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_zalloc_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 ep->qp.sq_first_qe = ep->qp.sq_virt; 1082 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1083 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1084 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1085 ep->qp.sq_prod_idx = 0; 1086 ep->qp.sq_cons_idx = 0; 1087 ep->qp.sqe_left = hba->max_sqes; 1088 1089 /* Allocate page table memory for CQ which is page aligned */ 1090 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1091 ep->qp.cq_mem_size = 1092 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1093 ep->qp.cq_pgtbl_size = 1094 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1095 ep->qp.cq_pgtbl_size = 1096 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1097 1098 ep->qp.cq_pgtbl_virt = 1099 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1100 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1101 if (!ep->qp.cq_pgtbl_virt) { 1102 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1103 ep->qp.cq_pgtbl_size); 1104 goto mem_alloc_err; 1105 } 1106 1107 /* Allocate memory area for actual CQ element */ 1108 ep->qp.cq_virt = 1109 dma_zalloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1110 &ep->qp.cq_phys, GFP_KERNEL); 1111 if (!ep->qp.cq_virt) { 1112 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1113 ep->qp.cq_mem_size); 1114 goto mem_alloc_err; 1115 } 1116 1117 ep->qp.cq_first_qe = ep->qp.cq_virt; 1118 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1119 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1120 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1121 ep->qp.cq_prod_idx = 0; 1122 ep->qp.cq_cons_idx = 0; 1123 ep->qp.cqe_left = hba->max_cqes; 1124 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1125 ep->qp.cqe_size = hba->max_cqes; 1126 1127 /* Invalidate all EQ CQE index, req only for 57710 */ 1128 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1129 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1130 1131 /* Allocate page table memory for RQ which is page aligned */ 1132 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1133 ep->qp.rq_mem_size = 1134 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1135 ep->qp.rq_pgtbl_size = 1136 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); 1137 ep->qp.rq_pgtbl_size = 1138 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; 1139 1140 ep->qp.rq_pgtbl_virt = 1141 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1142 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1143 if (!ep->qp.rq_pgtbl_virt) { 1144 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1145 ep->qp.rq_pgtbl_size); 1146 goto mem_alloc_err; 1147 } 1148 1149 /* Allocate memory area for actual RQ element */ 1150 ep->qp.rq_virt = 1151 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1152 &ep->qp.rq_phys, GFP_KERNEL); 1153 if (!ep->qp.rq_virt) { 1154 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1155 ep->qp.rq_mem_size); 1156 goto mem_alloc_err; 1157 } 1158 1159 ep->qp.rq_first_qe = ep->qp.rq_virt; 1160 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1161 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1162 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1163 ep->qp.rq_prod_idx = 0x8000; 1164 ep->qp.rq_cons_idx = 0; 1165 ep->qp.rqe_left = hba->max_rqes; 1166 1167 setup_qp_page_tables(ep); 1168 1169 return 0; 1170 1171 mem_alloc_err: 1172 bnx2i_free_qp_resc(hba, ep); 1173 return -ENOMEM; 1174 } 1175 1176 1177 1178 /** 1179 * bnx2i_free_qp_resc - free memory resources held by QP 1180 * @hba: adapter structure pointer 1181 * @ep: endpoint (transport identifier) structure 1182 * 1183 * Free QP resources - SQ/RQ/CQ memory and page tables. 1184 */ 1185 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1186 { 1187 if (ep->qp.ctx_base) { 1188 iounmap(ep->qp.ctx_base); 1189 ep->qp.ctx_base = NULL; 1190 } 1191 /* Free SQ mem */ 1192 if (ep->qp.sq_pgtbl_virt) { 1193 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1194 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1195 ep->qp.sq_pgtbl_virt = NULL; 1196 ep->qp.sq_pgtbl_phys = 0; 1197 } 1198 if (ep->qp.sq_virt) { 1199 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1200 ep->qp.sq_virt, ep->qp.sq_phys); 1201 ep->qp.sq_virt = NULL; 1202 ep->qp.sq_phys = 0; 1203 } 1204 1205 /* Free RQ mem */ 1206 if (ep->qp.rq_pgtbl_virt) { 1207 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1208 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1209 ep->qp.rq_pgtbl_virt = NULL; 1210 ep->qp.rq_pgtbl_phys = 0; 1211 } 1212 if (ep->qp.rq_virt) { 1213 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1214 ep->qp.rq_virt, ep->qp.rq_phys); 1215 ep->qp.rq_virt = NULL; 1216 ep->qp.rq_phys = 0; 1217 } 1218 1219 /* Free CQ mem */ 1220 if (ep->qp.cq_pgtbl_virt) { 1221 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1222 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1223 ep->qp.cq_pgtbl_virt = NULL; 1224 ep->qp.cq_pgtbl_phys = 0; 1225 } 1226 if (ep->qp.cq_virt) { 1227 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1228 ep->qp.cq_virt, ep->qp.cq_phys); 1229 ep->qp.cq_virt = NULL; 1230 ep->qp.cq_phys = 0; 1231 } 1232 } 1233 1234 1235 /** 1236 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1237 * @hba: adapter structure pointer 1238 * 1239 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1240 * This results in iSCSi support validation and on-chip context manager 1241 * initialization. Firmware completes this handshake with a CQE carrying 1242 * the result of iscsi support validation. Parameter carried by 1243 * iscsi init request determines the number of offloaded connection and 1244 * tolerance level for iscsi protocol violation this hba/chip can support 1245 */ 1246 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1247 { 1248 struct kwqe *kwqe_arr[3]; 1249 struct iscsi_kwqe_init1 iscsi_init; 1250 struct iscsi_kwqe_init2 iscsi_init2; 1251 int rc = 0; 1252 u64 mask64; 1253 1254 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1)); 1255 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2)); 1256 1257 bnx2i_adjust_qp_size(hba); 1258 1259 iscsi_init.flags = 1260 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1261 if (en_tcp_dack) 1262 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1263 iscsi_init.reserved0 = 0; 1264 iscsi_init.num_cqs = 1; 1265 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1266 iscsi_init.hdr.flags = 1267 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1268 1269 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1270 iscsi_init.dummy_buffer_addr_hi = 1271 (u32) ((u64) hba->dummy_buf_dma >> 32); 1272 1273 hba->num_ccell = hba->max_sqes >> 1; 1274 hba->ctx_ccell_tasks = 1275 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1276 