1 /* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2013 Broadcom Corporation 4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. 5 * Copyright (c) 2007, 2008 Mike Christie 6 * Copyright (c) 2014, QLogic Corporation 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation. 11 * 12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) 13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com) 14 * Maintained by: QLogic-Storage-Upstream@qlogic.com 15 */ 16 17 #include <linux/gfp.h> 18 #include <scsi/scsi_tcq.h> 19 #include <scsi/libiscsi.h> 20 #include "bnx2i.h" 21 22 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); 23 24 /** 25 * bnx2i_get_cid_num - get cid from ep 26 * @ep: endpoint pointer 27 * 28 * Only applicable to 57710 family of devices 29 */ 30 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep) 31 { 32 u32 cid; 33 34 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 35 cid = ep->ep_cid; 36 else 37 cid = GET_CID_NUM(ep->ep_cid); 38 return cid; 39 } 40 41 42 /** 43 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type 44 * @hba: Adapter for which adjustments is to be made 45 * 46 * Only applicable to 57710 family of devices 47 */ 48 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba) 49 { 50 u32 num_elements_per_pg; 51 52 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) || 53 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) || 54 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 55 if (!is_power_of_2(hba->max_sqes)) 56 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes); 57 58 if (!is_power_of_2(hba->max_rqes)) 59 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes); 60 } 61 62 /* Adjust each queue size if the user selection does not 63 * yield integral num of page buffers 64 */ 65 /* adjust SQ */ 66 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 67 if (hba->max_sqes < num_elements_per_pg) 68 hba->max_sqes = num_elements_per_pg; 69 else if (hba->max_sqes % num_elements_per_pg) 70 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) & 71 ~(num_elements_per_pg - 1); 72 73 /* adjust CQ */ 74 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE; 75 if (hba->max_cqes < num_elements_per_pg) 76 hba->max_cqes = num_elements_per_pg; 77 else if (hba->max_cqes % num_elements_per_pg) 78 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) & 79 ~(num_elements_per_pg - 1); 80 81 /* adjust RQ */ 82 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE; 83 if (hba->max_rqes < num_elements_per_pg) 84 hba->max_rqes = num_elements_per_pg; 85 else if (hba->max_rqes % num_elements_per_pg) 86 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) & 87 ~(num_elements_per_pg - 1); 88 } 89 90 91 /** 92 * bnx2i_get_link_state - get network interface link state 93 * @hba: adapter instance pointer 94 * 95 * updates adapter structure flag based on netdev state 96 */ 97 static void bnx2i_get_link_state(struct bnx2i_hba *hba) 98 { 99 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state)) 100 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 101 else 102 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 103 } 104 105 106 /** 107 * bnx2i_iscsi_license_error - displays iscsi license related error message 108 * @hba: adapter instance pointer 109 * @error_code: error classification 110 * 111 * Puts out an error log when driver is unable to offload iscsi connection 112 * due to license restrictions 113 */ 114 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code) 115 { 116 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED) 117 /* iSCSI offload not supported on this device */ 118 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n", 119 hba->netdev->name); 120 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED) 121 /* iSCSI offload not supported on this LOM device */ 122 printk(KERN_ERR "bnx2i: LOM is not enable to " 123 "offload iSCSI connections, dev=%s\n", 124 hba->netdev->name); 125 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state); 126 } 127 128 129 /** 130 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification 131 * @ep: endpoint (transport identifier) structure 132 * @action: action, ARM or DISARM. For now only ARM_CQE is used 133 * 134 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt 135 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is 136 * outstanding and on chip timer expires 137 */ 138 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action) 139 { 140 struct bnx2i_5771x_cq_db *cq_db; 141 u16 cq_index; 142 u16 next_index = 0; 143 u32 num_active_cmds; 144 145 /* Coalesce CQ entries only on 10G devices */ 146 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 147 return 0; 148 149 /* Do not update CQ DB multiple times before firmware writes 150 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious 151 * interrupts and other unwanted results 152 */ 153 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 154 155 if (action != CNIC_ARM_CQE_FP) 156 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF) 157 return 0; 158 159 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) { 160 num_active_cmds = atomic_read(&ep->num_active_cmds); 161 if (num_active_cmds <= event_coal_min) 162 next_index = 1; 163 else { 164 next_index = num_active_cmds >> ep->ec_shift; 165 if (next_index > num_active_cmds - event_coal_min) 166 next_index = num_active_cmds - event_coal_min; 167 } 168 if (!next_index) 169 next_index = 1; 170 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1; 171 if (cq_index > ep->qp.cqe_size * 2) 172 cq_index -= ep->qp.cqe_size * 2; 173 if (!cq_index) 174 cq_index = 1; 175 176 cq_db->sqn[0] = cq_index; 177 } 178 return next_index; 179 } 180 181 182 /** 183 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer 184 * @conn: iscsi connection on which RQ event occurred 185 * @ptr: driver buffer to which RQ buffer contents is to 186 * be copied 187 * @len: length of valid data inside RQ buf 188 * 189 * Copies RQ buffer contents from shared (DMA'able) memory region to 190 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and 191 * scsi sense info 192 */ 193 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len) 194 { 195 if (!bnx2i_conn->ep->qp.rqe_left) 196 return; 197 198 bnx2i_conn->ep->qp.rqe_left--; 199 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len); 200 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) { 201 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe; 202 bnx2i_conn->ep->qp.rq_cons_idx = 0; 203 } else { 204 bnx2i_conn->ep->qp.rq_cons_qe++; 205 bnx2i_conn->ep->qp.rq_cons_idx++; 206 } 207 } 208 209 210 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) 211 { 212 struct bnx2i_5771x_dbell dbell; 213 u32 msg; 214 215 memset(&dbell, 0, sizeof(dbell)); 216 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << 217 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); 218 msg = *((u32 *)&dbell); 219 /* TODO : get doorbell register mapping */ 220 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); 221 } 222 223 224 /** 225 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell 226 * @conn: iscsi connection on which event to post 227 * @count: number of RQ buffer being posted to chip 228 * 229 * No need to ring hardware doorbell for 57710 family of devices 230 */ 231 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count) 232 { 233 struct bnx2i_5771x_sq_rq_db *rq_db; 234 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000); 235 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 236 237 ep->qp.rqe_left += count; 238 ep->qp.rq_prod_idx &= 0x7FFF; 239 ep->qp.rq_prod_idx += count; 240 241 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) { 242 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes; 243 if (!hi_bit) 244 ep->qp.rq_prod_idx |= 0x8000; 245 } else 246 ep->qp.rq_prod_idx |= hi_bit; 247 248 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 249 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt; 250 rq_db->prod_idx = ep->qp.rq_prod_idx; 251 /* no need to ring hardware doorbell for 57710 */ 252 } else { 253 writew(ep->qp.rq_prod_idx, 254 ep->qp.ctx_base + CNIC_RECV_DOORBELL); 255 } 256 mmiowb(); 257 } 258 259 260 /** 261 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine 262 * @conn: iscsi connection to which new SQ entries belong 263 * @count: number of SQ WQEs to post 264 * 265 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family 266 * of devices. For 5706/5708/5709 new SQ WQE count is written into the 267 * doorbell register 268 */ 269 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) 270 { 271 struct bnx2i_5771x_sq_rq_db *sq_db; 272 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 273 274 atomic_inc(&ep->num_active_cmds); 275 wmb(); /* flush SQ WQE memory before the doorbell is rung */ 276 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 277 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; 278 sq_db->prod_idx = ep->qp.sq_prod_idx; 279 bnx2i_ring_577xx_doorbell(bnx2i_conn); 280 } else 281 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); 282 283 mmiowb(); /* flush posted PCI writes */ 284 } 285 286 287 /** 288 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters 289 * @conn: iscsi connection to which new SQ entries belong 290 * @count: number of SQ WQEs to post 291 * 292 * this routine will update SQ driver parameters and ring the doorbell 293 */ 294 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, 295 int count) 296 { 297 int tmp_cnt; 298 299 if (count == 1) { 300 if (bnx2i_conn->ep->qp.sq_prod_qe == 301 bnx2i_conn->ep->qp.sq_last_qe) 302 bnx2i_conn->ep->qp.sq_prod_qe = 303 bnx2i_conn->ep->qp.sq_first_qe; 304 else 305 bnx2i_conn->ep->qp.sq_prod_qe++; 306 } else { 307 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= 308 bnx2i_conn->ep->qp.sq_last_qe) 309 bnx2i_conn->ep->qp.sq_prod_qe += count; 310 else { 311 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - 312 bnx2i_conn->ep->qp.sq_prod_qe; 313 bnx2i_conn->ep->qp.sq_prod_qe = 314 &bnx2i_conn->ep->qp.sq_first_qe[count - 315 (tmp_cnt + 1)]; 316 } 317 } 318 bnx2i_conn->ep->qp.sq_prod_idx += count; 319 /* Ring the doorbell */ 320 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); 321 } 322 323 324 /** 325 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware 326 * @conn: iscsi connection 327 * @cmd: driver command structure which is requesting 328 * a WQE to sent to chip for further processing 329 * 330 * prepare and post an iSCSI Login request WQE to CNIC firmware 331 */ 332 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, 333 struct iscsi_task *task) 334 { 335 struct bnx2i_cmd *bnx2i_cmd; 336 struct bnx2i_login_request *login_wqe; 337 struct iscsi_login_req *login_hdr; 338 u32 dword; 339 340 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 341 login_hdr = (struct iscsi_login_req *)task->hdr; 342 login_wqe = (struct bnx2i_login_request *) 343 bnx2i_conn->ep->qp.sq_prod_qe; 344 345 login_wqe->op_code = login_hdr->opcode; 346 login_wqe->op_attr = login_hdr->flags; 347 login_wqe->version_max = login_hdr->max_version; 348 login_wqe->version_min = login_hdr->min_version; 349 login_wqe->data_length = ntoh24(login_hdr->dlength); 350 login_wqe->isid_lo = *((u32 *) login_hdr->isid); 351 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2); 352 login_wqe->tsih = login_hdr->tsih; 353 login_wqe->itt = task->itt | 354 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT); 355 login_wqe->cid = login_hdr->cid; 356 357 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn); 358 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); 359 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN; 360 361 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 362 login_wqe->resp_bd_list_addr_hi = 363 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 364 365 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) | 366 (bnx2i_conn->gen_pdu.resp_buf_size << 367 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 368 login_wqe->resp_buffer = dword; 369 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 370 login_wqe->bd_list_addr_hi = 371 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 372 login_wqe->num_bds = 1; 373 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 374 375 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 376 return 0; 377 } 378 379 /** 380 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware 381 * @conn: iscsi connection 382 * @mtask: driver command structure which is requesting 383 * a WQE to sent to chip for further processing 384 * 385 * prepare and post an iSCSI Login request WQE to CNIC firmware 386 */ 387 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn, 388 struct iscsi_task *mtask) 389 { 390 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 391 struct iscsi_tm *tmfabort_hdr; 392 struct scsi_cmnd *ref_sc; 393 struct iscsi_task *ctask; 394 struct bnx2i_cmd *bnx2i_cmd; 395 struct bnx2i_tmf_request *tmfabort_wqe; 396 u32 dword; 397 u32 scsi_lun[2]; 398 399 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 400 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; 401 tmfabort_wqe = (struct bnx2i_tmf_request *) 402 bnx2i_conn->ep->qp.sq_prod_qe; 403 404 tmfabort_wqe->op_code = tmfabort_hdr->opcode; 405 tmfabort_wqe->op_attr = tmfabort_hdr->flags; 406 407 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); 408 tmfabort_wqe->reserved2 = 0; 409 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); 410 411 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { 412 case ISCSI_TM_FUNC_ABORT_TASK: 413 case ISCSI_TM_FUNC_TASK_REASSIGN: 414 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); 415 if (!ctask || !ctask->sc) 416 /* 417 * the iscsi layer must have completed the cmd while 418 * was starting up. 419 * 420 * Note: In the case of a SCSI cmd timeout, the task's 421 * sc is still active; hence ctask->sc != 0 422 * In this case, the task must be aborted 423 */ 424 return 0; 425 426 ref_sc = ctask->sc; 427 if (ref_sc->sc_data_direction == DMA_TO_DEVICE) 428 dword = (ISCSI_TASK_TYPE_WRITE << 429 ISCSI_CMD_REQUEST_TYPE_SHIFT); 430 else 431 dword = (ISCSI_TASK_TYPE_READ << 432 ISCSI_CMD_REQUEST_TYPE_SHIFT); 433 tmfabort_wqe->ref_itt = (dword | 434 (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); 435 break; 436 default: 437 tmfabort_wqe->ref_itt = RESERVED_ITT; 438 } 439 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun)); 440 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); 441 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); 442 443 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); 444 445 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 446 tmfabort_wqe->bd_list_addr_hi = (u32) 447 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 448 tmfabort_wqe->num_bds = 1; 449 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 450 451 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 452 return 0; 453 } 454 455 /** 456 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware 457 * @conn: iscsi connection 458 * @mtask: driver command structure which is requesting 459 * a WQE to sent to chip for further processing 460 * 461 * prepare and post an iSCSI Text request WQE to CNIC firmware 462 */ 463 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn, 464 struct iscsi_task *mtask) 465 { 466 struct bnx2i_cmd *bnx2i_cmd; 467 struct bnx2i_text_request *text_wqe; 468 struct iscsi_text *text_hdr; 469 u32 dword; 470 471 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 472 text_hdr = (struct iscsi_text *)mtask->hdr; 473 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe; 474 475 memset(text_wqe, 0, sizeof(struct bnx2i_text_request)); 476 477 text_wqe->op_code = text_hdr->opcode; 478 text_wqe->op_attr = text_hdr->flags; 479 text_wqe->data_length = ntoh24(text_hdr->dlength); 480 text_wqe->itt = mtask->itt | 481 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT); 482 text_wqe->ttt = be32_to_cpu(text_hdr->ttt); 483 484 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn); 485 486 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 487 text_wqe->resp_bd_list_addr_hi = 488 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 489 490 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) | 491 (bnx2i_conn->gen_pdu.resp_buf_size << 492 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 493 text_wqe->resp_buffer = dword; 494 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 495 text_wqe->bd_list_addr_hi = 496 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 497 text_wqe->num_bds = 1; 498 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 499 500 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 501 return 0; 502 } 503 504 505 /** 506 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware 507 * @conn: iscsi connection 508 * @cmd: driver command structure which is requesting 509 * a WQE to sent to chip for further processing 510 * 511 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware 512 */ 513 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, 514 struct bnx2i_cmd *cmd) 515 { 516 struct bnx2i_cmd_request *scsi_cmd_wqe; 517 518 scsi_cmd_wqe = (struct bnx2i_cmd_request *) 519 bnx2i_conn->ep->qp.sq_prod_qe; 520 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); 521 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 522 523 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 524 return 0; 525 } 526 527 /** 528 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware 529 * @conn: iscsi connection 530 * @cmd: driver command structure which is requesting 531 * a WQE to sent to chip for further processing 532 * @datap: payload buffer pointer 533 * @data_len: payload data length 534 * @unsol: indicated whether nopout pdu is unsolicited pdu or 535 * in response to target's NOPIN w/ TTT != FFFFFFFF 536 * 537 * prepare and post a nopout request WQE to CNIC firmware 538 */ 539 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, 540 struct iscsi_task *task, 541 char *datap, int data_len, int unsol) 542 { 543 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 544 struct bnx2i_cmd *bnx2i_cmd; 545 struct bnx2i_nop_out_request *nopout_wqe; 546 struct iscsi_nopout *nopout_hdr; 547 548 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 549 nopout_hdr = (struct iscsi_nopout *)task->hdr; 550 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; 551 552 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request)); 553 554 nopout_wqe->op_code = nopout_hdr->opcode; 555 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; 556 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8); 557 558 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 559 u32 tmp = nopout_wqe->lun[0]; 560 /* 57710 requires LUN field to be swapped */ 561 nopout_wqe->lun[0] = nopout_wqe->lun[1]; 562 nopout_wqe->lun[1] = tmp; 563 } 564 565 nopout_wqe->itt = ((u16)task->itt | 566 (ISCSI_TASK_TYPE_MPATH << 567 ISCSI_TMF_REQUEST_TYPE_SHIFT)); 568 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt); 569 nopout_wqe->flags = 0; 570 if (!unsol) 571 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 572 else if (nopout_hdr->itt == RESERVED_ITT) 573 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 574 575 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 576 nopout_wqe->data_length = data_len; 577 if (data_len) { 578 /* handle payload data, not required in first release */ 579 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); 580 } else { 581 nopout_wqe->bd_list_addr_lo = (u32) 582 bnx2i_conn->hba->mp_bd_dma; 583 nopout_wqe->bd_list_addr_hi = 584 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 585 nopout_wqe->num_bds = 1; 586 } 587 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 588 589 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 590 return 0; 591 } 592 593 594 /** 595 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware 596 * @conn: iscsi connection 597 * @cmd: driver command structure which is requesting 598 * a WQE to sent to chip for further processing 599 * 600 * prepare and post logout request WQE to CNIC firmware 601 */ 602 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, 603 struct iscsi_task *task) 604 { 605 struct bnx2i_cmd *bnx2i_cmd; 606 struct bnx2i_logout_request *logout_wqe; 607 struct iscsi_logout *logout_hdr; 608 609 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 610 logout_hdr = (struct iscsi_logout *)task->hdr; 611 612 logout_wqe = (struct bnx2i_logout_request *) 613 bnx2i_conn->ep->qp.sq_prod_qe; 614 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); 615 616 logout_wqe->op_code = logout_hdr->opcode; 617 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 618 logout_wqe->op_attr = 619 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; 620 logout_wqe->itt = ((u16)task->itt | 621 (ISCSI_TASK_TYPE_MPATH << 622 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); 623 logout_wqe->data_length = 0; 624 logout_wqe->cid = 0; 625 626 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 627 logout_wqe->bd_list_addr_hi = (u32) 628 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 629 logout_wqe->num_bds = 1; 630 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 631 632 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; 633 634 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 635 return 0; 636 } 637 638 639 /** 640 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware 641 * @conn: iscsi connection which requires iscsi parameter update 642 * 643 * sends down iSCSI Conn Update request to move iSCSI conn to FFP 644 */ 645 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) 646 { 647 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 648 struct bnx2i_hba *hba = bnx2i_conn->hba; 649 struct kwqe *kwqe_arr[2]; 650 struct iscsi_kwqe_conn_update *update_wqe; 651 struct iscsi_kwqe_conn_update conn_update_kwqe; 652 653 update_wqe = &conn_update_kwqe; 654 655 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; 656 update_wqe->hdr.flags = 657 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 658 659 /* 5771x requires conn context id to be passed as is */ 660 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) 661 update_wqe->context_id = bnx2i_conn->ep->ep_cid; 662 else 663 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); 664 update_wqe->conn_flags = 0; 665 if (conn->hdrdgst_en) 666 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; 667 if (conn->datadgst_en) 668 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; 669 if (conn->session->initial_r2t_en) 670 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; 671 if (conn->session->imm_data_en) 672 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; 673 674 update_wqe->max_send_pdu_length = conn->max_xmit_dlength; 675 update_wqe->max_recv_pdu_length = conn->max_recv_dlength; 676 update_wqe->first_burst_length = conn->session->first_burst; 677 