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6f7efaab | 1 | /* |
2 | * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management | |
3 | * | |
4 | * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
7 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
8 | * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this | |
9 | * release for licensing terms and conditions. | |
10 | * | |
11 | * Written by: Dimitris Michailidis (dm@chelsio.com) | |
12 | * Karen Xie (kxie@chelsio.com) | |
13 | */ | |
14 | ||
15 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ | |
16 | ||
17 | #include <linux/version.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | #include <scsi/scsi_host.h> | |
21 | ||
22 | #include "common.h" | |
23 | #include "t3_cpl.h" | |
24 | #include "t3cdev.h" | |
25 | #include "cxgb3_defs.h" | |
26 | #include "cxgb3_ctl_defs.h" | |
27 | #include "cxgb3_offload.h" | |
28 | #include "firmware_exports.h" | |
29 | #include "cxgb3i.h" | |
30 | ||
31 | static unsigned int dbg_level; | |
32 | #include "../libcxgbi.h" | |
33 | ||
34 | #define DRV_MODULE_NAME "cxgb3i" | |
35 | #define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver" | |
36 | #define DRV_MODULE_VERSION "2.0.0" | |
37 | #define DRV_MODULE_RELDATE "Jun. 2010" | |
38 | ||
39 | static char version[] = | |
40 | DRV_MODULE_DESC " " DRV_MODULE_NAME | |
41 | " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; | |
42 | ||
43 | MODULE_AUTHOR("Chelsio Communications, Inc."); | |
44 | MODULE_DESCRIPTION(DRV_MODULE_DESC); | |
45 | MODULE_VERSION(DRV_MODULE_VERSION); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | module_param(dbg_level, uint, 0644); | |
49 | MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); | |
50 | ||
51 | static int cxgb3i_rcv_win = 256 * 1024; | |
52 | module_param(cxgb3i_rcv_win, int, 0644); | |
53 | MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); | |
54 | ||
55 | static int cxgb3i_snd_win = 128 * 1024; | |
56 | module_param(cxgb3i_snd_win, int, 0644); | |
57 | MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); | |
58 | ||
59 | static int cxgb3i_rx_credit_thres = 10 * 1024; | |
60 | module_param(cxgb3i_rx_credit_thres, int, 0644); | |
61 | MODULE_PARM_DESC(rx_credit_thres, | |
62 | "RX credits return threshold in bytes (default=10KB)"); | |
63 | ||
64 | static unsigned int cxgb3i_max_connect = 8 * 1024; | |
65 | module_param(cxgb3i_max_connect, uint, 0644); | |
66 | MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); | |
67 | ||
68 | static unsigned int cxgb3i_sport_base = 20000; | |
69 | module_param(cxgb3i_sport_base, uint, 0644); | |
70 | MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); | |
71 | ||
72 | static void cxgb3i_dev_open(struct t3cdev *); | |
73 | static void cxgb3i_dev_close(struct t3cdev *); | |
74 | static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); | |
75 | ||
76 | static struct cxgb3_client t3_client = { | |
77 | .name = DRV_MODULE_NAME, | |
78 | .handlers = cxgb3i_cpl_handlers, | |
79 | .add = cxgb3i_dev_open, | |
80 | .remove = cxgb3i_dev_close, | |
81 | .event_handler = cxgb3i_dev_event_handler, | |
82 | }; | |
83 | ||
84 | static struct scsi_host_template cxgb3i_host_template = { | |
85 | .module = THIS_MODULE, | |
86 | .name = DRV_MODULE_NAME, | |
87 | .proc_name = DRV_MODULE_NAME, | |
88 | .can_queue = CXGB3I_SCSI_HOST_QDEPTH, | |
89 | .queuecommand = iscsi_queuecommand, | |
90 | .change_queue_depth = iscsi_change_queue_depth, | |
91 | .sg_tablesize = SG_ALL, | |
92 | .max_sectors = 0xFFFF, | |
93 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, | |
94 | .eh_abort_handler = iscsi_eh_abort, | |
95 | .eh_device_reset_handler = iscsi_eh_device_reset, | |
96 | .eh_target_reset_handler = iscsi_eh_recover_target, | |
97 | .target_alloc = iscsi_target_alloc, | |
98 | .use_clustering = DISABLE_CLUSTERING, | |
99 | .this_id = -1, | |
100 | }; | |
101 | ||
102 | static struct iscsi_transport cxgb3i_iscsi_transport = { | |
103 | .owner = THIS_MODULE, | |
104 | .name = DRV_MODULE_NAME, | |
105 | /* owner and name should be set already */ | |
106 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | |
107 | | CAP_DATADGST | CAP_DIGEST_OFFLOAD | | |
fdafd4df | 108 | CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, |
6f7efaab | 109 | .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH | |
110 | ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN | | |
111 | ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T | | |
112 | ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST | | |
113 | ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN | | |
114 | ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL | | |
115 | ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | | |
116 | ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT | | |
117 | ISCSI_PERSISTENT_ADDRESS | | |
118 | ISCSI_TARGET_NAME | ISCSI_TPGT | | |
119 | ISCSI_USERNAME | ISCSI_PASSWORD | | |
120 | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | | |
121 | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | | |
122 | ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | | |
123 | ISCSI_PING_TMO | ISCSI_RECV_TMO | | |
124 | ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, | |
125 | .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | | |
126 | ISCSI_HOST_INITIATOR_NAME | | |
127 | ISCSI_HOST_NETDEV_NAME, | |
128 | .get_host_param = cxgbi_get_host_param, | |
129 | .set_host_param = cxgbi_set_host_param, | |
130 | /* session management */ | |
131 | .create_session = cxgbi_create_session, | |
132 | .destroy_session = cxgbi_destroy_session, | |
133 | .get_session_param = iscsi_session_get_param, | |
134 | /* connection management */ | |
135 | .create_conn = cxgbi_create_conn, | |
136 | .bind_conn = cxgbi_bind_conn, | |
137 | .destroy_conn = iscsi_tcp_conn_teardown, | |
138 | .start_conn = iscsi_conn_start, | |
139 | .stop_conn = iscsi_conn_stop, | |
c71b9b66 | 140 | .get_conn_param = iscsi_conn_get_param, |
6f7efaab | 141 | .set_param = cxgbi_set_conn_param, |
142 | .get_stats = cxgbi_get_conn_stats, | |
143 | /* pdu xmit req from user space */ | |
144 | .send_pdu = iscsi_conn_send_pdu, | |
145 | /* task */ | |
146 | .init_task = iscsi_tcp_task_init, | |
147 | .xmit_task = iscsi_tcp_task_xmit, | |
148 | .cleanup_task = cxgbi_cleanup_task, | |
149 | /* pdu */ | |
150 | .alloc_pdu = cxgbi_conn_alloc_pdu, | |
151 | .init_pdu = cxgbi_conn_init_pdu, | |
152 | .xmit_pdu = cxgbi_conn_xmit_pdu, | |
153 | .parse_pdu_itt = cxgbi_parse_pdu_itt, | |
154 | /* TCP connect/disconnect */ | |
c71b9b66 | 155 | .get_ep_param = cxgbi_get_ep_param, |
6f7efaab | 156 | .ep_connect = cxgbi_ep_connect, |
157 | .ep_poll = cxgbi_ep_poll, | |
158 | .ep_disconnect = cxgbi_ep_disconnect, | |
159 | /* Error recovery timeout call */ | |
