1 /* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2010 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 /** 21 * bnx2i_get_cid_num - get cid from ep 22 * @ep: endpoint pointer 23 * 24 * Only applicable to 57710 family of devices 25 */ 26 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep) 27 { 28 u32 cid; 29 30 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 31 cid = ep->ep_cid; 32 else 33 cid = GET_CID_NUM(ep->ep_cid); 34 return cid; 35 } 36 37 38 /** 39 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type 40 * @hba: Adapter for which adjustments is to be made 41 * 42 * Only applicable to 57710 family of devices 43 */ 44 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba) 45 { 46 u32 num_elements_per_pg; 47 48 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) || 49 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) || 50 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 51 if (!is_power_of_2(hba->max_sqes)) 52 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes); 53 54 if (!is_power_of_2(hba->max_rqes)) 55 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes); 56 } 57 58 /* Adjust each queue size if the user selection does not 59 * yield integral num of page buffers 60 */ 61 /* adjust SQ */ 62 num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 63 if (hba->max_sqes < num_elements_per_pg) 64 hba->max_sqes = num_elements_per_pg; 65 else if (hba->max_sqes % num_elements_per_pg) 66 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) & 67 ~(num_elements_per_pg - 1); 68 69 /* adjust CQ */ 70 num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE; 71 if (hba->max_cqes < num_elements_per_pg) 72 hba->max_cqes = num_elements_per_pg; 73 else if (hba->max_cqes % num_elements_per_pg) 74 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) & 75 ~(num_elements_per_pg - 1); 76 77 /* adjust RQ */ 78 num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE; 79 if (hba->max_rqes < num_elements_per_pg) 80 hba->max_rqes = num_elements_per_pg; 81 else if (hba->max_rqes % num_elements_per_pg) 82 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) & 83 ~(num_elements_per_pg - 1); 84 } 85 86 87 /** 88 * bnx2i_get_link_state - get network interface link state 89 * @hba: adapter instance pointer 90 * 91 * updates adapter structure flag based on netdev state 92 */ 93 static void bnx2i_get_link_state(struct bnx2i_hba *hba) 94 { 95 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state)) 96 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 97 else 98 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); 99 } 100 101 102 /** 103 * bnx2i_iscsi_license_error - displays iscsi license related error message 104 * @hba: adapter instance pointer 105 * @error_code: error classification 106 * 107 * Puts out an error log when driver is unable to offload iscsi connection 108 * due to license restrictions 109 */ 110 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code) 111 { 112 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED) 113 /* iSCSI offload not supported on this device */ 114 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n", 115 hba->netdev->name); 116 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED) 117 /* iSCSI offload not supported on this LOM device */ 118 printk(KERN_ERR "bnx2i: LOM is not enable to " 119 "offload iSCSI connections, dev=%s\n", 120 hba->netdev->name); 121 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state); 122 } 123 124 125 /** 126 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification 127 * @ep: endpoint (transport indentifier) structure 128 * @action: action, ARM or DISARM. For now only ARM_CQE is used 129 * 130 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt 131 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is 132 * outstanding and on chip timer expires 133 */ 134 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action) 135 { 136 struct bnx2i_5771x_cq_db *cq_db; 137 u16 cq_index; 138 u16 next_index; 139 u32 num_active_cmds; 140 141 142 /* Coalesce CQ entries only on 10G devices */ 143 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 144 return; 145 146 /* Do not update CQ DB multiple times before firmware writes 147 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious 148 * interrupts and other unwanted results 149 */ 150 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 151 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF) 152 return; 153 154 if (action == CNIC_ARM_CQE) { 155 num_active_cmds = ep->num_active_cmds; 156 if (num_active_cmds <= event_coal_min) 157 next_index = 1; 158 else 159 next_index = event_coal_min + 160 (num_active_cmds - event_coal_min) / event_coal_div; 161 if (!next_index) 162 next_index = 1; 163 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1; 164 if (cq_index > ep->qp.cqe_size * 2) 165 cq_index -= ep->qp.cqe_size * 2; 166 if (!cq_index) 167 cq_index = 1; 168 169 cq_db->sqn[0] = cq_index; 170 } 171 } 172 173 174 /** 175 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer 176 * @conn: iscsi connection on which RQ event occured 177 * @ptr: driver buffer to which RQ buffer contents is to 178 * be copied 179 * @len: length of valid data inside RQ buf 180 * 181 * Copies RQ buffer contents from shared (DMA'able) memory region to 182 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and 183 * scsi