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i2c-eg20t: change timeout value 50msec to 1000msec
[zen-stable.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
blob5a4a3bfc60cf891d6902f35e8baca702bdc68fe0
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/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
23 #include "t4_msg.h"
24 #include "cxgb4.h"
25 #include "cxgb4_uld.h"
26 #include "t4fw_api.h"
27 #include "l2t.h"
28 #include "cxgb4i.h"
29
30 static unsigned int dbg_level;
31
32 #include "../libcxgbi.h"
33
34 #define DRV_MODULE_NAME "cxgb4i"
35 #define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver"
36 #define DRV_MODULE_VERSION "0.9.1"
37 #define DRV_MODULE_RELDATE "Aug. 2010"
38
39 static char version[] =
40 DRV_MODULE_DESC " " DRV_MODULE_NAME
41 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
42
43 MODULE_AUTHOR("Chelsio Communications, Inc.");
44 MODULE_DESCRIPTION(DRV_MODULE_DESC);
45 MODULE_VERSION(DRV_MODULE_VERSION);
46 MODULE_LICENSE("GPL");
47
48 module_param(dbg_level, uint, 0644);
49 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
50
51 static int cxgb4i_rcv_win = 256 * 1024;
52 module_param(cxgb4i_rcv_win, int, 0644);
53 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
54
55 static int cxgb4i_snd_win = 128 * 1024;
56 module_param(cxgb4i_snd_win, int, 0644);
57 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
58
59 static int cxgb4i_rx_credit_thres = 10 * 1024;
60 module_param(cxgb4i_rx_credit_thres, int, 0644);
61 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
62 "RX credits return threshold in bytes (default=10KB)");
63
64 static unsigned int cxgb4i_max_connect = (8 * 1024);
65 module_param(cxgb4i_max_connect, uint, 0644);
66 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
67
68 static unsigned short cxgb4i_sport_base = 20000;
69 module_param(cxgb4i_sport_base, ushort, 0644);
70 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
71
72 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
73
74 static void *t4_uld_add(const struct cxgb4_lld_info *);
75 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
76 static int t4_uld_state_change(void *, enum cxgb4_state state);
77
78 static 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
85 static 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
103 static 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 |
108 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
109 .attr_is_visible = cxgbi_attr_is_visible,
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,
122 .get_conn_param = iscsi_conn_get_param,
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 */
137 .get_ep_param = cxgbi_get_ep_param,
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
145 static 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
157 static 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
163 static 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 */
172 static 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
178 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
179 struct l2t_entry *e)
180 {
181 struct cpl_act_open_req *req;
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 |
198 (1 << 20) | (1 << 22) |
199 RSS_QUEUE(csk->rss_qid);
200
201 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
202 req = (struct cpl_act_open_req *)skb->head;
203
204 INIT_TP_WR(req, 0);
205 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
206 qid_atid));
207 req->local_port = csk->saddr.sin_port;
208 req->peer_port = csk->daddr.sin_port;
209 req->local_ip = csk->saddr.sin_addr.s_addr;
210 req->peer_ip = csk->daddr.sin_addr.s_addr;
211 req->opt0 = cpu_to_be64(opt0);
212 req->params = 0;
213 req->opt2 = cpu_to_be32(opt2);
214
215 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
216 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
217 csk, &req->local_ip, ntohs(req->local_port),
218 &req->peer_ip, ntohs(req->peer_port),
219 csk->atid, csk->rss_qid);
220
221 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
222 }
223
224 static void send_close_req(struct cxgbi_sock *csk)
225 {
226 struct sk_buff *skb = csk->cpl_close;
227 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
228 unsigned int tid = csk->tid;
229
230 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
231 "csk 0x%p,%u,0x%lx, tid %u.\n",
232 csk, csk->state, csk->flags, csk->tid);
233 csk->cpl_close = NULL;
234 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
235 INIT_TP_WR(req, tid);
236 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
237 req->rsvd = 0;
238
239 cxgbi_sock_skb_entail(csk, skb);
240 if (csk->state >= CTP_ESTABLISHED)
241 push_tx_frames(csk, 1);
242 }
243
244 static void abort_arp_failure(void *handle, struct sk_buff *skb)
245 {
246 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
247 struct cpl_abort_req *req;
248
249 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
250 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
251 csk, csk->state, csk->flags, csk->tid);
252 req = (struct cpl_abort_req *)skb->data;
253 req->cmd = CPL_ABORT_NO_RST;
254 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
255 }
256
257 static void send_abort_req(struct cxgbi_sock *csk)
258 {
259 struct cpl_abort_req *req;
260 struct sk_buff *skb = csk->cpl_abort_req;
261
262 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
263 return;
264 cxgbi_sock_set_state(csk, CTP_ABORTING);
265 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
266 cxgbi_sock_purge_write_queue(csk);
267
268 csk->cpl_abort_req = NULL;
269 req = (struct cpl_abort_req *)skb->head;
270 set_queue(skb, CPL_PRIORITY_DATA, csk);
271 req->cmd = CPL_ABORT_SEND_RST;
272 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
273 INIT_TP_WR(req, csk->tid);
274 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
275 req->rsvd0 = htonl(csk->snd_nxt);
276 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
277
278 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
279 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
280 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
281 req->rsvd1);
282
283 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
284 }
285
286 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
287 {
288 struct sk_buff *skb = csk->cpl_abort_rpl;
289 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
290
291 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
292 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
293 csk, csk->state, csk->flags, csk->tid, rst_status);
294
295 csk->cpl_abort_rpl = NULL;
296 set_queue(skb, CPL_PRIORITY_DATA, csk);
297 INIT_TP_WR(rpl, csk->tid);
298 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
299 rpl->cmd = rst_status;
300 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
301 }
302
303 /*
304 * CPL connection rx data ack: host ->
305 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
306 * credits sent.
