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cxgb4i: don't redefine DIV_ROUND_UP
[deliverable/linux.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 .add = t4_uld_add,
88 .rx_handler = t4_uld_rx_handler,
89 .state_change = t4_uld_state_change,
90 };
91
92 static struct scsi_host_template cxgb4i_host_template = {
93 .module = THIS_MODULE,
94 .name = DRV_MODULE_NAME,
95 .proc_name = DRV_MODULE_NAME,
96 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
97 .queuecommand = iscsi_queuecommand,
98 .change_queue_depth = scsi_change_queue_depth,
99 .sg_tablesize = SG_ALL,
100 .max_sectors = 0xFFFF,
101 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
102 .eh_abort_handler = iscsi_eh_abort,
103 .eh_device_reset_handler = iscsi_eh_device_reset,
104 .eh_target_reset_handler = iscsi_eh_recover_target,
105 .target_alloc = iscsi_target_alloc,
106 .use_clustering = DISABLE_CLUSTERING,
107 .this_id = -1,
108 .track_queue_depth = 1,
109 };
110
111 static struct iscsi_transport cxgb4i_iscsi_transport = {
112 .owner = THIS_MODULE,
113 .name = DRV_MODULE_NAME,
114 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
115 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
116 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
117 .attr_is_visible = cxgbi_attr_is_visible,
118 .get_host_param = cxgbi_get_host_param,
119 .set_host_param = cxgbi_set_host_param,
120 /* session management */
121 .create_session = cxgbi_create_session,
122 .destroy_session = cxgbi_destroy_session,
123 .get_session_param = iscsi_session_get_param,
124 /* connection management */
125 .create_conn = cxgbi_create_conn,
126 .bind_conn = cxgbi_bind_conn,
127 .destroy_conn = iscsi_tcp_conn_teardown,
128 .start_conn = iscsi_conn_start,
129 .stop_conn = iscsi_conn_stop,
130 .get_conn_param = iscsi_conn_get_param,
131 .set_param = cxgbi_set_conn_param,
132 .get_stats = cxgbi_get_conn_stats,
133 /* pdu xmit req from user space */
134 .send_pdu = iscsi_conn_send_pdu,
135 /* task */
136 .init_task = iscsi_tcp_task_init,
137 .xmit_task = iscsi_tcp_task_xmit,
138 .cleanup_task = cxgbi_cleanup_task,
139 /* pdu */
140 .alloc_pdu = cxgbi_conn_alloc_pdu,
141 .init_pdu = cxgbi_conn_init_pdu,
142 .xmit_pdu = cxgbi_conn_xmit_pdu,
143 .parse_pdu_itt = cxgbi_parse_pdu_itt,
144 /* TCP connect/disconnect */
145 .get_ep_param = cxgbi_get_ep_param,
146 .ep_connect = cxgbi_ep_connect,
147 .ep_poll = cxgbi_ep_poll,
148 .ep_disconnect = cxgbi_ep_disconnect,
149 /* Error recovery timeout call */
150 .session_recovery_timedout = iscsi_session_recovery_timedout,
151 };
152
153 static struct scsi_transport_template *cxgb4i_stt;
154
155 /*
156 * CPL (Chelsio Protocol Language) defines a message passing interface between
157 * the host driver and Chelsio asic.
158 * The section below implments CPLs that related to iscsi tcp connection
159 * open/close/abort and data send/receive.
160 */
161
162 #define RCV_BUFSIZ_MASK 0x3FFU
163 #define MAX_IMM_TX_PKT_LEN 256
164
165 static int push_tx_frames(struct cxgbi_sock *, int);
166
167 /*
168 * is_ofld_imm - check whether a packet can be sent as immediate data
169 * @skb: the packet
170 *
171 * Returns true if a packet can be sent as an offload WR with immediate
172 * data. We currently use the same limit as for Ethernet packets.
173 */
174 static inline bool is_ofld_imm(const struct sk_buff *skb)
175 {
176 int len = skb->len;
177
178 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
179 len += sizeof(struct fw_ofld_tx_data_wr);
180
181 return len <= MAX_IMM_TX_PKT_LEN;
182 }
183
184 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
185 struct l2t_entry *e)
186 {
187 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
188 int t4 = is_t4(lldi->adapter_type);
189 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
190 unsigned long long opt0;
191 unsigned int opt2;
192 unsigned int qid_atid = ((unsigned int)csk->atid) |
193 (((unsigned int)csk->rss_qid) << 14);
194
195 opt0 = KEEP_ALIVE_F |
196 WND_SCALE_V(wscale) |
197 MSS_IDX_V(csk->mss_idx) |
198 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
199 TX_CHAN_V(csk->tx_chan) |
200 SMAC_SEL_V(csk->smac_idx) |
201 ULP_MODE_V(ULP_MODE_ISCSI) |
202 RCV_BUFSIZ_V(csk->rcv_win >> 10);
203
204 opt2 = RX_CHANNEL_V(0) |
205 RSS_QUEUE_VALID_F |
206 RSS_QUEUE_V(csk->rss_qid);
207
208 if (is_t4(lldi->adapter_type)) {
209 struct cpl_act_open_req *req =
210 (struct cpl_act_open_req *)skb->head;
211
212 INIT_TP_WR(req, 0);
213 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
214 qid_atid));
215 req->local_port = csk->saddr.sin_port;
216 req->peer_port = csk->daddr.sin_port;
217 req->local_ip = csk->saddr.sin_addr.s_addr;
218 req->peer_ip = csk->daddr.sin_addr.s_addr;
219 req->opt0 = cpu_to_be64(opt0);
220 req->params = cpu_to_be32(cxgb4_select_ntuple(
221 csk->cdev->ports[csk->port_id],
222 csk->l2t));
223 opt2 |= RX_FC_VALID_F;
224 req->opt2 = cpu_to_be32(opt2);
225
226 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
227 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
228 csk, &req->local_ip, ntohs(req->local_port),
229 &req->peer_ip, ntohs(req->peer_port),
230 csk->atid, csk->rss_qid);
231 } else {
232 struct cpl_t5_act_open_req *req =
233 (struct cpl_t5_act_open_req *)skb->head;
234 u32 isn = (prandom_u32() & ~7UL) - 1;
235
236 INIT_TP_WR(req, 0);
237 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
238 qid_atid));
239 req->local_port = csk->saddr.sin_port;
240 req->peer_port = csk->daddr.sin_port;
241 req->local_ip = csk->saddr.sin_addr.s_addr;
242 req->peer_ip = csk->daddr.sin_addr.s_addr;
243 req->opt0 = cpu_to_be64(opt0);
244 req->params = cpu_to_be64(FILTER_TUPLE_V(
245 cxgb4_select_ntuple(
246 csk->cdev->ports[csk->port_id],
247 csk->l2t)));
248 req->rsvd = cpu_to_be32(isn);
249 opt2 |= T5_ISS_VALID;
250 opt2 |= T5_OPT_2_VALID_F;
251
252 req->opt2 = cpu_to_be32(opt2);
253
254 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
255 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
256 csk, &req->local_ip, ntohs(req->local_port),
257 &req->peer_ip, ntohs(req->peer_port),
258 csk->atid, csk->rss_qid);
259 }
260
261 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
262
263 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
264 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
265 csk->state, csk->flags, csk->atid, csk->rss_qid);
266
267 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
268 }
269
270 #if IS_ENABLED(CONFIG_IPV6)
271 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
272 struct l2t_entry *e)
273 {
274 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
275 int t4 = is_t4(lldi->adapter_type);
276 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
277 unsigned long long opt0;
278 unsigned int opt2;
279 unsigned int qid_atid = ((unsigned int)csk->atid) |
280 (((unsigned int)csk->rss_qid) << 14);
281
