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libcxgbi: Add ipv6 api to driver
[mirror_ubuntu-bionic-kernel.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>
22
3bd3e8bf 23#include "t4_regs.h"
7b36b6e0 24#include "t4_msg.h"
25#include "cxgb4.h"
26#include "cxgb4_uld.h"
27#include "t4fw_api.h"
28#include "l2t.h"
29#include "cxgb4i.h"
30
31static unsigned int dbg_level;
32
33#include "../libcxgbi.h"
34
35#define DRV_MODULE_NAME "cxgb4i"
3bd3e8bf
KX		 36#define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
37#define DRV_MODULE_VERSION "0.9.4"
7b36b6e0 38
39static char version[] =
40 DRV_MODULE_DESC " " DRV_MODULE_NAME
3bd3e8bf 41 " v" DRV_MODULE_VERSION "\n";
7b36b6e0 42
43MODULE_AUTHOR("Chelsio Communications, Inc.");
44MODULE_DESCRIPTION(DRV_MODULE_DESC);
45MODULE_VERSION(DRV_MODULE_VERSION);
46MODULE_LICENSE("GPL");
47
48module_param(dbg_level, uint, 0644);
49MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
50
51static int cxgb4i_rcv_win = 256 * 1024;
52module_param(cxgb4i_rcv_win, int, 0644);
53MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
54
55static int cxgb4i_snd_win = 128 * 1024;
56module_param(cxgb4i_snd_win, int, 0644);
57MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
58
59static int cxgb4i_rx_credit_thres = 10 * 1024;
60module_param(cxgb4i_rx_credit_thres, int, 0644);
61MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
62 "RX credits return threshold in bytes (default=10KB)");
63
64static unsigned int cxgb4i_max_connect = (8 * 1024);
65module_param(cxgb4i_max_connect, uint, 0644);
66MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
67
68static unsigned short cxgb4i_sport_base = 20000;
69module_param(cxgb4i_sport_base, ushort, 0644);
70MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
71
72typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
73
74static void *t4_uld_add(const struct cxgb4_lld_info *);
75static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
76static int t4_uld_state_change(void *, enum cxgb4_state state);
77
78static const struct cxgb4_uld_info cxgb4i_uld_info = {
79 .name = DRV_MODULE_NAME,
80 .add = t4_uld_add,
81 .rx_handler = t4_uld_rx_handler,
82 .state_change = t4_uld_state_change,
83};
84
85static struct scsi_host_template cxgb4i_host_template = {
86 .module = THIS_MODULE,
87 .name = DRV_MODULE_NAME,
88 .proc_name = DRV_MODULE_NAME,
89 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
90 .queuecommand = iscsi_queuecommand,
91 .change_queue_depth = iscsi_change_queue_depth,
92 .sg_tablesize = SG_ALL,
93 .max_sectors = 0xFFFF,
94 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
95 .eh_abort_handler = iscsi_eh_abort,
96 .eh_device_reset_handler = iscsi_eh_device_reset,
97 .eh_target_reset_handler = iscsi_eh_recover_target,
98 .target_alloc = iscsi_target_alloc,
99 .use_clustering = DISABLE_CLUSTERING,
100 .this_id = -1,
101};
102
103static struct iscsi_transport cxgb4i_iscsi_transport = {
104 .owner = THIS_MODULE,
105 .name = DRV_MODULE_NAME,
106 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
107 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
fdafd4df 108 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
3128c6c7 109 .attr_is_visible = cxgbi_attr_is_visible,
7b36b6e0 110 .get_host_param = cxgbi_get_host_param,
111 .set_host_param = cxgbi_set_host_param,
112 /* session management */
113 .create_session = cxgbi_create_session,
114 .destroy_session = cxgbi_destroy_session,
115 .get_session_param = iscsi_session_get_param,
116 /* connection management */
117 .create_conn = cxgbi_create_conn,
118 .bind_conn = cxgbi_bind_conn,
119 .destroy_conn = iscsi_tcp_conn_teardown,
120 .start_conn = iscsi_conn_start,
121 .stop_conn = iscsi_conn_stop,
c71b9b66 122 .get_conn_param = iscsi_conn_get_param,
7b36b6e0 123 .set_param = cxgbi_set_conn_param,
124 .get_stats = cxgbi_get_conn_stats,
125 /* pdu xmit req from user space */
126 .send_pdu = iscsi_conn_send_pdu,
127 /* task */
128 .init_task = iscsi_tcp_task_init,
129 .xmit_task = iscsi_tcp_task_xmit,
130 .cleanup_task = cxgbi_cleanup_task,
131 /* pdu */
132 .alloc_pdu = cxgbi_conn_alloc_pdu,
133 .init_pdu = cxgbi_conn_init_pdu,
134 .xmit_pdu = cxgbi_conn_xmit_pdu,
135 .parse_pdu_itt = cxgbi_parse_pdu_itt,
136 /* TCP connect/disconnect */
c71b9b66 137 .get_ep_param = cxgbi_get_ep_param,
7b36b6e0 138 .ep_connect = cxgbi_ep_connect,
139 .ep_poll = cxgbi_ep_poll,
140 .ep_disconnect = cxgbi_ep_disconnect,
141 /* Error recovery timeout call */
142 .session_recovery_timedout = iscsi_session_recovery_timedout,
143};
144
145static struct scsi_transport_template *cxgb4i_stt;
146
147/*
148 * CPL (Chelsio Protocol Language) defines a message passing interface between
149 * the host driver and Chelsio asic.
150 * The section below implments CPLs that related to iscsi tcp connection
151 * open/close/abort and data send/receive.
152 */
153#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
154#define RCV_BUFSIZ_MASK 0x3FFU
155#define MAX_IMM_TX_PKT_LEN 128
156
157static inline void set_queue(struct sk_buff *skb, unsigned int queue,
158 const struct cxgbi_sock *csk)
159{
160 skb->queue_mapping = queue;
161}
162
163static int push_tx_frames(struct cxgbi_sock *, int);
164
165/*
166 * is_ofld_imm - check whether a packet can be sent as immediate data
167 * @skb: the packet
168 *
169 * Returns true if a packet can be sent as an offload WR with immediate
170 * data. We currently use the same limit as for Ethernet packets.
