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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_regs.h"
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/T5 iSCSI Driver"
37#define DRV_MODULE_VERSION "0.9.4"
38
39static char version[] =
40 DRV_MODULE_DESC " " DRV_MODULE_NAME
41 " v" DRV_MODULE_VERSION "\n";
42
43MODULE_AUTHOR("Chelsio Communications, Inc.");
44MODULE_DESCRIPTION(DRV_MODULE_DESC);
45MODULE_VERSION(DRV_MODULE_VERSION);
46MODULE_LICENSE("GPL");
47
48module_param(dbg_level, uint, 0644);
49MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
50
51static int cxgb4i_rcv_win = 256 * 1024;
52module_param(cxgb4i_rcv_win, int, 0644);
53MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
54
55static int cxgb4i_snd_win = 128 * 1024;
56module_param(cxgb4i_snd_win, int, 0644);
57MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
58
59static int cxgb4i_rx_credit_thres = 10 * 1024;
60module_param(cxgb4i_rx_credit_thres, int, 0644);
61MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
62 "RX credits return threshold in bytes (default=10KB)");
63
64static unsigned int cxgb4i_max_connect = (8 * 1024);
65module_param(cxgb4i_max_connect, uint, 0644);
66MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
67
68static unsigned short cxgb4i_sport_base = 20000;
69module_param(cxgb4i_sport_base, ushort, 0644);
70MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
71
72typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
73
74static void *t4_uld_add(const struct cxgb4_lld_info *);
75static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
76static int t4_uld_state_change(void *, enum cxgb4_state state);
77
78static const struct cxgb4_uld_info cxgb4i_uld_info = {
79 .name = DRV_MODULE_NAME,
80 .add = t4_uld_add,
81 .rx_handler = t4_uld_rx_handler,
82 .state_change = t4_uld_state_change,
83};
84
85static struct scsi_host_template cxgb4i_host_template = {
86 .module = THIS_MODULE,
87 .name = DRV_MODULE_NAME,
88 .proc_name = DRV_MODULE_NAME,
89 .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
90 .queuecommand = iscsi_queuecommand,
91 .change_queue_depth = iscsi_change_queue_depth,
92 .sg_tablesize = SG_ALL,
93 .max_sectors = 0xFFFF,
94 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
95 .eh_abort_handler = iscsi_eh_abort,
96 .eh_device_reset_handler = iscsi_eh_device_reset,
97 .eh_target_reset_handler = iscsi_eh_recover_target,
98 .target_alloc = iscsi_target_alloc,
99 .use_clustering = DISABLE_CLUSTERING,
100 .this_id = -1,
101};
102
103static struct iscsi_transport cxgb4i_iscsi_transport = {
104 .owner = THIS_MODULE,
105 .name = DRV_MODULE_NAME,
106 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
107 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
108 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
109 .attr_is_visible = cxgbi_attr_is_visible,
110 .get_host_param = cxgbi_get_host_param,
111 .set_host_param = cxgbi_set_host_param,
112
113 .create_session = cxgbi_create_session,
114 .destroy_session = cxgbi_destroy_session,
115 .get_session_param = iscsi_session_get_param,
116
117 .create_conn = cxgbi_create_conn,
118 .bind_conn = cxgbi_bind_conn,
119 .destroy_conn = iscsi_tcp_conn_teardown,
120 .start_conn = iscsi_conn_start,
121 .stop_conn = iscsi_conn_stop,
122 .get_conn_param = iscsi_conn_get_param,
123 .set_param = cxgbi_set_conn_param,
124 .get_stats = cxgbi_get_conn_stats,
125
126 .send_pdu = iscsi_conn_send_pdu,
127
128 .init_task = iscsi_tcp_task_init,
129 .xmit_task = iscsi_tcp_task_xmit,
130 .cleanup_task = cxgbi_cleanup_task,
131
132 .alloc_pdu = cxgbi_conn_alloc_pdu,
133 .init_pdu = cxgbi_conn_init_pdu,
134 .xmit_pdu = cxgbi_conn_xmit_pdu,
135 .parse_pdu_itt = cxgbi_parse_pdu_itt,
136
137 .get_ep_param = cxgbi_get_ep_param,
138 .ep_connect = cxgbi_ep_connect,
139 .ep_poll = cxgbi_ep_poll,
140 .ep_disconnect = cxgbi_ep_disconnect,
141
142 .session_recovery_timedout = iscsi_session_recovery_timedout,
143};
144
145static struct scsi_transport_template *cxgb4i_stt;
146
147
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150
151
152
153#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
154#define RCV_BUFSIZ_MASK 0x3FFU
155#define MAX_IMM_TX_PKT_LEN 128
156
157static inline void set_queue(struct sk_buff *skb, unsigned int queue,
158 const struct cxgbi_sock *csk)
159{
160 skb->queue_mapping = queue;
161}
162
163static int push_tx_frames(struct cxgbi_sock *, int);
164
165
166
167
168
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170
171
172static inline int is_ofld_imm(const struct sk_buff *skb)
173{
174 return skb->len <= (MAX_IMM_TX_PKT_LEN -
175 sizeof(struct fw_ofld_tx_data_wr));
176}
177
178
179#define VLAN_NONE 0xfff
180#define FILTER_SEL_VLAN_NONE 0xffff
181#define FILTER_SEL_WIDTH_P_FC (3+1)
182#define FILTER_SEL_WIDTH_VIN_P_FC \
183 (6 + 7 + FILTER_SEL_WIDTH_P_FC)
184#define FILTER_SEL_WIDTH_TAG_P_FC \
185 (3 + FILTER_SEL_WIDTH_VIN_P_FC)
186#define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)
187
188static unsigned int select_ntuple(struct cxgbi_device *cdev,
189 struct l2t_entry *l2t)
190{
191 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
192 unsigned int ntuple = 0;
193 u32 viid;
194
195 switch (lldi->filt_mode) {
196
197
198 case HW_TPL_FR_MT_PR_IV_P_FC:
199 if (l2t->vlan == VLAN_NONE)
200 ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
201 else {
202 ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC;
203 ntuple |= 1 << FILTER_SEL_WIDTH_VLD_TAG_P_FC;
204 }
205 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
206 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
207 break;
208 case HW_TPL_FR_MT_PR_OV_P_FC: {
209 viid = cxgb4_port_viid(l2t->neigh->dev);
210
211 ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC;
212 ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
213 ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
214 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
215 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
216 break;
217 }
218 default:
219 break;
220 }
221 return ntuple;
222}
223
224static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
225 struct l2t_entry *e)
226{
227 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
228 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
