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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
blob31c79bde6976af4a347fdfe0a8775cc3cd3e6b0a
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 .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH |
110 ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN |
111 ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T |
112 ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST |
113 ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN |
114 ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL |
115 ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
116 ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT |
117 ISCSI_PERSISTENT_ADDRESS |
118 ISCSI_TARGET_NAME | ISCSI_TPGT |
119 ISCSI_USERNAME | ISCSI_PASSWORD |
120 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
121 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
122 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
123 ISCSI_PING_TMO | ISCSI_RECV_TMO |
124 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
125 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
126 ISCSI_HOST_INITIATOR_NAME |
127 ISCSI_HOST_NETDEV_NAME,
128 .get_host_param = cxgbi_get_host_param,
129 .set_host_param = cxgbi_set_host_param,
130 /* session management */
131 .create_session = cxgbi_create_session,
132 .destroy_session = cxgbi_destroy_session,
133 .get_session_param = iscsi_session_get_param,
134 /* connection management */
135 .create_conn = cxgbi_create_conn,
136 .bind_conn = cxgbi_bind_conn,
137 .destroy_conn = iscsi_tcp_conn_teardown,
138 .start_conn = iscsi_conn_start,
139 .stop_conn = iscsi_conn_stop,
140 .get_conn_param = iscsi_conn_get_param,
141 .set_param = cxgbi_set_conn_param,
142 .get_stats = cxgbi_get_conn_stats,
143 /* pdu xmit req from user space */
144 .send_pdu = iscsi_conn_send_pdu,
145 /* task */
146 .init_task = iscsi_tcp_task_init,
147 .xmit_task = iscsi_tcp_task_xmit,
148 .cleanup_task = cxgbi_cleanup_task,
149 /* pdu */
150 .alloc_pdu = cxgbi_conn_alloc_pdu,
151 .init_pdu = cxgbi_conn_init_pdu,
152 .xmit_pdu = cxgbi_conn_xmit_pdu,
153 .parse_pdu_itt = cxgbi_parse_pdu_itt,
154 /* TCP connect/disconnect */
155 .get_ep_param = cxgbi_get_ep_param,
156 .ep_connect = cxgbi_ep_connect,
157 .ep_poll = cxgbi_ep_poll,
158 .ep_disconnect = cxgbi_ep_disconnect,
159 /* Error recovery timeout call */
160 .session_recovery_timedout = iscsi_session_recovery_timedout,
161 };
162
163 static struct scsi_transport_template *cxgb4i_stt;
164
165 /*
166 * CPL (Chelsio Protocol Language) defines a message passing interface between
167 * the host driver and Chelsio asic.
168 * The section below implments CPLs that related to iscsi tcp connection
169 * open/close/abort and data send/receive.
170 */
171 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
172 #define RCV_BUFSIZ_MASK 0x3FFU
173 #define MAX_IMM_TX_PKT_LEN 128
174
175 static inline void set_queue(struct sk_buff *skb, unsigned int queue,
176 const struct cxgbi_sock *csk)
177 {
178 skb->queue_mapping = queue;
179 }
180
181 static int push_tx_frames(struct cxgbi_sock *, int);
182
183 /*
184 * is_ofld_imm - check whether a packet can be sent as immediate data
185 * @skb: the packet
186 *
187 * Returns true if a packet can be sent as an offload WR with immediate
188 * data. We currently use the same limit as for Ethernet packets.
189 */
190 static inline int is_ofld_imm(const struct sk_buff *skb)
191 {
192 return skb->len <= (MAX_IMM_TX_PKT_LEN -
193 sizeof(struct fw_ofld_tx_data_wr));
194 }
195
196 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
197 struct l2t_entry *e)
198 {
199 struct cpl_act_open_req *req;
200 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
201 unsigned long long opt0;
202 unsigned int opt2;
203 unsigned int qid_atid = ((unsigned int)csk->atid) |
204 (((unsigned int)csk->rss_qid) << 14);
205
206 opt0 = KEEP_ALIVE(1) |
207 WND_SCALE(wscale) |
208 MSS_IDX(csk->mss_idx) |
209 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
210 TX_CHAN(csk->tx_chan) |
211 SMAC_SEL(csk->smac_idx) |
212 ULP_MODE(ULP_MODE_ISCSI) |
213 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
214 opt2 = RX_CHANNEL(0) |
215 RSS_QUEUE_VALID |
216 (1 << 20) | (1 << 22) |
217 RSS_QUEUE(csk->rss_qid);
218
219 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
220 req = (struct cpl_act_open_req *)skb->head;
221
222 INIT_TP_WR(req, 0);
223 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
224 qid_atid));
225 req->local_port = csk->saddr.sin_port;
226 req->peer_port = csk->daddr.sin_port;
227 req->local_ip = csk->saddr.sin_addr.s_addr;
228 req->peer_ip = csk->daddr.sin_addr.s_addr;
229 req->opt0 = cpu_to_be64(opt0);
230 req->params = 0;
231 req->opt2 = cpu_to_be32(opt2);
232
233 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
234 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
235 csk, &req->local_ip, ntohs(req->local_port),
236 &req->peer_ip, ntohs(req->peer_port),
237 csk->atid, csk->rss_qid);
238
239 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
240 }
241
242 static void send_close_req(struct cxgbi_sock *csk)
243 {
244 struct sk_buff *skb = csk->cpl_close;
245 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
246 unsigned int tid = csk->tid;
247
248 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
249 "csk 0x%p,%u,0x%lx, tid %u.\n",
250 csk, csk->state, csk->flags, csk->tid);
251 csk->cpl_close = NULL;
252 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
253 INIT_TP_WR(req, tid);
254 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
255 req->rsvd = 0;
256
257 cxgbi_sock_skb_entail(csk, skb);
258 if (csk->state >= CTP_ESTABLISHED)
259 push_tx_frames(csk, 1);
260 }
261
