_change(void *, enum cxgb4_state state);
64bfead8 78static inline int send_tx_flowc_wr(struct cxgbi_sock *);
7b36b6e0 79
80static const struct cxgb4_uld_info cxgb4i_uld_info = {
81 .name = DRV_MODULE_NAME,
82 .add = t4_uld_add,
83 .rx_handler = t4_uld_rx_handler,
84 .state_change = t4_uld_state_change,
85};
86
87static struct scsi_host_template cxgb4i_host_template = {
88 .module = THIS_MODULE,
89 .name = DRV_MODULE_NAME,
90 .proc_name = DRV_MODULE_NAME,
91 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
92 .queuecommand = iscsi_queuecommand,
db5ed4df 93 .change_queue_depth = scsi_change_queue_depth,
7b36b6e0 94 .sg_tablesize = SG_ALL,
95 .max_sectors = 0xFFFF,
96 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
97 .eh_abort_handler = iscsi_eh_abort,
98 .eh_device_reset_handler = iscsi_eh_device_reset,
99 .eh_target_reset_handler = iscsi_eh_recover_target,
100 .target_alloc = iscsi_target_alloc,
101 .use_clustering = DISABLE_CLUSTERING,
102 .this_id = -1,
c40ecc12 103 .track_queue_depth = 1,
7b36b6e0 104};
105
106static struct iscsi_transport cxgb4i_iscsi_transport = {
107 .owner = THIS_MODULE,
108 .name = DRV_MODULE_NAME,
109 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
110 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
fdafd4df 111 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
3128c6c7 112 .attr_is_visible = cxgbi_attr_is_visible,
7b36b6e0 113 .get_host_param = cxgbi_get_host_param,
114 .set_host_param = cxgbi_set_host_param,
115 /* session management */
116 .create_session = cxgbi_create_session,
117 .destroy_session = cxgbi_destroy_session,
118 .get_session_param = iscsi_session_get_param,
119 /* connection management */
120 .create_conn = cxgbi_create_conn,
121 .bind_conn = cxgbi_bind_conn,
122 .destroy_conn = iscsi_tcp_conn_teardown,
123 .start_conn = iscsi_conn_start,
124 .stop_conn = iscsi_conn_stop,
c71b9b66 125 .get_conn_param = iscsi_conn_get_param,
7b36b6e0 126 .set_param = cxgbi_set_conn_param,
127 .get_stats = cxgbi_get_conn_stats,
128 /* pdu xmit req from user space */
129 .send_pdu = iscsi_conn_send_pdu,
130 /* task */
131 .init_task = iscsi_tcp_task_init,
132 .xmit_task = iscsi_tcp_task_xmit,
133 .cleanup_task = cxgbi_cleanup_task,
134 /* pdu */
135 .alloc_pdu = cxgbi_conn_alloc_pdu,
136 .init_pdu = cxgbi_conn_init_pdu,
137 .xmit_pdu = cxgbi_conn_xmit_pdu,
138 .parse_pdu_itt = cxgbi_parse_pdu_itt,
139 /* TCP connect/disconnect */
c71b9b66 140 .get_ep_param = cxgbi_get_ep_param,
7b36b6e0 141 .ep_connect = cxgbi_ep_connect,
142 .ep_poll = cxgbi_ep_poll,
143 .ep_disconnect = cxgbi_ep_disconnect,
144 /* Error recovery timeout call */
145 .session_recovery_timedout = iscsi_session_recovery_timedout,
146};
147
148static struct scsi_transport_template *cxgb4i_stt;
149
150/*
151 * CPL (Chelsio Protocol Language) defines a message passing interface between
152 * the host driver and Chelsio asic.
153 * The section below implments CPLs that related to iscsi tcp connection
154 * open/close/abort and data send/receive.
155 */
759a0cc5 156
7b36b6e0 157#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
158#define RCV_BUFSIZ_MASK 0x3FFU
159#define MAX_IMM_TX_PKT_LEN 128
160
7b36b6e0 161static int push_tx_frames(struct cxgbi_sock *, int);
162
163/*
164 * is_ofld_imm - check whether a packet can be sent as immediate data
165 * @skb: the packet
166 *
167 * Returns true if a packet can be sent as an offload WR with immediate
168 * data. We currently use the same limit as for Ethernet packets.
169 */
84944d8c 170static inline bool is_ofld_imm(const struct sk_buff *skb)
7b36b6e0 171{
84944d8c
KX		 172 int len = skb->len;
173
174 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
175 len += sizeof(struct fw_ofld_tx_data_wr);
176
177 return len <= MAX_IMM_TX_PKT_LEN;
7b36b6e0 178}
179
180static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
181 struct l2t_entry *e)
182{
3bd3e8bf 183 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
759a0cc5 184 int t4 = is_t4(lldi->adapter_type);
7b36b6e0 185 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
186 unsigned long long opt0;
187 unsigned int opt2;
188 unsigned int qid_atid = ((unsigned int)csk->atid) |
189 (((unsigned int)csk->rss_qid) << 14);
190
d7990b0c
AB		 191 opt0 = KEEP_ALIVE_F |
192 WND_SCALE_V(wscale) |
193 MSS_IDX_V(csk->mss_idx) |
194 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
195 TX_CHAN_V(csk->tx_chan) |
196 SMAC_SEL_V(csk->smac_idx) |
197 ULP_MODE_V(ULP_MODE_ISCSI) |
198 RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10);
199 opt2 = RX_CHANNEL_V(0) |
200 RSS_QUEUE_VALID_F |
201 (RX_FC_DISABLE_F) |
202 RSS_QUEUE_V(csk->rss_qid);
7b36b6e0 203
3bd3e8bf
KX		 204 if (is_t4(lldi->adapter_type)) {
205 struct cpl_act_open_req *req =
206 (struct cpl_act_open_req *)skb->head;
207
3bd3e8bf
KX		 208 INIT_TP_WR(req, 0);
209 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
7b36b6e0 210 qid_atid));
3bd3e8bf
KX		 211 req->local_port = csk->saddr.sin_port;
212 req->peer_port = csk->daddr.sin_port;
213 req->local_ip = csk->saddr.sin_addr.s_addr;
214 req->peer_ip = csk->daddr.sin_addr.s_addr;
215 req->opt0 = cpu_to_be64(opt0);
ac0245ff
KX		 216 req->params = cpu_to_be32(cxgb4_select_ntuple(
217 csk->cdev->ports[csk->port_id],
218 csk->l2t));
d7990b0c 219 opt2 |= RX_FC_VALID_F;
3bd3e8bf 220 req->opt2 = cpu_to_be32(opt2);
7b36b6e0 221
3bd3e8bf
KX		 222 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
223 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
224 csk, &req->local_ip, ntohs(req->local_port),
225 &req->peer_ip, ntohs(req->peer_port),
226 csk->atid, csk->rss_qid);
227 } else {
228 struct cpl_t5_act_open_req *req =
229 (struct cpl_t5_act_open_req *)skb->head;
230
3bd3e8bf
KX		 231 INIT_TP_WR(req, 0);
232 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
233 qid_atid));
234 req->local_port = csk->saddr.sin_port;
235 req->peer_port = csk->daddr.sin_port;
236 req->local_ip = csk->saddr.sin_addr.s_addr;
237 req->peer_ip = csk->daddr.sin_addr.s_addr;
238 req->opt0 = cpu_to_be64(opt0);
d7990b0c 239 req->params = cpu_to_be64(FILTER_TUPLE_V(
ac0245ff
KX		 240 cxgb4_select_ntuple(
241 csk->cdev->ports[csk->port_id],
242 csk->l2t)));
3bd3e8bf
KX		 243 opt2 |= 1 << 31;
244 req->opt2 = cpu_to_be32(opt2);
245
246 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
247 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
248 csk, &req->local_ip, ntohs(req->local_port),
249 &req->peer_ip, ntohs(req->peer_port),
250 csk->atid, csk->rss_qid);
251 }
252
253 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
759a0cc5
AB		 254
255 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
256 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
257 csk->state, csk->flags, csk->atid, csk->rss_qid);
258
259 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
260}
261
f42bb57c 262#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 263static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
264 struct l2t_entry *e)
265{
266 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
267 int t4 = is_t4(lldi->adapter_type);
268 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
