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cxgbi: add maintainer for cxgb3i/cxgb4i
[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
7b36b6e0 831 if (status && status != CPL_ERR_TCAM_FULL &&
832 status != CPL_ERR_CONN_EXIST &&
833 status != CPL_ERR_ARP_MISS)
834 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
835
836 cxgbi_sock_get(csk);
837 spin_lock_bh(&csk->lock);
838
839 if (status == CPL_ERR_CONN_EXIST &&
840 csk->retry_timer.function != csk_act_open_retry_timer) {
841 csk->retry_timer.function = csk_act_open_retry_timer;
842 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
843 } else
844 cxgbi_sock_fail_act_open(csk,
845 act_open_rpl_status_to_errno(status));
846
847 spin_unlock_bh(&csk->lock);
848 cxgbi_sock_put(csk);
849rel_skb:
850 __kfree_skb(skb);
851}
852
853static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
854{
855 struct cxgbi_sock *csk;
856 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
857 unsigned int tid = GET_TID(req);
858 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
859 struct tid_info *t = lldi->tids;
860
861 csk = lookup_tid(t, tid);
862 if (unlikely(!csk)) {
863 pr_err("can't find connection for tid %u.\n", tid);
864 goto rel_skb;
865 }
759a0cc5
AB		 866 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
867 (&csk->saddr), (&csk->daddr),
868 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 869 cxgbi_sock_rcv_peer_close(csk);
870rel_skb:
871 __kfree_skb(skb);
872}
873
874static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
875{
876 struct cxgbi_sock *csk;
877 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
878 unsigned int tid = GET_TID(rpl);
879 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
880 struct tid_info *t = lldi->tids;
881
882 csk = lookup_tid(t, tid);
883 if (unlikely(!csk)) {
884 pr_err("can't find connection for tid %u.\n", tid);
885 goto rel_skb;
886 }
759a0cc5
AB		 887 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
888 (&csk->saddr), (&csk->daddr),
889 csk, csk->state, csk->flags, csk->tid);
7b36b6e0 890 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
891rel_skb:
892 __kfree_skb(skb);
893}
894
895static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
896 int *need_rst)
897{
898 switch (abort_reason) {
899 case CPL_ERR_BAD_SYN: /* fall through */
900 case CPL_ERR_CONN_RESET:
901 return csk->state > CTP_ESTABLISHED ?
902 -EPIPE : -ECONNRESET;
903 case CPL_ERR_XMIT_TIMEDOUT:
904 case CPL_ERR_PERSIST_TIMEDOUT:
905 case CPL_ERR_FINWAIT2_TIMEDOUT:
906 case CPL_ERR_KEEPALIVE_TIMEDOUT:
907 return -ETIMEDOUT;
908 default:
909 return -EIO;
910 }
911}
912
913static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
914{
915 struct cxgbi_sock *csk;
916 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
917 unsigned int tid = GET_TID(req);
918 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
919 struct tid_info *t = lldi->tids;
920 int rst_status = CPL_ABORT_NO_RST;
921
922 csk = lookup_tid(t, tid);
923 if (unlikely(!csk)) {
924 pr_err("can't find connection for tid %u.\n", tid);
925 goto rel_skb;
926 }
927
759a0cc5
AB		 928 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
929 (&csk->saddr), (&csk->daddr),
930 csk, csk->state, csk->flags, csk->tid, req->status);
7b36b6e0 931
932 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
933 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
934 goto rel_skb;
935
936 cxgbi_sock_get(csk);
937 spin_lock_bh(&csk->lock);
938
939 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
940 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
941 cxgbi_sock_set_state(csk, CTP_ABORTING);
942 goto done;
943 }
944
945 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
946 send_abort_rpl(csk, rst_status);
947
948 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
949 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
950 cxgbi_sock_closed(csk);
951 }
952done:
953 spin_unlock_bh(&csk->lock);
954 cxgbi_sock_put(csk);
955rel_skb:
956 __kfree_skb(skb);
957}
958
959static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
960{
961 struct cxgbi_sock *csk;
962 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
963 unsigned int tid = GET_TID(rpl);
964 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
965 struct tid_info *t = lldi->tids;
966
967 csk = lookup_tid(t, tid);
968 if (!csk)
969 goto rel_skb;
970
759a0cc5
AB		 971 if (csk)
972 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
973 (&csk->saddr), (&csk->daddr), csk,
