1 /* bnx2i_hwi.c: Broadcom 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 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation. 10 * 11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) 12 * Maintained by: Eddie Wai (eddie.wai@broadcom.com) 13 */ 14 15 #include <linux/gfp.h> 16 #include <scsi/scsi_tcq.h> 17 #include <scsi/libiscsi.h> 18 #include "bnx2i.h" 19 20 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); 21 22 /** 23 * bnx2i_get_cid_num - get cid from ep 24 * @ep: endpoint pointer 25 * 26 * Only applicable to 57710 family of devices 27 */ 28 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep) 29 { 30 u32 cid; 31 32 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 33 cid = ep->ep_cid; 34 else 35 cid = GET_CID_NUM(ep->ep_cid); 36 return cid; 37 } 38 39 40 /** 41 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type 42 * @hba: Adapter for which adjustments is to be made 43 * 44 * Only applicable to 57710 family of devices 45 */ 46 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba) 47 { 48 u32 num_elements_per_pg; 49 50 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) || 51 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) || 52 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 53 if (!is_power_of_2(hba->max_sqes)) 54 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes); 55 56 if (!is_power_of_2(hba->max_rqes)) 57 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes); 58 } 59 60 /* Adjust each queue size if the user selection does not 61 * yield integral num of page buffers 62 */ 63 /* adjust SQ */ 64 num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 65 if (hba->max_sqes < num_elements_per_pg) 66 hba->max_sqes = num_elements_per_pg; 67 else if (hba->max_sqes % num_elements_per_pg) 68 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) & 69 ~(num_elements_per_pg - 1); 70 71 /* adjust CQ */ 72 num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE; 73 if (hba->max_cqes < num_elements_per_pg) 74 hba->max_cqes = num_elements_per_pg; 75 else if (hba->max_cqes % num_elements_per_pg) 76 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) & 77 ~(num_elements_per_pg - 1); 78 79 /* adjust RQ */ 80 num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE; 81 if (hba->max_rqes < num_elements_per_pg) 82 hba->max_rqes = num_elements_per_pg; 83 else if (hba->max_rqes % num_elements_per_pg) 84 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) & 85 ~(num_elements_per_pg - 1); 86 } 87 88 89 /** 90 * bnx2i_get_link_state - get network interface link state 91 * @hba: adapter instance pointer 92 * 93 * updates adapter structure flag based on netdev state 94 */ 95 static void bnx2i_get_link_state(struct bnx2i_hba *hba) 96 { 97 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state)) 98 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 99 else 100 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 101 } 102 103 104 /** 105 * bnx2i_iscsi_license_error - displays iscsi license related error message 106 * @hba: adapter instance pointer 107 * @error_code: error classification 108 * 109 * Puts out an error log when driver is unable to offload iscsi connection 110 * due to license restrictions 111 */ 112 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code) 113 { 114 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED) 115 /* iSCSI offload not supported on this device */ 116 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n", 117 hba->netdev->name); 118 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED) 119 /* iSCSI offload not supported on this LOM device */ 120 printk(KERN_ERR "bnx2i: LOM is not enable to " 121 "offload iSCSI connections, dev=%s\n", 122 hba->netdev->name); 123 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state); 124 } 125 126 127 /** 128 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification 129 * @ep: endpoint (transport indentifier) structure 130 * @action: action, ARM or DISARM. For now only ARM_CQE is used 131 * 132 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt 133 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is 134 * outstanding and on chip timer expires 135 */ 136 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action) 137 { 138 struct bnx2i_5771x_cq_db *cq_db; 139 u16 cq_index; 140 u16 next_index = 0; 141 u32 num_active_cmds; 142 143 /* Coalesce CQ entries only on 10G devices */ 144 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 145 return 0; 146 147 /* Do not update CQ DB multiple times before firmware writes 148 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious 149 * interrupts and other unwanted results 150 */ 151 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 152 153 if (action != CNIC_ARM_CQE_FP) 154 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF) 155 return 0; 156 157 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) { 158 num_active_cmds = atomic_read(&ep->num_active_cmds); 159 if (num_active_cmds <= event_coal_min) 160 next_index = 1; 161 else { 162 next_index = num_active_cmds >> ep->ec_shift; 163 if (next_index > num_active_cmds - event_coal_min) 164 next_index = num_active_cmds - event_coal_min; 165 } 166 if (!next_index) 167 next_index = 1; 168 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1; 169 if (cq_index > ep->qp.cqe_size * 2) 170 cq_index -= ep->qp.cqe_size * 2; 171 if (!cq_index) 172 cq_index = 1; 173 174 cq_db->sqn[0] = cq_index; 175 } 176 return next_index; 177 } 178 179 180 /** 181 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer 182 * @conn: iscsi connection on which RQ event occurred 183 * @ptr: driver buffer to which RQ buffer contents is to 184 * be copied 185 * @len: length of valid data inside RQ buf 186 * 187 * Copies RQ buffer contents from shared (DMA'able) memory region to 188 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and 189 * scsi sense info 190 */ 191 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len) 192 { 193 if (!bnx2i_conn->ep->qp.rqe_left) 194 return; 195 196 bnx2i_conn->ep->qp.rqe_left--; 197 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len); 198 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) { 199 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe; 200 bnx2i_conn->ep->qp.rq_cons_idx = 0; 201 } else { 202 bnx2i_conn->ep->qp.rq_cons_qe++; 203 bnx2i_conn->ep->qp.rq_cons_idx++; 204 } 205 } 206 207 208 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) 209 { 210 struct bnx2i_5771x_dbell dbell; 211 u32 msg; 212 213 memset(&dbell, 0, sizeof(dbell)); 214 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << 215 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); 216 msg = *((u32 *)&dbell); 217 /* TODO : get doorbell register mapping */ 218 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); 219 } 220 221 222 /** 223 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell 224 * @conn: iscsi connection on which event to post 225 * @count: number of RQ buffer being posted to chip 226 * 227 * No need to ring hardware doorbell for 57710 family of devices 228 */ 229 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count) 230 { 231 struct bnx2i_5771x_sq_rq_db *rq_db; 232 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000); 233 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 234 235 ep->qp.rqe_left += count; 236 ep->qp.rq_prod_idx &= 0x7FFF; 237 ep->qp.rq_prod_idx += count; 238 239 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) { 240 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes; 241 if (!hi_bit) 242 ep->qp.rq_prod_idx |= 0x8000; 243 } else 244 ep->qp.rq_prod_idx |= hi_bit; 245 246 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 247 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt; 248 rq_db->prod_idx = ep->qp.rq_prod_idx; 249 /* no need to ring hardware doorbell for 57710 */ 250 } else { 251 writew(ep->qp.rq_prod_idx, 252 ep->qp.ctx_base + CNIC_RECV_DOORBELL); 253 } 254 mmiowb(); 255 } 256 257 258 /** 259 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine 260 * @conn: iscsi connection to which new SQ entries belong 261 * @count: number of SQ WQEs to post 262 * 263 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family 264 * of devices. For 5706/5708/5709 new SQ WQE count is written into the 265 * doorbell register 266 */ 267 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) 268 { 269 struct bnx2i_5771x_sq_rq_db *sq_db; 270 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 271 272 atomic_inc(&ep->num_active_cmds); 273 wmb(); /* flush SQ WQE memory before the doorbell is rung */ 274 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 275 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; 276 sq_db->prod_idx = ep->qp.sq_prod_idx; 277 bnx2i_ring_577xx_doorbell(bnx2i_conn); 278 } else 279 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); 280 281 mmiowb(); /* flush posted PCI writes */ 282 } 283 284 285 /** 286 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters 287 * @conn: iscsi connection to which new SQ entries belong 288 * @count: number of SQ WQEs to post 289 * 290 * this routine will update SQ driver parameters and ring the doorbell 291 */ 292 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, 293 int count) 294 { 295 int tmp_cnt; 296 297 if (count == 1) { 298 if (bnx2i_conn->ep->qp.sq_prod_qe == 299 bnx2i_conn->ep->qp.sq_last_qe) 300 bnx2i_conn->ep->qp.sq_prod_qe = 301 bnx2i_conn->ep->qp.sq_first_qe; 302 else 303 bnx2i_conn->ep->qp.sq_prod_qe++; 304 } else { 305 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= 306 bnx2i_conn->ep->qp.sq_last_qe) 307 bnx2i_conn->ep->qp.sq_prod_qe += count; 308 else { 309 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - 310 bnx2i_conn->ep->qp.sq_prod_qe; 311 bnx2i_conn->ep->qp.sq_prod_qe = 312 &bnx2i_conn->ep->qp.sq_first_qe[count - 313 (tmp_cnt + 1)]; 314 } 315 } 316 bnx2i_conn->ep->qp.sq_prod_idx += count; 317 /* Ring the doorbell */ 318 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); 319 } 320 321 322 /** 323 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware 324 * @conn: iscsi connection 325 * @cmd: driver command structure which is requesting 326 * a WQE to sent to chip for further processing 327 * 328 * prepare and post an iSCSI Login request WQE to CNIC firmware 329 */ 330 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, 331 struct iscsi_task *task) 332 { 333 struct bnx2i_cmd *bnx2i_cmd; 334 struct bnx2i_login_request *login_wqe; 335 struct iscsi_login_req *login_hdr; 336 u32 dword; 337 338 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 339 login_hdr = (struct iscsi_login_req *)task->hdr; 340 login_wqe = (struct bnx2i_login_request *) 341 bnx2i_conn->ep->qp.sq_prod_qe; 342 343 login_wqe->op_code = login_hdr->opcode; 344 login_wqe->op_attr = login_hdr->flags; 345 login_wqe->version_max = login_hdr->max_version; 346 login_wqe->version_min = login_hdr->min_version; 347 login_wqe->data_length = ntoh24(login_hdr->dlength); 348 login_wqe->isid_lo = *((u32 *) login_hdr->isid); 349 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2); 350 login_wqe->tsih = login_hdr->tsih; 351 login_wqe->itt = task->itt | 352 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT); 353 login_wqe->cid = login_hdr->cid; 354 355 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn); 356 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); 357 