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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
[linux-btrfs-devel.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
blobae13c4993aa378e2cc978f2215f73d6b938cd20b
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
16 #include <linux/version.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <scsi/scsi_host.h>
20 #include <net/tcp.h>
21 #include <net/dst.h>
22 #include <linux/netdevice.h>
23
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
31 static unsigned int dbg_level;
32
33 #include "../libcxgbi.h"
34
35 #define DRV_MODULE_NAME "cxgb4i"
36 #define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver"
37 #define DRV_MODULE_VERSION "0.9.1"
38 #define DRV_MODULE_RELDATE "Aug. 2010"
39
40 static char version[] =
41 DRV_MODULE_DESC " " DRV_MODULE_NAME
42 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
43
44 MODULE_AUTHOR("Chelsio Communications, Inc.");
45 MODULE_DESCRIPTION(DRV_MODULE_DESC);
46 MODULE_VERSION(DRV_MODULE_VERSION);
47 MODULE_LICENSE("GPL");
48
49 module_param(dbg_level, uint, 0644);
50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
51
52 static int cxgb4i_rcv_win = 256 * 1024;
53 module_param(cxgb4i_rcv_win, int, 0644);
54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
55
56 static int cxgb4i_snd_win = 128 * 1024;
57 module_param(cxgb4i_snd_win, int, 0644);
58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
59
60 static int cxgb4i_rx_credit_thres = 10 * 1024;
61 module_param(cxgb4i_rx_credit_thres, int, 0644);
62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
63 "RX credits return threshold in bytes (default=10KB)");
64
65 static unsigned int cxgb4i_max_connect = (8 * 1024);
66 module_param(cxgb4i_max_connect, uint, 0644);
67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
68
69 static unsigned short cxgb4i_sport_base = 20000;
70 module_param(cxgb4i_sport_base, ushort, 0644);
71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
72
73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
74
75 static void *t4_uld_add(const struct cxgb4_lld_info *);
76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
77 static int t4_uld_state_change(void *, enum cxgb4_state state);
78
79 static 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
86 static 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
104 static 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 |
109 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
110 .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH |
111 ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN |
112 ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T |
113 ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST |
114 ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN |
115 ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL |
116 ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
117 ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT |
118 ISCSI_PERSISTENT_ADDRESS |
119 ISCSI_TARGET_NAME | ISCSI_TPGT |
120 ISCSI_USERNAME | ISCSI_PASSWORD |
121 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
122 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
123 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
124 ISCSI_PING_TMO | ISCSI_RECV_TMO |
125 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
126 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
127 ISCSI_HOST_INITIATOR_NAME |
128 ISCSI_HOST_NETDEV_NAME,
129 .get_host_param = cxgbi_get_host_param,
130 .set_host_param = cxgbi_set_host_param,
131 /* session management */
132 .create_session = cxgbi_create_session,
133 .destroy_session = cxgbi_destroy_session,
134 .get_session_param = iscsi_session_get_param,
135 /* connection management */
136 .create_conn = cxgbi_create_conn,
137 .bind_conn = cxgbi_bind_conn,
138 .destroy_conn = iscsi_tcp_conn_teardown,
139 .start_conn = iscsi_conn_start,
140 .stop_conn = iscsi_conn_stop,
141 .get_conn_param = iscsi_conn_get_param,
142 .set_param = cxgbi_set_conn_param,
143 .get_stats = cxgbi_get_conn_stats,
144 /* pdu xmit req from user space */
145 .send_pdu = iscsi_conn_send_pdu,
146 /* task */
147 .init_task = iscsi_tcp_task_init,
148 .xmit_task = iscsi_tcp_task_xmit,
149 .cleanup_task = cxgbi_cleanup_task,
150 /* pdu */
151 .alloc_pdu = cxgbi_conn_alloc_pdu,
152 .init_pdu = cxgbi_conn_init_pdu,
153 .xmit_pdu = cxgbi_conn_xmit_pdu,
154 .parse_pdu_itt = cxgbi_parse_pdu_itt,
155 /* TCP connect/disconnect */
156 .get_ep_param = cxgbi_get_ep_param,
157 .ep_connect = cxgbi_ep_connect,
158 .ep_poll = cxgbi_ep_poll,
159 .ep_disconnect = cxgbi_ep_disconnect,
160 /* Error recovery timeout call */
161 .session_recovery_timedout = iscsi_session_recovery_timedout,
162 };
163
164 static struct scsi_transport_template *cxgb4i_stt;
165
166 /*
167 * CPL (Chelsio Protocol Language) defines a message passing interface between
168 * the host driver and Chelsio asic.
169 * The section below implments CPLs that related to iscsi tcp connection
170 * open/close/abort and data send/receive.
171 */
172 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
173 #define RCV_BUFSIZ_MASK 0x3FFU
174 #define MAX_IMM_TX_PKT_LEN 128
175
176 static inline void set_queue(struct sk_buff *skb, unsigned int queue,
177 const struct cxgbi_sock *csk)
178 {
179 skb->queue_mapping = queue;
180 }
181
182 static int push_tx_frames(struct cxgbi_sock *, int);
183
184 /*
185 * is_ofld_imm - check whether a packet can be sent as immediate data
186 * @skb: the packet
187 *
188 * Returns true if a packet can be sent as an offload WR with immediate
189 * data. We currently use the same limit as for Ethernet packets.
