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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
[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 }
689 total_size += skb->truesize;
690 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
691
692 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
693 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
694 csk, csk->state, csk->flags, csk->tid, skb, len);
695
696 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
697 }
698 return total_size;
699 }
700
701 static inline void free_atid(struct cxgbi_sock *csk)
702 {
703 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
704
705 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
706 cxgb4_free_atid(lldi->tids, csk->atid);
707 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
708 cxgbi_sock_put(csk);
709 }
710 }
711
712 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
713 {
714 struct cxgbi_sock *csk;
715 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
716 unsigned short tcp_opt = ntohs(req->tcp_opt);
717 unsigned int tid = GET_TID(req);
718 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
719 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
720 struct tid_info *t = lldi->tids;
721 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
722
723 csk = lookup_atid(t, atid);
724 if (unlikely(!csk)) {
725 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
726 goto rel_skb;
727 }
728
729 if (csk->atid != atid) {
730 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
731 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
732 goto rel_skb;
733 }
734
735 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
736 (&csk->saddr), (&csk->daddr),
737 atid, tid, csk, csk->state, csk->flags, rcv_isn);
738
739 module_put(THIS_MODULE);
740
741 cxgbi_sock_get(csk);
742 csk->tid = tid;
743 cxgb4_insert_tid(lldi->tids, csk, tid);
744 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
745
746 free_atid(csk);
747
748 spin_lock_bh(&csk->lock);
749 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
750 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
751 csk, csk->state, csk->flags, csk->tid);
752
753 if (csk->retry_timer.function) {
754 del_timer(&csk->retry_timer);
755 csk->retry_timer.function = NULL;
756 }
757
758 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
759 /*
760 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
761 * pass through opt0.
762 */
763 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
764 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
765
766 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
767 if (TCPOPT_TSTAMP_G(tcp_opt))
768 csk->advmss -= 12;
769 if (csk->advmss < 128)
770 csk->advmss = 128;
771
772 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
773 "csk 0x%p, mss_idx %u, advmss %u.\n",
774 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
775
776 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
777
778 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
779 send_abort_req(csk);
780 else {
781 if (skb_queue_len(&csk->write_queue))
782 push_tx_frames(csk, 0);
783 cxgbi_conn_tx_open(csk);
784 }
785 spin_unlock_bh(&csk->lock);
786
787 rel_skb:
788 __kfree_skb(skb);
789 }
790
791 static int act_open_rpl_status_to_errno(int status)
792 {
793 switch (status) {
794 case CPL_ERR_CONN_RESET:
795 return -ECONNREFUSED;
796 case CPL_ERR_ARP_MISS:
797 return -EHOSTUNREACH;
798 case CPL_ERR_CONN_TIMEDOUT:
799 return -ETIMEDOUT;
800 case CPL_ERR_TCAM_FULL:
801 return -ENOMEM;
802 case CPL_ERR_CONN_EXIST:
803 return -EADDRINUSE;
804 default:
805 return -EIO;
806 }
807 }
808
809 static void csk_act_open_retry_timer(unsigned long data)
810 {
811 struct sk_buff *skb = NULL;
812 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
813 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
814 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
815 struct l2t_entry *);
816 int t4 = is_t4(lldi->adapter_type), size, size6;
817
818 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
819 "csk 0x%p,%u,0x%lx,%u.\n",