974 csk->state, csk->flags, csk->tid, rpl->status);
7b36b6e0 975
976 if (rpl->status == CPL_ERR_ABORT_FAILED)
977 goto rel_skb;
978
979 cxgbi_sock_rcv_abort_rpl(csk);
980rel_skb:
981 __kfree_skb(skb);
982}
983
984static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
985{
986 struct cxgbi_sock *csk;
987 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
988 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
989 unsigned int tid = GET_TID(cpl);
990 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
991 struct tid_info *t = lldi->tids;
7b36b6e0 992
993 csk = lookup_tid(t, tid);
994 if (unlikely(!csk)) {
995 pr_err("can't find conn. for tid %u.\n", tid);
996 goto rel_skb;
997 }
998
999 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1000 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1001 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1002 pdu_len_ddp);
1003
1004 spin_lock_bh(&csk->lock);
1005
1006 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1007 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1008 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1009 csk, csk->state, csk->flags, csk->tid);
1010 if (csk->state != CTP_ABORTING)
1011 goto abort_conn;
1012 else
1013 goto discard;
1014 }
1015
1016 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 1017 cxgbi_skcb_flags(skb) = 0;
1018
7b36b6e0 1019 skb_reset_transport_header(skb);
1020 __skb_pull(skb, sizeof(*cpl));
1021 __pskb_trim(skb, ntohs(cpl->len));
1022
1023 if (!csk->skb_ulp_lhdr) {
1024 unsigned char *bhs;
3bd3e8bf 1025 unsigned int hlen, dlen, plen;
7b36b6e0 1026
1027 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1028 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1029 csk, csk->state, csk->flags, csk->tid, skb);
1030 csk->skb_ulp_lhdr = skb;
e27d6169 1031 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 1032
e27d6169 1033 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 1034 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 1035 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 1036 csk->rcv_nxt);
1037 goto abort_conn;
1038 }
1039
e27d6169 1040 bhs = skb->data;
7b36b6e0 1041 hlen = ntohs(cpl->len);
1042 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1043
3bd3e8bf
KX		 1044 plen = ISCSI_PDU_LEN(pdu_len_ddp);
1045 if (is_t4(lldi->adapter_type))
1046 plen -= 40;
1047
1048 if ((hlen + dlen) != plen) {
7b36b6e0 1049 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1050 "mismatch %u != %u + %u, seq 0x%x.\n",
3bd3e8bf
KX		 1051 csk->tid, plen, hlen, dlen,
1052 cxgbi_skcb_tcp_seq(skb));
7b36b6e0 1053 goto abort_conn;
1054 }
1055
1056 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1057 if (dlen)
1058 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1059 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1060
1061 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1062 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1063 csk, skb, *bhs, hlen, dlen,
1064 ntohl(*((unsigned int *)(bhs + 16))),
1065 ntohl(*((unsigned int *)(bhs + 24))));
1066
1067 } else {
e27d6169 1068 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 1069
e27d6169 1070 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 1071 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1072 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1073 csk, csk->state, csk->flags, skb, lskb);
1074 }
1075
1076 __skb_queue_tail(&csk->receive_queue, skb);
1077 spin_unlock_bh(&csk->lock);
1078 return;
1079
1080abort_conn:
1081 send_abort_req(csk);
1082discard:
1083 spin_unlock_bh(&csk->lock);
1084rel_skb:
1085 __kfree_skb(skb);
1086}
1087
1088static void do_rx_data_ddp(struct cxgbi_device *cdev,
1089 struct sk_buff *skb)
1090{
1091 struct cxgbi_sock *csk;
1092 struct sk_buff *lskb;
1093 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1094 unsigned int tid = GET_TID(rpl);
1095 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1096 struct tid_info *t = lldi->tids;
1097 unsigned int status = ntohl(rpl->ddpvld);
1098
1099 csk = lookup_tid(t, tid);
1100 if (unlikely(!csk)) {
1101 pr_err("can't find connection for tid %u.\n", tid);
1102 goto rel_skb;
1103 }
1104
1105 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1106 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1107 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1108
1109 spin_lock_bh(&csk->lock);
1110
1111 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1112 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1113 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1114 csk, csk->state, csk->flags, csk->tid);
