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authorkxie@chelsio.com <kxie@chelsio.com>2010-08-16 23:55:53 -0400
committerJames Bottomley <James.Bottomley@suse.de>2010-09-05 13:29:07 -0400
commit7b36b6e03b0d6cee0948593a6a11841a457695b9 (patch)
tree6f68fa74acde025eb0759ada09b89697d61c5f54 /drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
parent9ba682f01e2ffe47e6ea47fcc6cdfe39d7a71571 (diff)
[SCSI] cxgb4i v5: iscsi driver
Added cxgb4i iSCSI driver. This patch implements the cxgb4i iscsi connection acceleration for the open-iscsi initiator. The cxgb4i driver offers the iscsi PDU based offload: - digest insertion and verification - payload direct-placement into host memory buffer. Signed-off-by: Karen Xie <kxie@chelsio.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/cxgbi/cxgb4i/cxgb4i.c')
-rw-r--r--drivers/scsi/cxgbi/cxgb4i/cxgb4i.c1600
1 files changed, 1600 insertions, 0 deletions
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
new file mode 100644
index 000000000000..b375a683a6b0
--- /dev/null
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -0,0 +1,1600 @@
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"
37#define DRV_MODULE_VERSION "0.9.0"
38#define DRV_MODULE_RELDATE "May 2010"
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
335 skb = alloc_cpl(sizeof(*req), 0, GFP_ATOMIC);
336 if (!skb) {
337 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
338 return 0;
339 }
340 req = (struct cpl_rx_data_ack *)skb->head;
341
342 set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
343 INIT_TP_WR(req, csk->tid);
344 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
345 csk->tid));
346 req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
347 cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
348 return credits;
349}
350
351/*
352 * sgl_len - calculates the size of an SGL of the given capacity
353 * @n: the number of SGL entries
354 * Calculates the number of flits needed for a scatter/gather list that
355 * can hold the given number of entries.
356 */
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;
391 skb = alloc_cpl(flowclen, 0, GFP_ATOMIC);
392 flowc = (struct fw_flowc_wr *)skb->head;
393 flowc->op_to_nparams =
394 htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
395 flowc->flowid_len16 =
396 htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
397 FW_WR_FLOWID(csk->tid));
398 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
399 flowc->mnemval[0].val = htonl(0);
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
571 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
572 "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
573 csk, csk->state, csk->flags, tid, atid, rcv_isn);
574
575 cxgbi_sock_get(csk);
576 csk->tid = tid;
577 cxgb4_insert_tid(lldi->tids, csk, tid);
578 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
579
580 free_atid(csk);
581
582 spin_lock_bh(&csk->lock);
583 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
584 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
585 csk, csk->state, csk->flags, csk->tid);
586
587 if (csk->retry_timer.function) {
588 del_timer(&csk->retry_timer);
589 csk->retry_timer.function = NULL;
590 }
591
592 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
593 /*
594 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
595 * pass through opt0.
596 */
597 if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
598 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
599
600 csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
601 if (GET_TCPOPT_TSTAMP(tcp_opt))
602 csk->advmss -= 12;
603 if (csk->advmss < 128)
604 csk->advmss = 128;
605
606 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
607 "csk 0x%p, mss_idx %u, advmss %u.\n",
608 csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
609
610 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
611
612 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
613 send_abort_req(csk);
614 else {
615 if (skb_queue_len(&csk->write_queue))
616 push_tx_frames(csk, 0);
617 cxgbi_conn_tx_open(csk);
618 }
619 spin_unlock_bh(&csk->lock);
