Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 1 | /** |
| 2 | * Copyright (C) 2005 - 2009 ServerEngines |
| 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; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 47 | struct beiscsi_hba *phba; |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 48 | struct iscsi_session *sess; |
| 49 | struct beiscsi_session *beiscsi_sess; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 50 | struct beiscsi_io_task *io_task; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 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 | |
| 70 | cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, |
| 71 | shost, cmds_max, |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 72 | sizeof(*beiscsi_sess), |
| 73 | sizeof(*io_task), |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 74 | initial_cmdsn, ISCSI_MAX_TARGET); |
| 75 | if (!cls_session) |
| 76 | return NULL; |
| 77 | sess = cls_session->dd_data; |
Jayamohan Kallickal | 2afc95b | 2009-09-22 08:22:26 +0530 | [diff] [blame] | 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; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 85 | |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 86 | return cls_session; |
Jayamohan Kallickal | 2afc95b | 2009-09-22 08:22:26 +0530 | [diff] [blame] | 87 | destroy_sess: |
| 88 | iscsi_session_teardown(cls_session); |
| 89 | return NULL; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 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 | { |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 101 | struct iscsi_session *sess = cls_session->dd_data; |
Jayamohan Kallickal | 2afc95b | 2009-09-22 08:22:26 +0530 | [diff] [blame] | 102 | struct beiscsi_session *beiscsi_sess = sess->dd_data; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 103 | |
Jayamohan Kallickal | 2afc95b | 2009-09-22 08:22:26 +0530 | [diff] [blame] | 104 | pci_pool_destroy(beiscsi_sess->bhs_pool); |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 105 | iscsi_session_teardown(cls_session); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * beiscsi_conn_create - create an instance of iscsi connection |
| 110 | * @cls_session: ptr to iscsi_cls_session |
| 111 | * @cid: iscsi cid |
| 112 | */ |
| 113 | struct iscsi_cls_conn * |
| 114 | beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) |
| 115 | { |
| 116 | struct beiscsi_hba *phba; |
| 117 | struct Scsi_Host *shost; |
| 118 | struct iscsi_cls_conn *cls_conn; |
| 119 | struct beiscsi_conn *beiscsi_conn; |
| 120 | struct iscsi_conn *conn; |
Jayamohan Kallickal | 2afc95b | 2009-09-22 08:22:26 +0530 | [diff] [blame] | 121 | struct iscsi_session *sess; |
| 122 | struct beiscsi_session *beiscsi_sess; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 123 | |
| 124 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid" |
| 125 | "from iscsi layer=%d\n", cid); |
| 126 | shost = iscsi_session_to_shost(cls_session); |
| 127 | phba = iscsi_host_priv(shost); |
| 128 | |
| 129 | cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); |
| 130 | if (!cls_conn) |
| 131 | return NULL; |
| 132 | |
| 133 | conn = cls_conn->dd_data; |
| 134 | beiscsi_conn = conn->dd_data; |
| 135 | beiscsi_conn->ep = NULL; |
| 136 | beiscsi_conn->phba = phba; |
| 137 | beiscsi_conn->conn = conn; |
Jayamohan Kallickal | 2afc95b | 2009-09-22 08:22:26 +0530 | [diff] [blame] | 138 | sess = cls_session->dd_data; |
| 139 | beiscsi_sess = sess->dd_data; |
| 140 | beiscsi_conn->beiscsi_sess = beiscsi_sess; |
Jayamohan Kallickal | 6733b39 | 2009-09-05 07:36:35 +0530 | [diff] [blame] | 141 | return cls_conn; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table |
| 146 | * @beiscsi_conn: The pointer to beiscsi_conn structure |
| 147 | * @phba: The phba instance |
| 148 | * @cid: The cid to free |
| 149 | */ |
| 150 | static int beiscsi_bindconn_cid(struct beiscsi_hba *phba, |
| 151 | struct beiscsi_conn *beiscsi_conn, |
| 152 | unsigned int cid) |
| 153 | { |
| 154 | if (phba->conn_table[cid]) { |
| 155 | SE_DEBUG(DBG_LVL_1, |
| 156 | "Connection table already occupied. Detected clash\n"); |
| 157 | return -EINVAL; |
| 158 | } else { |
| 159 | SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn) \n", |
| 160 | cid, beiscsi_conn); |