160 | .session_recovery_timedout = iscsi_session_recovery_timedout, | |
161 | }; | |
162 | ||
163 | static struct scsi_transport_template *cxgb3i_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 | ||
172 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); | |
173 | ||
174 | static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, | |
175 | const struct l2t_entry *e) | |
176 | { | |
177 | unsigned int wscale = cxgbi_sock_compute_wscale(cxgb3i_rcv_win); | |
178 | struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; | |
179 | ||
180 | skb->priority = CPL_PRIORITY_SETUP; | |
181 | ||
182 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
183 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); | |
184 | req->local_port = csk->saddr.sin_port; | |
185 | req->peer_port = csk->daddr.sin_port; | |
186 | req->local_ip = csk->saddr.sin_addr.s_addr; | |
187 | req->peer_ip = csk->daddr.sin_addr.s_addr; | |
188 | ||
189 | req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | | |
190 | V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | | |
191 | V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); | |
192 | req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | | |
193 | V_RCV_BUFSIZ(cxgb3i_rcv_win>>10)); | |
194 | ||
195 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
196 | "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", | |
197 | csk, csk->state, csk->flags, csk->atid, | |
198 | &req->local_ip, ntohs(req->local_port), | |
199 | &req->peer_ip, ntohs(req->peer_port), | |
200 | csk->mss_idx, e->idx, e->smt_idx); | |
201 | ||
202 | l2t_send(csk->cdev->lldev, skb, csk->l2t); | |
203 | } | |
204 | ||
205 | static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
206 | { | |
207 | cxgbi_sock_act_open_req_arp_failure(NULL, skb); | |
208 | } | |
209 | ||
210 | /* | |
211 | * CPL connection close request: host -> | |
212 | * | |
213 | * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to | |
214 | * the write queue (i.e., after any unsent txt data). | |
215 | */ | |
216 | static void send_close_req(struct cxgbi_sock *csk) | |
217 | { | |
218 | struct sk_buff *skb = csk->cpl_close; | |
219 | struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; | |
220 | unsigned int tid = csk->tid; | |
221 | ||
222 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
223 | "csk 0x%p,%u,0x%lx,%u.\n", | |
224 | csk, csk->state, csk->flags, csk->tid); | |
225 | ||
226 | csk->cpl_close = NULL; | |
227 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
228 | req->wr.wr_lo = htonl(V_WR_TID(tid)); | |
229 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); | |
230 | req->rsvd = htonl(csk->write_seq); | |
231 | ||
232 | cxgbi_sock_skb_entail(csk, skb); | |
233 | if (csk->state >= CTP_ESTABLISHED) | |
234 | push_tx_frames(csk, 1); | |
235 | } | |
236 | ||
237 | /* | |
238 | * CPL connection abort request: host -> | |
239 | * | |
240 | * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs | |
241 | * for the same connection and also that we do not try to send a message | |
242 | * after the connection has closed. | |
243 | */ | |
244 | static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) | |
245 | { | |
246 | struct cpl_abort_req *req = cplhdr(skb); | |
247 | ||
248 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
249 | "t3dev 0x%p, tid %u, skb 0x%p.\n", | |
250 | tdev, GET_TID(req), skb); | |
251 | req->cmd = CPL_ABORT_NO_RST; | |
252 | cxgb3_ofld_send(tdev, skb); | |
253 | } | |
254 | ||
255 | static void send_abort_req(struct cxgbi_sock *csk) | |
256 | { | |
257 | struct sk_buff *skb = csk->cpl_abort_req; | |
258 | struct cpl_abort_req *req; | |
259 | ||
260 | if (unlikely(csk->state == CTP_ABORTING || !skb)) | |
261 | return; | |
262 | cxgbi_sock_set_state(csk, CTP_ABORTING); | |
263 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); | |
264 | /* Purge the send queue so we don't send anything after an abort. */ | |
265 | cxgbi_sock_purge_write_queue(csk); | |
266 | ||
267 | csk->cpl_abort_req = NULL; | |
268 | req = (struct cpl_abort_req *)skb->head; | |
269 | skb->priority = CPL_PRIORITY_DATA; | |
270 | set_arp_failure_handler(skb, abort_arp_failure); | |
271 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); | |
272 | req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); | |
273 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); | |
274 | req->rsvd0 = htonl(csk->snd_nxt); | |
275 | req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); | |
276 | req->cmd = CPL_ABORT_SEND_RST; | |
277 | ||
278 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
279 | "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", | |
280 | csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, | |
281 | req->rsvd1); | |
282 | ||
283 | l2t_send(csk->cdev->lldev, skb, csk->l2t); | |
284 | } | |
285 | ||
286 | /* | |
287 | * CPL connection abort reply: host -> | |
288 | * | |
289 | * Send an ABORT_RPL message in response of the ABORT_REQ received. | |
290 | */ | |
291 | static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) | |
292 | { | |
293 | struct sk_buff *skb = csk->cpl_abort_rpl; | |
294 | struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; | |
295 | ||
296 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
297 | "csk 0x%p,%u,0x%lx,%u, status %d.\n", | |
298 | csk, csk->state, csk->flags, csk->tid, rst_status); | |
299 | ||
300 | csk->cpl_abort_rpl = NULL; | |
301 | skb->priority = CPL_PRIORITY_DATA; | |
302 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
303 | rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); | |
304 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); | |
305 | rpl->cmd = rst_status; | |
306 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
307 | } | |
308 | ||
309 | /* | |
310 | * CPL connection rx data ack: host -> | |
311 | * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of | |
312 | * credits sent. | |
313 | */ | |
314 | static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) | |
315 | { | |
316 | struct sk_buff *skb; | |
317 | struct cpl_rx_data_ack *req; | |
318 | u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); | |
319 | ||
320 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
321 | "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n", | |
322 | csk, csk->state, csk->flags, csk->tid, credits, dack); | |
323 | ||
24d3f95a | 324 | skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); |
6f7efaab | 325 | if (!skb) { |
326 | pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); | |
327 | return 0; | |
328 | } | |
329 | req = (struct cpl_rx_data_ack *)skb->head; | |
330 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
331 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); | |
332 | req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | | |
333 | V_RX_CREDITS(credits)); | |
