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[SCSI] qla2xxx: Avoid depending on SCSI host_lock in queuecommand function.
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / cxgbi / cxgb4i / cxgb4i.c
CommitLineData
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 |
109 CAP_PADDING_OFFLOAD,
110 .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH |
111 ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN |
112 ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T |
113 ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST |
114 ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN |
115 ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL |
116 ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
117 ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT |
118 ISCSI_PERSISTENT_ADDRESS |
119 ISCSI_TARGET_NAME | ISCSI_TPGT |
120 ISCSI_USERNAME | ISCSI_PASSWORD |
121 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
122 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
123 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
124 ISCSI_PING_TMO | ISCSI_RECV_TMO |
125 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
126 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
127 ISCSI_HOST_INITIATOR_NAME |
128 ISCSI_HOST_NETDEV_NAME,
129 .get_host_param = cxgbi_get_host_param,
130 .set_host_param = cxgbi_set_host_param,
131 /* session management */
132 .create_session = cxgbi_create_session,
133 .destroy_session = cxgbi_destroy_session,
134 .get_session_param = iscsi_session_get_param,
135 /* connection management */
136 .create_conn = cxgbi_create_conn,
137 .bind_conn = cxgbi_bind_conn,
138 .destroy_conn = iscsi_tcp_conn_teardown,
139 .start_conn = iscsi_conn_start,
140 .stop_conn = iscsi_conn_stop,
141 .get_conn_param = cxgbi_get_conn_param,
142 .set_param = cxgbi_set_conn_param,
143 .get_stats = cxgbi_get_conn_stats,
144 /* pdu xmit req from user space */
145 .send_pdu = iscsi_conn_send_pdu,
146 /* task */
147 .init_task = iscsi_tcp_task_init,
148 .xmit_task = iscsi_tcp_task_xmit,
149 .cleanup_task = cxgbi_cleanup_task,
150 /* pdu */
151 .alloc_pdu = cxgbi_conn_alloc_pdu,
152 .init_pdu = cxgbi_conn_init_pdu,
153 .xmit_pdu = cxgbi_conn_xmit_pdu,
154 .parse_pdu_itt = cxgbi_parse_pdu_itt,
155 /* TCP connect/disconnect */
156 .ep_connect = cxgbi_ep_connect,
157 .ep_poll = cxgbi_ep_poll,
158 .ep_disconnect = cxgbi_ep_disconnect,
159 /* Error recovery timeout call */
160 .session_recovery_timedout = iscsi_session_recovery_timedout,
161};
162
163static struct scsi_transport_template *cxgb4i_stt;
164
165/*
166 * CPL (Chelsio Protocol Language) defines a message passing interface between
167 * the host driver and Chelsio asic.
168 * The section below implments CPLs that related to iscsi tcp connection
169 * open/close/abort and data send/receive.
170 */
171#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
172#define RCV_BUFSIZ_MASK 0x3FFU
173#define MAX_IMM_TX_PKT_LEN 128
174
175static inline void set_queue(struct sk_buff *skb, unsigned int queue,
176 const struct cxgbi_sock *csk)
177{
178 skb->queue_mapping = queue;
179}
180
181static int push_tx_frames(struct cxgbi_sock *, int);
182
183/*
184 * is_ofld_imm - check whether a packet can be sent as immediate data
185 * @skb: the packet
186 *
187 * Returns true if a packet can be sent as an offload WR with immediate
188 * data. We currently use the same limit as for Ethernet packets.
189 */
190static inline int is_ofld_imm(const struct sk_buff *skb)
191{
192 return skb->len <= (MAX_IMM_TX_PKT_LEN -
193 sizeof(struct fw_ofld_tx_data_wr));
194}
195
196static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
197 struct l2t_entry *e)
198{
199 struct cpl_act_open_req *req;
200 int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
201 unsigned long long opt0;
202 unsigned int opt2;
203 unsigned int qid_atid = ((unsigned int)csk->atid) |
204 (((unsigned int)csk->rss_qid) << 14);
205
206 opt0 = KEEP_ALIVE(1) |
207 WND_SCALE(wscale) |
208 MSS_IDX(csk->mss_idx) |
209 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
210 TX_CHAN(csk->tx_chan) |
211 SMAC_SEL(csk->smac_idx) |
212 ULP_MODE(ULP_MODE_ISCSI) |
213 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
214 opt2 = RX_CHANNEL(0) |
215 RSS_QUEUE_VALID |
216 (1 << 20) | (1 << 22) |
217 RSS_QUEUE(csk->rss_qid);
218
219 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
220 req = (struct cpl_act_open_req *)skb->head;
221
222 INIT_TP_WR(req, 0);
223 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
224 qid_atid));
225 req->local_port = csk->saddr.sin_port;
226 req->peer_port = csk->daddr.sin_port;
227 req->local_ip = csk->saddr.sin_addr.s_addr;
228 req->peer_ip = csk->daddr.sin_addr.s_addr;
229 req->opt0 = cpu_to_be64(opt0);
230 req->params = 0;
231 req->opt2 = cpu_to_be32(opt2);
232
233 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
234 "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
235 csk, &req->local_ip, ntohs(req->local_port),
236 &req->peer_ip, ntohs(req->peer_port),
237 csk->atid, csk->rss_qid);
238
239 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
240}
241
242static void send_close_req(struct cxgbi_sock *csk)
243{
244 struct sk_buff *skb = csk->cpl_close;
245 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
246 unsigned int tid = csk->tid;
247
248 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
249 "csk 0x%p,%u,0x%lx, tid %u.\n",
250 csk, csk->state, csk->flags, csk->tid);
251 csk->cpl_close = NULL;
252 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
253 INIT_TP_WR(req, tid);
254 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
255 req->rsvd = 0;
256
257 cxgbi_sock_skb_entail(csk, skb);
258 if (csk->state >= CTP_ESTABLISHED)
259 push_tx_frames(csk, 1);
260}
