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[mirror_ubuntu-artful-kernel.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 #define DRV_MODULE_NAME "cxgb4i"
39 #define DRV_MODULE_DESC "Chelsio T4-T6 iSCSI Driver"
40 #define DRV_MODULE_VERSION "0.9.5-ko"
41 #define DRV_MODULE_RELDATE "Apr. 2015"
42
43 static char version[] =
44 DRV_MODULE_DESC " " DRV_MODULE_NAME
45 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
46
47 MODULE_AUTHOR("Chelsio Communications, Inc.");
48 MODULE_DESCRIPTION(DRV_MODULE_DESC);
49 MODULE_VERSION(DRV_MODULE_VERSION);
50 MODULE_LICENSE("GPL");
51
52 module_param(dbg_level, uint, 0644);
53 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
54
55 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
56 static int cxgb4i_rcv_win = -1;
57 module_param(cxgb4i_rcv_win, int, 0644);
58 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
59
60 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
61 static int cxgb4i_snd_win = -1;
62 module_param(cxgb4i_snd_win, int, 0644);
63 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
64
65 static int cxgb4i_rx_credit_thres = 10 * 1024;
66 module_param(cxgb4i_rx_credit_thres, int, 0644);
67 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
68 "RX credits return threshold in bytes (default=10KB)");
69
70 static unsigned int cxgb4i_max_connect = (8 * 1024);
71 module_param(cxgb4i_max_connect, uint, 0644);
72 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
73
74 static unsigned short cxgb4i_sport_base = 20000;
75 module_param(cxgb4i_sport_base, ushort, 0644);
76 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
77
78 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
79
80 static void *t4_uld_add(const struct cxgb4_lld_info *);
81 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
82 static int t4_uld_state_change(void *, enum cxgb4_state state);
83 static inline int send_tx_flowc_wr(struct cxgbi_sock *);
84
85 static const struct cxgb4_uld_info cxgb4i_uld_info = {
86 .name = DRV_MODULE_NAME,
87 .nrxq = MAX_ULD_QSETS,
88 .ntxq = MAX_ULD_QSETS,
89 .rxq_size = 1024,
90 .lro = false,
91 .add = t4_uld_add,
92 .rx_handler = t4_uld_rx_handler,
93 .state_change = t4_uld_state_change,
94 };
95
96 static struct scsi_host_template cxgb4i_host_template = {
97 .module = THIS_MODULE,
98 .name = DRV_MODULE_NAME,
99 .proc_name = DRV_MODULE_NAME,
100 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
101 .queuecommand = iscsi_queuecommand,
102 .change_queue_depth = scsi_change_queue_depth,
103 .sg_tablesize = SG_ALL,
104 .max_sectors = 0xFFFF,
105 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
106 .eh_timed_out = iscsi_eh_cmd_timed_out,
107 .eh_abort_handler = iscsi_eh_abort,
108 .eh_device_reset_handler = iscsi_eh_device_reset,
109 .eh_target_reset_handler = iscsi_eh_recover_target,
110 .target_alloc = iscsi_target_alloc,
111 .use_clustering = DISABLE_CLUSTERING,
112 .this_id = -1,
113 .track_queue_depth = 1,
114 };
115
116 static struct iscsi_transport cxgb4i_iscsi_transport = {
117 .owner = THIS_MODULE,
118 .name = DRV_MODULE_NAME,
119 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
120 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
121 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
122 .attr_is_visible = cxgbi_attr_is_visible,
123 .get_host_param = cxgbi_get_host_param,
124 .set_host_param = cxgbi_set_host_param,
125 /* session management */
126 .create_session = cxgbi_create_session,
127 .destroy_session = cxgbi_destroy_session,
128 .get_session_param = iscsi_session_get_param,
129 /* connection management */
130 .create_conn = cxgbi_create_conn,
131 .bind_conn = cxgbi_bind_conn,
132 .destroy_conn = iscsi_tcp_conn_teardown,
133 .start_conn = iscsi_conn_start,
134 .stop_conn = iscsi_conn_stop,
135 .get_conn_param = iscsi_conn_get_param,
136 .set_param = cxgbi_set_conn_param,
137 .get_stats = cxgbi_get_conn_stats,
138 /* pdu xmit req from user space */
139 .send_pdu = iscsi_conn_send_pdu,
140 /* task */
141 .init_task = iscsi_tcp_task_init,
142 .xmit_task = iscsi_tcp_task_xmit,
143 .cleanup_task = cxgbi_cleanup_task,
144 /* pdu */
145 .alloc_pdu = cxgbi_conn_alloc_pdu,
146 .init_pdu = cxgbi_conn_init_pdu,
147 .xmit_pdu = cxgbi_conn_xmit_pdu,
148 .parse_pdu_itt = cxgbi_parse_pdu_itt,
149 /* TCP connect/disconnect */
150 .get_ep_param = cxgbi_get_ep_param,
151 .ep_connect = cxgbi_ep_connect,
152 .ep_poll = cxgbi_ep_poll,
153 .ep_disconnect = cxgbi_ep_disconnect,
154 /* Error recovery timeout call */
155 .session_recovery_timedout = iscsi_session_recovery_timedout,
156 };
157
158 static struct scsi_transport_template *cxgb4i_stt;
159
160 /*
161 * CPL (Chelsio Protocol Language) defines a message passing interface between
162 * the host driver and Chelsio asic.
163 * The section below implments CPLs that related to iscsi tcp connection
164 * open/close/abort and data send/receive.
165 */
166
167 #define RCV_BUFSIZ_MASK 0x3FFU
168 #define MAX_IMM_TX_PKT_LEN 256
169
170 static int push_tx_frames(struct cxgbi_sock *, int);
171
172 /*
173 * is_ofld_imm - check whether a packet can be sent as immediate data
174 * @skb: the packet
175 *
176 * Returns true if a packet can be sent as an offload WR with immediate
177 * data. We currently use the same limit as for Ethernet packets.
