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Merge tag 'samsung-fixes-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
CommitLineData
7b36b6e0 1/*
2 * cxgb4i.c: Chelsio T4 iSCSI driver.
3 *
4 * Copyright (c) 2010 Chelsio Communications, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Rakesh Ranjan (rranjan@chelsio.com)
12 */
13
14#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
15
7b36b6e0 16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <scsi/scsi_host.h>
19#include <net/tcp.h>
20#include <net/dst.h>
21#include <linux/netdevice.h>
759a0cc5 22#include <net/addrconf.h>
7b36b6e0 23
3bd3e8bf 24#include "t4_regs.h"
7b36b6e0 25#include "t4_msg.h"
26#include "cxgb4.h"
27#include "cxgb4_uld.h"
28#include "t4fw_api.h"
29#include "l2t.h"
30#include "cxgb4i.h"
31
32static unsigned int dbg_level;
33
34#include "../libcxgbi.h"
35
36#define DRV_MODULE_NAME "cxgb4i"
3bd3e8bf
KX		 37#define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
38#define DRV_MODULE_VERSION "0.9.4"
7b36b6e0 39
40static char version[] =
41 DRV_MODULE_DESC " " DRV_MODULE_NAME
3bd3e8bf 42 " v" DRV_MODULE_VERSION "\n";
7b36b6e0 43
44MODULE_AUTHOR("Chelsio Communications, Inc.");
45MODULE_DESCRIPTION(DRV_MODULE_DESC);
46MODULE_VERSION(DRV_MODULE_VERSION);
47MODULE_LICENSE("GPL");
48
49module_param(dbg_level, uint, 0644);
50MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
51
52static int cxgb4i_rcv_win = 256 * 1024;
53module_param(cxgb4i_rcv_win, int, 0644);
54MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
55
56static int cxgb4i_snd_win = 128 * 1024;
57module_param(cxgb4i_snd_win, int, 0644);
58MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
59
60static int cxgb4i_rx_credit_thres = 10 * 1024;
61module_param(cxgb4i_rx_credit_thres, int, 0644);
62MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
63 "RX credits return threshold in bytes (default=10KB)");
64
65static unsigned int cxgb4i_max_connect = (8 * 1024);
66module_param(cxgb4i_max_connect, uint, 0644);
67MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
68
69static unsigned short cxgb4i_sport_base = 20000;
70module_param(cxgb4i_sport_base, ushort, 0644);
71MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
72
73typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
74
75static void *t4_uld_add(const struct cxgb4_lld_info *);
76static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
77static int t4_uld_state_change(void *, enum cxgb4_state state);
78
79static const struct cxgb4_uld_info cxgb4i_uld_info = {
80 .name = DRV_MODULE_NAME,
81 .add = t4_uld_add,
82 .rx_handler = t4_uld_rx_handler,
83 .state_change = t4_uld_state_change,
84};
85
86static struct scsi_host_template cxgb4i_host_template = {
87 .module = THIS_MODULE,
88 .name = DRV_MODULE_NAME,
89 .proc_name = DRV_MODULE_NAME,
90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
91 .queuecommand = iscsi_queuecommand,
92 .change_queue_depth = iscsi_change_queue_depth,
93 .sg_tablesize = SG_ALL,
94 .max_sectors = 0xFFFF,
95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
96 .eh_abort_handler = iscsi_eh_abort,
97 .eh_device_reset_handler = iscsi_eh_device_reset,
98 .eh_target_reset_handler = iscsi_eh_recover_target,
99 .target_alloc = iscsi_target_alloc,
100 .use_clustering = DISABLE_CLUSTERING,
101 .this_id = -1,
102};
103
104static struct iscsi_transport cxgb4i_iscsi_transport = {
105 .owner = THIS_MODULE,
106 .name = DRV_MODULE_NAME,
107 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
108 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
fdafd4df 109 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
3128c6c7 110 .attr_is_visible = cxgbi_attr_is_visible,
7b36b6e0 111 .get_host_param = cxgbi_get_host_param,
112 .set_host_param = cxgbi_set_host_param,
113 /* session management */
114 .create_session = cxgbi_create_session,
115 .destroy_session = cxgbi_destroy_session,
116 .get_session_param = iscsi_session_get_param,
117 /* connection management */
118 .create_conn = cxgbi_create_conn,
119 .bind_conn = cxgbi_bind_conn,
120 .destroy_conn = iscsi_tcp_conn_teardown,
121 .start_conn = iscsi_conn_start,
122 .stop_conn = iscsi_conn_stop,
c71b9b66 123 .get_conn_param = iscsi_conn_get_param,
7b36b6e0 124 .set_param = cxgbi_set_conn_param,
125 .get_stats = cxgbi_get_conn_stats,
126 /* pdu xmit req from user space */
127 .send_pdu = iscsi_conn_send_pdu,
128 /* task */
129 .init_task = iscsi_tcp_task_init,
130 .xmit_task = iscsi_tcp_task_xmit,
131 .cleanup_task = cxgbi_cleanup_task,
132 /* pdu */
133 .alloc_pdu = cxgbi_conn_alloc_pdu,
134 .init_pdu = cxgbi_conn_init_pdu,
135 .xmit_pdu = cxgbi_conn_xmit_pdu,
136 .parse_pdu_itt = cxgbi_parse_pdu_itt,
137 /* TCP connect/disconnect */
c71b9b66 138 .get_ep_param = cxgbi_get_ep_param,
7b36b6e0 139 .ep_connect = cxgbi_ep_connect,
140 .ep_poll = cxgbi_ep_poll,
141 .ep_disconnect = cxgbi_ep_disconnect,
142 /* Error recovery timeout call */
143 .session_recovery_timedout = iscsi_session_recovery_timedout,
144};
145
146static struct scsi_transport_template *cxgb4i_stt;
147
148/*
149 * CPL (Chelsio Protocol Language) defines a message passing interface between
150 * the host driver and Chelsio asic.
151 * The section below implments CPLs that related to iscsi tcp connection
152 * open/close/abort and data send/receive.
