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