| 161 | phba->conn_table[cid] = beiscsi_conn; |
| 162 | } |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection |
| 168 | * @cls_session: pointer to iscsi cls session |
| 169 | * @cls_conn: pointer to iscsi cls conn |
| 170 | * @transport_fd: EP handle(64 bit) |
| 171 | * |
| 172 | * This function binds the TCP Conn with iSCSI Connection and Session. |
| 173 | */ |
| 174 | int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, |
| 175 | struct iscsi_cls_conn *cls_conn, |
| 176 | u64 transport_fd, int is_leading) |
| 177 | { |
| 178 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 179 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| 180 | struct Scsi_Host *shost = |
| 181 | (struct Scsi_Host *)iscsi_session_to_shost(cls_session); |
| 182 | struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); |
| 183 | struct beiscsi_endpoint *beiscsi_ep; |
| 184 | struct iscsi_endpoint *ep; |
| 185 | |
| 186 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n"); |
| 187 | ep = iscsi_lookup_endpoint(transport_fd); |
| 188 | if (!ep) |
| 189 | return -EINVAL; |
| 190 | |
| 191 | beiscsi_ep = ep->dd_data; |
| 192 | |
| 193 | if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) |
| 194 | return -EINVAL; |
| 195 | |
| 196 | if (beiscsi_ep->phba != phba) { |
| 197 | SE_DEBUG(DBG_LVL_8, |
| 198 | "beiscsi_ep->hba=%p not equal to phba=%p \n", |
| 199 | beiscsi_ep->phba, phba); |
| 200 | return -EEXIST; |
| 201 | } |
| 202 | |
| 203 | beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; |
| 204 | beiscsi_conn->ep = beiscsi_ep; |
| 205 | beiscsi_ep->conn = beiscsi_conn; |
| 206 | SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d \n", |
| 207 | beiscsi_conn, conn, beiscsi_ep->ep_cid); |
| 208 | return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid); |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * beiscsi_conn_get_param - get the iscsi parameter |
| 213 | * @cls_conn: pointer to iscsi cls conn |
| 214 | * @param: parameter type identifier |
| 215 | * @buf: buffer pointer |
| 216 | * |
| 217 | * returns iscsi parameter |
| 218 | */ |
| 219 | int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| 220 | enum iscsi_param param, char *buf) |
| 221 | { |
| 222 | struct beiscsi_endpoint *beiscsi_ep; |
| 223 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 224 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| 225 | int len = 0; |
| 226 | |
| 227 | beiscsi_ep = beiscsi_conn->ep; |
| 228 | if (!beiscsi_ep) { |
| 229 | SE_DEBUG(DBG_LVL_1, |
| 230 | "In beiscsi_conn_get_param , no beiscsi_ep\n"); |
| 231 | return -1; |
| 232 | } |
| 233 | |
| 234 | switch (param) { |
| 235 | case ISCSI_PARAM_CONN_PORT: |
| 236 | len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); |
| 237 | break; |
| 238 | case ISCSI_PARAM_CONN_ADDRESS: |
| 239 | if (beiscsi_ep->ip_type == BE2_IPV4) |
| 240 | len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); |
| 241 | else |
| 242 | len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); |
| 243 | break; |
| 244 | default: |
| 245 | return iscsi_conn_get_param(cls_conn, param, buf); |
| 246 | } |
| 247 | return len; |
| 248 | } |
| 249 | |
| 250 | int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, |
| 251 | enum iscsi_param param, char *buf, int buflen) |
| 252 | { |
| 253 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 254 | struct iscsi_session *session = conn->session; |
| 255 | int ret; |
| 256 | |
| 257 | ret = iscsi_set_param(cls_conn, param, buf, buflen); |
| 258 | if (ret) |
| 259 | return ret; |
| 260 | /* |
| 261 | * If userspace tried to set the value to higher than we can |
| 262 | * support override here. |
| 263 | */ |
| 264 | switch (param) { |
| 265 | case ISCSI_PARAM_FIRST_BURST: |
| 266 | if (session->first_burst > 8192) |
| 267 | session->first_burst = 8192; |
| 268 | break; |
| 269 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| 270 | if (conn->max_recv_dlength > 65536) |
| 271 | conn->max_recv_dlength = 65536; |
| 272 | break; |
| 273 | case ISCSI_PARAM_MAX_BURST: |
| 274 | if (session->first_burst > 262144) |
| 275 | session->first_burst = 262144; |
| 276 | break; |
| 277 | default: |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * beiscsi_get_host_param - get the iscsi parameter |
| 286 | * @shost: pointer to scsi_host structure |