282 opt0 = KEEP_ALIVE_F |
283 WND_SCALE_V(wscale) |
284 MSS_IDX_V(csk->mss_idx) |
285 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
286 TX_CHAN_V(csk->tx_chan) |
287 SMAC_SEL_V(csk->smac_idx) |
288 ULP_MODE_V(ULP_MODE_ISCSI) |
289 RCV_BUFSIZ_V(csk->rcv_win >> 10);
290
291 opt2 = RX_CHANNEL_V(0) |
292 RSS_QUEUE_VALID_F |
293 RX_FC_DISABLE_F |
294 RSS_QUEUE_V(csk->rss_qid);
295
296 if (t4) {
297 struct cpl_act_open_req6 *req =
298 (struct cpl_act_open_req6 *)skb->head;
299
300 INIT_TP_WR(req, 0);
301 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
302 qid_atid));
303 req->local_port = csk->saddr6.sin6_port;
304 req->peer_port = csk->daddr6.sin6_port;
305
306 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
307 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
308 8);
309 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
310 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
311 8);
312
313 req->opt0 = cpu_to_be64(opt0);
314
315 opt2 |= RX_FC_VALID_F;
316 req->opt2 = cpu_to_be32(opt2);
317
318 req->params = cpu_to_be32(cxgb4_select_ntuple(
319 csk->cdev->ports[csk->port_id],
320 csk->l2t));
321 } else {
322 struct cpl_t5_act_open_req6 *req =
323 (struct cpl_t5_act_open_req6 *)skb->head;
324
325 INIT_TP_WR(req, 0);
326 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
327 qid_atid));
328 req->local_port = csk->saddr6.sin6_port;
329 req->peer_port = csk->daddr6.sin6_port;
330 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
331 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
332 8);
333 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
334 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
335 8);
336 req->opt0 = cpu_to_be64(opt0);
337
338 opt2 |= T5_OPT_2_VALID_F;
339 req->opt2 = cpu_to_be32(opt2);
340
341 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
342 csk->cdev->ports[csk->port_id],
343 csk->l2t)));
344 }
345
346 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
347
348 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
349 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
350 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
351 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
352 csk->rss_qid);
353
354 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
355 }
356 #endif
357
358 static void send_close_req(struct cxgbi_sock *csk)
359 {
360 struct sk_buff *skb = csk->cpl_close;
361 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
362 unsigned int tid = csk->tid;
363
364 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
365 "csk 0x%p,%u,0x%lx, tid %u.\n",
366 csk, csk->state, csk->flags, csk->tid);
367 csk->cpl_close = NULL;
368 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
369 INIT_TP_WR(req, tid);
370 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
371 req->rsvd = 0;
372
373 cxgbi_sock_skb_entail(csk, skb);
374 if (csk->state >= CTP_ESTABLISHED)
375 push_tx_frames(csk, 1);
376 }
377
378 static void abort_arp_failure(void *handle, struct sk_buff *skb)
379 {
380 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
381 struct cpl_abort_req *req;
382
383 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
384 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
385 csk, csk->state, csk->flags, csk->tid);
386 req = (struct cpl_abort_req *)skb->data;
387 req->cmd = CPL_ABORT_NO_RST;
388 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
389 }
390
391 static void send_abort_req(struct cxgbi_sock *csk)
392 {
393 struct cpl_abort_req *req;
394 struct sk_buff *skb = csk->cpl_abort_req;
395
396 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
397 return;
398
399 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
400 send_tx_flowc_wr(csk);
401 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
402 }
403
404 cxgbi_sock_set_state(csk, CTP_ABORTING);
405 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
406 cxgbi_sock_purge_write_queue(csk);
407
408 csk->cpl_abort_req = NULL;
409 req = (struct cpl_abort_req *)skb->head;
410 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
411 req->cmd = CPL_ABORT_SEND_RST;
412 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
413 INIT_TP_WR(req, csk->tid);
414 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
415 req->rsvd0 = htonl(csk->snd_nxt);
416 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
417
418 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
419 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
420 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
421 req->rsvd1);
422
423 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
424 }
425
426 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
427 {
428 struct sk_buff *skb = csk->cpl_abort_rpl;
429 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
430
431 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
432 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
433 csk, csk->state, csk->flags, csk->tid, rst_status);
434
435 csk->cpl_abort_rpl = NULL;
436 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
437 INIT_TP_WR(rpl, csk->tid);
438 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
439 rpl->cmd = rst_status;
440 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
441 }
442
443 /*
444 * CPL connection rx data ack: host ->
445 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
446 * credits sent.
447 */
448 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
449 {
450 struct sk_buff *skb;
451 struct cpl_rx_data_ack *req;
452
453 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
454 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
455 csk, csk->state, csk->flags, csk->tid, credits);
456
457 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
458 if (!skb) {
459 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
460 return 0;
461 }
462 req = (struct cpl_rx_data_ack *)skb->head;
463
464 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
465 INIT_TP_WR(req, csk->tid);
466 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
467 csk->tid));
468 req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
469 | RX_FORCE_ACK_F);
470 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
471 return credits;
472 }
473
474 /*
475 * sgl_len - calculates the size of an SGL of the given capacity
476 * @n: the number of SGL entries
477 * Calculates the number of flits needed for a scatter/gather list that
478 * can hold the given number of entries.
479 */
480 static inline unsigned int sgl_len(unsigned int n)
481 {
482 n--;
483 return (3 * n) / 2 + (n & 1) + 2;
484 }
485
486 /*
487 * calc_tx_flits_ofld - calculate # of flits for an offload packet
488 * @skb: the packet
489 *
490 * Returns the number of flits needed for the given offload packet.
491 * These packets are already fully constructed and no additional headers
492 * will be added.
