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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 | /** | |
c7f7fd5b MC |
213 | * beiscsi_ep_get_param - get the iscsi parameter |
214 | * @ep: pointer to iscsi ep | |
6733b39a JK |
215 | * @param: parameter type identifier |
216 | * @buf: buffer pointer | |
217 | * | |
218 | * returns iscsi parameter | |
219 | */ | |
c7f7fd5b | 220 | int beiscsi_ep_get_param(struct iscsi_endpoint *ep, |
6733b39a JK |
221 | enum iscsi_param param, char *buf) |
222 | { | |
c7f7fd5b | 223 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
6733b39a JK |
224 | int len = 0; |
225 | ||
756d29c8 | 226 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param); |
6733b39a JK |
227 | |
228 | switch (param) { | |
229 | case ISCSI_PARAM_CONN_PORT: | |
230 | len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); | |
231 | break; | |
232 | case ISCSI_PARAM_CONN_ADDRESS: | |
233 | if (beiscsi_ep->ip_type == BE2_IPV4) | |
234 | len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); | |
235 | else | |
236 | len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); | |
237 | break; | |
238 | default: | |
c7f7fd5b | 239 | return -ENOSYS; |
6733b39a JK |
240 | } |
241 | return len; | |
242 | } | |
243 | ||
244 | int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, | |
245 | enum iscsi_param param, char *buf, int buflen) | |
246 | { | |
247 | struct iscsi_conn *conn = cls_conn->dd_data; | |
248 | struct iscsi_session *session = conn->session; | |
249 | int ret; | |
250 | ||
756d29c8 | 251 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param); |
6733b39a JK |
252 | ret = iscsi_set_param(cls_conn, param, buf, buflen); |
253 | if (ret) | |
254 | return ret; | |
255 | /* | |
256 | * If userspace tried to set the value to higher than we can | |
257 | * support override here. | |
258 | */ | |
259 | switch (param) { | |
260 | case ISCSI_PARAM_FIRST_BURST: | |
261 | if (session->first_burst > 8192) | |
262 | session->first_burst = 8192; | |
263 | break; | |
264 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
265 | if (conn->max_recv_dlength > 65536) | |
266 | conn->max_recv_dlength = 65536; | |
267 | break; | |
268 | case ISCSI_PARAM_MAX_BURST: | |
230dceb4 JK |
269 | if (session->max_burst > 262144) |
270 | session->max_burst = 262144; | |
6733b39a | 271 | break; |
42f43c41 JK |
272 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
273 | if ((conn->max_xmit_dlength > 65536) || | |
274 | (conn->max_xmit_dlength == 0)) | |
275 | conn->max_xmit_dlength = 65536; | |
6733b39a JK |
276 | default: |
277 | return 0; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | /** | |
284 | * beiscsi_get_host_param - get the iscsi parameter | |
285 | * @shost: pointer to scsi_host structure | |
286 | * @param: parameter type identifier | |
287 | * @buf: buffer pointer | |
288 | * | |
289 | * returns host parameter | |
290 | */ | |
291 | int beiscsi_get_host_param(struct Scsi_Host *shost, | |
292 | enum iscsi_host_param param, char *buf) | |
293 | { | |
294 | struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); | |
b15d05b0 | 295 | int status = 0; |
6733b39a | 296 | |
756d29c8 | 297 | SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); |
6733b39a JK |
298 | switch (param) { |
299 | case ISCSI_HOST_PARAM_HWADDRESS: | |
c7acc5b8 JK |
300 | status = beiscsi_get_macaddr(buf, phba); |
301 | if (status < 0) { | |
302 | SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n"); | |
303 | return status; | |
756d29c8 | 304 | } |
6733b39a JK |
305 | break; |
306 | default: | |
307 | return iscsi_host_get_param(shost, param, buf); | |
308 | } | |
b15d05b0 | 309 | return status; |
6733b39a JK |
310 | } |
311 | ||
c7acc5b8 JK |
312 | int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) |
313 | { | |
314 | struct be_cmd_resp_get_mac_addr *resp; | |
315 | struct be_mcc_wrb *wrb; | |
316 | unsigned int tag, wrb_num; | |
317 | unsigned short status, extd_status; | |
318 | struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; | |
319 | int rc; | |
320 | ||
321 | if (phba->read_mac_address) | |
