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 22DECLARE_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 */ 30static 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 */ 48static 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 */ 97static 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 */ 114static 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 */ 138int 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 * @bnx2i_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 */ 193void 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 210static 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 * @bnx2i_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 */ 231void 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} 257 258 259/** 260 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine 261 * @bnx2i_conn: iscsi connection to which new SQ entries belong 262 * @count: number of SQ WQEs to post 263 * 264 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family 265 * of devices. For 5706/5708/5709 new SQ WQE count is written into the 266 * doorbell register 267 */ 268static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) 269{ 270 struct bnx2i_5771x_sq_rq_db *sq_db; 271 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 272 273 atomic_inc(&ep->num_active_cmds); 274 wmb(); /* flush SQ WQE memory before the doorbell is rung */ 275 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 276 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; 277 sq_db->prod_idx = ep->qp.sq_prod_idx; 278 bnx2i_ring_577xx_doorbell(bnx2i_conn); 279 } else 280 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); 281} 282 283 284/** 285 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters 286 * @bnx2i_conn: iscsi connection to which new SQ entries belong 287 * @count: number of SQ WQEs to post 288 * 289 * this routine will update SQ driver parameters and ring the doorbell 290 */ 291static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, 292 int count) 293{ 294 int tmp_cnt; 295 296 if (count == 1) { 297 if (bnx2i_conn->ep->qp.sq_prod_qe == 298 bnx2i_conn->ep->qp.sq_last_qe) 299 bnx2i_conn->ep->qp.sq_prod_qe = 300 bnx2i_conn->ep->qp.sq_first_qe; 301 else 302 bnx2i_conn->ep->qp.sq_prod_qe++; 303 } else { 304 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= 305 bnx2i_conn->ep->qp.sq_last_qe) 306 bnx2i_conn->ep->qp.sq_prod_qe += count; 307 else { 308 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - 309 bnx2i_conn->ep->qp.sq_prod_qe; 310 bnx2i_conn->ep->qp.sq_prod_qe = 311 &bnx2i_conn->ep->qp.sq_first_qe[count - 312 (tmp_cnt + 1)]; 313 } 314 } 315 bnx2i_conn->ep->qp.sq_prod_idx += count; 316 /* Ring the doorbell */ 317 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); 318} 319 320 321/** 322 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware 323 * @bnx2i_conn: iscsi connection 324 * @task: transport layer's command structure pointer which is requesting 325 * a WQE to sent to chip for further processing 326 * 327 * prepare and post an iSCSI Login request WQE to CNIC firmware 328 */ 329int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, 330 struct iscsi_task *task) 331{ 332 struct bnx2i_login_request *login_wqe; 333 struct iscsi_login_req *login_hdr; 334 u32 dword; 335 336 login_hdr = (struct iscsi_login_req *)task->hdr; 337 login_wqe = (struct bnx2i_login_request *) 338 bnx2i_conn->ep->qp.sq_prod_qe; 339 340 login_wqe->op_code = login_hdr->opcode; 341 login_wqe->op_attr = login_hdr->flags; 342 login_wqe->version_max = login_hdr->max_version; 343 login_wqe->version_min = login_hdr->min_version; 344 login_wqe->data_length = ntoh24(login_hdr->dlength); 345 login_wqe->isid_lo = *((u32 *) login_hdr->isid); 346 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2); 347 login_wqe->tsih = login_hdr->tsih; 348 login_wqe->itt = task->itt | 349 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT); 350 login_wqe->cid = login_hdr->cid; 351 352 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn); 353 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); 354 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN; 355 356 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 357 login_wqe->resp_bd_list_addr_hi = 358 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 359 360 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) | 361 (bnx2i_conn->gen_pdu.resp_buf_size << 362 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 363 login_wqe->resp_buffer = dword; 364 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 365 login_wqe->bd_list_addr_hi = 366 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 367 login_wqe->num_bds = 1; 368 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 369 370 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 371 return 0; 372} 373 374/** 375 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware 376 * @bnx2i_conn: iscsi connection 377 * @mtask: driver command structure which is requesting 378 * a WQE to sent to chip for further processing 379 * 380 * prepare and post an iSCSI Login request WQE to CNIC firmware 381 */ 382int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn, 383 struct iscsi_task *mtask) 384{ 385 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 386 struct iscsi_tm *tmfabort_hdr; 387 struct scsi_cmnd *ref_sc; 388 struct iscsi_task *ctask; 389 struct bnx2i_tmf_request *tmfabort_wqe; 390 u32 dword; 391 u32 scsi_lun[2]; 392 393 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; 394 tmfabort_wqe = (struct bnx2i_tmf_request *) 395 bnx2i_conn->ep->qp.sq_prod_qe; 396 397 tmfabort_wqe->op_code = tmfabort_hdr->opcode; 398 tmfabort_wqe->op_attr = tmfabort_hdr->flags; 399 400 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); 401 tmfabort_wqe->reserved2 = 0; 402 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); 403 404 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { 405 case ISCSI_TM_FUNC_ABORT_TASK: 406 case ISCSI_TM_FUNC_TASK_REASSIGN: 407 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); 408 if (!ctask || !ctask->sc) 409 /* 410 * the iscsi layer must have completed the cmd while 411 * was starting up. 412 * 413 * Note: In the case of a SCSI cmd timeout, the task's 414 * sc is still active; hence ctask->sc != 0 415 * In this case, the task must be aborted 416 */ 417 return 0; 418 419 ref_sc = ctask->sc; 420 if (ref_sc->sc_data_direction == DMA_TO_DEVICE) 421 dword = (ISCSI_TASK_TYPE_WRITE << 422 ISCSI_CMD_REQUEST_TYPE_SHIFT); 423 else 424 dword = (ISCSI_TASK_TYPE_READ << 425 ISCSI_CMD_REQUEST_TYPE_SHIFT); 426 tmfabort_wqe->ref_itt = (dword | 427 (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); 428 break; 429 default: 430 tmfabort_wqe->ref_itt = RESERVED_ITT; 431 } 432 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun)); 433 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); 434 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); 435 436 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); 437 438 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 439 tmfabort_wqe->bd_list_addr_hi = (u32) 440 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 441 tmfabort_wqe->num_bds = 1; 442 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 443 444 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 445 return 0; 446} 447 448/** 449 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware 450 * @bnx2i_conn: iscsi connection 451 * @mtask: driver command structure which is requesting 452 * a WQE to sent to chip for further processing 453 * 454 * prepare and post an iSCSI Text request WQE to CNIC firmware 455 */ 456int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn, 457 struct iscsi_task *mtask) 458{ 459 struct bnx2i_text_request *text_wqe; 460 struct iscsi_text *text_hdr; 461 u32 dword; 462 463 text_hdr = (struct iscsi_text *)mtask->hdr; 464 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe; 465 466 memset(text_wqe, 0, sizeof(struct bnx2i_text_request)); 467 468 text_wqe->op_code = text_hdr->opcode; 469 text_wqe->op_attr = text_hdr->flags; 470 text_wqe->data_length = ntoh24(text_hdr->dlength); 471 text_wqe->itt = mtask->itt | 472 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT); 473 text_wqe->ttt = be32_to_cpu(text_hdr->ttt); 474 475 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn); 476 477 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 478 text_wqe->resp_bd_list_addr_hi = 479 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 480 481 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) | 482 (bnx2i_conn->gen_pdu.resp_buf_size << 483 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 484 text_wqe->resp_buffer = dword; 485 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 486 text_wqe->bd_list_addr_hi = 487 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 488 text_wqe->num_bds = 1; 489 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 490 491 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 492 return 0; 493} 494 495 496/** 497 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware 498 * @bnx2i_conn: iscsi connection 499 * @cmd: driver command structure which is requesting 500 * a WQE to sent to chip for further processing 501 * 502 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware 503 */ 504int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, 505 struct bnx2i_cmd *cmd) 506{ 507 struct bnx2i_cmd_request *scsi_cmd_wqe; 508 509 scsi_cmd_wqe = (struct bnx2i_cmd_request *) 510 bnx2i_conn->ep->qp.sq_prod_qe; 511 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); 512 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 513 514 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 515 return 0; 516} 517 518/** 519 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware 520 * @bnx2i_conn: iscsi connection 521 * @task: transport layer's command structure pointer which is 522 * requesting a WQE to sent to chip for further processing 523 * @datap: payload buffer pointer 524 * @data_len: payload data length 525 * @unsol: indicated whether nopout pdu is unsolicited pdu or 526 * in response to target's NOPIN w/ TTT != FFFFFFFF 527 * 528 * prepare and post a nopout request WQE to CNIC firmware 529 */ 530int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, 531 struct iscsi_task *task, 532 char *datap, int data_len, int unsol) 533{ 534 