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6f7efaab | 1 | /* |
2 | * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management | |
3 | * | |
1149a5ed | 4 | * Copyright (C) 2003-2015 Chelsio Communications. All rights reserved. |
6f7efaab | 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 | ||
6f7efaab | 17 | #include <linux/module.h> |
18 | #include <linux/moduleparam.h> | |
19 | #include <scsi/scsi_host.h> | |
20 | ||
21 | #include "common.h" | |
22 | #include "t3_cpl.h" | |
23 | #include "t3cdev.h" | |
24 | #include "cxgb3_defs.h" | |
25 | #include "cxgb3_ctl_defs.h" | |
26 | #include "cxgb3_offload.h" | |
27 | #include "firmware_exports.h" | |
28 | #include "cxgb3i.h" | |
29 | ||
30 | static unsigned int dbg_level; | |
31 | #include "../libcxgbi.h" | |
32 | ||
33 | #define DRV_MODULE_NAME "cxgb3i" | |
34 | #define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver" | |
0ea5bf3d KX |
35 | #define DRV_MODULE_VERSION "2.0.1-ko" |
36 | #define DRV_MODULE_RELDATE "Apr. 2015" | |
6f7efaab | 37 | |
38 | static char version[] = | |
39 | DRV_MODULE_DESC " " DRV_MODULE_NAME | |
40 | " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; | |
41 | ||
42 | MODULE_AUTHOR("Chelsio Communications, Inc."); | |
43 | MODULE_DESCRIPTION(DRV_MODULE_DESC); | |
44 | MODULE_VERSION(DRV_MODULE_VERSION); | |
45 | MODULE_LICENSE("GPL"); | |
46 | ||
47 | module_param(dbg_level, uint, 0644); | |
48 | MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); | |
49 | ||
50 | static int cxgb3i_rcv_win = 256 * 1024; | |
51 | module_param(cxgb3i_rcv_win, int, 0644); | |
52 | MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); | |
53 | ||
54 | static int cxgb3i_snd_win = 128 * 1024; | |
55 | module_param(cxgb3i_snd_win, int, 0644); | |
56 | MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); | |
57 | ||
58 | static int cxgb3i_rx_credit_thres = 10 * 1024; | |
59 | module_param(cxgb3i_rx_credit_thres, int, 0644); | |
856690ca | 60 | MODULE_PARM_DESC(cxgb3i_rx_credit_thres, |
6f7efaab | 61 | "RX credits return threshold in bytes (default=10KB)"); |
62 | ||
63 | static unsigned int cxgb3i_max_connect = 8 * 1024; | |
64 | module_param(cxgb3i_max_connect, uint, 0644); | |
65 | MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); | |
66 | ||
67 | static unsigned int cxgb3i_sport_base = 20000; | |
68 | module_param(cxgb3i_sport_base, uint, 0644); | |
69 | MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); | |
70 | ||
71 | static void cxgb3i_dev_open(struct t3cdev *); | |
72 | static void cxgb3i_dev_close(struct t3cdev *); | |
73 | static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); | |
74 | ||
75 | static struct cxgb3_client t3_client = { | |
76 | .name = DRV_MODULE_NAME, | |
77 | .handlers = cxgb3i_cpl_handlers, | |
78 | .add = cxgb3i_dev_open, | |
79 | .remove = cxgb3i_dev_close, | |
80 | .event_handler = cxgb3i_dev_event_handler, | |
81 | }; | |
82 | ||
83 | static struct scsi_host_template cxgb3i_host_template = { | |
84 | .module = THIS_MODULE, | |
85 | .name = DRV_MODULE_NAME, | |
86 | .proc_name = DRV_MODULE_NAME, | |
87 | .can_queue = CXGB3I_SCSI_HOST_QDEPTH, | |
88 | .queuecommand = iscsi_queuecommand, | |
db5ed4df | 89 | .change_queue_depth = scsi_change_queue_depth, |
6f7efaab | 90 | .sg_tablesize = SG_ALL, |
91 | .max_sectors = 0xFFFF, | |
92 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, | |
b6a05c82 | 93 | .eh_timed_out = iscsi_eh_cmd_timed_out, |
6f7efaab | 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, | |
c40ecc12 | 100 | .track_queue_depth = 1, |
6f7efaab | 101 | }; |
102 | ||
103 | static struct iscsi_transport cxgb3i_iscsi_transport = { | |
104 | .owner = THIS_MODULE, | |
105 | .name = DRV_MODULE_NAME, | |
106 | /* owner and name should be set already */ | |
107 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | |
108 | | CAP_DATADGST | CAP_DIGEST_OFFLOAD | | |
fdafd4df | 109 | CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, |
3128c6c7 | 110 | .attr_is_visible = cxgbi_attr_is_visible, |
6f7efaab | 111 | .get_host_param = cxgbi_get_host_param, |
112 | .set_host_param = cxgbi_set_host_param, | |
113 | /* session management */ | |
114 | .create_session = cxgbi_create_session, | |
115 | .destroy_session = cxgbi_destroy_session, | |
116 | .get_session_param = iscsi_session_get_param, | |
117 | /* connection management */ | |
118 | .create_conn = cxgbi_create_conn, | |
119 | .bind_conn = cxgbi_bind_conn, | |
120 | .destroy_conn = iscsi_tcp_conn_teardown, | |
121 | .start_conn = iscsi_conn_start, | |
122 | .stop_conn = iscsi_conn_stop, | |
c71b9b66 | 123 | .get_conn_param = iscsi_conn_get_param, |
6f7efaab | 124 | .set_param = cxgbi_set_conn_param, |
125 | .get_stats = cxgbi_get_conn_stats, | |
126 | /* pdu xmit req from user space */ | |
127 | .send_pdu = iscsi_conn_send_pdu, | |
128 | /* task */ | |
129 | .init_task = iscsi_tcp_task_init, | |
130 | .xmit_task = iscsi_tcp_task_xmit, | |
131 | .cleanup_task = cxgbi_cleanup_task, | |
132 | /* pdu */ | |
133 | .alloc_pdu = cxgbi_conn_alloc_pdu, | |
134 | .init_pdu = cxgbi_conn_init_pdu, | |
135 | .xmit_pdu = cxgbi_conn_xmit_pdu, | |
136 | .parse_pdu_itt = cxgbi_parse_pdu_itt, | |
137 | /* TCP connect/disconnect */ | |
c71b9b66 | 138 | .get_ep_param = cxgbi_get_ep_param, |
6f7efaab | 139 | .ep_connect = cxgbi_ep_connect, |
140 | .ep_poll = cxgbi_ep_poll, | |
141 | .ep_disconnect = cxgbi_ep_disconnect, | |
142 | /* Error recovery timeout call */ | |
143 | .session_recovery_timedout = iscsi_session_recovery_timedout, | |
144 | }; | |
145 | ||
146 | static struct scsi_transport_template *cxgb3i_stt; | |
147 | ||
148 | /* | |
149 | * CPL (Chelsio Protocol Language) defines a message passing interface between | |
150 | * the host driver and Chelsio asic. | |
151 | * The section below implments CPLs that related to iscsi tcp connection | |
152 | * open/close/abort and data send/receive. | |
153 | */ | |
154 | ||
155 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); | |
156 | ||
157 | static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, | |
158 | const struct l2t_entry *e) | |
159 | { | |
81daf10c | 160 | unsigned int wscale = cxgbi_sock_compute_wscale(csk->rcv_win); |
6f7efaab | 161 | struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; |
162 | ||
163 | skb->priority = CPL_PRIORITY_SETUP; | |
164 | ||
165 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
166 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); | |
167 | req->local_port = csk->saddr.sin_port; | |
168 | req->peer_port = csk->daddr.sin_port; | |
169 | req->local_ip = csk->saddr.sin_addr.s_addr; | |
170 | req->peer_ip = csk->daddr.sin_addr.s_addr; | |
171 | ||
172 | req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | | |
173 | V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | | |
174 | V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); | |
175 | req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | | |
81daf10c | 176 | V_RCV_BUFSIZ(csk->rcv_win >> 10)); |
6f7efaab | 177 | |
178 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
179 | "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", | |
180 | csk, csk->state, csk->flags, csk->atid, | |
181 | &req->local_ip, ntohs(req->local_port), | |
182 | &req->peer_ip, ntohs(req->peer_port), | |
183 | csk->mss_idx, e->idx, e->smt_idx); | |
184 | ||
185 | l2t_send(csk->cdev->lldev, skb, csk->l2t); | |
186 | } | |
187 | ||
188 | static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
189 | { | |
190 | cxgbi_sock_act_open_req_arp_failure(NULL, skb); | |
191 | } | |
192 | ||
193 | /* | |
194 | * CPL connection close request: host -> | |
195 | * | |
196 | * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to | |
197 | * the write queue (i.e., after any unsent txt data). | |
198 | */ | |
199 | static void send_close_req(struct cxgbi_sock *csk) | |
200 | { | |
201 | struct sk_buff *skb = csk->cpl_close; | |
202 | struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; | |
203 | unsigned int tid = csk->tid; | |
204 | ||
205 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
206 | "csk 0x%p,%u,0x%lx,%u.\n", | |
207 | csk, csk->state, csk->flags, csk->tid); | |
208 | ||
209 | csk->cpl_close = NULL; | |
210 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
211 | req->wr.wr_lo = htonl(V_WR_TID(tid)); | |
212 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); | |
213 | req->rsvd = htonl(csk->write_seq); | |
214 | ||
215 | cxgbi_sock_skb_entail(csk, skb); | |
216 | if (csk->state >= CTP_ESTABLISHED) | |
217 | push_tx_frames(csk, 1); | |
218 | } | |
219 | ||
220 | /* | |
221 | * CPL connection abort request: host -> | |
222 | * | |
223 | * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs | |
224 | * for the same connection and also that we do not try to send a message | |
225 | * after the connection has closed. | |
226 | */ | |
227 | static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) | |
228 | { | |
229 | struct cpl_abort_req *req = cplhdr(skb); | |
230 | ||
231 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
232 | "t3dev 0x%p, tid %u, skb 0x%p.\n", | |
233 | tdev, GET_TID(req), skb); | |
234 | req->cmd = CPL_ABORT_NO_RST; | |
235 | cxgb3_ofld_send(tdev, skb); | |
236 | } | |
237 | ||
238 | static void send_abort_req(struct cxgbi_sock *csk) | |
239 | { | |
240 | struct sk_buff *skb = csk->cpl_abort_req; | |
241 | struct cpl_abort_req *req; | |
242 | ||
243 | if (unlikely(csk->state == CTP_ABORTING || !skb)) | |
244 | return; | |
245 | cxgbi_sock_set_state(csk, CTP_ABORTING); | |
246 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); | |
247 | /* Purge the send queue so we don't send anything after an abort. */ | |
248 | cxgbi_sock_purge_write_queue(csk); | |
249 | ||
250 | csk->cpl_abort_req = NULL; | |
251 | req = (struct cpl_abort_req *)skb->head; | |
252 | skb->priority = CPL_PRIORITY_DATA; | |
253 | set_arp_failure_handler(skb, abort_arp_failure); | |
254 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); | |
255 | req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); | |
256 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); | |
257 | req->rsvd0 = htonl(csk->snd_nxt); | |
258 | req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); | |
259 | req->cmd = CPL_ABORT_SEND_RST; | |
260 | ||
261 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
262 | "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", | |
263 | csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, | |
264 | req->rsvd1); | |
265 | ||
266 | l2t_send(csk->cdev->lldev, skb, csk->l2t); | |
267 | } | |
268 | ||
269 | /* | |
270 | * CPL connection abort reply: host -> | |
271 | * | |
272 | * Send an ABORT_RPL message in response of the ABORT_REQ received. | |
273 | */ | |
274 | static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) | |
275 | { | |
276 | struct sk_buff *skb = csk->cpl_abort_rpl; | |
277 | struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; | |
278 | ||
279 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
280 | "csk 0x%p,%u,0x%lx,%u, status %d.\n", | |
281 | csk, csk->state, csk->flags, csk->tid, rst_status); | |
282 | ||
283 | csk->cpl_abort_rpl = NULL; | |
284 | skb->priority = CPL_PRIORITY_DATA; | |
285 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
286 | rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); | |
287 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); | |
288 | rpl->cmd = rst_status; | |
289 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
290 | } | |
291 | ||
292 | /* | |
293 | * CPL connection rx data ack: host -> | |
294 | * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of | |
295 | * credits sent. | |
296 | */ | |
297 | static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) | |
298 | { | |
299 | struct sk_buff *skb; | |
300 | struct cpl_rx_data_ack *req; | |
301 | u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); | |
302 | ||
303 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
304 | "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n", | |
305 | csk, csk->state, csk->flags, csk->tid, credits, dack); | |
306 | ||
24d3f95a | 307 | skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); |
6f7efaab | 308 | if (!skb) { |
309 | pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); | |
310 | return 0; | |
311 | } | |
312 | req = (struct cpl_rx_data_ack *)skb->head; | |
313 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
314 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); | |
315 | req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | | |
316 | V_RX_CREDITS(credits)); | |
317 | skb->priority = CPL_PRIORITY_ACK; | |
318 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
319 | return credits; | |
320 | } | |
321 | ||
322 | /* | |
323 | * CPL connection tx data: host -> | |
324 | * | |
325 | * Send iscsi PDU via TX_DATA CPL message. Returns the number of | |
326 | * credits sent. | |
327 | * Each TX_DATA consumes work request credit (wrs), so we need to keep track of | |
328 | * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). | |
329 | */ | |
330 | ||
331 | static unsigned int wrlen __read_mostly; | |
332 | static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; | |
333 | ||
334 | static void init_wr_tab(unsigned int wr_len) | |
335 | { | |
336 | int i; | |
337 | ||
338 | if (skb_wrs[1]) /* already initialized */ | |
339 | return; | |
340 | for (i = 1; i < SKB_WR_LIST_SIZE; i++) { | |
