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drm/panel: simple: add Multi-Inno Technology MI0700A2T-30
[drm/drm-misc.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
blobc07d2e3b4bcff71d41f43eac18596824ecef2ada
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 receive 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 .cmd_size = sizeof(struct iscsi_cmd),
120 };
121
122 static struct iscsi_transport cxgb4i_iscsi_transport = {
123 .owner = THIS_MODULE,
124 .name = DRV_MODULE_NAME,
125 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
126 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
127 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
128 .attr_is_visible = cxgbi_attr_is_visible,
129 .get_host_param = cxgbi_get_host_param,
130 .set_host_param = cxgbi_set_host_param,
131 /* session management */
132 .create_session = cxgbi_create_session,
133 .destroy_session = cxgbi_destroy_session,
134 .get_session_param = iscsi_session_get_param,
135 /* connection management */
136 .create_conn = cxgbi_create_conn,
137 .bind_conn = cxgbi_bind_conn,
138 .unbind_conn = iscsi_conn_unbind,
139 .destroy_conn = iscsi_tcp_conn_teardown,
140 .start_conn = iscsi_conn_start,
141 .stop_conn = iscsi_conn_stop,
142 .get_conn_param = iscsi_conn_get_param,
143 .set_param = cxgbi_set_conn_param,
144 .get_stats = cxgbi_get_conn_stats,
145 /* pdu xmit req from user space */
146 .send_pdu = iscsi_conn_send_pdu,
147 /* task */
148 .init_task = iscsi_tcp_task_init,
149 .xmit_task = iscsi_tcp_task_xmit,
150 .cleanup_task = cxgbi_cleanup_task,
151 /* pdu */
152 .alloc_pdu = cxgbi_conn_alloc_pdu,
153 .init_pdu = cxgbi_conn_init_pdu,
154 .xmit_pdu = cxgbi_conn_xmit_pdu,
155 .parse_pdu_itt = cxgbi_parse_pdu_itt,
156 /* TCP connect/disconnect */
157 .get_ep_param = cxgbi_get_ep_param,
158 .ep_connect = cxgbi_ep_connect,
159 .ep_poll = cxgbi_ep_poll,
160 .ep_disconnect = cxgbi_ep_disconnect,
161 /* Error recovery timeout call */
162 .session_recovery_timedout = iscsi_session_recovery_timedout,
163 };
164
165 #ifdef CONFIG_CHELSIO_T4_DCB
166 static int
167 cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *);
168
169 static struct notifier_block cxgb4_dcb_change = {
170 .notifier_call = cxgb4_dcb_change_notify,
171 };
172 #endif
173
174 static struct scsi_transport_template *cxgb4i_stt;
175
176 /*
177 * CPL (Chelsio Protocol Language) defines a message passing interface between
178 * the host driver and Chelsio asic.
179 * The section below implments CPLs that related to iscsi tcp connection
180 * open/close/abort and data send/receive.
181 */
182
183 #define RCV_BUFSIZ_MASK 0x3FFU
184 #define MAX_IMM_TX_PKT_LEN 256
185
186 static int push_tx_frames(struct cxgbi_sock *, int);
187
188 /*
189 * is_ofld_imm - check whether a packet can be sent as immediate data
190 * @skb: the packet
191 *
192 * Returns true if a packet can be sent as an offload WR with immediate
193 * data. We currently use the same limit as for Ethernet packets.
194 */
195 static inline bool is_ofld_imm(const struct sk_buff *skb)
196 {
197 int len = skb->len;
198
199 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
200 len += sizeof(struct fw_ofld_tx_data_wr);
201
202 if (likely(cxgbi_skcb_test_flag((struct sk_buff *)skb, SKCBF_TX_ISO)))
203 len += sizeof(struct cpl_tx_data_iso);
204
205 return (len <= MAX_IMM_OFLD_TX_DATA_WR_LEN);
206 }
207
208 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
209 struct l2t_entry *e)
210 {
211 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
212 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
213 unsigned long long opt0;
214 unsigned int opt2;
215 unsigned int qid_atid = ((unsigned int)csk->atid) |
216 (((unsigned int)csk->rss_qid) << 14);
217
218 opt0 = KEEP_ALIVE_F |
219 WND_SCALE_V(wscale) |
220 MSS_IDX_V(csk->mss_idx) |
221 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
222 TX_CHAN_V(csk->tx_chan) |
223 SMAC_SEL_V(csk->smac_idx) |
224 ULP_MODE_V(ULP_MODE_ISCSI) |
225 RCV_BUFSIZ_V(csk->rcv_win >> 10);
226
227 opt2 = RX_CHANNEL_V(0) |
228 RSS_QUEUE_VALID_F |
229 RSS_QUEUE_V(csk->rss_qid);
230
231 if (is_t4(lldi->adapter_type)) {
232 struct cpl_act_open_req *req =
233 (struct cpl_act_open_req *)skb->head;
234
235 INIT_TP_WR(req, 0);
236 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
237 qid_atid));
238 req->local_port = csk->saddr.sin_port;
239 req->peer_port = csk->daddr.sin_port;
240 req->local_ip = csk->saddr.sin_addr.s_addr;
241 req->peer_ip = csk->daddr.sin_addr.s_addr;
242 req->opt0 = cpu_to_be64(opt0);
243 req->params = cpu_to_be32(cxgb4_select_ntuple(
244 csk->cdev->ports[csk->port_id],
245 csk->l2t));
246 opt2 |= RX_FC_VALID_F;
247 req->opt2 = cpu_to_be32(opt2);
248
249 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
250 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
251 csk, &req->local_ip, ntohs(req->local_port),
252 &req->peer_ip, ntohs(req->peer_port),
253 csk->atid, csk->rss_qid);
254 } else if (is_t5(lldi->adapter_type)) {
255 struct cpl_t5_act_open_req *req =
256 (struct cpl_t5_act_open_req *)skb->head;
257 u32 isn = (get_random_u32() & ~7UL) - 1;
258
259 INIT_TP_WR(req, 0);
260 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
261 qid_atid));
262 req->local_port = csk->saddr.sin_port;
263 req->peer_port = csk->daddr.sin_port;
264 req->local_ip = csk->saddr.sin_addr.s_addr;
265 req->peer_ip = csk->daddr.sin_addr.s_addr;
266 req->opt0 = cpu_to_be64(opt0);
267 req->params = cpu_to_be64(FILTER_TUPLE_V(
268 cxgb4_select_ntuple(
269 csk->cdev->ports[csk->port_id],
270 csk->l2t)));
271 req->rsvd = cpu_to_be32(isn);
272 opt2 |= T5_ISS_VALID;
273 opt2 |= T5_OPT_2_VALID_F;
274
275 req->opt2 = cpu_to_be32(opt2);
276
277 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
278 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
279 csk, &req->local_ip, ntohs(req->local_port),
280 &req->peer_ip, ntohs(req->peer_port),
281 csk->atid, csk->rss_qid);
282 } else {
283 struct cpl_t6_act_open_req *req =
284 (struct cpl_t6_act_open_req *)skb->head;
285 u32 isn = (get_random_u32() & ~7UL) - 1;
286
287 INIT_TP_WR(req, 0);
288 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
289 qid_atid));
290 req->local_port = csk->saddr.sin_port;
291 req->peer_port = csk->daddr.sin_port;
292 req->local_ip = csk->saddr.sin_addr.s_addr;
293 req->peer_ip = csk->daddr.sin_addr.s_addr;
294 req->opt0 = cpu_to_be64(opt0);
295 req->params = cpu_to_be64(FILTER_TUPLE_V(
296 cxgb4_select_ntuple(
297 csk->cdev->ports[csk->port_id],
298 csk->l2t)));
299 req->rsvd = cpu_to_be32(isn);
300
301 opt2 |= T5_ISS_VALID;
302 opt2 |= RX_FC_DISABLE_F;
303 opt2 |= T5_OPT_2_VALID_F;
304
305 req->opt2 = cpu_to_be32(opt2);
306 req->rsvd2 = cpu_to_be32(0);
307 req->opt3 = cpu_to_be32(0);
308
309 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
310 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
311 csk, &req->local_ip, ntohs(req->local_port),
312 &req->peer_ip, ntohs(req->peer_port),
313 csk->atid, csk->rss_qid);
314 }
315
316 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
317
318 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
319 (&csk->saddr), (&csk->daddr),
320 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
321 csk->state, csk->flags, csk->atid, csk->rss_qid);
322
323 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
324 }
325
326 #if IS_ENABLED(CONFIG_IPV6)
327 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
328 struct l2t_entry *e)
329 {
330 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
331 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
332 unsigned long long opt0;
333 unsigned int opt2;
334 unsigned int qid_atid = ((unsigned int)csk->atid) |
335 (((unsigned int)csk->rss_qid) << 14);
336
337 opt0 = KEEP_ALIVE_F |
338 WND_SCALE_V(wscale) |
339 MSS_IDX_V(csk->mss_idx) |
340 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
341 TX_CHAN_V(csk->tx_chan) |
342 SMAC_SEL_V(csk->smac_idx) |
343 ULP_MODE_V(ULP_MODE_ISCSI) |
344 RCV_BUFSIZ_V(csk->rcv_win >> 10);
345
346 opt2 = RX_CHANNEL_V(0) |
347 RSS_QUEUE_VALID_F |
348 RSS_QUEUE_V(csk->rss_qid);
349
350 if (is_t4(lldi->adapter_type)) {
351 struct cpl_act_open_req6 *req =