262 static void abort_arp_failure(void *handle, struct sk_buff *skb)
263 {
264 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
265 struct cpl_abort_req *req;
266
267 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
268 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
269 csk, csk->state, csk->flags, csk->tid);
270 req = (struct cpl_abort_req *)skb->data;
271 req->cmd = CPL_ABORT_NO_RST;
272 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
273 }
274
275 static void send_abort_req(struct cxgbi_sock *csk)
276 {
277 struct cpl_abort_req *req;
278 struct sk_buff *skb = csk->cpl_abort_req;
279
280 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
281 return;
282 cxgbi_sock_set_state(csk, CTP_ABORTING);
283 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
284 cxgbi_sock_purge_write_queue(csk);
285
286 csk->cpl_abort_req = NULL;
287 req = (struct cpl_abort_req *)skb->head;
288 set_queue(skb, CPL_PRIORITY_DATA, csk);
289 req->cmd = CPL_ABORT_SEND_RST;
290 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
291 INIT_TP_WR(req, csk->tid);
292 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
293 req->rsvd0 = htonl(csk->snd_nxt);
294 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
295
296 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
297 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
298 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
299 req->rsvd1);
300
301 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
302 }
303
304 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
305 {
306 struct sk_buff *skb = csk->cpl_abort_rpl;
307 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
308
309 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
310 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
311 csk, csk->state, csk->flags, csk->tid, rst_status);
312
313 csk->cpl_abort_rpl = NULL;
314 set_queue(skb, CPL_PRIORITY_DATA, csk);
315 INIT_TP_WR(rpl, csk->tid);
316 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
317 rpl->cmd = rst_status;
318 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
319 }
320
321 /*
322 * CPL connection rx data ack: host ->
323 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
324 * credits sent.
325 */
326 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
327 {
328 struct sk_buff *skb;
329 struct cpl_rx_data_ack *req;
330
331 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
332 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
333 csk, csk->state, csk->flags, csk->tid, credits);
334
335 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
336 if (!skb) {
337 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
338 return 0;
339 }
340 req = (struct cpl_rx_data_ack *)skb->head;
341
342 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
343 INIT_TP_WR(req, csk->tid);
344 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
345 csk->tid));
346 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
347 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
348 return credits;
349 }
350
351 /*
352 * sgl_len - calculates the size of an SGL of the given capacity
353 * @n: the number of SGL entries
354 * Calculates the number of flits needed for a scatter/gather list that
355 * can hold the given number of entries.
356 */
357 static inline unsigned int sgl_len(unsigned int n)
358 {
359 n--;
360 return (3 * n) / 2 + (n & 1) + 2;
361 }
362
363 /*
364 * calc_tx_flits_ofld - calculate # of flits for an offload packet
365 * @skb: the packet
366 *
367 * Returns the number of flits needed for the given offload packet.
368 * These packets are already fully constructed and no additional headers
369 * will be added.
370 */
371 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
372 {
373 unsigned int flits, cnt;
374
375 if (is_ofld_imm(skb))
376 return DIV_ROUND_UP(skb->len, 8);
377 flits = skb_transport_offset(skb) / 8;
378 cnt = skb_shinfo(skb)->nr_frags;
379 if (skb->tail != skb->transport_header)
380 cnt++;
381 return flits + sgl_len(cnt);
382 }
383
384 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
385 {
386 struct sk_buff *skb;
387 struct fw_flowc_wr *flowc;
388 int flowclen, i;
389
390 flowclen = 80;
391 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
392 flowc = (struct fw_flowc_wr *)skb->head;
393 flowc->op_to_nparams =
394 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
395 flowc->flowid_len16 =
396 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
397 FW_WR_FLOWID(csk->tid));
398 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
399 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
400 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
401 flowc->mnemval[1].val = htonl(csk->tx_chan);
402 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
403 flowc->mnemval[2].val = htonl(csk->tx_chan);
404 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
405 flowc->mnemval[3].val = htonl(csk->rss_qid);
406 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
407 flowc->mnemval[4].val = htonl(csk->snd_nxt);
408 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
409 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
410 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
411 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
412 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
413 flowc->mnemval[7].val = htonl(csk->advmss);
414 flowc->mnemval[8].mnemonic = 0;
415 flowc->mnemval[8].val = 0;
416 for (i = 0; i < 9; i++) {
417 flowc->mnemval[i].r4[0] = 0;
418 flowc->mnemval[i].r4[1] = 0;
419 flowc->mnemval[i].r4[2] = 0;
420 }
421 set_queue(skb, CPL_PRIORITY_DATA, csk);
422
423 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
424 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