307 */
308 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
309 {
310 struct sk_buff *skb;
311 struct cpl_rx_data_ack *req;
312
313 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
314 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
315 csk, csk->state, csk->flags, csk->tid, credits);
316
317 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
318 if (!skb) {
319 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
320 return 0;
321 }
322 req = (struct cpl_rx_data_ack *)skb->head;
323
324 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
325 INIT_TP_WR(req, csk->tid);
326 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
327 csk->tid));
328 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
329 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
330 return credits;
331 }
332
333 /*
334 * sgl_len - calculates the size of an SGL of the given capacity
335 * @n: the number of SGL entries
336 * Calculates the number of flits needed for a scatter/gather list that
337 * can hold the given number of entries.
338 */
339 static inline unsigned int sgl_len(unsigned int n)
340 {
341 n--;
342 return (3 * n) / 2 + (n & 1) + 2;
343 }
344
345 /*
346 * calc_tx_flits_ofld - calculate # of flits for an offload packet
347 * @skb: the packet
348 *
349 * Returns the number of flits needed for the given offload packet.
350 * These packets are already fully constructed and no additional headers
351 * will be added.
352 */
353 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
354 {
355 unsigned int flits, cnt;
356
357 if (is_ofld_imm(skb))
358 return DIV_ROUND_UP(skb->len, 8);
359 flits = skb_transport_offset(skb) / 8;
360 cnt = skb_shinfo(skb)->nr_frags;
361 if (skb->tail != skb->transport_header)
362 cnt++;
363 return flits + sgl_len(cnt);
364 }
365
366 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
367 {
368 struct sk_buff *skb;
369 struct fw_flowc_wr *flowc;
370 int flowclen, i;
371
372 flowclen = 80;
373 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
374 flowc = (struct fw_flowc_wr *)skb->head;
375 flowc->op_to_nparams =
376 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
377 flowc->flowid_len16 =
378 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
379 FW_WR_FLOWID(csk->tid));
380 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
381 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
382 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
383 flowc->mnemval[1].val = htonl(csk->tx_chan);
384 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
385 flowc->mnemval[2].val = htonl(csk->tx_chan);
386 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
387 flowc->mnemval[3].val = htonl(csk->rss_qid);
388 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
389 flowc->mnemval[4].val = htonl(csk->snd_nxt);
390 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
391 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
392 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
393 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
394 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
395 flowc->mnemval[7].val = htonl(csk->advmss);
396 flowc->mnemval[8].mnemonic = 0;
397 flowc->mnemval[8].val = 0;
398 for (i = 0; i < 9; i++) {
399 flowc->mnemval[i].r4[0] = 0;
400 flowc->mnemval[i].r4[1] = 0;
401 flowc->mnemval[i].r4[2] = 0;
402 }
403 set_queue(skb, CPL_PRIORITY_DATA, csk);
404
405 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
406 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
407 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
408 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
409 csk->advmss);
410
411 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
412 }
413
414 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
415 int dlen, int len, u32 credits, int compl)
416 {
417 struct fw_ofld_tx_data_wr *req;
418 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
419 unsigned int wr_ulp_mode = 0;
420
421 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
422
423 if (is_ofld_imm(skb)) {
424 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
425 FW_WR_COMPL(1) |
426 FW_WR_IMMDLEN(dlen));
427 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
428 FW_WR_LEN16(credits));
429 } else {
430 req->op_to_immdlen =
431 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
432 FW_WR_COMPL(1) |
433 FW_WR_IMMDLEN(0));
434 req->flowid_len16 =
435 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
436 FW_WR_LEN16(credits));
437 }
438 if (submode)
439 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
440 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
441 req->tunnel_to_proxy = htonl(wr_ulp_mode) |
442 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1);
443 req->plen = htonl(len);
444 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
445 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
446 }
447
448 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
449 {
450 kfree_skb(skb);
451 }
452
453 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
454 {
455 int total_size = 0;
456 struct sk_buff *skb;
457
458 if (unlikely(csk->state < CTP_ESTABLISHED ||
459 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
460 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
461 1 << CXGBI_DBG_PDU_TX,
462 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
463 csk, csk->state, csk->flags, csk->tid);
464 return 0;
465 }
466
467 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
468 int dlen = skb->len;
469 int len = skb->len;
470 unsigned int credits_needed;
471
472 skb_reset_transport_header(skb);
473 if (is_ofld_imm(skb))
474 credits_needed = DIV_ROUND_UP(dlen +
475 sizeof(struct fw_ofld_tx_data_wr), 16);
476 else
477 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