341 | int sgl_len = (3 * i) / 2 + (i & 1); | |
342 | ||
343 | sgl_len += 3; | |
344 | skb_wrs[i] = (sgl_len <= wr_len | |
345 | ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); | |
346 | } | |
347 | wrlen = wr_len * 8; | |
348 | } | |
349 | ||
350 | static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, | |
351 | int len, int req_completion) | |
352 | { | |
353 | struct tx_data_wr *req; | |
354 | struct l2t_entry *l2t = csk->l2t; | |
355 | ||
356 | skb_reset_transport_header(skb); | |
357 | req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req)); | |
358 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | | |
359 | (req_completion ? F_WR_COMPL : 0)); | |
360 | req->wr_lo = htonl(V_WR_TID(csk->tid)); | |
361 | /* len includes the length of any HW ULP additions */ | |
362 | req->len = htonl(len); | |
363 | /* V_TX_ULP_SUBMODE sets both the mode and submode */ | |
364 | req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) | | |
365 | V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); | |
366 | req->sndseq = htonl(csk->snd_nxt); | |
367 | req->param = htonl(V_TX_PORT(l2t->smt_idx)); | |
368 | ||
369 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { | |
370 | req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | | |
371 | V_TX_CPU_IDX(csk->rss_qid)); | |
372 | /* sendbuffer is in units of 32KB. */ | |
81daf10c | 373 | req->param |= htonl(V_TX_SNDBUF(csk->snd_win >> 15)); |
6f7efaab | 374 | cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); |
375 | } | |
376 | } | |
377 | ||
378 | /** | |
379 | * push_tx_frames -- start transmit | |
380 | * @c3cn: the offloaded connection | |
381 | * @req_completion: request wr_ack or not | |
382 | * | |
383 | * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a | |
384 | * connection's send queue and sends them on to T3. Must be called with the | |
385 | * connection's lock held. Returns the amount of send buffer space that was | |
386 | * freed as a result of sending queued data to T3. | |
387 | */ | |
388 | ||
389 | static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) | |
390 | { | |
391 | kfree_skb(skb); | |
392 | } | |
393 | ||
394 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) | |
395 | { | |
396 | int total_size = 0; | |
397 | struct sk_buff *skb; | |
398 | ||
399 | if (unlikely(csk->state < CTP_ESTABLISHED || | |
400 | csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { | |
401 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
402 | "csk 0x%p,%u,0x%lx,%u, in closing state.\n", | |
403 | csk, csk->state, csk->flags, csk->tid); | |
404 | return 0; | |
405 | } | |
406 | ||
407 | while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { | |
408 | int len = skb->len; /* length before skb_push */ | |
409 | int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); | |
410 | int wrs_needed = skb_wrs[frags]; | |
411 | ||
412 | if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) | |
413 | wrs_needed = 1; | |
414 | ||
415 | WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); | |
416 | ||
417 | if (csk->wr_cred < wrs_needed) { | |
418 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
419 | "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n", | |
420 | csk, skb->len, skb->data_len, frags, | |
421 | wrs_needed, csk->wr_cred); | |
422 | break; | |
423 | } | |
424 | ||
425 | __skb_unlink(skb, &csk->write_queue); | |
426 | skb->priority = CPL_PRIORITY_DATA; | |
427 | skb->csum = wrs_needed; /* remember this until the WR_ACK */ | |
428 | csk->wr_cred -= wrs_needed; | |
429 | csk->wr_una_cred += wrs_needed; | |
430 | cxgbi_sock_enqueue_wr(csk, skb); | |
431 | ||
432 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
433 | "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, " | |
434 | "left %u, unack %u.\n", | |
435 | csk, skb->len, skb->data_len, frags, skb->csum, | |
436 | csk->wr_cred, csk->wr_una_cred); | |
437 | ||
438 | if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { | |
439 | if ((req_completion && | |
440 | csk->wr_una_cred == wrs_needed) || | |
441 | csk->wr_una_cred >= csk->wr_max_cred / 2) { | |
442 | req_completion = 1; | |
443 | csk->wr_una_cred = 0; | |
444 | } | |
445 | len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); | |
446 | make_tx_data_wr(csk, skb, len, req_completion); | |
447 | csk->snd_nxt += len; | |
448 | cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); | |
449 | } | |
450 | total_size += skb->truesize; | |
451 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
452 | "csk 0x%p, tid 0x%x, send skb 0x%p.\n", | |
453 | csk, csk->tid, skb); | |
454 | set_arp_failure_handler(skb, arp_failure_skb_discard); | |
455 | l2t_send(csk->cdev->lldev, skb, csk->l2t); | |
456 | } | |
457 | return total_size; | |
458 | } | |
459 | ||
460 | /* | |
461 | * Process a CPL_ACT_ESTABLISH message: -> host | |
462 | * Updates connection state from an active establish CPL message. Runs with | |
463 | * the connection lock held. | |
464 | */ | |
465 | ||
466 | static inline void free_atid(struct cxgbi_sock *csk) | |
467 | { | |
468 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { | |
469 | cxgb3_free_atid(csk->cdev->lldev, csk->atid); | |
470 | cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); | |
471 | cxgbi_sock_put(csk); | |
472 | } | |
473 | } | |
474 | ||
475 | static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
476 | { | |
477 | struct cxgbi_sock *csk = ctx; | |
478 | struct cpl_act_establish *req = cplhdr(skb); | |
479 | unsigned int tid = GET_TID(req); | |
480 | unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); | |
481 | u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ | |
482 | ||
483 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
484 | "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", | |
485 | atid, atid, csk, csk->state, csk->flags, rcv_isn); | |
486 | ||
487 | cxgbi_sock_get(csk); | |
488 | cxgbi_sock_set_flag(csk, CTPF_HAS_TID); | |
489 | csk->tid = tid; | |
490 | cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid); | |
491 | ||
492 | free_atid(csk); | |
493 | ||
494 | csk->rss_qid = G_QNUM(ntohs(skb->csum)); | |
495 | ||
496 | spin_lock_bh(&csk->lock); | |
497 | if (csk->retry_timer.function) { | |
498 | del_timer(&csk->retry_timer); | |
499 | csk->retry_timer.function = NULL; | |
500 | } | |
501 | ||
502 | if (unlikely(csk->state != CTP_ACTIVE_OPEN)) | |
503 | pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", | |
504 | csk, csk->state, csk->flags, csk->tid); | |
505 | ||
506 | csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; | |
81daf10c KX |
507 | if (csk->rcv_win > (M_RCV_BUFSIZ << 10)) |
508 | csk->rcv_wup -= csk->rcv_win - (M_RCV_BUFSIZ << 10); | |
6f7efaab | 509 | |