171 */
172static inline int is_ofld_imm(const struct sk_buff *skb)
173{
174 return skb->len <= (MAX_IMM_TX_PKT_LEN -
175 sizeof(struct fw_ofld_tx_data_wr));
176}
177
178static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
179 struct l2t_entry *e)
180{
3bd3e8bf 181 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
7b36b6e0 182 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
183 unsigned long long opt0;
184 unsigned int opt2;
185 unsigned int qid_atid = ((unsigned int)csk->atid) |
186 (((unsigned int)csk->rss_qid) << 14);
187
188 opt0 = KEEP_ALIVE(1) |
189 WND_SCALE(wscale) |
190 MSS_IDX(csk->mss_idx) |
191 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
192 TX_CHAN(csk->tx_chan) |
193 SMAC_SEL(csk->smac_idx) |
194 ULP_MODE(ULP_MODE_ISCSI) |
195 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
196 opt2 = RX_CHANNEL(0) |
197 RSS_QUEUE_VALID |
3bd3e8bf 198 (1 << 20) |
7b36b6e0 199 RSS_QUEUE(csk->rss_qid);
200
3bd3e8bf
KX		 201 if (is_t4(lldi->adapter_type)) {
202 struct cpl_act_open_req *req =
203 (struct cpl_act_open_req *)skb->head;
204
3bd3e8bf
KX		 205 INIT_TP_WR(req, 0);
206 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
7b36b6e0 207 qid_atid));
3bd3e8bf
KX		 208 req->local_port = csk->saddr.sin_port;
209 req->peer_port = csk->daddr.sin_port;
210 req->local_ip = csk->saddr.sin_addr.s_addr;
211 req->peer_ip = csk->daddr.sin_addr.s_addr;
212 req->opt0 = cpu_to_be64(opt0);
ac0245ff
KX		 213 req->params = cpu_to_be32(cxgb4_select_ntuple(
214 csk->cdev->ports[csk->port_id],
215 csk->l2t));
3bd3e8bf
KX		 216 opt2 |= 1 << 22;
217 req->opt2 = cpu_to_be32(opt2);
7b36b6e0 218
3bd3e8bf
KX		 219 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
220 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
221 csk, &req->local_ip, ntohs(req->local_port),
222 &req->peer_ip, ntohs(req->peer_port),
223 csk->atid, csk->rss_qid);
224 } else {
225 struct cpl_t5_act_open_req *req =
226 (struct cpl_t5_act_open_req *)skb->head;
227
3bd3e8bf
KX		 228 INIT_TP_WR(req, 0);
229 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
230 qid_atid));
231 req->local_port = csk->saddr.sin_port;
232 req->peer_port = csk->daddr.sin_port;
233 req->local_ip = csk->saddr.sin_addr.s_addr;
234 req->peer_ip = csk->daddr.sin_addr.s_addr;
235 req->opt0 = cpu_to_be64(opt0);
ac0245ff
KX		 236 req->params = cpu_to_be64(V_FILTER_TUPLE(
237 cxgb4_select_ntuple(
238 csk->cdev->ports[csk->port_id],
239 csk->l2t)));
3bd3e8bf
KX		 240 opt2 |= 1 << 31;
241 req->opt2 = cpu_to_be32(opt2);
242
243 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
244 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
245 csk, &req->local_ip, ntohs(req->local_port),
246 &req->peer_ip, ntohs(req->peer_port),
247 csk->atid, csk->rss_qid);
248 }
249
250 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
7b36b6e0 251 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
252}
253
254static void send_close_req(struct cxgbi_sock *csk)
255{
256 struct sk_buff *skb = csk->cpl_close;
257 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
258 unsigned int tid = csk->tid;
259
260 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
261 "csk 0x%p,%u,0x%lx, tid %u.\n",
262 csk, csk->state, csk->flags, csk->tid);
263 csk->cpl_close = NULL;
264 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
265 INIT_TP_WR(req, tid);
266 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
267 req->rsvd = 0;
268
269 cxgbi_sock_skb_entail(csk, skb);
270 if (csk->state >= CTP_ESTABLISHED)
271 push_tx_frames(csk, 1);
272}
273
274static void abort_arp_failure(void *handle, struct sk_buff *skb)
275{
276 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
277 struct cpl_abort_req *req;
278
279 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
280 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
281 csk, csk->state, csk->flags, csk->tid);
282 req = (struct cpl_abort_req *)skb->data;
283 req->cmd = CPL_ABORT_NO_RST;
284 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
285}
286
287static void send_abort_req(struct cxgbi_sock *csk)
288{
289 struct cpl_abort_req *req;
290 struct sk_buff *skb = csk->cpl_abort_req;
291
292 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
293 return;
294 cxgbi_sock_set_state(csk, CTP_ABORTING);
295 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
296 cxgbi_sock_purge_write_queue(csk);
297
298 csk->cpl_abort_req = NULL;
299 req = (struct cpl_abort_req *)skb->head;
300 set_queue(skb, CPL_PRIORITY_DATA, csk);
301 req->cmd = CPL_ABORT_SEND_RST;
302 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
303 INIT_TP_WR(req, csk->tid);
304 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
305 req->rsvd0 = htonl(csk->snd_nxt);
306 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
307
308 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
309 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
310 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
311 req->rsvd1);
312
313 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
314}
315
316static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
317{
318 struct sk_buff *skb = csk->cpl_abort_rpl;
319 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
320
321 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
322 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
323 csk, csk->state, csk->flags, csk->tid, rst_status);
324
325 csk->cpl_abort_rpl = NULL;
326 set_queue(skb, CPL_PRIORITY_DATA, csk);
327 INIT_TP_WR(rpl, csk->tid);
328 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
329 rpl->cmd = rst_status;
330 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
331}
332
333/*
334 * CPL connection rx data ack: host ->
335 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
336 * credits sent.
337 */
338static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
339{
340 struct sk_buff *skb;
341 struct cpl_rx_data_ack *req;
342
343 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
344 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
345 csk, csk->state, csk->flags, csk->tid, credits);
346
24d3f95a 347 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
7b36b6e0 348 if (!skb) {
349 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
350 return 0;
351 }
352 req = (struct cpl_rx_data_ack *)skb->head;
353
354 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
355 INIT_TP_WR(req, csk->tid);
356 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
357 csk->tid));
358 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
359 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
360 return credits;
361}
362
363/*
364 * sgl_len - calculates the size of an SGL of the given capacity
365 * @n: the number of SGL entries
366 * Calculates the number of flits needed for a scatter/gather list that
367 * can hold the given number of entries.