620
621rel_skb:
622 __kfree_skb(skb);
623}
624
625static int act_open_rpl_status_to_errno(int status)
626{
627 switch (status) {
628 case CPL_ERR_CONN_RESET:
629 return -ECONNREFUSED;
630 case CPL_ERR_ARP_MISS:
631 return -EHOSTUNREACH;
632 case CPL_ERR_CONN_TIMEDOUT:
633 return -ETIMEDOUT;
634 case CPL_ERR_TCAM_FULL:
635 return -ENOMEM;
636 case CPL_ERR_CONN_EXIST:
637 return -EADDRINUSE;
638 default:
639 return -EIO;
640 }
641}
642
643static void csk_act_open_retry_timer(unsigned long data)
644{
645 struct sk_buff *skb;
646 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
647
648 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
649 "csk 0x%p,%u,0x%lx,%u.\n",
650 csk, csk->state, csk->flags, csk->tid);
651
652 cxgbi_sock_get(csk);
653 spin_lock_bh(&csk->lock);
654 skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
655 if (!skb)
656 cxgbi_sock_fail_act_open(csk, -ENOMEM);
657 else {
658 skb->sk = (struct sock *)csk;
659 t4_set_arp_err_handler(skb, csk,
660 cxgbi_sock_act_open_req_arp_failure);
661 send_act_open_req(csk, skb, csk->l2t);
662 }
663 spin_unlock_bh(&csk->lock);
664 cxgbi_sock_put(csk);
665}
666
667static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
668{
669 struct cxgbi_sock *csk;
670 struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
671 unsigned int tid = GET_TID(rpl);
672 unsigned int atid =
673 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
674 unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
675 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
676 struct tid_info *t = lldi->tids;
677
678 csk = lookup_atid(t, atid);
679 if (unlikely(!csk)) {
680 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
681 goto rel_skb;
682 }
683
684 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
685 "csk 0x%p,%u,0x%lx, status %u, atid %u, tid %u.\n",
686 csk, csk->state, csk->flags, status, atid, tid);
687
688 if (status && status != CPL_ERR_TCAM_FULL &&
689 status != CPL_ERR_CONN_EXIST &&
690 status != CPL_ERR_ARP_MISS)
691 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
692
693 cxgbi_sock_get(csk);
694 spin_lock_bh(&csk->lock);
695
696 if (status == CPL_ERR_CONN_EXIST &&
697 csk->retry_timer.function != csk_act_open_retry_timer) {
698 csk->retry_timer.function = csk_act_open_retry_timer;
699 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
700 } else
701 cxgbi_sock_fail_act_open(csk,
702 act_open_rpl_status_to_errno(status));
703
704 spin_unlock_bh(&csk->lock);
705 cxgbi_sock_put(csk);
706rel_skb:
707 __kfree_skb(skb);
708}
709
710static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
711{
712 struct cxgbi_sock *csk;
713 struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
714 unsigned int tid = GET_TID(req);
715 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
716 struct tid_info *t = lldi->tids;
717
718 csk = lookup_tid(t, tid);
719 if (unlikely(!csk)) {
720 pr_err("can't find connection for tid %u.\n", tid);
721 goto rel_skb;
722 }
723 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
724 "csk 0x%p,%u,0x%lx,%u.\n",
725 csk, csk->state, csk->flags, csk->tid);
726 cxgbi_sock_rcv_peer_close(csk);
727rel_skb:
728 __kfree_skb(skb);
729}
730
731static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
732{
733 struct cxgbi_sock *csk;
734 struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
735 unsigned int tid = GET_TID(rpl);
736 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
737 struct tid_info *t = lldi->tids;
738
739 csk = lookup_tid(t, tid);
740 if (unlikely(!csk)) {
741 pr_err("can't find connection for tid %u.\n", tid);
742 goto rel_skb;
743 }
744 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
745 "csk 0x%p,%u,0x%lx,%u.\n",
746 csk, csk->state, csk->flags, csk->tid);
747 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
748rel_skb:
749 __kfree_skb(skb);
750}
751
752static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
753 int *need_rst)
754{
755 switch (abort_reason) {
756 case CPL_ERR_BAD_SYN: /* fall through */
757 case CPL_ERR_CONN_RESET:
758 return csk->state > CTP_ESTABLISHED ?