229 unsigned long long opt0;
230 unsigned int opt2;
231 unsigned int qid_atid = ((unsigned int)csk->atid) |
232 (((unsigned int)csk->rss_qid) << 14);
233
234 opt0 = KEEP_ALIVE(1) |
235 WND_SCALE(wscale) |
236 MSS_IDX(csk->mss_idx) |
237 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
238 TX_CHAN(csk->tx_chan) |
239 SMAC_SEL(csk->smac_idx) |
240 ULP_MODE(ULP_MODE_ISCSI) |
241 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
242 opt2 = RX_CHANNEL(0) |
243 RSS_QUEUE_VALID |
244 (1 << 20) |
245 RSS_QUEUE(csk->rss_qid);
246
247 if (is_t4(lldi->adapter_type)) {
248 struct cpl_act_open_req *req =
249 (struct cpl_act_open_req *)skb->head;
250
251 req = (struct cpl_act_open_req *)skb->head;
252
253 INIT_TP_WR(req, 0);
254 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
255 qid_atid));
256 req->local_port = csk->saddr.sin_port;
257 req->peer_port = csk->daddr.sin_port;
258 req->local_ip = csk->saddr.sin_addr.s_addr;
259 req->peer_ip = csk->daddr.sin_addr.s_addr;
260 req->opt0 = cpu_to_be64(opt0);
261 req->params = cpu_to_be32(select_ntuple(csk->cdev, csk->l2t));
262 opt2 |= 1 << 22;
263 req->opt2 = cpu_to_be32(opt2);
264
265 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
266 "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
267 csk, &req->local_ip, ntohs(req->local_port),
268 &req->peer_ip, ntohs(req->peer_port),
269 csk->atid, csk->rss_qid);
270 } else {
271 struct cpl_t5_act_open_req *req =
272 (struct cpl_t5_act_open_req *)skb->head;
273
274 req = (struct cpl_t5_act_open_req *)skb->head;
275
276 INIT_TP_WR(req, 0);
277 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
278 qid_atid));
279 req->local_port = csk->saddr.sin_port;
280 req->peer_port = csk->daddr.sin_port;
281 req->local_ip = csk->saddr.sin_addr.s_addr;
282 req->peer_ip = csk->daddr.sin_addr.s_addr;
283 req->opt0 = cpu_to_be64(opt0);
284 req->params = cpu_to_be32(select_ntuple(csk->cdev, csk->l2t));
285 opt2 |= 1 << 31;
286 req->opt2 = cpu_to_be32(opt2);
287
288 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
289 "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
290 csk, &req->local_ip, ntohs(req->local_port),
291 &req->peer_ip, ntohs(req->peer_port),
292 csk->atid, csk->rss_qid);
293 }
294
295 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
296 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
297}
298
299static void send_close_req(struct cxgbi_sock *csk)
300{
301 struct sk_buff *skb = csk->cpl_close;
302 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
303 unsigned int tid = csk->tid;
304
305 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
306 "csk 0x%p,%u,0x%lx, tid %u.\n",
307 csk, csk->state, csk->flags, csk->tid);
308 csk->cpl_close = NULL;
309 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
310 INIT_TP_WR(req, tid);
311 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
312 req->rsvd = 0;
313
314 cxgbi_sock_skb_entail(csk, skb);
315 if (csk->state >= CTP_ESTABLISHED)
316 push_tx_frames(csk, 1);
317}
318
319static void abort_arp_failure(void *handle, struct sk_buff *skb)
320{
321 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
322 struct cpl_abort_req *req;
323
324 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
325 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
326 csk, csk->state, csk->flags, csk->tid);
327 req = (struct cpl_abort_req *)skb->data;
328 req->cmd = CPL_ABORT_NO_RST;
329 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
330}
331
332static void send_abort_req(struct cxgbi_sock *csk)
333{
334 struct cpl_abort_req *req;
335 struct sk_buff *skb = csk->cpl_abort_req;
336
337 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
338 return;
339 cxgbi_sock_set_state(csk, CTP_ABORTING);
340 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
341 cxgbi_sock_purge_write_queue(csk);
342
343 csk->cpl_abort_req = NULL;
344 req = (struct cpl_abort_req *)skb->head;
345 set_queue(skb, CPL_PRIORITY_DATA, csk);
346 req->cmd = CPL_ABORT_SEND_RST;
347 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
348 INIT_TP_WR(req, csk->tid);
349 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
350 req->rsvd0 = htonl(csk->snd_nxt);
351 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
352
353 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
354 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
355 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
356 req->rsvd1);
357
358 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
359}
360
361static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
362{
363 struct sk_buff *skb = csk->cpl_abort_rpl;
364 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
365
366 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
367 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
368 csk, csk->state, csk->flags, csk->tid, rst_status);
369
370 csk->cpl_abort_rpl = NULL;
371 set_queue(skb, CPL_PRIORITY_DATA, csk);
372 INIT_TP_WR(rpl, csk->tid);
373 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
374 rpl->cmd = rst_status;
375 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
376}
377
378
379
380
381
382
383static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
384{
385 struct sk_buff *skb;
386 struct cpl_rx_data_ack *req;
387
388 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
389 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
390 csk, csk->state, csk->flags, csk->tid, credits);
391
392 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
393 if (!skb) {
394 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
395 return 0;
396 }
397 req = (struct cpl_rx_data_ack *)skb->head;
398
399 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
400 INIT_TP_WR(req, csk->tid);
401 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
402 csk->tid));
403 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
404 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
405 return credits;
406}
407
408
409
410
411
412
413
414static inline unsigned int sgl_len(unsigned int n)
415{
416 n--;
417 return (3 * n) / 2 + (n & 1) + 2;
418}
419
420
421
422
423
424
425
426
427
428static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
429{
430 unsigned int flits, cnt;
431
432 if (is_ofld_imm(skb))
433 return DIV_ROUND_UP(skb->len, 8);