sense info 184 */ 185 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len) 186 { 187 if (!bnx2i_conn->ep->qp.rqe_left) 188 return; 189 190 bnx2i_conn->ep->qp.rqe_left--; 191 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len); 192 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) { 193 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe; 194 bnx2i_conn->ep->qp.rq_cons_idx = 0; 195 } else { 196 bnx2i_conn->ep->qp.rq_cons_qe++; 197 bnx2i_conn->ep->qp.rq_cons_idx++; 198 } 199 } 200 201 202 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) 203 { 204 struct bnx2i_5771x_dbell dbell; 205 u32 msg; 206 207 memset(&dbell, 0, sizeof(dbell)); 208 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << 209 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); 210 msg = *((u32 *)&dbell); 211 /* TODO : get doorbell register mapping */ 212 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); 213 } 214 215 216 /** 217 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell 218 * @conn: iscsi connection on which event to post 219 * @count: number of RQ buffer being posted to chip 220 * 221 * No need to ring hardware doorbell for 57710 family of devices 222 */ 223 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count) 224 { 225 struct bnx2i_5771x_sq_rq_db *rq_db; 226 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000); 227 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 228 229 ep->qp.rqe_left += count; 230 ep->qp.rq_prod_idx &= 0x7FFF; 231 ep->qp.rq_prod_idx += count; 232 233 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) { 234 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes; 235 if (!hi_bit) 236 ep->qp.rq_prod_idx |= 0x8000; 237 } else 238 ep->qp.rq_prod_idx |= hi_bit; 239 240 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 241 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt; 242 rq_db->prod_idx = ep->qp.rq_prod_idx; 243 /* no need to ring hardware doorbell for 57710 */ 244 } else { 245 writew(ep->qp.rq_prod_idx, 246 ep->qp.ctx_base + CNIC_RECV_DOORBELL); 247 } 248 mmiowb(); 249 } 250 251 252 /** 253 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine 254 * @conn: iscsi connection to which new SQ entries belong 255 * @count: number of SQ WQEs to post 256 * 257 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family 258 * of devices. For 5706/5708/5709 new SQ WQE count is written into the 259 * doorbell register 260 */ 261 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) 262 { 263 struct bnx2i_5771x_sq_rq_db *sq_db; 264 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 265 266 ep->num_active_cmds++; 267 wmb(); /* flush SQ WQE memory before the doorbell is rung */ 268 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 269 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; 270 sq_db->prod_idx = ep->qp.sq_prod_idx; 271 bnx2i_ring_577xx_doorbell(bnx2i_conn); 272 } else 273 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); 274 275 mmiowb(); /* flush posted PCI writes */ 276 } 277 278 279 /** 280 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters 281 * @conn: iscsi connection to which new SQ entries belong 282 * @count: number of SQ WQEs to post 283 * 284 * this routine will update SQ driver parameters and ring the doorbell 285 */ 286 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, 287 int count) 288 { 289 int tmp_cnt; 290 291 if (count == 1) { 292 if (bnx2i_conn->ep->qp.sq_prod_qe == 293 bnx2i_conn->ep->qp.sq_last_qe) 294 bnx2i_conn->ep->qp.sq_prod_qe = 295 bnx2i_conn->ep->qp.sq_first_qe; 296 else 297 bnx2i_conn->ep->qp.sq_prod_qe++; 298 } else { 299 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= 300 bnx2i_conn->ep->qp.sq_last_qe) 301 bnx2i_conn->ep->qp.sq_prod_qe += count; 302 else { 303 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - 304 bnx2i_conn->ep->qp.sq_prod_qe; 305 bnx2i_conn->ep->qp.sq_prod_qe = 306 &bnx2i_conn->ep->qp.sq_first_qe[count - 307 (tmp_cnt + 1)]; 308 } 309 } 310 bnx2i_conn->ep->qp.sq_prod_idx += count; 311 /* Ring the doorbell */ 312 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); 313 } 314 315 316 /** 317 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware 318 * @conn: iscsi connection 319 * @cmd: driver command structure which is requesting 320 * a WQE to sent to chip for further processing 321 * 322 * prepare and post an iSCSI Login request WQE to CNIC firmware 323 */ 324 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, 325 struct iscsi_task *task) 326 { 327 struct bnx2i_cmd *bnx2i_cmd; 328 struct bnx2i_login_request *login_wqe; 329 struct iscsi_login *login_hdr; 330 u32 dword; 331 332 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 333 login_hdr = (struct iscsi_login *)task->hdr; 334 login_wqe = (struct bnx2i_login_request *) 335 bnx2i_conn->ep->qp.sq_prod_qe; 336 337 login_wqe->op_code = login_hdr->opcode; 338 login_wqe->op_attr = login_hdr->flags; 339 login_wqe->version_max = login_hdr->max_version; 340 login_wqe->version_min = login_hdr->min_version; 341 login_wqe->data_length = ntoh24(login_hdr->dlength); 342 login_wqe->isid_lo = *((u32 *) login_hdr->isid); 343 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2); 344 login_wqe->tsih = login_hdr->tsih; 345 login_wqe->itt = task->itt | 346 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT); 347 login_wqe->cid = login_hdr->cid; 348 349 