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[SCSI] iscsi class: sysfs group is_visible callout for session attrs
[deliverable/linux.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
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7b36b6e0 1/*
2 * cxgb4i.c: Chelsio T4 iSCSI driver.
3 *
4 * Copyright (c) 2010 Chelsio Communications, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Rakesh Ranjan (rranjan@chelsio.com)
12 */
13
14#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
15
16#include <linux/version.h>
17#include <linux/module.h>
18#include <linux/moduleparam.h>
19#include <scsi/scsi_host.h>
20#include <net/tcp.h>
21#include <net/dst.h>
22#include <linux/netdevice.h>
23
24#include "t4_msg.h"
25#include "cxgb4.h"
26#include "cxgb4_uld.h"
27#include "t4fw_api.h"
28#include "l2t.h"
29#include "cxgb4i.h"
30
31static unsigned int dbg_level;
32
33#include "../libcxgbi.h"
34
35#define DRV_MODULE_NAME "cxgb4i"
36#define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver"
e27d6169 37#define DRV_MODULE_VERSION "0.9.1"
38#define DRV_MODULE_RELDATE "Aug. 2010"
7b36b6e0 39
40static char version[] =
41 DRV_MODULE_DESC " " DRV_MODULE_NAME
42 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
43
44MODULE_AUTHOR("Chelsio Communications, Inc.");
45MODULE_DESCRIPTION(DRV_MODULE_DESC);
46MODULE_VERSION(DRV_MODULE_VERSION);
47MODULE_LICENSE("GPL");
48
49module_param(dbg_level, uint, 0644);
50MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
51
52static int cxgb4i_rcv_win = 256 * 1024;
53module_param(cxgb4i_rcv_win, int, 0644);
54MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
55
56static int cxgb4i_snd_win = 128 * 1024;
57module_param(cxgb4i_snd_win, int, 0644);
58MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
59
60static int cxgb4i_rx_credit_thres = 10 * 1024;
61module_param(cxgb4i_rx_credit_thres, int, 0644);
62MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
63 "RX credits return threshold in bytes (default=10KB)");
64
65static unsigned int cxgb4i_max_connect = (8 * 1024);
66module_param(cxgb4i_max_connect, uint, 0644);
67MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
68
69static unsigned short cxgb4i_sport_base = 20000;
70module_param(cxgb4i_sport_base, ushort, 0644);
71MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
72
73typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
74
75static void *t4_uld_add(const struct cxgb4_lld_info *);
76static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
77static int t4_uld_state_change(void *, enum cxgb4_state state);
78
79static const struct cxgb4_uld_info cxgb4i_uld_info = {
80 .name = DRV_MODULE_NAME,
81 .add = t4_uld_add,
82 .rx_handler = t4_uld_rx_handler,
83 .state_change = t4_uld_state_change,
84};
85
86static struct scsi_host_template cxgb4i_host_template = {
87 .module = THIS_MODULE,
88 .name = DRV_MODULE_NAME,
89 .proc_name = DRV_MODULE_NAME,
90 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
91 .queuecommand = iscsi_queuecommand,
92 .change_queue_depth = iscsi_change_queue_depth,
93 .sg_tablesize = SG_ALL,
94 .max_sectors = 0xFFFF,
95 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
96 .eh_abort_handler = iscsi_eh_abort,
97 .eh_device_reset_handler = iscsi_eh_device_reset,
98 .eh_target_reset_handler = iscsi_eh_recover_target,
99 .target_alloc = iscsi_target_alloc,
100 .use_clustering = DISABLE_CLUSTERING,
101 .this_id = -1,
102};
103
104static struct iscsi_transport cxgb4i_iscsi_transport = {
105 .owner = THIS_MODULE,
106 .name = DRV_MODULE_NAME,
107 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
108 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
fdafd4df 109 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
7b36b6e0 110 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
111 ISCSI_HOST_INITIATOR_NAME |
112 ISCSI_HOST_NETDEV_NAME,
3128c6c7 113 .attr_is_visible = cxgbi_attr_is_visible,
7b36b6e0 114 .get_host_param = cxgbi_get_host_param,
115 .set_host_param = cxgbi_set_host_param,
116 /* session management */
117 .create_session = cxgbi_create_session,
118 .destroy_session = cxgbi_destroy_session,
119 .get_session_param = iscsi_session_get_param,
120 /* connection management */
121 .create_conn = cxgbi_create_conn,
122 .bind_conn = cxgbi_bind_conn,
123 .destroy_conn = iscsi_tcp_conn_teardown,
124 .start_conn = iscsi_conn_start,
125 .stop_conn = iscsi_conn_stop,
c71b9b66 126 .get_conn_param = iscsi_conn_get_param,
7b36b6e0 127 .set_param = cxgbi_set_conn_param,
128 .get_stats = cxgbi_get_conn_stats,
129 /* pdu xmit req from user space */
130 .send_pdu = iscsi_conn_send_pdu,
131 /* task */
132 .init_task = iscsi_tcp_task_init,
133 .xmit_task = iscsi_tcp_task_xmit,
134 .cleanup_task = cxgbi_cleanup_task,
135 /* pdu */
136 .alloc_pdu = cxgbi_conn_alloc_pdu,
137 .init_pdu = cxgbi_conn_init_pdu,
138 .xmit_pdu = cxgbi_conn_xmit_pdu,
139 .parse_pdu_itt = cxgbi_parse_pdu_itt,
140 /* TCP connect/disconnect */
c71b9b66 141 .get_ep_param = cxgbi_get_ep_param,
7b36b6e0 142 .ep_connect = cxgbi_ep_connect,
143 .ep_poll = cxgbi_ep_poll,
144 .ep_disconnect = cxgbi_ep_disconnect,
145 /* Error recovery timeout call */
146 .session_recovery_timedout = iscsi_session_recovery_timedout,
147};
148
149static struct scsi_transport_template *cxgb4i_stt;
150
151/*
152 * CPL (Chelsio Protocol Language) defines a message passing interface between
153 * the host driver and Chelsio asic.
