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6733b39a | 1 | /** |
d2eeb1ac | 2 | * Copyright (C) 2005 - 2010 ServerEngines |
6733b39a JK |
3 | * All rights reserved. |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License version 2 | |
7 | * as published by the Free Software Foundation. The full GNU General | |
8 | * Public License is included in this distribution in the file called COPYING. | |
9 | * | |
10 | * Written by: Jayamohan Kallickal (jayamohank@serverengines.com) | |
11 | * | |
12 | * Contact Information: | |
13 | * linux-drivers@serverengines.com | |
14 | * | |
15 | * ServerEngines | |
16 | * 209 N. Fair Oaks Ave | |
17 | * Sunnyvale, CA 94085 | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <scsi/libiscsi.h> | |
22 | #include <scsi/scsi_transport_iscsi.h> | |
23 | #include <scsi/scsi_transport.h> | |
24 | #include <scsi/scsi_cmnd.h> | |
25 | #include <scsi/scsi_device.h> | |
26 | #include <scsi/scsi_host.h> | |
27 | #include <scsi/scsi.h> | |
28 | ||
29 | #include "be_iscsi.h" | |
30 | ||
31 | extern struct iscsi_transport beiscsi_iscsi_transport; | |
32 | ||
33 | /** | |
34 | * beiscsi_session_create - creates a new iscsi session | |
35 | * @cmds_max: max commands supported | |
36 | * @qdepth: max queue depth supported | |
37 | * @initial_cmdsn: initial iscsi CMDSN | |
38 | */ | |
39 | struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep, | |
40 | u16 cmds_max, | |
41 | u16 qdepth, | |
42 | u32 initial_cmdsn) | |
43 | { | |
44 | struct Scsi_Host *shost; | |
45 | struct beiscsi_endpoint *beiscsi_ep; | |
46 | struct iscsi_cls_session *cls_session; | |
6733b39a | 47 | struct beiscsi_hba *phba; |
b8b9e1b8 JK |
48 | struct iscsi_session *sess; |
49 | struct beiscsi_session *beiscsi_sess; | |
6733b39a | 50 | struct beiscsi_io_task *io_task; |
6733b39a JK |
51 | |
52 | SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n"); | |
53 | ||
54 | if (!ep) { | |
55 | SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep \n"); | |
56 | return NULL; | |
57 | } | |
58 | beiscsi_ep = ep->dd_data; | |
59 | phba = beiscsi_ep->phba; | |
60 | shost = phba->shost; | |
61 | if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { | |
62 | shost_printk(KERN_ERR, shost, "Cannot handle %d cmds." | |
63 | "Max cmds per session supported is %d. Using %d. " | |
64 | "\n", cmds_max, | |
65 | beiscsi_ep->phba->params.wrbs_per_cxn, | |
66 | beiscsi_ep->phba->params.wrbs_per_cxn); | |
67 | cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; | |
68 | } | |
69 | ||
bfead3b2 JK |
70 | cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, |
71 | shost, cmds_max, | |
72 | sizeof(*beiscsi_sess), | |
73 | sizeof(*io_task), | |
74 | initial_cmdsn, ISCSI_MAX_TARGET); | |
6733b39a JK |
75 | if (!cls_session) |
76 | return NULL; | |
77 | sess = cls_session->dd_data; | |
2afc95bf JK |
78 | beiscsi_sess = sess->dd_data; |
79 | beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool", | |
80 | phba->pcidev, | |
81 | sizeof(struct be_cmd_bhs), | |
82 | 64, 0); | |
83 | if (!beiscsi_sess->bhs_pool) | |
84 | goto destroy_sess; | |
6733b39a | 85 | |
6733b39a | 86 | return cls_session; |
2afc95bf JK |
87 | destroy_sess: |
88 | iscsi_session_teardown(cls_session); | |
89 | return NULL; | |
6733b39a JK |
90 | } |
91 | ||
92 | /** | |
93 | * beiscsi_session_destroy - destroys iscsi session | |
94 | * @cls_session: pointer to iscsi cls session | |
95 | * | |
96 | * Destroys iSCSI session instance and releases | |
97 | * resources allocated for it. | |
98 | */ | |
99 | void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) | |
100 | { | |
6733b39a | 101 | struct iscsi_session *sess = cls_session->dd_data; |
2afc95bf | 102 | struct beiscsi_session *beiscsi_sess = sess->dd_data; |
6733b39a | 103 | |
756d29c8 | 104 | SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n"); |
