bnx2i_hwi.c revision 0d83ab65ff1b54ce8b6cd172285cf71a38c4cceb
1/* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2011 Broadcom Corporation 4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. 5 * Copyright (c) 2007, 2008 Mike Christie 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation. 10 * 11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) 12 * Maintained by: Eddie Wai (eddie.wai@broadcom.com) 13 */ 14 15#include <linux/gfp.h> 16#include <scsi/scsi_tcq.h> 17#include <scsi/libiscsi.h> 18#include "bnx2i.h" 19 20DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); 21 22/** 23 * bnx2i_get_cid_num - get cid from ep 24 * @ep: endpoint pointer 25 * 26 * Only applicable to 57710 family of devices 27 */ 28static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep) 29{ 30 u32 cid; 31 32 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 33 cid = ep->ep_cid; 34 else 35 cid = GET_CID_NUM(ep->ep_cid); 36 return cid; 37} 38 39 40/** 41 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type 42 * @hba: Adapter for which adjustments is to be made 43 * 44 * Only applicable to 57710 family of devices 45 */ 46static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba) 47{ 48 u32 num_elements_per_pg; 49 50 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) || 51 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) || 52 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 53 if (!is_power_of_2(hba->max_sqes)) 54 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes); 55 56 if (!is_power_of_2(hba->max_rqes)) 57 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes); 58 } 59 60 /* Adjust each queue size if the user selection does not 61 * yield integral num of page buffers 62 */ 63 /* adjust SQ */ 64 num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 65 if (hba->max_sqes < num_elements_per_pg) 66 hba->max_sqes = num_elements_per_pg; 67 else if (hba->max_sqes % num_elements_per_pg) 68 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) & 69 ~(num_elements_per_pg - 1); 70 71 /* adjust CQ */ 72 num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE; 73 if (hba->max_cqes < num_elements_per_pg) 74 hba->max_cqes = num_elements_per_pg; 75 else if (hba->max_cqes % num_elements_per_pg) 76 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) & 77 ~(num_elements_per_pg - 1); 78 79 /* adjust RQ */ 80 num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE; 81 if (hba->max_rqes < num_elements_per_pg) 82 hba->max_rqes = num_elements_per_pg; 83 else if (hba->max_rqes % num_elements_per_pg) 84 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) & 85 ~(num_elements_per_pg - 1); 86} 87 88 89/** 90 * bnx2i_get_link_state - get network interface link state 91 * @hba: adapter instance pointer 92 * 93 * updates adapter structure flag based on netdev state 94 */ 95static void bnx2i_get_link_state(struct bnx2i_hba *hba) 96{ 97 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state)) 98 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 99 else 100 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 101} 102 103 104/** 105 * bnx2i_iscsi_license_error - displays iscsi license related error message 106 * @hba: adapter instance pointer 107 * @error_code: error classification 108 * 109 * Puts out an error log when driver is unable to offload iscsi connection 110 * due to license restrictions 111 */ 112static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code) 113{ 114 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED) 115 /* iSCSI offload not supported on this device */ 116 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n", 117 hba->netdev->name); 118 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED) 119 /* iSCSI offload not supported on this LOM device */ 120 printk(KERN_ERR "bnx2i: LOM is not enable to " 121 "offload iSCSI connections, dev=%s\n", 122 hba->netdev->name); 123 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state); 124} 125 126 127/** 128 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification 129 * @ep: endpoint (transport indentifier) structure 130 * @action: action, ARM or DISARM. For now only ARM_CQE is used 131 * 132 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt 133 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is 134 * outstanding and on chip timer expires 135 */ 136int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action) 137{ 138 struct bnx2i_5771x_cq_db *cq_db; 139 u16 cq_index; 140 u16 next_index = 0; 141 u32 num_active_cmds; 142 143 /* Coalesce CQ entries only on 10G devices */ 144 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 145 return 0; 146 147 /* Do not update CQ DB multiple times before firmware writes 148 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious 149 * interrupts and other unwanted results 150 */ 151 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 152 153 if (action != CNIC_ARM_CQE_FP) 154 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF) 155 return 0; 156 157 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) { 158 num_active_cmds = atomic_read(&ep->num_active_cmds); 159 if (num_active_cmds <= event_coal_min) 160 next_index = 1; 161 else { 162 next_index = num_active_cmds >> ep->ec_shift; 163 if (next_index > num_active_cmds - event_coal_min) 164 next_index = num_active_cmds - event_coal_min; 165 } 166 if (!next_index) 167 next_index = 1; 168 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1; 169 if (cq_index > ep->qp.cqe_size * 2) 170 cq_index -= ep->qp.cqe_size * 2; 171 if (!cq_index) 172 cq_index = 1; 173 174 cq_db->sqn[0] = cq_index; 175 } 176 return next_index; 177} 178 179 180/** 181 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer 182 * @conn: iscsi connection on which RQ event occurred 183 * @ptr: driver buffer to which RQ buffer contents is to 184 * be copied 185 * @len: length of valid data inside RQ buf 186 * 187 * Copies RQ buffer contents from shared (DMA'able) memory region to 188 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and 189 * scsi sense info 190 */ 191void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len) 192{ 193 if (!bnx2i_conn->ep->qp.rqe_left) 194 return; 195 196 bnx2i_conn->ep->qp.rqe_left--; 197 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len); 198 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) { 199 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe; 200 bnx2i_conn->ep->qp.rq_cons_idx = 0; 201 } else { 202 bnx2i_conn->ep->qp.rq_cons_qe++; 203 bnx2i_conn->ep->qp.rq_cons_idx++; 204 } 205} 206 207 208static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) 209{ 210 struct bnx2i_5771x_dbell dbell; 211 u32 msg; 212 213 memset(&dbell, 0, sizeof(dbell)); 214 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << 215 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); 216 msg = *((u32 *)&dbell); 217 /* TODO : get doorbell register mapping */ 218 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); 219} 220 221 222/** 223 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell 224 * @conn: iscsi connection on which event to post 225 * @count: number of RQ buffer being posted to chip 226 * 227 * No need to ring hardware doorbell for 57710 family of devices 228 */ 229void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count) 230{ 231 struct bnx2i_5771x_sq_rq_db *rq_db; 232 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000); 233 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 234 235 ep->qp.rqe_left += count; 236 ep->qp.rq_prod_idx &= 0x7FFF; 237 ep->qp.rq_prod_idx += count; 238 239 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) { 240 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes; 241 if (!hi_bit) 242 ep->qp.rq_prod_idx |= 0x8000; 243 } else 244 ep->qp.rq_prod_idx |= hi_bit; 245 246 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 247 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt; 248 rq_db->prod_idx = ep->qp.rq_prod_idx; 249 /* no need to ring hardware doorbell for 57710 */ 250 } else { 251 writew(ep->qp.rq_prod_idx, 252 ep->qp.ctx_base + CNIC_RECV_DOORBELL); 253 } 254 mmiowb(); 255} 256 257 258/** 259 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine 260 * @conn: iscsi connection to which new SQ entries belong 261 * @count: number of SQ WQEs to post 262 * 263 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family 264 * of devices. For 5706/5708/5709 new SQ WQE count is written into the 265 * doorbell register 266 */ 267static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) 268{ 269 struct bnx2i_5771x_sq_rq_db *sq_db; 270 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 271 272 atomic_inc(&ep->num_active_cmds); 273 wmb(); /* flush SQ WQE memory before the doorbell is rung */ 274 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 275 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; 276 sq_db->prod_idx = ep->qp.sq_prod_idx; 277 bnx2i_ring_577xx_doorbell(bnx2i_conn); 278 } else 279 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); 280 281 mmiowb(); /* flush posted PCI writes */ 282} 283 284 285/** 286 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters 287 * @conn: iscsi connection to which new SQ entries belong 288 * @count: number of SQ WQEs to post 289 * 290 * this routine will update SQ driver parameters and ring the doorbell 291 */ 292static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, 293 int count) 294{ 295 int tmp_cnt; 296 297 if (count == 1) { 298 if (bnx2i_conn->ep->qp.sq_prod_qe == 299 bnx2i_conn->ep->qp.sq_last_qe) 300 bnx2i_conn->ep->qp.sq_prod_qe = 301 bnx2i_conn->ep->qp.sq_first_qe; 302 else 303 bnx2i_conn->ep->qp.sq_prod_qe++; 304 } else { 305 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= 306 bnx2i_conn->ep->qp.sq_last_qe) 307 bnx2i_conn->ep->qp.sq_prod_qe += count; 308 else { 309 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - 310 bnx2i_conn->ep->qp.sq_prod_qe; 311 bnx2i_conn->ep->qp.sq_prod_qe = 312 &bnx2i_conn->ep->qp.sq_first_qe[count - 313 (tmp_cnt + 1)]; 314 } 315 } 316 bnx2i_conn->ep->qp.sq_prod_idx += count; 317 /* Ring the doorbell */ 318 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); 319} 320 321 322/** 323 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware 324 * @conn: iscsi connection 325 * @cmd: driver command structure which is requesting 326 * a WQE to sent to chip for further processing 327 * 328 * prepare and post an iSCSI Login request WQE to CNIC firmware 329 */ 330int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, 331 struct iscsi_task *task) 332{ 333 struct bnx2i_cmd *bnx2i_cmd; 334 struct bnx2i_login_request *login_wqe; 335 struct iscsi_login *login_hdr; 336 u32 dword; 337 338 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 339 login_hdr = (struct iscsi_login *)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 */ 385int 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_cmd *bnx2i_cmd; 393 struct bnx2i_tmf_request *tmfabort_wqe; 394 u32 dword; 395 u32 scsi_lun[2]; 396 397 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 398 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; 399 tmfabort_wqe = (struct bnx2i_tmf_request *) 400 bnx2i_conn->ep->qp.sq_prod_qe; 401 402 tmfabort_wqe->op_code = tmfabort_hdr->opcode; 403 tmfabort_wqe->op_attr = tmfabort_hdr->flags; 404 405 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); 406 tmfabort_wqe->reserved2 = 0; 407 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); 408 409 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { 410 case ISCSI_TM_FUNC_ABORT_TASK: 411 case ISCSI_TM_FUNC_TASK_REASSIGN: 412 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); 413 if (!ctask || !ctask->sc) 414 /* 415 * the iscsi layer must have completed the cmd while 416 * was starting up. 417 * 418 * Note: In the case of a SCSI cmd timeout, the task's 419 * sc is still active; hence ctask->sc != 0 420 * In this case, the task must be aborted 421 */ 422 return 0; 423 424 ref_sc = ctask->sc; 425 if (ref_sc->sc_data_direction == DMA_TO_DEVICE) 426 dword = (ISCSI_TASK_TYPE_WRITE << 427 ISCSI_CMD_REQUEST_TYPE_SHIFT); 428 else 429 dword = (ISCSI_TASK_TYPE_READ << 430 ISCSI_CMD_REQUEST_TYPE_SHIFT); 431 tmfabort_wqe->ref_itt = (dword | 432 (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); 433 break; 434 default: 435 tmfabort_wqe->ref_itt = RESERVED_ITT; 436 } 437 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun)); 438 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); 439 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); 440 441 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); 442 443 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 444 tmfabort_wqe->bd_list_addr_hi = (u32) 445 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 446 tmfabort_wqe->num_bds = 1; 447 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 448 449 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 450 return 0; 451} 452 453/** 454 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware 455 * @conn: iscsi connection 456 * @mtask: driver command structure which is requesting 457 * a WQE to sent to chip for further processing 458 * 459 * prepare and post an iSCSI Text request WQE to CNIC firmware 460 */ 461int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn, 462 struct iscsi_task *mtask) 463{ 464 struct bnx2i_cmd *bnx2i_cmd; 465 struct bnx2i_text_request *text_wqe; 466 struct iscsi_text *text_hdr; 467 u32 dword; 468 469 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 470 text_hdr = (struct iscsi_text *)mtask->hdr; 471 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe; 472 473 memset(text_wqe, 0, sizeof(struct bnx2i_text_request)); 474 475 text_wqe->op_code = text_hdr->opcode; 476 text_wqe->op_attr = text_hdr->flags; 477 text_wqe->data_length = ntoh24(text_hdr->dlength); 478 text_wqe->itt = mtask->itt | 479 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT); 480 text_wqe->ttt = be32_to_cpu(text_hdr->ttt); 481 482 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn); 483 484 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 485 text_wqe->resp_bd_list_addr_hi = 486 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 487 488 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) | 489 (bnx2i_conn->gen_pdu.resp_buf_size << 490 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 491 text_wqe->resp_buffer = dword; 492 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 493 text_wqe->bd_list_addr_hi = 494 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 495 text_wqe->num_bds = 1; 496 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 497 498 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 499 return 0; 500} 501 502 503/** 504 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware 505 * @conn: iscsi connection 506 * @cmd: driver command structure which is requesting 507 * a WQE to sent to chip for further processing 508 * 509 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware 510 */ 511int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, 512 struct bnx2i_cmd *cmd) 513{ 514 struct bnx2i_cmd_request *scsi_cmd_wqe; 515 516 scsi_cmd_wqe = (struct bnx2i_cmd_request *) 517 bnx2i_conn->ep->qp.sq_prod_qe; 518 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); 519 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 520 521 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 522 return 0; 523} 524 525/** 526 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware 527 * @conn: iscsi connection 528 * @cmd: driver command structure which is requesting 529 * a WQE to sent to chip for further processing 530 * @datap: payload buffer pointer 531 * @data_len: payload data length 532 * @unsol: indicated whether nopout pdu is unsolicited pdu or 533 * in response to target's NOPIN w/ TTT != FFFFFFFF 534 * 535 * prepare and post a nopout request WQE to CNIC firmware 536 */ 537int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, 538 struct iscsi_task *task, 539 char *datap, int data_len, int unsol) 540{ 541 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 542 struct bnx2i_cmd *bnx2i_cmd; 543 struct bnx2i_nop_out_request *nopout_wqe; 544 struct iscsi_nopout *nopout_hdr; 545 546 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 547 nopout_hdr = (struct iscsi_nopout *)task->hdr; 548 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; 549 550 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request)); 551 552 nopout_wqe->op_code = nopout_hdr->opcode; 553 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; 554 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8); 555 556 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 557 u32 tmp = nopout_wqe->lun[0]; 558 /* 57710 requires LUN field to be swapped */ 559 nopout_wqe->lun[0] = nopout_wqe->lun[1]; 560 nopout_wqe->lun[1] = tmp; 561 } 562 563 nopout_wqe->itt = ((u16)task->itt | 564 (ISCSI_TASK_TYPE_MPATH << 565 ISCSI_TMF_REQUEST_TYPE_SHIFT)); 566 nopout_wqe->ttt = nopout_hdr->ttt; 567 nopout_wqe->flags = 0; 568 if (!unsol) 569 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 570 else if (nopout_hdr->itt == RESERVED_ITT) 571 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 572 573 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 574 nopout_wqe->data_length = data_len; 575 if (data_len) { 576 /* handle payload data, not required in first release */ 577 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); 578 } else { 579 nopout_wqe->bd_list_addr_lo = (u32) 580 bnx2i_conn->hba->mp_bd_dma; 581 nopout_wqe->bd_list_addr_hi = 582 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 583 nopout_wqe->num_bds = 1; 584 } 585 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 586 587 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 588 return 0; 589} 590 591 592/** 593 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware 594 * @conn: iscsi connection 595 * @cmd: driver command structure which is requesting 596 * a WQE to sent to chip for further processing 597 * 598 * prepare and post logout request WQE to CNIC firmware 599 */ 600int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, 601 struct iscsi_task *task) 602{ 603 struct bnx2i_cmd *bnx2i_cmd; 604 struct bnx2i_logout_request *logout_wqe; 605 struct iscsi_logout *logout_hdr; 606 607 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 608 logout_hdr = (struct iscsi_logout *)task->hdr; 609 610 logout_wqe = (struct bnx2i_logout_request *) 611 bnx2i_conn->ep->qp.sq_prod_qe; 612 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); 613 614 logout_wqe->op_code = logout_hdr->opcode; 615 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 616 logout_wqe->op_attr = 617 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; 618 logout_wqe->itt = ((u16)task->itt | 619 (ISCSI_TASK_TYPE_MPATH << 620 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); 621 logout_wqe->data_length = 0; 622 logout_wqe->cid = 0; 623 624 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 625 logout_wqe->bd_list_addr_hi = (u32) 626 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 627 logout_wqe->num_bds = 1; 628 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 629 630 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; 631 632 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 633 return 0; 634} 635 636 637/** 638 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware 639 * @conn: iscsi connection which requires iscsi parameter update 640 * 641 * sends down iSCSI Conn Update request to move iSCSI conn to FFP 642 */ 643void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) 644{ 645 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 646 struct bnx2i_hba *hba = bnx2i_conn->hba; 647 struct kwqe *kwqe_arr[2]; 648 struct iscsi_kwqe_conn_update *update_wqe; 649 struct iscsi_kwqe_conn_update conn_update_kwqe; 650 651 update_wqe = &conn_update_kwqe; 652 653 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; 654 update_wqe->hdr.flags = 655 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 656 657 /* 5771x requires conn context id to be passed as is */ 658 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) 659 update_wqe->context_id = bnx2i_conn->ep->ep_cid; 660 else 661 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); 662 update_wqe->conn_flags = 0; 663 if (conn->hdrdgst_en) 664 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; 665 if (conn->datadgst_en) 666 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; 667 if (conn->session->initial_r2t_en) 668 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; 669 if (conn->session->imm_data_en) 670 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; 671 672 update_wqe->max_send_pdu_length = conn->max_xmit_dlength; 673 update_wqe->max_recv_pdu_length = conn->max_recv_dlength; 674 update_wqe->first_burst_length = conn->session->first_burst; 675 update_wqe->max_burst_length = conn->session->max_burst; 676 update_wqe->exp_stat_sn = conn->exp_statsn; 677 update_wqe->max_outstanding_r2ts = conn->session->max_r2t; 678 update_wqe->session_error_recovery_level = conn->session->erl; 679 iscsi_conn_printk(KERN_ALERT, conn, 680 "bnx2i: conn update - MBL 0x%x FBL 0x%x" 681 "MRDSL_I 0x%x MRDSL_T 0x%x \n", 682 update_wqe->max_burst_length, 683 update_wqe->first_burst_length, 684 update_wqe->max_recv_pdu_length, 685 update_wqe->max_send_pdu_length); 686 687 kwqe_arr[0] = (struct kwqe *) update_wqe; 688 if (hba->cnic && hba->cnic->submit_kwqes) 689 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 690} 691 692 693/** 694 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware 695 * @data: endpoint (transport handle) structure