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 535 struct bnx2i_nop_out_request *nopout_wqe; 536 struct iscsi_nopout *nopout_hdr; 537 538 nopout_hdr = (struct iscsi_nopout *)task->hdr; 539 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; 540 541 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request)); 542 543 nopout_wqe->op_code = nopout_hdr->opcode; 544 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; 545 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8); 546 547 /* 57710 requires LUN field to be swapped */ 548 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 549 swap(nopout_wqe->lun[0], nopout_wqe->lun[1]); 550 551 nopout_wqe->itt = ((u16)task->itt | 552 (ISCSI_TASK_TYPE_MPATH << 553 ISCSI_TMF_REQUEST_TYPE_SHIFT)); 554 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt); 555 nopout_wqe->flags = 0; 556 if (!unsol) 557 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 558 else if (nopout_hdr->itt == RESERVED_ITT) 559 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 560 561 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 562 nopout_wqe->data_length = data_len; 563 if (data_len) { 564 /* handle payload data, not required in first release */ 565 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); 566 } else { 567 nopout_wqe->bd_list_addr_lo = (u32) 568 bnx2i_conn->hba->mp_bd_dma; 569 nopout_wqe->bd_list_addr_hi = 570 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 571 nopout_wqe->num_bds = 1; 572 } 573 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 574 575 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 576 return 0; 577} 578 579 580/** 581 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware 582 * @bnx2i_conn: iscsi connection 583 * @task: transport layer's command structure pointer which is 584 * requesting a WQE to sent to chip for further processing 585 * 586 * prepare and post logout request WQE to CNIC firmware 587 */ 588int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, 589 struct iscsi_task *task) 590{ 591 struct bnx2i_logout_request *logout_wqe; 592 struct iscsi_logout *logout_hdr; 593 594 logout_hdr = (struct iscsi_logout *)task->hdr; 595 596 logout_wqe = (struct bnx2i_logout_request *) 597 bnx2i_conn->ep->qp.sq_prod_qe; 598 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); 599 600 logout_wqe->op_code = logout_hdr->opcode; 601 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 602 logout_wqe->op_attr = 603 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; 604 logout_wqe->itt = ((u16)task->itt | 605 (ISCSI_TASK_TYPE_MPATH << 606 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); 607 logout_wqe->data_length = 0; 608 logout_wqe->cid = 0; 609 610 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 611 logout_wqe->bd_list_addr_hi = (u32) 612 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 613 logout_wqe->num_bds = 1; 614 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 615 616 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; 617 618 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 619 return 0; 620} 621 622 623/** 624 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware 625 * @conn: iscsi connection which requires iscsi parameter update 626 * 627 * sends down iSCSI Conn Update request to move iSCSI conn to FFP 628 */ 629void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) 630{ 631 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 632 struct bnx2i_hba *hba = bnx2i_conn->hba; 633 struct kwqe *kwqe_arr[2]; 634 struct iscsi_kwqe_conn_update *update_wqe; 635 struct iscsi_kwqe_conn_update conn_update_kwqe; 636 637 update_wqe = &conn_update_kwqe; 638 639 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; 640 update_wqe->hdr.flags = 641 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 642 643 /* 5771x requires conn context id to be passed as is */ 644 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) 645 update_wqe->context_id = bnx2i_conn->ep->ep_cid; 646 else 647 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); 648 update_wqe->conn_flags = 0; 649 if (conn->hdrdgst_en) 650 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; 651 if (conn->datadgst_en) 652 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; 653 if (conn->session->initial_r2t_en) 654 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; 655 if (conn->session->imm_data_en) 656 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; 657 658 update_wqe->max_send_pdu_length = conn->max_xmit_dlength; 659 update_wqe->max_recv_pdu_length = conn->max_recv_dlength; 660 update_wqe->first_burst_length = conn->session->first_burst; 661 update_wqe->max_burst_length = conn->session->max_burst; 662 update_wqe->exp_stat_sn = conn->exp_statsn; 663 update_wqe->max_outstanding_r2ts = conn->session->max_r2t; 664 update_wqe->session_error_recovery_level = conn->session->erl; 665 iscsi_conn_printk(KERN_ALERT, conn, 666 "bnx2i: conn update - MBL 0x%x FBL 0x%x" 667 "MRDSL_I 0x%x MRDSL_T 0x%x \n", 668 update_wqe->max_burst_length, 669 update_wqe->first_burst_length, 670 update_wqe->max_recv_pdu_length, 671 update_wqe->max_send_pdu_length); 672 673 kwqe_arr[0] = (struct kwqe *) update_wqe; 674 if (hba->cnic && hba->cnic->submit_kwqes) 675 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 676} 677 678 679/** 680 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware 681 * @t: timer context used to fetch the endpoint (transport 682 * handle) structure pointer 683 * 684 * routine to handle connection offload/destroy request timeout 685 */ 686void bnx2i_ep_ofld_timer(struct timer_list *t) 687{ 688 struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer); 689 690 if (ep->state == EP_STATE_OFLD_START) { 691 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); 692 ep->state = EP_STATE_OFLD_FAILED; 693 } else if (ep->state == EP_STATE_DISCONN_START) { 694 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); 695 ep->state = EP_STATE_DISCONN_TIMEDOUT; 696 } else if (ep->state == EP_STATE_CLEANUP_START) { 697 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); 698 ep->state = EP_STATE_CLEANUP_FAILED; 699 } 700 701 wake_up_interruptible(&ep->ofld_wait); 702} 703 704 705static int bnx2i_power_of2(u32 val) 706{ 707 u32 power = 0; 708 if (val & (val - 1)) 709 return power; 710 val--; 711 while (val) { 712 val = val >> 1; 713 power++; 714 } 715 return power; 716} 717 718 719/** 720 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request 721 * @hba: adapter structure pointer 722 * @cmd: driver command structure which is requesting 723 * a WQE to sent to chip for further processing 724 * 725 * prepares and posts CONN_OFLD_REQ1/2 KWQE 726 */ 727void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 728{ 729 struct bnx2i_cleanup_request *cmd_cleanup; 730 731 cmd_cleanup = 732 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; 733 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); 734 735 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; 736 cmd_cleanup->itt = cmd->req.itt; 737 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ 738 739 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); 740} 741 742 743/** 744 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process 745 * @hba: adapter structure pointer 746 * @ep: endpoint (transport identifier) structure 747 * 748 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate 749 * iscsi connection context clean-up process 750 */ 751int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 752{ 753 struct kwqe *kwqe_arr[2]; 754 struct iscsi_kwqe_conn_destroy conn_cleanup; 755 int rc = -EINVAL; 756 757 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); 758 759 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; 760 conn_cleanup.hdr.flags = 761 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 762 /* 5771x requires conn context id to be passed as is */ 763 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 764 conn_cleanup.context_id = ep->ep_cid; 765 else 766 conn_cleanup.context_id = (ep->ep_cid >> 7); 767 768 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; 769 770 kwqe_arr[0] = (struct kwqe *) &conn_cleanup; 771 if (hba->cnic && hba->cnic->submit_kwqes) 772 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 773 774 return rc; 775} 776 777 778/** 779 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process 780 * @hba: adapter structure pointer 781 * @ep: endpoint (transport identifier) structure 782 * 783 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 784 */ 785static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, 786 struct bnx2i_endpoint *ep) 787{ 788 struct kwqe *kwqe_arr[2]; 789 struct iscsi_kwqe_conn_offload1 ofld_req1; 790 struct iscsi_kwqe_conn_offload2 ofld_req2; 791 dma_addr_t dma_addr; 792 int num_kwqes = 2; 793 u32 *ptbl; 794 int rc = -EINVAL; 795 796 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 797 ofld_req1.hdr.flags = 798 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 799 800 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 801 802 dma_addr = ep->qp.sq_pgtbl_phys; 803 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 804 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 805 806 dma_addr = ep->qp.cq_pgtbl_phys; 807 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 808 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 809 810 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 811 ofld_req2.hdr.flags = 812 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 813 814 dma_addr = ep->qp.rq_pgtbl_phys; 815 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 816 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 817 818 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 819 820 ofld_req2.sq_first_pte.hi = *ptbl++; 821 ofld_req2.sq_first_pte.lo = *ptbl; 822 823 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 824 ofld_req2.cq_first_pte.hi = *ptbl++; 825 ofld_req2.cq_first_pte.lo = *ptbl; 826 827 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 828 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 829 ofld_req2.num_additional_wqes = 0; 830 831 if (hba->cnic && hba->cnic->submit_kwqes) 832 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 833 834 return rc; 835} 836 837 838/** 839 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation 840 * @hba: adapter structure pointer 841 * @ep: endpoint (transport