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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) { | |
457ff3b7 | 55 | SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n"); |
6733b39a JK |
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 { | |
457ff3b7 | 160 | SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n", |
6733b39a JK |
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, | |
457ff3b7 | 199 | "beiscsi_ep->hba=%p not equal to phba=%p\n", |
6733b39a JK |
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; | |
457ff3b7 | 207 | SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n", |
6733b39a JK |
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"); | |
d3ad2bb3 | 233 | return -ENODEV; |
6733b39a JK |
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 | 279 | break; |
42f43c41 JK |
280 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
281 | if ((conn->max_xmit_dlength > 65536) || | |
282 | (conn->max_xmit_dlength == 0)) | |
283 | conn->max_xmit_dlength = 65536; | |
6733b39a JK |
284 | default: |
285 | return 0; | |
286 | } | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
291 | /** | |
292 | * beiscsi_get_host_param - get the iscsi parameter | |
293 | * @shost: pointer to scsi_host structure | |
294 | * @param: parameter type identifier | |
295 | * @buf: buffer pointer | |
296 | * | |
297 | * returns host parameter | |
298 | */ | |
299 | int beiscsi_get_host_param(struct Scsi_Host *shost, | |
300 | enum iscsi_host_param param, char *buf) | |
301 | { | |
302 | struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); | |
b15d05b0 | 303 | int status = 0; |
6733b39a | 304 | |
756d29c8 | 305 | SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); |
6733b39a JK |
306 | switch (param) { |
307 | case ISCSI_HOST_PARAM_HWADDRESS: | |
c7acc5b8 JK |
308 | status = beiscsi_get_macaddr(buf, phba); |
309 | if (status < 0) { | |
310 | SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n"); | |
311 | return status; | |
756d29c8 | 312 | } |
6733b39a JK |
313 | break; |
314 | default: | |
315 | return iscsi_host_get_param(shost, param, buf); | |
316 | } | |
b15d05b0 | 317 | return status; |
6733b39a JK |
318 | } |
319 | ||
c7acc5b8 JK |
320 | int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) |
321 | { | |
322 | struct be_cmd_resp_get_mac_addr *resp; | |
323 | struct be_mcc_wrb *wrb; | |
324 | unsigned int tag, wrb_num; | |
325 | unsigned short status, extd_status; | |
326 | struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; | |
327 | int rc; | |
328 | ||
329 | if (phba->read_mac_address) | |
330 | return sysfs_format_mac(buf, phba->mac_address, | |
331 | ETH_ALEN); | |
332 | ||
333 | tag = be_cmd_get_mac_addr(phba); | |
334 | if (!tag) { | |
335 | SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n"); | |
336 | return -EBUSY; | |
337 | } else | |
338 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
339 | phba->ctrl.mcc_numtag[tag]); | |
340 | ||
341 | wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; | |
342 | extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; | |
343 | status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; | |
344 | if (status || extd_status) { | |
345 | SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr" | |
346 | " status = %d extd_status = %d\n", | |
347 | status, extd_status); | |
348 | free_mcc_tag(&phba->ctrl, tag); | |
349 | return -EAGAIN; | |
350 | } | |
351 | wrb = queue_get_wrb(mccq, wrb_num); | |
352 | free_mcc_tag(&phba->ctrl, tag); | |
353 | resp = embedded_payload(wrb); | |
354 | memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); | |
355 | rc = sysfs_format_mac(buf, phba->mac_address, | |
356 | ETH_ALEN); | |
357 | phba->read_mac_address = 1; | |
358 | return rc; | |
359 | } | |
360 | ||