| 287 | * @param: parameter type identifier |
| 288 | * @buf: buffer pointer |
| 289 | * |
| 290 | * returns host parameter |
| 291 | */ |
| 292 | int beiscsi_get_host_param(struct Scsi_Host *shost, |
| 293 | enum iscsi_host_param param, char *buf) |
| 294 | { |
| 295 | struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); |
| 296 | int len = 0; |
| 297 | |
| 298 | switch (param) { |
| 299 | case ISCSI_HOST_PARAM_HWADDRESS: |
| 300 | be_cmd_get_mac_addr(&phba->ctrl, phba->mac_address); |
| 301 | len = sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); |
| 302 | break; |
| 303 | default: |
| 304 | return iscsi_host_get_param(shost, param, buf); |
| 305 | } |
| 306 | return len; |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * beiscsi_conn_get_stats - get the iscsi stats |
| 311 | * @cls_conn: pointer to iscsi cls conn |
| 312 | * @stats: pointer to iscsi_stats structure |
| 313 | * |
| 314 | * returns iscsi stats |
| 315 | */ |
| 316 | void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
| 317 | struct iscsi_stats *stats) |
| 318 | { |
| 319 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 320 | |
| 321 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); |
| 322 | stats->txdata_octets = conn->txdata_octets; |
| 323 | stats->rxdata_octets = conn->rxdata_octets; |
| 324 | stats->dataout_pdus = conn->dataout_pdus_cnt; |
| 325 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; |
| 326 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; |
| 327 | stats->datain_pdus = conn->datain_pdus_cnt; |
| 328 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; |
| 329 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; |
| 330 | stats->r2t_pdus = conn->r2t_pdus_cnt; |
| 331 | stats->digest_err = 0; |
| 332 | stats->timeout_err = 0; |
| 333 | stats->custom_length = 0; |
| 334 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); |
| 335 | stats->custom[0].value = conn->eh_abort_cnt; |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * beiscsi_set_params_for_offld - get the parameters for offload |
| 340 | * @beiscsi_conn: pointer to beiscsi_conn |
| 341 | * @params: pointer to offload_params structure |
| 342 | */ |
| 343 | static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, |
| 344 | struct beiscsi_offload_params *params) |
| 345 | { |
| 346 | struct iscsi_conn *conn = beiscsi_conn->conn; |
| 347 | struct iscsi_session *session = conn->session; |
| 348 | |
| 349 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, |
| 350 | params, session->max_burst); |
| 351 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, |
| 352 | max_send_data_segment_length, params, |
| 353 | conn->max_xmit_dlength); |
| 354 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, |
| 355 | params, session->first_burst); |
| 356 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, |
| 357 | session->erl); |
| 358 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, |
| 359 | conn->datadgst_en); |
| 360 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, |
| 361 | conn->hdrdgst_en); |
| 362 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, |
| 363 | session->initial_r2t_en); |
| 364 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, |
| 365 | session->imm_data_en); |
| 366 | AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, |
| 367 | (conn->exp_statsn - 1)); |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * beiscsi_conn_start - offload of session to chip |
| 372 | * @cls_conn: pointer to beiscsi_conn |
| 373 | */ |
| 374 | int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) |
| 375 | { |
| 376 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 377 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| 378 | struct beiscsi_endpoint *beiscsi_ep; |
| 379 | struct beiscsi_offload_params params; |
| 380 | struct iscsi_session *session = conn->session; |
| 381 | struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); |
| 382 | struct beiscsi_hba *phba = iscsi_host_priv(shost); |
| 383 | |
| 384 | memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); |
| 385 | beiscsi_ep = beiscsi_conn->ep; |
| 386 | if (!beiscsi_ep) |
| 387 | SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); |
| 388 | |
| 389 | free_mgmt_sgl_handle(phba, beiscsi_conn->plogin_sgl_handle); |
