projects / deliverable / linux.git / blob
? search:


d31f9e600639351277026e3d47dd0a02943089f6
[deliverable/linux.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
1 /*
2 * cxgb4i.c: Chelsio T4 iSCSI driver.
3 *
4 * Copyright (c) 2010 Chelsio Communications, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Rakesh Ranjan (rranjan@chelsio.com)
12 */
13
14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
15
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <scsi/scsi_host.h>
19 #include <net/tcp.h>
20 #include <net/dst.h>
21 #include <linux/netdevice.h>
22 #include <net/addrconf.h>
23
24 #include "t4_regs.h"
25 #include "t4_msg.h"
26 #include "cxgb4.h"
27 #include "cxgb4_uld.h"
28 #include "t4fw_api.h"
29 #include "l2t.h"
30 #include "cxgb4i.h"
31
32 static unsigned int dbg_level;
33
34 #include "../libcxgbi.h"
35
36 #define DRV_MODULE_NAME "cxgb4i"
37 #define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
38 #define DRV_MODULE_VERSION "0.9.4"
39
40 static char version[] =
41 DRV_MODULE_DESC " " DRV_MODULE_NAME
42 " v" DRV_MODULE_VERSION "\n";
43
44 MODULE_AUTHOR("Chelsio Communications, Inc.");
45 MODULE_DESCRIPTION(DRV_MODULE_DESC);
46 MODULE_VERSION(DRV_MODULE_VERSION);
47 MODULE_LICENSE("GPL");
48
49 module_param(dbg_level, uint, 0644);
50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
51
52 static int cxgb4i_rcv_win = 256 * 1024;
53 module_param(cxgb4i_rcv_win, int, 0644);
54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
55
56 static int cxgb4i_snd_win = 128 * 1024;
57 module_param(cxgb4i_snd_win, int, 0644);
58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
59
60 static int cxgb4i_rx_credit_thres = 10 * 1024;
61 module_param(cxgb4i_rx_credit_thres, int, 0644);
62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
63 "RX credits return threshold in bytes (default=10KB)");
64
65 static unsigned int cxgb4i_max_connect = (8 * 1024);
66 module_param(cxgb4i_max_connect, uint, 0644);
67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
68
69 static unsigned short cxgb4i_sport_base = 20000;
70 module_param(cxgb4i_sport_base, ushort, 0644);
71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
72
73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
74
75 static void *t4_uld_add(const struct cxgb4_lld_info *);
76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
77 static int t4_uld_state_change(void *, enum cxgb4_state state);
78
79 static const struct cxgb4_uld_info cxgb4i_uld_info = {
80 .name = DRV_MODULE_NAME,
81 .add = t4_uld_add,
82 .rx_handler = t4_uld_rx_handler,
83 .state_change = t4_uld_state_change,
84 };
85
86 static struct scsi_host_template cxgb4i_host_template = {
87 .module = THIS_MODULE,
88 .name = DRV_MODULE_NAME,
89 .proc_name = DRV_MODULE_NAME,
90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
91 .queuecommand = iscsi_queuecommand,
92 .change_queue_depth = iscsi_change_queue_depth,
93 .sg_tablesize = SG_ALL,
94 .max_sectors = 0xFFFF,
95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
96 .eh_abort_handler = iscsi_eh_abort,
97 .eh_device_reset_handler = iscsi_eh_device_reset,
98 .eh_target_reset_handler = iscsi_eh_recover_target,
99 .target_alloc = iscsi_target_alloc,
100 .use_clustering = DISABLE_CLUSTERING,
101 .this_id = -1,
102 };
103
104 static struct iscsi_transport cxgb4i_iscsi_transport = {
105 .owner = THIS_MODULE,
106 .name = DRV_MODULE_NAME,
107 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
108 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
109 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
110 .attr_is_visible = cxgbi_attr_is_visible,
111 .get_host_param = cxgbi_get_host_param,
112 .set_host_param = cxgbi_set_host_param,
113 /* session management */
114 .create_session = cxgbi_create_session,
115 .destroy_session = cxgbi_destroy_session,
116 .get_session_param = iscsi_session_get_param,
117 /* connection management */
118 .create_conn = cxgbi_create_conn,
119 .bind_conn = cxgbi_bind_conn,
120 .destroy_conn = iscsi_tcp_conn_teardown,
121 .start_conn = iscsi_conn_start,
122 .stop_conn = iscsi_conn_stop,
123 .get_conn_param = iscsi_conn_get_param,
124 .set_param = cxgbi_set_conn_param,
125 .get_stats = cxgbi_get_conn_stats,
126 /* pdu xmit req from user space */
127 .send_pdu = iscsi_conn_send_pdu,
128 /* task */
129 .init_task = iscsi_tcp_task_init,
130 .xmit_task = iscsi_tcp_task_xmit,
131 .cleanup_task = cxgbi_cleanup_task,
132 /* pdu */
133 .alloc_pdu = cxgbi_conn_alloc_pdu,
134 .init_pdu = cxgbi_conn_init_pdu,
135 .xmit_pdu = cxgbi_conn_xmit_pdu,
136 .parse_pdu_itt = cxgbi_parse_pdu_itt,
137 /* TCP connect/disconnect */
138 .get_ep_param = cxgbi_get_ep_param,
139 .ep_connect = cxgbi_ep_connect,
140 .ep_poll = cxgbi_ep_poll,
141 .ep_disconnect = cxgbi_ep_disconnect,
142 /* Error recovery timeout call */
143 .session_recovery_timedout = iscsi_session_recovery_timedout,
144 };
145
146 static struct scsi_transport_template *cxgb4i_stt;
147
148 /*
149 * CPL (Chelsio Protocol Language) defines a message passing interface between
150 * the host driver and Chelsio asic.
151 * The section below implments CPLs that related to iscsi tcp connection
152 * open/close/abort and data send/receive.
153 */
154
155 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
156 #define RCV_BUFSIZ_MASK 0x3FFU
157 #define MAX_IMM_TX_PKT_LEN 128
158
159 static inline void set_queue(struct sk_buff *skb, unsigned int queue,
160 const struct cxgbi_sock *csk)
161 {
162 skb->queue_mapping = queue;
163 }
164
165 static int push_tx_frames(struct cxgbi_sock *, int);
166
167 /*
168 * is_ofld_imm - check whether a packet can be sent as immediate data
169 * @skb: the packet
170 *
171 * Returns true if a packet can be sent as an offload WR with immediate
172 * data. We currently use the same limit as for Ethernet packets.