478 + sizeof(struct fw_ofld_tx_data_wr),
479 16);
480
481 if (csk->wr_cred < credits_needed) {
482 log_debug(1 << CXGBI_DBG_PDU_TX,
483 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
484 csk, skb->len, skb->data_len,
485 credits_needed, csk->wr_cred);
486 break;
487 }
488 __skb_unlink(skb, &csk->write_queue);
489 set_queue(skb, CPL_PRIORITY_DATA, csk);
490 skb->csum = credits_needed;
491 csk->wr_cred -= credits_needed;
492 csk->wr_una_cred += credits_needed;
493 cxgbi_sock_enqueue_wr(csk, skb);
494
495 log_debug(1 << CXGBI_DBG_PDU_TX,
496 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
497 csk, skb->len, skb->data_len, credits_needed,
498 csk->wr_cred, csk->wr_una_cred);
499
500 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
501 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
502 send_tx_flowc_wr(csk);
503 skb->csum += 5;
504 csk->wr_cred -= 5;
505 csk->wr_una_cred += 5;
506 }
507 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
508 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
509 req_completion);
510 csk->snd_nxt += len;
511 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
512 }
513 total_size += skb->truesize;
514 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
515
516 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
517 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
518 csk, csk->state, csk->flags, csk->tid, skb, len);
519
520 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
521 }
522 return total_size;
523 }
524
525 static inline void free_atid(struct cxgbi_sock *csk)
526 {
527 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
528
529 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
530 cxgb4_free_atid(lldi->tids, csk->atid);
531 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
532 cxgbi_sock_put(csk);
533 }
534 }
535
536 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
537 {
538 struct cxgbi_sock *csk;
539 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
540 unsigned short tcp_opt = ntohs(req->tcp_opt);
541 unsigned int tid = GET_TID(req);
542 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
543 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
544 struct tid_info *t = lldi->tids;
545 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
546
547 csk = lookup_atid(t, atid);
548 if (unlikely(!csk)) {
549 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
550 goto rel_skb;
551 }
552
553 if (csk->atid != atid) {
554 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
555 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
556 goto rel_skb;
557 }
558
559 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
560 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
561 csk, csk->state, csk->flags, tid, atid, rcv_isn);
562
563 cxgbi_sock_get(csk);
564 csk->tid = tid;
565 cxgb4_insert_tid(lldi->tids, csk, tid);
566 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
567
568 free_atid(csk);
569
570 spin_lock_bh(&csk->lock);
571 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
572 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
573 csk, csk->state, csk->flags, csk->tid);
574
575 if (csk->retry_timer.function) {
576 del_timer(&csk->retry_timer);
577 csk->retry_timer.function = NULL;
578 }
579
580 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
581 /*
582 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
583 * pass through opt0.
584 */
585 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
586 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
587
588 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
589 if (GET_TCPOPT_TSTAMP(tcp_opt))
590 csk->advmss -= 12;
591 if (csk->advmss < 128)
592 csk->advmss = 128;
593
594 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
595 "csk 0x%p, mss_idx %u, advmss %u.\n",
596 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
597
598 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
599
600 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
601 send_abort_req(csk);
602 else {
603 if (skb_queue_len(&csk->write_queue))
604 push_tx_frames(csk, 0);
605 cxgbi_conn_tx_open(csk);
606 }
607 spin_unlock_bh(&csk->lock);
608
609 rel_skb:
610 __kfree_skb(skb);
611 }
612
613 static int act_open_rpl_status_to_errno(int status)
614 {
615 switch (status) {
616 case CPL_ERR_CONN_RESET:
617 return -ECONNREFUSED;
618 case CPL_ERR_ARP_MISS:
619 return -EHOSTUNREACH;
620 case CPL_ERR_CONN_TIMEDOUT:
621 return -ETIMEDOUT;
622 case CPL_ERR_TCAM_FULL:
623 return -ENOMEM;
624 case CPL_ERR_CONN_EXIST:
625 return -EADDRINUSE;
626 default:
627 return -EIO;
628 }
629 }
630
631 static void csk_act_open_retry_timer(unsigned long data)
632 {
633 struct sk_buff *skb;
634 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
635
636 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
637 "csk 0x%p,%u,0x%lx,%u.\n",
638 csk, csk->state, csk->flags, csk->tid);
639
640 cxgbi_sock_get(csk);
641 spin_lock_bh(&csk->lock);
642 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
643 if (!skb)
644 cxgbi_sock_fail_act_open(csk, -ENOMEM);
645 else {
646 skb->sk = (struct sock *)csk;
647 t4_set_arp_err_handler(skb, csk,
648 cxgbi_sock_act_open_req_arp_failure);
649 send_act_open_req(csk, skb, csk->l2t);
650 }
651 spin_unlock_bh(&csk->lock);
652 cxgbi_sock_put(csk);
653 }
654
655 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
656 {
657 struct cxgbi_sock *csk;
658 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
659 unsigned int tid = GET_TID(rpl);
660 unsigned int atid =
661 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
662 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
663 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
664 struct tid_info *t = lldi->tids;
665