update_wqe->max_burst_length = conn->session->max_burst; 678 update_wqe->exp_stat_sn = conn->exp_statsn; 679 update_wqe->max_outstanding_r2ts = conn->session->max_r2t; 680 update_wqe->session_error_recovery_level = conn->session->erl; 681 iscsi_conn_printk(KERN_ALERT, conn, 682 "bnx2i: conn update - MBL 0x%x FBL 0x%x" 683 "MRDSL_I 0x%x MRDSL_T 0x%x \n", 684 update_wqe->max_burst_length, 685 update_wqe->first_burst_length, 686 update_wqe->max_recv_pdu_length, 687 update_wqe->max_send_pdu_length); 688 689 kwqe_arr[0] = (struct kwqe *) update_wqe; 690 if (hba->cnic && hba->cnic->submit_kwqes) 691 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 692 } 693 694 695 /** 696 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware 697 * @data: endpoint (transport handle) structure pointer 698 * 699 * routine to handle connection offload/destroy request timeout 700 */ 701 void bnx2i_ep_ofld_timer(unsigned long data) 702 { 703 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data; 704 705 if (ep->state == EP_STATE_OFLD_START) { 706 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); 707 ep->state = EP_STATE_OFLD_FAILED; 708 } else if (ep->state == EP_STATE_DISCONN_START) { 709 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); 710 ep->state = EP_STATE_DISCONN_TIMEDOUT; 711 } else if (ep->state == EP_STATE_CLEANUP_START) { 712 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); 713 ep->state = EP_STATE_CLEANUP_FAILED; 714 } 715 716 wake_up_interruptible(&ep->ofld_wait); 717 } 718 719 720 static int bnx2i_power_of2(u32 val) 721 { 722 u32 power = 0; 723 if (val & (val - 1)) 724 return power; 725 val--; 726 while (val) { 727 val = val >> 1; 728 power++; 729 } 730 return power; 731 } 732 733 734 /** 735 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request 736 * @hba: adapter structure pointer 737 * @cmd: driver command structure which is requesting 738 * a WQE to sent to chip for further processing 739 * 740 * prepares and posts CONN_OFLD_REQ1/2 KWQE 741 */ 742 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 743 { 744 struct bnx2i_cleanup_request *cmd_cleanup; 745 746 cmd_cleanup = 747 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; 748 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); 749 750 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; 751 cmd_cleanup->itt = cmd->req.itt; 752 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ 753 754 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); 755 } 756 757 758 /** 759 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process 760 * @hba: adapter structure pointer 761 * @ep: endpoint (transport identifier) structure 762 * 763 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate 764 * iscsi connection context clean-up process 765 */ 766 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 767 { 768 struct kwqe *kwqe_arr[2]; 769 struct iscsi_kwqe_conn_destroy conn_cleanup; 770 int rc = -EINVAL; 771 772 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); 773 774 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; 775 conn_cleanup.hdr.flags = 776 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 777 /* 5771x requires conn context id to be passed as is */ 778 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 779 conn_cleanup.context_id = ep->ep_cid; 780 else 781 conn_cleanup.context_id = (ep->ep_cid >> 7); 782 783 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; 784 785 kwqe_arr[0] = (struct kwqe *) &conn_cleanup; 786 if (hba->cnic && hba->cnic->submit_kwqes) 787 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 788 789 return rc; 790 } 791 792 793 /** 794 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process 795 * @hba: adapter structure pointer 796 * @ep: endpoint (transport identifier) structure 797 * 798 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 799 */ 800 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, 801 struct bnx2i_endpoint *ep) 802 { 803 struct kwqe *kwqe_arr[2]; 804 struct iscsi_kwqe_conn_offload1 ofld_req1; 805 struct iscsi_kwqe_conn_offload2 ofld_req2; 806 dma_addr_t dma_addr; 807 int num_kwqes = 2; 808 u32 *ptbl; 809 int rc = -EINVAL; 810 811 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 812 ofld_req1.hdr.flags = 813 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 814 815 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 816 817 dma_addr = ep->qp.sq_pgtbl_phys; 818 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 819 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 820 821 dma_addr = ep->qp.cq_pgtbl_phys; 822 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 823 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 824 825 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 826 ofld_req2.hdr.flags = 827 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 828 829 dma_addr = ep->qp.rq_pgtbl_phys; 830 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 831 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 832 833 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 834 835 ofld_req2.sq_first_pte.hi = *ptbl++; 836 ofld_req2.sq_first_pte.lo = *ptbl; 837 838 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 839 ofld_req2.cq_first_pte.hi = *ptbl++; 840 ofld_req2.cq_first_pte.lo = *ptbl; 841 842 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 843 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 844 ofld_req2.num_additional_wqes = 0; 845 846 if (hba->cnic && hba->cnic->submit_kwqes) 847 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 848 849 return rc; 850 } 851 852 853 /** 854 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation 855 * @hba: adapter structure pointer 856 * @ep: endpoint (transport identifier) structure 857 * 858 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 859 */ 860 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, 861 struct bnx2i_endpoint *ep) 862 { 863 struct kwqe *kwqe_arr[5]; 864 struct iscsi_kwqe_conn_offload1 ofld_req1; 865 struct iscsi_kwqe_conn_offload2 ofld_req2; 866 struct iscsi_kwqe_conn_offload3 ofld_req3[1]; 867 dma_addr_t dma_addr; 868 int num_kwqes = 2; 869 u32 *ptbl; 870 int rc = -EINVAL; 871 872 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 873 ofld_req1.hdr.flags = 874 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 875 876 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 877 878 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; 879 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 880 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 881 882 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; 883 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 884 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 885 886 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 887 ofld_req2.hdr.flags = 888 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 889 890 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; 891 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 892 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 893 894 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 895 ofld_req2.sq_first_pte.hi = *ptbl++; 896 ofld_req2.sq_first_pte.lo = *ptbl; 897 898 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 899 ofld_req2.cq_first_pte.hi = *ptbl++; 900 ofld_req2.cq_first_pte.lo = *ptbl; 901 902 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 903 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 904 905 ofld_req2.num_additional_wqes = 1; 906 memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); 907 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 908 ofld_req3[0].qp_first_pte[0].hi = *ptbl++; 909 ofld_req3[0].qp_first_pte[0].lo = *ptbl; 910 911 kwqe_arr[2] = (struct kwqe *) ofld_req3; 912 /* need if we decide to go with multiple KCQE's per conn */ 913 num_kwqes += 1; 914 915 if (hba->cnic && hba->cnic->submit_kwqes) 916 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 917 918 return rc; 919 } 920 921 /** 922 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process 923 * 924 * @hba: adapter structure pointer 925 * @ep: endpoint (transport identifier) structure 926 * 927 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE 928 */ 929 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 930 { 931 int rc; 932 933 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 934 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); 935 else 936 rc = bnx2i_570x_send_conn_ofld_req(hba, ep); 937 938 return rc; 939 } 940 941 942 /** 943 * setup_qp_page_tables - iscsi QP page table setup function 944 * @ep: endpoint (transport identifier) structure 945 * 946 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires 947 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires 948 * PT in little endian format 949 */ 950 static void setup_qp_page_tables(struct bnx2i_endpoint *ep) 951 { 952 int num_pages; 953 u32 *ptbl; 954 dma_addr_t page; 955 int cnic_dev_10g; 956 957 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 958 cnic_dev_10g = 1; 959 else 960 cnic_dev_10g = 0; 961 962 /* SQ page table */ 963 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); 964 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE; 965 page = ep->qp.sq_phys; 966 967 if (cnic_dev_10g) 968 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 969 else 970 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 971 while (num_pages--) { 972 if (cnic_dev_10g) { 973 /* PTE is written in little endian format for 57710 */ 974 *ptbl = (u32) page; 975 ptbl++; 976 *ptbl = (u32) ((u64) page >> 32); 977 ptbl++; 978 page += CNIC_PAGE_SIZE; 979 } else { 980 /* PTE is written in big endian format for 981 * 5706/5708/5709 devices */ 982 *ptbl = (u32) ((u64) page >> 32); 983 ptbl++; 984 *ptbl = (u32) page; 985 ptbl++; 986 page += CNIC_PAGE_SIZE; 987 } 988 } 989 990 /* RQ page table */ 991 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); 992 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE; 993 page = ep->qp.rq_phys; 994 995 if (cnic_dev_10g) 996 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 997 else 998 ptbl = (u32 *) ep->qp.rq_pgtbl_virt; 999 while (num_pages--) { 1000 if (cnic_dev_10g) { 1001 /* PTE is written in little endian format for 57710 */ 1002 *ptbl = (u32) page; 1003 ptbl++; 1004 *ptbl = (u32) ((u64) page >> 32); 1005 ptbl++; 1006 page += CNIC_PAGE_SIZE; 1007 } else { 1008 /* PTE is written in big endian format for 1009 * 5706/5708/5709 devices */ 1010 *ptbl = (u32) ((u64) page >> 32); 1011 ptbl++; 1012 *ptbl = (u32) page; 1013 ptbl++; 1014 page += CNIC_PAGE_SIZE; 1015 } 1016 } 1017 1018 /* CQ page table */ 1019 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); 1020 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE; 1021 page = ep->qp.cq_phys; 1022 1023 if (cnic_dev_10g) 1024 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 1025 else 1026 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 1027 while (num_pages--) { 1028 if (cnic_dev_10g) { 1029 /* PTE is written in little endian format for 57710 */ 1030 *ptbl = (u32) page; 1031 ptbl++; 1032 *ptbl = (u32) ((u64) page >> 32); 1033 ptbl++; 1034 page += CNIC_PAGE_SIZE; 1035 } else { 1036 /* PTE is written in big endian format for 1037 * 5706/5708/5709 devices */ 1038 *ptbl = (u32) ((u64) page >> 32); 1039 ptbl++; 1040 *ptbl = (u32) page; 1041 ptbl++; 1042 page += CNIC_PAGE_SIZE; 1043 } 1044 } 1045 } 1046 1047 1048 /** 1049 * bnx2i_alloc_qp_resc - allocates required resources for QP. 1050 * @hba: adapter structure pointer 1051 * @ep: endpoint (transport identifier) structure 1052 * 1053 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able 1054 * memory for SQ/RQ/CQ and page tables. EP structure elements such 1055 * as producer/consumer indexes/pointers, queue sizes and page table 1056 * contents are setup 1057 */ 1058 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1059 { 1060 struct bnx2i_5771x_cq_db *cq_db; 1061 1062 ep->hba = hba; 1063 ep->conn = NULL; 1064 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; 1065 1066 /* Allocate page table memory for SQ which is page aligned */ 1067 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; 1068 ep->qp.sq_mem_size = 1069 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1070 ep->qp.sq_pgtbl_size = 1071 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1072 ep->qp.sq_pgtbl_size = 1073 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1074 1075 ep->qp.sq_pgtbl_virt = 1076 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1077 &ep->qp.sq_pgtbl_phys, GFP_KERNEL); 1078 if (!ep->qp.sq_pgtbl_virt) { 1079 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", 1080 ep->qp.sq_pgtbl_size); 1081 goto mem_alloc_err; 1082 } 1083 1084 /* Allocate memory area for actual SQ element */ 1085 ep->qp.sq_virt = 1086 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1087 &ep->qp.sq_phys, GFP_KERNEL); 1088 if (!ep->qp.sq_virt) { 1089 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", 1090 ep->qp.sq_mem_size); 1091 goto mem_alloc_err; 1092 } 1093 1094 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size); 1095 ep->qp.sq_first_qe = ep->qp.sq_virt; 1096 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1097 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1098 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1099 ep->qp.sq_prod_idx = 0; 1100 ep->qp.sq_cons_idx = 0; 1101 ep->qp.sqe_left = hba->max_sqes; 1102 1103 /* Allocate page table memory for CQ which is page aligned */ 1104 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1105 ep->qp.cq_mem_size = 1106 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1107 ep->qp.cq_pgtbl_size = 1108 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1109 ep->qp.cq_pgtbl_size = 1110 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1111 1112 ep->qp.cq_pgtbl_virt = 1113 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1114 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1115 if (!ep->qp.cq_pgtbl_virt) { 1116 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1117 ep->qp.cq_pgtbl_size); 1118 goto mem_alloc_err; 1119 } 1120 1121 /* Allocate memory area for actual CQ element */ 1122 ep->qp.cq_virt = 1123 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1124 &ep->qp.cq_phys, GFP_KERNEL); 1125 if (!ep->qp.cq_virt) { 1126 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1127 ep->qp.cq_mem_size); 1128 goto mem_alloc_err; 1129 } 1130 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size); 1131 1132 ep->qp.cq_first_qe = ep->qp.cq_virt; 1133 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1134 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1135 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1136 ep->qp.cq_prod_idx = 0; 1137 ep->qp.cq_cons_idx = 0; 1138 ep->qp.cqe_left = hba->max_cqes; 1139 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1140 ep->qp.cqe_size = hba->max_cqes; 1141 1142 /* Invalidate all EQ CQE index, req only for 57710 */ 1143 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1144 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1145 1146 /* Allocate page table memory for RQ which is page aligned */ 1147 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1148 ep->qp.rq_mem_size = 1149 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1150 ep->qp.rq_pgtbl_size = 1151 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1152 ep->qp.rq_pgtbl_size = 1153 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1154 1155 ep->qp.rq_pgtbl_virt = 1156 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1157 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1158 if (!ep->qp.rq_pgtbl_virt) { 1159 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1160 ep->qp.rq_pgtbl_size); 1161 goto mem_alloc_err; 1162 } 1163 1164 /* Allocate memory area for actual RQ element */ 1165 ep->qp.rq_virt = 1166 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1167 &ep->qp.rq_phys, GFP_KERNEL); 1168 if (!ep->qp.rq_virt) { 1169 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1170 ep->qp.rq_mem_size); 1171 goto mem_alloc_err; 1172 } 1173 1174 ep->qp.rq_first_qe = ep->qp.rq_virt; 1175 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1176 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1177 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1178 ep->qp.rq_prod_idx = 0x8000; 1179 ep->qp.rq_cons_idx = 0; 1180 ep->qp.rqe_left = hba->max_rqes; 1181 1182 setup_qp_page_tables(ep); 1183 1184 return 0; 1185 1186 mem_alloc_err: 1187 bnx2i_free_qp_resc(hba, ep); 1188 return -ENOMEM; 1189 } 1190 1191 1192 1193 /** 1194 * bnx2i_free_qp_resc - free memory resources held by QP 1195 * @hba: adapter structure pointer 1196 * @ep: endpoint (transport identifier) structure 1197 * 1198 * Free QP resources - SQ/RQ/CQ memory and page tables. 1199 */ 1200 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1201 { 1202 if (ep->qp.ctx_base) { 1203 iounmap(ep->qp.ctx_base); 1204 ep->qp.ctx_base = NULL; 1205 } 1206 /* Free SQ mem */ 1207 if (ep->qp.sq_pgtbl_virt) { 1208 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1209 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1210 ep->qp.sq_pgtbl_virt = NULL; 1211 ep->qp.sq_pgtbl_phys = 0; 1212 } 1213 if (ep->qp.sq_virt) { 1214 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1215 ep->qp.sq_virt, ep->qp.sq_phys); 1216 ep->qp.sq_virt = NULL; 1217 ep->qp.sq_phys = 0; 1218 } 1219 1220 /* Free RQ mem */ 1221 if (ep->qp.rq_pgtbl_virt) { 1222 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1223 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1224 ep->qp.rq_pgtbl_virt = NULL; 1225 ep->qp.rq_pgtbl_phys = 0; 1226 } 1227 if (ep->qp.rq_virt) { 1228 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1229 ep->qp.rq_virt, ep->qp.rq_phys); 1230 ep->qp.rq_virt = NULL; 1231 ep->qp.rq_phys = 0; 1232 } 1233 1234 /* Free CQ mem */ 1235 if (ep->qp.cq_pgtbl_virt) { 1236 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1237 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1238 ep->qp.cq_pgtbl_virt = NULL; 1239 ep->qp.cq_pgtbl_phys = 0; 1240 } 1241 if (ep->qp.cq_virt) { 1242 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1243 ep->qp.cq_virt, ep->qp.cq_phys); 1244 ep->qp.cq_virt = NULL; 1245 ep->qp.cq_phys = 0; 1246 } 1247 } 1248 1249 1250 /** 1251 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1252 * @hba: adapter structure pointer 1253 * 1254 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1255 * This results in iSCSi support validation and on-chip context manager 1256 * initialization. Firmware completes this handshake with a CQE carrying 1257 * the result of iscsi support validation. Parameter carried by 1258 * iscsi init request determines the number of offloaded connection and 1259 * tolerance level for iscsi protocol violation this hba/chip can support 1260 */ 1261 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1262 { 1263 struct kwqe *kwqe_arr[3]; 1264 struct iscsi_kwqe_init1 iscsi_init; 1265 struct iscsi_kwqe_init2 iscsi_init2; 1266 int rc = 0; 1267 u64 mask64; 1268 1269 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1)); 1270 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2)); 1271 1272 bnx2i_adjust_qp_size(hba); 1273 1274 iscsi_init.flags = 1275 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1276 if (en_tcp_dack) 1277 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1278 iscsi_init.reserved0 = 0; 1279 iscsi_init.num_cqs = 1; 1280 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1281 iscsi_init.hdr.flags = 1282 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1283 1284 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1285 iscsi_init.dummy_buffer_addr_hi = 1286 (u32) ((u64) hba->dummy_buf_dma >> 32); 1287 1288 hba->num_ccell = hba->max_sqes >> 1; 1289 hba->ctx_ccell_tasks = 1290 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1291 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1292 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1293 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1294 iscsi_init.sq_num_wqes = hba->max_sqes; 1295 iscsi_init.cq_log_wqes_per_page = 1296 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE); 1297 iscsi_init.cq_num_wqes = hba->max_cqes; 1298 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1299 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1300 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1301 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1302 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1303 iscsi_init.rq_num_wqes = hba->max_rqes; 1304 1305 1306 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1307 iscsi_init2.hdr.flags = 1308 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1309 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1310 mask64 = 0x0ULL; 1311 mask64 |= ( 1312 /* CISCO MDS */ 1313 (1UL << 1314 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1315 /* HP MSA1510i */ 1316 (1UL << 1317 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1318 /* EMC */ 1319 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1320 if (error_mask1) { 1321 iscsi_init2.error_bit_map[0] = error_mask1; 1322 mask64 ^= (u32)(mask64); 1323 mask64 |= error_mask1; 1324 } else 1325 iscsi_init2.error_bit_map[0] = (u32) mask64; 1326 1327 if (error_mask2) { 1328 iscsi_init2.error_bit_map[1] = error_mask2; 1329 mask64 &= 0xffffffff; 1330 mask64 |= ((u64)error_mask2 << 32); 1331 } else 1332 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1333 1334 iscsi_error_mask = mask64; 1335 1336 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1337 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1338 1339 if (hba->cnic && hba->cnic->submit_kwqes) 1340 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1341 return rc; 1342 } 1343 1344 1345 /** 1346 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1347 * @session: iscsi session 1348 * @bnx2i_conn: bnx2i connection 1349 * @cqe: pointer to newly DMA'ed CQE entry for processing 1350 * 1351 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1352 */ 1353 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1354 struct bnx2i_conn *bnx2i_conn, 1355 struct cqe *cqe) 1356 { 1357 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1358 struct bnx2i_hba *hba = bnx2i_conn->hba; 1359 struct bnx2i_cmd_response *resp_cqe; 1360 struct bnx2i_cmd *bnx2i_cmd; 1361 struct iscsi_task *task; 1362 struct iscsi_scsi_rsp *hdr; 1363 u32 datalen = 0; 1364 1365 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1366 spin_lock_bh(&session->back_lock); 1367 task = iscsi_itt_to_task(conn, 1368 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1369 if (!task) 1370 goto fail; 1371 1372 bnx2i_cmd = task->dd_data; 1373 1374 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { 1375 conn->datain_pdus_cnt += 1376 resp_cqe->task_stat.read_stat.num_data_ins; 1377 conn->rxdata_octets += 1378 bnx2i_cmd->req.total_data_transfer_length; 1379 ADD_STATS_64(hba, rx_pdus, 1380 resp_cqe->task_stat.read_stat.num_data_ins); 1381 ADD_STATS_64(hba, rx_bytes, 1382 bnx2i_cmd->req.total_data_transfer_length); 1383 } else { 1384 conn->dataout_pdus_cnt += 1385 resp_cqe->task_stat.write_stat.num_data_outs; 1386 conn->r2t_pdus_cnt += 1387 resp_cqe->task_stat.write_stat.num_r2ts; 1388 conn->txdata_octets += 1389 bnx2i_cmd->req.total_data_transfer_length; 1390 ADD_STATS_64(hba, tx_pdus, 1391 resp_cqe->task_stat.write_stat.num_data_outs); 1392 ADD_STATS_64(hba, tx_bytes, 1393 bnx2i_cmd->req.total_data_transfer_length); 1394 ADD_STATS_64(hba, rx_pdus, 1395 resp_cqe->task_stat.write_stat.num_r2ts); 1396 } 1397 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1398 1399 hdr = (struct iscsi_scsi_rsp *)task->hdr; 1400 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1401 hdr->opcode = resp_cqe->op_code; 1402 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1403 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1404 hdr->response = resp_cqe->response; 1405 hdr->cmd_status = resp_cqe->status; 1406 hdr->flags = resp_cqe->response_flags; 1407 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1408 1409 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1410 goto done; 1411 1412 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1413 datalen = resp_cqe->data_length; 1414 if (datalen < 2) 1415 goto done; 1416 1417 if (datalen > BNX2I_RQ_WQE_SIZE) { 1418 iscsi_conn_printk(KERN_ERR, conn, 1419 "sense data len %d > RQ sz\n", 1420 datalen); 1421 datalen = BNX2I_RQ_WQE_SIZE; 1422 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1423 iscsi_conn_printk(KERN_ERR, conn, 1424 "sense data len %d > conn data\n", 1425 datalen); 1426 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1427 } 1428 1429 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1430 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1431 } 1432 1433 done: 1434 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1435 conn->data, datalen); 1436 fail: 1437 spin_unlock_bh(&session->back_lock); 1438 return 0; 1439 } 1440 1441 1442 /** 1443 * bnx2i_process_login_resp - this function handles iscsi login response 1444 * @session: iscsi session pointer 1445 * @bnx2i_conn: iscsi connection pointer 1446 * @cqe: pointer to newly DMA'ed CQE entry for processing 1447 * 1448 * process Login Response CQE & complete it to open-iscsi user daemon 1449 */ 1450 static int bnx2i_process_login_resp(struct iscsi_session *session, 1451 struct bnx2i_conn *bnx2i_conn, 1452 struct cqe *cqe) 1453 { 1454 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1455 struct iscsi_task *task; 1456 struct bnx2i_login_response *login; 1457 struct iscsi_login_rsp *resp_hdr; 1458 int pld_len; 1459 int pad_len; 1460 1461 login = (struct bnx2i_login_response *) cqe; 1462 spin_lock(&session->back_lock); 1463 task = iscsi_itt_to_task(conn, 1464 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1465 if (!task) 1466 goto done; 1467 1468 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1469 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1470 resp_hdr->opcode = login->op_code; 1471 resp_hdr->flags = login->response_flags; 1472 resp_hdr->max_version = login->version_max; 1473 resp_hdr->active_version = login->version_active; 1474 resp_hdr->hlength = 0; 1475 1476 hton24(resp_hdr->dlength, login->data_length); 1477 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1478 resp_hdr->tsih = cpu_to_be16(login->tsih); 1479 resp_hdr->itt = task->hdr->itt; 1480 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1481 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1482 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1483 resp_hdr->status_class = login->status_class; 1484 resp_hdr->status_detail = login->status_detail; 1485 pld_len = login->data_length; 1486 bnx2i_conn->gen_pdu.resp_wr_ptr = 1487 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1488 1489 pad_len = 0; 1490 if (pld_len & 0x3) 1491 pad_len = 4 - (pld_len % 4); 1492 1493 if (pad_len) { 1494 int i = 0; 1495 for (i = 0; i < pad_len; i++) { 1496 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1497 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1498 } 1499 } 1500 1501 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1502 bnx2i_conn->gen_pdu.resp_buf, 1503 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1504 done: 1505 spin_unlock(&session->back_lock); 1506 return 0; 1507 } 1508 1509 1510 /** 1511 * bnx2i_process_text_resp - this function handles iscsi text response 1512 * @session: iscsi session pointer 1513 * @bnx2i_conn: iscsi connection pointer 1514 * @cqe: pointer to newly DMA'ed CQE entry for processing 1515 * 1516 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon 1517 */ 1518 static int bnx2i_process_text_resp(struct iscsi_session *session, 1519 struct bnx2i_conn *bnx2i_conn, 1520 struct cqe *cqe) 1521 { 1522 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1523 struct iscsi_task *task; 1524 struct bnx2i_text_response *text; 1525 struct iscsi_text_rsp *resp_hdr; 1526 int pld_len; 1527 int pad_len; 1528 1529 text = (struct bnx2i_text_response *) cqe; 1530 spin_lock(&session->back_lock); 1531 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1532 if (!task) 1533 goto done; 1534 1535 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; 1536 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1537 resp_hdr->opcode = text->op_code; 1538 resp_hdr->flags = text->response_flags; 1539 resp_hdr->hlength = 0; 1540 1541 hton24(resp_hdr->dlength, text->data_length); 1542 resp_hdr->itt = task->hdr->itt; 1543 resp_hdr->ttt = cpu_to_be32(text->ttt); 1544 resp_hdr->statsn = task->hdr->exp_statsn; 1545 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); 1546 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); 1547 pld_len = text->data_length; 1548 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + 1549 pld_len; 1550 pad_len = 0; 1551 if (pld_len & 0x3) 1552 pad_len = 4 - (pld_len % 4); 1553 1554 if (pad_len) { 1555 int i = 0; 1556 for (i = 0; i < pad_len; i++) { 1557 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1558 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1559 } 1560 } 1561 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1562 bnx2i_conn->gen_pdu.resp_buf, 1563 bnx2i_conn->gen_pdu.resp_wr_ptr - 1564 bnx2i_conn->gen_pdu.resp_buf); 1565 done: 1566 spin_unlock(&session->back_lock); 1567 return 0; 1568 } 1569 1570 1571 /** 1572 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1573 * @session: iscsi session pointer 1574 * @bnx2i_conn: iscsi connection pointer 1575 * @cqe: pointer to newly DMA'ed CQE entry for processing 1576 * 1577 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1578 */ 1579 static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1580 struct bnx2i_conn *bnx2i_conn, 1581 struct cqe *cqe) 1582 { 1583 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1584 struct iscsi_task *task; 1585 struct bnx2i_tmf_response *tmf_cqe; 1586 struct iscsi_tm_rsp *resp_hdr; 1587 1588 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1589 spin_lock(&session->back_lock); 1590 task = iscsi_itt_to_task(conn, 1591 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1592 if (!task) 1593 goto done; 1594 1595 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1596 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1597 resp_hdr->opcode = tmf_cqe->op_code; 1598 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1599 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1600 resp_hdr->itt = task->hdr->itt; 1601 resp_hdr->response = tmf_cqe->response; 1602 1603 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1604 done: 1605 spin_unlock(&session->back_lock); 1606 return 0; 1607 } 1608 1609 /** 1610 * bnx2i_process_logout_resp - this function handles iscsi logout response 1611 * @session: iscsi session pointer 1612 * @bnx2i_conn: iscsi connection pointer 1613 * @cqe: pointer to newly DMA'ed CQE entry for processing 1614 * 1615 * process iSCSI Logout Response CQE & make function call to 1616 * notify the user daemon. 1617 */ 1618 static int bnx2i_process_logout_resp(struct iscsi_session *session, 1619 struct bnx2i_conn *bnx2i_conn, 1620 struct cqe *cqe) 1621 { 1622 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1623 struct iscsi_task *task; 1624 struct bnx2i_logout_response *logout; 1625 struct iscsi_logout_rsp *resp_hdr; 1626 1627 logout = (struct bnx2i_logout_response *) cqe; 1628 spin_lock(&session->back_lock); 1629 task = iscsi_itt_to_task(conn, 1630 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1631 if (!task) 1632 goto done; 1633 1634 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1635 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1636 resp_hdr->opcode = logout->op_code; 1637 resp_hdr->flags = logout->response; 1638 resp_hdr->hlength = 0; 1639 1640 resp_hdr->itt = task->hdr->itt; 1641 resp_hdr->statsn = task->hdr->exp_statsn; 1642 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1643 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1644 1645 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1646 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1647 1648 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1649 1650 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1651 done: 1652 spin_unlock(&session->back_lock); 1653 return 0; 1654 } 1655 1656 /** 1657 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1658 * @session: iscsi session pointer 1659 * @bnx2i_conn: iscsi connection pointer 1660 * @cqe: pointer to newly DMA'ed CQE entry for processing 1661 * 1662 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1663 */ 1664 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1665 struct bnx2i_conn *bnx2i_conn, 1666 struct cqe *cqe) 1667 { 1668 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1669 struct bnx2i_nop_in_msg *nop_in; 1670 struct iscsi_task *task; 1671 1672 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1673 spin_lock(&session->back_lock); 1674 task = iscsi_itt_to_task(conn, 1675 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1676 if (task) 1677 __iscsi_put_task(task); 1678 spin_unlock(&session->back_lock); 1679 } 1680 1681 /** 1682 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1683 * @conn: iscsi connection 1684 * 1685 * Firmware advances RQ producer index for every unsolicited PDU even if 1686 * payload data length is '0'. This function makes corresponding 1687 * adjustments on the driver side to match this f/w behavior 1688 */ 1689 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1690 { 1691 char dummy_rq_data[2]; 1692 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1693 bnx2i_put_rq_buf(bnx2i_conn, 1); 1694 } 1695 1696 1697 /** 1698 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1699 * @session: iscsi session pointer 1700 * @bnx2i_conn: iscsi connection pointer 1701 * @cqe: pointer to newly DMA'ed CQE entry for processing 1702 * 1703 * process iSCSI target's proactive iSCSI NOPIN request 1704 */ 1705 static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1706 struct bnx2i_conn *bnx2i_conn, 1707 struct cqe *cqe) 1708 { 1709 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1710 struct iscsi_task *task; 1711 struct bnx2i_nop_in_msg *nop_in; 1712 struct iscsi_nopin *hdr; 1713 int tgt_async_nop = 0; 1714 1715 