269 unsigned long long opt0;
270 unsigned int opt2;
271 unsigned int qid_atid = ((unsigned int)csk->atid) |
272 (((unsigned int)csk->rss_qid) << 14);
273
d7990b0c
AB		 274 opt0 = KEEP_ALIVE_F |
275 WND_SCALE_V(wscale) |
276 MSS_IDX_V(csk->mss_idx) |
277 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
278 TX_CHAN_V(csk->tx_chan) |
279 SMAC_SEL_V(csk->smac_idx) |
280 ULP_MODE_V(ULP_MODE_ISCSI) |
281 RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10);
759a0cc5 282
d7990b0c
AB		 283 opt2 = RX_CHANNEL_V(0) |
284 RSS_QUEUE_VALID_F |
285 RX_FC_DISABLE_F |
286 RSS_QUEUE_V(csk->rss_qid);
759a0cc5
AB		 287
288 if (t4) {
289 struct cpl_act_open_req6 *req =
290 (struct cpl_act_open_req6 *)skb->head;
291
292 INIT_TP_WR(req, 0);
293 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
294 qid_atid));
295 req->local_port = csk->saddr6.sin6_port;
296 req->peer_port = csk->daddr6.sin6_port;
297
298 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
299 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
300 8);
301 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
302 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
303 8);
304
305 req->opt0 = cpu_to_be64(opt0);
306
d7990b0c 307 opt2 |= RX_FC_VALID_F;
759a0cc5
AB		 308 req->opt2 = cpu_to_be32(opt2);
309
310 req->params = cpu_to_be32(cxgb4_select_ntuple(
311 csk->cdev->ports[csk->port_id],
312 csk->l2t));
313 } else {
314 struct cpl_t5_act_open_req6 *req =
315 (struct cpl_t5_act_open_req6 *)skb->head;
316
317 INIT_TP_WR(req, 0);
318 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
319 qid_atid));
320 req->local_port = csk->saddr6.sin6_port;
321 req->peer_port = csk->daddr6.sin6_port;
322 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
323 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
324 8);
325 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
326 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
327 8);
328 req->opt0 = cpu_to_be64(opt0);
329
d7990b0c 330 opt2 |= T5_OPT_2_VALID_F;
759a0cc5
AB		 331 req->opt2 = cpu_to_be32(opt2);
332
d7990b0c 333 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
759a0cc5
AB		 334 csk->cdev->ports[csk->port_id],
335 csk->l2t)));
336 }
337
338 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
339
340 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
341 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
342 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
343 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
344 csk->rss_qid);
345
7b36b6e0 346 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
347}
f42bb57c 348#endif
7b36b6e0 349
350static void send_close_req(struct cxgbi_sock *csk)
351{
352 struct sk_buff *skb = csk->cpl_close;
353 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
354 unsigned int tid = csk->tid;
355
356 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
357 "csk 0x%p,%u,0x%lx, tid %u.\n",
358 csk, csk->state, csk->flags, csk->tid);
359 csk->cpl_close = NULL;
360 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
361 INIT_TP_WR(req, tid);
362 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
363 req->rsvd = 0;
364
365 cxgbi_sock_skb_entail(csk, skb);
366 if (csk->state >= CTP_ESTABLISHED)
367 push_tx_frames(csk, 1);
368}
369
370static void abort_arp_failure(void *handle, struct sk_buff *skb)
371{
372 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
373 struct cpl_abort_req *req;
374
375 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
376 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
377 csk, csk->state, csk->flags, csk->tid);
378 req = (struct cpl_abort_req *)skb->data;
379 req->cmd = CPL_ABORT_NO_RST;
380 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
381}
382
383static void send_abort_req(struct cxgbi_sock *csk)
384{
385 struct cpl_abort_req *req;
386 struct sk_buff *skb = csk->cpl_abort_req;
387
388 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
389 return;
64bfead8
KX		 390
391 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
392 send_tx_flowc_wr(csk);
393 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
394 }
395
7b36b6e0 396 cxgbi_sock_set_state(csk, CTP_ABORTING);
397 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
398 cxgbi_sock_purge_write_queue(csk);
399
400 csk->cpl_abort_req = NULL;
401 req = (struct cpl_abort_req *)skb->head;
2126bc5e 402 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
7b36b6e0 403 req->cmd = CPL_ABORT_SEND_RST;
404 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
405 INIT_TP_WR(req, csk->tid);
406 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
407 req->rsvd0 = htonl(csk->snd_nxt);
408 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
409
410 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
411 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
412 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
413 req->rsvd1);
414
415 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
416}
417
418static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
419{
420 struct sk_buff *skb = csk->cpl_abort_rpl;
421 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
422
423 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
424 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
425 csk, csk->state, csk->flags, csk->tid, rst_status);
426
427 csk->cpl_abort_rpl = NULL;
2126bc5e 428 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
7b36b6e0 429 INIT_TP_WR(rpl, csk->tid);
430 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
431 rpl->cmd = rst_status;
432 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
433}
434
435/*
436 * CPL connection rx data ack: host ->
437 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
438 * credits sent.
439 */
440static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
441{
442 struct sk_buff *skb;
443 struct cpl_rx_data_ack *req;
444
445 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
446 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
447 csk, csk->state, csk->flags, csk->tid, credits);
448
24d3f95a 449 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
7b36b6e0 450 if (!skb) {
451 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
452 return 0;
453 }
454 req = (struct cpl_rx_data_ack *)skb->head;
455
456 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
457 INIT_TP_WR(req, csk->tid);
458 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
459 csk->tid));
d7990b0c
AB		 460 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
461 | RX_FORCE_ACK_F);
7b36b6e0 462 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
463 return credits;
464}
465
466/*
467 * sgl_len - calculates the size of an SGL of the given capacity
468 * @n: the number of SGL entries
469 * Calculates the number of flits needed for a scatter/gather list that
470 * can hold the given number of entries.
471 */
472static inline unsigned int sgl_len(unsigned int n)
473{
474 n--;
475 return (3 * n) / 2 + (n & 1) + 2;
476}
477
478/*
479 * calc_tx_flits_ofld - calculate # of flits for an offload packet
480 * @skb: the packet
481 *
482 * Returns the number of flits needed for the given offload packet.