666 csk = lookup_atid(t, atid);
667 if (unlikely(!csk)) {
668 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
669 goto rel_skb;
670 }
671
672 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
673 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
674 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
675 atid, tid, status, csk, csk->state, csk->flags);
676
677 if (status == CPL_ERR_RTX_NEG_ADVICE)
678 goto rel_skb;
679
680 if (status && status != CPL_ERR_TCAM_FULL &&
681 status != CPL_ERR_CONN_EXIST &&
682 status != CPL_ERR_ARP_MISS)
683 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
684
685 cxgbi_sock_get(csk);
686 spin_lock_bh(&csk->lock);
687
688 if (status == CPL_ERR_CONN_EXIST &&
689 csk->retry_timer.function != csk_act_open_retry_timer) {
690 csk->retry_timer.function = csk_act_open_retry_timer;
691 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
692 } else
693 cxgbi_sock_fail_act_open(csk,
694 act_open_rpl_status_to_errno(status));
695
696 spin_unlock_bh(&csk->lock);
697 cxgbi_sock_put(csk);
698 rel_skb:
699 __kfree_skb(skb);
700 }
701
702 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
703 {
704 struct cxgbi_sock *csk;
705 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
706 unsigned int tid = GET_TID(req);
707 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
708 struct tid_info *t = lldi->tids;
709
710 csk = lookup_tid(t, tid);
711 if (unlikely(!csk)) {
712 pr_err("can't find connection for tid %u.\n", tid);
713 goto rel_skb;
714 }
715 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
716 "csk 0x%p,%u,0x%lx,%u.\n",
717 csk, csk->state, csk->flags, csk->tid);
718 cxgbi_sock_rcv_peer_close(csk);
719 rel_skb:
720 __kfree_skb(skb);
721 }
722
723 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
724 {
725 struct cxgbi_sock *csk;
726 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
727 unsigned int tid = GET_TID(rpl);
728 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
729 struct tid_info *t = lldi->tids;
730
731 csk = lookup_tid(t, tid);
732 if (unlikely(!csk)) {
733 pr_err("can't find connection for tid %u.\n", tid);
734 goto rel_skb;
735 }
736 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
737 "csk 0x%p,%u,0x%lx,%u.\n",
738 csk, csk->state, csk->flags, csk->tid);
739 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
740 rel_skb:
741 __kfree_skb(skb);
742 }
743
744 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
745 int *need_rst)
746 {
747 switch (abort_reason) {
748 case CPL_ERR_BAD_SYN: /* fall through */
749 case CPL_ERR_CONN_RESET:
750 return csk->state > CTP_ESTABLISHED ?
751 -EPIPE : -ECONNRESET;
752 case CPL_ERR_XMIT_TIMEDOUT:
753 case CPL_ERR_PERSIST_TIMEDOUT:
754 case CPL_ERR_FINWAIT2_TIMEDOUT:
755 case CPL_ERR_KEEPALIVE_TIMEDOUT:
756 return -ETIMEDOUT;
757 default:
758 return -EIO;
759 }
760 }
761
762 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
763 {
764 struct cxgbi_sock *csk;
765 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
766 unsigned int tid = GET_TID(req);
767 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
768 struct tid_info *t = lldi->tids;
769 int rst_status = CPL_ABORT_NO_RST;
770
771 csk = lookup_tid(t, tid);
772 if (unlikely(!csk)) {
773 pr_err("can't find connection for tid %u.\n", tid);
774 goto rel_skb;
775 }
776
777 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
778 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
779 csk, csk->state, csk->flags, csk->tid, req->status);
780
781 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
782 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
783 goto rel_skb;
784
785 cxgbi_sock_get(csk);
786 spin_lock_bh(&csk->lock);
787
788 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
789 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
790 cxgbi_sock_set_state(csk, CTP_ABORTING);
791 goto done;
792 }
793
794 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
795 send_abort_rpl(csk, rst_status);
796
797 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
798 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
799 cxgbi_sock_closed(csk);
800 }
801 done:
802 spin_unlock_bh(&csk->lock);
803 cxgbi_sock_put(csk);
804 rel_skb:
805 __kfree_skb(skb);
806 }
807
808 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
809 {
810 struct cxgbi_sock *csk;
811 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
812 unsigned int tid = GET_TID(rpl);
813 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
814 struct tid_info *t = lldi->tids;
815
816 csk = lookup_tid(t, tid);
817 if (!csk)
818 goto rel_skb;
819
820 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
821 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
822 rpl->status, csk, csk ? csk->state : 0,
823 csk ? csk->flags : 0UL);
824
825 if (rpl->status == CPL_ERR_ABORT_FAILED)
826 goto rel_skb;
827
828 cxgbi_sock_rcv_abort_rpl(csk);
829 rel_skb:
830 __kfree_skb(skb);
831 }
832
833 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
834 {
835 struct cxgbi_sock *csk;
836 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
837 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
838 unsigned int tid = GET_TID(cpl);
839 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
840 struct tid_info *t = lldi->tids;
841
842 csk = lookup_tid(t, tid);
843 if (unlikely(!csk)) {
844 pr_err("can't find conn. for tid %u.\n", tid);
845 goto rel_skb;
846 }
847
848 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
849 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
850 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
851 pdu_len_ddp);
852
853 spin_lock_bh(&csk->lock);
854
855 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
856 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