510 | cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); | |
511 | ||
512 | if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) | |
513 | /* upper layer has requested closing */ | |
514 | send_abort_req(csk); | |
515 | else { | |
516 | if (skb_queue_len(&csk->write_queue)) | |
517 | push_tx_frames(csk, 1); | |
518 | cxgbi_conn_tx_open(csk); | |
519 | } | |
520 | ||
521 | spin_unlock_bh(&csk->lock); | |
522 | __kfree_skb(skb); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /* | |
527 | * Process a CPL_ACT_OPEN_RPL message: -> host | |
528 | * Handle active open failures. | |
529 | */ | |
530 | static int act_open_rpl_status_to_errno(int status) | |
531 | { | |
532 | switch (status) { | |
533 | case CPL_ERR_CONN_RESET: | |
534 | return -ECONNREFUSED; | |
535 | case CPL_ERR_ARP_MISS: | |
536 | return -EHOSTUNREACH; | |
537 | case CPL_ERR_CONN_TIMEDOUT: | |
538 | return -ETIMEDOUT; | |
539 | case CPL_ERR_TCAM_FULL: | |
540 | return -ENOMEM; | |
541 | case CPL_ERR_CONN_EXIST: | |
542 | return -EADDRINUSE; | |
543 | default: | |
544 | return -EIO; | |
545 | } | |
546 | } | |
547 | ||
548 | static void act_open_retry_timer(unsigned long data) | |
549 | { | |
550 | struct sk_buff *skb; | |
551 | struct cxgbi_sock *csk = (struct cxgbi_sock *)data; | |
552 | ||
553 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
554 | "csk 0x%p,%u,0x%lx,%u.\n", | |
555 | csk, csk->state, csk->flags, csk->tid); | |
556 | ||
557 | cxgbi_sock_get(csk); | |
558 | spin_lock_bh(&csk->lock); | |
24d3f95a | 559 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); |
6f7efaab | 560 | if (!skb) |
561 | cxgbi_sock_fail_act_open(csk, -ENOMEM); | |
562 | else { | |
563 | skb->sk = (struct sock *)csk; | |
564 | set_arp_failure_handler(skb, act_open_arp_failure); | |
565 | send_act_open_req(csk, skb, csk->l2t); | |
566 | } | |
567 | spin_unlock_bh(&csk->lock); | |
568 | cxgbi_sock_put(csk); | |
569 | } | |
570 | ||
571 | static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
572 | { | |
573 | struct cxgbi_sock *csk = ctx; | |
574 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
575 | ||
0b3d8947 | 576 | pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n", |
577 | csk, csk->state, csk->flags, csk->atid, rpl->status, | |
578 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), | |
579 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); | |
6f7efaab | 580 | |
581 | if (rpl->status != CPL_ERR_TCAM_FULL && | |
582 | rpl->status != CPL_ERR_CONN_EXIST && | |
583 | rpl->status != CPL_ERR_ARP_MISS) | |
584 | cxgb3_queue_tid_release(tdev, GET_TID(rpl)); | |
585 | ||
586 | cxgbi_sock_get(csk); | |
587 | spin_lock_bh(&csk->lock); | |
588 | if (rpl->status == CPL_ERR_CONN_EXIST && | |
589 | csk->retry_timer.function != act_open_retry_timer) { | |
590 | csk->retry_timer.function = act_open_retry_timer; | |
591 | mod_timer(&csk->retry_timer, jiffies + HZ / 2); | |
592 | } else | |
593 | cxgbi_sock_fail_act_open(csk, | |
594 | act_open_rpl_status_to_errno(rpl->status)); | |
595 | ||
596 | spin_unlock_bh(&csk->lock); | |
597 | cxgbi_sock_put(csk); | |
598 | __kfree_skb(skb); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | /* | |
603 | * Process PEER_CLOSE CPL messages: -> host | |
604 | * Handle peer FIN. | |
605 | */ | |
606 | static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
607 | { | |
608 | struct cxgbi_sock *csk = ctx; | |
609 | ||
610 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
611 | "csk 0x%p,%u,0x%lx,%u.\n", | |
612 | csk, csk->state, csk->flags, csk->tid); | |
613 | ||
614 | cxgbi_sock_rcv_peer_close(csk); | |
615 | __kfree_skb(skb); | |
616 | return 0; | |
617 | } | |
618 | ||
619 | /* | |
620 | * Process CLOSE_CONN_RPL CPL message: -> host | |
621 | * Process a peer ACK to our FIN. | |
622 | */ | |
623 | static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, | |
624 | void *ctx) | |
625 | { | |
626 | struct cxgbi_sock *csk = ctx; | |
627 | struct cpl_close_con_rpl *rpl = cplhdr(skb); | |
628 | ||
629 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
630 | "csk 0x%p,%u,0x%lx,%u, snxt %u.\n", | |
631 | csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt)); | |
632 | ||
633 | cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); | |
634 | __kfree_skb(skb); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Process ABORT_REQ_RSS CPL message: -> host | |
640 | * Process abort requests. If we are waiting for an ABORT_RPL we ignore this | |
641 | * request except that we need to reply to it. | |
642 | */ | |
643 | ||
644 | static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, | |
645 | int *need_rst) | |
646 | { | |
647 | switch (abort_reason) { | |
648 | case CPL_ERR_BAD_SYN: /* fall through */ | |
649 | case CPL_ERR_CONN_RESET: | |
0b3d8947 | 650 | return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET; |
6f7efaab | 651 | case CPL_ERR_XMIT_TIMEDOUT: |
652 | case CPL_ERR_PERSIST_TIMEDOUT: | |
653 | case CPL_ERR_FINWAIT2_TIMEDOUT: | |
654 | case CPL_ERR_KEEPALIVE_TIMEDOUT: | |
655 | return -ETIMEDOUT; | |
656 | default: | |
657 | return -EIO; | |
658 | } | |
659 | } | |
660 | ||
661 | static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
662 | { | |
663 | const struct cpl_abort_req_rss *req = cplhdr(skb); | |
664 | struct cxgbi_sock *csk = ctx; | |
665 | int rst_status = CPL_ABORT_NO_RST; | |
666 | ||
667 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
668 | "csk 0x%p,%u,0x%lx,%u.\n", | |
669 | csk, csk->state, csk->flags, csk->tid); | |
670 | ||
671 | if (req->status == CPL_ERR_RTX_NEG_ADVICE || | |
672 | req->status == CPL_ERR_PERSIST_NEG_ADVICE) { | |
673 | goto done; | |
674 | } | |
675 | ||
676 | cxgbi_sock_get(csk); | |
677 | spin_lock_bh(&csk->lock); | |
678 | ||
679 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { | |
680 | cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); | |
681 | cxgbi_sock_set_state(csk, CTP_ABORTING); | |
682 | goto out; | |
683 | } | |
684 | ||
685 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); | |
686 | send_abort_rpl(csk, rst_status); | |
687 | ||
688 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { | |
689 | csk->err = abort_status_to_errno(csk, req->status, &rst_status); | |
690 | cxgbi_sock_closed(csk); | |
691 | } | |
692 | ||
693 | out: | |
694 | spin_unlock_bh(&csk->lock); | |
695 | cxgbi_sock_put(csk); | |
696 | done: | |
697 | __kfree_skb(skb); | |
698 | return 0; | |
699 | } | |
700 | ||
701 | /* | |
702 | * Process ABORT_RPL_RSS CPL message: -> host | |
703 | * Process abort replies. We only process these messages if we anticipate | |
704 | * them as the coordination between SW and HW in this area is somewhat lacking | |
705 | * and sometimes we get ABORT_RPLs after we are done with the connection that | |