1115 if (csk->state != CTP_ABORTING)
1116 goto abort_conn;
1117 else
1118 goto discard;
1119 }
1120
1121 if (!csk->skb_ulp_lhdr) {
1122 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1123 goto abort_conn;
1124 }
1125
1126 lskb = csk->skb_ulp_lhdr;
1127 csk->skb_ulp_lhdr = NULL;
1128
7b36b6e0 1129 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1130
1131 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1132 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1133 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1134
1135 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
e27d6169 1136 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1137 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1138 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1139 }
1140 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
e27d6169 1141 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1142 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1143 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1144 }
1145 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1146 log_debug(1 << CXGBI_DBG_PDU_RX,
1147 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1148 csk, lskb, status);
1149 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1150 }
1151 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1152 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1153 log_debug(1 << CXGBI_DBG_PDU_RX,
1154 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1155 csk, lskb, status);
1156 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1157 }
1158 log_debug(1 << CXGBI_DBG_PDU_RX,
1159 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1160 csk, lskb, cxgbi_skcb_flags(lskb));
1161
e27d6169 1162 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1163 cxgbi_conn_pdu_ready(csk);
1164 spin_unlock_bh(&csk->lock);
1165 goto rel_skb;
1166
1167abort_conn:
1168 send_abort_req(csk);
1169discard:
1170 spin_unlock_bh(&csk->lock);
1171rel_skb:
1172 __kfree_skb(skb);
1173}
1174
1175static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1176{
1177 struct cxgbi_sock *csk;
1178 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1179 unsigned int tid = GET_TID(rpl);
1180 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1181 struct tid_info *t = lldi->tids;
1182
1183 csk = lookup_tid(t, tid);
1184 if (unlikely(!csk))
1185 pr_err("can't find connection for tid %u.\n", tid);
1186 else {
1187 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1188 "csk 0x%p,%u,0x%lx,%u.\n",
1189 csk, csk->state, csk->flags, csk->tid);
1190 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1191 rpl->seq_vld);
1192 }
1193 __kfree_skb(skb);
1194}
1195
1196static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1197{
1198 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1199 unsigned int tid = GET_TID(rpl);
1200 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1201 struct tid_info *t = lldi->tids;
1202 struct cxgbi_sock *csk;
1203
1204 csk = lookup_tid(t, tid);
1205 if (!csk)
1206 pr_err("can't find conn. for tid %u.\n", tid);
1207
1208 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1209 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1210 csk, csk->state, csk->flags, csk->tid, rpl->status);
1211
1212 if (rpl->status != CPL_ERR_NONE)
1213 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1214 csk, tid, rpl->status);
1215
1216 __kfree_skb(skb);
1217}
1218
1219static int alloc_cpls(struct cxgbi_sock *csk)
1220{
24d3f95a 1221 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1222 0, GFP_KERNEL);
7b36b6e0 1223 if (!csk->cpl_close)
1224 return -ENOMEM;
1225
24d3f95a 1226 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1227 0, GFP_KERNEL);
7b36b6e0 1228 if (!csk->cpl_abort_req)
1229 goto free_cpls;
1230
24d3f95a 1231 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1232 0, GFP_KERNEL);
7b36b6e0 1233 if (!csk->cpl_abort_rpl)
1234 goto free_cpls;
1235 return 0;
1236
1237free_cpls:
1238 cxgbi_sock_free_cpl_skbs(csk);
1239 return -ENOMEM;
1240}
1241
1242static inline void l2t_put(struct cxgbi_sock *csk)
1243{
1244 if (csk->l2t) {
1245 cxgb4_l2t_release(csk->l2t);
1246 csk->l2t = NULL;
1247 cxgbi_sock_put(csk);
1248 }
1249}
1250
1251static void release_offload_resources(struct cxgbi_sock *csk)
1252{
1253 struct cxgb4_lld_info *lldi;
1254
1255 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1256 "csk 0x%p,%u,0x%lx,%u.\n",