154 * The section below implments CPLs that related to iscsi tcp connection
155 * open/close/abort and data send/receive.
156 */
157#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
158#define RCV_BUFSIZ_MASK 0x3FFU
159#define MAX_IMM_TX_PKT_LEN 128
160
161static inline void set_queue(struct sk_buff *skb, unsigned int queue,
162 const struct cxgbi_sock *csk)
163{
164 skb->queue_mapping = queue;
165}
166
167static int push_tx_frames(struct cxgbi_sock *, int);
168
169/*
170 * is_ofld_imm - check whether a packet can be sent as immediate data
171 * @skb: the packet
172 *
173 * Returns true if a packet can be sent as an offload WR with immediate
174 * data. We currently use the same limit as for Ethernet packets.
175 */
176static inline int is_ofld_imm(const struct sk_buff *skb)
177{
178 return skb->len <= (MAX_IMM_TX_PKT_LEN -
179 sizeof(struct fw_ofld_tx_data_wr));
180}
181
182static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
183 struct l2t_entry *e)
184{
185 struct cpl_act_open_req *req;
186 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
187 unsigned long long opt0;
188 unsigned int opt2;
189 unsigned int qid_atid = ((unsigned int)csk->atid) |
190 (((unsigned int)csk->rss_qid) << 14);
191
192 opt0 = KEEP_ALIVE(1) |
193 WND_SCALE(wscale) |
194 MSS_IDX(csk->mss_idx) |
195 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
196 TX_CHAN(csk->tx_chan) |
197 SMAC_SEL(csk->smac_idx) |
198 ULP_MODE(ULP_MODE_ISCSI) |
199 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
200 opt2 = RX_CHANNEL(0) |
201 RSS_QUEUE_VALID |
202 (1 << 20) | (1 << 22) |
203 RSS_QUEUE(csk->rss_qid);
204
205 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
206 req = (struct cpl_act_open_req *)skb->head;
207
208 INIT_TP_WR(req, 0);
209 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
210 qid_atid));
211 req->local_port = csk->saddr.sin_port;
212 req->peer_port = csk->daddr.sin_port;
213 req->local_ip = csk->saddr.sin_addr.s_addr;
214 req->peer_ip = csk->daddr.sin_addr.s_addr;
215 req->opt0 = cpu_to_be64(opt0);
216 req->params = 0;
217 req->opt2 = cpu_to_be32(opt2);
218
219 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
220 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
221 csk, &req->local_ip, ntohs(req->local_port),
222 &req->peer_ip, ntohs(req->peer_port),
223 csk->atid, csk->rss_qid);
224
225 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
226}
227
228static void send_close_req(struct cxgbi_sock *csk)
229{
230 struct sk_buff *skb = csk->cpl_close;
231 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
232 unsigned int tid = csk->tid;
233
234 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
235 "csk 0x%p,%u,0x%lx, tid %u.\n",
236 csk, csk->state, csk->flags, csk->tid);
237 csk->cpl_close = NULL;
238 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
239 INIT_TP_WR(req, tid);
240 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
241 req->rsvd = 0;
242
243 cxgbi_sock_skb_entail(csk, skb);
244 if (csk->state >= CTP_ESTABLISHED)
245 push_tx_frames(csk, 1);
246}
247
248static void abort_arp_failure(void *handle, struct sk_buff *skb)
249{
250 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
251 struct cpl_abort_req *req;
252
253 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
254 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
255 csk, csk->state, csk->flags, csk->tid);
256 req = (struct cpl_abort_req *)skb->data;
257 req->cmd = CPL_ABORT_NO_RST;
258 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
259}
260
261static void send_abort_req(struct cxgbi_sock *csk)
262{
263 struct cpl_abort_req *req;
264 struct sk_buff *skb = csk->cpl_abort_req;
265
266 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
267 return;
268 cxgbi_sock_set_state(csk, CTP_ABORTING);
269 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
270 cxgbi_sock_purge_write_queue(csk);
271
272 csk->cpl_abort_req = NULL;
273 req = (struct cpl_abort_req *)skb->head;
274 set_queue(skb, CPL_PRIORITY_DATA, csk);
275 req->cmd = CPL_ABORT_SEND_RST;
276 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
277 INIT_TP_WR(req, csk->tid);
278 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
279 req->rsvd0 = htonl(csk->snd_nxt);
280 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
281
282 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
283 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
284 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
285 req->rsvd1);
286
287 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
288}
289
290static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
291{
292 struct sk_buff *skb = csk->cpl_abort_rpl;
293 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
294
295 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
296 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
297 csk, csk->state, csk->flags, csk->tid, rst_status);
298
299 csk->cpl_abort_rpl = NULL;
300 set_queue(skb, CPL_PRIORITY_DATA, csk);
301 INIT_TP_WR(rpl, csk->tid);
302 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
303 rpl->cmd = rst_status;
304 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
305}
306
307/*
308 * CPL connection rx data ack: host ->
309 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
310 * credits sent.
311 */
312static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
313{
314 struct sk_buff *skb;
315 struct cpl_rx_data_ack *req;
316
317 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
318 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
319 csk, csk->state, csk->flags, csk->tid, credits);
320
24d3f95a 321 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
7b36b6e0 322 if (!skb) {
323 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
324 return 0;
325 }
326 req = (struct cpl_rx_data_ack *)skb->head;
327
328 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
329 INIT_TP_WR(req, csk->tid);
330 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
331 csk->tid));
332 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
333 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
334 return credits;
335}
336
337/*
338 * sgl_len - calculates the size of an SGL of the given capacity
339 * @n: the number of SGL entries
340 * Calculates the number of flits needed for a scatter/gather list that
341 * can hold the given number of entries.
