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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[mirror_ubuntu-zesty-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/T5 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 .rxq_size = 1024,
89 .lro = false,
90 .add = t4_uld_add,
91 .rx_handler = t4_uld_rx_handler,
92 .state_change = t4_uld_state_change,
93 };
94
95 static struct scsi_host_template cxgb4i_host_template = {
96 .module = THIS_MODULE,
97 .name = DRV_MODULE_NAME,
98 .proc_name = DRV_MODULE_NAME,
99 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
100 .queuecommand = iscsi_queuecommand,
101 .change_queue_depth = scsi_change_queue_depth,
102 .sg_tablesize = SG_ALL,
103 .max_sectors = 0xFFFF,
104 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
105 .eh_abort_handler = iscsi_eh_abort,
106 .eh_device_reset_handler = iscsi_eh_device_reset,
107 .eh_target_reset_handler = iscsi_eh_recover_target,
108 .target_alloc = iscsi_target_alloc,
109 .use_clustering = DISABLE_CLUSTERING,
110 .this_id = -1,
111 .track_queue_depth = 1,
112 };
113
114 static struct iscsi_transport cxgb4i_iscsi_transport = {
115 .owner = THIS_MODULE,
116 .name = DRV_MODULE_NAME,
117 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
118 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
119 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
120 .attr_is_visible = cxgbi_attr_is_visible,
121 .get_host_param = cxgbi_get_host_param,
122 .set_host_param = cxgbi_set_host_param,
123 /* session management */
124 .create_session = cxgbi_create_session,
125 .destroy_session = cxgbi_destroy_session,
126 .get_session_param = iscsi_session_get_param,
127 /* connection management */
128 .create_conn = cxgbi_create_conn,
129 .bind_conn = cxgbi_bind_conn,
130 .destroy_conn = iscsi_tcp_conn_teardown,
131 .start_conn = iscsi_conn_start,
132 .stop_conn = iscsi_conn_stop,
133 .get_conn_param = iscsi_conn_get_param,
134 .set_param = cxgbi_set_conn_param,
135 .get_stats = cxgbi_get_conn_stats,
136 /* pdu xmit req from user space */
137 .send_pdu = iscsi_conn_send_pdu,
138 /* task */
139 .init_task = iscsi_tcp_task_init,
140 .xmit_task = iscsi_tcp_task_xmit,
141 .cleanup_task = cxgbi_cleanup_task,
142 /* pdu */
143 .alloc_pdu = cxgbi_conn_alloc_pdu,
144 .init_pdu = cxgbi_conn_init_pdu,
145 .xmit_pdu = cxgbi_conn_xmit_pdu,
146 .parse_pdu_itt = cxgbi_parse_pdu_itt,
147 /* TCP connect/disconnect */
148 .get_ep_param = cxgbi_get_ep_param,
149 .ep_connect = cxgbi_ep_connect,
150 .ep_poll = cxgbi_ep_poll,
151 .ep_disconnect = cxgbi_ep_disconnect,
152 /* Error recovery timeout call */
153 .session_recovery_timedout = iscsi_session_recovery_timedout,
154 };
155
156 static struct scsi_transport_template *cxgb4i_stt;
157
158 /*
159 * CPL (Chelsio Protocol Language) defines a message passing interface between
160 * the host driver and Chelsio asic.
161 * The section below implments CPLs that related to iscsi tcp connection
162 * open/close/abort and data send/receive.
163 */
164
165 #define RCV_BUFSIZ_MASK 0x3FFU
166 #define MAX_IMM_TX_PKT_LEN 256
167
168 static int push_tx_frames(struct cxgbi_sock *, int);
169
170 /*
171 * is_ofld_imm - check whether a packet can be sent as immediate data
172 * @skb: the packet
173 *
174 * Returns true if a packet can be sent as an offload WR with immediate
175 * data. We currently use the same limit as for Ethernet packets.
176 */
177 static inline bool is_ofld_imm(const struct sk_buff *skb)
178 {
179 int len = skb->len;
180
181 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
182 len += sizeof(struct fw_ofld_tx_data_wr);
183
184 return len <= MAX_IMM_TX_PKT_LEN;
185 }
186
187 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
188 struct l2t_entry *e)
189 {
190 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
191 int t4 = is_t4(lldi->adapter_type);
192 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
193 unsigned long long opt0;
194 unsigned int opt2;
195 unsigned int qid_atid = ((unsigned int)csk->atid) |
196 (((unsigned int)csk->rss_qid) << 14);
197
198 opt0 = KEEP_ALIVE_F |
199 WND_SCALE_V(wscale) |
200 MSS_IDX_V(csk->mss_idx) |
201 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
202 TX_CHAN_V(csk->tx_chan) |
203 SMAC_SEL_V(csk->smac_idx) |
204 ULP_MODE_V(ULP_MODE_ISCSI) |
205 RCV_BUFSIZ_V(csk->rcv_win >> 10);
206
207 opt2 = RX_CHANNEL_V(0) |
208 RSS_QUEUE_VALID_F |
209 RSS_QUEUE_V(csk->rss_qid);
210
211 if (is_t4(lldi->adapter_type)) {
212 struct cpl_act_open_req *req =
213 (struct cpl_act_open_req *)skb->head;
214
215 INIT_TP_WR(req, 0);
216 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
217 qid_atid));
218 req->local_port = csk->saddr.sin_port;
219 req->peer_port = csk->daddr.sin_port;
220 req->local_ip = csk->saddr.sin_addr.s_addr;
221 req->peer_ip = csk->daddr.sin_addr.s_addr;
222 req->opt0 = cpu_to_be64(opt0);
223 req->params = cpu_to_be32(cxgb4_select_ntuple(
224 csk->cdev->ports[csk->port_id],
225 csk->l2t));
226 opt2 |= RX_FC_VALID_F;
227 req->opt2 = cpu_to_be32(opt2);
228
229 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
230 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
231 csk, &req->local_ip, ntohs(req->local_port),
232 &req->peer_ip, ntohs(req->peer_port),
233 csk->atid, csk->rss_qid);
234 } else {
235 struct cpl_t5_act_open_req *req =
236 (struct cpl_t5_act_open_req *)skb->head;
237 u32 isn = (prandom_u32() & ~7UL) - 1;
238
239 INIT_TP_WR(req, 0);
240 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
241 qid_atid));
242 req->local_port = csk->saddr.sin_port;
243 req->peer_port = csk->daddr.sin_port;
244 req->local_ip = csk->saddr.sin_addr.s_addr;
245 req->peer_ip = csk->daddr.sin_addr.s_addr;
246 req->opt0 = cpu_to_be64(opt0);
247 req->params = cpu_to_be64(FILTER_TUPLE_V(
248 cxgb4_select_ntuple(
249 csk->cdev->ports[csk->port_id],
250 csk->l2t)));
251 req->rsvd = cpu_to_be32(isn);
252 opt2 |= T5_ISS_VALID;
253 opt2 |= T5_OPT_2_VALID_F;
254
255 req->opt2 = cpu_to_be32(opt2);
256
257 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
258 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
259 csk, &req->local_ip, ntohs(req->local_port),
260 &req->peer_ip, ntohs(req->peer_port),
261 csk->atid, csk->rss_qid);
262 }
263
264 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
265
266 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
267 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
268 csk->state, csk->flags, csk->atid, csk->rss_qid);
269
270 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
271 }
272
273 #if IS_ENABLED(CONFIG_IPV6)
274 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
275 struct l2t_entry *e)
276 {
277 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
278 int t4 = is_t4(lldi->adapter_type);
279 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
280 unsigned long long opt0;
281 unsigned int opt2;
282 unsigned int qid_atid = ((unsigned int)csk->atid) |