1257 csk, csk->state, csk->flags, csk->tid);
1258
1259 cxgbi_sock_free_cpl_skbs(csk);
1260 if (csk->wr_cred != csk->wr_max_cred) {
1261 cxgbi_sock_purge_wr_queue(csk);
1262 cxgbi_sock_reset_wr_list(csk);
1263 }
1264
1265 l2t_put(csk);
1266 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1267 free_atid(csk);
1268 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1269 lldi = cxgbi_cdev_priv(csk->cdev);
1270 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1271 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1272 cxgbi_sock_put(csk);
1273 }
1274 csk->dst = NULL;
1275 csk->cdev = NULL;
1276}
1277
1278static int init_act_open(struct cxgbi_sock *csk)
1279{
1280 struct cxgbi_device *cdev = csk->cdev;
1281 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1282 struct net_device *ndev = cdev->ports[csk->port_id];
7b36b6e0 1283 struct sk_buff *skb = NULL;
759a0cc5
AB		 1284 struct neighbour *n = NULL;
1285 void *daddr;
7b36b6e0 1286 unsigned int step;
759a0cc5
AB		 1287 unsigned int size, size6;
1288 int t4 = is_t4(lldi->adapter_type);
7b36b6e0 1289
1290 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1291 "csk 0x%p,%u,0x%lx,%u.\n",
1292 csk, csk->state, csk->flags, csk->tid);
1293
759a0cc5
AB		 1294 if (csk->csk_family == AF_INET)
1295 daddr = &csk->daddr.sin_addr.s_addr;
e81fbf6c
AB		 1296#if IS_ENABLED(CONFIG_IPV6)
1297 else if (csk->csk_family == AF_INET6)
759a0cc5 1298 daddr = &csk->daddr6.sin6_addr;
e81fbf6c
AB		 1299#endif
1300 else {
1301 pr_err("address family 0x%x not supported\n", csk->csk_family);
1302 goto rel_resource;
1303 }
759a0cc5
AB		 1304
1305 n = dst_neigh_lookup(csk->dst, daddr);
1306
1307 if (!n) {
1308 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1309 goto rel_resource;
1310 }
1311
7b36b6e0 1312 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1313 if (csk->atid < 0) {
1314 pr_err("%s, NO atid available.\n", ndev->name);
1315 return -EINVAL;
1316 }
1317 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1318 cxgbi_sock_get(csk);
1319
51e059bd 1320 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
7b36b6e0 1321 if (!csk->l2t) {
1322 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1323 goto rel_resource;
1324 }
1325 cxgbi_sock_get(csk);
1326
759a0cc5
AB		 1327 if (t4) {
1328 size = sizeof(struct cpl_act_open_req);
1329 size6 = sizeof(struct cpl_act_open_req6);
1330 } else {
1331 size = sizeof(struct cpl_t5_act_open_req);
1332 size6 = sizeof(struct cpl_t5_act_open_req6);
1333 }
1334
1335 if (csk->csk_family == AF_INET)
1336 skb = alloc_wr(size, 0, GFP_NOIO);
f42bb57c 1337#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1338 else
1339 skb = alloc_wr(size6, 0, GFP_NOIO);
f42bb57c 1340#endif
759a0cc5 1341
7b36b6e0 1342 if (!skb)
1343 goto rel_resource;
1344 skb->sk = (struct sock *)csk;
1345 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1346
1347 if (!csk->mtu)
1348 csk->mtu = dst_mtu(csk->dst);
1349 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1350 csk->tx_chan = cxgb4_port_chan(ndev);
1351 /* SMT two entries per row */
1352 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1353 step = lldi->ntxq / lldi->nchan;
1354 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1355 step = lldi->nrxq / lldi->nchan;
1356 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
759a0cc5
AB		 1357 csk->wr_cred = lldi->wr_cred -
1358 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1359 csk->wr_max_cred = csk->wr_cred;
7b36b6e0 1360 csk->wr_una_cred = 0;
1361 cxgbi_sock_reset_wr_list(csk);
1362 csk->err = 0;
7b36b6e0 1363
759a0cc5
AB		 1364 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1365 (&csk->saddr), (&csk->daddr), csk, csk->state,
1366 csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1367 csk->mtu, csk->mss_idx, csk->smac_idx);
1368
1369 /* must wait for either a act_open_rpl or act_open_establish */
1370 try_module_get(THIS_MODULE);
7b36b6e0 1371 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
759a0cc5
AB		 1372 if (csk->csk_family == AF_INET)
1373 send_act_open_req(csk, skb, csk->l2t);
f42bb57c 1374#if IS_ENABLED(CONFIG_IPV6)
759a0cc5
AB		 1375 else
1376 send_act_open_req6(csk, skb, csk->l2t);
f42bb57c 1377#endif
c4737377 1378 neigh_release(n);
759a0cc5 1379
7b36b6e0 1380 return 0;
1381
1382rel_resource:
c4737377
DM		 1383 if (n)
1384 neigh_release(n);
7b36b6e0 1385 if (skb)
1386 __kfree_skb(skb);
1387 return -EINVAL;
1388}
1389
1390cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1391 [CPL_ACT_ESTABLISH] = do_act_establish,