483 * These packets are already fully constructed and no additional headers
484 * will be added.
485 */
486static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
487{
488 unsigned int flits, cnt;
489
490 if (is_ofld_imm(skb))
491 return DIV_ROUND_UP(skb->len, 8);
492 flits = skb_transport_offset(skb) / 8;
493 cnt = skb_shinfo(skb)->nr_frags;
499e2e6f 494 if (skb_tail_pointer(skb) != skb_transport_header(skb))
7b36b6e0 495 cnt++;
496 return flits + sgl_len(cnt);
497}
498
64bfead8
KX		 499#define FLOWC_WR_NPARAMS_MIN 9
500static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
501{
502 int nparams, flowclen16, flowclen;
503
504 nparams = FLOWC_WR_NPARAMS_MIN;
505 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
506 flowclen16 = DIV_ROUND_UP(flowclen, 16);
507 flowclen = flowclen16 * 16;
508 /*
509 * Return the number of 16-byte credits used by the FlowC request.
510 * Pass back the nparams and actual FlowC length if requested.
511 */
512 if (nparamsp)
513 *nparamsp = nparams;
514 if (flowclenp)
515 *flowclenp = flowclen;
516
517 return flowclen16;
518}
519
520static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
7b36b6e0 521{
522 struct sk_buff *skb;
523 struct fw_flowc_wr *flowc;
64bfead8 524 int nparams, flowclen16, flowclen;
7b36b6e0 525
64bfead8 526 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
24d3f95a 527 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
7b36b6e0 528 flowc = (struct fw_flowc_wr *)skb->head;
529 flowc->op_to_nparams =
64bfead8 530 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
7b36b6e0 531 flowc->flowid_len16 =
64bfead8 532 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
7b36b6e0 533 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
e27d6169 534 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
7b36b6e0 535 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
536 flowc->mnemval[1].val = htonl(csk->tx_chan);
537 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
538 flowc->mnemval[2].val = htonl(csk->tx_chan);
539 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
540 flowc->mnemval[3].val = htonl(csk->rss_qid);
541 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
542 flowc->mnemval[4].val = htonl(csk->snd_nxt);
543 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
544 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
545 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
546 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
547 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
548 flowc->mnemval[7].val = htonl(csk->advmss);
549 flowc->mnemval[8].mnemonic = 0;
550 flowc->mnemval[8].val = 0;
64bfead8
KX		 551 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
552 flowc->mnemval[8].val = 16384;
553
2126bc5e 554 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
7b36b6e0 555
556 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
557 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
558 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
559 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
560 csk->advmss);
561
562 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
64bfead8
KX		 563
564 return flowclen16;
7b36b6e0 565}
566
567static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
568 int dlen, int len, u32 credits, int compl)
569{
570 struct fw_ofld_tx_data_wr *req;
571 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
e2ac9628 572 unsigned int wr_ulp_mode = 0, val;
7857c62a 573 bool imm = is_ofld_imm(skb);
7b36b6e0 574
575 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
576
7857c62a 577 if (imm) {
e2ac9628
HS		 578 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
579 FW_WR_COMPL_F |
580 FW_WR_IMMDLEN_V(dlen));
581 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
582 FW_WR_LEN16_V(credits));
7b36b6e0 583 } else {
584 req->op_to_immdlen =
e2ac9628
HS		 585 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
586 FW_WR_COMPL_F |
587 FW_WR_IMMDLEN_V(0));
7b36b6e0 588 req->flowid_len16 =
e2ac9628
HS		 589 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
590 FW_WR_LEN16_V(credits));
7b36b6e0 591 }
592 if (submode)
e2ac9628
HS		 593 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
594 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
595 val = skb_peek(&csk->write_queue) ? 0 : 1;
6aca4112 596 req->tunnel_to_proxy = htonl(wr_ulp_mode |
e2ac9628 597 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
7b36b6e0 598 req->plen = htonl(len);
599 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
600 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
601}
602
603static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
604{
605 kfree_skb(skb);
606}
607
608static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
609{
610 int total_size = 0;
611 struct sk_buff *skb;
612
613 if (unlikely(csk->state < CTP_ESTABLISHED ||
614 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
615 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
616 1 << CXGBI_DBG_PDU_TX,
617 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
618 csk, csk->state, csk->flags, csk->tid);
619 return 0;
620 }
621
622 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
623 int dlen = skb->len;
624 int len = skb->len;
625 unsigned int credits_needed;
64bfead8 626 int flowclen16 = 0;
7b36b6e0 627
628 skb_reset_transport_header(skb);
629 if (is_ofld_imm(skb))
84944d8c 630 credits_needed = DIV_ROUND_UP(dlen, 16);
7b36b6e0 631 else
84944d8c
KX		 632 credits_needed = DIV_ROUND_UP(
633 8 * calc_tx_flits_ofld(skb),
634 16);
635
636 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
637 credits_needed += DIV_ROUND_UP(
638 sizeof(struct fw_ofld_tx_data_wr),
7b36b6e0 639 16);
640
64bfead8
KX		 641 /*
642 * Assumes the initial credits is large enough to support
643 * fw_flowc_wr plus largest possible first payload
644 */
645 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
646 flowclen16 = send_tx_flowc_wr(csk);
647 csk->wr_cred -= flowclen16;
648 csk->wr_una_cred += flowclen16;
649 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
650 }
651
7b36b6e0 652 if (csk->wr_cred < credits_needed) {
653 log_debug(1 << CXGBI_DBG_PDU_TX,
654 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
655 csk, skb->len, skb->data_len,
656 credits_needed, csk->wr_cred);
657 break;
658 }
659 __skb_unlink(skb, &csk->write_queue);
2126bc5e 660 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
64bfead8 661 skb->csum = credits_needed + flowclen16;
7b36b6e0 662 csk->wr_cred -= credits_needed;
663 csk->wr_una_cred += credits_needed;
664 cxgbi_sock_enqueue_wr(csk, skb);
665
666 log_debug(1 << CXGBI_DBG_PDU_TX,
667 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
668 csk, skb->len, skb->data_len, credits_needed,
669 csk->wr_cred, csk->wr_una_cred);
670
671 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
7b36b6e0 672 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
673 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
674 req_completion);
675 csk->snd_nxt += len;
676 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
677 }
678 total_size += skb->truesize;
679 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
680
681 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
682 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
683 csk, csk->state, csk->flags, csk->tid, skb, len);
684
685 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
686 }
687 return total_size;
688}
689
690static inline void free_atid(struct cxgbi_sock *csk)
691{
692 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
693
694 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
695 cxgb4_free_atid(lldi->tids, csk->atid);
696 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
697 cxgbi_sock_put(csk);
698 }
699}
700
701static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
702{
703 struct cxgbi_sock *csk;
704 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
705 unsigned short tcp_opt = ntohs(req->tcp_opt);
706 unsigned int tid = GET_TID(req);
707 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
708 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
709 struct tid_info *t = lldi->tids;
710 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
711
712 csk = lookup_atid(t, atid);
713 if (unlikely(!csk)) {
714 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
715 goto rel_skb;
716 }
717
e27d6169 718 if (csk->atid != atid) {
719 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
720 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
721 goto rel_skb;
722 }
723
759a0cc5
AB		 724 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
725 (&csk->saddr), (&csk->daddr),
726 atid, tid, csk, csk->state, csk->flags, rcv_isn);
727
728 module_put(THIS_MODULE);
7b36b6e0 729
730 cxgbi_sock_get(csk);
731 csk->tid = tid;
732 cxgb4_insert_tid(lldi->tids, csk, tid);
733 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
734
735 free_atid(csk);
736
737 spin_lock_bh(&csk->lock);
738 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
739 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
740 csk, csk->state, csk->flags, csk->tid);
741
742 if (csk->retry_timer.function) {
743 del_timer(&csk->retry_timer);
744 csk->retry_timer.function = NULL;
745 }
746
747 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
748 /*
749 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
750 * pass through opt0.