706 | * originated the ABORT_REQ. | |
707 | */ | |
708 | static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
709 | { | |
710 | struct cpl_abort_rpl_rss *rpl = cplhdr(skb); | |
711 | struct cxgbi_sock *csk = ctx; | |
712 | ||
713 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
714 | "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", | |
715 | rpl->status, csk, csk ? csk->state : 0, | |
716 | csk ? csk->flags : 0UL); | |
717 | /* | |
718 | * Ignore replies to post-close aborts indicating that the abort was | |
719 | * requested too late. These connections are terminated when we get | |
720 | * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss | |
721 | * arrives the TID is either no longer used or it has been recycled. | |
722 | */ | |
723 | if (rpl->status == CPL_ERR_ABORT_FAILED) | |
724 | goto rel_skb; | |
725 | /* | |
726 | * Sometimes we've already closed the connection, e.g., a post-close | |
727 | * abort races with ABORT_REQ_RSS, the latter frees the connection | |
728 | * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, | |
729 | * but FW turns the ABORT_REQ into a regular one and so we get | |
730 | * ABORT_RPL_RSS with status 0 and no connection. | |
731 | */ | |
732 | if (csk) | |
733 | cxgbi_sock_rcv_abort_rpl(csk); | |
734 | rel_skb: | |
735 | __kfree_skb(skb); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Process RX_ISCSI_HDR CPL message: -> host | |
741 | * Handle received PDUs, the payload could be DDP'ed. If not, the payload | |
742 | * follow after the bhs. | |
743 | */ | |
744 | static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) | |
745 | { | |
746 | struct cxgbi_sock *csk = ctx; | |
747 | struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); | |
748 | struct cpl_iscsi_hdr_norss data_cpl; | |
749 | struct cpl_rx_data_ddp_norss ddp_cpl; | |
750 | unsigned int hdr_len, data_len, status; | |
751 | unsigned int len; | |
752 | int err; | |
753 | ||
754 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
755 | "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n", | |
756 | csk, csk->state, csk->flags, csk->tid, skb, skb->len); | |
757 | ||
758 | spin_lock_bh(&csk->lock); | |
759 | ||
760 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { | |
761 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
762 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
763 | csk, csk->state, csk->flags, csk->tid); | |
764 | if (csk->state != CTP_ABORTING) | |
765 | goto abort_conn; | |
766 | else | |
767 | goto discard; | |
768 | } | |
769 | ||
770 | cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq); | |
771 | cxgbi_skcb_flags(skb) = 0; | |
772 | ||
773 | skb_reset_transport_header(skb); | |
774 | __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); | |
775 | ||
776 | len = hdr_len = ntohs(hdr_cpl->len); | |
777 | /* msg coalesce is off or not enough data received */ | |
778 | if (skb->len <= hdr_len) { | |
779 | pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n", | |
780 | csk->cdev->ports[csk->port_id]->name, csk->tid, | |
781 | skb->len, hdr_len); | |
782 | goto abort_conn; | |
783 | } | |
784 | cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED); | |
785 | ||
786 | err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, | |
787 | sizeof(ddp_cpl)); | |
788 | if (err < 0) { | |
789 | pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n", | |
790 | csk->cdev->ports[csk->port_id]->name, csk->tid, | |
791 | skb->len, sizeof(ddp_cpl), err); | |
792 | goto abort_conn; | |
793 | } | |
794 | ||
795 | cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); | |
796 | cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len); | |
797 | cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); | |
798 | status = ntohl(ddp_cpl.ddp_status); | |
799 | ||
800 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
801 | "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n", | |
802 | csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status); | |
803 | ||
804 | if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) | |
805 | cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); | |
806 | if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) | |
807 | cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); | |
808 | if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) | |
809 | cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); | |
810 | ||
811 | if (skb->len > (hdr_len + sizeof(ddp_cpl))) { | |
812 | err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); | |
813 | if (err < 0) { | |
814 | pr_err("%s: tid %u, cp %zu/%u failed %d.\n", | |
815 | csk->cdev->ports[csk->port_id]->name, | |
816 | csk->tid, sizeof(data_cpl), skb->len, err); | |
817 | goto abort_conn; | |
818 | } | |
819 | data_len = ntohs(data_cpl.len); | |
820 | log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX, | |
821 | "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n", | |
822 | skb, data_len, cxgbi_skcb_rx_pdulen(skb), status); | |
823 | len += sizeof(data_cpl) + data_len; | |
824 | } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) | |
825 | cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); | |
826 | ||
827 | csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb); | |
828 | __pskb_trim(skb, len); | |
829 | __skb_queue_tail(&csk->receive_queue, skb); | |
830 | cxgbi_conn_pdu_ready(csk); | |
831 | ||
832 | spin_unlock_bh(&csk->lock); | |
833 | return 0; | |
834 | ||
835 | abort_conn: | |
836 | send_abort_req(csk); | |
837 | discard: | |
838 | spin_unlock_bh(&csk->lock); | |
839 | __kfree_skb(skb); | |
840 | return 0; | |
841 | } | |
842 | ||
843 | /* | |
844 | * Process TX_DATA_ACK CPL messages: -> host | |
845 | * Process an acknowledgment of WR completion. Advance snd_una and send the | |
846 | * next batch of work requests from the write queue. | |
847 | */ | |
848 | static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) | |
849 | { | |
850 | struct cxgbi_sock *csk = ctx; | |
851 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
852 | ||
853 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
854 | "csk 0x%p,%u,0x%lx,%u, cr %u.\n", | |
855 | csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits)); | |
856 | ||
857 | cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1); | |
858 | __kfree_skb(skb); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* | |
863 | * for each connection, pre-allocate skbs needed for close/abort requests. So | |
864 | * that we can service the request right away. | |
865 | */ | |
866 | static int alloc_cpls(struct cxgbi_sock *csk) | |
867 | { | |
24d3f95a | 868 | csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0, |