334 | skb->priority = CPL_PRIORITY_ACK; | |
335 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
336 | return credits; | |
337 | } | |
338 | ||
339 | /* | |
340 | * CPL connection tx data: host -> | |
341 | * | |
342 | * Send iscsi PDU via TX_DATA CPL message. Returns the number of | |
343 | * credits sent. | |
344 | * Each TX_DATA consumes work request credit (wrs), so we need to keep track of | |
345 | * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). | |
346 | */ | |
347 | ||
348 | static unsigned int wrlen __read_mostly; | |
349 | static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; | |
350 | ||
351 | static void init_wr_tab(unsigned int wr_len) | |
352 | { | |
353 | int i; | |
354 | ||
355 | if (skb_wrs[1]) /* already initialized */ | |
356 | return; | |
357 | for (i = 1; i < SKB_WR_LIST_SIZE; i++) { | |
358 | int sgl_len = (3 * i) / 2 + (i & 1); | |
359 | ||
360 | sgl_len += 3; | |
361 | skb_wrs[i] = (sgl_len <= wr_len | |
362 | ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); | |
363 | } | |
364 | wrlen = wr_len * 8; | |
365 | } | |
366 | ||
367 | static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, | |
368 | int len, int req_completion) | |
369 | { | |
370 | struct tx_data_wr *req; | |
371 | struct l2t_entry *l2t = csk->l2t; | |
372 | ||
373 | skb_reset_transport_header(skb); | |
374 | req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req)); | |
375 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | | |
376 | (req_completion ? F_WR_COMPL : 0)); | |
377 | req->wr_lo = htonl(V_WR_TID(csk->tid)); | |
378 | /* len includes the length of any HW ULP additions */ | |
379 | req->len = htonl(len); | |
380 | /* V_TX_ULP_SUBMODE sets both the mode and submode */ | |
381 | req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) | | |
382 | V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); | |
383 | req->sndseq = htonl(csk->snd_nxt); | |
384 | req->param = htonl(V_TX_PORT(l2t->smt_idx)); | |
385 | ||
386 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { | |
387 | req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | | |
388 | V_TX_CPU_IDX(csk->rss_qid)); | |
389 | /* sendbuffer is in units of 32KB. */ | |
390 | req->param |= htonl(V_TX_SNDBUF(cxgb3i_snd_win >> 15)); | |
391 | cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); | |
392 | } | |
393 | } | |
394 | ||
395 | /** | |
396 | * push_tx_frames -- start transmit | |
397 | * @c3cn: the offloaded connection | |
398 | * @req_completion: request wr_ack or not | |
399 | * | |
400 | * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a | |
401 | * connection's send queue and sends them on to T3. Must be called with the | |
402 | * connection's lock held. Returns the amount of send buffer space that was | |
403 | * freed as a result of sending queued data to T3. | |
404 | */ | |
405 | ||
406 | static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) | |
407 | { | |
408 | kfree_skb(skb); | |
409 | } | |
410 | ||
411 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) | |
412 | { | |
413 | int total_size = 0; | |
414 | struct sk_buff *skb; | |
415 | ||
416 | if (unlikely(csk->state < CTP_ESTABLISHED || | |
417 | csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { | |
418 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
419 | "csk 0x%p,%u,0x%lx,%u, in closing state.\n", | |
420 | csk, csk->state, csk->flags, csk->tid); | |
421 | return 0; | |
422 | } | |
423 | ||
424 | while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { | |
425 | int len = skb->len; /* length before skb_push */ | |
426 | int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); | |
427 | int wrs_needed = skb_wrs[frags]; | |
428 | ||
429 | if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) | |
430 | wrs_needed = 1; | |
431 | ||
432 | WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); | |
433 | ||
434 | if (csk->wr_cred < wrs_needed) { | |
435 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
436 | "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n", | |
437 | csk, skb->len, skb->data_len, frags, | |
438 | wrs_needed, csk->wr_cred); | |
439 | break; | |
440 | } | |
441 | ||
442 | __skb_unlink(skb, &csk->write_queue); | |
443 | skb->priority = CPL_PRIORITY_DATA; | |
444 | skb->csum = wrs_needed; /* remember this until the WR_ACK */ | |
445 | csk->wr_cred -= wrs_needed; | |
446 | csk->wr_una_cred += wrs_needed; | |
447 | cxgbi_sock_enqueue_wr(csk, skb); | |
448 | ||
449 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
450 | "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, " | |
451 | "left %u, unack %u.\n", | |
452 | csk, skb->len, skb->data_len, frags, skb->csum, | |
453 | csk->wr_cred, csk->wr_una_cred); | |
454 | ||
455 | if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { | |
456 | if ((req_completion && | |
457 | csk->wr_una_cred == wrs_needed) || | |
458 | csk->wr_una_cred >= csk->wr_max_cred / 2) { | |
459 | req_completion = 1; | |
460 | csk->wr_una_cred = 0; | |
461 | } | |
462 | len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); | |
463 | make_tx_data_wr(csk, skb, len, req_completion); | |
464 | csk->snd_nxt += len; | |
465 | cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); | |
466 | } | |
467 | total_size += skb->truesize; | |
468 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
469 | "csk 0x%p, tid 0x%x, send skb 0x%p.\n", | |
470 | csk, csk->tid, skb); | |
471 | set_arp_failure_handler(skb, arp_failure_skb_discard); | |
472 | l2t_send(csk->cdev->lldev, skb, csk->l2t); | |
473 | } | |
474 | return total_size; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Process a CPL_ACT_ESTABLISH message: -> host | |
479 | * Updates connection state from an active establish CPL message. Runs with | |
480 | * the connection lock held. | |
481 | */ | |
482 | ||
483 | static inline void free_atid(struct cxgbi_sock *csk) | |
484 | { | |
485 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { | |
486 | cxgb3_free_atid(csk->cdev->lldev, csk->atid); | |
487 | cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); | |
488 | cxgbi_sock_put(csk); | |
489 | } | |
490 | } | |
491 | ||
492 | static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
493 | { | |
494 | struct cxgbi_sock *csk = ctx; | |
495 | struct cpl_act_establish *req = cplhdr(skb); | |
496 | unsigned int tid = GET_TID(req); | |
497 | unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); | |
498 | u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ | |
499 | ||
500 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
501 | "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", | |
502 | atid, atid, csk, csk->state, csk->flags, rcv_isn); | |
503 | ||
504 | cxgbi_sock_get(csk); | |
505 | cxgbi_sock_set_flag(csk, CTPF_HAS_TID); | |
506 | csk->tid = tid; | |
507 | cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid); | |