190 */
191 static inline int is_ofld_imm(const struct sk_buff *skb)
192 {
193 return skb->len <= (MAX_IMM_TX_PKT_LEN -
194 sizeof(struct fw_ofld_tx_data_wr));
195 }
196
197 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
198 struct l2t_entry *e)
199 {
200 struct cpl_act_open_req *req;
201 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
202 unsigned long long opt0;
203 unsigned int opt2;
204 unsigned int qid_atid = ((unsigned int)csk->atid) |
205 (((unsigned int)csk->rss_qid) << 14);
206
207 opt0 = KEEP_ALIVE(1) |
208 WND_SCALE(wscale) |
209 MSS_IDX(csk->mss_idx) |
210 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
211 TX_CHAN(csk->tx_chan) |
212 SMAC_SEL(csk->smac_idx) |
213 ULP_MODE(ULP_MODE_ISCSI) |
214 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
215 opt2 = RX_CHANNEL(0) |
216 RSS_QUEUE_VALID |
217 (1 << 20) | (1 << 22) |
218 RSS_QUEUE(csk->rss_qid);
219
220 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
221 req = (struct cpl_act_open_req *)skb->head;
222
223 INIT_TP_WR(req, 0);
224 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
225 qid_atid));
226 req->local_port = csk->saddr.sin_port;
227 req->peer_port = csk->daddr.sin_port;
228 req->local_ip = csk->saddr.sin_addr.s_addr;
229 req->peer_ip = csk->daddr.sin_addr.s_addr;
230 req->opt0 = cpu_to_be64(opt0);
231 req->params = 0;
232 req->opt2 = cpu_to_be32(opt2);
233
234 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
235 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
236 csk, &req->local_ip, ntohs(req->local_port),
237 &req->peer_ip, ntohs(req->peer_port),
238 csk->atid, csk->rss_qid);
239
240 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
241 }
242
243 static void send_close_req(struct cxgbi_sock *csk)
244 {
245 struct sk_buff *skb = csk->cpl_close;
246 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
247 unsigned int tid = csk->tid;
248
249 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
250 "csk 0x%p,%u,0x%lx, tid %u.\n",
251 csk, csk->state, csk->flags, csk->tid);
252 csk->cpl_close = NULL;
253 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
254 INIT_TP_WR(req, tid);
255 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
256 req->rsvd = 0;
257
258 cxgbi_sock_skb_entail(csk, skb);
259 if (csk->state >= CTP_ESTABLISHED)
260 push_tx_frames(csk, 1);
261 }
262
263 static void abort_arp_failure(void *handle, struct sk_buff *skb)
264 {
265 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
266 struct cpl_abort_req *req;
267
268 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
269 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
270 csk, csk->state, csk->flags, csk->tid);
271 req = (struct cpl_abort_req *)skb->data;
272 req->cmd = CPL_ABORT_NO_RST;
273 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
274 }
275
276 static void send_abort_req(struct cxgbi_sock *csk)
277 {
278 struct cpl_abort_req *req;
279 struct sk_buff *skb = csk->cpl_abort_req;
280
281 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
282 return;
283 cxgbi_sock_set_state(csk, CTP_ABORTING);
284 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
285 cxgbi_sock_purge_write_queue(csk);
286
287 csk->cpl_abort_req = NULL;
288 req = (struct cpl_abort_req *)skb->head;
289 set_queue(skb, CPL_PRIORITY_DATA, csk);
290 req->cmd = CPL_ABORT_SEND_RST;
291 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
292 INIT_TP_WR(req, csk->tid);
293 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
294 req->rsvd0 = htonl(csk->snd_nxt);
295 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
296
297 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
298 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
299 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
300 req->rsvd1);
301
302 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
303 }
304
305 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
306 {
307 struct sk_buff *skb = csk->cpl_abort_rpl;
308 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
309
310 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
311 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
312 csk, csk->state, csk->flags, csk->tid, rst_status);
313
314 csk->cpl_abort_rpl = NULL;
315 set_queue(skb, CPL_PRIORITY_DATA, csk);
316 INIT_TP_WR(rpl, csk->tid);
317 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
318 rpl->cmd = rst_status;
319 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
320 }
321
322 /*
323 * CPL connection rx data ack: host ->
324 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
325 * credits sent.
326 */
327 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
328 {
329 struct sk_buff *skb;
330 struct cpl_rx_data_ack *req;
331
332 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
333 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
334 csk, csk->state, csk->flags, csk->tid, credits);
335
336 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
337 if (!skb) {
338 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
339 return 0;
340 }
341 req = (struct cpl_rx_data_ack *)skb->head;
342
343 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
344 INIT_TP_WR(req, csk->tid);
345 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
346 csk->tid));
347 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
348 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
349 return credits;
350 }
351
352 /*
353 * sgl_len - calculates the size of an SGL of the given capacity
354 * @n: the number of SGL entries
355 * Calculates the number of flits needed for a scatter/gather list that
356 * can hold the given number of entries.
357 */
358 static inline unsigned int sgl_len(unsigned int n)
359 {
360 n--;
361 return (3 * n) / 2 + (n & 1) + 2;
362 }
363
364 /*
365 * calc_tx_flits_ofld - calculate # of flits for an offload packet
366 * @skb: the packet
367 *
368 * Returns the number of flits needed for the given offload packet.
369 * These packets are already fully constructed and no additional headers
370 * will be added.