173 */
174 static inline int is_ofld_imm(const struct sk_buff *skb)
175 {
176 return skb->len <= (MAX_IMM_TX_PKT_LEN -
177 sizeof(struct fw_ofld_tx_data_wr));
178 }
179
180 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
181 struct l2t_entry *e)
182 {
183 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
184 int t4 = is_t4(lldi->adapter_type);
185 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
186 unsigned long long opt0;
187 unsigned int opt2;
188 unsigned int qid_atid = ((unsigned int)csk->atid) |
189 (((unsigned int)csk->rss_qid) << 14);
190
191 opt0 = KEEP_ALIVE(1) |
192 WND_SCALE(wscale) |
193 MSS_IDX(csk->mss_idx) |
194 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
195 TX_CHAN(csk->tx_chan) |
196 SMAC_SEL(csk->smac_idx) |
197 ULP_MODE(ULP_MODE_ISCSI) |
198 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
199 opt2 = RX_CHANNEL(0) |
200 RSS_QUEUE_VALID |
201 (1 << 20) |
202 RSS_QUEUE(csk->rss_qid);
203
204 if (is_t4(lldi->adapter_type)) {
205 struct cpl_act_open_req *req =
206 (struct cpl_act_open_req *)skb->head;
207
208 INIT_TP_WR(req, 0);
209 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
210 qid_atid));
211 req->local_port = csk->saddr.sin_port;
212 req->peer_port = csk->daddr.sin_port;
213 req->local_ip = csk->saddr.sin_addr.s_addr;
214 req->peer_ip = csk->daddr.sin_addr.s_addr;
215 req->opt0 = cpu_to_be64(opt0);
216 req->params = cpu_to_be32(cxgb4_select_ntuple(
217 csk->cdev->ports[csk->port_id],
218 csk->l2t));
219 opt2 |= 1 << 22;
220 req->opt2 = cpu_to_be32(opt2);
221
222 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
223 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
224 csk, &req->local_ip, ntohs(req->local_port),
225 &req->peer_ip, ntohs(req->peer_port),
226 csk->atid, csk->rss_qid);
227 } else {
228 struct cpl_t5_act_open_req *req =
229 (struct cpl_t5_act_open_req *)skb->head;
230
231 INIT_TP_WR(req, 0);
232 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
233 qid_atid));
234 req->local_port = csk->saddr.sin_port;
235 req->peer_port = csk->daddr.sin_port;
236 req->local_ip = csk->saddr.sin_addr.s_addr;
237 req->peer_ip = csk->daddr.sin_addr.s_addr;
238 req->opt0 = cpu_to_be64(opt0);
239 req->params = cpu_to_be64(V_FILTER_TUPLE(
240 cxgb4_select_ntuple(
241 csk->cdev->ports[csk->port_id],
242 csk->l2t)));
243 opt2 |= 1 << 31;
244 req->opt2 = cpu_to_be32(opt2);
245
246 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
247 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
248 csk, &req->local_ip, ntohs(req->local_port),
249 &req->peer_ip, ntohs(req->peer_port),
250 csk->atid, csk->rss_qid);
251 }
252
253 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
254
255 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
256 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
257 csk->state, csk->flags, csk->atid, csk->rss_qid);
258
259 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
260 }
261
262 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
263 struct l2t_entry *e)
264 {
265 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
266 int t4 = is_t4(lldi->adapter_type);
267 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
268 unsigned long long opt0;
269 unsigned int opt2;
270 unsigned int qid_atid = ((unsigned int)csk->atid) |
271 (((unsigned int)csk->rss_qid) << 14);
272
273 opt0 = KEEP_ALIVE(1) |
274 WND_SCALE(wscale) |
275 MSS_IDX(csk->mss_idx) |
276 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
277 TX_CHAN(csk->tx_chan) |
278 SMAC_SEL(csk->smac_idx) |
279 ULP_MODE(ULP_MODE_ISCSI) |
280 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
281
282 opt2 = RX_CHANNEL(0) |
283 RSS_QUEUE_VALID |
284 RX_FC_DISABLE |
285 RSS_QUEUE(csk->rss_qid);
286
287 if (t4) {
288 struct cpl_act_open_req6 *req =
289 (struct cpl_act_open_req6 *)skb->head;
290
291 INIT_TP_WR(req, 0);
292 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
293 qid_atid));
294 req->local_port = csk->saddr6.sin6_port;
295 req->peer_port = csk->daddr6.sin6_port;
296
297 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
298 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
299 8);
300 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
301 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
302 8);
303
304 req->opt0 = cpu_to_be64(opt0);
305
306 opt2 |= RX_FC_VALID;
307 req->opt2 = cpu_to_be32(opt2);
308
309 req->params = cpu_to_be32(cxgb4_select_ntuple(
310 csk->cdev->ports[csk->port_id],
311 csk->l2t));
312 } else {
313 struct cpl_t5_act_open_req6 *req =
314 (struct cpl_t5_act_open_req6 *)skb->head;
315
316 INIT_TP_WR(req, 0);
317 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
318 qid_atid));
319 req->local_port = csk->saddr6.sin6_port;
320 req->peer_port = csk->daddr6.sin6_port;
321 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
322 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
323 8);
324 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
325 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
326 8);
327 req->opt0 = cpu_to_be64(opt0);
328
329 opt2 |= T5_OPT_2_VALID;
330 req->opt2 = cpu_to_be32(opt2);
331
332 req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
333 csk->cdev->ports[csk->port_id],
334 csk->l2t)));
335 }
336
337 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
338
339 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
340 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
341 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
342 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
343 csk->rss_qid);
344
345 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
346 }
347
348 static void send_close_req(struct cxgbi_sock *csk)
349 {
350 struct sk_buff *skb = csk->cpl_close;
351 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
352 unsigned int tid = csk->tid;
353
354 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
355 "csk 0x%p,%u,0x%lx, tid %u.\n",
356 csk, csk->state, csk->flags, csk->tid);
357 csk->cpl_close = NULL;
358 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
359 INIT_TP_WR(req, tid);
360 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
361 req->rsvd = 0;
362
363 cxgbi_sock_skb_entail(csk, skb);
364 if (csk->state >= CTP_ESTABLISHED)
365 push_tx_frames(csk, 1);
366 }
367
368 static void abort_arp_failure(void *handle, struct sk_buff *skb)
369 {
370 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
371 struct cpl_abort_req *req;
372
373 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
374 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
375 csk, csk->state, csk->flags, csk->tid);
376 req = (struct cpl_abort_req *)skb->data;
377 req->cmd = CPL_ABORT_NO_RST;
378 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
379 }
380
381 static void send_abort_req(struct cxgbi_sock *csk)
382 {
383 struct cpl_abort_req *req;
384 struct sk_buff *skb = csk->cpl_abort_req;
385
386 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
387 return;
388 cxgbi_sock_set_state(csk, CTP_ABORTING);
389 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
390 cxgbi_sock_purge_write_queue(csk);
391
392 csk->cpl_abort_req = NULL;
393 req = (struct cpl_abort_req *)skb->head;
394 set_queue(skb, CPL_PRIORITY_DATA, csk);
395 req->cmd = CPL_ABORT_SEND_RST;
396 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
397 INIT_TP_WR(req, csk->tid);
398 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
399 req->rsvd0 = htonl(csk->snd_nxt);
400 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
401
402 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
403 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
404 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
405 req->rsvd1);
406
407 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
408 }
409
410 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
411 {
412 struct sk_buff *skb = csk->cpl_abort_rpl;
413 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
414
415 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
416 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
417 csk, csk->state, csk->flags, csk->tid, rst_status);
418
419 csk->cpl_abort_rpl = NULL;
420 set_queue(skb, CPL_PRIORITY_DATA, csk);
421 INIT_TP_WR(rpl, csk->tid);
422 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
423 rpl->cmd = rst_status;
424 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
425 }
426
427 /*
428 * CPL connection rx data ack: host ->
429 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
430 * credits sent.