178 */
179 static inline bool is_ofld_imm(const struct sk_buff *skb)
180 {
181 int len = skb->len;
182
183 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
184 len += sizeof(struct fw_ofld_tx_data_wr);
185
186 return len <= MAX_IMM_TX_PKT_LEN;
187 }
188
189 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
190 struct l2t_entry *e)
191 {
192 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
193 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
194 unsigned long long opt0;
195 unsigned int opt2;
196 unsigned int qid_atid = ((unsigned int)csk->atid) |
197 (((unsigned int)csk->rss_qid) << 14);
198
199 opt0 = KEEP_ALIVE_F |
200 WND_SCALE_V(wscale) |
201 MSS_IDX_V(csk->mss_idx) |
202 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
203 TX_CHAN_V(csk->tx_chan) |
204 SMAC_SEL_V(csk->smac_idx) |
205 ULP_MODE_V(ULP_MODE_ISCSI) |
206 RCV_BUFSIZ_V(csk->rcv_win >> 10);
207
208 opt2 = RX_CHANNEL_V(0) |
209 RSS_QUEUE_VALID_F |
210 RSS_QUEUE_V(csk->rss_qid);
211
212 if (is_t4(lldi->adapter_type)) {
213 struct cpl_act_open_req *req =
214 (struct cpl_act_open_req *)skb->head;
215
216 INIT_TP_WR(req, 0);
217 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
218 qid_atid));
219 req->local_port = csk->saddr.sin_port;
220 req->peer_port = csk->daddr.sin_port;
221 req->local_ip = csk->saddr.sin_addr.s_addr;
222 req->peer_ip = csk->daddr.sin_addr.s_addr;
223 req->opt0 = cpu_to_be64(opt0);
224 req->params = cpu_to_be32(cxgb4_select_ntuple(
225 csk->cdev->ports[csk->port_id],
226 csk->l2t));
227 opt2 |= RX_FC_VALID_F;
228 req->opt2 = cpu_to_be32(opt2);
229
230 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
231 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
232 csk, &req->local_ip, ntohs(req->local_port),
233 &req->peer_ip, ntohs(req->peer_port),
234 csk->atid, csk->rss_qid);
235 } else if (is_t5(lldi->adapter_type)) {
236 struct cpl_t5_act_open_req *req =
237 (struct cpl_t5_act_open_req *)skb->head;
238 u32 isn = (prandom_u32() & ~7UL) - 1;
239
240 INIT_TP_WR(req, 0);
241 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
242 qid_atid));
243 req->local_port = csk->saddr.sin_port;
244 req->peer_port = csk->daddr.sin_port;
245 req->local_ip = csk->saddr.sin_addr.s_addr;
246 req->peer_ip = csk->daddr.sin_addr.s_addr;
247 req->opt0 = cpu_to_be64(opt0);
248 req->params = cpu_to_be64(FILTER_TUPLE_V(
249 cxgb4_select_ntuple(
250 csk->cdev->ports[csk->port_id],
251 csk->l2t)));
252 req->rsvd = cpu_to_be32(isn);
253 opt2 |= T5_ISS_VALID;
254 opt2 |= T5_OPT_2_VALID_F;
255
256 req->opt2 = cpu_to_be32(opt2);
257
258 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
259 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
260 csk, &req->local_ip, ntohs(req->local_port),
261 &req->peer_ip, ntohs(req->peer_port),
262 csk->atid, csk->rss_qid);
263 } else {
264 struct cpl_t6_act_open_req *req =
265 (struct cpl_t6_act_open_req *)skb->head;
266 u32 isn = (prandom_u32() & ~7UL) - 1;
267
268 INIT_TP_WR(req, 0);
269 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
270 qid_atid));
271 req->local_port = csk->saddr.sin_port;
272 req->peer_port = csk->daddr.sin_port;
273 req->local_ip = csk->saddr.sin_addr.s_addr;
274 req->peer_ip = csk->daddr.sin_addr.s_addr;
275 req->opt0 = cpu_to_be64(opt0);
276 req->params = cpu_to_be64(FILTER_TUPLE_V(
277 cxgb4_select_ntuple(
278 csk->cdev->ports[csk->port_id],
279 csk->l2t)));
280 req->rsvd = cpu_to_be32(isn);
281
282 opt2 |= T5_ISS_VALID;
283 opt2 |= RX_FC_DISABLE_F;
284 opt2 |= T5_OPT_2_VALID_F;
285
286 req->opt2 = cpu_to_be32(opt2);
287 req->rsvd2 = cpu_to_be32(0);
288 req->opt3 = cpu_to_be32(0);
289
290 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
291 "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
292 csk, &req->local_ip, ntohs(req->local_port),
293 &req->peer_ip, ntohs(req->peer_port),
294 csk->atid, csk->rss_qid);
295 }
296
297 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
298
299 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
300 (&csk->saddr), (&csk->daddr),
301 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
302 csk->state, csk->flags, csk->atid, csk->rss_qid);
303
304 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
305 }
306
307 #if IS_ENABLED(CONFIG_IPV6)
308 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
309 struct l2t_entry *e)
310 {
311 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
312 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
313 unsigned long long opt0;
314 unsigned int opt2;
315 unsigned int qid_atid = ((unsigned int)csk->atid) |
316 (((unsigned int)csk->rss_qid) << 14);
317
318 opt0 = KEEP_ALIVE_F |
319 WND_SCALE_V(wscale) |
320 MSS_IDX_V(csk->mss_idx) |
321 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
322 TX_CHAN_V(csk->tx_chan) |
323 SMAC_SEL_V(csk->smac_idx) |
324 ULP_MODE_V(ULP_MODE_ISCSI) |
325 RCV_BUFSIZ_V(csk->rcv_win >> 10);
326
327 opt2 = RX_CHANNEL_V(0) |
328 RSS_QUEUE_VALID_F |
329 RSS_QUEUE_V(csk->rss_qid);
330
331 if (is_t4(lldi->adapter_type)) {
332 struct cpl_act_open_req6 *req =
333 (struct cpl_act_open_req6 *)skb->head;
334
335 INIT_TP_WR(req, 0);
336 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
337 qid_atid));
338 req->local_port = csk->saddr6.sin6_port;
339 req->peer_port = csk->daddr6.sin6_port;
340
341 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
342 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
343 8);
344 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
345 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
346 8);
347
348 req->opt0 = cpu_to_be64(opt0);
349
350 opt2 |= RX_FC_VALID_F;
351 req->opt2 = cpu_to_be32(opt2);
352
353 req->params = cpu_to_be32(cxgb4_select_ntuple(
354 csk->cdev->ports[csk->port_id],
355 csk->l2t));
356 } else if (is_t5(lldi->adapter_type)) {
357 struct cpl_t5_act_open_req6 *req =
358 (struct cpl_t5_act_open_req6 *)skb->head;
359
360 INIT_TP_WR(req, 0);
361 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
362 qid_atid));
363 req->local_port = csk->saddr6.sin6_port;
364 req->peer_port = csk->daddr6.sin6_port;
365 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
366 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
367 8);
368 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
369 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
370 8);
371 req->opt0 = cpu_to_be64(opt0);
372
373 opt2 |= T5_OPT_2_VALID_F;
374 req->opt2 = cpu_to_be32(opt2);
375
376 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
377 csk->cdev->ports[csk->port_id],
378 csk->l2t)));
379 } else {
380 struct cpl_t6_act_open_req6 *req =
381 (struct cpl_t6_act_open_req6 *)skb->head;
382
383 INIT_TP_WR(req, 0);
384 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
385 qid_atid));
386 req->local_port = csk->saddr6.sin6_port;
387 req->peer_port = csk->daddr6.sin6_port;
388 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
389 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
390 8);
391 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
392 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
393 8);
394 req->opt0 = cpu_to_be64(opt0);
395
396 opt2 |= RX_FC_DISABLE_F;
397 opt2 |= T5_OPT_2_VALID_F;
398
399 req->opt2 = cpu_to_be32(opt2);
400
401 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
402 csk->cdev->ports[csk->port_id],
403 csk->l2t)));
404
405 req->rsvd2 = cpu_to_be32(0);
406 req->opt3 = cpu_to_be32(0);
407 }
408
409 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
410
411 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
412 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
413 csk->flags, csk->atid,
414 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
415 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
416 csk->rss_qid);
417
418 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
419 }
420 #endif
421
422 static void send_close_req(struct cxgbi_sock *csk)
423 {
424 struct sk_buff *skb = csk->cpl_close;
425 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
426 unsigned int tid = csk->tid;
427
428 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
429 "csk 0x%p,%u,0x%lx, tid %u.\n",
430 csk, csk->state, csk->flags, csk->tid);
431 csk->cpl_close = NULL;
432 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
433 INIT_TP_WR(req, tid);
434 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
435 req->rsvd = 0;
436
437 cxgbi_sock_skb_entail(csk, skb);
438 if (csk->state >= CTP_ESTABLISHED)
439 push_tx_frames(csk, 1);
440 }
441
442 static void abort_arp_failure(void *handle, struct sk_buff *skb)
443 {
444 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
445 struct cpl_abort_req *req;
446
447 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
448 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
449 csk, csk->state, csk->flags, csk->tid);
450 req = (struct cpl_abort_req *)skb->data;
451 req->cmd = CPL_ABORT_NO_RST;
452 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
453 }
454
455 static void send_abort_req(struct cxgbi_sock *csk)
456 {
457 struct cpl_abort_req *req;
458 struct sk_buff *skb = csk->cpl_abort_req;
459
460 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
461 return;
462
463 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
464 send_tx_flowc_wr(csk);
465 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
466 }
467
468 cxgbi_sock_set_state(csk, CTP_ABORTING);
469 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
470 cxgbi_sock_purge_write_queue(csk);
471
472 csk->cpl_abort_req = NULL;
473 req = (struct cpl_abort_req *)skb->head;
474 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
475 req->cmd = CPL_ABORT_SEND_RST;
476 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
477 INIT_TP_WR(req, csk->tid);
478 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
479 req->rsvd0 = htonl(csk->snd_nxt);
480 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
481
482 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
483 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
484 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
485 req->rsvd1);
486
487 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
488 }
489
490 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
491 {
492 struct sk_buff *skb = csk->cpl_abort_rpl;
493 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
494
495 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
496 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
497 csk, csk->state, csk->flags, csk->tid, rst_status);
498
499 csk->cpl_abort_rpl = NULL;
500 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
501 INIT_TP_WR(rpl, csk->tid);
502 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
503 rpl->cmd = rst_status;
504 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
505 }
506
507 /*
508 * CPL connection rx data ack: host ->
509 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
510 * credits sent.