820 csk, csk->state, csk->flags, csk->tid);
821
822 cxgbi_sock_get(csk);
823 spin_lock_bh(&csk->lock);
824
825 if (t4) {
826 size = sizeof(struct cpl_act_open_req);
827 size6 = sizeof(struct cpl_act_open_req6);
828 } else {
829 size = sizeof(struct cpl_t5_act_open_req);
830 size6 = sizeof(struct cpl_t5_act_open_req6);
831 }
832
833 if (csk->csk_family == AF_INET) {
834 send_act_open_func = send_act_open_req;
835 skb = alloc_wr(size, 0, GFP_ATOMIC);
836 #if IS_ENABLED(CONFIG_IPV6)
837 } else {
838 send_act_open_func = send_act_open_req6;
839 skb = alloc_wr(size6, 0, GFP_ATOMIC);
840 #endif
841 }
842
843 if (!skb)
844 cxgbi_sock_fail_act_open(csk, -ENOMEM);
845 else {
846 skb->sk = (struct sock *)csk;
847 t4_set_arp_err_handler(skb, csk,
848 cxgbi_sock_act_open_req_arp_failure);
849 send_act_open_func(csk, skb, csk->l2t);
850 }
851
852 spin_unlock_bh(&csk->lock);
853 cxgbi_sock_put(csk);
854
855 }
856
857 static inline bool is_neg_adv(unsigned int status)
858 {
859 return status == CPL_ERR_RTX_NEG_ADVICE ||
860 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
861 status == CPL_ERR_PERSIST_NEG_ADVICE;
862 }
863
864 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
865 {
866 struct cxgbi_sock *csk;
867 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
868 unsigned int tid = GET_TID(rpl);
869 unsigned int atid =
870 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
871 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
872 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
873 struct tid_info *t = lldi->tids;
874
875 csk = lookup_atid(t, atid);
876 if (unlikely(!csk)) {
877 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
878 goto rel_skb;
879 }
880
881 pr_info_ipaddr("tid %u/%u, status %u.\n"
882 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
883 atid, tid, status, csk, csk->state, csk->flags);
884
885 if (is_neg_adv(status))
886 goto rel_skb;
887
888 module_put(THIS_MODULE);
889
890 if (status && status != CPL_ERR_TCAM_FULL &&
891 status != CPL_ERR_CONN_EXIST &&
892 status != CPL_ERR_ARP_MISS)
893 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
894
895 cxgbi_sock_get(csk);
896 spin_lock_bh(&csk->lock);
897
898 if (status == CPL_ERR_CONN_EXIST &&
899 csk->retry_timer.function != csk_act_open_retry_timer) {
900 csk->retry_timer.function = csk_act_open_retry_timer;
901 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
902 } else
903 cxgbi_sock_fail_act_open(csk,
904 act_open_rpl_status_to_errno(status));
905
906 spin_unlock_bh(&csk->lock);
907 cxgbi_sock_put(csk);
908 rel_skb:
909 __kfree_skb(skb);
910 }
911
912 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
913 {
914 struct cxgbi_sock *csk;
915 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
916 unsigned int tid = GET_TID(req);
917 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
918 struct tid_info *t = lldi->tids;
919
920 csk = lookup_tid(t, tid);
921 if (unlikely(!csk)) {
922 pr_err("can't find connection for tid %u.\n", tid);
923 goto rel_skb;
924 }
925 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
926 (&csk->saddr), (&csk->daddr),
927 csk, csk->state, csk->flags, csk->tid);
928 cxgbi_sock_rcv_peer_close(csk);
929 rel_skb:
930 __kfree_skb(skb);
931 }
932
933 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
934 {
935 struct cxgbi_sock *csk;
936 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
937 unsigned int tid = GET_TID(rpl);
938 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
939 struct tid_info *t = lldi->tids;
940
941 csk = lookup_tid(t, tid);
942 if (unlikely(!csk)) {
943 pr_err("can't find connection for tid %u.\n", tid);
944 goto rel_skb;
945 }
946 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
947 (&csk->saddr), (&csk->daddr),
948 csk, csk->state, csk->flags, csk->tid);
949 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
950 rel_skb:
951 __kfree_skb(skb);
952 }
953
954 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
955 int *need_rst)
956 {
957 switch (abort_reason) {
958 case CPL_ERR_BAD_SYN: /* fall through */
959 case CPL_ERR_CONN_RESET:
960 return csk->state > CTP_ESTABLISHED ?