493 */
494 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
495 {
496 unsigned int flits, cnt;
497
498 if (is_ofld_imm(skb))
499 return DIV_ROUND_UP(skb->len, 8);
500 flits = skb_transport_offset(skb) / 8;
501 cnt = skb_shinfo(skb)->nr_frags;
502 if (skb_tail_pointer(skb) != skb_transport_header(skb))
503 cnt++;
504 return flits + sgl_len(cnt);
505 }
506
507 #define FLOWC_WR_NPARAMS_MIN 9
508 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
509 {
510 int nparams, flowclen16, flowclen;
511
512 nparams = FLOWC_WR_NPARAMS_MIN;
513 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
514 flowclen16 = DIV_ROUND_UP(flowclen, 16);
515 flowclen = flowclen16 * 16;
516 /*
517 * Return the number of 16-byte credits used by the FlowC request.
518 * Pass back the nparams and actual FlowC length if requested.
519 */
520 if (nparamsp)
521 *nparamsp = nparams;
522 if (flowclenp)
523 *flowclenp = flowclen;
524
525 return flowclen16;
526 }
527
528 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
529 {
530 struct sk_buff *skb;
531 struct fw_flowc_wr *flowc;
532 int nparams, flowclen16, flowclen;
533
534 flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
535 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
536 flowc = (struct fw_flowc_wr *)skb->head;
537 flowc->op_to_nparams =
538 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
539 flowc->flowid_len16 =
540 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
541 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
542 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
543 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
544 flowc->mnemval[1].val = htonl(csk->tx_chan);
545 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
546 flowc->mnemval[2].val = htonl(csk->tx_chan);
547 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
548 flowc->mnemval[3].val = htonl(csk->rss_qid);
549 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
550 flowc->mnemval[4].val = htonl(csk->snd_nxt);
551 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
552 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
553 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
554 flowc->mnemval[6].val = htonl(csk->snd_win);
555 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
556 flowc->mnemval[7].val = htonl(csk->advmss);
557 flowc->mnemval[8].mnemonic = 0;
558 flowc->mnemval[8].val = 0;
559 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
560 flowc->mnemval[8].val = 16384;
561
562 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
563
564 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
565 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
566 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
567 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
568 csk->advmss);
569
570 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
571
572 return flowclen16;
573 }
574
575 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
576 int dlen, int len, u32 credits, int compl)
577 {
578 struct fw_ofld_tx_data_wr *req;
579 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
580 unsigned int wr_ulp_mode = 0, val;
581 bool imm = is_ofld_imm(skb);
582
583 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
584
585 if (imm) {
586 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
587 FW_WR_COMPL_F |
588 FW_WR_IMMDLEN_V(dlen));
589 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
590 FW_WR_LEN16_V(credits));
591 } else {
592 req->op_to_immdlen =
593 cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
594 FW_WR_COMPL_F |
595 FW_WR_IMMDLEN_V(0));
596 req->flowid_len16 =
597 cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
598 FW_WR_LEN16_V(credits));
599 }
600 if (submode)
601 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
602 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
603 val = skb_peek(&csk->write_queue) ? 0 : 1;
604 req->tunnel_to_proxy = htonl(wr_ulp_mode |
605 FW_OFLD_TX_DATA_WR_SHOVE_V(val));
606 req->plen = htonl(len);
607 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
608 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
609 }
610
611 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
612 {
613 kfree_skb(skb);
614 }
615
616 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
617 {
618 int total_size = 0;
619 struct sk_buff *skb;
620
621 if (unlikely(csk->state < CTP_ESTABLISHED ||
622 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
623 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
624 1 << CXGBI_DBG_PDU_TX,
625 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
626 csk, csk->state, csk->flags, csk->tid);
627 return 0;
628 }
629
630 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
631 int dlen = skb->len;
632 int len = skb->len;
633 unsigned int credits_needed;
634 int flowclen16 = 0;
635
636 skb_reset_transport_header(skb);
637 if (is_ofld_imm(skb))
638 credits_needed = DIV_ROUND_UP(dlen, 16);
639 else
640 credits_needed = DIV_ROUND_UP(
641 8 * calc_tx_flits_ofld(skb),
642 16);
643
644 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
645 credits_needed += DIV_ROUND_UP(
646 sizeof(struct fw_ofld_tx_data_wr),
647 16);
648
649 /*
650 * Assumes the initial credits is large enough to support
651 * fw_flowc_wr plus largest possible first payload
652 */
653 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
654 flowclen16 = send_tx_flowc_wr(csk);
655 csk->wr_cred -= flowclen16;
656 csk->wr_una_cred += flowclen16;
657 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
658 }
659
660 if (csk->wr_cred < credits_needed) {
661 log_debug(1 << CXGBI_DBG_PDU_TX,
662 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
663 csk, skb->len, skb->data_len,
664 credits_needed, csk->wr_cred);
665 break;
666 }
667 __skb_unlink(skb, &csk->write_queue);
668 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
669 skb->csum = credits_needed + flowclen16;
670 csk->wr_cred -= credits_needed;
671 csk->wr_una_cred += credits_needed;
672 cxgbi_sock_enqueue_wr(csk, skb);
673
674 log_debug(1 << CXGBI_DBG_PDU_TX,
675 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
676 csk, skb->len, skb->data_len, credits_needed,
677 csk->wr_cred, csk->wr_una_cred);
678
679 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
680 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
681 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
682 req_completion);
683 csk->snd_nxt += len;
684 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
685 }
686 total_size += skb->truesize;
687 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
688
689 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
690 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
691 csk, csk->state, csk->flags, csk->tid, skb, len);
692
693 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
694 }
695 return total_size;
696 }
697
698 static inline void free_atid(struct cxgbi_sock *csk)
699 {
700 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
701
702 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
703 cxgb4_free_atid(lldi->tids, csk->atid);
704 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
705 cxgbi_sock_put(csk);
706 }
707 }
708
709 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
710 {
711 struct cxgbi_sock *csk;
712 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
713 unsigned short tcp_opt = ntohs(req->tcp_opt);
714 unsigned int tid = GET_TID(req);
715 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
716 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
717 struct tid_info *t = lldi->tids;
718 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
719
720 csk = lookup_atid(t, atid);
721 if (unlikely(!csk)) {
722 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
723 goto rel_skb;
724 }
725
726 if (csk->atid != atid) {
727 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
728 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
729 goto rel_skb;
730 }
731
732 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
733 (&csk->saddr), (&csk->daddr),
734 atid, tid, csk, csk->state, csk->flags, rcv_isn);
735
736 module_put(THIS_MODULE);
737
738 cxgbi_sock_get(csk);
739 csk->tid = tid;
740 cxgb4_insert_tid(lldi->tids, csk, tid);
741 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
742
743 free_atid(csk);
744
745 spin_lock_bh(&csk->lock);
746 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
747 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
748 csk, csk->state, csk->flags, csk->tid);
749
750 if (csk->retry_timer.function) {
751 del_timer(&csk->retry_timer);
752 csk->retry_timer.function = NULL;
753 }
754
755 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
756 /*
757 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
758 * pass through opt0.