511 */
512 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
513 {
514 struct sk_buff *skb;
515 struct cpl_rx_data_ack *req;
516
517 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
518 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
519 csk, csk->state, csk->flags, csk->tid, credits);
520
521 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
522 if (!skb) {
523 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
524 return 0;
525 }
526 req = (struct cpl_rx_data_ack *)skb->head;
527
528 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
529 INIT_TP_WR(req, csk->tid);
530 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
531 csk->tid));
532 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
533 | RX_FORCE_ACK_F);
534 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
535 return credits;
536 }
537
538 /*
539 * sgl_len - calculates the size of an SGL of the given capacity
540 * @n: the number of SGL entries
541 * Calculates the number of flits needed for a scatter/gather list that
542 * can hold the given number of entries.
543 */
544 static inline unsigned int sgl_len(unsigned int n)
545 {
546 n--;
547 return (3 * n) / 2 + (n & 1) + 2;
548 }
549
550 /*
551 * calc_tx_flits_ofld - calculate # of flits for an offload packet
552 * @skb: the packet
553 *
554 * Returns the number of flits needed for the given offload packet.
555 * These packets are already fully constructed and no additional headers
556 * will be added.
557 */
558 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
559 {
560 unsigned int flits, cnt;
561
562 if (is_ofld_imm(skb))
563 return DIV_ROUND_UP(skb->len, 8);
564 flits = skb_transport_offset(skb) / 8;
565 cnt = skb_shinfo(skb)->nr_frags;
566 if (skb_tail_pointer(skb) != skb_transport_header(skb))
567 cnt++;
568 return flits + sgl_len(cnt);
569 }
570
571 #define FLOWC_WR_NPARAMS_MIN 9
572 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
573 {
574 int nparams, flowclen16, flowclen;
575
576 nparams = FLOWC_WR_NPARAMS_MIN;
577 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
578 flowclen16 = DIV_ROUND_UP(flowclen, 16);
579 flowclen = flowclen16 * 16;
580 /*
581 * Return the number of 16-byte credits used by the FlowC request.
582 * Pass back the nparams and actual FlowC length if requested.
583 */
584 if (nparamsp)
585 *nparamsp = nparams;
586 if (flowclenp)
587 *flowclenp = flowclen;
588
589 return flowclen16;
590 }
591
592 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
593 {
594 struct sk_buff *skb;
595 struct fw_flowc_wr *flowc;
596 int nparams, flowclen16, flowclen;
597
598 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
599 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
600 flowc = (struct fw_flowc_wr *)skb->head;
601 flowc->op_to_nparams =
602 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
603 flowc->flowid_len16 =
604 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
605 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
606 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
607 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
608 flowc->mnemval[1].val = htonl(csk->tx_chan);
609 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
610 flowc->mnemval[2].val = htonl(csk->tx_chan);
611 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
612 flowc->mnemval[3].val = htonl(csk->rss_qid);
613 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
614 flowc->mnemval[4].val = htonl(csk->snd_nxt);
615 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
616 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
617 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
618 flowc->mnemval[6].val = htonl(csk->snd_win);
619 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
620 flowc->mnemval[7].val = htonl(csk->advmss);
621 flowc->mnemval[8].mnemonic = 0;
622 flowc->mnemval[8].val = 0;
623 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
624 flowc->mnemval[8].val = 16384;
625
626 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
627
628 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
629 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
630 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
631 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
632 csk->advmss);
633
634 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
635
636 return flowclen16;
637 }
638
639 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
640 int dlen, int len, u32 credits, int compl)
641 {
642 struct fw_ofld_tx_data_wr *req;
643 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
644 unsigned int wr_ulp_mode = 0, val;
645 bool imm = is_ofld_imm(skb);
646
647 req = __skb_push(skb, sizeof(*req));
648
649 if (imm) {
650 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
651 FW_WR_COMPL_F |
652 FW_WR_IMMDLEN_V(dlen));
653 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
654 FW_WR_LEN16_V(credits));
655 } else {
656 req->op_to_immdlen =
657 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
658 FW_WR_COMPL_F |
659 FW_WR_IMMDLEN_V(0));
660 req->flowid_len16 =
661 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
662 FW_WR_LEN16_V(credits));
663 }
664 if (submode)
665 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
666 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
667 val = skb_peek(&csk->write_queue) ? 0 : 1;
668 req->tunnel_to_proxy = htonl(wr_ulp_mode |
669 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
670 req->plen = htonl(len);
671 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
672 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
673 }
674
675 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
676 {
677 kfree_skb(skb);
678 }
679
680 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
681 {
682 int total_size = 0;
683 struct sk_buff *skb;
684
685 if (unlikely(csk->state < CTP_ESTABLISHED ||
686 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
687 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
688 1 << CXGBI_DBG_PDU_TX,
689 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
690 csk, csk->state, csk->flags, csk->tid);
691 return 0;
692 }
693
694 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
695 int dlen = skb->len;
696 int len = skb->len;
697 unsigned int credits_needed;
698 int flowclen16 = 0;
699
700 skb_reset_transport_header(skb);
701 if (is_ofld_imm(skb))
702 credits_needed = DIV_ROUND_UP(dlen, 16);
703 else
704 credits_needed = DIV_ROUND_UP(
705 8 * calc_tx_flits_ofld(skb),
706 16);
707
708 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
709 credits_needed += DIV_ROUND_UP(
710 sizeof(struct fw_ofld_tx_data_wr),
711 16);
712
713 /*
714 * Assumes the initial credits is large enough to support
715 * fw_flowc_wr plus largest possible first payload
716 */
717 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
718 flowclen16 = send_tx_flowc_wr(csk);
719 csk->wr_cred -= flowclen16;
720 csk->wr_una_cred += flowclen16;
721 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
722 }
723
724 if (csk->wr_cred < credits_needed) {
725 log_debug(1 << CXGBI_DBG_PDU_TX,
726 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
727 csk, skb->len, skb->data_len,
728 credits_needed, csk->wr_cred);
729 break;
730 }
731 __skb_unlink(skb, &csk->write_queue);
732 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
733 skb->csum = credits_needed + flowclen16;
734 csk->wr_cred -= credits_needed;
735 csk->wr_una_cred += credits_needed;
736 cxgbi_sock_enqueue_wr(csk, skb);
737
738 log_debug(1 << CXGBI_DBG_PDU_TX,
739 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
740 csk, skb->len, skb->data_len, credits_needed,
741 csk->wr_cred, csk->wr_una_cred);
742
743 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
744 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
745 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
746 req_completion);
747 csk->snd_nxt += len;
748 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
749 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
750 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
751 struct cpl_close_con_req *req =
752 (struct cpl_close_con_req *)skb->data;
753 req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
754 }
755 total_size += skb->truesize;
756 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
757
758 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
759 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
760 csk, csk->state, csk->flags, csk->tid, skb, len);
761
762 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
763 }
764 return total_size;
765 }
766
767 static inline void free_atid(struct cxgbi_sock *csk)
768 {
769 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
770
771 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
772 cxgb4_free_atid(lldi->tids, csk->atid);
773 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
774 cxgbi_sock_put(csk);
775 }
776 }
777
778 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
779 {
780 struct cxgbi_sock *csk;
781 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
782 unsigned short tcp_opt = ntohs(req->tcp_opt);
783 unsigned int tid = GET_TID(req);
784 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
785 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
786 struct tid_info *t = lldi->tids;
787 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
788
789 csk = lookup_atid(t, atid);
790 if (unlikely(!csk)) {
791 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
792 goto rel_skb;
793 }
794
795 if (csk->atid != atid) {
796 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
797 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
798 goto rel_skb;
799 }
800
801 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
802 (&csk->saddr), (&csk->daddr),
803 atid, tid, csk, csk->state, csk->flags, rcv_isn);
804
805 module_put(cdev->owner);
806
807 cxgbi_sock_get(csk);
808 csk->tid = tid;
809 cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);
810 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
811
812 free_atid(csk);
813
814 spin_lock_bh(&csk->lock);
815 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
816 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
817 csk, csk->state, csk->flags, csk->tid);
818
819 if (csk->retry_timer.function) {
820 del_timer(&csk->retry_timer);
821 csk->retry_timer.function = NULL;
822 }
823
824 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
825 /*
826 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
827 * pass through opt0.