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1277 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1278 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1279 iscsi_init.sq_num_wqes = hba->max_sqes; 1280 iscsi_init.cq_log_wqes_per_page = 1281 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE); 1282 iscsi_init.cq_num_wqes = hba->max_cqes; 1283 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1284 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1285 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1286 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; 1287 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1288 iscsi_init.rq_num_wqes = hba->max_rqes; 1289 1290 1291 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1292 iscsi_init2.hdr.flags = 1293 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1294 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1295 mask64 = 0x0ULL; 1296 mask64 |= ( 1297 /* CISCO MDS */ 1298 (1UL << 1299 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1300 /* HP MSA1510i */ 1301 (1UL << 1302 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1303 /* EMC */ 1304 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1305 if (error_mask1) { 1306 iscsi_init2.error_bit_map[0] = error_mask1; 1307 mask64 ^= (u32)(mask64); 1308 mask64 |= error_mask1; 1309 } else 1310 iscsi_init2.error_bit_map[0] = (u32) mask64; 1311 1312 if (error_mask2) { 1313 iscsi_init2.error_bit_map[1] = error_mask2; 1314 mask64 &= 0xffffffff; 1315 mask64 |= ((u64)error_mask2 << 32); 1316 } else 1317 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1318 1319 iscsi_error_mask = mask64; 1320 1321 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1322 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1323 1324 if (hba->cnic && hba->cnic->submit_kwqes) 1325 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1326 return rc; 1327 } 1328 1329 1330 /** 1331 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1332 * @session: iscsi session 1333 * @bnx2i_conn: bnx2i connection 1334 * @cqe: pointer to newly DMA'ed CQE entry for processing 1335 * 1336 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1337 */ 1338 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1339 struct bnx2i_conn *bnx2i_conn, 1340 struct cqe *cqe) 1341 { 1342 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1343 struct bnx2i_hba *hba = bnx2i_conn->hba; 1344 struct bnx2i_cmd_response *resp_cqe; 1345 struct bnx2i_cmd *bnx2i_cmd; 1346 struct iscsi_task *task; 1347 struct iscsi_scsi_rsp *hdr; 1348 u32 datalen = 0; 1349 1350 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1351 spin_lock_bh(&session->back_lock); 1352 task = iscsi_itt_to_task(conn, 1353 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1354 if (!task) 1355 goto fail; 1356 1357 bnx2i_cmd = task->dd_data; 1358 1359 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { 1360 conn->datain_pdus_cnt += 1361 resp_cqe->task_stat.read_stat.num_data_ins; 1362 conn->rxdata_octets += 1363 bnx2i_cmd->req.total_data_transfer_length; 1364 ADD_STATS_64(hba, rx_pdus, 1365 resp_cqe->task_stat.read_stat.num_data_ins); 1366 ADD_STATS_64(hba, rx_bytes, 1367 bnx2i_cmd->req.total_data_transfer_length); 1368 } else { 1369 conn->dataout_pdus_cnt += 1370 resp_cqe->task_stat.write_stat.num_data_outs; 1371 conn->r2t_pdus_cnt += 1372 resp_cqe->task_stat.write_stat.num_r2ts; 1373 conn->txdata_octets += 1374 bnx2i_cmd->req.total_data_transfer_length; 1375 ADD_STATS_64(hba, tx_pdus, 1376 resp_cqe->task_stat.write_stat.num_data_outs); 1377 ADD_STATS_64(hba, tx_bytes, 1378 bnx2i_cmd->req.total_data_transfer_length); 1379 ADD_STATS_64(hba, rx_pdus, 1380 resp_cqe->task_stat.write_stat.num_r2ts); 1381 } 1382 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1383 1384 hdr = (struct iscsi_scsi_rsp *)task->hdr; 1385 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1386 hdr->opcode = resp_cqe->op_code; 1387 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1388 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1389 hdr->response = resp_cqe->response; 1390 hdr->cmd_status = resp_cqe->status; 1391 hdr->flags = resp_cqe->response_flags; 1392 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1393 1394 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1395 goto done; 1396 1397 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1398 datalen = resp_cqe->data_length; 1399 if (datalen < 2) 1400 goto done; 1401 1402 if (datalen > BNX2I_RQ_WQE_SIZE) { 1403 iscsi_conn_printk(KERN_ERR, conn, 1404 "sense data len %d > RQ sz\n", 1405 datalen); 1406 datalen = BNX2I_RQ_WQE_SIZE; 1407 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1408 iscsi_conn_printk(KERN_ERR, conn, 1409 "sense data len %d > conn data\n", 1410 datalen); 1411 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1412 } 1413 1414 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1415 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1416 } 1417 1418 done: 1419 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1420 conn->data, datalen); 1421 fail: 1422 spin_unlock_bh(&session->back_lock); 1423 return 0; 1424 } 1425 1426 1427 /** 1428 * bnx2i_process_login_resp - this function handles iscsi login response 1429 * @session: iscsi session pointer 1430 * @bnx2i_conn: iscsi connection pointer 1431 * @cqe: pointer to newly DMA'ed CQE entry for processing 1432 * 1433 * process Login Response CQE & complete it to open-iscsi user daemon 1434 */ 1435 static int bnx2i_process_login_resp(struct iscsi_session *session, 1436 struct bnx2i_conn *bnx2i_conn, 1437 struct cqe *cqe) 1438 { 1439 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1440 struct iscsi_task *task; 1441 struct bnx2i_login_response *login; 1442 struct iscsi_login_rsp *resp_hdr; 1443 int pld_len; 1444 int pad_len; 1445 1446 login = (struct bnx2i_login_response *) cqe; 1447 spin_lock(&session->back_lock); 1448 task = iscsi_itt_to_task(conn, 1449 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1450 if (!task) 1451 goto done; 1452 1453 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1454 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1455 resp_hdr->opcode = login->op_code; 1456 resp_hdr->flags = login->response_flags; 1457 resp_hdr->max_version = login->version_max; 1458 resp_hdr->active_version = login->version_active; 1459 resp_hdr->hlength = 0; 1460 1461 hton24(resp_hdr->dlength, login->data_length); 1462 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1463 resp_hdr->tsih = cpu_to_be16(login->tsih); 1464 resp_hdr->itt = task->hdr->itt; 1465 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1466 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1467 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1468 resp_hdr->status_class = login->status_class; 1469 resp_hdr->status_detail = login->status_detail; 1470 pld_len = login->data_length; 1471 bnx2i_conn->gen_pdu.resp_wr_ptr = 1472 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1473 1474 pad_len = 0; 1475 if (pld_len & 0x3) 1476 pad_len = 4 - (pld_len % 4); 1477 1478 if (pad_len) { 1479 int i = 0; 1480 for (i = 0; i < pad_len; i++) { 1481 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1482 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1483 } 1484 } 1485 1486 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1487 bnx2i_conn->gen_pdu.resp_buf, 1488 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1489 done: 1490 spin_unlock(&session->back_lock); 1491 return 0; 1492 } 1493 1494 1495 /** 1496 * bnx2i_process_text_resp - this function handles iscsi text response 1497 * @session: iscsi session pointer 1498 * @bnx2i_conn: iscsi connection pointer 1499 * @cqe: pointer to newly DMA'ed CQE entry for processing 1500 * 1501 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon 1502 */ 1503 static int bnx2i_process_text_resp(struct iscsi_session *session, 1504 struct bnx2i_conn *bnx2i_conn, 1505 struct cqe *cqe) 1506 { 1507 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1508 struct iscsi_task *task; 1509 struct bnx2i_text_response *text; 1510 struct iscsi_text_rsp *resp_hdr; 1511 int pld_len; 1512 int pad_len; 1513 1514 text = (struct bnx2i_text_response *) cqe; 1515 spin_lock(&session->back_lock); 1516 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1517 if (!task) 1518 goto done; 1519 1520 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; 1521 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1522 resp_hdr->opcode = text->op_code; 1523 resp_hdr->flags = text->response_flags; 1524 resp_hdr->hlength = 0; 1525 1526 hton24(resp_hdr->dlength, text->data_length); 1527 resp_hdr->itt = task->hdr->itt; 1528 resp_hdr->ttt = cpu_to_be32(text->ttt); 1529 resp_hdr->statsn = task->hdr->exp_statsn; 1530 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); 1531 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); 1532 pld_len = text->data_length; 1533 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + 1534 pld_len; 1535 pad_len = 0; 1536 if (pld_len & 0x3) 1537 pad_len = 4 - (pld_len % 4); 1538 1539 if (pad_len) { 1540 int i = 0; 1541 for (i = 0; i < pad_len; i++) { 1542 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1543 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1544 } 1545 } 1546 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1547 bnx2i_conn->gen_pdu.resp_buf, 1548 bnx2i_conn->gen_pdu.resp_wr_ptr - 1549 bnx2i_conn->gen_pdu.resp_buf); 1550 done: 1551 spin_unlock(&session->back_lock); 1552 return 0; 1553 } 1554 1555 1556 /** 1557 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1558 * @session: iscsi session pointer 1559 * @bnx2i_conn: iscsi connection pointer 1560 * @cqe: pointer to newly DMA'ed CQE entry for processing 1561 * 1562 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1563 */ 1564 static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1565 struct bnx2i_conn *bnx2i_conn, 1566 struct cqe *cqe) 1567 { 1568 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1569 struct iscsi_task *task; 1570 struct bnx2i_tmf_response *tmf_cqe; 1571 struct iscsi_tm_rsp *resp_hdr; 1572 1573 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1574 spin_lock(&session->back_lock); 1575 task = iscsi_itt_to_task(conn, 1576 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1577 if (!task) 1578 goto done; 1579 1580 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1581 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1582 resp_hdr->opcode = tmf_cqe->op_code; 1583 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1584 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1585 resp_hdr->itt = task->hdr->itt; 1586 resp_hdr->response = tmf_cqe->response; 1587 1588 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1589 done: 1590 spin_unlock(&session->back_lock); 1591 return 0; 1592 } 1593 1594 /** 1595 * bnx2i_process_logout_resp - this function handles iscsi logout response 1596 * @session: iscsi session pointer 1597 * @bnx2i_conn: iscsi connection pointer 1598 * @cqe: pointer to newly DMA'ed CQE entry for processing 1599 * 1600 * process iSCSI Logout Response CQE & make function call to 1601 * notify the user daemon. 1602 */ 1603 static int bnx2i_process_logout_resp(struct iscsi_session *session, 1604 struct bnx2i_conn *bnx2i_conn, 1605 struct cqe *cqe) 1606 { 1607 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1608 struct iscsi_task *task; 1609 struct bnx2i_logout_response *logout; 1610 struct iscsi_logout_rsp *resp_hdr; 1611 1612 logout = (struct bnx2i_logout_response *) cqe; 1613 spin_lock(&session->back_lock); 1614 task = iscsi_itt_to_task(conn, 1615 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1616 if (!task) 1617 goto done; 1618 1619 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1620 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1621 resp_hdr->opcode = logout->op_code; 1622 resp_hdr->flags = logout->response; 1623 resp_hdr->hlength = 0; 1624 1625 resp_hdr->itt = task->hdr->itt; 1626 resp_hdr->statsn = task->hdr->exp_statsn; 1627 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1628 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1629 1630 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1631 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1632 1633 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1634 1635 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1636 done: 1637 spin_unlock(&session->back_lock); 1638 return 0; 1639 } 1640 1641 /** 1642 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1643 * @session: iscsi session pointer 1644 * @bnx2i_conn: iscsi connection pointer 1645 * @cqe: pointer to newly DMA'ed CQE entry for processing 1646 * 1647 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1648 */ 1649 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1650 struct bnx2i_conn *bnx2i_conn, 1651 struct cqe *cqe) 1652 { 1653 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1654 struct bnx2i_nop_in_msg *nop_in; 1655 struct iscsi_task *task; 1656 1657 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1658 spin_lock(&session->back_lock); 1659 task = iscsi_itt_to_task(conn, 1660 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1661 if (task) 1662 __iscsi_put_task(task); 1663 spin_unlock(&session->back_lock); 1664 } 1665 1666 /** 1667 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1668 * @conn: iscsi connection 1669 * 1670 * Firmware advances RQ producer index for every unsolicited PDU even if 1671 * payload data length is '0'. This function makes corresponding 1672 * adjustments on the driver side to match this f/w behavior 1673 */ 1674 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1675 { 1676 char dummy_rq_data[2]; 1677 