751 */
752 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
753 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
754
755 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
756 if (GET_TCPOPT_TSTAMP(tcp_opt))
757 csk->advmss -= 12;
758 if (csk->advmss < 128)
759 csk->advmss = 128;
760
761 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
762 "csk 0x%p, mss_idx %u, advmss %u.\n",
763 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
764
765 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
766
767 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
768 send_abort_req(csk);
769 else {
770 if (skb_queue_len(&csk->write_queue))
771 push_tx_frames(csk, 0);
772 cxgbi_conn_tx_open(csk);
773 }
774 spin_unlock_bh(&csk->lock);
775
776rel_skb:
777 __kfree_skb(skb);
778}
779
780static int act_open_rpl_status_to_errno(int status)
781{
782 switch (status) {
783 case CPL_ERR_CONN_RESET:
784 return -ECONNREFUSED;
785 case CPL_ERR_ARP_MISS:
786 return -EHOSTUNREACH;
787 case CPL_ERR_CONN_TIMEDOUT:
788 return -ETIMEDOUT;
789 case CPL_ERR_TCAM_FULL:
790 return -ENOMEM;
791 case CPL_ERR_CONN_EXIST:
792 return -EADDRINUSE;
793 default:
794 return -EIO;
795 }
796}
797
798static void csk_act_open_retry_timer(unsigned long data)
799{
001586a7 800 struct sk_buff *skb = NULL;
7b36b6e0 801 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
3bd3e8bf 802 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
759a0cc5
AB		 803 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
804 struct l2t_entry *);
805 int t4 = is_t4(lldi->adapter_type), size, size6;
7b36b6e0 806
807 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
808 "csk 0x%p,%u,0x%lx,%u.\n",
809 csk, csk->state, csk->flags, csk->tid);
810
811 cxgbi_sock_get(csk);
812 spin_lock_bh(&csk->lock);
759a0cc5
AB		 813
814 if (t4) {
815 size = sizeof(struct cpl_act_open_req);
816 size6 = sizeof(struct cpl_act_open_req6);
817 } else {
818 size = sizeof(struct cpl_t5_act_open_req);
819 size6 = sizeof(struct cpl_t5_act_open_req6);
820 }
821
822 if (csk->csk_family == AF_INET) {
823 send_act_open_func = send_act_open_req;
824 skb = alloc_wr(size, 0, GFP_ATOMIC);
f42bb57c 825#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 826 } else {
827 send_act_open_func = send_act_open_req6;
828 skb = alloc_wr(size6, 0, GFP_ATOMIC);
f42bb57c 829#endif
759a0cc5
AB		 830 }
831
7b36b6e0 832 if (!skb)
833 cxgbi_sock_fail_act_open(csk, -ENOMEM);
834 else {
835 skb->sk = (struct sock *)csk;
836 t4_set_arp_err_handler(skb, csk,
759a0cc5
AB		 837 cxgbi_sock_act_open_req_arp_failure);
838 send_act_open_func(csk, skb, csk->l2t);
7b36b6e0 839 }
759a0cc5 840
7b36b6e0 841 spin_unlock_bh(&csk->lock);
842 cxgbi_sock_put(csk);
759a0cc5 843
7b36b6e0 844}
845
928567ad
KX		 846static inline bool is_neg_adv(unsigned int status)
847{
848 return status == CPL_ERR_RTX_NEG_ADVICE ||
849 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
850 status == CPL_ERR_PERSIST_NEG_ADVICE;
851}
852
7b36b6e0 853static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
854{
855 struct cxgbi_sock *csk;
856 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
857 unsigned int tid = GET_TID(rpl);
858 unsigned int atid =
859 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
860 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
861 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
862 struct tid_info *t = lldi->tids;
863
864 csk = lookup_atid(t, atid);
865 if (unlikely(!csk)) {
866 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
867 goto rel_skb;
868 }
869
759a0cc5
AB		 870 pr_info_ipaddr("tid %u/%u, status %u.\n"
871 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
872 atid, tid, status, csk, csk->state, csk->flags);
7b36b6e0 873
928567ad 874 if (is_neg_adv(status))
150cca7c
KX		 875 goto rel_skb;
876
ee7255ad
AB		 877 module_put(THIS_MODULE);
878
7b36b6e0 879 if (status && status != CPL_ERR_TCAM_FULL &&
880 status != CPL_ERR_CONN_EXIST &&
881 status != CPL_ERR_ARP_MISS)
882 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
883
884 cxgbi_sock_get(csk);
885 spin_lock_bh(&csk->lock);
886
887 if (status == CPL_ERR_CONN_EXIST &&
888 csk->retry_timer.function != csk_act_open_retry_timer) {
889 csk->retry_timer.function = csk_act_open_retry_timer;
890 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
891 } else
892 cxgbi_sock_fail_act_open(csk,
893 act_open_rpl_status_to_errno(status));
894
895 spin_unlock_bh(&csk->lock);
896 cxgbi_sock_put(csk);
897rel_skb:
898 __kfree_skb(skb);
899}
900
901static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
902{
903 struct cxgbi_sock *csk;
904 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
905 unsigned int tid = GET_TID(req);
906 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
907 struct tid_info *t = lldi->tids;
908
909 csk = lookup_tid(t, tid);
910 if (unlikely(!csk)) {
911 pr_err("can't find connection for tid %u.\n", tid);
912 goto rel_skb;
913 }
759a0cc5
AB		 914 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
915 (&csk->saddr), (&csk->daddr),
916 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 917 cxgbi_sock_rcv_peer_close(csk);
918rel_skb:
919 __kfree_skb(skb);
920}
921
922static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
923{
924 struct cxgbi_sock *csk;
925 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
926 unsigned int tid = GET_TID(rpl);
927 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
928 struct tid_info *t = lldi->tids;
929
930 csk = lookup_tid(t, tid);
931 if (unlikely(!csk)) {
932 pr_err("can't find connection for tid %u.\n", tid);
933 goto rel_skb;
934 }
759a0cc5
AB		 935 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
936 (&csk->saddr), (&csk->daddr),
937 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 938 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
939rel_skb:
940 __kfree_skb(skb);
941}
942
943static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
944 int *need_rst)
945{
946 switch (abort_reason) {
947 case CPL_ERR_BAD_SYN: /* fall through */
948 case CPL_ERR_CONN_RESET:
949 return csk->state > CTP_ESTABLISHED ?