425 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
426 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
427 csk->advmss);
428
429 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
430 }
431
432 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
433 int dlen, int len, u32 credits, int compl)
434 {
435 struct fw_ofld_tx_data_wr *req;
436 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
437 unsigned int wr_ulp_mode = 0;
438
439 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
440
441 if (is_ofld_imm(skb)) {
442 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
443 FW_WR_COMPL(1) |
444 FW_WR_IMMDLEN(dlen));
445 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
446 FW_WR_LEN16(credits));
447 } else {
448 req->op_to_immdlen =
449 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
450 FW_WR_COMPL(1) |
451 FW_WR_IMMDLEN(0));
452 req->flowid_len16 =
453 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
454 FW_WR_LEN16(credits));
455 }
456 if (submode)
457 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
458 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
459 req->tunnel_to_proxy = htonl(wr_ulp_mode) |
460 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1);
461 req->plen = htonl(len);
462 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
463 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
464 }
465
466 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
467 {
468 kfree_skb(skb);
469 }
470
471 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
472 {
473 int total_size = 0;
474 struct sk_buff *skb;
475
476 if (unlikely(csk->state < CTP_ESTABLISHED ||
477 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
478 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
479 1 << CXGBI_DBG_PDU_TX,
480 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
481 csk, csk->state, csk->flags, csk->tid);
482 return 0;
483 }
484
485 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
486 int dlen = skb->len;
487 int len = skb->len;
488 unsigned int credits_needed;
489
490 skb_reset_transport_header(skb);
491 if (is_ofld_imm(skb))
492 credits_needed = DIV_ROUND_UP(dlen +
493 sizeof(struct fw_ofld_tx_data_wr), 16);
494 else
495 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
496 + sizeof(struct fw_ofld_tx_data_wr),
497 16);
498
499 if (csk->wr_cred < credits_needed) {
500 log_debug(1 << CXGBI_DBG_PDU_TX,
501 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
502 csk, skb->len, skb->data_len,
503 credits_needed, csk->wr_cred);
504 break;
505 }
506 __skb_unlink(skb, &csk->write_queue);
507 set_queue(skb, CPL_PRIORITY_DATA, csk);
508 skb->csum = credits_needed;
509 csk->wr_cred -= credits_needed;
510 csk->wr_una_cred += credits_needed;
511 cxgbi_sock_enqueue_wr(csk, skb);
512
513 log_debug(1 << CXGBI_DBG_PDU_TX,
514 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
515 csk, skb->len, skb->data_len, credits_needed,
516 csk->wr_cred, csk->wr_una_cred);
517
518 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
519 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
520 send_tx_flowc_wr(csk);
521 skb->csum += 5;
522 csk->wr_cred -= 5;
523 csk->wr_una_cred += 5;
524 }
525 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
526 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
527 req_completion);
528 csk->snd_nxt += len;
529 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
530 }
531 total_size += skb->truesize;
532 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
533
534 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
535 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
536 csk, csk->state, csk->flags, csk->tid, skb, len);
537
538 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
539 }
540 return total_size;
541 }
542
543 static inline void free_atid(struct cxgbi_sock *csk)
544 {
545 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
546
547 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
548 cxgb4_free_atid(lldi->tids, csk->atid);
549 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
550 cxgbi_sock_put(csk);
551 }
552 }
553
554 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
555 {
556 struct cxgbi_sock *csk;
557 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
558 unsigned short tcp_opt = ntohs(req->tcp_opt);
559 unsigned int tid = GET_TID(req);
560 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
561 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
562 struct tid_info *t = lldi->tids;
563 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
564
565 csk = lookup_atid(t, atid);
566 if (unlikely(!csk)) {
567 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
568 goto rel_skb;
569 }
570
571 if (csk->atid != atid) {
572 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
573 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
574 goto rel_skb;
575 }
576
577 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
578 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
579 csk, csk->state, csk->flags, tid, atid, rcv_isn);
580
581 cxgbi_sock_get(csk);
582 csk->tid = tid;
583 cxgb4_insert_tid(lldi->tids, csk, tid);
584 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
585
586 free_atid(csk);
587
588 spin_lock_bh(&csk->lock);
589 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
590 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
591 csk, csk->state, csk->flags, csk->tid);
592
593 if (csk->retry_timer.function) {
594 del_timer(&csk->retry_timer);
595 csk->retry_timer.function = NULL;
596 }
597
598 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
599 /*
600 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
601 * pass through opt0.