153 */
759a0cc5 154
7b36b6e0 155#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
156#define RCV_BUFSIZ_MASK 0x3FFU
157#define MAX_IMM_TX_PKT_LEN 128
158
159static inline void set_queue(struct sk_buff *skb, unsigned int queue,
160 const struct cxgbi_sock *csk)
161{
162 skb->queue_mapping = queue;
163}
164
165static 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 */
174static inline int is_ofld_imm(const struct sk_buff *skb)
175{
176 return skb->len <= (MAX_IMM_TX_PKT_LEN -
177 sizeof(struct fw_ofld_tx_data_wr));
178}
179
180static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
181 struct l2t_entry *e)
182{
3bd3e8bf 183 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
759a0cc5 184 int t4 = is_t4(lldi->adapter_type);
7b36b6e0 185 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
186 unsigned long long opt0;
187 unsigned int opt2;
188 unsigned int qid_atid = ((unsigned int)csk->atid) |
189 (((unsigned int)csk->rss_qid) << 14);
190
191 opt0 = KEEP_ALIVE(1) |
192 WND_SCALE(wscale) |
193 MSS_IDX(csk->mss_idx) |
194 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
195 TX_CHAN(csk->tx_chan) |
196 SMAC_SEL(csk->smac_idx) |
197 ULP_MODE(ULP_MODE_ISCSI) |
198 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
199 opt2 = RX_CHANNEL(0) |
200 RSS_QUEUE_VALID |
3bd3e8bf 201 (1 << 20) |
7b36b6e0 202 RSS_QUEUE(csk->rss_qid);
203
3bd3e8bf
KX		 204 if (is_t4(lldi->adapter_type)) {
205 struct cpl_act_open_req *req =
206 (struct cpl_act_open_req *)skb->head;
207
3bd3e8bf
KX		 208 INIT_TP_WR(req, 0);
209 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
7b36b6e0 210 qid_atid));
3bd3e8bf
KX		 211 req->local_port = csk->saddr.sin_port;
212 req->peer_port = csk->daddr.sin_port;
213 req->local_ip = csk->saddr.sin_addr.s_addr;
214 req->peer_ip = csk->daddr.sin_addr.s_addr;
215 req->opt0 = cpu_to_be64(opt0);
ac0245ff
KX		 216 req->params = cpu_to_be32(cxgb4_select_ntuple(
217 csk->cdev->ports[csk->port_id],
218 csk->l2t));
3bd3e8bf
KX		 219 opt2 |= 1 << 22;
220 req->opt2 = cpu_to_be32(opt2);
7b36b6e0 221
3bd3e8bf
KX		 222 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
223 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
224 csk, &req->local_ip, ntohs(req->local_port),
225 &req->peer_ip, ntohs(req->peer_port),
226 csk->atid, csk->rss_qid);
227 } else {
228 struct cpl_t5_act_open_req *req =
229 (struct cpl_t5_act_open_req *)skb->head;
230
3bd3e8bf
KX		 231 INIT_TP_WR(req, 0);
232 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
233 qid_atid));
234 req->local_port = csk->saddr.sin_port;
235 req->peer_port = csk->daddr.sin_port;
236 req->local_ip = csk->saddr.sin_addr.s_addr;
237 req->peer_ip = csk->daddr.sin_addr.s_addr;
238 req->opt0 = cpu_to_be64(opt0);
ac0245ff
KX		 239 req->params = cpu_to_be64(V_FILTER_TUPLE(
240 cxgb4_select_ntuple(
241 csk->cdev->ports[csk->port_id],
242 csk->l2t)));
3bd3e8bf
KX		 243 opt2 |= 1 << 31;
244 req->opt2 = cpu_to_be32(opt2);
245
246 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
247 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
248 csk, &req->local_ip, ntohs(req->local_port),
249 &req->peer_ip, ntohs(req->peer_port),
250 csk->atid, csk->rss_qid);
251 }
252
253 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
759a0cc5
AB		 254
255 pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
256 (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
257 csk->state, csk->flags, csk->atid, csk->rss_qid);
258
259 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
260}
261
f42bb57c 262#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 263static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
264 struct l2t_entry *e)
265{
266 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
267 int t4 = is_t4(lldi->adapter_type);
268 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
269 unsigned long long opt0;
270 unsigned int opt2;
271 unsigned int qid_atid = ((unsigned int)csk->atid) |
272 (((unsigned int)csk->rss_qid) << 14);
273
274 opt0 = KEEP_ALIVE(1) |
275 WND_SCALE(wscale) |
276 MSS_IDX(csk->mss_idx) |
277 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
278 TX_CHAN(csk->tx_chan) |
279 SMAC_SEL(csk->smac_idx) |
280 ULP_MODE(ULP_MODE_ISCSI) |
281 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
282
283 opt2 = RX_CHANNEL(0) |
284 RSS_QUEUE_VALID |
285 RX_FC_DISABLE |
286 RSS_QUEUE(csk->rss_qid);
287
288 if (t4) {
289 struct cpl_act_open_req6 *req =
290 (struct cpl_act_open_req6 *)skb->head;
291
292 INIT_TP_WR(req, 0);
293 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
294 qid_atid));
295 req->local_port = csk->saddr6.sin6_port;
296 req->peer_port = csk->daddr6.sin6_port;
297
298 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
299 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
300 8);
301 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
302 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
303 8);
304
305 req->opt0 = cpu_to_be64(opt0);
306
307 opt2 |= RX_FC_VALID;
308 req->opt2 = cpu_to_be32(opt2);
309
310 req->params = cpu_to_be32(cxgb4_select_ntuple(
311 csk->cdev->ports[csk->port_id],
312 csk->l2t));
313 } else {
314 struct cpl_t5_act_open_req6 *req =
315 (struct cpl_t5_act_open_req6 *)skb->head;
316
317 INIT_TP_WR(req, 0);
318 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
319 qid_atid));
320 req->local_port = csk->saddr6.sin6_port;
321 req->peer_port = csk->daddr6.sin6_port;
322 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
323 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
324 8);
325 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
326 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
327 8);
328 req->opt0 = cpu_to_be64(opt0);
329
330 opt2 |= T5_OPT_2_VALID;
331 req->opt2 = cpu_to_be32(opt2);
332
333 req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
334 csk->cdev->ports[csk->port_id],
335 csk->l2t)));
336 }
337
338 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
339
340 pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
341 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
342 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
343 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
344 csk->rss_qid);
345
7b36b6e0 346 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
347}
f42bb57c 348#endif
7b36b6e0 349
350static void send_close_req(struct cxgbi_sock *csk)
351{
352 struct sk_buff *skb = csk->cpl_close;
353 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
354 unsigned int tid = csk->tid;
355
356 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
357 "csk 0x%p,%u,0x%lx, tid %u.\n",
358 csk, csk->state, csk->flags, csk->tid);
359 csk->cpl_close = NULL;
360 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
361 INIT_TP_WR(req, tid);
362 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
363 req->rsvd = 0;
364
365 cxgbi_sock_skb_entail(csk, skb);
366 if (csk->state >= CTP_ESTABLISHED)
367 push_tx_frames(csk, 1);
368}
369
370static void abort_arp_failure(void *handle, struct sk_buff *skb)
371{
372 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
373 struct cpl_abort_req *req;
374
375 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
376 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
377 csk, csk->state, csk->flags, csk->tid);
378 req = (struct cpl_abort_req *)skb->data;
379 req->cmd = CPL_ABORT_NO_RST;
380 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
381}
382
383static void send_abort_req(struct cxgbi_sock *csk)
384{
385 struct cpl_abort_req *req;
386 struct sk_buff *skb = csk->cpl_abort_req;
387
388 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
389 return;
390 cxgbi_sock_set_state(csk, CTP_ABORTING);
391 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
392 cxgbi_sock_purge_write_queue(csk);
393
394 csk->cpl_abort_req = NULL;
395 req = (struct cpl_abort_req *)skb->head;
396 set_queue(skb, CPL_PRIORITY_DATA, csk);
397 req->cmd = CPL_ABORT_SEND_RST;
398 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
399 INIT_TP_WR(req, csk->tid);
400 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
401 req->rsvd0 = htonl(csk->snd_nxt);
402 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
403
404 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
405 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
406 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
407 req->rsvd1);
408
409 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
410}
411
412static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
413{
414 struct sk_buff *skb = csk->cpl_abort_rpl;
415 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
416
417 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
418 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
419 csk, csk->state, csk->flags, csk->tid, rst_status);
420
421 csk->cpl_abort_rpl = NULL;
422 set_queue(skb, CPL_PRIORITY_DATA, csk);
423 INIT_TP_WR(rpl, csk->tid);
424 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
425 rpl->cmd = rst_status;
426 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
427}
428
429/*
430 * CPL connection rx data ack: host ->
431 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
432 * credits sent.