6f7efaab | 869 | GFP_KERNEL); |
870 | if (!csk->cpl_close) | |
871 | return -ENOMEM; | |
24d3f95a | 872 | csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0, |
6f7efaab | 873 | GFP_KERNEL); |
874 | if (!csk->cpl_abort_req) | |
875 | goto free_cpl_skbs; | |
876 | ||
24d3f95a | 877 | csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0, |
6f7efaab | 878 | GFP_KERNEL); |
879 | if (!csk->cpl_abort_rpl) | |
880 | goto free_cpl_skbs; | |
881 | ||
882 | return 0; | |
883 | ||
884 | free_cpl_skbs: | |
885 | cxgbi_sock_free_cpl_skbs(csk); | |
886 | return -ENOMEM; | |
887 | } | |
888 | ||
889 | /** | |
890 | * release_offload_resources - release offload resource | |
891 | * @c3cn: the offloaded iscsi tcp connection. | |
892 | * Release resources held by an offload connection (TID, L2T entry, etc.) | |
893 | */ | |
894 | static void l2t_put(struct cxgbi_sock *csk) | |
895 | { | |
896 | struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; | |
897 | ||
898 | if (csk->l2t) { | |
e48f129c | 899 | l2t_release(t3dev, csk->l2t); |
6f7efaab | 900 | csk->l2t = NULL; |
901 | cxgbi_sock_put(csk); | |
902 | } | |
903 | } | |
904 | ||
905 | static void release_offload_resources(struct cxgbi_sock *csk) | |
906 | { | |
907 | struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; | |
908 | ||
909 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
910 | "csk 0x%p,%u,0x%lx,%u.\n", | |
911 | csk, csk->state, csk->flags, csk->tid); | |
912 | ||
913 | csk->rss_qid = 0; | |
914 | cxgbi_sock_free_cpl_skbs(csk); | |
915 | ||
916 | if (csk->wr_cred != csk->wr_max_cred) { | |
917 | cxgbi_sock_purge_wr_queue(csk); | |
918 | cxgbi_sock_reset_wr_list(csk); | |
919 | } | |
920 | l2t_put(csk); | |
921 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) | |
922 | free_atid(csk); | |
923 | else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { | |
924 | cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); | |
925 | cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); | |
926 | cxgbi_sock_put(csk); | |
927 | } | |
928 | csk->dst = NULL; | |
929 | csk->cdev = NULL; | |
930 | } | |
931 | ||
0b3d8947 | 932 | static void update_address(struct cxgbi_hba *chba) |
933 | { | |
934 | if (chba->ipv4addr) { | |
935 | if (chba->vdev && | |
936 | chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) { | |
937 | cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr); | |
938 | cxgb3i_set_private_ipv4addr(chba->ndev, 0); | |
939 | pr_info("%s set %pI4.\n", | |
940 | chba->vdev->name, &chba->ipv4addr); | |
941 | } else if (chba->ipv4addr != | |
942 | cxgb3i_get_private_ipv4addr(chba->ndev)) { | |
943 | cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr); | |
944 | pr_info("%s set %pI4.\n", | |
945 | chba->ndev->name, &chba->ipv4addr); | |
946 | } | |
947 | } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) { | |
948 | if (chba->vdev) | |
949 | cxgb3i_set_private_ipv4addr(chba->vdev, 0); | |
950 | cxgb3i_set_private_ipv4addr(chba->ndev, 0); | |
951 | } | |
952 | } | |
953 | ||
6f7efaab | 954 | static int init_act_open(struct cxgbi_sock *csk) |
955 | { | |
956 | struct dst_entry *dst = csk->dst; | |
957 | struct cxgbi_device *cdev = csk->cdev; | |
958 | struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; | |
959 | struct net_device *ndev = cdev->ports[csk->port_id]; | |
0b3d8947 | 960 | struct cxgbi_hba *chba = cdev->hbas[csk->port_id]; |
6f7efaab | 961 | struct sk_buff *skb = NULL; |
962 | ||
963 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
964 | "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags); | |
965 | ||
0b3d8947 | 966 | update_address(chba); |
967 | if (chba->ipv4addr) | |
968 | csk->saddr.sin_addr.s_addr = chba->ipv4addr; | |
969 | ||
6f7efaab | 970 | csk->rss_qid = 0; |
534cb283 DM |
971 | csk->l2t = t3_l2t_get(t3dev, dst, ndev, |
972 | &csk->daddr.sin_addr.s_addr); | |
6f7efaab | 973 | if (!csk->l2t) { |
974 | pr_err("NO l2t available.\n"); | |
975 | return -EINVAL; | |
976 | } | |
977 | cxgbi_sock_get(csk); | |
978 | ||
979 | csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); | |
980 | if (csk->atid < 0) { | |
981 | pr_err("NO atid available.\n"); | |
982 | goto rel_resource; | |
983 | } | |
984 | cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); | |
985 | cxgbi_sock_get(csk); | |
986 | ||
24d3f95a | 987 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); |
6f7efaab | 988 | if (!skb) |
989 | goto rel_resource; | |
990 | skb->sk = (struct sock *)csk; | |
991 | set_arp_failure_handler(skb, act_open_arp_failure); | |
81daf10c KX |
992 | csk->snd_win = cxgb3i_snd_win; |
993 | csk->rcv_win = cxgb3i_rcv_win; | |
6f7efaab | 994 | |
995 | csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; | |
996 | csk->wr_una_cred = 0; | |
997 | csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); | |
998 | cxgbi_sock_reset_wr_list(csk); | |
999 | csk->err = 0; | |
1000 | ||
0b3d8947 | 1001 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1002 | "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n", | |
1003 | csk, csk->state, csk->flags, | |
1004 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), | |
1005 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); | |
1006 | ||
6f7efaab | 1007 | cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); |
1008 | send_act_open_req(csk, skb, csk->l2t); | |
1009 | return 0; | |
1010 | ||
1011 | rel_resource: | |
1012 | if (skb) | |
1013 | __kfree_skb(skb); | |
1014 | return -EINVAL; | |
1015 | } | |
1016 | ||
1017 | cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { | |
1018 | [CPL_ACT_ESTABLISH] = do_act_establish, | |
1019 | [CPL_ACT_OPEN_RPL] = do_act_open_rpl, | |
1020 | [CPL_PEER_CLOSE] = do_peer_close, | |
1021 | [CPL_ABORT_REQ_RSS] = do_abort_req, | |
1022 | [CPL_ABORT_RPL_RSS] = do_abort_rpl, | |
1023 | [CPL_CLOSE_CON_RPL] = do_close_con_rpl, | |
1024 | [CPL_TX_DMA_ACK] = do_wr_ack, | |
1025 | [CPL_ISCSI_HDR] = do_iscsi_hdr, | |
1026 | }; | |
1027 | ||
1028 | /** | |
1029 | * cxgb3i_ofld_init - allocate and initialize resources for each adapter found | |
1030 | * @cdev: cxgbi adapter | |
1031 | */ | |
4665bdd5 | 1032 | static int cxgb3i_ofld_init(struct cxgbi_device *cdev) |
6f7efaab | 1033 | { |
1034 | struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; | |
1035 | struct adap_ports port; | |
1036 | struct ofld_page_info rx_page_info; | |
1037 | unsigned int wr_len; | |
1038 | int rc; | |
1039 | ||
1040 | if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || | |
1041 | t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || | |
1042 | t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { | |
1043 | pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev); | |
1044 | return -EINVAL; | |