322 | return sysfs_format_mac(buf, phba->mac_address, | |
323 | ETH_ALEN); | |
324 | ||
325 | tag = be_cmd_get_mac_addr(phba); | |
326 | if (!tag) { | |
327 | SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n"); | |
328 | return -EBUSY; | |
329 | } else | |
330 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
331 | phba->ctrl.mcc_numtag[tag]); | |
332 | ||
333 | wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; | |
334 | extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; | |
335 | status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; | |
336 | if (status || extd_status) { | |
337 | SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr" | |
338 | " status = %d extd_status = %d\n", | |
339 | status, extd_status); | |
340 | free_mcc_tag(&phba->ctrl, tag); | |
341 | return -EAGAIN; | |
342 | } | |
343 | wrb = queue_get_wrb(mccq, wrb_num); | |
344 | free_mcc_tag(&phba->ctrl, tag); | |
345 | resp = embedded_payload(wrb); | |
346 | memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); | |
347 | rc = sysfs_format_mac(buf, phba->mac_address, | |
348 | ETH_ALEN); | |
349 | phba->read_mac_address = 1; | |
350 | return rc; | |
351 | } | |
352 | ||
353 | ||
6733b39a JK |
354 | /** |
355 | * beiscsi_conn_get_stats - get the iscsi stats | |
356 | * @cls_conn: pointer to iscsi cls conn | |
357 | * @stats: pointer to iscsi_stats structure | |
358 | * | |
359 | * returns iscsi stats | |
360 | */ | |
361 | void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, | |
362 | struct iscsi_stats *stats) | |
363 | { | |
364 | struct iscsi_conn *conn = cls_conn->dd_data; | |
365 | ||
366 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); | |
367 | stats->txdata_octets = conn->txdata_octets; | |
368 | stats->rxdata_octets = conn->rxdata_octets; | |
369 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
370 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
371 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
372 | stats->datain_pdus = conn->datain_pdus_cnt; | |
373 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
374 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
375 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
376 | stats->digest_err = 0; | |
377 | stats->timeout_err = 0; | |
378 | stats->custom_length = 0; | |
379 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); | |
380 | stats->custom[0].value = conn->eh_abort_cnt; | |
381 | } | |
382 | ||
383 | /** | |
384 | * beiscsi_set_params_for_offld - get the parameters for offload | |
385 | * @beiscsi_conn: pointer to beiscsi_conn | |
386 | * @params: pointer to offload_params structure | |
387 | */ | |
388 | static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, | |
389 | struct beiscsi_offload_params *params) | |
390 | { | |
391 | struct iscsi_conn *conn = beiscsi_conn->conn; | |
392 | struct iscsi_session *session = conn->session; | |
393 | ||
394 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, | |
395 | params, session->max_burst); | |
396 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, | |
397 | max_send_data_segment_length, params, | |
398 | conn->max_xmit_dlength); | |
399 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, | |
400 | params, session->first_burst); | |
401 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, | |
402 | session->erl); | |
403 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, | |
404 | conn->datadgst_en); | |
405 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, | |
406 | conn->hdrdgst_en); | |
407 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, | |
408 | session->initial_r2t_en); | |
409 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, | |
410 | session->imm_data_en); | |
411 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, | |
412 | (conn->exp_statsn - 1)); | |
413 | } | |
414 | ||
415 | /** | |
416 | * beiscsi_conn_start - offload of session to chip | |
417 | * @cls_conn: pointer to beiscsi_conn | |
418 | */ | |
419 | int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) | |
420 | { | |