342 */
343static inline unsigned int sgl_len(unsigned int n)
344{
345 n--;
346 return (3 * n) / 2 + (n & 1) + 2;
347}
348
349/*
350 * calc_tx_flits_ofld - calculate # of flits for an offload packet
351 * @skb: the packet
352 *
353 * Returns the number of flits needed for the given offload packet.
354 * These packets are already fully constructed and no additional headers
355 * will be added.
356 */
357static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
358{
359 unsigned int flits, cnt;
360
361 if (is_ofld_imm(skb))
362 return DIV_ROUND_UP(skb->len, 8);
363 flits = skb_transport_offset(skb) / 8;
364 cnt = skb_shinfo(skb)->nr_frags;
365 if (skb->tail != skb->transport_header)
366 cnt++;
367 return flits + sgl_len(cnt);
368}
369
370static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
371{
372 struct sk_buff *skb;
373 struct fw_flowc_wr *flowc;
374 int flowclen, i;
375
376 flowclen = 80;
24d3f95a 377 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
7b36b6e0 378 flowc = (struct fw_flowc_wr *)skb->head;
379 flowc->op_to_nparams =
380 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
381 flowc->flowid_len16 =
382 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
383 FW_WR_FLOWID(csk->tid));
384 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
e27d6169 385 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
7b36b6e0 386 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
387 flowc->mnemval[1].val = htonl(csk->tx_chan);
388 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
389 flowc->mnemval[2].val = htonl(csk->tx_chan);
390 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
391 flowc->mnemval[3].val = htonl(csk->rss_qid);
392 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
393 flowc->mnemval[4].val = htonl(csk->snd_nxt);
394 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
395 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
396 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
397 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
398 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
399 flowc->mnemval[7].val = htonl(csk->advmss);
400 flowc->mnemval[8].mnemonic = 0;
401 flowc->mnemval[8].val = 0;
402 for (i = 0; i < 9; i++) {
403 flowc->mnemval[i].r4[0] = 0;
404 flowc->mnemval[i].r4[1] = 0;
405 flowc->mnemval[i].r4[2] = 0;
406 }
407 set_queue(skb, CPL_PRIORITY_DATA, csk);
408
409 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
410 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
411 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
412 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
413 csk->advmss);
414
415 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
416}
417
418static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
419 int dlen, int len, u32 credits, int compl)
420{
421 struct fw_ofld_tx_data_wr *req;
422 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
423 unsigned int wr_ulp_mode = 0;
424
425 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
426
427 if (is_ofld_imm(skb)) {
428 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
429 FW_WR_COMPL(1) |
430 FW_WR_IMMDLEN(dlen));
431 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
432 FW_WR_LEN16(credits));
433 } else {
434 req->op_to_immdlen =
435 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
436 FW_WR_COMPL(1) |
437 FW_WR_IMMDLEN(0));
438 req->flowid_len16 =
439 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
440 FW_WR_LEN16(credits));
441 }
442 if (submode)
443 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
444 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
445 req->tunnel_to_proxy = htonl(wr_ulp_mode) |
446 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1);
447 req->plen = htonl(len);
448 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
449 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
450}
451
452static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
453{
454 kfree_skb(skb);
455}
456
457static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
458{
459 int total_size = 0;
460 struct sk_buff *skb;
461
462 if (unlikely(csk->state < CTP_ESTABLISHED ||
463 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
464 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
465 1 << CXGBI_DBG_PDU_TX,
466 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
467 csk, csk->state, csk->flags, csk->tid);
468 return 0;
469 }
470
471 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
472 int dlen = skb->len;
473 int len = skb->len;
474 unsigned int credits_needed;
475
476 skb_reset_transport_header(skb);
477 if (is_ofld_imm(skb))
478 credits_needed = DIV_ROUND_UP(dlen +
479 sizeof(struct fw_ofld_tx_data_wr), 16);
480 else
481 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
482 + sizeof(struct fw_ofld_tx_data_wr),
483 16);
484
485 if (csk->wr_cred < credits_needed) {
486 log_debug(1 << CXGBI_DBG_PDU_TX,
487 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
488 csk, skb->len, skb->data_len,
489 credits_needed, csk->wr_cred);
490 break;
491 }
492 __skb_unlink(skb, &csk->write_queue);
493 set_queue(skb, CPL_PRIORITY_DATA, csk);
494 skb->csum = credits_needed;
495 csk->wr_cred -= credits_needed;
496 csk->wr_una_cred += credits_needed;
497 cxgbi_sock_enqueue_wr(csk, skb);
498
499 log_debug(1 << CXGBI_DBG_PDU_TX,
500 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
501 csk, skb->len, skb->data_len, credits_needed,
502 csk->wr_cred, csk->wr_una_cred);
503
504 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
505 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
506 send_tx_flowc_wr(csk);
507 skb->csum += 5;
508 csk->wr_cred -= 5;
509 csk->wr_una_cred += 5;
510 }
511 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
512 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
513 req_completion);
514 csk->snd_nxt += len;
515 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
516 }
517 total_size += skb->truesize;
518 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
519
520 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
521 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
522 csk, csk->state, csk->flags, csk->tid, skb, len);
523
524 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
525 }
526 return total_size;
527}
528
529static inline void free_atid(struct cxgbi_sock *csk)
530{
531 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
532
533 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
534 cxgb4_free_atid(lldi->tids, csk->atid);
535 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
536 cxgbi_sock_put(csk);
537 }
538}
539
540static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
541{
542 struct cxgbi_sock *csk;
543 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
544 unsigned short tcp_opt = ntohs(req->tcp_opt);
545 unsigned int tid = GET_TID(req);
546 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
547 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
548 struct tid_info *t = lldi->tids;
549 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
550
551 csk = lookup_atid(t, atid);
552 if (unlikely(!csk)) {
553 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
554 goto rel_skb;
555 }
556
e27d6169 557 if (csk->atid != atid) {
558 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
559 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
560 goto rel_skb;
561 }
562
7b36b6e0 563 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
564 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
565 csk, csk->state, csk->flags, tid, atid, rcv_isn);
566
567 cxgbi_sock_get(csk);
568 csk->tid = tid;
569 cxgb4_insert_tid(lldi->tids, csk, tid);
570 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
571
572 free_atid(csk);
573
574 spin_lock_bh(&csk->lock);
575 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
576 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
577 csk, csk->state, csk->flags, csk->tid);
578
579 if (csk->retry_timer.function) {
580 del_timer(&csk->retry_timer);
581 csk->retry_timer.function = NULL;
582 }
583
584 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
585 /*
586 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
587 * pass through opt0.