828 */
829 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
830 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
831
832 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
833 if (TCPOPT_TSTAMP_G(tcp_opt))
834 csk->advmss -= 12;
835 if (csk->advmss < 128)
836 csk->advmss = 128;
837
838 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
839 "csk 0x%p, mss_idx %u, advmss %u.\n",
840 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
841
842 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
843
844 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
845 send_abort_req(csk);
846 else {
847 if (skb_queue_len(&csk->write_queue))
848 push_tx_frames(csk, 0);
849 cxgbi_conn_tx_open(csk);
850 }
851 spin_unlock_bh(&csk->lock);
852
853 rel_skb:
854 __kfree_skb(skb);
855 }
856
857 static int act_open_rpl_status_to_errno(int status)
858 {
859 switch (status) {
860 case CPL_ERR_CONN_RESET:
861 return -ECONNREFUSED;
862 case CPL_ERR_ARP_MISS:
863 return -EHOSTUNREACH;
864 case CPL_ERR_CONN_TIMEDOUT:
865 return -ETIMEDOUT;
866 case CPL_ERR_TCAM_FULL:
867 return -ENOMEM;
868 case CPL_ERR_CONN_EXIST:
869 return -EADDRINUSE;
870 default:
871 return -EIO;
872 }
873 }
874
875 static void csk_act_open_retry_timer(unsigned long data)
876 {
877 struct sk_buff *skb = NULL;
878 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
879 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
880 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
881 struct l2t_entry *);
882 int t4 = is_t4(lldi->adapter_type), size, size6;
883
884 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
885 "csk 0x%p,%u,0x%lx,%u.\n",
886 csk, csk->state, csk->flags, csk->tid);
887
888 cxgbi_sock_get(csk);
889 spin_lock_bh(&csk->lock);
890
891 if (t4) {
892 size = sizeof(struct cpl_act_open_req);
893 size6 = sizeof(struct cpl_act_open_req6);
894 } else {
895 size = sizeof(struct cpl_t5_act_open_req);
896 size6 = sizeof(struct cpl_t5_act_open_req6);
897 }
898
899 if (csk->csk_family == AF_INET) {
900 send_act_open_func = send_act_open_req;
901 skb = alloc_wr(size, 0, GFP_ATOMIC);
902 #if IS_ENABLED(CONFIG_IPV6)
903 } else {
904 send_act_open_func = send_act_open_req6;
905 skb = alloc_wr(size6, 0, GFP_ATOMIC);
906 #endif
907 }
908
909 if (!skb)
910 cxgbi_sock_fail_act_open(csk, -ENOMEM);
911 else {
912 skb->sk = (struct sock *)csk;
913 t4_set_arp_err_handler(skb, csk,
914 cxgbi_sock_act_open_req_arp_failure);
915 send_act_open_func(csk, skb, csk->l2t);
916 }
917
918 spin_unlock_bh(&csk->lock);
919 cxgbi_sock_put(csk);
920
921 }
922
923 static inline bool is_neg_adv(unsigned int status)
924 {
925 return status == CPL_ERR_RTX_NEG_ADVICE ||
926 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
927 status == CPL_ERR_PERSIST_NEG_ADVICE;
928 }
929
930 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
931 {
932 struct cxgbi_sock *csk;
933 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
934 unsigned int tid = GET_TID(rpl);
935 unsigned int atid =
936 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
937 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
938 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
939 struct tid_info *t = lldi->tids;
940
941 csk = lookup_atid(t, atid);
942 if (unlikely(!csk)) {
943 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
944 goto rel_skb;
945 }
946
947 pr_info_ipaddr("tid %u/%u, status %u.\n"
948 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
949 atid, tid, status, csk, csk->state, csk->flags);
950
951 if (is_neg_adv(status))
952 goto rel_skb;
953
954 module_put(cdev->owner);
955
956 if (status && status != CPL_ERR_TCAM_FULL &&
957 status != CPL_ERR_CONN_EXIST &&
958 status != CPL_ERR_ARP_MISS)
959 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl),
960 csk->csk_family);
961
962 cxgbi_sock_get(csk);
963 spin_lock_bh(&csk->lock);
964
965 if (status == CPL_ERR_CONN_EXIST &&
966 csk->retry_timer.function != csk_act_open_retry_timer) {
967 csk->retry_timer.function = csk_act_open_retry_timer;
968 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
969 } else
970 cxgbi_sock_fail_act_open(csk,
971 act_open_rpl_status_to_errno(status));
972
973 spin_unlock_bh(&csk->lock);
974 cxgbi_sock_put(csk);
975 rel_skb:
976 __kfree_skb(skb);
977 }
978
979 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
980 {
981 struct cxgbi_sock *csk;
982 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
983 unsigned int tid = GET_TID(req);
984 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
985 struct tid_info *t = lldi->tids;
986
987 csk = lookup_tid(t, tid);
988 if (unlikely(!csk)) {
989 pr_err("can't find connection for tid %u.\n", tid);
990 goto rel_skb;
991 }
992 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
993 (&csk->saddr), (&csk->daddr),
994 csk, csk->state, csk->flags, csk->tid);
995 cxgbi_sock_rcv_peer_close(csk);
996 rel_skb:
997 __kfree_skb(skb);
998 }
999
1000 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1001 {
1002 struct cxgbi_sock *csk;
1003 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1004 unsigned int tid = GET_TID(rpl);
1005 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1006 struct tid_info *t = lldi->tids;
1007
1008 csk = lookup_tid(t, tid);
1009 if (unlikely(!csk)) {
1010 pr_err("can't find connection for tid %u.\n", tid);
1011 goto rel_skb;
1012 }
1013 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1014 (&csk->saddr), (&csk->daddr),
1015 csk, csk->state, csk->flags, csk->tid);
1016 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1017 rel_skb:
1018 __kfree_skb(skb);
1019 }
1020
1021 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1022 int *need_rst)
1023 {
1024 switch (abort_reason) {
1025 case CPL_ERR_BAD_SYN: /* fall through */
1026 case CPL_ERR_CONN_RESET:
1027 return csk->state > CTP_ESTABLISHED ?