759 -EPIPE : -ECONNRESET;
760 case CPL_ERR_XMIT_TIMEDOUT:
761 case CPL_ERR_PERSIST_TIMEDOUT:
762 case CPL_ERR_FINWAIT2_TIMEDOUT:
763 case CPL_ERR_KEEPALIVE_TIMEDOUT:
764 return -ETIMEDOUT;
765 default:
766 return -EIO;
767 }
768}
769
770static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
771{
772 struct cxgbi_sock *csk;
773 struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
774 unsigned int tid = GET_TID(req);
775 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
776 struct tid_info *t = lldi->tids;
777 int rst_status = CPL_ABORT_NO_RST;
778
779 csk = lookup_tid(t, tid);
780 if (unlikely(!csk)) {
781 pr_err("can't find connection for tid %u.\n", tid);
782 goto rel_skb;
783 }
784
785 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
786 "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
787 csk, csk->state, csk->flags, csk->tid, req->status);
788
789 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
790 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
791 goto rel_skb;
792
793 cxgbi_sock_get(csk);
794 spin_lock_bh(&csk->lock);
795
796 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
797 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
798 cxgbi_sock_set_state(csk, CTP_ABORTING);
799 goto done;
800 }
801
802 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
803 send_abort_rpl(csk, rst_status);
804
805 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
806 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
807 cxgbi_sock_closed(csk);
808 }
809done:
810 spin_unlock_bh(&csk->lock);
811 cxgbi_sock_put(csk);
812rel_skb:
813 __kfree_skb(skb);
814}
815
816static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
817{
818 struct cxgbi_sock *csk;
819 struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
820 unsigned int tid = GET_TID(rpl);
821 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
822 struct tid_info *t = lldi->tids;
823
824 csk = lookup_tid(t, tid);
825 if (!csk)
826 goto rel_skb;
827
828 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
829 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
830 rpl->status, csk, csk ? csk->state : 0,
831 csk ? csk->flags : 0UL);
832
833 if (rpl->status == CPL_ERR_ABORT_FAILED)
834 goto rel_skb;
835
836 cxgbi_sock_rcv_abort_rpl(csk);
837rel_skb:
838 __kfree_skb(skb);
839}
840
841static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
842{
843 struct cxgbi_sock *csk;
844 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
845 unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
846 unsigned int tid = GET_TID(cpl);
847 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
848 struct tid_info *t = lldi->tids;
849 struct sk_buff *lskb;
850
851 csk = lookup_tid(t, tid);
852 if (unlikely(!csk)) {
853 pr_err("can't find conn. for tid %u.\n", tid);
854 goto rel_skb;
855 }
856
857 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
858 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
859 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
860 pdu_len_ddp);
861
862 spin_lock_bh(&csk->lock);
863
864 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
865 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
866 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
867 csk, csk->state, csk->flags, csk->tid);
868 if (csk->state != CTP_ABORTING)
869 goto abort_conn;
870 else
871 goto discard;
872 }
873
874 cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
875 skb_reset_transport_header(skb);
876 __skb_pull(skb, sizeof(*cpl));
877 __pskb_trim(skb, ntohs(cpl->len));
878
879 if (!csk->skb_ulp_lhdr) {
880 unsigned char *bhs;
881 unsigned int hlen, dlen;
882
883 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
884 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
885 csk, csk->state, csk->flags, csk->tid, skb);
886 csk->skb_ulp_lhdr = skb;
887 lskb = csk->skb_ulp_lhdr;
888 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HDR);
889
890 if (cxgbi_skcb_tcp_seq(lskb) != csk->rcv_nxt) {
891 pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
892 csk->tid, cxgbi_skcb_tcp_seq(lskb),
893 csk->rcv_nxt);
894 goto abort_conn;
895 }
896
897 bhs = lskb->data;
898 hlen = ntohs(cpl->len);
899 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
900
901 if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
902 pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
903 "mismatch %u != %u + %u, seq 0x%x.\n",
904 csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40,
905 hlen, dlen, cxgbi_skcb_tcp_seq(skb));
906 goto abort_conn;
907 }
908