759 */
760 if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
761 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
762
763 csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
764 if (TCPOPT_TSTAMP_G(tcp_opt))
765 csk->advmss -= 12;
766 if (csk->advmss < 128)
767 csk->advmss = 128;
768
769 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
770 "csk 0x%p, mss_idx %u, advmss %u.\n",
771 csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
772
773 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
774
775 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
776 send_abort_req(csk);
777 else {
778 if (skb_queue_len(&csk->write_queue))
779 push_tx_frames(csk, 0);
780 cxgbi_conn_tx_open(csk);
781 }
782 spin_unlock_bh(&csk->lock);
783
784 rel_skb:
785 __kfree_skb(skb);
786 }
787
788 static int act_open_rpl_status_to_errno(int status)
789 {
790 switch (status) {
791 case CPL_ERR_CONN_RESET:
792 return -ECONNREFUSED;
793 case CPL_ERR_ARP_MISS:
794 return -EHOSTUNREACH;
795 case CPL_ERR_CONN_TIMEDOUT:
796 return -ETIMEDOUT;
797 case CPL_ERR_TCAM_FULL:
798 return -ENOMEM;
799 case CPL_ERR_CONN_EXIST:
800 return -EADDRINUSE;
801 default:
802 return -EIO;
803 }
804 }
805
806 static void csk_act_open_retry_timer(unsigned long data)
807 {
808 struct sk_buff *skb = NULL;
809 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
810 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
811 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
812 struct l2t_entry *);
813 int t4 = is_t4(lldi->adapter_type), size, size6;
814
815 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
816 "csk 0x%p,%u,0x%lx,%u.\n",
817 csk, csk->state, csk->flags, csk->tid);
818
819 cxgbi_sock_get(csk);
820 spin_lock_bh(&csk->lock);
821
822 if (t4) {
823 size = sizeof(struct cpl_act_open_req);
824 size6 = sizeof(struct cpl_act_open_req6);
825 } else {
826 size = sizeof(struct cpl_t5_act_open_req);
827 size6 = sizeof(struct cpl_t5_act_open_req6);
828 }
829
830 if (csk->csk_family == AF_INET) {
831 send_act_open_func = send_act_open_req;
832 skb = alloc_wr(size, 0, GFP_ATOMIC);
833 #if IS_ENABLED(CONFIG_IPV6)
834 } else {
835 send_act_open_func = send_act_open_req6;
836 skb = alloc_wr(size6, 0, GFP_ATOMIC);
837 #endif
838 }
839
840 if (!skb)
841 cxgbi_sock_fail_act_open(csk, -ENOMEM);
842 else {
843 skb->sk = (struct sock *)csk;
844 t4_set_arp_err_handler(skb, csk,
845 cxgbi_sock_act_open_req_arp_failure);
846 send_act_open_func(csk, skb, csk->l2t);
847 }
848
849 spin_unlock_bh(&csk->lock);
850 cxgbi_sock_put(csk);
851
852 }
853
854 static inline bool is_neg_adv(unsigned int status)
855 {
856 return status == CPL_ERR_RTX_NEG_ADVICE ||
857 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
858 status == CPL_ERR_PERSIST_NEG_ADVICE;
859 }
860
861 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
862 {
863 struct cxgbi_sock *csk;
864 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
865 unsigned int tid = GET_TID(rpl);
866 unsigned int atid =
867 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
868 unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
869 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
870 struct tid_info *t = lldi->tids;
871
872 csk = lookup_atid(t, atid);
873 if (unlikely(!csk)) {
874 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
875 goto rel_skb;
876 }
877
878 pr_info_ipaddr("tid %u/%u, status %u.\n"
879 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
880 atid, tid, status, csk, csk->state, csk->flags);
881
882 if (is_neg_adv(status))
883 goto rel_skb;
884
885 module_put(THIS_MODULE);
886
887 if (status && status != CPL_ERR_TCAM_FULL &&
888 status != CPL_ERR_CONN_EXIST &&
889 status != CPL_ERR_ARP_MISS)
890 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
891
892 cxgbi_sock_get(csk);
893 spin_lock_bh(&csk->lock);
894
895 if (status == CPL_ERR_CONN_EXIST &&
896 csk->retry_timer.function != csk_act_open_retry_timer) {
897 csk->retry_timer.function = csk_act_open_retry_timer;
898 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
899 } else
900 cxgbi_sock_fail_act_open(csk,
901 act_open_rpl_status_to_errno(status));
902
903 spin_unlock_bh(&csk->lock);
904 cxgbi_sock_put(csk);
905 rel_skb:
906 __kfree_skb(skb);
907 }
908
909 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
910 {
911 struct cxgbi_sock *csk;
912 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
913 unsigned int tid = GET_TID(req);
914 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
915 struct tid_info *t = lldi->tids;
916
917 csk = lookup_tid(t, tid);
918 if (unlikely(!csk)) {
919 pr_err("can't find connection for tid %u.\n", tid);
920 goto rel_skb;
921 }
922 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
923 (&csk->saddr), (&csk->daddr),
924 csk, csk->state, csk->flags, csk->tid);
925 cxgbi_sock_rcv_peer_close(csk);
926 rel_skb:
927 __kfree_skb(skb);
928 }
929
930 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
931 {
932 struct cxgbi_sock *csk;
933 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
934 unsigned int tid = GET_TID(rpl);
935 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
936 struct tid_info *t = lldi->tids;
937
938 csk = lookup_tid(t, tid);
939 if (unlikely(!csk)) {
940 pr_err("can't find connection for tid %u.\n", tid);
941 goto rel_skb;
942 }
943 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
944 (&csk->saddr), (&csk->daddr),
945 csk, csk->state, csk->flags, csk->tid);
946 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
947 rel_skb:
948 __kfree_skb(skb);
949 }
950
951 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
952 int *need_rst)
953 {
954 switch (abort_reason) {
955 case CPL_ERR_BAD_SYN: /* fall through */
956 case CPL_ERR_CONN_RESET:
957 return csk->state > CTP_ESTABLISHED ?