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1716 1717 spin_lock(&session->back_lock); 1718 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1719 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1720 hdr->opcode = nop_in->op_code; 1721 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1722 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1723 hdr->ttt = cpu_to_be32(nop_in->ttt); 1724 1725 if (nop_in->itt == (u16) RESERVED_ITT) { 1726 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1727 hdr->itt = RESERVED_ITT; 1728 tgt_async_nop = 1; 1729 goto done; 1730 } 1731 1732 /* this is a response to one of our nop-outs */ 1733 task = iscsi_itt_to_task(conn, 1734 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1735 if (task) { 1736 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1737 hdr->itt = task->hdr->itt; 1738 hdr->ttt = cpu_to_be32(nop_in->ttt); 1739 memcpy(&hdr->lun, nop_in->lun, 8); 1740 } 1741 done: 1742 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1743 spin_unlock(&session->back_lock); 1744 1745 return tgt_async_nop; 1746 } 1747 1748 1749 /** 1750 * bnx2i_process_async_mesg - this function handles iscsi async message 1751 * @session: iscsi session pointer 1752 * @bnx2i_conn: iscsi connection pointer 1753 * @cqe: pointer to newly DMA'ed CQE entry for processing 1754 * 1755 * process iSCSI ASYNC Message 1756 */ 1757 static void bnx2i_process_async_mesg(struct iscsi_session *session, 1758 struct bnx2i_conn *bnx2i_conn, 1759 struct cqe *cqe) 1760 { 1761 struct bnx2i_async_msg *async_cqe; 1762 struct iscsi_async *resp_hdr; 1763 u8 async_event; 1764 1765 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1766 1767 async_cqe = (struct bnx2i_async_msg *)cqe; 1768 async_event = async_cqe->async_event; 1769 1770 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1771 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1772 "async: scsi events not supported\n"); 1773 return; 1774 } 1775 1776 spin_lock(&session->back_lock); 1777 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1778 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1779 resp_hdr->opcode = async_cqe->op_code; 1780 resp_hdr->flags = 0x80; 1781 1782 memcpy(&resp_hdr->lun, async_cqe->lun, 8); 1783 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1784 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1785 1786 resp_hdr->async_event = async_cqe->async_event; 1787 resp_hdr->async_vcode = async_cqe->async_vcode; 1788 1789 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1790 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1791 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1792 1793 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1794 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1795 spin_unlock(&session->back_lock); 1796 } 1797 1798 1799 /** 1800 * bnx2i_process_reject_mesg - process iscsi reject pdu 1801 * @session: iscsi session pointer 1802 * @bnx2i_conn: iscsi connection pointer 1803 * @cqe: pointer to newly DMA'ed CQE entry for processing 1804 * 1805 * process iSCSI REJECT message 1806 */ 1807 static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1808 struct bnx2i_conn *bnx2i_conn, 1809 struct cqe *cqe) 1810 { 1811 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1812 struct bnx2i_reject_msg *reject; 1813 struct iscsi_reject *hdr; 1814 1815 reject = (struct bnx2i_reject_msg *) cqe; 1816 if (reject->data_length) { 1817 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1818 bnx2i_put_rq_buf(bnx2i_conn, 1); 1819 } else 1820 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1821 1822 spin_lock(&session->back_lock); 1823 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1824 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1825 hdr->opcode = reject->op_code; 1826 hdr->reason = reject->reason; 1827 hton24(hdr->dlength, reject->data_length); 1828 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1829 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1830 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1831 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1832 reject->data_length); 1833 spin_unlock(&session->back_lock); 1834 } 1835 1836 /** 1837 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1838 * @session: iscsi session pointer 1839 * @bnx2i_conn: iscsi connection pointer 1840 * @cqe: pointer to newly DMA'ed CQE entry for processing 1841 * 1842 * process command cleanup response CQE during conn shutdown or error recovery 1843 */ 1844 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1845 struct bnx2i_conn *bnx2i_conn, 1846 struct cqe *cqe) 1847 { 1848 struct bnx2i_cleanup_response *cmd_clean_rsp; 1849 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1850 struct iscsi_task *task; 1851 1852 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1853 spin_lock(&session->back_lock); 1854 task = iscsi_itt_to_task(conn, 1855 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1856 if (!task) 1857 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1858 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1859 spin_unlock(&session->back_lock); 1860 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1861 } 1862 1863 1864 /** 1865 * bnx2i_percpu_io_thread - thread per cpu for ios 1866 * 1867 * @arg: ptr to bnx2i_percpu_info structure 1868 */ 1869 int bnx2i_percpu_io_thread(void *arg) 1870 { 1871 struct bnx2i_percpu_s *p = arg; 1872 struct bnx2i_work *work, *tmp; 1873 LIST_HEAD(work_list); 1874 1875 set_user_nice(current, MIN_NICE); 1876 1877 while (!kthread_should_stop()) { 1878 spin_lock_bh(&p->p_work_lock); 1879 while (!list_empty(&p->work_list)) { 1880 list_splice_init(&p->work_list, &work_list); 1881 spin_unlock_bh(&p->p_work_lock); 1882 1883 list_for_each_entry_safe(work, tmp, &work_list, list) { 1884 list_del_init(&work->list); 1885 /* work allocated in the bh, freed here */ 1886 bnx2i_process_scsi_cmd_resp(work->session, 1887 work->bnx2i_conn, 1888 &work->cqe); 1889 atomic_dec(&work->bnx2i_conn->work_cnt); 1890 kfree(work); 1891 } 1892 spin_lock_bh(&p->p_work_lock); 1893 } 1894 set_current_state(TASK_INTERRUPTIBLE); 1895 spin_unlock_bh(&p->p_work_lock); 1896 schedule(); 1897 } 1898 __set_current_state(TASK_RUNNING); 1899 1900 return 0; 1901 } 1902 1903 1904 /** 1905 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread 1906 * @bnx2i_conn: bnx2i connection 1907 * 1908 * this function is called by generic KCQ handler to queue all pending cmd 1909 * completion CQEs 1910 * 1911 * The implementation is to queue the cmd response based on the 1912 * last recorded command for the given connection. The 1913 * cpu_id gets recorded upon task_xmit. No out-of-order completion! 1914 */ 1915 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, 1916 struct bnx2i_conn *bnx2i_conn, 1917 struct bnx2i_nop_in_msg *cqe) 1918 { 1919 struct bnx2i_work *bnx2i_work = NULL; 1920 struct bnx2i_percpu_s *p = NULL; 1921 struct iscsi_task *task; 1922 struct scsi_cmnd *sc; 1923 int rc = 0; 1924 int cpu; 1925 1926 spin_lock(&session->back_lock); 1927 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, 1928 cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1929 if (!task || !task->sc) { 1930 spin_unlock(&session->back_lock); 1931 return -EINVAL; 1932 } 1933 sc = task->sc; 1934 1935 if (!blk_rq_cpu_valid(sc->request)) 1936 cpu = smp_processor_id(); 1937 else 1938 cpu = sc->request->cpu; 1939 1940 spin_unlock(&session->back_lock); 1941 1942 p = &per_cpu(bnx2i_percpu, cpu); 1943 spin_lock(&p->p_work_lock); 1944 if (unlikely(!p->iothread)) { 1945 rc = -EINVAL; 1946 goto err; 1947 } 1948 /* Alloc and copy to the cqe */ 1949 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC); 1950 if (bnx2i_work) { 1951 INIT_LIST_HEAD(&bnx2i_work->list); 1952 bnx2i_work->session = session; 1953 bnx2i_work->bnx2i_conn = bnx2i_conn; 1954 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe)); 1955 list_add_tail(&bnx2i_work->list, &p->work_list); 1956 atomic_inc(&bnx2i_conn->work_cnt); 1957 wake_up_process(p->iothread); 1958 spin_unlock(&p->p_work_lock); 1959 goto done; 1960 } else 1961 rc = -ENOMEM; 1962 err: 1963 spin_unlock(&p->p_work_lock); 1964 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe); 1965 done: 1966 return rc; 1967 } 1968 1969 1970 /** 1971 * bnx2i_process_new_cqes - process newly DMA'ed CQE's 1972 * @bnx2i_conn: bnx2i connection 1973 * 1974 * this function is called by generic KCQ handler to process all pending CQE's 1975 */ 1976 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) 1977 { 1978 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1979 struct iscsi_session *session = conn->session; 1980 struct bnx2i_hba *hba = bnx2i_conn->hba; 1981 struct qp_info *qp; 1982 struct bnx2i_nop_in_msg *nopin; 1983 int tgt_async_msg; 1984 int cqe_cnt = 0; 1985 1986 if (bnx2i_conn->ep == NULL) 1987 return 0; 1988 1989 qp = &bnx2i_conn->ep->qp; 1990 1991 if (!qp->cq_virt) { 1992 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", 1993 hba->netdev->name); 1994 goto out; 1995 } 1996 while (1) { 1997 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1998 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1999 break; 2000 2001 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { 2002 if (nopin->op_code == ISCSI_OP_NOOP_IN && 2003 nopin->itt == (u16) RESERVED_ITT) { 2004 printk(KERN_ALERT "bnx2i: Unsolicited " 2005 "NOP-In detected for suspended " 2006 "connection dev=%s!\n", 2007 hba->netdev->name); 2008 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 2009 goto cqe_out; 2010 } 2011 break; 2012 } 2013 tgt_async_msg = 0; 2014 2015 switch (nopin->op_code) { 2016 case ISCSI_OP_SCSI_CMD_RSP: 2017 case ISCSI_OP_SCSI_DATA_IN: 2018 /* Run the kthread engine only for data cmds 2019 All other cmds will be completed in this bh! */ 2020 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); 2021 goto done; 2022 case ISCSI_OP_LOGIN_RSP: 2023 bnx2i_process_login_resp(session, bnx2i_conn, 2024 qp->cq_cons_qe); 2025 break; 2026 case ISCSI_OP_SCSI_TMFUNC_RSP: 2027 bnx2i_process_tmf_resp(session, bnx2i_conn, 2028 qp->cq_cons_qe); 2029 break; 2030 case ISCSI_OP_TEXT_RSP: 2031 bnx2i_process_text_resp(session, bnx2i_conn, 2032 qp->cq_cons_qe); 2033 break; 2034 case ISCSI_OP_LOGOUT_RSP: 2035 bnx2i_process_logout_resp(session, bnx2i_conn, 2036 qp->cq_cons_qe); 2037 break; 2038 case ISCSI_OP_NOOP_IN: 2039 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 2040 qp->cq_cons_qe)) 2041 tgt_async_msg = 1; 2042 break; 2043 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 2044 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 2045 qp->cq_cons_qe); 2046 break; 2047 case ISCSI_OP_ASYNC_EVENT: 2048 bnx2i_process_async_mesg(session, bnx2i_conn, 2049 qp->cq_cons_qe); 2050 tgt_async_msg = 1; 2051 break; 2052 case ISCSI_OP_REJECT: 2053 bnx2i_process_reject_mesg(session, bnx2i_conn, 2054 qp->cq_cons_qe); 2055 break; 2056 case ISCSI_OPCODE_CLEANUP_RESPONSE: 2057 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 2058 qp->cq_cons_qe); 2059 break; 2060 default: 2061 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2062 nopin->op_code); 2063 } 2064 2065 ADD_STATS_64(hba, rx_pdus, 1); 2066 ADD_STATS_64(hba, rx_bytes, nopin->data_length); 2067 done: 2068 if (!tgt_async_msg) { 2069 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) 2070 printk(KERN_ALERT "bnx2i (%s): no active cmd! " 2071 "op 0x%x\n", 2072 hba->netdev->name, 2073 nopin->op_code); 2074 else 2075 atomic_dec(&bnx2i_conn->ep->num_active_cmds); 