261
262static void abort_arp_failure(void *handle, struct sk_buff *skb)
263{
264 struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
265 struct cpl_abort_req *req;
266
267 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
268 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
269 csk, csk->state, csk->flags, csk->tid);
270 req = (struct cpl_abort_req *)skb->data;
271 req->cmd = CPL_ABORT_NO_RST;
272 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
273}
274
275static void send_abort_req(struct cxgbi_sock *csk)
276{
277 struct cpl_abort_req *req;
278 struct sk_buff *skb = csk->cpl_abort_req;
279
280 if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
281 return;
282 cxgbi_sock_set_state(csk, CTP_ABORTING);
283 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
284 cxgbi_sock_purge_write_queue(csk);
285
286 csk->cpl_abort_req = NULL;
287 req = (struct cpl_abort_req *)skb->head;
288 set_queue(skb, CPL_PRIORITY_DATA, csk);
289 req->cmd = CPL_ABORT_SEND_RST;
290 t4_set_arp_err_handler(skb, csk, abort_arp_failure);
291 INIT_TP_WR(req, csk->tid);
292 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
293 req->rsvd0 = htonl(csk->snd_nxt);
294 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
295
296 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
297 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
298 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
299 req->rsvd1);
300
301 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
302}
303
304static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
305{
306 struct sk_buff *skb = csk->cpl_abort_rpl;
307 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
308
309 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
310 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
311 csk, csk->state, csk->flags, csk->tid, rst_status);
312
313 csk->cpl_abort_rpl = NULL;
314 set_queue(skb, CPL_PRIORITY_DATA, csk);
315 INIT_TP_WR(rpl, csk->tid);
316 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
317 rpl->cmd = rst_status;
318 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
319}
320
321/*
322 * CPL connection rx data ack: host ->
323 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
324 * credits sent.
325 */
326static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
327{
328 struct sk_buff *skb;
329 struct cpl_rx_data_ack *req;
330
331 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
332 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
333 csk, csk->state, csk->flags, csk->tid, credits);
334
24d3f95a 335 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
7b36b6e0 336 if (!skb) {
337 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
338 return 0;
339 }
340 req = (struct cpl_rx_data_ack *)skb->head;
341
342 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
343 INIT_TP_WR(req, csk->tid);
344 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
345 csk->tid));
346 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
347 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
348 return credits;
349}
350
351/*
352 * sgl_len - calculates the size of an SGL of the given capacity
353 * @n: the number of SGL entries
354 * Calculates the number of flits needed for a scatter/gather list that
355 * can hold the given number of entries.
356 */
357static inline unsigned int sgl_len(unsigned int n)
358{
359 n--;
360 return (3 * n) / 2 + (n & 1) + 2;
361}
362
363/*
364 * calc_tx_flits_ofld - calculate # of flits for an offload packet
365 * @skb: the packet
366 *
367 * Returns the number of flits needed for the given offload packet.
368 * These packets are already fully constructed and no additional headers
369 * will be added.
370 */
371static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
372{
373 unsigned int flits, cnt;
374
375 if (is_ofld_imm(skb))
376 return DIV_ROUND_UP(skb->len, 8);
377 flits = skb_transport_offset(skb) / 8;
378 cnt = skb_shinfo(skb)->nr_frags;
379 if (skb->tail != skb->transport_header)
380 cnt++;
381 return flits + sgl_len(cnt);
382}
383
384static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
385{
386 struct sk_buff *skb;
387 struct fw_flowc_wr *flowc;
388 int flowclen, i;
389
390 flowclen = 80;
24d3f95a 391 skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
7b36b6e0 392 flowc = (struct fw_flowc_wr *)skb->head;
393 flowc->op_to_nparams =
394 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
395 flowc->flowid_len16 =
396 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
397 FW_WR_FLOWID(csk->tid));
398 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
e27d6169 399 flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
7b36b6e0 400 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
401 flowc->mnemval[1].val = htonl(csk->tx_chan);
402 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
403 flowc->mnemval[2].val = htonl(csk->tx_chan);
404 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
405 flowc->mnemval[3].val = htonl(csk->rss_qid);
406 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
407 flowc->mnemval[4].val = htonl(csk->snd_nxt);
408 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
409 flowc->mnemval[5].val = htonl(csk->rcv_nxt);
410 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
411 flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
412 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
413 flowc->mnemval[7].val = htonl(csk->advmss);
414 flowc->mnemval[8].mnemonic = 0;
415 flowc->mnemval[8].val = 0;
416 for (i = 0; i < 9; i++) {
417 flowc->mnemval[i].r4[0] = 0;
418 flowc->mnemval[i].r4[1] = 0;
419 flowc->mnemval[i].r4[2] = 0;
420 }
421 set_queue(skb, CPL_PRIORITY_DATA, csk);
422
423 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