431 */
432 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
433 {
434 struct sk_buff *skb;
435 struct cpl_rx_data_ack *req;
436
437 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
438 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
439 csk, csk->state, csk->flags, csk->tid, credits);
440
441 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
442 if (!skb) {
443 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
444 return 0;
445 }
446 req = (struct cpl_rx_data_ack *)skb->head;
447
448 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
449 INIT_TP_WR(req, csk->tid);
450 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
451 csk->tid));
452 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
453 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
454 return credits;
455 }
456
457 /*
458 * sgl_len - calculates the size of an SGL of the given capacity
459 * @n: the number of SGL entries
460 * Calculates the number of flits needed for a scatter/gather list that
461 * can hold the given number of entries.
462 */
463 static inline unsigned int sgl_len(unsigned int n)
464 {
465 n--;
466 return (3 * n) / 2 + (n & 1) + 2;
467 }
468
469 /*
470 * calc_tx_flits_ofld - calculate # of flits for an offload packet
471 * @skb: the packet
472 *
473 * Returns the number of flits needed for the given offload packet.
474 * These packets are already fully constructed and no additional headers
475 * will be added.
476 */
477 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
478 {
479 unsigned int flits, cnt;
480
481 if (is_ofld_imm(skb))
482 return DIV_ROUND_UP(skb->len, 8);
483 flits = skb_transport_offset(skb) / 8;
484 cnt = skb_shinfo(skb)->nr_frags;
485 if (skb_tail_pointer(skb) != skb_transport_header(skb))
486 cnt++;
487 return flits + sgl_len(cnt);
488 }
489
490 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
491 {
492 struct sk_buff *skb;
493 struct fw_flowc_wr *flowc;
494 int flowclen, i;
495
496 flowclen = 80;
497 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
498 flowc = (struct fw_flowc_wr *)skb->head;
499 flowc->op_to_nparams =
500 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
501 flowc->flowid_len16 =
502 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
503 FW_WR_FLOWID(csk->tid));
504 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
505 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
506 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
507 flowc->mnemval[1].val = htonl(csk->tx_chan);
508 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
509 flowc->mnemval[2].val = htonl(csk->tx_chan);
510 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
511 flowc->mnemval[3].val = htonl(csk->rss_qid);
512 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
513 flowc->mnemval[4].val = htonl(csk->snd_nxt);
514 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
515 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
516 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
517 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
518 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
519 flowc->mnemval[7].val = htonl(csk->advmss);
520 flowc->mnemval[8].mnemonic = 0;
521 flowc->mnemval[8].val = 0;
522 for (i = 0; i < 9; i++) {
523 flowc->mnemval[i].r4[0] = 0;
524 flowc->mnemval[i].r4[1] = 0;
525 flowc->mnemval[i].r4[2] = 0;
526 }
527 set_queue(skb, CPL_PRIORITY_DATA, csk);
528
529 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
530 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
531 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
532 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
533 csk->advmss);
534
535 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
536 }
537
538 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
539 int dlen, int len, u32 credits, int compl)
540 {
541 struct fw_ofld_tx_data_wr *req;
542 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
543 unsigned int wr_ulp_mode = 0;
544
545 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
546
547 if (is_ofld_imm(skb)) {
548 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
549 FW_WR_COMPL(1) |
550 FW_WR_IMMDLEN(dlen));
551 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
552 FW_WR_LEN16(credits));
553 } else {
554 req->op_to_immdlen =
555 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
556 FW_WR_COMPL(1) |
557 FW_WR_IMMDLEN(0));
558 req->flowid_len16 =
559 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
560 FW_WR_LEN16(credits));
561 }
562 if (submode)
563 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
564 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
565 req->tunnel_to_proxy = htonl(wr_ulp_mode |
566 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1));
567 req->plen = htonl(len);
568 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
569 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
570 }
571
572 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
573 {
574 kfree_skb(skb);
575 }
576
577 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
578 {
579 int total_size = 0;
580 struct sk_buff *skb;
581
582 if (unlikely(csk->state < CTP_ESTABLISHED ||
583 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
584 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
585 1 << CXGBI_DBG_PDU_TX,
586 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
587 csk, csk->state, csk->flags, csk->tid);
588 return 0;
589 }
590
591 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
592 int dlen = skb->len;
593 int len = skb->len;
594 unsigned int credits_needed;
595
596 skb_reset_transport_header(skb);
597 if (is_ofld_imm(skb))
598 credits_needed = DIV_ROUND_UP(dlen +
599 sizeof(struct fw_ofld_tx_data_wr), 16);
600 else
601 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
602 + sizeof(struct fw_ofld_tx_data_wr),
603 16);
604
605 if (csk->wr_cred < credits_needed) {
606 log_debug(1 << CXGBI_DBG_PDU_TX,
607 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
608 csk, skb->len, skb->data_len,
609 credits_needed, csk->wr_cred);
610 break;
611 }
612 __skb_unlink(skb, &csk->write_queue);
613 set_queue(skb, CPL_PRIORITY_DATA, csk);
614 skb->csum = credits_needed;
615 csk->wr_cred -= credits_needed;
616 csk->wr_una_cred += credits_needed;
617 cxgbi_sock_enqueue_wr(csk, skb);
618
619 log_debug(1 << CXGBI_DBG_PDU_TX,
620 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
621 csk, skb->len, skb->data_len, credits_needed,
622 csk->wr_cred, csk->wr_una_cred);
623
624 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
625 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
626 send_tx_flowc_wr(csk);
627 skb->csum += 5;
628 csk->wr_cred -= 5;
629 csk->wr_una_cred += 5;
630 }
631 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
632 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
633 req_completion);
634 csk->snd_nxt += len;
635 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
636 }
637 total_size += skb->truesize;
638 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
639
640 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
641 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
642 csk, csk->state, csk->flags, csk->tid, skb, len);
643
644 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
645 }
646 return total_size;
647 }
648
649 static inline void free_atid(struct cxgbi_sock *csk)
650 {
651 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
652
653 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
654 cxgb4_free_atid(lldi->tids, csk->atid);
655 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
656 cxgbi_sock_put(csk);
657 }
658 }
659
660 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
661 {
662 struct cxgbi_sock *csk;
663 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
664 unsigned short tcp_opt = ntohs(req->tcp_opt);
665 unsigned int tid = GET_TID(req);
666 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
667 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
668 struct tid_info *t = lldi->tids;
669 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
670
671 csk = lookup_atid(t, atid);
672 if (unlikely(!csk)) {
673 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
674 goto rel_skb;
675 }
676
677 if (csk->atid != atid) {
678 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
679 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
680 goto rel_skb;
681 }
682
683 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
684 (&csk->saddr), (&csk->daddr),
685 atid, tid, csk, csk->state, csk->flags, rcv_isn);
686
687 module_put(THIS_MODULE);
688
689 cxgbi_sock_get(csk);
690 csk->tid = tid;
691 cxgb4_insert_tid(lldi->tids, csk, tid);
692 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
693
694 free_atid(csk);
695
696 spin_lock_bh(&csk->lock);
697 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
698 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
699 csk, csk->state, csk->flags, csk->tid);
700
701 if (csk->retry_timer.function) {
702 del_timer(&csk->retry_timer);
703 csk->retry_timer.function = NULL;
704 }
705
706 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
707 /*
708 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
709 * pass through opt0.
