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[mirror_ubuntu-kernels.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
1 /*
2 * cxgb4i.c: Chelsio T4 iSCSI driver.
3 *
4 * Copyright (c) 2010-2015 Chelsio Communications, Inc.
5 *
6 * This program is free software; you can redistribute it and/or 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
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <scsi/scsi_host.h>
20 #include <net/tcp.h>
21 #include <net/dst.h>
22 #include <linux/netdevice.h>
23 #include <net/addrconf.h>
24
25 #include "t4_regs.h"
26 #include "t4_msg.h"
27 #include "cxgb4.h"
28 #include "cxgb4_uld.h"
29 #include "t4fw_api.h"
30 #include "l2t.h"
31 #include "cxgb4i.h"
32 #include "clip_tbl.h"
33
34 static unsigned int dbg_level;
35
36 #include "../libcxgbi.h"
37
38 #ifdef CONFIG_CHELSIO_T4_DCB
39 #include <net/dcbevent.h>
40 #include "cxgb4_dcb.h"
41 #endif
42
43 #define DRV_MODULE_NAME "cxgb4i"
44 #define DRV_MODULE_DESC "Chelsio T4-T6 iSCSI Driver"
45 #define DRV_MODULE_VERSION "0.9.5-ko"
46 #define DRV_MODULE_RELDATE "Apr. 2015"
47
48 static char version[] =
49 DRV_MODULE_DESC " " DRV_MODULE_NAME
50 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
51
52 MODULE_AUTHOR("Chelsio Communications, Inc.");
53 MODULE_DESCRIPTION(DRV_MODULE_DESC);
54 MODULE_VERSION(DRV_MODULE_VERSION);
55 MODULE_LICENSE("GPL");
56
57 module_param(dbg_level, uint, 0644);
58 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
59
60 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
61 static int cxgb4i_rcv_win = -1;
62 module_param(cxgb4i_rcv_win, int, 0644);
63 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
64
65 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
66 static int cxgb4i_snd_win = -1;
67 module_param(cxgb4i_snd_win, int, 0644);
68 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
69
70 static int cxgb4i_rx_credit_thres = 10 * 1024;
71 module_param(cxgb4i_rx_credit_thres, int, 0644);
72 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
73 "RX credits return threshold in bytes (default=10KB)");
74
75 static unsigned int cxgb4i_max_connect = (8 * 1024);
76 module_param(cxgb4i_max_connect, uint, 0644);
77 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
78
79 static unsigned short cxgb4i_sport_base = 20000;
80 module_param(cxgb4i_sport_base, ushort, 0644);
81 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
82
83 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
84
85 static void *t4_uld_add(const struct cxgb4_lld_info *);
86 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
87 static int t4_uld_state_change(void *, enum cxgb4_state state);
88 static inline int send_tx_flowc_wr(struct cxgbi_sock *);
89
90 static const struct cxgb4_uld_info cxgb4i_uld_info = {
91 .name = DRV_MODULE_NAME,
92 .nrxq = MAX_ULD_QSETS,
93 .ntxq = MAX_ULD_QSETS,
94 .rxq_size = 1024,
95 .lro = false,
96 .add = t4_uld_add,
97 .rx_handler = t4_uld_rx_handler,
98 .state_change = t4_uld_state_change,
99 };
100
101 static struct scsi_host_template cxgb4i_host_template = {
102 .module = THIS_MODULE,
103 .name = DRV_MODULE_NAME,
104 .proc_name = DRV_MODULE_NAME,
105 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
106 .queuecommand = iscsi_queuecommand,
107 .change_queue_depth = scsi_change_queue_depth,
108 .sg_tablesize = SG_ALL,
109 .max_sectors = 0xFFFF,
110 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
111 .eh_timed_out = iscsi_eh_cmd_timed_out,
112 .eh_abort_handler = iscsi_eh_abort,
113 .eh_device_reset_handler = iscsi_eh_device_reset,
114 .eh_target_reset_handler = iscsi_eh_recover_target,
115 .target_alloc = iscsi_target_alloc,
116 .dma_boundary = PAGE_SIZE - 1,
117 .this_id = -1,
118 .track_queue_depth = 1,
119 };
120
121 static struct iscsi_transport cxgb4i_iscsi_transport = {
122 .owner = THIS_MODULE,
123 .name = DRV_MODULE_NAME,
124 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
125 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
126 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
127 .attr_is_visible = cxgbi_attr_is_visible,
128 .get_host_param = cxgbi_get_host_param,
129 .set_host_param = cxgbi_set_host_param,
130 /* session management */
131 .create_session = cxgbi_create_session,
132 .destroy_session = cxgbi_destroy_session,
133 .get_session_param = iscsi_session_get_param,
134 /* connection management */
135 .create_conn = cxgbi_create_conn,
136 .bind_conn = cxgbi_bind_conn,
137 .destroy_conn = iscsi_tcp_conn_teardown,
138 .start_conn = iscsi_conn_start,
139 .stop_conn = iscsi_conn_stop,
140 .get_conn_param = iscsi_conn_get_param,
141 .set_param = cxgbi_set_conn_param,
142 .get_stats = cxgbi_get_conn_stats,
143 /* pdu xmit req from user space */
144 .send_pdu = iscsi_conn_send_pdu,
145 /* task */
146 .init_task = iscsi_tcp_task_init,
147 .xmit_task = iscsi_tcp_task_xmit,
148 .cleanup_task = cxgbi_cleanup_task,
149 /* pdu */
150 .alloc_pdu = cxgbi_conn_alloc_pdu,
151 .init_pdu = cxgbi_conn_init_pdu,
152 .xmit_pdu = cxgbi_conn_xmit_pdu,
153 .parse_pdu_itt = cxgbi_parse_pdu_itt,
154 /* TCP connect/disconnect */
155 .get_ep_param = cxgbi_get_ep_param,
156 .ep_connect = cxgbi_ep_connect,
157 .ep_poll = cxgbi_ep_poll,
158 .ep_disconnect = cxgbi_ep_disconnect,
159 /* Error recovery timeout call */
160 .session_recovery_timedout = iscsi_session_recovery_timedout,
161 };
162
163 #ifdef CONFIG_CHELSIO_T4_DCB
164 static int
165 cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *);
166
167 static struct notifier_block cxgb4_dcb_change = {
168 .notifier_call = cxgb4_dcb_change_notify,
169 };
170 #endif
171
172 static struct scsi_transport_template *cxgb4i_stt;
173
174 /*
175 * CPL (Chelsio Protocol Language) defines a message passing interface between
176 * the host driver and Chelsio asic.
177 * The section below implments CPLs that related to iscsi tcp connection
178 * open/close/abort and data send/receive.
179 */
180
181 #define RCV_BUFSIZ_MASK 0x3FFU
182 #define MAX_IMM_TX_PKT_LEN 256
183
184 static int push_tx_frames(struct cxgbi_sock *, int);
185
186 /*
187 * is_ofld_imm - check whether a packet can be sent as immediate data
188 * @skb: the packet
189 *
190 * Returns true if a packet can be sent as an offload WR with immediate
191 * data. We currently use the same limit as for Ethernet packets.