1028 -EPIPE : -ECONNRESET;
1029 case CPL_ERR_XMIT_TIMEDOUT:
1030 case CPL_ERR_PERSIST_TIMEDOUT:
1031 case CPL_ERR_FINWAIT2_TIMEDOUT:
1032 case CPL_ERR_KEEPALIVE_TIMEDOUT:
1033 return -ETIMEDOUT;
1034 default:
1035 return -EIO;
1036 }
1037 }
1038
1039 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1040 {
1041 struct cxgbi_sock *csk;
1042 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1043 unsigned int tid = GET_TID(req);
1044 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1045 struct tid_info *t = lldi->tids;
1046 int rst_status = CPL_ABORT_NO_RST;
1047
1048 csk = lookup_tid(t, tid);
1049 if (unlikely(!csk)) {
1050 pr_err("can't find connection for tid %u.\n", tid);
1051 goto rel_skb;
1052 }
1053
1054 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1055 (&csk->saddr), (&csk->daddr),
1056 csk, csk->state, csk->flags, csk->tid, req->status);
1057
1058 if (is_neg_adv(req->status))
1059 goto rel_skb;
1060
1061 cxgbi_sock_get(csk);
1062 spin_lock_bh(&csk->lock);
1063
1064 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1065
1066 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1067 send_tx_flowc_wr(csk);
1068 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1069 }
1070
1071 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1072 cxgbi_sock_set_state(csk, CTP_ABORTING);
1073
1074 send_abort_rpl(csk, rst_status);
1075
1076 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1077 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1078 cxgbi_sock_closed(csk);
1079 }
1080
1081 spin_unlock_bh(&csk->lock);
1082 cxgbi_sock_put(csk);
1083 rel_skb:
1084 __kfree_skb(skb);
1085 }
1086
1087 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1088 {
1089 struct cxgbi_sock *csk;
1090 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1091 unsigned int tid = GET_TID(rpl);
1092 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1093 struct tid_info *t = lldi->tids;
1094
1095 csk = lookup_tid(t, tid);
1096 if (!csk)
1097 goto rel_skb;
1098
1099 if (csk)
1100 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1101 (&csk->saddr), (&csk->daddr), csk,
1102 csk->state, csk->flags, csk->tid, rpl->status);
1103
1104 if (rpl->status == CPL_ERR_ABORT_FAILED)
1105 goto rel_skb;
1106
1107 cxgbi_sock_rcv_abort_rpl(csk);
1108 rel_skb:
1109 __kfree_skb(skb);
1110 }
1111
1112 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1113 {
1114 struct cxgbi_sock *csk;
1115 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1116 unsigned int tid = GET_TID(cpl);
1117 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1118 struct tid_info *t = lldi->tids;
1119
1120 csk = lookup_tid(t, tid);
1121 if (!csk) {
1122 pr_err("can't find connection for tid %u.\n", tid);
1123 } else {
1124 /* not expecting this, reset the connection. */
1125 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1126 spin_lock_bh(&csk->lock);
1127 send_abort_req(csk);
1128 spin_unlock_bh(&csk->lock);
1129 }
1130 __kfree_skb(skb);
1131 }
1132
1133 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1134 {
1135 struct cxgbi_sock *csk;
1136 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1137 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1138 unsigned int tid = GET_TID(cpl);
1139 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1140 struct tid_info *t = lldi->tids;
1141
1142 csk = lookup_tid(t, tid);
1143 if (unlikely(!csk)) {
1144 pr_err("can't find conn. for tid %u.\n", tid);
1145 goto rel_skb;
1146 }
1147
1148 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1149 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1150 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1151 pdu_len_ddp);
1152
1153 spin_lock_bh(&csk->lock);
1154
1155 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1156 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1157 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1158 csk, csk->state, csk->flags, csk->tid);
1159 if (csk->state != CTP_ABORTING)
1160 goto abort_conn;
1161 else
1162 goto discard;
1163 }
1164
1165 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1166 cxgbi_skcb_flags(skb) = 0;
1167
1168 skb_reset_transport_header(skb);
1169 __skb_pull(skb, sizeof(*cpl));
1170 __pskb_trim(skb, ntohs(cpl->len));
1171
1172 if (!csk->skb_ulp_lhdr) {
1173 unsigned char *bhs;
1174 unsigned int hlen, dlen, plen;
1175
1176 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1177 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1178 csk, csk->state, csk->flags, csk->tid, skb);
1179 csk->skb_ulp_lhdr = skb;
1180 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1181
1182 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1183 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1184 csk->tid, cxgbi_skcb_tcp_seq(skb),
1185 csk->rcv_nxt);
1186 goto abort_conn;
1187 }
1188
1189 bhs = skb->data;
1190 hlen = ntohs(cpl->len);
1191 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1192
1193 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1194 if (is_t4(lldi->adapter_type))
1195 plen -= 40;
1196
1197 if ((hlen + dlen) != plen) {
1198 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1199 "mismatch %u != %u + %u, seq 0x%x.\n",
1200 csk->tid, plen, hlen, dlen,
1201 cxgbi_skcb_tcp_seq(skb));
1202 goto abort_conn;
1203 }
1204
1205 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1206 if (dlen)
1207 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1208 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1209
1210 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1211 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1212 csk, skb, *bhs, hlen, dlen,
1213 ntohl(*((unsigned int *)(bhs + 16))),
1214 ntohl(*((unsigned int *)(bhs + 24))));
1215
1216 } else {
1217 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1218
1219 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1220 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1221 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1222 csk, csk->state, csk->flags, skb, lskb);
1223 }
1224
1225 __skb_queue_tail(&csk->receive_queue, skb);
1226 spin_unlock_bh(&csk->lock);
1227 return;
1228
1229 abort_conn:
1230 send_abort_req(csk);
1231 discard:
1232 spin_unlock_bh(&csk->lock);
1233 rel_skb:
1234 __kfree_skb(skb);
1235 }
1236
1237 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1238 {
1239 struct cxgbi_sock *csk;
1240 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1241 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1242 struct tid_info *t = lldi->tids;
1243 struct sk_buff *lskb;
1244 u32 tid = GET_TID(cpl);
1245 u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1246
1247 csk = lookup_tid(t, tid);
1248 if (unlikely(!csk)) {
1249 pr_err("can't find conn. for tid %u.\n", tid);
1250 goto rel_skb;
1251 }
1252
1253 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1254 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1255 csk, csk->state, csk->flags, csk->tid, skb,
1256 skb->len, pdu_len_ddp);
1257
1258 spin_lock_bh(&csk->lock);
1259
1260 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1261 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1262 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1263 csk, csk->state, csk->flags, csk->tid);
1264
1265 if (csk->state != CTP_ABORTING)
1266 goto abort_conn;
1267 else
1268 goto discard;
1269 }
1270
1271 cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1272 cxgbi_skcb_flags(skb) = 0;
1273
1274 skb_reset_transport_header(skb);
1275 __skb_pull(skb, sizeof(*cpl));
1276 __pskb_trim(skb, ntohs(cpl->len));
1277
1278 if (!csk->skb_ulp_lhdr)
1279 csk->skb_ulp_lhdr = skb;
1280
1281 lskb = csk->skb_ulp_lhdr;
1282 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1283
1284 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1285 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1286 csk, csk->state, csk->flags, skb, lskb);
1287
1288 __skb_queue_tail(&csk->receive_queue, skb);
1289 spin_unlock_bh(&csk->lock);
1290 return;
1291
1292 abort_conn:
1293 send_abort_req(csk);
1294 discard:
1295 spin_unlock_bh(&csk->lock);
1296 rel_skb:
1297 __kfree_skb(skb);
1298 }
1299
1300 static void
1301 cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1302 struct sk_buff *skb, u32 ddpvld)
1303 {
1304 if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1305 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1306 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1307 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1308 }
1309
1310 if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1311 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1312 csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1313 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1314 }
1315
1316 if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1317 log_debug(1 << CXGBI_DBG_PDU_RX,