958 -EPIPE : -ECONNRESET;
959 case CPL_ERR_XMIT_TIMEDOUT:
960 case CPL_ERR_PERSIST_TIMEDOUT:
961 case CPL_ERR_FINWAIT2_TIMEDOUT:
962 case CPL_ERR_KEEPALIVE_TIMEDOUT:
963 return -ETIMEDOUT;
964 default:
965 return -EIO;
966 }
967 }
968
969 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
970 {
971 struct cxgbi_sock *csk;
972 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
973 unsigned int tid = GET_TID(req);
974 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
975 struct tid_info *t = lldi->tids;
976 int rst_status = CPL_ABORT_NO_RST;
977
978 csk = lookup_tid(t, tid);
979 if (unlikely(!csk)) {
980 pr_err("can't find connection for tid %u.\n", tid);
981 goto rel_skb;
982 }
983
984 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
985 (&csk->saddr), (&csk->daddr),
986 csk, csk->state, csk->flags, csk->tid, req->status);
987
988 if (is_neg_adv(req->status))
989 goto rel_skb;
990
991 cxgbi_sock_get(csk);
992 spin_lock_bh(&csk->lock);
993
994 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
995
996 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
997 send_tx_flowc_wr(csk);
998 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
999 }
1000
1001 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1002 cxgbi_sock_set_state(csk, CTP_ABORTING);
1003
1004 send_abort_rpl(csk, rst_status);
1005
1006 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1007 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1008 cxgbi_sock_closed(csk);
1009 }
1010
1011 spin_unlock_bh(&csk->lock);
1012 cxgbi_sock_put(csk);
1013 rel_skb:
1014 __kfree_skb(skb);
1015 }
1016
1017 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1018 {
1019 struct cxgbi_sock *csk;
1020 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1021 unsigned int tid = GET_TID(rpl);
1022 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1023 struct tid_info *t = lldi->tids;
1024
1025 csk = lookup_tid(t, tid);
1026 if (!csk)
1027 goto rel_skb;
1028
1029 if (csk)
1030 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1031 (&csk->saddr), (&csk->daddr), csk,
1032 csk->state, csk->flags, csk->tid, rpl->status);
1033
1034 if (rpl->status == CPL_ERR_ABORT_FAILED)
1035 goto rel_skb;
1036
1037 cxgbi_sock_rcv_abort_rpl(csk);
1038 rel_skb:
1039 __kfree_skb(skb);
1040 }
1041
1042 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1043 {
1044 struct cxgbi_sock *csk;
1045 struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1046 unsigned int tid = GET_TID(cpl);
1047 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1048 struct tid_info *t = lldi->tids;
1049
1050 csk = lookup_tid(t, tid);
1051 if (!csk) {
1052 pr_err("can't find connection for tid %u.\n", tid);
1053 } else {
1054 /* not expecting this, reset the connection. */
1055 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1056 spin_lock_bh(&csk->lock);
1057 send_abort_req(csk);
1058 spin_unlock_bh(&csk->lock);
1059 }
1060 __kfree_skb(skb);
1061 }
1062
1063 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1064 {
1065 struct cxgbi_sock *csk;
1066 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1067 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1068 unsigned int tid = GET_TID(cpl);
1069 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1070 struct tid_info *t = lldi->tids;
1071
1072 csk = lookup_tid(t, tid);
1073 if (unlikely(!csk)) {
1074 pr_err("can't find conn. for tid %u.\n", tid);
1075 goto rel_skb;
1076 }
1077
1078 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1079 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1080 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1081 pdu_len_ddp);
1082
1083 spin_lock_bh(&csk->lock);
1084
1085 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1086 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1087 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1088 csk, csk->state, csk->flags, csk->tid);
1089 if (csk->state != CTP_ABORTING)
1090 goto abort_conn;
1091 else
1092 goto discard;
1093 }
1094
1095 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1096 cxgbi_skcb_flags(skb) = 0;
1097
1098 skb_reset_transport_header(skb);
1099 __skb_pull(skb, sizeof(*cpl));
1100 __pskb_trim(skb, ntohs(cpl->len));
1101
1102 if (!csk->skb_ulp_lhdr) {
1103 unsigned char *bhs;
1104 unsigned int hlen, dlen, plen;
1105
1106 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1107 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1108 csk, csk->state, csk->flags, csk->tid, skb);
1109 csk->skb_ulp_lhdr = skb;
1110 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1111
1112 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1113 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1114 csk->tid, cxgbi_skcb_tcp_seq(skb),
1115 csk->rcv_nxt);
1116 goto abort_conn;
1117 }
1118
1119 bhs = skb->data;
1120 hlen = ntohs(cpl->len);
1121 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1122
1123 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1124 if (is_t4(lldi->adapter_type))
1125 plen -= 40;
1126
1127 if ((hlen + dlen) != plen) {
1128 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1129 "mismatch %u != %u + %u, seq 0x%x.\n",
1130 csk->tid, plen, hlen, dlen,
1131 cxgbi_skcb_tcp_seq(skb));
1132 goto abort_conn;
1133 }
1134
1135 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1136 if (dlen)
1137 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1138 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1139
1140 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1141 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1142 csk, skb, *bhs, hlen, dlen,
1143 ntohl(*((unsigned int *)(bhs + 16))),
1144 ntohl(*((unsigned int *)(bhs + 24))));
1145
1146 } else {
1147 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1148
1149 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1150 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1151 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1152 csk, csk->state, csk->flags, skb, lskb);
1153 }
1154
1155 __skb_queue_tail(&csk->receive_queue, skb);
1156 spin_unlock_bh(&csk->lock);
1157 return;
1158
1159 abort_conn:
1160 send_abort_req(csk);
1161 discard:
1162 spin_unlock_bh(&csk->lock);
1163 rel_skb:
1164 __kfree_skb(skb);
1165 }
1166
1167 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1168 struct sk_buff *skb)
1169 {
1170 struct cxgbi_sock *csk;
1171 struct sk_buff *lskb;
1172 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1173 unsigned int tid = GET_TID(rpl);
1174 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1175 struct tid_info *t = lldi->tids;
1176 unsigned int status = ntohl(rpl->ddpvld);
1177
1178 csk = lookup_tid(t, tid);
1179 if (unlikely(!csk)) {
1180 pr_err("can't find connection for tid %u.\n", tid);
1181 goto rel_skb;
1182 }
1183
1184 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1185 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1186 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1187
1188 spin_lock_bh(&csk->lock);
1189
1190 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1191 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1192 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1193 csk, csk->state, csk->flags, csk->tid);
1194 if (csk->state != CTP_ABORTING)
1195 goto abort_conn;
1196 else
1197 goto discard;
1198 }
1199
1200 if (!csk->skb_ulp_lhdr) {
1201 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1202 goto abort_conn;
1203 }
1204
1205 lskb = csk->skb_ulp_lhdr;