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN; 358 359 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 360 login_wqe->resp_bd_list_addr_hi = 361 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 362 363 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) | 364 (bnx2i_conn->gen_pdu.resp_buf_size << 365 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 366 login_wqe->resp_buffer = dword; 367 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 368 login_wqe->bd_list_addr_hi = 369 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 370 login_wqe->num_bds = 1; 371 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 372 373 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 374 return 0; 375 } 376 377 /** 378 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware 379 * @conn: iscsi connection 380 * @mtask: driver command structure which is requesting 381 * a WQE to sent to chip for further processing 382 * 383 * prepare and post an iSCSI Login request WQE to CNIC firmware 384 */ 385 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn, 386 struct iscsi_task *mtask) 387 { 388 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 389 struct iscsi_tm *tmfabort_hdr; 390 struct scsi_cmnd *ref_sc; 391 struct iscsi_task *ctask; 392 struct bnx2i_cmd *bnx2i_cmd; 393 struct bnx2i_tmf_request *tmfabort_wqe; 394 u32 dword; 395 u32 scsi_lun[2]; 396 397 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 398 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; 399 tmfabort_wqe = (struct bnx2i_tmf_request *) 400 bnx2i_conn->ep->qp.sq_prod_qe; 401 402 tmfabort_wqe->op_code = tmfabort_hdr->opcode; 403 tmfabort_wqe->op_attr = tmfabort_hdr->flags; 404 405 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); 406 tmfabort_wqe->reserved2 = 0; 407 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); 408 409 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { 410 case ISCSI_TM_FUNC_ABORT_TASK: 411 case ISCSI_TM_FUNC_TASK_REASSIGN: 412 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); 413 if (!ctask || !ctask->sc) 414 /* 415 * the iscsi layer must have completed the cmd while 416 * was starting up. 417 * 418 * Note: In the case of a SCSI cmd timeout, the task's 419 * sc is still active; hence ctask->sc != 0 420 * In this case, the task must be aborted 421 */ 422 return 0; 423 424 ref_sc = ctask->sc; 425 if (ref_sc->sc_data_direction == DMA_TO_DEVICE) 426 dword = (ISCSI_TASK_TYPE_WRITE << 427 ISCSI_CMD_REQUEST_TYPE_SHIFT); 428 else 429 dword = (ISCSI_TASK_TYPE_READ << 430 ISCSI_CMD_REQUEST_TYPE_SHIFT); 431 tmfabort_wqe->ref_itt = (dword | 432 (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); 433 break; 434 default: 435 tmfabort_wqe->ref_itt = RESERVED_ITT; 436 } 437 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun)); 438 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); 439 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); 440 441 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); 442 443 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 444 tmfabort_wqe->bd_list_addr_hi = (u32) 445 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 446 tmfabort_wqe->num_bds = 1; 447 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 448 449 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 450 return 0; 451 } 452 453 /** 454 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware 455 * @conn: iscsi connection 456 * @mtask: driver command structure which is requesting 457 * a WQE to sent to chip for further processing 458 * 459 * prepare and post an iSCSI Text request WQE to CNIC firmware 460 */ 461 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn, 462 struct iscsi_task *mtask) 463 { 464 struct bnx2i_cmd *bnx2i_cmd; 465 struct bnx2i_text_request *text_wqe; 466 struct iscsi_text *text_hdr; 467 u32 dword; 468 469 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 470 text_hdr = (struct iscsi_text *)mtask->hdr; 471 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe; 472 473 memset(text_wqe, 0, sizeof(struct bnx2i_text_request)); 474 475 text_wqe->op_code = text_hdr->opcode; 476 text_wqe->op_attr = text_hdr->flags; 477 text_wqe->data_length = ntoh24(text_hdr->dlength); 478 text_wqe->itt = mtask->itt | 479 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT); 480 text_wqe->ttt = be32_to_cpu(text_hdr->ttt); 481 482 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn); 483 484 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 485 text_wqe->resp_bd_list_addr_hi = 486 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 487 488 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) | 489 (bnx2i_conn->gen_pdu.resp_buf_size << 490 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 491 text_wqe->resp_buffer = dword; 492 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 493 text_wqe->bd_list_addr_hi = 494 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 495 text_wqe->num_bds = 1; 496 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 497 498 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 499 return 0; 500 } 501 502 503 /** 504 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware 505 * @conn: iscsi connection 506 * @cmd: driver command structure which is requesting 507 * a WQE to sent to chip for further processing 508 * 509 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware 510 */ 511 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, 512 struct bnx2i_cmd *cmd) 513 { 514 struct bnx2i_cmd_request *scsi_cmd_wqe; 515 516 scsi_cmd_wqe = (struct bnx2i_cmd_request *) 517 bnx2i_conn->ep->qp.sq_prod_qe; 518 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); 519 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 520 521 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 522 return 0; 523 } 524 525 /** 526 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware 527 * @conn: iscsi connection 528 * @cmd: driver command structure which is requesting 529 * a WQE to sent to chip for further processing 530 * @datap: payload buffer pointer 531 * @data_len: payload data length 532 * @unsol: indicated whether nopout pdu is unsolicited pdu or 533 * in response to target's NOPIN w/ TTT != FFFFFFFF 534 * 535 * prepare and post a nopout request WQE to CNIC firmware 536 */ 537 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, 538 struct iscsi_task *task, 539 char *datap, int data_len, int unsol) 540 { 541 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 542 struct bnx2i_cmd *bnx2i_cmd; 543 struct bnx2i_nop_out_request *nopout_wqe; 544 struct iscsi_nopout *nopout_hdr; 545 546 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 547 nopout_hdr = (struct iscsi_nopout *)task->hdr; 548 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; 549 550 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request)); 551 552 nopout_wqe->op_code = nopout_hdr->opcode; 553 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; 554 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8); 555 556 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 557 u32 tmp = nopout_wqe->lun[0]; 558 /* 57710 requires LUN field to be swapped */ 559 nopout_wqe->lun[0] = nopout_wqe->lun[1]; 560 nopout_wqe->lun[1] = tmp; 561 } 562 563 nopout_wqe->itt = ((u16)task->itt | 564 (ISCSI_TASK_TYPE_MPATH << 565 ISCSI_TMF_REQUEST_TYPE_SHIFT)); 566 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt); 567 nopout_wqe->flags = 0; 568 if (!unsol) 569 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 570 else if (nopout_hdr->itt == RESERVED_ITT) 571 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 572 573 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 574 nopout_wqe->data_length = data_len; 575 if (data_len) { 576 /* handle payload data, not required in first release */ 577 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); 578 } else { 579 nopout_wqe->bd_list_addr_lo = (u32) 580 bnx2i_conn->hba->mp_bd_dma; 581 nopout_wqe->bd_list_addr_hi = 582 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 583 nopout_wqe->num_bds = 1; 584 } 585 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 586 587 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 588 return 0; 589 } 590 591 592 /** 593 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware 594 * @conn: iscsi connection 595 * @cmd: driver command structure which is requesting 596 * a WQE to sent to chip for further processing 597 * 598 * prepare and post logout request WQE to CNIC firmware 599 */ 600 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, 601 struct iscsi_task *task) 602 { 603 struct bnx2i_cmd *bnx2i_cmd; 604 struct bnx2i_logout_request *logout_wqe; 605 struct iscsi_logout *logout_hdr; 606 607 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 608 logout_hdr = (struct iscsi_logout *)task->hdr; 609 610 logout_wqe = (struct bnx2i_logout_request *) 611 bnx2i_conn->ep->qp.sq_prod_qe; 612 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); 613 614 logout_wqe->op_code = logout_hdr->opcode; 615 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 616 logout_wqe->op_attr = 617 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; 618 logout_wqe->itt = ((u16)task->itt | 619 (ISCSI_TASK_TYPE_MPATH << 620 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); 621 logout_wqe->data_length = 0; 622 logout_wqe->cid = 0; 623 624 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 625 logout_wqe->bd_list_addr_hi = (u32) 626 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 627 logout_wqe->num_bds = 1; 628 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 629 630 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; 631 632 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 633 return 0; 634 } 635 636 637 /** 638 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware 639 * @conn: iscsi connection which requires iscsi parameter update 640 * 641 * sends down iSCSI Conn Update request to move iSCSI conn to FFP 642 */ 643 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) 644 { 645 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 646 struct bnx2i_hba *hba = bnx2i_conn->hba; 647 struct kwqe *kwqe_arr[2]; 648 struct iscsi_kwqe_conn_update *update_wqe; 649 struct iscsi_kwqe_conn_update conn_update_kwqe; 650 651 update_wqe = &conn_update_kwqe; 652 653 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; 654 update_wqe->hdr.flags = 655 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 656 657 /* 5771x requires conn context id to be passed as is */ 658 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) 659 update_wqe->context_id = bnx2i_conn->ep->ep_cid; 660 else 661 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); 662 update_wqe->conn_flags = 0; 663 if (conn->hdrdgst_en) 664 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; 665 if (conn->datadgst_en) 666 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; 667 if (conn->session->initial_r2t_en) 668 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; 669 if (conn->session->imm_data_en) 670 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; 671 672 update_wqe->max_send_pdu_length = conn->max_xmit_dlength; 673 update_wqe->max_recv_pdu_length = conn->max_recv_dlength; 674 update_wqe->first_burst_length = conn->session->first_burst; 675 update_wqe->max_burst_length = conn->session->max_burst; 676 update_wqe->exp_stat_sn = conn->exp_statsn; 