identifier) structure 842 * 843 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 844 */ 845static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, 846 struct bnx2i_endpoint *ep) 847{ 848 struct kwqe *kwqe_arr[5]; 849 struct iscsi_kwqe_conn_offload1 ofld_req1; 850 struct iscsi_kwqe_conn_offload2 ofld_req2; 851 struct iscsi_kwqe_conn_offload3 ofld_req3[1]; 852 dma_addr_t dma_addr; 853 int num_kwqes = 2; 854 u32 *ptbl; 855 int rc = -EINVAL; 856 857 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 858 ofld_req1.hdr.flags = 859 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 860 861 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 862 863 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; 864 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 865 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 866 867 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; 868 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 869 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 870 871 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 872 ofld_req2.hdr.flags = 873 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 874 875 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; 876 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 877 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 878 879 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 880 ofld_req2.sq_first_pte.hi = *ptbl++; 881 ofld_req2.sq_first_pte.lo = *ptbl; 882 883 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 884 ofld_req2.cq_first_pte.hi = *ptbl++; 885 ofld_req2.cq_first_pte.lo = *ptbl; 886 887 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 888 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 889 890 ofld_req2.num_additional_wqes = 1; 891 memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); 892 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 893 ofld_req3[0].qp_first_pte[0].hi = *ptbl++; 894 ofld_req3[0].qp_first_pte[0].lo = *ptbl; 895 896 kwqe_arr[2] = (struct kwqe *) ofld_req3; 897 /* need if we decide to go with multiple KCQE's per conn */ 898 num_kwqes += 1; 899 900 if (hba->cnic && hba->cnic->submit_kwqes) 901 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 902 903 return rc; 904} 905 906/** 907 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process 908 * 909 * @hba: adapter structure pointer 910 * @ep: endpoint (transport identifier) structure 911 * 912 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE 913 */ 914int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 915{ 916 int rc; 917 918 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 919 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); 920 else 921 rc = bnx2i_570x_send_conn_ofld_req(hba, ep); 922 923 return rc; 924} 925 926 927/** 928 * setup_qp_page_tables - iscsi QP page table setup function 929 * @ep: endpoint (transport identifier) structure 930 * 931 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires 932 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires 933 * PT in little endian format 934 */ 935static void setup_qp_page_tables(struct bnx2i_endpoint *ep) 936{ 937 int num_pages; 938 u32 *ptbl; 939 dma_addr_t page; 940 int cnic_dev_10g; 941 942 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 943 cnic_dev_10g = 1; 944 else 945 cnic_dev_10g = 0; 946 947 /* SQ page table */ 948 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); 949 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE; 950 page = ep->qp.sq_phys; 951 952 if (cnic_dev_10g) 953 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 954 else 955 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 956 while (num_pages--) { 957 if (cnic_dev_10g) { 958 /* PTE is written in little endian format for 57710 */ 959 *ptbl = (u32) page; 960 ptbl++; 961 *ptbl = (u32) ((u64) page >> 32); 962 ptbl++; 963 page += CNIC_PAGE_SIZE; 964 } else { 965 /* PTE is written in big endian format for 966 * 5706/5708/5709 devices */ 967 *ptbl = (u32) ((u64) page >> 32); 968 ptbl++; 969 *ptbl = (u32) page; 970 ptbl++; 971 page += CNIC_PAGE_SIZE; 972 } 973 } 974 975 /* RQ page table */ 976 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); 977 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE; 978 page = ep->qp.rq_phys; 979 980 if (cnic_dev_10g) 981 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 982 else 983 ptbl = (u32 *) ep->qp.rq_pgtbl_virt; 984 while (num_pages--) { 985 if (cnic_dev_10g) { 986 /* PTE is written in little endian format for 57710 */ 987 *ptbl = (u32) page; 988 ptbl++; 989 *ptbl = (u32) ((u64) page >> 32); 990 ptbl++; 991 page += CNIC_PAGE_SIZE; 992 } else { 993 /* PTE is written in big endian format for 994 * 5706/5708/5709 devices */ 995 *ptbl = (u32) ((u64) page >> 32); 996 ptbl++; 997 *ptbl = (u32) page; 998 ptbl++; 999 page += CNIC_PAGE_SIZE; 1000 } 1001 } 1002 1003 /* CQ page table */ 1004 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); 1005 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE; 1006 page = ep->qp.cq_phys; 1007 1008 if (cnic_dev_10g) 1009 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 1010 else 1011 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 1012 while (num_pages--) { 1013 if (cnic_dev_10g) { 1014 /* PTE is written in little endian format for 57710 */ 1015 *ptbl = (u32) page; 1016 ptbl++; 1017 *ptbl = (u32) ((u64) page >> 32); 1018 ptbl++; 1019 page += CNIC_PAGE_SIZE; 1020 } else { 1021 /* PTE is written in big endian format for 1022 * 5706/5708/5709 devices */ 1023 *ptbl = (u32) ((u64) page >> 32); 1024 ptbl++; 1025 *ptbl = (u32) page; 1026 ptbl++; 1027 page += CNIC_PAGE_SIZE; 1028 } 1029 } 1030} 1031 1032 1033/** 1034 * bnx2i_alloc_qp_resc - allocates required resources for QP. 1035 * @hba: adapter structure pointer 1036 * @ep: endpoint (transport identifier) structure 1037 * 1038 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able 1039 * memory for SQ/RQ/CQ and page tables. EP structure elements such 1040 * as producer/consumer indexes/pointers, queue sizes and page table 1041 * contents are setup 1042 */ 1043int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1044{ 1045 struct bnx2i_5771x_cq_db *cq_db; 1046 1047 ep->hba = hba; 1048 ep->conn = NULL; 1049 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; 1050 1051 /* Allocate page table memory for SQ which is page aligned */ 1052 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; 1053 ep->qp.sq_mem_size = 1054 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1055 ep->qp.sq_pgtbl_size = 1056 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1057 ep->qp.sq_pgtbl_size = 1058 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1059 1060 ep->qp.sq_pgtbl_virt = 1061 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1062 &ep->qp.sq_pgtbl_phys, GFP_KERNEL); 1063 if (!ep->qp.sq_pgtbl_virt) { 1064 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", 1065 ep->qp.sq_pgtbl_size); 1066 goto mem_alloc_err; 1067 } 1068 1069 /* Allocate memory area for actual SQ element */ 1070 ep->qp.sq_virt = 1071 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1072 &ep->qp.sq_phys, GFP_KERNEL); 1073 if (!ep->qp.sq_virt) { 1074 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", 1075 ep->qp.sq_mem_size); 1076 goto mem_alloc_err; 1077 } 1078 1079 ep->qp.sq_first_qe = ep->qp.sq_virt; 1080 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1081 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1082 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1083 ep->qp.sq_prod_idx = 0; 1084 ep->qp.sq_cons_idx = 0; 1085 ep->qp.sqe_left = hba->max_sqes; 1086 1087 /* Allocate page table memory for CQ which is page aligned */ 1088 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1089 ep->qp.cq_mem_size = 1090 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1091 ep->qp.cq_pgtbl_size = 1092 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1093 ep->qp.cq_pgtbl_size = 1094 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1095 1096 ep->qp.cq_pgtbl_virt = 1097 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1098 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1099 if (!ep->qp.cq_pgtbl_virt) { 1100 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1101 ep->qp.cq_pgtbl_size); 1102 goto mem_alloc_err; 1103 } 1104 1105 /* Allocate memory area for actual CQ element */ 1106 ep->qp.cq_virt = 1107 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1108 &ep->qp.cq_phys, GFP_KERNEL); 1109 if (!ep->qp.cq_virt) { 1110 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1111 ep->qp.cq_mem_size); 1112 goto mem_alloc_err; 1113 } 1114 1115 ep->qp.cq_first_qe = ep->qp.cq_virt; 1116 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1117 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1118 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1119 ep->qp.cq_prod_idx = 0; 1120 ep->qp.cq_cons_idx = 0; 1121 ep->qp.cqe_left = hba->max_cqes; 1122 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1123 ep->qp.cqe_size = hba->max_cqes; 1124 1125 /* Invalidate all EQ CQE index, req only for 57710 */ 1126 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1127 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1128 1129 /* Allocate page table memory for RQ which is page aligned */ 1130 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1131 ep->qp.rq_mem_size = 1132 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1133 ep->qp.rq_pgtbl_size = 1134 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1135 ep->qp.rq_pgtbl_size = 1136 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1137 1138 ep->qp.rq_pgtbl_virt = 1139 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1140 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1141 if (!ep->qp.rq_pgtbl_virt) { 1142 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1143 ep->qp.rq_pgtbl_size); 1144 goto mem_alloc_err; 1145 } 1146 1147 /* Allocate memory area for actual RQ element */ 1148 ep->qp.rq_virt = 1149 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1150 &ep->qp.rq_phys, GFP_KERNEL); 1151 if (!ep->qp.rq_virt) { 1152 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1153 ep->qp.rq_mem_size); 1154 goto mem_alloc_err; 1155 } 1156 1157 ep->qp.rq_first_qe = ep->qp.rq_virt; 1158 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1159 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1160 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1161 ep->qp.rq_prod_idx = 0x8000; 1162 ep->qp.rq_cons_idx = 0; 1163 ep->qp.rqe_left = hba->max_rqes; 1164 1165 setup_qp_page_tables(ep); 1166 1167 return 0; 1168 1169mem_alloc_err: 1170 bnx2i_free_qp_resc(hba, ep); 1171 return -ENOMEM; 1172} 1173 1174 1175 1176/** 1177 * bnx2i_free_qp_resc - free memory resources held by QP 1178 * @hba: adapter structure pointer 1179 * @ep: endpoint (transport identifier) structure 1180 * 1181 * Free QP resources - SQ/RQ/CQ memory and page tables. 