2afc95bf | 105 | pci_pool_destroy(beiscsi_sess->bhs_pool); |
6733b39a JK |
106 | iscsi_session_teardown(cls_session); |
107 | } | |
108 | ||
109 | /** | |
110 | * beiscsi_conn_create - create an instance of iscsi connection | |
111 | * @cls_session: ptr to iscsi_cls_session | |
112 | * @cid: iscsi cid | |
113 | */ | |
114 | struct iscsi_cls_conn * | |
115 | beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) | |
116 | { | |
117 | struct beiscsi_hba *phba; | |
118 | struct Scsi_Host *shost; | |
119 | struct iscsi_cls_conn *cls_conn; | |
120 | struct beiscsi_conn *beiscsi_conn; | |
121 | struct iscsi_conn *conn; | |
2afc95bf JK |
122 | struct iscsi_session *sess; |
123 | struct beiscsi_session *beiscsi_sess; | |
6733b39a JK |
124 | |
125 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid" | |
126 | "from iscsi layer=%d\n", cid); | |
127 | shost = iscsi_session_to_shost(cls_session); | |
128 | phba = iscsi_host_priv(shost); | |
129 | ||
130 | cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); | |
131 | if (!cls_conn) | |
132 | return NULL; | |
133 | ||
134 | conn = cls_conn->dd_data; | |
135 | beiscsi_conn = conn->dd_data; | |
136 | beiscsi_conn->ep = NULL; | |
137 | beiscsi_conn->phba = phba; | |
138 | beiscsi_conn->conn = conn; | |
2afc95bf JK |
139 | sess = cls_session->dd_data; |
140 | beiscsi_sess = sess->dd_data; | |
141 | beiscsi_conn->beiscsi_sess = beiscsi_sess; | |
6733b39a JK |
142 | return cls_conn; |
143 | } | |
144 | ||
145 | /** | |
146 | * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table | |
147 | * @beiscsi_conn: The pointer to beiscsi_conn structure | |
148 | * @phba: The phba instance | |
149 | * @cid: The cid to free | |
150 | */ | |
151 | static int beiscsi_bindconn_cid(struct beiscsi_hba *phba, | |
152 | struct beiscsi_conn *beiscsi_conn, | |
153 | unsigned int cid) | |
154 | { | |
155 | if (phba->conn_table[cid]) { | |
156 | SE_DEBUG(DBG_LVL_1, | |
157 | "Connection table already occupied. Detected clash\n"); | |
158 | return -EINVAL; | |
159 | } else { | |
160 | SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn) \n", | |
161 | cid, beiscsi_conn); | |
162 | phba->conn_table[cid] = beiscsi_conn; | |
163 | } | |
164 | return 0; | |
165 | } | |
166 | ||
167 | /** | |
168 | * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection | |
169 | * @cls_session: pointer to iscsi cls session | |
170 | * @cls_conn: pointer to iscsi cls conn | |
171 | * @transport_fd: EP handle(64 bit) | |
172 | * | |
173 | * This function binds the TCP Conn with iSCSI Connection and Session. | |
174 | */ | |
175 | int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, | |
176 | struct iscsi_cls_conn *cls_conn, | |
177 | u64 transport_fd, int is_leading) | |
178 | { | |
179 | struct iscsi_conn *conn = cls_conn->dd_data; | |
180 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; | |
181 | struct Scsi_Host *shost = | |
182 | (struct Scsi_Host *)iscsi_session_to_shost(cls_session); | |
183 | struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); | |
184 | struct beiscsi_endpoint *beiscsi_ep; | |
185 | struct iscsi_endpoint *ep; | |
186 | ||
187 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n"); | |
188 | ep = iscsi_lookup_endpoint(transport_fd); | |
189 | if (!ep) | |
190 | return -EINVAL; | |
191 | ||
192 | beiscsi_ep = ep->dd_data; | |
193 | ||
194 | if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) | |
195 | return -EINVAL; | |
196 | ||
197 | if (beiscsi_ep->phba != phba) { | |
198 | SE_DEBUG(DBG_LVL_8, | |
199 | "beiscsi_ep->hba=%p not equal to phba=%p \n", | |
200 | beiscsi_ep->phba, phba); | |
201 | return -EEXIST; | |
202 | } | |
203 | ||
204 | beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; | |
205 | beiscsi_conn->ep = beiscsi_ep; | |
206 | beiscsi_ep->conn = beiscsi_conn; | |
207 | SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d \n", | |