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1678 bnx2i_put_rq_buf(bnx2i_conn, 1); 1679 } 1680 1681 1682 /** 1683 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1684 * @session: iscsi session pointer 1685 * @bnx2i_conn: iscsi connection pointer 1686 * @cqe: pointer to newly DMA'ed CQE entry for processing 1687 * 1688 * process iSCSI target's proactive iSCSI NOPIN request 1689 */ 1690 static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1691 struct bnx2i_conn *bnx2i_conn, 1692 struct cqe *cqe) 1693 { 1694 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1695 struct iscsi_task *task; 1696 struct bnx2i_nop_in_msg *nop_in; 1697 struct iscsi_nopin *hdr; 1698 int tgt_async_nop = 0; 1699 1700 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1701 1702 spin_lock(&session->back_lock); 1703 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1704 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1705 hdr->opcode = nop_in->op_code; 1706 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1707 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1708 hdr->ttt = cpu_to_be32(nop_in->ttt); 1709 1710 if (nop_in->itt == (u16) RESERVED_ITT) { 1711 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1712 hdr->itt = RESERVED_ITT; 1713 tgt_async_nop = 1; 1714 goto done; 1715 } 1716 1717 /* this is a response to one of our nop-outs */ 1718 task = iscsi_itt_to_task(conn, 1719 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1720 if (task) { 1721 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1722 hdr->itt = task->hdr->itt; 1723 hdr->ttt = cpu_to_be32(nop_in->ttt); 1724 memcpy(&hdr->lun, nop_in->lun, 8); 1725 } 1726 done: 1727 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1728 spin_unlock(&session->back_lock); 1729 1730 return tgt_async_nop; 1731 } 1732 1733 1734 /** 1735 * bnx2i_process_async_mesg - this function handles iscsi async message 1736 * @session: iscsi session pointer 1737 * @bnx2i_conn: iscsi connection pointer 1738 * @cqe: pointer to newly DMA'ed CQE entry for processing 1739 * 1740 * process iSCSI ASYNC Message 1741 */ 1742 static void bnx2i_process_async_mesg(struct iscsi_session *session, 1743 struct bnx2i_conn *bnx2i_conn, 1744 struct cqe *cqe) 1745 { 1746 struct bnx2i_async_msg *async_cqe; 1747 struct iscsi_async *resp_hdr; 1748 u8 async_event; 1749 1750 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1751 1752 async_cqe = (struct bnx2i_async_msg *)cqe; 1753 async_event = async_cqe->async_event; 1754 1755 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1756 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1757 "async: scsi events not supported\n"); 1758 return; 1759 } 1760 1761 spin_lock(&session->back_lock); 1762 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1763 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1764 resp_hdr->opcode = async_cqe->op_code; 1765 resp_hdr->flags = 0x80; 1766 1767 memcpy(&resp_hdr->lun, async_cqe->lun, 8); 1768 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1769 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1770 1771 resp_hdr->async_event = async_cqe->async_event; 1772 resp_hdr->async_vcode = async_cqe->async_vcode; 1773 1774 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1775 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1776 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1777 1778 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1779 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1780 spin_unlock(&session->back_lock); 1781 } 1782 1783 1784 /** 1785 * bnx2i_process_reject_mesg - process iscsi reject pdu 1786 * @session: iscsi session pointer 1787 * @bnx2i_conn: iscsi connection pointer 1788 * @cqe: pointer to newly DMA'ed CQE entry for processing 1789 * 1790 * process iSCSI REJECT message 1791 */ 1792 static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1793 struct bnx2i_conn *bnx2i_conn, 1794 struct cqe *cqe) 1795 { 1796 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1797 struct bnx2i_reject_msg *reject; 1798 struct iscsi_reject *hdr; 1799 1800 reject = (struct bnx2i_reject_msg *) cqe; 1801 if (reject->data_length) { 1802 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1803 bnx2i_put_rq_buf(bnx2i_conn, 1); 1804 } else 1805 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1806 1807 spin_lock(&session->back_lock); 1808 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1809 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1810 hdr->opcode = reject->op_code; 1811 hdr->reason = reject->reason; 1812 hton24(hdr->dlength, reject->data_length); 1813 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1814 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1815 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1816 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1817 reject->data_length); 1818 spin_unlock(&session->back_lock); 1819 } 1820 1821 /** 1822 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1823 * @session: iscsi session pointer 1824 * @bnx2i_conn: iscsi connection pointer 1825 * @cqe: pointer to newly DMA'ed CQE entry for processing 1826 * 1827 * process command cleanup response CQE during conn shutdown or error recovery 1828 */ 1829 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1830 struct bnx2i_conn *bnx2i_conn, 1831 struct cqe *cqe) 1832 { 1833 struct bnx2i_cleanup_response *cmd_clean_rsp; 1834 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1835 struct iscsi_task *task; 1836 1837 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1838 spin_lock(&session->back_lock); 1839 task = iscsi_itt_to_task(conn, 1840 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1841 if (!task) 1842 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1843 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1844 spin_unlock(&session->back_lock); 1845 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1846 } 1847 1848 1849 /** 1850 * bnx2i_percpu_io_thread - thread per cpu for ios 1851 * 1852 * @arg: ptr to bnx2i_percpu_info structure 1853 */ 1854 int bnx2i_percpu_io_thread(void *arg) 1855 { 1856 struct bnx2i_percpu_s *p = arg; 1857 struct bnx2i_work *work, *tmp; 1858 LIST_HEAD(work_list); 1859 1860 set_user_nice(current, MIN_NICE); 1861 1862 while (!kthread_should_stop()) { 1863 spin_lock_bh(&p->p_work_lock); 1864 while (!list_empty(&p->work_list)) { 1865 list_splice_init(&p->work_list, &work_list); 1866 spin_unlock_bh(&p->p_work_lock); 1867 1868 list_for_each_entry_safe(work, tmp, &work_list, list) { 1869 list_del_init(&work->list); 1870 /* work allocated in the bh, freed here */ 1871 bnx2i_process_scsi_cmd_resp(work->session, 1872 work->bnx2i_conn, 1873 &work->cqe); 1874 atomic_dec(&work->bnx2i_conn->work_cnt); 1875 kfree(work); 1876 } 1877 spin_lock_bh(&p->p_work_lock); 1878 } 1879 set_current_state(TASK_INTERRUPTIBLE); 1880 spin_unlock_bh(&p->p_work_lock); 1881 schedule(); 1882 } 1883 __set_current_state(TASK_RUNNING); 1884 1885 return 0; 1886 } 1887 1888 1889 /** 1890 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread 1891 * @bnx2i_conn: bnx2i connection 1892 * 1893 * this function is called by generic KCQ handler to queue all pending cmd 1894 * completion CQEs 1895 * 1896 * The implementation is to queue the cmd response based on the 1897 * last recorded command for the given connection. The 1898 * cpu_id gets recorded upon task_xmit. No out-of-order completion! 