909 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
910 if (dlen)
911 cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
912 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
913
914 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
915 "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
916 csk, skb, *bhs, hlen, dlen,
917 ntohl(*((unsigned int *)(bhs + 16))),
918 ntohl(*((unsigned int *)(bhs + 24))));
919
920 } else {
921 lskb = csk->skb_ulp_lhdr;
922 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
923
924 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
925 "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
926 csk, csk->state, csk->flags, skb, lskb);
927 }
928
929 __skb_queue_tail(&csk->receive_queue, skb);
930 spin_unlock_bh(&csk->lock);
931 return;
932
933abort_conn:
934 send_abort_req(csk);
935discard:
936 spin_unlock_bh(&csk->lock);
937rel_skb:
938 __kfree_skb(skb);
939}
940
941static void do_rx_data_ddp(struct cxgbi_device *cdev,
942 struct sk_buff *skb)
943{
944 struct cxgbi_sock *csk;
945 struct sk_buff *lskb;
946 struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
947 unsigned int tid = GET_TID(rpl);
948 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
949 struct tid_info *t = lldi->tids;
950 unsigned int status = ntohl(rpl->ddpvld);
951
952 csk = lookup_tid(t, tid);
953 if (unlikely(!csk)) {
954 pr_err("can't find connection for tid %u.\n", tid);
955 goto rel_skb;
956 }
957
958 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
959 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
960 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
961
962 spin_lock_bh(&csk->lock);
963
964 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
965 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
966 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
967 csk, csk->state, csk->flags, csk->tid);
968 if (csk->state != CTP_ABORTING)
969 goto abort_conn;
970 else
971 goto discard;
972 }
973
974 if (!csk->skb_ulp_lhdr) {
975 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
976 goto abort_conn;
977 }
978
979 lskb = csk->skb_ulp_lhdr;
980 csk->skb_ulp_lhdr = NULL;
981
982 cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
983 cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
984
985 if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
986 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
987 csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
988
989 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
990 log_debug(1 << CXGBI_DBG_PDU_RX,
991 "csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad.\n",
992 csk, lskb, status);
993 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
994 }
995 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
996 log_debug(1 << CXGBI_DBG_PDU_RX,
997 "csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad.\n",
998 csk, lskb, status);
999 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1000 }
1001 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1002 log_debug(1 << CXGBI_DBG_PDU_RX,
1003 "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1004 csk, lskb, status);
1005 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1006 }
1007 if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1008 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1009 log_debug(1 << CXGBI_DBG_PDU_RX,
1010 "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1011 csk, lskb, status);
1012 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1013 }
1014 log_debug(1 << CXGBI_DBG_PDU_RX,
1015 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1016 csk, lskb, cxgbi_skcb_flags(lskb));
1017
1018 cxgbi_conn_pdu_ready(csk);
1019 spin_unlock_bh(&csk->lock);
1020 goto rel_skb;
1021
1022abort_conn:
1023 send_abort_req(csk);
1024discard:
1025 spin_unlock_bh(&csk->lock);
1026rel_skb:
1027 __kfree_skb(skb);
1028}
1029
1030static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1031{
1032 struct cxgbi_sock *csk;
1033 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1034 unsigned int tid = GET_TID(rpl);
1035 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1036 struct tid_info *t = lldi->tids;
1037
1038 csk = lookup_tid(t, tid);
1039 if (unlikely(!csk))
1040 pr_err("can't find connection for tid %u.\n", tid);
1041 else {
1042 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1043 "csk 0x%p,%u,0x%lx,%u.\n",
1044 csk, csk->state, csk->flags, csk->tid);
1045 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1046 rpl->seq_vld);
1047 }
1048 __kfree_skb(skb);
1049}
1050
1051static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1052{
