1 /* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2013 Broadcom Corporation 4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. 5 * Copyright (c) 2007, 2008 Mike Christie 6 * Copyright (c) 2014, QLogic Corporation 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation. 11 * 12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) 13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com) 14 * Maintained by: QLogic-Storage-Upstream@qlogic.com 15 */ 16 17 #include <linux/gfp.h> 18 #include <scsi/scsi_tcq.h> 19 #include <scsi/libiscsi.h> 20 #include "bnx2i.h" 21 22 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); 23 24 /** 25 * bnx2i_get_cid_num - get cid from ep 26 * @ep: endpoint pointer 27 * 28 * Only applicable to 57710 family of devices 29 */ 30 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep) 31 { 32 u32 cid; 33 34 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 35 cid = ep->ep_cid; 36 else 37 cid = GET_CID_NUM(ep->ep_cid); 38 return cid; 39 } 40 41 42 /** 43 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type 44 * @hba: Adapter for which adjustments is to be made 45 * 46 * Only applicable to 57710 family of devices 47 */ 48 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba) 49 { 50 u32 num_elements_per_pg; 51 52 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) || 53 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) || 54 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 55 if (!is_power_of_2(hba->max_sqes)) 56 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes); 57 58 if (!is_power_of_2(hba->max_rqes)) 59 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes); 60 } 61 62 /* Adjust each queue size if the user selection does not 63 * yield integral num of page buffers 64 */ 65 /* adjust SQ */ 66 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 67 if (hba->max_sqes < num_elements_per_pg) 68 hba->max_sqes = num_elements_per_pg; 69 else if (hba->max_sqes % num_elements_per_pg) 70 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) & 71 ~(num_elements_per_pg - 1); 72 73 /* adjust CQ */ 74 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE; 75 if (hba->max_cqes < num_elements_per_pg) 76 hba->max_cqes = num_elements_per_pg; 77 else if (hba->max_cqes % num_elements_per_pg) 78 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) & 79 ~(num_elements_per_pg - 1); 80 81 /* adjust RQ */ 82 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE; 83 if (hba->max_rqes < num_elements_per_pg) 84 hba->max_rqes = num_elements_per_pg; 85 else if (hba->max_rqes % num_elements_per_pg) 86 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) & 87 ~(num_elements_per_pg - 1); 88 } 89 90 91 /** 92 * bnx2i_get_link_state - get network interface link state 93 * @hba: adapter instance pointer 94 * 95 * updates adapter structure flag based on netdev state 96 */ 97 static void bnx2i_get_link_state(struct bnx2i_hba *hba) 98 { 99 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state)) 100 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 101 else 102 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 103 } 104 105 106 /** 107 * bnx2i_iscsi_license_error - displays iscsi license related error message 108 * @hba: adapter instance pointer 109 * @error_code: error classification 110 * 111 * Puts out an error log when driver is unable to offload iscsi connection 112 * due to license restrictions 113 */ 114 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code) 115 { 116 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED) 117 /* iSCSI offload not supported on this device */ 118 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n", 119 hba->netdev->name); 120 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED) 121 /* iSCSI offload not supported on this LOM device */ 122 printk(KERN_ERR "bnx2i: LOM is not enable to " 123 "offload iSCSI connections, dev=%s\n", 124 hba->netdev->name); 125 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state); 126 } 127 128 129 /** 130 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification 131 * @ep: endpoint (transport identifier) structure 132 * @action: action, ARM or DISARM. For now only ARM_CQE is used 133 * 134 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt 135 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is 136 * outstanding and on chip timer expires 137 */ 138 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action) 139 { 140 struct bnx2i_5771x_cq_db *cq_db; 141 u16 cq_index; 142 u16 next_index = 0; 143 u32 num_active_cmds; 144 145 /* Coalesce CQ entries only on 10G devices */ 146 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 147 return 0; 148 149 /* Do not update CQ DB multiple times before firmware writes 150 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious 151 * interrupts and other unwanted results 152 */ 153 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 154 155 if (action != CNIC_ARM_CQE_FP) 156 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF) 157 return 0; 158 159 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) { 160 num_active_cmds = atomic_read(&ep->num_active_cmds); 161 if (num_active_cmds <= event_coal_min) 162 next_index = 1; 163 else { 164 next_index = num_active_cmds >> ep->ec_shift; 165 if (next_index > num_active_cmds - event_coal_min) 166 next_index = num_active_cmds - event_coal_min; 167 } 168 if (!next_index) 169 next_index = 1; 170 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1; 171 if (cq_index > ep->qp.cqe_size * 2) 172 cq_index -= ep->qp.cqe_size * 2; 173 if (!cq_index) 174 cq_index = 1; 175 176 cq_db->sqn[0] = cq_index; 177 } 178 return next_index; 179 } 180 181 182 /** 183 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer 184 * @conn: iscsi connection on which RQ event occurred 185 * @ptr: driver buffer to which RQ buffer contents is to 186 * be copied 187 * @len: length of valid data inside RQ buf 188 * 189 * Copies RQ buffer contents from shared (DMA'able) memory region to 190 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and 191 * scsi sense info 192 */ 193 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len) 194 { 195 if (!bnx2i_conn->ep->qp.rqe_left) 196 return; 197 198 bnx2i_conn->ep->qp.rqe_left--; 199 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len); 200 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) { 201 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe; 202 bnx2i_conn->ep->qp.rq_cons_idx = 0; 203 } else { 204 bnx2i_conn->ep->qp.rq_cons_qe++; 205 bnx2i_conn->ep->qp.rq_cons_idx++; 206 } 207 } 208 209 210 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) 211 { 212 struct bnx2i_5771x_dbell dbell; 213 u32 msg; 214 215 memset(&dbell, 0, sizeof(dbell)); 216 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << 217 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); 218 msg = *((u32 *)&dbell); 219 /* TODO : get doorbell register mapping */ 220 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); 221 } 222 223 224 /** 225 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell 226 * @conn: iscsi connection on which event to post 227 * @count: number of RQ buffer being posted to chip 228 * 229 * No need to ring hardware doorbell for 57710 family of devices 230 */ 231 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count) 232 { 233 struct bnx2i_5771x_sq_rq_db *rq_db; 234 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000); 235 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 236 237 ep->qp.rqe_left += count; 238 ep->qp.rq_prod_idx &= 0x7FFF; 239 ep->qp.rq_prod_idx += count; 240 241 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) { 242 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes; 243 if (!hi_bit) 244 ep->qp.rq_prod_idx |= 0x8000; 245 } else 246 ep->qp.rq_prod_idx |= hi_bit; 247 248 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 249 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt; 250 rq_db->prod_idx = ep->qp.rq_prod_idx; 251 /* no need to ring hardware doorbell for 57710 */ 252 } else { 253 writew(ep->qp.rq_prod_idx, 254 ep->qp.ctx_base + CNIC_RECV_DOORBELL); 255 } 256 mmiowb(); 257 } 258 259 260 /** 261 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine 262 * @conn: iscsi connection to which new SQ entries belong 263 * @count: number of SQ WQEs to post 264 * 265 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family 266 * of devices. For 5706/5708/5709 new SQ WQE count is written into the 267 * doorbell register 268 */ 269 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) 270 { 271 struct bnx2i_5771x_sq_rq_db *sq_db; 272 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 273 274 atomic_inc(&ep->num_active_cmds); 275 wmb(); /* flush SQ WQE memory before the doorbell is rung */ 276 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 277 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; 278 sq_db->prod_idx = ep->qp.sq_prod_idx; 279 bnx2i_ring_577xx_doorbell(bnx2i_conn); 280 } else 281 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); 282 283 mmiowb(); /* flush posted PCI writes */ 284 } 285 286 287 /** 288 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters 289 * @conn: iscsi connection to which new SQ entries belong 290 * @count: number of SQ WQEs to post 291 * 292 * this routine will update SQ driver parameters and ring the doorbell 293 */ 294 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, 295 int count) 296 { 297 int tmp_cnt; 298 299 if (count == 1) { 300 if (bnx2i_conn->ep->qp.sq_prod_qe == 301 bnx2i_conn->ep->qp.sq_last_qe) 302 bnx2i_conn->ep->qp.sq_prod_qe = 303 bnx2i_conn->ep->qp.sq_first_qe; 304 else 305 bnx2i_conn->ep->qp.sq_prod_qe++; 306 } else { 307 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= 308 bnx2i_conn->ep->qp.sq_last_qe) 309 bnx2i_conn->ep->qp.sq_prod_qe += count; 310 else { 311 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - 312 bnx2i_conn->ep->qp.sq_prod_qe; 313 bnx2i_conn->ep->qp.sq_prod_qe = 314 &bnx2i_conn->ep->qp.sq_first_qe[count - 315 (tmp_cnt + 1)]; 316 } 317 } 318 bnx2i_conn->ep->qp.sq_prod_idx += count; 319 /* Ring the doorbell */ 320 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); 321 } 322 323 324 /** 325 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware 326 * @conn: iscsi connection 327 * @cmd: driver command structure which is requesting 328 * a WQE to sent to chip for further processing 329 * 330 * prepare and post an iSCSI Login request WQE to CNIC firmware 331 */ 332 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, 333 struct iscsi_task *task) 334 { 335 struct bnx2i_login_request *login_wqe; 336 struct iscsi_login_req *login_hdr; 337 u32 dword; 338 339 login_hdr = (struct iscsi_login_req *)task->hdr; 340 login_wqe = (struct bnx2i_login_request *) 341 bnx2i_conn->ep->qp.sq_prod_qe; 342 343 login_wqe->op_code = login_hdr->opcode; 344 login_wqe->op_attr = login_hdr->flags; 345 login_wqe->version_max = login_hdr->max_version; 346 login_wqe->version_min = login_hdr->min_version; 347 login_wqe->data_length = ntoh24(login_hdr->dlength); 348 login_wqe->isid_lo = *((u32 *) login_hdr->isid); 349 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2); 350 login_wqe->tsih = login_hdr->tsih; 351 login_wqe->itt = task->itt | 352 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT); 353 login_wqe->cid = login_hdr->cid; 354 355 