368 */
369static inline unsigned int sgl_len(unsigned int n)
370{
371 n--;
372 return (3 * n) / 2 + (n & 1) + 2;
373}
374
375/*
376 * calc_tx_flits_ofld - calculate # of flits for an offload packet
377 * @skb: the packet
378 *
379 * Returns the number of flits needed for the given offload packet.
380 * These packets are already fully constructed and no additional headers
381 * will be added.
382 */
383static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
384{
385 unsigned int flits, cnt;
386
387 if (is_ofld_imm(skb))
388 return DIV_ROUND_UP(skb->len, 8);
389 flits = skb_transport_offset(skb) / 8;
390 cnt = skb_shinfo(skb)->nr_frags;
499e2e6f 391 if (skb_tail_pointer(skb) != skb_transport_header(skb))
7b36b6e0 392 cnt++;
393 return flits + sgl_len(cnt);
394}
395
396static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
397{
398 struct sk_buff *skb;
399 struct fw_flowc_wr *flowc;
400 int flowclen, i;
401
402 flowclen = 80;
24d3f95a 403 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
7b36b6e0 404 flowc = (struct fw_flowc_wr *)skb->head;
405 flowc->op_to_nparams =
406 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
407 flowc->flowid_len16 =
408 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
409 FW_WR_FLOWID(csk->tid));
410 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
e27d6169 411 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
7b36b6e0 412 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
413 flowc->mnemval[1].val = htonl(csk->tx_chan);
414 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
415 flowc->mnemval[2].val = htonl(csk->tx_chan);
416 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
417 flowc->mnemval[3].val = htonl(csk->rss_qid);
418 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
419 flowc->mnemval[4].val = htonl(csk->snd_nxt);
420 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
421 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
422 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
423 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
424 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
425 flowc->mnemval[7].val = htonl(csk->advmss);
426 flowc->mnemval[8].mnemonic = 0;
427 flowc->mnemval[8].val = 0;
428 for (i = 0; i < 9; i++) {
429 flowc->mnemval[i].r4[0] = 0;
430 flowc->mnemval[i].r4[1] = 0;
431 flowc->mnemval[i].r4[2] = 0;
432 }
433 set_queue(skb, CPL_PRIORITY_DATA, csk);
434
435 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
436 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
437 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
438 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
439 csk->advmss);
440
441 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
442}
443
444static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
445 int dlen, int len, u32 credits, int compl)
446{
447 struct fw_ofld_tx_data_wr *req;
448 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
449 unsigned int wr_ulp_mode = 0;
450
451 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
452
453 if (is_ofld_imm(skb)) {
454 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
455 FW_WR_COMPL(1) |
456 FW_WR_IMMDLEN(dlen));
457 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
458 FW_WR_LEN16(credits));
459 } else {
460 req->op_to_immdlen =
461 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
462 FW_WR_COMPL(1) |
463 FW_WR_IMMDLEN(0));
464 req->flowid_len16 =
465 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
466 FW_WR_LEN16(credits));
467 }
468 if (submode)
469 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
470 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
6aca4112
KX		 471 req->tunnel_to_proxy = htonl(wr_ulp_mode |
472 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1));
7b36b6e0 473 req->plen = htonl(len);
474 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
475 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
476}
477
478static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
479{
480 kfree_skb(skb);
481}
482
483static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
484{
485 int total_size = 0;
486 struct sk_buff *skb;
487
488 if (unlikely(csk->state < CTP_ESTABLISHED ||
489 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
490 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
491 1 << CXGBI_DBG_PDU_TX,
492 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
493 csk, csk->state, csk->flags, csk->tid);
494 return 0;
495 }
496
497 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
498 int dlen = skb->len;
499 int len = skb->len;
500 unsigned int credits_needed;
501
502 skb_reset_transport_header(skb);
503 if (is_ofld_imm(skb))
504 credits_needed = DIV_ROUND_UP(dlen +
505 sizeof(struct fw_ofld_tx_data_wr), 16);
506 else
507 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
508 + sizeof(struct fw_ofld_tx_data_wr),
509 16);
510
511 if (csk->wr_cred < credits_needed) {
512 log_debug(1 << CXGBI_DBG_PDU_TX,
513 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
514 csk, skb->len, skb->data_len,
515 credits_needed, csk->wr_cred);
516 break;
517 }
518 __skb_unlink(skb, &csk->write_queue);
519 set_queue(skb, CPL_PRIORITY_DATA, csk);
520 skb->csum = credits_needed;
521 csk->wr_cred -= credits_needed;
522 csk->wr_una_cred += credits_needed;
523 cxgbi_sock_enqueue_wr(csk, skb);
524
525 log_debug(1 << CXGBI_DBG_PDU_TX,
526 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
527 csk, skb->len, skb->data_len, credits_needed,
528 csk->wr_cred, csk->wr_una_cred);
529
530 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
531 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
532 send_tx_flowc_wr(csk);
533 skb->csum += 5;
534 csk->wr_cred -= 5;
535 csk->wr_una_cred += 5;
536 }
537 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
538 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
539 req_completion);
540 csk->snd_nxt += len;
541 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
542 }
543 total_size += skb->truesize;
544 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
545
546 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
547 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
548 csk, csk->state, csk->flags, csk->tid, skb, len);
549
550 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
551 }
552 return total_size;
553}
554
555static inline void free_atid(struct cxgbi_sock *csk)
556{
557 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
558
559 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
560 cxgb4_free_atid(lldi->tids, csk->atid);
561 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
562 cxgbi_sock_put(csk);
563 }
564}
565
566static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
567{
568 struct cxgbi_sock *csk;
569 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
570 unsigned short tcp_opt = ntohs(req->tcp_opt);
571 unsigned int tid = GET_TID(req);
572 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
573 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
574 struct tid_info *t = lldi->tids;
575 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
576
577 csk = lookup_atid(t, atid);
578 if (unlikely(!csk)) {
579 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
580 goto rel_skb;
581 }
582
e27d6169 583 if (csk->atid != atid) {
584 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
585 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
586 goto rel_skb;
587 }
588
7b36b6e0 589 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
590 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
591 csk, csk->state, csk->flags, tid, atid, rcv_isn);
592
593 cxgbi_sock_get(csk);
594 csk->tid = tid;
595 cxgb4_insert_tid(lldi->tids, csk, tid);
596 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
597
598 free_atid(csk);
599
600 spin_lock_bh(&csk->lock);
601 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
602 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
603 csk, csk->state, csk->flags, csk->tid);
604
605 if (csk->retry_timer.function) {
606 del_timer(&csk->retry_timer);
607 csk->retry_timer.function = NULL;
608 }
609
610 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
611 /*
612 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
613 * pass through opt0.