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn); 350 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); 351 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN; 352 353 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; 354 login_wqe->resp_bd_list_addr_hi = 355 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); 356 357 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) | 358 (bnx2i_conn->gen_pdu.resp_buf_size << 359 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); 360 login_wqe->resp_buffer = dword; 361 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; 362 login_wqe->bd_list_addr_hi = 363 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); 364 login_wqe->num_bds = 1; 365 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 366 367 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 368 return 0; 369 } 370 371 /** 372 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware 373 * @conn: iscsi connection 374 * @mtask: driver command structure which is requesting 375 * a WQE to sent to chip for further processing 376 * 377 * prepare and post an iSCSI Login request WQE to CNIC firmware 378 */ 379 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn, 380 struct iscsi_task *mtask) 381 { 382 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 383 struct iscsi_tm *tmfabort_hdr; 384 struct scsi_cmnd *ref_sc; 385 struct iscsi_task *ctask; 386 struct bnx2i_cmd *bnx2i_cmd; 387 struct bnx2i_tmf_request *tmfabort_wqe; 388 u32 dword; 389 u32 scsi_lun[2]; 390 391 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data; 392 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; 393 tmfabort_wqe = (struct bnx2i_tmf_request *) 394 bnx2i_conn->ep->qp.sq_prod_qe; 395 396 tmfabort_wqe->op_code = tmfabort_hdr->opcode; 397 tmfabort_wqe->op_attr = tmfabort_hdr->flags; 398 399 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); 400 tmfabort_wqe->reserved2 = 0; 401 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); 402 403 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { 404 case ISCSI_TM_FUNC_ABORT_TASK: 405 case ISCSI_TM_FUNC_TASK_REASSIGN: 406 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); 407 if (!ctask || !ctask->sc) 408 /* 409 * the iscsi layer must have completed the cmd while 410 * was starting up. 411 * 412 * Note: In the case of a SCSI cmd timeout, the task's 413 * sc is still active; hence ctask->sc != 0 414 * In this case, the task must be aborted 415 */ 416 return 0; 417 418 ref_sc = ctask->sc; 419 if (ref_sc->sc_data_direction == DMA_TO_DEVICE) 420 dword = (ISCSI_TASK_TYPE_WRITE << 421 ISCSI_CMD_REQUEST_TYPE_SHIFT); 422 else 423 dword = (ISCSI_TASK_TYPE_READ << 424 ISCSI_CMD_REQUEST_TYPE_SHIFT); 425 tmfabort_wqe->ref_itt = (dword | 426 (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); 427 break; 428 default: 429 tmfabort_wqe->ref_itt = RESERVED_ITT; 430 } 431 memcpy(scsi_lun, tmfabort_hdr->lun, sizeof(struct scsi_lun)); 432 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); 433 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); 434 435 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); 436 437 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 438 tmfabort_wqe->bd_list_addr_hi = (u32) 439 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 440 tmfabort_wqe->num_bds = 1; 441 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 442 443 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 444 return 0; 445 } 446 447 /** 448 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware 449 * @conn: iscsi connection 450 * @cmd: driver command structure which is requesting 451 * a WQE to sent to chip for further processing 452 * 453 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware 454 */ 455 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, 456 struct bnx2i_cmd *cmd) 457 { 458 struct bnx2i_cmd_request *scsi_cmd_wqe; 459 460 scsi_cmd_wqe = (struct bnx2i_cmd_request *) 461 bnx2i_conn->ep->qp.sq_prod_qe; 462 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); 463 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 464 465 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 466 return 0; 467 } 468 469 /** 470 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware 471 * @conn: iscsi connection 472 * @cmd: driver command structure which is requesting 473 * a WQE to sent to chip for further processing 474 * @datap: payload buffer pointer 475 * @data_len: payload data length 476 * @unsol: indicated whether nopout pdu is unsolicited pdu or 477 * in response to target's NOPIN w/ TTT != FFFFFFFF 478 * 479 * prepare and post a nopout request WQE to CNIC firmware 480 */ 481 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, 482 struct iscsi_task *task, 483 char *datap, int data_len, int unsol) 484 { 485 struct bnx2i_endpoint *ep = bnx2i_conn->ep; 486 struct bnx2i_cmd *bnx2i_cmd; 487 struct bnx2i_nop_out_request *nopout_wqe; 488 struct iscsi_nopout *nopout_hdr; 489 490 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 491 nopout_hdr = (struct iscsi_nopout *)task->hdr; 492 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; 493 nopout_wqe->op_code = nopout_hdr->opcode; 494 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; 495 memcpy(nopout_wqe->lun, nopout_hdr->lun, 8); 496 497 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 498 u32 tmp = nopout_hdr->lun[0]; 499 /* 57710 