677 update_wqe->max_outstanding_r2ts = conn->session->max_r2t; 678 update_wqe->session_error_recovery_level = conn->session->erl; 679 iscsi_conn_printk(KERN_ALERT, conn, 680 "bnx2i: conn update - MBL 0x%x FBL 0x%x" 681 "MRDSL_I 0x%x MRDSL_T 0x%x \n", 682 update_wqe->max_burst_length, 683 update_wqe->first_burst_length, 684 update_wqe->max_recv_pdu_length, 685 update_wqe->max_send_pdu_length); 686 687 kwqe_arr[0] = (struct kwqe *) update_wqe; 688 if (hba->cnic && hba->cnic->submit_kwqes) 689 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 690 } 691 692 693 /** 694 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware 695 * @data: endpoint (transport handle) structure pointer 696 * 697 * routine to handle connection offload/destroy request timeout 698 */ 699 void bnx2i_ep_ofld_timer(unsigned long data) 700 { 701 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data; 702 703 if (ep->state == EP_STATE_OFLD_START) { 704 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); 705 ep->state = EP_STATE_OFLD_FAILED; 706 } else if (ep->state == EP_STATE_DISCONN_START) { 707 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); 708 ep->state = EP_STATE_DISCONN_TIMEDOUT; 709 } else if (ep->state == EP_STATE_CLEANUP_START) { 710 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); 711 ep->state = EP_STATE_CLEANUP_FAILED; 712 } 713 714 wake_up_interruptible(&ep->ofld_wait); 715 } 716 717 718 static int bnx2i_power_of2(u32 val) 719 { 720 u32 power = 0; 721 if (val & (val - 1)) 722 return power; 723 val--; 724 while (val) { 725 val = val >> 1; 726 power++; 727 } 728 return power; 729 } 730 731 732 /** 733 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request 734 * @hba: adapter structure pointer 735 * @cmd: driver command structure which is requesting 736 * a WQE to sent to chip for further processing 737 * 738 * prepares and posts CONN_OFLD_REQ1/2 KWQE 739 */ 740 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 741 { 742 struct bnx2i_cleanup_request *cmd_cleanup; 743 744 cmd_cleanup = 745 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; 746 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); 747 748 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; 749 cmd_cleanup->itt = cmd->req.itt; 750 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ 751 752 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); 753 } 754 755 756 /** 757 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process 758 * @hba: adapter structure pointer 759 * @ep: endpoint (transport indentifier) structure 760 * 761 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate 762 * iscsi connection context clean-up process 763 */ 764 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 765 { 766 struct kwqe *kwqe_arr[2]; 767 struct iscsi_kwqe_conn_destroy conn_cleanup; 768 int rc = -EINVAL; 769 770 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); 771 772 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; 773 conn_cleanup.hdr.flags = 774 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 775 /* 5771x requires conn context id to be passed as is */ 776 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 777 conn_cleanup.context_id = ep->ep_cid; 778 else 779 conn_cleanup.context_id = (ep->ep_cid >> 7); 780 781 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; 782 783 kwqe_arr[0] = (struct kwqe *) &conn_cleanup; 784 if (hba->cnic && hba->cnic->submit_kwqes) 785 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 786 787 return rc; 788 } 789 790 791 /** 792 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process 793 * @hba: adapter structure pointer 794 * @ep: endpoint (transport indentifier) structure 795 * 796 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 797 */ 798 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, 799 struct bnx2i_endpoint *ep) 800 { 801 struct kwqe *kwqe_arr[2]; 802 struct iscsi_kwqe_conn_offload1 ofld_req1; 803 struct iscsi_kwqe_conn_offload2 ofld_req2; 804 dma_addr_t dma_addr; 805 int num_kwqes = 2; 806 u32 *ptbl; 807 int rc = -EINVAL; 808 809 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 810 ofld_req1.hdr.flags = 811 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 812 813 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 814 815 dma_addr = ep->qp.sq_pgtbl_phys; 816 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 817 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 818 819 dma_addr = ep->qp.cq_pgtbl_phys; 820 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 821 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 822 823 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 824 ofld_req2.hdr.flags = 825 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 826 827 dma_addr = ep->qp.rq_pgtbl_phys; 828 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 829 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 830 831 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 832 833 ofld_req2.sq_first_pte.hi = *ptbl++; 834 ofld_req2.sq_first_pte.lo = *ptbl; 835 836 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 837 ofld_req2.cq_first_pte.hi = *ptbl++; 838 ofld_req2.cq_first_pte.lo = *ptbl; 839 840 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 841 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 842 ofld_req2.num_additional_wqes = 0; 843 844 if (hba->cnic && hba->cnic->submit_kwqes) 845 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 846 847 return rc; 848 } 849 850 851 /** 852 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation 853 * @hba: adapter structure pointer 854 * @ep: endpoint (transport indentifier) structure 855 * 856 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 857 */ 858 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, 859 struct bnx2i_endpoint *ep) 860 { 861 struct kwqe *kwqe_arr[5]; 862 struct iscsi_kwqe_conn_offload1 ofld_req1; 863 struct iscsi_kwqe_conn_offload2 ofld_req2; 864 struct iscsi_kwqe_conn_offload3 ofld_req3[1]; 865 dma_addr_t dma_addr; 866 int num_kwqes = 2; 867 u32 *ptbl; 868 int rc = -EINVAL; 869 870 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 871 ofld_req1.hdr.flags = 872 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 873 874 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 875 876 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; 877 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 878 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 879 880 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; 881 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 882 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 883 884 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 885 ofld_req2.hdr.flags = 886 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 887 888 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; 889 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 890 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 891 892 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 893 ofld_req2.sq_first_pte.hi = *ptbl++; 894 ofld_req2.sq_first_pte.lo = *ptbl; 895 896 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 897 ofld_req2.cq_first_pte.hi = *ptbl++; 898 ofld_req2.cq_first_pte.lo = *ptbl; 899 900 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 901 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 902 903 ofld_req2.num_additional_wqes = 1; 904 memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); 905 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 906 ofld_req3[0].qp_first_pte[0].hi = *ptbl++; 907 ofld_req3[0].qp_first_pte[0].lo = *ptbl; 908 909 kwqe_arr[2] = (struct kwqe *) ofld_req3; 910 /* need if we decide to go with multiple KCQE's per conn */ 911 num_kwqes += 1; 912 913 if (hba->cnic && hba->cnic->submit_kwqes) 914 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 915 916 return rc; 917 } 918 919 /** 920 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process 921 * 922 * @hba: adapter structure pointer 923 * @ep: endpoint (transport indentifier) structure 924 * 925 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE 926 */ 927 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 928 { 929 int rc; 930 931 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 932 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); 933 else 934 rc = bnx2i_570x_send_conn_ofld_req(hba, ep); 935 936 return rc; 937 } 938 939 940 /** 941 * setup_qp_page_tables - iscsi QP page table setup function 942 * @ep: endpoint (transport indentifier) structure 943 * 944 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires 945 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires 946 * PT in little endian format 947 */ 948 static void setup_qp_page_tables(struct bnx2i_endpoint *ep) 949 { 950 int num_pages; 951 u32 *ptbl; 952 dma_addr_t page; 953 int cnic_dev_10g; 954 955 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 956 cnic_dev_10g = 1; 957 else 958 cnic_dev_10g = 0; 959 960 /* SQ page table */ 961 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); 962 num_pages = ep->qp.sq_mem_size / PAGE_SIZE; 963 page = ep->qp.sq_phys; 964 965 if (cnic_dev_10g) 966 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 967 else 968 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 969 while (num_pages--) { 970 if (cnic_dev_10g) { 971 /* PTE is written in little endian format for 57710 */ 972 *ptbl = (u32) page; 973 ptbl++; 974 *ptbl = (u32) ((u64) page >> 32); 975 ptbl++; 976 page += PAGE_SIZE; 977 } else { 978 /* PTE is written in big endian format for 979 * 5706/5708/5709 devices */ 980 *ptbl = (u32) ((u64) page >> 32); 981 ptbl++; 982 *ptbl = (u32) page; 983 ptbl++; 984 page += PAGE_SIZE; 985 } 986 } 987 988 /* RQ page table */ 989 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); 990 num_pages = ep->qp.rq_mem_size / PAGE_SIZE; 991 page = ep->qp.rq_phys; 992 993 if (cnic_dev_10g) 994 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 995 else 996 ptbl = (u32 *) ep->qp.rq_pgtbl_virt; 997 while (num_pages--) { 998 if (cnic_dev_10g) { 999 /* PTE is written in little endian format for 57710 */ 1000 *ptbl = (u32) page; 1001 ptbl++; 1002 *ptbl = (u32) ((u64) page >> 32); 1003 ptbl++; 1004 page += PAGE_SIZE; 1005 } else { 1006 /* PTE is written in big endian format for 1007 * 5706/5708/5709 devices */ 1008 *ptbl = (u32) ((u64) page >> 32); 1009 ptbl++; 1010 *ptbl = (u32) page; 1011 ptbl++; 1012 page += PAGE_SIZE; 1013 } 1014 } 1015 1016 /* CQ page table */ 1017 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); 1018 num_pages = ep->qp.cq_mem_size / PAGE_SIZE; 1019 page = ep->qp.cq_phys; 1020 1021 if (cnic_dev_10g) 1022 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 1023 else 1024 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 1025 while (num_pages--) { 1026 if (cnic_dev_10g) { 1027 /* PTE is written in little endian format for 57710 */ 1028 *ptbl = (u32) page; 1029 ptbl++; 1030 *ptbl = (u32) ((u64) page >> 32); 1031 ptbl++; 1032 page += PAGE_SIZE; 1033 } else { 1034 /* PTE is written in big endian format for 1035 * 5706/5708/5709 devices */ 1036 *ptbl = (u32) ((u64) page >> 32); 1037 ptbl++; 1038 *ptbl = (u32) page; 1039 ptbl++; 1040 page += PAGE_SIZE; 1041 } 1042 } 1043 } 1044 1045 1046 /** 1047 * bnx2i_alloc_qp_resc - allocates required resources for QP. 1048 * @hba: adapter structure pointer 1049 * @ep: endpoint (transport indentifier) structure 1050 * 1051 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able 1052 * memory for SQ/RQ/CQ and page tables. EP structure elements such 1053 * as producer/consumer indexes/pointers, queue sizes and page table 1054 * contents are setup 1055 */ 1056 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1057 { 1058 struct bnx2i_5771x_cq_db *cq_db; 1059 1060 ep->hba = hba; 1061 ep->conn = NULL; 1062 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; 1063 1064 /* Allocate page table memory for SQ which is page aligned */ 1065 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; 1066 ep->qp.sq_mem_size = 1067 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1068 ep->qp.sq_pgtbl_size = 1069 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *); 1070 ep->qp.sq_pgtbl_size = 1071 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1072 1073 ep->qp.sq_pgtbl_virt = 1074 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1075 &ep->qp.sq_pgtbl_phys, GFP_KERNEL); 1076 if (!ep->qp.sq_pgtbl_virt) { 1077 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", 1078 ep->qp.sq_pgtbl_size); 1079 goto mem_alloc_err; 1080 } 1081 1082 /* Allocate memory area for actual SQ element */ 1083 ep->qp.sq_virt = 1084 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1085 &ep->qp.sq_phys, GFP_KERNEL); 1086 if (!ep->qp.sq_virt) { 1087 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", 1088 ep->qp.sq_mem_size); 1089 goto mem_alloc_err; 1090 } 1091 1092 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size); 1093 ep->qp.sq_first_qe = ep->qp.sq_virt; 1094 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1095 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1096 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1097 ep->qp.sq_prod_idx = 0; 1098 ep->qp.sq_cons_idx = 0; 1099 ep->qp.sqe_left = hba->max_sqes; 1100 1101 /* Allocate page table memory for CQ which is page aligned */ 1102 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1103 ep->qp.cq_mem_size = 1104 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1105 ep->qp.cq_pgtbl_size = 1106 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *); 1107 ep->qp.cq_pgtbl_size = 1108 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1109 1110 ep->qp.cq_pgtbl_virt = 1111 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1112 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1113 if (!ep->qp.cq_pgtbl_virt) { 1114 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1115 ep->qp.cq_pgtbl_size); 1116 goto mem_alloc_err; 1117 } 1118 1119 /* Allocate memory area for actual CQ element */ 1120 ep->qp.cq_virt = 1121 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1122 &ep->qp.cq_phys, GFP_KERNEL); 1123 if (!ep->qp.cq_virt) { 1124 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1125 ep->qp.cq_mem_size); 1126 goto mem_alloc_err; 1127 } 1128 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size); 1129 1130 ep->qp.cq_first_qe = ep->qp.cq_virt; 1131 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1132 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1133 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1134 ep->qp.cq_prod_idx = 0; 1135 ep->qp.cq_cons_idx = 0; 1136 ep->qp.cqe_left = hba->max_cqes; 1137 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1138 ep->qp.cqe_size = hba->max_cqes; 1139 1140 /* Invalidate all EQ CQE index, req only for 57710 */ 1141 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1142 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1143 1144 /* Allocate page table memory for RQ which is page aligned */ 1145 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1146 ep->qp.rq_mem_size = 1147 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1148 ep->qp.rq_pgtbl_size = 1149 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *); 1150 ep->qp.rq_pgtbl_size = 1151 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1152 1153 ep->qp.rq_pgtbl_virt = 1154 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1155 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1156 if (!ep->qp.rq_pgtbl_virt) { 1157 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1158 ep->qp.rq_pgtbl_size); 1159 goto mem_alloc_err; 1160 } 1161 1162 /* Allocate memory area for actual RQ element */ 1163 ep->qp.rq_virt = 1164 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1165 &ep->qp.rq_phys, GFP_KERNEL); 1166 if (!ep->qp.rq_virt) { 1167 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1168 ep->qp.rq_mem_size); 1169 goto mem_alloc_err; 1170 } 1171 1172 ep->qp.rq_first_qe = ep->qp.rq_virt; 1173 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1174 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1175 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1176 ep->qp.rq_prod_idx = 0x8000; 1177 ep->qp.rq_cons_idx = 0; 1178 ep->qp.rqe_left = hba->max_rqes; 1179 1180 setup_qp_page_tables(ep); 1181 1182 return 0; 1183 1184 mem_alloc_err: 1185 bnx2i_free_qp_resc(hba, ep); 1186 return -ENOMEM; 1187 } 1188 1189 1190 1191 /** 1192 * bnx2i_free_qp_resc - free memory resources held by QP 1193 * @hba: adapter structure pointer 1194 * @ep: endpoint (transport indentifier) structure 1195 * 1196 * Free QP resources - SQ/RQ/CQ memory and page tables. 1197 */ 1198 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1199 { 1200 if (ep->qp.ctx_base) { 1201 iounmap(ep->qp.ctx_base); 1202 ep->qp.ctx_base = NULL; 1203 } 1204 /* Free SQ mem */ 1205 if (ep->qp.sq_pgtbl_virt) { 1206 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1207 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1208 ep->qp.sq_pgtbl_virt = NULL; 1209 ep->qp.sq_pgtbl_phys = 0; 1210 } 1211 if (ep->qp.sq_virt) { 1212 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1213 ep->qp.sq_virt, ep->qp.sq_phys); 1214 ep->qp.sq_virt = NULL; 1215 ep->qp.sq_phys = 0; 1216 } 1217 1218 /* Free RQ mem */ 1219 if (ep->qp.rq_pgtbl_virt) { 1220 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1221 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1222 ep->qp.rq_pgtbl_virt = NULL; 1223 ep->qp.rq_pgtbl_phys = 0; 1224 } 1225 if (ep->qp.rq_virt) { 1226 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1227 ep->qp.rq_virt, ep->qp.rq_phys); 1228 ep->qp.rq_virt = NULL; 1229 ep->qp.rq_phys = 0; 1230 } 1231 1232 /* Free CQ mem */ 1233 if (ep->qp.cq_pgtbl_virt) { 1234 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1235 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1236 ep->qp.cq_pgtbl_virt = NULL; 1237 ep->qp.cq_pgtbl_phys = 0; 1238 } 1239 if (ep->qp.cq_virt) { 1240 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1241 ep->qp.cq_virt, ep->qp.cq_phys); 1242 ep->qp.cq_virt = NULL; 1243 ep->qp.cq_phys = 0; 1244 } 1245 } 1246 1247 1248 /** 1249 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1250 * @hba: adapter structure pointer 1251 * 1252 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1253 * This results in iSCSi support validation and on-chip context manager 1254 * initialization. Firmware completes this handshake with a CQE carrying 1255 * the result of iscsi support validation. Parameter carried by 1256 * iscsi init request determines the number of offloaded connection and 1257 * tolerance level for iscsi protocol violation this hba/chip can support 1258 */ 1259 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1260 { 1261 struct kwqe *kwqe_arr[3]; 1262 struct iscsi_kwqe_init1 iscsi_init; 1263 struct iscsi_kwqe_init2 iscsi_init2; 1264 int rc = 0; 1265 u64 mask64; 1266 1267 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1)); 1268 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2)); 1269 1270 bnx2i_adjust_qp_size(hba); 1271 1272 iscsi_init.flags = 1273 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1274 if (en_tcp_dack) 1275 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1276 iscsi_init.reserved0 = 0; 1277 iscsi_init.num_cqs = 1; 1278 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1279 iscsi_init.hdr.flags = 1280 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1281 1282 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1283 iscsi_init.dummy_buffer_addr_hi = 1284 (u32) ((u64) hba->dummy_buf_dma >> 32); 1285 1286 hba->num_ccell = hba->max_sqes >> 1; 1287 hba->ctx_ccell_tasks = 1288 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1289 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1290 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1291 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1292 iscsi_init.sq_num_wqes = hba->max_sqes; 1293 iscsi_init.cq_log_wqes_per_page = 1294 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE); 1295 iscsi_init.cq_num_wqes = hba->max_cqes; 1296 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1297 (PAGE_SIZE - 1)) / PAGE_SIZE; 1298 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1299 (PAGE_SIZE - 1)) / PAGE_SIZE; 1300 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1301 iscsi_init.rq_num_wqes = hba->max_rqes; 1302 1303 1304 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1305 iscsi_init2.hdr.flags = 1306 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1307 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1308 mask64 = 0x0ULL; 1309 mask64 |= ( 1310 /* CISCO MDS */ 1311 (1UL << 1312 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1313 /* HP MSA1510i */ 1314 (1UL << 1315 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1316 /* EMC */ 1317 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1318 if (error_mask1) { 1319 iscsi_init2.error_bit_map[0] = error_mask1; 1320 mask64 ^= (u32)(mask64); 1321 mask64 |= error_mask1; 1322 } else 1323 iscsi_init2.error_bit_map[0] = (u32) mask64; 1324 1325 if (error_mask2) { 1326 iscsi_init2.error_bit_map[1] = error_mask2; 1327 mask64 &= 0xffffffff; 1328 mask64 |= ((u64)error_mask2 << 32); 1329 } else 1330 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1331 1332 iscsi_error_mask = mask64; 1333 1334 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1335 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1336 1337 if (hba->cnic && hba->cnic->submit_kwqes) 1338 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1339 return rc; 1340 } 1341 1342 1343 /** 1344 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1345 * @session: iscsi session 1346 * @bnx2i_conn: bnx2i connection 1347 * @cqe: pointer to newly DMA'ed CQE entry for processing 1348 * 1349 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1350 */ 1351 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1352 struct bnx2i_conn *bnx2i_conn, 1353 struct cqe *cqe) 1354 { 1355 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1356 struct bnx2i_hba *hba = bnx2i_conn->hba; 1357 struct bnx2i_cmd_response *resp_cqe; 1358 struct bnx2i_cmd *bnx2i_cmd; 1359 struct iscsi_task *task; 1360 struct iscsi_scsi_rsp *hdr; 1361 u32 datalen = 0; 1362 1363 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1364 spin_lock_bh(&session->lock); 1365 task = iscsi_itt_to_task(conn, 1366 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1367 if (!task) 1368 goto fail; 1369 1370 bnx2i_cmd = task->dd_data; 1371 1372 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { 1373 conn->datain_pdus_cnt += 1374 resp_cqe->task_stat.read_stat.num_data_ins; 1375 conn->rxdata_octets += 1376 bnx2i_cmd->req.total_data_transfer_length; 1377 ADD_STATS_64(hba, rx_pdus, 