434 flits = skb_transport_offset(skb) / 8;
435 cnt = skb_shinfo(skb)->nr_frags;
436 if (skb_tail_pointer(skb) != skb_transport_header(skb))
437 cnt++;
438 return flits + sgl_len(cnt);
439}
440
441static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
442{
443 struct sk_buff *skb;
444 struct fw_flowc_wr *flowc;
445 int flowclen, i;
446
447 flowclen = 80;
448 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
449 flowc = (struct fw_flowc_wr *)skb->head;
450 flowc->op_to_nparams =
451 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
452 flowc->flowid_len16 =
453 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
454 FW_WR_FLOWID(csk->tid));
455 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
456 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
457 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
458 flowc->mnemval[1].val = htonl(csk->tx_chan);
459 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
460 flowc->mnemval[2].val = htonl(csk->tx_chan);
461 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
462 flowc->mnemval[3].val = htonl(csk->rss_qid);
463 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
464 flowc->mnemval[4].val = htonl(csk->snd_nxt);
465 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
466 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
467 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
468 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
469 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
470 flowc->mnemval[7].val = htonl(csk->advmss);
471 flowc->mnemval[8].mnemonic = 0;
472 flowc->mnemval[8].val = 0;
473 for (i = 0; i < 9; i++) {
474 flowc->mnemval[i].r4[0] = 0;
475 flowc->mnemval[i].r4[1] = 0;
476 flowc->mnemval[i].r4[2] = 0;
477 }
478 set_queue(skb, CPL_PRIORITY_DATA, csk);
479
480 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
481 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
482 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
483 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
484 csk->advmss);
485
486 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
487}
488
489static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
490 int dlen, int len, u32 credits, int compl)
491{
492 struct fw_ofld_tx_data_wr *req;
493 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
494 unsigned int wr_ulp_mode = 0;
495
496 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
497
498 if (is_ofld_imm(skb)) {
499 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
500 FW_WR_COMPL(1) |
501 FW_WR_IMMDLEN(dlen));
502 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
503 FW_WR_LEN16(credits));
504 } else {
505 req->op_to_immdlen =
506 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
507 FW_WR_COMPL(1) |
508 FW_WR_IMMDLEN(0));
509 req->flowid_len16 =
510 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
511 FW_WR_LEN16(credits));
512 }
513 if (submode)
514 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
515 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
516 req->tunnel_to_proxy = htonl(wr_ulp_mode |
517 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1));
518 req->plen = htonl(len);
519 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
520 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
521}
522
523static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
524{
525 kfree_skb(skb);
526}
527
528static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
529{
530 int total_size = 0;
531 struct sk_buff *skb;
532
533 if (unlikely(csk->state < CTP_ESTABLISHED ||
534 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
535 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
536 1 << CXGBI_DBG_PDU_TX,
537 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
538 csk, csk->state, csk->flags, csk->tid);
539 return 0;
540 }
541
542 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
543 int dlen = skb->len;
544 int len = skb->len;
545 unsigned int credits_needed;
546
547 skb_reset_transport_header(skb);
548 if (is_ofld_imm(skb))
549 credits_needed = DIV_ROUND_UP(dlen +
550 sizeof(struct fw_ofld_tx_data_wr), 16);
551 else
552 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
553 + sizeof(struct fw_ofld_tx_data_wr),
554 16);
555
556 if (csk->wr_cred < credits_needed) {
557 log_debug(1 << CXGBI_DBG_PDU_TX,
558 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
559 csk, skb->len, skb->data_len,
560 credits_needed, csk->wr_cred);
561 break;
562 }
563 __skb_unlink(skb, &csk->write_queue);
564 set_queue(skb, CPL_PRIORITY_DATA, csk);
565 skb->csum = credits_needed;
566 csk->wr_cred -= credits_needed;
567 csk->wr_una_cred += credits_needed;
568 cxgbi_sock_enqueue_wr(csk, skb);
569
570 log_debug(1 << CXGBI_DBG_PDU_TX,
571 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
572 csk, skb->len, skb->data_len, credits_needed,
573 csk->wr_cred, csk->wr_una_cred);
574
575 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
576 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
577 send_tx_flowc_wr(csk);
578 skb->csum += 5;
579 csk->wr_cred -= 5;
580 csk->wr_una_cred += 5;
581 }
582 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
583 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
584 req_completion);
585 csk->snd_nxt += len;
586 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
587 }
588 total_size += skb->truesize;
589 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
590
591 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
592 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
593 csk, csk->state, csk->flags, csk->tid, skb, len);
594
595 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
596 }
597 return total_size;
598}
599
600static inline void free_atid(struct cxgbi_sock *csk)
601{
602 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
603
604 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
605 cxgb4_free_atid(lldi->tids, csk->atid);
606 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
607 cxgbi_sock_put(csk);
608 }
609}
610
611static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
612{
613 struct cxgbi_sock *csk;
614 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
615 unsigned short tcp_opt = ntohs(req->tcp_opt);
616 unsigned int tid = GET_TID(req);