950 -EPIPE : -ECONNRESET;
951 case CPL_ERR_XMIT_TIMEDOUT:
952 case CPL_ERR_PERSIST_TIMEDOUT:
953 case CPL_ERR_FINWAIT2_TIMEDOUT:
954 case CPL_ERR_KEEPALIVE_TIMEDOUT:
955 return -ETIMEDOUT;
956 default:
957 return -EIO;
958 }
959}
960
961static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
962{
963 struct cxgbi_sock *csk;
964 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
965 unsigned int tid = GET_TID(req);
966 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
967 struct tid_info *t = lldi->tids;
968 int rst_status = CPL_ABORT_NO_RST;
969
970 csk = lookup_tid(t, tid);
971 if (unlikely(!csk)) {
972 pr_err("can't find connection for tid %u.\n", tid);
973 goto rel_skb;
974 }
975
759a0cc5
AB		 976 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
977 (&csk->saddr), (&csk->daddr),
978 csk, csk->state, csk->flags, csk->tid, req->status);
7b36b6e0 979
928567ad 980 if (is_neg_adv(req->status))
7b36b6e0 981 goto rel_skb;
982
983 cxgbi_sock_get(csk);
984 spin_lock_bh(&csk->lock);
985
7b07bf24
AB		 986 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
987
988 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
989 send_tx_flowc_wr(csk);
990 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
7b36b6e0 991 }
992
7b07bf24
AB		 993 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
994 cxgbi_sock_set_state(csk, CTP_ABORTING);
995
7b36b6e0 996 send_abort_rpl(csk, rst_status);
997
998 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
999 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1000 cxgbi_sock_closed(csk);
1001 }
7b07bf24 1002
7b36b6e0 1003 spin_unlock_bh(&csk->lock);
1004 cxgbi_sock_put(csk);
1005rel_skb:
1006 __kfree_skb(skb);
1007}
1008
1009static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1010{
1011 struct cxgbi_sock *csk;
1012 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1013 unsigned int tid = GET_TID(rpl);
1014 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1015 struct tid_info *t = lldi->tids;
1016
1017 csk = lookup_tid(t, tid);
1018 if (!csk)
1019 goto rel_skb;
1020
759a0cc5
AB		 1021 if (csk)
1022 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1023 (&csk->saddr), (&csk->daddr), csk,
1024 csk->state, csk->flags, csk->tid, rpl->status);
7b36b6e0 1025
1026 if (rpl->status == CPL_ERR_ABORT_FAILED)
1027 goto rel_skb;
1028
1029 cxgbi_sock_rcv_abort_rpl(csk);
1030rel_skb:
1031 __kfree_skb(skb);
1032}
1033
f7bcd2e1
KX		 1034static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1035{
1036 struct cxgbi_sock *csk;
1037 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1038 unsigned int tid = GET_TID(cpl);
1039 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1040 struct tid_info *t = lldi->tids;
1041
1042 csk = lookup_tid(t, tid);
1043 if (!csk) {
1044 pr_err("can't find connection for tid %u.\n", tid);
1045 } else {
1046 /* not expecting this, reset the connection. */
1047 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1048 spin_lock_bh(&csk->lock);
1049 send_abort_req(csk);
1050 spin_unlock_bh(&csk->lock);
1051 }
1052 __kfree_skb(skb);
1053}
1054
7b36b6e0 1055static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1056{
1057 struct cxgbi_sock *csk;
1058 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1059 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1060 unsigned int tid = GET_TID(cpl);
1061 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1062 struct tid_info *t = lldi->tids;
7b36b6e0 1063
1064 csk = lookup_tid(t, tid);
1065 if (unlikely(!csk)) {
1066 pr_err("can't find conn. for tid %u.\n", tid);
1067 goto rel_skb;
1068 }
1069
1070 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1071 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1072 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1073 pdu_len_ddp);
1074
1075 spin_lock_bh(&csk->lock);
1076
1077 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1078 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1079 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1080 csk, csk->state, csk->flags, csk->tid);
1081 if (csk->state != CTP_ABORTING)
1082 goto abort_conn;
1083 else
1084 goto discard;
1085 }
1086
1087 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 1088 cxgbi_skcb_flags(skb) = 0;
1089
7b36b6e0 1090 skb_reset_transport_header(skb);
1091 __skb_pull(skb, sizeof(*cpl));
1092 __pskb_trim(skb, ntohs(cpl->len));
1093
1094 if (!csk->skb_ulp_lhdr) {
1095 unsigned char *bhs;
3bd3e8bf 1096 unsigned int hlen, dlen, plen;
7b36b6e0 1097
1098 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1099 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1100 csk, csk->state, csk->flags, csk->tid, skb);
1101 csk->skb_ulp_lhdr = skb;
e27d6169 1102 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 1103
e27d6169 1104 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 1105 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 1106 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 1107 csk->rcv_nxt);
1108 goto abort_conn;
1109 }
1110
e27d6169 1111 bhs = skb->data;
7b36b6e0 1112 hlen = ntohs(cpl->len);
1113 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1114
3bd3e8bf
KX		 1115 plen = ISCSI_PDU_LEN(pdu_len_ddp);
1116 if (is_t4(lldi->adapter_type))
1117 plen -= 40;
1118
1119 if ((hlen + dlen) != plen) {
7b36b6e0 1120 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1121 "mismatch %u != %u + %u, seq 0x%x.\n",
3bd3e8bf
KX		 1122 csk->tid, plen, hlen, dlen,
1123 cxgbi_skcb_tcp_seq(skb));
7b36b6e0 1124 goto abort_conn;
1125 }
1126
1127 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1128 if (dlen)
1129 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1130 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1131
1132 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1133 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1134 csk, skb, *bhs, hlen, dlen,
1135 ntohl(*((unsigned int *)(bhs + 16))),
1136 ntohl(*((unsigned int *)(bhs + 24))));
1137
1138 } else {
e27d6169 1139 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 1140
e27d6169 1141 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 1142 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1143 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1144 csk, csk->state, csk->flags, skb, lskb);
1145 }
1146
1147 __skb_queue_tail(&csk->receive_queue, skb);
1148 spin_unlock_bh(&csk->lock);
1149 return;
1150
1151abort_conn:
1152 send_abort_req(csk);
1153discard:
1154 spin_unlock_bh(&csk->lock);
1155rel_skb:
1156 __kfree_skb(skb);
1157}
1158
1159static void do_rx_data_ddp(struct cxgbi_device *cdev,
1160 struct sk_buff *skb)
1161{
1162 struct cxgbi_sock *csk;
1163 struct sk_buff *lskb;
1164 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1165 unsigned int tid = GET_TID(rpl);
1166 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1167 struct tid_info *t = lldi->tids;
1168 unsigned int status = ntohl(rpl->ddpvld);
1169
1170 csk = lookup_tid(t, tid);
1171 if (unlikely(!csk)) {
1172 pr_err("can't find connection for tid %u.\n", tid);
1173 goto rel_skb;
1174 }
1175
1176 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1177 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1178 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1179
1180 spin_lock_bh(&csk->lock);
1181
1182 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1183 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1184 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1185 csk, csk->state, csk->flags, csk->tid);
1186 if (csk->state != CTP_ABORTING)