1182 */ 1183void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1184{ 1185 if (ep->qp.ctx_base) { 1186 iounmap(ep->qp.ctx_base); 1187 ep->qp.ctx_base = NULL; 1188 } 1189 /* Free SQ mem */ 1190 if (ep->qp.sq_pgtbl_virt) { 1191 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1192 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1193 ep->qp.sq_pgtbl_virt = NULL; 1194 ep->qp.sq_pgtbl_phys = 0; 1195 } 1196 if (ep->qp.sq_virt) { 1197 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1198 ep->qp.sq_virt, ep->qp.sq_phys); 1199 ep->qp.sq_virt = NULL; 1200 ep->qp.sq_phys = 0; 1201 } 1202 1203 /* Free RQ mem */ 1204 if (ep->qp.rq_pgtbl_virt) { 1205 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1206 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1207 ep->qp.rq_pgtbl_virt = NULL; 1208 ep->qp.rq_pgtbl_phys = 0; 1209 } 1210 if (ep->qp.rq_virt) { 1211 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1212 ep->qp.rq_virt, ep->qp.rq_phys); 1213 ep->qp.rq_virt = NULL; 1214 ep->qp.rq_phys = 0; 1215 } 1216 1217 /* Free CQ mem */ 1218 if (ep->qp.cq_pgtbl_virt) { 1219 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1220 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1221 ep->qp.cq_pgtbl_virt = NULL; 1222 ep->qp.cq_pgtbl_phys = 0; 1223 } 1224 if (ep->qp.cq_virt) { 1225 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1226 ep->qp.cq_virt, ep->qp.cq_phys); 1227 ep->qp.cq_virt = NULL; 1228 ep->qp.cq_phys = 0; 1229 } 1230} 1231 1232 1233/** 1234 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1235 * @hba: adapter structure pointer 1236 * 1237 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1238 * This results in iSCSi support validation and on-chip context manager 1239 * initialization. Firmware completes this handshake with a CQE carrying 1240 * the result of iscsi support validation. Parameter carried by 1241 * iscsi init request determines the number of offloaded connection and 1242 * tolerance level for iscsi protocol violation this hba/chip can support 1243 */ 1244int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1245{ 1246 struct kwqe *kwqe_arr[3]; 1247 struct iscsi_kwqe_init1 iscsi_init; 1248 struct iscsi_kwqe_init2 iscsi_init2; 1249 int rc = 0; 1250 u64 mask64; 1251 1252 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1)); 1253 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2)); 1254 1255 bnx2i_adjust_qp_size(hba); 1256 1257 iscsi_init.flags = 1258 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1259 if (en_tcp_dack) 1260 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1261 iscsi_init.reserved0 = 0; 1262 iscsi_init.num_cqs = 1; 1263 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1264 iscsi_init.hdr.flags = 1265 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1266 1267 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1268 iscsi_init.dummy_buffer_addr_hi = 1269 (u32) ((u64) hba->dummy_buf_dma >> 32); 1270 1271 hba->num_ccell = hba->max_sqes >> 1; 1272 hba->ctx_ccell_tasks = 1273 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1274 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1275 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1276 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1277 iscsi_init.sq_num_wqes = hba->max_sqes; 1278 iscsi_init.cq_log_wqes_per_page = 1279 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE); 1280 iscsi_init.cq_num_wqes = hba->max_cqes; 1281 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1282 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1283 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1284 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1285 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1286 iscsi_init.rq_num_wqes = hba->max_rqes; 1287 1288 1289 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1290 iscsi_init2.hdr.flags = 1291 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1292 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1293 mask64 = 0x0ULL; 1294 mask64 |= ( 1295 /* CISCO MDS */ 1296 (1UL << 1297 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1298 /* HP MSA1510i */ 1299 (1UL << 1300 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1301 /* EMC */ 1302 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1303 if (error_mask1) { 1304 iscsi_init2.error_bit_map[0] = error_mask1; 1305 mask64 ^= (u32)(mask64); 1306 mask64 |= error_mask1; 1307 } else 1308 iscsi_init2.error_bit_map[0] = (u32) mask64; 1309 1310 if (error_mask2) { 1311 iscsi_init2.error_bit_map[1] = error_mask2; 1312 mask64 &= 0xffffffff; 1313 mask64 |= ((u64)error_mask2 << 32); 1314 } else 1315 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1316 1317 iscsi_error_mask = mask64; 1318 1319 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1320 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1321 1322 if (hba->cnic && hba->cnic->submit_kwqes) 1323 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1324 return rc; 1325} 1326 1327 1328/** 1329 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1330 * @session: iscsi session 1331 * @bnx2i_conn: bnx2i connection 1332 * @cqe: pointer to newly DMA'ed CQE entry for processing 1333 * 1334 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1335 */ 1336int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1337 struct bnx2i_conn *bnx2i_conn, 1338 struct cqe *cqe) 1339{ 1340 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1341 struct bnx2i_hba *hba = bnx2i_conn->hba; 1342 struct bnx2i_cmd_response *resp_cqe; 1343 struct bnx2i_cmd *bnx2i_cmd; 1344 struct iscsi_task *task; 1345 struct iscsi_scsi_rsp *hdr; 1346 u32 datalen = 0; 1347 1348 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1349 spin_lock_bh(&session->back_lock); 1350 task = iscsi_itt_to_task(conn, 1351 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1352 if (!task) 1353 goto fail; 1354 1355 bnx2i_cmd = task->dd_data; 1356 1357 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { 1358 conn->datain_pdus_cnt += 1359 resp_cqe->task_stat.read_stat.num_data_ins; 1360 conn->rxdata_octets += 1361 bnx2i_cmd->req.total_data_transfer_length; 1362 ADD_STATS_64(hba, rx_pdus, 1363 resp_cqe->task_stat.read_stat.num_data_ins); 1364 ADD_STATS_64(hba, rx_bytes, 1365 bnx2i_cmd->req.total_data_transfer_length); 1366 } else { 1367 conn->dataout_pdus_cnt += 1368 resp_cqe->task_stat.write_stat.num_data_outs; 1369 conn->r2t_pdus_cnt += 1370 resp_cqe->task_stat.write_stat.num_r2ts; 1371 conn->txdata_octets += 1372 bnx2i_cmd->req.total_data_transfer_length; 1373 ADD_STATS_64(hba, tx_pdus, 1374 resp_cqe->task_stat.write_stat.num_data_outs); 1375 ADD_STATS_64(hba, tx_bytes, 1376 bnx2i_cmd->req.total_data_transfer_length); 1377 ADD_STATS_64(hba, rx_pdus, 1378 resp_cqe->task_stat.write_stat.num_r2ts); 1379 } 1380 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1381 1382 hdr = (struct iscsi_scsi_rsp *)task->hdr; 1383 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1384 hdr->opcode = resp_cqe->op_code; 1385 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1386 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1387 hdr->response = resp_cqe->response; 1388 hdr->cmd_status = resp_cqe->status; 1389 hdr->flags = resp_cqe->response_flags; 1390 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1391 1392 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1393 goto done; 1394 1395 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1396 datalen = resp_cqe->data_length; 1397 if (datalen < 2) 1398 goto done; 1399 1400 if (datalen > BNX2I_RQ_WQE_SIZE) { 1401 iscsi_conn_printk(KERN_ERR, conn, 1402 "sense data len %d > RQ sz\n", 1403 datalen); 1404 datalen = BNX2I_RQ_WQE_SIZE; 1405 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1406 iscsi_conn_printk(KERN_ERR, conn, 1407 "sense data len %d > conn data\n", 1408 datalen); 1409 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1410 } 1411 1412 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1413 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1414 } 1415 1416done: 1417 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1418 conn->data, datalen); 1419fail: 1420 spin_unlock_bh(&session->back_lock); 1421 return 0; 1422} 1423 1424 1425/** 1426 * bnx2i_process_login_resp - this function handles iscsi login response 1427 * @session: iscsi session pointer 1428 * @bnx2i_conn: iscsi connection pointer 1429 * @cqe: pointer to newly DMA'ed CQE entry for processing 1430 * 1431 * process Login Response CQE & complete it to open-iscsi user daemon 1432 */ 1433static int bnx2i_process_login_resp(struct iscsi_session *session, 1434 struct bnx2i_conn *bnx2i_conn, 1435 struct cqe *cqe) 1436{ 1437 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1438 struct iscsi_task *task; 1439 struct bnx2i_login_response *login; 1440 struct iscsi_login_rsp *resp_hdr; 1441 int pld_len; 1442 int pad_len; 1443 1444 login = (struct bnx2i_login_response *) cqe; 1445 spin_lock(&session->back_lock); 1446 task = iscsi_itt_to_task(conn, 1447 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1448 if (!task) 1449 goto done; 1450 1451 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1452 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1453 resp_hdr->opcode = login->op_code; 1454 resp_hdr->flags = login->response_flags; 1455 resp_hdr->max_version = login->version_max; 1456 resp_hdr->active_version = login->version_active; 1457 resp_hdr->hlength = 0; 1458 1459 hton24(resp_hdr->dlength, login->data_length); 1460 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1461 resp_hdr->tsih = cpu_to_be16(login->tsih); 1462 resp_hdr->itt = task->hdr->itt; 1463 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1464 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1465 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1466 resp_hdr->status_class = login->status_class; 1467 