961 -EPIPE : -ECONNRESET;
962 case CPL_ERR_XMIT_TIMEDOUT:
963 case CPL_ERR_PERSIST_TIMEDOUT:
964 case CPL_ERR_FINWAIT2_TIMEDOUT:
965 case CPL_ERR_KEEPALIVE_TIMEDOUT:
966 return -ETIMEDOUT;
967 default:
968 return -EIO;
969 }
970 }
971
972 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
973 {
974 struct cxgbi_sock *csk;
975 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
976 unsigned int tid = GET_TID(req);
977 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
978 struct tid_info *t = lldi->tids;
979 int rst_status = CPL_ABORT_NO_RST;
980
981 csk = lookup_tid(t, tid);
982 if (unlikely(!csk)) {
983 pr_err("can't find connection for tid %u.\n", tid);
984 goto rel_skb;
985 }
986
987 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
988 (&csk->saddr), (&csk->daddr),
989 csk, csk->state, csk->flags, csk->tid, req->status);
990
991 if (is_neg_adv(req->status))
992 goto rel_skb;
993
994 cxgbi_sock_get(csk);
995 spin_lock_bh(&csk->lock);
996
997 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
998
999 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1000 send_tx_flowc_wr(csk);
1001 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1002 }
1003
1004 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1005 cxgbi_sock_set_state(csk, CTP_ABORTING);
1006
1007 send_abort_rpl(csk, rst_status);
1008
1009 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1010 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1011 cxgbi_sock_closed(csk);
1012 }
1013
1014 spin_unlock_bh(&csk->lock);
1015 cxgbi_sock_put(csk);
1016 rel_skb:
1017 __kfree_skb(skb);
1018 }
1019
1020 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1021 {
1022 struct cxgbi_sock *csk;
1023 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1024 unsigned int tid = GET_TID(rpl);
1025 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1026 struct tid_info *t = lldi->tids;
1027
1028 csk = lookup_tid(t, tid);
1029 if (!csk)
1030 goto rel_skb;
1031
1032 if (csk)
1033 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1034 (&csk->saddr), (&csk->daddr), csk,
1035 csk->state, csk->flags, csk->tid, rpl->status);
1036
1037 if (rpl->status == CPL_ERR_ABORT_FAILED)
1038 goto rel_skb;
1039
1040 cxgbi_sock_rcv_abort_rpl(csk);
1041 rel_skb:
1042 __kfree_skb(skb);
1043 }
1044
1045 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1046 {
1047 struct cxgbi_sock *csk;
1048 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1049 unsigned int tid = GET_TID(cpl);
1050 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1051 struct tid_info *t = lldi->tids;
1052
1053 csk = lookup_tid(t, tid);
1054 if (!csk) {
1055 pr_err("can't find connection for tid %u.\n", tid);
1056 } else {
1057 /* not expecting this, reset the connection. */
1058 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1059 spin_lock_bh(&csk->lock);
1060 send_abort_req(csk);
1061 spin_unlock_bh(&csk->lock);
1062 }
1063 __kfree_skb(skb);
1064 }
1065
1066 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1067 {
1068 struct cxgbi_sock *csk;
1069 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1070 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1071 unsigned int tid = GET_TID(cpl);
1072 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1073 struct tid_info *t = lldi->tids;
1074
1075 csk = lookup_tid(t, tid);
1076 if (unlikely(!csk)) {
1077 pr_err("can't find conn. for tid %u.\n", tid);
1078 goto rel_skb;
1079 }
1080
1081 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1082 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1083 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1084 pdu_len_ddp);
1085
1086 spin_lock_bh(&csk->lock);
1087
1088 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1089 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1090 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1091 csk, csk->state, csk->flags, csk->tid);
1092 if (csk->state != CTP_ABORTING)
1093 goto abort_conn;
1094 else
1095 goto discard;
1096 }
1097
1098 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1099 cxgbi_skcb_flags(skb) = 0;
1100
1101 skb_reset_transport_header(skb);
1102 __skb_pull(skb, sizeof(*cpl));
1103 __pskb_trim(skb, ntohs(cpl->len));
1104
1105 if (!csk->skb_ulp_lhdr) {
1106 unsigned char *bhs;
1107 unsigned int hlen, dlen, plen;
1108
1109 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1110 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1111 csk, csk->state, csk->flags, csk->tid, skb);
1112 csk->skb_ulp_lhdr = skb;
1113 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1114