588 */
589 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
590 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
591
592 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
593 if (GET_TCPOPT_TSTAMP(tcp_opt))
594 csk->advmss -= 12;
595 if (csk->advmss < 128)
596 csk->advmss = 128;
597
598 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
599 "csk 0x%p, mss_idx %u, advmss %u.\n",
600 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
601
602 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
603
604 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
605 send_abort_req(csk);
606 else {
607 if (skb_queue_len(&csk->write_queue))
608 push_tx_frames(csk, 0);
609 cxgbi_conn_tx_open(csk);
610 }
611 spin_unlock_bh(&csk->lock);
612
613rel_skb:
614 __kfree_skb(skb);
615}
616
617static int act_open_rpl_status_to_errno(int status)
618{
619 switch (status) {
620 case CPL_ERR_CONN_RESET:
621 return -ECONNREFUSED;
622 case CPL_ERR_ARP_MISS:
623 return -EHOSTUNREACH;
624 case CPL_ERR_CONN_TIMEDOUT:
625 return -ETIMEDOUT;
626 case CPL_ERR_TCAM_FULL:
627 return -ENOMEM;
628 case CPL_ERR_CONN_EXIST:
629 return -EADDRINUSE;
630 default:
631 return -EIO;
632 }
633}
634
635static void csk_act_open_retry_timer(unsigned long data)
636{
637 struct sk_buff *skb;
638 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
639
640 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
641 "csk 0x%p,%u,0x%lx,%u.\n",
642 csk, csk->state, csk->flags, csk->tid);
643
644 cxgbi_sock_get(csk);
645 spin_lock_bh(&csk->lock);
24d3f95a 646 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
7b36b6e0 647 if (!skb)
648 cxgbi_sock_fail_act_open(csk, -ENOMEM);
649 else {
650 skb->sk = (struct sock *)csk;
651 t4_set_arp_err_handler(skb, csk,
652 cxgbi_sock_act_open_req_arp_failure);
653 send_act_open_req(csk, skb, csk->l2t);
654 }
655 spin_unlock_bh(&csk->lock);
656 cxgbi_sock_put(csk);
657}
658
659static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
660{
661 struct cxgbi_sock *csk;
662 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
663 unsigned int tid = GET_TID(rpl);
664 unsigned int atid =
665 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
666 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
667 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
668 struct tid_info *t = lldi->tids;
669
670 csk = lookup_atid(t, atid);
671 if (unlikely(!csk)) {
672 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
673 goto rel_skb;
674 }
675
e27d6169 676 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
677 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
678 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
679 atid, tid, status, csk, csk->state, csk->flags);
7b36b6e0 680
150cca7c
KX		 681 if (status == CPL_ERR_RTX_NEG_ADVICE)
682 goto rel_skb;
683
7b36b6e0 684 if (status && status != CPL_ERR_TCAM_FULL &&
685 status != CPL_ERR_CONN_EXIST &&
686 status != CPL_ERR_ARP_MISS)
687 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
688
689 cxgbi_sock_get(csk);
690 spin_lock_bh(&csk->lock);
691
692 if (status == CPL_ERR_CONN_EXIST &&
693 csk->retry_timer.function != csk_act_open_retry_timer) {
694 csk->retry_timer.function = csk_act_open_retry_timer;
695 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
696 } else
697 cxgbi_sock_fail_act_open(csk,
698 act_open_rpl_status_to_errno(status));
699
700 spin_unlock_bh(&csk->lock);
701 cxgbi_sock_put(csk);
702rel_skb:
703 __kfree_skb(skb);
704}
705
706static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
707{
708 struct cxgbi_sock *csk;
709 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
710 unsigned int tid = GET_TID(req);
711 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
712 struct tid_info *t = lldi->tids;
713
714 csk = lookup_tid(t, tid);
715 if (unlikely(!csk)) {
716 pr_err("can't find connection for tid %u.\n", tid);
717 goto rel_skb;
718 }
719 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
720 "csk 0x%p,%u,0x%lx,%u.\n",
721 csk, csk->state, csk->flags, csk->tid);
722 cxgbi_sock_rcv_peer_close(csk);
723rel_skb:
724 __kfree_skb(skb);
725}
726
727static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
728{
729 struct cxgbi_sock *csk;
730 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
731 unsigned int tid = GET_TID(rpl);
732 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
733 struct tid_info *t = lldi->tids;
734
735 csk = lookup_tid(t, tid);
736 if (unlikely(!csk)) {
737 pr_err("can't find connection for tid %u.\n", tid);
738 goto rel_skb;
739 }
740 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
741 "csk 0x%p,%u,0x%lx,%u.\n",
742 csk, csk->state, csk->flags, csk->tid);
743 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
744rel_skb:
745 __kfree_skb(skb);
746}
747
748static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
749 int *need_rst)
750{
751 switch (abort_reason) {
752 case CPL_ERR_BAD_SYN: /* fall through */
753 case CPL_ERR_CONN_RESET:
754 return csk->state > CTP_ESTABLISHED ?