352 (struct cpl_act_open_req6 *)skb->head;
353
354 INIT_TP_WR(req, 0);
355 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
356 qid_atid));
357 req->local_port = csk->saddr6.sin6_port;
358 req->peer_port = csk->daddr6.sin6_port;
359
360 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
361 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
362 8);
363 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
364 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
365 8);
366
367 req->opt0 = cpu_to_be64(opt0);
368
369 opt2 |= RX_FC_VALID_F;
370 req->opt2 = cpu_to_be32(opt2);
371
372 req->params = cpu_to_be32(cxgb4_select_ntuple(
373 csk->cdev->ports[csk->port_id],
374 csk->l2t));
375 } else if (is_t5(lldi->adapter_type)) {
376 struct cpl_t5_act_open_req6 *req =
377 (struct cpl_t5_act_open_req6 *)skb->head;
378
379 INIT_TP_WR(req, 0);
380 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
381 qid_atid));
382 req->local_port = csk->saddr6.sin6_port;
383 req->peer_port = csk->daddr6.sin6_port;
384 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
385 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
386 8);
387 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
388 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
389 8);
390 req->opt0 = cpu_to_be64(opt0);
391
392 opt2 |= T5_OPT_2_VALID_F;
393 req->opt2 = cpu_to_be32(opt2);
394
395 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
396 csk->cdev->ports[csk->port_id],
397 csk->l2t)));
398 } else {
399 struct cpl_t6_act_open_req6 *req =
400 (struct cpl_t6_act_open_req6 *)skb->head;
401
402 INIT_TP_WR(req, 0);
403 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
404 qid_atid));
405 req->local_port = csk->saddr6.sin6_port;
406 req->peer_port = csk->daddr6.sin6_port;
407 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
408 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
409 8);
410 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
411 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
412 8);
413 req->opt0 = cpu_to_be64(opt0);
414
415 opt2 |= RX_FC_DISABLE_F;
416 opt2 |= T5_OPT_2_VALID_F;
417
418 req->opt2 = cpu_to_be32(opt2);
419
420 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
421 csk->cdev->ports[csk->port_id],
422 csk->l2t)));
423
424 req->rsvd2 = cpu_to_be32(0);
425 req->opt3 = cpu_to_be32(0);
426 }
427
428 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
429
430 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
431 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
432 csk->flags, csk->atid,
433 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
434 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
435 csk->rss_qid);
436
437 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
438 }
439 #endif
440
441 static void send_close_req(struct cxgbi_sock *csk)
442 {
443 struct sk_buff *skb = csk->cpl_close;
444 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
445 unsigned int tid = csk->tid;
446
447 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
448 "csk 0x%p,%u,0x%lx, tid %u.\n",
449 csk, csk->state, csk->flags, csk->tid);
450 csk->cpl_close = NULL;
451 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
452 INIT_TP_WR(req, tid);
453 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
454 req->rsvd = 0;
455
456 cxgbi_sock_skb_entail(csk, skb);
457 if (csk->state >= CTP_ESTABLISHED)
458 push_tx_frames(csk, 1);
459 }
460
461 static void abort_arp_failure(void *handle, struct sk_buff *skb)
462 {
463 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
464 struct cpl_abort_req *req;
465
466 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
467 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
468 csk, csk->state, csk->flags, csk->tid);
469 req = (struct cpl_abort_req *)skb->data;
470 req->cmd = CPL_ABORT_NO_RST;
471 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
472 }
473
474 static void send_abort_req(struct cxgbi_sock *csk)
475 {
476 struct cpl_abort_req *req;
477 struct sk_buff *skb = csk->cpl_abort_req;
478
479 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
480 return;
481
482 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
483 send_tx_flowc_wr(csk);
484 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
485 }
486
487 cxgbi_sock_set_state(csk, CTP_ABORTING);
488 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
489 cxgbi_sock_purge_write_queue(csk);
490
491 csk->cpl_abort_req = NULL;
492 req = (struct cpl_abort_req *)skb->head;
493 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
494 req->cmd = CPL_ABORT_SEND_RST;
495 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
496 INIT_TP_WR(req, csk->tid);
497 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
498 req->rsvd0 = htonl(csk->snd_nxt);
499 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
500
501 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
502 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
503 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
504 req->rsvd1);
505
506 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
507 }
508
509 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
510 {
511 struct sk_buff *skb = csk->cpl_abort_rpl;
512 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
513
514 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
515 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
516 csk, csk->state, csk->flags, csk->tid, rst_status);
517
518 csk->cpl_abort_rpl = NULL;
519 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
520 INIT_TP_WR(rpl, csk->tid);
521 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
522 rpl->cmd = rst_status;
523 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
524 }
525
526 /*
527 * CPL connection rx data ack: host ->
528 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
529 * credits sent.
530 */
531 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
532 {
533 struct sk_buff *skb;
534 struct cpl_rx_data_ack *req;
535
536 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
537 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
538 csk, csk->state, csk->flags, csk->tid, credits);
539
540 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
541 if (!skb) {
542 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
543 return 0;
544 }
545 req = (struct cpl_rx_data_ack *)skb->head;
546
547 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
548 INIT_TP_WR(req, csk->tid);
549 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
550 csk->tid));
551 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
552 | RX_FORCE_ACK_F);
553 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
554 return credits;
555 }
556
557 /*
558 * sgl_len - calculates the size of an SGL of the given capacity
559 * @n: the number of SGL entries
560 * Calculates the number of flits needed for a scatter/gather list that
561 * can hold the given number of entries.
562 */
563 static inline unsigned int sgl_len(unsigned int n)
564 {
565 n--;
566 return (3 * n) / 2 + (n & 1) + 2;
567 }
568
569 /*
570 * calc_tx_flits_ofld - calculate # of flits for an offload packet
571 * @skb: the packet
572 *
573 * Returns the number of flits needed for the given offload packet.
574 * These packets are already fully constructed and no additional headers
575 * will be added.
576 */
577 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
578 {
579 unsigned int flits, cnt;
580
581 if (is_ofld_imm(skb))
582 return DIV_ROUND_UP(skb->len, 8);
583 flits = skb_transport_offset(skb) / 8;
584 cnt = skb_shinfo(skb)->nr_frags;
585 if (skb_tail_pointer(skb) != skb_transport_header(skb))
586 cnt++;
587 return flits + sgl_len(cnt);
588 }
589
590 #define FLOWC_WR_NPARAMS_MIN 9
591 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
592 {
593 int nparams, flowclen16, flowclen;
594
595 nparams = FLOWC_WR_NPARAMS_MIN;
596 #ifdef CONFIG_CHELSIO_T4_DCB
597 nparams++;
598 #endif
599 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
600 flowclen16 = DIV_ROUND_UP(flowclen, 16);
601 flowclen = flowclen16 * 16;
602 /*
603 * Return the number of 16-byte credits used by the FlowC request.
604 * Pass back the nparams and actual FlowC length if requested.