pointer 696 * 697 * routine to handle connection offload/destroy request timeout 698 */ 699void bnx2i_ep_ofld_timer(unsigned long data) 700{ 701 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data; 702 703 if (ep->state == EP_STATE_OFLD_START) { 704 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); 705 ep->state = EP_STATE_OFLD_FAILED; 706 } else if (ep->state == EP_STATE_DISCONN_START) { 707 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); 708 ep->state = EP_STATE_DISCONN_TIMEDOUT; 709 } else if (ep->state == EP_STATE_CLEANUP_START) { 710 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); 711 ep->state = EP_STATE_CLEANUP_FAILED; 712 } 713 714 wake_up_interruptible(&ep->ofld_wait); 715} 716 717 718static int bnx2i_power_of2(u32 val) 719{ 720 u32 power = 0; 721 if (val & (val - 1)) 722 return power; 723 val--; 724 while (val) { 725 val = val >> 1; 726 power++; 727 } 728 return power; 729} 730 731 732/** 733 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request 734 * @hba: adapter structure pointer 735 * @cmd: driver command structure which is requesting 736 * a WQE to sent to chip for further processing 737 * 738 * prepares and posts CONN_OFLD_REQ1/2 KWQE 739 */ 740void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 741{ 742 struct bnx2i_cleanup_request *cmd_cleanup; 743 744 cmd_cleanup = 745 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; 746 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); 747 748 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; 749 cmd_cleanup->itt = cmd->req.itt; 750 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ 751 752 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); 753} 754 755 756/** 757 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process 758 * @hba: adapter structure pointer 759 * @ep: endpoint (transport indentifier) structure 760 * 761 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate 762 * iscsi connection context clean-up process 763 */ 764int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 765{ 766 struct kwqe *kwqe_arr[2]; 767 struct iscsi_kwqe_conn_destroy conn_cleanup; 768 int rc = -EINVAL; 769 770 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); 771 772 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; 773 conn_cleanup.hdr.flags = 774 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 775 /* 5771x requires conn context id to be passed as is */ 776 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 777 conn_cleanup.context_id = ep->ep_cid; 778 else 779 conn_cleanup.context_id = (ep->ep_cid >> 7); 780 781 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; 782 783 kwqe_arr[0] = (struct kwqe *) &conn_cleanup; 784 if (hba->cnic && hba->cnic->submit_kwqes) 785 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 786 787 return rc; 788} 789 790 791/** 792 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process 793 * @hba: adapter structure pointer 794 * @ep: endpoint (transport indentifier) structure 795 * 796 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 797 */ 798static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, 799 struct bnx2i_endpoint *ep) 800{ 801 struct kwqe *kwqe_arr[2]; 802 struct iscsi_kwqe_conn_offload1 ofld_req1; 803 struct iscsi_kwqe_conn_offload2 ofld_req2; 804 dma_addr_t dma_addr; 805 int num_kwqes = 2; 806 u32 *ptbl; 807 int rc = -EINVAL; 808 809 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 810 ofld_req1.hdr.flags = 811 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 812 813 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 814 815 dma_addr = ep->qp.sq_pgtbl_phys; 816 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 817 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 818 819 dma_addr = ep->qp.cq_pgtbl_phys; 820 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 821 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 822 823 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 824 ofld_req2.hdr.flags = 825 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 826 827 dma_addr = ep->qp.rq_pgtbl_phys; 828 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 829 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 830 831 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 832 833 ofld_req2.sq_first_pte.hi = *ptbl++; 834 ofld_req2.sq_first_pte.lo = *ptbl; 835 836 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 837 ofld_req2.cq_first_pte.hi = *ptbl++; 838 ofld_req2.cq_first_pte.lo = *ptbl; 839 840 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 841 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 842 ofld_req2.num_additional_wqes = 0; 843 844 if (hba->cnic && hba->cnic->submit_kwqes) 845 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 846 847 return rc; 848} 849 850 851/** 852 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation 853 * @hba: adapter structure pointer 854 * @ep: endpoint (transport indentifier) structure 855 * 856 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 857 */ 858static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, 859 struct bnx2i_endpoint *ep) 860{ 861 struct kwqe *kwqe_arr[5]; 862 struct iscsi_kwqe_conn_offload1 ofld_req1; 863 struct iscsi_kwqe_conn_offload2 ofld_req2; 864 struct iscsi_kwqe_conn_offload3 ofld_req3[1]; 865 dma_addr_t dma_addr; 866 int num_kwqes = 2; 867 u32 *ptbl; 868 int rc = -EINVAL; 869 870 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 871 ofld_req1.hdr.flags = 872 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 873 874 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 875 876 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; 877 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 878 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 879 880 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; 881 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 882 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 883 884 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 885 ofld_req2.hdr.flags = 886 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 887 888 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; 889 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 890 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 891 892 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 893 ofld_req2.sq_first_pte.hi = *ptbl++; 894 ofld_req2.sq_first_pte.lo = *ptbl; 895 896 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 897 ofld_req2.cq_first_pte.hi = *ptbl++; 898 ofld_req2.cq_first_pte.lo = *ptbl; 899 900 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 901 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 902 903 ofld_req2.num_additional_wqes = 1; 904 memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); 905 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 906 ofld_req3[0].qp_first_pte[0].hi = *ptbl++; 907 ofld_req3[0].qp_first_pte[0].lo = *ptbl; 908 909 kwqe_arr[2] = (struct kwqe *) ofld_req3; 910 /* need if we decide to go with multiple KCQE's per conn */ 911 num_kwqes += 1; 912 913 if (hba->cnic && hba->cnic->submit_kwqes) 914 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 915 916 return rc; 917} 918 919/** 920 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process 921 * 922 * @hba: adapter structure pointer 923 * @ep: endpoint (transport indentifier) structure 924 * 925 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE 926 */ 927int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 928{ 929 int rc; 930 931 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 932 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); 933 else 934 rc = bnx2i_570x_send_conn_ofld_req(hba, ep); 935 936 return rc; 937} 938 939 940/** 941 * setup_qp_page_tables - iscsi QP page table setup function 942 * @ep: endpoint (transport indentifier) structure 943 * 944 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires 945 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires 946 * PT in little endian format 947 */ 948static void setup_qp_page_tables(struct bnx2i_endpoint *ep) 949{ 950 int num_pages; 951 u32 *ptbl; 952 dma_addr_t page; 953 int cnic_dev_10g; 954 955 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 956 cnic_dev_10g = 1; 957 else 958 cnic_dev_10g = 0; 959 960 /* SQ page table */ 961 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); 962 num_pages = ep->qp.sq_mem_size / PAGE_SIZE; 963 page = ep->qp.sq_phys; 964 965 if (cnic_dev_10g) 966 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 967 else 968 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 969 while (num_pages--) { 970 if (cnic_dev_10g) { 971 /* PTE is written in little endian format for 57710 */ 972 *ptbl = (u32) page; 973 ptbl++; 974 *ptbl = (u32) ((u64) page >> 32); 975 ptbl++; 976 page += PAGE_SIZE; 977 } else { 978 /* PTE is written in big endian format for 979 * 5706/5708/5709 devices */ 980 *ptbl = (u32) ((u64) page >> 32); 981 ptbl++; 982 *ptbl = (u32) page; 983 ptbl++; 984 page += PAGE_SIZE; 985 } 986 } 987 988 /* RQ page table */ 989 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); 990 num_pages = ep->qp.rq_mem_size / PAGE_SIZE; 991 page = ep->qp.rq_phys; 992 993 if (cnic_dev_10g) 994 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 995 else 996 ptbl = (u32 *) ep->qp.rq_pgtbl_virt; 997 while (num_pages--) { 998 if (cnic_dev_10g) { 999 /* PTE is written in little endian format for 57710 */ 1000 *ptbl = (u32) page; 1001 ptbl++; 1002 *ptbl = (u32) ((u64) page >> 32); 1003 ptbl++; 1004 page += PAGE_SIZE; 1005 } else { 1006 /* PTE is written in big endian format for 1007 * 5706/5708/5709 devices */ 1008 *ptbl = (u32) ((u64) page >> 32); 1009 ptbl++; 1010 *ptbl = (u32) page; 1011 ptbl++; 1012 page += PAGE_SIZE; 1013 } 1014 } 1015 1016 /* CQ page table */ 1017 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); 1018 num_pages = ep->qp.cq_mem_size / PAGE_SIZE; 1019 page = ep->qp.cq_phys; 1020 1021 if (cnic_dev_10g) 1022 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 1023 else 1024 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 1025 while (num_pages--) { 1026 if (cnic_dev_10g) { 1027 /* PTE is written in little endian format for 57710 */ 1028 *ptbl = (u32) page; 1029 ptbl++; 1030 *ptbl = (u32) ((u64) page >> 32); 1031 ptbl++; 1032 page += PAGE_SIZE; 1033 } else { 1034 /* PTE is written in big endian format for 1035 * 5706/5708/5709 devices */ 1036 *ptbl = (u32) ((u64) page >> 32); 1037 ptbl++; 1038 *ptbl = (u32) page; 1039 ptbl++; 1040 page += PAGE_SIZE; 1041 } 1042 } 1043} 1044 1045 1046/** 1047 * bnx2i_alloc_qp_resc - allocates required resources for QP. 1048 * @hba: adapter structure pointer 1049 * @ep: endpoint (transport indentifier) structure 1050 * 1051 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able 1052 * memory for