424 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
425 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
426 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
427 csk->advmss);
428
429 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
430}
431
432static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
433 int dlen, int len, u32 credits, int compl)
434{
435 struct fw_ofld_tx_data_wr *req;
436 unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
437 unsigned int wr_ulp_mode = 0;
438
439 req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
440
441 if (is_ofld_imm(skb)) {
442 req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
443 FW_WR_COMPL(1) |
444 FW_WR_IMMDLEN(dlen));
445 req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
446 FW_WR_LEN16(credits));
447 } else {
448 req->op_to_immdlen =
449 cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
450 FW_WR_COMPL(1) |
451 FW_WR_IMMDLEN(0));
452 req->flowid_len16 =
453 cpu_to_be32(FW_WR_FLOWID(csk->tid) |
454 FW_WR_LEN16(credits));
455 }
456 if (submode)
457 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
458 FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
459 req->tunnel_to_proxy = htonl(wr_ulp_mode) |
460 FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1);
461 req->plen = htonl(len);
462 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
463 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
464}
465
466static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
467{
468 kfree_skb(skb);
469}
470
471static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
472{
473 int total_size = 0;
474 struct sk_buff *skb;
475
476 if (unlikely(csk->state < CTP_ESTABLISHED ||
477 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
478 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
479 1 << CXGBI_DBG_PDU_TX,
480 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
481 csk, csk->state, csk->flags, csk->tid);
482 return 0;
483 }
484
485 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
486 int dlen = skb->len;
487 int len = skb->len;
488 unsigned int credits_needed;
489
490 skb_reset_transport_header(skb);
491 if (is_ofld_imm(skb))
492 credits_needed = DIV_ROUND_UP(dlen +
493 sizeof(struct fw_ofld_tx_data_wr), 16);
494 else
495 credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
496 + sizeof(struct fw_ofld_tx_data_wr),
497 16);
498
499 if (csk->wr_cred < credits_needed) {
500 log_debug(1 << CXGBI_DBG_PDU_TX,
501 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
502 csk, skb->len, skb->data_len,
503 credits_needed, csk->wr_cred);
504 break;
505 }
506 __skb_unlink(skb, &csk->write_queue);
507 set_queue(skb, CPL_PRIORITY_DATA, csk);
508 skb->csum = credits_needed;
509 csk->wr_cred -= credits_needed;
510 csk->wr_una_cred += credits_needed;
511 cxgbi_sock_enqueue_wr(csk, skb);
512
513 log_debug(1 << CXGBI_DBG_PDU_TX,
514 "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
515 csk, skb->len, skb->data_len, credits_needed,
516 csk->wr_cred, csk->wr_una_cred);
517
518 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
519 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
520 send_tx_flowc_wr(csk);
521 skb->csum += 5;
522 csk->wr_cred -= 5;
523 csk->wr_una_cred += 5;
524 }
525 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
526 make_tx_data_wr(csk, skb, dlen, len, credits_needed,
527 req_completion);
528 csk->snd_nxt += len;
529 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
530 }
531 total_size += skb->truesize;
532 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
533
534 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
535 "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
536 csk, csk->state, csk->flags, csk->tid, skb, len);
537
538 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
539 }
540 return total_size;
541}
542
543static inline void free_atid(struct cxgbi_sock *csk)
544{
545 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
546
547 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
548 cxgb4_free_atid(lldi->tids, csk->atid);
549 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
550 cxgbi_sock_put(csk);
551 }
552}
553
554static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
555{
556 struct cxgbi_sock *csk;
557 struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
558 unsigned short tcp_opt = ntohs(req->tcp_opt);
559 unsigned int tid = GET_TID(req);
560 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
561 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
562 struct tid_info *t = lldi->tids;
563 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
564
565 csk = lookup_atid(t, atid);
566 if (unlikely(!csk)) {
567 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
568 goto rel_skb;
569 }
570
e27d6169 571 if (csk->atid != atid) {
572 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
573 atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
574 goto rel_skb;
575 }
576
7b36b6e0 577 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
578 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
579 csk, csk->state, csk->flags, tid, atid, rcv_isn);
580
581 cxgbi_sock_get(csk);
582 csk->tid = tid;
583 cxgb4_insert_tid(lldi->tids, csk, tid);
584 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
585
586 free_atid(csk);
587
588 spin_lock_bh(&csk->lock);
589 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
590 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
591 csk, csk->state, csk->flags, csk->tid);
592
593 if (csk->retry_timer.function) {
594 del_timer(&csk->retry_timer);
595 csk->retry_timer.function = NULL;
596 }
597
598 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
599 /*
600 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
601 * pass through opt0.