283 (((unsigned int)csk->rss_qid) << 14);
284
285 opt0 = KEEP_ALIVE_F |
286 WND_SCALE_V(wscale) |
287 MSS_IDX_V(csk->mss_idx) |
288 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
289 TX_CHAN_V(csk->tx_chan) |
290 SMAC_SEL_V(csk->smac_idx) |
291 ULP_MODE_V(ULP_MODE_ISCSI) |
292 RCV_BUFSIZ_V(csk->rcv_win >> 10);
293
294 opt2 = RX_CHANNEL_V(0) |
295 RSS_QUEUE_VALID_F |
296 RX_FC_DISABLE_F |
297 RSS_QUEUE_V(csk->rss_qid);
298
299 if (t4) {
300 struct cpl_act_open_req6 *req =
301 (struct cpl_act_open_req6 *)skb->head;
302
303 INIT_TP_WR(req, 0);
304 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
305 qid_atid));
306 req->local_port = csk->saddr6.sin6_port;
307 req->peer_port = csk->daddr6.sin6_port;
308
309 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
310 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
311 8);
312 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
313 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
314 8);
315
316 req->opt0 = cpu_to_be64(opt0);
317
318 opt2 |= RX_FC_VALID_F;
319 req->opt2 = cpu_to_be32(opt2);
320
321 req->params = cpu_to_be32(cxgb4_select_ntuple(
322 csk->cdev->ports[csk->port_id],
323 csk->l2t));
324 } else {
325 struct cpl_t5_act_open_req6 *req =
326 (struct cpl_t5_act_open_req6 *)skb->head;
327
328 INIT_TP_WR(req, 0);
329 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
330 qid_atid));
331 req->local_port = csk->saddr6.sin6_port;
332 req->peer_port = csk->daddr6.sin6_port;
333 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
334 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
335 8);
336 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
337 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
338 8);
339 req->opt0 = cpu_to_be64(opt0);
340
341 opt2 |= T5_OPT_2_VALID_F;
342 req->opt2 = cpu_to_be32(opt2);
343
344 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
345 csk->cdev->ports[csk->port_id],
346 csk->l2t)));
347 }
348
349 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
350
351 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
352 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
353 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
354 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
355 csk->rss_qid);
356
357 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
358 }
359 #endif
360
361 static void send_close_req(struct cxgbi_sock *csk)
362 {
363 struct sk_buff *skb = csk->cpl_close;
364 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
365 unsigned int tid = csk->tid;
366
367 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
368 "csk 0x%p,%u,0x%lx, tid %u.\n",
369 csk, csk->state, csk->flags, csk->tid);
370 csk->cpl_close = NULL;
371 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
372 INIT_TP_WR(req, tid);
373 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
374 req->rsvd = 0;
375
376 cxgbi_sock_skb_entail(csk, skb);
377 if (csk->state >= CTP_ESTABLISHED)
378 push_tx_frames(csk, 1);
379 }
380
381 static void abort_arp_failure(void *handle, struct sk_buff *skb)
382 {
383 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
384 struct cpl_abort_req *req;
385
386 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
387 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
388 csk, csk->state, csk->flags, csk->tid);
389 req = (struct cpl_abort_req *)skb->data;
390 req->cmd = CPL_ABORT_NO_RST;
391 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
392 }
393
394 static void send_abort_req(struct cxgbi_sock *csk)
395 {
396 struct cpl_abort_req *req;
397 struct sk_buff *skb = csk->cpl_abort_req;
398
399 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
400 return;
401
402 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
403 send_tx_flowc_wr(csk);
404 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
405 }
406
407 cxgbi_sock_set_state(csk, CTP_ABORTING);
408 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
409 cxgbi_sock_purge_write_queue(csk);
410
411 csk->cpl_abort_req = NULL;
412 req = (struct cpl_abort_req *)skb->head;
413 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
414 req->cmd = CPL_ABORT_SEND_RST;
415 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
416 INIT_TP_WR(req, csk->tid);
417 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
418 req->rsvd0 = htonl(csk->snd_nxt);
419 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
420
421 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
422 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
423 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
424 req->rsvd1);
425
426 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
427 }
428
429 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
430 {
431 struct sk_buff *skb = csk->cpl_abort_rpl;
432 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
433
434 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
435 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
436 csk, csk->state, csk->flags, csk->tid, rst_status);
437
438 csk->cpl_abort_rpl = NULL;
439 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
440 INIT_TP_WR(rpl, csk->tid);
441 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
442 rpl->cmd = rst_status;
443 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
444 }
445
446 /*
447 * CPL connection rx data ack: host ->
448 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
449 * credits sent.
450 */
451 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
452 {
453 struct sk_buff *skb;
454 struct cpl_rx_data_ack *req;
455
456 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
457 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
458 csk, csk->state, csk->flags, csk->tid, credits);
459
460 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
461 if (!skb) {
462 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
463 return 0;
464 }
465 req = (struct cpl_rx_data_ack *)skb->head;
466
467 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
468 INIT_TP_WR(req, csk->tid);
469 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
470 csk->tid));
471 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
472 | RX_FORCE_ACK_F);
473 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
474 return credits;
475 }
476
477 /*
478 * sgl_len - calculates the size of an SGL of the given capacity
479 * @n: the number of SGL entries
480 * Calculates the number of flits needed for a scatter/gather list that
481 * can hold the given number of entries.
482 */
483 static inline unsigned int sgl_len(unsigned int n)
484 {
485 n--;
486 return (3 * n) / 2 + (n & 1) + 2;
487 }
488
489 /*
490 * calc_tx_flits_ofld - calculate # of flits for an offload packet
491 * @skb: the packet
492 *
493 * Returns the number of flits needed for the given offload packet.
494 * These packets are already fully constructed and no additional headers
495 * will be added.