433 */
434static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
435{
436 struct sk_buff *skb;
437 struct cpl_rx_data_ack *req;
438
439 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
440 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
441 csk, csk->state, csk->flags, csk->tid, credits);
442
24d3f95a 443 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
7b36b6e0 444 if (!skb) {
445 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
446 return 0;
447 }
448 req = (struct cpl_rx_data_ack *)skb->head;
449
450 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
451 INIT_TP_WR(req, csk->tid);
452 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
453 csk->tid));
454 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
455 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
456 return credits;
457}
458
459/*
460 * sgl_len - calculates the size of an SGL of the given capacity
461 * @n: the number of SGL entries
462 * Calculates the number of flits needed for a scatter/gather list that
463 * can hold the given number of entries.
464 */
465static inline unsigned int sgl_len(unsigned int n)
466{
467 n--;
468 return (3 * n) / 2 + (n & 1) + 2;
469}
470
471/*
472 * calc_tx_flits_ofld - calculate # of flits for an offload packet
473 * @skb: the packet
474 *
475 * Returns the number of flits needed for the given offload packet.
476 * These packets are already fully constructed and no additional headers
477 * will be added.
478 */
479static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
480{
481 unsigned int flits, cnt;
482
483 if (is_ofld_imm(skb))
484 return DIV_ROUND_UP(skb->len, 8);
485 flits = skb_transport_offset(skb) / 8;
486 cnt = skb_shinfo(skb)->nr_frags;
499e2e6f 487 if (skb_tail_pointer(skb) != skb_transport_header(skb))
7b36b6e0 488 cnt++;
489 return flits + sgl_len(cnt);
490}
491
492static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
493{
494 struct sk_buff *skb;
495 struct fw_flowc_wr *flowc;
496 int flowclen, i;
497
498 flowclen = 80;
24d3f95a 499 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
7b36b6e0 500 flowc = (struct fw_flowc_wr *)skb->head;
501 flowc->op_to_nparams =
502 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
503 flowc->flowid_len16 =
504 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
505 FW_WR_FLOWID(csk->tid));
506 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
e27d6169 507 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
7b36b6e0 508 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
509 flowc->mnemval[1].val = htonl(csk->tx_chan);
510 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
511 flowc->mnemval[2].val = htonl(csk->tx_chan);
512 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
513 flowc->mnemval[3].val = htonl(csk->rss_qid);
514 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
515 flowc->mnemval[4].val = htonl(csk->snd_nxt);
516 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
517 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
518 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
519 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
520 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
521 flowc->mnemval[7].val = htonl(csk->advmss);
522 flowc->mnemval[8].mnemonic = 0;
523 flowc->mnemval[8].val = 0;
524 for (i = 0; i < 9; i++) {
525 flowc->mnemval[i].r4[0] = 0;
526 flowc->mnemval[i].r4[1] = 0;
527 flowc->mnemval[i].r4[2] = 0;
528 }
529 set_queue(skb, CPL_PRIORITY_DATA, csk);
530
531 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
532 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
533 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
534 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
535 csk->advmss);
536
537 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
538}
539
540static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
541 int dlen, int len, u32 credits, int compl)
542{
543 struct fw_ofld_tx_data_wr *req;
544 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
545 unsigned int wr_ulp_mode = 0;
546
547 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
548
549 if (is_ofld_imm(skb)) {
550 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
551 FW_WR_COMPL(1) |
552 FW_WR_IMMDLEN(dlen));
553 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
554 FW_WR_LEN16(credits));
555 } else {
556 req->op_to_immdlen =
557 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
558 FW_WR_COMPL(1) |
559 FW_WR_IMMDLEN(0));
560 req->flowid_len16 =
561 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
562 FW_WR_LEN16(credits));
563 }
564 if (submode)
565 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
566 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
6aca4112
KX		 567 req->tunnel_to_proxy = htonl(wr_ulp_mode |
568 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1));
7b36b6e0 569 req->plen = htonl(len);
570 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
571 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
572}
573
574static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
575{
576 kfree_skb(skb);
577}
578
579static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
580{
581 int total_size = 0;
582 struct sk_buff *skb;
583
584 if (unlikely(csk->state < CTP_ESTABLISHED ||
585 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
586 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
587 1 << CXGBI_DBG_PDU_TX,
588 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
589 csk, csk->state, csk->flags, csk->tid);
590 return 0;
591 }
592
593 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
594 int dlen = skb->len;
595 int len = skb->len;
596 unsigned int credits_needed;
597
598 skb_reset_transport_header(skb);
599 if (is_ofld_imm(skb))
600 credits_needed = DIV_ROUND_UP(dlen +
601 sizeof(struct fw_ofld_tx_data_wr), 16);
602 else
603 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
604 + sizeof(struct fw_ofld_tx_data_wr),
605 16);
606
607 if (csk->wr_cred < credits_needed) {
608 log_debug(1 << CXGBI_DBG_PDU_TX,
609 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
610 csk, skb->len, skb->data_len,
611 credits_needed, csk->wr_cred);
612 break;
613 }
614 __skb_unlink(skb, &csk->write_queue);
615 set_queue(skb, CPL_PRIORITY_DATA, csk);
616 skb->csum = credits_needed;
617 csk->wr_cred -= credits_needed;
618 csk->wr_una_cred += credits_needed;
619 cxgbi_sock_enqueue_wr(csk, skb);
620
621 log_debug(1 << CXGBI_DBG_PDU_TX,
622 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
623 csk, skb->len, skb->data_len, credits_needed,
624 csk->wr_cred, csk->wr_una_cred);
625
626 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
627 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
628 send_tx_flowc_wr(csk);
629 skb->csum += 5;
630 csk->wr_cred -= 5;
631 csk->wr_una_cred += 5;
632 }
633 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
634 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
635 req_completion);
636 csk->snd_nxt += len;
637 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
638 }
639 total_size += skb->truesize;
640 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
641
642 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
643 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
644 csk, csk->state, csk->flags, csk->tid, skb, len);
645
646 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
647 }
648 return total_size;
649}
650
651static inline void free_atid(struct cxgbi_sock *csk)
652{
653 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
654
655 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
656 cxgb4_free_atid(lldi->tids, csk->atid);
657 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
658 cxgbi_sock_put(csk);
659 }
660}
661
662static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
663{
664 struct cxgbi_sock *csk;
665 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
666 unsigned short tcp_opt = ntohs(req->tcp_opt);
667 unsigned int tid = GET_TID(req);
668 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
669 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
670 struct tid_info *t = lldi->tids;
671 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
672
673 csk = lookup_atid(t, atid);
674 if (unlikely(!csk)) {
675 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
676 goto rel_skb;
677 }
678
e27d6169 679 if (csk->atid != atid) {
680 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
681 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
682 goto rel_skb;
683 }
684
759a0cc5
AB		 685 pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
686 (&csk->saddr), (&csk->daddr),
687 atid, tid, csk, csk->state, csk->flags, rcv_isn);
688
689 module_put(THIS_MODULE);
7b36b6e0 690
691 cxgbi_sock_get(csk);
692 csk->tid = tid;
693 cxgb4_insert_tid(lldi->tids, csk, tid);
694 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
695
696 free_atid(csk);
697
698 spin_lock_bh(&csk->lock);
699 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
700 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
701 csk, csk->state, csk->flags, csk->tid);
702
703 if (csk->retry_timer.function) {
704 del_timer(&csk->retry_timer);
705 csk->retry_timer.function = NULL;
706 }
707
708 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
709 /*
710 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
711 * pass through opt0.