requires LUN field to be swapped */ 500 nopout_hdr->lun[0] = nopout_hdr->lun[1]; 501 nopout_hdr->lun[1] = tmp; 502 } 503 504 nopout_wqe->itt = ((u16)task->itt | 505 (ISCSI_TASK_TYPE_MPATH << 506 ISCSI_TMF_REQUEST_TYPE_SHIFT)); 507 nopout_wqe->ttt = nopout_hdr->ttt; 508 nopout_wqe->flags = 0; 509 if (!unsol) 510 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 511 else if (nopout_hdr->itt == RESERVED_ITT) 512 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; 513 514 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 515 nopout_wqe->data_length = data_len; 516 if (data_len) { 517 /* handle payload data, not required in first release */ 518 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); 519 } else { 520 nopout_wqe->bd_list_addr_lo = (u32) 521 bnx2i_conn->hba->mp_bd_dma; 522 nopout_wqe->bd_list_addr_hi = 523 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 524 nopout_wqe->num_bds = 1; 525 } 526 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 527 528 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 529 return 0; 530 } 531 532 533 /** 534 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware 535 * @conn: iscsi connection 536 * @cmd: driver command structure which is requesting 537 * a WQE to sent to chip for further processing 538 * 539 * prepare and post logout request WQE to CNIC firmware 540 */ 541 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, 542 struct iscsi_task *task) 543 { 544 struct bnx2i_cmd *bnx2i_cmd; 545 struct bnx2i_logout_request *logout_wqe; 546 struct iscsi_logout *logout_hdr; 547 548 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data; 549 logout_hdr = (struct iscsi_logout *)task->hdr; 550 551 logout_wqe = (struct bnx2i_logout_request *) 552 bnx2i_conn->ep->qp.sq_prod_qe; 553 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); 554 555 logout_wqe->op_code = logout_hdr->opcode; 556 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 557 logout_wqe->op_attr = 558 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; 559 logout_wqe->itt = ((u16)task->itt | 560 (ISCSI_TASK_TYPE_MPATH << 561 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); 562 logout_wqe->data_length = 0; 563 logout_wqe->cid = 0; 564 565 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; 566 logout_wqe->bd_list_addr_hi = (u32) 567 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); 568 logout_wqe->num_bds = 1; 569 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ 570 571 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; 572 573 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); 574 return 0; 575 } 576 577 578 /** 579 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware 580 * @conn: iscsi connection which requires iscsi parameter update 581 * 582 * sends down iSCSI Conn Update request to move iSCSI conn to FFP 583 */ 584 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) 585 { 586 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 587 struct bnx2i_hba *hba = bnx2i_conn->hba; 588 struct kwqe *kwqe_arr[2]; 589 struct iscsi_kwqe_conn_update *update_wqe; 590 struct iscsi_kwqe_conn_update conn_update_kwqe; 591 592 update_wqe = &conn_update_kwqe; 593 594 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; 595 update_wqe->hdr.flags = 596 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 597 598 /* 5771x requires conn context id to be passed as is */ 599 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) 600 update_wqe->context_id = bnx2i_conn->ep->ep_cid; 601 else 602 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); 603 update_wqe->conn_flags = 0; 604 if (conn->hdrdgst_en) 605 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; 606 if (conn->datadgst_en) 607 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; 608 if (conn->session->initial_r2t_en) 609 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; 610 if (conn->session->imm_data_en) 611 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; 612 613 update_wqe->max_send_pdu_length = conn->max_xmit_dlength; 614 update_wqe->max_recv_pdu_length = conn->max_recv_dlength; 615 update_wqe->first_burst_length = conn->session->first_burst; 616 update_wqe->max_burst_length = conn->session->max_burst; 617 update_wqe->exp_stat_sn = conn->exp_statsn; 618 update_wqe->max_outstanding_r2ts = conn->session->max_r2t; 619 update_wqe->session_error_recovery_level = conn->session->erl; 620 iscsi_conn_printk(KERN_ALERT, conn, 621 "bnx2i: conn update - MBL 0x%x FBL 0x%x" 622 "MRDSL_I 0x%x MRDSL_T 0x%x \n", 623 update_wqe->max_burst_length, 624 update_wqe->first_burst_length, 625 update_wqe->max_recv_pdu_length, 626 update_wqe->max_send_pdu_length); 627 628 kwqe_arr[0] = (struct kwqe *) update_wqe; 629 if (hba->cnic && hba->cnic->submit_kwqes) 630 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 631 } 632 633 634 /** 635 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware 636 * @data: endpoint (transport handle) structure pointer 637 * 638 * routine to handle connection offload/destroy request timeout 639 */ 640 void bnx2i_ep_ofld_timer(unsigned long data) 641 { 642 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data; 643 644 if (ep->state == EP_STATE_OFLD_START) { 645 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); 646 ep->state = EP_STATE_OFLD_FAILED; 647 } else if (ep->state == EP_STATE_DISCONN_START) { 648 