496 */
497 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
498 {
499 unsigned int flits, cnt;
500
501 if (is_ofld_imm(skb))
502 return DIV_ROUND_UP(skb->len, 8);
503 flits = skb_transport_offset(skb) / 8;
504 cnt = skb_shinfo(skb)->nr_frags;
505 if (skb_tail_pointer(skb) != skb_transport_header(skb))
506 cnt++;
507 return flits + sgl_len(cnt);
508 }
509
510 #define FLOWC_WR_NPARAMS_MIN 9
511 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
512 {
513 int nparams, flowclen16, flowclen;
514
515 nparams = FLOWC_WR_NPARAMS_MIN;
516 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
517 flowclen16 = DIV_ROUND_UP(flowclen, 16);
518 flowclen = flowclen16 * 16;
519 /*
520 * Return the number of 16-byte credits used by the FlowC request.
521 * Pass back the nparams and actual FlowC length if requested.
522 */
523 if (nparamsp)
524 *nparamsp = nparams;
525 if (flowclenp)
526 *flowclenp = flowclen;
527
528 return flowclen16;
529 }
530
531 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
532 {
533 struct sk_buff *skb;
534 struct fw_flowc_wr *flowc;
535 int nparams, flowclen16, flowclen;
536
537 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
538 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
539 flowc = (struct fw_flowc_wr *)skb->head;
540 flowc->op_to_nparams =
541 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
542 flowc->flowid_len16 =
543 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
544 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
545 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
546 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
547 flowc->mnemval[1].val = htonl(csk->tx_chan);
548 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
549 flowc->mnemval[2].val = htonl(csk->tx_chan);
550 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
551 flowc->mnemval[3].val = htonl(csk->rss_qid);
552 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
553 flowc->mnemval[4].val = htonl(csk->snd_nxt);
554 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
555 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
556 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
557 flowc->mnemval[6].val = htonl(csk->snd_win);
558 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
559 flowc->mnemval[7].val = htonl(csk->advmss);
560 flowc->mnemval[8].mnemonic = 0;
561 flowc->mnemval[8].val = 0;
562 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
563 flowc->mnemval[8].val = 16384;
564
565 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
566
567 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
568 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
569 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
570 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
571 csk->advmss);
572
573 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
574
575 return flowclen16;
576 }
577
578 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
579 int dlen, int len, u32 credits, int compl)
580 {
581 struct fw_ofld_tx_data_wr *req;
582 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
583 unsigned int wr_ulp_mode = 0, val;
584 bool imm = is_ofld_imm(skb);
585
586 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
587
588 if (imm) {
589 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
590 FW_WR_COMPL_F |
591 FW_WR_IMMDLEN_V(dlen));
592 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
593 FW_WR_LEN16_V(credits));
594 } else {
595 req->op_to_immdlen =
596 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
597 FW_WR_COMPL_F |
598 FW_WR_IMMDLEN_V(0));
599 req->flowid_len16 =
600 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
601 FW_WR_LEN16_V(credits));
602 }
603 if (submode)
604 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
605 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
606 val = skb_peek(&csk->write_queue) ? 0 : 1;
607 req->tunnel_to_proxy = htonl(wr_ulp_mode |
608 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
609 req->plen = htonl(len);
610 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
611 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
612 }
613
614 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
615 {
616 kfree_skb(skb);
617 }
618
619 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
620 {
621 int total_size = 0;
622 struct sk_buff *skb;
623
624 if (unlikely(csk->state < CTP_ESTABLISHED ||
625 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
626 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
627 1 << CXGBI_DBG_PDU_TX,
628 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
629 csk, csk->state, csk->flags, csk->tid);
630 return 0;
631 }
632
633 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
634 int dlen = skb->len;
635 int len = skb->len;
636 unsigned int credits_needed;
637 int flowclen16 = 0;
638
639 skb_reset_transport_header(skb);
640 if (is_ofld_imm(skb))
641 credits_needed = DIV_ROUND_UP(dlen, 16);
642 else
643 credits_needed = DIV_ROUND_UP(
644 8 * calc_tx_flits_ofld(skb),
645 16);
646
647 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
648 credits_needed += DIV_ROUND_UP(
649 sizeof(struct fw_ofld_tx_data_wr),
650 16);
651
652 /*
653 * Assumes the initial credits is large enough to support
654 * fw_flowc_wr plus largest possible first payload
655 */
656 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
657 flowclen16 = send_tx_flowc_wr(csk);
658 csk->wr_cred -= flowclen16;
659 csk->wr_una_cred += flowclen16;
660 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
661 }
662
663 if (csk->wr_cred < credits_needed) {
664 log_debug(1 << CXGBI_DBG_PDU_TX,
665 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
666 csk, skb->len, skb->data_len,
667 credits_needed, csk->wr_cred);
668 break;
669 }
670 __skb_unlink(skb, &csk->write_queue);
671 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
672 skb->csum = credits_needed + flowclen16;
673 csk->wr_cred -= credits_needed;
674 csk->wr_una_cred += credits_needed;
675 cxgbi_sock_enqueue_wr(csk, skb);
676
677 log_debug(1 << CXGBI_DBG_PDU_TX,
678 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
679 csk, skb->len, skb->data_len, credits_needed,
680 csk->wr_cred, csk->wr_una_cred);
681
682 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
683 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
684 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
685 req_completion);
686 csk->snd_nxt += len;
687 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
688 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
689 (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
690 struct cpl_close_con_req *req =
691 (struct cpl_close_con_req *)skb->data;
692 req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
693 }
694 total_size += skb->truesize;
695 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
696
697 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
698 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
699 csk, csk->state, csk->flags, csk->tid, skb, len);
700
701 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
702 }
703 return total_size;
704 }
705
706 static inline void free_atid(struct cxgbi_sock *csk)
707 {
708 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
709
710 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
711 cxgb4_free_atid(lldi->tids, csk->atid);
712 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
713 cxgbi_sock_put(csk);
714 }
715 }
716
717 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
718 {
719 struct cxgbi_sock *csk;
720 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
721 unsigned short tcp_opt = ntohs(req->tcp_opt);
722 unsigned int tid = GET_TID(req);
723 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
724 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
725 struct tid_info *t = lldi->tids;
726 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
727
728 csk = lookup_atid(t, atid);
729 if (unlikely(!csk)) {
730 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
731 goto rel_skb;
732 }
733
734 if (csk->atid != atid) {
735 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
736 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
737 goto rel_skb;
738 }
739
740 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
741 (&csk->saddr), (&csk->daddr),
742 atid, tid, csk, csk->state, csk->flags, rcv_isn);
743
744 module_put(THIS_MODULE);
745
746 cxgbi_sock_get(csk);
747 csk->tid = tid;
748 cxgb4_insert_tid(lldi->tids, csk, tid);
749 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
750
751 free_atid(csk);
752
753 spin_lock_bh(&csk->lock);
754 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
755 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
756 csk, csk->state, csk->flags, csk->tid);
757
758 if (csk->retry_timer.function) {
759 del_timer(&csk->retry_timer);
760 csk->retry_timer.function = NULL;
761 }
762
763 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
764 /*
765 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
766 * pass through opt0.