1318 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1319 csk, skb, ddpvld);
1320 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1321 }
1322
1323 if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1324 !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1325 log_debug(1 << CXGBI_DBG_PDU_RX,
1326 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1327 csk, skb, ddpvld);
1328 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1329 }
1330 }
1331
1332 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1333 struct sk_buff *skb)
1334 {
1335 struct cxgbi_sock *csk;
1336 struct sk_buff *lskb;
1337 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1338 unsigned int tid = GET_TID(rpl);
1339 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1340 struct tid_info *t = lldi->tids;
1341 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1342
1343 csk = lookup_tid(t, tid);
1344 if (unlikely(!csk)) {
1345 pr_err("can't find connection for tid %u.\n", tid);
1346 goto rel_skb;
1347 }
1348
1349 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1350 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1351 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1352
1353 spin_lock_bh(&csk->lock);
1354
1355 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1356 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1357 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1358 csk, csk->state, csk->flags, csk->tid);
1359 if (csk->state != CTP_ABORTING)
1360 goto abort_conn;
1361 else
1362 goto discard;
1363 }
1364
1365 if (!csk->skb_ulp_lhdr) {
1366 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1367 goto abort_conn;
1368 }
1369
1370 lskb = csk->skb_ulp_lhdr;
1371 csk->skb_ulp_lhdr = NULL;
1372
1373 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1374
1375 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1376 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1377 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1378
1379 cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1380
1381 log_debug(1 << CXGBI_DBG_PDU_RX,
1382 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1383 csk, lskb, cxgbi_skcb_flags(lskb));
1384
1385 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1386 cxgbi_conn_pdu_ready(csk);
1387 spin_unlock_bh(&csk->lock);
1388 goto rel_skb;
1389
1390 abort_conn:
1391 send_abort_req(csk);
1392 discard:
1393 spin_unlock_bh(&csk->lock);
1394 rel_skb:
1395 __kfree_skb(skb);
1396 }
1397
1398 static void
1399 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1400 {
1401 struct cxgbi_sock *csk;
1402 struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1403 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1404 struct tid_info *t = lldi->tids;
1405 struct sk_buff *data_skb = NULL;
1406 u32 tid = GET_TID(rpl);
1407 u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1408 u32 seq = be32_to_cpu(rpl->seq);
1409 u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1410
1411 csk = lookup_tid(t, tid);
1412 if (unlikely(!csk)) {
1413 pr_err("can't find connection for tid %u.\n", tid);
1414 goto rel_skb;
1415 }
1416
1417 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1418 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1419 "pdu_len_ddp %u, status %u.\n",
1420 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1421 ntohs(rpl->len), pdu_len_ddp, rpl->status);
1422
1423 spin_lock_bh(&csk->lock);
1424
1425 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1426 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1427 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1428 csk, csk->state, csk->flags, csk->tid);
1429
1430 if (csk->state != CTP_ABORTING)
1431 goto abort_conn;
1432 else
1433 goto discard;
1434 }
1435
1436 cxgbi_skcb_tcp_seq(skb) = seq;
1437 cxgbi_skcb_flags(skb) = 0;
1438 cxgbi_skcb_rx_pdulen(skb) = 0;
1439
1440 skb_reset_transport_header(skb);
1441 __skb_pull(skb, sizeof(*rpl));
1442 __pskb_trim(skb, be16_to_cpu(rpl->len));
1443
1444 csk->rcv_nxt = seq + pdu_len_ddp;
1445
1446 if (csk->skb_ulp_lhdr) {
1447 data_skb = skb_peek(&csk->receive_queue);
1448 if (!data_skb ||
1449 !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1450 pr_err("Error! freelist data not found 0x%p, tid %u\n",
1451 data_skb, tid);
1452
1453 goto abort_conn;
1454 }
1455 __skb_unlink(data_skb, &csk->receive_queue);
1456
1457 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1458
1459 __skb_queue_tail(&csk->receive_queue, skb);
1460 __skb_queue_tail(&csk->receive_queue, data_skb);
1461 } else {
1462 __skb_queue_tail(&csk->receive_queue, skb);
1463 }
1464
1465 csk->skb_ulp_lhdr = NULL;
1466
1467 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1468 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1469 cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1470 cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1471
1472 cxgb4i_process_ddpvld(csk, skb, ddpvld);
1473
1474 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1475 csk, skb, cxgbi_skcb_flags(skb));
1476
1477 cxgbi_conn_pdu_ready(csk);
1478 spin_unlock_bh(&csk->lock);
1479
1480 return;
1481
1482 abort_conn:
1483 send_abort_req(csk);
1484 discard:
1485 spin_unlock_bh(&csk->lock);
1486 rel_skb:
1487 __kfree_skb(skb);
1488 }
1489
1490 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1491 {
1492 struct cxgbi_sock *csk;
1493 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1494 unsigned int tid = GET_TID(rpl);
1495 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1496 struct tid_info *t = lldi->tids;
1497
1498 csk = lookup_tid(t, tid);
1499 if (unlikely(!csk))
1500 pr_err("can't find connection for tid %u.\n", tid);
1501 else {
1502 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1503 "csk 0x%p,%u,0x%lx,%u.\n",
1504 csk, csk->state, csk->flags, csk->tid);
1505 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1506 rpl->seq_vld);
1507 }
1508 __kfree_skb(skb);
1509 }
1510
1511 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1512 {
1513 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1514 unsigned int tid = GET_TID(rpl);
1515 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1516 struct tid_info *t = lldi->tids;
1517 struct cxgbi_sock *csk;
1518
1519 csk = lookup_tid(t, tid);
1520 if (!csk)
1521 pr_err("can't find conn. for tid %u.\n", tid);
1522
1523 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1524 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1525 csk, csk->state, csk->flags, csk->tid, rpl->status);
1526
1527 if (rpl->status != CPL_ERR_NONE)
1528 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1529 csk, tid, rpl->status);
1530
1531 __kfree_skb(skb);
1532 }
1533
1534 static int alloc_cpls(struct cxgbi_sock *csk)
1535 {
1536 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1537 0, GFP_KERNEL);
1538 if (!csk->cpl_close)
1539 return -ENOMEM;
1540
1541 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1542 0, GFP_KERNEL);
1543 if (!csk->cpl_abort_req)
1544 goto free_cpls;
1545
1546 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1547 0, GFP_KERNEL);
1548 if (!csk->cpl_abort_rpl)
1549 goto free_cpls;
1550 return 0;
1551
1552 free_cpls:
1553 cxgbi_sock_free_cpl_skbs(csk);
1554 return -ENOMEM;
1555 }
1556
1557 static inline void l2t_put(struct cxgbi_sock *csk)
1558 {
1559 if (csk->l2t) {
1560 cxgb4_l2t_release(csk->l2t);
1561 csk->l2t = NULL;
1562 cxgbi_sock_put(csk);
1563 }
1564 }
1565
1566 static void release_offload_resources(struct cxgbi_sock *csk)
1567 {
1568 struct cxgb4_lld_info *lldi;
1569 #if IS_ENABLED(CONFIG_IPV6)
1570 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1571 #endif
1572
1573 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1574 "csk 0x%p,%u,0x%lx,%u.\n",
1575 csk, csk->state, csk->flags, csk->tid);
1576
1577 cxgbi_sock_free_cpl_skbs(csk);
1578 if (csk->wr_cred != csk->wr_max_cred) {
1579 cxgbi_sock_purge_wr_queue(csk);
1580 cxgbi_sock_reset_wr_list(csk);
1581 }
1582
1583 l2t_put(csk);
1584 #if IS_ENABLED(CONFIG_IPV6)
1585 if (csk->csk_family == AF_INET6)
1586 cxgb4_clip_release(ndev,
1587 (const u32 *)&csk->saddr6.sin6_addr, 1);
1588 #endif
1589
1590 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1591 free_atid(csk);
1592 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1593 lldi = cxgbi_cdev_priv(csk->cdev);
1594 cxgb4_remove_tid(lldi->tids, 0, csk->tid,
1595 csk->csk_family);
1596 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1597 cxgbi_sock_put(csk);
1598 }
1599 csk->dst = NULL;
1600 }
1601
1602 static int init_act_open(struct cxgbi_sock *csk)
1603 {
1604 struct cxgbi_device *cdev = csk->cdev;
1605 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1606 struct net_device *ndev = cdev->ports[csk->port_id];
1607 struct sk_buff *skb = NULL;