371 */
372 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
373 {
374 unsigned int flits, cnt;
375
376 if (is_ofld_imm(skb))
377 return DIV_ROUND_UP(skb->len, 8);
378 flits = skb_transport_offset(skb) / 8;
379 cnt = skb_shinfo(skb)->nr_frags;
380 if (skb->tail != skb->transport_header)
381 cnt++;
382 return flits + sgl_len(cnt);
383 }
384
385 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
386 {
387 struct sk_buff *skb;
388 struct fw_flowc_wr *flowc;
389 int flowclen, i;
390
391 flowclen = 80;
392 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
393 flowc = (struct fw_flowc_wr *)skb->head;
394 flowc->op_to_nparams =
395 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
396 flowc->flowid_len16 =
397 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
398 FW_WR_FLOWID(csk->tid));
399 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
400 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
401 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
402 flowc->mnemval[1].val = htonl(csk->tx_chan);
403 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
404 flowc->mnemval[2].val = htonl(csk->tx_chan);
405 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
406 flowc->mnemval[3].val = htonl(csk->rss_qid);
407 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
408 flowc->mnemval[4].val = htonl(csk->snd_nxt);
409 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
410 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
411 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
412 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
413 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
414 flowc->mnemval[7].val = htonl(csk->advmss);
415 flowc->mnemval[8].mnemonic = 0;
416 flowc->mnemval[8].val = 0;
417 for (i = 0; i < 9; i++) {
418 flowc->mnemval[i].r4[0] = 0;
419 flowc->mnemval[i].r4[1] = 0;
420 flowc->mnemval[i].r4[2] = 0;
421 }
422 set_queue(skb, CPL_PRIORITY_DATA, csk);
423
424 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
425 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
426 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
427 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
428 csk->advmss);
429
430 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
431 }
432
433 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
434 int dlen, int len, u32 credits, int compl)
435 {
436 struct fw_ofld_tx_data_wr *req;
437 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
438 unsigned int wr_ulp_mode = 0;
439
440 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
441
442 if (is_ofld_imm(skb)) {
443 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
444 FW_WR_COMPL(1) |
445 FW_WR_IMMDLEN(dlen));
446 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
447 FW_WR_LEN16(credits));
448 } else {
449 req->op_to_immdlen =
450 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
451 FW_WR_COMPL(1) |
452 FW_WR_IMMDLEN(0));
453 req->flowid_len16 =
454 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
455 FW_WR_LEN16(credits));
456 }
457 if (submode)
458 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
459 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
460 req->tunnel_to_proxy = htonl(wr_ulp_mode) |
461 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1);
462 req->plen = htonl(len);
463 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
464 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
465 }
466
467 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
468 {
469 kfree_skb(skb);
470 }
471
472 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
473 {
474 int total_size = 0;
475 struct sk_buff *skb;
476
477 if (unlikely(csk->state < CTP_ESTABLISHED ||
478 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
479 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
480 1 << CXGBI_DBG_PDU_TX,
481 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
482 csk, csk->state, csk->flags, csk->tid);
483 return 0;
484 }
485
486 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
487 int dlen = skb->len;
488 int len = skb->len;
489 unsigned int credits_needed;
490
491 skb_reset_transport_header(skb);
492 if (is_ofld_imm(skb))
493 credits_needed = DIV_ROUND_UP(dlen +
494 sizeof(struct fw_ofld_tx_data_wr), 16);
495 else
496 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
497 + sizeof(struct fw_ofld_tx_data_wr),
498 16);
499
500 if (csk->wr_cred < credits_needed) {
501 log_debug(1 << CXGBI_DBG_PDU_TX,
502 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
503 csk, skb->len, skb->data_len,
504 credits_needed, csk->wr_cred);
505 break;
506 }
507 __skb_unlink(skb, &csk->write_queue);
508 set_queue(skb, CPL_PRIORITY_DATA, csk);
509 skb->csum = credits_needed;
510 csk->wr_cred -= credits_needed;
511 csk->wr_una_cred += credits_needed;
512 cxgbi_sock_enqueue_wr(csk, skb);
513
514 log_debug(1 << CXGBI_DBG_PDU_TX,
515 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
516 csk, skb->len, skb->data_len, credits_needed,
517 csk->wr_cred, csk->wr_una_cred);
518
519 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
520 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
521 send_tx_flowc_wr(csk);
522 skb->csum += 5;
523 csk->wr_cred -= 5;
524 csk->wr_una_cred += 5;
525 }
526 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
527 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
528 req_completion);
529 csk->snd_nxt += len;
530 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
531 }
532 total_size += skb->truesize;
533 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
534
535 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
536 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
537 csk, csk->state, csk->flags, csk->tid, skb, len);
538
539 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
540 }
541 return total_size;
542 }
543
544 static inline void free_atid(struct cxgbi_sock *csk)
545 {
546 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
547
548 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
549 cxgb4_free_atid(lldi->tids, csk->atid);
550 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
551 cxgbi_sock_put(csk);
552 }
553 }
554
555 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
556 {
557 struct cxgbi_sock *csk;
558 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
559 unsigned short tcp_opt = ntohs(req->tcp_opt);
560 unsigned int tid = GET_TID(req);
561 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
562 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
563 struct tid_info *t = lldi->tids;
564 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
565
566 csk = lookup_atid(t, atid);
567 if (unlikely(!csk)) {
568 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
569 goto rel_skb;
570 }
571
572 if (csk->atid != atid) {
573 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
574 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
575 goto rel_skb;
576 }
577
578 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
579 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
580 csk, csk->state, csk->flags, tid, atid, rcv_isn);
581
582 cxgbi_sock_get(csk);
583 csk->tid = tid;
584 cxgb4_insert_tid(lldi->tids, csk, tid);
585 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
586
587 free_atid(csk);
588
589 spin_lock_bh(&csk->lock);
590 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
591 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
592 csk, csk->state, csk->flags, csk->tid);
593
594 if (csk->retry_timer.function) {
595 del_timer(&csk->retry_timer);
596 csk->retry_timer.function = NULL;
597 }
598
599 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
600 /*
601 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
602 * pass through opt0.