1392 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1393 [CPL_PEER_CLOSE] = do_peer_close,
1394 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1395 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1396 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1397 [CPL_FW4_ACK] = do_fw4_ack,
1398 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
3bd3e8bf 1399 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
7b36b6e0 1400 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1401 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
3bd3e8bf 1402 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
7b36b6e0 1403};
1404
1405int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1406{
1407 int rc;
1408
1409 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1410 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1411
1412 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1413 cxgb4i_max_connect);
1414 if (rc < 0)
1415 return rc;
1416
1417 cdev->csk_release_offload_resources = release_offload_resources;
1418 cdev->csk_push_tx_frames = push_tx_frames;
1419 cdev->csk_send_abort_req = send_abort_req;
1420 cdev->csk_send_close_req = send_close_req;
1421 cdev->csk_send_rx_credits = send_rx_credits;
1422 cdev->csk_alloc_cpls = alloc_cpls;
1423 cdev->csk_init_act_open = init_act_open;
1424
1425 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1426 return 0;
1427}
1428
1429/*
1430 * functions to program the pagepod in h/w
1431 */
e27d6169 1432#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
3bd3e8bf
KX		 1433static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1434 struct ulp_mem_io *req,
e27d6169 1435 unsigned int wr_len, unsigned int dlen,
1436 unsigned int pm_addr)
7b36b6e0 1437{
e27d6169 1438 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
7b36b6e0 1439
1440 INIT_ULPTX_WR(req, wr_len, 0, 0);
3bd3e8bf
KX		 1441 if (is_t4(lldi->adapter_type))
1442 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1443 (ULP_MEMIO_ORDER(1)));
1444 else
1445 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1446 (V_T5_ULP_MEMIO_IMM(1)));
7b36b6e0 1447 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1448 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1449 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
e27d6169 1450
1451 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1452 idata->len = htonl(dlen);
7b36b6e0 1453}
1454
e27d6169 1455static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
7b36b6e0 1456 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1457 unsigned int npods,
1458 struct cxgbi_gather_list *gl,
1459 unsigned int gl_pidx)
1460{
1461 struct cxgbi_ddp_info *ddp = cdev->ddp;
3bd3e8bf 1462 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
7b36b6e0 1463 struct sk_buff *skb;
1464 struct ulp_mem_io *req;
e27d6169 1465 struct ulptx_idata *idata;
7b36b6e0 1466 struct cxgbi_pagepod *ppod;
e27d6169 1467 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1468 unsigned int dlen = PPOD_SIZE * npods;
1469 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1470 sizeof(struct ulptx_idata) + dlen, 16);
7b36b6e0 1471 unsigned int i;
1472
e27d6169 1473 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
7b36b6e0 1474 if (!skb) {
1475 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1476 cdev, idx, npods);
1477 return -ENOMEM;
1478 }
1479 req = (struct ulp_mem_io *)skb->head;
1480 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1481
3bd3e8bf 1482 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
e27d6169 1483 idata = (struct ulptx_idata *)(req + 1);
1484 ppod = (struct cxgbi_pagepod *)(idata + 1);
7b36b6e0 1485
1486 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1487 if (!hdr && !gl)
1488 cxgbi_ddp_ppod_clear(ppod);
1489 else
1490 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1491 }
1492
1493 cxgb4_ofld_send(cdev->ports[port_id], skb);
1494 return 0;
1495}
1496
1497static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1498 unsigned int idx, unsigned int npods,
1499 struct cxgbi_gather_list *gl)
1500{
1501 unsigned int i, cnt;
1502 int err = 0;
1503
1504 for (i = 0; i < npods; i += cnt, idx += cnt) {
1505 cnt = npods - i;
e27d6169 1506 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1507 cnt = ULPMEM_IDATA_MAX_NPPODS;
1508 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
7b36b6e0 1509 idx, cnt, gl, 4 * i);
1510 if (err < 0)
1511 break;
1512 }
1513 return err;
1514}
1515