710 */
711 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
712 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
713
714 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
715 if (GET_TCPOPT_TSTAMP(tcp_opt))
716 csk->advmss -= 12;
717 if (csk->advmss < 128)
718 csk->advmss = 128;
719
720 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
721 "csk 0x%p, mss_idx %u, advmss %u.\n",
722 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
723
724 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
725
726 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
727 send_abort_req(csk);
728 else {
729 if (skb_queue_len(&csk->write_queue))
730 push_tx_frames(csk, 0);
731 cxgbi_conn_tx_open(csk);
732 }
733 spin_unlock_bh(&csk->lock);
734
735 rel_skb:
736 __kfree_skb(skb);
737 }
738
739 static int act_open_rpl_status_to_errno(int status)
740 {
741 switch (status) {
742 case CPL_ERR_CONN_RESET:
743 return -ECONNREFUSED;
744 case CPL_ERR_ARP_MISS:
745 return -EHOSTUNREACH;
746 case CPL_ERR_CONN_TIMEDOUT:
747 return -ETIMEDOUT;
748 case CPL_ERR_TCAM_FULL:
749 return -ENOMEM;
750 case CPL_ERR_CONN_EXIST:
751 return -EADDRINUSE;
752 default:
753 return -EIO;
754 }
755 }
756
757 static void csk_act_open_retry_timer(unsigned long data)
758 {
759 struct sk_buff *skb;
760 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
761 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
762 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
763 struct l2t_entry *);
764 int t4 = is_t4(lldi->adapter_type), size, size6;
765
766 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
767 "csk 0x%p,%u,0x%lx,%u.\n",
768 csk, csk->state, csk->flags, csk->tid);
769
770 cxgbi_sock_get(csk);
771 spin_lock_bh(&csk->lock);
772
773 if (t4) {
774 size = sizeof(struct cpl_act_open_req);
775 size6 = sizeof(struct cpl_act_open_req6);
776 } else {
777 size = sizeof(struct cpl_t5_act_open_req);
778 size6 = sizeof(struct cpl_t5_act_open_req6);
779 }
780
781 if (csk->csk_family == AF_INET) {
782 send_act_open_func = send_act_open_req;
783 skb = alloc_wr(size, 0, GFP_ATOMIC);
784 } else {
785 send_act_open_func = send_act_open_req6;
786 skb = alloc_wr(size6, 0, GFP_ATOMIC);
787 }
788
789 if (!skb)
790 cxgbi_sock_fail_act_open(csk, -ENOMEM);
791 else {
792 skb->sk = (struct sock *)csk;
793 t4_set_arp_err_handler(skb, csk,
794 cxgbi_sock_act_open_req_arp_failure);
795 send_act_open_func(csk, skb, csk->l2t);
796 }
797
798 spin_unlock_bh(&csk->lock);
799 cxgbi_sock_put(csk);
800
801 }
802
803 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
804 {
805 struct cxgbi_sock *csk;
806 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
807 unsigned int tid = GET_TID(rpl);
808 unsigned int atid =
809 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
810 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
811 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
812 struct tid_info *t = lldi->tids;
813
814 csk = lookup_atid(t, atid);
815 if (unlikely(!csk)) {
816 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
817 goto rel_skb;
818 }
819
820 pr_info_ipaddr("tid %u/%u, status %u.\n"
821 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
822 atid, tid, status, csk, csk->state, csk->flags);
823
824 if (status == CPL_ERR_RTX_NEG_ADVICE)
825 goto rel_skb;
826
827 if (status && status != CPL_ERR_TCAM_FULL &&
828 status != CPL_ERR_CONN_EXIST &&
829 status != CPL_ERR_ARP_MISS)
830 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
831
832 cxgbi_sock_get(csk);
833 spin_lock_bh(&csk->lock);
834
835 if (status == CPL_ERR_CONN_EXIST &&
836 csk->retry_timer.function != csk_act_open_retry_timer) {
837 csk->retry_timer.function = csk_act_open_retry_timer;
838 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
839 } else
840 cxgbi_sock_fail_act_open(csk,
841 act_open_rpl_status_to_errno(status));
842
843 spin_unlock_bh(&csk->lock);
844 cxgbi_sock_put(csk);
845 rel_skb:
846 __kfree_skb(skb);
847 }
848
849 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
850 {
851 struct cxgbi_sock *csk;
852 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
853 unsigned int tid = GET_TID(req);
854 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
855 struct tid_info *t = lldi->tids;
856
857 csk = lookup_tid(t, tid);
858 if (unlikely(!csk)) {
859 pr_err("can't find connection for tid %u.\n", tid);
860 goto rel_skb;
861 }
862 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
863 (&csk->saddr), (&csk->daddr),
864 csk, csk->state, csk->flags, csk->tid);
865 cxgbi_sock_rcv_peer_close(csk);
866 rel_skb:
867 __kfree_skb(skb);
868 }
869
870 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
871 {
872 struct cxgbi_sock *csk;
873 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
874 unsigned int tid = GET_TID(rpl);
875 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
876 struct tid_info *t = lldi->tids;
877
878 csk = lookup_tid(t, tid);
879 if (unlikely(!csk)) {
880 pr_err("can't find connection for tid %u.\n", tid);
881 goto rel_skb;
882 }
883 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
884 (&csk->saddr), (&csk->daddr),
885 csk, csk->state, csk->flags, csk->tid);
886 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
887 rel_skb:
888 __kfree_skb(skb);
889 }
890
891 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
892 int *need_rst)
893 {
894 switch (abort_reason) {
895 case CPL_ERR_BAD_SYN: /* fall through */
896 case CPL_ERR_CONN_RESET:
897 return csk->state > CTP_ESTABLISHED ?