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn); 356 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); 357 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN; 358 359 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 360 login_wqe->resp_bd_list_addr_hi = 361 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 362 363 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) | 364 (bnx2i_conn->gen_pdu.resp_buf_size << 365 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 366 login_wqe->resp_buffer = dword; 367 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 368 login_wqe->bd_list_addr_hi = 369 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 370 login_wqe->num_bds = 1; 371 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 372 373 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 374 return 0; 375 } 376 377 /** 378 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware 379 * @conn: iscsi connection 380 * @mtask: driver command structure which is requesting 381 * a WQE to sent to chip for further processing 382 * 383 * prepare and post an iSCSI Login request WQE to CNIC firmware 384 */ 385 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn, 386 struct iscsi_task *mtask) 387 { 388 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 389 struct iscsi_tm *tmfabort_hdr; 390 struct scsi_cmnd *ref_sc; 391 struct iscsi_task *ctask; 392 struct bnx2i_tmf_request *tmfabort_wqe; 393 u32 dword; 394 u32 scsi_lun[2]; 395 396 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; 397 tmfabort_wqe = (struct bnx2i_tmf_request *) 398 bnx2i_conn->ep->qp.sq_prod_qe; 399 400 tmfabort_wqe->op_code = tmfabort_hdr->opcode; 401 tmfabort_wqe->op_attr = tmfabort_hdr->flags; 402 403 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); 404 tmfabort_wqe->reserved2 = 0; 405 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); 406 407 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { 408 case ISCSI_TM_FUNC_ABORT_TASK: 409 case ISCSI_TM_FUNC_TASK_REASSIGN: 410 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); 411 if (!ctask || !ctask->sc) 412 /* 413 * the iscsi layer must have completed the cmd while 414 * was starting up. 415 * 416 * Note: In the case of a SCSI cmd timeout, the task's 417 * sc is still active; hence ctask->sc != 0 418 * In this case, the task must be aborted 419 */ 420 return 0; 421 422 ref_sc = ctask->sc; 423 if (ref_sc->sc_data_direction == DMA_TO_DEVICE) 424 dword = (ISCSI_TASK_TYPE_WRITE << 425 ISCSI_CMD_REQUEST_TYPE_SHIFT); 426 else 427 dword = (ISCSI_TASK_TYPE_READ << 428 ISCSI_CMD_REQUEST_TYPE_SHIFT); 429 tmfabort_wqe->ref_itt = (dword | 430 (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); 431 break; 432 default: 433 tmfabort_wqe->ref_itt = RESERVED_ITT; 434 } 435 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun)); 436 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); 437 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); 438 439 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); 440 441 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 442 tmfabort_wqe->bd_list_addr_hi = (u32) 443 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 444 tmfabort_wqe->num_bds = 1; 445 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 446 447 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 448 return 0; 449 } 450 451 /** 452 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware 453 * @conn: iscsi connection 454 * @mtask: driver command structure which is requesting 455 * a WQE to sent to chip for further processing 456 * 457 * prepare and post an iSCSI Text request WQE to CNIC firmware 458 */ 459 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn, 460 struct iscsi_task *mtask) 461 { 462 struct bnx2i_text_request *text_wqe; 463 struct iscsi_text *text_hdr; 464 u32 dword; 465 466 text_hdr = (struct iscsi_text *)mtask->hdr; 467 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe; 468 469 memset(text_wqe, 0, sizeof(struct bnx2i_text_request)); 470 471 text_wqe->op_code = text_hdr->opcode; 472 text_wqe->op_attr = text_hdr->flags; 473 text_wqe->data_length = ntoh24(text_hdr->dlength); 474 text_wqe->itt = mtask->itt | 475 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT); 476 text_wqe->ttt = be32_to_cpu(text_hdr->ttt); 477 478 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn); 479 480 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 481 text_wqe->resp_bd_list_addr_hi = 482 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 483 484 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) | 485 (bnx2i_conn->gen_pdu.resp_buf_size << 486 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 487 text_wqe->resp_buffer = dword; 488 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 489 text_wqe->bd_list_addr_hi = 490 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 491 text_wqe->num_bds = 1; 492 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 493 494 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 495 return 0; 496 } 497 498 499 /** 500 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware 501 * @conn: iscsi connection 502 * @cmd: driver command structure which is requesting 503 * a WQE to sent to chip for further processing 504 * 505 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware 506 */ 507 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, 508 struct bnx2i_cmd *cmd) 509 { 510 struct bnx2i_cmd_request *scsi_cmd_wqe; 511 512 scsi_cmd_wqe = (struct bnx2i_cmd_request *) 513 bnx2i_conn->ep->qp.sq_prod_qe; 514 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); 515 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 516 517 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 518 return 0; 519 } 520 521 /** 522 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware 523 * @conn: iscsi connection 524 * @cmd: driver command structure which is requesting 525 * a WQE to sent to chip for further processing 526 * @datap: payload buffer pointer 527 * @data_len: payload data length 528 * @unsol: indicated whether nopout pdu is unsolicited pdu or 529 * in response to target's NOPIN w/ TTT != FFFFFFFF 530 * 531 * prepare and post a nopout request WQE to CNIC firmware 532 */ 533 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, 534 struct iscsi_task *task, 535 char *datap, int data_len, int unsol) 536 { 537 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 538 struct bnx2i_nop_out_request *nopout_wqe; 539 struct iscsi_nopout *nopout_hdr; 540 541 nopout_hdr = (struct iscsi_nopout *)task->hdr; 542 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; 543 544 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request)); 545 546 nopout_wqe->op_code = nopout_hdr->opcode; 547 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; 548 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8); 549 550 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 551 u32 tmp = nopout_wqe->lun[0]; 552 /* 57710 requires LUN field to be swapped */ 553 nopout_wqe->lun[0] = nopout_wqe->lun[1]; 554 nopout_wqe->lun[1] = tmp; 555 } 556 557 nopout_wqe->itt = ((u16)task->itt | 558 (ISCSI_TASK_TYPE_MPATH << 559 ISCSI_TMF_REQUEST_TYPE_SHIFT)); 560 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt); 561 nopout_wqe->flags = 0; 562 if (!unsol) 563 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 564 else if (nopout_hdr->itt == RESERVED_ITT) 565 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 566 567 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 568 nopout_wqe->data_length = data_len; 569 if (data_len) { 570 /* handle payload data, not required in first release */ 571 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); 572 } else { 573 nopout_wqe->bd_list_addr_lo = (u32) 574 bnx2i_conn->hba->mp_bd_dma; 575 nopout_wqe->bd_list_addr_hi = 576 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 577 nopout_wqe->num_bds = 1; 578 } 579 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 580 581 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 582 return 0; 583 } 584 585 586 /** 587 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware 588 * @conn: iscsi connection 589 * @cmd: driver command structure which is requesting 590 * a WQE to sent to chip for further processing 591 * 592 * prepare and post logout request WQE to CNIC firmware 593 */ 594 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, 595 struct iscsi_task *task) 596 { 597 struct bnx2i_logout_request *logout_wqe; 598 struct iscsi_logout *logout_hdr; 599 600 logout_hdr = (struct iscsi_logout *)task->hdr; 601 602 logout_wqe = (struct bnx2i_logout_request *) 603 bnx2i_conn->ep->qp.sq_prod_qe; 604 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); 605 606 logout_wqe->op_code = logout_hdr->opcode; 607 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 608 logout_wqe->op_attr = 609 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; 610 logout_wqe->itt = ((u16)task->itt | 611 (ISCSI_TASK_TYPE_MPATH << 612 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); 613 logout_wqe->data_length = 0; 614 logout_wqe->cid = 0; 615 616 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 617 logout_wqe->bd_list_addr_hi = (u32) 618 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 619 logout_wqe->num_bds = 1; 620 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 621 622 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; 623 624 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 625 return 0; 626 } 627 628 629 /** 630 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware 631 * @conn: iscsi connection which requires iscsi parameter update 632 * 633 * sends down iSCSI Conn Update request to move iSCSI conn to FFP 634 */ 635 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) 636 { 637 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 638 struct bnx2i_hba *hba = bnx2i_conn->hba; 639 struct kwqe *kwqe_arr[2]; 640 struct iscsi_kwqe_conn_update *update_wqe; 641 struct iscsi_kwqe_conn_update conn_update_kwqe; 642 643 update_wqe = &conn_update_kwqe; 644 645 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; 646 update_wqe->hdr.flags = 647 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 648 649 /* 5771x requires conn context id to be passed as is */ 650 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) 651 update_wqe->context_id = bnx2i_conn->ep->ep_cid; 652 else 653 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); 654 update_wqe->conn_flags = 0; 655 if (conn->hdrdgst_en) 656 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; 657 if (conn->datadgst_en) 658 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; 659 if (conn->session->initial_r2t_en) 660 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; 661 if (conn->session->imm_data_en) 662 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; 663 664 update_wqe->max_send_pdu_length = conn->max_xmit_dlength; 665 update_wqe->max_recv_pdu_length = conn->max_recv_dlength; 666 update_wqe->first_burst_length = conn->session->first_burst; 667 update_wqe->max_burst_length = conn->session->max_burst; 668 update_wqe->exp_stat_sn = conn->exp_statsn; 669 update_wqe->max_outstanding_r2ts = conn->session->max_r2t; 670 update_wqe->session_error_recovery_level = conn->session->erl; 671 iscsi_conn_printk(KERN_ALERT, conn, 672 "bnx2i: conn update - MBL 0x%x FBL 0x%x" 673 "MRDSL_I 0x%x MRDSL_T 