508 | ||
509 | free_atid(csk); | |
510 | ||
511 | csk->rss_qid = G_QNUM(ntohs(skb->csum)); | |
512 | ||
513 | spin_lock_bh(&csk->lock); | |
514 | if (csk->retry_timer.function) { | |
515 | del_timer(&csk->retry_timer); | |
516 | csk->retry_timer.function = NULL; | |
517 | } | |
518 | ||
519 | if (unlikely(csk->state != CTP_ACTIVE_OPEN)) | |
520 | pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", | |
521 | csk, csk->state, csk->flags, csk->tid); | |
522 | ||
523 | csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; | |
524 | if (cxgb3i_rcv_win > (M_RCV_BUFSIZ << 10)) | |
525 | csk->rcv_wup -= cxgb3i_rcv_win - (M_RCV_BUFSIZ << 10); | |
526 | ||
527 | cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); | |
528 | ||
529 | if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) | |
530 | /* upper layer has requested closing */ | |
531 | send_abort_req(csk); | |
532 | else { | |
533 | if (skb_queue_len(&csk->write_queue)) | |
534 | push_tx_frames(csk, 1); | |
535 | cxgbi_conn_tx_open(csk); | |
536 | } | |
537 | ||
538 | spin_unlock_bh(&csk->lock); | |
539 | __kfree_skb(skb); | |
540 | return 0; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Process a CPL_ACT_OPEN_RPL message: -> host | |
545 | * Handle active open failures. | |
546 | */ | |
547 | static int act_open_rpl_status_to_errno(int status) | |
548 | { | |
549 | switch (status) { | |
550 | case CPL_ERR_CONN_RESET: | |
551 | return -ECONNREFUSED; | |
552 | case CPL_ERR_ARP_MISS: | |
553 | return -EHOSTUNREACH; | |
554 | case CPL_ERR_CONN_TIMEDOUT: | |
555 | return -ETIMEDOUT; | |
556 | case CPL_ERR_TCAM_FULL: | |
557 | return -ENOMEM; | |
558 | case CPL_ERR_CONN_EXIST: | |
559 | return -EADDRINUSE; | |
560 | default: | |
561 | return -EIO; | |
562 | } | |
563 | } | |
564 | ||
565 | static void act_open_retry_timer(unsigned long data) | |
566 | { | |
567 | struct sk_buff *skb; | |
568 | struct cxgbi_sock *csk = (struct cxgbi_sock *)data; | |
569 | ||
570 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
571 | "csk 0x%p,%u,0x%lx,%u.\n", | |
572 | csk, csk->state, csk->flags, csk->tid); | |
573 | ||
574 | cxgbi_sock_get(csk); | |
575 | spin_lock_bh(&csk->lock); | |
24d3f95a | 576 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); |
6f7efaab | 577 | if (!skb) |
578 | cxgbi_sock_fail_act_open(csk, -ENOMEM); | |
579 | else { | |
580 | skb->sk = (struct sock *)csk; | |
581 | set_arp_failure_handler(skb, act_open_arp_failure); | |
582 | send_act_open_req(csk, skb, csk->l2t); | |
583 | } | |
584 | spin_unlock_bh(&csk->lock); | |
585 | cxgbi_sock_put(csk); | |
586 | } | |
587 | ||
588 | static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
589 | { | |
590 | struct cxgbi_sock *csk = ctx; | |
591 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
592 | ||
0b3d8947 | 593 | pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n", |
594 | csk, csk->state, csk->flags, csk->atid, rpl->status, | |
595 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), | |
596 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); | |
6f7efaab | 597 | |
598 | if (rpl->status != CPL_ERR_TCAM_FULL && | |
599 | rpl->status != CPL_ERR_CONN_EXIST && | |
600 | rpl->status != CPL_ERR_ARP_MISS) | |
601 | cxgb3_queue_tid_release(tdev, GET_TID(rpl)); | |
602 | ||
603 | cxgbi_sock_get(csk); | |
604 | spin_lock_bh(&csk->lock); | |
605 | if (rpl->status == CPL_ERR_CONN_EXIST && | |
606 | csk->retry_timer.function != act_open_retry_timer) { | |
607 | csk->retry_timer.function = act_open_retry_timer; | |
608 | mod_timer(&csk->retry_timer, jiffies + HZ / 2); | |
609 | } else | |
610 | cxgbi_sock_fail_act_open(csk, | |
611 | act_open_rpl_status_to_errno(rpl->status)); | |
612 | ||
613 | spin_unlock_bh(&csk->lock); | |
614 | cxgbi_sock_put(csk); | |
615 | __kfree_skb(skb); | |
616 | return 0; | |
617 | } | |
618 | ||
619 | /* | |
620 | * Process PEER_CLOSE CPL messages: -> host | |
621 | * Handle peer FIN. | |
622 | */ | |
623 | static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
624 | { | |
625 | struct cxgbi_sock *csk = ctx; | |
626 | ||
627 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
628 | "csk 0x%p,%u,0x%lx,%u.\n", | |
629 | csk, csk->state, csk->flags, csk->tid); | |
630 | ||
631 | cxgbi_sock_rcv_peer_close(csk); | |
632 | __kfree_skb(skb); | |
633 | return 0; | |
634 | } | |
635 | ||
636 | /* | |
637 | * Process CLOSE_CONN_RPL CPL message: -> host | |
638 | * Process a peer ACK to our FIN. | |
639 | */ | |
640 | static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, | |
641 | void *ctx) | |
642 | { | |
643 | struct cxgbi_sock *csk = ctx; | |
644 | struct cpl_close_con_rpl *rpl = cplhdr(skb); | |
645 | ||
646 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
647 | "csk 0x%p,%u,0x%lx,%u, snxt %u.\n", | |
648 | csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt)); | |
649 | ||
650 | cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); | |
651 | __kfree_skb(skb); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | /* | |
656 | * Process ABORT_REQ_RSS CPL message: -> host | |
657 | * Process abort requests. If we are waiting for an ABORT_RPL we ignore this | |
658 | * request except that we need to reply to it. | |
659 | */ | |
660 | ||
661 | static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, | |
662 | int *need_rst) | |
663 | { | |
664 | switch (abort_reason) { | |
665 | case CPL_ERR_BAD_SYN: /* fall through */ | |
666 | case CPL_ERR_CONN_RESET: | |
0b3d8947 | 667 | return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET; |
6f7efaab | 668 | case CPL_ERR_XMIT_TIMEDOUT: |
669 | case CPL_ERR_PERSIST_TIMEDOUT: | |
670 | case CPL_ERR_FINWAIT2_TIMEDOUT: | |
671 | case CPL_ERR_KEEPALIVE_TIMEDOUT: | |
672 | return -ETIMEDOUT; | |
673 | default: | |
674 | return -EIO; | |
675 | } | |
676 | } | |
677 | ||
678 | static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
679 | { | |
680 | const struct cpl_abort_req_rss *req = cplhdr(skb); | |
681 | struct cxgbi_sock *csk = ctx; | |
682 | int rst_status = CPL_ABORT_NO_RST; | |
683 | ||
684 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
685 | "csk 0x%p,%u,0x%lx,%u.\n", | |
686 | csk, csk->state, csk->flags, csk->tid); | |
687 | ||
688 | if (req->status == CPL_ERR_RTX_NEG_ADVICE || | |
689 | req->status == CPL_ERR_PERSIST_NEG_ADVICE) { | |
690 | goto done; | |
691 | } | |
692 | ||
693 | cxgbi_sock_get(csk); | |
694 | spin_lock_bh(&csk->lock); | |
695 | ||
696 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { | |
697 | cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); | |
698 | cxgbi_sock_set_state(csk, CTP_ABORTING); | |
699 | goto out; | |
700 | } | |
701 | ||
702 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); | |
703 | send_abort_rpl(csk, rst_status); | |
704 | ||
705 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { | |
706 | csk->err = abort_status_to_errno(csk, req->status, &rst_status); | |
707 | cxgbi_sock_closed(csk); | |
708 | } | |
709 | ||
710 | out: | |
711 | spin_unlock_bh(&csk->lock); | |
712 | cxgbi_sock_put(csk); | |
713 | done: | |
714 | __kfree_skb(skb); | |
715 | return 0; | |
716 | } | |
717 | ||
718 | /* | |
719 | * Process ABORT_RPL_RSS CPL message: -> host | |
720 | * Process abort replies. We only process these messages if we anticipate | |
721 | * them as the coordination between SW and HW in this area is somewhat lacking | |
722 | * and sometimes we get ABORT_RPLs after we are done with the connection that | |
723 | * originated the ABORT_REQ. | |
724 | */ | |
725 | static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
726 | { | |
727 | struct cpl_abort_rpl_rss *rpl = cplhdr(skb); | |
728 | struct cxgbi_sock *csk = ctx; | |
729 | ||
730 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
731 | "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", | |
732 | rpl->status, csk, csk ? csk->state : 0, | |
733 | csk ? csk->flags : 0UL); | |
734 | /* | |
735 | * Ignore replies to post-close aborts indicating that the abort was | |
736 | * requested too late. These connections are terminated when we get | |
737 | * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss | |
738 | * arrives the TID is either no longer used or it has been recycled. | |
739 | */ | |
740 | if (rpl->status == CPL_ERR_ABORT_FAILED) | |
741 | goto rel_skb; | |
742 | /* | |
743 | * Sometimes we've already closed the connection, e.g., a post-close | |
744 | * abort races with ABORT_REQ_RSS, the latter frees the connection | |
745 | * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, | |
746 | * but FW turns the ABORT_REQ into a regular one and so we get | |
747 | * ABORT_RPL_RSS with status 0 and no connection. | |
748 | */ | |
749 | if (csk) | |
750 | cxgbi_sock_rcv_abort_rpl(csk); | |
751 | rel_skb: | |
752 | __kfree_skb(skb); | |
753 | return 0; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Process RX_ISCSI_HDR CPL message: -> host | |
758 | * Handle received PDUs, the payload could be DDP'ed. If not, the payload | |
759 | * follow after the bhs. | |
760 | */ | |
761 | static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) | |
762 | { | |
763 | struct cxgbi_sock *csk = ctx; | |
764 | struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); | |
765 | struct cpl_iscsi_hdr_norss data_cpl; | |
766 | struct cpl_rx_data_ddp_norss ddp_cpl; | |
767 | unsigned int hdr_len, data_len, status; | |
768 | unsigned int len; | |
769 | int err; | |
770 | ||
771 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
772 | "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n", | |
773 | csk, csk->state, csk->flags, csk->tid, skb, skb->len); | |
774 | ||
775 | spin_lock_bh(&csk->lock); | |
776 | ||
777 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { | |
778 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
779 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
780 | csk, csk->state, csk->flags, csk->tid); | |
781 | if (csk->state != CTP_ABORTING) | |
782 | goto abort_conn; | |
783 | else | |
784 | goto discard; | |
785 | } | |
786 | ||
787 | cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq); | |
788 | cxgbi_skcb_flags(skb) = 0; | |
789 | ||
790 | skb_reset_transport_header(skb); | |
791 | __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); | |
792 | ||
793 | len = hdr_len = ntohs(hdr_cpl->len); | |
794 | /* msg coalesce is off or not enough data received */ | |
795 | if (skb->len <= hdr_len) { | |
796 | pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n", | |
797 | csk->cdev->ports[csk->port_id]->name, csk->tid, | |
798 | skb->len, hdr_len); | |
799 | goto abort_conn; | |
800 | } | |
801 | cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED); | |
802 | ||
803 | err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, | |
804 | sizeof(ddp_cpl)); | |
805 | if (err < 0) { | |
806 | pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n", | |
807 | csk->cdev->ports[csk->port_id]->name, csk->tid, | |
808 | skb->len, sizeof(ddp_cpl), err); | |
809 | goto abort_conn; | |
810 | } | |
811 | ||
812 | cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); | |
813 | cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len); | |
814 | cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); | |
815 | status = ntohl(ddp_cpl.ddp_status); | |
816 | ||
817 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
818 | "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n", | |
819 | csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status); | |
820 | ||
821 | if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) | |
822 | cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); | |
823 | if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) | |
824 | cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); | |
825 | if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) | |
826 | cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); | |
827 | ||
828 | if (skb->len > (hdr_len + sizeof(ddp_cpl))) { | |
829 | err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); | |
830 | if (err < 0) { | |
831 | pr_err("%s: tid %u, cp %zu/%u failed %d.\n", | |
832 | csk->cdev->ports[csk->port_id]->name, | |
833 | csk->tid, sizeof(data_cpl), skb->len, err); | |
834 | goto abort_conn; | |
835 | } | |
836 | data_len = ntohs(data_cpl.len); | |
837 | log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX, | |
838 | "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n", | |
839 | skb, data_len, cxgbi_skcb_rx_pdulen(skb), status); | |
840 | len += sizeof(data_cpl) + data_len; | |
841 | } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) | |
842 | cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); | |
843 | ||
844 | csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb); | |
845 | __pskb_trim(skb, len); | |
846 | __skb_queue_tail(&csk->receive_queue, skb); | |
847 | cxgbi_conn_pdu_ready(csk); | |
848 | ||
849 | spin_unlock_bh(&csk->lock); | |
850 | return 0; | |
851 | ||
852 | abort_conn: | |
853 | send_abort_req(csk); | |
854 | discard: | |
855 | spin_unlock_bh(&csk->lock); | |
856 | __kfree_skb(skb); | |
857 | return 0; | |
858 | } | |
859 | ||
860 | /* | |
861 | * Process TX_DATA_ACK CPL messages: -> host | |
862 | * Process an acknowledgment of WR completion. Advance snd_una and send the | |
863 | * next batch of work requests from the write queue. | |
864 | */ | |
865 | static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
866 | { | |
867 | struct cxgbi_sock *csk = ctx; | |
868 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
869 | ||
870 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
871 | "csk 0x%p,%u,0x%lx,%u, cr %u.\n", | |