712 */
713 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
714 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
715
716 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
717 if (GET_TCPOPT_TSTAMP(tcp_opt))
718 csk->advmss -= 12;
719 if (csk->advmss < 128)
720 csk->advmss = 128;
721
722 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
723 "csk 0x%p, mss_idx %u, advmss %u.\n",
724 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
725
726 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
727
728 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
729 send_abort_req(csk);
730 else {
731 if (skb_queue_len(&csk->write_queue))
732 push_tx_frames(csk, 0);
733 cxgbi_conn_tx_open(csk);
734 }
735 spin_unlock_bh(&csk->lock);
736
737rel_skb:
738 __kfree_skb(skb);
739}
740
741static int act_open_rpl_status_to_errno(int status)
742{
743 switch (status) {
744 case CPL_ERR_CONN_RESET:
745 return -ECONNREFUSED;
746 case CPL_ERR_ARP_MISS:
747 return -EHOSTUNREACH;
748 case CPL_ERR_CONN_TIMEDOUT:
749 return -ETIMEDOUT;
750 case CPL_ERR_TCAM_FULL:
751 return -ENOMEM;
752 case CPL_ERR_CONN_EXIST:
753 return -EADDRINUSE;
754 default:
755 return -EIO;
756 }
757}
758
759static void csk_act_open_retry_timer(unsigned long data)
760{
001586a7 761 struct sk_buff *skb = NULL;
7b36b6e0 762 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
3bd3e8bf 763 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
759a0cc5
AB		 764 void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
765 struct l2t_entry *);
766 int t4 = is_t4(lldi->adapter_type), size, size6;
7b36b6e0 767
768 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
769 "csk 0x%p,%u,0x%lx,%u.\n",
770 csk, csk->state, csk->flags, csk->tid);
771
772 cxgbi_sock_get(csk);
773 spin_lock_bh(&csk->lock);
759a0cc5
AB		 774
775 if (t4) {
776 size = sizeof(struct cpl_act_open_req);
777 size6 = sizeof(struct cpl_act_open_req6);
778 } else {
779 size = sizeof(struct cpl_t5_act_open_req);
780 size6 = sizeof(struct cpl_t5_act_open_req6);
781 }
782
783 if (csk->csk_family == AF_INET) {
784 send_act_open_func = send_act_open_req;
785 skb = alloc_wr(size, 0, GFP_ATOMIC);
f42bb57c 786#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 787 } else {
788 send_act_open_func = send_act_open_req6;
789 skb = alloc_wr(size6, 0, GFP_ATOMIC);
f42bb57c 790#endif
759a0cc5
AB		 791 }
792
7b36b6e0 793 if (!skb)
794 cxgbi_sock_fail_act_open(csk, -ENOMEM);
795 else {
796 skb->sk = (struct sock *)csk;
797 t4_set_arp_err_handler(skb, csk,
759a0cc5
AB		 798 cxgbi_sock_act_open_req_arp_failure);
799 send_act_open_func(csk, skb, csk->l2t);
7b36b6e0 800 }
759a0cc5 801
7b36b6e0 802 spin_unlock_bh(&csk->lock);
803 cxgbi_sock_put(csk);
759a0cc5 804
7b36b6e0 805}
806
807static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
808{
809 struct cxgbi_sock *csk;
810 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
811 unsigned int tid = GET_TID(rpl);
812 unsigned int atid =
813 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
814 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
815 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
816 struct tid_info *t = lldi->tids;
817
818 csk = lookup_atid(t, atid);
819 if (unlikely(!csk)) {
820 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
821 goto rel_skb;
822 }
823
759a0cc5
AB		 824 pr_info_ipaddr("tid %u/%u, status %u.\n"
825 "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
826 atid, tid, status, csk, csk->state, csk->flags);
7b36b6e0 827
150cca7c
KX		 828 if (status == CPL_ERR_RTX_NEG_ADVICE)
829 goto rel_skb;
830
ee7255ad
AB		 831 module_put(THIS_MODULE);
832
7b36b6e0 833 if (status && status != CPL_ERR_TCAM_FULL &&
834 status != CPL_ERR_CONN_EXIST &&
835 status != CPL_ERR_ARP_MISS)
836 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
837
838 cxgbi_sock_get(csk);
839 spin_lock_bh(&csk->lock);
840
841 if (status == CPL_ERR_CONN_EXIST &&
842 csk->retry_timer.function != csk_act_open_retry_timer) {
843 csk->retry_timer.function = csk_act_open_retry_timer;
844 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
845 } else
846 cxgbi_sock_fail_act_open(csk,
847 act_open_rpl_status_to_errno(status));
848
849 spin_unlock_bh(&csk->lock);
850 cxgbi_sock_put(csk);
851rel_skb:
852 __kfree_skb(skb);
853}
854
855static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
856{
857 struct cxgbi_sock *csk;
858 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
859 unsigned int tid = GET_TID(req);
860 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
861 struct tid_info *t = lldi->tids;
862
863 csk = lookup_tid(t, tid);
864 if (unlikely(!csk)) {
865 pr_err("can't find connection for tid %u.\n", tid);
866 goto rel_skb;
867 }
759a0cc5
AB		 868 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
869 (&csk->saddr), (&csk->daddr),
870 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 871 cxgbi_sock_rcv_peer_close(csk);
872rel_skb:
873 __kfree_skb(skb);
874}
875
876static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
877{
878 struct cxgbi_sock *csk;
879 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
880 unsigned int tid = GET_TID(rpl);
881 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
882 struct tid_info *t = lldi->tids;
883
884 csk = lookup_tid(t, tid);
885 if (unlikely(!csk)) {
886 pr_err("can't find connection for tid %u.\n", tid);
887 goto rel_skb;
888 }
759a0cc5
AB		 889 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
890 (&csk->saddr), (&csk->daddr),
891 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 892 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
893rel_skb:
894 __kfree_skb(skb);
895}
896
897static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
898 int *need_rst)
899{
900 switch (abort_reason) {
901 case CPL_ERR_BAD_SYN: /* fall through */
902 case CPL_ERR_CONN_RESET:
903 return csk->state > CTP_ESTABLISHED ?