0x%x \n", 674 update_wqe->max_burst_length, 675 update_wqe->first_burst_length, 676 update_wqe->max_recv_pdu_length, 677 update_wqe->max_send_pdu_length); 678 679 kwqe_arr[0] = (struct kwqe *) update_wqe; 680 if (hba->cnic && hba->cnic->submit_kwqes) 681 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 682 } 683 684 685 /** 686 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware 687 * @data: endpoint (transport handle) structure pointer 688 * 689 * routine to handle connection offload/destroy request timeout 690 */ 691 void bnx2i_ep_ofld_timer(struct timer_list *t) 692 { 693 struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer); 694 695 if (ep->state == EP_STATE_OFLD_START) { 696 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); 697 ep->state = EP_STATE_OFLD_FAILED; 698 } else if (ep->state == EP_STATE_DISCONN_START) { 699 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); 700 ep->state = EP_STATE_DISCONN_TIMEDOUT; 701 } else if (ep->state == EP_STATE_CLEANUP_START) { 702 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); 703 ep->state = EP_STATE_CLEANUP_FAILED; 704 } 705 706 wake_up_interruptible(&ep->ofld_wait); 707 } 708 709 710 static int bnx2i_power_of2(u32 val) 711 { 712 u32 power = 0; 713 if (val & (val - 1)) 714 return power; 715 val--; 716 while (val) { 717 val = val >> 1; 718 power++; 719 } 720 return power; 721 } 722 723 724 /** 725 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request 726 * @hba: adapter structure pointer 727 * @cmd: driver command structure which is requesting 728 * a WQE to sent to chip for further processing 729 * 730 * prepares and posts CONN_OFLD_REQ1/2 KWQE 731 */ 732 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 733 { 734 struct bnx2i_cleanup_request *cmd_cleanup; 735 736 cmd_cleanup = 737 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; 738 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); 739 740 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; 741 cmd_cleanup->itt = cmd->req.itt; 742 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ 743 744 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); 745 } 746 747 748 /** 749 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process 750 * @hba: adapter structure pointer 751 * @ep: endpoint (transport identifier) structure 752 * 753 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate 754 * iscsi connection context clean-up process 755 */ 756 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 757 { 758 struct kwqe *kwqe_arr[2]; 759 struct iscsi_kwqe_conn_destroy conn_cleanup; 760 int rc = -EINVAL; 761 762 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); 763 764 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; 765 conn_cleanup.hdr.flags = 766 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 767 /* 5771x requires conn context id to be passed as is */ 768 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 769 conn_cleanup.context_id = ep->ep_cid; 770 else 771 conn_cleanup.context_id = (ep->ep_cid >> 7); 772 773 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; 774 775 kwqe_arr[0] = (struct kwqe *) &conn_cleanup; 776 if (hba->cnic && hba->cnic->submit_kwqes) 777 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 778 779 return rc; 780 } 781 782 783 /** 784 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process 785 * @hba: adapter structure pointer 786 * @ep: endpoint (transport identifier) structure 787 * 788 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 789 */ 790 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, 791 struct bnx2i_endpoint *ep) 792 { 793 struct kwqe *kwqe_arr[2]; 794 struct iscsi_kwqe_conn_offload1 ofld_req1; 795 struct iscsi_kwqe_conn_offload2 ofld_req2; 796 dma_addr_t dma_addr; 797 int num_kwqes = 2; 798 u32 *ptbl; 799 int rc = -EINVAL; 800 801 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 802 ofld_req1.hdr.flags = 803 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 804 805 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 806 807 dma_addr = ep->qp.sq_pgtbl_phys; 808 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 809 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 810 811 dma_addr = ep->qp.cq_pgtbl_phys; 812 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 813 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 814 815 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 816 ofld_req2.hdr.flags = 817 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 818 819 dma_addr = ep->qp.rq_pgtbl_phys; 820 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 821 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 822 823 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 824 825 ofld_req2.sq_first_pte.hi = *ptbl++; 826 ofld_req2.sq_first_pte.lo = *ptbl; 827 828 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 829 ofld_req2.cq_first_pte.hi = *ptbl++; 830 ofld_req2.cq_first_pte.lo = *ptbl; 831 832 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 833 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 834 ofld_req2.num_additional_wqes = 0; 835 836 if (hba->cnic && hba->cnic->submit_kwqes) 837 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 838 839 return rc; 840 } 841 842 843 /** 844 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation 845 * @hba: adapter structure pointer 846 * @ep: endpoint (transport identifier) structure 847 * 848 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 849 */ 850 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, 851 struct bnx2i_endpoint *ep) 852 { 853 struct kwqe *kwqe_arr[5]; 854 struct iscsi_kwqe_conn_offload1 ofld_req1; 855 struct iscsi_kwqe_conn_offload2 ofld_req2; 856 struct iscsi_kwqe_conn_offload3 ofld_req3[1]; 857 dma_addr_t dma_addr; 858 int num_kwqes = 2; 859 u32 *ptbl; 860 int rc = -EINVAL; 861 862 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 863 ofld_req1.hdr.flags = 864 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 865 866 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 867 868 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; 869 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 870 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 871 872 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; 873 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 874 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 875 876 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 877 ofld_req2.hdr.flags = 878 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 879 880 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; 881 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 882 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 883 884 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 885 ofld_req2.sq_first_pte.hi = *ptbl++; 886 ofld_req2.sq_first_pte.lo = *ptbl; 887 888 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 889 ofld_req2.cq_first_pte.hi = *ptbl++; 890 ofld_req2.cq_first_pte.lo = *ptbl; 891 892 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 893 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 894 895 ofld_req2.num_additional_wqes = 1; 896 memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); 897 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 898 ofld_req3[0].qp_first_pte[0].hi = *ptbl++; 899 ofld_req3[0].qp_first_pte[0].lo = *ptbl; 900 901 kwqe_arr[2] = (struct kwqe *) ofld_req3; 902 /* need if we decide to go with multiple KCQE's per conn */ 903 num_kwqes += 1; 904 905 if (hba->cnic && hba->cnic->submit_kwqes) 906 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 907 908 return rc; 909 } 910 911 /** 912 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process 913 * 914 * @hba: adapter structure pointer 915 * @ep: endpoint (transport identifier) structure 916 * 917 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE 918 */ 919 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 920 { 921 int rc; 922 923 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 924 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); 925 else 926 rc = bnx2i_570x_send_conn_ofld_req(hba, ep); 927 928 return rc; 929 } 930 931 932 /** 933 * setup_qp_page_tables - iscsi QP page table setup function 934 * @ep: endpoint (transport identifier) structure 935 * 936 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires 937 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires 938 * PT in little endian format 939 */ 940 static void setup_qp_page_tables(struct bnx2i_endpoint *ep) 941 { 942 int num_pages; 943 u32 *ptbl; 944 dma_addr_t page; 945 int cnic_dev_10g; 946 947 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 948 cnic_dev_10g = 1; 949 else 950 cnic_dev_10g = 0; 951 952 /* SQ page table */ 953 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); 954 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE; 955 page = ep->qp.sq_phys; 956 957 if (cnic_dev_10g) 958 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 959 else 960 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 961 while (num_pages--) { 962 if (cnic_dev_10g) { 963 /* PTE is written in little endian format for 57710 */ 964 *ptbl = (u32) page; 965 ptbl++; 966 *ptbl = (u32) ((u64) page >> 32); 967 ptbl++; 968 page += CNIC_PAGE_SIZE; 969 } else { 970 /* PTE is written in big endian format for 971 * 5706/5708/5709 devices */ 972 *ptbl = (u32) ((u64) page >> 32); 973 ptbl++; 974 *ptbl = (u32) page; 975 ptbl++; 976 page += CNIC_PAGE_SIZE; 977 } 978 } 979 980 /* RQ page table */ 981 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); 982 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE; 983 page = ep->qp.rq_phys; 984 985 if (cnic_dev_10g) 986 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 987 else 988 ptbl = (u32 *) ep->qp.rq_pgtbl_virt; 989 while (num_pages--) { 990 if (cnic_dev_10g) { 991 /* PTE is written in little endian format for 57710 */ 992 *ptbl = (u32) page; 993 ptbl++; 994 *ptbl = (u32) ((u64) page >> 32); 995 ptbl++; 996 page += CNIC_PAGE_SIZE; 997 } else { 998 /* PTE is written in big endian format for 999 * 5706/5708/5709 devices */ 1000 *ptbl = (u32) ((u64) page >> 32); 1001 ptbl++; 1002 *ptbl = (u32) page; 1003 ptbl++; 1004 page += CNIC_PAGE_SIZE; 1005 } 1006 } 1007 1008 /* CQ page table */ 1009 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); 1010 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE; 1011 page = ep->qp.cq_phys; 1012 1013 if (cnic_dev_10g) 1014 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 1015 else 1016 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 1017 while (num_pages--) { 1018 if (cnic_dev_10g) { 1019 /* PTE is written in little endian format for 57710 */ 1020 *ptbl = (u32) page; 1021 ptbl++; 1022 *ptbl = (u32) ((u64) page >> 32); 1023 ptbl++; 1024 page += CNIC_PAGE_SIZE; 1025 } else { 1026 /* PTE is written in big endian format for 1027 * 5706/5708/5709 devices */ 1028 *ptbl = (u32) ((u64) page >> 32); 1029 ptbl++; 1030 *ptbl = (u32) page; 1031 ptbl++; 1032 page += CNIC_PAGE_SIZE; 1033 } 1034 } 1035 } 1036 1037 1038 /** 1039 * bnx2i_alloc_qp_resc - allocates required resources for QP. 1040 * @hba: adapter structure pointer 1041 * @ep: endpoint (transport identifier) structure 1042 * 1043 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able 1044 * memory for SQ/RQ/CQ and page tables. EP structure