605 */
606 if (nparamsp)
607 *nparamsp = nparams;
608 if (flowclenp)
609 *flowclenp = flowclen;
610
611 return flowclen16;
612 }
613
614 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
615 {
616 struct sk_buff *skb;
617 struct fw_flowc_wr *flowc;
618 int nparams, flowclen16, flowclen;
619
620 #ifdef CONFIG_CHELSIO_T4_DCB
621 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
622 #endif
623 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
624 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
625 flowc = (struct fw_flowc_wr *)skb->head;
626 flowc->op_to_nparams =
627 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
628 flowc->flowid_len16 =
629 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
630 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
631 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
632 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
633 flowc->mnemval[1].val = htonl(csk->tx_chan);
634 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
635 flowc->mnemval[2].val = htonl(csk->tx_chan);
636 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
637 flowc->mnemval[3].val = htonl(csk->rss_qid);
638 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
639 flowc->mnemval[4].val = htonl(csk->snd_nxt);
640 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
641 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
642 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
643 flowc->mnemval[6].val = htonl(csk->snd_win);
644 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
645 flowc->mnemval[7].val = htonl(csk->advmss);
646 flowc->mnemval[8].mnemonic = 0;
647 flowc->mnemval[8].val = 0;
648 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
649 if (csk->cdev->skb_iso_txhdr)
650 flowc->mnemval[8].val = cpu_to_be32(CXGBI_MAX_ISO_DATA_IN_SKB);
651 else
652 flowc->mnemval[8].val = cpu_to_be32(16128);
653 #ifdef CONFIG_CHELSIO_T4_DCB
654 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
655 if (vlan == CPL_L2T_VLAN_NONE) {
656 pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n",
657 csk->tid);
658 flowc->mnemval[9].val = cpu_to_be32(0);
659 } else {
660 flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >>
661 VLAN_PRIO_SHIFT);
662 }
663 #endif
664
665 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
666
667 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
668 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
669 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
670 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
671 csk->advmss);
672
673 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
674
675 return flowclen16;
676 }
677
678 static void
679 cxgb4i_make_tx_iso_cpl(struct sk_buff *skb, struct cpl_tx_data_iso *cpl)
680 {
681 struct cxgbi_iso_info *info = (struct cxgbi_iso_info *)skb->head;
682 u32 imm_en = !!(info->flags & CXGBI_ISO_INFO_IMM_ENABLE);
683 u32 fslice = !!(info->flags & CXGBI_ISO_INFO_FSLICE);
684 u32 lslice = !!(info->flags & CXGBI_ISO_INFO_LSLICE);
685 u32 pdu_type = (info->op == ISCSI_OP_SCSI_CMD) ? 0 : 1;
686 u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
687
688 cpl->op_to_scsi = cpu_to_be32(CPL_TX_DATA_ISO_OP_V(CPL_TX_DATA_ISO) |
689 CPL_TX_DATA_ISO_FIRST_V(fslice) |
690 CPL_TX_DATA_ISO_LAST_V(lslice) |
691 CPL_TX_DATA_ISO_CPLHDRLEN_V(0) |
692 CPL_TX_DATA_ISO_HDRCRC_V(submode & 1) |
693 CPL_TX_DATA_ISO_PLDCRC_V(((submode >> 1) & 1)) |
694 CPL_TX_DATA_ISO_IMMEDIATE_V(imm_en) |
695 CPL_TX_DATA_ISO_SCSI_V(pdu_type));
696
697 cpl->ahs_len = info->ahs;
698 cpl->mpdu = cpu_to_be16(DIV_ROUND_UP(info->mpdu, 4));
699 cpl->burst_size = cpu_to_be32(info->burst_size);
700 cpl->len = cpu_to_be32(info->len);
701 cpl->reserved2_seglen_offset =
702 cpu_to_be32(CPL_TX_DATA_ISO_SEGLEN_OFFSET_V(info->segment_offset));
703 cpl->datasn_offset = cpu_to_be32(info->datasn_offset);
704 cpl->buffer_offset = cpu_to_be32(info->buffer_offset);
705 cpl->reserved3 = cpu_to_be32(0);
706 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
707 "iso: flags 0x%x, op %u, ahs %u, num_pdu %u, mpdu %u, "
708 "burst_size %u, iso_len %u\n",
709 info->flags, info->op, info->ahs, info->num_pdu,
710 info->mpdu, info->burst_size << 2, info->len);
711 }
712
713 static void
714 cxgb4i_make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int dlen,
715 int len, u32 credits, int compl)
716 {
717 struct cxgbi_device *cdev = csk->cdev;
718 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
719 struct fw_ofld_tx_data_wr *req;
720 struct cpl_tx_data_iso *cpl;
721 u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
722 u32 wr_ulp_mode = 0;
723 u32 hdr_size = sizeof(*req);
724 u32 opcode = FW_OFLD_TX_DATA_WR;
725 u32 immlen = 0;
726 u32 force = is_t5(lldi->adapter_type) ? TX_FORCE_V(!submode) :
727 T6_TX_FORCE_F;
728
729 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
730 hdr_size += sizeof(struct cpl_tx_data_iso);
731 opcode = FW_ISCSI_TX_DATA_WR;
732 immlen += sizeof(struct cpl_tx_data_iso);
733 submode |= 8;
734 }
735
736 if (is_ofld_imm(skb))
737 immlen += dlen;
738
739 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, hdr_size);
740 req->op_to_immdlen = cpu_to_be32(FW_WR_OP_V(opcode) |
741 FW_WR_COMPL_V(compl) |
742 FW_WR_IMMDLEN_V(immlen));
743 req->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
744 FW_WR_LEN16_V(credits));
745 req->plen = cpu_to_be32(len);
746 cpl = (struct cpl_tx_data_iso *)(req + 1);
747
748 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)))
749 cxgb4i_make_tx_iso_cpl(skb, cpl);
750
751 if (submode)
752 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
753 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
754
755 req->tunnel_to_proxy = cpu_to_be32(wr_ulp_mode | force |
756 FW_OFLD_TX_DATA_WR_SHOVE_V(1U));
757
758 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
759 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
760 }
761
762 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
763 {
764 kfree_skb(skb);
765 }
766
767 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
768 {
769 int total_size = 0;
770 struct sk_buff *skb;
771
772 if (unlikely(csk->state < CTP_ESTABLISHED ||
773 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
774 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
775 1 << CXGBI_DBG_PDU_TX,
776 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
777 csk, csk->state, csk->flags, csk->tid);
778 return 0;
779 }
780
781 while (csk->wr_cred && ((skb = skb_peek(&csk->write_queue)) != NULL)) {
782 struct cxgbi_iso_info *iso_cpl;
783 u32 dlen = skb->len;
784 u32 len = skb->len;
785 u32 iso_cpl_len = 0;
786 u32 flowclen16 = 0;
787 u32 credits_needed;
788 u32 num_pdu = 1, hdr_len;
789
790 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))
791 iso_cpl_len = sizeof(struct cpl_tx_data_iso);
792
793 if (is_ofld_imm(skb))
794 credits_needed = DIV_ROUND_UP(dlen + iso_cpl_len, 16);
795 else
796 credits_needed =
797 DIV_ROUND_UP((8 * calc_tx_flits_ofld(skb)) +
798 iso_cpl_len, 16);
799
800 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
801 credits_needed +=
802 DIV_ROUND_UP(sizeof(struct fw_ofld_tx_data_wr), 16);
803
804 /*
805 * Assumes the initial credits is large enough to support
806 * fw_flowc_wr plus largest possible first payload
807 */
808 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
809 flowclen16 = send_tx_flowc_wr(csk);
810 csk->wr_cred -= flowclen16;
811 csk->wr_una_cred += flowclen16;
812 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
813 }
814
815 if (csk->wr_cred < credits_needed) {
816 log_debug(1 << CXGBI_DBG_PDU_TX,
817 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
818 csk, skb->len, skb->data_len,
819 credits_needed, csk->wr_cred);
820
821 csk->no_tx_credits++;
822 break;
823 }
824
825 csk->no_tx_credits = 0;
826
827 __skb_unlink(skb, &csk->write_queue);
828 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
829 skb->csum = (__force __wsum)(credits_needed + flowclen16);
830 csk->wr_cred -= credits_needed;
831 csk->wr_una_cred += credits_needed;
832 cxgbi_sock_enqueue_wr(csk, skb);
833
834 log_debug(1 << CXGBI_DBG_PDU_TX,
835 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
836 csk, skb->len, skb->data_len, credits_needed,
837 csk->wr_cred, csk->wr_una_cred);
838
839 if (!req_completion &&
840 ((csk->wr_una_cred >= (csk->wr_max_cred / 2)) ||
841 after(csk->write_seq, (csk->snd_una + csk->snd_win / 2))))
842 req_completion = 1;
843
844 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
845 u32 ulp_mode = cxgbi_skcb_tx_ulp_mode(skb);
846
847 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
848 iso_cpl = (struct cxgbi_iso_info *)skb->head;
849 num_pdu = iso_cpl->num_pdu;
850 hdr_len = cxgbi_skcb_tx_iscsi_hdrlen(skb);
851 len += (cxgbi_ulp_extra_len(ulp_mode) * num_pdu) +
852 (hdr_len * (num_pdu - 1));
853 } else {
854 len += cxgbi_ulp_extra_len(ulp_mode);
855 }
856
857 cxgb4i_make_tx_data_wr(csk, skb, dlen, len,
858 credits_needed, req_completion);
859 csk->snd_nxt += len;
860 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
861 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
862 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
863 struct cpl_close_con_req *req =
864 (struct cpl_close_con_req *)skb->data;
865
866 req->wr.wr_hi |= cpu_to_be32(FW_WR_COMPL_F);
867 }
868
869 total_size += skb->truesize;
870 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
871
872 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
873 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
874 csk, csk->state, csk->flags, csk->tid, skb, len);
875 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
876 }
877 return total_size;
878 }
879
880 static inline void free_atid(struct cxgbi_sock *csk)
881 {
882 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
883
884 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
885 cxgb4_free_atid(lldi->tids, csk->atid);
886 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
887 cxgbi_sock_put(csk);
888 }
889 }
890
891 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
892 {
893 struct cxgbi_sock *csk;
894 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
895 unsigned short tcp_opt = ntohs(req->tcp_opt);
896 unsigned int tid = GET_TID(req);
897 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
898 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
899 struct tid_info *t = lldi->tids;
900 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
901
902 csk = lookup_atid(t, atid);
903 if (unlikely(!csk)) {
904 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
905 goto rel_skb;
906 }
907
908 if (csk->atid != atid) {
909 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
910 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
911 goto rel_skb;
912 }
913
914 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
915 (&csk->saddr), (&csk->daddr),
916 atid, tid, csk, csk->state, csk->flags, rcv_isn);
917
918 module_put(cdev->owner);
919
920 cxgbi_sock_get(csk);
921 csk->tid = tid;
922 cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);
923 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
924
925 free_atid(csk);
926
927 spin_lock_bh(&csk->lock);
928 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
929 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
930 csk, csk->state, csk->flags, csk->tid);
931
932 if (csk->retry_timer.function) {
933 del_timer(&csk->retry_timer);
934 csk->retry_timer.function = NULL;
935 }
936
937 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
938 /*
939 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
940 * pass through opt0.