602 */
603 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
604 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
605
606 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
607 if (GET_TCPOPT_TSTAMP(tcp_opt))
608 csk->advmss -= 12;
609 if (csk->advmss < 128)
610 csk->advmss = 128;
611
612 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
613 "csk 0x%p, mss_idx %u, advmss %u.\n",
614 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
615
616 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
617
618 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
619 send_abort_req(csk);
620 else {
621 if (skb_queue_len(&csk->write_queue))
622 push_tx_frames(csk, 0);
623 cxgbi_conn_tx_open(csk);
624 }
625 spin_unlock_bh(&csk->lock);
626
627rel_skb:
628 __kfree_skb(skb);
629}
630
631static int act_open_rpl_status_to_errno(int status)
632{
633 switch (status) {
634 case CPL_ERR_CONN_RESET:
635 return -ECONNREFUSED;
636 case CPL_ERR_ARP_MISS:
637 return -EHOSTUNREACH;
638 case CPL_ERR_CONN_TIMEDOUT:
639 return -ETIMEDOUT;
640 case CPL_ERR_TCAM_FULL:
641 return -ENOMEM;
642 case CPL_ERR_CONN_EXIST:
643 return -EADDRINUSE;
644 default:
645 return -EIO;
646 }
647}
648
649static void csk_act_open_retry_timer(unsigned long data)
650{
651 struct sk_buff *skb;
652 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
653
654 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
655 "csk 0x%p,%u,0x%lx,%u.\n",
656 csk, csk->state, csk->flags, csk->tid);
657
658 cxgbi_sock_get(csk);
659 spin_lock_bh(&csk->lock);
24d3f95a 660 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
7b36b6e0 661 if (!skb)
662 cxgbi_sock_fail_act_open(csk, -ENOMEM);
663 else {
664 skb->sk = (struct sock *)csk;
665 t4_set_arp_err_handler(skb, csk,
666 cxgbi_sock_act_open_req_arp_failure);
667 send_act_open_req(csk, skb, csk->l2t);
668 }
669 spin_unlock_bh(&csk->lock);
670 cxgbi_sock_put(csk);
671}
672
673static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
674{
675 struct cxgbi_sock *csk;
676 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
677 unsigned int tid = GET_TID(rpl);
678 unsigned int atid =
679 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
680 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
681 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
682 struct tid_info *t = lldi->tids;
683
684 csk = lookup_atid(t, atid);
685 if (unlikely(!csk)) {
686 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
687 goto rel_skb;
688 }
689
e27d6169 690 pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
691 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
692 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
693 atid, tid, status, csk, csk->state, csk->flags);
7b36b6e0 694
695 if (status && status != CPL_ERR_TCAM_FULL &&
696 status != CPL_ERR_CONN_EXIST &&
697 status != CPL_ERR_ARP_MISS)
698 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
699
700 cxgbi_sock_get(csk);
701 spin_lock_bh(&csk->lock);
702
703 if (status == CPL_ERR_CONN_EXIST &&
704 csk->retry_timer.function != csk_act_open_retry_timer) {
705 csk->retry_timer.function = csk_act_open_retry_timer;
706 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
707 } else
708 cxgbi_sock_fail_act_open(csk,
709 act_open_rpl_status_to_errno(status));
710
711 spin_unlock_bh(&csk->lock);
712 cxgbi_sock_put(csk);
713rel_skb:
714 __kfree_skb(skb);
715}
716
717static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
718{
719 struct cxgbi_sock *csk;
720 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
721 unsigned int tid = GET_TID(req);
722 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
723 struct tid_info *t = lldi->tids;
724
725 csk = lookup_tid(t, tid);
726 if (unlikely(!csk)) {
727 pr_err("can't find connection for tid %u.\n", tid);
728 goto rel_skb;
729 }
730 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
731 "csk 0x%p,%u,0x%lx,%u.\n",
732 csk, csk->state, csk->flags, csk->tid);
733 cxgbi_sock_rcv_peer_close(csk);
734rel_skb:
735 __kfree_skb(skb);
736}
737
738static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
739{
740 struct cxgbi_sock *csk;
741 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
742 unsigned int tid = GET_TID(rpl);
743 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
744 struct tid_info *t = lldi->tids;
745
746 csk = lookup_tid(t, tid);
747 if (unlikely(!csk)) {
748 pr_err("can't find connection for tid %u.\n", tid);
749 goto rel_skb;
750 }
751 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
752 "csk 0x%p,%u,0x%lx,%u.\n",
753 csk, csk->state, csk->flags, csk->tid);
754 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
755rel_skb:
756 __kfree_skb(skb);
757}
758
759static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
760 int *need_rst)
761{
762 switch (abort_reason) {
763 case CPL_ERR_BAD_SYN: /* fall through */
764 case CPL_ERR_CONN_RESET:
765 return csk->state > CTP_ESTABLISHED ?
766 -EPIPE : -ECONNRESET;
767 case CPL_ERR_XMIT_TIMEDOUT:
768 case CPL_ERR_PERSIST_TIMEDOUT:
769 case CPL_ERR_FINWAIT2_TIMEDOUT:
770 case CPL_ERR_KEEPALIVE_TIMEDOUT:
771 return -ETIMEDOUT;
772 default:
773 return -EIO;
774 }
775}
776
777static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
778{
779 struct cxgbi_sock *csk;
780 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
781 unsigned int tid = GET_TID(req);
782 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
783 struct tid_info *t = lldi->tids;
784 int rst_status = CPL_ABORT_NO_RST;
785
786 csk = lookup_tid(t, tid);
787 if (unlikely(!csk)) {
788 pr_err("can't find connection for tid %u.\n", tid);
789 goto rel_skb;
790 }
791
792 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
793 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
794 csk, csk->state, csk->flags, csk->tid, req->status);
795
796 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
797 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
798 goto rel_skb;
799
800 cxgbi_sock_get(csk);
801 spin_lock_bh(&csk->lock);
802
803 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
804 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
805 cxgbi_sock_set_state(csk, CTP_ABORTING);
806 goto done;
807 }
808
809 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
810 send_abort_rpl(csk, rst_status);
811
812 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