SQ/RQ/CQ and page tables. EP structure elements such 1053 * as producer/consumer indexes/pointers, queue sizes and page table 1054 * contents are setup 1055 */ 1056int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1057{ 1058 struct bnx2i_5771x_cq_db *cq_db; 1059 1060 ep->hba = hba; 1061 ep->conn = NULL; 1062 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; 1063 1064 /* Allocate page table memory for SQ which is page aligned */ 1065 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; 1066 ep->qp.sq_mem_size = 1067 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1068 ep->qp.sq_pgtbl_size = 1069 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *); 1070 ep->qp.sq_pgtbl_size = 1071 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1072 1073 ep->qp.sq_pgtbl_virt = 1074 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1075 &ep->qp.sq_pgtbl_phys, GFP_KERNEL); 1076 if (!ep->qp.sq_pgtbl_virt) { 1077 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", 1078 ep->qp.sq_pgtbl_size); 1079 goto mem_alloc_err; 1080 } 1081 1082 /* Allocate memory area for actual SQ element */ 1083 ep->qp.sq_virt = 1084 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1085 &ep->qp.sq_phys, GFP_KERNEL); 1086 if (!ep->qp.sq_virt) { 1087 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", 1088 ep->qp.sq_mem_size); 1089 goto mem_alloc_err; 1090 } 1091 1092 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size); 1093 ep->qp.sq_first_qe = ep->qp.sq_virt; 1094 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1095 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1096 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1097 ep->qp.sq_prod_idx = 0; 1098 ep->qp.sq_cons_idx = 0; 1099 ep->qp.sqe_left = hba->max_sqes; 1100 1101 /* Allocate page table memory for CQ which is page aligned */ 1102 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1103 ep->qp.cq_mem_size = 1104 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1105 ep->qp.cq_pgtbl_size = 1106 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *); 1107 ep->qp.cq_pgtbl_size = 1108 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1109 1110 ep->qp.cq_pgtbl_virt = 1111 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1112 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1113 if (!ep->qp.cq_pgtbl_virt) { 1114 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1115 ep->qp.cq_pgtbl_size); 1116 goto mem_alloc_err; 1117 } 1118 1119 /* Allocate memory area for actual CQ element */ 1120 ep->qp.cq_virt = 1121 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1122 &ep->qp.cq_phys, GFP_KERNEL); 1123 if (!ep->qp.cq_virt) { 1124 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1125 ep->qp.cq_mem_size); 1126 goto mem_alloc_err; 1127 } 1128 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size); 1129 1130 ep->qp.cq_first_qe = ep->qp.cq_virt; 1131 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1132 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1133 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1134 ep->qp.cq_prod_idx = 0; 1135 ep->qp.cq_cons_idx = 0; 1136 ep->qp.cqe_left = hba->max_cqes; 1137 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1138 ep->qp.cqe_size = hba->max_cqes; 1139 1140 /* Invalidate all EQ CQE index, req only for 57710 */ 1141 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1142 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1143 1144 /* Allocate page table memory for RQ which is page aligned */ 1145 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1146 ep->qp.rq_mem_size = 1147 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1148 ep->qp.rq_pgtbl_size = 1149 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *); 1150 ep->qp.rq_pgtbl_size = 1151 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1152 1153 ep->qp.rq_pgtbl_virt = 1154 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1155 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1156 if (!ep->qp.rq_pgtbl_virt) { 1157 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1158 ep->qp.rq_pgtbl_size); 1159 goto mem_alloc_err; 1160 } 1161 1162 /* Allocate memory area for actual RQ element */ 1163 ep->qp.rq_virt = 1164 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1165 &ep->qp.rq_phys, GFP_KERNEL); 1166 if (!ep->qp.rq_virt) { 1167 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1168 ep->qp.rq_mem_size); 1169 goto mem_alloc_err; 1170 } 1171 1172 ep->qp.rq_first_qe = ep->qp.rq_virt; 1173 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1174 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1175 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1176 ep->qp.rq_prod_idx = 0x8000; 1177 ep->qp.rq_cons_idx = 0; 1178 ep->qp.rqe_left = hba->max_rqes; 1179 1180 setup_qp_page_tables(ep); 1181 1182 return 0; 1183 1184mem_alloc_err: 1185 bnx2i_free_qp_resc(hba, ep); 1186 return -ENOMEM; 1187} 1188 1189 1190 1191/** 1192 * bnx2i_free_qp_resc - free memory resources held by QP 1193 * @hba: adapter structure pointer 1194 * @ep: endpoint (transport indentifier) structure 1195 * 1196 * Free QP resources - SQ/RQ/CQ memory and page tables. 1197 */ 1198void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1199{ 1200 if (ep->qp.ctx_base) { 1201 iounmap(ep->qp.ctx_base); 1202 ep->qp.ctx_base = NULL; 1203 } 1204 /* Free SQ mem */ 1205 if (ep->qp.sq_pgtbl_virt) { 1206 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1207 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1208 ep->qp.sq_pgtbl_virt = NULL; 1209 ep->qp.sq_pgtbl_phys = 0; 1210 } 1211 if (ep->qp.sq_virt) { 1212 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1213 ep->qp.sq_virt, ep->qp.sq_phys); 1214 ep->qp.sq_virt = NULL; 1215 ep->qp.sq_phys = 0; 1216 } 1217 1218 /* Free RQ mem */ 1219 if (ep->qp.rq_pgtbl_virt) { 1220 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1221 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1222 ep->qp.rq_pgtbl_virt = NULL; 1223 ep->qp.rq_pgtbl_phys = 0; 1224 } 1225 if (ep->qp.rq_virt) { 1226 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1227 ep->qp.rq_virt, ep->qp.rq_phys); 1228 ep->qp.rq_virt = NULL; 1229 ep->qp.rq_phys = 0; 1230 } 1231 1232 /* Free CQ mem */ 1233 if (ep->qp.cq_pgtbl_virt) { 1234 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1235 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1236 ep->qp.cq_pgtbl_virt = NULL; 1237 ep->qp.cq_pgtbl_phys = 0; 1238 } 1239 if (ep->qp.cq_virt) { 1240 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1241 ep->qp.cq_virt, ep->qp.cq_phys); 1242 ep->qp.cq_virt = NULL; 1243 ep->qp.cq_phys = 0; 1244 } 1245} 1246 1247 1248/** 1249 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1250 * @hba: adapter structure pointer 1251 * 1252 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1253 * This results in iSCSi support validation and on-chip context manager 1254 * initialization. Firmware completes this handshake with a CQE carrying 1255 * the result of iscsi support validation. Parameter carried by 1256 * iscsi init request determines the number of offloaded connection and 1257 * tolerance level for iscsi protocol violation this hba/chip can support 1258 */ 1259int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1260{ 1261 struct kwqe *kwqe_arr[3]; 1262 struct iscsi_kwqe_init1 iscsi_init; 1263 struct iscsi_kwqe_init2 iscsi_init2; 1264 int rc = 0; 1265 u64 mask64; 1266 1267 bnx2i_adjust_qp_size(hba); 1268 1269 iscsi_init.flags = 1270 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1271 if (en_tcp_dack) 1272 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1273 iscsi_init.reserved0 = 0; 1274 iscsi_init.num_cqs = 1; 1275 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1276 iscsi_init.hdr.flags = 1277 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1278 1279 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1280 iscsi_init.dummy_buffer_addr_hi = 1281 (u32) ((u64) hba->dummy_buf_dma >> 32); 1282 1283 hba->num_ccell = hba->max_sqes >> 1; 1284 hba->ctx_ccell_tasks = 1285 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1286 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1287 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1288 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1289 iscsi_init.sq_num_wqes = hba->max_sqes; 1290 iscsi_init.cq_log_wqes_per_page = 1291 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE); 1292 iscsi_init.cq_num_wqes = hba->max_cqes; 1293 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1294 (PAGE_SIZE - 1)) / PAGE_SIZE; 1295 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1296 (PAGE_SIZE - 1)) / PAGE_SIZE; 1297 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1298 iscsi_init.rq_num_wqes = hba->max_rqes; 1299 1300 1301 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1302 iscsi_init2.hdr.flags = 1303 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1304 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1305 mask64 = 0x0ULL; 1306 mask64 |= ( 1307 /* CISCO MDS */ 1308 (1UL << 1309 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1310 /* HP MSA1510i */ 1311 (1UL << 1312 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1313 /* EMC */ 1314 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1315 if (error_mask1) 1316 iscsi_init2.error_bit_map[0] = error_mask1; 1317 else 1318 iscsi_init2.error_bit_map[0] = (u32) mask64; 1319 1320 if (error_mask2) 1321 iscsi_init2.error_bit_map[1] = error_mask2; 1322 else 1323 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1324 1325 iscsi_error_mask = mask64; 1326 1327 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1328 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1329 1330 if (hba->cnic && hba->cnic->submit_kwqes) 1331 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1332 return rc; 1333} 1334 1335 1336/** 1337 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1338 * @session: iscsi session 1339 * @bnx2i_conn: bnx2i connection 1340 * @cqe: pointer to newly DMA'ed CQE entry for processing 1341 * 1342 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1343 */ 1344int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1345 struct bnx2i_conn *bnx2i_conn, 1346 struct cqe *cqe) 1347{ 1348 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1349 struct bnx2i_cmd_response *resp_cqe; 1350 struct bnx2i_cmd *bnx2i_cmd; 1351 struct iscsi_task *task; 1352 struct iscsi_cmd_rsp *hdr; 1353 u32 datalen = 0; 1354 1355 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1356 spin_lock_bh(&session->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_outs; 1367 conn->rxdata_octets += 1368 bnx2i_cmd->req.total_data_transfer_length; 1369 } else { 1370 conn->dataout_pdus_cnt += 1371 resp_cqe->task_stat.read_stat.num_data_outs; 1372 conn->r2t_pdus_cnt += 1373 resp_cqe->task_stat.read_stat.num_r2ts; 1374 