614 */
615 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
616 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
617
618 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
619 if (GET_TCPOPT_TSTAMP(tcp_opt))
620 csk->advmss -= 12;
621 if (csk->advmss < 128)
622 csk->advmss = 128;
623
624 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
625 "csk 0x%p, mss_idx %u, advmss %u.\n",
626 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
627
628 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
629
630 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
631 send_abort_req(csk);
632 else {
633 if (skb_queue_len(&csk->write_queue))
634 push_tx_frames(csk, 0);
635 cxgbi_conn_tx_open(csk);
636 }
637 spin_unlock_bh(&csk->lock);
638
639rel_skb:
640 __kfree_skb(skb);
641}
642
643static int act_open_rpl_status_to_errno(int status)
644{
645 switch (status) {
646 case CPL_ERR_CONN_RESET:
647 return -ECONNREFUSED;
648 case CPL_ERR_ARP_MISS:
649 return -EHOSTUNREACH;
650 case CPL_ERR_CONN_TIMEDOUT:
651 return -ETIMEDOUT;
652 case CPL_ERR_TCAM_FULL:
653 return -ENOMEM;
654 case CPL_ERR_CONN_EXIST:
655 return -EADDRINUSE;
656 default:
657 return -EIO;
658 }
659}
660
661static void csk_act_open_retry_timer(unsigned long data)
662{
663 struct sk_buff *skb;
664 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
3bd3e8bf 665 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
7b36b6e0 666
667 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
668 "csk 0x%p,%u,0x%lx,%u.\n",
669 csk, csk->state, csk->flags, csk->tid);
670
671 cxgbi_sock_get(csk);
672 spin_lock_bh(&csk->lock);
3bd3e8bf
KX		 673 skb = alloc_wr(is_t4(lldi->adapter_type) ?
674 sizeof(struct cpl_act_open_req) :
675 sizeof(struct cpl_t5_act_open_req),
676 0, GFP_ATOMIC);
7b36b6e0 677 if (!skb)
678 cxgbi_sock_fail_act_open(csk, -ENOMEM);
679 else {
680 skb->sk = (struct sock *)csk;
681 t4_set_arp_err_handler(skb, csk,
682 cxgbi_sock_act_open_req_arp_failure);
683 send_act_open_req(csk, skb, csk->l2t);
684 }
685 spin_unlock_bh(&csk->lock);
686 cxgbi_sock_put(csk);
687}
688
689static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
690{
691 struct cxgbi_sock *csk;
692 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
693 unsigned int tid = GET_TID(rpl);
694 unsigned int atid =
695 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
696 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
697 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
698 struct tid_info *t = lldi->tids;
699
700 csk = lookup_atid(t, atid);
701 if (unlikely(!csk)) {
702 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
703 goto rel_skb;
704 }
705
e27d6169 706 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
707 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
708 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
709 atid, tid, status, csk, csk->state, csk->flags);
7b36b6e0 710
150cca7c
KX		 711 if (status == CPL_ERR_RTX_NEG_ADVICE)
712 goto rel_skb;
713
7b36b6e0 714 if (status && status != CPL_ERR_TCAM_FULL &&
715 status != CPL_ERR_CONN_EXIST &&
716 status != CPL_ERR_ARP_MISS)
717 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
718
719 cxgbi_sock_get(csk);
720 spin_lock_bh(&csk->lock);
721
722 if (status == CPL_ERR_CONN_EXIST &&
723 csk->retry_timer.function != csk_act_open_retry_timer) {
724 csk->retry_timer.function = csk_act_open_retry_timer;
725 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
726 } else
727 cxgbi_sock_fail_act_open(csk,
728 act_open_rpl_status_to_errno(status));
729
730 spin_unlock_bh(&csk->lock);
731 cxgbi_sock_put(csk);
732rel_skb:
733 __kfree_skb(skb);
734}
735
736static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
737{
738 struct cxgbi_sock *csk;
739 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
740 unsigned int tid = GET_TID(req);
741 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
742 struct tid_info *t = lldi->tids;
743
744 csk = lookup_tid(t, tid);
745 if (unlikely(!csk)) {
746 pr_err("can't find connection for tid %u.\n", tid);
747 goto rel_skb;
748 }
749 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
750 "csk 0x%p,%u,0x%lx,%u.\n",
751 csk, csk->state, csk->flags, csk->tid);
752 cxgbi_sock_rcv_peer_close(csk);
753rel_skb:
754 __kfree_skb(skb);
755}
756
757static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
758{
759 struct cxgbi_sock *csk;
760 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
761 unsigned int tid = GET_TID(rpl);
762 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
763 struct tid_info *t = lldi->tids;
764
765 csk = lookup_tid(t, tid);
766 if (unlikely(!csk)) {
767 pr_err("can't find connection for tid %u.\n", tid);
768 goto rel_skb;
769 }
770 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
771 "csk 0x%p,%u,0x%lx,%u.\n",
772 csk, csk->state, csk->flags, csk->tid);
773 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
774rel_skb:
775 __kfree_skb(skb);
776}
777
778static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
779 int *need_rst)
780{
781 switch (abort_reason) {
782 case CPL_ERR_BAD_SYN: /* fall through */
783 case CPL_ERR_CONN_RESET:
784 return csk->state > CTP_ESTABLISHED ?