898 -EPIPE : -ECONNRESET;
899 case CPL_ERR_XMIT_TIMEDOUT:
900 case CPL_ERR_PERSIST_TIMEDOUT:
901 case CPL_ERR_FINWAIT2_TIMEDOUT:
902 case CPL_ERR_KEEPALIVE_TIMEDOUT:
903 return -ETIMEDOUT;
904 default:
905 return -EIO;
906 }
907 }
908
909 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
910 {
911 struct cxgbi_sock *csk;
912 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
913 unsigned int tid = GET_TID(req);
914 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
915 struct tid_info *t = lldi->tids;
916 int rst_status = CPL_ABORT_NO_RST;
917
918 csk = lookup_tid(t, tid);
919 if (unlikely(!csk)) {
920 pr_err("can't find connection for tid %u.\n", tid);
921 goto rel_skb;
922 }
923
924 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
925 (&csk->saddr), (&csk->daddr),
926 csk, csk->state, csk->flags, csk->tid, req->status);
927
928 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
929 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
930 goto rel_skb;
931
932 cxgbi_sock_get(csk);
933 spin_lock_bh(&csk->lock);
934
935 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
936 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
937 cxgbi_sock_set_state(csk, CTP_ABORTING);
938 goto done;
939 }
940
941 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
942 send_abort_rpl(csk, rst_status);
943
944 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
945 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
946 cxgbi_sock_closed(csk);
947 }
948 done:
949 spin_unlock_bh(&csk->lock);
950 cxgbi_sock_put(csk);
951 rel_skb:
952 __kfree_skb(skb);
953 }
954
955 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
956 {
957 struct cxgbi_sock *csk;
958 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
959 unsigned int tid = GET_TID(rpl);
960 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
961 struct tid_info *t = lldi->tids;
962
963 csk = lookup_tid(t, tid);
964 if (!csk)
965 goto rel_skb;
966
967 if (csk)
968 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
969 (&csk->saddr), (&csk->daddr), csk,
970 csk->state, csk->flags, csk->tid, rpl->status);
971
972 if (rpl->status == CPL_ERR_ABORT_FAILED)
973 goto rel_skb;
974
975 cxgbi_sock_rcv_abort_rpl(csk);
976 rel_skb:
977 __kfree_skb(skb);
978 }
979
980 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
981 {
982 struct cxgbi_sock *csk;
983 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
984 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
985 unsigned int tid = GET_TID(cpl);
986 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
987 struct tid_info *t = lldi->tids;
988
989 csk = lookup_tid(t, tid);
990 if (unlikely(!csk)) {
991 pr_err("can't find conn. for tid %u.\n", tid);
992 goto rel_skb;
993 }
994
995 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
996 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
997 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
998 pdu_len_ddp);
999
1000 spin_lock_bh(&csk->lock);
1001
1002 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1003 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1004 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1005 csk, csk->state, csk->flags, csk->tid);
1006 if (csk->state != CTP_ABORTING)
1007 goto abort_conn;
1008 else
1009 goto discard;
1010 }
1011
1012 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1013 cxgbi_skcb_flags(skb) = 0;
1014
1015 skb_reset_transport_header(skb);
1016 __skb_pull(skb, sizeof(*cpl));
1017 __pskb_trim(skb, ntohs(cpl->len));
1018
1019 if (!csk->skb_ulp_lhdr) {
1020 unsigned char *bhs;
1021 unsigned int hlen, dlen, plen;
1022
1023 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1024 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1025 csk, csk->state, csk->flags, csk->tid, skb);
1026 csk->skb_ulp_lhdr = skb;
1027 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1028
1029 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1030 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1031 csk->tid, cxgbi_skcb_tcp_seq(skb),
1032 csk->rcv_nxt);
1033 goto abort_conn;
1034 }
1035
1036 bhs = skb->data;
1037 hlen = ntohs(cpl->len);
1038 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1039
1040 plen = ISCSI_PDU_LEN(pdu_len_ddp);
1041 if (is_t4(lldi->adapter_type))
1042 plen -= 40;
1043
1044 if ((hlen + dlen) != plen) {
1045 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1046 "mismatch %u != %u + %u, seq 0x%x.\n",
1047 csk->tid, plen, hlen, dlen,
1048 cxgbi_skcb_tcp_seq(skb));
1049 goto abort_conn;
1050 }
1051
1052 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1053 if (dlen)
1054 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1055 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1056
1057 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1058 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1059 csk, skb, *bhs, hlen, dlen,
1060 ntohl(*((unsigned int *)(bhs + 16))),
1061 ntohl(*((unsigned int *)(bhs + 24))));
1062
1063 } else {
1064 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1065
1066 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1067 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1068 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1069 csk, csk->state, csk->flags, skb, lskb);
1070 }
1071
1072 __skb_queue_tail(&csk->receive_queue, skb);
1073 spin_unlock_bh(&csk->lock);
1074 return;
1075
1076 abort_conn:
1077 send_abort_req(csk);
1078 discard:
1079 spin_unlock_bh(&csk->lock);
1080 rel_skb:
1081 __kfree_skb(skb);
1082 }
1083
1084 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1085 struct sk_buff *skb)
1086 {
1087 struct cxgbi_sock *csk;
1088 struct sk_buff *lskb;
1089 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1090 unsigned int tid = GET_TID(rpl);
1091 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1092 struct tid_info *t = lldi->tids;
1093 unsigned int status = ntohl(rpl->ddpvld);
1094
1095 csk = lookup_tid(t, tid);
1096 if (unlikely(!csk)) {
1097 pr_err("can't find connection for tid %u.\n", tid);
1098 goto rel_skb;
1099 }
1100
1101 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1102 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1103 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1104
1105 spin_lock_bh(&csk->lock);
1106
1107 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1108 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1109 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1110 csk, csk->state, csk->flags, csk->tid);
1111 if (csk->state != CTP_ABORTING)
1112 goto abort_conn;
1113 else
1114 goto discard;
1115 }
1116
1117 if (!csk->skb_ulp_lhdr) {
1118 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1119 goto abort_conn;
1120 }
1121
1122 lskb = csk->skb_ulp_lhdr;
1123 csk->skb_ulp_lhdr = NULL;
1124
1125 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1126
1127 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1128 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1129 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1130
1131 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1132 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1133 csk, lskb, status, cxgbi_skcb_flags(lskb));
1134 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1135 }
1136 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1137 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1138 csk, lskb, status, cxgbi_skcb_flags(lskb));
1139 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1140 }
1141 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1142 log_debug(1 << CXGBI_DBG_PDU_RX,
1143 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1144 csk, lskb, status);
1145 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1146 }
1147 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1148 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1149 log_debug(1 << CXGBI_DBG_PDU_RX,
1150 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1151 csk, lskb, status);
1152 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1153 }
1154 log_debug(1 << CXGBI_DBG_PDU_RX,
1155 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1156 csk, lskb, cxgbi_skcb_flags(lskb));
1157