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); 649 ep->state = EP_STATE_DISCONN_TIMEDOUT; 650 } else if (ep->state == EP_STATE_CLEANUP_START) { 651 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); 652 ep->state = EP_STATE_CLEANUP_FAILED; 653 } 654 655 wake_up_interruptible(&ep->ofld_wait); 656 } 657 658 659 static int bnx2i_power_of2(u32 val) 660 { 661 u32 power = 0; 662 if (val & (val - 1)) 663 return power; 664 val--; 665 while (val) { 666 val = val >> 1; 667 power++; 668 } 669 return power; 670 } 671 672 673 /** 674 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request 675 * @hba: adapter structure pointer 676 * @cmd: driver command structure which is requesting 677 * a WQE to sent to chip for further processing 678 * 679 * prepares and posts CONN_OFLD_REQ1/2 KWQE 680 */ 681 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 682 { 683 struct bnx2i_cleanup_request *cmd_cleanup; 684 685 cmd_cleanup = 686 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; 687 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); 688 689 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; 690 cmd_cleanup->itt = cmd->req.itt; 691 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ 692 693 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); 694 } 695 696 697 /** 698 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process 699 * @hba: adapter structure pointer 700 * @ep: endpoint (transport indentifier) structure 701 * 702 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate 703 * iscsi connection context clean-up process 704 */ 705 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 706 { 707 struct kwqe *kwqe_arr[2]; 708 struct iscsi_kwqe_conn_destroy conn_cleanup; 709 int rc = -EINVAL; 710 711 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); 712 713 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; 714 conn_cleanup.hdr.flags = 715 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 716 /* 5771x requires conn context id to be passed as is */ 717 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 718 conn_cleanup.context_id = ep->ep_cid; 719 else 720 conn_cleanup.context_id = (ep->ep_cid >> 7); 721 722 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; 723 724 kwqe_arr[0] = (struct kwqe *) &conn_cleanup; 725 if (hba->cnic && hba->cnic->submit_kwqes) 726 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); 727 728 return rc; 729 } 730 731 732 /** 733 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process 734 * @hba: adapter structure pointer 735 * @ep: endpoint (transport indentifier) structure 736 * 737 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 738 */ 739 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, 740 struct bnx2i_endpoint *ep) 741 { 742 struct kwqe *kwqe_arr[2]; 743 struct iscsi_kwqe_conn_offload1 ofld_req1; 744 struct iscsi_kwqe_conn_offload2 ofld_req2; 745 dma_addr_t dma_addr; 746 int num_kwqes = 2; 747 u32 *ptbl; 748 int rc = -EINVAL; 749 750 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 751 ofld_req1.hdr.flags = 752 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 753 754 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 755 756 dma_addr = ep->qp.sq_pgtbl_phys; 757 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 758 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 759 760 dma_addr = ep->qp.cq_pgtbl_phys; 761 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 762 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 763 764 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 765 ofld_req2.hdr.flags = 766 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 767 768 dma_addr = ep->qp.rq_pgtbl_phys; 769 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 770 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 771 772 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 773 774 ofld_req2.sq_first_pte.hi = *ptbl++; 775 ofld_req2.sq_first_pte.lo = *ptbl; 776 777 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 778 ofld_req2.cq_first_pte.hi = *ptbl++; 779 ofld_req2.cq_first_pte.lo = *ptbl; 780 781 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 782 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 783 ofld_req2.num_additional_wqes = 0; 784 785 if (hba->cnic && hba->cnic->submit_kwqes) 786 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 787 788 return rc; 789 } 790 791 792 /** 793 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation 794 * @hba: adapter structure pointer 795 * @ep: endpoint (transport indentifier) structure 796 * 797 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE 798 */ 799 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, 800 struct bnx2i_endpoint *ep) 801 { 802 struct kwqe *kwqe_arr[5]; 803 struct iscsi_kwqe_conn_offload1 ofld_req1; 804 struct iscsi_kwqe_conn_offload2 ofld_req2; 805 struct iscsi_kwqe_conn_offload3 ofld_req3[1]; 806 dma_addr_t dma_addr; 807 int num_kwqes = 2; 808 u32 *ptbl; 809 int rc = -EINVAL; 810 811 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; 812 ofld_req1.hdr.flags = 813 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 814 815 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; 816 817 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; 818 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; 819 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 820 821 