941 */
942 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
943 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
944
945 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
946 if (TCPOPT_TSTAMP_G(tcp_opt))
947 csk->advmss -= 12;
948 if (csk->advmss < 128)
949 csk->advmss = 128;
950
951 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
952 "csk 0x%p, mss_idx %u, advmss %u.\n",
953 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
954
955 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
956
957 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
958 send_abort_req(csk);
959 else {
960 if (skb_queue_len(&csk->write_queue))
961 push_tx_frames(csk, 0);
962 cxgbi_conn_tx_open(csk);
963 }
964 spin_unlock_bh(&csk->lock);
965
966 rel_skb:
967 __kfree_skb(skb);
968 }
969
970 static int act_open_rpl_status_to_errno(int status)
971 {
972 switch (status) {
973 case CPL_ERR_CONN_RESET:
974 return -ECONNREFUSED;
975 case CPL_ERR_ARP_MISS:
976 return -EHOSTUNREACH;
977 case CPL_ERR_CONN_TIMEDOUT:
978 return -ETIMEDOUT;
979 case CPL_ERR_TCAM_FULL:
980 return -ENOMEM;
981 case CPL_ERR_CONN_EXIST:
982 return -EADDRINUSE;
983 default:
984 return -EIO;
985 }
986 }
987
988 static void csk_act_open_retry_timer(struct timer_list *t)
989 {
990 struct sk_buff *skb = NULL;
991 struct cxgbi_sock *csk = from_timer(csk, t, retry_timer);
992 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
993 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
994 struct l2t_entry *);
995 int t4 = is_t4(lldi->adapter_type), size, size6;
996
997 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
998 "csk 0x%p,%u,0x%lx,%u.\n",
999 csk, csk->state, csk->flags, csk->tid);
1000
1001 cxgbi_sock_get(csk);
1002 spin_lock_bh(&csk->lock);
1003
1004 if (t4) {
1005 size = sizeof(struct cpl_act_open_req);
1006 size6 = sizeof(struct cpl_act_open_req6);
1007 } else {
1008 size = sizeof(struct cpl_t5_act_open_req);
1009 size6 = sizeof(struct cpl_t5_act_open_req6);
1010 }
1011
1012 if (csk->csk_family == AF_INET) {
1013 send_act_open_func = send_act_open_req;
1014 skb = alloc_wr(size, 0, GFP_ATOMIC);
1015 #if IS_ENABLED(CONFIG_IPV6)
1016 } else {
1017 send_act_open_func = send_act_open_req6;
1018 skb = alloc_wr(size6, 0, GFP_ATOMIC);
1019 #endif
1020 }
1021
1022 if (!skb)
1023 cxgbi_sock_fail_act_open(csk, -ENOMEM);
1024 else {
1025 skb->sk = (struct sock *)csk;
1026 t4_set_arp_err_handler(skb, csk,
1027 cxgbi_sock_act_open_req_arp_failure);
1028 send_act_open_func(csk, skb, csk->l2t);
1029 }
1030
1031 spin_unlock_bh(&csk->lock);
1032 cxgbi_sock_put(csk);
1033
1034 }
1035
1036 static inline bool is_neg_adv(unsigned int status)
1037 {
1038 return status == CPL_ERR_RTX_NEG_ADVICE ||
1039 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
1040 status == CPL_ERR_PERSIST_NEG_ADVICE;
1041 }
1042
1043 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1044 {
1045 struct cxgbi_sock *csk;
1046 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
1047 unsigned int tid = GET_TID(rpl);
1048 unsigned int atid =
1049 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
1050 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
1051 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1052 struct tid_info *t = lldi->tids;
1053
1054 csk = lookup_atid(t, atid);
1055 if (unlikely(!csk)) {
1056 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
1057 goto rel_skb;
1058 }
1059
1060 pr_info_ipaddr("tid %u/%u, status %u.\n"
1061 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
1062 atid, tid, status, csk, csk->state, csk->flags);
1063
1064 if (is_neg_adv(status))
1065 goto rel_skb;
1066
1067 module_put(cdev->owner);
1068
1069 if (status && status != CPL_ERR_TCAM_FULL &&
1070 status != CPL_ERR_CONN_EXIST &&
1071 status != CPL_ERR_ARP_MISS)
1072 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl),
1073 csk->csk_family);
1074
1075 cxgbi_sock_get(csk);
1076 spin_lock_bh(&csk->lock);
1077
1078 if (status == CPL_ERR_CONN_EXIST &&
1079 csk->retry_timer.function != csk_act_open_retry_timer) {
1080 csk->retry_timer.function = csk_act_open_retry_timer;
1081 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
1082 } else
1083 cxgbi_sock_fail_act_open(csk,
1084 act_open_rpl_status_to_errno(status));
1085
1086 spin_unlock_bh(&csk->lock);
1087 cxgbi_sock_put(csk);
1088 rel_skb:
1089 __kfree_skb(skb);
1090 }
1091
1092 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
1093 {
1094 struct cxgbi_sock *csk;
1095 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
1096 unsigned int tid = GET_TID(req);
1097 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1098 struct tid_info *t = lldi->tids;
1099
1100 csk = lookup_tid(t, tid);
1101 if (unlikely(!csk)) {
1102 pr_err("can't find connection for tid %u.\n", tid);
1103 goto rel_skb;
1104 }
1105 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1106 (&csk->saddr), (&csk->daddr),
1107 csk, csk->state, csk->flags, csk->tid);
1108 cxgbi_sock_rcv_peer_close(csk);
1109 rel_skb:
1110 __kfree_skb(skb);
1111 }
1112
1113 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1114 {
1115 struct cxgbi_sock *csk;
1116 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1117 unsigned int tid = GET_TID(rpl);
1118 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1119 struct tid_info *t = lldi->tids;
1120
1121 csk = lookup_tid(t, tid);
1122 if (unlikely(!csk)) {
1123 pr_err("can't find connection for tid %u.\n", tid);
1124 goto rel_skb;
1125 }
1126 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1127 (&csk->saddr), (&csk->daddr),
1128 csk, csk->state, csk->flags, csk->tid);
1129 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1130 rel_skb:
1131 __kfree_skb(skb);
1132 }
1133
1134 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1135 int *need_rst)
1136 {
1137 switch (abort_reason) {
1138 case CPL_ERR_BAD_SYN:
1139 case CPL_ERR_CONN_RESET:
1140 return csk->state > CTP_ESTABLISHED ?
1141 -EPIPE : -ECONNRESET;
1142 case CPL_ERR_XMIT_TIMEDOUT:
1143 case CPL_ERR_PERSIST_TIMEDOUT:
1144 case CPL_ERR_FINWAIT2_TIMEDOUT:
1145 case CPL_ERR_KEEPALIVE_TIMEDOUT:
1146 return -ETIMEDOUT;
1147 default:
1148 return -EIO;
1149 }
1150 }
1151
1152 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1153 {
1154 struct cxgbi_sock *csk;
1155 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1156 unsigned int tid = GET_TID(req);
1157 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1158 struct tid_info *t = lldi->tids;
1159 int rst_status = CPL_ABORT_NO_RST;
1160
1161 csk = lookup_tid(t, tid);
1162 if (unlikely(!csk)) {
1163 pr_err("can't find connection for tid %u.\n", tid);
1164 goto rel_skb;
1165 }
1166
1167 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1168 (&csk->saddr), (&csk->daddr),
1169 csk, csk->state, csk->flags, csk->tid, req->status);
1170
1171 if (is_neg_adv(req->status))
1172 goto rel_skb;
1173
1174 cxgbi_sock_get(csk);
1175 spin_lock_bh(&csk->lock);
1176
1177 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1178
1179 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1180 send_tx_flowc_wr(csk);
1181 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1182 }
1183
1184 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1185 cxgbi_sock_set_state(csk, CTP_ABORTING);
1186
1187 send_abort_rpl(csk, rst_status);
1188
1189 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1190 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1191 cxgbi_sock_closed(csk);
1192 }
1193
1194 spin_unlock_bh(&csk->lock);
1195 cxgbi_sock_put(csk);
1196 rel_skb:
1197 __kfree_skb(skb);
1198 }
1199
1200 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1201 {
1202 struct cxgbi_sock *csk;
1203 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1204 unsigned int tid = GET_TID(rpl);
1205 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1206 struct tid_info *t = lldi->tids;
1207
1208 csk = lookup_tid(t, tid);
1209 if (!csk)
1210 goto rel_skb;
1211
1212 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1213 (&csk->saddr), (&csk->daddr), csk,
1214 csk->state, csk->flags, csk->tid, rpl->status);
1215
1216 if (rpl->status == CPL_ERR_ABORT_FAILED)
1217 goto rel_skb;
1218
1219 cxgbi_sock_rcv_abort_rpl(csk);
1220 rel_skb:
1221 __kfree_skb(skb);
1222 }
1223
1224 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1225 {
1226 struct cxgbi_sock *csk;
1227 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1228 unsigned int tid = GET_TID(cpl);
1229 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1230 struct tid_info *t = lldi->tids;
1231
1232 csk = lookup_tid(t, tid);
1233 if (!csk) {
1234 pr_err("can't find connection for tid %u.\n", tid);
1235 } else {
1236 /* not expecting this, reset the connection. */
1237 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1238 spin_lock_bh(&csk->lock);
1239 send_abort_req(csk);
1240 spin_unlock_bh(&csk->lock);
1241 }
1242 __kfree_skb(skb);
1243 }
1244
1245 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1246 {
1247 struct cxgbi_sock *csk;
1248 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1249 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1250 unsigned int tid = GET_TID(cpl);
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 conn. for tid %u.\n", tid);
1257 goto rel_skb;
1258 }
1259