1053 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1054 unsigned int tid = GET_TID(rpl);
1055 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1056 struct tid_info *t = lldi->tids;
1057 struct cxgbi_sock *csk;
1058
1059 csk = lookup_tid(t, tid);
1060 if (!csk)
1061 pr_err("can't find conn. for tid %u.\n", tid);
1062
1063 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1064 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1065 csk, csk->state, csk->flags, csk->tid, rpl->status);
1066
1067 if (rpl->status != CPL_ERR_NONE)
1068 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1069 csk, tid, rpl->status);
1070
1071 __kfree_skb(skb);
1072}
1073
1074static int alloc_cpls(struct cxgbi_sock *csk)
1075{
1076 csk->cpl_close = alloc_cpl(sizeof(struct cpl_close_con_req),
1077 0, GFP_NOIO);
1078 if (!csk->cpl_close)
1079 return -ENOMEM;
1080
1081 csk->cpl_abort_req = alloc_cpl(sizeof(struct cpl_abort_req),
1082 0, GFP_NOIO);
1083 if (!csk->cpl_abort_req)
1084 goto free_cpls;
1085
1086 csk->cpl_abort_rpl = alloc_cpl(sizeof(struct cpl_abort_rpl),
1087 0, GFP_NOIO);
1088 if (!csk->cpl_abort_rpl)
1089 goto free_cpls;
1090 return 0;
1091
1092free_cpls:
1093 cxgbi_sock_free_cpl_skbs(csk);
1094 return -ENOMEM;
1095}
1096
1097static inline void l2t_put(struct cxgbi_sock *csk)
1098{
1099 if (csk->l2t) {
1100 cxgb4_l2t_release(csk->l2t);
1101 csk->l2t = NULL;
1102 cxgbi_sock_put(csk);
1103 }
1104}
1105
1106static void release_offload_resources(struct cxgbi_sock *csk)
1107{
1108 struct cxgb4_lld_info *lldi;
1109
1110 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1111 "csk 0x%p,%u,0x%lx,%u.\n",
1112 csk, csk->state, csk->flags, csk->tid);
1113
1114 cxgbi_sock_free_cpl_skbs(csk);
1115 if (csk->wr_cred != csk->wr_max_cred) {
1116 cxgbi_sock_purge_wr_queue(csk);
1117 cxgbi_sock_reset_wr_list(csk);
1118 }
1119
1120 l2t_put(csk);
1121 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1122 free_atid(csk);
1123 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1124 lldi = cxgbi_cdev_priv(csk->cdev);
1125 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1126 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1127 cxgbi_sock_put(csk);
1128 }
1129 csk->dst = NULL;
1130 csk->cdev = NULL;
1131}
1132
1133static int init_act_open(struct cxgbi_sock *csk)
1134{
1135 struct cxgbi_device *cdev = csk->cdev;
1136 struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1137 struct net_device *ndev = cdev->ports[csk->port_id];
1138 struct port_info *pi = netdev_priv(ndev);
1139 struct sk_buff *skb = NULL;
1140 unsigned int step;
1141
1142 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1143 "csk 0x%p,%u,0x%lx,%u.\n",
1144 csk, csk->state, csk->flags, csk->tid);
1145
1146 csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1147 if (csk->atid < 0) {
1148 pr_err("%s, NO atid available.\n", ndev->name);
1149 return -EINVAL;
1150 }
1151 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1152 cxgbi_sock_get(csk);
1153
1154 csk->l2t = cxgb4_l2t_get(lldi->l2t, csk->dst->neighbour, ndev, 0);
1155 if (!csk->l2t) {
1156 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1157 goto rel_resource;
1158 }
1159 cxgbi_sock_get(csk);
1160
1161 skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_NOIO);
1162 if (!skb)
1163 goto rel_resource;
1164 skb->sk = (struct sock *)csk;
1165 t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1166
1167 if (!csk->mtu)
1168 csk->mtu = dst_mtu(csk->dst);
1169 cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1170 csk->tx_chan = cxgb4_port_chan(ndev);
1171 /* SMT two entries per row */
1172 csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1173 step = lldi->ntxq / lldi->nchan;
1174 csk->txq_idx = cxgb4_port_idx(ndev) * step;
1175 step = lldi->nrxq / lldi->nchan;
1176 csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1177 csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
1178 csk->wr_una_cred = 0;
1179 cxgbi_sock_reset_wr_list(csk);
1180 csk->err = 0;
1181 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1182 "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
1183 csk, pi->port_id, ndev->name, csk->tx_chan,
1184 csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
1185 csk->smac_idx);
1186
1187 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1188 send_act_open_req(csk, skb, csk->l2t);
1189 return 0;
1190
1191rel_resource:
1192 if (skb)
1193 __kfree_skb(skb);
1194 return -EINVAL;
1195}
1196
1197cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1198 [CPL_ACT_ESTABLISH] = do_act_establish,