1899 */ 1900 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, 1901 struct bnx2i_conn *bnx2i_conn, 1902 struct bnx2i_nop_in_msg *cqe) 1903 { 1904 struct bnx2i_work *bnx2i_work = NULL; 1905 struct bnx2i_percpu_s *p = NULL; 1906 struct iscsi_task *task; 1907 struct scsi_cmnd *sc; 1908 int rc = 0; 1909 int cpu; 1910 1911 spin_lock(&session->back_lock); 1912 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, 1913 cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1914 if (!task || !task->sc) { 1915 spin_unlock(&session->back_lock); 1916 return -EINVAL; 1917 } 1918 sc = task->sc; 1919 1920 if (!blk_rq_cpu_valid(sc->request)) 1921 cpu = smp_processor_id(); 1922 else 1923 cpu = sc->request->cpu; 1924 1925 spin_unlock(&session->back_lock); 1926 1927 p = &per_cpu(bnx2i_percpu, cpu); 1928 spin_lock(&p->p_work_lock); 1929 if (unlikely(!p->iothread)) { 1930 rc = -EINVAL; 1931 goto err; 1932 } 1933 /* Alloc and copy to the cqe */ 1934 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC); 1935 if (bnx2i_work) { 1936 INIT_LIST_HEAD(&bnx2i_work->list); 1937 bnx2i_work->session = session; 1938 bnx2i_work->bnx2i_conn = bnx2i_conn; 1939 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe)); 1940 list_add_tail(&bnx2i_work->list, &p->work_list); 1941 atomic_inc(&bnx2i_conn->work_cnt); 1942 wake_up_process(p->iothread); 1943 spin_unlock(&p->p_work_lock); 1944 goto done; 1945 } else 1946 rc = -ENOMEM; 1947 err: 1948 spin_unlock(&p->p_work_lock); 1949 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe); 1950 done: 1951 return rc; 1952 } 1953 1954 1955 /** 1956 * bnx2i_process_new_cqes - process newly DMA'ed CQE's 1957 * @bnx2i_conn: bnx2i connection 1958 * 1959 * this function is called by generic KCQ handler to process all pending CQE's 1960 */ 1961 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) 1962 { 1963 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1964 struct iscsi_session *session = conn->session; 1965 struct bnx2i_hba *hba = bnx2i_conn->hba; 1966 struct qp_info *qp; 1967 struct bnx2i_nop_in_msg *nopin; 1968 int tgt_async_msg; 1969 int cqe_cnt = 0; 1970 1971 if (bnx2i_conn->ep == NULL) 1972 return 0; 1973 1974 qp = &bnx2i_conn->ep->qp; 1975 1976 if (!qp->cq_virt) { 1977 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", 1978 hba->netdev->name); 1979 goto out; 1980 } 1981 while (1) { 1982 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1983 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1984 break; 1985 1986 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { 1987 if (nopin->op_code == ISCSI_OP_NOOP_IN && 1988 nopin->itt == (u16) RESERVED_ITT) { 1989 printk(KERN_ALERT "bnx2i: Unsolicited " 1990 "NOP-In detected for suspended " 1991 "connection dev=%s!\n", 1992 hba->netdev->name); 1993 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1994 goto cqe_out; 1995 } 1996 break; 1997 } 1998 tgt_async_msg = 0; 1999 2000 switch (nopin->op_code) { 2001 case ISCSI_OP_SCSI_CMD_RSP: 2002 case ISCSI_OP_SCSI_DATA_IN: 2003 /* Run the kthread engine only for data cmds 2004 All other cmds will be completed in this bh! */ 2005 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); 2006 goto done; 2007 case ISCSI_OP_LOGIN_RSP: 2008 bnx2i_process_login_resp(session, bnx2i_conn, 2009 qp->cq_cons_qe); 2010 break; 2011 case ISCSI_OP_SCSI_TMFUNC_RSP: 2012 bnx2i_process_tmf_resp(session, bnx2i_conn, 2013 qp->cq_cons_qe); 2014 break; 2015 case ISCSI_OP_TEXT_RSP: 2016 bnx2i_process_text_resp(session, bnx2i_conn, 2017 qp->cq_cons_qe); 2018 break; 2019 case ISCSI_OP_LOGOUT_RSP: 2020 bnx2i_process_logout_resp(session, bnx2i_conn, 2021 qp->cq_cons_qe); 2022 break; 2023 case ISCSI_OP_NOOP_IN: 2024 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 2025 qp->cq_cons_qe)) 2026 tgt_async_msg = 1; 2027 break; 2028 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 2029 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 2030 qp->cq_cons_qe); 2031 break; 2032 case ISCSI_OP_ASYNC_EVENT: 2033 bnx2i_process_async_mesg(session, bnx2i_conn, 2034 qp->cq_cons_qe); 2035 tgt_async_msg = 1; 2036 break; 2037 case ISCSI_OP_REJECT: 2038 bnx2i_process_reject_mesg(session, bnx2i_conn, 2039 qp->cq_cons_qe); 2040 break; 2041 case ISCSI_OPCODE_CLEANUP_RESPONSE: 2042 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 2043 qp->cq_cons_qe); 2044 break; 2045 default: 2046 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2047 nopin->op_code); 2048 } 2049 2050 ADD_STATS_64(hba, rx_pdus, 1); 2051 ADD_STATS_64(hba, rx_bytes, nopin->data_length); 2052 done: 2053 if (!tgt_async_msg) { 2054 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) 2055 printk(KERN_ALERT "bnx2i (%s): no active cmd! " 2056 "op 0x%x\n", 2057 hba->netdev->name, 2058 nopin->op_code); 2059 else 2060 atomic_dec(&bnx2i_conn->ep->num_active_cmds); 2061 } 2062 cqe_out: 2063 /* clear out in production version only, till beta keep opcode 2064 * field intact, will be helpful in debugging (context dump) 2065 * nopin->op_code = 0; 2066 */ 2067 cqe_cnt++; 2068 qp->cqe_exp_seq_sn++; 2069 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 2070 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 2071 2072 if (qp->cq_cons_qe == qp->cq_last_qe) { 2073 qp->cq_cons_qe = qp->cq_first_qe; 2074 qp->cq_cons_idx = 0; 2075 } else { 2076 qp->cq_cons_qe++; 2077 qp->cq_cons_idx++; 2078 } 2079 } 2080 out: 2081 return cqe_cnt; 2082 } 2083 2084 /** 2085 * bnx2i_fastpath_notification - process global event queue (KCQ) 2086 * @hba: adapter structure pointer 2087 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 2088 * 2089 * Fast path event notification handler, KCQ entry carries context id 2090 * of the connection that has 1 or more pending CQ entries 2091 */ 2092 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 2093 struct iscsi_kcqe *new_cqe_kcqe) 2094 { 2095 struct bnx2i_conn *bnx2i_conn; 2096 u32 iscsi_cid; 2097 int nxt_idx; 2098 2099 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 2100 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2101 2102 if (!bnx2i_conn) { 2103 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 2104 return; 2105 } 2106 if (!bnx2i_conn->ep) { 2107 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 2108 return; 2109 } 2110 2111 bnx2i_process_new_cqes(bnx2i_conn); 2112 