602 */
603 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
604 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
605
606 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
607 if (GET_TCPOPT_TSTAMP(tcp_opt))
608 csk->advmss -= 12;
609 if (csk->advmss < 128)
610 csk->advmss = 128;
611
612 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
613 "csk 0x%p, mss_idx %u, advmss %u.\n",
614 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
615
616 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
617
618 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
619 send_abort_req(csk);
620 else {
621 if (skb_queue_len(&csk->write_queue))
622 push_tx_frames(csk, 0);
623 cxgbi_conn_tx_open(csk);
624 }
625 spin_unlock_bh(&csk->lock);
626
627 rel_skb:
628 __kfree_skb(skb);
629 }
630
631 static int act_open_rpl_status_to_errno(int status)
632 {
633 switch (status) {
634 case CPL_ERR_CONN_RESET:
635 return -ECONNREFUSED;
636 case CPL_ERR_ARP_MISS:
637 return -EHOSTUNREACH;
638 case CPL_ERR_CONN_TIMEDOUT:
639 return -ETIMEDOUT;
640 case CPL_ERR_TCAM_FULL:
641 return -ENOMEM;
642 case CPL_ERR_CONN_EXIST:
643 return -EADDRINUSE;
644 default:
645 return -EIO;
646 }
647 }
648
649 static void csk_act_open_retry_timer(unsigned long data)
650 {
651 struct sk_buff *skb;
652 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
653
654 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
655 "csk 0x%p,%u,0x%lx,%u.\n",
656 csk, csk->state, csk->flags, csk->tid);
657
658 cxgbi_sock_get(csk);
659 spin_lock_bh(&csk->lock);
660 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
661 if (!skb)
662 cxgbi_sock_fail_act_open(csk, -ENOMEM);
663 else {
664 skb->sk = (struct sock *)csk;
665 t4_set_arp_err_handler(skb, csk,
666 cxgbi_sock_act_open_req_arp_failure);
667 send_act_open_req(csk, skb, csk->l2t);
668 }
669 spin_unlock_bh(&csk->lock);
670 cxgbi_sock_put(csk);
671 }
672
673 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
674 {
675 struct cxgbi_sock *csk;
676 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
677 unsigned int tid = GET_TID(rpl);
678 unsigned int atid =
679 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
680 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
681 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
682 struct tid_info *t = lldi->tids;
683
684 csk = lookup_atid(t, atid);
685 if (unlikely(!csk)) {
686 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
687 goto rel_skb;
688 }
689
690 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
691 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
692 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
693 atid, tid, status, csk, csk->state, csk->flags);
694
695 if (status == CPL_ERR_RTX_NEG_ADVICE)
696 goto rel_skb;
697
698 if (status && status != CPL_ERR_TCAM_FULL &&
699 status != CPL_ERR_CONN_EXIST &&
700 status != CPL_ERR_ARP_MISS)
701 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
702
703 cxgbi_sock_get(csk);
704 spin_lock_bh(&csk->lock);
705
706 if (status == CPL_ERR_CONN_EXIST &&
707 csk->retry_timer.function != csk_act_open_retry_timer) {
708 csk->retry_timer.function = csk_act_open_retry_timer;
709 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
710 } else
711 cxgbi_sock_fail_act_open(csk,
712 act_open_rpl_status_to_errno(status));
713
714 spin_unlock_bh(&csk->lock);
715 cxgbi_sock_put(csk);
716 rel_skb:
717 __kfree_skb(skb);
718 }
719
720 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
721 {
722 struct cxgbi_sock *csk;
723 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
724 unsigned int tid = GET_TID(req);
725 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
726 struct tid_info *t = lldi->tids;
727
728 csk = lookup_tid(t, tid);
729 if (unlikely(!csk)) {
730 pr_err("can't find connection for tid %u.\n", tid);
731 goto rel_skb;
732 }
733 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
734 "csk 0x%p,%u,0x%lx,%u.\n",
735 csk, csk->state, csk->flags, csk->tid);
736 cxgbi_sock_rcv_peer_close(csk);
737 rel_skb:
738 __kfree_skb(skb);
739 }
740
741 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
742 {
743 struct cxgbi_sock *csk;
744 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
745 unsigned int tid = GET_TID(rpl);
746 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
747 struct tid_info *t = lldi->tids;
748
749 csk = lookup_tid(t, tid);
750 if (unlikely(!csk)) {
751 pr_err("can't find connection for tid %u.\n", tid);
752 goto rel_skb;
753 }
754 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
755 "csk 0x%p,%u,0x%lx,%u.\n",
756 csk, csk->state, csk->flags, csk->tid);
757 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
758 rel_skb:
759 __kfree_skb(skb);
760 }
761
762 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
763 int *need_rst)
764 {
765 switch (abort_reason) {
766 case CPL_ERR_BAD_SYN: /* fall through */
767 case CPL_ERR_CONN_RESET:
768 return csk->state > CTP_ESTABLISHED ?
769 -EPIPE : -ECONNRESET;
770 case CPL_ERR_XMIT_TIMEDOUT:
771 case CPL_ERR_PERSIST_TIMEDOUT:
772 case CPL_ERR_FINWAIT2_TIMEDOUT:
773 case CPL_ERR_KEEPALIVE_TIMEDOUT:
774 return -ETIMEDOUT;
775 default:
776 return -EIO;
777 }
778 }
779
780 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
781 {
782 struct cxgbi_sock *csk;
783 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
784 unsigned int tid = GET_TID(req);
785 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
786 struct tid_info *t = lldi->tids;
787 int rst_status = CPL_ABORT_NO_RST;
788
789 csk = lookup_tid(t, tid);
790 if (unlikely(!csk)) {
791 pr_err("can't find connection for tid %u.\n", tid);
792 goto rel_skb;
793 }
794
795 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
796 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
797 csk, csk->state, csk->flags, csk->tid, req->status);
798
799 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
800 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
801 goto rel_skb;
802
803 cxgbi_sock_get(csk);
804 spin_lock_bh(&csk->lock);
805
806 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
807 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
808 cxgbi_sock_set_state(csk, CTP_ABORTING);
809 goto done;
810 }
811