1378 resp_cqe->task_stat.read_stat.num_data_ins); 1379 ADD_STATS_64(hba, rx_bytes, 1380 bnx2i_cmd->req.total_data_transfer_length); 1381 } else { 1382 conn->dataout_pdus_cnt += 1383 resp_cqe->task_stat.write_stat.num_data_outs; 1384 conn->r2t_pdus_cnt += 1385 resp_cqe->task_stat.write_stat.num_r2ts; 1386 conn->txdata_octets += 1387 bnx2i_cmd->req.total_data_transfer_length; 1388 ADD_STATS_64(hba, tx_pdus, 1389 resp_cqe->task_stat.write_stat.num_data_outs); 1390 ADD_STATS_64(hba, tx_bytes, 1391 bnx2i_cmd->req.total_data_transfer_length); 1392 ADD_STATS_64(hba, rx_pdus, 1393 resp_cqe->task_stat.write_stat.num_r2ts); 1394 } 1395 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1396 1397 hdr = (struct iscsi_scsi_rsp *)task->hdr; 1398 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1399 hdr->opcode = resp_cqe->op_code; 1400 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1401 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1402 hdr->response = resp_cqe->response; 1403 hdr->cmd_status = resp_cqe->status; 1404 hdr->flags = resp_cqe->response_flags; 1405 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1406 1407 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1408 goto done; 1409 1410 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1411 datalen = resp_cqe->data_length; 1412 if (datalen < 2) 1413 goto done; 1414 1415 if (datalen > BNX2I_RQ_WQE_SIZE) { 1416 iscsi_conn_printk(KERN_ERR, conn, 1417 "sense data len %d > RQ sz\n", 1418 datalen); 1419 datalen = BNX2I_RQ_WQE_SIZE; 1420 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1421 iscsi_conn_printk(KERN_ERR, conn, 1422 "sense data len %d > conn data\n", 1423 datalen); 1424 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1425 } 1426 1427 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1428 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1429 } 1430 1431 done: 1432 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1433 conn->data, datalen); 1434 fail: 1435 spin_unlock_bh(&session->lock); 1436 return 0; 1437 } 1438 1439 1440 /** 1441 * bnx2i_process_login_resp - this function handles iscsi login response 1442 * @session: iscsi session pointer 1443 * @bnx2i_conn: iscsi connection pointer 1444 * @cqe: pointer to newly DMA'ed CQE entry for processing 1445 * 1446 * process Login Response CQE & complete it to open-iscsi user daemon 1447 */ 1448 static int bnx2i_process_login_resp(struct iscsi_session *session, 1449 struct bnx2i_conn *bnx2i_conn, 1450 struct cqe *cqe) 1451 { 1452 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1453 struct iscsi_task *task; 1454 struct bnx2i_login_response *login; 1455 struct iscsi_login_rsp *resp_hdr; 1456 int pld_len; 1457 int pad_len; 1458 1459 login = (struct bnx2i_login_response *) cqe; 1460 spin_lock(&session->lock); 1461 task = iscsi_itt_to_task(conn, 1462 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1463 if (!task) 1464 goto done; 1465 1466 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1467 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1468 resp_hdr->opcode = login->op_code; 1469 resp_hdr->flags = login->response_flags; 1470 resp_hdr->max_version = login->version_max; 1471 resp_hdr->active_version = login->version_active; 1472 resp_hdr->hlength = 0; 1473 1474 hton24(resp_hdr->dlength, login->data_length); 1475 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1476 resp_hdr->tsih = cpu_to_be16(login->tsih); 1477 resp_hdr->itt = task->hdr->itt; 1478 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1479 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1480 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1481 resp_hdr->status_class = login->status_class; 1482 resp_hdr->status_detail = login->status_detail; 1483 pld_len = login->data_length; 1484 bnx2i_conn->gen_pdu.resp_wr_ptr = 1485 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1486 1487 pad_len = 0; 1488 if (pld_len & 0x3) 1489 pad_len = 4 - (pld_len % 4); 1490 1491 if (pad_len) { 1492 int i = 0; 1493 for (i = 0; i < pad_len; i++) { 1494 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1495 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1496 } 1497 } 1498 1499 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1500 bnx2i_conn->gen_pdu.resp_buf, 1501 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1502 done: 1503 spin_unlock(&session->lock); 1504 return 0; 1505 } 1506 1507 1508 /** 1509 * bnx2i_process_text_resp - this function handles iscsi text response 1510 * @session: iscsi session pointer 1511 * @bnx2i_conn: iscsi connection pointer 1512 * @cqe: pointer to newly DMA'ed CQE entry for processing 1513 * 1514 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon 1515 */ 1516 static int bnx2i_process_text_resp(struct iscsi_session *session, 1517 struct bnx2i_conn *bnx2i_conn, 1518 struct cqe *cqe) 1519 { 1520 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1521 struct iscsi_task *task; 1522 struct bnx2i_text_response *text; 1523 struct iscsi_text_rsp *resp_hdr; 1524 int pld_len; 1525 int pad_len; 1526 1527 text = (struct bnx2i_text_response *) cqe; 1528 spin_lock(&session->lock); 1529 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1530 if (!task) 1531 goto done; 1532 1533 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; 1534 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1535 resp_hdr->opcode = text->op_code; 1536 resp_hdr->flags = text->response_flags; 1537 resp_hdr->hlength = 0; 1538 1539 hton24(resp_hdr->dlength, text->data_length); 1540 resp_hdr->itt = task->hdr->itt; 1541 resp_hdr->ttt = cpu_to_be32(text->ttt); 1542 resp_hdr->statsn = task->hdr->exp_statsn; 1543 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); 1544 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); 1545 pld_len = text->data_length; 1546 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + 1547 pld_len; 1548 pad_len = 0; 1549 if (pld_len & 0x3) 1550 pad_len = 4 - (pld_len % 4); 1551 1552 if (pad_len) { 1553 int i = 0; 1554 for (i = 0; i < pad_len; i++) { 1555 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1556 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1557 } 1558 } 1559 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1560 bnx2i_conn->gen_pdu.resp_buf, 1561 bnx2i_conn->gen_pdu.resp_wr_ptr - 1562 bnx2i_conn->gen_pdu.resp_buf); 1563 done: 1564 spin_unlock(&session->lock); 1565 return 0; 1566 } 1567 1568 1569 /** 1570 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1571 * @session: iscsi session pointer 1572 * @bnx2i_conn: iscsi connection pointer 1573 * @cqe: pointer to newly DMA'ed CQE entry for processing 1574 * 1575 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1576 */ 1577 static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1578 struct bnx2i_conn *bnx2i_conn, 1579 struct cqe *cqe) 1580 { 1581 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1582 struct iscsi_task *task; 1583 struct bnx2i_tmf_response *tmf_cqe; 1584 struct iscsi_tm_rsp *resp_hdr; 1585 1586 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1587 spin_lock(&session->lock); 1588 task = iscsi_itt_to_task(conn, 1589 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1590 if (!task) 1591 goto done; 1592 1593 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1594 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1595 resp_hdr->opcode = tmf_cqe->op_code; 1596 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1597 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1598 resp_hdr->itt = task->hdr->itt; 1599 resp_hdr->response = tmf_cqe->response; 1600 1601 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1602 done: 1603 spin_unlock(&session->lock); 1604 return 0; 1605 } 1606 1607 /** 1608 * bnx2i_process_logout_resp - this function handles iscsi logout response 1609 * @session: iscsi session pointer 1610 * @bnx2i_conn: iscsi connection pointer 1611 * @cqe: pointer to newly DMA'ed CQE entry for processing 1612 * 1613 * process iSCSI Logout Response CQE & make function call to 1614 * notify the user daemon. 1615 */ 1616 static int bnx2i_process_logout_resp(struct iscsi_session *session, 1617 struct bnx2i_conn *bnx2i_conn, 1618 struct cqe *cqe) 1619 { 1620 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1621 struct iscsi_task *task; 1622 struct bnx2i_logout_response *logout; 1623 struct iscsi_logout_rsp *resp_hdr; 1624 1625 logout = (struct bnx2i_logout_response *) cqe; 1626 spin_lock(&session->lock); 1627 task = iscsi_itt_to_task(conn, 1628 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1629 if (!task) 1630 goto done; 1631 1632 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1633 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1634 resp_hdr->opcode = logout->op_code; 1635 resp_hdr->flags = logout->response; 1636 resp_hdr->hlength = 0; 1637 1638 resp_hdr->itt = task->hdr->itt; 1639 resp_hdr->statsn = task->hdr->exp_statsn; 1640 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1641 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1642 1643 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1644 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1645 1646 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1647 1648 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1649 done: 1650 spin_unlock(&session->lock); 1651 return 0; 1652 } 1653 1654 /** 1655 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1656 * @session: iscsi session pointer 1657 * @bnx2i_conn: iscsi connection pointer 1658 * @cqe: pointer to newly DMA'ed CQE entry for processing 1659 * 1660 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1661 */ 1662 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1663 struct bnx2i_conn *bnx2i_conn, 1664 struct cqe *cqe) 1665 { 1666 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1667 struct bnx2i_nop_in_msg *nop_in; 1668 struct iscsi_task *task; 1669 1670 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1671 spin_lock(&session->lock); 1672 task = iscsi_itt_to_task(conn, 1673 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1674 if (task) 1675 __iscsi_put_task(task); 1676 spin_unlock(&session->lock); 1677 } 1678 1679 /** 1680 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1681 * @conn: iscsi connection 1682 * 1683 * Firmware advances RQ producer index for every unsolicited PDU even if 1684 * payload data length is '0'. This function makes corresponding 1685 * adjustments on the driver side to match this f/w behavior 1686 */ 1687 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1688 { 1689 char dummy_rq_data[2]; 1690 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1691 bnx2i_put_rq_buf(bnx2i_conn, 1); 1692 } 1693 1694 1695 /** 1696 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1697 * @session: iscsi session pointer 1698 * @bnx2i_conn: iscsi connection pointer 1699 * @cqe: pointer to newly DMA'ed CQE entry for processing 1700 * 1701 * process iSCSI target's proactive iSCSI NOPIN request 1702 */ 1703 static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1704 struct bnx2i_conn *bnx2i_conn, 1705 struct cqe *cqe) 1706 { 1707 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1708 struct iscsi_task *task; 1709 struct bnx2i_nop_in_msg *nop_in; 1710 struct iscsi_nopin *hdr; 1711 int tgt_async_nop = 0; 1712 1713 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1714 1715 spin_lock(&session->lock); 1716 