421 | struct iscsi_conn *conn = cls_conn->dd_data; | |
422 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; | |
423 | struct beiscsi_endpoint *beiscsi_ep; | |
424 | struct beiscsi_offload_params params; | |
6733b39a | 425 | |
756d29c8 | 426 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); |
6733b39a JK |
427 | memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); |
428 | beiscsi_ep = beiscsi_conn->ep; | |
429 | if (!beiscsi_ep) | |
430 | SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); | |
431 | ||
6733b39a JK |
432 | beiscsi_conn->login_in_progress = 0; |
433 | beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); | |
434 | beiscsi_offload_connection(beiscsi_conn, ¶ms); | |
435 | iscsi_conn_start(cls_conn); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /** | |
440 | * beiscsi_get_cid - Allocate a cid | |
441 | * @phba: The phba instance | |
442 | */ | |
443 | static int beiscsi_get_cid(struct beiscsi_hba *phba) | |
444 | { | |
445 | unsigned short cid = 0xFFFF; | |
446 | ||
447 | if (!phba->avlbl_cids) | |
448 | return cid; | |
449 | ||
450 | cid = phba->cid_array[phba->cid_alloc++]; | |
451 | if (phba->cid_alloc == phba->params.cxns_per_ctrl) | |
452 | phba->cid_alloc = 0; | |
453 | phba->avlbl_cids--; | |
454 | return cid; | |
455 | } | |
456 | ||
fa95d206 MC |
457 | /** |
458 | * beiscsi_put_cid - Free the cid | |
459 | * @phba: The phba for which the cid is being freed | |
460 | * @cid: The cid to free | |
461 | */ | |
462 | static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) | |
463 | { | |
464 | phba->avlbl_cids++; | |
465 | phba->cid_array[phba->cid_free++] = cid; | |
466 | if (phba->cid_free == phba->params.cxns_per_ctrl) | |
467 | phba->cid_free = 0; | |
468 | } | |
469 | ||
470 | /** | |
471 | * beiscsi_free_ep - free endpoint | |
472 | * @ep: pointer to iscsi endpoint structure | |
473 | */ | |
474 | static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) | |
475 | { | |
476 | struct beiscsi_hba *phba = beiscsi_ep->phba; | |
477 | ||
478 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); | |
479 | beiscsi_ep->phba = NULL; | |
480 | } | |
481 | ||
6733b39a JK |
482 | /** |
483 | * beiscsi_open_conn - Ask FW to open a TCP connection | |
484 | * @ep: endpoint to be used | |
485 | * @src_addr: The source IP address | |
486 | * @dst_addr: The Destination IP address | |
487 | * | |
488 | * Asks the FW to open a TCP connection | |
489 | */ | |
490 | static int beiscsi_open_conn(struct iscsi_endpoint *ep, | |
491 | struct sockaddr *src_addr, | |
492 | struct sockaddr *dst_addr, int non_blocking) | |
493 | { | |
494 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; | |
495 | struct beiscsi_hba *phba = beiscsi_ep->phba; | |
756d29c8 JK |
496 | struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; |
497 | struct be_mcc_wrb *wrb; | |
498 | struct tcp_connect_and_offload_out *ptcpcnct_out; | |
499 | unsigned short status, extd_status; | |
3cbb7a74 | 500 | struct be_dma_mem nonemb_cmd; |
756d29c8 | 501 | unsigned int tag, wrb_num; |
d3ad2bb3 | 502 | int ret = -ENOMEM; |
6733b39a | 503 | |
756d29c8 | 504 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); |
6733b39a JK |
505 | beiscsi_ep->ep_cid = beiscsi_get_cid(phba); |
506 | if (beiscsi_ep->ep_cid == 0xFFFF) { | |
507 | SE_DEBUG(DBG_LVL_1, "No free cid available\n"); | |
508 | return ret; | |
509 | } | |
457ff3b7 | 510 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n", |
6733b39a | 511 | beiscsi_ep->ep_cid); |
7da50879 JK |
512 | phba->ep_array[beiscsi_ep->ep_cid - |
513 | phba->fw_config.iscsi_cid_start] = ep; | |
514 | if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + | |
515 | phba->params.cxns_per_ctrl * 2)) { | |
6733b39a | 516 | SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); |
fa95d206 | 517 | goto free_ep; |
6733b39a JK |
518 | } |
519 | ||
520 | beiscsi_ep->cid_vld = 0; | |
3cbb7a74 JK |
521 | nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev, |
522 | sizeof(struct tcp_connect_and_offload_in), | |
523 | &nonemb_cmd.dma); | |
524 | if (nonemb_cmd.va == NULL) { | |