192 */
193 static inline bool is_ofld_imm(const struct sk_buff *skb)
194 {
195 int len = skb->len;
196
197 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
198 len += sizeof(struct fw_ofld_tx_data_wr);
199
200 return len <= MAX_IMM_TX_PKT_LEN;
201 }
202
203 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
204 struct l2t_entry *e)
205 {
206 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
207 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
208 unsigned long long opt0;
209 unsigned int opt2;
210 unsigned int qid_atid = ((unsigned int)csk->atid) |
211 (((unsigned int)csk->rss_qid) << 14);
212
213 opt0 = KEEP_ALIVE_F |
214 WND_SCALE_V(wscale) |
215 MSS_IDX_V(csk->mss_idx) |
216 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
217 TX_CHAN_V(csk->tx_chan) |
218 SMAC_SEL_V(csk->smac_idx) |
219 ULP_MODE_V(ULP_MODE_ISCSI) |
220 RCV_BUFSIZ_V(csk->rcv_win >> 10);
221
222 opt2 = RX_CHANNEL_V(0) |
223 RSS_QUEUE_VALID_F |
224 RSS_QUEUE_V(csk->rss_qid);
225
226 if (is_t4(lldi->adapter_type)) {
227 struct cpl_act_open_req *req =
228 (struct cpl_act_open_req *)skb->head;
229
230 INIT_TP_WR(req, 0);
231 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
232 qid_atid));
233 req->local_port = csk->saddr.sin_port;
234 req->peer_port = csk->daddr.sin_port;
235 req->local_ip = csk->saddr.sin_addr.s_addr;
236 req->peer_ip = csk->daddr.sin_addr.s_addr;
237 req->opt0 = cpu_to_be64(opt0);
238 req->params = cpu_to_be32(cxgb4_select_ntuple(
239 csk->cdev->ports[csk->port_id],
240 csk->l2t));
241 opt2 |= RX_FC_VALID_F;
242 req->opt2 = cpu_to_be32(opt2);
243
244 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
245 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
246 csk, &req->local_ip, ntohs(req->local_port),
247 &req->peer_ip, ntohs(req->peer_port),
248 csk->atid, csk->rss_qid);
249 } else if (is_t5(lldi->adapter_type)) {
250 struct cpl_t5_act_open_req *req =
251 (struct cpl_t5_act_open_req *)skb->head;
252 u32 isn = (prandom_u32() & ~7UL) - 1;
253
254 INIT_TP_WR(req, 0);
255 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
256 qid_atid));
257 req->local_port = csk->saddr.sin_port;
258 req->peer_port = csk->daddr.sin_port;
259 req->local_ip = csk->saddr.sin_addr.s_addr;
260 req->peer_ip = csk->daddr.sin_addr.s_addr;
261 req->opt0 = cpu_to_be64(opt0);
262 req->params = cpu_to_be64(FILTER_TUPLE_V(
263 cxgb4_select_ntuple(
264 csk->cdev->ports[csk->port_id],
265 csk->l2t)));
266 req->rsvd = cpu_to_be32(isn);
267 opt2 |= T5_ISS_VALID;
268 opt2 |= T5_OPT_2_VALID_F;
269
270 req->opt2 = cpu_to_be32(opt2);
271
272 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
273 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
274 csk, &req->local_ip, ntohs(req->local_port),
275 &req->peer_ip, ntohs(req->peer_port),
276 csk->atid, csk->rss_qid);
277 } else {
278 struct cpl_t6_act_open_req *req =
279 (struct cpl_t6_act_open_req *)skb->head;
280 u32 isn = (prandom_u32() & ~7UL) - 1;
281
282 INIT_TP_WR(req, 0);
283 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
284 qid_atid));
285 req->local_port = csk->saddr.sin_port;
286 req->peer_port = csk->daddr.sin_port;
287 req->local_ip = csk->saddr.sin_addr.s_addr;
288 req->peer_ip = csk->daddr.sin_addr.s_addr;
289 req->opt0 = cpu_to_be64(opt0);
290 req->params = cpu_to_be64(FILTER_TUPLE_V(
291 cxgb4_select_ntuple(
292 csk->cdev->ports[csk->port_id],
293 csk->l2t)));
294 req->rsvd = cpu_to_be32(isn);
295
296 opt2 |= T5_ISS_VALID;
297 opt2 |= RX_FC_DISABLE_F;
298 opt2 |= T5_OPT_2_VALID_F;
299
300 req->opt2 = cpu_to_be32(opt2);
301 req->rsvd2 = cpu_to_be32(0);
302 req->opt3 = cpu_to_be32(0);
303
304 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
305 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
306 csk, &req->local_ip, ntohs(req->local_port),
307 &req->peer_ip, ntohs(req->peer_port),
308 csk->atid, csk->rss_qid);
309 }
310
311 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
312
313 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
314 (&csk->saddr), (&csk->daddr),
315 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
316 csk->state, csk->flags, csk->atid, csk->rss_qid);
317
318 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
319 }
320
321 #if IS_ENABLED(CONFIG_IPV6)
322 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
323 struct l2t_entry *e)
324 {
325 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
326 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
327 unsigned long long opt0;
328 unsigned int opt2;
329 unsigned int qid_atid = ((unsigned int)csk->atid) |
330 (((unsigned int)csk->rss_qid) << 14);
331
332 opt0 = KEEP_ALIVE_F |
333 WND_SCALE_V(wscale) |
334 MSS_IDX_V(csk->mss_idx) |
335 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
336 TX_CHAN_V(csk->tx_chan) |
337 SMAC_SEL_V(csk->smac_idx) |
338 ULP_MODE_V(ULP_MODE_ISCSI) |
339 RCV_BUFSIZ_V(csk->rcv_win >> 10);
340
341 opt2 = RX_CHANNEL_V(0) |
342 RSS_QUEUE_VALID_F |
343 RSS_QUEUE_V(csk->rss_qid);
344
345 if (is_t4(lldi->adapter_type)) {
346 struct cpl_act_open_req6 *req =
347 (struct cpl_act_open_req6 *)skb->head;
348
349 INIT_TP_WR(req, 0);
350 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
351 qid_atid));
352 req->local_port = csk->saddr6.sin6_port;
353 req->peer_port = csk->daddr6.sin6_port;
354
355 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
356 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
357 8);
358 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
359 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
360 8);
361
362 req->opt0 = cpu_to_be64(opt0);
363
364 opt2 |= RX_FC_VALID_F;
365 req->opt2 = cpu_to_be32(opt2);
366
367 req->params = cpu_to_be32(cxgb4_select_ntuple(
368 csk->cdev->ports[csk->port_id],
369 csk->l2t));
370 } else if (is_t5(lldi->adapter_type)) {
371 struct cpl_t5_act_open_req6 *req =
372 (struct cpl_t5_act_open_req6 *)skb->head;
373
374 INIT_TP_WR(req, 0);
375 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
376 qid_atid));
377 req->local_port = csk->saddr6.sin6_port;
378 req->peer_port = csk->daddr6.sin6_port;
379 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
380 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
381 8);
382 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
383 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
384 8);
385 req->opt0 = cpu_to_be64(opt0);
386
387 opt2 |= T5_OPT_2_VALID_F;
388 req->opt2 = cpu_to_be32(opt2);
389
390 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
391 csk->cdev->ports[csk->port_id],
392 csk->l2t)));
393 } else {
394 struct cpl_t6_act_open_req6 *req =
395 (struct cpl_t6_act_open_req6 *)skb->head;
396
397 INIT_TP_WR(req, 0);
398 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
399 qid_atid));
400 req->local_port = csk->saddr6.sin6_port;
401 req->peer_port = csk->daddr6.sin6_port;
402 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
403 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
404 8);
405 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
406 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
407 8);
408 req->opt0 = cpu_to_be64(opt0);
409
410 opt2 |= RX_FC_DISABLE_F;
411 opt2 |= T5_OPT_2_VALID_F;
412
413 req->opt2 = cpu_to_be32(opt2);
414
415 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
416 csk->cdev->ports[csk->port_id],
417 csk->l2t)));
418
419 req->rsvd2 = cpu_to_be32(0);
420 req->opt3 = cpu_to_be32(0);
421 }
422
423 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
424
425 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
426 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
427 csk->flags, csk->atid,
428 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
429 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
430 csk->rss_qid);
431
432 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
433 }
434 #endif
435
436 static void send_close_req(struct cxgbi_sock *csk)
437 {
438 struct sk_buff *skb = csk->cpl_close;
439 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
440 unsigned int tid = csk->tid;
441
442 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
443 "csk 0x%p,%u,0x%lx, tid %u.\n",
444 csk, csk->state, csk->flags, csk->tid);
445 csk->cpl_close = NULL;
446 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
447 INIT_TP_WR(req, tid);
448 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
449 req->rsvd = 0;
450
451 cxgbi_sock_skb_entail(csk, skb);
452 if (csk->state >= CTP_ESTABLISHED)
453 push_tx_frames(csk, 1);
454 }
455
456 static void abort_arp_failure(void *handle, struct sk_buff *skb)
457 {
458 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
459 struct cpl_abort_req *req;
460
461 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
462 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
463 csk, csk->state, csk->flags, csk->tid);
464 req = (struct cpl_abort_req *)skb->data;
465 req->cmd = CPL_ABORT_NO_RST;
466 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
467 }
468
469 static void send_abort_req(struct cxgbi_sock *csk)
470 {
471 struct cpl_abort_req *req;
472 struct sk_buff *skb = csk->cpl_abort_req;
473
474 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
475 return;
476
477 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
478 send_tx_flowc_wr(csk);
479 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
480 }
481
482 cxgbi_sock_set_state(csk, CTP_ABORTING);
483 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
484 cxgbi_sock_purge_write_queue(csk);
485
486 csk->cpl_abort_req = NULL;
487 req = (struct cpl_abort_req *)skb->head;
488 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
489 req->cmd = CPL_ABORT_SEND_RST;
490 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
491 INIT_TP_WR(req, csk->tid);
492 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
493 req->rsvd0 = htonl(csk->snd_nxt);
494 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
495
496 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
497 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
498 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
499 req->rsvd1);
500
501 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
502 }
503
504 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
505 {
506 struct sk_buff *skb = csk->cpl_abort_rpl;
507 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
508
509 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
510 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
511 csk, csk->state, csk->flags, csk->tid, rst_status);
512
513 csk->cpl_abort_rpl = NULL;
514 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
515 INIT_TP_WR(rpl, csk->tid);
516 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
517 rpl->cmd = rst_status;
518 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
519 }
520
521 /*
522 * CPL connection rx data ack: host ->
523 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
524 * credits sent.