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1717 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1718 hdr->opcode = nop_in->op_code; 1719 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1720 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1721 hdr->ttt = cpu_to_be32(nop_in->ttt); 1722 1723 if (nop_in->itt == (u16) RESERVED_ITT) { 1724 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1725 hdr->itt = RESERVED_ITT; 1726 tgt_async_nop = 1; 1727 goto done; 1728 } 1729 1730 /* this is a response to one of our nop-outs */ 1731 task = iscsi_itt_to_task(conn, 1732 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1733 if (task) { 1734 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1735 hdr->itt = task->hdr->itt; 1736 hdr->ttt = cpu_to_be32(nop_in->ttt); 1737 memcpy(&hdr->lun, nop_in->lun, 8); 1738 } 1739 done: 1740 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1741 spin_unlock(&session->lock); 1742 1743 return tgt_async_nop; 1744 } 1745 1746 1747 /** 1748 * bnx2i_process_async_mesg - this function handles iscsi async message 1749 * @session: iscsi session pointer 1750 * @bnx2i_conn: iscsi connection pointer 1751 * @cqe: pointer to newly DMA'ed CQE entry for processing 1752 * 1753 * process iSCSI ASYNC Message 1754 */ 1755 static void bnx2i_process_async_mesg(struct iscsi_session *session, 1756 struct bnx2i_conn *bnx2i_conn, 1757 struct cqe *cqe) 1758 { 1759 struct bnx2i_async_msg *async_cqe; 1760 struct iscsi_async *resp_hdr; 1761 u8 async_event; 1762 1763 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1764 1765 async_cqe = (struct bnx2i_async_msg *)cqe; 1766 async_event = async_cqe->async_event; 1767 1768 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1769 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1770 "async: scsi events not supported\n"); 1771 return; 1772 } 1773 1774 spin_lock(&session->lock); 1775 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1776 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1777 resp_hdr->opcode = async_cqe->op_code; 1778 resp_hdr->flags = 0x80; 1779 1780 memcpy(&resp_hdr->lun, async_cqe->lun, 8); 1781 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1782 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1783 1784 resp_hdr->async_event = async_cqe->async_event; 1785 resp_hdr->async_vcode = async_cqe->async_vcode; 1786 1787 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1788 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1789 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1790 1791 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1792 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1793 spin_unlock(&session->lock); 1794 } 1795 1796 1797 /** 1798 * bnx2i_process_reject_mesg - process iscsi reject pdu 1799 * @session: iscsi session pointer 1800 * @bnx2i_conn: iscsi connection pointer 1801 * @cqe: pointer to newly DMA'ed CQE entry for processing 1802 * 1803 * process iSCSI REJECT message 1804 */ 1805 static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1806 struct bnx2i_conn *bnx2i_conn, 1807 struct cqe *cqe) 1808 { 1809 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1810 struct bnx2i_reject_msg *reject; 1811 struct iscsi_reject *hdr; 1812 1813 reject = (struct bnx2i_reject_msg *) cqe; 1814 if (reject->data_length) { 1815 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1816 bnx2i_put_rq_buf(bnx2i_conn, 1); 1817 } else 1818 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1819 1820 spin_lock(&session->lock); 1821 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1822 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1823 hdr->opcode = reject->op_code; 1824 hdr->reason = reject->reason; 1825 hton24(hdr->dlength, reject->data_length); 1826 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1827 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1828 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1829 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1830 reject->data_length); 1831 spin_unlock(&session->lock); 1832 } 1833 1834 /** 1835 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1836 * @session: iscsi session pointer 1837 * @bnx2i_conn: iscsi connection pointer 1838 * @cqe: pointer to newly DMA'ed CQE entry for processing 1839 * 1840 * process command cleanup response CQE during conn shutdown or error recovery 1841 */ 1842 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1843 struct bnx2i_conn *bnx2i_conn, 1844 struct cqe *cqe) 1845 { 1846 struct bnx2i_cleanup_response *cmd_clean_rsp; 1847 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1848 struct iscsi_task *task; 1849 1850 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1851 spin_lock(&session->lock); 1852 task = iscsi_itt_to_task(conn, 1853 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1854 if (!task) 1855 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1856 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1857 spin_unlock(&session->lock); 1858 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1859 } 1860 1861 1862 /** 1863 * bnx2i_percpu_io_thread - thread per cpu for ios 1864 * 1865 * @arg: ptr to bnx2i_percpu_info structure 1866 */ 1867 int bnx2i_percpu_io_thread(void *arg) 1868 { 1869 struct bnx2i_percpu_s *p = arg; 1870 struct bnx2i_work *work, *tmp; 1871 LIST_HEAD(work_list); 1872 1873 set_user_nice(current, -20); 1874 1875 while (!kthread_should_stop()) { 1876 spin_lock_bh(&p->p_work_lock); 1877 while (!list_empty(&p->work_list)) { 1878 list_splice_init(&p->work_list, &work_list); 1879 spin_unlock_bh(&p->p_work_lock); 1880 1881 list_for_each_entry_safe(work, tmp, &work_list, list) { 1882 list_del_init(&work->list); 1883 /* work allocated in the bh, freed here */ 1884 bnx2i_process_scsi_cmd_resp(work->session, 1885 work->bnx2i_conn, 1886 &work->cqe); 1887 atomic_dec(&work->bnx2i_conn->work_cnt); 1888 kfree(work); 1889 } 1890 spin_lock_bh(&p->p_work_lock); 1891 } 1892 set_current_state(TASK_INTERRUPTIBLE); 1893 spin_unlock_bh(&p->p_work_lock); 1894 schedule(); 1895 } 1896 __set_current_state(TASK_RUNNING); 1897 1898 return 0; 1899 } 1900 1901 1902 /** 1903 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread 1904 * @bnx2i_conn: bnx2i connection 1905 * 1906 * this function is called by generic KCQ handler to queue all pending cmd 1907 * completion CQEs 1908 * 1909 * The implementation is to queue the cmd response based on the 1910 * last recorded command for the given connection. The 1911 * cpu_id gets recorded upon task_xmit. No out-of-order completion! 1912 */ 1913 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, 1914 struct bnx2i_conn *bnx2i_conn, 1915 struct bnx2i_nop_in_msg *cqe) 1916 { 1917 struct bnx2i_work *bnx2i_work = NULL; 1918 struct bnx2i_percpu_s *p = NULL; 1919 struct iscsi_task *task; 1920 struct scsi_cmnd *sc; 1921 int rc = 0; 1922 int cpu; 1923 1924 spin_lock(&session->lock); 1925 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, 1926 cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1927 if (!task || !task->sc) { 1928 spin_unlock(&session->lock); 1929 return -EINVAL; 1930 } 1931 sc = task->sc; 1932 1933 if (!blk_rq_cpu_valid(sc->request)) 1934 cpu = smp_processor_id(); 1935 else 1936 cpu = sc->request->cpu; 1937 1938 spin_unlock(&session->lock); 1939 1940 p = &per_cpu(bnx2i_percpu, cpu); 1941 spin_lock(&p->p_work_lock); 1942 if (unlikely(!p->iothread)) { 1943 rc = -EINVAL; 1944 goto err; 1945 } 1946 /* Alloc and copy to the cqe */ 1947 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC); 1948 if (bnx2i_work) { 1949 INIT_LIST_HEAD(&bnx2i_work->list); 1950 bnx2i_work->session = session; 1951 bnx2i_work->bnx2i_conn = bnx2i_conn; 1952 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe)); 1953 list_add_tail(&bnx2i_work->list, &p->work_list); 1954 atomic_inc(&bnx2i_conn->work_cnt); 1955 wake_up_process(p->iothread); 1956 spin_unlock(&p->p_work_lock); 1957 goto done; 1958 } else 1959 rc = -ENOMEM; 1960 err: 1961 spin_unlock(&p->p_work_lock); 1962 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe); 1963 done: 1964 return rc; 1965 } 1966 1967 1968 /** 1969 * bnx2i_process_new_cqes - process newly DMA'ed CQE's 1970 * @bnx2i_conn: bnx2i connection 1971 * 1972 * this function is called by generic KCQ handler to process all pending CQE's 1973 */ 1974 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) 1975 { 1976 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1977 struct iscsi_session *session = conn->session; 1978 struct bnx2i_hba *hba = bnx2i_conn->hba; 1979 struct qp_info *qp; 1980 struct bnx2i_nop_in_msg *nopin; 1981 int tgt_async_msg; 1982 int cqe_cnt = 0; 1983 1984 if (bnx2i_conn->ep == NULL) 1985 return 0; 1986 1987 qp = &bnx2i_conn->ep->qp; 1988 1989 if (!qp->cq_virt) { 1990 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", 1991 hba->netdev->name); 1992 goto out; 1993 } 1994 while (1) { 1995 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1996 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1997 break; 1998 1999 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { 2000 if (nopin->op_code == ISCSI_OP_NOOP_IN && 2001 nopin->itt == (u16) RESERVED_ITT) { 2002 printk(KERN_ALERT "bnx2i: Unsolicited " 2003 "NOP-In detected for suspended " 2004 "connection dev=%s!\n", 2005 hba->netdev->name); 2006 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 2007 goto cqe_out; 2008 } 2009 break; 2010 } 2011 tgt_async_msg = 0; 2012 2013 switch (nopin->op_code) { 2014 case ISCSI_OP_SCSI_CMD_RSP: 2015 case ISCSI_OP_SCSI_DATA_IN: 2016 /* Run the kthread engine only for data cmds 2017 All other cmds will be completed in this bh! */ 2018 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); 2019 goto done; 2020 case ISCSI_OP_LOGIN_RSP: 2021 bnx2i_process_login_resp(session, bnx2i_conn, 2022 qp->cq_cons_qe); 2023 break; 2024 case ISCSI_OP_SCSI_TMFUNC_RSP: 2025 bnx2i_process_tmf_resp(session, bnx2i_conn, 2026 qp->cq_cons_qe); 2027 break; 2028 case ISCSI_OP_TEXT_RSP: 2029 bnx2i_process_text_resp(session, bnx2i_conn, 2030 qp->cq_cons_qe); 2031 break; 2032 case ISCSI_OP_LOGOUT_RSP: 2033 bnx2i_process_logout_resp(session, bnx2i_conn, 2034 qp->cq_cons_qe); 2035 break; 2036 case ISCSI_OP_NOOP_IN: 2037 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 2038 qp->cq_cons_qe)) 2039 tgt_async_msg = 1; 2040 break; 2041 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 2042 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 2043 qp->cq_cons_qe); 2044 break; 2045 case ISCSI_OP_ASYNC_EVENT: 2046 bnx2i_process_async_mesg(session, bnx2i_conn, 2047 qp->cq_cons_qe); 2048 tgt_async_msg = 1; 2049 break; 2050 case ISCSI_OP_REJECT: 2051 bnx2i_process_reject_mesg(session, bnx2i_conn, 2052 qp->cq_cons_qe); 2053 break; 2054 case ISCSI_OPCODE_CLEANUP_RESPONSE: 2055 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 2056 qp->cq_cons_qe); 2057 break; 2058 default: 2059 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2060 nopin->op_code); 2061 } 2062 2063 ADD_STATS_64(hba, rx_pdus, 1); 2064 ADD_STATS_64(hba, rx_bytes, nopin->data_length); 2065 done: 2066 if (!tgt_async_msg) { 2067 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) 2068 printk(KERN_ALERT "bnx2i (%s): no active cmd! " 2069 "op 0x%x\n", 2070 hba->netdev->name, 2071 nopin->op_code); 2072 else 2073 atomic_dec(&bnx2i_conn->ep->num_active_cmds); 2074 } 2075 cqe_out: 2076 /* clear out in production version only, till beta keep