elements such 1045 * as producer/consumer indexes/pointers, queue sizes and page table 1046 * contents are setup 1047 */ 1048 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1049 { 1050 struct bnx2i_5771x_cq_db *cq_db; 1051 1052 ep->hba = hba; 1053 ep->conn = NULL; 1054 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; 1055 1056 /* Allocate page table memory for SQ which is page aligned */ 1057 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; 1058 ep->qp.sq_mem_size = 1059 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1060 ep->qp.sq_pgtbl_size = 1061 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1062 ep->qp.sq_pgtbl_size = 1063 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1064 1065 ep->qp.sq_pgtbl_virt = 1066 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1067 &ep->qp.sq_pgtbl_phys, GFP_KERNEL); 1068 if (!ep->qp.sq_pgtbl_virt) { 1069 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", 1070 ep->qp.sq_pgtbl_size); 1071 goto mem_alloc_err; 1072 } 1073 1074 /* Allocate memory area for actual SQ element */ 1075 ep->qp.sq_virt = 1076 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1077 &ep->qp.sq_phys, GFP_KERNEL); 1078 if (!ep->qp.sq_virt) { 1079 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", 1080 ep->qp.sq_mem_size); 1081 goto mem_alloc_err; 1082 } 1083 1084 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size); 1085 ep->qp.sq_first_qe = ep->qp.sq_virt; 1086 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1087 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1088 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1089 ep->qp.sq_prod_idx = 0; 1090 ep->qp.sq_cons_idx = 0; 1091 ep->qp.sqe_left = hba->max_sqes; 1092 1093 /* Allocate page table memory for CQ which is page aligned */ 1094 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1095 ep->qp.cq_mem_size = 1096 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1097 ep->qp.cq_pgtbl_size = 1098 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1099 ep->qp.cq_pgtbl_size = 1100 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1101 1102 ep->qp.cq_pgtbl_virt = 1103 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1104 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1105 if (!ep->qp.cq_pgtbl_virt) { 1106 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1107 ep->qp.cq_pgtbl_size); 1108 goto mem_alloc_err; 1109 } 1110 1111 /* Allocate memory area for actual CQ element */ 1112 ep->qp.cq_virt = 1113 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1114 &ep->qp.cq_phys, GFP_KERNEL); 1115 if (!ep->qp.cq_virt) { 1116 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1117 ep->qp.cq_mem_size); 1118 goto mem_alloc_err; 1119 } 1120 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size); 1121 1122 ep->qp.cq_first_qe = ep->qp.cq_virt; 1123 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1124 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1125 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1126 ep->qp.cq_prod_idx = 0; 1127 ep->qp.cq_cons_idx = 0; 1128 ep->qp.cqe_left = hba->max_cqes; 1129 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1130 ep->qp.cqe_size = hba->max_cqes; 1131 1132 /* Invalidate all EQ CQE index, req only for 57710 */ 1133 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1134 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1135 1136 /* Allocate page table memory for RQ which is page aligned */ 1137 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1138 ep->qp.rq_mem_size = 1139 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1140 ep->qp.rq_pgtbl_size = 1141 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1142 ep->qp.rq_pgtbl_size = 1143 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1144 1145 ep->qp.rq_pgtbl_virt = 1146 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1147 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1148 if (!ep->qp.rq_pgtbl_virt) { 1149 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1150 ep->qp.rq_pgtbl_size); 1151 goto mem_alloc_err; 1152 } 1153 1154 /* Allocate memory area for actual RQ element */ 1155 ep->qp.rq_virt = 1156 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1157 &ep->qp.rq_phys, GFP_KERNEL); 1158 if (!ep->qp.rq_virt) { 1159 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1160 ep->qp.rq_mem_size); 1161 goto mem_alloc_err; 1162 } 1163 1164 ep->qp.rq_first_qe = ep->qp.rq_virt; 1165 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1166 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1167 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1168 ep->qp.rq_prod_idx = 0x8000; 1169 ep->qp.rq_cons_idx = 0; 1170 ep->qp.rqe_left = hba->max_rqes; 1171 1172 setup_qp_page_tables(ep); 1173 1174 return 0; 1175 1176 mem_alloc_err: 1177 bnx2i_free_qp_resc(hba, ep); 1178 return -ENOMEM; 1179 } 1180 1181 1182 1183 /** 1184 * bnx2i_free_qp_resc - free memory resources held by QP 1185 * @hba: adapter structure pointer 1186 * @ep: endpoint (transport identifier) structure 1187 * 1188 * Free QP resources - SQ/RQ/CQ memory and page tables. 1189 */ 1190 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1191 { 1192 if (ep->qp.ctx_base) { 1193 iounmap(ep->qp.ctx_base); 1194 ep->qp.ctx_base = NULL; 1195 } 1196 /* Free SQ mem */ 1197 if (ep->qp.sq_pgtbl_virt) { 1198 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1199 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1200 ep->qp.sq_pgtbl_virt = NULL; 1201 ep->qp.sq_pgtbl_phys = 0; 1202 } 1203 if (ep->qp.sq_virt) { 1204 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1205 ep->qp.sq_virt, ep->qp.sq_phys); 1206 ep->qp.sq_virt = NULL; 1207 ep->qp.sq_phys = 0; 1208 } 1209 1210 /* Free RQ mem */ 1211 if (ep->qp.rq_pgtbl_virt) { 1212 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1213 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1214 ep->qp.rq_pgtbl_virt = NULL; 1215 ep->qp.rq_pgtbl_phys = 0; 1216 } 1217 if (ep->qp.rq_virt) { 1218 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1219 ep->qp.rq_virt, ep->qp.rq_phys); 1220 ep->qp.rq_virt = NULL; 1221 ep->qp.rq_phys = 0; 1222 } 1223 1224 /* Free CQ mem */ 1225 if (ep->qp.cq_pgtbl_virt) { 1226 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1227 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1228 ep->qp.cq_pgtbl_virt = NULL; 1229 ep->qp.cq_pgtbl_phys = 0; 1230 } 1231 if (ep->qp.cq_virt) { 1232 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1233 ep->qp.cq_virt, ep->qp.cq_phys); 1234 ep->qp.cq_virt = NULL; 1235 ep->qp.cq_phys = 0; 1236 } 1237 } 1238 1239 1240 /** 1241 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1242 * @hba: adapter structure pointer 1243 * 1244 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1245 * This results in iSCSi support validation and on-chip context manager 1246 * initialization. Firmware completes this handshake with a CQE carrying 1247 * the result of iscsi support validation. Parameter carried by 1248 * iscsi init request determines the number of offloaded connection and 1249 * tolerance level for iscsi protocol violation this hba/chip can support 1250 */ 1251 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1252 { 1253 struct kwqe *kwqe_arr[3]; 1254 struct iscsi_kwqe_init1 iscsi_init; 1255 struct iscsi_kwqe_init2 iscsi_init2; 1256 int rc = 0; 1257 u64 mask64; 1258 1259 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1)); 1260 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2)); 1261 1262 bnx2i_adjust_qp_size(hba); 1263 1264 iscsi_init.flags = 1265 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1266 if (en_tcp_dack) 1267 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1268 iscsi_init.reserved0 = 0; 1269 iscsi_init.num_cqs = 1; 1270 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1271 iscsi_init.hdr.flags = 1272 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1273 1274 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1275 iscsi_init.dummy_buffer_addr_hi = 1276 (u32) ((u64) hba->dummy_buf_dma >> 32); 1277 1278 hba->num_ccell = hba->max_sqes >> 1; 1279 hba->ctx_ccell_tasks = 1280 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1281 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1282 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1283 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1284 iscsi_init.sq_num_wqes = hba->max_sqes; 1285 iscsi_init.cq_log_wqes_per_page = 1286 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE); 1287 iscsi_init.cq_num_wqes = hba->max_cqes; 1288 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1289 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1290 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1291 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1292 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1293 iscsi_init.rq_num_wqes = hba->max_rqes; 1294 1295 1296 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1297 iscsi_init2.hdr.flags = 1298 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1299 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1300 mask64 = 0x0ULL; 1301 mask64 |= ( 1302 /* CISCO MDS */ 1303 (1UL << 1304 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1305 /* HP MSA1510i */ 1306 (1UL << 1307 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1308 /* EMC */ 1309 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1310 if (error_mask1) { 1311 iscsi_init2.error_bit_map[0] = error_mask1; 1312 mask64 ^= (u32)(mask64); 1313 mask64 |= error_mask1; 1314 } else 1315 iscsi_init2.error_bit_map[0] = (u32) mask64; 1316 1317 if (error_mask2) { 1318 iscsi_init2.error_bit_map[1] = error_mask2; 1319 mask64 &= 0xffffffff; 1320 mask64 |= ((u64)error_mask2 << 32); 1321 } else 1322 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1323 1324 iscsi_error_mask = mask64; 1325 1326 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1327 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1328 1329 if (hba->cnic && hba->cnic->submit_kwqes) 1330 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1331 return rc; 1332 } 1333 1334 1335 /** 1336 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1337 * @session: iscsi session 1338 * @bnx2i_conn: bnx2i connection 1339 * @cqe: pointer to newly DMA'ed CQE entry for processing 1340 * 1341 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1342 */ 1343 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1344 struct bnx2i_conn *bnx2i_conn, 1345 struct cqe *cqe) 1346 { 1347 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1348 struct bnx2i_hba *hba = bnx2i_conn->hba; 1349 struct bnx2i_cmd_response *resp_cqe; 1350 struct bnx2i_cmd *bnx2i_cmd; 1351 struct iscsi_task *task; 1352 struct iscsi_scsi_rsp *hdr; 1353 u32 datalen = 0; 1354 1355 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1356 spin_lock_bh(&session->back_lock); 1357 task = iscsi_itt_to_task(conn, 1358 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1359 if (!task) 1360 goto fail; 1361 1362 bnx2i_cmd = task->dd_data; 1363 1364 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { 1365 conn->datain_pdus_cnt += 1366 resp_cqe->task_stat.read_stat.num_data_ins; 1367 conn->rxdata_octets += 1368 bnx2i_cmd->req.total_data_transfer_length; 1369 ADD_STATS_64(hba, rx_pdus, 1370 resp_cqe->task_stat.read_stat.num_data_ins); 1371 ADD_STATS_64(hba, rx_bytes, 1372 bnx2i_cmd->req.total_data_transfer_length); 1373 } else { 1374 conn->dataout_pdus_cnt += 1375 resp_cqe->task_stat.write_stat.num_data_outs; 1376 conn->r2t_pdus_cnt += 1377 resp_cqe->task_stat.write_stat.num_r2ts; 1378 conn->txdata_octets += 1379 bnx2i_cmd->req.total_data_transfer_length; 1380 ADD_STATS_64(hba, tx_pdus, 1381 resp_cqe->task_stat.write_stat.num_data_outs); 1382 ADD_STATS_64(hba, tx_bytes, 1383 bnx2i_cmd->req.total_data_transfer_length); 1384 ADD_STATS_64(hba, rx_pdus, 1385 resp_cqe->task_stat.write_stat.num_r2ts); 1386 } 1387 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1388 1389 hdr = (struct iscsi_scsi_rsp *)task->hdr; 1390 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1391 hdr->opcode = resp_cqe->op_code; 1392 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1393 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1394 hdr->response = resp_cqe->response; 1395 hdr->cmd_status = resp_cqe->status; 1396 hdr->flags = resp_cqe->response_flags; 1397 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1398 1399 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1400 goto done; 1401 1402 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1403 datalen = resp_cqe->data_length; 1404 if (datalen < 2) 1405 goto done; 1406 1407 if (datalen > BNX2I_RQ_WQE_SIZE) { 1408 iscsi_conn_printk(KERN_ERR, conn, 1409 "sense data len %d > RQ sz\n", 1410 datalen); 1411 datalen = BNX2I_RQ_WQE_SIZE; 1412 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1413 iscsi_conn_printk(KERN_ERR, conn, 1414 "sense data len %d > conn data\n", 1415 datalen); 1416 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1417 } 1418 1419 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1420 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1421 } 1422 1423 done: 1424 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1425 conn->data, datalen); 1426 fail: 1427 spin_unlock_bh(&session->back_lock); 1428 return 0; 1429 } 1430 1431 1432 /** 1433 * bnx2i_process_login_resp - this function handles iscsi login response 1434 * @session: iscsi session pointer 1435 * @bnx2i_conn: iscsi connection pointer 1436 * @cqe: pointer to newly DMA'ed CQE entry for processing 1437 * 1438 * process Login Response CQE & complete it to open-iscsi user daemon 1439 */ 1440 static int bnx2i_process_login_resp(struct iscsi_session *session, 1441 struct bnx2i_conn *bnx2i_conn, 1442 struct cqe *cqe) 1443 { 1444 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1445 struct iscsi_task *task; 1446 struct bnx2i_login_response *login; 1447 struct iscsi_login_rsp *resp_hdr; 1448 int pld_len; 1449 int pad_len; 1450 1451 login = (struct bnx2i_login_response *) cqe; 1452 spin_lock(&session->back_lock); 1453 task = iscsi_itt_to_task(conn, 1454 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1455 if (!task) 1456 goto done; 1457 1458 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1459 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1460 resp_hdr->opcode = login->op_code; 1461 resp_hdr->flags = login->response_flags; 1462 resp_hdr->max_version = login->version_max; 1463 resp_hdr->active_version = login->version_active; 1464 resp_hdr->hlength = 0; 1465 1466 hton24(resp_hdr->dlength, login->data_length); 1467 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1468 resp_hdr->tsih = cpu_to_be16(login->tsih); 1469 resp_hdr->itt = task->hdr->itt; 1470 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1471 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1472 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1473 resp_hdr->status_class = login->status_class; 1474 resp_hdr->status_detail = login->status_detail; 1475 pld_len = login->data_length; 1476 bnx2i_conn->gen_pdu.resp_wr_ptr = 1477 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1478 1479 pad_len = 0; 1480 if (pld_len & 0x3) 1481 pad_len = 4 - (pld_len % 4); 1482 1483 if (pad_len) { 1484 int i = 0; 1485 for (i = 0; i < pad_len; i++) { 1486 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1487 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1488 } 1489 } 1490 1491 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1492 bnx2i_conn->gen_pdu.resp_buf, 1493 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1494 done: 1495 spin_unlock(&session->back_lock); 1496 return 0; 1497 } 1498 1499 1500 /** 1501 * bnx2i_process_text_resp - this function handles iscsi text response 1502 * @session: iscsi session pointer 1503 * @bnx2i_conn: iscsi connection pointer 1504 * @cqe: pointer to newly DMA'ed CQE entry for processing 1505 * 1506 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon 1507 */ 1508 static int bnx2i_process_text_resp(struct iscsi_session *session, 1509 struct bnx2i_conn *bnx2i_conn, 1510 struct cqe *cqe) 1511 { 1512 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1513 struct iscsi_task *task; 1514 struct bnx2i_text_response *text; 1515 struct iscsi_text_rsp *resp_hdr; 1516 int pld_len; 1517 int pad_len; 1518 1519 text = (struct bnx2i_text_response *) cqe; 1520 spin_lock(&session->back_lock); 1521 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1522 if (!task) 1523 goto done; 1524 1525 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; 1526 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1527 resp_hdr->opcode = text->op_code; 1528 resp_hdr->flags = text->response_flags; 1529 resp_hdr->hlength = 0; 1530 1531 hton24(resp_hdr->dlength, text->data_length); 1532 resp_hdr->itt = task->hdr->itt; 1533 resp_hdr->ttt = cpu_to_be32(text->ttt); 1534 resp_hdr->statsn = task->hdr->exp_statsn; 1535 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); 1536 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); 1537 pld_len = text->data_length; 1538 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + 1539 pld_len; 1540 pad_len = 0; 1541 if (pld_len & 0x3) 1542 pad_len = 4 - (pld_len % 4); 1543 1544 if (pad_len) { 1545 int i = 0; 1546 for (i = 0; i < pad_len; i++) { 1547 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1548 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1549 } 1550 } 1551 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1552 bnx2i_conn->gen_pdu.resp_buf, 1553 bnx2i_conn->gen_pdu.resp_wr_ptr - 1554 bnx2i_conn->gen_pdu.resp_buf); 1555 done: 1556 spin_unlock(&session->back_lock); 1557 return 0; 1558 } 1559 1560 1561 /** 1562 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1563 * @session: iscsi session pointer 1564 * @bnx2i_conn: iscsi connection pointer 1565 * @cqe: pointer to newly DMA'ed CQE entry for processing 1566 * 1567 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1568 */ 1569 static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1570 struct bnx2i_conn *bnx2i_conn, 1571 struct cqe *cqe) 1572 { 1573 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1574 struct iscsi_task *task; 1575 struct bnx2i_tmf_response *tmf_cqe; 1576 struct iscsi_tm_rsp *resp_hdr; 1577 1578 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1579 spin_lock(&session->back_lock); 1580 task = iscsi_itt_to_task(conn, 1581 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1582 if (!task) 1583 goto done; 1584 1585 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1586 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1587 resp_hdr->opcode = tmf_cqe->op_code; 1588 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1589 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1590 resp_hdr->itt = task->hdr->itt; 1591 resp_hdr->response = tmf_cqe->response; 1592 1593 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1594 done: 1595 spin_unlock(&session->back_lock); 1596 return 0; 1597 } 1598 1599 /** 1600 * bnx2i_process_logout_resp - this function handles iscsi logout response 1601 * @session: iscsi session pointer 1602 * @bnx2i_conn: iscsi connection pointer 1603 * @cqe: pointer to newly DMA'ed CQE entry for processing 1604 * 1605 * process iSCSI Logout Response CQE & make function call to 1606 * notify the user daemon. 1607 */ 1608 static int bnx2i_process_logout_resp(struct iscsi_session *session, 1609 struct bnx2i_conn *bnx2i_conn, 1610 struct cqe *cqe) 1611 { 1612 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1613 struct iscsi_task *task; 1614 struct bnx2i_logout_response *logout; 1615 struct iscsi_logout_rsp *resp_hdr; 1616 1617 logout = (struct bnx2i_logout_response *) cqe; 1618 spin_lock(&session->back_lock); 1619 task = iscsi_itt_to_task(conn, 1620 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1621 if (!task) 1622 goto done; 1623 1624 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1625 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1626 resp_hdr->opcode = logout->op_code; 1627 resp_hdr->flags = logout->response; 1628 resp_hdr->hlength = 0; 1629 1630 resp_hdr->itt = task->hdr->itt; 1631 resp_hdr->statsn = task->hdr->exp_statsn; 1632 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1633 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1634 1635 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1636 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1637 1638 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1639 1640 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1641 done: 1642 spin_unlock(&session->back_lock); 1643 return 0; 1644 } 1645 1646 /** 1647 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1648 * @session: iscsi session pointer 1649 * @bnx2i_conn: iscsi connection pointer 1650 * @cqe: pointer to newly DMA'ed CQE entry for processing 1651 * 1652 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1653 */ 1654 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1655 struct bnx2i_conn *bnx2i_conn, 1656 struct cqe *cqe) 1657 { 1658 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1659 struct bnx2i_nop_in_msg *nop_in; 1660 struct iscsi_task *task; 1661 1662 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1663 spin_lock(&session->back_lock); 1664 task = iscsi_itt_to_task(conn, 1665 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1666 if (task) 1667 __iscsi_put_task(task); 1668 spin_unlock(&session->back_lock); 1669 } 1670 1671 /** 1672 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1673 * @conn: iscsi connection 1674 * 1675 * Firmware advances RQ producer index for every unsolicited PDU even if 1676 * payload data length is '0'. This function makes corresponding 1677 * adjustments on the driver side to match this f/w behavior 1678 */ 1679 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1680 { 1681 char dummy_rq_data[2]; 1682 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1683 bnx2i_put_rq_buf(bnx2i_conn, 1); 1684 } 1685 1686 1687 /** 1688 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1689 * @session: iscsi session pointer 1690 * @bnx2i_conn: iscsi connection pointer 1691 * @cqe: pointer to newly DMA'ed CQE entry for processing 1692 * 1693 * process iSCSI target's proactive iSCSI NOPIN request 1694 */ 1695 static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1696 struct bnx2i_conn *bnx2i_conn, 1697 struct cqe *cqe) 1698 { 1699 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1700 struct iscsi_task *task; 1701 struct bnx2i_nop_in_msg *nop_in; 1702 struct iscsi_nopin *hdr; 1703 int tgt_async_nop = 0; 1704 1705 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1706 1707 spin_lock(&session->back_lock); 1708 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1709 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1710 