525 */
526 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
527 {
528 struct sk_buff *skb;
529 struct cpl_rx_data_ack *req;
530
531 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
532 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
533 csk, csk->state, csk->flags, csk->tid, credits);
534
535 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
536 if (!skb) {
537 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
538 return 0;
539 }
540 req = (struct cpl_rx_data_ack *)skb->head;
541
542 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
543 INIT_TP_WR(req, csk->tid);
544 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
545 csk->tid));
546 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
547 | RX_FORCE_ACK_F);
548 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
549 return credits;
550 }
551
552 /*
553 * sgl_len - calculates the size of an SGL of the given capacity
554 * @n: the number of SGL entries
555 * Calculates the number of flits needed for a scatter/gather list that
556 * can hold the given number of entries.
557 */
558 static inline unsigned int sgl_len(unsigned int n)
559 {
560 n--;
561 return (3 * n) / 2 + (n & 1) + 2;
562 }
563
564 /*
565 * calc_tx_flits_ofld - calculate # of flits for an offload packet
566 * @skb: the packet
567 *
568 * Returns the number of flits needed for the given offload packet.
569 * These packets are already fully constructed and no additional headers
570 * will be added.
571 */
572 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
573 {
574 unsigned int flits, cnt;
575
576 if (is_ofld_imm(skb))
577 return DIV_ROUND_UP(skb->len, 8);
578 flits = skb_transport_offset(skb) / 8;
579 cnt = skb_shinfo(skb)->nr_frags;
580 if (skb_tail_pointer(skb) != skb_transport_header(skb))
581 cnt++;
582 return flits + sgl_len(cnt);
583 }
584
585 #define FLOWC_WR_NPARAMS_MIN 9
586 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
587 {
588 int nparams, flowclen16, flowclen;
589
590 nparams = FLOWC_WR_NPARAMS_MIN;
591 #ifdef CONFIG_CHELSIO_T4_DCB
592 nparams++;
593 #endif
594 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
595 flowclen16 = DIV_ROUND_UP(flowclen, 16);
596 flowclen = flowclen16 * 16;
597 /*
598 * Return the number of 16-byte credits used by the FlowC request.
599 * Pass back the nparams and actual FlowC length if requested.
600 */
601 if (nparamsp)
602 *nparamsp = nparams;
603 if (flowclenp)
604 *flowclenp = flowclen;
605
606 return flowclen16;
607 }
608
609 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
610 {
611 struct sk_buff *skb;
612 struct fw_flowc_wr *flowc;
613 int nparams, flowclen16, flowclen;
614
615 #ifdef CONFIG_CHELSIO_T4_DCB
616 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
617 #endif
618 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
619 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
620 flowc = (struct fw_flowc_wr *)skb->head;
621 flowc->op_to_nparams =
622 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
623 flowc->flowid_len16 =
624 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
625 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
626 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
627 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
628 flowc->mnemval[1].val = htonl(csk->tx_chan);
629 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
630 flowc->mnemval[2].val = htonl(csk->tx_chan);
631 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
632 flowc->mnemval[3].val = htonl(csk->rss_qid);
633 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
634 flowc->mnemval[4].val = htonl(csk->snd_nxt);
635 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
636 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
637 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
638 flowc->mnemval[6].val = htonl(csk->snd_win);
639 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
640 flowc->mnemval[7].val = htonl(csk->advmss);
641 flowc->mnemval[8].mnemonic = 0;
642 flowc->mnemval[8].val = 0;
643 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
644 flowc->mnemval[8].val = 16384;
645 #ifdef CONFIG_CHELSIO_T4_DCB
646 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
647 if (vlan == CPL_L2T_VLAN_NONE) {
648 pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n",
649 csk->tid);
650 flowc->mnemval[9].val = cpu_to_be32(0);
651 } else {
652 flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >>
653 VLAN_PRIO_SHIFT);
654 }
655 #endif
656
657 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
658
659 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
660 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
661 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
662 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
663 csk->advmss);
664
665 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
666
667 return flowclen16;
668 }
669
670 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
671 int dlen, int len, u32 credits, int compl)
672 {
673 struct fw_ofld_tx_data_wr *req;
674 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
675 unsigned int wr_ulp_mode = 0, val;
676 bool imm = is_ofld_imm(skb);
677
678 req = __skb_push(skb, sizeof(*req));
679
680 if (imm) {
681 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
682 FW_WR_COMPL_F |
683 FW_WR_IMMDLEN_V(dlen));
684 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
685 FW_WR_LEN16_V(credits));
686 } else {
687 req->op_to_immdlen =
688 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
689 FW_WR_COMPL_F |
690 FW_WR_IMMDLEN_V(0));
691 req->flowid_len16 =
692 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
693 FW_WR_LEN16_V(credits));
694 }
695 if (submode)
696 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
697 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
698 val = skb_peek(&csk->write_queue) ? 0 : 1;
699 req->tunnel_to_proxy = htonl(wr_ulp_mode |
700 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
701 req->plen = htonl(len);
702 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
703 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
704 }
705
706 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
707 {
708 kfree_skb(skb);
709 }
710
711 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
712 {
713 int total_size = 0;
714 struct sk_buff *skb;
715
716 if (unlikely(csk->state < CTP_ESTABLISHED ||
717 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
718 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
719 1 << CXGBI_DBG_PDU_TX,
720 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
721 csk, csk->state, csk->flags, csk->tid);
722 return 0;
723 }
724
725 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
726 int dlen = skb->len;
727 int len = skb->len;
728 unsigned int credits_needed;
729 int flowclen16 = 0;
730
731 skb_reset_transport_header(skb);
732 if (is_ofld_imm(skb))
733 credits_needed = DIV_ROUND_UP(dlen, 16);
734 else
735 credits_needed = DIV_ROUND_UP(
736 8 * calc_tx_flits_ofld(skb),
737 16);
738
739 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
740 credits_needed += DIV_ROUND_UP(
741 sizeof(struct fw_ofld_tx_data_wr),
742 16);
743
744 /*
745 * Assumes the initial credits is large enough to support
746 * fw_flowc_wr plus largest possible first payload
747 */
748 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
749 flowclen16 = send_tx_flowc_wr(csk);
750 csk->wr_cred -= flowclen16;
751 csk->wr_una_cred += flowclen16;
752 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
753 }
754
755 if (csk->wr_cred < credits_needed) {
756 log_debug(1 << CXGBI_DBG_PDU_TX,
757 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
758 csk, skb->len, skb->data_len,
759 credits_needed, csk->wr_cred);
760 break;
761 }
762 __skb_unlink(skb, &csk->write_queue);
763 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
764 skb->csum = credits_needed + flowclen16;
765 csk->wr_cred -= credits_needed;
766 csk->wr_una_cred += credits_needed;
767 cxgbi_sock_enqueue_wr(csk, skb);
768
769 log_debug(1 << CXGBI_DBG_PDU_TX,
770 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
771 csk, skb->len, skb->data_len, credits_needed,
772 csk->wr_cred, csk->wr_una_cred);
773
774 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
775 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
776 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
777 req_completion);
778 csk->snd_nxt += len;
779 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
780 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
781 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
782 struct cpl_close_con_req *req =
783 (struct cpl_close_con_req *)skb->data;
784 req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
785 }
786 total_size += skb->truesize;
787 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
788
789 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
790 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
791 csk, csk->state, csk->flags, csk->tid, skb, len);
792
793 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
794 }
795 return total_size;
796 }
797
798 static inline void free_atid(struct cxgbi_sock *csk)
799 {
800 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
801
802 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
803 cxgb4_free_atid(lldi->tids, csk->atid);
804 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
805 cxgbi_sock_put(csk);
806 }
807 }
808
809 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
810 {
811 struct cxgbi_sock *csk;
812 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
813 unsigned short tcp_opt = ntohs(req->tcp_opt);
814 unsigned int tid = GET_TID(req);
815 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
816 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
817 struct tid_info *t = lldi->tids;
818 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
819
820 csk = lookup_atid(t, atid);
821 if (unlikely(!csk)) {
822 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
823 goto rel_skb;
824 }
825
826 if (csk->atid != atid) {
827 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
828 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
829 goto rel_skb;
830 }
831
832 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
833 (&csk->saddr), (&csk->daddr),
834 atid, tid, csk, csk->state, csk->flags, rcv_isn);
835
836 module_put(cdev->owner);
837
838 cxgbi_sock_get(csk);
839 csk->tid = tid;
840 cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);
841 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
842
843 free_atid(csk);
844
845 spin_lock_bh(&csk->lock);
846 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
847 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
848 csk, csk->state, csk->flags, csk->tid);
849
850 if (csk->retry_timer.function) {
851 del_timer(&csk->retry_timer);
852 csk->retry_timer.function = NULL;
853 }
854
855 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
856 /*
857 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
858 * pass through opt0.