812 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
813 send_abort_rpl(csk, rst_status);
814
815 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
816 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
817 cxgbi_sock_closed(csk);
818 }
819 done:
820 spin_unlock_bh(&csk->lock);
821 cxgbi_sock_put(csk);
822 rel_skb:
823 __kfree_skb(skb);
824 }
825
826 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
827 {
828 struct cxgbi_sock *csk;
829 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
830 unsigned int tid = GET_TID(rpl);
831 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
832 struct tid_info *t = lldi->tids;
833
834 csk = lookup_tid(t, tid);
835 if (!csk)
836 goto rel_skb;
837
838 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
839 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
840 rpl->status, csk, csk ? csk->state : 0,
841 csk ? csk->flags : 0UL);
842
843 if (rpl->status == CPL_ERR_ABORT_FAILED)
844 goto rel_skb;
845
846 cxgbi_sock_rcv_abort_rpl(csk);
847 rel_skb:
848 __kfree_skb(skb);
849 }
850
851 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
852 {
853 struct cxgbi_sock *csk;
854 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
855 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
856 unsigned int tid = GET_TID(cpl);
857 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
858 struct tid_info *t = lldi->tids;
859
860 csk = lookup_tid(t, tid);
861 if (unlikely(!csk)) {
862 pr_err("can't find conn. for tid %u.\n", tid);
863 goto rel_skb;
864 }
865
866 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
867 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
868 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
869 pdu_len_ddp);
870
871 spin_lock_bh(&csk->lock);
872
873 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
874 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
875 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
876 csk, csk->state, csk->flags, csk->tid);
877 if (csk->state != CTP_ABORTING)
878 goto abort_conn;
879 else
880 goto discard;
881 }
882
883 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
884 cxgbi_skcb_flags(skb) = 0;
885
886 skb_reset_transport_header(skb);
887 __skb_pull(skb, sizeof(*cpl));
888 __pskb_trim(skb, ntohs(cpl->len));
889
890 if (!csk->skb_ulp_lhdr) {
891 unsigned char *bhs;
892 unsigned int hlen, dlen;
893
894 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
895 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
896 csk, csk->state, csk->flags, csk->tid, skb);
897 csk->skb_ulp_lhdr = skb;
898 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
899
900 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
901 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
902 csk->tid, cxgbi_skcb_tcp_seq(skb),
903 csk->rcv_nxt);
904 goto abort_conn;
905 }
906
907 bhs = skb->data;
908 hlen = ntohs(cpl->len);
909 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
910
911 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
912 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
913 "mismatch %u != %u + %u, seq 0x%x.\n",
914 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40,
915 hlen, dlen, cxgbi_skcb_tcp_seq(skb));
916 goto abort_conn;
917 }
918
919 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
920 if (dlen)
921 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
922 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
923
924 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
925 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
926 csk, skb, *bhs, hlen, dlen,
927 ntohl(*((unsigned int *)(bhs + 16))),
928 ntohl(*((unsigned int *)(bhs + 24))));
929
930 } else {
931 struct sk_buff *lskb = csk->skb_ulp_lhdr;
932
933 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
934 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
935 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
936 csk, csk->state, csk->flags, skb, lskb);
937 }
938
939 __skb_queue_tail(&csk->receive_queue, skb);
940 spin_unlock_bh(&csk->lock);
941 return;
942
943 abort_conn:
944 send_abort_req(csk);
945 discard:
946 spin_unlock_bh(&csk->lock);
947 rel_skb:
948 __kfree_skb(skb);
949 }
950
951 static void do_rx_data_ddp(struct cxgbi_device *cdev,
952 struct sk_buff *skb)
953 {
954 struct cxgbi_sock *csk;
955 struct sk_buff *lskb;
956 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
957 unsigned int tid = GET_TID(rpl);
958 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
959 struct tid_info *t = lldi->tids;
960 unsigned int status = ntohl(rpl->ddpvld);
961
962 csk = lookup_tid(t, tid);
963 if (unlikely(!csk)) {
964 pr_err("can't find connection for tid %u.\n", tid);
965 goto rel_skb;
966 }
967
968 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
969 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
970 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
971
972 spin_lock_bh(&csk->lock);
973
974 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
975 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
976 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
977 csk, csk->state, csk->flags, csk->tid);
978 if (csk->state != CTP_ABORTING)
979 goto abort_conn;
980 else
981 goto discard;
982 }
983
984 if (!csk->skb_ulp_lhdr) {
985 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
986 goto abort_conn;
987 }
988
989 lskb = csk->skb_ulp_lhdr;
990 csk->skb_ulp_lhdr = NULL;
991
992 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
993
994 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
995 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
996 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
997
998 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
999 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1000 csk, lskb, status, cxgbi_skcb_flags(lskb));
1001 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1002 }
1003 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1004 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1005 csk, lskb, status, cxgbi_skcb_flags(lskb));
1006 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1007 }
1008 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1009 log_debug(1 << CXGBI_DBG_PDU_RX,