603 */
604 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
605 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
606
607 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
608 if (GET_TCPOPT_TSTAMP(tcp_opt))
609 csk->advmss -= 12;
610 if (csk->advmss < 128)
611 csk->advmss = 128;
612
613 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
614 "csk 0x%p, mss_idx %u, advmss %u.\n",
615 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
616
617 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
618
619 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
620 send_abort_req(csk);
621 else {
622 if (skb_queue_len(&csk->write_queue))
623 push_tx_frames(csk, 0);
624 cxgbi_conn_tx_open(csk);
625 }
626 spin_unlock_bh(&csk->lock);
627
628 rel_skb:
629 __kfree_skb(skb);
630 }
631
632 static int act_open_rpl_status_to_errno(int status)
633 {
634 switch (status) {
635 case CPL_ERR_CONN_RESET:
636 return -ECONNREFUSED;
637 case CPL_ERR_ARP_MISS:
638 return -EHOSTUNREACH;
639 case CPL_ERR_CONN_TIMEDOUT:
640 return -ETIMEDOUT;
641 case CPL_ERR_TCAM_FULL:
642 return -ENOMEM;
643 case CPL_ERR_CONN_EXIST:
644 return -EADDRINUSE;
645 default:
646 return -EIO;
647 }
648 }
649
650 static void csk_act_open_retry_timer(unsigned long data)
651 {
652 struct sk_buff *skb;
653 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
654
655 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
656 "csk 0x%p,%u,0x%lx,%u.\n",
657 csk, csk->state, csk->flags, csk->tid);
658
659 cxgbi_sock_get(csk);
660 spin_lock_bh(&csk->lock);
661 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
662 if (!skb)
663 cxgbi_sock_fail_act_open(csk, -ENOMEM);
664 else {
665 skb->sk = (struct sock *)csk;
666 t4_set_arp_err_handler(skb, csk,
667 cxgbi_sock_act_open_req_arp_failure);
668 send_act_open_req(csk, skb, csk->l2t);
669 }
670 spin_unlock_bh(&csk->lock);
671 cxgbi_sock_put(csk);
672 }
673
674 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
675 {
676 struct cxgbi_sock *csk;
677 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
678 unsigned int tid = GET_TID(rpl);
679 unsigned int atid =
680 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
681 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
682 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
683 struct tid_info *t = lldi->tids;
684
685 csk = lookup_atid(t, atid);
686 if (unlikely(!csk)) {
687 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
688 goto rel_skb;
689 }
690
691 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
692 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
693 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
694 atid, tid, status, csk, csk->state, csk->flags);
695
696 if (status == CPL_ERR_RTX_NEG_ADVICE)
697 goto rel_skb;
698
699 if (status && status != CPL_ERR_TCAM_FULL &&
700 status != CPL_ERR_CONN_EXIST &&
701 status != CPL_ERR_ARP_MISS)
702 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
703
704 cxgbi_sock_get(csk);
705 spin_lock_bh(&csk->lock);
706
707 if (status == CPL_ERR_CONN_EXIST &&
708 csk->retry_timer.function != csk_act_open_retry_timer) {
709 csk->retry_timer.function = csk_act_open_retry_timer;
710 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
711 } else
712 cxgbi_sock_fail_act_open(csk,
713 act_open_rpl_status_to_errno(status));
714
715 spin_unlock_bh(&csk->lock);
716 cxgbi_sock_put(csk);
717 rel_skb:
718 __kfree_skb(skb);
719 }
720
721 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
722 {
723 struct cxgbi_sock *csk;
724 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
725 unsigned int tid = GET_TID(req);
726 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
727 struct tid_info *t = lldi->tids;
728
729 csk = lookup_tid(t, tid);
730 if (unlikely(!csk)) {
731 pr_err("can't find connection for tid %u.\n", tid);
732 goto rel_skb;
733 }
734 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
735 "csk 0x%p,%u,0x%lx,%u.\n",
736 csk, csk->state, csk->flags, csk->tid);
737 cxgbi_sock_rcv_peer_close(csk);
738 rel_skb:
739 __kfree_skb(skb);
740 }
741
742 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
743 {
744 struct cxgbi_sock *csk;
745 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
746 unsigned int tid = GET_TID(rpl);
747 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
748 struct tid_info *t = lldi->tids;
749
750 csk = lookup_tid(t, tid);
751 if (unlikely(!csk)) {
752 pr_err("can't find connection for tid %u.\n", tid);
753 goto rel_skb;
754 }
755 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
756 "csk 0x%p,%u,0x%lx,%u.\n",
757 csk, csk->state, csk->flags, csk->tid);
758 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
759 rel_skb:
760 __kfree_skb(skb);
761 }
762
763 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
764 int *need_rst)
765 {
766 switch (abort_reason) {
767 case CPL_ERR_BAD_SYN: /* fall through */
768 case CPL_ERR_CONN_RESET:
769 return csk->state > CTP_ESTABLISHED ?