859 */
860 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
861 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
862
863 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
864 if (TCPOPT_TSTAMP_G(tcp_opt))
865 csk->advmss -= 12;
866 if (csk->advmss < 128)
867 csk->advmss = 128;
868
869 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
870 "csk 0x%p, mss_idx %u, advmss %u.\n",
871 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
872
873 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
874
875 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
876 send_abort_req(csk);
877 else {
878 if (skb_queue_len(&csk->write_queue))
879 push_tx_frames(csk, 0);
880 cxgbi_conn_tx_open(csk);
881 }
882 spin_unlock_bh(&csk->lock);
883
884 rel_skb:
885 __kfree_skb(skb);
886 }
887
888 static int act_open_rpl_status_to_errno(int status)
889 {
890 switch (status) {
891 case CPL_ERR_CONN_RESET:
892 return -ECONNREFUSED;
893 case CPL_ERR_ARP_MISS:
894 return -EHOSTUNREACH;
895 case CPL_ERR_CONN_TIMEDOUT:
896 return -ETIMEDOUT;
897 case CPL_ERR_TCAM_FULL:
898 return -ENOMEM;
899 case CPL_ERR_CONN_EXIST:
900 return -EADDRINUSE;
901 default:
902 return -EIO;
903 }
904 }
905
906 static void csk_act_open_retry_timer(struct timer_list *t)
907 {
908 struct sk_buff *skb = NULL;
909 struct cxgbi_sock *csk = from_timer(csk, t, retry_timer);
910 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
911 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
912 struct l2t_entry *);
913 int t4 = is_t4(lldi->adapter_type), size, size6;
914
915 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
916 "csk 0x%p,%u,0x%lx,%u.\n",
917 csk, csk->state, csk->flags, csk->tid);
918
919 cxgbi_sock_get(csk);
920 spin_lock_bh(&csk->lock);
921
922 if (t4) {
923 size = sizeof(struct cpl_act_open_req);
924 size6 = sizeof(struct cpl_act_open_req6);
925 } else {
926 size = sizeof(struct cpl_t5_act_open_req);
927 size6 = sizeof(struct cpl_t5_act_open_req6);
928 }
929
930 if (csk->csk_family == AF_INET) {
931 send_act_open_func = send_act_open_req;
932 skb = alloc_wr(size, 0, GFP_ATOMIC);
933 #if IS_ENABLED(CONFIG_IPV6)
934 } else {
935 send_act_open_func = send_act_open_req6;
936 skb = alloc_wr(size6, 0, GFP_ATOMIC);
937 #endif
938 }
939
940 if (!skb)
941 cxgbi_sock_fail_act_open(csk, -ENOMEM);
942 else {
943 skb->sk = (struct sock *)csk;
944 t4_set_arp_err_handler(skb, csk,
945 cxgbi_sock_act_open_req_arp_failure);
946 send_act_open_func(csk, skb, csk->l2t);
947 }
948
949 spin_unlock_bh(&csk->lock);
950 cxgbi_sock_put(csk);
951
952 }
953
954 static inline bool is_neg_adv(unsigned int status)
955 {
956 return status == CPL_ERR_RTX_NEG_ADVICE ||
957 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
958 status == CPL_ERR_PERSIST_NEG_ADVICE;
959 }
960
961 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
962 {
963 struct cxgbi_sock *csk;
964 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
965 unsigned int tid = GET_TID(rpl);
966 unsigned int atid =
967 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
968 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
969 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
970 struct tid_info *t = lldi->tids;
971
972 csk = lookup_atid(t, atid);
973 if (unlikely(!csk)) {
974 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
975 goto rel_skb;
976 }
977
978 pr_info_ipaddr("tid %u/%u, status %u.\n"
979 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
980 atid, tid, status, csk, csk->state, csk->flags);
981
982 if (is_neg_adv(status))
983 goto rel_skb;
984
985 module_put(cdev->owner);
986
987 if (status && status != CPL_ERR_TCAM_FULL &&
988 status != CPL_ERR_CONN_EXIST &&
989 status != CPL_ERR_ARP_MISS)
990 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl),
991 csk->csk_family);
992
993 cxgbi_sock_get(csk);
994 spin_lock_bh(&csk->lock);
995
996 if (status == CPL_ERR_CONN_EXIST &&
997 csk->retry_timer.function != csk_act_open_retry_timer) {
998 csk->retry_timer.function = csk_act_open_retry_timer;
999 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
1000 } else
1001 cxgbi_sock_fail_act_open(csk,
1002 act_open_rpl_status_to_errno(status));
1003
1004 spin_unlock_bh(&csk->lock);
1005 cxgbi_sock_put(csk);
1006 rel_skb:
1007 __kfree_skb(skb);
1008 }
1009
1010 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
1011 {
1012 struct cxgbi_sock *csk;
1013 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
1014 unsigned int tid = GET_TID(req);
1015 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1016 struct tid_info *t = lldi->tids;
1017
1018 csk = lookup_tid(t, tid);
1019 if (unlikely(!csk)) {
1020 pr_err("can't find connection for tid %u.\n", tid);
1021 goto rel_skb;
1022 }
1023 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1024 (&csk->saddr), (&csk->daddr),
1025 csk, csk->state, csk->flags, csk->tid);
1026 cxgbi_sock_rcv_peer_close(csk);
1027 rel_skb:
1028 __kfree_skb(skb);
1029 }
1030
1031 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1032 {
1033 struct cxgbi_sock *csk;
1034 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1035 unsigned int tid = GET_TID(rpl);
1036 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1037 struct tid_info *t = lldi->tids;
1038
1039 csk = lookup_tid(t, tid);
1040 if (unlikely(!csk)) {
1041 pr_err("can't find connection for tid %u.\n", tid);
1042 goto rel_skb;
1043 }
1044 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1045 (&csk->saddr), (&csk->daddr),
1046 csk, csk->state, csk->flags, csk->tid);
1047 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1048 rel_skb:
1049 __kfree_skb(skb);
1050 }
1051
1052 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1053 int *need_rst)
1054 {
1055 switch (abort_reason) {
1056 case CPL_ERR_BAD_SYN: /* fall through */
1057 case CPL_ERR_CONN_RESET:
1058 return csk->state > CTP_ESTABLISHED ?