| 390 | beiscsi_conn->login_in_progress = 0; |
| 391 | beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); |
| 392 | beiscsi_offload_connection(beiscsi_conn, ¶ms); |
| 393 | iscsi_conn_start(cls_conn); |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * beiscsi_get_cid - Allocate a cid |
| 399 | * @phba: The phba instance |
| 400 | */ |
| 401 | static int beiscsi_get_cid(struct beiscsi_hba *phba) |
| 402 | { |
| 403 | unsigned short cid = 0xFFFF; |
| 404 | |
| 405 | if (!phba->avlbl_cids) |
| 406 | return cid; |
| 407 | |
| 408 | cid = phba->cid_array[phba->cid_alloc++]; |
| 409 | if (phba->cid_alloc == phba->params.cxns_per_ctrl) |
| 410 | phba->cid_alloc = 0; |
| 411 | phba->avlbl_cids--; |
| 412 | return cid; |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * beiscsi_open_conn - Ask FW to open a TCP connection |
| 417 | * @ep: endpoint to be used |
| 418 | * @src_addr: The source IP address |
| 419 | * @dst_addr: The Destination IP address |
| 420 | * |
| 421 | * Asks the FW to open a TCP connection |
| 422 | */ |
| 423 | static int beiscsi_open_conn(struct iscsi_endpoint *ep, |
| 424 | struct sockaddr *src_addr, |
| 425 | struct sockaddr *dst_addr, int non_blocking) |
| 426 | { |
| 427 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
| 428 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
| 429 | int ret = -1; |
| 430 | |
| 431 | beiscsi_ep->ep_cid = beiscsi_get_cid(phba); |
| 432 | if (beiscsi_ep->ep_cid == 0xFFFF) { |
| 433 | SE_DEBUG(DBG_LVL_1, "No free cid available\n"); |
| 434 | return ret; |
| 435 | } |
| 436 | SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d ", |
| 437 | beiscsi_ep->ep_cid); |
| 438 | phba->ep_array[beiscsi_ep->ep_cid] = ep; |
| 439 | if (beiscsi_ep->ep_cid > |
| 440 | (phba->fw_config.iscsi_cid_start + phba->params.cxns_per_ctrl)) { |
| 441 | SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | beiscsi_ep->cid_vld = 0; |
| 446 | return mgmt_open_connection(phba, dst_addr, beiscsi_ep); |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * beiscsi_put_cid - Free the cid |
| 451 | * @phba: The phba for which the cid is being freed |
| 452 | * @cid: The cid to free |
| 453 | */ |
| 454 | static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) |
| 455 | { |
| 456 | phba->avlbl_cids++; |
| 457 | phba->cid_array[phba->cid_free++] = cid; |
| 458 | if (phba->cid_free == phba->params.cxns_per_ctrl) |
| 459 | phba->cid_free = 0; |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * beiscsi_free_ep - free endpoint |
| 464 | * @ep: pointer to iscsi endpoint structure |
| 465 | */ |
| 466 | static void beiscsi_free_ep(struct iscsi_endpoint *ep) |
| 467 | { |
| 468 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
| 469 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
| 470 | |
| 471 | beiscsi_put_cid(phba, beiscsi_ep->ep_cid); |
| 472 | beiscsi_ep->phba = NULL; |
| 473 | iscsi_destroy_endpoint(ep); |
| 474 | } |
| 475 | |
| 476 | /** |
| 477 | * beiscsi_ep_connect - Ask chip to create TCP Conn |
| 478 | * @scsi_host: Pointer to scsi_host structure |
| 479 | * @dst_addr: The IP address of Target |
| 480 | * @non_blocking: blocking or non-blocking call |
| 481 | * |
| 482 | * This routines first asks chip to create a connection and then allocates an EP |
| 483 | */ |
| 484 | struct iscsi_endpoint * |
| 485 | beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, |
| 486 | int non_blocking) |
| 487 | { |
| 488 | struct beiscsi_hba *phba; |
| 489 | struct beiscsi_endpoint *beiscsi_ep; |
| 490 | struct iscsi_endpoint *ep; |
| 491 | int ret; |
| 492 | |
| 493 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect \n"); |
| 494 | if (shost) |
| 495 | phba = iscsi_host_priv(shost); |
| 496 | else { |
| 497 | ret = -ENXIO; |
| 498 | SE_DEBUG(DBG_LVL_1, "shost is NULL \n"); |
| 499 | return ERR_PTR(ret); |
| 500 | } |
| 501 | ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); |
| 502 | if (!ep) { |
| 503 | ret = -ENOMEM; |
| 504 | return ERR_PTR(ret); |
| 505 | } |
| 506 | |
| 507 | beiscsi_ep = ep->dd_data; |
| 508 | beiscsi_ep->phba = phba; |
| 509 | |
| 510 | if (beiscsi_open_conn(ep, NULL, dst_addr, non_blocking)) { |
| 511 | SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); |
| 512 | ret = -ENOMEM; |