conn->txdata_octets += 1375 bnx2i_cmd->req.total_data_transfer_length; 1376 } 1377 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1378 1379 hdr = (struct iscsi_cmd_rsp *)task->hdr; 1380 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1381 hdr->opcode = resp_cqe->op_code; 1382 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1383 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1384 hdr->response = resp_cqe->response; 1385 hdr->cmd_status = resp_cqe->status; 1386 hdr->flags = resp_cqe->response_flags; 1387 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1388 1389 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1390 goto done; 1391 1392 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1393 datalen = resp_cqe->data_length; 1394 if (datalen < 2) 1395 goto done; 1396 1397 if (datalen > BNX2I_RQ_WQE_SIZE) { 1398 iscsi_conn_printk(KERN_ERR, conn, 1399 "sense data len %d > RQ sz\n", 1400 datalen); 1401 datalen = BNX2I_RQ_WQE_SIZE; 1402 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1403 iscsi_conn_printk(KERN_ERR, conn, 1404 "sense data len %d > conn data\n", 1405 datalen); 1406 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1407 } 1408 1409 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1410 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1411 } 1412 1413done: 1414 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1415 conn->data, datalen); 1416fail: 1417 spin_unlock_bh(&session->lock); 1418 return 0; 1419} 1420 1421 1422/** 1423 * bnx2i_process_login_resp - this function handles iscsi login response 1424 * @session: iscsi session pointer 1425 * @bnx2i_conn: iscsi connection pointer 1426 * @cqe: pointer to newly DMA'ed CQE entry for processing 1427 * 1428 * process Login Response CQE & complete it to open-iscsi user daemon 1429 */ 1430static int bnx2i_process_login_resp(struct iscsi_session *session, 1431 struct bnx2i_conn *bnx2i_conn, 1432 struct cqe *cqe) 1433{ 1434 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1435 struct iscsi_task *task; 1436 struct bnx2i_login_response *login; 1437 struct iscsi_login_rsp *resp_hdr; 1438 int pld_len; 1439 int pad_len; 1440 1441 login = (struct bnx2i_login_response *) cqe; 1442 spin_lock(&session->lock); 1443 task = iscsi_itt_to_task(conn, 1444 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1445 if (!task) 1446 goto done; 1447 1448 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1449 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1450 resp_hdr->opcode = login->op_code; 1451 resp_hdr->flags = login->response_flags; 1452 resp_hdr->max_version = login->version_max; 1453 resp_hdr->active_version = login->version_active; 1454 resp_hdr->hlength = 0; 1455 1456 hton24(resp_hdr->dlength, login->data_length); 1457 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1458 resp_hdr->tsih = cpu_to_be16(login->tsih); 1459 resp_hdr->itt = task->hdr->itt; 1460 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1461 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1462 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1463 resp_hdr->status_class = login->status_class; 1464 resp_hdr->status_detail = login->status_detail; 1465 pld_len = login->data_length; 1466 bnx2i_conn->gen_pdu.resp_wr_ptr = 1467 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1468 1469 pad_len = 0; 1470 if (pld_len & 0x3) 1471 pad_len = 4 - (pld_len % 4); 1472 1473 if (pad_len) { 1474 int i = 0; 1475 for (i = 0; i < pad_len; i++) { 1476 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1477 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1478 } 1479 } 1480 1481 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1482 bnx2i_conn->gen_pdu.resp_buf, 1483 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1484done: 1485 spin_unlock(&session->lock); 1486 return 0; 1487} 1488 1489 1490/** 1491 * bnx2i_process_text_resp - this function handles iscsi text response 1492 * @session: iscsi session pointer 1493 * @bnx2i_conn: iscsi connection pointer 1494 * @cqe: pointer to newly DMA'ed CQE entry for processing 1495 * 1496 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon 1497 */ 1498static int bnx2i_process_text_resp(struct iscsi_session *session, 1499 struct bnx2i_conn *bnx2i_conn, 1500 struct cqe *cqe) 1501{ 1502 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1503 struct iscsi_task *task; 1504 struct bnx2i_text_response *text; 1505 struct iscsi_text_rsp *resp_hdr; 1506 int pld_len; 1507 int pad_len; 1508 1509 text = (struct bnx2i_text_response *) cqe; 1510 spin_lock(&session->lock); 1511 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1512 if (!task) 1513 goto done; 1514 1515 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; 1516 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1517 resp_hdr->opcode = text->op_code; 1518 resp_hdr->flags = text->response_flags; 1519 resp_hdr->hlength = 0; 1520 1521 hton24(resp_hdr->dlength, text->data_length); 1522 resp_hdr->itt = task->hdr->itt; 1523 resp_hdr->ttt = cpu_to_be32(text->ttt); 1524 resp_hdr->statsn = task->hdr->exp_statsn; 1525 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); 1526 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); 1527 pld_len = text->data_length; 1528 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + 1529 pld_len; 1530 pad_len = 0; 1531 if (pld_len & 0x3) 1532 pad_len = 4 - (pld_len % 4); 1533 1534 if (pad_len) { 1535 int i = 0; 1536 for (i = 0; i < pad_len; i++) { 1537 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1538 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1539 } 1540 } 1541 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1542 bnx2i_conn->gen_pdu.resp_buf, 1543 bnx2i_conn->gen_pdu.resp_wr_ptr - 1544 bnx2i_conn->gen_pdu.resp_buf); 1545done: 1546 spin_unlock(&session->lock); 1547 return 0; 1548} 1549 1550 1551/** 1552 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1553 * @session: iscsi session pointer 1554 * @bnx2i_conn: iscsi connection pointer 1555 * @cqe: pointer to newly DMA'ed CQE entry for processing 1556 * 1557 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1558 */ 1559static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1560 struct bnx2i_conn *bnx2i_conn, 1561 struct cqe *cqe) 1562{ 1563 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1564 struct iscsi_task *task; 1565 struct bnx2i_tmf_response *tmf_cqe; 1566 struct iscsi_tm_rsp *resp_hdr; 1567 1568 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1569 spin_lock(&session->lock); 1570 task = iscsi_itt_to_task(conn, 1571 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1572 if (!task) 1573 goto done; 1574 1575 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1576 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1577 resp_hdr->opcode = tmf_cqe->op_code; 1578 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1579 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1580 resp_hdr->itt = task->hdr->itt; 1581 resp_hdr->response = tmf_cqe->response; 1582 1583 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1584done: 1585 spin_unlock(&session->lock); 1586 return 0; 1587} 1588 1589/** 1590 * bnx2i_process_logout_resp - this function handles iscsi logout response 1591 * @session: iscsi session pointer 1592 * @bnx2i_conn: iscsi connection pointer 1593 * @cqe: pointer to newly DMA'ed CQE entry for processing 1594 * 1595 * process iSCSI Logout Response CQE & make function call to 1596 * notify the user daemon. 1597 */ 1598static int bnx2i_process_logout_resp(struct iscsi_session *session, 1599 struct bnx2i_conn *bnx2i_conn, 1600 struct cqe *cqe) 1601{ 1602 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1603 struct iscsi_task *task; 1604 struct bnx2i_logout_response *logout; 1605 struct iscsi_logout_rsp *resp_hdr; 1606 1607 logout = (struct bnx2i_logout_response *) cqe; 1608 spin_lock(&session->lock); 1609 task = iscsi_itt_to_task(conn, 1610 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1611 if (!task) 1612 goto done; 1613 1614 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1615 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1616 resp_hdr->opcode = logout->op_code; 1617 resp_hdr->flags = logout->response; 1618 resp_hdr->hlength = 0; 1619 1620 resp_hdr->itt = task->hdr->itt; 1621 resp_hdr->statsn = task->hdr->exp_statsn; 1622 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1623 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1624 1625 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1626 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1627 1628 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1629 1630 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1631done: 1632 spin_unlock(&session->lock); 1633 return 0; 1634} 1635 1636/** 1637 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1638 * @session: iscsi session pointer 1639 * @bnx2i_conn: iscsi connection pointer 1640 * @cqe: pointer to newly DMA'ed CQE entry for processing 1641 * 1642 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1643 */ 1644static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1645 struct bnx2i_conn *bnx2i_conn, 1646 struct cqe *cqe) 1647{ 1648 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1649 struct bnx2i_nop_in_msg *nop_in; 1650 struct iscsi_task *task; 1651 1652 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1653 spin_lock(&session->lock); 1654 task = iscsi_itt_to_task(conn, 1655 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1656 if (task) 1657 __iscsi_put_task(task); 1658 spin_unlock(&session->lock); 1659} 1660 1661/** 1662 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1663 * @conn: iscsi connection 1664 * 1665 * Firmware advances RQ producer index for every unsolicited PDU even if 1666 * payload data length is '0'. This function makes corresponding 1667 * adjustments on the driver side to match this f/w behavior 1668 */ 1669static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1670{ 1671 char dummy_rq_data[2]; 1672 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1673 bnx2i_put_rq_buf(bnx2i_conn, 1); 1674} 1675 1676 1677/** 1678 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1679 * @session: iscsi session pointer 1680 * @bnx2i_conn: iscsi connection pointer 1681 * @cqe: pointer to newly DMA'ed CQE entry for processing 1682 * 1683 * process iSCSI target's proactive iSCSI NOPIN request 1684 */ 1685static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1686 struct bnx2i_conn *bnx2i_conn, 1687 struct cqe *cqe) 1688{ 1689 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1690 struct iscsi_task *task; 1691 struct bnx2i_nop_in_msg *nop_in; 1692 struct iscsi_nopin *hdr; 1693 int tgt_async_nop = 0; 1694 1695 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1696 1697 spin_lock(&session->lock); 1698 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1699 