525 | SE_DEBUG(DBG_LVL_1, | |
526 | "Failed to allocate memory for mgmt_open_connection" | |
527 | "\n"); | |
528 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); | |
529 | return -ENOMEM; | |
530 | } | |
531 | nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in); | |
532 | memset(nonemb_cmd.va, 0, nonemb_cmd.size); | |
533 | tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); | |
756d29c8 JK |
534 | if (!tag) { |
535 | SE_DEBUG(DBG_LVL_1, | |
457ff3b7 | 536 | "mgmt_open_connection Failed for cid=%d\n", |
756d29c8 | 537 | beiscsi_ep->ep_cid); |
1f92638f | 538 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); |
3cbb7a74 JK |
539 | pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, |
540 | nonemb_cmd.va, nonemb_cmd.dma); | |
1f92638f | 541 | return -EAGAIN; |
756d29c8 JK |
542 | } else { |
543 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
544 | phba->ctrl.mcc_numtag[tag]); | |
545 | } | |
546 | wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; | |
547 | extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; | |
548 | status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; | |
549 | if (status || extd_status) { | |
550 | SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" | |
fa95d206 | 551 | " status = %d extd_status = %d\n", |
756d29c8 JK |
552 | status, extd_status); |
553 | free_mcc_tag(&phba->ctrl, tag); | |
3cbb7a74 JK |
554 | pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, |
555 | nonemb_cmd.va, nonemb_cmd.dma); | |
fa95d206 | 556 | goto free_ep; |
756d29c8 JK |
557 | } else { |
558 | wrb = queue_get_wrb(mccq, wrb_num); | |
559 | free_mcc_tag(&phba->ctrl, tag); | |
560 | ||
457ff3b7 | 561 | ptcpcnct_out = embedded_payload(wrb); |
756d29c8 JK |
562 | beiscsi_ep = ep->dd_data; |
563 | beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; | |
564 | beiscsi_ep->cid_vld = 1; | |
565 | SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); | |
566 | } | |
3cbb7a74 JK |
567 | pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, |
568 | nonemb_cmd.va, nonemb_cmd.dma); | |
756d29c8 | 569 | return 0; |
6733b39a | 570 | |
fa95d206 MC |
571 | free_ep: |
572 | beiscsi_free_ep(beiscsi_ep); | |
d3ad2bb3 | 573 | return -EBUSY; |
6733b39a JK |
574 | } |
575 | ||
576 | /** | |
577 | * beiscsi_ep_connect - Ask chip to create TCP Conn | |
578 | * @scsi_host: Pointer to scsi_host structure | |
579 | * @dst_addr: The IP address of Target | |
580 | * @non_blocking: blocking or non-blocking call | |
581 | * | |
582 | * This routines first asks chip to create a connection and then allocates an EP | |
583 | */ | |
584 | struct iscsi_endpoint * | |
585 | beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, | |
586 | int non_blocking) | |
587 | { | |
588 | struct beiscsi_hba *phba; | |
589 | struct beiscsi_endpoint *beiscsi_ep; | |
590 | struct iscsi_endpoint *ep; | |
591 | int ret; | |
592 | ||
457ff3b7 | 593 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n"); |
6733b39a JK |
594 | if (shost) |
595 | phba = iscsi_host_priv(shost); | |
596 | else { | |
597 | ret = -ENXIO; | |
457ff3b7 | 598 | SE_DEBUG(DBG_LVL_1, "shost is NULL\n"); |
6733b39a JK |
599 | return ERR_PTR(ret); |
600 | } | |
bfead3b2 | 601 | |
5dc1c416 | 602 | if (phba->state != BE_ADAPTER_UP) { |
bfead3b2 | 603 | ret = -EBUSY; |
457ff3b7 | 604 | SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n"); |
bfead3b2 JK |
605 | return ERR_PTR(ret); |
606 | } | |
607 | ||
6733b39a JK |
608 | ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); |
609 | if (!ep) { | |
610 | ret = -ENOMEM; | |
611 | return ERR_PTR(ret); | |
612 | } | |
613 | ||
614 | beiscsi_ep = ep->dd_data; | |
615 | beiscsi_ep->phba = phba; | |
c2462288 | 616 | beiscsi_ep->openiscsi_ep = ep; |
f5ed7bd4 JK |
617 | ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); |
618 | if (ret) { | |
457ff3b7 | 619 | SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n"); |
6733b39a JK |
620 | goto free_ep; |
621 | } | |
622 | ||
623 | return ep; | |
624 | ||
625 | free_ep: | |
fa95d206 | 626 | iscsi_destroy_endpoint(ep); |
6733b39a JK |