617 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
618 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
619 struct tid_info *t = lldi->tids;
620 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
621
622 csk = lookup_atid(t, atid);
623 if (unlikely(!csk)) {
624 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
625 goto rel_skb;
626 }
627
628 if (csk->atid != atid) {
629 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
630 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
631 goto rel_skb;
632 }
633
634 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
635 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
636 csk, csk->state, csk->flags, tid, atid, rcv_isn);
637
638 cxgbi_sock_get(csk);
639 csk->tid = tid;
640 cxgb4_insert_tid(lldi->tids, csk, tid);
641 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
642
643 free_atid(csk);
644
645 spin_lock_bh(&csk->lock);
646 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
647 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
648 csk, csk->state, csk->flags, csk->tid);
649
650 if (csk->retry_timer.function) {
651 del_timer(&csk->retry_timer);
652 csk->retry_timer.function = NULL;
653 }
654
655 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
656
657
658
659
660 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
661 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
662
663 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
664 if (GET_TCPOPT_TSTAMP(tcp_opt))
665 csk->advmss -= 12;
666 if (csk->advmss < 128)
667 csk->advmss = 128;
668
669 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
670 "csk 0x%p, mss_idx %u, advmss %u.\n",
671 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
672
673 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
674
675 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
676 send_abort_req(csk);
677 else {
678 if (skb_queue_len(&csk->write_queue))
679 push_tx_frames(csk, 0);
680 cxgbi_conn_tx_open(csk);
681 }
682 spin_unlock_bh(&csk->lock);
683
684rel_skb:
685 __kfree_skb(skb);
686}
687
688static int act_open_rpl_status_to_errno(int status)
689{
690 switch (status) {
691 case CPL_ERR_CONN_RESET:
692 return -ECONNREFUSED;
693 case CPL_ERR_ARP_MISS:
694 return -EHOSTUNREACH;
695 case CPL_ERR_CONN_TIMEDOUT:
696 return -ETIMEDOUT;
697 case CPL_ERR_TCAM_FULL:
698 return -ENOMEM;
699 case CPL_ERR_CONN_EXIST:
700 return -EADDRINUSE;
701 default:
702 return -EIO;
703 }
704}
705
706static void csk_act_open_retry_timer(unsigned long data)
707{
708 struct sk_buff *skb;
709 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
710 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
711
712 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
713 "csk 0x%p,%u,0x%lx,%u.\n",
714 csk, csk->state, csk->flags, csk->tid);
715
716 cxgbi_sock_get(csk);
717 spin_lock_bh(&csk->lock);
718 skb = alloc_wr(is_t4(lldi->adapter_type) ?
719 sizeof(struct cpl_act_open_req) :
720 sizeof(struct cpl_t5_act_open_req),
721 0, GFP_ATOMIC);
722 if (!skb)
723 cxgbi_sock_fail_act_open(csk, -ENOMEM);
724 else {
725 skb->sk = (struct sock *)csk;
726 t4_set_arp_err_handler(skb, csk,
727 cxgbi_sock_act_open_req_arp_failure);
728 send_act_open_req(csk, skb, csk->l2t);
729 }
730 spin_unlock_bh(&csk->lock);
731 cxgbi_sock_put(csk);
732}
733
734static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
735{
736 struct cxgbi_sock *csk;
737 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
738 unsigned int tid = GET_TID(rpl);
739 unsigned int atid =
740 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
741 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
742 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
743 struct tid_info *t = lldi->tids;
744
745 csk = lookup_atid(t, atid);
746 if (unlikely(!csk)) {
747 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
748 goto rel_skb;
749 }
750
751 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
752 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
753 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
754 atid, tid, status, csk, csk->state, csk->flags);
755
756 if (status == CPL_ERR_RTX_NEG_ADVICE)
757 goto rel_skb;
758
759 if (status && status != CPL_ERR_TCAM_FULL &&
760 status != CPL_ERR_CONN_EXIST &&
761 status != CPL_ERR_ARP_MISS)
762 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
763
764 cxgbi_sock_get(csk);
765 spin_lock_bh(&csk->lock);
766
767 if (status == CPL_ERR_CONN_EXIST &&
768 csk->retry_timer.function != csk_act_open_retry_timer) {
769 csk->retry_timer.function = csk_act_open_retry_timer;
770 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
771 } else
772 cxgbi_sock_fail_act_open(csk,
773 act_open_rpl_status_to_errno(status));
774
775 spin_unlock_bh(&csk->lock);
776 cxgbi_sock_put(csk);
777rel_skb:
778 __kfree_skb(skb);
779}
780
781static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
782{
783 struct cxgbi_sock *csk;
784 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
785 unsigned int tid = GET_TID(req);
786 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
787 struct tid_info *t = lldi->tids;
788
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 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
795 "csk 0x%p,%u,0x%lx,%u.\n",
796 csk, csk->state, csk->flags, csk->tid);
797 cxgbi_sock_rcv_peer_close(csk);
798rel_skb:
799 __kfree_skb(skb);
800}
801
802static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
803{
804 struct cxgbi_sock *csk;
805 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
806 unsigned int tid = GET_TID(rpl);
807 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
808 struct tid_info *t = lldi->tids;
809
810 csk = lookup_tid(t, tid);
811 if (unlikely(!csk)) {
812 pr_err("can't find connection for tid %u.\n", tid);
813 goto rel_skb;
814 }
815 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
816 "csk 0x%p,%u,0x%lx,%u.\n",
817 csk, csk->state, csk->flags, csk->tid);
818 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
819rel_skb:
820 __kfree_skb(skb);
821}
822
823static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
824 int *need_rst)
825{
826 switch (abort_reason) {
827 case CPL_ERR_BAD_SYN:
828 case CPL_ERR_CONN_RESET:
829 return csk->state > CTP_ESTABLISHED ?