767 */
768 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
769 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
770
771 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
772 if (TCPOPT_TSTAMP_G(tcp_opt))
773 csk->advmss -= 12;
774 if (csk->advmss < 128)
775 csk->advmss = 128;
776
777 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
778 "csk 0x%p, mss_idx %u, advmss %u.\n",
779 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
780
781 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
782
783 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
784 send_abort_req(csk);
785 else {
786 if (skb_queue_len(&csk->write_queue))
787 push_tx_frames(csk, 0);
788 cxgbi_conn_tx_open(csk);
789 }
790 spin_unlock_bh(&csk->lock);
791
792 rel_skb:
793 __kfree_skb(skb);
794 }
795
796 static int act_open_rpl_status_to_errno(int status)
797 {
798 switch (status) {
799 case CPL_ERR_CONN_RESET:
800 return -ECONNREFUSED;
801 case CPL_ERR_ARP_MISS:
802 return -EHOSTUNREACH;
803 case CPL_ERR_CONN_TIMEDOUT:
804 return -ETIMEDOUT;
805 case CPL_ERR_TCAM_FULL:
806 return -ENOMEM;
807 case CPL_ERR_CONN_EXIST:
808 return -EADDRINUSE;
809 default:
810 return -EIO;
811 }
812 }
813
814 static void csk_act_open_retry_timer(unsigned long data)
815 {
816 struct sk_buff *skb = NULL;
817 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
818 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
819 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
820 struct l2t_entry *);
821 int t4 = is_t4(lldi->adapter_type), size, size6;
822
823 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
824 "csk 0x%p,%u,0x%lx,%u.\n",
825 csk, csk->state, csk->flags, csk->tid);
826
827 cxgbi_sock_get(csk);
828 spin_lock_bh(&csk->lock);
829
830 if (t4) {
831 size = sizeof(struct cpl_act_open_req);
832 size6 = sizeof(struct cpl_act_open_req6);
833 } else {
834 size = sizeof(struct cpl_t5_act_open_req);
835 size6 = sizeof(struct cpl_t5_act_open_req6);
836 }
837
838 if (csk->csk_family == AF_INET) {
839 send_act_open_func = send_act_open_req;
840 skb = alloc_wr(size, 0, GFP_ATOMIC);
841 #if IS_ENABLED(CONFIG_IPV6)
842 } else {
843 send_act_open_func = send_act_open_req6;
844 skb = alloc_wr(size6, 0, GFP_ATOMIC);
845 #endif
846 }
847
848 if (!skb)
849 cxgbi_sock_fail_act_open(csk, -ENOMEM);
850 else {
851 skb->sk = (struct sock *)csk;
852 t4_set_arp_err_handler(skb, csk,
853 cxgbi_sock_act_open_req_arp_failure);
854 send_act_open_func(csk, skb, csk->l2t);
855 }
856
857 spin_unlock_bh(&csk->lock);
858 cxgbi_sock_put(csk);
859
860 }
861
862 static inline bool is_neg_adv(unsigned int status)
863 {
864 return status == CPL_ERR_RTX_NEG_ADVICE ||
865 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
866 status == CPL_ERR_PERSIST_NEG_ADVICE;
867 }
868
869 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
870 {
871 struct cxgbi_sock *csk;
872 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
873 unsigned int tid = GET_TID(rpl);
874 unsigned int atid =
875 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
876 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
877 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
878 struct tid_info *t = lldi->tids;
879
880 csk = lookup_atid(t, atid);
881 if (unlikely(!csk)) {
882 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
883 goto rel_skb;
884 }
885
886 pr_info_ipaddr("tid %u/%u, status %u.\n"
887 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
888 atid, tid, status, csk, csk->state, csk->flags);
889
890 if (is_neg_adv(status))
891 goto rel_skb;
892
893 module_put(THIS_MODULE);
894
895 if (status && status != CPL_ERR_TCAM_FULL &&
896 status != CPL_ERR_CONN_EXIST &&
897 status != CPL_ERR_ARP_MISS)
898 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
899
900 cxgbi_sock_get(csk);
901 spin_lock_bh(&csk->lock);
902
903 if (status == CPL_ERR_CONN_EXIST &&
904 csk->retry_timer.function != csk_act_open_retry_timer) {
905 csk->retry_timer.function = csk_act_open_retry_timer;
906 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
907 } else
908 cxgbi_sock_fail_act_open(csk,
909 act_open_rpl_status_to_errno(status));
910
911 spin_unlock_bh(&csk->lock);
912 cxgbi_sock_put(csk);
913 rel_skb:
914 __kfree_skb(skb);
915 }
916
917 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
918 {
919 struct cxgbi_sock *csk;
920 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
921 unsigned int tid = GET_TID(req);
922 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
923 struct tid_info *t = lldi->tids;
924
925 csk = lookup_tid(t, tid);
926 if (unlikely(!csk)) {
927 pr_err("can't find connection for tid %u.\n", tid);
928 goto rel_skb;
929 }
930 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
931 (&csk->saddr), (&csk->daddr),
932 csk, csk->state, csk->flags, csk->tid);
933 cxgbi_sock_rcv_peer_close(csk);
934 rel_skb:
935 __kfree_skb(skb);
936 }
937
938 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
939 {
940 struct cxgbi_sock *csk;
941 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
942 unsigned int tid = GET_TID(rpl);
943 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
944 struct tid_info *t = lldi->tids;
945
946 csk = lookup_tid(t, tid);
947 if (unlikely(!csk)) {
948 pr_err("can't find connection for tid %u.\n", tid);
949 goto rel_skb;
950 }
951 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
952 (&csk->saddr), (&csk->daddr),
953 csk, csk->state, csk->flags, csk->tid);
954 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
955 rel_skb:
956 __kfree_skb(skb);
957 }
958
959 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
960 int *need_rst)
961 {
962 switch (abort_reason) {
963 case CPL_ERR_BAD_SYN: /* fall through */
964 case CPL_ERR_CONN_RESET:
965 return csk->state > CTP_ESTABLISHED ?