2076 } 2077 cqe_out: 2078 /* clear out in production version only, till beta keep opcode 2079 * field intact, will be helpful in debugging (context dump) 2080 * nopin->op_code = 0; 2081 */ 2082 cqe_cnt++; 2083 qp->cqe_exp_seq_sn++; 2084 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 2085 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 2086 2087 if (qp->cq_cons_qe == qp->cq_last_qe) { 2088 qp->cq_cons_qe = qp->cq_first_qe; 2089 qp->cq_cons_idx = 0; 2090 } else { 2091 qp->cq_cons_qe++; 2092 qp->cq_cons_idx++; 2093 } 2094 } 2095 out: 2096 return cqe_cnt; 2097 } 2098 2099 /** 2100 * bnx2i_fastpath_notification - process global event queue (KCQ) 2101 * @hba: adapter structure pointer 2102 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 2103 * 2104 * Fast path event notification handler, KCQ entry carries context id 2105 * of the connection that has 1 or more pending CQ entries 2106 */ 2107 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 2108 struct iscsi_kcqe *new_cqe_kcqe) 2109 { 2110 struct bnx2i_conn *bnx2i_conn; 2111 u32 iscsi_cid; 2112 int nxt_idx; 2113 2114 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 2115 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2116 2117 if (!bnx2i_conn) { 2118 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 2119 return; 2120 } 2121 if (!bnx2i_conn->ep) { 2122 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 2123 return; 2124 } 2125 2126 bnx2i_process_new_cqes(bnx2i_conn); 2127 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, 2128 CNIC_ARM_CQE_FP); 2129 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) 2130 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); 2131 } 2132 2133 2134 /** 2135 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 2136 * @hba: adapter structure pointer 2137 * @update_kcqe: kcqe pointer 2138 * 2139 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 2140 */ 2141 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 2142 struct iscsi_kcqe *update_kcqe) 2143 { 2144 struct bnx2i_conn *conn; 2145 u32 iscsi_cid; 2146 2147 iscsi_cid = update_kcqe->iscsi_conn_id; 2148 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2149 2150 if (!conn) { 2151 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 2152 return; 2153 } 2154 if (!conn->ep) { 2155 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 2156 return; 2157 } 2158 2159 if (update_kcqe->completion_status) { 2160 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 2161 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 2162 } else 2163 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 2164 2165 wake_up_interruptible(&conn->ep->ofld_wait); 2166 } 2167 2168 2169 /** 2170 * bnx2i_recovery_que_add_conn - add connection to recovery queue 2171 * @hba: adapter structure pointer 2172 * @bnx2i_conn: iscsi connection 2173 * 2174 * Add connection to recovery queue and schedule adapter eh worker 2175 */ 2176 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 2177 struct bnx2i_conn *bnx2i_conn) 2178 { 2179 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 2180 ISCSI_ERR_CONN_FAILED); 2181 } 2182 2183 2184 /** 2185 * bnx2i_process_tcp_error - process error notification on a given connection 2186 * 2187 * @hba: adapter structure pointer 2188 * @tcp_err: tcp error kcqe pointer 2189 * 2190 * handles tcp level error notifications from FW. 2191 */ 2192 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 2193 struct iscsi_kcqe *tcp_err) 2194 { 2195 struct bnx2i_conn *bnx2i_conn; 2196 u32 iscsi_cid; 2197 2198 iscsi_cid = tcp_err->iscsi_conn_id; 2199 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2200 2201 if (!bnx2i_conn) { 2202 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2203 return; 2204 } 2205 2206 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 2207 iscsi_cid, tcp_err->completion_status); 2208 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2209 } 2210 2211 2212 /** 2213 * bnx2i_process_iscsi_error - process error notification on a given connection 2214 * @hba: adapter structure pointer 2215 * @iscsi_err: iscsi error kcqe pointer 2216 * 2217 * handles iscsi error notifications from the FW. Firmware based in initial 2218 * handshake classifies iscsi protocol / TCP rfc violation into either 2219 * warning or error indications. If indication is of "Error" type, driver 2220 * will initiate session recovery for that connection/session. For 2221 * "Warning" type indication, driver will put out a system log message 2222 * (there will be only one message for each type for the life of the 2223 * session, this is to avoid un-necessarily overloading the system) 2224 */ 2225 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 2226 struct iscsi_kcqe *iscsi_err) 2227 { 2228 struct bnx2i_conn *bnx2i_conn; 2229 u32 iscsi_cid; 2230 char warn_notice[] = "iscsi_warning"; 2231 char error_notice[] = "iscsi_error"; 2232 char additional_notice[64]; 2233 char *message; 2234 int need_recovery; 2235 u64 err_mask64; 2236 2237 iscsi_cid = iscsi_err->iscsi_conn_id; 2238 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2239 if (!bnx2i_conn) { 2240 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2241 return; 2242 } 2243 2244 err_mask64 = (0x1ULL << iscsi_err->completion_status); 2245 2246 if (err_mask64 & iscsi_error_mask) { 2247 need_recovery = 0; 2248 message = warn_notice; 2249 } else { 2250 need_recovery = 1; 2251 message = error_notice; 2252 } 2253 2254 switch (iscsi_err->completion_status) { 2255 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 2256 strcpy(additional_notice, "hdr digest err"); 2257 break; 2258 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 2259 strcpy(additional_notice, "data digest err"); 2260 break; 2261 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 2262 strcpy(additional_notice, "wrong opcode rcvd"); 2263 break; 2264 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 2265 strcpy(additional_notice, "AHS len > 0 rcvd"); 2266 break; 2267 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 2268 strcpy(additional_notice, "invalid ITT rcvd"); 2269 break; 2270 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 2271 strcpy(additional_notice, "wrong StatSN rcvd"); 2272 break; 2273 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 2274 strcpy(additional_notice, "wrong DataSN rcvd"); 2275 break; 2276 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 2277 strcpy(additional_notice, "pend R2T violation"); 2278 break; 2279 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 2280 strcpy(additional_notice, "ERL0, UO"); 2281 break; 2282 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2283 strcpy(additional_notice, "ERL0, U1"); 2284 break; 2285 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2286 strcpy(additional_notice, "ERL0, U2"); 2287 break; 2288 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2289 strcpy(additional_notice, "ERL0, U3"); 2290 break; 2291 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2292 strcpy(additional_notice, "ERL0, U4"); 2293 break; 2294 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2295 strcpy(additional_notice, "ERL0, U5"); 2296 break; 2297 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2298 strcpy(additional_notice, "ERL0, U6"); 2299 break; 2300 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2301 strcpy(additional_notice, "invalid resi len"); 2302 break; 2303 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2304 strcpy(additional_notice, "MRDSL violation"); 2305 break; 2306 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2307 strcpy(additional_notice, "F-bit not set"); 2308 break; 2309 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2310 strcpy(additional_notice, "invalid TTT"); 2311 break; 2312 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2313 strcpy(additional_notice, "invalid DataSN"); 2314 break; 2315 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2316 strcpy(additional_notice, "burst len violation"); 2317 break; 2318 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2319 strcpy(additional_notice, "buf offset violation"); 2320 break; 2321 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2322 strcpy(additional_notice, "invalid LUN field"); 2323 break; 2324 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2325 strcpy(additional_notice, "invalid R2TSN field"); 2326 break; 2327 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2328 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2329 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2330 strcpy(additional_notice, "invalid cmd len1"); 2331 break; 2332 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2333 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2334 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2335 strcpy(additional_notice, "invalid cmd len2"); 2336 break; 2337 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2338 strcpy(additional_notice, 2339 "pend r2t exceeds MaxOutstandingR2T value"); 2340 break; 2341 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2342 strcpy(additional_notice, "TTT is rsvd"); 2343 break; 2344 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2345 strcpy(additional_notice, "MBL violation"); 2346 break; 2347 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2348 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2349 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2350 strcpy(additional_notice, "data seg len != 0"); 2351 break; 2352 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2353 strcpy(additional_notice, "reject pdu len error"); 2354 break; 2355 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2356 strcpy(additional_notice, "async pdu len error"); 2357 break; 2358 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2359 strcpy(additional_notice, "nopin pdu len error"); 2360 break; 2361 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2362 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2363 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2364 strcpy(additional_notice, "pend r2t in cleanup"); 2365 break; 2366 2367 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2368 strcpy(additional_notice, "IP fragments rcvd"); 2369 break; 2370 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2371 strcpy(additional_notice, "IP options error"); 2372 break; 2373 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2374 strcpy(additional_notice, "urgent flag error"); 2375 break; 2376 default: 2377 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2378 iscsi_err->completion_status); 2379 } 2380 2381 if (need_recovery) { 2382 iscsi_conn_printk(KERN_ALERT, 2383 bnx2i_conn->cls_conn->dd_data, 2384 "bnx2i: %s - %s\n", 2385 message, additional_notice); 2386 2387 iscsi_conn_printk(KERN_ALERT, 2388 bnx2i_conn->cls_conn->dd_data, 2389 "conn_err - hostno %d conn %p, " 2390 "iscsi_cid %x cid %x\n", 2391 bnx2i_conn->hba->shost->host_no, 2392 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2393 bnx2i_conn->ep->ep_cid); 2394 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2395 } else 2396 if (!test_and_set_bit(iscsi_err->completion_status, 2397 (void *) &bnx2i_conn->violation_notified)) 2398 iscsi_conn_printk(KERN_ALERT, 2399 bnx2i_conn->cls_conn->dd_data, 2400 "bnx2i: %s - %s\n", 2401 message, additional_notice); 2402 } 2403 2404 2405 /** 2406 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2407 * @hba: adapter structure pointer 2408 * @conn_destroy: conn destroy kcqe pointer 2409 * 2410 * handles connection destroy completion request. 