813 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
814 cxgbi_sock_closed(csk);
815 }
816done:
817 spin_unlock_bh(&csk->lock);
818 cxgbi_sock_put(csk);
819rel_skb:
820 __kfree_skb(skb);
821}
822
823static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
824{
825 struct cxgbi_sock *csk;
826 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
827 unsigned int tid = GET_TID(rpl);
828 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
829 struct tid_info *t = lldi->tids;
830
831 csk = lookup_tid(t, tid);
832 if (!csk)
833 goto rel_skb;
834
835 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
836 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
837 rpl->status, csk, csk ? csk->state : 0,
838 csk ? csk->flags : 0UL);
839
840 if (rpl->status == CPL_ERR_ABORT_FAILED)
841 goto rel_skb;
842
843 cxgbi_sock_rcv_abort_rpl(csk);
844rel_skb:
845 __kfree_skb(skb);
846}
847
848static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
849{
850 struct cxgbi_sock *csk;
851 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
852 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
853 unsigned int tid = GET_TID(cpl);
854 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
855 struct tid_info *t = lldi->tids;
7b36b6e0 856
857 csk = lookup_tid(t, tid);
858 if (unlikely(!csk)) {
859 pr_err("can't find conn. for tid %u.\n", tid);
860 goto rel_skb;
861 }
862
863 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
864 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
865 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
866 pdu_len_ddp);
867
868 spin_lock_bh(&csk->lock);
869
870 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
871 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
872 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
873 csk, csk->state, csk->flags, csk->tid);
874 if (csk->state != CTP_ABORTING)
875 goto abort_conn;
876 else
877 goto discard;
878 }
879
880 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
e27d6169 881 cxgbi_skcb_flags(skb) = 0;
882
7b36b6e0 883 skb_reset_transport_header(skb);
884 __skb_pull(skb, sizeof(*cpl));
885 __pskb_trim(skb, ntohs(cpl->len));
886
887 if (!csk->skb_ulp_lhdr) {
888 unsigned char *bhs;
889 unsigned int hlen, dlen;
890
891 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
892 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
893 csk, csk->state, csk->flags, csk->tid, skb);
894 csk->skb_ulp_lhdr = skb;
e27d6169 895 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
7b36b6e0 896
e27d6169 897 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
7b36b6e0 898 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
e27d6169 899 csk->tid, cxgbi_skcb_tcp_seq(skb),
7b36b6e0 900 csk->rcv_nxt);
901 goto abort_conn;
902 }
903
e27d6169 904 bhs = skb->data;
7b36b6e0 905 hlen = ntohs(cpl->len);
906 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
907
908 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
909 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
910 "mismatch %u != %u + %u, seq 0x%x.\n",
911 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40,
912 hlen, dlen, cxgbi_skcb_tcp_seq(skb));
913 goto abort_conn;
914 }
915
916 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
917 if (dlen)
918 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
919 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
920
921 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
922 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
923 csk, skb, *bhs, hlen, dlen,
924 ntohl(*((unsigned int *)(bhs + 16))),
925 ntohl(*((unsigned int *)(bhs + 24))));
926
927 } else {
e27d6169 928 struct sk_buff *lskb = csk->skb_ulp_lhdr;
7b36b6e0 929
e27d6169 930 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
7b36b6e0 931 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
932 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
933 csk, csk->state, csk->flags, skb, lskb);
934 }
935
936 __skb_queue_tail(&csk->receive_queue, skb);
937 spin_unlock_bh(&csk->lock);
938 return;
939
940abort_conn:
941 send_abort_req(csk);
942discard:
943 spin_unlock_bh(&csk->lock);
944rel_skb:
945 __kfree_skb(skb);
946}
947
948static void do_rx_data_ddp(struct cxgbi_device *cdev,
949 struct sk_buff *skb)
950{
951 struct cxgbi_sock *csk;
952 struct sk_buff *lskb;
953 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
954 unsigned int tid = GET_TID(rpl);
955 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
956 struct tid_info *t = lldi->tids;
957 unsigned int status = ntohl(rpl->ddpvld);
958
959 csk = lookup_tid(t, tid);
960 if (unlikely(!csk)) {
961 pr_err("can't find connection for tid %u.\n", tid);
962 goto rel_skb;
963 }
964
965 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
966 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
967 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
968
969 spin_lock_bh(&csk->lock);
970
971 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
972 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
973 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
974 csk, csk->state, csk->flags, csk->tid);
975 if (csk->state != CTP_ABORTING)
976 goto abort_conn;
977 else
978 goto discard;
979 }
980
981 if (!csk->skb_ulp_lhdr) {
982 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
983 goto abort_conn;
984 }
985
986 lskb = csk->skb_ulp_lhdr;
987 csk->skb_ulp_lhdr = NULL;
988
7b36b6e0 989 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
990
991 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
992 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
993 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
994
995 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
e27d6169 996 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
997 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 998 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
999 }
1000 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
e27d6169 1001 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1002 csk, lskb, status, cxgbi_skcb_flags(lskb));
7b36b6e0 1003 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1004 }
1005 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1006 log_debug(1 << CXGBI_DBG_PDU_RX,
1007 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1008 csk, lskb, status);
