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