1199 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1200 [CPL_PEER_CLOSE] = do_peer_close,
1201 [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1202 [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1203 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1204 [CPL_FW4_ACK] = do_fw4_ack,
1205 [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1206 [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1207 [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1208};
1209
1210int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1211{
1212 int rc;
1213
1214 if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1215 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1216
1217 rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1218 cxgb4i_max_connect);
1219 if (rc < 0)
1220 return rc;
1221
1222 cdev->csk_release_offload_resources = release_offload_resources;
1223 cdev->csk_push_tx_frames = push_tx_frames;
1224 cdev->csk_send_abort_req = send_abort_req;
1225 cdev->csk_send_close_req = send_close_req;
1226 cdev->csk_send_rx_credits = send_rx_credits;
1227 cdev->csk_alloc_cpls = alloc_cpls;
1228 cdev->csk_init_act_open = init_act_open;
1229
1230 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1231 return 0;
1232}
1233
1234/*
1235 * functions to program the pagepod in h/w
1236 */
1237static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
1238 unsigned int dlen, unsigned int pm_addr)
1239{
1240 struct ulptx_sgl *sgl;
1241 unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1242 sizeof(struct ulptx_sgl), 16);
1243
1244 INIT_ULPTX_WR(req, wr_len, 0, 0);
1245 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE));
1246 req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1247 req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1248 req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1249 sgl = (struct ulptx_sgl *)(req + 1);
1250 sgl->cmd_nsge = htonl(ULPTX_CMD(ULP_TX_SC_DSGL) | ULPTX_NSGE(1));
1251 sgl->len0 = htonl(dlen);
1252}
1253
1254static int ddp_ppod_write_sgl(struct cxgbi_device *cdev, unsigned int port_id,
1255 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1256 unsigned int npods,
1257 struct cxgbi_gather_list *gl,
1258 unsigned int gl_pidx)
1259{
1260 struct cxgbi_ddp_info *ddp = cdev->ddp;
1261 unsigned int dlen, pm_addr;
1262 struct sk_buff *skb;
1263 struct ulp_mem_io *req;
1264 struct ulptx_sgl *sgl;
1265 struct cxgbi_pagepod *ppod;
1266 unsigned int i;
1267
1268 dlen = PPOD_SIZE * npods;
1269 pm_addr = idx * PPOD_SIZE + ddp->llimit;
1270
1271 skb = alloc_cpl(sizeof(*req) + sizeof(*sgl), dlen, GFP_ATOMIC);
1272 if (!skb) {
1273 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1274 cdev, idx, npods);
1275 return -ENOMEM;
1276 }
1277 req = (struct ulp_mem_io *)skb->head;
1278 set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1279
1280 ulp_mem_io_set_hdr(req, dlen, pm_addr);
1281 sgl = (struct ulptx_sgl *)(req + 1);
1282 ppod = (struct cxgbi_pagepod *)(sgl + 1);
1283 sgl->addr0 = cpu_to_be64(virt_to_phys(ppod));
1284
1285 for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1286 if (!hdr && !gl)
1287 cxgbi_ddp_ppod_clear(ppod);
1288 else
1289 cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1290 }
1291
1292 cxgb4_ofld_send(cdev->ports[port_id], skb);
1293 return 0;
1294}
1295
1296static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1297 unsigned int idx, unsigned int npods,
1298 struct cxgbi_gather_list *gl)
1299{
1300 unsigned int i, cnt;
1301 int err = 0;
1302
1303 for (i = 0; i < npods; i += cnt, idx += cnt) {
1304 cnt = npods - i;
1305 if (cnt > ULPMEM_DSGL_MAX_NPPODS)
1306 cnt = ULPMEM_DSGL_MAX_NPPODS;
1307 err = ddp_ppod_write_sgl(csk->cdev, csk->port_id, hdr,
1308 idx, cnt, gl, 4 * i);
1309 if (err < 0)
1310 break;
1311 }
1312 return err;
1313}
1314
1315static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1316 unsigned int idx, unsigned int npods)
1317{
1318 unsigned int i, cnt;
1319 int err;
1320
1321 for (i = 0; i < npods; i += cnt, idx += cnt) {
1322 cnt = npods - i;
1323 if (cnt > ULPMEM_DSGL_MAX_NPPODS)
1324 cnt = ULPMEM_DSGL_MAX_NPPODS;
1325 err = ddp_ppod_write_sgl(chba->cdev, chba->port_id, NULL,
1326 idx, cnt, NULL, 0);
1327 if (err < 0)
1328 break;
1329 }
1330}
1331
1332static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1333 int pg_idx, bool reply)
1334{
1335 struct sk_buff *skb;
1336 struct cpl_set_tcb_field *req;
1337 u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0;
1338
1339 if (!pg_idx)
1340 return 0;
1341
1342 skb = alloc_cpl(sizeof(*req), 0, GFP_KERNEL);