1260 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1261 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1262 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1263 pdu_len_ddp);
1264
1265 spin_lock_bh(&csk->lock);
1266
1267 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1268 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1269 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1270 csk, csk->state, csk->flags, csk->tid);
1271 if (csk->state != CTP_ABORTING)
1272 goto abort_conn;
1273 else
1274 goto discard;
1275 }
1276
1277 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1278 cxgbi_skcb_flags(skb) = 0;
1279
1280 skb_reset_transport_header(skb);
1281 __skb_pull(skb, sizeof(*cpl));
1282 __pskb_trim(skb, ntohs(cpl->len));
1283
1284 if (!csk->skb_ulp_lhdr) {
1285 unsigned char *bhs;
1286 unsigned int hlen, dlen, plen;
1287
1288 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1289 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1290 csk, csk->state, csk->flags, csk->tid, skb);
1291 csk->skb_ulp_lhdr = skb;
1292 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1293
1294 if ((CHELSIO_CHIP_VERSION(lldi->adapter_type) <= CHELSIO_T5) &&
1295 (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt)) {
1296 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1297 csk->tid, cxgbi_skcb_tcp_seq(skb),
1298 csk->rcv_nxt);
1299 goto abort_conn;
1300 }
1301
1302 bhs = skb->data;
1303 hlen = ntohs(cpl->len);
1304 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1305
1306 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1307 if (is_t4(lldi->adapter_type))
1308 plen -= 40;
1309
1310 if ((hlen + dlen) != plen) {
1311 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1312 "mismatch %u != %u + %u, seq 0x%x.\n",
1313 csk->tid, plen, hlen, dlen,
1314 cxgbi_skcb_tcp_seq(skb));
1315 goto abort_conn;
1316 }
1317
1318 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1319 if (dlen)
1320 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1321 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1322
1323 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1324 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1325 csk, skb, *bhs, hlen, dlen,
1326 ntohl(*((unsigned int *)(bhs + 16))),
1327 ntohl(*((unsigned int *)(bhs + 24))));
1328
1329 } else {
1330 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1331
1332 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1333 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1334 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1335 csk, csk->state, csk->flags, skb, lskb);
1336 }
1337
1338 __skb_queue_tail(&csk->receive_queue, skb);
1339 spin_unlock_bh(&csk->lock);
1340 return;
1341
1342 abort_conn:
1343 send_abort_req(csk);
1344 discard:
1345 spin_unlock_bh(&csk->lock);
1346 rel_skb:
1347 __kfree_skb(skb);
1348 }
1349
1350 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1351 {
1352 struct cxgbi_sock *csk;
1353 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1354 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1355 struct tid_info *t = lldi->tids;
1356 struct sk_buff *lskb;
1357 u32 tid = GET_TID(cpl);
1358 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1359
1360 csk = lookup_tid(t, tid);
1361 if (unlikely(!csk)) {
1362 pr_err("can't find conn. for tid %u.\n", tid);
1363 goto rel_skb;
1364 }
1365
1366 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1367 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1368 csk, csk->state, csk->flags, csk->tid, skb,
1369 skb->len, pdu_len_ddp);
1370
1371 spin_lock_bh(&csk->lock);
1372
1373 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1374 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1375 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1376 csk, csk->state, csk->flags, csk->tid);
1377
1378 if (csk->state != CTP_ABORTING)
1379 goto abort_conn;
1380 else
1381 goto discard;
1382 }
1383
1384 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1385 cxgbi_skcb_flags(skb) = 0;
1386
1387 skb_reset_transport_header(skb);
1388 __skb_pull(skb, sizeof(*cpl));
1389 __pskb_trim(skb, ntohs(cpl->len));
1390
1391 if (!csk->skb_ulp_lhdr)
1392 csk->skb_ulp_lhdr = skb;
1393
1394 lskb = csk->skb_ulp_lhdr;
1395 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1396
1397 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1398 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1399 csk, csk->state, csk->flags, skb, lskb);
1400
1401 __skb_queue_tail(&csk->receive_queue, skb);
1402 spin_unlock_bh(&csk->lock);
1403 return;
1404
1405 abort_conn:
1406 send_abort_req(csk);
1407 discard:
1408 spin_unlock_bh(&csk->lock);
1409 rel_skb:
1410 __kfree_skb(skb);
1411 }
1412
1413 static void
1414 cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1415 struct sk_buff *skb, u32 ddpvld)
1416 {
1417 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1418 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1419 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1420 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1421 }
1422
1423 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1424 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1425 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1426 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1427 }
1428
1429 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1430 log_debug(1 << CXGBI_DBG_PDU_RX,
1431 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1432 csk, skb, ddpvld);
1433 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1434 }
1435
1436 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1437 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1438 log_debug(1 << CXGBI_DBG_PDU_RX,
1439 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1440 csk, skb, ddpvld);
1441 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1442 }
1443 }
1444
1445 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1446 struct sk_buff *skb)
1447 {
1448 struct cxgbi_sock *csk;
1449 struct sk_buff *lskb;
1450 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1451 unsigned int tid = GET_TID(rpl);
1452 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1453 struct tid_info *t = lldi->tids;
1454 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1455
1456 csk = lookup_tid(t, tid);
1457 if (unlikely(!csk)) {
1458 pr_err("can't find connection for tid %u.\n", tid);
1459 goto rel_skb;
1460 }
1461
1462 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1463 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1464 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1465
1466 spin_lock_bh(&csk->lock);
1467
1468 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1469 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1470 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1471 csk, csk->state, csk->flags, csk->tid);
1472 if (csk->state != CTP_ABORTING)
1473 goto abort_conn;
1474 else
1475 goto discard;
1476 }
1477
1478 if (!csk->skb_ulp_lhdr) {
1479 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1480 goto abort_conn;
1481 }
1482
1483 lskb = csk->skb_ulp_lhdr;
1484 csk->skb_ulp_lhdr = NULL;
1485
1486 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1487
1488 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1489 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1490 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1491
1492 cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1493
1494 log_debug(1 << CXGBI_DBG_PDU_RX,
1495 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1496 csk, lskb, cxgbi_skcb_flags(lskb));
1497
1498 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1499 cxgbi_conn_pdu_ready(csk);
1500 spin_unlock_bh(&csk->lock);
1501 goto rel_skb;
1502
1503 abort_conn:
1504 send_abort_req(csk);
1505 discard:
1506 spin_unlock_bh(&csk->lock);
1507 rel_skb:
1508 __kfree_skb(skb);
1509 }
1510
1511 static void
1512 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1513 {
1514 struct cxgbi_sock *csk;
1515 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1516 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1517 struct tid_info *t = lldi->tids;
1518 struct sk_buff *data_skb = NULL;
1519 u32 tid = GET_TID(rpl);
1520 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1521 u32 seq = be32_to_cpu(rpl->seq);
1522 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1523
1524 csk = lookup_tid(t, tid);
1525 if (unlikely(!csk)) {
1526 pr_err("can't find connection for tid %u.\n", tid);
1527 goto rel_skb;
1528 }
1529
1530 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1531 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1532 "pdu_len_ddp %u, status %u.\n",
1533 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1534 ntohs(rpl->len), pdu_len_ddp, rpl->status);
1535
1536 spin_lock_bh(&csk->lock);
1537
1538 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1539 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1540 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1541 csk, csk->state, csk->flags, csk->tid);
1542
1543 if (csk->state != CTP_ABORTING)
1544 goto abort_conn;
1545 else
1546 goto discard;
1547 }
1548
1549 cxgbi_skcb_tcp_seq(skb) = seq;
1550 cxgbi_skcb_flags(skb) = 0;
1551 cxgbi_skcb_rx_pdulen(skb) = 0;
1552
1553 skb_reset_transport_header(skb);