1608 struct neighbour *n = NULL;
1609 void *daddr;
1610 unsigned int step;
1611 unsigned int rxq_idx;
1612 unsigned int size, size6;
1613 unsigned int linkspeed;
1614 unsigned int rcv_winf, snd_winf;
1615
1616 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1617 "csk 0x%p,%u,0x%lx,%u.\n",
1618 csk, csk->state, csk->flags, csk->tid);
1619
1620 if (csk->csk_family == AF_INET)
1621 daddr = &csk->daddr.sin_addr.s_addr;
1622 #if IS_ENABLED(CONFIG_IPV6)
1623 else if (csk->csk_family == AF_INET6)
1624 daddr = &csk->daddr6.sin6_addr;
1625 #endif
1626 else {
1627 pr_err("address family 0x%x not supported\n", csk->csk_family);
1628 goto rel_resource;
1629 }
1630
1631 n = dst_neigh_lookup(csk->dst, daddr);
1632
1633 if (!n) {
1634 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1635 goto rel_resource;
1636 }
1637
1638 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1639 if (csk->atid < 0) {
1640 pr_err("%s, NO atid available.\n", ndev->name);
1641 goto rel_resource_without_clip;
1642 }
1643 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1644 cxgbi_sock_get(csk);
1645
1646 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1647 if (!csk->l2t) {
1648 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1649 goto rel_resource_without_clip;
1650 }
1651 cxgbi_sock_get(csk);
1652
1653 #if IS_ENABLED(CONFIG_IPV6)
1654 if (csk->csk_family == AF_INET6)
1655 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1656 #endif
1657
1658 if (is_t4(lldi->adapter_type)) {
1659 size = sizeof(struct cpl_act_open_req);
1660 size6 = sizeof(struct cpl_act_open_req6);
1661 } else if (is_t5(lldi->adapter_type)) {
1662 size = sizeof(struct cpl_t5_act_open_req);
1663 size6 = sizeof(struct cpl_t5_act_open_req6);
1664 } else {
1665 size = sizeof(struct cpl_t6_act_open_req);
1666 size6 = sizeof(struct cpl_t6_act_open_req6);
1667 }
1668
1669 if (csk->csk_family == AF_INET)
1670 skb = alloc_wr(size, 0, GFP_NOIO);
1671 #if IS_ENABLED(CONFIG_IPV6)
1672 else
1673 skb = alloc_wr(size6, 0, GFP_NOIO);
1674 #endif
1675
1676 if (!skb)
1677 goto rel_resource;
1678 skb->sk = (struct sock *)csk;
1679 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1680
1681 if (!csk->mtu)
1682 csk->mtu = dst_mtu(csk->dst);
1683 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1684 csk->tx_chan = cxgb4_port_chan(ndev);
1685 csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type,
1686 cxgb4_port_viid(ndev));
1687 step = lldi->ntxq / lldi->nchan;
1688 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1689 step = lldi->nrxq / lldi->nchan;
1690 rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);
1691 cdev->rxq_idx_cntr++;
1692 csk->rss_qid = lldi->rxq_ids[rxq_idx];
1693 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1694 csk->snd_win = cxgb4i_snd_win;
1695 csk->rcv_win = cxgb4i_rcv_win;
1696 if (cxgb4i_rcv_win <= 0) {
1697 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1698 rcv_winf = linkspeed / SPEED_10000;
1699 if (rcv_winf)
1700 csk->rcv_win *= rcv_winf;
1701 }
1702 if (cxgb4i_snd_win <= 0) {
1703 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1704 snd_winf = linkspeed / SPEED_10000;
1705 if (snd_winf)
1706 csk->snd_win *= snd_winf;
1707 }
1708 csk->wr_cred = lldi->wr_cred -
1709 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1710 csk->wr_max_cred = csk->wr_cred;
1711 csk->wr_una_cred = 0;
1712 cxgbi_sock_reset_wr_list(csk);
1713 csk->err = 0;
1714
1715 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1716 (&csk->saddr), (&csk->daddr), csk, csk->state,
1717 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1718 csk->mtu, csk->mss_idx, csk->smac_idx);
1719
1720 /* must wait for either a act_open_rpl or act_open_establish */
1721 if (!try_module_get(cdev->owner)) {
1722 pr_err("%s, try_module_get failed.\n", ndev->name);
1723 goto rel_resource;
1724 }
1725
1726 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1727 if (csk->csk_family == AF_INET)
1728 send_act_open_req(csk, skb, csk->l2t);
1729 #if IS_ENABLED(CONFIG_IPV6)
1730 else
1731 send_act_open_req6(csk, skb, csk->l2t);
1732 #endif
1733 neigh_release(n);
1734
1735 return 0;
1736
1737 rel_resource:
1738 #if IS_ENABLED(CONFIG_IPV6)
1739 if (csk->csk_family == AF_INET6)
1740 cxgb4_clip_release(ndev,
1741 (const u32 *)&csk->saddr6.sin6_addr, 1);
1742 #endif
1743 rel_resource_without_clip:
1744 if (n)
1745 neigh_release(n);
1746 if (skb)
1747 __kfree_skb(skb);
1748 return -EINVAL;
1749 }
1750
1751 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1752 [CPL_ACT_ESTABLISH] = do_act_establish,
1753 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1754 [CPL_PEER_CLOSE] = do_peer_close,
1755 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1756 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1757 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1758 [CPL_FW4_ACK] = do_fw4_ack,
1759 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1760 [CPL_ISCSI_DATA] = do_rx_iscsi_data,
1761 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1762 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1763 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1764 [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
1765 [CPL_RX_DATA] = do_rx_data,
1766 };
1767
1768 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1769 {
1770 int rc;
1771
1772 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1773 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1774
1775 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1776 cxgb4i_max_connect);
1777 if (rc < 0)
1778 return rc;
1779
1780 cdev->csk_release_offload_resources = release_offload_resources;
1781 cdev->csk_push_tx_frames = push_tx_frames;
1782 cdev->csk_send_abort_req = send_abort_req;
1783 cdev->csk_send_close_req = send_close_req;
1784 cdev->csk_send_rx_credits = send_rx_credits;
1785 cdev->csk_alloc_cpls = alloc_cpls;
1786 cdev->csk_init_act_open = init_act_open;
1787
1788 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1789 return 0;
1790 }
1791
1792 static inline void
1793 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1794 struct ulp_mem_io *req,
1795 unsigned int wr_len, unsigned int dlen,
1796 unsigned int pm_addr,
1797 int tid)
1798 {
1799 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1800 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1801
1802 INIT_ULPTX_WR(req, wr_len, 0, tid);
1803 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1804 FW_WR_ATOMIC_V(0));
1805 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1806 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1807 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1808 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1809 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1810 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1811
1812 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1813 idata->len = htonl(dlen);
1814 }
1815
1816 static struct sk_buff *
1817 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1818 struct cxgbi_ppm *ppm,
1819 unsigned int idx, unsigned int npods,
1820 unsigned int tid)
1821 {
1822 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1823 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1824 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1825 sizeof(struct ulptx_idata) + dlen, 16);
1826 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1827
1828 if (!skb) {
1829 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1830 __func__, ppm->ndev->name, idx, npods);
1831 return NULL;
1832 }
1833
1834 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1835 pm_addr, tid);
1836
1837 return skb;
1838 }
1839
1840 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1841 struct cxgbi_task_tag_info *ttinfo,
1842 unsigned int idx, unsigned int npods,
1843 struct scatterlist **sg_pp,
1844 unsigned int *sg_off)
1845 {
1846 struct cxgbi_device *cdev = csk->cdev;
1847 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1848 csk->tid);
1849 struct ulp_mem_io *req;
1850 struct ulptx_idata *idata;
1851 struct cxgbi_pagepod *ppod;
1852 int i;
1853
1854 if (!skb)
1855 return -ENOMEM;
1856
1857 req = (struct ulp_mem_io *)skb->head;
1858 idata = (struct ulptx_idata *)(req + 1);
1859 ppod = (struct cxgbi_pagepod *)(idata + 1);
1860
1861 for (i = 0; i < npods; i++, ppod++)
1862 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1863
1864 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1865 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1866 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1867
1868 spin_lock_bh(&csk->lock);
1869 cxgbi_sock_skb_entail(csk, skb);
1870 spin_unlock_bh(&csk->lock);
1871
1872 return 0;
1873 }
1874
1875 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1876 struct cxgbi_task_tag_info *ttinfo)
1877 {
