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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, |
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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, |
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140 | .get_conn_param = iscsi_conn_get_param, |
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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 */ |
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155 | .get_ep_param = cxgbi_get_ep_param, |
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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); |
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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; |
988 | csk->l2t = t3_l2t_get(t3dev, dst->neighbour, ndev); |
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); |