1010 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1011 csk, lskb, status);
1012 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1013 }
1014 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1015 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1016 log_debug(1 << CXGBI_DBG_PDU_RX,
1017 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1018 csk, lskb, status);
1019 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1020 }
1021 log_debug(1 << CXGBI_DBG_PDU_RX,
1022 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1023 csk, lskb, cxgbi_skcb_flags(lskb));
1024
1025 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1026 cxgbi_conn_pdu_ready(csk);
1027 spin_unlock_bh(&csk->lock);
1028 goto rel_skb;
1029
1030 abort_conn:
1031 send_abort_req(csk);
1032 discard:
1033 spin_unlock_bh(&csk->lock);
1034 rel_skb:
1035 __kfree_skb(skb);
1036 }
1037
1038 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1039 {
1040 struct cxgbi_sock *csk;
1041 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1042 unsigned int tid = GET_TID(rpl);
1043 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1044 struct tid_info *t = lldi->tids;
1045
1046 csk = lookup_tid(t, tid);
1047 if (unlikely(!csk))
1048 pr_err("can't find connection for tid %u.\n", tid);
1049 else {
1050 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1051 "csk 0x%p,%u,0x%lx,%u.\n",
1052 csk, csk->state, csk->flags, csk->tid);
1053 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1054 rpl->seq_vld);
1055 }
1056 __kfree_skb(skb);
1057 }
1058
1059 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1060 {
1061 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1062 unsigned int tid = GET_TID(rpl);
1063 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1064 struct tid_info *t = lldi->tids;
1065 struct cxgbi_sock *csk;
1066
1067 csk = lookup_tid(t, tid);
1068 if (!csk)
1069 pr_err("can't find conn. for tid %u.\n", tid);
1070
1071 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1072 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1073 csk, csk->state, csk->flags, csk->tid, rpl->status);
1074
1075 if (rpl->status != CPL_ERR_NONE)
1076 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1077 csk, tid, rpl->status);
1078
1079 __kfree_skb(skb);
1080 }
1081
1082 static int alloc_cpls(struct cxgbi_sock *csk)
1083 {
1084 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1085 0, GFP_KERNEL);
1086 if (!csk->cpl_close)
1087 return -ENOMEM;
1088
1089 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1090 0, GFP_KERNEL);
1091 if (!csk->cpl_abort_req)
1092 goto free_cpls;
1093
1094 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1095 0, GFP_KERNEL);
1096 if (!csk->cpl_abort_rpl)
1097 goto free_cpls;
1098 return 0;
1099
1100 free_cpls:
1101 cxgbi_sock_free_cpl_skbs(csk);
1102 return -ENOMEM;
1103 }
1104
1105 static inline void l2t_put(struct cxgbi_sock *csk)
1106 {
1107 if (csk->l2t) {
1108 cxgb4_l2t_release(csk->l2t);
1109 csk->l2t = NULL;
1110 cxgbi_sock_put(csk);
1111 }
1112 }
1113
1114 static void release_offload_resources(struct cxgbi_sock *csk)
1115 {
1116 struct cxgb4_lld_info *lldi;
1117
1118 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1119 "csk 0x%p,%u,0x%lx,%u.\n",
1120 csk, csk->state, csk->flags, csk->tid);
1121
1122 cxgbi_sock_free_cpl_skbs(csk);
1123 if (csk->wr_cred != csk->wr_max_cred) {
1124 cxgbi_sock_purge_wr_queue(csk);
1125 cxgbi_sock_reset_wr_list(csk);
1126 }
1127
1128 l2t_put(csk);
1129 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1130 free_atid(csk);
1131 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1132 lldi = cxgbi_cdev_priv(csk->cdev);
1133 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1134 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1135 cxgbi_sock_put(csk);
1136 }
1137 csk->dst = NULL;
1138 csk->cdev = NULL;
1139 }
1140
1141 static int init_act_open(struct cxgbi_sock *csk)
1142 {
1143 struct cxgbi_device *cdev = csk->cdev;
1144 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1145 struct net_device *ndev = cdev->ports[csk->port_id];
1146 struct port_info *pi = netdev_priv(ndev);
1147 struct sk_buff *skb = NULL;
1148 unsigned int step;
1149
1150 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1151 "csk 0x%p,%u,0x%lx,%u.\n",
1152 csk, csk->state, csk->flags, csk->tid);
1153
1154 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1155 if (csk->atid < 0) {
1156 pr_err("%s, NO atid available.\n", ndev->name);
1157 return -EINVAL;
1158 }
1159 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1160 cxgbi_sock_get(csk);
1161
1162 csk->l2t = cxgb4_l2t_get(lldi->l2t, dst_get_neighbour(csk->dst), ndev, 0);
1163 if (!csk->l2t) {
1164 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1165 goto rel_resource;
1166 }
1167 cxgbi_sock_get(csk);
1168
1169 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
1170 if (!skb)
1171 goto rel_resource;
1172 skb->sk = (struct sock *)csk;
1173 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1174
1175 if (!csk->mtu)
1176 csk->mtu = dst_mtu(csk->dst);
1177 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1178 csk->tx_chan = cxgb4_port_chan(ndev);
1179 /* SMT two entries per row */
1180 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1181 step = lldi->ntxq / lldi->nchan;
1182 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1183 step = lldi->nrxq / lldi->nchan;
1184 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1185 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1186 csk->wr_una_cred = 0;
1187 cxgbi_sock_reset_wr_list(csk);
1188 csk->err = 0;
1189 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1190 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1191 csk, pi->port_id, ndev->name, csk->tx_chan,
1192 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1193 csk->smac_idx);
1194
1195 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1196 send_act_open_req(csk, skb, csk->l2t);
1197 return 0;
1198
1199 rel_resource:
1200 if (skb)
1201 __kfree_skb(skb);
1202 return -EINVAL;
1203 }
1204
1205 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1206 [CPL_ACT_ESTABLISH] = do_act_establish,
1207 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1208 [CPL_PEER_CLOSE] = do_peer_close,