1878 unsigned int pidx = ttinfo->idx;
1879 unsigned int npods = ttinfo->npods;
1880 unsigned int i, cnt;
1881 int err = 0;
1882 struct scatterlist *sg = ttinfo->sgl;
1883 unsigned int offset = 0;
1884
1885 ttinfo->cid = csk->port_id;
1886
1887 for (i = 0; i < npods; i += cnt, pidx += cnt) {
1888 cnt = npods - i;
1889
1890 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1891 cnt = ULPMEM_IDATA_MAX_NPPODS;
1892 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1893 &sg, &offset);
1894 if (err < 0)
1895 break;
1896 }
1897
1898 return err;
1899 }
1900
1901 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1902 int pg_idx, bool reply)
1903 {
1904 struct sk_buff *skb;
1905 struct cpl_set_tcb_field *req;
1906
1907 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1908 return 0;
1909
1910 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1911 if (!skb)
1912 return -ENOMEM;
1913
1914 /* set up ulp page size */
1915 req = (struct cpl_set_tcb_field *)skb->head;
1916 INIT_TP_WR(req, csk->tid);
1917 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1918 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1919 req->word_cookie = htons(0);
1920 req->mask = cpu_to_be64(0x3 << 8);
1921 req->val = cpu_to_be64(pg_idx << 8);
1922 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1923
1924 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1925 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1926
1927 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1928 return 0;
1929 }
1930
1931 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1932 int hcrc, int dcrc, int reply)
1933 {
1934 struct sk_buff *skb;
1935 struct cpl_set_tcb_field *req;
1936
1937 if (!hcrc && !dcrc)
1938 return 0;
1939
1940 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1941 if (!skb)
1942 return -ENOMEM;
1943
1944 csk->hcrc_len = (hcrc ? 4 : 0);
1945 csk->dcrc_len = (dcrc ? 4 : 0);
1946 /* set up ulp submode */
1947 req = (struct cpl_set_tcb_field *)skb->head;
1948 INIT_TP_WR(req, tid);
1949 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1950 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1951 req->word_cookie = htons(0);
1952 req->mask = cpu_to_be64(0x3 << 4);
1953 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1954 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1955 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1956
1957 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1958 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1959
1960 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1961 return 0;
1962 }
1963
1964 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
1965 {
1966 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
1967 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
1968 }
1969
1970 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1971 {
1972 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1973 struct net_device *ndev = cdev->ports[0];
1974 struct cxgbi_tag_format tformat;
1975 unsigned int ppmax;
1976 int i;
1977
1978 if (!lldi->vr->iscsi.size) {
1979 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
1980 return -EACCES;
1981 }
1982
1983 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
1984 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
1985
1986 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
1987 for (i = 0; i < 4; i++)
1988 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
1989 & 0xF;
1990 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
1991
1992 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
1993 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
1994
1995 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1996 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1997 cdev->csk_ddp_set_map = ddp_set_map;
1998 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1999 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2000 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2001 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2002 cdev->cdev2ppm = cdev2ppm;
2003
2004 return 0;
2005 }
2006
2007 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2008 {
2009 struct cxgbi_device *cdev;
2010 struct port_info *pi;
2011 int i, rc;
2012
2013 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2014 if (!cdev) {
2015 pr_info("t4 device 0x%p, register failed.\n", lldi);
2016 return NULL;
2017 }
2018 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2019 cdev, lldi->adapter_type, lldi->nports,
2020 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2021 lldi->nrxq, lldi->wr_cred);
2022 for (i = 0; i < lldi->nrxq; i++)
2023 log_debug(1 << CXGBI_DBG_DEV,
2024 "t4 0x%p, rxq id #%d: %u.\n",
2025 cdev, i, lldi->rxq_ids[i]);
2026
2027 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2028 cdev->flags = CXGBI_FLAG_DEV_T4;
2029 cdev->pdev = lldi->pdev;
2030 cdev->ports = lldi->ports;
2031 cdev->nports = lldi->nports;
2032 cdev->mtus = lldi->mtus;
2033 cdev->nmtus = NMTUS;
2034 cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2035 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2036 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2037 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2038 cdev->itp = &cxgb4i_iscsi_transport;
2039 cdev->owner = THIS_MODULE;
2040
2041 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
2042 << FW_VIID_PFN_S;
2043 pr_info("cdev 0x%p,%s, pfvf %u.\n",
2044 cdev, lldi->ports[0]->name, cdev->pfvf);
2045
2046 rc = cxgb4i_ddp_init(cdev);
2047 if (rc) {
2048 pr_info("t4 0x%p ddp init failed.\n", cdev);
2049 goto err_out;
2050 }
2051 rc = cxgb4i_ofld_init(cdev);
2052 if (rc) {
2053 pr_info("t4 0x%p ofld init failed.\n", cdev);
2054 goto err_out;
2055 }
2056
2057 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
2058 &cxgb4i_host_template, cxgb4i_stt);
2059 if (rc)
2060 goto err_out;
2061
2062 for (i = 0; i < cdev->nports; i++) {
2063 pi = netdev_priv(lldi->ports[i]);
2064 cdev->hbas[i]->port_id = pi->port_id;
2065 }
2066 return cdev;
2067
2068 err_out:
2069 cxgbi_device_unregister(cdev);
2070 return ERR_PTR(-ENOMEM);
2071 }
2072
2073 #define RX_PULL_LEN 128
2074 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2075 const struct pkt_gl *pgl)
2076 {
2077 const struct cpl_act_establish *rpl;
2078 struct sk_buff *skb;
2079 unsigned int opc;
2080 struct cxgbi_device *cdev = handle;
2081
2082 if (pgl == NULL) {
2083 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2084
2085 skb = alloc_wr(len, 0, GFP_ATOMIC);
2086 if (!skb)
2087 goto nomem;
2088 skb_copy_to_linear_data(skb, &rsp[1], len);
2089 } else {
2090 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2091 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2092 pgl->va, be64_to_cpu(*rsp),
2093 be64_to_cpu(*(u64 *)pgl->va),
2094 pgl->tot_len);
2095 return 0;
2096 }
2097 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2098 if (unlikely(!skb))
2099 goto nomem;
2100 }
2101
2102 rpl = (struct cpl_act_establish *)skb->data;
2103 opc = rpl->ot.opcode;
2104 log_debug(1 << CXGBI_DBG_TOE,
2105 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2106 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2107 if (cxgb4i_cplhandlers[opc])
2108 cxgb4i_cplhandlers[opc](cdev, skb);
2109 else {
2110 pr_err("No handler for opcode 0x%x.\n", opc);
2111 __kfree_skb(skb);
2112 }
2113 return 0;
2114 nomem:
2115 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2116 return 1;
2117 }
2118
2119 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2120 {
2121 struct cxgbi_device *cdev = handle;
2122
2123 switch (state) {
2124 case CXGB4_STATE_UP:
2125 pr_info("cdev 0x%p, UP.\n", cdev);
2126 break;
2127 case CXGB4_STATE_START_RECOVERY:
2128 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2129 /* close all connections */
2130 break;
2131 case CXGB4_STATE_DOWN:
2132 pr_info("cdev 0x%p, DOWN.\n", cdev);
2133 break;
2134 case CXGB4_STATE_DETACH:
2135 pr_info("cdev 0x%p, DETACH.\n", cdev);
2136 cxgbi_device_unregister(cdev);
2137 break;
2138 default:
2139 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2140 break;
2141 }
2142 return 0;
2143 }
2144
2145 static int __init cxgb4i_init_module(void)
2146 {
2147 int rc;
2148
2149 printk(KERN_INFO "%s", version);
2150
2151 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2152 if (rc < 0)
2153 return rc;
2154 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
2155
2156 return 0;
2157 }
2158
2159 static void __exit cxgb4i_exit_module(void)
2160 {
2161 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2162 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2163 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2164 }
2165
2166 module_init(cxgb4i_init_module);
2167 module_exit(cxgb4i_exit_module);
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