1059 -EPIPE : -ECONNRESET;
1060 case CPL_ERR_XMIT_TIMEDOUT:
1061 case CPL_ERR_PERSIST_TIMEDOUT:
1062 case CPL_ERR_FINWAIT2_TIMEDOUT:
1063 case CPL_ERR_KEEPALIVE_TIMEDOUT:
1064 return -ETIMEDOUT;
1065 default:
1066 return -EIO;
1067 }
1068 }
1069
1070 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1071 {
1072 struct cxgbi_sock *csk;
1073 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1074 unsigned int tid = GET_TID(req);
1075 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1076 struct tid_info *t = lldi->tids;
1077 int rst_status = CPL_ABORT_NO_RST;
1078
1079 csk = lookup_tid(t, tid);
1080 if (unlikely(!csk)) {
1081 pr_err("can't find connection for tid %u.\n", tid);
1082 goto rel_skb;
1083 }
1084
1085 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1086 (&csk->saddr), (&csk->daddr),
1087 csk, csk->state, csk->flags, csk->tid, req->status);
1088
1089 if (is_neg_adv(req->status))
1090 goto rel_skb;
1091
1092 cxgbi_sock_get(csk);
1093 spin_lock_bh(&csk->lock);
1094
1095 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1096
1097 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1098 send_tx_flowc_wr(csk);
1099 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1100 }
1101
1102 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1103 cxgbi_sock_set_state(csk, CTP_ABORTING);
1104
1105 send_abort_rpl(csk, rst_status);
1106
1107 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1108 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1109 cxgbi_sock_closed(csk);
1110 }
1111
1112 spin_unlock_bh(&csk->lock);
1113 cxgbi_sock_put(csk);
1114 rel_skb:
1115 __kfree_skb(skb);
1116 }
1117
1118 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1119 {
1120 struct cxgbi_sock *csk;
1121 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1122 unsigned int tid = GET_TID(rpl);
1123 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1124 struct tid_info *t = lldi->tids;
1125
1126 csk = lookup_tid(t, tid);
1127 if (!csk)
1128 goto rel_skb;
1129
1130 if (csk)
1131 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1132 (&csk->saddr), (&csk->daddr), csk,
1133 csk->state, csk->flags, csk->tid, rpl->status);
1134
1135 if (rpl->status == CPL_ERR_ABORT_FAILED)
1136 goto rel_skb;
1137
1138 cxgbi_sock_rcv_abort_rpl(csk);
1139 rel_skb:
1140 __kfree_skb(skb);
1141 }
1142
1143 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1144 {
1145 struct cxgbi_sock *csk;
1146 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1147 unsigned int tid = GET_TID(cpl);
1148 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1149 struct tid_info *t = lldi->tids;
1150
1151 csk = lookup_tid(t, tid);
1152 if (!csk) {
1153 pr_err("can't find connection for tid %u.\n", tid);
1154 } else {
1155 /* not expecting this, reset the connection. */
1156 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1157 spin_lock_bh(&csk->lock);
1158 send_abort_req(csk);
1159 spin_unlock_bh(&csk->lock);
1160 }
1161 __kfree_skb(skb);
1162 }
1163
1164 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1165 {
1166 struct cxgbi_sock *csk;
1167 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1168 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1169 unsigned int tid = GET_TID(cpl);
1170 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1171 struct tid_info *t = lldi->tids;
1172
1173 csk = lookup_tid(t, tid);
1174 if (unlikely(!csk)) {
1175 pr_err("can't find conn. for tid %u.\n", tid);
1176 goto rel_skb;
1177 }
1178
1179 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1180 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1181 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1182 pdu_len_ddp);
1183
1184 spin_lock_bh(&csk->lock);
1185
1186 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1187 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1188 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1189 csk, csk->state, csk->flags, csk->tid);
1190 if (csk->state != CTP_ABORTING)
1191 goto abort_conn;
1192 else
1193 goto discard;
1194 }
1195
1196 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1197 cxgbi_skcb_flags(skb) = 0;
1198
1199 skb_reset_transport_header(skb);
1200 __skb_pull(skb, sizeof(*cpl));
1201 __pskb_trim(skb, ntohs(cpl->len));
1202
1203 if (!csk->skb_ulp_lhdr) {
1204 unsigned char *bhs;
1205 unsigned int hlen, dlen, plen;
1206
1207 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1208 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1209 csk, csk->state, csk->flags, csk->tid, skb);
1210 csk->skb_ulp_lhdr = skb;
1211 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1212
1213 if ((CHELSIO_CHIP_VERSION(lldi->adapter_type) <= CHELSIO_T5) &&
1214 (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt)) {
1215 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1216 csk->tid, cxgbi_skcb_tcp_seq(skb),
1217 csk->rcv_nxt);
1218 goto abort_conn;
1219 }
1220
1221 bhs = skb->data;
1222 hlen = ntohs(cpl->len);
1223 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1224
1225 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1226 if (is_t4(lldi->adapter_type))
1227 plen -= 40;
1228
1229 if ((hlen + dlen) != plen) {
1230 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1231 "mismatch %u != %u + %u, seq 0x%x.\n",
1232 csk->tid, plen, hlen, dlen,
1233 cxgbi_skcb_tcp_seq(skb));
1234 goto abort_conn;
1235 }
1236
1237 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1238 if (dlen)
1239 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1240 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1241
1242 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1243 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1244 csk, skb, *bhs, hlen, dlen,
1245 ntohl(*((unsigned int *)(bhs + 16))),
1246 ntohl(*((unsigned int *)(bhs + 24))));
1247
1248 } else {
1249 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1250
1251 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1252 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1253 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1254 csk, csk->state, csk->flags, skb, lskb);
1255 }
1256
1257 __skb_queue_tail(&csk->receive_queue, skb);
1258 spin_unlock_bh(&csk->lock);
1259 return;
1260
1261 abort_conn:
1262 send_abort_req(csk);
1263 discard:
1264 spin_unlock_bh(&csk->lock);
1265 rel_skb:
1266 __kfree_skb(skb);
1267 }
1268
1269 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1270 {
1271 struct cxgbi_sock *csk;
1272 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1273 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1274 struct tid_info *t = lldi->tids;
1275 struct sk_buff *lskb;
1276 u32 tid = GET_TID(cpl);
1277 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1278
1279 csk = lookup_tid(t, tid);
1280 if (unlikely(!csk)) {
1281 pr_err("can't find conn. for tid %u.\n", tid);
1282 goto rel_skb;
1283 }
1284
1285 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1286 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1287 csk, csk->state, csk->flags, csk->tid, skb,
1288 skb->len, pdu_len_ddp);
1289
1290 spin_lock_bh(&csk->lock);
1291
1292 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1293 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1294 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1295 csk, csk->state, csk->flags, csk->tid);
1296
1297 if (csk->state != CTP_ABORTING)
1298 goto abort_conn;
1299 else
1300 goto discard;
1301 }
1302
1303 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1304 cxgbi_skcb_flags(skb) = 0;
1305
1306 skb_reset_transport_header(skb);
1307 __skb_pull(skb, sizeof(*cpl));
1308 __pskb_trim(skb, ntohs(cpl->len));
1309
1310 if (!csk->skb_ulp_lhdr)
1311 csk->skb_ulp_lhdr = skb;
1312
1313 lskb = csk->skb_ulp_lhdr;
1314 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1315
1316 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1317 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1318 csk, csk->state, csk->flags, skb, lskb);
1319
1320 __skb_queue_tail(&csk->receive_queue, skb);
1321 spin_unlock_bh(&csk->lock);
1322 return;
1323
1324 abort_conn:
1325 send_abort_req(csk);
1326 discard:
1327 spin_unlock_bh(&csk->lock);
1328 rel_skb:
1329 __kfree_skb(skb);
1330 }
1331
1332 static void
1333 cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1334 struct sk_buff *skb, u32 ddpvld)
1335 {
1336 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1337 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1338 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1339 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1340 }
1341
1342 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1343 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1344 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1345 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1346 }
1347
1348 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1349 log_debug(1 << CXGBI_DBG_PDU_RX,
1350 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1351 csk, skb, ddpvld);
1352 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1353 }
1354
1355 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1356 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1357 log_debug(1 << CXGBI_DBG_PDU_RX,
1358 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1359 csk, skb, ddpvld);
1360 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1361 }
1362 }
1363
1364 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1365 struct sk_buff *skb)
1366 {
1367 struct cxgbi_sock *csk;
1368 struct sk_buff *lskb;
1369 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1370 unsigned int tid = GET_TID(rpl);
1371 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1372 struct tid_info *t = lldi->tids;