785 -EPIPE : -ECONNRESET;
786 case CPL_ERR_XMIT_TIMEDOUT:
787 case CPL_ERR_PERSIST_TIMEDOUT:
788 case CPL_ERR_FINWAIT2_TIMEDOUT:
789 case CPL_ERR_KEEPALIVE_TIMEDOUT:
790 return -ETIMEDOUT;
791 default:
792 return -EIO;
793 }
794}
795
796static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
797{
798 struct cxgbi_sock *csk;
799 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
800 unsigned int tid = GET_TID(req);
801 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
802 struct tid_info *t = lldi->tids;
803 int rst_status = CPL_ABORT_NO_RST;
804
805 csk = lookup_tid(t, tid);
806 if (unlikely(!csk)) {
807 pr_err("can't find connection for tid %u.\n", tid);
808 goto rel_skb;
809 }
810
811 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
812 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
813 csk, csk->state, csk->flags, csk->tid, req->status);
814
815 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
816 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
817 goto rel_skb;
818
819 cxgbi_sock_get(csk);
820 spin_lock_bh(&csk->lock);
821
822 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
823 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
824 cxgbi_sock_set_state(csk, CTP_ABORTING);
825 goto done;
826 }
827
828 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
829 send_abort_rpl(csk, rst_status);
830
831 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
832 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
833 cxgbi_sock_closed(csk);
834 }
835done:
836 spin_unlock_bh(&csk->lock);
837 cxgbi_sock_put(csk);
838rel_skb:
839 __kfree_skb(skb);
840}
841
842static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
843{
844 struct cxgbi_sock *csk;
845 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
846 unsigned int tid = GET_TID(rpl);
847 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
848 struct tid_info *t = lldi->tids;
849
850 csk = lookup_tid(t, tid);
851 if (!csk)
852 goto rel_skb;
853
854 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
855 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
856 rpl->status, csk, csk ? csk->state : 0,
857 csk ? csk->flags : 0UL);
858
859 if (rpl->status == CPL_ERR_ABORT_FAILED)
860 goto rel_skb;
861
862 cxgbi_sock_rcv_abort_rpl(csk);
863rel_skb:
864 __kfree_skb(skb);
865}
866
867static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
868{
869 struct cxgbi_sock *csk;
870 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
871 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
872 unsigned int tid = GET_TID(cpl);
873 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
874 struct tid_info *t = lldi->tids;
7b36b6e0 875
876 csk = lookup_tid(t, tid);
877 if (unlikely(!csk)) {
878 pr_err("can't find conn. for tid %u.\n", tid);
879 goto rel_skb;
880 }
881
882 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
883 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
884 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
885 pdu_len_ddp);
886
887 spin_lock_bh(&csk->lock);
888
889 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
890 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
891 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
892 csk, csk->state, csk->flags, csk->tid);
893 if (csk->state != CTP_ABORTING)
894 goto abort_conn;
895 else
896 goto discard;
897 }
898
899 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 900 cxgbi_skcb_flags(skb) = 0;
901
7b36b6e0 902 skb_reset_transport_header(skb);
903 __skb_pull(skb, sizeof(*cpl));
904 __pskb_trim(skb, ntohs(cpl->len));
905
906 if (!csk->skb_ulp_lhdr) {
907 unsigned char *bhs;
3bd3e8bf 908 unsigned int hlen, dlen, plen;
7b36b6e0 909
910 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
911 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
912 csk, csk->state, csk->flags, csk->tid, skb);
913 csk->skb_ulp_lhdr = skb;
e27d6169 914 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 915
e27d6169 916 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 917 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 918 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 919 csk->rcv_nxt);
920 goto abort_conn;
921 }
922
e27d6169 923 bhs = skb->data;
7b36b6e0 924 hlen = ntohs(cpl->len);
925 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
926
3bd3e8bf
KX		 927 plen = ISCSI_PDU_LEN(pdu_len_ddp);
928 if (is_t4(lldi->adapter_type))
929 plen -= 40;
930
931 if ((hlen + dlen) != plen) {
7b36b6e0 932 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
933 "mismatch %u != %u + %u, seq 0x%x.\n",
3bd3e8bf
KX		 934 csk->tid, plen, hlen, dlen,
935 cxgbi_skcb_tcp_seq(skb));
7b36b6e0 936 goto abort_conn;
937 }
938
939 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
940 if (dlen)
941 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
942 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
943
944 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
945 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
946 csk, skb, *bhs, hlen, dlen,
947 ntohl(*((unsigned int *)(bhs + 16))),
948 ntohl(*((unsigned int *)(bhs + 24))));
949
950 } else {
e27d6169 951 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 952
e27d6169 953 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 954 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
955 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
956 csk, csk->state, csk->flags, skb, lskb);
957 }
958
959 __skb_queue_tail(&csk->receive_queue, skb);
960 spin_unlock_bh(&csk->lock);
961 return;
962
963abort_conn:
964 send_abort_req(csk);
965discard:
966 spin_unlock_bh(&csk->lock);
967rel_skb:
968 __kfree_skb(skb);
969}
970
971static void do_rx_data_ddp(struct cxgbi_device *cdev,
972 struct sk_buff *skb)
973{
974 struct cxgbi_sock *csk;
975 struct sk_buff *lskb;
976 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
977 unsigned int tid = GET_TID(rpl);
978 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
979 struct tid_info *t = lldi->tids;
980 unsigned int status = ntohl(rpl->ddpvld);
981
982 csk = lookup_tid(t, tid);
983 if (unlikely(!csk)) {
984 pr_err("can't find connection for tid %u.\n", tid);
985 goto rel_skb;
986 }
987
988 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
989 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
990 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
991
992 spin_lock_bh(&csk->lock);
993
994 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