1343 if (!skb)
1344 return -ENOMEM;
1345
1346 /* set up ulp submode and page size */
1347 val = (val & 0x03) << 2;
1348 val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI);
1349
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));
1354 req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW));
1355 req->mask = cpu_to_be64(TCB_ULP_TYPE(TCB_ULP_TYPE_MASK));
1356 req->val = cpu_to_be64(val);
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;
1371 u64 val = (hcrc ? ULP_CRC_HEADER : 0) | (dcrc ? ULP_CRC_DATA : 0);
1372
1373 val = TCB_ULP_RAW(val);
1374 val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI);
1375
1376 skb = alloc_cpl(sizeof(*req), 0, GFP_KERNEL);
1377 if (!skb)
1378 return -ENOMEM;
1379
1380 csk->hcrc_len = (hcrc ? 4 : 0);
1381 csk->dcrc_len = (dcrc ? 4 : 0);
1382 /* set up ulp submode and page size */
1383 req = (struct cpl_set_tcb_field *)skb->head;
1384 INIT_TP_WR(req, tid);
1385 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1386 req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1387 req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW));
1388 req->mask = cpu_to_be64(TCB_ULP_RAW(TCB_ULP_RAW_MASK));
1389 req->val = cpu_to_be64(val);
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
1480 rc = cxgb4i_ddp_init(cdev);
1481 if (rc) {
1482 pr_info("t4 0x%p ddp init failed.\n", cdev);
1483 goto err_out;
1484 }
1485 rc = cxgb4i_ofld_init(cdev);
1486 if (rc) {
1487 pr_info("t4 0x%p ofld init failed.\n", cdev);
1488 goto err_out;
1489 }
1490
1491 rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1492 &cxgb4i_host_template, cxgb4i_stt);
1493 if (rc)
1494 goto err_out;
1495
1496 for (i = 0; i < cdev->nports; i++) {
1497 pi = netdev_priv(lldi->ports[i]);
1498 cdev->hbas[i]->port_id = pi->port_id;
1499 }
1500 return cdev;
1501
1502err_out:
1503 cxgbi_device_unregister(cdev);
1504 return ERR_PTR(-ENOMEM);
1505}
1506
1507#define RX_PULL_LEN 128
1508static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1509 const struct pkt_gl *pgl)
1510{
1511 const struct cpl_act_establish *rpl;
1512 struct sk_buff *skb;
1513 unsigned int opc;
1514 struct cxgbi_device *cdev = handle;
1515
1516 if (pgl == NULL) {
1517 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1518
1519 skb = alloc_cpl(len, 0, GFP_ATOMIC);
1520 if (!skb)
1521 goto nomem;
1522 skb_copy_to_linear_data(skb, &rsp[1], len);
1523 } else {
1524 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1525 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1526 pgl->va, be64_to_cpu(*rsp),
1527 be64_to_cpu(*(u64 *)pgl->va),
1528 pgl->tot_len);
1529 return 0;
1530 }
1531 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1532 if (unlikely(!skb))
1533 goto nomem;
1534 }
1535
1536 rpl = (struct cpl_act_establish *)skb->data;
1537 opc = rpl->ot.opcode;
1538 log_debug(1 << CXGBI_DBG_TOE,
1539 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1540 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1541 if (cxgb4i_cplhandlers[opc])
1542 cxgb4i_cplhandlers[opc](cdev, skb);
1543 else {
1544 pr_err("No handler for opcode 0x%x.\n", opc);
1545 __kfree_skb(skb);
1546 }
1547 return 0;
1548nomem:
1549 log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1550 return 1;
1551}
1552
1553static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1554{
1555 struct cxgbi_device *cdev = handle;
1556
1557 switch (state) {
1558 case CXGB4_STATE_UP:
1559 pr_info("cdev 0x%p, UP.\n", cdev);
1560 /* re-initialize */
1561 break;
1562 case CXGB4_STATE_START_RECOVERY:
1563 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1564 /* close all connections */
1565 break;
1566 case CXGB4_STATE_DOWN:
1567 pr_info("cdev 0x%p, DOWN.\n", cdev);
1568 break;
1569 case CXGB4_STATE_DETACH:
1570 pr_info("cdev 0x%p, DETACH.\n", cdev);
1571 break;
1572 default:
1573 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1574 break;
1575 }
1576 return 0;
1577}
1578
1579static int __init cxgb4i_init_module(void)
1580{
1581 int rc;
1582
1583 printk(KERN_INFO "%s", version);
1584
1585 rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1586 if (rc < 0)
1587 return rc;
1588 cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1589 return 0;
1590}
1591
1592static void __exit cxgb4i_exit_module(void)
1593{
1594 cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1595 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1596 cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1597}
1598
1599module_init(cxgb4i_init_module);
1600module_exit(cxgb4i_exit_module);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 06:10:40 -0500