904 -EPIPE : -ECONNRESET;
905 case CPL_ERR_XMIT_TIMEDOUT:
906 case CPL_ERR_PERSIST_TIMEDOUT:
907 case CPL_ERR_FINWAIT2_TIMEDOUT:
908 case CPL_ERR_KEEPALIVE_TIMEDOUT:
909 return -ETIMEDOUT;
910 default:
911 return -EIO;
912 }
913}
914
915static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
916{
917 struct cxgbi_sock *csk;
918 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
919 unsigned int tid = GET_TID(req);
920 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
921 struct tid_info *t = lldi->tids;
922 int rst_status = CPL_ABORT_NO_RST;
923
924 csk = lookup_tid(t, tid);
925 if (unlikely(!csk)) {
926 pr_err("can't find connection for tid %u.\n", tid);
927 goto rel_skb;
928 }
929
759a0cc5
AB		 930 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
931 (&csk->saddr), (&csk->daddr),
932 csk, csk->state, csk->flags, csk->tid, req->status);
7b36b6e0 933
934 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
935 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
936 goto rel_skb;
937
938 cxgbi_sock_get(csk);
939 spin_lock_bh(&csk->lock);
940
7b07bf24
AB		 941 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
942
943 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
944 send_tx_flowc_wr(csk);
945 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
7b36b6e0 946 }
947
7b07bf24
AB		 948 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
949 cxgbi_sock_set_state(csk, CTP_ABORTING);
950
7b36b6e0 951 send_abort_rpl(csk, rst_status);
952
953 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
954 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
955 cxgbi_sock_closed(csk);
956 }
7b07bf24 957
7b36b6e0 958 spin_unlock_bh(&csk->lock);
959 cxgbi_sock_put(csk);
960rel_skb:
961 __kfree_skb(skb);
962}
963
964static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
965{
966 struct cxgbi_sock *csk;
967 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
968 unsigned int tid = GET_TID(rpl);
969 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
970 struct tid_info *t = lldi->tids;
971
972 csk = lookup_tid(t, tid);
973 if (!csk)
974 goto rel_skb;
975
759a0cc5
AB		 976 if (csk)
977 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
978 (&csk->saddr), (&csk->daddr), csk,
979 csk->state, csk->flags, csk->tid, rpl->status);
7b36b6e0 980
981 if (rpl->status == CPL_ERR_ABORT_FAILED)
982 goto rel_skb;
983
984 cxgbi_sock_rcv_abort_rpl(csk);
985rel_skb:
986 __kfree_skb(skb);
987}
988
989static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
990{
991 struct cxgbi_sock *csk;
992 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
993 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
994 unsigned int tid = GET_TID(cpl);
995 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
996 struct tid_info *t = lldi->tids;
7b36b6e0 997
998 csk = lookup_tid(t, tid);
999 if (unlikely(!csk)) {
1000 pr_err("can't find conn. for tid %u.\n", tid);
1001 goto rel_skb;
1002 }
1003
1004 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1005 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1006 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1007 pdu_len_ddp);
1008
1009 spin_lock_bh(&csk->lock);
1010
1011 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1012 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1013 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1014 csk, csk->state, csk->flags, csk->tid);
1015 if (csk->state != CTP_ABORTING)
1016 goto abort_conn;
1017 else
1018 goto discard;
1019 }
1020
1021 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 1022 cxgbi_skcb_flags(skb) = 0;
1023
7b36b6e0 1024 skb_reset_transport_header(skb);
1025 __skb_pull(skb, sizeof(*cpl));
1026 __pskb_trim(skb, ntohs(cpl->len));
1027
1028 if (!csk->skb_ulp_lhdr) {
1029 unsigned char *bhs;
3bd3e8bf 1030 unsigned int hlen, dlen, plen;
7b36b6e0 1031
1032 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1033 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1034 csk, csk->state, csk->flags, csk->tid, skb);
1035 csk->skb_ulp_lhdr = skb;
e27d6169 1036 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 1037
e27d6169 1038 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 1039 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 1040 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 1041 csk->rcv_nxt);
1042 goto abort_conn;
1043 }
1044
e27d6169 1045 bhs = skb->data;
7b36b6e0 1046 hlen = ntohs(cpl->len);
1047 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1048
3bd3e8bf
KX		 1049 plen = ISCSI_PDU_LEN(pdu_len_ddp);
1050 if (is_t4(lldi->adapter_type))
1051 plen -= 40;
1052
1053 if ((hlen + dlen) != plen) {
7b36b6e0 1054 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1055 "mismatch %u != %u + %u, seq 0x%x.\n",
3bd3e8bf
KX		 1056 csk->tid, plen, hlen, dlen,
1057 cxgbi_skcb_tcp_seq(skb));
7b36b6e0 1058 goto abort_conn;
1059 }
1060
1061 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1062 if (dlen)
1063 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1064 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1065
1066 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1067 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1068 csk, skb, *bhs, hlen, dlen,
1069 ntohl(*((unsigned int *)(bhs + 16))),
1070 ntohl(*((unsigned int *)(bhs + 24))));
1071
1072 } else {
e27d6169 1073 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 1074
e27d6169 1075 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 1076 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1077 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1078 csk, csk->state, csk->flags, skb, lskb);
1079 }
1080
1081 __skb_queue_tail(&csk->receive_queue, skb);
1082 spin_unlock_bh(&csk->lock);
1083 return;
1084
1085abort_conn:
1086 send_abort_req(csk);
1087discard:
1088 spin_unlock_bh(&csk->lock);
1089rel_skb:
1090 __kfree_skb(skb);
1091}
1092
1093static void do_rx_data_ddp(struct cxgbi_device *cdev,
1094 struct sk_buff *skb)
1095{
1096 struct cxgbi_sock *csk;
1097 struct sk_buff *lskb;
1098 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1099 unsigned int tid = GET_TID(rpl);
1100 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1101 struct tid_info *t = lldi->tids;
1102 unsigned int status = ntohl(rpl->ddpvld);
1103
1104 csk = lookup_tid(t, tid);
1105 if (unlikely(!csk)) {
1106 pr_err("can't find connection for tid %u.\n", tid);
1107 goto rel_skb;
1108 }
1109
1110 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1111 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1112 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1113
1114 spin_lock_bh(&csk->lock);
1115
1116 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1117 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1118 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1119 csk, csk->state, csk->flags, csk->tid);
1120 if (csk->state != CTP_ABORTING)
1121 goto abort_conn;
1122 else
1123 goto discard;
1124 }
1125
1126 if (!csk->skb_ulp_lhdr) {
1127 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1128 goto abort_conn;
1129 }
1130
1131 lskb = csk->skb_ulp_lhdr;
1132 csk->skb_ulp_lhdr = NULL;
1133
7b36b6e0 1134 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1135
1136 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1137 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1138 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1139