755 -EPIPE : -ECONNRESET;
756 case CPL_ERR_XMIT_TIMEDOUT:
757 case CPL_ERR_PERSIST_TIMEDOUT:
758 case CPL_ERR_FINWAIT2_TIMEDOUT:
759 case CPL_ERR_KEEPALIVE_TIMEDOUT:
760 return -ETIMEDOUT;
761 default:
762 return -EIO;
763 }
764}
765
766static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
767{
768 struct cxgbi_sock *csk;
769 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
770 unsigned int tid = GET_TID(req);
771 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
772 struct tid_info *t = lldi->tids;
773 int rst_status = CPL_ABORT_NO_RST;
774
775 csk = lookup_tid(t, tid);
776 if (unlikely(!csk)) {
777 pr_err("can't find connection for tid %u.\n", tid);
778 goto rel_skb;
779 }
780
781 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
782 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
783 csk, csk->state, csk->flags, csk->tid, req->status);
784
785 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
786 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
787 goto rel_skb;
788
789 cxgbi_sock_get(csk);
790 spin_lock_bh(&csk->lock);
791
792 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
793 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
794 cxgbi_sock_set_state(csk, CTP_ABORTING);
795 goto done;
796 }
797
798 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
799 send_abort_rpl(csk, rst_status);
800
801 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
802 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
803 cxgbi_sock_closed(csk);
804 }
805done:
806 spin_unlock_bh(&csk->lock);
807 cxgbi_sock_put(csk);
808rel_skb:
809 __kfree_skb(skb);
810}
811
812static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
813{
814 struct cxgbi_sock *csk;
815 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
816 unsigned int tid = GET_TID(rpl);
817 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
818 struct tid_info *t = lldi->tids;
819
820 csk = lookup_tid(t, tid);
821 if (!csk)
822 goto rel_skb;
823
824 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
825 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
826 rpl->status, csk, csk ? csk->state : 0,
827 csk ? csk->flags : 0UL);
828
829 if (rpl->status == CPL_ERR_ABORT_FAILED)
830 goto rel_skb;
831
832 cxgbi_sock_rcv_abort_rpl(csk);
833rel_skb:
834 __kfree_skb(skb);
835}
836
837static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
838{
839 struct cxgbi_sock *csk;
840 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
841 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
842 unsigned int tid = GET_TID(cpl);
843 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
844 struct tid_info *t = lldi->tids;
7b36b6e0 845
846 csk = lookup_tid(t, tid);
847 if (unlikely(!csk)) {
848 pr_err("can't find conn. for tid %u.\n", tid);
849 goto rel_skb;
850 }
851
852 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
853 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
854 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
855 pdu_len_ddp);
856
857 spin_lock_bh(&csk->lock);
858
859 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
860 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
861 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
862 csk, csk->state, csk->flags, csk->tid);
863 if (csk->state != CTP_ABORTING)
864 goto abort_conn;
865 else
866 goto discard;
867 }
868
869 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 870 cxgbi_skcb_flags(skb) = 0;
871
7b36b6e0 872 skb_reset_transport_header(skb);
873 __skb_pull(skb, sizeof(*cpl));
874 __pskb_trim(skb, ntohs(cpl->len));
875
876 if (!csk->skb_ulp_lhdr) {
877 unsigned char *bhs;
878 unsigned int hlen, dlen;
879
880 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
881 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
882 csk, csk->state, csk->flags, csk->tid, skb);
883 csk->skb_ulp_lhdr = skb;
e27d6169 884 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 885
e27d6169 886 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 887 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 888 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 889 csk->rcv_nxt);
890 goto abort_conn;
891 }
892
e27d6169 893 bhs = skb->data;
7b36b6e0 894 hlen = ntohs(cpl->len);
895 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
896
897 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
898 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
899 "mismatch %u != %u + %u, seq 0x%x.\n",
900 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40,
901 hlen, dlen, cxgbi_skcb_tcp_seq(skb));
902 goto abort_conn;
903 }
904
905 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
906 if (dlen)
907 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
908 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
909
910 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
911 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
912 csk, skb, *bhs, hlen, dlen,
913 ntohl(*((unsigned int *)(bhs + 16))),
914 ntohl(*((unsigned int *)(bhs + 24))));
915
916 } else {
e27d6169 917 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 918
e27d6169 919 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 920 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
921 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
922 csk, csk->state, csk->flags, skb, lskb);
923 }
924
925 __skb_queue_tail(&csk->receive_queue, skb);
926 spin_unlock_bh(&csk->lock);
927 return;
928
929abort_conn:
930 send_abort_req(csk);
931discard:
932 spin_unlock_bh(&csk->lock);
933rel_skb:
934 __kfree_skb(skb);
935}
936
937static void do_rx_data_ddp(struct cxgbi_device *cdev,
938 struct sk_buff *skb)
939{
940 struct cxgbi_sock *csk;
941 struct sk_buff *lskb;
942 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
943 unsigned int tid = GET_TID(rpl);
944 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
945 struct tid_info *t = lldi->tids;
946 unsigned int status = ntohl(rpl->ddpvld);
947
948 csk = lookup_tid(t, tid);
949 if (unlikely(!csk)) {
950 pr_err("can't find connection for tid %u.\n", tid);
951 goto rel_skb;
952 }
953
954 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
955 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
956 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
957
958 spin_lock_bh(&csk->lock);
959
960 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
961 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
962 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
963 csk, csk->state, csk->flags, csk->tid);
964 if (csk->state != CTP_ABORTING)
965 goto abort_conn;
966 else
967 goto discard;
968 }
969
970 if (!csk->skb_ulp_lhdr) {
971 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
972 goto abort_conn;