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; 822 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; 823 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 824 825 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; 826 ofld_req2.hdr.flags = 827 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 828 829 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; 830 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; 831 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); 832 833 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 834 ofld_req2.sq_first_pte.hi = *ptbl++; 835 ofld_req2.sq_first_pte.lo = *ptbl; 836 837 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 838 ofld_req2.cq_first_pte.hi = *ptbl++; 839 ofld_req2.cq_first_pte.lo = *ptbl; 840 841 kwqe_arr[0] = (struct kwqe *) &ofld_req1; 842 kwqe_arr[1] = (struct kwqe *) &ofld_req2; 843 844 ofld_req2.num_additional_wqes = 1; 845 memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); 846 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 847 ofld_req3[0].qp_first_pte[0].hi = *ptbl++; 848 ofld_req3[0].qp_first_pte[0].lo = *ptbl; 849 850 kwqe_arr[2] = (struct kwqe *) ofld_req3; 851 /* need if we decide to go with multiple KCQE's per conn */ 852 num_kwqes += 1; 853 854 if (hba->cnic && hba->cnic->submit_kwqes) 855 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); 856 857 return rc; 858 } 859 860 /** 861 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process 862 * 863 * @hba: adapter structure pointer 864 * @ep: endpoint (transport indentifier) structure 865 * 866 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE 867 */ 868 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 869 { 870 int rc; 871 872 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 873 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); 874 else 875 rc = bnx2i_570x_send_conn_ofld_req(hba, ep); 876 877 return rc; 878 } 879 880 881 /** 882 * setup_qp_page_tables - iscsi QP page table setup function 883 * @ep: endpoint (transport indentifier) structure 884 * 885 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires 886 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires 887 * PT in little endian format 888 */ 889 static void setup_qp_page_tables(struct bnx2i_endpoint *ep) 890 { 891 int num_pages; 892 u32 *ptbl; 893 dma_addr_t page; 894 int cnic_dev_10g; 895 896 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) 897 cnic_dev_10g = 1; 898 else 899 cnic_dev_10g = 0; 900 901 /* SQ page table */ 902 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); 903 num_pages = ep->qp.sq_mem_size / PAGE_SIZE; 904 page = ep->qp.sq_phys; 905 906 if (cnic_dev_10g) 907 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); 908 else 909 ptbl = (u32 *) ep->qp.sq_pgtbl_virt; 910 while (num_pages--) { 911 if (cnic_dev_10g) { 912 /* PTE is written in little endian format for 57710 */ 913 *ptbl = (u32) page; 914 ptbl++; 915 *ptbl = (u32) ((u64) page >> 32); 916 ptbl++; 917 page += PAGE_SIZE; 918 } else { 919 /* PTE is written in big endian format for 920 * 5706/5708/5709 devices */ 921 *ptbl = (u32) ((u64) page >> 32); 922 ptbl++; 923 *ptbl = (u32) page; 924 ptbl++; 925 page += PAGE_SIZE; 926 } 927 } 928 929 /* RQ page table */ 930 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); 931 num_pages = ep->qp.rq_mem_size / PAGE_SIZE; 932 page = ep->qp.rq_phys; 933 934 if (cnic_dev_10g) 935 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); 936 else 937 ptbl = (u32 *) ep->qp.rq_pgtbl_virt; 938 while (num_pages--) { 939 if (cnic_dev_10g) { 940 /* PTE is written in little endian format for 57710 */ 941 *ptbl = (u32) page; 942 ptbl++; 943 *ptbl = (u32) ((u64) page >> 32); 944 ptbl++; 945 page += PAGE_SIZE; 946 } else { 947 /* PTE is written in big endian format for 948 * 5706/5708/5709 devices */ 949 *ptbl = (u32) ((u64) page >> 32); 950 ptbl++; 951 *ptbl = (u32) page; 952 ptbl++; 953 page += PAGE_SIZE; 954 } 955 } 956 957 /* CQ page table */ 958 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); 959 num_pages = ep->qp.cq_mem_size / PAGE_SIZE; 960 page = ep->qp.cq_phys; 961 962 if (cnic_dev_10g) 963 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); 964 else 965 ptbl = (u32 *) ep->qp.cq_pgtbl_virt; 966 while (num_pages--) { 967 if (cnic_dev_10g) { 968 /* PTE is written in little endian format for 57710 */ 969 *ptbl = (u32) page; 970 ptbl++; 971 *ptbl = (u32) ((u64) page >> 32); 972 ptbl++; 973 page += PAGE_SIZE; 974 } else { 975 /* PTE is written in big endian format for 976 * 5706/5708/5709 devices */ 977 *ptbl = (u32) ((u64) page >> 32); 978 ptbl++; 979 *ptbl = (u32) page; 980 ptbl++; 981 page += PAGE_SIZE; 982 } 983 } 984 } 985 986 987 /** 988 * bnx2i_alloc_qp_resc - allocates required resources for QP. 989 * @hba: adapter structure pointer 990 * @ep: endpoint (transport indentifier) structure 991 * 992 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able 993 * memory for SQ/RQ/CQ and page tables. EP structure elements such 994 * as producer/consumer indexes/pointers, queue sizes and page table 995 * contents are setup 996 */ 997 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 998 { 999 struct bnx2i_5771x_cq_db *cq_db; 1000 1001 ep->hba = hba; 1002 ep->conn = NULL; 1003 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; 1004 1005 /* Allocate page table memory for SQ which is page aligned */ 