hdr->opcode = nop_in->op_code; 1711 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1712 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1713 hdr->ttt = cpu_to_be32(nop_in->ttt); 1714 1715 if (nop_in->itt == (u16) RESERVED_ITT) { 1716 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1717 hdr->itt = RESERVED_ITT; 1718 tgt_async_nop = 1; 1719 goto done; 1720 } 1721 1722 /* this is a response to one of our nop-outs */ 1723 task = iscsi_itt_to_task(conn, 1724 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1725 if (task) { 1726 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1727 hdr->itt = task->hdr->itt; 1728 hdr->ttt = cpu_to_be32(nop_in->ttt); 1729 memcpy(&hdr->lun, nop_in->lun, 8); 1730 } 1731 done: 1732 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1733 spin_unlock(&session->back_lock); 1734 1735 return tgt_async_nop; 1736 } 1737 1738 1739 /** 1740 * bnx2i_process_async_mesg - this function handles iscsi async message 1741 * @session: iscsi session pointer 1742 * @bnx2i_conn: iscsi connection pointer 1743 * @cqe: pointer to newly DMA'ed CQE entry for processing 1744 * 1745 * process iSCSI ASYNC Message 1746 */ 1747 static void bnx2i_process_async_mesg(struct iscsi_session *session, 1748 struct bnx2i_conn *bnx2i_conn, 1749 struct cqe *cqe) 1750 { 1751 struct bnx2i_async_msg *async_cqe; 1752 struct iscsi_async *resp_hdr; 1753 u8 async_event; 1754 1755 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1756 1757 async_cqe = (struct bnx2i_async_msg *)cqe; 1758 async_event = async_cqe->async_event; 1759 1760 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1761 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1762 "async: scsi events not supported\n"); 1763 return; 1764 } 1765 1766 spin_lock(&session->back_lock); 1767 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1768 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1769 resp_hdr->opcode = async_cqe->op_code; 1770 resp_hdr->flags = 0x80; 1771 1772 memcpy(&resp_hdr->lun, async_cqe->lun, 8); 1773 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1774 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1775 1776 resp_hdr->async_event = async_cqe->async_event; 1777 resp_hdr->async_vcode = async_cqe->async_vcode; 1778 1779 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1780 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1781 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1782 1783 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1784 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1785 spin_unlock(&session->back_lock); 1786 } 1787 1788 1789 /** 1790 * bnx2i_process_reject_mesg - process iscsi reject pdu 1791 * @session: iscsi session pointer 1792 * @bnx2i_conn: iscsi connection pointer 1793 * @cqe: pointer to newly DMA'ed CQE entry for processing 1794 * 1795 * process iSCSI REJECT message 1796 */ 1797 static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1798 struct bnx2i_conn *bnx2i_conn, 1799 struct cqe *cqe) 1800 { 1801 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1802 struct bnx2i_reject_msg *reject; 1803 struct iscsi_reject *hdr; 1804 1805 reject = (struct bnx2i_reject_msg *) cqe; 1806 if (reject->data_length) { 1807 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1808 bnx2i_put_rq_buf(bnx2i_conn, 1); 1809 } else 1810 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1811 1812 spin_lock(&session->back_lock); 1813 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1814 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1815 hdr->opcode = reject->op_code; 1816 hdr->reason = reject->reason; 1817 hton24(hdr->dlength, reject->data_length); 1818 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1819 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1820 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1821 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1822 reject->data_length); 1823 spin_unlock(&session->back_lock); 1824 } 1825 1826 /** 1827 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1828 * @session: iscsi session pointer 1829 * @bnx2i_conn: iscsi connection pointer 1830 * @cqe: pointer to newly DMA'ed CQE entry for processing 1831 * 1832 * process command cleanup response CQE during conn shutdown or error recovery 1833 */ 1834 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1835 struct bnx2i_conn *bnx2i_conn, 1836 struct cqe *cqe) 1837 { 1838 struct bnx2i_cleanup_response *cmd_clean_rsp; 1839 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1840 struct iscsi_task *task; 1841 1842 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1843 spin_lock(&session->back_lock); 1844 task = iscsi_itt_to_task(conn, 1845 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1846 if (!task) 1847 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1848 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1849 spin_unlock(&session->back_lock); 1850 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1851 } 1852 1853 1854 /** 1855 * bnx2i_percpu_io_thread - thread per cpu for ios 1856 * 1857 * @arg: ptr to bnx2i_percpu_info structure 1858 */ 1859 int bnx2i_percpu_io_thread(void *arg) 1860 { 1861 struct bnx2i_percpu_s *p = arg; 1862 struct bnx2i_work *work, *tmp; 1863 LIST_HEAD(work_list); 1864 1865 set_user_nice(current, MIN_NICE); 1866 1867 while (!kthread_should_stop()) { 1868 spin_lock_bh(&p->p_work_lock); 1869 while (!list_empty(&p->work_list)) { 1870 list_splice_init(&p->work_list, &work_list); 1871 spin_unlock_bh(&p->p_work_lock); 1872 1873 list_for_each_entry_safe(work, tmp, &work_list, list) { 1874 list_del_init(&work->list); 1875 /* work allocated in the bh, freed here */ 1876 bnx2i_process_scsi_cmd_resp(work->session, 1877 work->bnx2i_conn, 1878 &work->cqe); 1879 atomic_dec(&work->bnx2i_conn->work_cnt); 1880 kfree(work); 1881 } 1882 spin_lock_bh(&p->p_work_lock); 1883 } 1884 set_current_state(TASK_INTERRUPTIBLE); 1885 spin_unlock_bh(&p->p_work_lock); 1886 schedule(); 1887 } 1888 __set_current_state(TASK_RUNNING); 1889 1890 return 0; 1891 } 1892 1893 1894 /** 1895 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread 1896 * @bnx2i_conn: bnx2i connection 1897 * 1898 * this function is called by generic KCQ handler to queue all pending cmd 1899 * completion CQEs 1900 * 1901 * The implementation is to queue the cmd response based on the 1902 * last recorded command for the given connection. The 1903 * cpu_id gets recorded upon task_xmit. No out-of-order completion! 1904 */ 1905 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, 1906 struct bnx2i_conn *bnx2i_conn, 1907 struct bnx2i_nop_in_msg *cqe) 1908 { 1909 struct bnx2i_work *bnx2i_work = NULL; 1910 struct bnx2i_percpu_s *p = NULL; 1911 struct iscsi_task *task; 1912 struct scsi_cmnd *sc; 1913 int rc = 0; 1914 int cpu; 1915 1916 spin_lock(&session->back_lock); 1917 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, 1918 cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1919 if (!task || !task->sc) { 1920 spin_unlock(&session->back_lock); 1921 return -EINVAL; 1922 } 1923 sc = task->sc; 1924 1925 if (!blk_rq_cpu_valid(sc->request)) 1926 cpu = smp_processor_id(); 1927 else 1928 cpu = sc->request->cpu; 1929 1930 spin_unlock(&session->back_lock); 1931 1932 p = &per_cpu(bnx2i_percpu, cpu); 1933 spin_lock(&p->p_work_lock); 1934 if (unlikely(!p->iothread)) { 1935 rc = -EINVAL; 1936 goto err; 1937 } 1938 /* Alloc and copy to the cqe */ 1939 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC); 1940 if (bnx2i_work) { 1941 INIT_LIST_HEAD(&bnx2i_work->list); 1942 bnx2i_work->session = session; 1943 bnx2i_work->bnx2i_conn = bnx2i_conn; 1944 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe)); 1945 list_add_tail(&bnx2i_work->list, &p->work_list); 1946 atomic_inc(&bnx2i_conn->work_cnt); 1947 wake_up_process(p->iothread); 1948 spin_unlock(&p->p_work_lock); 1949 goto done; 1950 } else 1951 rc = -ENOMEM; 1952 err: 1953 spin_unlock(&p->p_work_lock); 1954 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe); 1955 done: 1956 return rc; 1957 } 1958 1959 1960 /** 1961 * bnx2i_process_new_cqes - process newly DMA'ed CQE's 1962 * @bnx2i_conn: bnx2i connection 1963 * 1964 * this function is called by generic KCQ handler to process all pending CQE's 1965 */ 1966 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) 1967 { 1968 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1969 struct iscsi_session *session = conn->session; 1970 struct bnx2i_hba *hba = bnx2i_conn->hba; 1971 struct qp_info *qp; 1972 struct bnx2i_nop_in_msg *nopin; 1973 int tgt_async_msg; 1974 int cqe_cnt = 0; 1975 1976 if (bnx2i_conn->ep == NULL) 1977 return 0; 1978 1979 qp = &bnx2i_conn->ep->qp; 1980 1981 if (!qp->cq_virt) { 1982 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", 1983 hba->netdev->name); 1984 goto out; 1985 } 1986 while (1) { 1987 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1988 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1989 break; 1990 1991 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { 1992 if (nopin->op_code == ISCSI_OP_NOOP_IN && 1993 nopin->itt == (u16) RESERVED_ITT) { 1994 printk(KERN_ALERT "bnx2i: Unsolicited " 1995 "NOP-In detected for suspended " 1996 "connection dev=%s!\n", 1997 hba->netdev->name); 1998 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1999 goto cqe_out; 2000 } 2001 break; 2002 } 2003 tgt_async_msg = 0; 2004 2005 switch (nopin->op_code) { 2006 case ISCSI_OP_SCSI_CMD_RSP: 2007 case ISCSI_OP_SCSI_DATA_IN: 2008 /* Run the kthread engine only for data cmds 2009 All other cmds will be completed in this bh! */ 2010 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); 2011 goto done; 2012 case ISCSI_OP_LOGIN_RSP: 2013 bnx2i_process_login_resp(session, bnx2i_conn, 2014 qp->cq_cons_qe); 2015 break; 2016 case ISCSI_OP_SCSI_TMFUNC_RSP: 2017 bnx2i_process_tmf_resp(session, bnx2i_conn, 2018 qp->cq_cons_qe); 2019 break; 2020 case ISCSI_OP_TEXT_RSP: 2021 bnx2i_process_text_resp(session, bnx2i_conn, 2022 qp->cq_cons_qe); 2023 break; 2024 case ISCSI_OP_LOGOUT_RSP: 2025 bnx2i_process_logout_resp(session, bnx2i_conn, 2026 qp->cq_cons_qe); 2027 break; 2028 case ISCSI_OP_NOOP_IN: 2029 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 2030 qp->cq_cons_qe)) 2031 tgt_async_msg = 1; 2032 break; 2033 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 2034 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 2035 qp->cq_cons_qe); 2036 break; 2037 case ISCSI_OP_ASYNC_EVENT: 2038 bnx2i_process_async_mesg(session, bnx2i_conn, 2039 qp->cq_cons_qe); 2040 tgt_async_msg = 1; 2041 break; 2042 case ISCSI_OP_REJECT: 2043 bnx2i_process_reject_mesg(session, bnx2i_conn, 2044 qp->cq_cons_qe); 2045 break; 2046 case ISCSI_OPCODE_CLEANUP_RESPONSE: 2047 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 2048 qp->cq_cons_qe); 2049 break; 2050 default: 2051 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2052 nopin->op_code); 2053 } 2054 2055 ADD_STATS_64(hba, rx_pdus, 1); 2056 ADD_STATS_64(hba, rx_bytes, nopin->data_length); 2057 done: 2058 if (!tgt_async_msg) { 2059 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) 2060 printk(KERN_ALERT "bnx2i (%s): no active cmd! " 2061 "op 0x%x\n", 2062 hba->netdev->name, 2063 nopin->op_code); 2064 else 2065 atomic_dec(&bnx2i_conn->ep->num_active_cmds); 2066 } 2067 cqe_out: 2068 /* clear out in production version only, till beta keep opcode 2069 * field intact, will be helpful in debugging (context dump) 2070 * nopin->op_code = 0; 2071 */ 2072 cqe_cnt++; 2073 qp->cqe_exp_seq_sn++; 2074 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 2075 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 2076 2077 if (qp->cq_cons_qe == qp->cq_last_qe) { 2078 qp->cq_cons_qe = qp->cq_first_qe; 2079 qp->cq_cons_idx = 0; 2080 } else { 2081 qp->cq_cons_qe++; 2082 qp->cq_cons_idx++; 2083 } 2084 } 2085 out: 2086 return cqe_cnt; 2087 } 2088 2089 /** 2090 * bnx2i_fastpath_notification - process global event queue (KCQ) 2091 * @hba: adapter structure pointer 2092 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 2093 * 2094 * Fast path event notification handler, KCQ entry carries context id 2095 * of the connection that has 1 or more pending CQ entries 2096 */ 2097 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 2098 struct iscsi_kcqe *new_cqe_kcqe) 2099 { 2100 struct bnx2i_conn *bnx2i_conn; 2101 u32 iscsi_cid; 2102 int nxt_idx; 2103 2104 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 2105 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2106 2107 if (!bnx2i_conn) { 2108 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 2109 return; 2110 } 2111 if (!bnx2i_conn->ep) { 2112 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 2113 return; 2114 } 2115 2116 bnx2i_process_new_cqes(bnx2i_conn); 2117 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, 2118 CNIC_ARM_CQE_FP); 2119 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) 2120 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); 2121 } 2122 2123 2124 /** 2125 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 2126 * @hba: adapter structure pointer 2127 * @update_kcqe: kcqe pointer 2128 * 2129 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 2130 */ 2131 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 2132 struct iscsi_kcqe *update_kcqe) 2133 { 2134 struct bnx2i_conn *conn; 2135 u32 iscsi_cid; 2136 2137 iscsi_cid = update_kcqe->iscsi_conn_id; 2138 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2139 2140 if (!conn) { 2141 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 2142 return; 2143 } 2144 if (!conn->ep) { 2145 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 2146 return; 2147 } 2148 2149 if (update_kcqe->completion_status) { 2150 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 2151 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 2152 } else 2153 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 2154 2155 wake_up_interruptible(&conn->ep->ofld_wait); 2156 } 2157 2158 2159 /** 2160 * bnx2i_recovery_que_add_conn - add connection to recovery queue 2161 * @hba: adapter structure pointer 2162 * @bnx2i_conn: iscsi connection 2163 * 2164 * Add connection to recovery queue and schedule adapter eh worker 2165 */ 2166 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 2167 struct bnx2i_conn *bnx2i_conn) 2168 { 2169 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 2170 ISCSI_ERR_CONN_FAILED); 2171 } 2172 2173 2174 /** 2175 * bnx2i_process_tcp_error - process error notification on a given connection 2176 * 2177 * @hba: adapter structure pointer 2178 * @tcp_err: tcp error kcqe pointer 2179 * 2180 * handles tcp level error notifications from FW. 2181 */ 2182 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 2183 struct iscsi_kcqe *tcp_err) 2184 { 2185 struct bnx2i_conn *bnx2i_conn; 2186 u32 iscsi_cid; 2187 2188 iscsi_cid = tcp_err->iscsi_conn_id; 2189 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2190 2191 if (!bnx2i_conn) { 2192 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2193 return; 2194 } 2195 2196 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 2197 iscsi_cid, tcp_err->completion_status); 2198 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2199 } 2200 2201 2202 /** 2203 * bnx2i_process_iscsi_error - process error notification on a given connection 2204 * @hba: adapter structure pointer 2205 * @iscsi_err: iscsi error kcqe pointer 2206 * 2207 * handles iscsi error notifications from the FW. Firmware based in initial 2208 * handshake classifies iscsi protocol / TCP rfc violation into either 2209 * warning or error indications. If indication is of "Error" type, driver 2210 * will initiate session recovery for that connection/session. For 2211 * "Warning" type indication, driver will put out a system log message 2212 * (there will be only one message for each type for the life of the 2213 * session, this is to avoid un-necessarily overloading the system) 2214 */ 2215 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 2216 struct iscsi_kcqe *iscsi_err) 2217 { 2218 struct bnx2i_conn *bnx2i_conn; 2219 u32 iscsi_cid; 2220 char warn_notice[] = "iscsi_warning"; 2221 char error_notice[] = "iscsi_error"; 2222 char additional_notice[64]; 2223 char *message; 2224 int need_recovery; 2225 u64 err_mask64; 2226 2227 iscsi_cid = iscsi_err->iscsi_conn_id; 2228 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2229 if (!bnx2i_conn) { 2230 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2231 return; 2232 } 2233 2234 err_mask64 = (0x1ULL << iscsi_err->completion_status); 2235 2236 if (err_mask64 & iscsi_error_mask) { 2237 need_recovery = 0; 2238 message = warn_notice; 2239 } else { 2240 need_recovery = 1; 2241 message = error_notice; 2242 } 2243 2244 switch (iscsi_err->completion_status) { 2245 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 2246 strcpy(additional_notice, "hdr digest err"); 2247 break; 2248 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 2249 strcpy(additional_notice, "data digest err"); 2250 break; 2251 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 2252 strcpy(additional_notice, "wrong opcode rcvd"); 2253 break; 2254 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 2255 strcpy(additional_notice, "AHS len > 0 rcvd"); 2256 break; 2257 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 2258 strcpy(additional_notice, "invalid ITT rcvd"); 2259 break; 2260 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 2261 strcpy(additional_notice, "wrong StatSN rcvd"); 2262 break; 2263 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 2264 strcpy(additional_notice, "wrong DataSN rcvd"); 2265 break; 2266 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 2267 strcpy(additional_notice, "pend R2T violation"); 2268 break; 2269 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 2270 strcpy(additional_notice, "ERL0, UO"); 2271 break; 2272 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2273 strcpy(additional_notice, "ERL0, U1"); 2274 break; 2275 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2276 strcpy(additional_notice, "ERL0, U2"); 2277 break; 2278 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2279 strcpy(additional_notice, "ERL0, U3"); 2280 break; 2281 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2282 strcpy(additional_notice, "ERL0, U4"); 2283 break; 2284 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2285 strcpy(additional_notice, "ERL0, U5"); 2286 break; 2287 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2288 strcpy(additional_notice, "ERL0, U6"); 2289 break; 2290 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2291 strcpy(additional_notice, "invalid resi len"); 2292 break; 2293 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2294 strcpy(additional_notice, "MRDSL violation"); 2295 break; 2296 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2297 strcpy(additional_notice, "F-bit not set"); 2298 break; 2299 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2300 strcpy(additional_notice, "invalid TTT"); 2301 break; 2302 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2303 strcpy(additional_notice, "invalid DataSN"); 2304 break; 2305 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2306 strcpy(additional_notice, "burst len violation"); 2307 break; 2308 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2309 strcpy(additional_notice, "buf offset violation"); 2310 break; 2311 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2312 strcpy(additional_notice, "invalid LUN field"); 2313 break; 2314 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2315 strcpy(additional_notice, "invalid R2TSN field"); 2316 break; 2317 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2318 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2319 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2320 strcpy(additional_notice, "invalid cmd len1"); 2321 break; 2322 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2323 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2324 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2325 strcpy(additional_notice, "invalid cmd len2"); 2326 break; 2327 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2328 strcpy(additional_notice, 2329 "pend r2t exceeds MaxOutstandingR2T value"); 2330 break; 2331 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2332 strcpy(additional_notice, "TTT is rsvd"); 2333 break; 2334 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2335 strcpy(additional_notice, "MBL violation"); 2336 break; 2337 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2338 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2339 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2340 strcpy(additional_notice, "data seg len != 0"); 2341 break; 2342 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2343 strcpy(additional_notice, "reject pdu len error"); 2344 break; 2345 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2346 strcpy(additional_notice, "async pdu len error"); 2347 break; 2348 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2349 strcpy(additional_notice, "nopin pdu len error"); 2350 break; 2351 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2352 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2353 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2354 strcpy(additional_notice, "pend r2t in cleanup"); 2355 break; 2356 2357 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2358 strcpy(additional_notice, "IP fragments rcvd"); 2359 break; 2360 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2361 strcpy(additional_notice, "IP options error"); 2362 break; 2363 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2364 strcpy(additional_notice, "urgent flag error"); 2365 break; 2366 default: 2367 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2368 iscsi_err->completion_status); 2369 } 2370 2371 if (need_recovery) { 2372 iscsi_conn_printk(KERN_ALERT, 2373 bnx2i_conn->cls_conn->dd_data, 2374 "bnx2i: %s - %s\n", 2375 message, additional_notice); 2376 2377 iscsi_conn_printk(KERN_ALERT, 2378 bnx2i_conn->cls_conn->dd_data, 2379 "conn_err - hostno %d conn %p, " 2380 "iscsi_cid %x cid %x\n", 2381 bnx2i_conn->hba->shost->host_no, 2382 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2383 bnx2i_conn->ep->ep_cid); 2384 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2385 } else 2386 if (!test_and_set_bit(iscsi_err->completion_status, 2387 (void *) &bnx2i_conn->violation_notified)) 2388 iscsi_conn_printk(KERN_ALERT, 2389 bnx2i_conn->cls_conn->dd_data, 2390 "bnx2i: %s - %s\n", 2391 message, additional_notice); 2392 } 2393 2394 2395 /** 2396 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2397 * @hba: adapter structure pointer 2398 * @conn_destroy: conn destroy kcqe pointer 2399 * 2400 * handles connection destroy completion request. 