1516static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1517 unsigned int idx, unsigned int npods)
1518{
1519 unsigned int i, cnt;
1520 int err;
1521
1522 for (i = 0; i < npods; i += cnt, idx += cnt) {
1523 cnt = npods - i;
e27d6169 1524 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1525 cnt = ULPMEM_IDATA_MAX_NPPODS;
1526 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
7b36b6e0 1527 idx, cnt, NULL, 0);
1528 if (err < 0)
1529 break;
1530 }
1531}
1532
1533static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1534 int pg_idx, bool reply)
1535{
1536 struct sk_buff *skb;
1537 struct cpl_set_tcb_field *req;
7b36b6e0 1538
e27d6169 1539 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1540 return 0;
1541
24d3f95a 1542 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1543 if (!skb)
1544 return -ENOMEM;
1545
e27d6169 1546 /* set up ulp page size */
7b36b6e0 1547 req = (struct cpl_set_tcb_field *)skb->head;
1548 INIT_TP_WR(req, csk->tid);
1549 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1550 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1551 req->word_cookie = htons(0);
1552 req->mask = cpu_to_be64(0x3 << 8);
1553 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1554 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1555
1556 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1557 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1558
1559 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1560 return 0;
1561}
1562
1563static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1564 int hcrc, int dcrc, int reply)
1565{
1566 struct sk_buff *skb;
1567 struct cpl_set_tcb_field *req;
7b36b6e0 1568
e27d6169 1569 if (!hcrc && !dcrc)
1570 return 0;
7b36b6e0 1571
24d3f95a 1572 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1573 if (!skb)
1574 return -ENOMEM;
1575
1576 csk->hcrc_len = (hcrc ? 4 : 0);
1577 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1578 /* set up ulp submode */
7b36b6e0 1579 req = (struct cpl_set_tcb_field *)skb->head;
1580 INIT_TP_WR(req, tid);
1581 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1582 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1583 req->word_cookie = htons(0);
1584 req->mask = cpu_to_be64(0x3 << 4);
1585 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1586 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1587 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1588
1589 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1590 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1591
1592 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1593 return 0;
1594}
1595
1596static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1597{
1598 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1599 struct cxgbi_ddp_info *ddp = cdev->ddp;
1600 unsigned int tagmask, pgsz_factor[4];
1601 int err;
1602
1603 if (ddp) {
1604 kref_get(&ddp->refcnt);
1605 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1606 cdev, cdev->ddp);
1607 return -EALREADY;
1608 }
1609
1610 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1611 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1612 lldi->iscsi_iolen, lldi->iscsi_iolen);
1613 if (err < 0)
1614 return err;
1615
1616 ddp = cdev->ddp;
1617
1618 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1619 cxgbi_ddp_page_size_factor(pgsz_factor);
1620 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1621
7b36b6e0 1622 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1623 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1624 cdev->csk_ddp_set = ddp_set_map;
1625 cdev->csk_ddp_clear = ddp_clear_map;
1626
1627 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1628 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1629 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1630 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1631 " %u/%u.\n",
1632 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1633 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1634 ddp->max_rxsz, lldi->iscsi_iolen);
1635 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1636 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1637 ddp->max_rxsz);
1638 return 0;
1639}
1640
1641static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1642{
1643 struct cxgbi_device *cdev;
1644 struct port_info *pi;
1645 int i, rc;
1646
1647 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1648 if (!cdev) {
1649 pr_info("t4 device 0x%p, register failed.\n", lldi);