770 -EPIPE : -ECONNRESET;
771 case CPL_ERR_XMIT_TIMEDOUT:
772 case CPL_ERR_PERSIST_TIMEDOUT:
773 case CPL_ERR_FINWAIT2_TIMEDOUT:
774 case CPL_ERR_KEEPALIVE_TIMEDOUT:
775 return -ETIMEDOUT;
776 default:
777 return -EIO;
778 }
779 }
780
781 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
782 {
783 struct cxgbi_sock *csk;
784 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
785 unsigned int tid = GET_TID(req);
786 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
787 struct tid_info *t = lldi->tids;
788 int rst_status = CPL_ABORT_NO_RST;
789
790 csk = lookup_tid(t, tid);
791 if (unlikely(!csk)) {
792 pr_err("can't find connection for tid %u.\n", tid);
793 goto rel_skb;
794 }
795
796 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
797 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
798 csk, csk->state, csk->flags, csk->tid, req->status);
799
800 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
801 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
802 goto rel_skb;
803
804 cxgbi_sock_get(csk);
805 spin_lock_bh(&csk->lock);
806
807 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
808 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
809 cxgbi_sock_set_state(csk, CTP_ABORTING);
810 goto done;
811 }
812
813 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
814 send_abort_rpl(csk, rst_status);
815
816 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
817 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
818 cxgbi_sock_closed(csk);
819 }
820 done:
821 spin_unlock_bh(&csk->lock);
822 cxgbi_sock_put(csk);
823 rel_skb:
824 __kfree_skb(skb);
825 }
826
827 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
828 {
829 struct cxgbi_sock *csk;
830 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
831 unsigned int tid = GET_TID(rpl);
832 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
833 struct tid_info *t = lldi->tids;
834
835 csk = lookup_tid(t, tid);
836 if (!csk)
837 goto rel_skb;
838
839 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
840 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
841 rpl->status, csk, csk ? csk->state : 0,
842 csk ? csk->flags : 0UL);
843
844 if (rpl->status == CPL_ERR_ABORT_FAILED)
845 goto rel_skb;
846
847 cxgbi_sock_rcv_abort_rpl(csk);
848 rel_skb:
849 __kfree_skb(skb);
850 }
851
852 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
853 {
854 struct cxgbi_sock *csk;
855 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
856 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
857 unsigned int tid = GET_TID(cpl);
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 conn. for tid %u.\n", tid);
864 goto rel_skb;
865 }
866
867 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
868 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
869 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
870 pdu_len_ddp);
871
872 spin_lock_bh(&csk->lock);
873
874 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
875 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
876 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
877 csk, csk->state, csk->flags, csk->tid);
878 if (csk->state != CTP_ABORTING)
879 goto abort_conn;
880 else
881 goto discard;
882 }
883
884 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
885 cxgbi_skcb_flags(skb) = 0;
886
887 skb_reset_transport_header(skb);
888 __skb_pull(skb, sizeof(*cpl));
889 __pskb_trim(skb, ntohs(cpl->len));
890
891 if (!csk->skb_ulp_lhdr) {
892 unsigned char *bhs;
893 unsigned int hlen, dlen;
894
895 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
896 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
897 csk, csk->state, csk->flags, csk->tid, skb);
898 csk->skb_ulp_lhdr = skb;
899 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
900
901 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
902 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
903 csk->tid, cxgbi_skcb_tcp_seq(skb),
904 csk->rcv_nxt);
905 goto abort_conn;
906 }
907
908 bhs = skb->data;
909 hlen = ntohs(cpl->len);
910 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
911
912 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
913 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
914 "mismatch %u != %u + %u, seq 0x%x.\n",
915 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40,
916 hlen, dlen, cxgbi_skcb_tcp_seq(skb));
917 goto abort_conn;
918 }
919
920 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
921 if (dlen)
922 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
923 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
924
925 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
926 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
927 csk, skb, *bhs, hlen, dlen,
928 ntohl(*((unsigned int *)(bhs + 16))),
929 ntohl(*((unsigned int *)(bhs + 24))));
930
931 } else {
932 struct sk_buff *lskb = csk->skb_ulp_lhdr;
933
934 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
935 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
936 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
937 csk, csk->state, csk->flags, skb, lskb);
938 }
939
940 __skb_queue_tail(&csk->receive_queue, skb);
941 spin_unlock_bh(&csk->lock);
942 return;
943
944 abort_conn:
945 send_abort_req(csk);
946 discard:
947 spin_unlock_bh(&csk->lock);
948 rel_skb:
949 __kfree_skb(skb);
950 }
951
952 static void do_rx_data_ddp(struct cxgbi_device *cdev,
953 struct sk_buff *skb)
954 {
955 struct cxgbi_sock *csk;
956 struct sk_buff *lskb;
957 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
958 unsigned int tid = GET_TID(rpl);
959 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
960 struct tid_info *t = lldi->tids;
961 unsigned int status = ntohl(rpl->ddpvld);
962
963 csk = lookup_tid(t, tid);
964 if (unlikely(!csk)) {
965 pr_err("can't find connection for tid %u.\n", tid);
966 goto rel_skb;
967 }
968
969 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
970 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
971 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
972
973 spin_lock_bh(&csk->lock);
974
975 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
976 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
977 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
978 csk, csk->state, csk->flags, csk->tid);
979 if (csk->state != CTP_ABORTING)
980 goto abort_conn;
981 else
982 goto discard;
983 }
984
985 if (!csk->skb_ulp_lhdr) {
986 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
987 goto abort_conn;
988 }
989