2401 */ 2402 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2403 struct iscsi_kcqe *conn_destroy) 2404 { 2405 struct bnx2i_endpoint *ep; 2406 2407 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2408 if (!ep) { 2409 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2410 "offload request, unexpected completion\n"); 2411 return; 2412 } 2413 2414 if (hba != ep->hba) { 2415 printk(KERN_ALERT "conn destroy- error hba mis-match\n"); 2416 return; 2417 } 2418 2419 if (conn_destroy->completion_status) { 2420 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2421 ep->state = EP_STATE_CLEANUP_FAILED; 2422 } else 2423 ep->state = EP_STATE_CLEANUP_CMPL; 2424 wake_up_interruptible(&ep->ofld_wait); 2425 } 2426 2427 2428 /** 2429 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2430 * @hba: adapter structure pointer 2431 * @ofld_kcqe: conn offload kcqe pointer 2432 * 2433 * handles initial connection offload completion, ep_connect() thread is 2434 * woken-up to continue with LLP connect process 2435 */ 2436 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2437 struct iscsi_kcqe *ofld_kcqe) 2438 { 2439 u32 cid_addr; 2440 struct bnx2i_endpoint *ep; 2441 u32 cid_num; 2442 2443 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2444 if (!ep) { 2445 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2446 return; 2447 } 2448 2449 if (hba != ep->hba) { 2450 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n"); 2451 return; 2452 } 2453 2454 if (ofld_kcqe->completion_status) { 2455 ep->state = EP_STATE_OFLD_FAILED; 2456 if (ofld_kcqe->completion_status == 2457 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2458 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2459 "to allocate iSCSI context resources\n", 2460 hba->netdev->name); 2461 else if (ofld_kcqe->completion_status == 2462 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2463 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2464 "opcode\n", hba->netdev->name); 2465 else if (ofld_kcqe->completion_status == 2466 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2467 /* error status code valid only for 5771x chipset */ 2468 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2469 else 2470 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2471 "error code %d\n", hba->netdev->name, 2472 ofld_kcqe->completion_status); 2473 } else { 2474 ep->state = EP_STATE_OFLD_COMPL; 2475 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2476 cid_num = bnx2i_get_cid_num(ep); 2477 ep->ep_cid = cid_addr; 2478 ep->qp.ctx_base = NULL; 2479 } 2480 wake_up_interruptible(&ep->ofld_wait); 2481 } 2482 2483 /** 2484 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE 2485 * @hba: adapter structure pointer 2486 * @update_kcqe: kcqe pointer 2487 * 2488 * Generic KCQ event handler/dispatcher 2489 */ 2490 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2491 u32 num_cqe) 2492 { 2493 struct bnx2i_hba *hba = context; 2494 int i = 0; 2495 struct iscsi_kcqe *ikcqe = NULL; 2496 2497 while (i < num_cqe) { 2498 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2499 2500 if (ikcqe->op_code == 2501 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2502 bnx2i_fastpath_notification(hba, ikcqe); 2503 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2504 bnx2i_process_ofld_cmpl(hba, ikcqe); 2505 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2506 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2507 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2508 if (ikcqe->completion_status != 2509 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2510 bnx2i_iscsi_license_error(hba, ikcqe->\ 2511 completion_status); 2512 else { 2513 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2514 bnx2i_get_link_state(hba); 2515 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2516 "ISCSI_INIT passed\n", 2517 (u8)hba->pcidev->bus->number, 2518 hba->pci_devno, 2519 (u8)hba->pci_func); 2520 2521 2522 } 2523 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2524 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2525 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2526 bnx2i_process_iscsi_error(hba, ikcqe); 2527 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2528 bnx2i_process_tcp_error(hba, ikcqe); 2529 else 2530 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2531 ikcqe->op_code); 2532 } 2533 } 2534 2535 2536 /** 2537 * bnx2i_indicate_netevent - Generic netdev event handler 2538 * @context: adapter structure pointer 2539 * @event: event type 2540 * @vlan_id: vlans id - associated vlan id with this event 2541 * 2542 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2543 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2544 */ 2545 static void bnx2i_indicate_netevent(void *context, unsigned long event, 2546 u16 vlan_id) 2547 { 2548 struct bnx2i_hba *hba = context; 2549 2550 /* Ignore all netevent coming from vlans */ 2551 if (vlan_id != 0) 2552 return; 2553 2554 switch (event) { 2555 case NETDEV_UP: 2556 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2557 bnx2i_send_fw_iscsi_init_msg(hba); 2558 break; 2559 case NETDEV_DOWN: 2560 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2561 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2562 break; 2563 case NETDEV_GOING_DOWN: 2564 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2565 iscsi_host_for_each_session(hba->shost, 2566 bnx2i_drop_session); 2567 break; 2568 case NETDEV_CHANGE: 2569 bnx2i_get_link_state(hba); 2570 break; 2571 default: 2572 ; 2573 } 2574 } 2575 2576 2577 /** 2578 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2579 * @cm_sk: cnic sock structure pointer 2580 * 2581 * function callback exported via bnx2i - cnic driver interface to 2582 * indicate completion of option-2 TCP connect request. 2583 */ 2584 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2585 { 2586 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2587 2588 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2589 ep->state = EP_STATE_CONNECT_FAILED; 2590 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2591 ep->state = EP_STATE_CONNECT_COMPL; 2592 else 2593 ep->state = EP_STATE_CONNECT_FAILED; 2594 2595 wake_up_interruptible(&ep->ofld_wait); 2596 } 2597 2598 2599 /** 2600 * bnx2i_cm_close_cmpl - process tcp conn close completion 2601 * @cm_sk: cnic sock structure pointer 2602 * 2603 * function callback exported via bnx2i - cnic driver interface to 2604 * indicate completion of option-2 graceful TCP connect shutdown 2605 */ 2606 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2607 { 2608 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2609 2610 ep->state = EP_STATE_DISCONN_COMPL; 2611 wake_up_interruptible(&ep->ofld_wait); 2612 } 2613 2614 2615 /** 2616 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2617 * @cm_sk: cnic sock structure pointer 2618 * 2619 * function callback exported via bnx2i - cnic driver interface to 2620 * indicate completion of option-2 abortive TCP connect termination 2621 */ 2622 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2623 { 2624 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2625 2626 ep->state = EP_STATE_DISCONN_COMPL; 2627 wake_up_interruptible(&ep->ofld_wait); 2628 } 2629 2630 2631 /** 2632 * bnx2i_cm_remote_close - process received TCP FIN 2633 * @hba: adapter structure pointer 2634 * @update_kcqe: kcqe pointer 2635 * 2636 * function callback exported via bnx2i - cnic driver interface to indicate 2637 * async TCP events such as FIN 2638 */ 2639 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2640 { 2641 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2642 2643 ep->state = EP_STATE_TCP_FIN_RCVD; 2644 if (ep->conn) 2645 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2646 } 2647 2648 /** 2649 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2650 * @hba: adapter structure pointer 2651 * @update_kcqe: kcqe pointer 2652 * 2653 * function callback exported via bnx2i - cnic driver interface to 2654 * indicate async TCP events (RST) sent by the peer. 2655 */ 2656 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2657 { 2658 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2659 u32 old_state = ep->state; 2660 2661 ep->state = EP_STATE_TCP_RST_RCVD; 2662 if (old_state == EP_STATE_DISCONN_START) 2663 wake_up_interruptible(&ep->ofld_wait); 2664 else 2665 if (ep->conn) 2666 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2667 } 2668 2669 2670 static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2671 char *buf, u16 buflen) 2672 { 2673 struct bnx2i_hba *hba = context; 2674 int rc; 2675 2676 if (!hba) 2677 return -ENODEV; 2678 2679 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2680 msg_type, buf, buflen); 2681 if (rc) 2682 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2683 2684 return rc; 2685 } 2686 2687 2688 /** 2689 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2690 * carrying callback function pointers 2691 * 2692 */ 2693 struct cnic_ulp_ops bnx2i_cnic_cb = { 2694 .cnic_init = bnx2i_ulp_init, 2695 .cnic_exit = bnx2i_ulp_exit, 2696 .cnic_start = bnx2i_start, 2697 .cnic_stop = bnx2i_stop, 2698 .indicate_kcqes = bnx2i_indicate_kcqe, 2699 .indicate_netevent = bnx2i_indicate_netevent, 2700 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2701 .cm_close_complete = bnx2i_cm_close_cmpl, 2702 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2703 .cm_remote_close = bnx2i_cm_remote_close, 2704 .cm_remote_abort = bnx2i_cm_remote_abort, 2705 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2706 .cnic_get_stats = bnx2i_get_stats, 2707 .owner = THIS_MODULE 2708 }; 2709 2710 2711 /** 2712 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2713 * @ep: bnx2i endpoint 2714 * 2715 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2716 * register in BAR #0. Whereas in 57710 these register are accessed by 2717 * mapping BAR #1 2718 */ 2719 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2720 { 2721 u32 cid_num; 2722 u32 reg_off; 2723 u32 first_l4l5; 2724 u32 ctx_sz; 2725 u32 config2; 2726 resource_size_t reg_base; 2727 2728 cid_num = bnx2i_get_cid_num(ep); 2729 2730 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2731 reg_base = pci_resource_start(ep->hba->pcidev, 2732 BNX2X_DOORBELL_PCI_BAR); 2733 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF); 2734 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4); 2735 goto arm_cq; 2736 } 2737 2738 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && 2739 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { 2740 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); 2741 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; 2742 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; 2743 if (ctx_sz) 2744 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE 2745 + BNX2I_570X_PAGE_SIZE_DEFAULT * 2746 (((cid_num - first_l4l5) / ctx_sz) + 256); 2747 else 2748 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2749 } else 2750 /* 5709 device in normal node and 5706/5708 devices */ 2751 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2752 2753 ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off, 2754 MB_KERNEL_CTX_SIZE); 2755 if (!ep->qp.ctx_base) 2756 return -ENOMEM; 2757 2758 arm_cq: 2759 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); 2760 return 0; 2761 } 2762