1187 goto abort_conn;
1188 else
1189 goto discard;
1190 }
1191
1192 if (!csk->skb_ulp_lhdr) {
1193 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1194 goto abort_conn;
1195 }
1196
1197 lskb = csk->skb_ulp_lhdr;
1198 csk->skb_ulp_lhdr = NULL;
1199
7b36b6e0 1200 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1201
1202 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1203 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1204 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1205
1206 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
e27d6169 1207 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1208 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1209 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1210 }
1211 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
e27d6169 1212 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1213 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1214 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1215 }
1216 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1217 log_debug(1 << CXGBI_DBG_PDU_RX,
1218 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1219 csk, lskb, status);
1220 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1221 }
1222 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1223 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1224 log_debug(1 << CXGBI_DBG_PDU_RX,
1225 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1226 csk, lskb, status);
1227 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1228 }
1229 log_debug(1 << CXGBI_DBG_PDU_RX,
1230 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1231 csk, lskb, cxgbi_skcb_flags(lskb));
1232
e27d6169 1233 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1234 cxgbi_conn_pdu_ready(csk);
1235 spin_unlock_bh(&csk->lock);
1236 goto rel_skb;
1237
1238abort_conn:
1239 send_abort_req(csk);
1240discard:
1241 spin_unlock_bh(&csk->lock);
1242rel_skb:
1243 __kfree_skb(skb);
1244}
1245
1246static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1247{
1248 struct cxgbi_sock *csk;
1249 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1250 unsigned int tid = GET_TID(rpl);
1251 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1252 struct tid_info *t = lldi->tids;
1253
1254 csk = lookup_tid(t, tid);
1255 if (unlikely(!csk))
1256 pr_err("can't find connection for tid %u.\n", tid);
1257 else {
1258 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1259 "csk 0x%p,%u,0x%lx,%u.\n",
1260 csk, csk->state, csk->flags, csk->tid);
1261 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1262 rpl->seq_vld);
1263 }
1264 __kfree_skb(skb);
1265}
1266
1267static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1268{
1269 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1270 unsigned int tid = GET_TID(rpl);
1271 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1272 struct tid_info *t = lldi->tids;
1273 struct cxgbi_sock *csk;
1274
1275 csk = lookup_tid(t, tid);
1276 if (!csk)
1277 pr_err("can't find conn. for tid %u.\n", tid);
1278
1279 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1280 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1281 csk, csk->state, csk->flags, csk->tid, rpl->status);
1282
1283 if (rpl->status != CPL_ERR_NONE)
1284 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1285 csk, tid, rpl->status);
1286
1287 __kfree_skb(skb);
1288}
1289
1290static int alloc_cpls(struct cxgbi_sock *csk)
1291{
24d3f95a 1292 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1293 0, GFP_KERNEL);
7b36b6e0 1294 if (!csk->cpl_close)
1295 return -ENOMEM;
1296
24d3f95a 1297 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1298 0, GFP_KERNEL);
7b36b6e0 1299 if (!csk->cpl_abort_req)
1300 goto free_cpls;
1301
24d3f95a 1302 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1303 0, GFP_KERNEL);
7b36b6e0 1304 if (!csk->cpl_abort_rpl)
1305 goto free_cpls;
1306 return 0;
1307
1308free_cpls:
1309 cxgbi_sock_free_cpl_skbs(csk);
1310 return -ENOMEM;
1311}
1312
1313static inline void l2t_put(struct cxgbi_sock *csk)
1314{
1315 if (csk->l2t) {
1316 cxgb4_l2t_release(csk->l2t);
1317 csk->l2t = NULL;
1318 cxgbi_sock_put(csk);
1319 }
1320}
1321
1322static void release_offload_resources(struct cxgbi_sock *csk)
1323{
1324 struct cxgb4_lld_info *lldi;
1325
1326 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1327 "csk 0x%p,%u,0x%lx,%u.\n",
1328 csk, csk->state, csk->flags, csk->tid);
1329
1330 cxgbi_sock_free_cpl_skbs(csk);
1331 if (csk->wr_cred != csk->wr_max_cred) {
1332 cxgbi_sock_purge_wr_queue(csk);
1333 cxgbi_sock_reset_wr_list(csk);
1334 }
1335
1336 l2t_put(csk);
1337 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1338 free_atid(csk);
1339 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1340 lldi = cxgbi_cdev_priv(csk->cdev);
1341 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1342 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1343 cxgbi_sock_put(csk);
1344 }
1345 csk->dst = NULL;
1346 csk->cdev = NULL;
1347}
1348
1349static int init_act_open(struct cxgbi_sock *csk)
1350{
1351 struct cxgbi_device *cdev = csk->cdev;
1352 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1353 struct net_device *ndev = cdev->ports[csk->port_id];
7b36b6e0 1354 struct sk_buff *skb = NULL;
759a0cc5
AB		 1355 struct neighbour *n = NULL;
1356 void *daddr;
7b36b6e0 1357 unsigned int step;
759a0cc5
AB		 1358 unsigned int size, size6;
1359 int t4 = is_t4(lldi->adapter_type);
7b36b6e0 1360
1361 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1362 "csk 0x%p,%u,0x%lx,%u.\n",
1363 csk, csk->state, csk->flags, csk->tid);
1364
759a0cc5
AB		 1365 if (csk->csk_family == AF_INET)
1366 daddr = &csk->daddr.sin_addr.s_addr;
e81fbf6c
AB		 1367#if IS_ENABLED(CONFIG_IPV6)
1368 else if (csk->csk_family == AF_INET6)
759a0cc5 1369 daddr = &csk->daddr6.sin6_addr;
e81fbf6c
AB		 1370#endif
1371 else {
1372 pr_err("address family 0x%x not supported\n", csk->csk_family);
1373 goto rel_resource;
1374 }
759a0cc5
AB		 1375
1376 n = dst_neigh_lookup(csk->dst, daddr);
1377
1378 if (!n) {
1379 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1380 goto rel_resource;
1381 }
1382
7b36b6e0 1383 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1384 if (csk->atid < 0) {
1385 pr_err("%s, NO atid available.\n", ndev->name);
1386 return -EINVAL;
1387 }
1388 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1389 cxgbi_sock_get(csk);
1390
51e059bd 1391 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
7b36b6e0 1392 if (!csk->l2t) {
1393 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1394 goto rel_resource;
1395 }
1396 cxgbi_sock_get(csk);
1397
759a0cc5
AB		 1398 if (t4) {
1399 size = sizeof(struct cpl_act_open_req);
1400 size6 = sizeof(struct cpl_act_open_req6);
1401 } else {
1402 size = sizeof(struct cpl_t5_act_open_req);
1403 size6 = sizeof(struct cpl_t5_act_open_req6);
1404 }
1405
1406 if (csk->csk_family == AF_INET)
1407 skb = alloc_wr(size, 0, GFP_NOIO);
f42bb57c 1408#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1409 else
1410 skb = alloc_wr(size6, 0, GFP_NOIO);
f42bb57c 1411#endif
759a0cc5 1412
7b36b6e0 1413 if (!skb)
1414 goto rel_resource;
1415 skb->sk = (struct sock *)csk;
1416 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1417
1418 if (!csk->mtu)
1419 csk->mtu = dst_mtu(csk->dst);
1420 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1421 csk->tx_chan = cxgb4_port_chan(ndev);
1422 /* SMT two entries per row */