990 lskb = csk->skb_ulp_lhdr;
991 csk->skb_ulp_lhdr = NULL;
992
993 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
994
995 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
996 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
997 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
998
999 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1000 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1001 csk, lskb, status, cxgbi_skcb_flags(lskb));
1002 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1003 }
1004 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1005 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1006 csk, lskb, status, cxgbi_skcb_flags(lskb));
1007 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1008 }
1009 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1010 log_debug(1 << CXGBI_DBG_PDU_RX,
1011 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1012 csk, lskb, status);
1013 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1014 }
1015 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1016 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1017 log_debug(1 << CXGBI_DBG_PDU_RX,
1018 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1019 csk, lskb, status);
1020 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1021 }
1022 log_debug(1 << CXGBI_DBG_PDU_RX,
1023 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1024 csk, lskb, cxgbi_skcb_flags(lskb));
1025
1026 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1027 cxgbi_conn_pdu_ready(csk);
1028 spin_unlock_bh(&csk->lock);
1029 goto rel_skb;
1030
1031 abort_conn:
1032 send_abort_req(csk);
1033 discard:
1034 spin_unlock_bh(&csk->lock);
1035 rel_skb:
1036 __kfree_skb(skb);
1037 }
1038
1039 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1040 {
1041 struct cxgbi_sock *csk;
1042 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1043 unsigned int tid = GET_TID(rpl);
1044 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1045 struct tid_info *t = lldi->tids;
1046
1047 csk = lookup_tid(t, tid);
1048 if (unlikely(!csk))
1049 pr_err("can't find connection for tid %u.\n", tid);
1050 else {
1051 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1052 "csk 0x%p,%u,0x%lx,%u.\n",
1053 csk, csk->state, csk->flags, csk->tid);
1054 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1055 rpl->seq_vld);
1056 }
1057 __kfree_skb(skb);
1058 }
1059
1060 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1061 {
1062 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1063 unsigned int tid = GET_TID(rpl);
1064 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1065 struct tid_info *t = lldi->tids;
1066 struct cxgbi_sock *csk;
1067
1068 csk = lookup_tid(t, tid);
1069 if (!csk)
1070 pr_err("can't find conn. for tid %u.\n", tid);
1071
1072 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1073 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1074 csk, csk->state, csk->flags, csk->tid, rpl->status);
1075
1076 if (rpl->status != CPL_ERR_NONE)
1077 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1078 csk, tid, rpl->status);
1079
1080 __kfree_skb(skb);
1081 }
1082
1083 static int alloc_cpls(struct cxgbi_sock *csk)
1084 {
1085 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1086 0, GFP_KERNEL);
1087 if (!csk->cpl_close)
1088 return -ENOMEM;
1089
1090 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1091 0, GFP_KERNEL);
1092 if (!csk->cpl_abort_req)
1093 goto free_cpls;
1094
1095 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1096 0, GFP_KERNEL);
1097 if (!csk->cpl_abort_rpl)
1098 goto free_cpls;
1099 return 0;
1100
1101 free_cpls:
1102 cxgbi_sock_free_cpl_skbs(csk);
1103 return -ENOMEM;
1104 }
1105
1106 static inline void l2t_put(struct cxgbi_sock *csk)
1107 {
1108 if (csk->l2t) {
1109 cxgb4_l2t_release(csk->l2t);
1110 csk->l2t = NULL;
1111 cxgbi_sock_put(csk);
1112 }
1113 }
1114
1115 static void release_offload_resources(struct cxgbi_sock *csk)
1116 {
1117 struct cxgb4_lld_info *lldi;
1118
1119 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1120 "csk 0x%p,%u,0x%lx,%u.\n",
1121 csk, csk->state, csk->flags, csk->tid);
1122
1123 cxgbi_sock_free_cpl_skbs(csk);
1124 if (csk->wr_cred != csk->wr_max_cred) {
1125 cxgbi_sock_purge_wr_queue(csk);
1126 cxgbi_sock_reset_wr_list(csk);
1127 }
1128
1129 l2t_put(csk);
1130 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1131 free_atid(csk);
1132 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1133 lldi = cxgbi_cdev_priv(csk->cdev);
1134 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1135 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1136 cxgbi_sock_put(csk);
1137 }
1138 csk->dst = NULL;
1139 csk->cdev = NULL;
1140 }
1141
1142 static int init_act_open(struct cxgbi_sock *csk)
1143 {
1144 struct cxgbi_device *cdev = csk->cdev;
1145 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1146 struct net_device *ndev = cdev->ports[csk->port_id];
1147 struct port_info *pi = netdev_priv(ndev);
1148 struct sk_buff *skb = NULL;
1149 unsigned int step;
1150
1151 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1152 "csk 0x%p,%u,0x%lx,%u.\n",
1153 csk, csk->state, csk->flags, csk->tid);
1154
1155 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1156 if (csk->atid < 0) {
1157 pr_err("%s, NO atid available.\n", ndev->name);
1158 return -EINVAL;
1159 }
1160 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1161 cxgbi_sock_get(csk);
1162
1163 csk->l2t = cxgb4_l2t_get(lldi->l2t, dst_get_neighbour(csk->dst), ndev, 0);
1164 if (!csk->l2t) {
1165 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1166 goto rel_resource;
1167 }
1168 cxgbi_sock_get(csk);
1169
1170 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
1171 if (!skb)
1172 goto rel_resource;
1173 skb->sk = (struct sock *)csk;
1174 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1175
1176 if (!csk->mtu)
1177 csk->mtu = dst_mtu(csk->dst);
1178 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1179 csk->tx_chan = cxgb4_port_chan(ndev);
1180 /* SMT two entries per row */
1181 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1182 step = lldi->ntxq / lldi->nchan;
1183 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1184 step = lldi->nrxq / lldi->nchan;
1185 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1186 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1187 csk->wr_una_cred = 0;
1188 cxgbi_sock_reset_wr_list(csk);
1189 csk->err = 0;