830 -EPIPE : -ECONNRESET;
831 case CPL_ERR_XMIT_TIMEDOUT:
832 case CPL_ERR_PERSIST_TIMEDOUT:
833 case CPL_ERR_FINWAIT2_TIMEDOUT:
834 case CPL_ERR_KEEPALIVE_TIMEDOUT:
835 return -ETIMEDOUT;
836 default:
837 return -EIO;
838 }
839}
840
841static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
842{
843 struct cxgbi_sock *csk;
844 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
845 unsigned int tid = GET_TID(req);
846 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
847 struct tid_info *t = lldi->tids;
848 int rst_status = CPL_ABORT_NO_RST;
849
850 csk = lookup_tid(t, tid);
851 if (unlikely(!csk)) {
852 pr_err("can't find connection for tid %u.\n", tid);
853 goto rel_skb;
854 }
855
856 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
857 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
858 csk, csk->state, csk->flags, csk->tid, req->status);
859
860 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
861 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
862 goto rel_skb;
863
864 cxgbi_sock_get(csk);
865 spin_lock_bh(&csk->lock);
866
867 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
868 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
869 cxgbi_sock_set_state(csk, CTP_ABORTING);
870 goto done;
871 }
872
873 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
874 send_abort_rpl(csk, rst_status);
875
876 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
877 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
878 cxgbi_sock_closed(csk);
879 }
880done:
881 spin_unlock_bh(&csk->lock);
882 cxgbi_sock_put(csk);
883rel_skb:
884 __kfree_skb(skb);
885}
886
887static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
888{
889 struct cxgbi_sock *csk;
890 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
891 unsigned int tid = GET_TID(rpl);
892 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
893 struct tid_info *t = lldi->tids;
894
895 csk = lookup_tid(t, tid);
896 if (!csk)
897 goto rel_skb;
898
899 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
900 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
901 rpl->status, csk, csk ? csk->state : 0,
902 csk ? csk->flags : 0UL);
903
904 if (rpl->status == CPL_ERR_ABORT_FAILED)
905 goto rel_skb;
906
907 cxgbi_sock_rcv_abort_rpl(csk);
908rel_skb:
909 __kfree_skb(skb);
910}
911
912static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
913{
914 struct cxgbi_sock *csk;
915 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
916 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
917 unsigned int tid = GET_TID(cpl);
918 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
919 struct tid_info *t = lldi->tids;
920
921 csk = lookup_tid(t, tid);
922 if (unlikely(!csk)) {
923 pr_err("can't find conn. for tid %u.\n", tid);
924 goto rel_skb;
925 }
926
927 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
928 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
929 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
930 pdu_len_ddp);
931
932 spin_lock_bh(&csk->lock);
933
934 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
935 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
936 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
937 csk, csk->state, csk->flags, csk->tid);
938 if (csk->state != CTP_ABORTING)
939 goto abort_conn;
940 else
941 goto discard;
942 }
943
944 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
945 cxgbi_skcb_flags(skb) = 0;
946
947 skb_reset_transport_header(skb);
948 __skb_pull(skb, sizeof(*cpl));
949 __pskb_trim(skb, ntohs(cpl->len));
950
951 if (!csk->skb_ulp_lhdr) {
952 unsigned char *bhs;
953 unsigned int hlen, dlen, plen;
954
955 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
956 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
957 csk, csk->state, csk->flags, csk->tid, skb);
958 csk->skb_ulp_lhdr = skb;
959 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
960
961 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
962 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
963 csk->tid, cxgbi_skcb_tcp_seq(skb),
964 csk->rcv_nxt);
965 goto abort_conn;
966 }
967
968 bhs = skb->data;
969 hlen = ntohs(cpl->len);
970 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
971
972 plen = ISCSI_PDU_LEN(pdu_len_ddp);
973 if (is_t4(lldi->adapter_type))
974 plen -= 40;
975
976 if ((hlen + dlen) != plen) {
977 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
978 "mismatch %u != %u + %u, seq 0x%x.\n",
979 csk->tid, plen, hlen, dlen,
980 cxgbi_skcb_tcp_seq(skb));
981 goto abort_conn;
982 }
983
984 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
985 if (dlen)
986 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
987 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
988
989 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
990 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
991 csk, skb, *bhs, hlen, dlen,
992 ntohl(*((unsigned int *)(bhs + 16))),
993 ntohl(*((unsigned int *)(bhs + 24))));
994
995 } else {
996 struct sk_buff *lskb = csk->skb_ulp_lhdr;
997
998 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
999 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1000 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1001 csk, csk->state, csk->flags, skb, lskb);
1002 }
1003
1004 __skb_queue_tail(&csk->receive_queue, skb);
1005 spin_unlock_bh(&csk->lock);
1006 return;
1007
1008abort_conn:
1009 send_abort_req(csk);
1010discard:
1011 spin_unlock_bh(&csk->lock);
1012rel_skb:
1013 __kfree_skb(skb);
1014}
1015
1016static void do_rx_data_ddp(struct cxgbi_device *cdev,
1017 struct sk_buff *skb)
1018{
1019 struct cxgbi_sock *csk;
1020 struct sk_buff *lskb;
1021 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1022 unsigned int tid = GET_TID(rpl);
1023 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1024 struct tid_info *t = lldi->tids;
1025 unsigned int status = ntohl(rpl->ddpvld);
1026
1027 csk = lookup_tid(t, tid);
1028 if (unlikely(!csk)) {
1029 pr_err("can't find connection for tid %u.\n", tid);
1030 goto rel_skb;
1031 }
1032
1033 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1034 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1035 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1036
1037 spin_lock_bh(&csk->lock);
1038