resp_hdr->status_detail = login->status_detail; 1468 pld_len = login->data_length; 1469 bnx2i_conn->gen_pdu.resp_wr_ptr = 1470 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1471 1472 pad_len = 0; 1473 if (pld_len & 0x3) 1474 pad_len = 4 - (pld_len % 4); 1475 1476 if (pad_len) { 1477 int i = 0; 1478 for (i = 0; i < pad_len; i++) { 1479 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1480 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1481 } 1482 } 1483 1484 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1485 bnx2i_conn->gen_pdu.resp_buf, 1486 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1487done: 1488 spin_unlock(&session->back_lock); 1489 return 0; 1490} 1491 1492 1493/** 1494 * bnx2i_process_text_resp - this function handles iscsi text response 1495 * @session: iscsi session pointer 1496 * @bnx2i_conn: iscsi connection pointer 1497 * @cqe: pointer to newly DMA'ed CQE entry for processing 1498 * 1499 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon 1500 */ 1501static int bnx2i_process_text_resp(struct iscsi_session *session, 1502 struct bnx2i_conn *bnx2i_conn, 1503 struct cqe *cqe) 1504{ 1505 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1506 struct iscsi_task *task; 1507 struct bnx2i_text_response *text; 1508 struct iscsi_text_rsp *resp_hdr; 1509 int pld_len; 1510 int pad_len; 1511 1512 text = (struct bnx2i_text_response *) cqe; 1513 spin_lock(&session->back_lock); 1514 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1515 if (!task) 1516 goto done; 1517 1518 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; 1519 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1520 resp_hdr->opcode = text->op_code; 1521 resp_hdr->flags = text->response_flags; 1522 resp_hdr->hlength = 0; 1523 1524 hton24(resp_hdr->dlength, text->data_length); 1525 resp_hdr->itt = task->hdr->itt; 1526 resp_hdr->ttt = cpu_to_be32(text->ttt); 1527 resp_hdr->statsn = task->hdr->exp_statsn; 1528 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); 1529 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); 1530 pld_len = text->data_length; 1531 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + 1532 pld_len; 1533 pad_len = 0; 1534 if (pld_len & 0x3) 1535 pad_len = 4 - (pld_len % 4); 1536 1537 if (pad_len) { 1538 int i = 0; 1539 for (i = 0; i < pad_len; i++) { 1540 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1541 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1542 } 1543 } 1544 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1545 bnx2i_conn->gen_pdu.resp_buf, 1546 bnx2i_conn->gen_pdu.resp_wr_ptr - 1547 bnx2i_conn->gen_pdu.resp_buf); 1548done: 1549 spin_unlock(&session->back_lock); 1550 return 0; 1551} 1552 1553 1554/** 1555 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1556 * @session: iscsi session pointer 1557 * @bnx2i_conn: iscsi connection pointer 1558 * @cqe: pointer to newly DMA'ed CQE entry for processing 1559 * 1560 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1561 */ 1562static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1563 struct bnx2i_conn *bnx2i_conn, 1564 struct cqe *cqe) 1565{ 1566 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1567 struct iscsi_task *task; 1568 struct bnx2i_tmf_response *tmf_cqe; 1569 struct iscsi_tm_rsp *resp_hdr; 1570 1571 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1572 spin_lock(&session->back_lock); 1573 task = iscsi_itt_to_task(conn, 1574 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1575 if (!task) 1576 goto done; 1577 1578 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1579 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1580 resp_hdr->opcode = tmf_cqe->op_code; 1581 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1582 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1583 resp_hdr->itt = task->hdr->itt; 1584 resp_hdr->response = tmf_cqe->response; 1585 1586 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1587done: 1588 spin_unlock(&session->back_lock); 1589 return 0; 1590} 1591 1592/** 1593 * bnx2i_process_logout_resp - this function handles iscsi logout response 1594 * @session: iscsi session pointer 1595 * @bnx2i_conn: iscsi connection pointer 1596 * @cqe: pointer to newly DMA'ed CQE entry for processing 1597 * 1598 * process iSCSI Logout Response CQE & make function call to 1599 * notify the user daemon. 1600 */ 1601static int bnx2i_process_logout_resp(struct iscsi_session *session, 1602 struct bnx2i_conn *bnx2i_conn, 1603 struct cqe *cqe) 1604{ 1605 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1606 struct iscsi_task *task; 1607 struct bnx2i_logout_response *logout; 1608 struct iscsi_logout_rsp *resp_hdr; 1609 1610 logout = (struct bnx2i_logout_response *) cqe; 1611 spin_lock(&session->back_lock); 1612 task = iscsi_itt_to_task(conn, 1613 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1614 if (!task) 1615 goto done; 1616 1617 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1618 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1619 resp_hdr->opcode = logout->op_code; 1620 resp_hdr->flags = logout->response; 1621 resp_hdr->hlength = 0; 1622 1623 resp_hdr->itt = task->hdr->itt; 1624 resp_hdr->statsn = task->hdr->exp_statsn; 1625 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1626 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1627 1628 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1629 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1630 1631 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1632 1633 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1634done: 1635 spin_unlock(&session->back_lock); 1636 return 0; 1637} 1638 1639/** 1640 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1641 * @session: iscsi session pointer 1642 * @bnx2i_conn: iscsi connection pointer 1643 * @cqe: pointer to newly DMA'ed CQE entry for processing 1644 * 1645 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1646 */ 1647static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1648 struct bnx2i_conn *bnx2i_conn, 1649 struct cqe *cqe) 1650{ 1651 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1652 struct bnx2i_nop_in_msg *nop_in; 1653 struct iscsi_task *task; 1654 1655 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1656 spin_lock(&session->back_lock); 1657 task = iscsi_itt_to_task(conn, 1658 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1659 if (task) 1660 __iscsi_put_task(task); 1661 spin_unlock(&session->back_lock); 1662} 1663 1664/** 1665 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1666 * @bnx2i_conn: iscsi connection 1667 * 1668 * Firmware advances RQ producer index for every unsolicited PDU even if 1669 * payload data length is '0'. This function makes corresponding 1670 * adjustments on the driver side to match this f/w behavior 1671 */ 1672static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1673{ 1674 char dummy_rq_data[2]; 1675 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1676 bnx2i_put_rq_buf(bnx2i_conn, 1); 1677} 1678 1679 1680/** 1681 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1682 * @session: iscsi session pointer 1683 * @bnx2i_conn: iscsi connection pointer 1684 * @cqe: pointer to newly DMA'ed CQE entry for processing 1685 * 1686 * process iSCSI target's proactive iSCSI NOPIN request 1687 */ 1688static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1689 struct bnx2i_conn *bnx2i_conn, 1690 struct cqe *cqe) 1691{ 1692 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1693 struct iscsi_task *task; 1694 struct bnx2i_nop_in_msg *nop_in; 1695 struct iscsi_nopin *hdr; 1696 int tgt_async_nop = 0; 1697 1698 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1699 1700 spin_lock(&session->back_lock); 1701 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1702 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1703 hdr->opcode = nop_in->op_code; 1704 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1705 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1706 hdr->ttt = cpu_to_be32(nop_in->ttt); 1707 1708 if (nop_in->itt == (u16) RESERVED_ITT) { 1709 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1710 hdr->itt = RESERVED_ITT; 1711 tgt_async_nop = 1; 1712 goto done; 1713 } 1714 1715 /* this is a response to one of our nop-outs */ 1716 task = iscsi_itt_to_task(conn, 1717 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1718 if (task) { 1719 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1720 hdr->itt = task->hdr->itt; 1721 hdr->ttt = cpu_to_be32(nop_in->ttt); 1722 memcpy(&hdr->lun, nop_in->lun, 8); 1723 } 1724done: 1725 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1726 spin_unlock(&session->back_lock); 1727 1728 return tgt_async_nop; 1729} 1730 1731 1732/** 1733 * bnx2i_process_async_mesg - this function handles iscsi async message 1734 * @session: iscsi session pointer 1735 * @bnx2i_conn: iscsi connection pointer 1736 * @cqe: pointer to newly DMA'ed CQE entry for processing 1737 * 1738 * process iSCSI ASYNC Message 1739 */ 1740static void bnx2i_process_async_mesg(struct iscsi_session *session, 1741 struct bnx2i_conn *bnx2i_conn, 1742 struct cqe *cqe) 1743{ 1744 struct bnx2i_async_msg *async_cqe; 1745 struct iscsi_async *resp_hdr; 1746 u8 async_event; 1747 1748 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1749 1750 async_cqe = (struct bnx2i_async_msg *)cqe; 1751 async_event = async_cqe->async_event; 1752 1753 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1754 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1755 "async: scsi events not supported\n"); 1756 return; 1757 } 1758 1759 spin_lock(&session->back_lock); 1760 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1761 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1762 resp_hdr->opcode = async_cqe->op_code; 1763 resp_hdr->flags = 0x80; 1764 1765 memcpy(&resp_hdr->lun, async_cqe->lun, 8); 1766 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1767 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1768 1769 resp_hdr->async_event = async_cqe->async_event; 1770 resp_hdr->async_vcode = async_cqe->async_vcode; 1771 1772 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1773 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1774 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1775 1776 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1777 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1778 