1006 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; 1007 ep->qp.sq_mem_size = 1008 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1009 ep->qp.sq_pgtbl_size = 1010 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *); 1011 ep->qp.sq_pgtbl_size = 1012 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1013 1014 ep->qp.sq_pgtbl_virt = 1015 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1016 &ep->qp.sq_pgtbl_phys, GFP_KERNEL); 1017 if (!ep->qp.sq_pgtbl_virt) { 1018 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", 1019 ep->qp.sq_pgtbl_size); 1020 goto mem_alloc_err; 1021 } 1022 1023 /* Allocate memory area for actual SQ element */ 1024 ep->qp.sq_virt = 1025 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1026 &ep->qp.sq_phys, GFP_KERNEL); 1027 if (!ep->qp.sq_virt) { 1028 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", 1029 ep->qp.sq_mem_size); 1030 goto mem_alloc_err; 1031 } 1032 1033 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size); 1034 ep->qp.sq_first_qe = ep->qp.sq_virt; 1035 ep->qp.sq_prod_qe = ep->qp.sq_first_qe; 1036 ep->qp.sq_cons_qe = ep->qp.sq_first_qe; 1037 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; 1038 ep->qp.sq_prod_idx = 0; 1039 ep->qp.sq_cons_idx = 0; 1040 ep->qp.sqe_left = hba->max_sqes; 1041 1042 /* Allocate page table memory for CQ which is page aligned */ 1043 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; 1044 ep->qp.cq_mem_size = 1045 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1046 ep->qp.cq_pgtbl_size = 1047 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *); 1048 ep->qp.cq_pgtbl_size = 1049 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1050 1051 ep->qp.cq_pgtbl_virt = 1052 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1053 &ep->qp.cq_pgtbl_phys, GFP_KERNEL); 1054 if (!ep->qp.cq_pgtbl_virt) { 1055 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", 1056 ep->qp.cq_pgtbl_size); 1057 goto mem_alloc_err; 1058 } 1059 1060 /* Allocate memory area for actual CQ element */ 1061 ep->qp.cq_virt = 1062 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1063 &ep->qp.cq_phys, GFP_KERNEL); 1064 if (!ep->qp.cq_virt) { 1065 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", 1066 ep->qp.cq_mem_size); 1067 goto mem_alloc_err; 1068 } 1069 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size); 1070 1071 ep->qp.cq_first_qe = ep->qp.cq_virt; 1072 ep->qp.cq_prod_qe = ep->qp.cq_first_qe; 1073 ep->qp.cq_cons_qe = ep->qp.cq_first_qe; 1074 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; 1075 ep->qp.cq_prod_idx = 0; 1076 ep->qp.cq_cons_idx = 0; 1077 ep->qp.cqe_left = hba->max_cqes; 1078 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1079 ep->qp.cqe_size = hba->max_cqes; 1080 1081 /* Invalidate all EQ CQE index, req only for 57710 */ 1082 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; 1083 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); 1084 1085 /* Allocate page table memory for RQ which is page aligned */ 1086 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; 1087 ep->qp.rq_mem_size = 1088 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1089 ep->qp.rq_pgtbl_size = 1090 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *); 1091 ep->qp.rq_pgtbl_size = 1092 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK; 1093 1094 ep->qp.rq_pgtbl_virt = 1095 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1096 &ep->qp.rq_pgtbl_phys, GFP_KERNEL); 1097 if (!ep->qp.rq_pgtbl_virt) { 1098 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", 1099 ep->qp.rq_pgtbl_size); 1100 goto mem_alloc_err; 1101 } 1102 1103 /* Allocate memory area for actual RQ element */ 1104 ep->qp.rq_virt = 1105 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1106 &ep->qp.rq_phys, GFP_KERNEL); 1107 if (!ep->qp.rq_virt) { 1108 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", 1109 ep->qp.rq_mem_size); 1110 goto mem_alloc_err; 1111 } 1112 1113 ep->qp.rq_first_qe = ep->qp.rq_virt; 1114 ep->qp.rq_prod_qe = ep->qp.rq_first_qe; 1115 ep->qp.rq_cons_qe = ep->qp.rq_first_qe; 1116 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; 1117 ep->qp.rq_prod_idx = 0x8000; 1118 ep->qp.rq_cons_idx = 0; 1119 ep->qp.rqe_left = hba->max_rqes; 1120 1121 setup_qp_page_tables(ep); 1122 1123 return 0; 1124 1125 mem_alloc_err: 1126 bnx2i_free_qp_resc(hba, ep); 1127 return -ENOMEM; 1128 } 1129 1130 1131 1132 /** 1133 * bnx2i_free_qp_resc - free memory resources held by QP 1134 * @hba: adapter structure pointer 1135 * @ep: endpoint (transport indentifier) structure 1136 * 1137 * Free QP resources - SQ/RQ/CQ memory and page tables. 