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1700 hdr->opcode = nop_in->op_code; 1701 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1702 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1703 hdr->ttt = cpu_to_be32(nop_in->ttt); 1704 1705 if (nop_in->itt == (u16) RESERVED_ITT) { 1706 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1707 hdr->itt = RESERVED_ITT; 1708 tgt_async_nop = 1; 1709 goto done; 1710 } 1711 1712 /* this is a response to one of our nop-outs */ 1713 task = iscsi_itt_to_task(conn, 1714 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1715 if (task) { 1716 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1717 hdr->itt = task->hdr->itt; 1718 hdr->ttt = cpu_to_be32(nop_in->ttt); 1719 memcpy(&hdr->lun, nop_in->lun, 8); 1720 } 1721done: 1722 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1723 spin_unlock(&session->lock); 1724 1725 return tgt_async_nop; 1726} 1727 1728 1729/** 1730 * bnx2i_process_async_mesg - this function handles iscsi async message 1731 * @session: iscsi session pointer 1732 * @bnx2i_conn: iscsi connection pointer 1733 * @cqe: pointer to newly DMA'ed CQE entry for processing 1734 * 1735 * process iSCSI ASYNC Message 1736 */ 1737static void bnx2i_process_async_mesg(struct iscsi_session *session, 1738 struct bnx2i_conn *bnx2i_conn, 1739 struct cqe *cqe) 1740{ 1741 struct bnx2i_async_msg *async_cqe; 1742 struct iscsi_async *resp_hdr; 1743 u8 async_event; 1744 1745 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1746 1747 async_cqe = (struct bnx2i_async_msg *)cqe; 1748 async_event = async_cqe->async_event; 1749 1750 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1751 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1752 "async: scsi events not supported\n"); 1753 return; 1754 } 1755 1756 spin_lock(&session->lock); 1757 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1758 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1759 resp_hdr->opcode = async_cqe->op_code; 1760 resp_hdr->flags = 0x80; 1761 1762 memcpy(&resp_hdr->lun, async_cqe->lun, 8); 1763 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1764 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1765 1766 resp_hdr->async_event = async_cqe->async_event; 1767 resp_hdr->async_vcode = async_cqe->async_vcode; 1768 1769 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1770 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1771 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1772 1773 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1774 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1775 spin_unlock(&session->lock); 1776} 1777 1778 1779/** 1780 * bnx2i_process_reject_mesg - process iscsi reject pdu 1781 * @session: iscsi session pointer 1782 * @bnx2i_conn: iscsi connection pointer 1783 * @cqe: pointer to newly DMA'ed CQE entry for processing 1784 * 1785 * process iSCSI REJECT message 1786 */ 1787static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1788 struct bnx2i_conn *bnx2i_conn, 1789 struct cqe *cqe) 1790{ 1791 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1792 struct bnx2i_reject_msg *reject; 1793 struct iscsi_reject *hdr; 1794 1795 reject = (struct bnx2i_reject_msg *) cqe; 1796 if (reject->data_length) { 1797 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1798 bnx2i_put_rq_buf(bnx2i_conn, 1); 1799 } else 1800 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1801 1802 spin_lock(&session->lock); 1803 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1804 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1805 hdr->opcode = reject->op_code; 1806 hdr->reason = reject->reason; 1807 hton24(hdr->dlength, reject->data_length); 1808 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1809 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1810 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1811 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1812 reject->data_length); 1813 spin_unlock(&session->lock); 1814} 1815 1816/** 1817 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1818 * @session: iscsi session pointer 1819 * @bnx2i_conn: iscsi connection pointer 1820 * @cqe: pointer to newly DMA'ed CQE entry for processing 1821 * 1822 * process command cleanup response CQE during conn shutdown or error recovery 1823 */ 1824static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1825 struct bnx2i_conn *bnx2i_conn, 1826 struct cqe *cqe) 1827{ 1828 struct bnx2i_cleanup_response *cmd_clean_rsp; 1829 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1830 struct iscsi_task *task; 1831 1832 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1833 spin_lock(&session->lock); 1834 task = iscsi_itt_to_task(conn, 1835 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1836 if (!task) 1837 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1838 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1839 spin_unlock(&session->lock); 1840 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1841} 1842 1843 1844/** 1845 * bnx2i_percpu_io_thread - thread per cpu for ios 1846 * 1847 * @arg: ptr to bnx2i_percpu_info structure 1848 */ 1849int bnx2i_percpu_io_thread(void *arg) 1850{ 1851 struct bnx2i_percpu_s *p = arg; 1852 struct bnx2i_work *work, *tmp; 1853 LIST_HEAD(work_list); 1854 1855 set_user_nice(current, -20); 1856 1857 while (!kthread_should_stop()) { 1858 spin_lock_bh(&p->p_work_lock); 1859 while (!list_empty(&p->work_list)) { 1860 list_splice_init(&p->work_list, &work_list); 1861 spin_unlock_bh(&p->p_work_lock); 1862 1863 list_for_each_entry_safe(work, tmp, &work_list, list) { 1864 list_del_init(&work->list); 1865 /* work allocated in the bh, freed here */ 1866 bnx2i_process_scsi_cmd_resp(work->session, 1867 work->bnx2i_conn, 1868 &work->cqe); 1869 atomic_dec(&work->bnx2i_conn->work_cnt); 1870 kfree(work); 1871 } 1872 spin_lock_bh(&p->p_work_lock); 1873 } 1874 set_current_state(TASK_INTERRUPTIBLE); 1875 spin_unlock_bh(&p->p_work_lock); 1876 schedule(); 1877 } 1878 __set_current_state(TASK_RUNNING); 1879 1880 return 0; 1881} 1882 1883 1884/** 1885 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread 1886 * @bnx2i_conn: bnx2i connection 1887 * 1888 * this function is called by generic KCQ handler to queue all pending cmd 1889 * completion CQEs 1890 * 1891 * The implementation is to queue the cmd response based on the 1892 * last recorded command for the given connection. The 1893 * cpu_id gets recorded upon task_xmit. No out-of-order completion! 1894 */ 1895static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, 1896 struct bnx2i_conn *bnx2i_conn, 1897 struct bnx2i_nop_in_msg *cqe) 1898{ 1899 struct bnx2i_work *bnx2i_work = NULL; 1900 struct bnx2i_percpu_s *p = NULL; 1901 struct iscsi_task *task; 1902 struct scsi_cmnd *sc; 1903 int rc = 0; 1904 int cpu; 1905 1906 spin_lock(&session->lock); 1907 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, 1908 cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1909 if (!task) { 1910 spin_unlock(&session->lock); 1911 return -EINVAL; 1912 } 1913 sc = task->sc; 1914 spin_unlock(&session->lock); 1915 1916 if (!blk_rq_cpu_valid(sc->request)) 1917 cpu = smp_processor_id(); 1918 else 1919 cpu = sc->request->cpu; 1920 1921 p = &per_cpu(bnx2i_percpu, cpu); 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 qp_info *qp; 1960 struct bnx2i_nop_in_msg *nopin; 1961 int tgt_async_msg; 1962 int cqe_cnt = 0; 1963 1964 if (bnx2i_conn->ep == NULL) 1965 return 0; 1966 1967 qp = &bnx2i_conn->ep->qp; 1968 1969 if (!qp->cq_virt) { 1970 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", 1971 bnx2i_conn->hba->netdev->name); 1972 goto out; 1973 } 1974 while (1) { 1975 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1976 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1977 break; 1978 1979 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { 1980 if (nopin->op_code == ISCSI_OP_NOOP_IN && 1981 nopin->itt == (u16) RESERVED_ITT) { 1982 printk(KERN_ALERT "bnx2i: Unsolicited " 1983 "NOP-In detected for suspended " 1984 "connection dev=%s!\n", 1985 bnx2i_conn->hba->netdev->name); 1986 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1987 goto cqe_out; 1988 } 1989 break; 1990 } 1991 tgt_async_msg = 0; 1992 1993 switch (nopin->op_code) { 1994 case ISCSI_OP_SCSI_CMD_RSP: 1995 case ISCSI_OP_SCSI_DATA_IN: 1996 /* Run the kthread engine only for data cmds 1997 All other cmds will be completed in this bh! */ 1998 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); 1999 break; 2000 case ISCSI_OP_LOGIN_RSP: 2001 bnx2i_process_login_resp(session, bnx2i_conn, 2002 qp->cq_cons_qe); 2003 break; 2004 case ISCSI_OP_SCSI_TMFUNC_RSP: 2005 bnx2i_process_tmf_resp(session, bnx2i_conn, 2006 qp->cq_cons_qe); 2007 break; 2008 case ISCSI_OP_TEXT_RSP: 2009 bnx2i_process_text_resp(session, bnx2i_conn, 2010 qp->cq_cons_qe); 2011 break; 2012 case ISCSI_OP_LOGOUT_RSP: 2013 bnx2i_process_logout_resp(session, bnx2i_conn, 2014 qp->cq_cons_qe); 2015 break; 2016 case ISCSI_OP_NOOP_IN: 2017 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 2018 qp->cq_cons_qe)) 2019 tgt_async_msg = 1; 2020 break; 2021 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 2022 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 2023 qp->cq_cons_qe); 2024 break; 2025 case ISCSI_OP_ASYNC_EVENT: 2026 bnx2i_process_async_mesg(session, bnx2i_conn, 2027 qp->cq_cons_qe); 2028 tgt_async_msg = 1; 2029 break; 2030 case ISCSI_OP_REJECT: 2031 bnx2i_process_reject_mesg(session, bnx2i_conn, 2032 qp->cq_cons_qe); 2033 break; 2034 case ISCSI_OPCODE_CLEANUP_RESPONSE: 2035 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 2036 qp->cq_cons_qe); 2037 break; 2038 default: 2039 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2040 nopin->op_code); 2041 } 2042 if (!tgt_async_msg) { 2043 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) 2044 printk(KERN_ALERT "bnx2i (%s): no active cmd! " 2045 "op 0x%x\n", 2046 bnx2i_conn->hba->netdev->name, 2047 nopin->op_code); 2048 else 2049 atomic_dec(&bnx2i_conn->ep->num_active_cmds); 2050 } 2051cqe_out: 2052 /* clear out in production version only, till beta keep opcode 2053 * field intact, will be helpful in debugging (context dump) 2054 * nopin->op_code = 0; 2055 */ 2056 cqe_cnt++; 2057 qp->cqe_exp_seq_sn++; 2058 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 2059 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 2060 2061 if (qp->cq_cons_qe == qp->cq_last_qe) { 2062 qp->cq_cons_qe = qp->cq_first_qe; 2063 qp->cq_cons_idx = 0; 2064 } else { 2065 qp->cq_cons_qe++; 2066 qp->cq_cons_idx++; 2067 } 2068 } 2069out: 2070 return cqe_cnt; 2071} 2072 2073/** 2074 * bnx2i_fastpath_notification - process global event queue (KCQ) 2075 * @hba: adapter structure pointer 2076 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 2077 * 2078 * Fast path event notification handler, KCQ entry carries context id 2079 * of the connection that has 1 or more pending CQ entries 2080 */ 2081static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 2082 struct iscsi_kcqe *new_cqe_kcqe) 2083{ 2084 struct bnx2i_conn *bnx2i_conn; 2085 u32 iscsi_cid; 2086 int nxt_idx; 2087 2088 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 2089 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2090 2091 if (!bnx2i_conn) { 2092 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 2093 return; 2094 } 2095 if (!bnx2i_conn->ep) { 2096 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 2097 return; 2098 } 2099 2100 bnx2i_process_new_cqes(bnx2i_conn); 2101 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, 2102 CNIC_ARM_CQE_FP); 2103 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) 2104 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); 2105} 2106 2107 2108/** 2109 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 2110 * @hba: adapter structure pointer 2111 * @update_kcqe: kcqe pointer 2112 * 2113 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 2114 */ 2115static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 2116 struct iscsi_kcqe *update_kcqe) 2117{ 2118 struct bnx2i_conn *conn; 2119 u32 iscsi_cid; 2120 2121 iscsi_cid = update_kcqe->iscsi_conn_id; 2122 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2123 2124 if (!conn) { 2125 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 2126 return; 2127 } 2128 if (!conn->ep) { 2129 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 2130 return; 2131 } 2132 2133 if (update_kcqe->completion_status) { 2134 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 2135 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 2136 } else 2137 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 2138 2139 wake_up_interruptible(&conn->ep->ofld_wait); 2140} 2141 2142 2143/** 2144 * bnx2i_recovery_que_add_conn - add connection to recovery queue 2145 * @hba: adapter structure pointer 2146 * @bnx2i_conn: iscsi connection 2147 * 2148 * Add connection to recovery queue and schedule adapter eh worker 2149 */ 2150static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 2151 struct bnx2i_conn *bnx2i_conn) 2152{ 2153 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 2154 ISCSI_ERR_CONN_FAILED); 2155} 2156 2157 2158/** 2159 * bnx2i_process_tcp_error - process error notification on a given connection 2160 * 2161 * @hba: adapter structure pointer 2162 * @tcp_err: tcp error kcqe pointer 2163 * 2164 * handles tcp level error notifications from FW. 2165 */ 2166static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 2167 struct iscsi_kcqe *tcp_err) 2168{ 2169 struct bnx2i_conn *bnx2i_conn; 2170 u32 iscsi_cid; 2171 2172 iscsi_cid = tcp_err->iscsi_conn_id; 2173 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2174 2175 if (!bnx2i_conn) { 2176 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2177 return; 2178 } 2179 2180 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 2181 iscsi_cid, tcp_err->completion_status); 2182 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2183} 2184 2185 2186/** 2187 * bnx2i_process_iscsi_error - process error notification on a given connection 2188 * @hba: adapter structure pointer 2189 * @iscsi_err: iscsi error kcqe pointer 2190 * 2191 * handles iscsi error notifications from the FW. Firmware based in initial 2192 * handshake classifies iscsi protocol / TCP rfc violation into either 2193 * warning or error indications. If indication is of "Error" type, driver 2194 * will initiate session recovery for that connection/session. For 2195 * "Warning" type indication, driver will put out a system log message 2196 * (there will be only one message for each type for the life of the 2197 * session, this is to avoid un-necessarily overloading the system) 2198 */ 2199static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 2200 struct iscsi_kcqe *iscsi_err) 2201{ 2202 struct bnx2i_conn *bnx2i_conn; 2203 u32 iscsi_cid; 2204 char warn_notice[] = "iscsi_warning"; 2205 char error_notice[] = "iscsi_error"; 2206 char additional_notice[64]; 2207 char *message; 2208 int need_recovery; 2209 u64 err_mask64; 2210 2211 iscsi_cid = iscsi_err->iscsi_conn_id; 2212 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2213 if (!bnx2i_conn) { 2214 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2215 return; 2216 } 2217 2218 err_mask64 = (0x1ULL << iscsi_err->completion_status); 2219 2220 if (err_mask64 & iscsi_error_mask) { 2221 need_recovery = 0; 2222 message = warn_notice; 2223 } else { 2224 need_recovery = 1; 2225 message = error_notice; 2226 } 2227 2228 switch (iscsi_err->completion_status) { 2229 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 2230 strcpy(additional_notice, "hdr digest err"); 2231 break; 2232 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 2233 strcpy(additional_notice, "data digest err"); 2234 break; 2235 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 2236 strcpy(additional_notice, "wrong opcode rcvd"); 2237 break; 2238 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 2239 strcpy(additional_notice, "AHS len > 0 rcvd"); 2240 break; 2241 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 2242 strcpy(additional_notice, "invalid ITT rcvd"); 2243 break; 2244 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 2245 strcpy(additional_notice, "wrong StatSN rcvd"); 2246 break; 2247 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 2248 strcpy(additional_notice, "wrong DataSN rcvd"); 2249 break; 2250 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 2251 strcpy(additional_notice, "pend R2T violation"); 2252 break; 2253 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 2254 strcpy(additional_notice, "ERL0, UO"); 2255 break; 2256 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2257 strcpy(additional_notice, "ERL0, U1"); 2258 break; 2259 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2260 strcpy(additional_notice, "ERL0, U2"); 2261 break; 2262 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2263 strcpy(additional_notice, "ERL0, U3"); 2264 break; 2265 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2266 strcpy(additional_notice, "ERL0, U4"); 2267 break; 2268 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2269 strcpy(additional_notice, "ERL0, U5"); 2270 break; 2271 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2272 strcpy(additional_notice, "ERL0, U6"); 2273 break; 2274 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2275 strcpy(additional_notice, "invalid resi len"); 2276 break; 2277 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2278 strcpy(additional_notice, "MRDSL violation"); 2279 break; 2280 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2281 strcpy(additional_notice, "F-bit not set"); 2282 break; 2283 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2284 strcpy(additional_notice, "invalid TTT"); 2285 break; 2286 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2287 strcpy(additional_notice, "invalid DataSN"); 2288 break; 2289 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2290 strcpy(additional_notice, "burst len violation"); 2291 break; 2292 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2293 strcpy(additional_notice, "buf offset violation"); 2294 break; 2295 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2296 strcpy(additional_notice, "invalid LUN field"); 2297 break; 2298 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2299 strcpy(additional_notice, "invalid R2TSN field"); 2300 break; 2301#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2302 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2303 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2304 strcpy(additional_notice, "invalid cmd len1"); 2305 break; 2306#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2307 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2308 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2309 strcpy(additional_notice, "invalid cmd len2"); 2310 break; 2311 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2312 strcpy(additional_notice, 2313 "pend r2t exceeds MaxOutstandingR2T value"); 2314 break; 2315 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2316 strcpy(additional_notice, "TTT is rsvd"); 2317 break; 2318 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2319 strcpy(additional_notice, "MBL violation"); 2320 break; 2321#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2322 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2323 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2324 strcpy(additional_notice, "data seg len != 0"); 2325 break; 2326 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2327 strcpy(additional_notice, "reject pdu len error"); 2328 break; 2329 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2330 strcpy(additional_notice, "async pdu len error"); 2331 break; 2332 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2333 strcpy(additional_notice, "nopin pdu len error"); 2334 break; 2335#define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2336 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2337 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2338 strcpy(additional_notice, "pend r2t in cleanup"); 2339 break; 2340 2341 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2342 strcpy(additional_notice, "IP fragments rcvd"); 2343 break; 2344 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2345 strcpy(additional_notice, "IP options error"); 2346 break; 2347 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2348 strcpy(additional_notice, "urgent flag error"); 2349 break; 2350 default: 2351 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2352 iscsi_err->completion_status); 2353 } 2354 2355 if (need_recovery) { 2356 iscsi_conn_printk(KERN_ALERT, 2357 bnx2i_conn->cls_conn->dd_data, 2358 "bnx2i: %s - %s\n", 2359 message, additional_notice); 2360 2361 iscsi_conn_printk(KERN_ALERT, 2362 bnx2i_conn->cls_conn->dd_data, 2363 "conn_err - hostno %d conn %p, " 2364 "iscsi_cid %x cid %x\n", 2365 bnx2i_conn->hba->shost->host_no, 2366 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2367 bnx2i_conn->ep->ep_cid); 2368 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2369 } else 2370 if (!test_and_set_bit(iscsi_err->completion_status, 2371 (void *) &bnx2i_conn->violation_notified)) 2372 iscsi_conn_printk(KERN_ALERT, 2373 bnx2i_conn->cls_conn->dd_data, 2374 "bnx2i: %s - %s\n", 2375 message, additional_notice); 2376} 2377 2378 2379/** 2380 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2381 * @hba: adapter structure pointer 2382 * @conn_destroy: conn destroy kcqe pointer 2383 * 2384 * handles connection destroy completion request. 