1115 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1116 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1117 csk->tid, cxgbi_skcb_tcp_seq(skb),
1118 csk->rcv_nxt);
1119 goto abort_conn;
1120 }
1121
1122 bhs = skb->data;
1123 hlen = ntohs(cpl->len);
1124 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1125
1126 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1127 if (is_t4(lldi->adapter_type))
1128 plen -= 40;
1129
1130 if ((hlen + dlen) != plen) {
1131 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1132 "mismatch %u != %u + %u, seq 0x%x.\n",
1133 csk->tid, plen, hlen, dlen,
1134 cxgbi_skcb_tcp_seq(skb));
1135 goto abort_conn;
1136 }
1137
1138 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1139 if (dlen)
1140 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1141 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1142
1143 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1144 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1145 csk, skb, *bhs, hlen, dlen,
1146 ntohl(*((unsigned int *)(bhs + 16))),
1147 ntohl(*((unsigned int *)(bhs + 24))));
1148
1149 } else {
1150 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1151
1152 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1153 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1154 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1155 csk, csk->state, csk->flags, skb, lskb);
1156 }
1157
1158 __skb_queue_tail(&csk->receive_queue, skb);
1159 spin_unlock_bh(&csk->lock);
1160 return;
1161
1162 abort_conn:
1163 send_abort_req(csk);
1164 discard:
1165 spin_unlock_bh(&csk->lock);
1166 rel_skb:
1167 __kfree_skb(skb);
1168 }
1169
1170 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1171 struct sk_buff *skb)
1172 {
1173 struct cxgbi_sock *csk;
1174 struct sk_buff *lskb;
1175 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1176 unsigned int tid = GET_TID(rpl);
1177 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1178 struct tid_info *t = lldi->tids;
1179 unsigned int status = ntohl(rpl->ddpvld);
1180
1181 csk = lookup_tid(t, tid);
1182 if (unlikely(!csk)) {
1183 pr_err("can't find connection for tid %u.\n", tid);
1184 goto rel_skb;
1185 }
1186
1187 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1188 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1189 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1190
1191 spin_lock_bh(&csk->lock);
1192
1193 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1194 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1195 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1196 csk, csk->state, csk->flags, csk->tid);
1197 if (csk->state != CTP_ABORTING)
1198 goto abort_conn;
1199 else
1200 goto discard;
1201 }
1202
1203 if (!csk->skb_ulp_lhdr) {
1204 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1205 goto abort_conn;
1206 }
1207
1208 lskb = csk->skb_ulp_lhdr;
1209 csk->skb_ulp_lhdr = NULL;
1210
1211 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1212
1213 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1214 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1215 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1216
1217 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1218 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1219 csk, lskb, status, cxgbi_skcb_flags(lskb));
1220 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1221 }
1222 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1223 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1224 csk, lskb, status, cxgbi_skcb_flags(lskb));
1225 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1226 }
1227 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1228 log_debug(1 << CXGBI_DBG_PDU_RX,
1229 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1230 csk, lskb, status);
1231 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1232 }
1233 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1234 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1235 log_debug(1 << CXGBI_DBG_PDU_RX,
1236 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1237 csk, lskb, status);
1238 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1239 }
1240 log_debug(1 << CXGBI_DBG_PDU_RX,
1241 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1242 csk, lskb, cxgbi_skcb_flags(lskb));
1243
1244 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1245 cxgbi_conn_pdu_ready(csk);
1246 spin_unlock_bh(&csk->lock);
1247 goto rel_skb;
1248
1249 abort_conn:
1250 send_abort_req(csk);
1251 discard:
1252 spin_unlock_bh(&csk->lock);
1253 rel_skb:
1254 __kfree_skb(skb);
1255 }
1256
1257 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1258 {
1259 struct cxgbi_sock *csk;
1260 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1261 unsigned int tid = GET_TID(rpl);
1262 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1263 struct tid_info *t = lldi->tids;
1264
1265 csk = lookup_tid(t, tid);
1266 if (unlikely(!csk))
1267 pr_err("can't find connection for tid %u.\n", tid);
1268 else {
1269 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1270 "csk 0x%p,%u,0x%lx,%u.\n",
1271 csk, csk->state, csk->flags, csk->tid);
1272 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1273 rpl->seq_vld);
1274 }
1275 __kfree_skb(skb);
1276 }
1277
1278 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1279 {
1280 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1281 unsigned int tid = GET_TID(rpl);
1282 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1283 struct tid_info *t = lldi->tids;
1284 struct cxgbi_sock *csk;
1285
1286 csk = lookup_tid(t, tid);
1287 if (!csk)
1288 pr_err("can't find conn. for tid %u.\n", tid);
1289
1290 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1291 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1292 csk, csk->state, csk->flags, csk->tid, rpl->status);
1293
1294 if (rpl->status != CPL_ERR_NONE)
1295 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1296 csk, tid, rpl->status);
1297
1298 __kfree_skb(skb);
1299 }
1300
1301 static int alloc_cpls(struct cxgbi_sock *csk)
1302 {
1303 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1304 0, GFP_KERNEL);
1305 if (!csk->cpl_close)
1306 return -ENOMEM;
1307
1308 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1309 0, GFP_KERNEL);
1310 if (!csk->cpl_abort_req)
1311 goto free_cpls;
1312
1313 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1314 0, GFP_KERNEL);
1315 if (!csk->cpl_abort_rpl)
1316 goto free_cpls;
1317 return 0;
1318
1319 free_cpls:
1320 cxgbi_sock_free_cpl_skbs(csk);
1321 return -ENOMEM;
1322 }
1323
1324 static inline void l2t_put(struct cxgbi_sock *csk)
1325 {
1326 if (csk->l2t) {
1327 cxgb4_l2t_release(csk->l2t);
1328 csk->l2t = NULL;
1329 cxgbi_sock_put(csk);
1330 }
1331 }
1332
1333 static void release_offload_resources(struct cxgbi_sock *csk)
1334 {
1335 struct cxgb4_lld_info *lldi;
1336 #if IS_ENABLED(CONFIG_IPV6)
1337 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1338 #endif
1339
1340 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1341 "csk 0x%p,%u,0x%lx,%u.\n",
1342 csk, csk->state, csk->flags, csk->tid);
1343
1344 cxgbi_sock_free_cpl_skbs(csk);
1345 if (csk->wr_cred != csk->wr_max_cred) {
1346 cxgbi_sock_purge_wr_queue(csk);
1347 cxgbi_sock_reset_wr_list(csk);
1348 }
1349
1350 l2t_put(csk);
1351 #if IS_ENABLED(CONFIG_IPV6)
1352 if (csk->csk_family == AF_INET6)
1353 cxgb4_clip_release(ndev,
1354 (const u32 *)&csk->saddr6.sin6_addr, 1);
1355 #endif
1356
1357 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1358 free_atid(csk);
1359 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1360 lldi = cxgbi_cdev_priv(csk->cdev);
1361 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1362 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1363 cxgbi_sock_put(csk);
1364 }
1365 csk->dst = NULL;
1366 csk->cdev = NULL;
1367 }
1368
1369 static int init_act_open(struct cxgbi_sock *csk)
1370 {
1371 struct cxgbi_device *cdev = csk->cdev;
1372 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1373 struct net_device *ndev = cdev->ports[csk->port_id];
1374 struct sk_buff *skb = NULL;
1375 struct neighbour *n = NULL;
1376 void *daddr;
1377 unsigned int step;
1378 unsigned int size, size6;
1379 int t4 = is_t4(lldi->adapter_type);
1380 unsigned int linkspeed;
1381 unsigned int rcv_winf, snd_winf;
1382
1383 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1384 "csk 0x%p,%u,0x%lx,%u.\n",
1385 csk, csk->state, csk->flags, csk->tid);
1386
1387 if (csk->csk_family == AF_INET)
1388 daddr = &csk->daddr.sin_addr.s_addr;
1389 #if IS_ENABLED(CONFIG_IPV6)
1390 else if (csk->csk_family == AF_INET6)
1391 daddr = &csk->daddr6.sin6_addr;
1392 #endif
1393 else {
1394 pr_err("address family 0x%x not supported\n", csk->csk_family);
1395 goto rel_resource;
1396 }
1397
1398 n = dst_neigh_lookup(csk->dst, daddr);
1399
1400 if (!n) {
1401 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1402 goto rel_resource;
1403 }
1404
1405 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1406 if (csk->atid < 0) {
1407 pr_err("%s, NO atid available.\n", ndev->name);
1408 return -EINVAL;
1409 }
1410 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1411 cxgbi_sock_get(csk);
1412