1650 return NULL;
1651 }
1652 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1653 cdev, lldi->adapter_type, lldi->nports,
1654 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1655 lldi->nrxq, lldi->wr_cred);
1656 for (i = 0; i < lldi->nrxq; i++)
1657 log_debug(1 << CXGBI_DBG_DEV,
1658 "t4 0x%p, rxq id #%d: %u.\n",
1659 cdev, i, lldi->rxq_ids[i]);
1660
1661 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1662 cdev->flags = CXGBI_FLAG_DEV_T4;
1663 cdev->pdev = lldi->pdev;
1664 cdev->ports = lldi->ports;
1665 cdev->nports = lldi->nports;
1666 cdev->mtus = lldi->mtus;
1667 cdev->nmtus = NMTUS;
1668 cdev->snd_win = cxgb4i_snd_win;
1669 cdev->rcv_win = cxgb4i_rcv_win;
1670 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1671 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1672 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1673 cdev->itp = &cxgb4i_iscsi_transport;
1674
e27d6169 1675 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1676 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1677 cdev, lldi->ports[0]->name, cdev->pfvf);
1678
7b36b6e0 1679 rc = cxgb4i_ddp_init(cdev);
1680 if (rc) {
1681 pr_info("t4 0x%p ddp init failed.\n", cdev);
1682 goto err_out;
1683 }
1684 rc = cxgb4i_ofld_init(cdev);
1685 if (rc) {
1686 pr_info("t4 0x%p ofld init failed.\n", cdev);
1687 goto err_out;
1688 }
1689
1690 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1691 &cxgb4i_host_template, cxgb4i_stt);
1692 if (rc)
1693 goto err_out;
1694
1695 for (i = 0; i < cdev->nports; i++) {
1696 pi = netdev_priv(lldi->ports[i]);
1697 cdev->hbas[i]->port_id = pi->port_id;
1698 }
1699 return cdev;
1700
1701err_out:
1702 cxgbi_device_unregister(cdev);
1703 return ERR_PTR(-ENOMEM);
1704}
1705
1706#define RX_PULL_LEN 128
1707static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1708 const struct pkt_gl *pgl)
1709{
1710 const struct cpl_act_establish *rpl;
1711 struct sk_buff *skb;
1712 unsigned int opc;
1713 struct cxgbi_device *cdev = handle;
1714
1715 if (pgl == NULL) {
1716 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1717
24d3f95a 1718 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 1719 if (!skb)
1720 goto nomem;
1721 skb_copy_to_linear_data(skb, &rsp[1], len);
1722 } else {
1723 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1724 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1725 pgl->va, be64_to_cpu(*rsp),
1726 be64_to_cpu(*(u64 *)pgl->va),
1727 pgl->tot_len);
1728 return 0;
1729 }
1730 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1731 if (unlikely(!skb))
1732 goto nomem;
1733 }
1734
1735 rpl = (struct cpl_act_establish *)skb->data;
1736 opc = rpl->ot.opcode;
1737 log_debug(1 << CXGBI_DBG_TOE,
1738 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1739 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1740 if (cxgb4i_cplhandlers[opc])
1741 cxgb4i_cplhandlers[opc](cdev, skb);
1742 else {
1743 pr_err("No handler for opcode 0x%x.\n", opc);
1744 __kfree_skb(skb);
1745 }
1746 return 0;
1747nomem:
1748 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1749 return 1;
1750}
1751
1752static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1753{
1754 struct cxgbi_device *cdev = handle;
1755
1756 switch (state) {
1757 case CXGB4_STATE_UP:
1758 pr_info("cdev 0x%p, UP.\n", cdev);
7b36b6e0 1759 break;
1760 case CXGB4_STATE_START_RECOVERY:
1761 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1762 /* close all connections */
1763 break;
1764 case CXGB4_STATE_DOWN:
1765 pr_info("cdev 0x%p, DOWN.\n", cdev);
1766 break;
1767 case CXGB4_STATE_DETACH:
1768 pr_info("cdev 0x%p, DETACH.\n", cdev);
c3b331a3 1769 cxgbi_device_unregister(cdev);
7b36b6e0 1770 break;
1771 default:
1772 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1773 break;
1774 }
1775 return 0;
1776}
1777
1778static int __init cxgb4i_init_module(void)
1779{
1780 int rc;
1781
1782 printk(KERN_INFO "%s", version);
1783
1784 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1785 if (rc < 0)
1786 return rc;
1787 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
759a0cc5 1788
7b36b6e0 1789 return 0;
1790}
1791
1792static void __exit cxgb4i_exit_module(void)
1793{
1794 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1795 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1796 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1797}
1798
1799module_init(cxgb4i_init_module);
1800module_exit(cxgb4i_exit_module);
Linux kernel - Deliverables
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