857 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
858 csk, csk->state, csk->flags, csk->tid);
859 if (csk->state != CTP_ABORTING)
860 goto abort_conn;
861 else
862 goto discard;
863 }
864
865 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
866 cxgbi_skcb_flags(skb) = 0;
867
868 skb_reset_transport_header(skb);
869 __skb_pull(skb, sizeof(*cpl));
870 __pskb_trim(skb, ntohs(cpl->len));
871
872 if (!csk->skb_ulp_lhdr) {
873 unsigned char *bhs;
874 unsigned int hlen, dlen;
875
876 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
877 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
878 csk, csk->state, csk->flags, csk->tid, skb);
879 csk->skb_ulp_lhdr = skb;
880 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
881
882 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
883 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
884 csk->tid, cxgbi_skcb_tcp_seq(skb),
885 csk->rcv_nxt);
886 goto abort_conn;
887 }
888
889 bhs = skb->data;
890 hlen = ntohs(cpl->len);
891 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
892
893 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
894 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
895 "mismatch %u != %u + %u, seq 0x%x.\n",
896 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40,
897 hlen, dlen, cxgbi_skcb_tcp_seq(skb));
898 goto abort_conn;
899 }
900
901 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
902 if (dlen)
903 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
904 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
905
906 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
907 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
908 csk, skb, *bhs, hlen, dlen,
909 ntohl(*((unsigned int *)(bhs + 16))),
910 ntohl(*((unsigned int *)(bhs + 24))));
911
912 } else {
913 struct sk_buff *lskb = csk->skb_ulp_lhdr;
914
915 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
916 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
917 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
918 csk, csk->state, csk->flags, skb, lskb);
919 }
920
921 __skb_queue_tail(&csk->receive_queue, skb);
922 spin_unlock_bh(&csk->lock);
923 return;
924
925 abort_conn:
926 send_abort_req(csk);
927 discard:
928 spin_unlock_bh(&csk->lock);
929 rel_skb:
930 __kfree_skb(skb);
931 }
932
933 static void do_rx_data_ddp(struct cxgbi_device *cdev,
934 struct sk_buff *skb)
935 {
936 struct cxgbi_sock *csk;
937 struct sk_buff *lskb;
938 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
939 unsigned int tid = GET_TID(rpl);
940 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
941 struct tid_info *t = lldi->tids;
942 unsigned int status = ntohl(rpl->ddpvld);
943
944 csk = lookup_tid(t, tid);
945 if (unlikely(!csk)) {
946 pr_err("can't find connection for tid %u.\n", tid);
947 goto rel_skb;
948 }
949
950 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
951 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
952 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
953
954 spin_lock_bh(&csk->lock);
955
956 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
957 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
958 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
959 csk, csk->state, csk->flags, csk->tid);
960 if (csk->state != CTP_ABORTING)
961 goto abort_conn;
962 else
963 goto discard;
964 }
965
966 if (!csk->skb_ulp_lhdr) {
967 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
968 goto abort_conn;
969 }
970
971 lskb = csk->skb_ulp_lhdr;
972 csk->skb_ulp_lhdr = NULL;
973
974 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
975
976 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
977 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
978 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
979
980 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
981 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
982 csk, lskb, status, cxgbi_skcb_flags(lskb));
983 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
984 }
985 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
986 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
987 csk, lskb, status, cxgbi_skcb_flags(lskb));
988 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
989 }
990 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
991 log_debug(1 << CXGBI_DBG_PDU_RX,
992 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
993 csk, lskb, status);
994 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
995 }
996 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
997 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
998 log_debug(1 << CXGBI_DBG_PDU_RX,
999 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1000 csk, lskb, status);
1001 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1002 }
1003 log_debug(1 << CXGBI_DBG_PDU_RX,
1004 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1005 csk, lskb, cxgbi_skcb_flags(lskb));
1006
1007 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1008 cxgbi_conn_pdu_ready(csk);
1009 spin_unlock_bh(&csk->lock);
1010 goto rel_skb;
1011
1012 abort_conn:
1013 send_abort_req(csk);
1014 discard:
1015 spin_unlock_bh(&csk->lock);
1016 rel_skb:
1017 __kfree_skb(skb);
1018 }
1019
1020 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1021 {
1022 struct cxgbi_sock *csk;
1023 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1024 unsigned int tid = GET_TID(rpl);
1025 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1026 struct tid_info *t = lldi->tids;
1027
1028 csk = lookup_tid(t, tid);
1029 if (unlikely(!csk))
1030 pr_err("can't find connection for tid %u.\n", tid);
1031 else {
1032 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1033 "csk 0x%p,%u,0x%lx,%u.\n",
1034 csk, csk->state, csk->flags, csk->tid);