1413 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1414 if (!csk->l2t) {
1415 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1416 goto rel_resource_without_clip;
1417 }
1418 cxgbi_sock_get(csk);
1419
1420 #if IS_ENABLED(CONFIG_IPV6)
1421 if (csk->csk_family == AF_INET6)
1422 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1423 #endif
1424
1425 if (t4) {
1426 size = sizeof(struct cpl_act_open_req);
1427 size6 = sizeof(struct cpl_act_open_req6);
1428 } else {
1429 size = sizeof(struct cpl_t5_act_open_req);
1430 size6 = sizeof(struct cpl_t5_act_open_req6);
1431 }
1432
1433 if (csk->csk_family == AF_INET)
1434 skb = alloc_wr(size, 0, GFP_NOIO);
1435 #if IS_ENABLED(CONFIG_IPV6)
1436 else
1437 skb = alloc_wr(size6, 0, GFP_NOIO);
1438 #endif
1439
1440 if (!skb)
1441 goto rel_resource;
1442 skb->sk = (struct sock *)csk;
1443 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1444
1445 if (!csk->mtu)
1446 csk->mtu = dst_mtu(csk->dst);
1447 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1448 csk->tx_chan = cxgb4_port_chan(ndev);
1449 /* SMT two entries per row */
1450 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1451 step = lldi->ntxq / lldi->nchan;
1452 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1453 step = lldi->nrxq / lldi->nchan;
1454 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1455 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1456 csk->snd_win = cxgb4i_snd_win;
1457 csk->rcv_win = cxgb4i_rcv_win;
1458 if (cxgb4i_rcv_win <= 0) {
1459 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1460 rcv_winf = linkspeed / SPEED_10000;
1461 if (rcv_winf)
1462 csk->rcv_win *= rcv_winf;
1463 }
1464 if (cxgb4i_snd_win <= 0) {
1465 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1466 snd_winf = linkspeed / SPEED_10000;
1467 if (snd_winf)
1468 csk->snd_win *= snd_winf;
1469 }
1470 csk->wr_cred = lldi->wr_cred -
1471 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1472 csk->wr_max_cred = csk->wr_cred;
1473 csk->wr_una_cred = 0;
1474 cxgbi_sock_reset_wr_list(csk);
1475 csk->err = 0;
1476
1477 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1478 (&csk->saddr), (&csk->daddr), csk, csk->state,
1479 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1480 csk->mtu, csk->mss_idx, csk->smac_idx);
1481
1482 /* must wait for either a act_open_rpl or act_open_establish */
1483 try_module_get(THIS_MODULE);
1484 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1485 if (csk->csk_family == AF_INET)
1486 send_act_open_req(csk, skb, csk->l2t);
1487 #if IS_ENABLED(CONFIG_IPV6)
1488 else
1489 send_act_open_req6(csk, skb, csk->l2t);
1490 #endif
1491 neigh_release(n);
1492
1493 return 0;
1494
1495 rel_resource:
1496 #if IS_ENABLED(CONFIG_IPV6)
1497 if (csk->csk_family == AF_INET6)
1498 cxgb4_clip_release(ndev,
1499 (const u32 *)&csk->saddr6.sin6_addr, 1);
1500 #endif
1501 rel_resource_without_clip:
1502 if (n)
1503 neigh_release(n);
1504 if (skb)
1505 __kfree_skb(skb);
1506 return -EINVAL;
1507 }
1508
1509 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1510 [CPL_ACT_ESTABLISH] = do_act_establish,
1511 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1512 [CPL_PEER_CLOSE] = do_peer_close,
1513 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1514 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1515 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1516 [CPL_FW4_ACK] = do_fw4_ack,
1517 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1518 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1519 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1520 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1521 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1522 [CPL_RX_DATA] = do_rx_data,
1523 };
1524
1525 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1526 {
1527 int rc;
1528
1529 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1530 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1531
1532 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1533 cxgb4i_max_connect);
1534 if (rc < 0)
1535 return rc;
1536
1537 cdev->csk_release_offload_resources = release_offload_resources;
1538 cdev->csk_push_tx_frames = push_tx_frames;
1539 cdev->csk_send_abort_req = send_abort_req;
1540 cdev->csk_send_close_req = send_close_req;
1541 cdev->csk_send_rx_credits = send_rx_credits;
1542 cdev->csk_alloc_cpls = alloc_cpls;
1543 cdev->csk_init_act_open = init_act_open;
1544
1545 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1546 return 0;
1547 }
1548
1549 static inline void
1550 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1551 struct ulp_mem_io *req,