995 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
996 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
997 csk, csk->state, csk->flags, csk->tid);
998 if (csk->state != CTP_ABORTING)
999 goto abort_conn;
1000 else
1001 goto discard;
1002 }
1003
1004 if (!csk->skb_ulp_lhdr) {
1005 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1006 goto abort_conn;
1007 }
1008
1009 lskb = csk->skb_ulp_lhdr;
1010 csk->skb_ulp_lhdr = NULL;
1011
7b36b6e0 1012 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1013
1014 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1015 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1016 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1017
1018 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
e27d6169 1019 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1020 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1021 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1022 }
1023 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
e27d6169 1024 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1025 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1026 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1027 }
1028 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1029 log_debug(1 << CXGBI_DBG_PDU_RX,
1030 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1031 csk, lskb, status);
1032 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1033 }
1034 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1035 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1036 log_debug(1 << CXGBI_DBG_PDU_RX,
1037 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1038 csk, lskb, status);
1039 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1040 }
1041 log_debug(1 << CXGBI_DBG_PDU_RX,
1042 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1043 csk, lskb, cxgbi_skcb_flags(lskb));
1044
e27d6169 1045 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1046 cxgbi_conn_pdu_ready(csk);
1047 spin_unlock_bh(&csk->lock);
1048 goto rel_skb;
1049
1050abort_conn:
1051 send_abort_req(csk);
1052discard:
1053 spin_unlock_bh(&csk->lock);
1054rel_skb:
1055 __kfree_skb(skb);
1056}
1057
1058static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1059{
1060 struct cxgbi_sock *csk;
1061 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1062 unsigned int tid = GET_TID(rpl);
1063 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1064 struct tid_info *t = lldi->tids;
1065
1066 csk = lookup_tid(t, tid);
1067 if (unlikely(!csk))
1068 pr_err("can't find connection for tid %u.\n", tid);
1069 else {
1070 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1071 "csk 0x%p,%u,0x%lx,%u.\n",
1072 csk, csk->state, csk->flags, csk->tid);
1073 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1074 rpl->seq_vld);
1075 }
1076 __kfree_skb(skb);
1077}
1078
1079static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1080{
1081 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1082 unsigned int tid = GET_TID(rpl);
1083 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1084 struct tid_info *t = lldi->tids;
1085 struct cxgbi_sock *csk;
1086
1087 csk = lookup_tid(t, tid);
1088 if (!csk)
1089 pr_err("can't find conn. for tid %u.\n", tid);
1090
1091 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1092 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1093 csk, csk->state, csk->flags, csk->tid, rpl->status);
1094
1095 if (rpl->status != CPL_ERR_NONE)
1096 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1097 csk, tid, rpl->status);
1098
1099 __kfree_skb(skb);
1100}
1101
1102static int alloc_cpls(struct cxgbi_sock *csk)
1103{
24d3f95a 1104 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1105 0, GFP_KERNEL);
7b36b6e0 1106 if (!csk->cpl_close)
1107 return -ENOMEM;
1108
24d3f95a 1109 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1110 0, GFP_KERNEL);
7b36b6e0 1111 if (!csk->cpl_abort_req)
1112 goto free_cpls;
1113
24d3f95a 1114 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1115 0, GFP_KERNEL);
7b36b6e0 1116 if (!csk->cpl_abort_rpl)
1117 goto free_cpls;
1118 return 0;
1119
1120free_cpls:
1121 cxgbi_sock_free_cpl_skbs(csk);
1122 return -ENOMEM;
1123}
1124
1125static inline void l2t_put(struct cxgbi_sock *csk)
1126{
1127 if (csk->l2t) {
1128 cxgb4_l2t_release(csk->l2t);
1129 csk->l2t = NULL;
1130 cxgbi_sock_put(csk);
1131 }
1132}
1133
1134static void release_offload_resources(struct cxgbi_sock *csk)
1135{
1136 struct cxgb4_lld_info *lldi;
1137
1138 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1139 "csk 0x%p,%u,0x%lx,%u.\n",
1140 csk, csk->state, csk->flags, csk->tid);
1141
1142 cxgbi_sock_free_cpl_skbs(csk);
1143 if (csk->wr_cred != csk->wr_max_cred) {
1144 cxgbi_sock_purge_wr_queue(csk);
1145 cxgbi_sock_reset_wr_list(csk);
1146 }
1147
1148 l2t_put(csk);
1149 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1150 free_atid(csk);
1151 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1152 lldi = cxgbi_cdev_priv(csk->cdev);
1153 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1154 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1155 cxgbi_sock_put(csk);
1156 }
1157 csk->dst = NULL;
1158 csk->cdev = NULL;
1159}
1160
1161static int init_act_open(struct cxgbi_sock *csk)
1162{
1163 struct cxgbi_device *cdev = csk->cdev;
1164 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1165 struct net_device *ndev = cdev->ports[csk->port_id];
1166 struct port_info *pi = netdev_priv(ndev);
1167 struct sk_buff *skb = NULL;
51e059bd 1168 struct neighbour *n;
7b36b6e0 1169 unsigned int step;
1170
1171 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1172 "csk 0x%p,%u,0x%lx,%u.\n",
1173 csk, csk->state, csk->flags, csk->tid);
1174
1175 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1176 if (csk->atid < 0) {
1177 pr_err("%s, NO atid available.\n", ndev->name);
1178 return -EINVAL;
1179 }
1180 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1181 cxgbi_sock_get(csk);
1182
c4737377 1183 n = dst_neigh_lookup(csk->dst, &csk->daddr.sin_addr.s_addr);
51e059bd
DM		 1184 if (!n) {
1185 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1186 goto rel_resource;
1187 }
1188 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
7b36b6e0 1189 if (!csk->l2t) {
1190 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1191 goto rel_resource;
1192 }
1193 cxgbi_sock_get(csk);
1194
3bd3e8bf
KX		 1195 skb = alloc_wr(is_t4(lldi->adapter_type) ?