1206 csk->skb_ulp_lhdr = NULL;
1207
1208 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1209
1210 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1211 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1212 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1213
1214 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1215 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1216 csk, lskb, status, cxgbi_skcb_flags(lskb));
1217 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1218 }
1219 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1220 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1221 csk, lskb, status, cxgbi_skcb_flags(lskb));
1222 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1223 }
1224 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1225 log_debug(1 << CXGBI_DBG_PDU_RX,
1226 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1227 csk, lskb, status);
1228 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1229 }
1230 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1231 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1232 log_debug(1 << CXGBI_DBG_PDU_RX,
1233 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1234 csk, lskb, status);
1235 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1236 }
1237 log_debug(1 << CXGBI_DBG_PDU_RX,
1238 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1239 csk, lskb, cxgbi_skcb_flags(lskb));
1240
1241 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1242 cxgbi_conn_pdu_ready(csk);
1243 spin_unlock_bh(&csk->lock);
1244 goto rel_skb;
1245
1246 abort_conn:
1247 send_abort_req(csk);
1248 discard:
1249 spin_unlock_bh(&csk->lock);
1250 rel_skb:
1251 __kfree_skb(skb);
1252 }
1253
1254 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1255 {
1256 struct cxgbi_sock *csk;
1257 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1258 unsigned int tid = GET_TID(rpl);
1259 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1260 struct tid_info *t = lldi->tids;
1261
1262 csk = lookup_tid(t, tid);
1263 if (unlikely(!csk))
1264 pr_err("can't find connection for tid %u.\n", tid);
1265 else {
1266 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1267 "csk 0x%p,%u,0x%lx,%u.\n",
1268 csk, csk->state, csk->flags, csk->tid);
1269 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1270 rpl->seq_vld);
1271 }
1272 __kfree_skb(skb);
1273 }
1274
1275 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1276 {
1277 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1278 unsigned int tid = GET_TID(rpl);
1279 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1280 struct tid_info *t = lldi->tids;
1281 struct cxgbi_sock *csk;
1282
1283 csk = lookup_tid(t, tid);
1284 if (!csk)
1285 pr_err("can't find conn. for tid %u.\n", tid);
1286
1287 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1288 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1289 csk, csk->state, csk->flags, csk->tid, rpl->status);
1290
1291 if (rpl->status != CPL_ERR_NONE)
1292 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1293 csk, tid, rpl->status);
1294
1295 __kfree_skb(skb);
1296 }
1297
1298 static int alloc_cpls(struct cxgbi_sock *csk)
1299 {
1300 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1301 0, GFP_KERNEL);
1302 if (!csk->cpl_close)
1303 return -ENOMEM;
1304
1305 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1306 0, GFP_KERNEL);
1307 if (!csk->cpl_abort_req)
1308 goto free_cpls;
1309
1310 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1311 0, GFP_KERNEL);
1312 if (!csk->cpl_abort_rpl)
1313 goto free_cpls;
1314 return 0;
1315
1316 free_cpls:
1317 cxgbi_sock_free_cpl_skbs(csk);
1318 return -ENOMEM;
1319 }
1320
1321 static inline void l2t_put(struct cxgbi_sock *csk)
1322 {
1323 if (csk->l2t) {
1324 cxgb4_l2t_release(csk->l2t);
1325 csk->l2t = NULL;
1326 cxgbi_sock_put(csk);
1327 }
1328 }
1329
1330 static void release_offload_resources(struct cxgbi_sock *csk)
1331 {
1332 struct cxgb4_lld_info *lldi;
1333 #if IS_ENABLED(CONFIG_IPV6)
1334 struct net_device *ndev = csk->cdev->ports[csk->port_id];
1335 #endif
1336
1337 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1338 "csk 0x%p,%u,0x%lx,%u.\n",
1339 csk, csk->state, csk->flags, csk->tid);
1340
1341 cxgbi_sock_free_cpl_skbs(csk);
1342 if (csk->wr_cred != csk->wr_max_cred) {
1343 cxgbi_sock_purge_wr_queue(csk);
1344 cxgbi_sock_reset_wr_list(csk);
1345 }
1346
1347 l2t_put(csk);
1348 #if IS_ENABLED(CONFIG_IPV6)
1349 if (csk->csk_family == AF_INET6)
1350 cxgb4_clip_release(ndev,
1351 (const u32 *)&csk->saddr6.sin6_addr, 1);
1352 #endif
1353
1354 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1355 free_atid(csk);
1356 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1357 lldi = cxgbi_cdev_priv(csk->cdev);
1358 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1359 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1360 cxgbi_sock_put(csk);
1361 }
1362 csk->dst = NULL;
1363 csk->cdev = NULL;
1364 }
1365
1366 static int init_act_open(struct cxgbi_sock *csk)
1367 {
1368 struct cxgbi_device *cdev = csk->cdev;
1369 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1370 struct net_device *ndev = cdev->ports[csk->port_id];
1371 struct sk_buff *skb = NULL;
1372 struct neighbour *n = NULL;
1373 void *daddr;
1374 unsigned int step;
1375 unsigned int size, size6;
1376 int t4 = is_t4(lldi->adapter_type);
1377 unsigned int linkspeed;
1378 unsigned int rcv_winf, snd_winf;
1379
1380 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1381 "csk 0x%p,%u,0x%lx,%u.\n",
1382 csk, csk->state, csk->flags, csk->tid);
1383
1384 if (csk->csk_family == AF_INET)
1385 daddr = &csk->daddr.sin_addr.s_addr;
1386 #if IS_ENABLED(CONFIG_IPV6)
1387 else if (csk->csk_family == AF_INET6)
1388 daddr = &csk->daddr6.sin6_addr;
1389 #endif
1390 else {
1391 pr_err("address family 0x%x not supported\n", csk->csk_family);
1392 goto rel_resource;
1393 }
1394
1395 n = dst_neigh_lookup(csk->dst, daddr);
1396
1397 if (!n) {
1398 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1399 goto rel_resource;
1400 }
1401
1402 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1403 if (csk->atid < 0) {
1404 pr_err("%s, NO atid available.\n", ndev->name);
1405 return -EINVAL;
1406 }
1407 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1408 cxgbi_sock_get(csk);
1409
1410 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1411 if (!csk->l2t) {
1412 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1413 goto rel_resource_without_clip;
1414 }
1415 cxgbi_sock_get(csk);
1416
1417 #if IS_ENABLED(CONFIG_IPV6)
1418 if (csk->csk_family == AF_INET6)
1419 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1420 #endif
1421
1422 if (t4) {
1423 size = sizeof(struct cpl_act_open_req);
1424 size6 = sizeof(struct cpl_act_open_req6);
1425 } else {
1426 size = sizeof(struct cpl_t5_act_open_req);
1427 size6 = sizeof(struct cpl_t5_act_open_req6);
1428 }
1429
1430 if (csk->csk_family == AF_INET)
1431 skb = alloc_wr(size, 0, GFP_NOIO);
1432 #if IS_ENABLED(CONFIG_IPV6)
1433 else
1434 skb = alloc_wr(size6, 0, GFP_NOIO);
1435 #endif
1436
1437 if (!skb)
1438 goto rel_resource;
1439 skb->sk = (struct sock *)csk;
1440 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1441
1442 if (!csk->mtu)
1443 csk->mtu = dst_mtu(csk->dst);
1444 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1445 csk->tx_chan = cxgb4_port_chan(ndev);
1446 /* SMT two entries per row */