872 | csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits)); | |
873 | ||
874 | cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1); | |
875 | __kfree_skb(skb); | |
876 | return 0; | |
877 | } | |
878 | ||
879 | /* | |
880 | * for each connection, pre-allocate skbs needed for close/abort requests. So | |
881 | * that we can service the request right away. | |
882 | */ | |
883 | static int alloc_cpls(struct cxgbi_sock *csk) | |
884 | { | |
24d3f95a | 885 | csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0, |
6f7efaab | 886 | GFP_KERNEL); |
887 | if (!csk->cpl_close) | |
888 | return -ENOMEM; | |
24d3f95a | 889 | csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0, |
6f7efaab | 890 | GFP_KERNEL); |
891 | if (!csk->cpl_abort_req) | |
892 | goto free_cpl_skbs; | |
893 | ||
24d3f95a | 894 | csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0, |
6f7efaab | 895 | GFP_KERNEL); |
896 | if (!csk->cpl_abort_rpl) | |
897 | goto free_cpl_skbs; | |
898 | ||
899 | return 0; | |
900 | ||
901 | free_cpl_skbs: | |
902 | cxgbi_sock_free_cpl_skbs(csk); | |
903 | return -ENOMEM; | |
904 | } | |
905 | ||
906 | /** | |
907 | * release_offload_resources - release offload resource | |
908 | * @c3cn: the offloaded iscsi tcp connection. | |
909 | * Release resources held by an offload connection (TID, L2T entry, etc.) | |
910 | */ | |
911 | static void l2t_put(struct cxgbi_sock *csk) | |
912 | { | |
913 | struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; | |
914 | ||
915 | if (csk->l2t) { | |
916 | l2t_release(L2DATA(t3dev), csk->l2t); | |
917 | csk->l2t = NULL; | |
918 | cxgbi_sock_put(csk); | |
919 | } | |
920 | } | |
921 | ||
922 | static void release_offload_resources(struct cxgbi_sock *csk) | |
923 | { | |
924 | struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; | |
925 | ||
926 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
927 | "csk 0x%p,%u,0x%lx,%u.\n", | |
928 | csk, csk->state, csk->flags, csk->tid); | |
929 | ||
930 | csk->rss_qid = 0; | |
931 | cxgbi_sock_free_cpl_skbs(csk); | |
932 | ||
933 | if (csk->wr_cred != csk->wr_max_cred) { | |
934 | cxgbi_sock_purge_wr_queue(csk); | |
935 | cxgbi_sock_reset_wr_list(csk); | |
936 | } | |
937 | l2t_put(csk); | |
938 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) | |
939 | free_atid(csk); | |
940 | else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { | |
941 | cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); | |
942 | cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); | |
943 | cxgbi_sock_put(csk); | |
944 | } | |
945 | csk->dst = NULL; | |
946 | csk->cdev = NULL; | |
947 | } | |
948 | ||
0b3d8947 | 949 | static void update_address(struct cxgbi_hba *chba) |
950 | { | |
951 | if (chba->ipv4addr) { | |
952 | if (chba->vdev && | |
953 | chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) { | |
954 | cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr); | |
955 | cxgb3i_set_private_ipv4addr(chba->ndev, 0); | |
956 | pr_info("%s set %pI4.\n", | |
957 | chba->vdev->name, &chba->ipv4addr); | |
958 | } else if (chba->ipv4addr != | |
959 | cxgb3i_get_private_ipv4addr(chba->ndev)) { | |
960 | cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr); | |
961 | pr_info("%s set %pI4.\n", | |
962 | chba->ndev->name, &chba->ipv4addr); | |
963 | } | |
964 | } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) { | |
965 | if (chba->vdev) | |
966 | cxgb3i_set_private_ipv4addr(chba->vdev, 0); | |
967 | cxgb3i_set_private_ipv4addr(chba->ndev, 0); | |
968 | } | |
969 | } | |
970 | ||
6f7efaab | 971 | static int init_act_open(struct cxgbi_sock *csk) |
972 | { | |
973 | struct dst_entry *dst = csk->dst; | |
974 | struct cxgbi_device *cdev = csk->cdev; | |
975 | struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; | |
976 | struct net_device *ndev = cdev->ports[csk->port_id]; | |
0b3d8947 | 977 | struct cxgbi_hba *chba = cdev->hbas[csk->port_id]; |
6f7efaab | 978 | struct sk_buff *skb = NULL; |
979 | ||
980 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
981 | "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags); | |
982 | ||
0b3d8947 | 983 | update_address(chba); |
984 | if (chba->ipv4addr) | |
985 | csk->saddr.sin_addr.s_addr = chba->ipv4addr; | |
986 | ||
6f7efaab | 987 | csk->rss_qid = 0; |
69cce1d1 | 988 | csk->l2t = t3_l2t_get(t3dev, dst_get_neighbour(dst), ndev); |
6f7efaab | 989 | if (!csk->l2t) { |
990 | pr_err("NO l2t available.\n"); | |
991 | return -EINVAL; | |
992 | } | |
993 | cxgbi_sock_get(csk); | |
994 | ||
995 | csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); | |
996 | if (csk->atid < 0) { | |
997 | pr_err("NO atid available.\n"); | |
998 | goto rel_resource; | |
999 | } | |
1000 | cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); | |
1001 | cxgbi_sock_get(csk); | |
1002 | ||
24d3f95a | 1003 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); |
6f7efaab | 1004 | if (!skb) |
1005 | goto rel_resource; | |
1006 | skb->sk = (struct sock *)csk; | |
1007 | set_arp_failure_handler(skb, act_open_arp_failure); | |
1008 | ||
1009 | csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; | |
1010 | csk->wr_una_cred = 0; | |
1011 | csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); | |
1012 | cxgbi_sock_reset_wr_list(csk); | |
1013 | csk->err = 0; | |
1014 | ||
0b3d8947 | 1015 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1016 | "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n", | |
1017 | csk, csk->state, csk->flags, | |
1018 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), | |
1019 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); | |
1020 | ||
6f7efaab | 1021 | cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); |
1022 | send_act_open_req(csk, skb, csk->l2t); | |
1023 | return 0; | |
1024 | ||
1025 | rel_resource: | |
1026 | if (skb) | |
1027 | __kfree_skb(skb); | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | ||
1031 | cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { | |
1032 | [CPL_ACT_ESTABLISH] = do_act_establish, | |
1033 | [CPL_ACT_OPEN_RPL] = do_act_open_rpl, | |
1034 | [CPL_PEER_CLOSE] = do_peer_close, | |
1035 | [CPL_ABORT_REQ_RSS] = do_abort_req, | |
1036 | [CPL_ABORT_RPL_RSS] = do_abort_rpl, | |
1037 | [CPL_CLOSE_CON_RPL] = do_close_con_rpl, | |
1038 | [CPL_TX_DMA_ACK] = do_wr_ack, | |
1039 | [CPL_ISCSI_HDR] = do_iscsi_hdr, | |
1040 | }; | |
1041 | ||
1042 | /** | |
1043 | * cxgb3i_ofld_init - allocate and initialize resources for each adapter found | |
1044 | * @cdev: cxgbi adapter | |
1045 | */ | |
1046 | int cxgb3i_ofld_init(struct cxgbi_device *cdev) | |
1047 | { | |
1048 | struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; | |
1049 | struct adap_ports port; | |
1050 | struct ofld_page_info rx_page_info; | |
1051 | unsigned int wr_len; | |
1052 | int rc; | |
1053 | ||
1054 | if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || | |
1055 | t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || | |
1056 | t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { | |
1057 | pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev); | |
1058 | return -EINVAL; | |
1059 | } | |
1060 | ||
1061 | if (cxgb3i_max_connect > CXGBI_MAX_CONN) | |
1062 | cxgb3i_max_connect = CXGBI_MAX_CONN; | |
1063 | ||
1064 | rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, | |
1065 | cxgb3i_max_connect); | |
1066 | if (rc < 0) | |
1067 | return rc; | |
1068 | ||
1069 | init_wr_tab(wr_len); | |
1070 | cdev->csk_release_offload_resources = release_offload_resources; | |
1071 | cdev->csk_push_tx_frames = push_tx_frames; | |
1072 | cdev->csk_send_abort_req = send_abort_req; | |
1073 | cdev->csk_send_close_req = send_close_req; | |
1074 | cdev->csk_send_rx_credits = send_rx_credits; | |
1075 | cdev->csk_alloc_cpls = alloc_cpls; | |
1076 | cdev->csk_init_act_open = init_act_open; | |
1077 | ||
1078 | pr_info("cdev 0x%p, offload up, added.\n", cdev); | |
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * functions to program the pagepod in h/w | |
1084 | */ | |
1085 | static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) | |
1086 | { | |
1087 | struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; | |
1088 | ||
1089 | memset(req, 0, sizeof(*req)); | |
1090 | ||
1091 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); | |
1092 | req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | | |
1093 | V_ULPTX_CMD(ULP_MEM_WRITE)); | |
1094 | req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | | |
1095 | V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); | |
1096 | } | |
1097 | ||
1098 | static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, | |
1099 | unsigned int idx, unsigned int npods, | |
1100 | struct cxgbi_gather_list *gl) | |
1101 | { | |
1102 | struct cxgbi_device *cdev = csk->cdev; | |
1103 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1104 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; | |
1105 | int i; | |
1106 | ||
1107 | log_debug(1 << CXGBI_DBG_DDP, | |
1108 | "csk 0x%p, idx %u, npods %u, gl 0x%p.\n", | |
1109 | csk, idx, npods, gl); | |
1110 | ||
1111 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { | |
b8ce8b59 | 1112 | struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + |
1113 | PPOD_SIZE, 0, GFP_ATOMIC); | |
6f7efaab | 1114 | |
b8ce8b59 | 1115 | if (!skb) |
1116 | return -ENOMEM; | |
6f7efaab | 1117 | |
1118 | ulp_mem_io_set_hdr(skb, pm_addr); | |
1119 | cxgbi_ddp_ppod_set((struct cxgbi_pagepod *)(skb->head + | |
1120 | sizeof(struct ulp_mem_io)), | |
1121 | hdr, gl, i * PPOD_PAGES_MAX); | |
1122 | skb->priority = CPL_PRIORITY_CONTROL; | |
1123 | cxgb3_ofld_send(cdev->lldev, skb); | |
1124 | } | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, | |
1129 | unsigned int idx, unsigned int npods) | |
1130 | { | |
1131 | struct cxgbi_device *cdev = chba->cdev; | |
1132 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1133 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; | |
1134 | int i; | |
1135 | ||
1136 | log_debug(1 << CXGBI_DBG_DDP, | |
1137 | "cdev 0x%p, idx %u, npods %u, tag 0x%x.\n", | |
1138 | cdev, idx, npods, tag); | |
1139 | ||
1140 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { | |
b8ce8b59 | 1141 | struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + |
1142 | PPOD_SIZE, 0, GFP_ATOMIC); | |
6f7efaab | 1143 | |
1144 | if (!skb) { | |
b8ce8b59 | 1145 | pr_err("tag 0x%x, 0x%x, %d/%u, skb OOM.\n", |
6f7efaab | 1146 | tag, idx, i, npods); |
1147 | continue; | |
1148 | } | |
6f7efaab | 1149 | ulp_mem_io_set_hdr(skb, pm_addr); |
1150 | skb->priority = CPL_PRIORITY_CONTROL; | |
1151 | cxgb3_ofld_send(cdev->lldev, skb); | |
1152 | } | |
1153 | } | |
1154 | ||
6f7efaab | 1155 | static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, |
1156 | unsigned int tid, int pg_idx, bool reply) | |
1157 | { | |
24d3f95a | 1158 | struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, |
6f7efaab | 1159 | GFP_KERNEL); |
1160 | struct cpl_set_tcb_field *req; | |
1161 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; | |
1162 | ||
1163 | log_debug(1 << CXGBI_DBG_DDP, | |
1164 | "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx); | |
1165 | if (!skb) | |
1166 | return -ENOMEM; | |
1167 | ||
1168 | /* set up ulp submode and page size */ | |
1169 | req = (struct cpl_set_tcb_field *)skb->head; | |
1170 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1171 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
1172 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
1173 | req->cpu_idx = 0; | |
1174 | req->word = htons(31); | |
1175 | req->mask = cpu_to_be64(0xF0000000); | |
1176 | req->val = cpu_to_be64(val << 28); | |
1177 | skb->priority = CPL_PRIORITY_CONTROL; | |
1178 | ||
1179 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * cxgb3i_setup_conn_digest - setup conn. digest setting | |
1185 | * @csk: cxgb tcp socket | |
1186 | * @tid: connection id | |
1187 | * @hcrc: header digest enabled | |
1188 | * @dcrc: data digest enabled | |
1189 | * @reply: request reply from h/w | |
1190 | * set up the iscsi digest settings for a connection identified by tid | |
1191 | */ | |
1192 | static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, | |
1193 | int hcrc, int dcrc, int reply) | |
1194 | { | |
24d3f95a | 1195 | struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, |
6f7efaab | 1196 | GFP_KERNEL); |
1197 | struct cpl_set_tcb_field *req; | |
1198 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); | |
1199 | ||
1200 | log_debug(1 << CXGBI_DBG_DDP, | |
1201 | "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc); | |
1202 | if (!skb) | |
1203 | return -ENOMEM; | |
1204 | ||
1205 | /* set up ulp submode and page size */ | |
1206 | req = (struct cpl_set_tcb_field *)skb->head; | |
1207 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1208 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
1209 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
1210 | req->cpu_idx = 0; | |
1211 | req->word = htons(31); | |
1212 | req->mask = cpu_to_be64(0x0F000000); | |
1213 | req->val = cpu_to_be64(val << 24); | |
1214 | skb->priority = CPL_PRIORITY_CONTROL; | |
1215 | ||
1216 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | /** | |
1221 | * t3_ddp_cleanup - release the cxgb3 adapter's ddp resource | |
1222 | * @cdev: cxgb3i adapter | |
1223 | * release all the resource held by the ddp pagepod manager for a given | |
1224 | * adapter if needed | |
1225 | */ | |
1226 | ||
1227 | static void t3_ddp_cleanup(struct cxgbi_device *cdev) | |
1228 | { | |
1229 | struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; | |
1230 | ||
1231 | if (cxgbi_ddp_cleanup(cdev)) { | |
1232 | pr_info("t3dev 0x%p, ulp_iscsi no more user.\n", tdev); | |