361 | ||
6733b39a JK |
362 | /** |
363 | * beiscsi_conn_get_stats - get the iscsi stats | |
364 | * @cls_conn: pointer to iscsi cls conn | |
365 | * @stats: pointer to iscsi_stats structure | |
366 | * | |
367 | * returns iscsi stats | |
368 | */ | |
369 | void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, | |
370 | struct iscsi_stats *stats) | |
371 | { | |
372 | struct iscsi_conn *conn = cls_conn->dd_data; | |
373 | ||
374 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); | |
375 | stats->txdata_octets = conn->txdata_octets; | |
376 | stats->rxdata_octets = conn->rxdata_octets; | |
377 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
378 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
379 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
380 | stats->datain_pdus = conn->datain_pdus_cnt; | |
381 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
382 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
383 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
384 | stats->digest_err = 0; | |
385 | stats->timeout_err = 0; | |
386 | stats->custom_length = 0; | |
387 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); | |
388 | stats->custom[0].value = conn->eh_abort_cnt; | |
389 | } | |
390 | ||
391 | /** | |
392 | * beiscsi_set_params_for_offld - get the parameters for offload | |
393 | * @beiscsi_conn: pointer to beiscsi_conn | |
394 | * @params: pointer to offload_params structure | |
395 | */ | |
396 | static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, | |
397 | struct beiscsi_offload_params *params) | |
398 | { | |
399 | struct iscsi_conn *conn = beiscsi_conn->conn; | |
400 | struct iscsi_session *session = conn->session; | |
401 | ||
402 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, | |
403 | params, session->max_burst); | |
404 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, | |
405 | max_send_data_segment_length, params, | |
406 | conn->max_xmit_dlength); | |
407 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, | |
408 | params, session->first_burst); | |
409 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, | |
410 | session->erl); | |
411 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, | |
412 | conn->datadgst_en); | |
413 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, | |
414 | conn->hdrdgst_en); | |
415 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, | |
416 | session->initial_r2t_en); | |
417 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, | |
418 | session->imm_data_en); | |
419 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, | |
420 | (conn->exp_statsn - 1)); | |
421 | } | |
422 | ||
423 | /** | |
424 | * beiscsi_conn_start - offload of session to chip | |
425 | * @cls_conn: pointer to beiscsi_conn | |
426 | */ | |
427 | int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) | |
428 | { | |
429 | struct iscsi_conn *conn = cls_conn->dd_data; | |
430 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; | |
431 | struct beiscsi_endpoint *beiscsi_ep; | |
432 | struct beiscsi_offload_params params; | |
6733b39a | 433 | |
756d29c8 | 434 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); |
6733b39a JK |
435 | memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); |
436 | beiscsi_ep = beiscsi_conn->ep; | |
437 | if (!beiscsi_ep) | |
438 | SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); | |
439 | ||
6733b39a JK |
440 | beiscsi_conn->login_in_progress = 0; |
441 | beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); | |
442 | beiscsi_offload_connection(beiscsi_conn, ¶ms); | |
443 | iscsi_conn_start(cls_conn); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | /** | |
448 | * beiscsi_get_cid - Allocate a cid | |
449 | * @phba: The phba instance | |
450 | */ | |