1158 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1159 cxgbi_conn_pdu_ready(csk);
1160 spin_unlock_bh(&csk->lock);
1161 goto rel_skb;
1162
1163 abort_conn:
1164 send_abort_req(csk);
1165 discard:
1166 spin_unlock_bh(&csk->lock);
1167 rel_skb:
1168 __kfree_skb(skb);
1169 }
1170
1171 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1172 {
1173 struct cxgbi_sock *csk;
1174 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1175 unsigned int tid = GET_TID(rpl);
1176 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1177 struct tid_info *t = lldi->tids;
1178
1179 csk = lookup_tid(t, tid);
1180 if (unlikely(!csk))
1181 pr_err("can't find connection for tid %u.\n", tid);
1182 else {
1183 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1184 "csk 0x%p,%u,0x%lx,%u.\n",
1185 csk, csk->state, csk->flags, csk->tid);
1186 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1187 rpl->seq_vld);
1188 }
1189 __kfree_skb(skb);
1190 }
1191
1192 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1193 {
1194 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1195 unsigned int tid = GET_TID(rpl);
1196 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1197 struct tid_info *t = lldi->tids;
1198 struct cxgbi_sock *csk;
1199
1200 csk = lookup_tid(t, tid);
1201 if (!csk)
1202 pr_err("can't find conn. for tid %u.\n", tid);
1203
1204 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1205 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1206 csk, csk->state, csk->flags, csk->tid, rpl->status);
1207
1208 if (rpl->status != CPL_ERR_NONE)
1209 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1210 csk, tid, rpl->status);
1211
1212 __kfree_skb(skb);
1213 }
1214
1215 static int alloc_cpls(struct cxgbi_sock *csk)
1216 {
1217 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1218 0, GFP_KERNEL);
1219 if (!csk->cpl_close)
1220 return -ENOMEM;
1221
1222 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1223 0, GFP_KERNEL);
1224 if (!csk->cpl_abort_req)
1225 goto free_cpls;
1226
1227 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1228 0, GFP_KERNEL);
1229 if (!csk->cpl_abort_rpl)
1230 goto free_cpls;
1231 return 0;
1232
1233 free_cpls:
1234 cxgbi_sock_free_cpl_skbs(csk);
1235 return -ENOMEM;
1236 }
1237
1238 static inline void l2t_put(struct cxgbi_sock *csk)
1239 {
1240 if (csk->l2t) {
1241 cxgb4_l2t_release(csk->l2t);
1242 csk->l2t = NULL;
1243 cxgbi_sock_put(csk);
1244 }
1245 }
1246
1247 static void release_offload_resources(struct cxgbi_sock *csk)
1248 {
1249 struct cxgb4_lld_info *lldi;
1250
1251 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1252 "csk 0x%p,%u,0x%lx,%u.\n",
1253 csk, csk->state, csk->flags, csk->tid);
1254
1255 cxgbi_sock_free_cpl_skbs(csk);
1256 if (csk->wr_cred != csk->wr_max_cred) {
1257 cxgbi_sock_purge_wr_queue(csk);
1258 cxgbi_sock_reset_wr_list(csk);
1259 }
1260
1261 l2t_put(csk);
1262 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1263 free_atid(csk);
1264 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1265 lldi = cxgbi_cdev_priv(csk->cdev);
1266 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1267 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1268 cxgbi_sock_put(csk);
1269 }
1270 csk->dst = NULL;
1271 csk->cdev = NULL;
1272 }
1273
1274 static int init_act_open(struct cxgbi_sock *csk)
1275 {
1276 struct cxgbi_device *cdev = csk->cdev;
1277 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1278 struct net_device *ndev = cdev->ports[csk->port_id];
1279 struct sk_buff *skb = NULL;
1280 struct neighbour *n = NULL;
1281 void *daddr;
1282 unsigned int step;
1283 unsigned int size, size6;
1284 int t4 = is_t4(lldi->adapter_type);
1285
1286 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1287 "csk 0x%p,%u,0x%lx,%u.\n",
1288 csk, csk->state, csk->flags, csk->tid);
1289
1290 if (csk->csk_family == AF_INET)
1291 daddr = &csk->daddr.sin_addr.s_addr;
1292 #if IS_ENABLED(CONFIG_IPV6)
1293 else if (csk->csk_family == AF_INET6)
1294 daddr = &csk->daddr6.sin6_addr;
1295 #endif
1296 else {
1297 pr_err("address family 0x%x not supported\n", csk->csk_family);
1298 goto rel_resource;
1299 }
1300
1301 n = dst_neigh_lookup(csk->dst, daddr);
1302
1303 if (!n) {
1304 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1305 goto rel_resource;
1306 }
1307
1308 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1309 if (csk->atid < 0) {
1310 pr_err("%s, NO atid available.\n", ndev->name);
1311 return -EINVAL;
1312 }
1313 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1314 cxgbi_sock_get(csk);
1315
1316 n = dst_neigh_lookup(csk->dst, &csk->daddr.sin_addr.s_addr);
1317 if (!n) {
1318 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1319 goto rel_resource;
1320 }
1321 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1322 if (!csk->l2t) {
1323 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1324 goto rel_resource;
1325 }
1326 cxgbi_sock_get(csk);
1327
1328 if (t4) {
1329 size = sizeof(struct cpl_act_open_req);
1330 size6 = sizeof(struct cpl_act_open_req6);
1331 } else {
1332 size = sizeof(struct cpl_t5_act_open_req);
1333 size6 = sizeof(struct cpl_t5_act_open_req6);
1334 }
1335
1336 if (csk->csk_family == AF_INET)
1337 skb = alloc_wr(size, 0, GFP_NOIO);
1338 else
1339 skb = alloc_wr(size6, 0, GFP_NOIO);
1340
1341 if (!skb)
1342 goto rel_resource;
1343 skb->sk = (struct sock *)csk;
1344 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1345
1346 if (!csk->mtu)
1347 csk->mtu = dst_mtu(csk->dst);
1348 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1349 csk->tx_chan = cxgb4_port_chan(ndev);
1350 /* SMT two entries per row */
1351 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1352 step = lldi->ntxq / lldi->nchan;
1353 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1354 step = lldi->nrxq / lldi->nchan;
1355 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1356 csk->wr_cred = lldi->wr_cred -
1357 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1358 csk->wr_max_cred = csk->wr_cred;
1359 csk->wr_una_cred = 0;
1360 cxgbi_sock_reset_wr_list(csk);
1361 csk->err = 0;
1362
1363 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1364 (&csk->saddr), (&csk->daddr), csk, csk->state,
1365 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1366 csk->mtu, csk->mss_idx, csk->smac_idx);
1367
1368 /* must wait for either a act_open_rpl or act_open_establish */
1369 try_module_get(THIS_MODULE);
1370 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1371 if (csk->csk_family == AF_INET)
1372 send_act_open_req(csk, skb, csk->l2t);
1373 else
1374 send_act_open_req6(csk, skb, csk->l2t);
1375 neigh_release(n);
1376
1377 return 0;
1378
1379 rel_resource:
1380 if (n)
1381 neigh_release(n);
1382 if (skb)
1383 __kfree_skb(skb);
1384 return -EINVAL;
1385 }
1386
1387 #define CPL_ISCSI_DATA 0xB2
1388 #define CPL_RX_ISCSI_DDP 0x49
1389 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1390 [CPL_ACT_ESTABLISH] = do_act_establish,
1391 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1392 [CPL_PEER_CLOSE] = do_peer_close,
1393 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1394 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1395 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1396 [CPL_FW4_ACK] = do_fw4_ack,
1397 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1398 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1399 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1400 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1401 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1402 };
1403
1404 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1405 {
1406 int rc;
1407
1408 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1409 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1410
1411 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1412 cxgb4i_max_connect);
1413 if (rc < 0)
1414 return rc;
1415
1416 cdev->csk_release_offload_resources = release_offload_resources;
1417 cdev->csk_push_tx_frames = push_tx_frames;
1418 cdev->csk_send_abort_req = send_abort_req;
1419 cdev->csk_send_close_req = send_close_req;
1420 cdev->csk_send_rx_credits = send_rx_credits;
1421 cdev->csk_alloc_cpls = alloc_cpls;
1422 cdev->csk_init_act_open = init_act_open;