1035 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1036 rpl->seq_vld);
1037 }
1038 __kfree_skb(skb);
1039 }
1040
1041 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1042 {
1043 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1044 unsigned int tid = GET_TID(rpl);
1045 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1046 struct tid_info *t = lldi->tids;
1047 struct cxgbi_sock *csk;
1048
1049 csk = lookup_tid(t, tid);
1050 if (!csk)
1051 pr_err("can't find conn. for tid %u.\n", tid);
1052
1053 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1054 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1055 csk, csk->state, csk->flags, csk->tid, rpl->status);
1056
1057 if (rpl->status != CPL_ERR_NONE)
1058 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1059 csk, tid, rpl->status);
1060
1061 __kfree_skb(skb);
1062 }
1063
1064 static int alloc_cpls(struct cxgbi_sock *csk)
1065 {
1066 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1067 0, GFP_KERNEL);
1068 if (!csk->cpl_close)
1069 return -ENOMEM;
1070
1071 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1072 0, GFP_KERNEL);
1073 if (!csk->cpl_abort_req)
1074 goto free_cpls;
1075
1076 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1077 0, GFP_KERNEL);
1078 if (!csk->cpl_abort_rpl)
1079 goto free_cpls;
1080 return 0;
1081
1082 free_cpls:
1083 cxgbi_sock_free_cpl_skbs(csk);
1084 return -ENOMEM;
1085 }
1086
1087 static inline void l2t_put(struct cxgbi_sock *csk)
1088 {
1089 if (csk->l2t) {
1090 cxgb4_l2t_release(csk->l2t);
1091 csk->l2t = NULL;
1092 cxgbi_sock_put(csk);
1093 }
1094 }
1095
1096 static void release_offload_resources(struct cxgbi_sock *csk)
1097 {
1098 struct cxgb4_lld_info *lldi;
1099
1100 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1101 "csk 0x%p,%u,0x%lx,%u.\n",
1102 csk, csk->state, csk->flags, csk->tid);
1103
1104 cxgbi_sock_free_cpl_skbs(csk);
1105 if (csk->wr_cred != csk->wr_max_cred) {
1106 cxgbi_sock_purge_wr_queue(csk);
1107 cxgbi_sock_reset_wr_list(csk);
1108 }
1109
1110 l2t_put(csk);
1111 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1112 free_atid(csk);
1113 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1114 lldi = cxgbi_cdev_priv(csk->cdev);
1115 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1116 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1117 cxgbi_sock_put(csk);
1118 }
1119 csk->dst = NULL;
1120 csk->cdev = NULL;
1121 }
1122
1123 static int init_act_open(struct cxgbi_sock *csk)
1124 {
1125 struct cxgbi_device *cdev = csk->cdev;
1126 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1127 struct net_device *ndev = cdev->ports[csk->port_id];
1128 struct port_info *pi = netdev_priv(ndev);
1129 struct sk_buff *skb = NULL;
1130 struct neighbour *n;
1131 unsigned int step;
1132
1133 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1134 "csk 0x%p,%u,0x%lx,%u.\n",
1135 csk, csk->state, csk->flags, csk->tid);
1136
1137 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1138 if (csk->atid < 0) {
1139 pr_err("%s, NO atid available.\n", ndev->name);
1140 return -EINVAL;
1141 }
1142 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1143 cxgbi_sock_get(csk);
1144
1145 n = dst_get_neighbour_noref(csk->dst);
1146 if (!n) {
1147 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1148 goto rel_resource;
1149 }
1150 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1151 if (!csk->l2t) {
1152 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1153 goto rel_resource;
1154 }
1155 cxgbi_sock_get(csk);
1156
1157 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
1158 if (!skb)
1159 goto rel_resource;
1160 skb->sk = (struct sock *)csk;
1161 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1162
1163 if (!csk->mtu)
1164 csk->mtu = dst_mtu(csk->dst);
1165 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1166 csk->tx_chan = cxgb4_port_chan(ndev);
1167 /* SMT two entries per row */
1168 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1169 step = lldi->ntxq / lldi->nchan;
1170 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1171 step = lldi->nrxq / lldi->nchan;
1172 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1173 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1174 csk->wr_una_cred = 0;
1175 cxgbi_sock_reset_wr_list(csk);
1176 csk->err = 0;
1177 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1178 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1179 csk, pi->port_id, ndev->name, csk->tx_chan,
1180 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1181 csk->smac_idx);
1182
1183 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1184 send_act_open_req(csk, skb, csk->l2t);
1185 return 0;
1186
1187 rel_resource:
1188 if (skb)
1189 __kfree_skb(skb);
1190 return -EINVAL;
1191 }
1192
1193 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1194 [CPL_ACT_ESTABLISH] = do_act_establish,
1195 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1196 [CPL_PEER_CLOSE] = do_peer_close,
1197 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1198 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1199 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1200 [CPL_FW4_ACK] = do_fw4_ack,
1201 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1202 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1203 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1204 };
1205
1206 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1207 {
1208 int rc;
1209
1210 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1211 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1212
1213 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1214 cxgb4i_max_connect);
1215 if (rc < 0)
1216 return rc;
1217
1218 cdev->csk_release_offload_resources = release_offload_resources;
1219 cdev->csk_push_tx_frames = push_tx_frames;