1373 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1374
1375 csk = lookup_tid(t, tid);
1376 if (unlikely(!csk)) {
1377 pr_err("can't find connection for tid %u.\n", tid);
1378 goto rel_skb;
1379 }
1380
1381 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1382 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1383 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1384
1385 spin_lock_bh(&csk->lock);
1386
1387 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1388 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1389 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1390 csk, csk->state, csk->flags, csk->tid);
1391 if (csk->state != CTP_ABORTING)
1392 goto abort_conn;
1393 else
1394 goto discard;
1395 }
1396
1397 if (!csk->skb_ulp_lhdr) {
1398 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1399 goto abort_conn;
1400 }
1401
1402 lskb = csk->skb_ulp_lhdr;
1403 csk->skb_ulp_lhdr = NULL;
1404
1405 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1406
1407 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1408 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1409 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1410
1411 cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1412
1413 log_debug(1 << CXGBI_DBG_PDU_RX,
1414 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1415 csk, lskb, cxgbi_skcb_flags(lskb));
1416
1417 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1418 cxgbi_conn_pdu_ready(csk);
1419 spin_unlock_bh(&csk->lock);
1420 goto rel_skb;
1421
1422 abort_conn:
1423 send_abort_req(csk);
1424 discard:
1425 spin_unlock_bh(&csk->lock);
1426 rel_skb:
1427 __kfree_skb(skb);
1428 }
1429
1430 static void
1431 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1432 {
1433 struct cxgbi_sock *csk;
1434 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1435 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1436 struct tid_info *t = lldi->tids;
1437 struct sk_buff *data_skb = NULL;
1438 u32 tid = GET_TID(rpl);
1439 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1440 u32 seq = be32_to_cpu(rpl->seq);
1441 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1442
1443 csk = lookup_tid(t, tid);
1444 if (unlikely(!csk)) {
1445 pr_err("can't find connection for tid %u.\n", tid);
1446 goto rel_skb;
1447 }
1448
1449 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1450 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1451 "pdu_len_ddp %u, status %u.\n",
1452 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1453 ntohs(rpl->len), pdu_len_ddp, rpl->status);
1454
1455 spin_lock_bh(&csk->lock);
1456
1457 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1458 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1459 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1460 csk, csk->state, csk->flags, csk->tid);
1461
1462 if (csk->state != CTP_ABORTING)
1463 goto abort_conn;
1464 else
1465 goto discard;
1466 }
1467
1468 cxgbi_skcb_tcp_seq(skb) = seq;
1469 cxgbi_skcb_flags(skb) = 0;
1470 cxgbi_skcb_rx_pdulen(skb) = 0;
1471
1472 skb_reset_transport_header(skb);
1473 __skb_pull(skb, sizeof(*rpl));
1474 __pskb_trim(skb, be16_to_cpu(rpl->len));
1475
1476 csk->rcv_nxt = seq + pdu_len_ddp;
1477
1478 if (csk->skb_ulp_lhdr) {
1479 data_skb = skb_peek(&csk->receive_queue);
1480 if (!data_skb ||
1481 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1482 pr_err("Error! freelist data not found 0x%p, tid %u\n",
1483 data_skb, tid);
1484
1485 goto abort_conn;
1486 }
1487 __skb_unlink(data_skb, &csk->receive_queue);
1488
1489 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1490
1491 __skb_queue_tail(&csk->receive_queue, skb);
1492 __skb_queue_tail(&csk->receive_queue, data_skb);
1493 } else {
1494 __skb_queue_tail(&csk->receive_queue, skb);
1495 }
1496
1497 csk->skb_ulp_lhdr = NULL;
1498
1499 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1500 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1501 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1502 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1503
1504 cxgb4i_process_ddpvld(csk, skb, ddpvld);
1505
1506 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1507 csk, skb, cxgbi_skcb_flags(skb));
1508
1509 cxgbi_conn_pdu_ready(csk);
1510 spin_unlock_bh(&csk->lock);
1511
1512 return;
1513
1514 abort_conn:
1515 send_abort_req(csk);
1516 discard:
1517 spin_unlock_bh(&csk->lock);
1518 rel_skb:
1519 __kfree_skb(skb);
1520 }
1521
1522 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1523 {
1524 struct cxgbi_sock *csk;
1525 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1526 unsigned int tid = GET_TID(rpl);
1527 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1528 struct tid_info *t = lldi->tids;
1529
1530 csk = lookup_tid(t, tid);
1531 if (unlikely(!csk))
1532 pr_err("can't find connection for tid %u.\n", tid);
1533 else {
1534 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1535 "csk 0x%p,%u,0x%lx,%u.\n",
1536 csk, csk->state, csk->flags, csk->tid);
1537 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1538 rpl->seq_vld);
1539 }
1540 __kfree_skb(skb);
1541 }
1542
1543 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1544 {
1545 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1546 unsigned int tid = GET_TID(rpl);
1547 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1548 struct tid_info *t = lldi->tids;
1549 struct cxgbi_sock *csk;
1550
1551 csk = lookup_tid(t, tid);
1552 if (!csk) {
1553 pr_err("can't find conn. for tid %u.\n", tid);
1554 return;
1555 }
1556
1557 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1558 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1559 csk, csk->state, csk->flags, csk->tid, rpl->status);
1560
1561 if (rpl->status != CPL_ERR_NONE) {
1562 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1563 csk, tid, rpl->status);
1564 csk->err = -EINVAL;
1565 }
1566
1567 complete(&csk->cmpl);
1568
1569 __kfree_skb(skb);
1570 }
1571
1572 static int alloc_cpls(struct cxgbi_sock *csk)
1573 {
1574 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1575 0, GFP_KERNEL);
1576 if (!csk->cpl_close)
1577 return -ENOMEM;
1578
1579 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1580 0, GFP_KERNEL);
1581 if (!csk->cpl_abort_req)
1582 goto free_cpls;
1583
1584 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1585 0, GFP_KERNEL);
1586 if (!csk->cpl_abort_rpl)
1587 goto free_cpls;
1588 return 0;
1589
1590 free_cpls:
1591 cxgbi_sock_free_cpl_skbs(csk);
1592 return -ENOMEM;
1593 }
1594
1595 static inline void l2t_put(struct cxgbi_sock *csk)
1596 {
1597 if (csk->l2t) {
1598 cxgb4_l2t_release(csk->l2t);
1599 csk->l2t = NULL;
1600 cxgbi_sock_put(csk);
1601 }
1602 }
1603
1604 static void release_offload_resources(struct cxgbi_sock *csk)
1605 {
1606 struct cxgb4_lld_info *lldi;
1607 #if IS_ENABLED(CONFIG_IPV6)
1608 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1609 #endif
1610
1611 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1612 "csk 0x%p,%u,0x%lx,%u.\n",
1613 csk, csk->state, csk->flags, csk->tid);
1614
1615 cxgbi_sock_free_cpl_skbs(csk);
1616 cxgbi_sock_purge_write_queue(csk);
1617 if (csk->wr_cred != csk->wr_max_cred) {
1618 cxgbi_sock_purge_wr_queue(csk);
1619 cxgbi_sock_reset_wr_list(csk);
1620 }
1621
1622 l2t_put(csk);
1623 #if IS_ENABLED(CONFIG_IPV6)
1624 if (csk->csk_family == AF_INET6)
1625 cxgb4_clip_release(ndev,
1626 (const u32 *)&csk->saddr6.sin6_addr, 1);
1627 #endif
1628
1629 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1630 free_atid(csk);
1631 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1632 lldi = cxgbi_cdev_priv(csk->cdev);
1633 cxgb4_remove_tid(lldi->tids, 0, csk->tid,
1634 csk->csk_family);
1635 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1636 cxgbi_sock_put(csk);
1637 }
1638 csk->dst = NULL;
1639 }
1640
1641 #ifdef CONFIG_CHELSIO_T4_DCB
1642 static inline u8 get_iscsi_dcb_state(struct net_device *ndev)
1643 {
1644 return ndev->dcbnl_ops->getstate(ndev);
1645 }
1646
1647 static int select_priority(int pri_mask)
1648 {
1649 if (!pri_mask)
1650 return 0;
1651 return (ffs(pri_mask) - 1);
1652 }
1653
1654 static u8 get_iscsi_dcb_priority(struct net_device *ndev)
1655 {
1656 int rv;
1657 u8 caps;
1658
1659 struct dcb_app iscsi_dcb_app = {
1660 .protocol = 3260
1661 };
1662
1663 rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
1664 if (rv)
1665 return 0;
1666
1667 if (caps & DCB_CAP_DCBX_VER_IEEE) {
1668 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
1669 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
1670 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
1671 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
1672 rv = dcb_getapp(ndev, &iscsi_dcb_app);
1673 }
1674
1675 log_debug(1 << CXGBI_DBG_ISCSI,
1676 "iSCSI priority is set to %u\n", select_priority(rv));
1677 return select_priority(rv);
1678 }
1679 #endif
1680
1681 static int init_act_open(struct cxgbi_sock *csk)
1682 {
1683 struct cxgbi_device *cdev = csk->cdev;
1684 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1685 struct net_device *ndev = cdev->ports[csk->port_id];
1686 struct sk_buff *skb = NULL;
1687 struct neighbour *n = NULL;
1688 void *daddr;
1689 unsigned int step;
1690 unsigned int rxq_idx;
1691 unsigned int size, size6;
1692 unsigned int linkspeed;
1693 unsigned int rcv_winf, snd_winf;
1694 #ifdef CONFIG_CHELSIO_T4_DCB
1695 u8 priority = 0;
1696 #endif
1697 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1698 "csk 0x%p,%u,0x%lx,%u.\n",
1699 csk, csk->state, csk->flags, csk->tid);
1700
1701 if (csk->csk_family == AF_INET)
1702 daddr = &csk->daddr.sin_addr.s_addr;
1703 #if IS_ENABLED(CONFIG_IPV6)
1704 else if (csk->csk_family == AF_INET6)
1705 daddr = &csk->daddr6.sin6_addr;
1706 #endif