1423
1424 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1425 return 0;
1426 }
1427
1428 /*
1429 * functions to program the pagepod in h/w
1430 */
1431 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1432 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1433 struct ulp_mem_io *req,
1434 unsigned int wr_len, unsigned int dlen,
1435 unsigned int pm_addr)
1436 {
1437 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1438
1439 INIT_ULPTX_WR(req, wr_len, 0, 0);
1440 if (is_t4(lldi->adapter_type))
1441 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1442 (ULP_MEMIO_ORDER(1)));
1443 else
1444 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1445 (V_T5_ULP_MEMIO_IMM(1)));
1446 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1447 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1448 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1449
1450 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1451 idata->len = htonl(dlen);
1452 }
1453
1454 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1455 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1456 unsigned int npods,
1457 struct cxgbi_gather_list *gl,
1458 unsigned int gl_pidx)
1459 {
1460 struct cxgbi_ddp_info *ddp = cdev->ddp;
1461 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1462 struct sk_buff *skb;
1463 struct ulp_mem_io *req;
1464 struct ulptx_idata *idata;
1465 struct cxgbi_pagepod *ppod;
1466 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1467 unsigned int dlen = PPOD_SIZE * npods;
1468 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1469 sizeof(struct ulptx_idata) + dlen, 16);
1470 unsigned int i;
1471
1472 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1473 if (!skb) {
1474 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1475 cdev, idx, npods);
1476 return -ENOMEM;
1477 }
1478 req = (struct ulp_mem_io *)skb->head;
1479 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1480
1481 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
1482 idata = (struct ulptx_idata *)(req + 1);
1483 ppod = (struct cxgbi_pagepod *)(idata + 1);
1484
1485 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1486 if (!hdr && !gl)
1487 cxgbi_ddp_ppod_clear(ppod);
1488 else
1489 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1490 }
1491
1492 cxgb4_ofld_send(cdev->ports[port_id], skb);
1493 return 0;
1494 }
1495
1496 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1497 unsigned int idx, unsigned int npods,
1498 struct cxgbi_gather_list *gl)
1499 {
1500 unsigned int i, cnt;
1501 int err = 0;
1502
1503 for (i = 0; i < npods; i += cnt, idx += cnt) {
1504 cnt = npods - i;
1505 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1506 cnt = ULPMEM_IDATA_MAX_NPPODS;
1507 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1508 idx, cnt, gl, 4 * i);
1509 if (err < 0)
1510 break;
1511 }
1512 return err;
1513 }
1514
1515 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1516 unsigned int idx, unsigned int npods)
1517 {
1518 unsigned int i, cnt;
1519 int err;
1520
1521 for (i = 0; i < npods; i += cnt, idx += cnt) {
1522 cnt = npods - i;
1523 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1524 cnt = ULPMEM_IDATA_MAX_NPPODS;
1525 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1526 idx, cnt, NULL, 0);
1527 if (err < 0)
1528 break;
1529 }
1530 }
1531
1532 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1533 int pg_idx, bool reply)
1534 {
1535 struct sk_buff *skb;
1536 struct cpl_set_tcb_field *req;
1537
1538 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1539 return 0;
1540
1541 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1542 if (!skb)
1543 return -ENOMEM;
1544
1545 /* set up ulp page size */
1546 req = (struct cpl_set_tcb_field *)skb->head;
1547 INIT_TP_WR(req, csk->tid);
1548 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1549 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1550 req->word_cookie = htons(0);
1551 req->mask = cpu_to_be64(0x3 << 8);
1552 req->val = cpu_to_be64(pg_idx << 8);
1553 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1554
1555 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1556 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1557
1558 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1559 return 0;
1560 }
1561
1562 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1563 int hcrc, int dcrc, int reply)
1564 {
1565 struct sk_buff *skb;
1566 struct cpl_set_tcb_field *req;
1567
1568 if (!hcrc && !dcrc)
1569 return 0;
1570
1571 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1572 if (!skb)
1573 return -ENOMEM;
1574
1575 csk->hcrc_len = (hcrc ? 4 : 0);
1576 csk->dcrc_len = (dcrc ? 4 : 0);
1577 /* set up ulp submode */
1578 req = (struct cpl_set_tcb_field *)skb->head;
1579 INIT_TP_WR(req, tid);
1580 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1581 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1582 req->word_cookie = htons(0);
1583 req->mask = cpu_to_be64(0x3 << 4);
1584 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1585 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1586 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1587
1588 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1589 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1590
1591 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1592 return 0;
1593 }
1594
1595 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1596 {
1597 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1598 struct cxgbi_ddp_info *ddp = cdev->ddp;
1599 unsigned int tagmask, pgsz_factor[4];
1600 int err;
1601
1602 if (ddp) {
1603 kref_get(&ddp->refcnt);
1604 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1605 cdev, cdev->ddp);
1606 return -EALREADY;
1607 }
1608
1609 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1610 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1611 lldi->iscsi_iolen, lldi->iscsi_iolen);
1612 if (err < 0)
1613 return err;
1614
1615 ddp = cdev->ddp;
1616
1617 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1618 cxgbi_ddp_page_size_factor(pgsz_factor);
1619 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1620
1621 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1622 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1623 cdev->csk_ddp_set = ddp_set_map;
1624 cdev->csk_ddp_clear = ddp_clear_map;
1625
1626 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1627 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1628 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1629 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1630 " %u/%u.\n",
1631 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1632 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1633 ddp->max_rxsz, lldi->iscsi_iolen);
1634 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1635 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1636 ddp->max_rxsz);
1637 return 0;
1638 }
1639
1640 #if IS_ENABLED(CONFIG_IPV6)
1641 static int cxgbi_inet6addr_handler(struct notifier_block *this,
1642 unsigned long event, void *data)
1643 {
1644 struct inet6_ifaddr *ifa = data;
1645 struct net_device *event_dev = ifa->idev->dev;
1646 struct cxgbi_device *cdev;
1647 int ret = NOTIFY_DONE;
1648
1649 if (event_dev->priv_flags & IFF_802_1Q_VLAN)
1650 event_dev = vlan_dev_real_dev(event_dev);
1651
1652 cdev = cxgbi_device_find_by_netdev(event_dev, NULL);
1653
1654 if (!cdev)
1655 return ret;
1656
1657 switch (event) {
1658 case NETDEV_UP:
1659 ret = cxgb4_clip_get(event_dev,
1660 (const struct in6_addr *)
1661 ((ifa)->addr.s6_addr));
1662 if (ret < 0)
1663 return ret;
1664
1665 ret = NOTIFY_OK;
1666 break;
1667
1668 case NETDEV_DOWN:
1669 cxgb4_clip_release(event_dev,
1670 (const struct in6_addr *)
1671 ((ifa)->addr.s6_addr));
1672 ret = NOTIFY_OK;
1673 break;
1674
1675 default:
1676 break;
1677 }
1678
1679 return ret;
1680 }
1681
1682 static struct notifier_block cxgbi_inet6addr_notifier = {
1683 .notifier_call = cxgbi_inet6addr_handler
1684 };
1685
1686 /* Retrieve IPv6 addresses from a root device (bond, vlan) associated with
1687 * a physical device.
1688 * The physical device reference is needed to send the actual CLIP command.