966 -EPIPE : -ECONNRESET;
967 case CPL_ERR_XMIT_TIMEDOUT:
968 case CPL_ERR_PERSIST_TIMEDOUT:
969 case CPL_ERR_FINWAIT2_TIMEDOUT:
970 case CPL_ERR_KEEPALIVE_TIMEDOUT:
971 return -ETIMEDOUT;
972 default:
973 return -EIO;
974 }
975 }
976
977 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
978 {
979 struct cxgbi_sock *csk;
980 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
981 unsigned int tid = GET_TID(req);
982 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
983 struct tid_info *t = lldi->tids;
984 int rst_status = CPL_ABORT_NO_RST;
985
986 csk = lookup_tid(t, tid);
987 if (unlikely(!csk)) {
988 pr_err("can't find connection for tid %u.\n", tid);
989 goto rel_skb;
990 }
991
992 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
993 (&csk->saddr), (&csk->daddr),
994 csk, csk->state, csk->flags, csk->tid, req->status);
995
996 if (is_neg_adv(req->status))
997 goto rel_skb;
998
999 cxgbi_sock_get(csk);
1000 spin_lock_bh(&csk->lock);
1001
1002 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1003
1004 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1005 send_tx_flowc_wr(csk);
1006 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1007 }
1008
1009 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1010 cxgbi_sock_set_state(csk, CTP_ABORTING);
1011
1012 send_abort_rpl(csk, rst_status);
1013
1014 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1015 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1016 cxgbi_sock_closed(csk);
1017 }
1018
1019 spin_unlock_bh(&csk->lock);
1020 cxgbi_sock_put(csk);
1021 rel_skb:
1022 __kfree_skb(skb);
1023 }
1024
1025 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1026 {
1027 struct cxgbi_sock *csk;
1028 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1029 unsigned int tid = GET_TID(rpl);
1030 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1031 struct tid_info *t = lldi->tids;
1032
1033 csk = lookup_tid(t, tid);
1034 if (!csk)
1035 goto rel_skb;
1036
1037 if (csk)
1038 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1039 (&csk->saddr), (&csk->daddr), csk,
1040 csk->state, csk->flags, csk->tid, rpl->status);
1041
1042 if (rpl->status == CPL_ERR_ABORT_FAILED)
1043 goto rel_skb;
1044
1045 cxgbi_sock_rcv_abort_rpl(csk);
1046 rel_skb:
1047 __kfree_skb(skb);
1048 }
1049
1050 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1051 {
1052 struct cxgbi_sock *csk;
1053 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1054 unsigned int tid = GET_TID(cpl);
1055 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1056 struct tid_info *t = lldi->tids;
1057
1058 csk = lookup_tid(t, tid);
1059 if (!csk) {
1060 pr_err("can't find connection for tid %u.\n", tid);
1061 } else {
1062 /* not expecting this, reset the connection. */
1063 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1064 spin_lock_bh(&csk->lock);
1065 send_abort_req(csk);
1066 spin_unlock_bh(&csk->lock);
1067 }
1068 __kfree_skb(skb);
1069 }
1070
1071 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1072 {
1073 struct cxgbi_sock *csk;
1074 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1075 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1076 unsigned int tid = GET_TID(cpl);
1077 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1078 struct tid_info *t = lldi->tids;
1079
1080 csk = lookup_tid(t, tid);
1081 if (unlikely(!csk)) {
1082 pr_err("can't find conn. for tid %u.\n", tid);
1083 goto rel_skb;
1084 }
1085
1086 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1087 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1088 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1089 pdu_len_ddp);
1090
1091 spin_lock_bh(&csk->lock);
1092
1093 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1094 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1095 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1096 csk, csk->state, csk->flags, csk->tid);
1097 if (csk->state != CTP_ABORTING)
1098 goto abort_conn;
1099 else
1100 goto discard;
1101 }
1102
1103 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1104 cxgbi_skcb_flags(skb) = 0;
1105
1106 skb_reset_transport_header(skb);
1107 __skb_pull(skb, sizeof(*cpl));
1108 __pskb_trim(skb, ntohs(cpl->len));
1109
1110 if (!csk->skb_ulp_lhdr) {
1111 unsigned char *bhs;
1112 unsigned int hlen, dlen, plen;
1113
1114 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1115 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1116 csk, csk->state, csk->flags, csk->tid, skb);
1117 csk->skb_ulp_lhdr = skb;
1118 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1119
1120 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1121 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1122 csk->tid, cxgbi_skcb_tcp_seq(skb),
1123 csk->rcv_nxt);
1124 goto abort_conn;
1125 }
1126
1127 bhs = skb->data;
1128 hlen = ntohs(cpl->len);
1129 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1130
1131 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1132 if (is_t4(lldi->adapter_type))
1133 plen -= 40;
1134
1135 if ((hlen + dlen) != plen) {
1136 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1137 "mismatch %u != %u + %u, seq 0x%x.\n",
1138 csk->tid, plen, hlen, dlen,
1139 cxgbi_skcb_tcp_seq(skb));
1140 goto abort_conn;
1141 }
1142
1143 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1144 if (dlen)
1145 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1146 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1147
1148 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1149 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1150 csk, skb, *bhs, hlen, dlen,
1151 ntohl(*((unsigned int *)(bhs + 16))),
1152 ntohl(*((unsigned int *)(bhs + 24))));
1153
1154 } else {
1155 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1156
1157 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1158 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1159 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1160 csk, csk->state, csk->flags, skb, lskb);
1161 }
1162
1163 __skb_queue_tail(&csk->receive_queue, skb);
1164 spin_unlock_bh(&csk->lock);
1165 return;
1166
1167 abort_conn:
1168 send_abort_req(csk);
1169 discard:
1170 spin_unlock_bh(&csk->lock);
1171 rel_skb:
1172 __kfree_skb(skb);
1173 }
1174
1175 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1176 struct sk_buff *skb)
1177 {
1178 struct cxgbi_sock *csk;
1179 struct sk_buff *lskb;
1180 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1181 unsigned int tid = GET_TID(rpl);
1182 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1183 struct tid_info *t = lldi->tids;
1184 unsigned int status = ntohl(rpl->ddpvld);
1185
1186 csk = lookup_tid(t, tid);
1187 if (unlikely(!csk)) {
1188 pr_err("can't find connection for tid %u.\n", tid);
1189 goto rel_skb;
1190 }
1191
1192 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1193 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1194 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1195
1196 spin_lock_bh(&csk->lock);
1197
1198 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1199 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1200 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1201 csk, csk->state, csk->flags, csk->tid);
1202 if (csk->state != CTP_ABORTING)
1203 goto abort_conn;
1204 else
1205 goto discard;
1206 }
1207
1208 if (!csk->skb_ulp_lhdr) {
1209 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1210 goto abort_conn;
1211 }
1212
1213 lskb = csk->skb_ulp_lhdr;