| 513 | goto free_ep; |
| 514 | } |
| 515 | |
| 516 | return ep; |
| 517 | |
| 518 | free_ep: |
| 519 | beiscsi_free_ep(ep); |
| 520 | return ERR_PTR(ret); |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * beiscsi_ep_poll - Poll to see if connection is established |
| 525 | * @ep: endpoint to be used |
| 526 | * @timeout_ms: timeout specified in millisecs |
| 527 | * |
| 528 | * Poll to see if TCP connection established |
| 529 | */ |
| 530 | int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) |
| 531 | { |
| 532 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
| 533 | |
| 534 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); |
| 535 | if (beiscsi_ep->cid_vld == 1) |
| 536 | return 1; |
| 537 | else |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * beiscsi_close_conn - Upload the connection |
| 543 | * @ep: The iscsi endpoint |
| 544 | * @flag: The type of connection closure |
| 545 | */ |
| 546 | static int beiscsi_close_conn(struct iscsi_endpoint *ep, int flag) |
| 547 | { |
| 548 | int ret = 0; |
| 549 | struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
| 550 | struct beiscsi_hba *phba = beiscsi_ep->phba; |
| 551 | |
| 552 | if (MGMT_STATUS_SUCCESS != |
| 553 | mgmt_upload_connection(phba, beiscsi_ep->ep_cid, |
| 554 | CONNECTION_UPLOAD_GRACEFUL)) { |
| 555 | SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x", |
| 556 | beiscsi_ep->ep_cid); |
| 557 | ret = -1; |
| 558 | } |
| 559 | |
| 560 | return ret; |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * beiscsi_ep_disconnect - Tears down the TCP connection |
| 565 | * @ep: endpoint to be used |
| 566 | * |
| 567 | * Tears down the TCP connection |
| 568 | */ |
| 569 | void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) |
| 570 | { |
| 571 | struct beiscsi_conn *beiscsi_conn; |
| 572 | struct beiscsi_endpoint *beiscsi_ep; |
| 573 | struct beiscsi_hba *phba; |
| 574 | int flag = 0; |
| 575 | |
| 576 | beiscsi_ep = ep->dd_data; |
| 577 | phba = beiscsi_ep->phba; |
| 578 | SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect\n"); |
| 579 | |
| 580 | if (beiscsi_ep->conn) { |
| 581 | beiscsi_conn = beiscsi_ep->conn; |
| 582 | iscsi_suspend_queue(beiscsi_conn->conn); |
| 583 | beiscsi_close_conn(ep, flag); |
| 584 | } |
| 585 | |
| 586 | beiscsi_free_ep(ep); |
| 587 | } |
| 588 | |
| 589 | /** |
| 590 | * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table |
| 591 | * @phba: The phba instance |
| 592 | * @cid: The cid to free |
| 593 | */ |
| 594 | static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, |
| 595 | unsigned int cid) |
| 596 | { |
| 597 | if (phba->conn_table[cid]) |
| 598 | phba->conn_table[cid] = NULL; |
| 599 | else { |
| 600 | SE_DEBUG(DBG_LVL_8, "Connection table Not occupied. \n"); |
| 601 | return -EINVAL; |
| 602 | } |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | /** |
| 607 | * beiscsi_conn_stop - Invalidate and stop the connection |
| 608 | * @cls_conn: pointer to get iscsi_conn |
| 609 | * @flag: The type of connection closure |
| 610 | */ |
| 611 | void beiscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) |
| 612 | { |
| 613 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 614 | struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| 615 | struct beiscsi_endpoint *beiscsi_ep; |
| 616 | struct iscsi_session *session = conn->session; |
| 617 | struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); |
| 618 | struct beiscsi_hba *phba = iscsi_host_priv(shost); |
| 619 | unsigned int status; |
| 620 | unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; |
| 621 | |
| 622 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop\n"); |
| 623 | beiscsi_ep = beiscsi_conn->ep; |
| 624 | if (!beiscsi_ep) { |
| 625 | SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop , no beiscsi_ep\n"); |
| 626 | return; |
| 627 | } |
| 628 | status = mgmt_invalidate_connection(phba, beiscsi_ep, |
| 629 | beiscsi_ep->ep_cid, 1, |
| 630 | savecfg_flag); |
| 631 | if (status != MGMT_STATUS_SUCCESS) { |
| 632 | SE_DEBUG(DBG_LVL_1, |
| 633 | "mgmt_invalidate_connection Failed for cid=%d \n", |
| 634 | beiscsi_ep->ep_cid); |
| 635 | } |
| 636 | beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); |
| 637 | iscsi_conn_stop(cls_conn, flag); |
| 638 | } |