1039 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1040 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1041 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1042 csk, csk->state, csk->flags, csk->tid);
1043 if (csk->state != CTP_ABORTING)
1044 goto abort_conn;
1045 else
1046 goto discard;
1047 }
1048
1049 if (!csk->skb_ulp_lhdr) {
1050 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1051 goto abort_conn;
1052 }
1053
1054 lskb = csk->skb_ulp_lhdr;
1055 csk->skb_ulp_lhdr = NULL;
1056
1057 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1058
1059 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1060 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1061 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1062
1063 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1064 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1065 csk, lskb, status, cxgbi_skcb_flags(lskb));
1066 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1067 }
1068 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1069 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1070 csk, lskb, status, cxgbi_skcb_flags(lskb));
1071 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1072 }
1073 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1074 log_debug(1 << CXGBI_DBG_PDU_RX,
1075 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1076 csk, lskb, status);
1077 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1078 }
1079 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1080 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1081 log_debug(1 << CXGBI_DBG_PDU_RX,
1082 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1083 csk, lskb, status);
1084 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1085 }
1086 log_debug(1 << CXGBI_DBG_PDU_RX,
1087 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1088 csk, lskb, cxgbi_skcb_flags(lskb));
1089
1090 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1091 cxgbi_conn_pdu_ready(csk);
1092 spin_unlock_bh(&csk->lock);
1093 goto rel_skb;
1094
1095abort_conn:
1096 send_abort_req(csk);
1097discard:
1098 spin_unlock_bh(&csk->lock);
1099rel_skb:
1100 __kfree_skb(skb);
1101}
1102
1103static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1104{
1105 struct cxgbi_sock *csk;
1106 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1107 unsigned int tid = GET_TID(rpl);
1108 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1109 struct tid_info *t = lldi->tids;
1110
1111 csk = lookup_tid(t, tid);
1112 if (unlikely(!csk))
1113 pr_err("can't find connection for tid %u.\n", tid);
1114 else {
1115 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1116 "csk 0x%p,%u,0x%lx,%u.\n",
1117 csk, csk->state, csk->flags, csk->tid);
1118 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1119 rpl->seq_vld);
1120 }
1121 __kfree_skb(skb);
1122}
1123
1124static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1125{
1126 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1127 unsigned int tid = GET_TID(rpl);
1128 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1129 struct tid_info *t = lldi->tids;
1130 struct cxgbi_sock *csk;
1131
1132 csk = lookup_tid(t, tid);
1133 if (!csk)
1134 pr_err("can't find conn. for tid %u.\n", tid);
1135
1136 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1137 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1138 csk, csk->state, csk->flags, csk->tid, rpl->status);
1139
1140 if (rpl->status != CPL_ERR_NONE)
1141 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1142 csk, tid, rpl->status);
1143
1144 __kfree_skb(skb);
1145}
1146
1147static int alloc_cpls(struct cxgbi_sock *csk)
1148{
1149 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1150 0, GFP_KERNEL);
1151 if (!csk->cpl_close)
1152 return -ENOMEM;
1153
1154 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1155 0, GFP_KERNEL);
1156 if (!csk->cpl_abort_req)
1157 goto free_cpls;
1158
1159 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1160 0, GFP_KERNEL);
1161 if (!csk->cpl_abort_rpl)
1162 goto free_cpls;
1163 return 0;
1164
1165free_cpls:
1166 cxgbi_sock_free_cpl_skbs(csk);
1167 return -ENOMEM;
1168}
1169
1170static inline void l2t_put(struct cxgbi_sock *csk)
1171{
1172 if (csk->l2t) {
1173 cxgb4_l2t_release(csk->l2t);
1174 csk->l2t = NULL;
1175 cxgbi_sock_put(csk);
1176 }
1177}
1178
1179static void release_offload_resources(struct cxgbi_sock *csk)
1180{
1181 struct cxgb4_lld_info *lldi;
1182
1183 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1184 "csk 0x%p,%u,0x%lx,%u.\n",
1185 csk, csk->state, csk->flags, csk->tid);
1186
1187 cxgbi_sock_free_cpl_skbs(csk);
1188 if (csk->wr_cred != csk->wr_max_cred) {
1189 cxgbi_sock_purge_wr_queue(csk);
1190 cxgbi_sock_reset_wr_list(csk);
1191 }
1192
1193 l2t_put(csk);
1194 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1195 free_atid(csk);
1196 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1197 lldi = cxgbi_cdev_priv(csk->cdev);
1198 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1199 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1200 cxgbi_sock_put(csk);
1201 }
1202 csk->dst = NULL;
1203 csk->cdev = NULL;
1204}
1205
1206static int init_act_open(struct cxgbi_sock *csk)
1207{
1208 struct cxgbi_device *cdev = csk->cdev;
1209 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1210 struct net_device *ndev = cdev->ports[csk->port_id];
1211 struct port_info *pi = netdev_priv(ndev);
1212 struct sk_buff *skb = NULL;
1213 struct neighbour *n;
1214 unsigned int step;
1215
1216 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1217 "csk 0x%p,%u,0x%lx,%u.\n",
1218 csk, csk->state, csk->flags, csk->tid);
1219
1220 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1221 if (csk->atid < 0) {
1222 pr_err("%s, NO atid available.\n", ndev->name);
1223 return -EINVAL;
1224 }
1225 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1226 cxgbi_sock_get(csk);
1227
1228 n = dst_neigh_lookup(csk->dst, &csk->daddr.sin_addr.s_addr);
1229 if (!n) {
1230 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1231 goto rel_resource;
1232 }
1233 csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1234 if (!csk->l2t) {
1235 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1236 goto rel_resource;
1237 }
1238 cxgbi_sock_get(csk);
1239
1240 skb = alloc_wr(is_t4(lldi->adapter_type) ?