1447 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1448 step = lldi->ntxq / lldi->nchan;
1449 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1450 step = lldi->nrxq / lldi->nchan;
1451 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1452 linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1453 csk->snd_win = cxgb4i_snd_win;
1454 csk->rcv_win = cxgb4i_rcv_win;
1455 if (cxgb4i_rcv_win <= 0) {
1456 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1457 rcv_winf = linkspeed / SPEED_10000;
1458 if (rcv_winf)
1459 csk->rcv_win *= rcv_winf;
1460 }
1461 if (cxgb4i_snd_win <= 0) {
1462 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1463 snd_winf = linkspeed / SPEED_10000;
1464 if (snd_winf)
1465 csk->snd_win *= snd_winf;
1466 }
1467 csk->wr_cred = lldi->wr_cred -
1468 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1469 csk->wr_max_cred = csk->wr_cred;
1470 csk->wr_una_cred = 0;
1471 cxgbi_sock_reset_wr_list(csk);
1472 csk->err = 0;
1473
1474 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1475 (&csk->saddr), (&csk->daddr), csk, csk->state,
1476 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1477 csk->mtu, csk->mss_idx, csk->smac_idx);
1478
1479 /* must wait for either a act_open_rpl or act_open_establish */
1480 try_module_get(THIS_MODULE);
1481 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1482 if (csk->csk_family == AF_INET)
1483 send_act_open_req(csk, skb, csk->l2t);
1484 #if IS_ENABLED(CONFIG_IPV6)
1485 else
1486 send_act_open_req6(csk, skb, csk->l2t);
1487 #endif
1488 neigh_release(n);
1489
1490 return 0;
1491
1492 rel_resource:
1493 #if IS_ENABLED(CONFIG_IPV6)
1494 if (csk->csk_family == AF_INET6)
1495 cxgb4_clip_release(ndev,
1496 (const u32 *)&csk->saddr6.sin6_addr, 1);
1497 #endif
1498 rel_resource_without_clip:
1499 if (n)
1500 neigh_release(n);
1501 if (skb)
1502 __kfree_skb(skb);
1503 return -EINVAL;
1504 }
1505
1506 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1507 [CPL_ACT_ESTABLISH] = do_act_establish,
1508 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1509 [CPL_PEER_CLOSE] = do_peer_close,
1510 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1511 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1512 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1513 [CPL_FW4_ACK] = do_fw4_ack,
1514 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1515 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1516 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1517 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1518 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1519 [CPL_RX_DATA] = do_rx_data,
1520 };
1521
1522 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1523 {
1524 int rc;
1525
1526 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1527 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1528
1529 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1530 cxgb4i_max_connect);
1531 if (rc < 0)
1532 return rc;
1533
1534 cdev->csk_release_offload_resources = release_offload_resources;
1535 cdev->csk_push_tx_frames = push_tx_frames;
1536 cdev->csk_send_abort_req = send_abort_req;
1537 cdev->csk_send_close_req = send_close_req;
1538 cdev->csk_send_rx_credits = send_rx_credits;
1539 cdev->csk_alloc_cpls = alloc_cpls;
1540 cdev->csk_init_act_open = init_act_open;
1541
1542 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1543 return 0;
1544 }
1545
1546 /*
1547 * functions to program the pagepod in h/w
1548 */
1549 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1550 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1551 struct ulp_mem_io *req,
1552 unsigned int wr_len, unsigned int dlen,
1553 unsigned int pm_addr)
1554 {
1555 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1556
1557 INIT_ULPTX_WR(req, wr_len, 0, 0);
1558 if (is_t4(lldi->adapter_type))
1559 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1560 (ULP_MEMIO_ORDER_F));
1561 else
1562 req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1563 (T5_ULP_MEMIO_IMM_F));
1564 req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1565 req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1566 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1567
1568 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1569 idata->len = htonl(dlen);
1570 }
1571
1572 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1573 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1574 unsigned int npods,
1575 struct cxgbi_gather_list *gl,
1576 unsigned int gl_pidx)
1577 {
1578 struct cxgbi_ddp_info *ddp = cdev->ddp;
1579 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1580 struct sk_buff *skb;
1581 struct ulp_mem_io *req;
1582 struct ulptx_idata *idata;
1583 struct cxgbi_pagepod *ppod;
1584 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1585 unsigned int dlen = PPOD_SIZE * npods;
1586 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1587 sizeof(struct ulptx_idata) + dlen, 16);
1588 unsigned int i;
1589
1590 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1591 if (!skb) {
1592 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1593 cdev, idx, npods);
1594 return -ENOMEM;
1595 }
1596 req = (struct ulp_mem_io *)skb->head;
1597 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
1598
1599 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
1600 idata = (struct ulptx_idata *)(req + 1);
1601 ppod = (struct cxgbi_pagepod *)(idata + 1);
1602
1603 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1604 if (!hdr && !gl)
1605 cxgbi_ddp_ppod_clear(ppod);
1606 else
1607 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1608 }
1609
1610 cxgb4_ofld_send(cdev->ports[port_id], skb);
1611 return 0;
1612 }
1613
1614 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1615 unsigned int idx, unsigned int npods,
1616 struct cxgbi_gather_list *gl)
1617 {
1618 unsigned int i, cnt;
1619 int err = 0;
1620
1621 for (i = 0; i < npods; i += cnt, idx += cnt) {
1622 cnt = npods - i;
1623 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1624 cnt = ULPMEM_IDATA_MAX_NPPODS;
1625 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1626 idx, cnt, gl, 4 * i);
1627 if (err < 0)
1628 break;
1629 }
1630 return err;
1631 }
1632
1633 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1634 unsigned int idx, unsigned int npods)
1635 {
1636 unsigned int i, cnt;
1637 int err;
1638
1639 for (i = 0; i < npods; i += cnt, idx += cnt) {
1640 cnt = npods - i;
1641 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1642 cnt = ULPMEM_IDATA_MAX_NPPODS;
1643 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1644 idx, cnt, NULL, 0);
1645 if (err < 0)
1646 break;
1647 }
1648 }
1649
1650 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1651 int pg_idx, bool reply)
1652 {
1653 struct sk_buff *skb;
1654 struct cpl_set_tcb_field *req;
1655
1656 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1657 return 0;
1658
1659 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1660 if (!skb)
1661 return -ENOMEM;
1662
1663 /* set up ulp page size */
1664 req = (struct cpl_set_tcb_field *)skb->head;
1665 INIT_TP_WR(req, csk->tid);
1666 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1667 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1668 req->word_cookie = htons(0);
1669 req->mask = cpu_to_be64(0x3 << 8);
1670 req->val = cpu_to_be64(pg_idx << 8);
1671 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1672