1214 csk->skb_ulp_lhdr = NULL;
1215
1216 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1217
1218 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1219 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1220 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1221
1222 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1223 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1224 csk, lskb, status, cxgbi_skcb_flags(lskb));
1225 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1226 }
1227 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1228 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1229 csk, lskb, status, cxgbi_skcb_flags(lskb));
1230 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1231 }
1232 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1233 log_debug(1 << CXGBI_DBG_PDU_RX,
1234 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1235 csk, lskb, status);
1236 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1237 }
1238 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1239 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1240 log_debug(1 << CXGBI_DBG_PDU_RX,
1241 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1242 csk, lskb, status);
1243 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1244 }
1245 log_debug(1 << CXGBI_DBG_PDU_RX,
1246 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1247 csk, lskb, cxgbi_skcb_flags(lskb));
1248
1249 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1250 cxgbi_conn_pdu_ready(csk);
1251 spin_unlock_bh(&csk->lock);
1252 goto rel_skb;
1253
1254 abort_conn:
1255 send_abort_req(csk);
1256 discard:
1257 spin_unlock_bh(&csk->lock);
1258 rel_skb:
1259 __kfree_skb(skb);
1260 }
1261
1262 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1263 {
1264 struct cxgbi_sock *csk;
1265 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1266 unsigned int tid = GET_TID(rpl);
1267 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1268 struct tid_info *t = lldi->tids;
1269
1270 csk = lookup_tid(t, tid);
1271 if (unlikely(!csk))
1272 pr_err("can't find connection for tid %u.\n", tid);
1273 else {
1274 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1275 "csk 0x%p,%u,0x%lx,%u.\n",
1276 csk, csk->state, csk->flags, csk->tid);
1277 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1278 rpl->seq_vld);
1279 }
1280 __kfree_skb(skb);
1281 }
1282
1283 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1284 {
1285 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1286 unsigned int tid = GET_TID(rpl);
1287 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1288 struct tid_info *t = lldi->tids;
1289 struct cxgbi_sock *csk;
1290
1291 csk = lookup_tid(t, tid);
1292 if (!csk)
1293 pr_err("can't find conn. for tid %u.\n", tid);
1294
1295 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1296 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1297 csk, csk->state, csk->flags, csk->tid, rpl->status);
1298
1299 if (rpl->status != CPL_ERR_NONE)
1300 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1301 csk, tid, rpl->status);
1302
1303 __kfree_skb(skb);
1304 }
1305
1306 static int alloc_cpls(struct cxgbi_sock *csk)
1307 {
1308 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1309 0, GFP_KERNEL);
1310 if (!csk->cpl_close)
1311 return -ENOMEM;
1312
1313 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1314 0, GFP_KERNEL);
1315 if (!csk->cpl_abort_req)
1316 goto free_cpls;
1317
1318 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1319 0, GFP_KERNEL);
1320 if (!csk->cpl_abort_rpl)
1321 goto free_cpls;
1322 return 0;
1323
1324 free_cpls:
1325 cxgbi_sock_free_cpl_skbs(csk);
1326 return -ENOMEM;
1327 }
1328
1329 static inline void l2t_put(struct cxgbi_sock *csk)
1330 {
1331 if (csk->l2t) {
1332 cxgb4_l2t_release(csk->l2t);
1333 csk->l2t = NULL;
1334 cxgbi_sock_put(csk);
1335 }
1336 }
1337
1338 static void release_offload_resources(struct cxgbi_sock *csk)
1339 {
1340 struct cxgb4_lld_info *lldi;
1341 #if IS_ENABLED(CONFIG_IPV6)
1342 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1343 #endif
1344
1345 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1346 "csk 0x%p,%u,0x%lx,%u.\n",
1347 csk, csk->state, csk->flags, csk->tid);
1348
1349 cxgbi_sock_free_cpl_skbs(csk);
1350 if (csk->wr_cred != csk->wr_max_cred) {
1351 cxgbi_sock_purge_wr_queue(csk);
1352 cxgbi_sock_reset_wr_list(csk);
1353 }
1354
1355 l2t_put(csk);
1356 #if IS_ENABLED(CONFIG_IPV6)
1357 if (csk->csk_family == AF_INET6)
1358 cxgb4_clip_release(ndev,
1359 (const u32 *)&csk->saddr6.sin6_addr, 1);
1360 #endif
1361
1362 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1363 free_atid(csk);
1364 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1365 lldi = cxgbi_cdev_priv(csk->cdev);
1366 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1367 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1368 cxgbi_sock_put(csk);
1369 }
1370 csk->dst = NULL;
1371 csk->cdev = NULL;
1372 }
1373
1374 static int init_act_open(struct cxgbi_sock *csk)
1375 {
1376 struct cxgbi_device *cdev = csk->cdev;
1377 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1378 struct net_device *ndev = cdev->ports[csk->port_id];
1379 struct sk_buff *skb = NULL;
1380 struct neighbour *n = NULL;
1381 void *daddr;
1382 unsigned int step;
1383 unsigned int size, size6;
1384 int t4 = is_t4(lldi->adapter_type);
1385 unsigned int linkspeed;
1386 unsigned int rcv_winf, snd_winf;
1387
1388 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1389 "csk 0x%p,%u,0x%lx,%u.\n",
1390 csk, csk->state, csk->flags, csk->tid);
1391
1392 if (csk->csk_family == AF_INET)
1393 daddr = &csk->daddr.sin_addr.s_addr;
1394 #if IS_ENABLED(CONFIG_IPV6)
1395 else if (csk->csk_family == AF_INET6)
1396 daddr = &csk->daddr6.sin6_addr;
1397 #endif
1398 else {
1399 pr_err("address family 0x%x not supported\n", csk->csk_family);
1400 goto rel_resource;
1401 }
1402
1403 n = dst_neigh_lookup(csk->dst, daddr);
1404
1405 if (!n) {
1406 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1407 goto rel_resource;
1408 }
1409
1410 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1411 if (csk->atid < 0) {
1412 pr_err("%s, NO atid available.\n", ndev->name);
1413 return -EINVAL;
1414 }
1415 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1416 cxgbi_sock_get(csk);
1417
1418 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1419 if (!csk->l2t) {
1420 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1421 goto rel_resource_without_clip;
1422 }
1423 cxgbi_sock_get(csk);
1424
1425 #if IS_ENABLED(CONFIG_IPV6)
1426 if (csk->csk_family == AF_INET6)
1427 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1428 #endif
1429
1430 if (t4) {
1431 size = sizeof(struct cpl_act_open_req);
1432 size6 = sizeof(struct cpl_act_open_req6);
1433 } else {
1434 size = sizeof(struct cpl_t5_act_open_req);
1435 size6 = sizeof(struct cpl_t5_act_open_req6);
1436 }
1437
1438 if (csk->csk_family == AF_INET)
1439 skb = alloc_wr(size, 0, GFP_NOIO);
1440 #if IS_ENABLED(CONFIG_IPV6)
1441 else
1442 skb = alloc_wr(size6, 0, GFP_NOIO);
1443 #endif
1444
1445 if (!skb)
1446 goto rel_resource;
1447 skb->sk = (struct sock *)csk;
1448 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1449
1450 if (!csk->mtu)
1451 csk->mtu = dst_mtu(csk->dst);
1452 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1453 csk->tx_chan = cxgb4_port_chan(ndev);
1454 /* SMT two entries per row */