1707 else {
1708 pr_err("address family 0x%x not supported\n", csk->csk_family);
1709 goto rel_resource;
1710 }
1711
1712 n = dst_neigh_lookup(csk->dst, daddr);
1713
1714 if (!n) {
1715 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1716 goto rel_resource;
1717 }
1718
1719 if (!(n->nud_state & NUD_VALID))
1720 neigh_event_send(n, NULL);
1721
1722 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1723 if (csk->atid < 0) {
1724 pr_err("%s, NO atid available.\n", ndev->name);
1725 goto rel_resource_without_clip;
1726 }
1727 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1728 cxgbi_sock_get(csk);
1729
1730 #ifdef CONFIG_CHELSIO_T4_DCB
1731 if (get_iscsi_dcb_state(ndev))
1732 priority = get_iscsi_dcb_priority(ndev);
1733
1734 csk->dcb_priority = priority;
1735 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority);
1736 #else
1737 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1738 #endif
1739 if (!csk->l2t) {
1740 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1741 goto rel_resource_without_clip;
1742 }
1743 cxgbi_sock_get(csk);
1744
1745 #if IS_ENABLED(CONFIG_IPV6)
1746 if (csk->csk_family == AF_INET6)
1747 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1748 #endif
1749
1750 if (is_t4(lldi->adapter_type)) {
1751 size = sizeof(struct cpl_act_open_req);
1752 size6 = sizeof(struct cpl_act_open_req6);
1753 } else if (is_t5(lldi->adapter_type)) {
1754 size = sizeof(struct cpl_t5_act_open_req);
1755 size6 = sizeof(struct cpl_t5_act_open_req6);
1756 } else {
1757 size = sizeof(struct cpl_t6_act_open_req);
1758 size6 = sizeof(struct cpl_t6_act_open_req6);
1759 }
1760
1761 if (csk->csk_family == AF_INET)
1762 skb = alloc_wr(size, 0, GFP_NOIO);
1763 #if IS_ENABLED(CONFIG_IPV6)
1764 else
1765 skb = alloc_wr(size6, 0, GFP_NOIO);
1766 #endif
1767
1768 if (!skb)
1769 goto rel_resource;
1770 skb->sk = (struct sock *)csk;
1771 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1772
1773 if (!csk->mtu)
1774 csk->mtu = dst_mtu(csk->dst);
1775 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1776 csk->tx_chan = cxgb4_port_chan(ndev);
1777 csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
1778 step = lldi->ntxq / lldi->nchan;
1779 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1780 step = lldi->nrxq / lldi->nchan;
1781 rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);
1782 cdev->rxq_idx_cntr++;
1783 csk->rss_qid = lldi->rxq_ids[rxq_idx];
1784 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1785 csk->snd_win = cxgb4i_snd_win;
1786 csk->rcv_win = cxgb4i_rcv_win;
1787 if (cxgb4i_rcv_win <= 0) {
1788 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1789 rcv_winf = linkspeed / SPEED_10000;
1790 if (rcv_winf)
1791 csk->rcv_win *= rcv_winf;
1792 }
1793 if (cxgb4i_snd_win <= 0) {
1794 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1795 snd_winf = linkspeed / SPEED_10000;
1796 if (snd_winf)
1797 csk->snd_win *= snd_winf;
1798 }
1799 csk->wr_cred = lldi->wr_cred -
1800 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1801 csk->wr_max_cred = csk->wr_cred;
1802 csk->wr_una_cred = 0;
1803 cxgbi_sock_reset_wr_list(csk);
1804 csk->err = 0;
1805
1806 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1807 (&csk->saddr), (&csk->daddr), csk, csk->state,
1808 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1809 csk->mtu, csk->mss_idx, csk->smac_idx);
1810
1811 /* must wait for either a act_open_rpl or act_open_establish */
1812 if (!try_module_get(cdev->owner)) {
1813 pr_err("%s, try_module_get failed.\n", ndev->name);
1814 goto rel_resource;
1815 }
1816
1817 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1818 if (csk->csk_family == AF_INET)
1819 send_act_open_req(csk, skb, csk->l2t);
1820 #if IS_ENABLED(CONFIG_IPV6)
1821 else
1822 send_act_open_req6(csk, skb, csk->l2t);
1823 #endif
1824 neigh_release(n);
1825
1826 return 0;
1827
1828 rel_resource:
1829 #if IS_ENABLED(CONFIG_IPV6)
1830 if (csk->csk_family == AF_INET6)
1831 cxgb4_clip_release(ndev,
1832 (const u32 *)&csk->saddr6.sin6_addr, 1);
1833 #endif
1834 rel_resource_without_clip:
1835 if (n)
1836 neigh_release(n);
1837 if (skb)
1838 __kfree_skb(skb);
1839 return -EINVAL;
1840 }
1841
1842 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1843 [CPL_ACT_ESTABLISH] = do_act_establish,
1844 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1845 [CPL_PEER_CLOSE] = do_peer_close,
1846 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1847 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1848 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1849 [CPL_FW4_ACK] = do_fw4_ack,
1850 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1851 [CPL_ISCSI_DATA] = do_rx_iscsi_data,
1852 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1853 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1854 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1855 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
1856 [CPL_RX_DATA] = do_rx_data,
1857 };
1858
1859 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1860 {
1861 int rc;
1862
1863 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1864 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1865
1866 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1867 cxgb4i_max_connect);
1868 if (rc < 0)
1869 return rc;
1870
1871 cdev->csk_release_offload_resources = release_offload_resources;
1872 cdev->csk_push_tx_frames = push_tx_frames;
1873 cdev->csk_send_abort_req = send_abort_req;
1874 cdev->csk_send_close_req = send_close_req;
1875 cdev->csk_send_rx_credits = send_rx_credits;
1876 cdev->csk_alloc_cpls = alloc_cpls;
1877 cdev->csk_init_act_open = init_act_open;
1878
1879 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1880 return 0;
1881 }
1882
1883 static inline void
1884 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1885 struct ulp_mem_io *req,
1886 unsigned int wr_len, unsigned int dlen,
1887 unsigned int pm_addr,
1888 int tid)
1889 {
1890 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1891 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1892
1893 INIT_ULPTX_WR(req, wr_len, 0, tid);
1894 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1895 FW_WR_ATOMIC_V(0));
1896 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1897 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1898 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1899 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1900 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1901 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1902
1903 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1904 idata->len = htonl(dlen);
1905 }
1906
1907 static struct sk_buff *
1908 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1909 struct cxgbi_ppm *ppm,
1910 unsigned int idx, unsigned int npods,
1911 unsigned int tid)
1912 {
1913 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1914 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1915 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1916 sizeof(struct ulptx_idata) + dlen, 16);
1917 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1918
1919 if (!skb) {
1920 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1921 __func__, ppm->ndev->name, idx, npods);
1922 return NULL;
1923 }
1924
1925 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1926 pm_addr, tid);
1927
1928 return skb;
1929 }
1930
1931 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1932 struct cxgbi_task_tag_info *ttinfo,
1933 unsigned int idx, unsigned int npods,
1934 struct scatterlist **sg_pp,
1935 unsigned int *sg_off)
1936 {
1937 struct cxgbi_device *cdev = csk->cdev;
1938 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1939 csk->tid);
1940 struct ulp_mem_io *req;
1941 struct ulptx_idata *idata;
1942 struct cxgbi_pagepod *ppod;
1943 int i;
1944
1945 if (!skb)
1946 return -ENOMEM;
1947
1948 req = (struct ulp_mem_io *)skb->head;
1949 idata = (struct ulptx_idata *)(req + 1);
1950 ppod = (struct cxgbi_pagepod *)(idata + 1);
1951
1952 for (i = 0; i < npods; i++, ppod++)
1953 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1954
1955 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1956 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1957 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1958
1959 spin_lock_bh(&csk->lock);
1960 cxgbi_sock_skb_entail(csk, skb);
1961 spin_unlock_bh(&csk->lock);
1962
1963 return 0;
1964 }
1965
1966 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1967 struct cxgbi_task_tag_info *ttinfo)
1968 {
1969 unsigned int pidx = ttinfo->idx;
1970 unsigned int npods = ttinfo->npods;
1971 unsigned int i, cnt;
1972 int err = 0;
1973 struct scatterlist *sg = ttinfo->sgl;
1974 unsigned int offset = 0;
1975
1976 ttinfo->cid = csk->port_id;
1977
1978 for (i = 0; i < npods; i += cnt, pidx += cnt) {
1979 cnt = npods - i;
1980
1981 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1982 cnt = ULPMEM_IDATA_MAX_NPPODS;
1983 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1984 &sg, &offset);
1985 if (err < 0)
1986 break;
1987 }
1988
1989 return err;
1990 }
1991
1992 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1993 int pg_idx)
1994 {
1995 struct sk_buff *skb;
1996 struct cpl_set_tcb_field *req;
1997
1998 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1999 return 0;
2000
2001 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2002 if (!skb)
2003 return -ENOMEM;
2004
2005 /* set up ulp page size */
2006 req = (struct cpl_set_tcb_field *)skb->head;
2007 INIT_TP_WR(req, csk->tid);
2008 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
2009 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
2010 req->word_cookie = htons(0);
2011 req->mask = cpu_to_be64(0x3 << 8);