1140 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
e27d6169 1141 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1142 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1143 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1144 }
1145 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
e27d6169 1146 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1147 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1148 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1149 }
1150 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1151 log_debug(1 << CXGBI_DBG_PDU_RX,
1152 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1153 csk, lskb, status);
1154 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1155 }
1156 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1157 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1158 log_debug(1 << CXGBI_DBG_PDU_RX,
1159 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1160 csk, lskb, status);
1161 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1162 }
1163 log_debug(1 << CXGBI_DBG_PDU_RX,
1164 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1165 csk, lskb, cxgbi_skcb_flags(lskb));
1166
e27d6169 1167 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1168 cxgbi_conn_pdu_ready(csk);
1169 spin_unlock_bh(&csk->lock);
1170 goto rel_skb;
1171
1172abort_conn:
1173 send_abort_req(csk);
1174discard:
1175 spin_unlock_bh(&csk->lock);
1176rel_skb:
1177 __kfree_skb(skb);
1178}
1179
1180static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1181{
1182 struct cxgbi_sock *csk;
1183 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1184 unsigned int tid = GET_TID(rpl);
1185 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1186 struct tid_info *t = lldi->tids;
1187
1188 csk = lookup_tid(t, tid);
1189 if (unlikely(!csk))
1190 pr_err("can't find connection for tid %u.\n", tid);
1191 else {
1192 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1193 "csk 0x%p,%u,0x%lx,%u.\n",
1194 csk, csk->state, csk->flags, csk->tid);
1195 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1196 rpl->seq_vld);
1197 }
1198 __kfree_skb(skb);
1199}
1200
1201static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1202{
1203 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1204 unsigned int tid = GET_TID(rpl);
1205 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1206 struct tid_info *t = lldi->tids;
1207 struct cxgbi_sock *csk;
1208
1209 csk = lookup_tid(t, tid);
1210 if (!csk)
1211 pr_err("can't find conn. for tid %u.\n", tid);
1212
1213 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1214 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1215 csk, csk->state, csk->flags, csk->tid, rpl->status);
1216
1217 if (rpl->status != CPL_ERR_NONE)
1218 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1219 csk, tid, rpl->status);
1220
1221 __kfree_skb(skb);
1222}
1223
1224static int alloc_cpls(struct cxgbi_sock *csk)
1225{
24d3f95a 1226 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1227 0, GFP_KERNEL);
7b36b6e0 1228 if (!csk->cpl_close)
1229 return -ENOMEM;
1230
24d3f95a 1231 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1232 0, GFP_KERNEL);
7b36b6e0 1233 if (!csk->cpl_abort_req)
1234 goto free_cpls;
1235
24d3f95a 1236 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1237 0, GFP_KERNEL);
7b36b6e0 1238 if (!csk->cpl_abort_rpl)
1239 goto free_cpls;
1240 return 0;
1241
1242free_cpls:
1243 cxgbi_sock_free_cpl_skbs(csk);
1244 return -ENOMEM;
1245}
1246
1247static inline void l2t_put(struct cxgbi_sock *csk)
1248{
1249 if (csk->l2t) {
1250 cxgb4_l2t_release(csk->l2t);
1251 csk->l2t = NULL;
1252 cxgbi_sock_put(csk);
1253 }
1254}
1255
1256static void release_offload_resources(struct cxgbi_sock *csk)
1257{
1258 struct cxgb4_lld_info *lldi;
1259
1260 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1261 "csk 0x%p,%u,0x%lx,%u.\n",
1262 csk, csk->state, csk->flags, csk->tid);
1263
1264 cxgbi_sock_free_cpl_skbs(csk);
1265 if (csk->wr_cred != csk->wr_max_cred) {
1266 cxgbi_sock_purge_wr_queue(csk);
1267 cxgbi_sock_reset_wr_list(csk);
1268 }
1269
1270 l2t_put(csk);
1271 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1272 free_atid(csk);
1273 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1274 lldi = cxgbi_cdev_priv(csk->cdev);
1275 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1276 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1277 cxgbi_sock_put(csk);
1278 }
1279 csk->dst = NULL;
1280 csk->cdev = NULL;
1281}
1282
1283static int init_act_open(struct cxgbi_sock *csk)
1284{
1285 struct cxgbi_device *cdev = csk->cdev;
1286 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1287 struct net_device *ndev = cdev->ports[csk->port_id];
7b36b6e0 1288 struct sk_buff *skb = NULL;
759a0cc5
AB		 1289 struct neighbour *n = NULL;
1290 void *daddr;
7b36b6e0 1291 unsigned int step;
759a0cc5
AB		 1292 unsigned int size, size6;
1293 int t4 = is_t4(lldi->adapter_type);
7b36b6e0 1294
1295 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1296 "csk 0x%p,%u,0x%lx,%u.\n",
1297 csk, csk->state, csk->flags, csk->tid);
1298
759a0cc5
AB		 1299 if (csk->csk_family == AF_INET)
1300 daddr = &csk->daddr.sin_addr.s_addr;
e81fbf6c
AB		 1301#if IS_ENABLED(CONFIG_IPV6)
1302 else if (csk->csk_family == AF_INET6)
759a0cc5 1303 daddr = &csk->daddr6.sin6_addr;
e81fbf6c
AB		 1304#endif
1305 else {
1306 pr_err("address family 0x%x not supported\n", csk->csk_family);
1307 goto rel_resource;
1308 }
759a0cc5
AB		 1309
1310 n = dst_neigh_lookup(csk->dst, daddr);
1311
1312 if (!n) {
1313 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1314 goto rel_resource;
1315 }
1316
7b36b6e0 1317 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1318 if (csk->atid < 0) {
1319 pr_err("%s, NO atid available.\n", ndev->name);
1320 return -EINVAL;
1321 }
1322 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1323 cxgbi_sock_get(csk);
1324
51e059bd 1325 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
7b36b6e0 1326 if (!csk->l2t) {
1327 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1328 goto rel_resource;
1329 }
1330 cxgbi_sock_get(csk);
1331
759a0cc5
AB		 1332 if (t4) {
1333 size = sizeof(struct cpl_act_open_req);
1334 size6 = sizeof(struct cpl_act_open_req6);
1335 } else {
1336 size = sizeof(struct cpl_t5_act_open_req);
1337 size6 = sizeof(struct cpl_t5_act_open_req6);
1338 }
1339
1340 if (csk->csk_family == AF_INET)
1341 skb = alloc_wr(size, 0, GFP_NOIO);
f42bb57c 1342#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1343 else
1344 skb = alloc_wr(size6, 0, GFP_NOIO);
f42bb57c 1345#endif
759a0cc5 1346
7b36b6e0 1347 if (!skb)
1348 goto rel_resource;
1349 skb->sk = (struct sock *)csk;
1350 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1351
1352 if (!csk->mtu)
1353 csk->mtu = dst_mtu(csk->dst);
1354 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1355 csk->tx_chan = cxgb4_port_chan(ndev);
1356 /* SMT two entries per row */
1357 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1358 step = lldi->ntxq / lldi->nchan;
1359 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1360 step = lldi->nrxq / lldi->nchan;
1361 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
759a0cc5
AB		 1362 csk->wr_cred = lldi->wr_cred -