opcode 2077 * field intact, will be helpful in debugging (context dump) 2078 * nopin->op_code = 0; 2079 */ 2080 cqe_cnt++; 2081 qp->cqe_exp_seq_sn++; 2082 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 2083 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 2084 2085 if (qp->cq_cons_qe == qp->cq_last_qe) { 2086 qp->cq_cons_qe = qp->cq_first_qe; 2087 qp->cq_cons_idx = 0; 2088 } else { 2089 qp->cq_cons_qe++; 2090 qp->cq_cons_idx++; 2091 } 2092 } 2093 out: 2094 return cqe_cnt; 2095 } 2096 2097 /** 2098 * bnx2i_fastpath_notification - process global event queue (KCQ) 2099 * @hba: adapter structure pointer 2100 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 2101 * 2102 * Fast path event notification handler, KCQ entry carries context id 2103 * of the connection that has 1 or more pending CQ entries 2104 */ 2105 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 2106 struct iscsi_kcqe *new_cqe_kcqe) 2107 { 2108 struct bnx2i_conn *bnx2i_conn; 2109 u32 iscsi_cid; 2110 int nxt_idx; 2111 2112 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 2113 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2114 2115 if (!bnx2i_conn) { 2116 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 2117 return; 2118 } 2119 if (!bnx2i_conn->ep) { 2120 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 2121 return; 2122 } 2123 2124 bnx2i_process_new_cqes(bnx2i_conn); 2125 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, 2126 CNIC_ARM_CQE_FP); 2127 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) 2128 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); 2129 } 2130 2131 2132 /** 2133 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 2134 * @hba: adapter structure pointer 2135 * @update_kcqe: kcqe pointer 2136 * 2137 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 2138 */ 2139 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 2140 struct iscsi_kcqe *update_kcqe) 2141 { 2142 struct bnx2i_conn *conn; 2143 u32 iscsi_cid; 2144 2145 iscsi_cid = update_kcqe->iscsi_conn_id; 2146 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2147 2148 if (!conn) { 2149 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 2150 return; 2151 } 2152 if (!conn->ep) { 2153 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 2154 return; 2155 } 2156 2157 if (update_kcqe->completion_status) { 2158 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 2159 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 2160 } else 2161 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 2162 2163 wake_up_interruptible(&conn->ep->ofld_wait); 2164 } 2165 2166 2167 /** 2168 * bnx2i_recovery_que_add_conn - add connection to recovery queue 2169 * @hba: adapter structure pointer 2170 * @bnx2i_conn: iscsi connection 2171 * 2172 * Add connection to recovery queue and schedule adapter eh worker 2173 */ 2174 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 2175 struct bnx2i_conn *bnx2i_conn) 2176 { 2177 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 2178 ISCSI_ERR_CONN_FAILED); 2179 } 2180 2181 2182 /** 2183 * bnx2i_process_tcp_error - process error notification on a given connection 2184 * 2185 * @hba: adapter structure pointer 2186 * @tcp_err: tcp error kcqe pointer 2187 * 2188 * handles tcp level error notifications from FW. 2189 */ 2190 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 2191 struct iscsi_kcqe *tcp_err) 2192 { 2193 struct bnx2i_conn *bnx2i_conn; 2194 u32 iscsi_cid; 2195 2196 iscsi_cid = tcp_err->iscsi_conn_id; 2197 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2198 2199 if (!bnx2i_conn) { 2200 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2201 return; 2202 } 2203 2204 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 2205 iscsi_cid, tcp_err->completion_status); 2206 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2207 } 2208 2209 2210 /** 2211 * bnx2i_process_iscsi_error - process error notification on a given connection 2212 * @hba: adapter structure pointer 2213 * @iscsi_err: iscsi error kcqe pointer 2214 * 2215 * handles iscsi error notifications from the FW. Firmware based in initial 2216 * handshake classifies iscsi protocol / TCP rfc violation into either 2217 * warning or error indications. If indication is of "Error" type, driver 2218 * will initiate session recovery for that connection/session. For 2219 * "Warning" type indication, driver will put out a system log message 2220 * (there will be only one message for each type for the life of the 2221 * session, this is to avoid un-necessarily overloading the system) 2222 */ 2223 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 2224 struct iscsi_kcqe *iscsi_err) 2225 { 2226 struct bnx2i_conn *bnx2i_conn; 2227 u32 iscsi_cid; 2228 char warn_notice[] = "iscsi_warning"; 2229 char error_notice[] = "iscsi_error"; 2230 char additional_notice[64]; 2231 char *message; 2232 int need_recovery; 2233 u64 err_mask64; 2234 2235 iscsi_cid = iscsi_err->iscsi_conn_id; 2236 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 2237 if (!bnx2i_conn) { 2238 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 2239 return; 2240 } 2241 2242 err_mask64 = (0x1ULL << iscsi_err->completion_status); 2243 2244 if (err_mask64 & iscsi_error_mask) { 2245 need_recovery = 0; 2246 message = warn_notice; 2247 } else { 2248 need_recovery = 1; 2249 message = error_notice; 2250 } 2251 2252 switch (iscsi_err->completion_status) { 2253 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 2254 strcpy(additional_notice, "hdr digest err"); 2255 break; 2256 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 2257 strcpy(additional_notice, "data digest err"); 2258 break; 2259 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 2260 strcpy(additional_notice, "wrong opcode rcvd"); 2261 break; 2262 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 2263 strcpy(additional_notice, "AHS len > 0 rcvd"); 2264 break; 2265 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 2266 strcpy(additional_notice, "invalid ITT rcvd"); 2267 break; 2268 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 2269 strcpy(additional_notice, "wrong StatSN rcvd"); 2270 break; 2271 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 2272 strcpy(additional_notice, "wrong DataSN rcvd"); 2273 break; 2274 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 2275 strcpy(additional_notice, "pend R2T violation"); 2276 break; 2277 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 2278 strcpy(additional_notice, "ERL0, UO"); 2279 break; 2280 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2281 strcpy(additional_notice, "ERL0, U1"); 2282 break; 2283 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2284 strcpy(additional_notice, "ERL0, U2"); 2285 break; 2286 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2287 strcpy(additional_notice, "ERL0, U3"); 2288 break; 2289 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2290 strcpy(additional_notice, "ERL0, U4"); 2291 break; 2292 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2293 strcpy(additional_notice, "ERL0, U5"); 2294 break; 2295 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2296 strcpy(additional_notice, "ERL0, U6"); 2297 break; 2298 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2299 strcpy(additional_notice, "invalid resi len"); 2300 break; 2301 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2302 strcpy(additional_notice, "MRDSL violation"); 2303 break; 2304 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2305 strcpy(additional_notice, "F-bit not set"); 2306 break; 2307 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2308 strcpy(additional_notice, "invalid TTT"); 2309 break; 2310 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2311 strcpy(additional_notice, "invalid DataSN"); 2312 break; 2313 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2314 strcpy(additional_notice, "burst len violation"); 2315 break; 2316 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2317 strcpy(additional_notice, "buf offset violation"); 2318 break; 2319 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2320 strcpy(additional_notice, "invalid LUN field"); 2321 break; 2322 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2323 strcpy(additional_notice, "invalid R2TSN field"); 2324 break; 2325 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2326 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2327 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2328 strcpy(additional_notice, "invalid cmd len1"); 2329 break; 2330 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2331 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2332 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2333 strcpy(additional_notice, "invalid cmd len2"); 2334 break; 2335 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2336 strcpy(additional_notice, 2337 "pend r2t exceeds MaxOutstandingR2T value"); 2338 break; 2339 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2340 strcpy(additional_notice, "TTT is rsvd"); 2341 break; 2342 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2343 strcpy(additional_notice, "MBL violation"); 2344 break; 2345 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2346 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2347 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2348 strcpy(additional_notice, "data seg len != 0"); 2349 break; 2350 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2351 strcpy(additional_notice, "reject pdu len error"); 2352 break; 2353 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2354 strcpy(additional_notice, "async pdu len error"); 2355 break; 2356 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2357 strcpy(additional_notice, "nopin pdu len error"); 2358 break; 2359 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2360 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2361 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2362 strcpy(additional_notice, "pend r2t in cleanup"); 2363 break; 2364 2365 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2366 strcpy(additional_notice, "IP fragments rcvd"); 2367 break; 2368 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2369 strcpy(additional_notice, "IP options error"); 2370 break; 2371 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2372 strcpy(additional_notice, "urgent flag error"); 2373 break; 2374 default: 2375 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2376 iscsi_err->completion_status); 2377 } 2378 2379 if (need_recovery) { 2380 iscsi_conn_printk(KERN_ALERT, 2381 bnx2i_conn->cls_conn->dd_data, 2382 "bnx2i: %s - %s\n", 2383 message, additional_notice); 2384 2385 iscsi_conn_printk(KERN_ALERT, 2386 bnx2i_conn->cls_conn->dd_data, 2387 "conn_err - hostno %d conn %p, " 2388 "iscsi_cid %x cid %x\n", 2389 bnx2i_conn->hba->shost->host_no, 2390 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2391 bnx2i_conn->ep->ep_cid); 2392 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2393 } else 2394 if (!test_and_set_bit(iscsi_err->completion_status, 2395 (void *) &bnx2i_conn->violation_notified)) 2396 iscsi_conn_printk(KERN_ALERT, 2397 bnx2i_conn->cls_conn->dd_data, 2398 "bnx2i: %s - %s\n", 2399 message, additional_notice); 2400 } 2401 2402 2403 /** 2404 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2405 * @hba: adapter structure pointer 2406 * @conn_destroy: conn destroy kcqe pointer 2407 * 2408 * handles connection destroy completion request. 