208 | beiscsi_conn, conn, beiscsi_ep->ep_cid); | |
209 | return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid); | |
210 | } | |
211 | ||
212 | /** | |
213 | * beiscsi_conn_get_param - get the iscsi parameter | |
214 | * @cls_conn: pointer to iscsi cls conn | |
215 | * @param: parameter type identifier | |
216 | * @buf: buffer pointer | |
217 | * | |
218 | * returns iscsi parameter | |
219 | */ | |
220 | int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, | |
221 | enum iscsi_param param, char *buf) | |
222 | { | |
223 | struct beiscsi_endpoint *beiscsi_ep; | |
224 | struct iscsi_conn *conn = cls_conn->dd_data; | |
225 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; | |
226 | int len = 0; | |
227 | ||
756d29c8 | 228 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param); |
6733b39a JK |
229 | beiscsi_ep = beiscsi_conn->ep; |
230 | if (!beiscsi_ep) { | |
231 | SE_DEBUG(DBG_LVL_1, | |
232 | "In beiscsi_conn_get_param , no beiscsi_ep\n"); | |
233 | return -1; | |
234 | } | |
235 | ||
236 | switch (param) { | |
237 | case ISCSI_PARAM_CONN_PORT: | |
238 | len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); | |
239 | break; | |
240 | case ISCSI_PARAM_CONN_ADDRESS: | |
241 | if (beiscsi_ep->ip_type == BE2_IPV4) | |
242 | len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); | |
243 | else | |
244 | len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); | |
245 | break; | |
246 | default: | |
247 | return iscsi_conn_get_param(cls_conn, param, buf); | |
248 | } | |
249 | return len; | |
250 | } | |
251 | ||
252 | int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, | |
253 | enum iscsi_param param, char *buf, int buflen) | |
254 | { | |
255 | struct iscsi_conn *conn = cls_conn->dd_data; | |
256 | struct iscsi_session *session = conn->session; | |
257 | int ret; | |
258 | ||
756d29c8 | 259 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param); |
6733b39a JK |
260 | ret = iscsi_set_param(cls_conn, param, buf, buflen); |
261 | if (ret) | |
262 | return ret; | |
263 | /* | |
264 | * If userspace tried to set the value to higher than we can | |
265 | * support override here. | |
266 | */ | |
267 | switch (param) { | |
268 | case ISCSI_PARAM_FIRST_BURST: | |
269 | if (session->first_burst > 8192) | |
270 | session->first_burst = 8192; | |
271 | break; | |
272 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
273 | if (conn->max_recv_dlength > 65536) | |
274 | conn->max_recv_dlength = 65536; | |
275 | break; | |
276 | case ISCSI_PARAM_MAX_BURST: | |
230dceb4 JK |
277 | if (session->max_burst > 262144) |
278 | session->max_burst = 262144; | |
6733b39a JK |
279 | break; |
280 | default: | |
281 | return 0; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | /** | |
288 | * beiscsi_get_host_param - get the iscsi parameter | |
289 | * @shost: pointer to scsi_host structure | |
290 | * @param: parameter type identifier | |
291 | * @buf: buffer pointer | |
292 | * | |
293 | * returns host parameter | |
294 | */ | |
295 | int beiscsi_get_host_param(struct Scsi_Host *shost, | |
296 | enum iscsi_host_param param, char *buf) | |
297 | { | |
298 | struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); | |
756d29c8 JK |
299 | struct be_cmd_resp_get_mac_addr *resp; |
300 | struct be_mcc_wrb *wrb; | |
301 | unsigned int tag, wrb_num; | |
6733b39a | 302 | int len = 0; |
756d29c8 JK |
303 | unsigned short status, extd_status; |
304 | struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; | |
6733b39a | 305 | |
756d29c8 | 306 | SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); |
6733b39a JK |
307 | switch (param) { |
308 | case ISCSI_HOST_PARAM_HWADDRESS: | |
756d29c8 JK |
309 | tag = be_cmd_get_mac_addr(phba); |
310 | if (!tag) { | |
311 | SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed \n"); | |
312 | return -1; | |
313 | } else | |