1455 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1456 step = lldi->ntxq / lldi->nchan;
1457 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1458 step = lldi->nrxq / lldi->nchan;
1459 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1460 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1461 csk->snd_win = cxgb4i_snd_win;
1462 csk->rcv_win = cxgb4i_rcv_win;
1463 if (cxgb4i_rcv_win <= 0) {
1464 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1465 rcv_winf = linkspeed / SPEED_10000;
1466 if (rcv_winf)
1467 csk->rcv_win *= rcv_winf;
1468 }
1469 if (cxgb4i_snd_win <= 0) {
1470 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1471 snd_winf = linkspeed / SPEED_10000;
1472 if (snd_winf)
1473 csk->snd_win *= snd_winf;
1474 }
1475 csk->wr_cred = lldi->wr_cred -
1476 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1477 csk->wr_max_cred = csk->wr_cred;
1478 csk->wr_una_cred = 0;
1479 cxgbi_sock_reset_wr_list(csk);
1480 csk->err = 0;
1481
1482 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1483 (&csk->saddr), (&csk->daddr), csk, csk->state,
1484 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1485 csk->mtu, csk->mss_idx, csk->smac_idx);
1486
1487 /* must wait for either a act_open_rpl or act_open_establish */
1488 try_module_get(THIS_MODULE);
1489 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1490 if (csk->csk_family == AF_INET)
1491 send_act_open_req(csk, skb, csk->l2t);
1492 #if IS_ENABLED(CONFIG_IPV6)
1493 else
1494 send_act_open_req6(csk, skb, csk->l2t);
1495 #endif
1496 neigh_release(n);
1497
1498 return 0;
1499
1500 rel_resource:
1501 #if IS_ENABLED(CONFIG_IPV6)
1502 if (csk->csk_family == AF_INET6)
1503 cxgb4_clip_release(ndev,
1504 (const u32 *)&csk->saddr6.sin6_addr, 1);
1505 #endif
1506 rel_resource_without_clip:
1507 if (n)
1508 neigh_release(n);
1509 if (skb)
1510 __kfree_skb(skb);
1511 return -EINVAL;
1512 }
1513
1514 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1515 [CPL_ACT_ESTABLISH] = do_act_establish,
1516 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1517 [CPL_PEER_CLOSE] = do_peer_close,
1518 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1519 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1520 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1521 [CPL_FW4_ACK] = do_fw4_ack,
1522 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1523 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1524 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1525 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1526 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1527 [CPL_RX_DATA] = do_rx_data,
1528 };
1529
1530 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1531 {
1532 int rc;
1533
1534 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1535 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1536
1537 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1538 cxgb4i_max_connect);
1539 if (rc < 0)
1540 return rc;
1541
1542 cdev->csk_release_offload_resources = release_offload_resources;
1543 cdev->csk_push_tx_frames = push_tx_frames;
1544 cdev->csk_send_abort_req = send_abort_req;
1545 cdev->csk_send_close_req = send_close_req;
1546 cdev->csk_send_rx_credits = send_rx_credits;
1547 cdev->csk_alloc_cpls = alloc_cpls;
1548 cdev->csk_init_act_open = init_act_open;
1549
1550 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1551 return 0;
1552 }
1553
1554 static inline void
1555 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1556 struct ulp_mem_io *req,
1557 unsigned int wr_len, unsigned int dlen,
1558 unsigned int pm_addr,
1559 int tid)
1560 {
1561 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1562 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1563
1564 INIT_ULPTX_WR(req, wr_len, 0, tid);
1565 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1566 FW_WR_ATOMIC_V(0));
1567 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1568 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1569 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1570 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1571 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1572 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1573
1574 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1575 idata->len = htonl(dlen);
1576 }
1577
1578 static struct sk_buff *
1579 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1580 struct cxgbi_ppm *ppm,
1581 unsigned int idx, unsigned int npods,
1582 unsigned int tid)
1583 {
1584 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1585 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1586 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1587 sizeof(struct ulptx_idata) + dlen, 16);
1588 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1589
1590 if (!skb) {
1591 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1592 __func__, ppm->ndev->name, idx, npods);
1593 return NULL;
1594 }
1595
1596 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1597 pm_addr, tid);
1598
1599 return skb;
1600 }
1601
1602 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1603 struct cxgbi_task_tag_info *ttinfo,
1604 unsigned int idx, unsigned int npods,
1605 struct scatterlist **sg_pp,
1606 unsigned int *sg_off)
1607 {
1608 struct cxgbi_device *cdev = csk->cdev;
1609 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1610 csk->tid);
1611 struct ulp_mem_io *req;
1612 struct ulptx_idata *idata;
1613 struct cxgbi_pagepod *ppod;
1614 int i;
1615
1616 if (!skb)
1617 return -ENOMEM;
1618
1619 req = (struct ulp_mem_io *)skb->head;
1620 idata = (struct ulptx_idata *)(req + 1);
1621 ppod = (struct cxgbi_pagepod *)(idata + 1);
1622
1623 for (i = 0; i < npods; i++, ppod++)
1624 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1625
1626 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1627 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1628 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1629
1630 spin_lock_bh(&csk->lock);
1631 cxgbi_sock_skb_entail(csk, skb);
1632 spin_unlock_bh(&csk->lock);
1633
1634 return 0;
1635 }
1636
1637 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1638 struct cxgbi_task_tag_info *ttinfo)
1639 {
1640 unsigned int pidx = ttinfo->idx;
1641 unsigned int npods = ttinfo->npods;
1642 unsigned int i, cnt;
1643 int err = 0;
1644 struct scatterlist *sg = ttinfo->sgl;
1645 unsigned int offset = 0;
1646
1647 ttinfo->cid = csk->port_id;
1648
1649 for (i = 0; i < npods; i += cnt, pidx += cnt) {
1650 cnt = npods - i;
1651
1652 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1653 cnt = ULPMEM_IDATA_MAX_NPPODS;
1654 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1655 &sg, &offset);
1656 if (err < 0)
1657 break;
1658 }
1659
1660 return err;
1661 }
1662
1663 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1664 int pg_idx, bool reply)
1665 {
1666 struct sk_buff *skb;
1667 struct cpl_set_tcb_field *req;
1668
1669 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1670 return 0;
1671
1672 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1673 if (!skb)
1674 return -ENOMEM;
1675
1676 /* set up ulp page size */
1677 req = (struct cpl_set_tcb_field *)skb->head;
1678 INIT_TP_WR(req, csk->tid);
1679 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1680 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1681 req->word_cookie = htons(0);
1682 req->mask = cpu_to_be64(0x3 << 8);
1683 req->val = cpu_to_be64(pg_idx << 8);