973 }
974
975 lskb = csk->skb_ulp_lhdr;
976 csk->skb_ulp_lhdr = NULL;
977
7b36b6e0 978 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
979
980 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
981 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
982 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
983
984 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
e27d6169 985 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
986 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 987 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
988 }
989 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
e27d6169 990 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
991 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 992 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
993 }
994 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
995 log_debug(1 << CXGBI_DBG_PDU_RX,
996 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
997 csk, lskb, status);
998 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
999 }
1000 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1001 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1002 log_debug(1 << CXGBI_DBG_PDU_RX,
1003 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1004 csk, lskb, status);
1005 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1006 }
1007 log_debug(1 << CXGBI_DBG_PDU_RX,
1008 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1009 csk, lskb, cxgbi_skcb_flags(lskb));
1010
e27d6169 1011 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1012 cxgbi_conn_pdu_ready(csk);
1013 spin_unlock_bh(&csk->lock);
1014 goto rel_skb;
1015
1016abort_conn:
1017 send_abort_req(csk);
1018discard:
1019 spin_unlock_bh(&csk->lock);
1020rel_skb:
1021 __kfree_skb(skb);
1022}
1023
1024static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1025{
1026 struct cxgbi_sock *csk;
1027 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1028 unsigned int tid = GET_TID(rpl);
1029 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1030 struct tid_info *t = lldi->tids;
1031
1032 csk = lookup_tid(t, tid);
1033 if (unlikely(!csk))
1034 pr_err("can't find connection for tid %u.\n", tid);
1035 else {
1036 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1037 "csk 0x%p,%u,0x%lx,%u.\n",
1038 csk, csk->state, csk->flags, csk->tid);
1039 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1040 rpl->seq_vld);
1041 }
1042 __kfree_skb(skb);
1043}
1044
1045static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1046{
1047 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1048 unsigned int tid = GET_TID(rpl);
1049 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1050 struct tid_info *t = lldi->tids;
1051 struct cxgbi_sock *csk;
1052
1053 csk = lookup_tid(t, tid);
1054 if (!csk)
1055 pr_err("can't find conn. for tid %u.\n", tid);
1056
1057 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1058 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1059 csk, csk->state, csk->flags, csk->tid, rpl->status);
1060
1061 if (rpl->status != CPL_ERR_NONE)
1062 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1063 csk, tid, rpl->status);
1064
1065 __kfree_skb(skb);
1066}
1067
1068static int alloc_cpls(struct cxgbi_sock *csk)
1069{
24d3f95a 1070 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1071 0, GFP_KERNEL);
7b36b6e0 1072 if (!csk->cpl_close)
1073 return -ENOMEM;
1074
24d3f95a 1075 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1076 0, GFP_KERNEL);
7b36b6e0 1077 if (!csk->cpl_abort_req)
1078 goto free_cpls;
1079
24d3f95a 1080 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1081 0, GFP_KERNEL);
7b36b6e0 1082 if (!csk->cpl_abort_rpl)
1083 goto free_cpls;
1084 return 0;
1085
1086free_cpls:
1087 cxgbi_sock_free_cpl_skbs(csk);
1088 return -ENOMEM;
1089}
1090
1091static inline void l2t_put(struct cxgbi_sock *csk)
1092{
1093 if (csk->l2t) {
1094 cxgb4_l2t_release(csk->l2t);
1095 csk->l2t = NULL;
1096 cxgbi_sock_put(csk);
1097 }
1098}
1099
1100static void release_offload_resources(struct cxgbi_sock *csk)
1101{
1102 struct cxgb4_lld_info *lldi;
1103
1104 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1105 "csk 0x%p,%u,0x%lx,%u.\n",
1106 csk, csk->state, csk->flags, csk->tid);
1107
1108 cxgbi_sock_free_cpl_skbs(csk);
1109 if (csk->wr_cred != csk->wr_max_cred) {
1110 cxgbi_sock_purge_wr_queue(csk);
1111 cxgbi_sock_reset_wr_list(csk);
1112 }
1113
1114 l2t_put(csk);
1115 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1116 free_atid(csk);
1117 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1118 lldi = cxgbi_cdev_priv(csk->cdev);
1119 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1120 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1121 cxgbi_sock_put(csk);
1122 }
1123 csk->dst = NULL;
1124 csk->cdev = NULL;
1125}
1126
1127static int init_act_open(struct cxgbi_sock *csk)
1128{
1129 struct cxgbi_device *cdev = csk->cdev;
1130 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1131 struct net_device *ndev = cdev->ports[csk->port_id];
1132 struct port_info *pi = netdev_priv(ndev);
1133 struct sk_buff *skb = NULL;
1134 unsigned int step;
1135
1136 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1137 "csk 0x%p,%u,0x%lx,%u.\n",
1138 csk, csk->state, csk->flags, csk->tid);
1139
1140 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1141 if (csk->atid < 0) {
1142 pr_err("%s, NO atid available.\n", ndev->name);
1143 return -EINVAL;
1144 }
1145 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1146 cxgbi_sock_get(csk);
1147
69cce1d1 1148 csk->l2t = cxgb4_l2t_get(lldi->l2t, dst_get_neighbour(csk->dst), ndev, 0);
7b36b6e0 1149 if (!csk->l2t) {
1150 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1151 goto rel_resource;
1152 }
1153 cxgbi_sock_get(csk);
1154
24d3f95a 1155 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
7b36b6e0 1156 if (!skb)
1157 goto rel_resource;
1158 skb->sk = (struct sock *)csk;
1159 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1160
1161 if (!csk->mtu)
1162 csk->mtu = dst_mtu(csk->dst);
1163 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1164 csk->tx_chan = cxgb4_port_chan(ndev);
1165 /* SMT two entries per row */
1166 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1167 step = lldi->ntxq / lldi->nchan;
1168 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1169 step = lldi->nrxq / lldi->nchan;
1170 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1171 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1172 csk->wr_una_cred = 0;
1173 cxgbi_sock_reset_wr_list(csk);
1174 csk->err = 0;
1175 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1176 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1177 csk, pi->port_id, ndev->name, csk->tx_chan,