1423 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1424 step = lldi->ntxq / lldi->nchan;
1425 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1426 step = lldi->nrxq / lldi->nchan;
1427 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
759a0cc5
AB		 1428 csk->wr_cred = lldi->wr_cred -
1429 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1430 csk->wr_max_cred = csk->wr_cred;
7b36b6e0 1431 csk->wr_una_cred = 0;
1432 cxgbi_sock_reset_wr_list(csk);
1433 csk->err = 0;
7b36b6e0 1434
759a0cc5
AB		 1435 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1436 (&csk->saddr), (&csk->daddr), csk, csk->state,
1437 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1438 csk->mtu, csk->mss_idx, csk->smac_idx);
1439
1440 /* must wait for either a act_open_rpl or act_open_establish */
1441 try_module_get(THIS_MODULE);
7b36b6e0 1442 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
759a0cc5
AB		 1443 if (csk->csk_family == AF_INET)
1444 send_act_open_req(csk, skb, csk->l2t);
f42bb57c 1445#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1446 else
1447 send_act_open_req6(csk, skb, csk->l2t);
f42bb57c 1448#endif
c4737377 1449 neigh_release(n);
759a0cc5 1450
7b36b6e0 1451 return 0;
1452
1453rel_resource:
c4737377
DM		 1454 if (n)
1455 neigh_release(n);
7b36b6e0 1456 if (skb)
1457 __kfree_skb(skb);
1458 return -EINVAL;
1459}
1460
1461cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1462 [CPL_ACT_ESTABLISH] = do_act_establish,
1463 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1464 [CPL_PEER_CLOSE] = do_peer_close,
1465 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1466 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1467 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1468 [CPL_FW4_ACK] = do_fw4_ack,
1469 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
3bd3e8bf 1470 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
7b36b6e0 1471 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1472 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
3bd3e8bf 1473 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
f7bcd2e1 1474 [CPL_RX_DATA] = do_rx_data,
7b36b6e0 1475};
1476
1477int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1478{
1479 int rc;
1480
1481 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1482 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1483
1484 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1485 cxgb4i_max_connect);
1486 if (rc < 0)
1487 return rc;
1488
1489 cdev->csk_release_offload_resources = release_offload_resources;
1490 cdev->csk_push_tx_frames = push_tx_frames;
1491 cdev->csk_send_abort_req = send_abort_req;
1492 cdev->csk_send_close_req = send_close_req;
1493 cdev->csk_send_rx_credits = send_rx_credits;
1494 cdev->csk_alloc_cpls = alloc_cpls;
1495 cdev->csk_init_act_open = init_act_open;
1496
1497 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1498 return 0;
1499}
1500
1501/*
1502 * functions to program the pagepod in h/w
1503 */
e27d6169 1504#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
3bd3e8bf
KX		 1505static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1506 struct ulp_mem_io *req,
e27d6169 1507 unsigned int wr_len, unsigned int dlen,
1508 unsigned int pm_addr)
7b36b6e0 1509{
e27d6169 1510 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
7b36b6e0 1511
1512 INIT_ULPTX_WR(req, wr_len, 0, 0);
3bd3e8bf 1513 if (is_t4(lldi->adapter_type))
d7990b0c
AB		 1514 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1515 (ULP_MEMIO_ORDER_F));
3bd3e8bf 1516 else
d7990b0c
AB		 1517 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1518 (T5_ULP_MEMIO_IMM_F));
1519 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1520 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
7b36b6e0 1521 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
e27d6169 1522
d7990b0c 1523 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
e27d6169 1524 idata->len = htonl(dlen);
7b36b6e0 1525}
1526
e27d6169 1527static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
7b36b6e0 1528 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1529 unsigned int npods,
1530 struct cxgbi_gather_list *gl,
1531 unsigned int gl_pidx)
1532{
1533 struct cxgbi_ddp_info *ddp = cdev->ddp;
3bd3e8bf 1534 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
7b36b6e0 1535 struct sk_buff *skb;
1536 struct ulp_mem_io *req;
e27d6169 1537 struct ulptx_idata *idata;
7b36b6e0 1538 struct cxgbi_pagepod *ppod;
e27d6169 1539 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1540 unsigned int dlen = PPOD_SIZE * npods;
1541 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1542 sizeof(struct ulptx_idata) + dlen, 16);
7b36b6e0 1543 unsigned int i;
1544
e27d6169 1545 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
7b36b6e0 1546 if (!skb) {
1547 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1548 cdev, idx, npods);
1549 return -ENOMEM;
1550 }
1551 req = (struct ulp_mem_io *)skb->head;
2126bc5e 1552 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
7b36b6e0 1553
3bd3e8bf 1554 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
e27d6169 1555 idata = (struct ulptx_idata *)(req + 1);
1556 ppod = (struct cxgbi_pagepod *)(idata + 1);
7b36b6e0 1557
1558 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1559 if (!hdr && !gl)
1560 cxgbi_ddp_ppod_clear(ppod);
1561 else
1562 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1563 }
1564
1565 cxgb4_ofld_send(cdev->ports[port_id], skb);
1566 return 0;
1567}
1568
1569static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1570 unsigned int idx, unsigned int npods,
1571 struct cxgbi_gather_list *gl)
1572{
1573 unsigned int i, cnt;
1574 int err = 0;
1575
1576 for (i = 0; i < npods; i += cnt, idx += cnt) {
1577 cnt = npods - i;
e27d6169 1578 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1579 cnt = ULPMEM_IDATA_MAX_NPPODS;
1580 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
7b36b6e0 1581 idx, cnt, gl, 4 * i);
1582 if (err < 0)
1583 break;
1584 }
1585 return err;
1586}
1587
1588static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1589 unsigned int idx, unsigned int npods)
1590{
1591 unsigned int i, cnt;
1592 int err;
1593
1594 for (i = 0; i < npods; i += cnt, idx += cnt) {
1595 cnt = npods - i;
e27d6169 1596 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1597 cnt = ULPMEM_IDATA_MAX_NPPODS;
1598 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
7b36b6e0 1599 idx, cnt, NULL, 0);
1600 if (err < 0)
1601 break;
1602 }
1603}
1604
1605static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1606 int pg_idx, bool reply)
1607{
1608 struct sk_buff *skb;
1609 struct cpl_set_tcb_field *req;
7b36b6e0 1610
e27d6169 1611 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1612 return 0;
1613
24d3f95a 1614 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1615 if (!skb)
1616 return -ENOMEM;
1617
e27d6169 1618 /* set up ulp page size */
7b36b6e0 1619 req = (struct cpl_set_tcb_field *)skb->head;
1620 INIT_TP_WR(req, csk->tid);
1621 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1622 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1623 req->word_cookie = htons(0);
1624 req->mask = cpu_to_be64(0x3 << 8);
1625 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1626 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1627
1628 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1629 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1630
1631 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1632 return 0;
1633}
1634