1190 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1191 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1192 csk, pi->port_id, ndev->name, csk->tx_chan,
1193 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1194 csk->smac_idx);
1195
1196 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1197 send_act_open_req(csk, skb, csk->l2t);
1198 return 0;
1199
1200 rel_resource:
1201 if (skb)
1202 __kfree_skb(skb);
1203 return -EINVAL;
1204 }
1205
1206 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1207 [CPL_ACT_ESTABLISH] = do_act_establish,
1208 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1209 [CPL_PEER_CLOSE] = do_peer_close,
1210 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1211 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1212 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1213 [CPL_FW4_ACK] = do_fw4_ack,
1214 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1215 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1216 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1217 };
1218
1219 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1220 {
1221 int rc;
1222
1223 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1224 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1225
1226 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1227 cxgb4i_max_connect);
1228 if (rc < 0)
1229 return rc;
1230
1231 cdev->csk_release_offload_resources = release_offload_resources;
1232 cdev->csk_push_tx_frames = push_tx_frames;
1233 cdev->csk_send_abort_req = send_abort_req;
1234 cdev->csk_send_close_req = send_close_req;
1235 cdev->csk_send_rx_credits = send_rx_credits;
1236 cdev->csk_alloc_cpls = alloc_cpls;
1237 cdev->csk_init_act_open = init_act_open;
1238
1239 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1240 return 0;
1241 }
1242
1243 /*
1244 * functions to program the pagepod in h/w
1245 */
1246 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1247 static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
1248 unsigned int wr_len, unsigned int dlen,
1249 unsigned int pm_addr)
1250 {
1251 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1252
1253 INIT_ULPTX_WR(req, wr_len, 0, 0);
1254 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23));
1255 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1256 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1257 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1258
1259 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1260 idata->len = htonl(dlen);
1261 }
1262
1263 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1264 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1265 unsigned int npods,
1266 struct cxgbi_gather_list *gl,
1267 unsigned int gl_pidx)
1268 {
1269 struct cxgbi_ddp_info *ddp = cdev->ddp;
1270 struct sk_buff *skb;
1271 struct ulp_mem_io *req;
1272 struct ulptx_idata *idata;
1273 struct cxgbi_pagepod *ppod;
1274 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1275 unsigned int dlen = PPOD_SIZE * npods;
1276 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1277 sizeof(struct ulptx_idata) + dlen, 16);
1278 unsigned int i;
1279
1280 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1281 if (!skb) {
1282 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1283 cdev, idx, npods);
1284 return -ENOMEM;
1285 }
1286 req = (struct ulp_mem_io *)skb->head;
1287 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1288
1289 ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr);
1290 idata = (struct ulptx_idata *)(req + 1);
1291 ppod = (struct cxgbi_pagepod *)(idata + 1);
1292
1293 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1294 if (!hdr && !gl)
1295 cxgbi_ddp_ppod_clear(ppod);
1296 else
1297 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1298 }
1299
1300 cxgb4_ofld_send(cdev->ports[port_id], skb);
1301 return 0;
1302 }
1303
1304 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1305 unsigned int idx, unsigned int npods,
1306 struct cxgbi_gather_list *gl)
1307 {
1308 unsigned int i, cnt;
1309 int err = 0;
1310
1311 for (i = 0; i < npods; i += cnt, idx += cnt) {
1312 cnt = npods - i;
1313 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1314 cnt = ULPMEM_IDATA_MAX_NPPODS;
1315 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1316 idx, cnt, gl, 4 * i);
1317 if (err < 0)
1318 break;
1319 }
1320 return err;
1321 }
1322
1323 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1324 unsigned int idx, unsigned int npods)
1325 {
1326 unsigned int i, cnt;
1327 int err;
1328
1329 for (i = 0; i < npods; i += cnt, idx += cnt) {
1330 cnt = npods - i;
1331 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1332 cnt = ULPMEM_IDATA_MAX_NPPODS;
1333 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1334 idx, cnt, NULL, 0);
1335 if (err < 0)
1336 break;
1337 }
1338 }
1339
1340 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1341 int pg_idx, bool reply)
1342 {
1343 struct sk_buff *skb;
1344 struct cpl_set_tcb_field *req;
1345
1346 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1347 return 0;
1348
1349 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1350 if (!skb)
1351 return -ENOMEM;
1352
1353 /* set up ulp page size */
1354 req = (struct cpl_set_tcb_field *)skb->head;
1355 INIT_TP_WR(req, csk->tid);
1356 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1357 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1358 req->word_cookie = htons(0);
1359 req->mask = cpu_to_be64(0x3 << 8);
1360 req->val = cpu_to_be64(pg_idx << 8);
1361 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1362
1363 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1364 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1365
1366 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1367 return 0;
1368 }
1369
1370 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1371 int hcrc, int dcrc, int reply)
1372 {
1373 struct sk_buff *skb;
1374 struct cpl_set_tcb_field *req;
1375
1376 if (!hcrc && !dcrc)
1377 return 0;
1378
1379 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1380 if (!skb)
1381 return -ENOMEM;
1382
1383 csk->hcrc_len = (hcrc ? 4 : 0);
1384 csk->dcrc_len = (dcrc ? 4 : 0);
1385 /* set up ulp submode */
1386 req = (struct cpl_set_tcb_field *)skb->head;
1387 INIT_TP_WR(req, tid);
1388 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1389 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1390 req->word_cookie = htons(0);
1391 req->mask = cpu_to_be64(0x3 << 4);
1392 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1393 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1394 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1395