451 | static int beiscsi_get_cid(struct beiscsi_hba *phba) | |
452 | { | |
453 | unsigned short cid = 0xFFFF; | |
454 | ||
455 | if (!phba->avlbl_cids) | |
456 | return cid; | |
457 | ||
458 | cid = phba->cid_array[phba->cid_alloc++]; | |
459 | if (phba->cid_alloc == phba->params.cxns_per_ctrl) | |
460 | phba->cid_alloc = 0; | |
461 | phba->avlbl_cids--; | |
462 | return cid; | |
463 | } | |
464 | ||
fa95d206 MC |
465 | /** |
466 | * beiscsi_put_cid - Free the cid | |
467 | * @phba: The phba for which the cid is being freed | |
468 | * @cid: The cid to free | |
469 | */ | |
470 | static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) | |
471 | { | |
472 | phba->avlbl_cids++; | |
473 | phba->cid_array[phba->cid_free++] = cid; | |
474 | if (phba->cid_free == phba->params.cxns_per_ctrl) | |
475 | phba->cid_free = 0; | |
476 | } | |
477 | ||
478 | /** | |
479 | * beiscsi_free_ep - free endpoint | |
480 | * @ep: pointer to iscsi endpoint structure | |
481 | */ | |
482 | static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) | |
483 | { | |
484 | struct beiscsi_hba *phba = beiscsi_ep->phba; | |
485 | ||
486 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); | |
487 | beiscsi_ep->phba = NULL; | |
488 | } | |
489 | ||
6733b39a JK |
490 | /** |
491 | * beiscsi_open_conn - Ask FW to open a TCP connection | |
492 | * @ep: endpoint to be used | |
493 | * @src_addr: The source IP address | |
494 | * @dst_addr: The Destination IP address | |
495 | * | |
496 | * Asks the FW to open a TCP connection | |
497 | */ | |
498 | static int beiscsi_open_conn(struct iscsi_endpoint *ep, | |
499 | struct sockaddr *src_addr, | |
500 | struct sockaddr *dst_addr, int non_blocking) | |
501 | { | |
502 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; | |
503 | struct beiscsi_hba *phba = beiscsi_ep->phba; | |
756d29c8 JK |
504 | struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; |
505 | struct be_mcc_wrb *wrb; | |
506 | struct tcp_connect_and_offload_out *ptcpcnct_out; | |
507 | unsigned short status, extd_status; | |
3cbb7a74 | 508 | struct be_dma_mem nonemb_cmd; |
756d29c8 | 509 | unsigned int tag, wrb_num; |
d3ad2bb3 | 510 | int ret = -ENOMEM; |
6733b39a | 511 | |
756d29c8 | 512 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); |
6733b39a JK |
513 | beiscsi_ep->ep_cid = beiscsi_get_cid(phba); |
514 | if (beiscsi_ep->ep_cid == 0xFFFF) { | |
515 | SE_DEBUG(DBG_LVL_1, "No free cid available\n"); | |
516 | return ret; | |
517 | } | |
457ff3b7 | 518 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n", |
6733b39a | 519 | beiscsi_ep->ep_cid); |
7da50879 JK |
520 | phba->ep_array[beiscsi_ep->ep_cid - |
521 | phba->fw_config.iscsi_cid_start] = ep; | |
522 | if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + | |
523 | phba->params.cxns_per_ctrl * 2)) { | |
6733b39a | 524 | SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); |
fa95d206 | 525 | goto free_ep; |
6733b39a JK |
526 | } |
527 | ||
528 | beiscsi_ep->cid_vld = 0; | |
3cbb7a74 JK |
529 | nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev, |
530 | sizeof(struct tcp_connect_and_offload_in), | |
531 | &nonemb_cmd.dma); | |
532 | if (nonemb_cmd.va == NULL) { | |
533 | SE_DEBUG(DBG_LVL_1, | |
534 | "Failed to allocate memory for mgmt_open_connection" | |
535 | "\n"); | |
536 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); | |
537 | return -ENOMEM; | |
538 | } | |
539 | nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in); | |
540 | memset(nonemb_cmd.va, 0, nonemb_cmd.size); | |
541 | tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); | |
756d29c8 JK |
542 | if (!tag) { |
543 | SE_DEBUG(DBG_LVL_1, | |
457ff3b7 | 544 | "mgmt_open_connection Failed for cid=%d\n", |
756d29c8 | 545 | beiscsi_ep->ep_cid); |
1f92638f | 546 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); |