314 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
315 | phba->ctrl.mcc_numtag[tag]); | |
316 | ||
317 | wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; | |
318 | extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; | |
319 | status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; | |
320 | if (status || extd_status) { | |
321 | SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed" | |
322 | " status = %d extd_status = %d \n", | |
323 | status, extd_status); | |
324 | free_mcc_tag(&phba->ctrl, tag); | |
325 | return -1; | |
326 | } else { | |
327 | wrb = queue_get_wrb(mccq, wrb_num); | |
328 | free_mcc_tag(&phba->ctrl, tag); | |
329 | resp = embedded_payload(wrb); | |
330 | memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); | |
331 | len = sysfs_format_mac(buf, phba->mac_address, | |
332 | ETH_ALEN); | |
333 | } | |
6733b39a JK |
334 | break; |
335 | default: | |
336 | return iscsi_host_get_param(shost, param, buf); | |
337 | } | |
338 | return len; | |
339 | } | |
340 | ||
341 | /** | |
342 | * beiscsi_conn_get_stats - get the iscsi stats | |
343 | * @cls_conn: pointer to iscsi cls conn | |
344 | * @stats: pointer to iscsi_stats structure | |
345 | * | |
346 | * returns iscsi stats | |
347 | */ | |
348 | void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, | |
349 | struct iscsi_stats *stats) | |
350 | { | |
351 | struct iscsi_conn *conn = cls_conn->dd_data; | |
352 | ||
353 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); | |
354 | stats->txdata_octets = conn->txdata_octets; | |
355 | stats->rxdata_octets = conn->rxdata_octets; | |
356 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
357 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
358 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
359 | stats->datain_pdus = conn->datain_pdus_cnt; | |
360 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
361 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
362 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
363 | stats->digest_err = 0; | |
364 | stats->timeout_err = 0; | |
365 | stats->custom_length = 0; | |
366 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); | |
367 | stats->custom[0].value = conn->eh_abort_cnt; | |
368 | } | |
369 | ||
370 | /** | |
371 | * beiscsi_set_params_for_offld - get the parameters for offload | |
372 | * @beiscsi_conn: pointer to beiscsi_conn | |
373 | * @params: pointer to offload_params structure | |
374 | */ | |
375 | static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, | |
376 | struct beiscsi_offload_params *params) | |
377 | { | |
378 | struct iscsi_conn *conn = beiscsi_conn->conn; | |
379 | struct iscsi_session *session = conn->session; | |
380 | ||
381 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, | |
382 | params, session->max_burst); | |
383 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, | |
384 | max_send_data_segment_length, params, | |
385 | conn->max_xmit_dlength); | |
386 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, | |
387 | params, session->first_burst); | |
388 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, | |
389 | session->erl); | |
390 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, | |
391 | conn->datadgst_en); | |
392 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, | |
393 | conn->hdrdgst_en); | |
394 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, | |
395 | session->initial_r2t_en); | |
396 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, | |
397 | session->imm_data_en); | |
398 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, | |
399 | (conn->exp_statsn - 1)); | |
400 | } | |
401 | ||
402 | /** | |
403 | * beiscsi_conn_start - offload of session to chip | |
404 | * @cls_conn: pointer to beiscsi_conn | |
405 | */ | |
406 | int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) | |
407 | { | |