1673 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1674 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1675
1676 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1677 return 0;
1678 }
1679
1680 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1681 int hcrc, int dcrc, int reply)
1682 {
1683 struct sk_buff *skb;
1684 struct cpl_set_tcb_field *req;
1685
1686 if (!hcrc && !dcrc)
1687 return 0;
1688
1689 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1690 if (!skb)
1691 return -ENOMEM;
1692
1693 csk->hcrc_len = (hcrc ? 4 : 0);
1694 csk->dcrc_len = (dcrc ? 4 : 0);
1695 /* set up ulp submode */
1696 req = (struct cpl_set_tcb_field *)skb->head;
1697 INIT_TP_WR(req, tid);
1698 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1699 req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1700 req->word_cookie = htons(0);
1701 req->mask = cpu_to_be64(0x3 << 4);
1702 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1703 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1704 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1705
1706 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1707 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1708
1709 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1710 return 0;
1711 }
1712
1713 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1714 {
1715 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1716 struct cxgbi_ddp_info *ddp = cdev->ddp;
1717 unsigned int tagmask, pgsz_factor[4];
1718 int err;
1719
1720 if (ddp) {
1721 kref_get(&ddp->refcnt);
1722 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1723 cdev, cdev->ddp);
1724 return -EALREADY;
1725 }
1726
1727 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1728 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1729 lldi->iscsi_iolen, lldi->iscsi_iolen);
1730 if (err < 0)
1731 return err;
1732
1733 ddp = cdev->ddp;
1734
1735 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1736 cxgbi_ddp_page_size_factor(pgsz_factor);
1737 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1738
1739 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1740 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1741 cdev->csk_ddp_set = ddp_set_map;
1742 cdev->csk_ddp_clear = ddp_clear_map;
1743
1744 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1745 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1746 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1747 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1748 " %u/%u.\n",
1749 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1750 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1751 ddp->max_rxsz, lldi->iscsi_iolen);
1752 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1753 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1754 ddp->max_rxsz);
1755 return 0;
1756 }
1757
1758 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1759 {
1760 struct cxgbi_device *cdev;
1761 struct port_info *pi;
1762 int i, rc;
1763
1764 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1765 if (!cdev) {
1766 pr_info("t4 device 0x%p, register failed.\n", lldi);
1767 return NULL;
1768 }
1769 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1770 cdev, lldi->adapter_type, lldi->nports,
1771 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1772 lldi->nrxq, lldi->wr_cred);
1773 for (i = 0; i < lldi->nrxq; i++)
1774 log_debug(1 << CXGBI_DBG_DEV,
1775 "t4 0x%p, rxq id #%d: %u.\n",
1776 cdev, i, lldi->rxq_ids[i]);
1777
1778 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1779 cdev->flags = CXGBI_FLAG_DEV_T4;
1780 cdev->pdev = lldi->pdev;
1781 cdev->ports = lldi->ports;
1782 cdev->nports = lldi->nports;
1783 cdev->mtus = lldi->mtus;
1784 cdev->nmtus = NMTUS;
1785 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1786 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1787 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1788 cdev->itp = &cxgb4i_iscsi_transport;
1789
1790 cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
1791 << FW_VIID_PFN_S;
1792 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1793 cdev, lldi->ports[0]->name, cdev->pfvf);
1794
1795 rc = cxgb4i_ddp_init(cdev);
1796 if (rc) {
1797 pr_info("t4 0x%p ddp init failed.\n", cdev);
1798 goto err_out;
1799 }
1800 rc = cxgb4i_ofld_init(cdev);
1801 if (rc) {
1802 pr_info("t4 0x%p ofld init failed.\n", cdev);
1803 goto err_out;
1804 }
1805
1806 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1807 &cxgb4i_host_template, cxgb4i_stt);
1808 if (rc)
1809 goto err_out;
1810
1811 for (i = 0; i < cdev->nports; i++) {
1812 pi = netdev_priv(lldi->ports[i]);
1813 cdev->hbas[i]->port_id = pi->port_id;
1814 }
1815 return cdev;
1816
1817 err_out:
1818 cxgbi_device_unregister(cdev);
1819 return ERR_PTR(-ENOMEM);
1820 }
1821
1822 #define RX_PULL_LEN 128
1823 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1824 const struct pkt_gl *pgl)
1825 {
1826 const struct cpl_act_establish *rpl;
1827 struct sk_buff *skb;
1828 unsigned int opc;
1829 struct cxgbi_device *cdev = handle;
1830
1831 if (pgl == NULL) {
1832 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1833
1834 skb = alloc_wr(len, 0, GFP_ATOMIC);
1835 if (!skb)
1836 goto nomem;
1837 skb_copy_to_linear_data(skb, &rsp[1], len);
1838 } else {
1839 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1840 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1841 pgl->va, be64_to_cpu(*rsp),
1842 be64_to_cpu(*(u64 *)pgl->va),
1843 pgl->tot_len);
1844 return 0;
1845 }
1846 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1847 if (unlikely(!skb))
1848 goto nomem;
1849 }
1850
1851 rpl = (struct cpl_act_establish *)skb->data;
1852 opc = rpl->ot.opcode;
1853 log_debug(1 << CXGBI_DBG_TOE,
1854 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1855 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1856 if (cxgb4i_cplhandlers[opc])
1857 cxgb4i_cplhandlers[opc](cdev, skb);
1858 else {
1859 pr_err("No handler for opcode 0x%x.\n", opc);
1860 __kfree_skb(skb);
1861 }
1862 return 0;
1863 nomem:
1864 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1865 return 1;
1866 }
1867
1868 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1869 {
1870 struct cxgbi_device *cdev = handle;
1871
1872 switch (state) {
1873 case CXGB4_STATE_UP:
1874 pr_info("cdev 0x%p, UP.\n", cdev);
1875 break;
1876 case CXGB4_STATE_START_RECOVERY:
1877 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1878 /* close all connections */
1879 break;
1880 case CXGB4_STATE_DOWN:
1881 pr_info("cdev 0x%p, DOWN.\n", cdev);
1882 break;
1883 case CXGB4_STATE_DETACH:
1884 pr_info("cdev 0x%p, DETACH.\n", cdev);
1885 cxgbi_device_unregister(cdev);
1886 break;
1887 default:
1888 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1889 break;
1890 }
1891 return 0;
1892 }
1893
1894 static int __init cxgb4i_init_module(void)
1895 {
1896 int rc;
1897
1898 printk(KERN_INFO "%s", version);
1899
1900 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1901 if (rc < 0)
1902 return rc;
1903 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1904
1905 return 0;
1906 }
1907
1908 static void __exit cxgb4i_exit_module(void)
1909 {
1910 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1911 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1912 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1913 }
1914
1915 module_init(cxgb4i_init_module);
1916 module_exit(cxgb4i_exit_module);
Linux kernel - Deliverables
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