3cbb7a74 JK |
547 | pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, |
548 | nonemb_cmd.va, nonemb_cmd.dma); | |
1f92638f | 549 | return -EAGAIN; |
756d29c8 JK |
550 | } else { |
551 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
552 | phba->ctrl.mcc_numtag[tag]); | |
553 | } | |
554 | wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; | |
555 | extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; | |
556 | status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; | |
557 | if (status || extd_status) { | |
558 | SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" | |
fa95d206 | 559 | " status = %d extd_status = %d\n", |
756d29c8 JK |
560 | status, extd_status); |
561 | free_mcc_tag(&phba->ctrl, tag); | |
3cbb7a74 JK |
562 | pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, |
563 | nonemb_cmd.va, nonemb_cmd.dma); | |
fa95d206 | 564 | goto free_ep; |
756d29c8 JK |
565 | } else { |
566 | wrb = queue_get_wrb(mccq, wrb_num); | |
567 | free_mcc_tag(&phba->ctrl, tag); | |
568 | ||
457ff3b7 | 569 | ptcpcnct_out = embedded_payload(wrb); |
756d29c8 JK |
570 | beiscsi_ep = ep->dd_data; |
571 | beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; | |
572 | beiscsi_ep->cid_vld = 1; | |
573 | SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); | |
574 | } | |
3cbb7a74 JK |
575 | pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, |
576 | nonemb_cmd.va, nonemb_cmd.dma); | |
756d29c8 | 577 | return 0; |
6733b39a | 578 | |
fa95d206 MC |
579 | free_ep: |
580 | beiscsi_free_ep(beiscsi_ep); | |
d3ad2bb3 | 581 | return -EBUSY; |
6733b39a JK |
582 | } |
583 | ||
584 | /** | |
585 | * beiscsi_ep_connect - Ask chip to create TCP Conn | |
586 | * @scsi_host: Pointer to scsi_host structure | |
587 | * @dst_addr: The IP address of Target | |
588 | * @non_blocking: blocking or non-blocking call | |
589 | * | |
590 | * This routines first asks chip to create a connection and then allocates an EP | |
591 | */ | |
592 | struct iscsi_endpoint * | |
593 | beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, | |
594 | int non_blocking) | |
595 | { | |
596 | struct beiscsi_hba *phba; | |
597 | struct beiscsi_endpoint *beiscsi_ep; | |
598 | struct iscsi_endpoint *ep; | |
599 | int ret; | |
600 | ||
457ff3b7 | 601 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n"); |
6733b39a JK |
602 | if (shost) |
603 | phba = iscsi_host_priv(shost); | |
604 | else { | |
605 | ret = -ENXIO; | |
457ff3b7 | 606 | SE_DEBUG(DBG_LVL_1, "shost is NULL\n"); |
6733b39a JK |
607 | return ERR_PTR(ret); |
608 | } | |
bfead3b2 | 609 | |
5dc1c416 | 610 | if (phba->state != BE_ADAPTER_UP) { |
bfead3b2 | 611 | ret = -EBUSY; |
457ff3b7 | 612 | SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n"); |
bfead3b2 JK |
613 | return ERR_PTR(ret); |
614 | } | |
615 | ||
6733b39a JK |
616 | ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); |
617 | if (!ep) { | |
618 | ret = -ENOMEM; | |
619 | return ERR_PTR(ret); | |
620 | } | |
621 | ||
622 | beiscsi_ep = ep->dd_data; | |
623 | beiscsi_ep->phba = phba; | |
c2462288 | 624 | beiscsi_ep->openiscsi_ep = ep; |
f5ed7bd4 JK |
625 | ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); |
626 | if (ret) { | |
457ff3b7 | 627 | SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n"); |
6733b39a JK |
628 | goto free_ep; |
629 | } | |
630 | ||
631 | return ep; | |
632 | ||
633 | free_ep: | |
fa95d206 | 634 | iscsi_destroy_endpoint(ep); |
6733b39a JK |
635 | return ERR_PTR(ret); |
636 | } | |
637 | ||
638 | /** | |
639 | * beiscsi_ep_poll - Poll to see if connection is established | |
640 | * @ep: endpoint to be used | |
641 | * @timeout_ms: timeout specified in millisecs | |
642 | * | |
643 | * Poll to see if TCP connection established | |