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, 2113 CNIC_ARM_CQE_FP); 2114 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) 2115 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); 2116 } 2117 2118 2119 /** 2120 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 2121 * @hba: adapter structure pointer 2122 * @update_kcqe: kcqe pointer 2123 * 2124 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 2125 */ 2126 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 2127 struct iscsi_kcqe *update_kcqe) 2128 { 2129 struct bnx2i_conn *conn; 2130 u32 iscsi_cid; 2131 2132 iscsi_cid = update_kcqe->iscsi_conn_id; 2133 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2134 2135 if (!conn) { 2136 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 2137 return; 2138 } 2139 if (!conn->ep) { 2140 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 2141 return; 2142 } 2143 2144 if (update_kcqe->completion_status) { 2145 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 2146 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 2147 } else 2148 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 2149 2150 wake_up_interruptible(&conn->ep->ofld_wait); 2151 } 2152 2153 2154 /** 2155 * bnx2i_recovery_que_add_conn - add connection to recovery queue 2156 * @hba: adapter structure pointer 2157 * @bnx2i_conn: iscsi connection 2158 * 2159 * Add connection to recovery queue and schedule adapter eh worker 2160 */ 2161 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 2162 struct bnx2i_conn *bnx2i_conn) 2163 { 2164 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 2165 ISCSI_ERR_CONN_FAILED); 2166 } 2167 2168 2169 /** 2170 * bnx2i_process_tcp_error - process error notification on a given connection 2171 * 2172 * @hba: adapter structure pointer 2173 * @tcp_err: tcp error kcqe pointer 2174 * 2175 * handles tcp level error notifications from FW. 2176 */ 2177 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 2178 struct iscsi_kcqe *tcp_err) 2179 { 2180 struct bnx2i_conn *bnx2i_conn; 2181 u32 iscsi_cid; 2182 2183 iscsi_cid = tcp_err->iscsi_conn_id; 2184 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2185 2186 if (!bnx2i_conn) { 2187 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2188 return; 2189 } 2190 2191 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 2192 iscsi_cid, tcp_err->completion_status); 2193 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2194 } 2195 2196 2197 /** 2198 * bnx2i_process_iscsi_error - process error notification on a given connection 2199 * @hba: adapter structure pointer 2200 * @iscsi_err: iscsi error kcqe pointer 2201 * 2202 * handles iscsi error notifications from the FW. Firmware based in initial 2203 * handshake classifies iscsi protocol / TCP rfc violation into either 2204 * warning or error indications. If indication is of "Error" type, driver 2205 * will initiate session recovery for that connection/session. For 2206 * "Warning" type indication, driver will put out a system log message 2207 * (there will be only one message for each type for the life of the 2208 * session, this is to avoid un-necessarily overloading the system) 2209 */ 2210 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 2211 struct iscsi_kcqe *iscsi_err) 2212 { 2213 struct bnx2i_conn *bnx2i_conn; 2214 u32 iscsi_cid; 2215 char warn_notice[] = "iscsi_warning"; 2216 char error_notice[] = "iscsi_error"; 2217 char additional_notice[64]; 2218 char *message; 2219 int need_recovery; 2220 u64 err_mask64; 2221 2222 iscsi_cid = iscsi_err->iscsi_conn_id; 2223 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2224 if (!bnx2i_conn) { 2225 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2226 return; 2227 } 2228 2229 err_mask64 = (0x1ULL << iscsi_err->completion_status); 2230 2231 if (err_mask64 & iscsi_error_mask) { 2232 need_recovery = 0; 2233 message = warn_notice; 2234 } else { 2235 need_recovery = 1; 2236 message = error_notice; 2237 } 2238 2239 switch (iscsi_err->completion_status) { 2240 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 2241 strcpy(additional_notice, "hdr digest err"); 2242 break; 2243 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 2244 strcpy(additional_notice, "data digest err"); 2245 break; 2246 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 2247 strcpy(additional_notice, "wrong opcode rcvd"); 2248 break; 2249 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 2250 strcpy(additional_notice, "AHS len > 0 rcvd"); 2251 break; 2252 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 2253 strcpy(additional_notice, "invalid ITT rcvd"); 2254 break; 2255 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 2256 strcpy(additional_notice, "wrong StatSN rcvd"); 2257 break; 2258 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 2259 strcpy(additional_notice, "wrong DataSN rcvd"); 2260 break; 2261 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 2262 strcpy(additional_notice, "pend R2T violation"); 2263 break; 2264 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 2265 strcpy(additional_notice, "ERL0, UO"); 2266 break; 2267 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2268 strcpy(additional_notice, "ERL0, U1"); 2269 break; 2270 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2271 strcpy(additional_notice, "ERL0, U2"); 2272 break; 2273 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2274 strcpy(additional_notice, "ERL0, U3"); 2275 break; 2276 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2277 strcpy(additional_notice, "ERL0, U4"); 2278 break; 2279 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2280 strcpy(additional_notice, "ERL0, U5"); 2281 break; 2282 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2283 strcpy(additional_notice, "ERL0, U6"); 2284 break; 2285 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2286 strcpy(additional_notice, "invalid resi len"); 2287 break; 2288 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2289 strcpy(additional_notice, "MRDSL violation"); 2290 break; 2291 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2292 strcpy(additional_notice, "F-bit not set"); 2293 break; 2294 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2295 strcpy(additional_notice, "invalid TTT"); 2296 break; 2297 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2298 strcpy(additional_notice, "invalid DataSN"); 2299 break; 2300 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2301 strcpy(additional_notice, "burst len violation"); 2302 break; 2303 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2304 strcpy(additional_notice, "buf offset violation"); 2305 break; 2306 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2307 strcpy(additional_notice, "invalid LUN field"); 2308 break; 2309 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2310 strcpy(additional_notice, "invalid