1552 unsigned int wr_len, unsigned int dlen,
1553 unsigned int pm_addr,
1554 int tid)
1555 {
1556 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1557 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1558
1559 INIT_ULPTX_WR(req, wr_len, 0, tid);
1560 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1561 FW_WR_ATOMIC_V(0));
1562 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1563 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1564 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1565 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1566 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1567 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1568
1569 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1570 idata->len = htonl(dlen);
1571 }
1572
1573 static struct sk_buff *
1574 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1575 struct cxgbi_ppm *ppm,
1576 unsigned int idx, unsigned int npods,
1577 unsigned int tid)
1578 {
1579 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1580 unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1581 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1582 sizeof(struct ulptx_idata) + dlen, 16);
1583 struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1584
1585 if (!skb) {
1586 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1587 __func__, ppm->ndev->name, idx, npods);
1588 return NULL;
1589 }
1590
1591 ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1592 pm_addr, tid);
1593
1594 return skb;
1595 }
1596
1597 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1598 struct cxgbi_task_tag_info *ttinfo,
1599 unsigned int idx, unsigned int npods,
1600 struct scatterlist **sg_pp,
1601 unsigned int *sg_off)
1602 {
1603 struct cxgbi_device *cdev = csk->cdev;
1604 struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1605 csk->tid);
1606 struct ulp_mem_io *req;
1607 struct ulptx_idata *idata;
1608 struct cxgbi_pagepod *ppod;
1609 int i;
1610
1611 if (!skb)
1612 return -ENOMEM;
1613
1614 req = (struct ulp_mem_io *)skb->head;
1615 idata = (struct ulptx_idata *)(req + 1);
1616 ppod = (struct cxgbi_pagepod *)(idata + 1);
1617
1618 for (i = 0; i < npods; i++, ppod++)
1619 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1620
1621 cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1622 cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1623 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1624
1625 spin_lock_bh(&csk->lock);
1626 cxgbi_sock_skb_entail(csk, skb);
1627 spin_unlock_bh(&csk->lock);
1628
1629 return 0;
1630 }
1631
1632 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1633 struct cxgbi_task_tag_info *ttinfo)
1634 {
1635 unsigned int pidx = ttinfo->idx;
1636 unsigned int npods = ttinfo->npods;
1637 unsigned int i, cnt;
1638 int err = 0;
1639 struct scatterlist *sg = ttinfo->sgl;
1640 unsigned int offset = 0;
1641
1642 ttinfo->cid = csk->port_id;
1643
1644 for (i = 0; i < npods; i += cnt, pidx += cnt) {
1645 cnt = npods - i;
1646
1647 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1648 cnt = ULPMEM_IDATA_MAX_NPPODS;
1649 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1650 &sg, &offset);
1651 if (err < 0)
1652 break;
1653 }
1654
1655 return err;
1656 }
1657
1658 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1659 int pg_idx, bool reply)
1660 {
1661 struct sk_buff *skb;
1662 struct cpl_set_tcb_field *req;
1663
1664 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1665 return 0;
1666
1667 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1668 if (!skb)
1669 return -ENOMEM;
1670
1671 /* set up ulp page size */
1672 req = (struct cpl_set_tcb_field *)skb->head;
1673 INIT_TP_WR(req, csk->tid);
1674 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1675 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1676 req->word_cookie = htons(0);
1677 req->mask = cpu_to_be64(0x3 << 8);
1678 req->val = cpu_to_be64(pg_idx << 8);
1679 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1680
1681 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1682 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1683
1684 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1685 return 0;
1686 }
1687
1688 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1689 int hcrc, int dcrc, int reply)
1690 {
1691 struct sk_buff *skb;
1692 struct cpl_set_tcb_field *req;
1693
1694 if (!hcrc && !dcrc)
1695 return 0;
1696
1697 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1698 if (!skb)
1699 return -ENOMEM;
1700
1701 csk->hcrc_len = (hcrc ? 4 : 0);
1702 csk->dcrc_len = (dcrc ? 4 : 0);