2012 req->val = cpu_to_be64(pg_idx << 8);
2013 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2014
2015 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2016 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
2017
2018 reinit_completion(&csk->cmpl);
2019 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2020 wait_for_completion(&csk->cmpl);
2021
2022 return csk->err;
2023 }
2024
2025 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
2026 int hcrc, int dcrc)
2027 {
2028 struct sk_buff *skb;
2029 struct cpl_set_tcb_field *req;
2030
2031 if (!hcrc && !dcrc)
2032 return 0;
2033
2034 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2035 if (!skb)
2036 return -ENOMEM;
2037
2038 csk->hcrc_len = (hcrc ? 4 : 0);
2039 csk->dcrc_len = (dcrc ? 4 : 0);
2040 /* set up ulp submode */
2041 req = (struct cpl_set_tcb_field *)skb->head;
2042 INIT_TP_WR(req, tid);
2043 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
2044 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
2045 req->word_cookie = htons(0);
2046 req->mask = cpu_to_be64(0x3 << 4);
2047 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
2048 (dcrc ? ULP_CRC_DATA : 0)) << 4);
2049 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2050
2051 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2052 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
2053
2054 reinit_completion(&csk->cmpl);
2055 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2056 wait_for_completion(&csk->cmpl);
2057
2058 return csk->err;
2059 }
2060
2061 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
2062 {
2063 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
2064 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
2065 }
2066
2067 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
2068 {
2069 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
2070 struct net_device *ndev = cdev->ports[0];
2071 struct cxgbi_tag_format tformat;
2072 unsigned int ppmax;
2073 int i;
2074
2075 if (!lldi->vr->iscsi.size) {
2076 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
2077 return -EACCES;
2078 }
2079
2080 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
2081 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
2082
2083 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
2084 for (i = 0; i < 4; i++)
2085 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
2086 & 0xF;
2087 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
2088
2089 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
2090 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
2091
2092 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
2093 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
2094 cdev->csk_ddp_set_map = ddp_set_map;
2095 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2096 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2097 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2098 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2099 cdev->cdev2ppm = cdev2ppm;
2100
2101 return 0;
2102 }
2103
2104 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2105 {
2106 struct cxgbi_device *cdev;
2107 struct port_info *pi;
2108 int i, rc;
2109
2110 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2111 if (!cdev) {
2112 pr_info("t4 device 0x%p, register failed.\n", lldi);
2113 return NULL;
2114 }
2115 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2116 cdev, lldi->adapter_type, lldi->nports,
2117 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2118 lldi->nrxq, lldi->wr_cred);
2119 for (i = 0; i < lldi->nrxq; i++)
2120 log_debug(1 << CXGBI_DBG_DEV,
2121 "t4 0x%p, rxq id #%d: %u.\n",
2122 cdev, i, lldi->rxq_ids[i]);
2123
2124 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2125 cdev->flags = CXGBI_FLAG_DEV_T4;
2126 cdev->pdev = lldi->pdev;
2127 cdev->ports = lldi->ports;
2128 cdev->nports = lldi->nports;
2129 cdev->mtus = lldi->mtus;
2130 cdev->nmtus = NMTUS;
2131 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2132 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2133 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2134 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2135 cdev->itp = &cxgb4i_iscsi_transport;
2136 cdev->owner = THIS_MODULE;
2137
2138 cdev->pfvf = FW_PFVF_CMD_PFN_V(lldi->pf);
2139 pr_info("cdev 0x%p,%s, pfvf %u.\n",
2140 cdev, lldi->ports[0]->name, cdev->pfvf);
2141
2142 rc = cxgb4i_ddp_init(cdev);
2143 if (rc) {
2144 pr_info("t4 0x%p ddp init failed.\n", cdev);
2145 goto err_out;
2146 }
2147 rc = cxgb4i_ofld_init(cdev);
2148 if (rc) {
2149 pr_info("t4 0x%p ofld init failed.\n", cdev);
2150 goto err_out;
2151 }
2152
2153 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
2154 &cxgb4i_host_template, cxgb4i_stt);
2155 if (rc)
2156 goto err_out;
2157
2158 for (i = 0; i < cdev->nports; i++) {
2159 pi = netdev_priv(lldi->ports[i]);
2160 cdev->hbas[i]->port_id = pi->port_id;
2161 }
2162 return cdev;
2163
2164 err_out:
2165 cxgbi_device_unregister(cdev);
2166 return ERR_PTR(-ENOMEM);
2167 }
2168
2169 #define RX_PULL_LEN 128
2170 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2171 const struct pkt_gl *pgl)
2172 {
2173 const struct cpl_act_establish *rpl;
2174 struct sk_buff *skb;
2175 unsigned int opc;
2176 struct cxgbi_device *cdev = handle;
2177
2178 if (pgl == NULL) {
2179 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2180
2181 skb = alloc_wr(len, 0, GFP_ATOMIC);
2182 if (!skb)
2183 goto nomem;
2184 skb_copy_to_linear_data(skb, &rsp[1], len);
2185 } else {
2186 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2187 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2188 pgl->va, be64_to_cpu(*rsp),
2189 be64_to_cpu(*(u64 *)pgl->va),
2190 pgl->tot_len);
2191 return 0;
2192 }
2193 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2194 if (unlikely(!skb))
2195 goto nomem;
2196 }
2197
2198 rpl = (struct cpl_act_establish *)skb->data;
2199 opc = rpl->ot.opcode;
2200 log_debug(1 << CXGBI_DBG_TOE,
2201 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2202 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2203 if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {
2204 pr_err("No handler for opcode 0x%x.\n", opc);
2205 __kfree_skb(skb);
2206 } else
2207 cxgb4i_cplhandlers[opc](cdev, skb);
2208
2209 return 0;
2210 nomem:
2211 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2212 return 1;
2213 }
2214
2215 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2216 {
2217 struct cxgbi_device *cdev = handle;
2218
2219 switch (state) {
2220 case CXGB4_STATE_UP:
2221 pr_info("cdev 0x%p, UP.\n", cdev);
2222 break;
2223 case CXGB4_STATE_START_RECOVERY:
2224 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2225 /* close all connections */
2226 break;
2227 case CXGB4_STATE_DOWN:
2228 pr_info("cdev 0x%p, DOWN.\n", cdev);
2229 break;
2230 case CXGB4_STATE_DETACH:
2231 pr_info("cdev 0x%p, DETACH.\n", cdev);
2232 cxgbi_device_unregister(cdev);
2233 break;
2234 default:
2235 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2236 break;
2237 }
2238 return 0;
2239 }
2240
2241 #ifdef CONFIG_CHELSIO_T4_DCB
2242 static int
2243 cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val,
2244 void *data)
2245 {
2246 int i, port = 0xFF;
2247 struct net_device *ndev;
2248 struct cxgbi_device *cdev = NULL;
2249 struct dcb_app_type *iscsi_app = data;
2250 struct cxgbi_ports_map *pmap;
2251 u8 priority;
2252
2253 if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {
2254 if (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY)
2255 return NOTIFY_DONE;
2256
2257 priority = iscsi_app->app.priority;
2258 } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {
2259 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)
2260 return NOTIFY_DONE;
2261
2262 if (!iscsi_app->app.priority)
2263 return NOTIFY_DONE;
2264
2265 priority = ffs(iscsi_app->app.priority) - 1;
2266 } else {
2267 return NOTIFY_DONE;
2268 }
2269
2270 if (iscsi_app->app.protocol != 3260)
2271 return NOTIFY_DONE;
2272
2273 log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n",
2274 iscsi_app->ifindex, priority);
2275
2276 ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);
2277 if (!ndev)
2278 return NOTIFY_DONE;
2279
2280 cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port);
2281
2282 dev_put(ndev);
2283 if (!cdev)
2284 return NOTIFY_DONE;
2285
2286 pmap = &cdev->pmap;
2287
2288 for (i = 0; i < pmap->used; i++) {
2289 if (pmap->port_csk[i]) {
2290 struct cxgbi_sock *csk = pmap->port_csk[i];
2291
2292 if (csk->dcb_priority != priority) {
2293 iscsi_conn_failure(csk->user_data,
2294 ISCSI_ERR_CONN_FAILED);
2295 pr_info("Restarting iSCSI connection %p with "
2296 "priority %u->%u.\n", csk,
2297 csk->dcb_priority, priority);
2298 }
2299 }
2300 }
2301 return NOTIFY_OK;
2302 }
2303 #endif
2304
2305 static int __init cxgb4i_init_module(void)
2306 {
2307 int rc;
2308
2309 printk(KERN_INFO "%s", version);
2310
2311 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2312 if (rc < 0)
2313 return rc;
2314 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
2315
2316 #ifdef CONFIG_CHELSIO_T4_DCB
2317 pr_info("%s dcb enabled.\n", DRV_MODULE_NAME);
2318 register_dcbevent_notifier(&cxgb4_dcb_change);
2319 #endif
2320 return 0;
2321 }
2322
2323 static void __exit cxgb4i_exit_module(void)
2324 {
2325 #ifdef CONFIG_CHELSIO_T4_DCB
2326 unregister_dcbevent_notifier(&cxgb4_dcb_change);
2327 #endif
2328 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2329 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2330 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2331 }
2332
2333 module_init(cxgb4i_init_module);
2334 module_exit(cxgb4i_exit_module);
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