spin_unlock(&session->back_lock); 1779} 1780 1781 1782/** 1783 * bnx2i_process_reject_mesg - process iscsi reject pdu 1784 * @session: iscsi session pointer 1785 * @bnx2i_conn: iscsi connection pointer 1786 * @cqe: pointer to newly DMA'ed CQE entry for processing 1787 * 1788 * process iSCSI REJECT message 1789 */ 1790static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1791 struct bnx2i_conn *bnx2i_conn, 1792 struct cqe *cqe) 1793{ 1794 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1795 struct bnx2i_reject_msg *reject; 1796 struct iscsi_reject *hdr; 1797 1798 reject = (struct bnx2i_reject_msg *) cqe; 1799 if (reject->data_length) { 1800 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1801 bnx2i_put_rq_buf(bnx2i_conn, 1); 1802 } else 1803 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1804 1805 spin_lock(&session->back_lock); 1806 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1807 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1808 hdr->opcode = reject->op_code; 1809 hdr->reason = reject->reason; 1810 hton24(hdr->dlength, reject->data_length); 1811 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1812 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1813 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1814 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1815 reject->data_length); 1816 spin_unlock(&session->back_lock); 1817} 1818 1819/** 1820 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1821 * @session: iscsi session pointer 1822 * @bnx2i_conn: iscsi connection pointer 1823 * @cqe: pointer to newly DMA'ed CQE entry for processing 1824 * 1825 * process command cleanup response CQE during conn shutdown or error recovery 1826 */ 1827static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1828 struct bnx2i_conn *bnx2i_conn, 1829 struct cqe *cqe) 1830{ 1831 struct bnx2i_cleanup_response *cmd_clean_rsp; 1832 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1833 struct iscsi_task *task; 1834 1835 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1836 spin_lock(&session->back_lock); 1837 task = iscsi_itt_to_task(conn, 1838 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1839 if (!task) 1840 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1841 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1842 spin_unlock(&session->back_lock); 1843 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1844} 1845 1846 1847/** 1848 * bnx2i_percpu_io_thread - thread per cpu for ios 1849 * 1850 * @arg: ptr to bnx2i_percpu_info structure 1851 */ 1852int bnx2i_percpu_io_thread(void *arg) 1853{ 1854 struct bnx2i_percpu_s *p = arg; 1855 struct bnx2i_work *work, *tmp; 1856 LIST_HEAD(work_list); 1857 1858 set_user_nice(current, MIN_NICE); 1859 1860 while (!kthread_should_stop()) { 1861 spin_lock_bh(&p->p_work_lock); 1862 while (!list_empty(&p->work_list)) { 1863 list_splice_init(&p->work_list, &work_list); 1864 spin_unlock_bh(&p->p_work_lock); 1865 1866 list_for_each_entry_safe(work, tmp, &work_list, list) { 1867 list_del_init(&work->list); 1868 /* work allocated in the bh, freed here */ 1869 bnx2i_process_scsi_cmd_resp(work->session, 1870 work->bnx2i_conn, 1871 &work->cqe); 1872 atomic_dec(&work->bnx2i_conn->work_cnt); 1873 kfree(work); 1874 } 1875 spin_lock_bh(&p->p_work_lock); 1876 } 1877 set_current_state(TASK_INTERRUPTIBLE); 1878 spin_unlock_bh(&p->p_work_lock); 1879 schedule(); 1880 } 1881 __set_current_state(TASK_RUNNING); 1882 1883 return 0; 1884} 1885 1886 1887/** 1888 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread 1889 * @session: iscsi session 1890 * @bnx2i_conn: bnx2i connection 1891 * @cqe: pointer to newly DMA'ed CQE entry for processing 1892 * 1893 * this function is called by generic KCQ handler to queue all pending cmd 1894 * completion CQEs 1895 * 1896 * The implementation is to queue the cmd response based on the 1897 * last recorded command for the given connection. The 1898 * cpu_id gets recorded upon task_xmit. No out-of-order completion! 1899 */ 1900static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, 1901 struct bnx2i_conn *bnx2i_conn, 1902 struct bnx2i_nop_in_msg *cqe) 1903{ 1904 struct bnx2i_work *bnx2i_work = NULL; 1905 struct bnx2i_percpu_s *p = NULL; 1906 struct iscsi_task *task; 1907 struct scsi_cmnd *sc; 1908 int rc = 0; 1909 1910 spin_lock(&session->back_lock); 1911 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, 1912 cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1913 if (!task || !task->sc) { 1914 spin_unlock(&session->back_lock); 1915 return -EINVAL; 1916 } 1917 sc = task->sc; 1918 1919 spin_unlock(&session->back_lock); 1920 1921 p = &per_cpu(bnx2i_percpu, blk_mq_rq_cpu(scsi_cmd_to_rq(sc))); 1922 spin_lock(&p->p_work_lock); 1923 if (unlikely(!p->iothread)) { 1924 rc = -EINVAL; 1925 goto err; 1926 } 1927 /* Alloc and copy to the cqe */ 1928 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC); 1929 if (bnx2i_work) { 1930 INIT_LIST_HEAD(&bnx2i_work->list); 1931 bnx2i_work->session = session; 1932 bnx2i_work->bnx2i_conn = bnx2i_conn; 1933 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe)); 1934 list_add_tail(&bnx2i_work->list, &p->work_list); 1935 atomic_inc(&bnx2i_conn->work_cnt); 1936 wake_up_process(p->iothread); 1937 spin_unlock(&p->p_work_lock); 1938 goto done; 1939 } else 1940 rc = -ENOMEM; 1941err: 1942 spin_unlock(&p->p_work_lock); 1943 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe); 1944done: 1945 return rc; 1946} 1947 1948 1949/** 1950 * bnx2i_process_new_cqes - process newly DMA'ed CQE's 1951 * @bnx2i_conn: bnx2i connection 1952 * 1953 * this function is called by generic KCQ handler to process all pending CQE's 1954 */ 1955static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) 1956{ 1957 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1958 struct iscsi_session *session = conn->session; 1959 struct bnx2i_hba *hba = bnx2i_conn->hba; 1960 struct qp_info *qp; 1961 struct bnx2i_nop_in_msg *nopin; 1962 int tgt_async_msg; 1963 int cqe_cnt = 0; 1964 1965 if (bnx2i_conn->ep == NULL) 1966 return 0; 1967 1968 qp = &bnx2i_conn->ep->qp; 1969 1970 if (!qp->cq_virt) { 1971 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", 1972 hba->netdev->name); 1973 goto out; 1974 } 1975 while (1) { 1976 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1977 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1978 break; 1979 1980 if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) { 1981 if (nopin->op_code == ISCSI_OP_NOOP_IN && 1982 nopin->itt == (u16) RESERVED_ITT) { 1983 printk(KERN_ALERT "bnx2i: Unsolicited " 1984 "NOP-In detected for suspended " 1985 "connection dev=%s!\n", 1986 hba->netdev->name); 1987 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1988 goto cqe_out; 1989 } 1990 break; 1991 } 1992 tgt_async_msg = 0; 1993 1994 switch (nopin->op_code) { 1995 case ISCSI_OP_SCSI_CMD_RSP: 1996 case ISCSI_OP_SCSI_DATA_IN: 1997 /* Run the kthread engine only for data cmds 1998 All other cmds will be completed in this bh! */ 1999 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); 2000 goto done; 2001 case ISCSI_OP_LOGIN_RSP: 2002 bnx2i_process_login_resp(session, bnx2i_conn, 2003 qp->cq_cons_qe); 2004 break; 2005 case ISCSI_OP_SCSI_TMFUNC_RSP: 2006 bnx2i_process_tmf_resp(session, bnx2i_conn, 2007 qp->cq_cons_qe); 2008 break; 2009 case ISCSI_OP_TEXT_RSP: 2010 bnx2i_process_text_resp(session, bnx2i_conn, 2011 qp->cq_cons_qe); 2012 break; 2013 case ISCSI_OP_LOGOUT_RSP: 2014 bnx2i_process_logout_resp(session, bnx2i_conn, 2015 qp->cq_cons_qe); 2016 break; 2017 case ISCSI_OP_NOOP_IN: 2018 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 2019 qp->cq_cons_qe)) 2020 tgt_async_msg = 1; 2021 break; 2022 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 2023 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 2024 qp->cq_cons_qe); 2025 break; 2026 case ISCSI_OP_ASYNC_EVENT: 2027 bnx2i_process_async_mesg(session, bnx2i_conn, 2028 qp->cq_cons_qe); 2029 tgt_async_msg = 1; 2030 break; 2031 case ISCSI_OP_REJECT: 2032 bnx2i_process_reject_mesg(session, bnx2i_conn, 2033 qp->cq_cons_qe); 2034 break; 2035 case ISCSI_OPCODE_CLEANUP_RESPONSE: 2036 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 2037 qp->cq_cons_qe); 2038 break; 2039 default: 2040 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2041 nopin->op_code); 2042 } 2043 2044 ADD_STATS_64(hba, rx_pdus, 1); 2045 ADD_STATS_64(hba, rx_bytes, nopin->data_length); 2046done: 2047 if (!tgt_async_msg) { 2048 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) 2049 printk(KERN_ALERT "bnx2i (%s): no active cmd! " 2050 "op 0x%x\n", 2051 hba->netdev->name, 2052 nopin->op_code); 2053 else 2054 atomic_dec(&bnx2i_conn->ep->num_active_cmds); 2055 } 2056cqe_out: 2057 /* clear out in production version only, till beta keep opcode 2058 * field intact, will be helpful in debugging (context dump) 2059 * nopin->op_code = 0; 2060 */ 2061 cqe_cnt++; 2062 qp->cqe_exp_seq_sn++; 2063 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 2064 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 2065 2066 if (qp->cq_cons_qe == qp->cq_last_qe) { 2067 qp->cq_cons_qe = qp->cq_first_qe; 2068 qp->cq_cons_idx = 0; 2069 } else { 2070 qp->cq_cons_qe++; 2071 qp->cq_cons_idx++; 2072 } 2073 } 2074out: 2075 return cqe_cnt; 2076} 2077 2078/** 2079 * bnx2i_fastpath_notification - process global event queue (KCQ) 2080 * @hba: adapter structure pointer 2081 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 2082 * 2083 * Fast path event notification handler, KCQ entry carries context id 2084 * of the connection that has 1 or more pending CQ entries 2085 */ 2086static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 2087 struct iscsi_kcqe *new_cqe_kcqe) 2088{ 2089 struct bnx2i_conn *bnx2i_conn; 2090 u32 iscsi_cid; 2091 int nxt_idx; 2092 2093 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 2094 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2095 2096 if (!bnx2i_conn) { 2097 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 2098 return; 2099 } 2100 if (!bnx2i_conn->ep) { 2101 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 2102 return; 2103 } 2104 2105 bnx2i_process_new_cqes(bnx2i_conn); 2106 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, 2107 CNIC_ARM_CQE_FP); 2108 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) 2109 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); 2110} 2111 2112 2113/** 2114 