627 | return ERR_PTR(ret); |
628 | } | |
629 | ||
630 | /** | |
631 | * beiscsi_ep_poll - Poll to see if connection is established | |
632 | * @ep: endpoint to be used | |
633 | * @timeout_ms: timeout specified in millisecs | |
634 | * | |
635 | * Poll to see if TCP connection established | |
636 | */ | |
637 | int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
638 | { | |
639 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; | |
640 | ||
641 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); | |
642 | if (beiscsi_ep->cid_vld == 1) | |
643 | return 1; | |
644 | else | |
645 | return 0; | |
646 | } | |
647 | ||
648 | /** | |
649 | * beiscsi_close_conn - Upload the connection | |
650 | * @ep: The iscsi endpoint | |
651 | * @flag: The type of connection closure | |
652 | */ | |
c2462288 | 653 | static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) |
6733b39a JK |
654 | { |
655 | int ret = 0; | |
756d29c8 | 656 | unsigned int tag; |
6733b39a JK |
657 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
658 | ||
756d29c8 JK |
659 | tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); |
660 | if (!tag) { | |
457ff3b7 | 661 | SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n", |
6733b39a | 662 | beiscsi_ep->ep_cid); |
d3ad2bb3 | 663 | ret = -EAGAIN; |
756d29c8 JK |
664 | } else { |
665 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
666 | phba->ctrl.mcc_numtag[tag]); | |
667 | free_mcc_tag(&phba->ctrl, tag); | |
6733b39a | 668 | } |
6733b39a JK |
669 | return ret; |
670 | } | |
671 | ||
6733b39a JK |
672 | /** |
673 | * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table | |
674 | * @phba: The phba instance | |
675 | * @cid: The cid to free | |
676 | */ | |
677 | static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, | |
678 | unsigned int cid) | |
679 | { | |
680 | if (phba->conn_table[cid]) | |
681 | phba->conn_table[cid] = NULL; | |
682 | else { | |
457ff3b7 | 683 | SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n"); |
6733b39a JK |
684 | return -EINVAL; |
685 | } | |
686 | return 0; | |
687 | } | |
688 | ||
689 | /** | |
fa95d206 MC |
690 | * beiscsi_ep_disconnect - Tears down the TCP connection |
691 | * @ep: endpoint to be used | |
692 | * | |
693 | * Tears down the TCP connection | |
6733b39a | 694 | */ |
fa95d206 | 695 | void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) |
6733b39a | 696 | { |
fa95d206 | 697 | struct beiscsi_conn *beiscsi_conn; |
6733b39a | 698 | struct beiscsi_endpoint *beiscsi_ep; |
fa95d206 | 699 | struct beiscsi_hba *phba; |
756d29c8 | 700 | unsigned int tag; |
6733b39a JK |
701 | unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; |
702 | ||
fa95d206 MC |
703 | beiscsi_ep = ep->dd_data; |
704 | phba = beiscsi_ep->phba; | |
705 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", | |
706 | beiscsi_ep->ep_cid); | |
707 | ||
708 | if (!beiscsi_ep->conn) { | |
709 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no " | |
710 | "beiscsi_ep\n"); | |
6733b39a JK |
711 | return; |
712 | } | |
fa95d206 MC |
713 | beiscsi_conn = beiscsi_ep->conn; |
714 | iscsi_suspend_queue(beiscsi_conn->conn); | |
715 | ||
716 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n", | |
717 | beiscsi_ep->ep_cid); | |
718 | ||
756d29c8 | 719 | tag = mgmt_invalidate_connection(phba, beiscsi_ep, |
6733b39a JK |
720 | beiscsi_ep->ep_cid, 1, |
721 | savecfg_flag); | |
756d29c8 | 722 | if (!tag) { |
6733b39a | 723 | SE_DEBUG(DBG_LVL_1, |
457ff3b7 | 724 | "mgmt_invalidate_connection Failed for cid=%d\n", |
90a289e8 | 725 | beiscsi_ep->ep_cid); |
756d29c8 JK |
726 | } else { |
727 | wait_event_interruptible(phba->ctrl.mcc_wait[tag], | |
728 | phba->ctrl.mcc_numtag[tag]); | |
729 | free_mcc_tag(&phba->ctrl, tag); | |
6733b39a | 730 | } |
fa95d206 | 731 | |
c2462288 JK |
732 | beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); |
733 | beiscsi_free_ep(beiscsi_ep); | |
6733b39a | 734 | beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); |
fa95d206 | 735 | iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); |
6733b39a | 736 | } |