1209 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1210 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1211 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1212 [CPL_FW4_ACK] = do_fw4_ack,
1213 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1214 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1215 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1216 };
1217
1218 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1219 {
1220 int rc;
1221
1222 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1223 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1224
1225 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1226 cxgb4i_max_connect);
1227 if (rc < 0)
1228 return rc;
1229
1230 cdev->csk_release_offload_resources = release_offload_resources;
1231 cdev->csk_push_tx_frames = push_tx_frames;
1232 cdev->csk_send_abort_req = send_abort_req;
1233 cdev->csk_send_close_req = send_close_req;
1234 cdev->csk_send_rx_credits = send_rx_credits;
1235 cdev->csk_alloc_cpls = alloc_cpls;
1236 cdev->csk_init_act_open = init_act_open;
1237
1238 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1239 return 0;
1240 }
1241
1242 /*
1243 * functions to program the pagepod in h/w
1244 */
1245 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1246 static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
1247 unsigned int wr_len, unsigned int dlen,
1248 unsigned int pm_addr)
1249 {
1250 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1251
1252 INIT_ULPTX_WR(req, wr_len, 0, 0);
1253 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23));
1254 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1255 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1256 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1257
1258 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1259 idata->len = htonl(dlen);
1260 }
1261
1262 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1263 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1264 unsigned int npods,
1265 struct cxgbi_gather_list *gl,
1266 unsigned int gl_pidx)
1267 {
1268 struct cxgbi_ddp_info *ddp = cdev->ddp;
1269 struct sk_buff *skb;
1270 struct ulp_mem_io *req;
1271 struct ulptx_idata *idata;
1272 struct cxgbi_pagepod *ppod;
1273 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1274 unsigned int dlen = PPOD_SIZE * npods;
1275 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1276 sizeof(struct ulptx_idata) + dlen, 16);
1277 unsigned int i;
1278
1279 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1280 if (!skb) {
1281 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1282 cdev, idx, npods);
1283 return -ENOMEM;
1284 }
1285 req = (struct ulp_mem_io *)skb->head;
1286 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1287
1288 ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr);
1289 idata = (struct ulptx_idata *)(req + 1);
1290 ppod = (struct cxgbi_pagepod *)(idata + 1);
1291
1292 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1293 if (!hdr && !gl)
1294 cxgbi_ddp_ppod_clear(ppod);
1295 else
1296 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1297 }
1298
1299 cxgb4_ofld_send(cdev->ports[port_id], skb);
1300 return 0;
1301 }
1302
1303 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1304 unsigned int idx, unsigned int npods,
1305 struct cxgbi_gather_list *gl)
1306 {
1307 unsigned int i, cnt;
1308 int err = 0;
1309
1310 for (i = 0; i < npods; i += cnt, idx += cnt) {
1311 cnt = npods - i;
1312 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1313 cnt = ULPMEM_IDATA_MAX_NPPODS;
1314 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1315 idx, cnt, gl, 4 * i);
1316 if (err < 0)
1317 break;
1318 }
1319 return err;
1320 }
1321
1322 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1323 unsigned int idx, unsigned int npods)
1324 {
1325 unsigned int i, cnt;
1326 int err;
1327
1328 for (i = 0; i < npods; i += cnt, idx += cnt) {
1329 cnt = npods - i;
1330 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1331 cnt = ULPMEM_IDATA_MAX_NPPODS;
1332 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1333 idx, cnt, NULL, 0);
1334 if (err < 0)
1335 break;
1336 }
1337 }
1338
1339 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1340 int pg_idx, bool reply)
1341 {
1342 struct sk_buff *skb;
1343 struct cpl_set_tcb_field *req;
1344
1345 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1346 return 0;
1347
1348 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1349 if (!skb)
1350 return -ENOMEM;
1351
1352 /* set up ulp page size */
1353 req = (struct cpl_set_tcb_field *)skb->head;
1354 INIT_TP_WR(req, csk->tid);
1355 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1356 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1357 req->word_cookie = htons(0);
1358 req->mask = cpu_to_be64(0x3 << 8);
1359 req->val = cpu_to_be64(pg_idx << 8);
1360 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1361
1362 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1363 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1364
1365 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1366 return 0;
1367 }
1368
1369 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1370 int hcrc, int dcrc, int reply)
1371 {
1372 struct sk_buff *skb;
1373 struct cpl_set_tcb_field *req;
1374
1375 if (!hcrc && !dcrc)
1376 return 0;
1377
1378 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1379 if (!skb)
1380 return -ENOMEM;
1381
1382 csk->hcrc_len = (hcrc ? 4 : 0);
1383 csk->dcrc_len = (dcrc ? 4 : 0);
1384 /* set up ulp submode */
1385 req = (struct cpl_set_tcb_field *)skb->head;
1386 INIT_TP_WR(req, tid);
1387 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1388 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1389 req->word_cookie = htons(0);
1390 req->mask = cpu_to_be64(0x3 << 4);
1391 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1392 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1393 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1394
1395 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1396 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1397
1398 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1399 return 0;
1400 }
1401