2385 */ 2386static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2387 struct iscsi_kcqe *conn_destroy) 2388{ 2389 struct bnx2i_endpoint *ep; 2390 2391 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2392 if (!ep) { 2393 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2394 "offload request, unexpected complection\n"); 2395 return; 2396 } 2397 2398 if (hba != ep->hba) { 2399 printk(KERN_ALERT "conn destroy- error hba mis-match\n"); 2400 return; 2401 } 2402 2403 if (conn_destroy->completion_status) { 2404 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2405 ep->state = EP_STATE_CLEANUP_FAILED; 2406 } else 2407 ep->state = EP_STATE_CLEANUP_CMPL; 2408 wake_up_interruptible(&ep->ofld_wait); 2409} 2410 2411 2412/** 2413 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2414 * @hba: adapter structure pointer 2415 * @ofld_kcqe: conn offload kcqe pointer 2416 * 2417 * handles initial connection offload completion, ep_connect() thread is 2418 * woken-up to continue with LLP connect process 2419 */ 2420static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2421 struct iscsi_kcqe *ofld_kcqe) 2422{ 2423 u32 cid_addr; 2424 struct bnx2i_endpoint *ep; 2425 u32 cid_num; 2426 2427 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2428 if (!ep) { 2429 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2430 return; 2431 } 2432 2433 if (hba != ep->hba) { 2434 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n"); 2435 return; 2436 } 2437 2438 if (ofld_kcqe->completion_status) { 2439 ep->state = EP_STATE_OFLD_FAILED; 2440 if (ofld_kcqe->completion_status == 2441 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2442 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2443 "to allocate iSCSI context resources\n", 2444 hba->netdev->name); 2445 else if (ofld_kcqe->completion_status == 2446 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2447 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2448 "opcode\n", hba->netdev->name); 2449 else if (ofld_kcqe->completion_status == 2450 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2451 /* error status code valid only for 5771x chipset */ 2452 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2453 else 2454 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2455 "error code %d\n", hba->netdev->name, 2456 ofld_kcqe->completion_status); 2457 } else { 2458 ep->state = EP_STATE_OFLD_COMPL; 2459 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2460 cid_num = bnx2i_get_cid_num(ep); 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 * @hba: adapter structure pointer 2470 * @update_kcqe: kcqe pointer 2471 * 2472 * Generic KCQ event handler/dispatcher 2473 */ 2474static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2475 u32 num_cqe) 2476{ 2477 struct bnx2i_hba *hba = context; 2478 int i = 0; 2479 struct iscsi_kcqe *ikcqe = NULL; 2480 2481 while (i < num_cqe) { 2482 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2483 2484 if (ikcqe->op_code == 2485 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2486 bnx2i_fastpath_notification(hba, ikcqe); 2487 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2488 bnx2i_process_ofld_cmpl(hba, ikcqe); 2489 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2490 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2491 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2492 if (ikcqe->completion_status != 2493 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2494 bnx2i_iscsi_license_error(hba, ikcqe->\ 2495 completion_status); 2496 else { 2497 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2498 bnx2i_get_link_state(hba); 2499 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2500 "ISCSI_INIT passed\n", 2501 (u8)hba->pcidev->bus->number, 2502 hba->pci_devno, 2503 (u8)hba->pci_func); 2504 2505 2506 } 2507 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2508 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2509 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2510 bnx2i_process_iscsi_error(hba, ikcqe); 2511 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2512 bnx2i_process_tcp_error(hba, ikcqe); 2513 else 2514 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2515 ikcqe->op_code); 2516 } 2517} 2518 2519 2520/** 2521 * bnx2i_indicate_netevent - Generic netdev event handler 2522 * @context: adapter structure pointer 2523 * @event: event type 2524 * 2525 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2526 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2527 */ 2528static void bnx2i_indicate_netevent(void *context, unsigned long event) 2529{ 2530 struct bnx2i_hba *hba = context; 2531 2532 switch (event) { 2533 case NETDEV_UP: 2534 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2535 bnx2i_send_fw_iscsi_init_msg(hba); 2536 break; 2537 case NETDEV_DOWN: 2538 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2539 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2540 break; 2541 case NETDEV_GOING_DOWN: 2542 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2543 iscsi_host_for_each_session(hba->shost, 2544 bnx2i_drop_session); 2545 break; 2546 case NETDEV_CHANGE: 2547 bnx2i_get_link_state(hba); 2548 break; 2549 default: 2550 ; 2551 } 2552} 2553 2554 2555/** 2556 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2557 * @cm_sk: cnic sock structure pointer 2558 * 2559 * function callback exported via bnx2i - cnic driver interface to 2560 * indicate completion of option-2 TCP connect request. 2561 */ 2562static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2563{ 2564 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2565 2566 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2567 ep->state = EP_STATE_CONNECT_FAILED; 2568 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2569 ep->state = EP_STATE_CONNECT_COMPL; 2570 else 2571 ep->state = EP_STATE_CONNECT_FAILED; 2572 2573 wake_up_interruptible(&ep->ofld_wait); 2574} 2575 2576 2577/** 2578 * bnx2i_cm_close_cmpl - process tcp conn close 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 graceful TCP connect shutdown 2583 */ 2584static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2585{ 2586 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2587 2588 ep->state = EP_STATE_DISCONN_COMPL; 2589 wake_up_interruptible(&ep->ofld_wait); 2590} 2591 2592 2593/** 2594 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2595 * @cm_sk: cnic sock structure pointer 2596 * 2597 * function callback exported via bnx2i - cnic driver interface to 2598 * indicate completion of option-2 abortive TCP connect termination 2599 */ 2600static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2601{ 2602 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2603 2604 ep->state = EP_STATE_DISCONN_COMPL; 2605 wake_up_interruptible(&ep->ofld_wait); 2606} 2607 2608 2609/** 2610 * bnx2i_cm_remote_close - process received TCP FIN 2611 * @hba: adapter structure pointer 2612 * @update_kcqe: kcqe pointer 2613 * 2614 * function callback exported via bnx2i - cnic driver interface to indicate 2615 * async TCP events such as FIN 2616 */ 2617static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2618{ 2619 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2620 2621 ep->state = EP_STATE_TCP_FIN_RCVD; 2622 if (ep->conn) 2623 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2624} 2625 2626/** 2627 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2628 * @hba: adapter structure pointer 2629 * @update_kcqe: kcqe pointer 2630 * 2631 * function callback exported via bnx2i - cnic driver interface to 2632 * indicate async TCP events (RST) sent by the peer. 2633 */ 2634static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2635{ 2636 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2637 u32 old_state = ep->state; 2638 2639 ep->state = EP_STATE_TCP_RST_RCVD; 2640 if (old_state == EP_STATE_DISCONN_START) 2641 wake_up_interruptible(&ep->ofld_wait); 2642 else 2643 if (ep->conn) 2644 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2645} 2646 2647 2648static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2649 char *buf, u16 buflen) 2650{ 2651 struct bnx2i_hba *hba = context; 2652 int rc; 2653 2654 if (!hba) 2655 return -ENODEV; 2656 2657 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2658 msg_type, buf, buflen); 2659 if (rc) 2660 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2661 2662 return rc; 2663} 2664 2665 2666/** 2667 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2668 * carrying callback function pointers 2669 * 2670 */ 2671struct cnic_ulp_ops bnx2i_cnic_cb = { 2672 .cnic_init = bnx2i_ulp_init, 2673 .cnic_exit = bnx2i_ulp_exit, 2674 .cnic_start = bnx2i_start, 2675 .cnic_stop = bnx2i_stop, 2676 .indicate_kcqes = bnx2i_indicate_kcqe, 2677 .indicate_netevent = bnx2i_indicate_netevent, 2678 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2679 .cm_close_complete = bnx2i_cm_close_cmpl, 2680 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2681 .cm_remote_close = bnx2i_cm_remote_close, 2682 .cm_remote_abort = bnx2i_cm_remote_abort, 2683 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2684 .owner = THIS_MODULE 2685}; 2686 2687 2688/** 2689 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2690 * @ep: bnx2i endpoint 2691 * 2692 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2693 * register in BAR #0. Whereas in 57710 these register are accessed by 2694 * mapping BAR #1 2695 */ 2696int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2697{ 2698 u32 cid_num; 2699 u32 reg_off; 2700 u32 first_l4l5; 2701 u32 ctx_sz; 2702 u32 config2; 2703 resource_size_t reg_base; 2704 2705 cid_num = bnx2i_get_cid_num(ep); 2706 2707 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2708 reg_base = pci_resource_start(ep->hba->pcidev, 2709 BNX2X_DOORBELL_PCI_BAR); 2710 reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) + 2711 DPM_TRIGER_TYPE; 2712 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4); 2713 goto arm_cq; 2714 } 2715 2716 reg_base = ep->hba->netdev->base_addr; 2717 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && 2718 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { 2719 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); 2720 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; 2721 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; 2722 if (ctx_sz) 2723 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE 2724 + BNX2I_570X_PAGE_SIZE_DEFAULT * 2725 (((cid_num - first_l4l5) / ctx_sz) + 256); 2726 else 2727 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2728 } else 2729 /* 5709 device in normal node and 5706/5708 devices */ 2730 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2731 2732 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 2733 MB_KERNEL_CTX_SIZE); 2734 if (!ep->qp.ctx_base) 2735 return -ENOMEM; 2736 2737arm_cq: 2738 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); 2739 return 0; 2740} 2741