1178 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1179 csk->smac_idx);
1180
1181 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1182 send_act_open_req(csk, skb, csk->l2t);
1183 return 0;
1184
1185rel_resource:
1186 if (skb)
1187 __kfree_skb(skb);
1188 return -EINVAL;
1189}
1190
1191cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1192 [CPL_ACT_ESTABLISH] = do_act_establish,
1193 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1194 [CPL_PEER_CLOSE] = do_peer_close,
1195 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1196 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1197 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1198 [CPL_FW4_ACK] = do_fw4_ack,
1199 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1200 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1201 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1202};
1203
1204int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1205{
1206 int rc;
1207
1208 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1209 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1210
1211 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1212 cxgb4i_max_connect);
1213 if (rc < 0)
1214 return rc;
1215
1216 cdev->csk_release_offload_resources = release_offload_resources;
1217 cdev->csk_push_tx_frames = push_tx_frames;
1218 cdev->csk_send_abort_req = send_abort_req;
1219 cdev->csk_send_close_req = send_close_req;
1220 cdev->csk_send_rx_credits = send_rx_credits;
1221 cdev->csk_alloc_cpls = alloc_cpls;
1222 cdev->csk_init_act_open = init_act_open;
1223
1224 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1225 return 0;
1226}
1227
1228/*
1229 * functions to program the pagepod in h/w
1230 */
e27d6169 1231#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
7b36b6e0 1232static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
e27d6169 1233 unsigned int wr_len, unsigned int dlen,
1234 unsigned int pm_addr)
7b36b6e0 1235{
e27d6169 1236 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
7b36b6e0 1237
1238 INIT_ULPTX_WR(req, wr_len, 0, 0);
e27d6169 1239 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23));
7b36b6e0 1240 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1241 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1242 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
e27d6169 1243
1244 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1245 idata->len = htonl(dlen);
7b36b6e0 1246}
1247
e27d6169 1248static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
7b36b6e0 1249 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1250 unsigned int npods,
1251 struct cxgbi_gather_list *gl,
1252 unsigned int gl_pidx)
1253{
1254 struct cxgbi_ddp_info *ddp = cdev->ddp;
7b36b6e0 1255 struct sk_buff *skb;
1256 struct ulp_mem_io *req;
e27d6169 1257 struct ulptx_idata *idata;
7b36b6e0 1258 struct cxgbi_pagepod *ppod;
e27d6169 1259 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1260 unsigned int dlen = PPOD_SIZE * npods;
1261 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1262 sizeof(struct ulptx_idata) + dlen, 16);
7b36b6e0 1263 unsigned int i;
1264
e27d6169 1265 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
7b36b6e0 1266 if (!skb) {
1267 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1268 cdev, idx, npods);
1269 return -ENOMEM;
1270 }
1271 req = (struct ulp_mem_io *)skb->head;
1272 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1273
e27d6169 1274 ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr);
1275 idata = (struct ulptx_idata *)(req + 1);
1276 ppod = (struct cxgbi_pagepod *)(idata + 1);
7b36b6e0 1277
1278 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1279 if (!hdr && !gl)
1280 cxgbi_ddp_ppod_clear(ppod);
1281 else
1282 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1283 }
1284
1285 cxgb4_ofld_send(cdev->ports[port_id], skb);
1286 return 0;
1287}
1288
1289static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1290 unsigned int idx, unsigned int npods,
1291 struct cxgbi_gather_list *gl)
1292{
1293 unsigned int i, cnt;
1294 int err = 0;
1295
1296 for (i = 0; i < npods; i += cnt, idx += cnt) {
1297 cnt = npods - i;
e27d6169 1298 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1299 cnt = ULPMEM_IDATA_MAX_NPPODS;
1300 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
7b36b6e0 1301 idx, cnt, gl, 4 * i);
1302 if (err < 0)
1303 break;
1304 }
1305 return err;
1306}
1307
1308static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1309 unsigned int idx, unsigned int npods)
1310{
1311 unsigned int i, cnt;
1312 int err;
1313
1314 for (i = 0; i < npods; i += cnt, idx += cnt) {
1315 cnt = npods - i;
e27d6169 1316 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1317 cnt = ULPMEM_IDATA_MAX_NPPODS;
1318 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
7b36b6e0 1319 idx, cnt, NULL, 0);
1320 if (err < 0)
1321 break;
1322 }
1323}
1324
1325static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1326 int pg_idx, bool reply)
1327{
1328 struct sk_buff *skb;
1329 struct cpl_set_tcb_field *req;
7b36b6e0 1330
e27d6169 1331 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1332 return 0;
1333
24d3f95a 1334 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1335 if (!skb)
1336 return -ENOMEM;
1337
e27d6169 1338 /* set up ulp page size */
7b36b6e0 1339 req = (struct cpl_set_tcb_field *)skb->head;
1340 INIT_TP_WR(req, csk->tid);
1341 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1342 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1343 req->word_cookie = htons(0);
1344 req->mask = cpu_to_be64(0x3 << 8);
1345 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1346 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1347
1348 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1349 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1350
1351 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1352 return 0;
1353}
1354
1355static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1356 int hcrc, int dcrc, int reply)
1357{
1358 struct sk_buff *skb;
1359 struct cpl_set_tcb_field *req;
7b36b6e0 1360
e27d6169 1361 if (!hcrc && !dcrc)
1362 return 0;
7b36b6e0 1363
24d3f95a 1364 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1365 if (!skb)
1366 return -ENOMEM;
1367
1368 csk->hcrc_len = (hcrc ? 4 : 0);
1369 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1370 /* set up ulp submode */
7b36b6e0 1371 req = (struct cpl_set_tcb_field *)skb->head;
1372 INIT_TP_WR(req, tid);
1373 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1374 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1375 req->word_cookie = htons(0);