1363 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1364 csk->wr_max_cred = csk->wr_cred;
7b36b6e0 1365 csk->wr_una_cred = 0;
1366 cxgbi_sock_reset_wr_list(csk);
1367 csk->err = 0;
7b36b6e0 1368
759a0cc5
AB		 1369 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1370 (&csk->saddr), (&csk->daddr), csk, csk->state,
1371 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1372 csk->mtu, csk->mss_idx, csk->smac_idx);
1373
1374 /* must wait for either a act_open_rpl or act_open_establish */
1375 try_module_get(THIS_MODULE);
7b36b6e0 1376 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
759a0cc5
AB		 1377 if (csk->csk_family == AF_INET)
1378 send_act_open_req(csk, skb, csk->l2t);
f42bb57c 1379#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1380 else
1381 send_act_open_req6(csk, skb, csk->l2t);
f42bb57c 1382#endif
c4737377 1383 neigh_release(n);
759a0cc5 1384
7b36b6e0 1385 return 0;
1386
1387rel_resource:
c4737377
DM		 1388 if (n)
1389 neigh_release(n);
7b36b6e0 1390 if (skb)
1391 __kfree_skb(skb);
1392 return -EINVAL;
1393}
1394
1395cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1396 [CPL_ACT_ESTABLISH] = do_act_establish,
1397 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1398 [CPL_PEER_CLOSE] = do_peer_close,
1399 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1400 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1401 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1402 [CPL_FW4_ACK] = do_fw4_ack,
1403 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
3bd3e8bf 1404 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
7b36b6e0 1405 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1406 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
3bd3e8bf 1407 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
7b36b6e0 1408};
1409
1410int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1411{
1412 int rc;
1413
1414 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1415 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1416
1417 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1418 cxgb4i_max_connect);
1419 if (rc < 0)
1420 return rc;
1421
1422 cdev->csk_release_offload_resources = release_offload_resources;
1423 cdev->csk_push_tx_frames = push_tx_frames;
1424 cdev->csk_send_abort_req = send_abort_req;
1425 cdev->csk_send_close_req = send_close_req;
1426 cdev->csk_send_rx_credits = send_rx_credits;
1427 cdev->csk_alloc_cpls = alloc_cpls;
1428 cdev->csk_init_act_open = init_act_open;
1429
1430 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1431 return 0;
1432}
1433
1434/*
1435 * functions to program the pagepod in h/w
1436 */
e27d6169 1437#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
3bd3e8bf
KX		 1438static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1439 struct ulp_mem_io *req,
e27d6169 1440 unsigned int wr_len, unsigned int dlen,
1441 unsigned int pm_addr)
7b36b6e0 1442{
e27d6169 1443 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
7b36b6e0 1444
1445 INIT_ULPTX_WR(req, wr_len, 0, 0);
3bd3e8bf
KX		 1446 if (is_t4(lldi->adapter_type))
1447 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1448 (ULP_MEMIO_ORDER(1)));
1449 else
1450 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1451 (V_T5_ULP_MEMIO_IMM(1)));
7b36b6e0 1452 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1453 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1454 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
e27d6169 1455
1456 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1457 idata->len = htonl(dlen);
7b36b6e0 1458}
1459
e27d6169 1460static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
7b36b6e0 1461 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1462 unsigned int npods,
1463 struct cxgbi_gather_list *gl,
1464 unsigned int gl_pidx)
1465{
1466 struct cxgbi_ddp_info *ddp = cdev->ddp;
3bd3e8bf 1467 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
7b36b6e0 1468 struct sk_buff *skb;
1469 struct ulp_mem_io *req;
e27d6169 1470 struct ulptx_idata *idata;
7b36b6e0 1471 struct cxgbi_pagepod *ppod;
e27d6169 1472 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1473 unsigned int dlen = PPOD_SIZE * npods;
1474 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1475 sizeof(struct ulptx_idata) + dlen, 16);
7b36b6e0 1476 unsigned int i;
1477
e27d6169 1478 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
7b36b6e0 1479 if (!skb) {
1480 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1481 cdev, idx, npods);
1482 return -ENOMEM;
1483 }
1484 req = (struct ulp_mem_io *)skb->head;
1485 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1486
3bd3e8bf 1487 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
e27d6169 1488 idata = (struct ulptx_idata *)(req + 1);
1489 ppod = (struct cxgbi_pagepod *)(idata + 1);
7b36b6e0 1490
1491 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1492 if (!hdr && !gl)
1493 cxgbi_ddp_ppod_clear(ppod);
1494 else
1495 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1496 }
1497
1498 cxgb4_ofld_send(cdev->ports[port_id], skb);
1499 return 0;
1500}
1501
1502static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1503 unsigned int idx, unsigned int npods,
1504 struct cxgbi_gather_list *gl)
1505{
1506 unsigned int i, cnt;
1507 int err = 0;
1508
1509 for (i = 0; i < npods; i += cnt, idx += cnt) {
1510 cnt = npods - i;
e27d6169 1511 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1512 cnt = ULPMEM_IDATA_MAX_NPPODS;
1513 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
7b36b6e0 1514 idx, cnt, gl, 4 * i);
1515 if (err < 0)
1516 break;
1517 }
1518 return err;
1519}
1520
1521static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1522 unsigned int idx, unsigned int npods)
1523{
1524 unsigned int i, cnt;
1525 int err;
1526
1527 for (i = 0; i < npods; i += cnt, idx += cnt) {
1528 cnt = npods - i;
e27d6169 1529 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1530 cnt = ULPMEM_IDATA_MAX_NPPODS;
1531 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
7b36b6e0 1532 idx, cnt, NULL, 0);
1533 if (err < 0)
1534 break;
1535 }
1536}
1537
1538static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1539 int pg_idx, bool reply)
1540{
1541 struct sk_buff *skb;
1542 struct cpl_set_tcb_field *req;
7b36b6e0 1543
e27d6169 1544 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1545 return 0;
1546
24d3f95a 1547 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1548 if (!skb)
1549 return -ENOMEM;
1550
e27d6169 1551 /* set up ulp page size */
7b36b6e0 1552 req = (struct cpl_set_tcb_field *)skb->head;
1553 INIT_TP_WR(req, csk->tid);
1554 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1555 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1556 req->word_cookie = htons(0);
1557 req->mask = cpu_to_be64(0x3 << 8);
1558 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1559 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1560
1561 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1562 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1563
1564 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1565 return 0;
1566}
1567
1568static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1569 int hcrc, int dcrc, int reply)
1570{
1571 struct sk_buff *skb;
1572 struct cpl_set_tcb_field *req;
7b36b6e0 1573