1196 sizeof(struct cpl_act_open_req) :
1197 sizeof(struct cpl_t5_act_open_req),
1198 0, GFP_ATOMIC);
7b36b6e0 1199 if (!skb)
1200 goto rel_resource;
1201 skb->sk = (struct sock *)csk;
1202 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1203
1204 if (!csk->mtu)
1205 csk->mtu = dst_mtu(csk->dst);
1206 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1207 csk->tx_chan = cxgb4_port_chan(ndev);
1208 /* SMT two entries per row */
1209 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1210 step = lldi->ntxq / lldi->nchan;
1211 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1212 step = lldi->nrxq / lldi->nchan;
1213 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1214 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1215 csk->wr_una_cred = 0;
1216 cxgbi_sock_reset_wr_list(csk);
1217 csk->err = 0;
1218 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1219 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1220 csk, pi->port_id, ndev->name, csk->tx_chan,
1221 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1222 csk->smac_idx);
1223
1224 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1225 send_act_open_req(csk, skb, csk->l2t);
c4737377 1226 neigh_release(n);
7b36b6e0 1227 return 0;
1228
1229rel_resource:
c4737377
DM		 1230 if (n)
1231 neigh_release(n);
7b36b6e0 1232 if (skb)
1233 __kfree_skb(skb);
1234 return -EINVAL;
1235}
1236
3bd3e8bf
KX		 1237#define CPL_ISCSI_DATA 0xB2
1238#define CPL_RX_ISCSI_DDP 0x49
7b36b6e0 1239cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1240 [CPL_ACT_ESTABLISH] = do_act_establish,
1241 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1242 [CPL_PEER_CLOSE] = do_peer_close,
1243 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1244 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1245 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1246 [CPL_FW4_ACK] = do_fw4_ack,
1247 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
3bd3e8bf 1248 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
7b36b6e0 1249 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1250 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
3bd3e8bf 1251 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
7b36b6e0 1252};
1253
1254int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1255{
1256 int rc;
1257
1258 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1259 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1260
1261 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1262 cxgb4i_max_connect);
1263 if (rc < 0)
1264 return rc;
1265
1266 cdev->csk_release_offload_resources = release_offload_resources;
1267 cdev->csk_push_tx_frames = push_tx_frames;
1268 cdev->csk_send_abort_req = send_abort_req;
1269 cdev->csk_send_close_req = send_close_req;
1270 cdev->csk_send_rx_credits = send_rx_credits;
1271 cdev->csk_alloc_cpls = alloc_cpls;
1272 cdev->csk_init_act_open = init_act_open;
1273
1274 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1275 return 0;
1276}
1277
1278/*
1279 * functions to program the pagepod in h/w
1280 */
e27d6169 1281#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
3bd3e8bf
KX		 1282static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1283 struct ulp_mem_io *req,
e27d6169 1284 unsigned int wr_len, unsigned int dlen,
1285 unsigned int pm_addr)
7b36b6e0 1286{
e27d6169 1287 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
7b36b6e0 1288
1289 INIT_ULPTX_WR(req, wr_len, 0, 0);
3bd3e8bf
KX		 1290 if (is_t4(lldi->adapter_type))
1291 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1292 (ULP_MEMIO_ORDER(1)));
1293 else
1294 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1295 (V_T5_ULP_MEMIO_IMM(1)));
7b36b6e0 1296 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1297 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1298 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
e27d6169 1299
1300 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1301 idata->len = htonl(dlen);
7b36b6e0 1302}
1303
e27d6169 1304static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
7b36b6e0 1305 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1306 unsigned int npods,
1307 struct cxgbi_gather_list *gl,
1308 unsigned int gl_pidx)
1309{
1310 struct cxgbi_ddp_info *ddp = cdev->ddp;
3bd3e8bf 1311 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
7b36b6e0 1312 struct sk_buff *skb;
1313 struct ulp_mem_io *req;
e27d6169 1314 struct ulptx_idata *idata;
7b36b6e0 1315 struct cxgbi_pagepod *ppod;
e27d6169 1316 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1317 unsigned int dlen = PPOD_SIZE * npods;
1318 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1319 sizeof(struct ulptx_idata) + dlen, 16);
7b36b6e0 1320 unsigned int i;
1321
e27d6169 1322 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
7b36b6e0 1323 if (!skb) {
1324 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1325 cdev, idx, npods);
1326 return -ENOMEM;
1327 }
1328 req = (struct ulp_mem_io *)skb->head;
1329 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1330
3bd3e8bf 1331 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
e27d6169 1332 idata = (struct ulptx_idata *)(req + 1);
1333 ppod = (struct cxgbi_pagepod *)(idata + 1);
7b36b6e0 1334
1335 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1336 if (!hdr && !gl)
1337 cxgbi_ddp_ppod_clear(ppod);
1338 else
1339 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1340 }
1341
1342 cxgb4_ofld_send(cdev->ports[port_id], skb);
1343 return 0;
1344}
1345
1346static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1347 unsigned int idx, unsigned int npods,
1348 struct cxgbi_gather_list *gl)
1349{
1350 unsigned int i, cnt;
1351 int err = 0;
1352
1353 for (i = 0; i < npods; i += cnt, idx += cnt) {
1354 cnt = npods - i;
e27d6169 1355 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1356 cnt = ULPMEM_IDATA_MAX_NPPODS;
1357 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
7b36b6e0 1358 idx, cnt, gl, 4 * i);
1359 if (err < 0)
1360 break;
1361 }
1362 return err;
1363}
1364
1365static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1366 unsigned int idx, unsigned int npods)
1367{
1368 unsigned int i, cnt;
1369 int err;
1370
1371 for (i = 0; i < npods; i += cnt, idx += cnt) {
1372 cnt = npods - i;
e27d6169 1373 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1374 cnt = ULPMEM_IDATA_MAX_NPPODS;
1375 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
7b36b6e0 1376 idx, cnt, NULL, 0);
1377 if (err < 0)
1378 break;
1379 }
1380}
1381
1382static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1383 int pg_idx, bool reply)
1384{
1385 struct sk_buff *skb;
1386 struct cpl_set_tcb_field *req;
7b36b6e0 1387
e27d6169 1388 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1389 return 0;
1390
24d3f95a 1391 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1392 if (!skb)
1393 return -ENOMEM;
1394
e27d6169 1395 /* set up ulp page size */
7b36b6e0 1396 req = (struct cpl_set_tcb_field *)skb->head;
1397 INIT_TP_WR(req, csk->tid);
1398 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1399 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1400 req->word_cookie = htons(0);
1401 req->mask = cpu_to_be64(0x3 << 8);
1402 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1403 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1404
1405 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1406 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1407
1408 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1409 return 0;