1045 | } | |
1046 | ||
1047 | if (cxgb3i_max_connect > CXGBI_MAX_CONN) | |
1048 | cxgb3i_max_connect = CXGBI_MAX_CONN; | |
1049 | ||
1050 | rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, | |
1051 | cxgb3i_max_connect); | |
1052 | if (rc < 0) | |
1053 | return rc; | |
1054 | ||
1055 | init_wr_tab(wr_len); | |
1056 | cdev->csk_release_offload_resources = release_offload_resources; | |
1057 | cdev->csk_push_tx_frames = push_tx_frames; | |
1058 | cdev->csk_send_abort_req = send_abort_req; | |
1059 | cdev->csk_send_close_req = send_close_req; | |
1060 | cdev->csk_send_rx_credits = send_rx_credits; | |
1061 | cdev->csk_alloc_cpls = alloc_cpls; | |
1062 | cdev->csk_init_act_open = init_act_open; | |
1063 | ||
1064 | pr_info("cdev 0x%p, offload up, added.\n", cdev); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * functions to program the pagepod in h/w | |
1070 | */ | |
1071 | static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) | |
1072 | { | |
1073 | struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; | |
1074 | ||
1075 | memset(req, 0, sizeof(*req)); | |
1076 | ||
1077 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); | |
1078 | req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | | |
1079 | V_ULPTX_CMD(ULP_MEM_WRITE)); | |
b75113b1 VP |
1080 | req->len = htonl(V_ULP_MEMIO_DATA_LEN(IPPOD_SIZE >> 5) | |
1081 | V_ULPTX_NFLITS((IPPOD_SIZE >> 3) + 1)); | |
1082 | } | |
1083 | ||
1084 | static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) | |
1085 | { | |
1086 | return ((struct t3cdev *)cdev->lldev)->ulp_iscsi; | |
1087 | } | |
1088 | ||
1089 | static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, | |
1090 | struct cxgbi_task_tag_info *ttinfo) | |
1091 | { | |
1092 | unsigned int idx = ttinfo->idx; | |
1093 | unsigned int npods = ttinfo->npods; | |
1094 | struct scatterlist *sg = ttinfo->sgl; | |
1095 | struct cxgbi_pagepod *ppod; | |
1096 | struct ulp_mem_io *req; | |
1097 | unsigned int sg_off; | |
1098 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; | |
1099 | int i; | |
1100 | ||
1101 | for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) { | |
1102 | struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + | |
1103 | IPPOD_SIZE, 0, GFP_ATOMIC); | |
1104 | ||
1105 | if (!skb) | |
1106 | return -ENOMEM; | |
1107 | ulp_mem_io_set_hdr(skb, pm_addr); | |
1108 | req = (struct ulp_mem_io *)skb->head; | |
1109 | ppod = (struct cxgbi_pagepod *)(req + 1); | |
1110 | sg_off = i * PPOD_PAGES_MAX; | |
1111 | cxgbi_ddp_set_one_ppod(ppod, ttinfo, &sg, | |
1112 | &sg_off); | |
1113 | skb->priority = CPL_PRIORITY_CONTROL; | |
1114 | cxgb3_ofld_send(ppm->lldev, skb); | |
1115 | } | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static void ddp_clear_map(struct cxgbi_device *cdev, struct cxgbi_ppm *ppm, | |
1120 | struct cxgbi_task_tag_info *ttinfo) | |
1121 | { | |
1122 | unsigned int idx = ttinfo->idx; | |
1123 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; | |
1124 | unsigned int npods = ttinfo->npods; | |
1125 | int i; | |
1126 | ||
1127 | log_debug(1 << CXGBI_DBG_DDP, | |
1128 | "cdev 0x%p, clear idx %u, npods %u.\n", | |
1129 | cdev, idx, npods); | |
1130 | ||
1131 | for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) { | |
1132 | struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + | |
1133 | IPPOD_SIZE, 0, GFP_ATOMIC); | |
1134 | ||
1135 | if (!skb) { | |
1136 | pr_err("cdev 0x%p, clear ddp, %u,%d/%u, skb OOM.\n", | |
1137 | cdev, idx, i, npods); | |
1138 | continue; | |
1139 | } | |
1140 | ulp_mem_io_set_hdr(skb, pm_addr); | |
1141 | skb->priority = CPL_PRIORITY_CONTROL; | |
1142 | cxgb3_ofld_send(ppm->lldev, skb); | |
1143 | } | |
6f7efaab | 1144 | } |
1145 | ||
6f7efaab | 1146 | static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, |
1147 | unsigned int tid, int pg_idx, bool reply) | |
1148 | { | |
24d3f95a | 1149 | struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, |
6f7efaab | 1150 | GFP_KERNEL); |
1151 | struct cpl_set_tcb_field *req; | |
1152 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; | |
1153 | ||
1154 | log_debug(1 << CXGBI_DBG_DDP, | |
1155 | "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx); | |
1156 | if (!skb) | |
1157 | return -ENOMEM; | |
1158 | ||
1159 | /* set up ulp submode and page size */ | |
1160 | req = (struct cpl_set_tcb_field *)skb->head; | |
1161 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1162 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
1163 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
1164 | req->cpu_idx = 0; | |
1165 | req->word = htons(31); | |
1166 | req->mask = cpu_to_be64(0xF0000000); | |
1167 | req->val = cpu_to_be64(val << 28); | |
1168 | skb->priority = CPL_PRIORITY_CONTROL; | |
1169 | ||
1170 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | /** | |
1175 | * cxgb3i_setup_conn_digest - setup conn. digest setting | |
1176 | * @csk: cxgb tcp socket | |
1177 | * @tid: connection id | |
1178 | * @hcrc: header digest enabled | |
1179 | * @dcrc: data digest enabled | |
1180 | * @reply: request reply from h/w | |
1181 | * set up the iscsi digest settings for a connection identified by tid | |
1182 | */ | |
1183 | static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, | |
1184 | int hcrc, int dcrc, int reply) | |
1185 | { | |
24d3f95a | 1186 | struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, |
6f7efaab | 1187 | GFP_KERNEL); |
1188 | struct cpl_set_tcb_field *req; | |
1189 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); | |
1190 | ||
1191 | log_debug(1 << CXGBI_DBG_DDP, | |
1192 | "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc); | |
1193 | if (!skb) | |
1194 | return -ENOMEM; | |
1195 | ||
1196 | /* set up ulp submode and page size */ | |
1197 | req = (struct cpl_set_tcb_field *)skb->head; | |
1198 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1199 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
1200 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
1201 | req->cpu_idx = 0; | |
1202 | req->word = htons(31); | |
1203 | req->mask = cpu_to_be64(0x0F000000); | |
1204 | req->val = cpu_to_be64(val << 24); | |
1205 | skb->priority = CPL_PRIORITY_CONTROL; | |
1206 | ||
1207 | cxgb3_ofld_send(csk->cdev->lldev, skb); | |
1208 | return 0; | |
1209 | } | |
1210 | ||
6f7efaab | 1211 | /** |
b75113b1 | 1212 | * cxgb3i_ddp_init - initialize the cxgb3 adapter's ddp resource |
6f7efaab | 1213 | * @cdev: cxgb3i adapter |
1214 | * initialize the ddp pagepod manager for a given adapter | |
1215 | */ | |
1216 | static int cxgb3i_ddp_init(struct cxgbi_device *cdev) | |
1217 | { | |
b75113b1 VP |
1218 | struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; |
1219 | struct net_device *ndev = cdev->ports[0]; | |