1684 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1685
1686 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1687 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1688
1689 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1690 return 0;
1691 }
1692
1693 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1694 int hcrc, int dcrc, int reply)
1695 {
1696 struct sk_buff *skb;
1697 struct cpl_set_tcb_field *req;
1698
1699 if (!hcrc && !dcrc)
1700 return 0;
1701
1702 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1703 if (!skb)
1704 return -ENOMEM;
1705
1706 csk->hcrc_len = (hcrc ? 4 : 0);
1707 csk->dcrc_len = (dcrc ? 4 : 0);
1708 /* set up ulp submode */
1709 req = (struct cpl_set_tcb_field *)skb->head;
1710 INIT_TP_WR(req, tid);
1711 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1712 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1713 req->word_cookie = htons(0);
1714 req->mask = cpu_to_be64(0x3 << 4);
1715 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1716 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1717 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1718
1719 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1720 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1721
1722 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1723 return 0;
1724 }
1725
1726 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
1727 {
1728 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
1729 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
1730 }
1731
1732 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1733 {
1734 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1735 struct net_device *ndev = cdev->ports[0];
1736 struct cxgbi_tag_format tformat;
1737 unsigned int ppmax;
1738 int i;
1739
1740 if (!lldi->vr->iscsi.size) {
1741 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
1742 return -EACCES;
1743 }
1744
1745 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
1746 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
1747
1748 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
1749 for (i = 0; i < 4; i++)
1750 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
1751 & 0xF;
1752 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
1753
1754 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
1755 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
1756
1757 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1758 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1759 cdev->csk_ddp_set_map = ddp_set_map;
1760 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1761 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1762 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1763 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1764 cdev->cdev2ppm = cdev2ppm;
1765
1766 return 0;
1767 }
1768
1769 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1770 {
1771 struct cxgbi_device *cdev;
1772 struct port_info *pi;
1773 int i, rc;
1774
1775 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1776 if (!cdev) {
1777 pr_info("t4 device 0x%p, register failed.\n", lldi);
1778 return NULL;
1779 }
1780 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1781 cdev, lldi->adapter_type, lldi->nports,
1782 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1783 lldi->nrxq, lldi->wr_cred);
1784 for (i = 0; i < lldi->nrxq; i++)
1785 log_debug(1 << CXGBI_DBG_DEV,
1786 "t4 0x%p, rxq id #%d: %u.\n",
1787 cdev, i, lldi->rxq_ids[i]);
1788
1789 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1790 cdev->flags = CXGBI_FLAG_DEV_T4;
1791 cdev->pdev = lldi->pdev;
1792 cdev->ports = lldi->ports;
1793 cdev->nports = lldi->nports;
1794 cdev->mtus = lldi->mtus;
1795 cdev->nmtus = NMTUS;
1796 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1797 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1798 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1799 cdev->itp = &cxgb4i_iscsi_transport;
1800
1801 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
1802 << FW_VIID_PFN_S;
1803 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1804 cdev, lldi->ports[0]->name, cdev->pfvf);
1805
1806 rc = cxgb4i_ddp_init(cdev);
1807 if (rc) {
1808 pr_info("t4 0x%p ddp init failed.\n", cdev);
1809 goto err_out;
1810 }
1811 rc = cxgb4i_ofld_init(cdev);
1812 if (rc) {
1813 pr_info("t4 0x%p ofld init failed.\n", cdev);
1814 goto err_out;
1815 }
1816
1817 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1818 &cxgb4i_host_template, cxgb4i_stt);
1819 if (rc)
1820 goto err_out;
1821
1822 for (i = 0; i < cdev->nports; i++) {
1823 pi = netdev_priv(lldi->ports[i]);
1824 cdev->hbas[i]->port_id = pi->port_id;
1825 }
1826 return cdev;
1827
1828 err_out:
1829 cxgbi_device_unregister(cdev);
1830 return ERR_PTR(-ENOMEM);
1831 }
1832
1833 #define RX_PULL_LEN 128
1834 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1835 const struct pkt_gl *pgl)
1836 {
1837 const struct cpl_act_establish *rpl;
1838 struct sk_buff *skb;
1839 unsigned int opc;
1840 struct cxgbi_device *cdev = handle;
1841
1842 if (pgl == NULL) {
1843 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1844
1845 skb = alloc_wr(len, 0, GFP_ATOMIC);
1846 if (!skb)
1847 goto nomem;
1848 skb_copy_to_linear_data(skb, &rsp[1], len);
1849 } else {
1850 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1851 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1852 pgl->va, be64_to_cpu(*rsp),
1853 be64_to_cpu(*(u64 *)pgl->va),
1854 pgl->tot_len);
1855 return 0;
1856 }
1857 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1858 if (unlikely(!skb))
1859 goto nomem;
1860 }
1861
1862 rpl = (struct cpl_act_establish *)skb->data;
1863 opc = rpl->ot.opcode;
1864 log_debug(1 << CXGBI_DBG_TOE,
1865 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1866 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1867 if (cxgb4i_cplhandlers[opc])
1868 cxgb4i_cplhandlers[opc](cdev, skb);
1869 else {
1870 pr_err("No handler for opcode 0x%x.\n", opc);
1871 __kfree_skb(skb);
1872 }
1873 return 0;
1874 nomem:
1875 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1876 return 1;
1877 }
1878
1879 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1880 {
1881 struct cxgbi_device *cdev = handle;
1882
1883 switch (state) {
1884 case CXGB4_STATE_UP:
1885 pr_info("cdev 0x%p, UP.\n", cdev);
1886 break;
1887 case CXGB4_STATE_START_RECOVERY:
1888 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1889 /* close all connections */
1890 break;
1891 case CXGB4_STATE_DOWN:
1892 pr_info("cdev 0x%p, DOWN.\n", cdev);
1893 break;
1894 case CXGB4_STATE_DETACH:
1895 pr_info("cdev 0x%p, DETACH.\n", cdev);
1896 cxgbi_device_unregister(cdev);
1897 break;
1898 default:
1899 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1900 break;
1901 }
1902 return 0;
1903 }
1904
1905 static int __init cxgb4i_init_module(void)
1906 {
1907 int rc;
1908
1909 printk(KERN_INFO "%s", version);
1910
1911 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1912 if (rc < 0)
1913 return rc;
1914 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1915
1916 return 0;
1917 }
1918
1919 static void __exit cxgb4i_exit_module(void)
1920 {
1921 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1922 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1923 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1924 }
1925
1926 module_init(cxgb4i_init_module);
1927 module_exit(cxgb4i_exit_module);
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