1689 */
1690 static int update_dev_clip(struct net_device *root_dev, struct net_device *dev)
1691 {
1692 struct inet6_dev *idev = NULL;
1693 struct inet6_ifaddr *ifa;
1694 int ret = 0;
1695
1696 idev = __in6_dev_get(root_dev);
1697 if (!idev)
1698 return ret;
1699
1700 read_lock_bh(&idev->lock);
1701 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1702 pr_info("updating the clip for addr %pI6\n",
1703 ifa->addr.s6_addr);
1704 ret = cxgb4_clip_get(dev, (const struct in6_addr *)
1705 ifa->addr.s6_addr);
1706 if (ret < 0)
1707 break;
1708 }
1709
1710 read_unlock_bh(&idev->lock);
1711 return ret;
1712 }
1713
1714 static int update_root_dev_clip(struct net_device *dev)
1715 {
1716 struct net_device *root_dev = NULL;
1717 int i, ret = 0;
1718
1719 /* First populate the real net device's IPv6 address */
1720 ret = update_dev_clip(dev, dev);
1721 if (ret)
1722 return ret;
1723
1724 /* Parse all bond and vlan devices layered on top of the physical dev */
1725 root_dev = netdev_master_upper_dev_get(dev);
1726 if (root_dev) {
1727 ret = update_dev_clip(root_dev, dev);
1728 if (ret)
1729 return ret;
1730 }
1731
1732 for (i = 0; i < VLAN_N_VID; i++) {
1733 root_dev = __vlan_find_dev_deep_rcu(dev, htons(ETH_P_8021Q), i);
1734 if (!root_dev)
1735 continue;
1736
1737 ret = update_dev_clip(root_dev, dev);
1738 if (ret)
1739 break;
1740 }
1741 return ret;
1742 }
1743
1744 static void cxgbi_update_clip(struct cxgbi_device *cdev)
1745 {
1746 int i;
1747
1748 rcu_read_lock();
1749
1750 for (i = 0; i < cdev->nports; i++) {
1751 struct net_device *dev = cdev->ports[i];
1752 int ret = 0;
1753
1754 if (dev)
1755 ret = update_root_dev_clip(dev);
1756 if (ret < 0)
1757 break;
1758 }
1759 rcu_read_unlock();
1760 }
1761 #endif /* IS_ENABLED(CONFIG_IPV6) */
1762
1763 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1764 {
1765 struct cxgbi_device *cdev;
1766 struct port_info *pi;
1767 int i, rc;
1768
1769 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1770 if (!cdev) {
1771 pr_info("t4 device 0x%p, register failed.\n", lldi);
1772 return NULL;
1773 }
1774 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1775 cdev, lldi->adapter_type, lldi->nports,
1776 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1777 lldi->nrxq, lldi->wr_cred);
1778 for (i = 0; i < lldi->nrxq; i++)
1779 log_debug(1 << CXGBI_DBG_DEV,
1780 "t4 0x%p, rxq id #%d: %u.\n",
1781 cdev, i, lldi->rxq_ids[i]);
1782
1783 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1784 cdev->flags = CXGBI_FLAG_DEV_T4;
1785 cdev->pdev = lldi->pdev;
1786 cdev->ports = lldi->ports;
1787 cdev->nports = lldi->nports;
1788 cdev->mtus = lldi->mtus;
1789 cdev->nmtus = NMTUS;
1790 cdev->snd_win = cxgb4i_snd_win;
1791 cdev->rcv_win = cxgb4i_rcv_win;
1792 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1793 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1794 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1795 cdev->itp = &cxgb4i_iscsi_transport;
1796
1797 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1798 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1799 cdev, lldi->ports[0]->name, cdev->pfvf);
1800
1801 rc = cxgb4i_ddp_init(cdev);
1802 if (rc) {
1803 pr_info("t4 0x%p ddp init failed.\n", cdev);
1804 goto err_out;
1805 }
1806 rc = cxgb4i_ofld_init(cdev);
1807 if (rc) {
1808 pr_info("t4 0x%p ofld init failed.\n", cdev);
1809 goto err_out;
1810 }
1811
1812 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1813 &cxgb4i_host_template, cxgb4i_stt);
1814 if (rc)
1815 goto err_out;
1816
1817 for (i = 0; i < cdev->nports; i++) {
1818 pi = netdev_priv(lldi->ports[i]);
1819 cdev->hbas[i]->port_id = pi->port_id;
1820 }
1821 return cdev;
1822
1823 err_out:
1824 cxgbi_device_unregister(cdev);
1825 return ERR_PTR(-ENOMEM);
1826 }
1827
1828 #define RX_PULL_LEN 128
1829 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1830 const struct pkt_gl *pgl)
1831 {
1832 const struct cpl_act_establish *rpl;
1833 struct sk_buff *skb;
1834 unsigned int opc;
1835 struct cxgbi_device *cdev = handle;
1836
1837 if (pgl == NULL) {
1838 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1839
1840 skb = alloc_wr(len, 0, GFP_ATOMIC);
1841 if (!skb)
1842 goto nomem;
1843 skb_copy_to_linear_data(skb, &rsp[1], len);
1844 } else {
1845 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1846 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1847 pgl->va, be64_to_cpu(*rsp),
1848 be64_to_cpu(*(u64 *)pgl->va),
1849 pgl->tot_len);
1850 return 0;
1851 }
1852 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1853 if (unlikely(!skb))
1854 goto nomem;
1855 }
1856
1857 rpl = (struct cpl_act_establish *)skb->data;
1858 opc = rpl->ot.opcode;
1859 log_debug(1 << CXGBI_DBG_TOE,
1860 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1861 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1862 if (cxgb4i_cplhandlers[opc])
1863 cxgb4i_cplhandlers[opc](cdev, skb);
1864 else {
1865 pr_err("No handler for opcode 0x%x.\n", opc);
1866 __kfree_skb(skb);
1867 }
1868 return 0;
1869 nomem:
1870 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1871 return 1;
1872 }
1873
1874 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1875 {
1876 struct cxgbi_device *cdev = handle;
1877
1878 switch (state) {
1879 case CXGB4_STATE_UP:
1880 pr_info("cdev 0x%p, UP.\n", cdev);
1881 #if IS_ENABLED(CONFIG_IPV6)
1882 cxgbi_update_clip(cdev);
1883 #endif
1884 /* re-initialize */
1885 break;
1886 case CXGB4_STATE_START_RECOVERY:
1887 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1888 /* close all connections */
1889 break;
1890 case CXGB4_STATE_DOWN:
1891 pr_info("cdev 0x%p, DOWN.\n", cdev);
1892 break;
1893 case CXGB4_STATE_DETACH:
1894 pr_info("cdev 0x%p, DETACH.\n", cdev);
1895 cxgbi_device_unregister(cdev);
1896 break;
1897 default:
1898 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1899 break;
1900 }
1901 return 0;
1902 }
1903
1904 static int __init cxgb4i_init_module(void)
1905 {
1906 int rc;
1907
1908 printk(KERN_INFO "%s", version);
1909
1910 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1911 if (rc < 0)
1912 return rc;
1913 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1914
1915 #if IS_ENABLED(CONFIG_IPV6)
1916 register_inet6addr_notifier(&cxgbi_inet6addr_notifier);
1917 #endif
1918 return 0;
1919 }
1920
1921 static void __exit cxgb4i_exit_module(void)
1922 {
1923 #if IS_ENABLED(CONFIG_IPV6)
1924 unregister_inet6addr_notifier(&cxgbi_inet6addr_notifier);
1925 #endif
1926 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1927 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1928 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1929 }
1930
1931 module_init(cxgb4i_init_module);
1932 module_exit(cxgb4i_exit_module);
Linux kernel - Deliverables
This page took 0.071431 seconds and 4 git commands to generate.