1402 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1403 {
1404 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1405 struct cxgbi_ddp_info *ddp = cdev->ddp;
1406 unsigned int tagmask, pgsz_factor[4];
1407 int err;
1408
1409 if (ddp) {
1410 kref_get(&ddp->refcnt);
1411 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1412 cdev, cdev->ddp);
1413 return -EALREADY;
1414 }
1415
1416 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1417 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1418 lldi->iscsi_iolen, lldi->iscsi_iolen);
1419 if (err < 0)
1420 return err;
1421
1422 ddp = cdev->ddp;
1423
1424 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1425 cxgbi_ddp_page_size_factor(pgsz_factor);
1426 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1427
1428 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1429 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1430 cdev->csk_ddp_set = ddp_set_map;
1431 cdev->csk_ddp_clear = ddp_clear_map;
1432
1433 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1434 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1435 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1436 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1437 " %u/%u.\n",
1438 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1439 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1440 ddp->max_rxsz, lldi->iscsi_iolen);
1441 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1442 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1443 ddp->max_rxsz);
1444 return 0;
1445 }
1446
1447 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1448 {
1449 struct cxgbi_device *cdev;
1450 struct port_info *pi;
1451 int i, rc;
1452
1453 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1454 if (!cdev) {
1455 pr_info("t4 device 0x%p, register failed.\n", lldi);
1456 return NULL;
1457 }
1458 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1459 cdev, lldi->adapter_type, lldi->nports,
1460 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1461 lldi->nrxq, lldi->wr_cred);
1462 for (i = 0; i < lldi->nrxq; i++)
1463 log_debug(1 << CXGBI_DBG_DEV,
1464 "t4 0x%p, rxq id #%d: %u.\n",
1465 cdev, i, lldi->rxq_ids[i]);
1466
1467 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1468 cdev->flags = CXGBI_FLAG_DEV_T4;
1469 cdev->pdev = lldi->pdev;
1470 cdev->ports = lldi->ports;
1471 cdev->nports = lldi->nports;
1472 cdev->mtus = lldi->mtus;
1473 cdev->nmtus = NMTUS;
1474 cdev->snd_win = cxgb4i_snd_win;
1475 cdev->rcv_win = cxgb4i_rcv_win;
1476 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1477 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1478 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1479 cdev->itp = &cxgb4i_iscsi_transport;
1480
1481 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1482 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1483 cdev, lldi->ports[0]->name, cdev->pfvf);
1484
1485 rc = cxgb4i_ddp_init(cdev);
1486 if (rc) {
1487 pr_info("t4 0x%p ddp init failed.\n", cdev);
1488 goto err_out;
1489 }
1490 rc = cxgb4i_ofld_init(cdev);
1491 if (rc) {
1492 pr_info("t4 0x%p ofld init failed.\n", cdev);
1493 goto err_out;
1494 }
1495
1496 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1497 &cxgb4i_host_template, cxgb4i_stt);
1498 if (rc)
1499 goto err_out;
1500
1501 for (i = 0; i < cdev->nports; i++) {
1502 pi = netdev_priv(lldi->ports[i]);
1503 cdev->hbas[i]->port_id = pi->port_id;
1504 }
1505 return cdev;
1506
1507 err_out:
1508 cxgbi_device_unregister(cdev);
1509 return ERR_PTR(-ENOMEM);
1510 }
1511
1512 #define RX_PULL_LEN 128
1513 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1514 const struct pkt_gl *pgl)
1515 {
1516 const struct cpl_act_establish *rpl;
1517 struct sk_buff *skb;
1518 unsigned int opc;
1519 struct cxgbi_device *cdev = handle;
1520
1521 if (pgl == NULL) {
1522 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1523
1524 skb = alloc_wr(len, 0, GFP_ATOMIC);
1525 if (!skb)
1526 goto nomem;
1527 skb_copy_to_linear_data(skb, &rsp[1], len);
1528 } else {
1529 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1530 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1531 pgl->va, be64_to_cpu(*rsp),
1532 be64_to_cpu(*(u64 *)pgl->va),
1533 pgl->tot_len);
1534 return 0;
1535 }
1536 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1537 if (unlikely(!skb))
1538 goto nomem;
1539 }
1540
1541 rpl = (struct cpl_act_establish *)skb->data;
1542 opc = rpl->ot.opcode;
1543 log_debug(1 << CXGBI_DBG_TOE,
1544 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1545 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1546 if (cxgb4i_cplhandlers[opc])
1547 cxgb4i_cplhandlers[opc](cdev, skb);
1548 else {
1549 pr_err("No handler for opcode 0x%x.\n", opc);
1550 __kfree_skb(skb);
1551 }
1552 return 0;
1553 nomem:
1554 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1555 return 1;
1556 }
1557
1558 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1559 {
1560 struct cxgbi_device *cdev = handle;
1561
1562 switch (state) {
1563 case CXGB4_STATE_UP:
1564 pr_info("cdev 0x%p, UP.\n", cdev);
1565 /* re-initialize */
1566 break;
1567 case CXGB4_STATE_START_RECOVERY:
1568 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1569 /* close all connections */
1570 break;
1571 case CXGB4_STATE_DOWN:
1572 pr_info("cdev 0x%p, DOWN.\n", cdev);
1573 break;
1574 case CXGB4_STATE_DETACH:
1575 pr_info("cdev 0x%p, DETACH.\n", cdev);
1576 break;
1577 default:
1578 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1579 break;
1580 }
1581 return 0;
1582 }
1583
1584 static int __init cxgb4i_init_module(void)
1585 {
1586 int rc;
1587
1588 printk(KERN_INFO "%s", version);
1589
1590 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1591 if (rc < 0)
1592 return rc;
1593 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1594 return 0;
1595 }
1596
1597 static void __exit cxgb4i_exit_module(void)
1598 {
1599 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1600 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1601 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1602 }
1603
1604 module_init(cxgb4i_init_module);
1605 module_exit(cxgb4i_exit_module);
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