R2TSN field"); 2311 break; 2312 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2313 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2314 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2315 strcpy(additional_notice, "invalid cmd len1"); 2316 break; 2317 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2318 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2319 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2320 strcpy(additional_notice, "invalid cmd len2"); 2321 break; 2322 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2323 strcpy(additional_notice, 2324 "pend r2t exceeds MaxOutstandingR2T value"); 2325 break; 2326 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2327 strcpy(additional_notice, "TTT is rsvd"); 2328 break; 2329 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2330 strcpy(additional_notice, "MBL violation"); 2331 break; 2332 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2333 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2334 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2335 strcpy(additional_notice, "data seg len != 0"); 2336 break; 2337 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2338 strcpy(additional_notice, "reject pdu len error"); 2339 break; 2340 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2341 strcpy(additional_notice, "async pdu len error"); 2342 break; 2343 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2344 strcpy(additional_notice, "nopin pdu len error"); 2345 break; 2346 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2347 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2348 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2349 strcpy(additional_notice, "pend r2t in cleanup"); 2350 break; 2351 2352 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2353 strcpy(additional_notice, "IP fragments rcvd"); 2354 break; 2355 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2356 strcpy(additional_notice, "IP options error"); 2357 break; 2358 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2359 strcpy(additional_notice, "urgent flag error"); 2360 break; 2361 default: 2362 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2363 iscsi_err->completion_status); 2364 } 2365 2366 if (need_recovery) { 2367 iscsi_conn_printk(KERN_ALERT, 2368 bnx2i_conn->cls_conn->dd_data, 2369 "bnx2i: %s - %s\n", 2370 message, additional_notice); 2371 2372 iscsi_conn_printk(KERN_ALERT, 2373 bnx2i_conn->cls_conn->dd_data, 2374 "conn_err - hostno %d conn %p, " 2375 "iscsi_cid %x cid %x\n", 2376 bnx2i_conn->hba->shost->host_no, 2377 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2378 bnx2i_conn->ep->ep_cid); 2379 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2380 } else 2381 if (!test_and_set_bit(iscsi_err->completion_status, 2382 (void *) &bnx2i_conn->violation_notified)) 2383 iscsi_conn_printk(KERN_ALERT, 2384 bnx2i_conn->cls_conn->dd_data, 2385 "bnx2i: %s - %s\n", 2386 message, additional_notice); 2387 } 2388 2389 2390 /** 2391 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2392 * @hba: adapter structure pointer 2393 * @conn_destroy: conn destroy kcqe pointer 2394 * 2395 * handles connection destroy completion request. 2396 */ 2397 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2398 struct iscsi_kcqe *conn_destroy) 2399 { 2400 struct bnx2i_endpoint *ep; 2401 2402 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2403 if (!ep) { 2404 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2405 "offload request, unexpected completion\n"); 2406 return; 2407 } 2408 2409 if (hba != ep->hba) { 2410 printk(KERN_ALERT "conn destroy- error hba mis-match\n"); 2411 return; 2412 } 2413 2414 if (conn_destroy->completion_status) { 2415 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2416 ep->state = EP_STATE_CLEANUP_FAILED; 2417 } else 2418 ep->state = EP_STATE_CLEANUP_CMPL; 2419 wake_up_interruptible(&ep->ofld_wait); 2420 } 2421 2422 2423 /** 2424 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2425 * @hba: adapter structure pointer 2426 * @ofld_kcqe: conn offload kcqe pointer 2427 * 2428 * handles initial connection offload completion, ep_connect() thread is 2429 * woken-up to continue with LLP connect process 2430 */ 2431 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2432 struct iscsi_kcqe *ofld_kcqe) 2433 { 2434 u32 cid_addr; 2435 struct bnx2i_endpoint *ep; 2436 u32 cid_num; 2437 2438 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2439 if (!ep) { 2440 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2441 return; 2442 } 2443 2444 if (hba != ep->hba) { 2445 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n"); 2446 return; 2447 } 2448 2449 if (ofld_kcqe->completion_status) { 2450 ep->state = EP_STATE_OFLD_FAILED; 2451 if (ofld_kcqe->completion_status == 2452 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2453 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2454 "to allocate iSCSI context resources\n", 2455 hba->netdev->name); 2456 else if (ofld_kcqe->completion_status == 2457 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2458 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2459 "opcode\n", hba->netdev->name); 2460 else if (ofld_kcqe->completion_status == 2461 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2462 /* error status code valid only for 5771x chipset */ 2463 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2464 else 2465 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2466 "error code %d\n", hba->netdev->name, 2467 ofld_kcqe->completion_status); 2468 } else { 2469 ep->state = EP_STATE_OFLD_COMPL; 2470 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2471 cid_num = bnx2i_get_cid_num(ep); 2472 ep->ep_cid = cid_addr; 2473 ep->qp.ctx_base = NULL; 2474 } 2475 wake_up_interruptible(&ep->ofld_wait); 2476 } 2477 2478 /** 2479 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE 2480 * @hba: adapter structure pointer 2481 * @update_kcqe: kcqe pointer 2482 * 2483 * Generic KCQ event handler/dispatcher 2484 */ 2485 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2486 u32 num_cqe) 2487 { 2488 struct bnx2i_hba *hba = context; 2489 int i = 0; 2490 struct iscsi_kcqe *ikcqe = NULL; 2491 2492 while (i < num_cqe) { 2493 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2494 2495 if (ikcqe->op_code == 2496 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2497 bnx2i_fastpath_notification(hba, ikcqe); 2498 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2499 bnx2i_process_ofld_cmpl(hba, ikcqe); 2500 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2501 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2502 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2503 if (ikcqe->completion_status != 2504 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2505 bnx2i_iscsi_license_error(hba, ikcqe->\ 2506 