2411 */ 2412 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2413 struct iscsi_kcqe *conn_destroy) 2414 { 2415 struct bnx2i_endpoint *ep; 2416 2417 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2418 if (!ep) { 2419 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2420 "offload request, unexpected complection\n"); 2421 return; 2422 } 2423 2424 if (hba != ep->hba) { 2425 printk(KERN_ALERT "conn destroy- error hba mis-match\n"); 2426 return; 2427 } 2428 2429 if (conn_destroy->completion_status) { 2430 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2431 ep->state = EP_STATE_CLEANUP_FAILED; 2432 } else 2433 ep->state = EP_STATE_CLEANUP_CMPL; 2434 wake_up_interruptible(&ep->ofld_wait); 2435 } 2436 2437 2438 /** 2439 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2440 * @hba: adapter structure pointer 2441 * @ofld_kcqe: conn offload kcqe pointer 2442 * 2443 * handles initial connection offload completion, ep_connect() thread is 2444 * woken-up to continue with LLP connect process 2445 */ 2446 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2447 struct iscsi_kcqe *ofld_kcqe) 2448 { 2449 u32 cid_addr; 2450 struct bnx2i_endpoint *ep; 2451 u32 cid_num; 2452 2453 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2454 if (!ep) { 2455 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2456 return; 2457 } 2458 2459 if (hba != ep->hba) { 2460 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n"); 2461 return; 2462 } 2463 2464 if (ofld_kcqe->completion_status) { 2465 ep->state = EP_STATE_OFLD_FAILED; 2466 if (ofld_kcqe->completion_status == 2467 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2468 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2469 "to allocate iSCSI context resources\n", 2470 hba->netdev->name); 2471 else if (ofld_kcqe->completion_status == 2472 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2473 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2474 "opcode\n", hba->netdev->name); 2475 else if (ofld_kcqe->completion_status == 2476 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2477 /* error status code valid only for 5771x chipset */ 2478 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2479 else 2480 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2481 "error code %d\n", hba->netdev->name, 2482 ofld_kcqe->completion_status); 2483 } else { 2484 ep->state = EP_STATE_OFLD_COMPL; 2485 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2486 cid_num = bnx2i_get_cid_num(ep); 2487 ep->ep_cid = cid_addr; 2488 ep->qp.ctx_base = NULL; 2489 } 2490 wake_up_interruptible(&ep->ofld_wait); 2491 } 2492 2493 /** 2494 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE 2495 * @hba: adapter structure pointer 2496 * @update_kcqe: kcqe pointer 2497 * 2498 * Generic KCQ event handler/dispatcher 2499 */ 2500 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2501 u32 num_cqe) 2502 { 2503 struct bnx2i_hba *hba = context; 2504 int i = 0; 2505 struct iscsi_kcqe *ikcqe = NULL; 2506 2507 while (i < num_cqe) { 2508 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2509 2510 if (ikcqe->op_code == 2511 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2512 bnx2i_fastpath_notification(hba, ikcqe); 2513 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2514 bnx2i_process_ofld_cmpl(hba, ikcqe); 2515 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2516 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2517 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2518 if (ikcqe->completion_status != 2519 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2520 bnx2i_iscsi_license_error(hba, ikcqe->\ 2521 completion_status); 2522 else { 2523 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2524 bnx2i_get_link_state(hba); 2525 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2526 "ISCSI_INIT passed\n", 2527 (u8)hba->pcidev->bus->number, 2528 hba->pci_devno, 2529 (u8)hba->pci_func); 2530 2531 2532 } 2533 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2534 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2535 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2536 bnx2i_process_iscsi_error(hba, ikcqe); 2537 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2538 bnx2i_process_tcp_error(hba, ikcqe); 2539 else 2540 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2541 ikcqe->op_code); 2542 } 2543 } 2544 2545 2546 /** 2547 * bnx2i_indicate_netevent - Generic netdev event handler 2548 * @context: adapter structure pointer 2549 * @event: event type 2550 * @vlan_id: vlans id - associated vlan id with this event 2551 * 2552 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2553 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2554 */ 2555 static void bnx2i_indicate_netevent(void *context, unsigned long event, 2556 u16 vlan_id) 2557 { 2558 struct bnx2i_hba *hba = context; 2559 2560 /* Ignore all netevent coming from vlans */ 2561 if (vlan_id != 0) 2562 return; 2563 2564 switch (event) { 2565 case NETDEV_UP: 2566 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2567 bnx2i_send_fw_iscsi_init_msg(hba); 2568 break; 2569 case NETDEV_DOWN: 2570 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2571 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2572 break; 2573 case NETDEV_GOING_DOWN: 2574 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2575 iscsi_host_for_each_session(hba->shost, 2576 bnx2i_drop_session); 2577 break; 2578 case NETDEV_CHANGE: 2579 bnx2i_get_link_state(hba); 2580 break; 2581 default: 2582 ; 2583 } 2584 } 2585 2586 2587 /** 2588 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2589 * @cm_sk: cnic sock structure pointer 2590 * 2591 * function callback exported via bnx2i - cnic driver interface to 2592 * indicate completion of option-2 TCP connect request. 2593 */ 2594 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2595 { 2596 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2597 2598 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2599 ep->state = EP_STATE_CONNECT_FAILED; 2600 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2601 ep->state = EP_STATE_CONNECT_COMPL; 2602 else 2603 ep->state = EP_STATE_CONNECT_FAILED; 2604 2605 wake_up_interruptible(&ep->ofld_wait); 2606 } 2607 2608 2609 /** 2610 * bnx2i_cm_close_cmpl - process tcp conn close completion 2611 * @cm_sk: cnic sock structure pointer 2612 * 2613 * function callback exported via bnx2i - cnic driver interface to 2614 * indicate completion of option-2 graceful TCP connect shutdown 2615 */ 2616 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2617 { 2618 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2619 2620 ep->state = EP_STATE_DISCONN_COMPL; 2621 wake_up_interruptible(&ep->ofld_wait); 2622 } 2623 2624 2625 /** 2626 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2627 * @cm_sk: cnic sock structure pointer 2628 * 2629 * function callback exported via bnx2i - cnic driver interface to 2630 * indicate completion of option-2 abortive TCP connect termination 2631 */ 2632 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2633 { 2634 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2635 2636 ep->state = EP_STATE_DISCONN_COMPL; 2637 wake_up_interruptible(&ep->ofld_wait); 2638 } 2639 2640 2641 /** 2642 * bnx2i_cm_remote_close - process received TCP FIN 2643 * @hba: adapter structure pointer 2644 * @update_kcqe: kcqe pointer 2645 * 2646 * function callback exported via bnx2i - cnic driver interface to indicate 2647 * async TCP events such as FIN 2648 */ 2649 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2650 { 2651 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2652 2653 ep->state = EP_STATE_TCP_FIN_RCVD; 2654 if (ep->conn) 2655 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2656 } 2657 2658 /** 2659 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2660 * @hba: adapter structure pointer 2661 * @update_kcqe: kcqe pointer 2662 * 2663 * function callback exported via bnx2i - cnic driver interface to 2664 * indicate async TCP events (RST) sent by the peer. 2665 */ 2666 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2667 { 2668 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2669 u32 old_state = ep->state; 2670 2671 ep->state = EP_STATE_TCP_RST_RCVD; 2672 if (old_state == EP_STATE_DISCONN_START) 2673 wake_up_interruptible(&ep->ofld_wait); 2674 else 2675 if (ep->conn) 2676 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2677 } 2678 2679 2680 static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2681 char *buf, u16 buflen) 2682 { 2683 struct bnx2i_hba *hba = context; 2684 int rc; 2685 2686 if (!hba) 2687 return -ENODEV; 2688 2689 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2690 msg_type, buf, buflen); 2691 if (rc) 2692 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2693 2694 return rc; 2695 } 2696 2697 2698 /** 2699 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2700 * carrying callback function pointers 2701 * 2702 */ 2703 struct cnic_ulp_ops bnx2i_cnic_cb = { 2704 .cnic_init = bnx2i_ulp_init, 2705 .cnic_exit = bnx2i_ulp_exit, 2706 .cnic_start = bnx2i_start, 2707 .cnic_stop = bnx2i_stop, 2708 .indicate_kcqes = bnx2i_indicate_kcqe, 2709 .indicate_netevent = bnx2i_indicate_netevent, 2710 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2711 .cm_close_complete = bnx2i_cm_close_cmpl, 2712 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2713 .cm_remote_close = bnx2i_cm_remote_close, 2714 .cm_remote_abort = bnx2i_cm_remote_abort, 2715 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2716 .cnic_get_stats = bnx2i_get_stats, 2717 .owner = THIS_MODULE 2718 }; 2719 2720 2721 /** 2722 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2723 * @ep: bnx2i endpoint 2724 * 2725 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2726 * register in BAR #0. Whereas in 57710 these register are accessed by 2727 * mapping BAR #1 2728 */ 2729 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2730 { 2731 u32 cid_num; 2732 u32 reg_off; 2733 u32 first_l4l5; 2734 u32 ctx_sz; 2735 u32 config2; 2736 resource_size_t reg_base; 2737 2738 cid_num = bnx2i_get_cid_num(ep); 2739 2740 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2741 reg_base = pci_resource_start(ep->hba->pcidev, 2742 BNX2X_DOORBELL_PCI_BAR); 2743 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF); 2744 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4); 2745 goto arm_cq; 2746 } 2747 2748 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && 2749 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { 2750 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); 2751 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; 2752 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; 2753 if (ctx_sz) 2754 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE 2755 + BNX2I_570X_PAGE_SIZE_DEFAULT * 2756 (((cid_num - first_l4l5) / ctx_sz) + 256); 2757 else 2758 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2759 } else 2760 /* 5709 device in normal node and 5706/5708 devices */ 2761 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2762 2763 ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off, 2764 MB_KERNEL_CTX_SIZE); 2765 if (!ep->qp.ctx_base) 2766 return -ENOMEM; 2767 2768 arm_cq: 2769 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); 2770 return 0; 2771 } 2772