1009 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1010 }
1011 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1012 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1013 log_debug(1 << CXGBI_DBG_PDU_RX,
1014 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1015 csk, lskb, status);
1016 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1017 }
1018 log_debug(1 << CXGBI_DBG_PDU_RX,
1019 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1020 csk, lskb, cxgbi_skcb_flags(lskb));
1021
e27d6169 1022 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
7b36b6e0 1023 cxgbi_conn_pdu_ready(csk);
1024 spin_unlock_bh(&csk->lock);
1025 goto rel_skb;
1026
1027abort_conn:
1028 send_abort_req(csk);
1029discard:
1030 spin_unlock_bh(&csk->lock);
1031rel_skb:
1032 __kfree_skb(skb);
1033}
1034
1035static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1036{
1037 struct cxgbi_sock *csk;
1038 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1039 unsigned int tid = GET_TID(rpl);
1040 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1041 struct tid_info *t = lldi->tids;
1042
1043 csk = lookup_tid(t, tid);
1044 if (unlikely(!csk))
1045 pr_err("can't find connection for tid %u.\n", tid);
1046 else {
1047 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1048 "csk 0x%p,%u,0x%lx,%u.\n",
1049 csk, csk->state, csk->flags, csk->tid);
1050 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1051 rpl->seq_vld);
1052 }
1053 __kfree_skb(skb);
1054}
1055
1056static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1057{
1058 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1059 unsigned int tid = GET_TID(rpl);
1060 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1061 struct tid_info *t = lldi->tids;
1062 struct cxgbi_sock *csk;
1063
1064 csk = lookup_tid(t, tid);
1065 if (!csk)
1066 pr_err("can't find conn. for tid %u.\n", tid);
1067
1068 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1069 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1070 csk, csk->state, csk->flags, csk->tid, rpl->status);
1071
1072 if (rpl->status != CPL_ERR_NONE)
1073 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1074 csk, tid, rpl->status);
1075
1076 __kfree_skb(skb);
1077}
1078
1079static int alloc_cpls(struct cxgbi_sock *csk)
1080{
24d3f95a 1081 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1082 0, GFP_KERNEL);
7b36b6e0 1083 if (!csk->cpl_close)
1084 return -ENOMEM;
1085
24d3f95a 1086 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1087 0, GFP_KERNEL);
7b36b6e0 1088 if (!csk->cpl_abort_req)
1089 goto free_cpls;
1090
24d3f95a 1091 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1092 0, GFP_KERNEL);
7b36b6e0 1093 if (!csk->cpl_abort_rpl)
1094 goto free_cpls;
1095 return 0;
1096
1097free_cpls:
1098 cxgbi_sock_free_cpl_skbs(csk);
1099 return -ENOMEM;
1100}
1101
1102static inline void l2t_put(struct cxgbi_sock *csk)
1103{
1104 if (csk->l2t) {
1105 cxgb4_l2t_release(csk->l2t);
1106 csk->l2t = NULL;
1107 cxgbi_sock_put(csk);
1108 }
1109}
1110
1111static void release_offload_resources(struct cxgbi_sock *csk)
1112{
1113 struct cxgb4_lld_info *lldi;
1114
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
1119 cxgbi_sock_free_cpl_skbs(csk);
1120 if (csk->wr_cred != csk->wr_max_cred) {
1121 cxgbi_sock_purge_wr_queue(csk);
1122 cxgbi_sock_reset_wr_list(csk);
1123 }
1124
1125 l2t_put(csk);
1126 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1127 free_atid(csk);
1128 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1129 lldi = cxgbi_cdev_priv(csk->cdev);
1130 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1131 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1132 cxgbi_sock_put(csk);
1133 }
1134 csk->dst = NULL;
1135 csk->cdev = NULL;
1136}
1137
1138static int init_act_open(struct cxgbi_sock *csk)
1139{
1140 struct cxgbi_device *cdev = csk->cdev;
1141 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1142 struct net_device *ndev = cdev->ports[csk->port_id];
1143 struct port_info *pi = netdev_priv(ndev);
1144 struct sk_buff *skb = NULL;
1145 unsigned int step;
1146
1147 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1148 "csk 0x%p,%u,0x%lx,%u.\n",
1149 csk, csk->state, csk->flags, csk->tid);
1150
1151 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1152 if (csk->atid < 0) {
1153 pr_err("%s, NO atid available.\n", ndev->name);
1154 return -EINVAL;
1155 }
1156 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1157 cxgbi_sock_get(csk);
1158
1159 csk->l2t = cxgb4_l2t_get(lldi->l2t, csk->dst->neighbour, ndev, 0);
1160 if (!csk->l2t) {
1161 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1162 goto rel_resource;
1163 }
1164 cxgbi_sock_get(csk);
1165
24d3f95a 1166 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
7b36b6e0 1167 if (!skb)
1168 goto rel_resource;
1169 skb->sk = (struct sock *)csk;
1170 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1171
1172 if (!csk->mtu)
1173 csk->mtu = dst_mtu(csk->dst);
1174 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1175 csk->tx_chan = cxgb4_port_chan(ndev);
1176 /* SMT two entries per row */
1177 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1178 step = lldi->ntxq / lldi->nchan;
1179 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1180 step = lldi->nrxq / lldi->nchan;
1181 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1182 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1183 csk->wr_una_cred = 0;
1184 cxgbi_sock_reset_wr_list(csk);
1185 csk->err = 0;
1186 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1187 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1188 csk, pi->port_id, ndev->name, csk->tx_chan,
1189 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1190 csk->smac_idx);
1191
1192 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1193 send_act_open_req(csk, skb, csk->l2t);
1194 return 0;
1195
1196rel_resource:
1197 if (skb)
1198 __kfree_skb(skb);
1199 return -EINVAL;
1200}
1201
1202cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1203 [CPL_ACT_ESTABLISH] = do_act_establish,
1204 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1205 [CPL_PEER_CLOSE] = do_peer_close,
1206 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1207 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1208 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1209 [CPL_FW4_ACK] = do_fw4_ack,