1220 cdev->csk_send_abort_req = send_abort_req;
1221 cdev->csk_send_close_req = send_close_req;
1222 cdev->csk_send_rx_credits = send_rx_credits;
1223 cdev->csk_alloc_cpls = alloc_cpls;
1224 cdev->csk_init_act_open = init_act_open;
1225
1226 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1227 return 0;
1228 }
1229
1230 /*
1231 * functions to program the pagepod in h/w
1232 */
1233 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1234 static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
1235 unsigned int wr_len, unsigned int dlen,
1236 unsigned int pm_addr)
1237 {
1238 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1239
1240 INIT_ULPTX_WR(req, wr_len, 0, 0);
1241 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23));
1242 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1243 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1244 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1245
1246 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1247 idata->len = htonl(dlen);
1248 }
1249
1250 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1251 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1252 unsigned int npods,
1253 struct cxgbi_gather_list *gl,
1254 unsigned int gl_pidx)
1255 {
1256 struct cxgbi_ddp_info *ddp = cdev->ddp;
1257 struct sk_buff *skb;
1258 struct ulp_mem_io *req;
1259 struct ulptx_idata *idata;
1260 struct cxgbi_pagepod *ppod;
1261 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1262 unsigned int dlen = PPOD_SIZE * npods;
1263 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1264 sizeof(struct ulptx_idata) + dlen, 16);
1265 unsigned int i;
1266
1267 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1268 if (!skb) {
1269 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1270 cdev, idx, npods);
1271 return -ENOMEM;
1272 }
1273 req = (struct ulp_mem_io *)skb->head;
1274 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1275
1276 ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr);
1277 idata = (struct ulptx_idata *)(req + 1);
1278 ppod = (struct cxgbi_pagepod *)(idata + 1);
1279
1280 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1281 if (!hdr && !gl)
1282 cxgbi_ddp_ppod_clear(ppod);
1283 else
1284 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1285 }
1286
1287 cxgb4_ofld_send(cdev->ports[port_id], skb);
1288 return 0;
1289 }
1290
1291 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1292 unsigned int idx, unsigned int npods,
1293 struct cxgbi_gather_list *gl)
1294 {
1295 unsigned int i, cnt;
1296 int err = 0;
1297
1298 for (i = 0; i < npods; i += cnt, idx += cnt) {
1299 cnt = npods - i;
1300 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1301 cnt = ULPMEM_IDATA_MAX_NPPODS;
1302 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1303 idx, cnt, gl, 4 * i);
1304 if (err < 0)
1305 break;
1306 }
1307 return err;
1308 }
1309
1310 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1311 unsigned int idx, unsigned int npods)
1312 {
1313 unsigned int i, cnt;
1314 int err;
1315
1316 for (i = 0; i < npods; i += cnt, idx += cnt) {
1317 cnt = npods - i;
1318 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1319 cnt = ULPMEM_IDATA_MAX_NPPODS;
1320 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1321 idx, cnt, NULL, 0);
1322 if (err < 0)
1323 break;
1324 }
1325 }
1326
1327 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1328 int pg_idx, bool reply)
1329 {
1330 struct sk_buff *skb;
1331 struct cpl_set_tcb_field *req;
1332
1333 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1334 return 0;
1335
1336 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1337 if (!skb)
1338 return -ENOMEM;
1339
1340 /* set up ulp page size */
1341 req = (struct cpl_set_tcb_field *)skb->head;
1342 INIT_TP_WR(req, csk->tid);
1343 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1344 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1345 req->word_cookie = htons(0);
1346 req->mask = cpu_to_be64(0x3 << 8);
1347 req->val = cpu_to_be64(pg_idx << 8);
1348 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1349
1350 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1351 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1352
1353 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1354 return 0;
1355 }
1356
1357 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1358 int hcrc, int dcrc, int reply)
1359 {
1360 struct sk_buff *skb;
1361 struct cpl_set_tcb_field *req;
1362
1363 if (!hcrc && !dcrc)
1364 return 0;
1365
1366 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1367 if (!skb)
1368 return -ENOMEM;
1369
1370 csk->hcrc_len = (hcrc ? 4 : 0);
1371 csk->dcrc_len = (dcrc ? 4 : 0);
1372 /* set up ulp submode */
1373 req = (struct cpl_set_tcb_field *)skb->head;
1374 INIT_TP_WR(req, tid);
1375 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1376 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1377 req->word_cookie = htons(0);
1378 req->mask = cpu_to_be64(0x3 << 4);
1379 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1380 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1381 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1382
1383 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1384 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1385
1386 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1387 return 0;
1388 }
1389
1390 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1391 {
1392 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1393 struct cxgbi_ddp_info *ddp = cdev->ddp;
1394 unsigned int tagmask, pgsz_factor[4];
1395 int err;
1396
1397 if (ddp) {
1398 kref_get(&ddp->refcnt);
1399 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1400 cdev, cdev->ddp);
1401 return -EALREADY;
1402 }
1403