1241 sizeof(struct cpl_act_open_req) :
1242 sizeof(struct cpl_t5_act_open_req),
1243 0, GFP_ATOMIC);
1244 if (!skb)
1245 goto rel_resource;
1246 skb->sk = (struct sock *)csk;
1247 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1248
1249 if (!csk->mtu)
1250 csk->mtu = dst_mtu(csk->dst);
1251 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1252 csk->tx_chan = cxgb4_port_chan(ndev);
1253
1254 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1255 step = lldi->ntxq / lldi->nchan;
1256 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1257 step = lldi->nrxq / lldi->nchan;
1258 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1259 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1260 csk->wr_una_cred = 0;
1261 cxgbi_sock_reset_wr_list(csk);
1262 csk->err = 0;
1263 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1264 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1265 csk, pi->port_id, ndev->name, csk->tx_chan,
1266 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1267 csk->smac_idx);
1268
1269 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1270 send_act_open_req(csk, skb, csk->l2t);
1271 neigh_release(n);
1272 return 0;
1273
1274rel_resource:
1275 if (n)
1276 neigh_release(n);
1277 if (skb)
1278 __kfree_skb(skb);
1279 return -EINVAL;
1280}
1281
1282#define CPL_ISCSI_DATA 0xB2
1283#define CPL_RX_ISCSI_DDP 0x49
1284cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1285 [CPL_ACT_ESTABLISH] = do_act_establish,
1286 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1287 [CPL_PEER_CLOSE] = do_peer_close,
1288 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1289 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1290 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1291 [CPL_FW4_ACK] = do_fw4_ack,
1292 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1293 [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1294 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1295 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1296 [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1297};
1298
1299int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1300{
1301 int rc;
1302
1303 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1304 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1305
1306 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1307 cxgb4i_max_connect);
1308 if (rc < 0)
1309 return rc;
1310
1311 cdev->csk_release_offload_resources = release_offload_resources;
1312 cdev->csk_push_tx_frames = push_tx_frames;
1313 cdev->csk_send_abort_req = send_abort_req;
1314 cdev->csk_send_close_req = send_close_req;
1315 cdev->csk_send_rx_credits = send_rx_credits;
1316 cdev->csk_alloc_cpls = alloc_cpls;
1317 cdev->csk_init_act_open = init_act_open;
1318
1319 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1320 return 0;
1321}
1322
1323
1324
1325
1326#define ULPMEM_IDATA_MAX_NPPODS 4
1327static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1328 struct ulp_mem_io *req,
1329 unsigned int wr_len, unsigned int dlen,
1330 unsigned int pm_addr)
1331{
1332 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1333
1334 INIT_ULPTX_WR(req, wr_len, 0, 0);
1335 if (is_t4(lldi->adapter_type))
1336 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1337 (ULP_MEMIO_ORDER(1)));
1338 else
1339 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1340 (V_T5_ULP_MEMIO_IMM(1)));
1341 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1342 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1343 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1344
1345 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1346 idata->len = htonl(dlen);
1347}
1348
1349static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1350 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1351 unsigned int npods,
1352 struct cxgbi_gather_list *gl,
1353 unsigned int gl_pidx)
1354{
1355 struct cxgbi_ddp_info *ddp = cdev->ddp;
1356 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1357 struct sk_buff *skb;
1358 struct ulp_mem_io *req;
1359 struct ulptx_idata *idata;
1360 struct cxgbi_pagepod *ppod;
1361 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1362 unsigned int dlen = PPOD_SIZE * npods;
1363 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1364 sizeof(struct ulptx_idata) + dlen, 16);
1365 unsigned int i;
1366
1367 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1368 if (!skb) {
1369 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1370 cdev, idx, npods);
1371 return -ENOMEM;
1372 }
1373 req = (struct ulp_mem_io *)skb->head;
1374 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1375
1376 ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
1377 idata = (struct ulptx_idata *)(req + 1);
1378 ppod = (struct cxgbi_pagepod *)(idata + 1);
1379
1380 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1381 if (!hdr && !gl)
1382 cxgbi_ddp_ppod_clear(ppod);
1383 else
1384 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1385 }
1386
1387 cxgb4_ofld_send(cdev->ports[port_id], skb);
1388 return 0;
1389}
1390
1391static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1392 unsigned int idx, unsigned int npods,
1393 struct cxgbi_gather_list *gl)
1394{
1395 unsigned int i, cnt;
1396 int err = 0;
1397
1398 for (i = 0; i < npods; i += cnt, idx += cnt) {
1399 cnt = npods - i;
1400 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1401 cnt = ULPMEM_IDATA_MAX_NPPODS;
1402 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1403 idx, cnt, gl, 4 * i);
1404 if (err < 0)
1405 break;
1406 }
1407 return err;
1408}
1409
1410static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1411 unsigned int idx, unsigned int npods)
1412{
1413 unsigned int i, cnt;
1414 int err;
1415
1416 for (i = 0; i < npods; i += cnt, idx += cnt) {
1417 cnt = npods - i;
1418 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1419 cnt = ULPMEM_IDATA_MAX_NPPODS;
1420 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1421 idx, cnt, NULL, 0);
1422 if (err < 0)
1423 break;
1424 }
1425}
1426
1427static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1428 int pg_idx, bool reply)
1429{
1430 struct sk_buff *skb;
1431 struct cpl_set_tcb_field *req;
1432
1433 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1434 return 0;
1435
1436 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1437 if (!skb)
1438 return -ENOMEM;
1439
1440
1441 req = (struct cpl_set_tcb_field *)skb->head;
1442 INIT_TP_WR(req, csk->tid);
1443 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1444 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1445 req->word_cookie = htons(0);
1446 req->mask = cpu_to_be64(0x3 << 8);
1447 req->val = cpu_to_be64(pg_idx << 8);
1448 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1449
1450 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1451 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1452
1453 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1454 return 0;
1455}
1456
1457static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1458 int hcrc, int dcrc, int reply)
1459{