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 2115 * @hba: adapter structure pointer 2116 * @update_kcqe: kcqe pointer 2117 * 2118 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 2119 */ 2120static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 2121 struct iscsi_kcqe *update_kcqe) 2122{ 2123 struct bnx2i_conn *conn; 2124 u32 iscsi_cid; 2125 2126 iscsi_cid = update_kcqe->iscsi_conn_id; 2127 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2128 2129 if (!conn) { 2130 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 2131 return; 2132 } 2133 if (!conn->ep) { 2134 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 2135 return; 2136 } 2137 2138 if (update_kcqe->completion_status) { 2139 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 2140 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 2141 } else 2142 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 2143 2144 wake_up_interruptible(&conn->ep->ofld_wait); 2145} 2146 2147 2148/** 2149 * bnx2i_recovery_que_add_conn - add connection to recovery queue 2150 * @hba: adapter structure pointer 2151 * @bnx2i_conn: iscsi connection 2152 * 2153 * Add connection to recovery queue and schedule adapter eh worker 2154 */ 2155static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 2156 struct bnx2i_conn *bnx2i_conn) 2157{ 2158 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 2159 ISCSI_ERR_CONN_FAILED); 2160} 2161 2162 2163/** 2164 * bnx2i_process_tcp_error - process error notification on a given connection 2165 * 2166 * @hba: adapter structure pointer 2167 * @tcp_err: tcp error kcqe pointer 2168 * 2169 * handles tcp level error notifications from FW. 2170 */ 2171static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 2172 struct iscsi_kcqe *tcp_err) 2173{ 2174 struct bnx2i_conn *bnx2i_conn; 2175 u32 iscsi_cid; 2176 2177 iscsi_cid = tcp_err->iscsi_conn_id; 2178 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2179 2180 if (!bnx2i_conn) { 2181 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2182 return; 2183 } 2184 2185 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 2186 iscsi_cid, tcp_err->completion_status); 2187 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2188} 2189 2190 2191/** 2192 * bnx2i_process_iscsi_error - process error notification on a given connection 2193 * @hba: adapter structure pointer 2194 * @iscsi_err: iscsi error kcqe pointer 2195 * 2196 * handles iscsi error notifications from the FW. Firmware based in initial 2197 * handshake classifies iscsi protocol / TCP rfc violation into either 2198 * warning or error indications. If indication is of "Error" type, driver 2199 * will initiate session recovery for that connection/session. For 2200 * "Warning" type indication, driver will put out a system log message 2201 * (there will be only one message for each type for the life of the 2202 * session, this is to avoid un-necessarily overloading the system) 2203 */ 2204static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 2205 struct iscsi_kcqe *iscsi_err) 2206{ 2207 struct bnx2i_conn *bnx2i_conn; 2208 u32 iscsi_cid; 2209 const char *additional_notice = ""; 2210 const char *message; 2211 int need_recovery; 2212 u64 err_mask64; 2213 2214 iscsi_cid = iscsi_err->iscsi_conn_id; 2215 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2216 if (!bnx2i_conn) { 2217 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2218 return; 2219 } 2220 2221 err_mask64 = (0x1ULL << iscsi_err->completion_status); 2222 2223 if (err_mask64 & iscsi_error_mask) { 2224 need_recovery = 0; 2225 message = "iscsi_warning"; 2226 } else { 2227 need_recovery = 1; 2228 message = "iscsi_error"; 2229 } 2230 2231 switch (iscsi_err->completion_status) { 2232 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 2233 additional_notice = "hdr digest err"; 2234 break; 2235 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 2236 additional_notice = "data digest err"; 2237 break; 2238 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 2239 additional_notice = "wrong opcode rcvd"; 2240 break; 2241 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 2242 additional_notice = "AHS len > 0 rcvd"; 2243 break; 2244 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 2245 additional_notice = "invalid ITT rcvd"; 2246 break; 2247 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 2248 additional_notice = "wrong StatSN rcvd"; 2249 break; 2250 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 2251 additional_notice = "wrong DataSN rcvd"; 2252 break; 2253 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 2254 additional_notice = "pend R2T violation"; 2255 break; 2256 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 2257 additional_notice = "ERL0, UO"; 2258 break; 2259 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2260 additional_notice = "ERL0, U1"; 2261 break; 2262 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2263 additional_notice = "ERL0, U2"; 2264 break; 2265 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2266 additional_notice = "ERL0, U3"; 2267 break; 2268 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2269 additional_notice = "ERL0, U4"; 2270 break; 2271 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2272 additional_notice = "ERL0, U5"; 2273 break; 2274 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2275 additional_notice = "ERL0, U6"; 2276 break; 2277 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2278 additional_notice = "invalid resi len"; 2279 break; 2280 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2281 additional_notice = "MRDSL violation"; 2282 break; 2283 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2284 additional_notice = "F-bit not set"; 2285 break; 2286 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2287 additional_notice = "invalid TTT"; 2288 break; 2289 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2290 additional_notice = "invalid DataSN"; 2291 break; 2292 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2293 additional_notice = "burst len violation"; 2294 break; 2295 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2296 additional_notice = "buf offset violation"; 2297 break; 2298 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2299 additional_notice = "invalid LUN field"; 2300 break; 2301 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2302 additional_notice = "invalid R2TSN field"; 2303 break; 2304#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2305 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2306 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2307 additional_notice = "invalid cmd len1"; 2308 break; 2309#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2310 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2311 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2312 additional_notice = "invalid cmd len2"; 2313 break; 2314 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2315 additional_notice = "pend r2t exceeds MaxOutstandingR2T value"; 2316 break; 2317 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2318 additional_notice = "TTT is rsvd"; 2319 break; 2320 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2321 additional_notice = "MBL violation"; 2322 break; 2323#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2324 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2325 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2326 additional_notice = "data seg len != 0"; 2327 break; 2328 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2329 additional_notice = "reject pdu len error"; 2330 break; 2331 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2332 additional_notice = "async pdu len error"; 2333 break; 2334 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2335 additional_notice = "nopin pdu len error"; 2336 break; 2337#define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2338 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2339 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2340 additional_notice = "pend r2t in cleanup"; 2341 break; 2342 2343 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2344 additional_notice = "IP fragments rcvd"; 2345 break; 2346 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2347 additional_notice = "IP options error"; 2348 break; 2349 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2350 additional_notice = "urgent flag error"; 2351 break; 2352 default: 2353 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2354 iscsi_err->completion_status); 2355 } 2356 2357 if (need_recovery) { 2358 iscsi_conn_printk(KERN_ALERT, 2359 bnx2i_conn->cls_conn->dd_data, 2360 "bnx2i: %s - %s\n", 2361 message, additional_notice); 2362 2363 iscsi_conn_printk(KERN_ALERT, 2364 bnx2i_conn->cls_conn->dd_data, 2365 "conn_err - hostno %d conn %p, " 2366 "iscsi_cid %x cid %x\n", 2367 bnx2i_conn->hba->shost->host_no, 2368 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2369 bnx2i_conn->ep->ep_cid); 2370 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2371 } else 2372 if (!test_and_set_bit(iscsi_err->completion_status, 2373 (void *) &bnx2i_conn->violation_notified)) 2374 iscsi_conn_printk(KERN_ALERT, 2375 bnx2i_conn->cls_conn->dd_data, 2376 "bnx2i: %s - %s\n", 2377 message, additional_notice); 2378} 2379 2380 2381/** 2382 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2383 * @hba: adapter structure pointer 2384 * @conn_destroy: conn destroy kcqe pointer 2385 * 2386 * handles connection destroy completion request. 