1404 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1405 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1406 lldi->iscsi_iolen, lldi->iscsi_iolen);
1407 if (err < 0)
1408 return err;
1409
1410 ddp = cdev->ddp;
1411
1412 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1413 cxgbi_ddp_page_size_factor(pgsz_factor);
1414 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1415
1416 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1417 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1418 cdev->csk_ddp_set = ddp_set_map;
1419 cdev->csk_ddp_clear = ddp_clear_map;
1420
1421 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1422 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1423 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1424 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1425 " %u/%u.\n",
1426 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1427 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1428 ddp->max_rxsz, lldi->iscsi_iolen);
1429 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1430 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1431 ddp->max_rxsz);
1432 return 0;
1433 }
1434
1435 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1436 {
1437 struct cxgbi_device *cdev;
1438 struct port_info *pi;
1439 int i, rc;
1440
1441 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1442 if (!cdev) {
1443 pr_info("t4 device 0x%p, register failed.\n", lldi);
1444 return NULL;
1445 }
1446 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1447 cdev, lldi->adapter_type, lldi->nports,
1448 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1449 lldi->nrxq, lldi->wr_cred);
1450 for (i = 0; i < lldi->nrxq; i++)
1451 log_debug(1 << CXGBI_DBG_DEV,
1452 "t4 0x%p, rxq id #%d: %u.\n",
1453 cdev, i, lldi->rxq_ids[i]);
1454
1455 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1456 cdev->flags = CXGBI_FLAG_DEV_T4;
1457 cdev->pdev = lldi->pdev;
1458 cdev->ports = lldi->ports;
1459 cdev->nports = lldi->nports;
1460 cdev->mtus = lldi->mtus;
1461 cdev->nmtus = NMTUS;
1462 cdev->snd_win = cxgb4i_snd_win;
1463 cdev->rcv_win = cxgb4i_rcv_win;
1464 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1465 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1466 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1467 cdev->itp = &cxgb4i_iscsi_transport;
1468
1469 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1470 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1471 cdev, lldi->ports[0]->name, cdev->pfvf);
1472
1473 rc = cxgb4i_ddp_init(cdev);
1474 if (rc) {
1475 pr_info("t4 0x%p ddp init failed.\n", cdev);
1476 goto err_out;
1477 }
1478 rc = cxgb4i_ofld_init(cdev);
1479 if (rc) {
1480 pr_info("t4 0x%p ofld init failed.\n", cdev);
1481 goto err_out;
1482 }
1483
1484 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1485 &cxgb4i_host_template, cxgb4i_stt);
1486 if (rc)
1487 goto err_out;
1488
1489 for (i = 0; i < cdev->nports; i++) {
1490 pi = netdev_priv(lldi->ports[i]);
1491 cdev->hbas[i]->port_id = pi->port_id;
1492 }
1493 return cdev;
1494
1495 err_out:
1496 cxgbi_device_unregister(cdev);
1497 return ERR_PTR(-ENOMEM);
1498 }
1499
1500 #define RX_PULL_LEN 128
1501 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1502 const struct pkt_gl *pgl)
1503 {
1504 const struct cpl_act_establish *rpl;
1505 struct sk_buff *skb;
1506 unsigned int opc;
1507 struct cxgbi_device *cdev = handle;
1508
1509 if (pgl == NULL) {
1510 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1511
1512 skb = alloc_wr(len, 0, GFP_ATOMIC);
1513 if (!skb)
1514 goto nomem;
1515 skb_copy_to_linear_data(skb, &rsp[1], len);
1516 } else {
1517 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1518 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1519 pgl->va, be64_to_cpu(*rsp),
1520 be64_to_cpu(*(u64 *)pgl->va),
1521 pgl->tot_len);
1522 return 0;
1523 }
1524 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1525 if (unlikely(!skb))
1526 goto nomem;
1527 }
1528
1529 rpl = (struct cpl_act_establish *)skb->data;
1530 opc = rpl->ot.opcode;
1531 log_debug(1 << CXGBI_DBG_TOE,
1532 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1533 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1534 if (cxgb4i_cplhandlers[opc])
1535 cxgb4i_cplhandlers[opc](cdev, skb);
1536 else {
1537 pr_err("No handler for opcode 0x%x.\n", opc);
1538 __kfree_skb(skb);
1539 }
1540 return 0;
1541 nomem:
1542 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1543 return 1;
1544 }
1545
1546 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1547 {
1548 struct cxgbi_device *cdev = handle;
1549
1550 switch (state) {
1551 case CXGB4_STATE_UP:
1552 pr_info("cdev 0x%p, UP.\n", cdev);
1553 /* re-initialize */
1554 break;
1555 case CXGB4_STATE_START_RECOVERY:
1556 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1557 /* close all connections */
1558 break;
1559 case CXGB4_STATE_DOWN:
1560 pr_info("cdev 0x%p, DOWN.\n", cdev);
1561 break;
1562 case CXGB4_STATE_DETACH:
1563 pr_info("cdev 0x%p, DETACH.\n", cdev);
1564 break;
1565 default:
1566 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1567 break;
1568 }
1569 return 0;
1570 }
1571
1572 static int __init cxgb4i_init_module(void)
1573 {
1574 int rc;
1575
1576 printk(KERN_INFO "%s", version);
1577
1578 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1579 if (rc < 0)
1580 return rc;
1581 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1582 return 0;
1583 }
1584
1585 static void __exit cxgb4i_exit_module(void)
1586 {
1587 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1588 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1589 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1590 }
1591
1592 module_init(cxgb4i_init_module);
1593 module_exit(cxgb4i_exit_module);