1220 | struct cxgbi_tag_format tformat; | |
1221 | unsigned int ppmax, tagmask = 0; | |
1222 | struct ulp_iscsi_info uinfo; | |
1223 | int i, err; | |
1224 | ||
1225 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); | |
1226 | if (err < 0) { | |
1227 | pr_err("%s, failed to get iscsi param %d.\n", | |
1228 | ndev->name, err); | |
1229 | return err; | |
1230 | } | |
1231 | if (uinfo.llimit >= uinfo.ulimit) { | |
1232 | pr_warn("T3 %s, iscsi NOT enabled %u ~ %u!\n", | |
1233 | ndev->name, uinfo.llimit, uinfo.ulimit); | |
1234 | return -EACCES; | |
1235 | } | |
1236 | ||
1237 | ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; | |
9d5c44b7 | 1238 | tagmask = cxgbi_tagmask_set(ppmax); |
b75113b1 VP |
1239 | |
1240 | pr_info("T3 %s: 0x%x~0x%x, 0x%x, tagmask 0x%x -> 0x%x.\n", | |
1241 | ndev->name, uinfo.llimit, uinfo.ulimit, ppmax, uinfo.tagmask, | |
1242 | tagmask); | |
1243 | ||
1244 | memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); | |
1245 | for (i = 0; i < 4; i++) | |
1246 | tformat.pgsz_order[i] = uinfo.pgsz_factor[i]; | |
1247 | cxgbi_tagmask_check(tagmask, &tformat); | |
1248 | ||
1249 | cxgbi_ddp_ppm_setup(&tdev->ulp_iscsi, cdev, &tformat, ppmax, | |
1250 | uinfo.llimit, uinfo.llimit, 0); | |
1251 | if (!(cdev->flags & CXGBI_FLAG_DDP_OFF)) { | |
1252 | uinfo.tagmask = tagmask; | |
1253 | uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); | |
1254 | ||
1255 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); | |
1256 | if (err < 0) { | |
1257 | pr_err("T3 %s fail to set iscsi param %d.\n", | |
1258 | ndev->name, err); | |
1259 | cdev->flags |= CXGBI_FLAG_DDP_OFF; | |
1260 | } | |
1261 | err = 0; | |
1262 | } | |
1263 | ||
6f7efaab | 1264 | cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; |
1265 | cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; | |
b75113b1 VP |
1266 | cdev->csk_ddp_set_map = ddp_set_map; |
1267 | cdev->csk_ddp_clear_map = ddp_clear_map; | |
1268 | cdev->cdev2ppm = cdev2ppm; | |
1269 | cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
1270 | uinfo.max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
1271 | cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
1272 | uinfo.max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
1273 | ||
6f7efaab | 1274 | return 0; |
1275 | } | |
1276 | ||
1277 | static void cxgb3i_dev_close(struct t3cdev *t3dev) | |
1278 | { | |
1279 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); | |
1280 | ||
1281 | if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { | |
1282 | pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0); | |
1283 | return; | |
1284 | } | |
1285 | ||
1286 | cxgbi_device_unregister(cdev); | |
1287 | } | |
1288 | ||
1289 | /** | |
1290 | * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings | |
1291 | * @t3dev: t3cdev adapter | |
1292 | */ | |
1293 | static void cxgb3i_dev_open(struct t3cdev *t3dev) | |
1294 | { | |
1295 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); | |
1296 | struct adapter *adapter = tdev2adap(t3dev); | |
1297 | int i, err; | |
1298 | ||
1299 | if (cdev) { | |
1300 | pr_info("0x%p, updating.\n", cdev); | |
1301 | return; | |
1302 | } | |
1303 | ||
1304 | cdev = cxgbi_device_register(0, adapter->params.nports); | |
1305 | if (!cdev) { | |
1306 | pr_warn("device 0x%p register failed.\n", t3dev); | |
1307 | return; | |
1308 | } | |
1309 | ||
1310 | cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET; | |
1311 | cdev->lldev = t3dev; | |
1312 | cdev->pdev = adapter->pdev; | |
1313 | cdev->ports = adapter->port; | |
1314 | cdev->nports = adapter->params.nports; | |
1315 | cdev->mtus = adapter->params.mtus; | |
1316 | cdev->nmtus = NMTUS; | |
6f7efaab | 1317 | cdev->rx_credit_thres = cxgb3i_rx_credit_thres; |
1318 | cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; | |
1319 | cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); | |
6f7efaab | 1320 | cdev->itp = &cxgb3i_iscsi_transport; |
1321 | ||
1322 | err = cxgb3i_ddp_init(cdev); | |
1323 | if (err) { | |
1324 | pr_info("0x%p ddp init failed\n", cdev); | |
1325 | goto err_out; | |
1326 | } | |
1327 | ||
1328 | err = cxgb3i_ofld_init(cdev); | |
1329 | if (err) { | |
1330 | pr_info("0x%p offload init failed\n", cdev); | |
1331 | goto err_out; | |
1332 | } | |
1333 | ||
1334 | err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, | |
1335 | &cxgb3i_host_template, cxgb3i_stt); | |
1336 | if (err) | |
1337 | goto err_out; | |
1338 | ||
1339 | for (i = 0; i < cdev->nports; i++) | |
1340 | cdev->hbas[i]->ipv4addr = | |
1341 | cxgb3i_get_private_ipv4addr(cdev->ports[i]); | |
1342 | ||
1343 | pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", | |
1344 | cdev, cdev ? cdev->flags : 0, t3dev, err); | |
1345 | return; | |
1346 | ||
1347 | err_out: | |
1348 | cxgbi_device_unregister(cdev); | |
1349 | } | |
1350 | ||
1351 | static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) | |
1352 | { | |
1353 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); | |
1354 | ||
1355 | log_debug(1 << CXGBI_DBG_TOE, | |
1356 | "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", | |
1357 | t3dev, cdev, event, port); | |
1358 | if (!cdev) | |
1359 | return; | |
1360 | ||
1361 | switch (event) { | |
1362 | case OFFLOAD_STATUS_DOWN: | |
1363 | cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; | |
1364 | break; | |
1365 | case OFFLOAD_STATUS_UP: | |
1366 | cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; | |
1367 | break; | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | /** | |
1372 | * cxgb3i_init_module - module init entry point | |
1373 | * | |
1374 | * initialize any driver wide global data structures and register itself | |
1375 | * with the cxgb3 module | |
1376 | */ | |
1377 | static int __init cxgb3i_init_module(void) | |
1378 | { | |
1379 | int rc; | |
1380 | ||
1381 | printk(KERN_INFO "%s", version); | |
1382 | ||
1383 | rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt); | |
1384 | if (rc < 0) | |
1385 | return rc; | |
1386 | ||
1387 | cxgb3_register_client(&t3_client); | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | /** | |
1392 | * cxgb3i_exit_module - module cleanup/exit entry point | |
1393 | * | |
1394 | * go through the driver hba list and for each hba, release any resource held. | |
1395 | * and unregisters iscsi transport and the cxgb3 module | |
1396 | */ | |
1397 | static void __exit cxgb3i_exit_module(void) | |
1398 | { | |
1399 | cxgb3_unregister_client(&t3_client); | |
1400 | cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); | |
1401 | cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt); | |
1402 | } | |
1403 | ||
1404 | module_init(cxgb3i_init_module); | |
1405 | module_exit(cxgb3i_exit_module); |