2409 */ 2410 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2411 struct iscsi_kcqe *conn_destroy) 2412 { 2413 struct bnx2i_endpoint *ep; 2414 2415 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2416 if (!ep) { 2417 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2418 "offload request, unexpected complection\n"); 2419 return; 2420 } 2421 2422 if (hba != ep->hba) { 2423 printk(KERN_ALERT "conn destroy- error hba mis-match\n"); 2424 return; 2425 } 2426 2427 if (conn_destroy->completion_status) { 2428 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2429 ep->state = EP_STATE_CLEANUP_FAILED; 2430 } else 2431 ep->state = EP_STATE_CLEANUP_CMPL; 2432 wake_up_interruptible(&ep->ofld_wait); 2433 } 2434 2435 2436 /** 2437 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2438 * @hba: adapter structure pointer 2439 * @ofld_kcqe: conn offload kcqe pointer 2440 * 2441 * handles initial connection offload completion, ep_connect() thread is 2442 * woken-up to continue with LLP connect process 2443 */ 2444 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2445 struct iscsi_kcqe *ofld_kcqe) 2446 { 2447 u32 cid_addr; 2448 struct bnx2i_endpoint *ep; 2449 u32 cid_num; 2450 2451 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2452 if (!ep) { 2453 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2454 return; 2455 } 2456 2457 if (hba != ep->hba) { 2458 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n"); 2459 return; 2460 } 2461 2462 if (ofld_kcqe->completion_status) { 2463 ep->state = EP_STATE_OFLD_FAILED; 2464 if (ofld_kcqe->completion_status == 2465 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2466 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2467 "to allocate iSCSI context resources\n", 2468 hba->netdev->name); 2469 else if (ofld_kcqe->completion_status == 2470 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2471 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2472 "opcode\n", hba->netdev->name); 2473 else if (ofld_kcqe->completion_status == 2474 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2475 /* error status code valid only for 5771x chipset */ 2476 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2477 else 2478 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2479 "error code %d\n", hba->netdev->name, 2480 ofld_kcqe->completion_status); 2481 } else { 2482 ep->state = EP_STATE_OFLD_COMPL; 2483 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2484 cid_num = bnx2i_get_cid_num(ep); 2485 ep->ep_cid = cid_addr; 2486 ep->qp.ctx_base = NULL; 2487 } 2488 wake_up_interruptible(&ep->ofld_wait); 2489 } 2490 2491 /** 2492 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE 2493 * @hba: adapter structure pointer 2494 * @update_kcqe: kcqe pointer 2495 * 2496 * Generic KCQ event handler/dispatcher 2497 */ 2498 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2499 u32 num_cqe) 2500 { 2501 struct bnx2i_hba *hba = context; 2502 int i = 0; 2503 struct iscsi_kcqe *ikcqe = NULL; 2504 2505 while (i < num_cqe) { 2506 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2507 2508 if (ikcqe->op_code == 2509 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2510 bnx2i_fastpath_notification(hba, ikcqe); 2511 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2512 bnx2i_process_ofld_cmpl(hba, ikcqe); 2513 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2514 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2515 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2516 if (ikcqe->completion_status != 2517 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2518 bnx2i_iscsi_license_error(hba, ikcqe->\ 2519 completion_status); 2520 else { 2521 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2522 bnx2i_get_link_state(hba); 2523 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2524 "ISCSI_INIT passed\n", 2525 (u8)hba->pcidev->bus->number, 2526 hba->pci_devno, 2527 (u8)hba->pci_func); 2528 2529 2530 } 2531 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2532 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2533 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2534 bnx2i_process_iscsi_error(hba, ikcqe); 2535 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2536 bnx2i_process_tcp_error(hba, ikcqe); 2537 else 2538 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2539 ikcqe->op_code); 2540 } 2541 } 2542 2543 2544 /** 2545 * bnx2i_indicate_netevent - Generic netdev event handler 2546 * @context: adapter structure pointer 2547 * @event: event type 2548 * @vlan_id: vlans id - associated vlan id with this event 2549 * 2550 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2551 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2552 */ 2553 static void bnx2i_indicate_netevent(void *context, unsigned long event, 2554 u16 vlan_id) 2555 { 2556 struct bnx2i_hba *hba = context; 2557 2558 /* Ignore all netevent coming from vlans */ 2559 if (vlan_id != 0) 2560 return; 2561 2562 switch (event) { 2563 case NETDEV_UP: 2564 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2565 bnx2i_send_fw_iscsi_init_msg(hba); 2566 break; 2567 case NETDEV_DOWN: 2568 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2569 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2570 break; 2571 case NETDEV_GOING_DOWN: 2572 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2573 iscsi_host_for_each_session(hba->shost, 2574 bnx2i_drop_session); 2575 break; 2576 case NETDEV_CHANGE: 2577 bnx2i_get_link_state(hba); 2578 break; 2579 default: 2580 ; 2581 } 2582 } 2583 2584 2585 /** 2586 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2587 * @cm_sk: cnic sock structure pointer 2588 * 2589 * function callback exported via bnx2i - cnic driver interface to 2590 * indicate completion of option-2 TCP connect request. 2591 */ 2592 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2593 { 2594 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2595 2596 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2597 ep->state = EP_STATE_CONNECT_FAILED; 2598 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2599 ep->state = EP_STATE_CONNECT_COMPL; 2600 else 2601 ep->state = EP_STATE_CONNECT_FAILED; 2602 2603 wake_up_interruptible(&ep->ofld_wait); 2604 } 2605 2606 2607 /** 2608 * bnx2i_cm_close_cmpl - process tcp conn close completion 2609 * @cm_sk: cnic sock structure pointer 2610 * 2611 * function callback exported via bnx2i - cnic driver interface to 2612 * indicate completion of option-2 graceful TCP connect shutdown 2613 */ 2614 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2615 { 2616 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2617 2618 ep->state = EP_STATE_DISCONN_COMPL; 2619 wake_up_interruptible(&ep->ofld_wait); 2620 } 2621 2622 2623 /** 2624 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2625 * @cm_sk: cnic sock structure pointer 2626 * 2627 * function callback exported via bnx2i - cnic driver interface to 2628 * indicate completion of option-2 abortive TCP connect termination 2629 */ 2630 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2631 { 2632 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2633 2634 ep->state = EP_STATE_DISCONN_COMPL; 2635 wake_up_interruptible(&ep->ofld_wait); 2636 } 2637 2638 2639 /** 2640 * bnx2i_cm_remote_close - process received TCP FIN 2641 * @hba: adapter structure pointer 2642 * @update_kcqe: kcqe pointer 2643 * 2644 * function callback exported via bnx2i - cnic driver interface to indicate 2645 * async TCP events such as FIN 2646 */ 2647 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2648 { 2649 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2650 2651 ep->state = EP_STATE_TCP_FIN_RCVD; 2652 if (ep->conn) 2653 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2654 } 2655 2656 /** 2657 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2658 * @hba: adapter structure pointer 2659 * @update_kcqe: kcqe pointer 2660 * 2661 * function callback exported via bnx2i - cnic driver interface to 2662 * indicate async TCP events (RST) sent by the peer. 2663 */ 2664 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2665 { 2666 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2667 u32 old_state = ep->state; 2668 2669 ep->state = EP_STATE_TCP_RST_RCVD; 2670 if (old_state == EP_STATE_DISCONN_START) 2671 wake_up_interruptible(&ep->ofld_wait); 2672 else 2673 if (ep->conn) 2674 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2675 } 2676 2677 2678 static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2679 char *buf, u16 buflen) 2680 { 2681 struct bnx2i_hba *hba = context; 2682 int rc; 2683 2684 if (!hba) 2685 return -ENODEV; 2686 2687 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2688 msg_type, buf, buflen); 2689 if (rc) 2690 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2691 2692 return rc; 2693 } 2694 2695 2696 /** 2697 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2698 * carrying callback function pointers 2699 * 2700 */ 2701 struct cnic_ulp_ops bnx2i_cnic_cb = { 2702 .cnic_init = bnx2i_ulp_init, 2703 .cnic_exit = bnx2i_ulp_exit, 2704 .cnic_start = bnx2i_start, 2705 .cnic_stop = bnx2i_stop, 2706 .indicate_kcqes = bnx2i_indicate_kcqe, 2707 .indicate_netevent = bnx2i_indicate_netevent, 2708 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2709 .cm_close_complete = bnx2i_cm_close_cmpl, 2710 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2711 .cm_remote_close = bnx2i_cm_remote_close, 2712 .cm_remote_abort = bnx2i_cm_remote_abort, 2713 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2714 .cnic_get_stats = bnx2i_get_stats, 2715 .owner = THIS_MODULE 2716 }; 2717 2718 2719 /** 2720 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2721 * @ep: bnx2i endpoint 2722 * 2723 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2724 * register in BAR #0. Whereas in 57710 these register are accessed by 2725 * mapping BAR #1 2726 */ 2727 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2728 { 2729 u32 cid_num; 2730 u32 reg_off; 2731 u32 first_l4l5; 2732 u32 ctx_sz; 2733 u32 config2; 2734 resource_size_t reg_base; 2735 2736 cid_num = bnx2i_get_cid_num(ep); 2737 2738 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2739 reg_base = pci_resource_start(ep->hba->pcidev, 2740 BNX2X_DOORBELL_PCI_BAR); 2741 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF); 2742 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4); 2743 goto arm_cq; 2744 } 2745 2746 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && 2747 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { 2748 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); 2749 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; 2750 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; 2751 if (ctx_sz) 2752 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE 2753 + BNX2I_570X_PAGE_SIZE_DEFAULT * 2754 (((cid_num - first_l4l5) / ctx_sz) + 256); 2755 else 2756 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2757 } else 2758 /* 5709 device in normal node and 5706/5708 devices */ 2759 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2760 2761 ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off, 2762 MB_KERNEL_CTX_SIZE); 2763 if (!ep->qp.ctx_base) 2764 return -ENOMEM; 2765 2766 arm_cq: 2767 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); 2768 return 0; 2769 } 2770