408 | struct iscsi_conn *conn = cls_conn->dd_data; | |
409 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; | |
410 | struct beiscsi_endpoint *beiscsi_ep; | |
411 | struct beiscsi_offload_params params; | |
6733b39a | 412 | |
756d29c8 | 413 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); |
6733b39a JK |
414 | memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); |
415 | beiscsi_ep = beiscsi_conn->ep; | |
416 | if (!beiscsi_ep) | |
417 | SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); | |
418 | ||
6733b39a JK |
419 | beiscsi_conn->login_in_progress = 0; |
420 | beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); | |
421 | beiscsi_offload_connection(beiscsi_conn, ¶ms); | |
422 | iscsi_conn_start(cls_conn); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /** | |
427 | * beiscsi_get_cid - Allocate a cid | |
428 | * @phba: The phba instance | |
429 | */ | |
430 | static int beiscsi_get_cid(struct beiscsi_hba *phba) | |
431 | { | |
432 | unsigned short cid = 0xFFFF; | |
433 | ||
434 | if (!phba->avlbl_cids) | |
435 | return cid; | |
436 | ||
437 | cid = phba->cid_array[phba->cid_alloc++]; | |
438 | if (phba->cid_alloc == phba->params.cxns_per_ctrl) | |
439 | phba->cid_alloc = 0; | |
440 | phba->avlbl_cids--; | |
441 | return cid; | |
442 | } | |
443 | ||
444 | /** | |
445 | * beiscsi_open_conn - Ask FW to open a TCP connection | |
446 | * @ep: endpoint to be used | |
447 | * @src_addr: The source IP address | |
448 | * @dst_addr: The Destination IP address | |
449 | * | |
450 | * Asks the FW to open a TCP connection | |
451 | */ | |
452 | static int beiscsi_open_conn(struct iscsi_endpoint *ep, | |
453 | struct sockaddr *src_addr, | |
454 | struct sockaddr *dst_addr, int non_blocking) | |
455 | { | |
456 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; | |
457 | struct beiscsi_hba *phba = beiscsi_ep->phba; | |
756d29c8 JK |
458 | struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; |
459 | struct be_mcc_wrb *wrb; | |
460 | struct tcp_connect_and_offload_out *ptcpcnct_out; | |
461 | unsigned short status, extd_status; | |
462 | unsigned int tag, wrb_num; | |
6733b39a JK |
463 | int ret = -1; |
464 | ||
756d29c8 | 465 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); |
6733b39a JK |
466 | beiscsi_ep->ep_cid = beiscsi_get_cid(phba); |
467 | if (beiscsi_ep->ep_cid == 0xFFFF) { | |
468 | SE_DEBUG(DBG_LVL_1, "No free cid available\n"); | |
469 | return ret; | |
470 | } | |
471 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d ", | |
472 | beiscsi_ep->ep_cid); | |
7da50879 JK |
473 | phba->ep_array[beiscsi_ep->ep_cid - |
474 | phba->fw_config.iscsi_cid_start] = ep; | |
475 | if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + | |
476 | phba->params.cxns_per_ctrl * 2)) { | |
6733b39a JK |
477 | SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); |
478 | return ret; | |
479 | } | |
480 | ||
481 | beiscsi_ep->cid_vld = 0; | |
756d29c8 JK |
482 | tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep); |
483 | if (!tag) { | |
484 | SE_DEBUG(DBG_LVL_1, | |
90a289e8 | 485 | "mgmt_open_connection Failed for cid=%d \n", |
756d29c8 JK |
486 | beiscsi_ep->ep_cid); |
487 | } else { | |
488 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
489 | phba->ctrl.mcc_numtag[tag]); | |
490 | } | |
491 | wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; | |
492 | extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; | |
493 | status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; | |
494 | if (status || extd_status) { | |
495 | SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" | |
496 | " status = %d extd_status = %d \n", | |
497 | status, extd_status); | |
498 | free_mcc_tag(&phba->ctrl, tag); | |
499 | return -1; | |
500 | } else { | |
501 | wrb = queue_get_wrb(mccq, wrb_num); | |
502 | free_mcc_tag(&phba->ctrl, tag); | |
503 | ||