1635static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1636 int hcrc, int dcrc, int reply)
1637{
1638 struct sk_buff *skb;
1639 struct cpl_set_tcb_field *req;
7b36b6e0 1640
e27d6169 1641 if (!hcrc && !dcrc)
1642 return 0;
7b36b6e0 1643
24d3f95a 1644 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1645 if (!skb)
1646 return -ENOMEM;
1647
1648 csk->hcrc_len = (hcrc ? 4 : 0);
1649 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1650 /* set up ulp submode */
7b36b6e0 1651 req = (struct cpl_set_tcb_field *)skb->head;
1652 INIT_TP_WR(req, tid);
1653 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1654 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1655 req->word_cookie = htons(0);
1656 req->mask = cpu_to_be64(0x3 << 4);
1657 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1658 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1659 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1660
1661 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1662 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1663
1664 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1665 return 0;
1666}
1667
1668static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1669{
1670 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1671 struct cxgbi_ddp_info *ddp = cdev->ddp;
1672 unsigned int tagmask, pgsz_factor[4];
1673 int err;
1674
1675 if (ddp) {
1676 kref_get(&ddp->refcnt);
1677 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1678 cdev, cdev->ddp);
1679 return -EALREADY;
1680 }
1681
1682 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1683 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1684 lldi->iscsi_iolen, lldi->iscsi_iolen);
1685 if (err < 0)
1686 return err;
1687
1688 ddp = cdev->ddp;
1689
1690 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1691 cxgbi_ddp_page_size_factor(pgsz_factor);
1692 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1693
7b36b6e0 1694 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1695 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1696 cdev->csk_ddp_set = ddp_set_map;
1697 cdev->csk_ddp_clear = ddp_clear_map;
1698
1699 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1700 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1701 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1702 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1703 " %u/%u.\n",
1704 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1705 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1706 ddp->max_rxsz, lldi->iscsi_iolen);
1707 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1708 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1709 ddp->max_rxsz);
1710 return 0;
1711}
1712
1713static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1714{
1715 struct cxgbi_device *cdev;
1716 struct port_info *pi;
1717 int i, rc;
1718
1719 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1720 if (!cdev) {
1721 pr_info("t4 device 0x%p, register failed.\n", lldi);
1722 return NULL;
1723 }
1724 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1725 cdev, lldi->adapter_type, lldi->nports,
1726 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1727 lldi->nrxq, lldi->wr_cred);
1728 for (i = 0; i < lldi->nrxq; i++)
1729 log_debug(1 << CXGBI_DBG_DEV,
1730 "t4 0x%p, rxq id #%d: %u.\n",
1731 cdev, i, lldi->rxq_ids[i]);
1732
1733 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1734 cdev->flags = CXGBI_FLAG_DEV_T4;
1735 cdev->pdev = lldi->pdev;
1736 cdev->ports = lldi->ports;
1737 cdev->nports = lldi->nports;
1738 cdev->mtus = lldi->mtus;
1739 cdev->nmtus = NMTUS;
1740 cdev->snd_win = cxgb4i_snd_win;
1741 cdev->rcv_win = cxgb4i_rcv_win;
1742 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1743 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1744 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1745 cdev->itp = &cxgb4i_iscsi_transport;
1746
d7990b0c
AB		 1747 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
1748 << FW_VIID_PFN_S;
e27d6169 1749 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1750 cdev, lldi->ports[0]->name, cdev->pfvf);
1751
7b36b6e0 1752 rc = cxgb4i_ddp_init(cdev);
1753 if (rc) {
1754 pr_info("t4 0x%p ddp init failed.\n", cdev);
1755 goto err_out;
1756 }
1757 rc = cxgb4i_ofld_init(cdev);
1758 if (rc) {
1759 pr_info("t4 0x%p ofld init failed.\n", cdev);
1760 goto err_out;
1761 }
1762
1763 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1764 &cxgb4i_host_template, cxgb4i_stt);
1765 if (rc)
1766 goto err_out;
1767
1768 for (i = 0; i < cdev->nports; i++) {
1769 pi = netdev_priv(lldi->ports[i]);
1770 cdev->hbas[i]->port_id = pi->port_id;
1771 }
1772 return cdev;
1773
1774err_out:
1775 cxgbi_device_unregister(cdev);
1776 return ERR_PTR(-ENOMEM);
1777}
1778
1779#define RX_PULL_LEN 128
1780static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1781 const struct pkt_gl *pgl)
1782{
1783 const struct cpl_act_establish *rpl;
1784 struct sk_buff *skb;
1785 unsigned int opc;
1786 struct cxgbi_device *cdev = handle;
1787
1788 if (pgl == NULL) {
1789 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1790
24d3f95a 1791 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 1792 if (!skb)
1793 goto nomem;
1794 skb_copy_to_linear_data(skb, &rsp[1], len);
1795 } else {
1796 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1797 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1798 pgl->va, be64_to_cpu(*rsp),
1799 be64_to_cpu(*(u64 *)pgl->va),
1800 pgl->tot_len);
1801 return 0;
1802 }
1803 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1804 if (unlikely(!skb))
1805 goto nomem;
1806 }
1807
1808 rpl = (struct cpl_act_establish *)skb->data;
1809 opc = rpl->ot.opcode;
1810 log_debug(1 << CXGBI_DBG_TOE,
1811 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1812 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1813 if (cxgb4i_cplhandlers[opc])
1814 cxgb4i_cplhandlers[opc](cdev, skb);
1815 else {
1816 pr_err("No handler for opcode 0x%x.\n", opc);
1817 __kfree_skb(skb);
1818 }
1819 return 0;
1820nomem:
1821 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1822 return 1;
1823}
1824
1825static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1826{
1827 struct cxgbi_device *cdev = handle;
1828
1829 switch (state) {
1830 case CXGB4_STATE_UP:
1831 pr_info("cdev 0x%p, UP.\n", cdev);
7b36b6e0 1832 break;
1833 case CXGB4_STATE_START_RECOVERY:
1834 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1835 /* close all connections */
1836 break;
1837 case CXGB4_STATE_DOWN:
1838 pr_info("cdev 0x%p, DOWN.\n", cdev);
1839 break;
1840 case CXGB4_STATE_DETACH:
1841 pr_info("cdev 0x%p, DETACH.\n", cdev);
c3b331a3 1842 cxgbi_device_unregister(cdev);
7b36b6e0 1843 break;
1844 default:
1845 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1846 break;
1847 }
1848 return 0;
1849}
1850
1851static int __init cxgb4i_init_module(void)
1852{
1853 int rc;
1854
1855 printk(KERN_INFO "%s", version);
1856
1857 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1858 if (rc < 0)
1859 return rc;
1860 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
759a0cc5 1861
7b36b6e0 1862 return 0;
1863}
1864
1865static void __exit cxgb4i_exit_module(void)
1866{
1867 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1868 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1869 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1870}
1871
1872module_init(cxgb4i_init_module);
1873module_exit(cxgb4i_exit_module);
Linux kernel - Deliverables
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