e27d6169 1574 if (!hcrc && !dcrc)
1575 return 0;
7b36b6e0 1576
24d3f95a 1577 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1578 if (!skb)
1579 return -ENOMEM;
1580
1581 csk->hcrc_len = (hcrc ? 4 : 0);
1582 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1583 /* set up ulp submode */
7b36b6e0 1584 req = (struct cpl_set_tcb_field *)skb->head;
1585 INIT_TP_WR(req, tid);
1586 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1587 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1588 req->word_cookie = htons(0);
1589 req->mask = cpu_to_be64(0x3 << 4);
1590 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1591 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1592 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1593
1594 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1595 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1596
1597 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1598 return 0;
1599}
1600
1601static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1602{
1603 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1604 struct cxgbi_ddp_info *ddp = cdev->ddp;
1605 unsigned int tagmask, pgsz_factor[4];
1606 int err;
1607
1608 if (ddp) {
1609 kref_get(&ddp->refcnt);
1610 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1611 cdev, cdev->ddp);
1612 return -EALREADY;
1613 }
1614
1615 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1616 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1617 lldi->iscsi_iolen, lldi->iscsi_iolen);
1618 if (err < 0)
1619 return err;
1620
1621 ddp = cdev->ddp;
1622
1623 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1624 cxgbi_ddp_page_size_factor(pgsz_factor);
1625 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1626
7b36b6e0 1627 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1628 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1629 cdev->csk_ddp_set = ddp_set_map;
1630 cdev->csk_ddp_clear = ddp_clear_map;
1631
1632 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1633 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1634 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1635 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1636 " %u/%u.\n",
1637 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1638 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1639 ddp->max_rxsz, lldi->iscsi_iolen);
1640 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1641 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1642 ddp->max_rxsz);
1643 return 0;
1644}
1645
1646static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1647{
1648 struct cxgbi_device *cdev;
1649 struct port_info *pi;
1650 int i, rc;
1651
1652 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1653 if (!cdev) {
1654 pr_info("t4 device 0x%p, register failed.\n", lldi);
1655 return NULL;
1656 }
1657 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1658 cdev, lldi->adapter_type, lldi->nports,
1659 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1660 lldi->nrxq, lldi->wr_cred);
1661 for (i = 0; i < lldi->nrxq; i++)
1662 log_debug(1 << CXGBI_DBG_DEV,
1663 "t4 0x%p, rxq id #%d: %u.\n",
1664 cdev, i, lldi->rxq_ids[i]);
1665
1666 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1667 cdev->flags = CXGBI_FLAG_DEV_T4;
1668 cdev->pdev = lldi->pdev;
1669 cdev->ports = lldi->ports;
1670 cdev->nports = lldi->nports;
1671 cdev->mtus = lldi->mtus;
1672 cdev->nmtus = NMTUS;
1673 cdev->snd_win = cxgb4i_snd_win;
1674 cdev->rcv_win = cxgb4i_rcv_win;
1675 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1676 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1677 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1678 cdev->itp = &cxgb4i_iscsi_transport;
1679
e27d6169 1680 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1681 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1682 cdev, lldi->ports[0]->name, cdev->pfvf);
1683
7b36b6e0 1684 rc = cxgb4i_ddp_init(cdev);
1685 if (rc) {
1686 pr_info("t4 0x%p ddp init failed.\n", cdev);
1687 goto err_out;
1688 }
1689 rc = cxgb4i_ofld_init(cdev);
1690 if (rc) {
1691 pr_info("t4 0x%p ofld init failed.\n", cdev);
1692 goto err_out;
1693 }
1694
1695 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1696 &cxgb4i_host_template, cxgb4i_stt);
1697 if (rc)
1698 goto err_out;
1699
1700 for (i = 0; i < cdev->nports; i++) {
1701 pi = netdev_priv(lldi->ports[i]);
1702 cdev->hbas[i]->port_id = pi->port_id;
1703 }
1704 return cdev;
1705
1706err_out:
1707 cxgbi_device_unregister(cdev);
1708 return ERR_PTR(-ENOMEM);
1709}
1710
1711#define RX_PULL_LEN 128
1712static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1713 const struct pkt_gl *pgl)
1714{
1715 const struct cpl_act_establish *rpl;
1716 struct sk_buff *skb;
1717 unsigned int opc;
1718 struct cxgbi_device *cdev = handle;
1719
1720 if (pgl == NULL) {
1721 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1722
24d3f95a 1723 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 1724 if (!skb)
1725 goto nomem;
1726 skb_copy_to_linear_data(skb, &rsp[1], len);
1727 } else {
1728 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1729 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1730 pgl->va, be64_to_cpu(*rsp),
1731 be64_to_cpu(*(u64 *)pgl->va),
1732 pgl->tot_len);
1733 return 0;
1734 }
1735 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1736 if (unlikely(!skb))
1737 goto nomem;
1738 }
1739
1740 rpl = (struct cpl_act_establish *)skb->data;
1741 opc = rpl->ot.opcode;
1742 log_debug(1 << CXGBI_DBG_TOE,
1743 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1744 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1745 if (cxgb4i_cplhandlers[opc])
1746 cxgb4i_cplhandlers[opc](cdev, skb);
1747 else {
1748 pr_err("No handler for opcode 0x%x.\n", opc);
1749 __kfree_skb(skb);
1750 }
1751 return 0;
1752nomem:
1753 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1754 return 1;
1755}
1756
1757static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1758{
1759 struct cxgbi_device *cdev = handle;
1760
1761 switch (state) {
1762 case CXGB4_STATE_UP:
1763 pr_info("cdev 0x%p, UP.\n", cdev);
7b36b6e0 1764 break;
1765 case CXGB4_STATE_START_RECOVERY:
1766 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1767 /* close all connections */
1768 break;
1769 case CXGB4_STATE_DOWN:
1770 pr_info("cdev 0x%p, DOWN.\n", cdev);
1771 break;
1772 case CXGB4_STATE_DETACH:
1773 pr_info("cdev 0x%p, DETACH.\n", cdev);
c3b331a3 1774 cxgbi_device_unregister(cdev);
7b36b6e0 1775 break;
1776 default:
1777 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1778 break;
1779 }
1780 return 0;
1781}
1782
1783static int __init cxgb4i_init_module(void)
1784{
1785 int rc;
1786
1787 printk(KERN_INFO "%s", version);
1788
1789 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1790 if (rc < 0)
1791 return rc;
1792 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
759a0cc5 1793
7b36b6e0 1794 return 0;
1795}
1796
1797static void __exit cxgb4i_exit_module(void)
1798{
1799 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1800 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1801 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1802}
1803
1804module_init(cxgb4i_init_module);
1805module_exit(cxgb4i_exit_module);
Linux kernel - Deliverables
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