644 | */ | |
645 | int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
646 | { | |
647 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; | |
648 | ||
649 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); | |
650 | if (beiscsi_ep->cid_vld == 1) | |
651 | return 1; | |
652 | else | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /** | |
657 | * beiscsi_close_conn - Upload the connection | |
658 | * @ep: The iscsi endpoint | |
659 | * @flag: The type of connection closure | |
660 | */ | |
c2462288 | 661 | static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) |
6733b39a JK |
662 | { |
663 | int ret = 0; | |
756d29c8 | 664 | unsigned int tag; |
6733b39a JK |
665 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
666 | ||
756d29c8 JK |
667 | tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); |
668 | if (!tag) { | |
457ff3b7 | 669 | SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n", |
6733b39a | 670 | beiscsi_ep->ep_cid); |
d3ad2bb3 | 671 | ret = -EAGAIN; |
756d29c8 JK |
672 | } else { |
673 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
674 | phba->ctrl.mcc_numtag[tag]); | |
675 | free_mcc_tag(&phba->ctrl, tag); | |
6733b39a | 676 | } |
6733b39a JK |
677 | return ret; |
678 | } | |
679 | ||
6733b39a JK |
680 | /** |
681 | * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table | |
682 | * @phba: The phba instance | |
683 | * @cid: The cid to free | |
684 | */ | |
685 | static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, | |
686 | unsigned int cid) | |
687 | { | |
688 | if (phba->conn_table[cid]) | |
689 | phba->conn_table[cid] = NULL; | |
690 | else { | |
457ff3b7 | 691 | SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n"); |
6733b39a JK |
692 | return -EINVAL; |
693 | } | |
694 | return 0; | |
695 | } | |
696 | ||
697 | /** | |
fa95d206 MC |
698 | * beiscsi_ep_disconnect - Tears down the TCP connection |
699 | * @ep: endpoint to be used | |
700 | * | |
701 | * Tears down the TCP connection | |
6733b39a | 702 | */ |
fa95d206 | 703 | void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) |
6733b39a | 704 | { |
fa95d206 | 705 | struct beiscsi_conn *beiscsi_conn; |
6733b39a | 706 | struct beiscsi_endpoint *beiscsi_ep; |
fa95d206 | 707 | struct beiscsi_hba *phba; |
756d29c8 | 708 | unsigned int tag; |
6733b39a JK |
709 | unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; |
710 | ||
fa95d206 MC |
711 | beiscsi_ep = ep->dd_data; |
712 | phba = beiscsi_ep->phba; | |
713 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", | |
714 | beiscsi_ep->ep_cid); | |
715 | ||
716 | if (!beiscsi_ep->conn) { | |
717 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no " | |
718 | "beiscsi_ep\n"); | |
6733b39a JK |
719 | return; |
720 | } | |
fa95d206 MC |
721 | beiscsi_conn = beiscsi_ep->conn; |
722 | iscsi_suspend_queue(beiscsi_conn->conn); | |
723 | ||
724 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n", | |
725 | beiscsi_ep->ep_cid); | |
726 | ||
756d29c8 | 727 | tag = mgmt_invalidate_connection(phba, beiscsi_ep, |
6733b39a JK |
728 | beiscsi_ep->ep_cid, 1, |
729 | savecfg_flag); | |
756d29c8 | 730 | if (!tag) { |
6733b39a | 731 | SE_DEBUG(DBG_LVL_1, |
457ff3b7 | 732 | "mgmt_invalidate_connection Failed for cid=%d\n", |
90a289e8 | 733 | beiscsi_ep->ep_cid); |
756d29c8 JK |
734 | } else { |
735 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
736 | phba->ctrl.mcc_numtag[tag]); | |
737 | free_mcc_tag(&phba->ctrl, tag); | |
6733b39a | 738 | } |
fa95d206 | 739 | |
c2462288 JK |
740 | beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); |
741 | beiscsi_free_ep(beiscsi_ep); | |
6733b39a | 742 | beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); |
fa95d206 | 743 | iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); |
6733b39a | 744 | } |