1554 __skb_pull(skb, sizeof(*rpl));
1555 __pskb_trim(skb, be16_to_cpu(rpl->len));
1556
1557 csk->rcv_nxt = seq + pdu_len_ddp;
1558
1559 if (csk->skb_ulp_lhdr) {
1560 data_skb = skb_peek(&csk->receive_queue);
1561 if (!data_skb ||
1562 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1563 pr_err("Error! freelist data not found 0x%p, tid %u\n",
1564 data_skb, tid);
1565
1566 goto abort_conn;
1567 }
1568 __skb_unlink(data_skb, &csk->receive_queue);
1569
1570 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1571
1572 __skb_queue_tail(&csk->receive_queue, skb);
1573 __skb_queue_tail(&csk->receive_queue, data_skb);
1574 } else {
1575 __skb_queue_tail(&csk->receive_queue, skb);
1576 }
1577
1578 csk->skb_ulp_lhdr = NULL;
1579
1580 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1581 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1582 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1583 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1584
1585 cxgb4i_process_ddpvld(csk, skb, ddpvld);
1586
1587 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1588 csk, skb, cxgbi_skcb_flags(skb));
1589
1590 cxgbi_conn_pdu_ready(csk);
1591 spin_unlock_bh(&csk->lock);
1592
1593 return;
1594
1595 abort_conn:
1596 send_abort_req(csk);
1597 discard:
1598 spin_unlock_bh(&csk->lock);
1599 rel_skb:
1600 __kfree_skb(skb);
1601 }
1602
1603 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1604 {
1605 struct cxgbi_sock *csk;
1606 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1607 unsigned int tid = GET_TID(rpl);
1608 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1609 struct tid_info *t = lldi->tids;
1610
1611 csk = lookup_tid(t, tid);
1612 if (unlikely(!csk))
1613 pr_err("can't find connection for tid %u.\n", tid);
1614 else {
1615 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1616 "csk 0x%p,%u,0x%lx,%u.\n",
1617 csk, csk->state, csk->flags, csk->tid);
1618 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1619 rpl->seq_vld);
1620 }
1621 __kfree_skb(skb);
1622 }
1623
1624 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1625 {
1626 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1627 unsigned int tid = GET_TID(rpl);
1628 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1629 struct tid_info *t = lldi->tids;
1630 struct cxgbi_sock *csk;
1631
1632 csk = lookup_tid(t, tid);
1633 if (!csk) {
1634 pr_err("can't find conn. for tid %u.\n", tid);
1635 return;
1636 }
1637
1638 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1639 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1640 csk, csk->state, csk->flags, csk->tid, rpl->status);
1641
1642 if (rpl->status != CPL_ERR_NONE) {
1643 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1644 csk, tid, rpl->status);
1645 csk->err = -EINVAL;
1646 }
1647
1648 complete(&csk->cmpl);
1649
1650 __kfree_skb(skb);
1651 }
1652
1653 static int alloc_cpls(struct cxgbi_sock *csk)
1654 {
1655 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1656 0, GFP_KERNEL);
1657 if (!csk->cpl_close)
1658 return -ENOMEM;
1659
1660 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1661 0, GFP_KERNEL);
1662 if (!csk->cpl_abort_req)
1663 goto free_cpls;
1664
1665 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1666 0, GFP_KERNEL);
1667 if (!csk->cpl_abort_rpl)
1668 goto free_cpls;
1669 return 0;
1670
1671 free_cpls:
1672 cxgbi_sock_free_cpl_skbs(csk);
1673 return -ENOMEM;
1674 }
1675
1676 static inline void l2t_put(struct cxgbi_sock *csk)
1677 {
1678 if (csk->l2t) {
1679 cxgb4_l2t_release(csk->l2t);
1680 csk->l2t = NULL;
1681 cxgbi_sock_put(csk);
1682 }
1683 }
1684
1685 static void release_offload_resources(struct cxgbi_sock *csk)
1686 {
1687 struct cxgb4_lld_info *lldi;
1688 #if IS_ENABLED(CONFIG_IPV6)
1689 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1690 #endif
1691
1692 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1693 "csk 0x%p,%u,0x%lx,%u.\n",
1694 csk, csk->state, csk->flags, csk->tid);
1695
1696 cxgbi_sock_free_cpl_skbs(csk);
1697 cxgbi_sock_purge_write_queue(csk);
1698 if (csk->wr_cred != csk->wr_max_cred) {
1699 cxgbi_sock_purge_wr_queue(csk);
1700 cxgbi_sock_reset_wr_list(csk);
1701 }
1702
1703 l2t_put(csk);
1704 #if IS_ENABLED(CONFIG_IPV6)
1705 if (csk->csk_family == AF_INET6)
1706 cxgb4_clip_release(ndev,
1707 (const u32 *)&csk->saddr6.sin6_addr, 1);
1708 #endif
1709
1710 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1711 free_atid(csk);
1712 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1713 lldi = cxgbi_cdev_priv(csk->cdev);
1714 cxgb4_remove_tid(lldi->tids, 0, csk->tid,
1715 csk->csk_family);
1716 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1717 cxgbi_sock_put(csk);
1718 }
1719 csk->dst = NULL;
1720 }
1721
1722 #ifdef CONFIG_CHELSIO_T4_DCB
1723 static inline u8 get_iscsi_dcb_state(struct net_device *ndev)
1724 {
1725 return ndev->dcbnl_ops->getstate(ndev);
1726 }
1727
1728 static int select_priority(int pri_mask)
1729 {
1730 if (!pri_mask)
1731 return 0;
1732 return (ffs(pri_mask) - 1);
1733 }
1734
1735 static u8 get_iscsi_dcb_priority(struct net_device *ndev)
1736 {
1737 int rv;
1738 u8 caps;
1739
1740 struct dcb_app iscsi_dcb_app = {
1741 .protocol = 3260
1742 };
1743
1744 rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
1745 if (rv)
1746 return 0;
1747
1748 if (caps & DCB_CAP_DCBX_VER_IEEE) {
1749 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_STREAM;
1750 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
1751 if (!rv) {
1752 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
1753 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
1754 }
1755 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
1756 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
1757 rv = dcb_getapp(ndev, &iscsi_dcb_app);
1758 }
1759
1760 log_debug(1 << CXGBI_DBG_ISCSI,
1761 "iSCSI priority is set to %u\n", select_priority(rv));
1762 return select_priority(rv);
1763 }
1764 #endif
1765
1766 static int init_act_open(struct cxgbi_sock *csk)
1767 {
1768 struct cxgbi_device *cdev = csk->cdev;
1769 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1770 struct net_device *ndev = cdev->ports[csk->port_id];
1771 struct sk_buff *skb = NULL;
1772 struct neighbour *n = NULL;
1773 void *daddr;
1774 unsigned int step;
1775 unsigned int rxq_idx;
1776 unsigned int size, size6;
1777 unsigned int linkspeed;
1778 unsigned int rcv_winf, snd_winf;
1779 #ifdef CONFIG_CHELSIO_T4_DCB
1780 u8 priority = 0;
1781 #endif
1782 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1783 "csk 0x%p,%u,0x%lx,%u.\n",
1784 csk, csk->state, csk->flags, csk->tid);
1785
1786 if (csk->csk_family == AF_INET)
1787 daddr = &csk->daddr.sin_addr.s_addr;
1788 #if IS_ENABLED(CONFIG_IPV6)
1789 else if (csk->csk_family == AF_INET6)
1790 daddr = &csk->daddr6.sin6_addr;
1791 #endif
1792 else {
1793 pr_err("address family 0x%x not supported\n", csk->csk_family);
1794 goto rel_resource;
1795 }
1796
1797 n = dst_neigh_lookup(csk->dst, daddr);
1798
1799 if (!n) {
1800 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1801 goto rel_resource;
1802 }
1803
1804 if (!(n->nud_state & NUD_VALID))
1805 neigh_event_send(n, NULL);
1806
1807 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1808 if (csk->atid < 0) {
1809 pr_err("%s, NO atid available.\n", ndev->name);
1810 goto rel_resource_without_clip;
1811 }
1812 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1813 cxgbi_sock_get(csk);
1814
1815 #ifdef CONFIG_CHELSIO_T4_DCB
1816 if (get_iscsi_dcb_state(ndev))
1817 priority = get_iscsi_dcb_priority(ndev);
1818
1819 csk->dcb_priority = priority;
1820 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority);
1821 #else
1822 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1823 #endif
1824 if (!csk->l2t) {
1825 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1826 goto rel_resource_without_clip;
1827 }
1828 cxgbi_sock_get(csk);
1829
1830 #if IS_ENABLED(CONFIG_IPV6)
1831 if (csk->csk_family == AF_INET6)
1832 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1833 #endif
1834
1835 if (is_t4(lldi->adapter_type)) {
1836 size = sizeof(struct cpl_act_open_req);
1837 size6 = sizeof(struct cpl_act_open_req6);
1838 } else if (is_t5(lldi->adapter_type)) {
1839 size = sizeof(struct cpl_t5_act_open_req);
1840 size6 = sizeof(struct cpl_t5_act_open_req6);
1841 } else {
1842 size = sizeof(struct cpl_t6_act_open_req);
1843 size6 = sizeof(struct cpl_t6_act_open_req6);
1844 }
1845
1846 if (csk->csk_family == AF_INET)
1847 skb = alloc_wr(size, 0, GFP_NOIO);
1848 #if IS_ENABLED(CONFIG_IPV6)
1849 else
1850 skb = alloc_wr(size6, 0, GFP_NOIO);
1851 #endif
1852
1853 if (!skb)
1854 goto rel_resource;
1855 skb->sk = (struct sock *)csk;
1856 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1857
1858 if (!csk->mtu)
1859 csk->mtu = dst_mtu(csk->dst);
1860 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1861 csk->tx_chan = cxgb4_port_chan(ndev);
1862 csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
1863 step = lldi->ntxq / lldi->nchan;
1864 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1865 step = lldi->nrxq / lldi->nchan;
1866 rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);
1867 cdev->rxq_idx_cntr++;
1868 csk->rss_qid = lldi->rxq_ids[rxq_idx];