1396 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1397 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1398
1399 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1400 return 0;
1401 }
1402
1403 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1404 {
1405 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1406 struct cxgbi_ddp_info *ddp = cdev->ddp;
1407 unsigned int tagmask, pgsz_factor[4];
1408 int err;
1409
1410 if (ddp) {
1411 kref_get(&ddp->refcnt);
1412 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1413 cdev, cdev->ddp);
1414 return -EALREADY;
1415 }
1416
1417 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1418 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1419 lldi->iscsi_iolen, lldi->iscsi_iolen);
1420 if (err < 0)
1421 return err;
1422
1423 ddp = cdev->ddp;
1424
1425 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1426 cxgbi_ddp_page_size_factor(pgsz_factor);
1427 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1428
1429 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1430 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1431 cdev->csk_ddp_set = ddp_set_map;
1432 cdev->csk_ddp_clear = ddp_clear_map;
1433
1434 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1435 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1436 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1437 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1438 " %u/%u.\n",
1439 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1440 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1441 ddp->max_rxsz, lldi->iscsi_iolen);
1442 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1443 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1444 ddp->max_rxsz);
1445 return 0;
1446 }
1447
1448 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1449 {
1450 struct cxgbi_device *cdev;
1451 struct port_info *pi;
1452 int i, rc;
1453
1454 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1455 if (!cdev) {
1456 pr_info("t4 device 0x%p, register failed.\n", lldi);
1457 return NULL;
1458 }
1459 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1460 cdev, lldi->adapter_type, lldi->nports,
1461 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1462 lldi->nrxq, lldi->wr_cred);
1463 for (i = 0; i < lldi->nrxq; i++)
1464 log_debug(1 << CXGBI_DBG_DEV,
1465 "t4 0x%p, rxq id #%d: %u.\n",
1466 cdev, i, lldi->rxq_ids[i]);
1467
1468 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1469 cdev->flags = CXGBI_FLAG_DEV_T4;
1470 cdev->pdev = lldi->pdev;
1471 cdev->ports = lldi->ports;
1472 cdev->nports = lldi->nports;
1473 cdev->mtus = lldi->mtus;
1474 cdev->nmtus = NMTUS;
1475 cdev->snd_win = cxgb4i_snd_win;
1476 cdev->rcv_win = cxgb4i_rcv_win;
1477 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1478 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1479 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1480 cdev->itp = &cxgb4i_iscsi_transport;
1481
1482 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1483 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1484 cdev, lldi->ports[0]->name, cdev->pfvf);
1485
1486 rc = cxgb4i_ddp_init(cdev);
1487 if (rc) {
1488 pr_info("t4 0x%p ddp init failed.\n", cdev);
1489 goto err_out;
1490 }
1491 rc = cxgb4i_ofld_init(cdev);
1492 if (rc) {
1493 pr_info("t4 0x%p ofld init failed.\n", cdev);
1494 goto err_out;
1495 }
1496
1497 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1498 &cxgb4i_host_template, cxgb4i_stt);
1499 if (rc)
1500 goto err_out;
1501
1502 for (i = 0; i < cdev->nports; i++) {
1503 pi = netdev_priv(lldi->ports[i]);
1504 cdev->hbas[i]->port_id = pi->port_id;
1505 }
1506 return cdev;
1507
1508 err_out:
1509 cxgbi_device_unregister(cdev);
1510 return ERR_PTR(-ENOMEM);
1511 }
1512
1513 #define RX_PULL_LEN 128
1514 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1515 const struct pkt_gl *pgl)
1516 {
1517 const struct cpl_act_establish *rpl;
1518 struct sk_buff *skb;
1519 unsigned int opc;
1520 struct cxgbi_device *cdev = handle;
1521
1522 if (pgl == NULL) {
1523 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1524
1525 skb = alloc_wr(len, 0, GFP_ATOMIC);
1526 if (!skb)
1527 goto nomem;
1528 skb_copy_to_linear_data(skb, &rsp[1], len);
1529 } else {
1530 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1531 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1532 pgl->va, be64_to_cpu(*rsp),
1533 be64_to_cpu(*(u64 *)pgl->va),
1534 pgl->tot_len);
1535 return 0;
1536 }
1537 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1538 if (unlikely(!skb))
1539 goto nomem;
1540 }
1541
1542 rpl = (struct cpl_act_establish *)skb->data;
1543 opc = rpl->ot.opcode;
1544 log_debug(1 << CXGBI_DBG_TOE,
1545 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1546 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1547 if (cxgb4i_cplhandlers[opc])
1548 cxgb4i_cplhandlers[opc](cdev, skb);
1549 else {
1550 pr_err("No handler for opcode 0x%x.\n", opc);
1551 __kfree_skb(skb);
1552 }
1553 return 0;
1554 nomem:
1555 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1556 return 1;
1557 }
1558
1559 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1560 {
1561 struct cxgbi_device *cdev = handle;
1562
1563 switch (state) {
1564 case CXGB4_STATE_UP:
1565 pr_info("cdev 0x%p, UP.\n", cdev);
1566 /* re-initialize */
1567 break;
1568 case CXGB4_STATE_START_RECOVERY:
1569 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1570 /* close all connections */
1571 break;
1572 case CXGB4_STATE_DOWN:
1573 pr_info("cdev 0x%p, DOWN.\n", cdev);
1574 break;
1575 case CXGB4_STATE_DETACH:
1576 pr_info("cdev 0x%p, DETACH.\n", cdev);
1577 break;
1578 default:
1579 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1580 break;
1581 }
1582 return 0;
1583 }
1584
1585 static int __init cxgb4i_init_module(void)
1586 {
1587 int rc;
1588
1589 printk(KERN_INFO "%s", version);
1590
1591 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1592 if (rc < 0)
1593 return rc;
1594 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1595 return 0;
1596 }
1597
1598 static void __exit cxgb4i_exit_module(void)
1599 {
1600 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1601 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1602 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1603 }
1604
1605 module_init(cxgb4i_init_module);
1606 module_exit(cxgb4i_exit_module);
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