504 | ptcpcnct_out = embedded_payload(wrb); | |
505 | beiscsi_ep = ep->dd_data; | |
506 | beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; | |
507 | beiscsi_ep->cid_vld = 1; | |
508 | SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); | |
509 | } | |
510 | return 0; | |
6733b39a JK |
511 | } |
512 | ||
513 | /** | |
514 | * beiscsi_put_cid - Free the cid | |
515 | * @phba: The phba for which the cid is being freed | |
516 | * @cid: The cid to free | |
517 | */ | |
518 | static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) | |
519 | { | |
520 | phba->avlbl_cids++; | |
521 | phba->cid_array[phba->cid_free++] = cid; | |
522 | if (phba->cid_free == phba->params.cxns_per_ctrl) | |
523 | phba->cid_free = 0; | |
524 | } | |
525 | ||
526 | /** | |
527 | * beiscsi_free_ep - free endpoint | |
528 | * @ep: pointer to iscsi endpoint structure | |
529 | */ | |
c2462288 | 530 | static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) |
6733b39a | 531 | { |
6733b39a JK |
532 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
533 | ||
534 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); | |
535 | beiscsi_ep->phba = NULL; | |
6733b39a JK |
536 | } |
537 | ||
538 | /** | |
539 | * beiscsi_ep_connect - Ask chip to create TCP Conn | |
540 | * @scsi_host: Pointer to scsi_host structure | |
541 | * @dst_addr: The IP address of Target | |
542 | * @non_blocking: blocking or non-blocking call | |
543 | * | |
544 | * This routines first asks chip to create a connection and then allocates an EP | |
545 | */ | |
546 | struct iscsi_endpoint * | |
547 | beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, | |
548 | int non_blocking) | |
549 | { | |
550 | struct beiscsi_hba *phba; | |
551 | struct beiscsi_endpoint *beiscsi_ep; | |
552 | struct iscsi_endpoint *ep; | |
553 | int ret; | |
554 | ||
555 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect \n"); | |
556 | if (shost) | |
557 | phba = iscsi_host_priv(shost); | |
558 | else { | |
559 | ret = -ENXIO; | |
560 | SE_DEBUG(DBG_LVL_1, "shost is NULL \n"); | |
561 | return ERR_PTR(ret); | |
562 | } | |
bfead3b2 | 563 | |
5dc1c416 | 564 | if (phba->state != BE_ADAPTER_UP) { |
bfead3b2 | 565 | ret = -EBUSY; |
c2462288 | 566 | SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP \n"); |
bfead3b2 JK |
567 | return ERR_PTR(ret); |
568 | } | |
569 | ||
6733b39a JK |
570 | ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); |
571 | if (!ep) { | |
572 | ret = -ENOMEM; | |
573 | return ERR_PTR(ret); | |
574 | } | |
575 | ||
576 | beiscsi_ep = ep->dd_data; | |
577 | beiscsi_ep->phba = phba; | |
c2462288 | 578 | beiscsi_ep->openiscsi_ep = ep; |
6733b39a | 579 | if (beiscsi_open_conn(ep, NULL, dst_addr, non_blocking)) { |
c2462288 | 580 | SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn \n"); |
6733b39a JK |
581 | ret = -ENOMEM; |
582 | goto free_ep; | |
583 | } | |
584 | ||
585 | return ep; | |
586 | ||
587 | free_ep: | |
c2462288 | 588 | beiscsi_free_ep(beiscsi_ep); |
6733b39a JK |
589 | return ERR_PTR(ret); |
590 | } | |
591 | ||
592 | /** | |
593 | * beiscsi_ep_poll - Poll to see if connection is established | |
594 | * @ep: endpoint to be used | |
595 | * @timeout_ms: timeout specified in millisecs | |
596 | * | |
597 | * Poll to see if TCP connection established | |
598 | */ | |
599 | int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
600 | { | |
601 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; | |
602 | ||
603 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); | |
604 | if (beiscsi_ep->cid_vld == 1) | |
605 | return 1; | |
606 | else | |
607 | return 0; | |
608 | } | |
609 | ||
610 | /** | |
611 | * beiscsi_close_conn - Upload the connection | |
612 | * @ep: The iscsi endpoint | |
613 | * @flag: The type of connection closure | |
614 | */ | |
c2462288 | 615 | static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) |