1869 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1870 csk->snd_win = cxgb4i_snd_win;
1871 csk->rcv_win = cxgb4i_rcv_win;
1872 if (cxgb4i_rcv_win <= 0) {
1873 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1874 rcv_winf = linkspeed / SPEED_10000;
1875 if (rcv_winf)
1876 csk->rcv_win *= rcv_winf;
1877 }
1878 if (cxgb4i_snd_win <= 0) {
1879 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1880 snd_winf = linkspeed / SPEED_10000;
1881 if (snd_winf)
1882 csk->snd_win *= snd_winf;
1883 }
1884 csk->wr_cred = lldi->wr_cred -
1885 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1886 csk->wr_max_cred = csk->wr_cred;
1887 csk->wr_una_cred = 0;
1888 cxgbi_sock_reset_wr_list(csk);
1889 csk->err = 0;
1890
1891 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1892 (&csk->saddr), (&csk->daddr), csk, csk->state,
1893 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1894 csk->mtu, csk->mss_idx, csk->smac_idx);
1895
1896 /* must wait for either a act_open_rpl or act_open_establish */
1897 if (!try_module_get(cdev->owner)) {
1898 pr_err("%s, try_module_get failed.\n", ndev->name);
1899 goto rel_resource;
1900 }
1901
1902 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1903 if (csk->csk_family == AF_INET)
1904 send_act_open_req(csk, skb, csk->l2t);
1905 #if IS_ENABLED(CONFIG_IPV6)
1906 else
1907 send_act_open_req6(csk, skb, csk->l2t);
1908 #endif
1909 neigh_release(n);
1910
1911 return 0;
1912
1913 rel_resource:
1914 #if IS_ENABLED(CONFIG_IPV6)
1915 if (csk->csk_family == AF_INET6)
1916 cxgb4_clip_release(ndev,
1917 (const u32 *)&csk->saddr6.sin6_addr, 1);
1918 #endif
1919 rel_resource_without_clip:
1920 if (n)
1921 neigh_release(n);
1922 if (skb)
1923 __kfree_skb(skb);
1924 return -EINVAL;
1925 }
1926
1927 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1928 [CPL_ACT_ESTABLISH] = do_act_establish,
1929 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1930 [CPL_PEER_CLOSE] = do_peer_close,
1931 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1932 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1933 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1934 [CPL_FW4_ACK] = do_fw4_ack,
1935 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1936 [CPL_ISCSI_DATA] = do_rx_iscsi_data,
1937 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1938 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1939 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1940 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
1941 [CPL_RX_DATA] = do_rx_data,
1942 };
1943
1944 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1945 {
1946 int rc;
1947
1948 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1949 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1950
1951 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1952 cxgb4i_max_connect);
1953 if (rc < 0)
1954 return rc;
1955
1956 cdev->csk_release_offload_resources = release_offload_resources;
1957 cdev->csk_push_tx_frames = push_tx_frames;
1958 cdev->csk_send_abort_req = send_abort_req;
1959 cdev->csk_send_close_req = send_close_req;
1960 cdev->csk_send_rx_credits = send_rx_credits;
1961 cdev->csk_alloc_cpls = alloc_cpls;
1962 cdev->csk_init_act_open = init_act_open;
1963
1964 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1965 return 0;
1966 }
1967
1968 static inline void
1969 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1970 struct ulp_mem_io *req,
1971 unsigned int wr_len, unsigned int dlen,
1972 unsigned int pm_addr,
1973 int tid)
1974 {
1975 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1976 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1977
1978 INIT_ULPTX_WR(req, wr_len, 0, tid);
1979 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1980 FW_WR_ATOMIC_V(0));
1981 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1982 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1983 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1984 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1985 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1986 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1987
1988 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1989 idata->len = htonl(dlen);
1990 }
1991
1992 static struct sk_buff *
1993 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1994 struct cxgbi_ppm *ppm,
1995 unsigned int idx, unsigned int npods,
1996 unsigned int tid)
1997 {
1998 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1999 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
2000 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
2001 sizeof(struct ulptx_idata) + dlen, 16);
2002 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
2003
2004 if (!skb) {
2005 pr_err("%s: %s idx %u, npods %u, OOM.\n",
2006 __func__, ppm->ndev->name, idx, npods);
2007 return NULL;
2008 }
2009
2010 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
2011 pm_addr, tid);
2012
2013 return skb;
2014 }
2015
2016 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
2017 struct cxgbi_task_tag_info *ttinfo,
2018 unsigned int idx, unsigned int npods,
2019 struct scatterlist **sg_pp,
2020 unsigned int *sg_off)
2021 {
2022 struct cxgbi_device *cdev = csk->cdev;
2023 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
2024 csk->tid);
2025 struct ulp_mem_io *req;
2026 struct ulptx_idata *idata;
2027 struct cxgbi_pagepod *ppod;
2028 int i;
2029
2030 if (!skb)
2031 return -ENOMEM;
2032
2033 req = (struct ulp_mem_io *)skb->head;
2034 idata = (struct ulptx_idata *)(req + 1);
2035 ppod = (struct cxgbi_pagepod *)(idata + 1);
2036
2037 for (i = 0; i < npods; i++, ppod++)
2038 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
2039
2040 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
2041 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
2042 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
2043
2044 spin_lock_bh(&csk->lock);
2045 cxgbi_sock_skb_entail(csk, skb);
2046 spin_unlock_bh(&csk->lock);
2047
2048 return 0;
2049 }
2050
2051 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
2052 struct cxgbi_task_tag_info *ttinfo)
2053 {
2054 unsigned int pidx = ttinfo->idx;
2055 unsigned int npods = ttinfo->npods;
2056 unsigned int i, cnt;
2057 int err = 0;
2058 struct scatterlist *sg = ttinfo->sgl;
2059 unsigned int offset = 0;
2060
2061 ttinfo->cid = csk->port_id;
2062
2063 for (i = 0; i < npods; i += cnt, pidx += cnt) {
2064 cnt = npods - i;
2065
2066 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
2067 cnt = ULPMEM_IDATA_MAX_NPPODS;
2068 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
2069 &sg, &offset);
2070 if (err < 0)
2071 break;
2072 }
2073
2074 return err;
2075 }
2076
2077 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
2078 int pg_idx)
2079 {
2080 struct sk_buff *skb;
2081 struct cpl_set_tcb_field *req;
2082
2083 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
2084 return 0;
2085
2086 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2087 if (!skb)
2088 return -ENOMEM;
2089
2090 /* set up ulp page size */
2091 req = (struct cpl_set_tcb_field *)skb->head;
2092 INIT_TP_WR(req, csk->tid);
2093 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
2094 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
2095 req->word_cookie = htons(0);
2096 req->mask = cpu_to_be64(0x3 << 8);
2097 req->val = cpu_to_be64(pg_idx << 8);
2098 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2099
2100 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2101 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
2102
2103 reinit_completion(&csk->cmpl);
2104 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2105 wait_for_completion(&csk->cmpl);
2106
2107 return csk->err;
2108 }
2109
2110 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
2111 int hcrc, int dcrc)
2112 {
2113 struct sk_buff *skb;
2114 struct cpl_set_tcb_field *req;
2115
2116 if (!hcrc && !dcrc)
2117 return 0;
2118
2119 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2120 if (!skb)
2121 return -ENOMEM;
2122
2123 csk->hcrc_len = (hcrc ? 4 : 0);
2124 csk->dcrc_len = (dcrc ? 4 : 0);
2125 /* set up ulp submode */
2126 req = (struct cpl_set_tcb_field *)skb->head;
2127 INIT_TP_WR(req, tid);
2128 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
2129 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
2130 req->word_cookie = htons(0);
2131 req->mask = cpu_to_be64(0x3 << 4);
2132 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
2133 (dcrc ? ULP_CRC_DATA : 0)) << 4);
2134 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2135
2136 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2137 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
2138
2139 reinit_completion(&csk->cmpl);
2140 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2141 wait_for_completion(&csk->cmpl);
2142
2143 return csk->err;
2144 }
2145
2146 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
2147 {
2148 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
2149 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
2150 }
2151
2152 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
2153 {
2154 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
2155 struct net_device *ndev = cdev->ports[0];
2156 struct cxgbi_tag_format tformat;
2157 int i, err;
2158
2159 if (!lldi->vr->iscsi.size) {