2387 */ 2388static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2389 struct iscsi_kcqe *conn_destroy) 2390{ 2391 struct bnx2i_endpoint *ep; 2392 2393 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2394 if (!ep) { 2395 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2396 "offload request, unexpected completion\n"); 2397 return; 2398 } 2399 2400 if (hba != ep->hba) { 2401 printk(KERN_ALERT "conn destroy- error hba mismatch\n"); 2402 return; 2403 } 2404 2405 if (conn_destroy->completion_status) { 2406 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2407 ep->state = EP_STATE_CLEANUP_FAILED; 2408 } else 2409 ep->state = EP_STATE_CLEANUP_CMPL; 2410 wake_up_interruptible(&ep->ofld_wait); 2411} 2412 2413 2414/** 2415 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2416 * @hba: adapter structure pointer 2417 * @ofld_kcqe: conn offload kcqe pointer 2418 * 2419 * handles initial connection offload completion, ep_connect() thread is 2420 * woken-up to continue with LLP connect process 2421 */ 2422static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2423 struct iscsi_kcqe *ofld_kcqe) 2424{ 2425 u32 cid_addr; 2426 struct bnx2i_endpoint *ep; 2427 2428 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2429 if (!ep) { 2430 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2431 return; 2432 } 2433 2434 if (hba != ep->hba) { 2435 printk(KERN_ALERT "ofld_cmpl: error hba mismatch\n"); 2436 return; 2437 } 2438 2439 if (ofld_kcqe->completion_status) { 2440 ep->state = EP_STATE_OFLD_FAILED; 2441 if (ofld_kcqe->completion_status == 2442 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2443 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2444 "to allocate iSCSI context resources\n", 2445 hba->netdev->name); 2446 else if (ofld_kcqe->completion_status == 2447 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2448 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2449 "opcode\n", hba->netdev->name); 2450 else if (ofld_kcqe->completion_status == 2451 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2452 /* error status code valid only for 5771x chipset */ 2453 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2454 else 2455 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2456 "error code %d\n", hba->netdev->name, 2457 ofld_kcqe->completion_status); 2458 } else { 2459 ep->state = EP_STATE_OFLD_COMPL; 2460 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2461 ep->ep_cid = cid_addr; 2462 ep->qp.ctx_base = NULL; 2463 } 2464 wake_up_interruptible(&ep->ofld_wait); 2465} 2466 2467/** 2468 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE 2469 * @context: adapter structure pointer 2470 * @kcqe: kcqe pointer 2471 * @num_cqe: number of kcqes to process 2472 * 2473 * Generic KCQ event handler/dispatcher 2474 */ 2475static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2476 u32 num_cqe) 2477{ 2478 struct bnx2i_hba *hba = context; 2479 int i = 0; 2480 struct iscsi_kcqe *ikcqe = NULL; 2481 2482 while (i < num_cqe) { 2483 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2484 2485 if (ikcqe->op_code == 2486 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2487 bnx2i_fastpath_notification(hba, ikcqe); 2488 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2489 bnx2i_process_ofld_cmpl(hba, ikcqe); 2490 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2491 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2492 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2493 if (ikcqe->completion_status != 2494 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2495 bnx2i_iscsi_license_error(hba, ikcqe->\ 2496 completion_status); 2497 else { 2498 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2499 bnx2i_get_link_state(hba); 2500 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2501 "ISCSI_INIT passed\n", 2502 (u8)hba->pcidev->bus->number, 2503 hba->pci_devno, 2504 (u8)hba->pci_func); 2505 2506 2507 } 2508 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2509 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2510 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2511 bnx2i_process_iscsi_error(hba, ikcqe); 2512 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2513 bnx2i_process_tcp_error(hba, ikcqe); 2514 else 2515 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2516 ikcqe->op_code); 2517 } 2518} 2519 2520 2521/** 2522 * bnx2i_indicate_netevent - Generic netdev event handler 2523 * @context: adapter structure pointer 2524 * @event: event type 2525 * @vlan_id: vlans id - associated vlan id with this event 2526 * 2527 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2528 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2529 */ 2530static void bnx2i_indicate_netevent(void *context, unsigned long event, 2531 u16 vlan_id) 2532{ 2533 struct bnx2i_hba *hba = context; 2534 2535 /* Ignore all netevent coming from vlans */ 2536 if (vlan_id != 0) 2537 return; 2538 2539 switch (event) { 2540 case NETDEV_UP: 2541 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2542 bnx2i_send_fw_iscsi_init_msg(hba); 2543 break; 2544 case NETDEV_DOWN: 2545 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2546 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2547 break; 2548 case NETDEV_GOING_DOWN: 2549 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2550 iscsi_host_for_each_session(hba->shost, 2551 bnx2i_drop_session); 2552 break; 2553 case NETDEV_CHANGE: 2554 bnx2i_get_link_state(hba); 2555 break; 2556 default: 2557 ; 2558 } 2559} 2560 2561 2562/** 2563 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2564 * @cm_sk: cnic sock structure pointer 2565 * 2566 * function callback exported via bnx2i - cnic driver interface to 2567 * indicate completion of option-2 TCP connect request. 2568 */ 2569static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2570{ 2571 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2572 2573 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2574 ep->state = EP_STATE_CONNECT_FAILED; 2575 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2576 ep->state = EP_STATE_CONNECT_COMPL; 2577 else 2578 ep->state = EP_STATE_CONNECT_FAILED; 2579 2580 wake_up_interruptible(&ep->ofld_wait); 2581} 2582 2583 2584/** 2585 * bnx2i_cm_close_cmpl - process tcp conn close completion 2586 * @cm_sk: cnic sock structure pointer 2587 * 2588 * function callback exported via bnx2i - cnic driver interface to 2589 * indicate completion of option-2 graceful TCP connect shutdown 2590 */ 2591static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2592{ 2593 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2594 2595 ep->state = EP_STATE_DISCONN_COMPL; 2596 wake_up_interruptible(&ep->ofld_wait); 2597} 2598 2599 2600/** 2601 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2602 * @cm_sk: cnic sock structure pointer 2603 * 2604 * function callback exported via bnx2i - cnic driver interface to 2605 * indicate completion of option-2 abortive TCP connect termination 2606 */ 2607static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2608{ 2609 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2610 2611 ep->state = EP_STATE_DISCONN_COMPL; 2612 wake_up_interruptible(&ep->ofld_wait); 2613} 2614 2615 2616/** 2617 * bnx2i_cm_remote_close - process received TCP FIN 2618 * @cm_sk: cnic sock structure pointer 2619 * 2620 * function callback exported via bnx2i - cnic driver interface to indicate 2621 * async TCP events such as FIN 2622 */ 2623static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2624{ 2625 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2626 2627 ep->state = EP_STATE_TCP_FIN_RCVD; 2628 if (ep->conn) 2629 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2630} 2631 2632/** 2633 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2634 * @cm_sk: cnic sock structure pointer 2635 * 2636 * function callback exported via bnx2i - cnic driver interface to 2637 * indicate async TCP events (RST) sent by the peer. 2638 */ 2639static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2640{ 2641 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2642 u32 old_state = ep->state; 2643 2644 ep->state = EP_STATE_TCP_RST_RCVD; 2645 if (old_state == EP_STATE_DISCONN_START) 2646 wake_up_interruptible(&ep->ofld_wait); 2647 else 2648 if (ep->conn) 2649 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2650} 2651 2652 2653static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2654 char *buf, u16 buflen) 2655{ 2656 struct bnx2i_hba *hba = context; 2657 int rc; 2658 2659 if (!hba) 2660 return -ENODEV; 2661 2662 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2663 msg_type, buf, buflen); 2664 if (rc) 2665 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2666 2667 return rc; 2668} 2669 2670 2671/* 2672 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2673 * carrying callback function pointers 2674 */ 2675struct cnic_ulp_ops bnx2i_cnic_cb = { 2676 .cnic_init = bnx2i_ulp_init, 2677 .cnic_exit = bnx2i_ulp_exit, 2678 .cnic_start = bnx2i_start, 2679 .cnic_stop = bnx2i_stop, 2680 .indicate_kcqes = bnx2i_indicate_kcqe, 2681 .indicate_netevent = bnx2i_indicate_netevent, 2682 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2683 .cm_close_complete = bnx2i_cm_close_cmpl, 2684 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2685 .cm_remote_close = bnx2i_cm_remote_close, 2686 .cm_remote_abort = bnx2i_cm_remote_abort, 2687 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2688 .cnic_get_stats = bnx2i_get_stats, 2689 .owner = THIS_MODULE 2690}; 2691 2692 2693/** 2694 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2695 * @ep: bnx2i endpoint 2696 * 2697 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2698 * register in BAR #0. Whereas in 57710 these register are accessed by 2699 * mapping BAR #1 2700 */ 2701int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2702{ 2703 u32 cid_num; 2704 u32 reg_off; 2705 u32 first_l4l5; 2706 u32 ctx_sz; 2707 u32 config2; 2708 resource_size_t reg_base; 2709 2710 cid_num = bnx2i_get_cid_num(ep); 2711 2712 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2713 reg_base = pci_resource_start(ep->hba->pcidev, 2714 BNX2X_DOORBELL_PCI_BAR); 2715 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF); 2716 ep->qp.ctx_base = ioremap(reg_base + reg_off, 4); 2717 if (!ep->qp.ctx_base) 2718 return -ENOMEM; 2719 goto arm_cq; 2720 } 2721 2722 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && 2723 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { 2724 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); 2725 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; 2726 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; 2727 if (ctx_sz) 2728 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE 2729 + BNX2I_570X_PAGE_SIZE_DEFAULT * 2730 (((cid_num - first_l4l5) / ctx_sz) + 256); 2731 else 2732 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2733 } else 2734 /* 5709 device in normal node and 5706/5708 devices */ 2735 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2736 2737 ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off, 2738 MB_KERNEL_CTX_SIZE); 2739 if (!ep->qp.ctx_base) 2740 return -ENOMEM; 2741 2742arm_cq: 2743 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); 2744 return 0; 2745} 2746