1376 req->mask = cpu_to_be64(0x3 << 4);
1377 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1378 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1379 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1380
1381 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1382 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1383
1384 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1385 return 0;
1386}
1387
1388static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1389{
1390 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1391 struct cxgbi_ddp_info *ddp = cdev->ddp;
1392 unsigned int tagmask, pgsz_factor[4];
1393 int err;
1394
1395 if (ddp) {
1396 kref_get(&ddp->refcnt);
1397 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1398 cdev, cdev->ddp);
1399 return -EALREADY;
1400 }
1401
1402 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1403 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1404 lldi->iscsi_iolen, lldi->iscsi_iolen);
1405 if (err < 0)
1406 return err;
1407
1408 ddp = cdev->ddp;
1409
1410 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1411 cxgbi_ddp_page_size_factor(pgsz_factor);
1412 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1413
7b36b6e0 1414 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1415 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1416 cdev->csk_ddp_set = ddp_set_map;
1417 cdev->csk_ddp_clear = ddp_clear_map;
1418
1419 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1420 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1421 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1422 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1423 " %u/%u.\n",
1424 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1425 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1426 ddp->max_rxsz, lldi->iscsi_iolen);
1427 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1428 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1429 ddp->max_rxsz);
1430 return 0;
1431}
1432
1433static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1434{
1435 struct cxgbi_device *cdev;
1436 struct port_info *pi;
1437 int i, rc;
1438
1439 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1440 if (!cdev) {
1441 pr_info("t4 device 0x%p, register failed.\n", lldi);
1442 return NULL;
1443 }
1444 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1445 cdev, lldi->adapter_type, lldi->nports,
1446 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1447 lldi->nrxq, lldi->wr_cred);
1448 for (i = 0; i < lldi->nrxq; i++)
1449 log_debug(1 << CXGBI_DBG_DEV,
1450 "t4 0x%p, rxq id #%d: %u.\n",
1451 cdev, i, lldi->rxq_ids[i]);
1452
1453 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1454 cdev->flags = CXGBI_FLAG_DEV_T4;
1455 cdev->pdev = lldi->pdev;
1456 cdev->ports = lldi->ports;
1457 cdev->nports = lldi->nports;
1458 cdev->mtus = lldi->mtus;
1459 cdev->nmtus = NMTUS;
1460 cdev->snd_win = cxgb4i_snd_win;
1461 cdev->rcv_win = cxgb4i_rcv_win;
1462 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1463 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1464 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1465 cdev->itp = &cxgb4i_iscsi_transport;
1466
e27d6169 1467 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1468 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1469 cdev, lldi->ports[0]->name, cdev->pfvf);
1470
7b36b6e0 1471 rc = cxgb4i_ddp_init(cdev);
1472 if (rc) {
1473 pr_info("t4 0x%p ddp init failed.\n", cdev);
1474 goto err_out;
1475 }
1476 rc = cxgb4i_ofld_init(cdev);
1477 if (rc) {
1478 pr_info("t4 0x%p ofld init failed.\n", cdev);
1479 goto err_out;
1480 }
1481
1482 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1483 &cxgb4i_host_template, cxgb4i_stt);
1484 if (rc)
1485 goto err_out;
1486
1487 for (i = 0; i < cdev->nports; i++) {
1488 pi = netdev_priv(lldi->ports[i]);
1489 cdev->hbas[i]->port_id = pi->port_id;
1490 }
1491 return cdev;
1492
1493err_out:
1494 cxgbi_device_unregister(cdev);
1495 return ERR_PTR(-ENOMEM);
1496}
1497
1498#define RX_PULL_LEN 128
1499static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1500 const struct pkt_gl *pgl)
1501{
1502 const struct cpl_act_establish *rpl;
1503 struct sk_buff *skb;
1504 unsigned int opc;
1505 struct cxgbi_device *cdev = handle;
1506
1507 if (pgl == NULL) {
1508 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1509
24d3f95a 1510 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 1511 if (!skb)
1512 goto nomem;
1513 skb_copy_to_linear_data(skb, &rsp[1], len);
1514 } else {
1515 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1516 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1517 pgl->va, be64_to_cpu(*rsp),
1518 be64_to_cpu(*(u64 *)pgl->va),
1519 pgl->tot_len);
1520 return 0;
1521 }
1522 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1523 if (unlikely(!skb))
1524 goto nomem;
1525 }
1526
1527 rpl = (struct cpl_act_establish *)skb->data;
1528 opc = rpl->ot.opcode;
1529 log_debug(1 << CXGBI_DBG_TOE,
1530 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1531 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1532 if (cxgb4i_cplhandlers[opc])
1533 cxgb4i_cplhandlers[opc](cdev, skb);
1534 else {
1535 pr_err("No handler for opcode 0x%x.\n", opc);
1536 __kfree_skb(skb);
1537 }
1538 return 0;
1539nomem:
1540 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1541 return 1;
1542}
1543
1544static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1545{
1546 struct cxgbi_device *cdev = handle;
1547
1548 switch (state) {
1549 case CXGB4_STATE_UP:
1550 pr_info("cdev 0x%p, UP.\n", cdev);
1551 /* re-initialize */
1552 break;
1553 case CXGB4_STATE_START_RECOVERY:
1554 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1555 /* close all connections */
1556 break;
1557 case CXGB4_STATE_DOWN:
1558 pr_info("cdev 0x%p, DOWN.\n", cdev);
1559 break;
1560 case CXGB4_STATE_DETACH:
1561 pr_info("cdev 0x%p, DETACH.\n", cdev);
1562 break;
1563 default:
1564 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1565 break;
1566 }
1567 return 0;
1568}
1569
1570static int __init cxgb4i_init_module(void)
1571{
1572 int rc;
1573
1574 printk(KERN_INFO "%s", version);
1575
1576 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1577 if (rc < 0)
1578 return rc;
1579 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1580 return 0;
1581}
1582
1583static void __exit cxgb4i_exit_module(void)
1584{
1585 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1586 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1587 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1588}
1589
1590module_init(cxgb4i_init_module);
1591module_exit(cxgb4i_exit_module);
Linux kernel - Deliverables
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