1460 struct sk_buff *skb;
1461 struct cpl_set_tcb_field *req;
1462
1463 if (!hcrc && !dcrc)
1464 return 0;
1465
1466 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1467 if (!skb)
1468 return -ENOMEM;
1469
1470 csk->hcrc_len = (hcrc ? 4 : 0);
1471 csk->dcrc_len = (dcrc ? 4 : 0);
1472
1473 req = (struct cpl_set_tcb_field *)skb->head;
1474 INIT_TP_WR(req, tid);
1475 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1476 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1477 req->word_cookie = htons(0);
1478 req->mask = cpu_to_be64(0x3 << 4);
1479 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1480 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1481 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1482
1483 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1484 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1485
1486 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1487 return 0;
1488}
1489
1490static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1491{
1492 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1493 struct cxgbi_ddp_info *ddp = cdev->ddp;
1494 unsigned int tagmask, pgsz_factor[4];
1495 int err;
1496
1497 if (ddp) {
1498 kref_get(&ddp->refcnt);
1499 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1500 cdev, cdev->ddp);
1501 return -EALREADY;
1502 }
1503
1504 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1505 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1506 lldi->iscsi_iolen, lldi->iscsi_iolen);
1507 if (err < 0)
1508 return err;
1509
1510 ddp = cdev->ddp;
1511
1512 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1513 cxgbi_ddp_page_size_factor(pgsz_factor);
1514 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1515
1516 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1517 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1518 cdev->csk_ddp_set = ddp_set_map;
1519 cdev->csk_ddp_clear = ddp_clear_map;
1520
1521 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1522 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1523 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1524 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1525 " %u/%u.\n",
1526 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1527 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1528 ddp->max_rxsz, lldi->iscsi_iolen);
1529 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1530 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1531 ddp->max_rxsz);
1532 return 0;
1533}
1534
1535static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1536{
1537 struct cxgbi_device *cdev;
1538 struct port_info *pi;
1539 int i, rc;
1540
1541 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1542 if (!cdev) {
1543 pr_info("t4 device 0x%p, register failed.\n", lldi);
1544 return NULL;
1545 }
1546 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1547 cdev, lldi->adapter_type, lldi->nports,
1548 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1549 lldi->nrxq, lldi->wr_cred);
1550 for (i = 0; i < lldi->nrxq; i++)
1551 log_debug(1 << CXGBI_DBG_DEV,
1552 "t4 0x%p, rxq id #%d: %u.\n",
1553 cdev, i, lldi->rxq_ids[i]);
1554
1555 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1556 cdev->flags = CXGBI_FLAG_DEV_T4;
1557 cdev->pdev = lldi->pdev;
1558 cdev->ports = lldi->ports;
1559 cdev->nports = lldi->nports;
1560 cdev->mtus = lldi->mtus;
1561 cdev->nmtus = NMTUS;
1562 cdev->snd_win = cxgb4i_snd_win;
1563 cdev->rcv_win = cxgb4i_rcv_win;
1564 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1565 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1566 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1567 cdev->itp = &cxgb4i_iscsi_transport;
1568
1569 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1570 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1571 cdev, lldi->ports[0]->name, cdev->pfvf);
1572
1573 rc = cxgb4i_ddp_init(cdev);
1574 if (rc) {
1575 pr_info("t4 0x%p ddp init failed.\n", cdev);
1576 goto err_out;
1577 }
1578 rc = cxgb4i_ofld_init(cdev);
1579 if (rc) {
1580 pr_info("t4 0x%p ofld init failed.\n", cdev);
1581 goto err_out;
1582 }
1583
1584 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1585 &cxgb4i_host_template, cxgb4i_stt);
1586 if (rc)
1587 goto err_out;
1588
1589 for (i = 0; i < cdev->nports; i++) {
1590 pi = netdev_priv(lldi->ports[i]);
1591 cdev->hbas[i]->port_id = pi->port_id;
1592 }
1593 return cdev;
1594
1595err_out:
1596 cxgbi_device_unregister(cdev);
1597 return ERR_PTR(-ENOMEM);
1598}
1599
1600#define RX_PULL_LEN 128
1601static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1602 const struct pkt_gl *pgl)
1603{
1604 const struct cpl_act_establish *rpl;
1605 struct sk_buff *skb;
1606 unsigned int opc;
1607 struct cxgbi_device *cdev = handle;
1608
1609 if (pgl == NULL) {
1610 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1611
1612 skb = alloc_wr(len, 0, GFP_ATOMIC);
1613 if (!skb)
1614 goto nomem;
1615 skb_copy_to_linear_data(skb, &rsp[1], len);
1616 } else {
1617 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1618 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1619 pgl->va, be64_to_cpu(*rsp),
1620 be64_to_cpu(*(u64 *)pgl->va),
1621 pgl->tot_len);
1622 return 0;
1623 }
1624 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1625 if (unlikely(!skb))
1626 goto nomem;
1627 }
1628
1629 rpl = (struct cpl_act_establish *)skb->data;
1630 opc = rpl->ot.opcode;
1631 log_debug(1 << CXGBI_DBG_TOE,
1632 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1633 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1634 if (cxgb4i_cplhandlers[opc])
1635 cxgb4i_cplhandlers[opc](cdev, skb);
1636 else {
1637 pr_err("No handler for opcode 0x%x.\n", opc);
1638 __kfree_skb(skb);
1639 }
1640 return 0;
1641nomem:
1642 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1643 return 1;
1644}
1645
1646static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1647{
1648 struct cxgbi_device *cdev = handle;
1649
1650 switch (state) {
1651 case CXGB4_STATE_UP:
1652 pr_info("cdev 0x%p, UP.\n", cdev);
1653
1654 break;
1655 case CXGB4_STATE_START_RECOVERY:
1656 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1657
1658 break;
1659 case CXGB4_STATE_DOWN:
1660 pr_info("cdev 0x%p, DOWN.\n", cdev);
1661 break;
1662 case CXGB4_STATE_DETACH:
1663 pr_info("cdev 0x%p, DETACH.\n", cdev);
1664 cxgbi_device_unregister(cdev);
1665 break;
1666 default:
1667 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1668 break;
1669 }
1670 return 0;
1671}
1672
1673static int __init cxgb4i_init_module(void)
1674{
1675 int rc;
1676
1677 printk(KERN_INFO "%s", version);
1678
1679 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1680 if (rc < 0)
1681 return rc;
1682 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1683 return 0;
1684}
1685
1686static void __exit cxgb4i_exit_module(void)
1687{
1688 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1689 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1690 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1691}
1692
1693module_init(cxgb4i_init_module);
1694module_exit(cxgb4i_exit_module);
1695