6733b39a JK |
616 | { |
617 | int ret = 0; | |
756d29c8 | 618 | unsigned int tag; |
6733b39a JK |
619 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
620 | ||
756d29c8 JK |
621 | tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); |
622 | if (!tag) { | |
6733b39a JK |
623 | SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x", |
624 | beiscsi_ep->ep_cid); | |
625 | ret = -1; | |
756d29c8 JK |
626 | } else { |
627 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
628 | phba->ctrl.mcc_numtag[tag]); | |
629 | free_mcc_tag(&phba->ctrl, tag); | |
6733b39a | 630 | } |
6733b39a JK |
631 | return ret; |
632 | } | |
633 | ||
634 | /** | |
635 | * beiscsi_ep_disconnect - Tears down the TCP connection | |
636 | * @ep: endpoint to be used | |
637 | * | |
638 | * Tears down the TCP connection | |
639 | */ | |
640 | void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) | |
641 | { | |
642 | struct beiscsi_conn *beiscsi_conn; | |
643 | struct beiscsi_endpoint *beiscsi_ep; | |
644 | struct beiscsi_hba *phba; | |
6733b39a JK |
645 | |
646 | beiscsi_ep = ep->dd_data; | |
647 | phba = beiscsi_ep->phba; | |
756d29c8 JK |
648 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", |
649 | beiscsi_ep->ep_cid); | |
6733b39a JK |
650 | |
651 | if (beiscsi_ep->conn) { | |
652 | beiscsi_conn = beiscsi_ep->conn; | |
653 | iscsi_suspend_queue(beiscsi_conn->conn); | |
6733b39a JK |
654 | } |
655 | ||
6733b39a JK |
656 | } |
657 | ||
658 | /** | |
659 | * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table | |
660 | * @phba: The phba instance | |
661 | * @cid: The cid to free | |
662 | */ | |
663 | static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, | |
664 | unsigned int cid) | |
665 | { | |
666 | if (phba->conn_table[cid]) | |
667 | phba->conn_table[cid] = NULL; | |
668 | else { | |
669 | SE_DEBUG(DBG_LVL_8, "Connection table Not occupied. \n"); | |
670 | return -EINVAL; | |
671 | } | |
672 | return 0; | |
673 | } | |
674 | ||
675 | /** | |
676 | * beiscsi_conn_stop - Invalidate and stop the connection | |
677 | * @cls_conn: pointer to get iscsi_conn | |
678 | * @flag: The type of connection closure | |
679 | */ | |
680 | void beiscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) | |
681 | { | |
682 | struct iscsi_conn *conn = cls_conn->dd_data; | |
683 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; | |
684 | struct beiscsi_endpoint *beiscsi_ep; | |
685 | struct iscsi_session *session = conn->session; | |
686 | struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); | |
687 | struct beiscsi_hba *phba = iscsi_host_priv(shost); | |
756d29c8 | 688 | unsigned int tag; |
6733b39a JK |
689 | unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; |
690 | ||
6733b39a JK |
691 | beiscsi_ep = beiscsi_conn->ep; |
692 | if (!beiscsi_ep) { | |
693 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop , no beiscsi_ep\n"); | |
694 | return; | |
695 | } | |
756d29c8 JK |
696 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop ep_cid = %d\n", |
697 | beiscsi_ep->ep_cid); | |
698 | tag = mgmt_invalidate_connection(phba, beiscsi_ep, | |
6733b39a JK |
699 | beiscsi_ep->ep_cid, 1, |
700 | savecfg_flag); | |
756d29c8 | 701 | if (!tag) { |
6733b39a JK |
702 | SE_DEBUG(DBG_LVL_1, |
703 | "mgmt_invalidate_connection Failed for cid=%d \n", | |
90a289e8 | 704 | beiscsi_ep->ep_cid); |
756d29c8 JK |
705 | } else { |
706 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
707 | phba->ctrl.mcc_numtag[tag]); | |
708 | free_mcc_tag(&phba->ctrl, tag); | |
6733b39a | 709 | } |
c2462288 JK |
710 | beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); |
711 | beiscsi_free_ep(beiscsi_ep); | |
712 | iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); | |
6733b39a JK |
713 | beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); |
714 | iscsi_conn_stop(cls_conn, flag); | |
715 | } |