1410}
1411
1412static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1413 int hcrc, int dcrc, int reply)
1414{
1415 struct sk_buff *skb;
1416 struct cpl_set_tcb_field *req;
7b36b6e0 1417
e27d6169 1418 if (!hcrc && !dcrc)
1419 return 0;
7b36b6e0 1420
24d3f95a 1421 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1422 if (!skb)
1423 return -ENOMEM;
1424
1425 csk->hcrc_len = (hcrc ? 4 : 0);
1426 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1427 /* set up ulp submode */
7b36b6e0 1428 req = (struct cpl_set_tcb_field *)skb->head;
1429 INIT_TP_WR(req, tid);
1430 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1431 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1432 req->word_cookie = htons(0);
1433 req->mask = cpu_to_be64(0x3 << 4);
1434 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1435 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1436 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1437
1438 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1439 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1440
1441 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1442 return 0;
1443}
1444
1445static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1446{
1447 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1448 struct cxgbi_ddp_info *ddp = cdev->ddp;
1449 unsigned int tagmask, pgsz_factor[4];
1450 int err;
1451
1452 if (ddp) {
1453 kref_get(&ddp->refcnt);
1454 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1455 cdev, cdev->ddp);
1456 return -EALREADY;
1457 }
1458
1459 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1460 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1461 lldi->iscsi_iolen, lldi->iscsi_iolen);
1462 if (err < 0)
1463 return err;
1464
1465 ddp = cdev->ddp;
1466
1467 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1468 cxgbi_ddp_page_size_factor(pgsz_factor);
1469 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1470
7b36b6e0 1471 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1472 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1473 cdev->csk_ddp_set = ddp_set_map;
1474 cdev->csk_ddp_clear = ddp_clear_map;
1475
1476 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1477 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1478 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1479 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1480 " %u/%u.\n",
1481 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1482 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1483 ddp->max_rxsz, lldi->iscsi_iolen);
1484 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1485 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1486 ddp->max_rxsz);
1487 return 0;
1488}
1489
1490static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1491{
1492 struct cxgbi_device *cdev;
1493 struct port_info *pi;
1494 int i, rc;
1495
1496 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1497 if (!cdev) {
1498 pr_info("t4 device 0x%p, register failed.\n", lldi);
1499 return NULL;
1500 }
1501 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1502 cdev, lldi->adapter_type, lldi->nports,
1503 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1504 lldi->nrxq, lldi->wr_cred);
1505 for (i = 0; i < lldi->nrxq; i++)
1506 log_debug(1 << CXGBI_DBG_DEV,
1507 "t4 0x%p, rxq id #%d: %u.\n",
1508 cdev, i, lldi->rxq_ids[i]);
1509
1510 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1511 cdev->flags = CXGBI_FLAG_DEV_T4;
1512 cdev->pdev = lldi->pdev;
1513 cdev->ports = lldi->ports;
1514 cdev->nports = lldi->nports;
1515 cdev->mtus = lldi->mtus;
1516 cdev->nmtus = NMTUS;
1517 cdev->snd_win = cxgb4i_snd_win;
1518 cdev->rcv_win = cxgb4i_rcv_win;
1519 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1520 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1521 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1522 cdev->itp = &cxgb4i_iscsi_transport;
1523
e27d6169 1524 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1525 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1526 cdev, lldi->ports[0]->name, cdev->pfvf);
1527
7b36b6e0 1528 rc = cxgb4i_ddp_init(cdev);
1529 if (rc) {
1530 pr_info("t4 0x%p ddp init failed.\n", cdev);
1531 goto err_out;
1532 }
1533 rc = cxgb4i_ofld_init(cdev);
1534 if (rc) {
1535 pr_info("t4 0x%p ofld init failed.\n", cdev);
1536 goto err_out;
1537 }
1538
1539 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1540 &cxgb4i_host_template, cxgb4i_stt);
1541 if (rc)
1542 goto err_out;
1543
1544 for (i = 0; i < cdev->nports; i++) {
1545 pi = netdev_priv(lldi->ports[i]);
1546 cdev->hbas[i]->port_id = pi->port_id;
1547 }
1548 return cdev;
1549
1550err_out:
1551 cxgbi_device_unregister(cdev);
1552 return ERR_PTR(-ENOMEM);
1553}
1554
1555#define RX_PULL_LEN 128
1556static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1557 const struct pkt_gl *pgl)
1558{
1559 const struct cpl_act_establish *rpl;
1560 struct sk_buff *skb;
1561 unsigned int opc;
1562 struct cxgbi_device *cdev = handle;
1563
1564 if (pgl == NULL) {
1565 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1566
24d3f95a 1567 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 1568 if (!skb)
1569 goto nomem;
1570 skb_copy_to_linear_data(skb, &rsp[1], len);
1571 } else {
1572 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1573 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1574 pgl->va, be64_to_cpu(*rsp),
1575 be64_to_cpu(*(u64 *)pgl->va),
1576 pgl->tot_len);
1577 return 0;
1578 }
1579 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1580 if (unlikely(!skb))
1581 goto nomem;
1582 }
1583
1584 rpl = (struct cpl_act_establish *)skb->data;
1585 opc = rpl->ot.opcode;
1586 log_debug(1 << CXGBI_DBG_TOE,
1587 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1588 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1589 if (cxgb4i_cplhandlers[opc])
1590 cxgb4i_cplhandlers[opc](cdev, skb);
1591 else {
1592 pr_err("No handler for opcode 0x%x.\n", opc);
1593 __kfree_skb(skb);
1594 }
1595 return 0;
1596nomem:
1597 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1598 return 1;
1599}
1600
1601static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1602{
1603 struct cxgbi_device *cdev = handle;
1604
1605 switch (state) {
1606 case CXGB4_STATE_UP:
1607 pr_info("cdev 0x%p, UP.\n", cdev);
1608 /* re-initialize */
1609 break;
1610 case CXGB4_STATE_START_RECOVERY:
1611 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1612 /* close all connections */
1613 break;
1614 case CXGB4_STATE_DOWN:
1615 pr_info("cdev 0x%p, DOWN.\n", cdev);
1616 break;
1617 case CXGB4_STATE_DETACH:
1618 pr_info("cdev 0x%p, DETACH.\n", cdev);
c3b331a3 1619 cxgbi_device_unregister(cdev);
7b36b6e0 1620 break;
1621 default:
1622 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1623 break;
1624 }
1625 return 0;
1626}
1627
1628static int __init cxgb4i_init_module(void)
1629{
1630 int rc;
1631
1632 printk(KERN_INFO "%s", version);
1633
1634 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1635 if (rc < 0)
1636 return rc;
1637 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1638 return 0;
1639}
1640
1641static void __exit cxgb4i_exit_module(void)
1642{
1643 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1644 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1645 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1646}
1647
1648module_init(cxgb4i_init_module);
1649module_exit(cxgb4i_exit_module);
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