1233 | tdev->ulp_iscsi = NULL; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /** | |
1238 | * ddp_init - initialize the cxgb3 adapter's ddp resource | |
1239 | * @cdev: cxgb3i adapter | |
1240 | * initialize the ddp pagepod manager for a given adapter | |
1241 | */ | |
1242 | static int cxgb3i_ddp_init(struct cxgbi_device *cdev) | |
1243 | { | |
1244 | struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; | |
1245 | struct cxgbi_ddp_info *ddp = tdev->ulp_iscsi; | |
1246 | struct ulp_iscsi_info uinfo; | |
1247 | unsigned int pgsz_factor[4]; | |
1248 | int err; | |
1249 | ||
1250 | if (ddp) { | |
1251 | kref_get(&ddp->refcnt); | |
1252 | pr_warn("t3dev 0x%p, ddp 0x%p already set up.\n", | |
1253 | tdev, tdev->ulp_iscsi); | |
1254 | cdev->ddp = ddp; | |
1255 | return -EALREADY; | |
1256 | } | |
1257 | ||
1258 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); | |
1259 | if (err < 0) { | |
1260 | pr_err("%s, failed to get iscsi param err=%d.\n", | |
1261 | tdev->name, err); | |
1262 | return err; | |
1263 | } | |
1264 | ||
1265 | err = cxgbi_ddp_init(cdev, uinfo.llimit, uinfo.ulimit, | |
1266 | uinfo.max_txsz, uinfo.max_rxsz); | |
1267 | if (err < 0) | |
1268 | return err; | |
1269 | ||
1270 | ddp = cdev->ddp; | |
1271 | ||
1272 | uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; | |
1273 | cxgbi_ddp_page_size_factor(pgsz_factor); | |
1274 | uinfo.ulimit = uinfo.llimit + (ddp->nppods << PPOD_SIZE_SHIFT); | |
1275 | ||
1276 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); | |
1277 | if (err < 0) { | |
1278 | pr_warn("%s unable to set iscsi param err=%d, ddp disabled.\n", | |
1279 | tdev->name, err); | |
1280 | cxgbi_ddp_cleanup(cdev); | |
1281 | return err; | |
1282 | } | |
1283 | tdev->ulp_iscsi = ddp; | |
1284 | ||
6f7efaab | 1285 | cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; |
1286 | cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; | |
1287 | cdev->csk_ddp_set = ddp_set_map; | |
1288 | cdev->csk_ddp_clear = ddp_clear_map; | |
1289 | ||
1290 | pr_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " | |
1291 | "%u/%u.\n", | |
1292 | tdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, | |
1293 | ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, | |
1294 | ddp->max_rxsz, uinfo.max_rxsz); | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | static void cxgb3i_dev_close(struct t3cdev *t3dev) | |
1299 | { | |
1300 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); | |
1301 | ||
1302 | if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { | |
1303 | pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0); | |
1304 | return; | |
1305 | } | |
1306 | ||
1307 | cxgbi_device_unregister(cdev); | |
1308 | } | |
1309 | ||
1310 | /** | |
1311 | * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings | |
1312 | * @t3dev: t3cdev adapter | |
1313 | */ | |
1314 | static void cxgb3i_dev_open(struct t3cdev *t3dev) | |
1315 | { | |
1316 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); | |
1317 | struct adapter *adapter = tdev2adap(t3dev); | |
1318 | int i, err; | |
1319 | ||
1320 | if (cdev) { | |
1321 | pr_info("0x%p, updating.\n", cdev); | |
1322 | return; | |
1323 | } | |
1324 | ||
1325 | cdev = cxgbi_device_register(0, adapter->params.nports); | |
1326 | if (!cdev) { | |
1327 | pr_warn("device 0x%p register failed.\n", t3dev); | |
1328 | return; | |
1329 | } | |
1330 | ||
1331 | cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET; | |
1332 | cdev->lldev = t3dev; | |
1333 | cdev->pdev = adapter->pdev; | |
1334 | cdev->ports = adapter->port; | |
1335 | cdev->nports = adapter->params.nports; | |
1336 | cdev->mtus = adapter->params.mtus; | |
1337 | cdev->nmtus = NMTUS; | |
1338 | cdev->snd_win = cxgb3i_snd_win; | |
1339 | cdev->rcv_win = cxgb3i_rcv_win; | |
1340 | cdev->rx_credit_thres = cxgb3i_rx_credit_thres; | |
1341 | cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; | |
1342 | cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); | |
1343 | cdev->dev_ddp_cleanup = t3_ddp_cleanup; | |
1344 | cdev->itp = &cxgb3i_iscsi_transport; | |
1345 | ||
1346 | err = cxgb3i_ddp_init(cdev); | |
1347 | if (err) { | |
1348 | pr_info("0x%p ddp init failed\n", cdev); | |
1349 | goto err_out; | |
1350 | } | |
1351 | ||
1352 | err = cxgb3i_ofld_init(cdev); | |
1353 | if (err) { | |
1354 | pr_info("0x%p offload init failed\n", cdev); | |
1355 | goto err_out; | |
1356 | } | |
1357 | ||
1358 | err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, | |
1359 | &cxgb3i_host_template, cxgb3i_stt); | |
1360 | if (err) | |
1361 | goto err_out; | |
1362 | ||
1363 | for (i = 0; i < cdev->nports; i++) | |
1364 | cdev->hbas[i]->ipv4addr = | |
1365 | cxgb3i_get_private_ipv4addr(cdev->ports[i]); | |
1366 | ||
1367 | pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", | |
1368 | cdev, cdev ? cdev->flags : 0, t3dev, err); | |
1369 | return; | |
1370 | ||
1371 | err_out: | |
1372 | cxgbi_device_unregister(cdev); | |
1373 | } | |
1374 | ||
1375 | static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) | |
1376 | { | |
1377 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); | |
1378 | ||
1379 | log_debug(1 << CXGBI_DBG_TOE, | |
1380 | "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", | |
1381 | t3dev, cdev, event, port); | |
1382 | if (!cdev) | |
1383 | return; | |
1384 | ||
1385 | switch (event) { | |
1386 | case OFFLOAD_STATUS_DOWN: | |
1387 | cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; | |
1388 | break; | |
1389 | case OFFLOAD_STATUS_UP: | |
1390 | cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; | |
1391 | break; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | /** | |
1396 | * cxgb3i_init_module - module init entry point | |
1397 | * | |
1398 | * initialize any driver wide global data structures and register itself | |
1399 | * with the cxgb3 module | |
1400 | */ | |
1401 | static int __init cxgb3i_init_module(void) | |
1402 | { | |
1403 | int rc; | |
1404 | ||
1405 | printk(KERN_INFO "%s", version); | |
1406 | ||
1407 | rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt); | |
1408 | if (rc < 0) | |
1409 | return rc; | |
1410 | ||
1411 | cxgb3_register_client(&t3_client); | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * cxgb3i_exit_module - module cleanup/exit entry point | |
1417 | * | |
1418 | * go through the driver hba list and for each hba, release any resource held. | |
1419 | * and unregisters iscsi transport and the cxgb3 module | |
1420 | */ | |
1421 | static void __exit cxgb3i_exit_module(void) | |
1422 | { | |
1423 | cxgb3_unregister_client(&t3_client); | |
1424 | cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); | |
1425 | cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt); | |
1426 | } | |
1427 | ||
1428 | module_init(cxgb3i_init_module); | |
1429 | module_exit(cxgb3i_exit_module); |