completion_status); 2507 else { 2508 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2509 bnx2i_get_link_state(hba); 2510 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2511 "ISCSI_INIT passed\n", 2512 (u8)hba->pcidev->bus->number, 2513 hba->pci_devno, 2514 (u8)hba->pci_func); 2515 2516 2517 } 2518 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2519 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2520 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2521 bnx2i_process_iscsi_error(hba, ikcqe); 2522 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2523 bnx2i_process_tcp_error(hba, ikcqe); 2524 else 2525 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2526 ikcqe->op_code); 2527 } 2528 } 2529 2530 2531 /** 2532 * bnx2i_indicate_netevent - Generic netdev event handler 2533 * @context: adapter structure pointer 2534 * @event: event type 2535 * @vlan_id: vlans id - associated vlan id with this event 2536 * 2537 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2538 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2539 */ 2540 static void bnx2i_indicate_netevent(void *context, unsigned long event, 2541 u16 vlan_id) 2542 { 2543 struct bnx2i_hba *hba = context; 2544 2545 /* Ignore all netevent coming from vlans */ 2546 if (vlan_id != 0) 2547 return; 2548 2549 switch (event) { 2550 case NETDEV_UP: 2551 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2552 bnx2i_send_fw_iscsi_init_msg(hba); 2553 break; 2554 case NETDEV_DOWN: 2555 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2556 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2557 break; 2558 case NETDEV_GOING_DOWN: 2559 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2560 iscsi_host_for_each_session(hba->shost, 2561 bnx2i_drop_session); 2562 break; 2563 case NETDEV_CHANGE: 2564 bnx2i_get_link_state(hba); 2565 break; 2566 default: 2567 ; 2568 } 2569 } 2570 2571 2572 /** 2573 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2574 * @cm_sk: cnic sock structure pointer 2575 * 2576 * function callback exported via bnx2i - cnic driver interface to 2577 * indicate completion of option-2 TCP connect request. 2578 */ 2579 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2580 { 2581 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2582 2583 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2584 ep->state = EP_STATE_CONNECT_FAILED; 2585 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2586 ep->state = EP_STATE_CONNECT_COMPL; 2587 else 2588 ep->state = EP_STATE_CONNECT_FAILED; 2589 2590 wake_up_interruptible(&ep->ofld_wait); 2591 } 2592 2593 2594 /** 2595 * bnx2i_cm_close_cmpl - process tcp conn close completion 2596 * @cm_sk: cnic sock structure pointer 2597 * 2598 * function callback exported via bnx2i - cnic driver interface to 2599 * indicate completion of option-2 graceful TCP connect shutdown 2600 */ 2601 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2602 { 2603 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2604 2605 ep->state = EP_STATE_DISCONN_COMPL; 2606 wake_up_interruptible(&ep->ofld_wait); 2607 } 2608 2609 2610 /** 2611 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2612 * @cm_sk: cnic sock structure pointer 2613 * 2614 * function callback exported via bnx2i - cnic driver interface to 2615 * indicate completion of option-2 abortive TCP connect termination 2616 */ 2617 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2618 { 2619 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2620 2621 ep->state = EP_STATE_DISCONN_COMPL; 2622 wake_up_interruptible(&ep->ofld_wait); 2623 } 2624 2625 2626 /** 2627 * bnx2i_cm_remote_close - process received TCP FIN 2628 * @hba: adapter structure pointer 2629 * @update_kcqe: kcqe pointer 2630 * 2631 * function callback exported via bnx2i - cnic driver interface to indicate 2632 * async TCP events such as FIN 2633 */ 2634 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2635 { 2636 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2637 2638 ep->state = EP_STATE_TCP_FIN_RCVD; 2639 if (ep->conn) 2640 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2641 } 2642 2643 /** 2644 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2645 * @hba: adapter structure pointer 2646 * @update_kcqe: kcqe pointer 2647 * 2648 * function callback exported via bnx2i - cnic driver interface to 2649 * indicate async TCP events (RST) sent by the peer. 2650 */ 2651 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2652 { 2653 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2654 u32 old_state = ep->state; 2655 2656 ep->state = EP_STATE_TCP_RST_RCVD; 2657 if (old_state == EP_STATE_DISCONN_START) 2658 wake_up_interruptible(&ep->ofld_wait); 2659 else 2660 if (ep->conn) 2661 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2662 } 2663 2664 2665 static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2666 char *buf, u16 buflen) 2667 { 2668 struct bnx2i_hba *hba = context; 2669 int rc; 2670 2671 if (!hba) 2672 return -ENODEV; 2673 2674 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2675 msg_type, buf, buflen); 2676 if (rc) 2677 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2678 2679 return rc; 2680 } 2681 2682 2683 /** 2684 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2685 * carrying callback function pointers 2686 * 2687 */ 2688 struct cnic_ulp_ops bnx2i_cnic_cb = { 2689 .cnic_init = bnx2i_ulp_init, 2690 .cnic_exit = bnx2i_ulp_exit, 2691 .cnic_start = bnx2i_start, 2692 .cnic_stop = bnx2i_stop, 2693 .indicate_kcqes = bnx2i_indicate_kcqe, 2694 .indicate_netevent = bnx2i_indicate_netevent, 2695 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2696 .cm_close_complete = bnx2i_cm_close_cmpl, 2697 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2698 .cm_remote_close = bnx2i_cm_remote_close, 2699 .cm_remote_abort = bnx2i_cm_remote_abort, 2700 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2701 .cnic_get_stats = bnx2i_get_stats, 2702 .owner = THIS_MODULE 2703 }; 2704 2705 2706 /** 2707 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2708 * @ep: bnx2i endpoint 2709 * 2710 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2711 * register in BAR #0. Whereas in 57710 these register are accessed by 2712 * mapping BAR #1 2713 */ 2714 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2715 { 2716 u32 cid_num; 2717 u32 reg_off; 2718 u32 first_l4l5; 2719 u32 ctx_sz; 2720 u32 config2; 2721 resource_size_t reg_base; 2722 2723 cid_num = bnx2i_get_cid_num(ep); 2724 2725 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2726 reg_base = pci_resource_start(ep->hba->pcidev, 2727 BNX2X_DOORBELL_PCI_BAR); 2728 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF); 2729 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4); 2730 if (!ep->qp.ctx_base) 2731 return -ENOMEM; 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