1210 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1211 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1212 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1213};
1214
1215int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1216{
1217 int rc;
1218
1219 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1220 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1221
1222 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1223 cxgb4i_max_connect);
1224 if (rc < 0)
1225 return rc;
1226
1227 cdev->csk_release_offload_resources = release_offload_resources;
1228 cdev->csk_push_tx_frames = push_tx_frames;
1229 cdev->csk_send_abort_req = send_abort_req;
1230 cdev->csk_send_close_req = send_close_req;
1231 cdev->csk_send_rx_credits = send_rx_credits;
1232 cdev->csk_alloc_cpls = alloc_cpls;
1233 cdev->csk_init_act_open = init_act_open;
1234
1235 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1236 return 0;
1237}
1238
1239/*
1240 * functions to program the pagepod in h/w
1241 */
e27d6169 1242#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
7b36b6e0 1243static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
e27d6169 1244 unsigned int wr_len, unsigned int dlen,
1245 unsigned int pm_addr)
7b36b6e0 1246{
e27d6169 1247 struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
7b36b6e0 1248
1249 INIT_ULPTX_WR(req, wr_len, 0, 0);
e27d6169 1250 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23));
7b36b6e0 1251 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1252 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1253 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
e27d6169 1254
1255 idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1256 idata->len = htonl(dlen);
7b36b6e0 1257}
1258
e27d6169 1259static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
7b36b6e0 1260 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1261 unsigned int npods,
1262 struct cxgbi_gather_list *gl,
1263 unsigned int gl_pidx)
1264{
1265 struct cxgbi_ddp_info *ddp = cdev->ddp;
7b36b6e0 1266 struct sk_buff *skb;
1267 struct ulp_mem_io *req;
e27d6169 1268 struct ulptx_idata *idata;
7b36b6e0 1269 struct cxgbi_pagepod *ppod;
e27d6169 1270 unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1271 unsigned int dlen = PPOD_SIZE * npods;
1272 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1273 sizeof(struct ulptx_idata) + dlen, 16);
7b36b6e0 1274 unsigned int i;
1275
e27d6169 1276 skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
7b36b6e0 1277 if (!skb) {
1278 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1279 cdev, idx, npods);
1280 return -ENOMEM;
1281 }
1282 req = (struct ulp_mem_io *)skb->head;
1283 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1284
e27d6169 1285 ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr);
1286 idata = (struct ulptx_idata *)(req + 1);
1287 ppod = (struct cxgbi_pagepod *)(idata + 1);
7b36b6e0 1288
1289 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1290 if (!hdr && !gl)
1291 cxgbi_ddp_ppod_clear(ppod);
1292 else
1293 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1294 }
1295
1296 cxgb4_ofld_send(cdev->ports[port_id], skb);
1297 return 0;
1298}
1299
1300static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1301 unsigned int idx, unsigned int npods,
1302 struct cxgbi_gather_list *gl)
1303{
1304 unsigned int i, cnt;
1305 int err = 0;
1306
1307 for (i = 0; i < npods; i += cnt, idx += cnt) {
1308 cnt = npods - i;
e27d6169 1309 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1310 cnt = ULPMEM_IDATA_MAX_NPPODS;
1311 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
7b36b6e0 1312 idx, cnt, gl, 4 * i);
1313 if (err < 0)
1314 break;
1315 }
1316 return err;
1317}
1318
1319static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1320 unsigned int idx, unsigned int npods)
1321{
1322 unsigned int i, cnt;
1323 int err;
1324
1325 for (i = 0; i < npods; i += cnt, idx += cnt) {
1326 cnt = npods - i;
e27d6169 1327 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1328 cnt = ULPMEM_IDATA_MAX_NPPODS;
1329 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
7b36b6e0 1330 idx, cnt, NULL, 0);
1331 if (err < 0)
1332 break;
1333 }
1334}
1335
1336static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1337 int pg_idx, bool reply)
1338{
1339 struct sk_buff *skb;
1340 struct cpl_set_tcb_field *req;
7b36b6e0 1341
e27d6169 1342 if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
7b36b6e0 1343 return 0;
1344
24d3f95a 1345 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1346 if (!skb)
1347 return -ENOMEM;
1348
e27d6169 1349 /* set up ulp page size */
7b36b6e0 1350 req = (struct cpl_set_tcb_field *)skb->head;
1351 INIT_TP_WR(req, csk->tid);
1352 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1353 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1354 req->word_cookie = htons(0);
1355 req->mask = cpu_to_be64(0x3 << 8);
1356 req->val = cpu_to_be64(pg_idx << 8);
7b36b6e0 1357 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1358
1359 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1360 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1361
1362 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1363 return 0;
1364}
1365
1366static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1367 int hcrc, int dcrc, int reply)
1368{
1369 struct sk_buff *skb;
1370 struct cpl_set_tcb_field *req;
7b36b6e0 1371
e27d6169 1372 if (!hcrc && !dcrc)
1373 return 0;
7b36b6e0 1374
24d3f95a 1375 skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
7b36b6e0 1376 if (!skb)
1377 return -ENOMEM;
1378
1379 csk->hcrc_len = (hcrc ? 4 : 0);
1380 csk->dcrc_len = (dcrc ? 4 : 0);
e27d6169 1381 /* set up ulp submode */
7b36b6e0 1382 req = (struct cpl_set_tcb_field *)skb->head;
1383 INIT_TP_WR(req, tid);
1384 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1385 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
e27d6169 1386 req->word_cookie = htons(0);
1387 req->mask = cpu_to_be64(0x3 << 4);
1388 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1389 (dcrc ? ULP_CRC_DATA : 0)) << 4);
7b36b6e0 1390 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1391
1392 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1393 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1394
1395 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1396 return 0;