2160 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
2161 return -EACCES;
2162 }
2163
2164 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
2165
2166 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
2167 for (i = 0; i < 4; i++)
2168 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
2169 & 0xF;
2170 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
2171
2172 pr_info("iscsi_edram.start 0x%x iscsi_edram.size 0x%x",
2173 lldi->vr->ppod_edram.start, lldi->vr->ppod_edram.size);
2174
2175 err = cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat,
2176 lldi->vr->iscsi.size, lldi->iscsi_llimit,
2177 lldi->vr->iscsi.start, 2,
2178 lldi->vr->ppod_edram.start,
2179 lldi->vr->ppod_edram.size);
2180
2181 if (err < 0)
2182 return err;
2183
2184 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
2185 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
2186 cdev->csk_ddp_set_map = ddp_set_map;
2187 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2188 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2189 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2190 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2191 cdev->cdev2ppm = cdev2ppm;
2192
2193 return 0;
2194 }
2195
2196 static bool is_memfree(struct adapter *adap)
2197 {
2198 u32 io;
2199
2200 io = t4_read_reg(adap, MA_TARGET_MEM_ENABLE_A);
2201 if (is_t5(adap->params.chip)) {
2202 if ((io & EXT_MEM0_ENABLE_F) || (io & EXT_MEM1_ENABLE_F))
2203 return false;
2204 } else if (io & EXT_MEM_ENABLE_F) {
2205 return false;
2206 }
2207
2208 return true;
2209 }
2210
2211 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2212 {
2213 struct cxgbi_device *cdev;
2214 struct port_info *pi;
2215 struct net_device *ndev;
2216 struct adapter *adap;
2217 struct tid_info *t;
2218 u32 max_cmds = CXGB4I_SCSI_HOST_QDEPTH;
2219 u32 max_conn = CXGBI_MAX_CONN;
2220 int i, rc;
2221
2222 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2223 if (!cdev) {
2224 pr_info("t4 device 0x%p, register failed.\n", lldi);
2225 return NULL;
2226 }
2227 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2228 cdev, lldi->adapter_type, lldi->nports,
2229 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2230 lldi->nrxq, lldi->wr_cred);
2231 for (i = 0; i < lldi->nrxq; i++)
2232 log_debug(1 << CXGBI_DBG_DEV,
2233 "t4 0x%p, rxq id #%d: %u.\n",
2234 cdev, i, lldi->rxq_ids[i]);
2235
2236 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2237 cdev->flags = CXGBI_FLAG_DEV_T4;
2238 cdev->pdev = lldi->pdev;
2239 cdev->ports = lldi->ports;
2240 cdev->nports = lldi->nports;
2241 cdev->mtus = lldi->mtus;
2242 cdev->nmtus = NMTUS;
2243 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2244 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2245 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2246 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2247 cdev->itp = &cxgb4i_iscsi_transport;
2248 cdev->owner = THIS_MODULE;
2249
2250 cdev->pfvf = FW_PFVF_CMD_PFN_V(lldi->pf);
2251 pr_info("cdev 0x%p,%s, pfvf %u.\n",
2252 cdev, lldi->ports[0]->name, cdev->pfvf);
2253
2254 rc = cxgb4i_ddp_init(cdev);
2255 if (rc) {
2256 pr_info("t4 0x%p ddp init failed %d.\n", cdev, rc);
2257 goto err_out;
2258 }
2259
2260 ndev = cdev->ports[0];
2261 adap = netdev2adap(ndev);
2262 if (adap) {
2263 t = &adap->tids;
2264 if (t->ntids <= CXGBI_MAX_CONN)
2265 max_conn = t->ntids;
2266
2267 if (is_memfree(adap)) {
2268 cdev->flags |= CXGBI_FLAG_DEV_ISO_OFF;
2269 max_cmds = CXGB4I_SCSI_HOST_QDEPTH >> 2;
2270
2271 pr_info("%s: 0x%p, tid %u, SO adapter.\n",
2272 ndev->name, cdev, t->ntids);
2273 }
2274 } else {
2275 pr_info("%s, 0x%p, NO adapter struct.\n", ndev->name, cdev);
2276 }
2277
2278 /* ISO is enabled in T5/T6 firmware version >= 1.13.43.0 */
2279 if (!is_t4(lldi->adapter_type) &&
2280 (lldi->fw_vers >= 0x10d2b00) &&
2281 !(cdev->flags & CXGBI_FLAG_DEV_ISO_OFF))
2282 cdev->skb_iso_txhdr = sizeof(struct cpl_tx_data_iso);
2283
2284 rc = cxgb4i_ofld_init(cdev);
2285 if (rc) {
2286 pr_info("t4 0x%p ofld init failed.\n", cdev);
2287 goto err_out;
2288 }
2289
2290 cxgb4i_host_template.can_queue = max_cmds;
2291 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, max_conn,
2292 &cxgb4i_host_template, cxgb4i_stt);
2293 if (rc)
2294 goto err_out;
2295
2296 for (i = 0; i < cdev->nports; i++) {
2297 pi = netdev_priv(lldi->ports[i]);
2298 cdev->hbas[i]->port_id = pi->port_id;
2299 }
2300 return cdev;
2301
2302 err_out:
2303 cxgbi_device_unregister(cdev);
2304 return ERR_PTR(-ENOMEM);
2305 }
2306
2307 #define RX_PULL_LEN 128
2308 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2309 const struct pkt_gl *pgl)
2310 {
2311 const struct cpl_act_establish *rpl;
2312 struct sk_buff *skb;
2313 unsigned int opc;
2314 struct cxgbi_device *cdev = handle;
2315
2316 if (pgl == NULL) {
2317 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2318
2319 skb = alloc_wr(len, 0, GFP_ATOMIC);
2320 if (!skb)
2321 goto nomem;
2322 skb_copy_to_linear_data(skb, &rsp[1], len);
2323 } else {
2324 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2325 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2326 pgl->va, be64_to_cpu(*rsp),
2327 be64_to_cpu(*(u64 *)pgl->va),
2328 pgl->tot_len);
2329 return 0;
2330 }
2331 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2332 if (unlikely(!skb))
2333 goto nomem;
2334 }
2335
2336 rpl = (struct cpl_act_establish *)skb->data;
2337 opc = rpl->ot.opcode;
2338 log_debug(1 << CXGBI_DBG_TOE,
2339 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2340 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2341 if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {
2342 pr_err("No handler for opcode 0x%x.\n", opc);
2343 __kfree_skb(skb);
2344 } else
2345 cxgb4i_cplhandlers[opc](cdev, skb);
2346
2347 return 0;
2348 nomem:
2349 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2350 return 1;
2351 }
2352
2353 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2354 {
2355 struct cxgbi_device *cdev = handle;
2356
2357 switch (state) {
2358 case CXGB4_STATE_UP:
2359 pr_info("cdev 0x%p, UP.\n", cdev);
2360 break;
2361 case CXGB4_STATE_START_RECOVERY:
2362 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2363 /* close all connections */
2364 break;
2365 case CXGB4_STATE_DOWN:
2366 pr_info("cdev 0x%p, DOWN.\n", cdev);
2367 break;
2368 case CXGB4_STATE_DETACH:
2369 pr_info("cdev 0x%p, DETACH.\n", cdev);
2370 cxgbi_device_unregister(cdev);
2371 break;
2372 default:
2373 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2374 break;
2375 }
2376 return 0;
2377 }
2378
2379 #ifdef CONFIG_CHELSIO_T4_DCB
2380 static int
2381 cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val,
2382 void *data)
2383 {
2384 int i, port = 0xFF;
2385 struct net_device *ndev;
2386 struct cxgbi_device *cdev = NULL;
2387 struct dcb_app_type *iscsi_app = data;
2388 struct cxgbi_ports_map *pmap;
2389 u8 priority;
2390
2391 if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {
2392 if ((iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_STREAM) &&
2393 (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY))
2394 return NOTIFY_DONE;
2395
2396 priority = iscsi_app->app.priority;
2397 } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {
2398 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)
2399 return NOTIFY_DONE;
2400
2401 if (!iscsi_app->app.priority)
2402 return NOTIFY_DONE;
2403
2404 priority = ffs(iscsi_app->app.priority) - 1;
2405 } else {
2406 return NOTIFY_DONE;
2407 }
2408
2409 if (iscsi_app->app.protocol != 3260)
2410 return NOTIFY_DONE;
2411
2412 log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n",
2413 iscsi_app->ifindex, priority);
2414
2415 ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);
2416 if (!ndev)
2417 return NOTIFY_DONE;
2418
2419 cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port);
2420
2421 dev_put(ndev);
2422 if (!cdev)
2423 return NOTIFY_DONE;
2424
2425 pmap = &cdev->pmap;
2426
2427 for (i = 0; i < pmap->used; i++) {
2428 if (pmap->port_csk[i]) {
2429 struct cxgbi_sock *csk = pmap->port_csk[i];
2430
2431 if (csk->dcb_priority != priority) {
2432 iscsi_conn_failure(csk->user_data,
2433 ISCSI_ERR_CONN_FAILED);
2434 pr_info("Restarting iSCSI connection %p with "
2435 "priority %u->%u.\n", csk,
2436 csk->dcb_priority, priority);
2437 }
2438 }
2439 }
2440 return NOTIFY_OK;
2441 }
2442 #endif
2443
2444 static int __init cxgb4i_init_module(void)
2445 {
2446 int rc;
2447
2448 printk(KERN_INFO "%s", version);
2449
2450 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2451 if (rc < 0)
2452 return rc;
2453 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
2454
2455 #ifdef CONFIG_CHELSIO_T4_DCB
2456 pr_info("%s dcb enabled.\n", DRV_MODULE_NAME);
2457 register_dcbevent_notifier(&cxgb4_dcb_change);
2458 #endif
2459 return 0;
2460 }
2461
2462 static void __exit cxgb4i_exit_module(void)
2463 {
2464 #ifdef CONFIG_CHELSIO_T4_DCB
2465 unregister_dcbevent_notifier(&cxgb4_dcb_change);
2466 #endif
2467 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2468 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2469 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2470 }
2471
2472 module_init(cxgb4i_init_module);
2473 module_exit(cxgb4i_exit_module);
Kernel DRM miscellaneous fixes and cross-tree changes