1703 /* set up ulp submode */
1704 req = (struct cpl_set_tcb_field *)skb->head;
1705 INIT_TP_WR(req, tid);
1706 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1707 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1708 req->word_cookie = htons(0);
1709 req->mask = cpu_to_be64(0x3 << 4);
1710 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1711 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1712 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1713
1714 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1715 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1716
1717 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1718 return 0;
1719 }
1720
1721 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
1722 {
1723 return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
1724 (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
1725 }
1726
1727 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1728 {
1729 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1730 struct net_device *ndev = cdev->ports[0];
1731 struct cxgbi_tag_format tformat;
1732 unsigned int ppmax;
1733 int i;
1734
1735 if (!lldi->vr->iscsi.size) {
1736 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
1737 return -EACCES;
1738 }
1739
1740 cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
1741 ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
1742
1743 memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
1744 for (i = 0; i < 4; i++)
1745 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
1746 & 0xF;
1747 cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
1748
1749 cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
1750 lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
1751
1752 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1753 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1754 cdev->csk_ddp_set_map = ddp_set_map;
1755 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1756 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1757 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1758 lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1759 cdev->cdev2ppm = cdev2ppm;
1760
1761 return 0;
1762 }
1763
1764 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1765 {
1766 struct cxgbi_device *cdev;
1767 struct port_info *pi;
1768 int i, rc;
1769
1770 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1771 if (!cdev) {
1772 pr_info("t4 device 0x%p, register failed.\n", lldi);
1773 return NULL;
1774 }
1775 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1776 cdev, lldi->adapter_type, lldi->nports,
1777 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1778 lldi->nrxq, lldi->wr_cred);
1779 for (i = 0; i < lldi->nrxq; i++)
1780 log_debug(1 << CXGBI_DBG_DEV,
1781 "t4 0x%p, rxq id #%d: %u.\n",
1782 cdev, i, lldi->rxq_ids[i]);
1783
1784 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1785 cdev->flags = CXGBI_FLAG_DEV_T4;
1786 cdev->pdev = lldi->pdev;
1787 cdev->ports = lldi->ports;
1788 cdev->nports = lldi->nports;
1789 cdev->mtus = lldi->mtus;
1790 cdev->nmtus = NMTUS;
1791 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1792 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1793 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1794 cdev->itp = &cxgb4i_iscsi_transport;
1795
1796 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
1797 << FW_VIID_PFN_S;
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 break;
1882 case CXGB4_STATE_START_RECOVERY:
1883 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1884 /* close all connections */
1885 break;
1886 case CXGB4_STATE_DOWN:
1887 pr_info("cdev 0x%p, DOWN.\n", cdev);
1888 break;
1889 case CXGB4_STATE_DETACH:
1890 pr_info("cdev 0x%p, DETACH.\n", cdev);
1891 cxgbi_device_unregister(cdev);
1892 break;
1893 default:
1894 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1895 break;
1896 }
1897 return 0;
1898 }
1899
1900 static int __init cxgb4i_init_module(void)
1901 {
1902 int rc;
1903
1904 printk(KERN_INFO "%s", version);
1905
1906 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1907 if (rc < 0)
1908 return rc;
1909 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1910
1911 return 0;
1912 }
1913
1914 static void __exit cxgb4i_exit_module(void)
1915 {
1916 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1917 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1918 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1919 }
1920
1921 module_init(cxgb4i_init_module);
1922 module_exit(cxgb4i_exit_module);
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