1397}
1398
1399static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1400{
1401 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1402 struct cxgbi_ddp_info *ddp = cdev->ddp;
1403 unsigned int tagmask, pgsz_factor[4];
1404 int err;
1405
1406 if (ddp) {
1407 kref_get(&ddp->refcnt);
1408 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1409 cdev, cdev->ddp);
1410 return -EALREADY;
1411 }
1412
1413 err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1414 lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1415 lldi->iscsi_iolen, lldi->iscsi_iolen);
1416 if (err < 0)
1417 return err;
1418
1419 ddp = cdev->ddp;
1420
1421 tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1422 cxgbi_ddp_page_size_factor(pgsz_factor);
1423 cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1424
1425 cdev->csk_ddp_free_gl_skb = NULL;
1426 cdev->csk_ddp_alloc_gl_skb = NULL;
1427 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1428 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1429 cdev->csk_ddp_set = ddp_set_map;
1430 cdev->csk_ddp_clear = ddp_clear_map;
1431
1432 pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1433 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1434 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1435 pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1436 " %u/%u.\n",
1437 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1438 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1439 ddp->max_rxsz, lldi->iscsi_iolen);
1440 pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1441 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1442 ddp->max_rxsz);
1443 return 0;
1444}
1445
1446static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1447{
1448 struct cxgbi_device *cdev;
1449 struct port_info *pi;
1450 int i, rc;
1451
1452 cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1453 if (!cdev) {
1454 pr_info("t4 device 0x%p, register failed.\n", lldi);
1455 return NULL;
1456 }
1457 pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1458 cdev, lldi->adapter_type, lldi->nports,
1459 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1460 lldi->nrxq, lldi->wr_cred);
1461 for (i = 0; i < lldi->nrxq; i++)
1462 log_debug(1 << CXGBI_DBG_DEV,
1463 "t4 0x%p, rxq id #%d: %u.\n",
1464 cdev, i, lldi->rxq_ids[i]);
1465
1466 memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1467 cdev->flags = CXGBI_FLAG_DEV_T4;
1468 cdev->pdev = lldi->pdev;
1469 cdev->ports = lldi->ports;
1470 cdev->nports = lldi->nports;
1471 cdev->mtus = lldi->mtus;
1472 cdev->nmtus = NMTUS;
1473 cdev->snd_win = cxgb4i_snd_win;
1474 cdev->rcv_win = cxgb4i_rcv_win;
1475 cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1476 cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1477 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1478 cdev->itp = &cxgb4i_iscsi_transport;
1479
e27d6169 1480 cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1481 pr_info("cdev 0x%p,%s, pfvf %u.\n",
1482 cdev, lldi->ports[0]->name, cdev->pfvf);
1483
7b36b6e0 1484 rc = cxgb4i_ddp_init(cdev);
1485 if (rc) {
1486 pr_info("t4 0x%p ddp init failed.\n", cdev);
1487 goto err_out;
1488 }
1489 rc = cxgb4i_ofld_init(cdev);
1490 if (rc) {
1491 pr_info("t4 0x%p ofld init failed.\n", cdev);
1492 goto err_out;
1493 }
1494
1495 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1496 &cxgb4i_host_template, cxgb4i_stt);
1497 if (rc)
1498 goto err_out;
1499
1500 for (i = 0; i < cdev->nports; i++) {
1501 pi = netdev_priv(lldi->ports[i]);
1502 cdev->hbas[i]->port_id = pi->port_id;
1503 }
1504 return cdev;
1505
1506err_out:
1507 cxgbi_device_unregister(cdev);
1508 return ERR_PTR(-ENOMEM);
1509}
1510
1511#define RX_PULL_LEN 128
1512static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1513 const struct pkt_gl *pgl)
1514{
1515 const struct cpl_act_establish *rpl;
1516 struct sk_buff *skb;
1517 unsigned int opc;
1518 struct cxgbi_device *cdev = handle;
1519
1520 if (pgl == NULL) {
1521 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1522
24d3f95a 1523 skb = alloc_wr(len, 0, GFP_ATOMIC);
7b36b6e0 1524 if (!skb)
1525 goto nomem;
1526 skb_copy_to_linear_data(skb, &rsp[1], len);
1527 } else {
1528 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1529 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1530 pgl->va, be64_to_cpu(*rsp),
1531 be64_to_cpu(*(u64 *)pgl->va),
1532 pgl->tot_len);
1533 return 0;
1534 }
1535 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1536 if (unlikely(!skb))
1537 goto nomem;
1538 }
1539
1540 rpl = (struct cpl_act_establish *)skb->data;
1541 opc = rpl->ot.opcode;
1542 log_debug(1 << CXGBI_DBG_TOE,
1543 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1544 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1545 if (cxgb4i_cplhandlers[opc])
1546 cxgb4i_cplhandlers[opc](cdev, skb);
1547 else {
1548 pr_err("No handler for opcode 0x%x.\n", opc);
1549 __kfree_skb(skb);
1550 }
1551 return 0;
1552nomem:
1553 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1554 return 1;
1555}
1556
1557static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1558{
1559 struct cxgbi_device *cdev = handle;
1560
1561 switch (state) {
1562 case CXGB4_STATE_UP:
1563 pr_info("cdev 0x%p, UP.\n", cdev);
1564 /* re-initialize */
1565 break;
1566 case CXGB4_STATE_START_RECOVERY:
1567 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1568 /* close all connections */
1569 break;
1570 case CXGB4_STATE_DOWN:
1571 pr_info("cdev 0x%p, DOWN.\n", cdev);
1572 break;
1573 case CXGB4_STATE_DETACH:
1574 pr_info("cdev 0x%p, DETACH.\n", cdev);
1575 break;
1576 default:
1577 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1578 break;
1579 }
1580 return 0;
1581}
1582
1583static int __init cxgb4i_init_module(void)
1584{
1585 int rc;
1586
1587 printk(KERN_INFO "%s", version);
1588
1589 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1590 if (rc < 0)
1591 return rc;
1592 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1593 return 0;
1594}
1595
1596static void __exit cxgb4i_exit_module(void)
1597{
1598 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1599 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1600 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1601}
1602
1603module_init(cxgb4i_init_module);
1604module_exit(cxgb4i_exit_module);
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