1138 */ 1139 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) 1140 { 1141 if (ep->qp.ctx_base) { 1142 iounmap(ep->qp.ctx_base); 1143 ep->qp.ctx_base = NULL; 1144 } 1145 /* Free SQ mem */ 1146 if (ep->qp.sq_pgtbl_virt) { 1147 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, 1148 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); 1149 ep->qp.sq_pgtbl_virt = NULL; 1150 ep->qp.sq_pgtbl_phys = 0; 1151 } 1152 if (ep->qp.sq_virt) { 1153 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, 1154 ep->qp.sq_virt, ep->qp.sq_phys); 1155 ep->qp.sq_virt = NULL; 1156 ep->qp.sq_phys = 0; 1157 } 1158 1159 /* Free RQ mem */ 1160 if (ep->qp.rq_pgtbl_virt) { 1161 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, 1162 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); 1163 ep->qp.rq_pgtbl_virt = NULL; 1164 ep->qp.rq_pgtbl_phys = 0; 1165 } 1166 if (ep->qp.rq_virt) { 1167 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, 1168 ep->qp.rq_virt, ep->qp.rq_phys); 1169 ep->qp.rq_virt = NULL; 1170 ep->qp.rq_phys = 0; 1171 } 1172 1173 /* Free CQ mem */ 1174 if (ep->qp.cq_pgtbl_virt) { 1175 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, 1176 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); 1177 ep->qp.cq_pgtbl_virt = NULL; 1178 ep->qp.cq_pgtbl_phys = 0; 1179 } 1180 if (ep->qp.cq_virt) { 1181 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, 1182 ep->qp.cq_virt, ep->qp.cq_phys); 1183 ep->qp.cq_virt = NULL; 1184 ep->qp.cq_phys = 0; 1185 } 1186 } 1187 1188 1189 /** 1190 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w 1191 * @hba: adapter structure pointer 1192 * 1193 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w 1194 * This results in iSCSi support validation and on-chip context manager 1195 * initialization. Firmware completes this handshake with a CQE carrying 1196 * the result of iscsi support validation. Parameter carried by 1197 * iscsi init request determines the number of offloaded connection and 1198 * tolerance level for iscsi protocol violation this hba/chip can support 1199 */ 1200 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) 1201 { 1202 struct kwqe *kwqe_arr[3]; 1203 struct iscsi_kwqe_init1 iscsi_init; 1204 struct iscsi_kwqe_init2 iscsi_init2; 1205 int rc = 0; 1206 u64 mask64; 1207 1208 bnx2i_adjust_qp_size(hba); 1209 1210 iscsi_init.flags = 1211 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; 1212 if (en_tcp_dack) 1213 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; 1214 iscsi_init.reserved0 = 0; 1215 iscsi_init.num_cqs = 1; 1216 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; 1217 iscsi_init.hdr.flags = 1218 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1219 1220 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; 1221 iscsi_init.dummy_buffer_addr_hi = 1222 (u32) ((u64) hba->dummy_buf_dma >> 32); 1223 1224 hba->ctx_ccell_tasks = 1225 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); 1226 iscsi_init.num_ccells_per_conn = hba->num_ccell; 1227 iscsi_init.num_tasks_per_conn = hba->max_sqes; 1228 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE; 1229 iscsi_init.sq_num_wqes = hba->max_sqes; 1230 iscsi_init.cq_log_wqes_per_page = 1231 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE); 1232 iscsi_init.cq_num_wqes = hba->max_cqes; 1233 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + 1234 (PAGE_SIZE - 1)) / PAGE_SIZE; 1235 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + 1236 (PAGE_SIZE - 1)) / PAGE_SIZE; 1237 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; 1238 iscsi_init.rq_num_wqes = hba->max_rqes; 1239 1240 1241 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; 1242 iscsi_init2.hdr.flags = 1243 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); 1244 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; 1245 mask64 = 0x0ULL; 1246 mask64 |= ( 1247 /* CISCO MDS */ 1248 (1UL << 1249 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | 1250 /* HP MSA1510i */ 1251 (1UL << 1252 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | 1253 /* EMC */ 1254 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); 1255 if (error_mask1) 1256 iscsi_init2.error_bit_map[0] = error_mask1; 1257 else 1258 iscsi_init2.error_bit_map[0] = (u32) mask64; 1259 1260 if (error_mask2) 1261 iscsi_init2.error_bit_map[1] = error_mask2; 1262 else 1263 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); 1264 1265 iscsi_error_mask = mask64; 1266 1267 kwqe_arr[0] = (struct kwqe *) &iscsi_init; 1268 kwqe_arr[1] = (struct kwqe *) &iscsi_init2; 1269 1270 if (hba->cnic && hba->cnic->submit_kwqes) 1271 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); 1272 return rc; 1273 } 1274 1275 1276 /** 1277 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. 1278 * @conn: iscsi connection 1279 * @cqe: pointer to newly DMA'ed CQE entry for processing 1280 * 1281 * process SCSI CMD Response CQE & complete the request to SCSI-ML 1282 */ 1283 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 1284 struct bnx2i_conn *bnx2i_conn, 1285 struct cqe *cqe) 1286 { 1287 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1288 struct bnx2i_cmd_response *resp_cqe; 1289 struct bnx2i_cmd *bnx2i_cmd; 1290 struct iscsi_task *task; 1291 struct iscsi_cmd_rsp *hdr; 1292 u32 datalen = 0; 1293 1294 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1295 spin_lock(&session->lock); 1296 task = iscsi_itt_to_task(conn, 1297 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); 1298 if (!task) 1299 goto fail; 1300 1301 bnx2i_cmd = task->dd_data; 1302 1303 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { 1304 conn->datain_pdus_cnt += 1305 resp_cqe->task_stat.read_stat.num_data_outs; 1306 conn->rxdata_octets += 1307 bnx2i_cmd->req.total_data_transfer_length; 1308 } else { 1309 conn->dataout_pdus_cnt += 1310 resp_cqe->task_stat.read_stat.num_data_outs; 1311 conn->r2t_pdus_cnt += 1312 resp_cqe->task_stat.read_stat.num_r2ts; 1313 conn->txdata_octets += 1314 bnx2i_cmd->req.total_data_transfer_length; 1315 } 1316 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); 1317 1318 hdr = (struct iscsi_cmd_rsp *)task->hdr; 1319 resp_cqe = (struct bnx2i_cmd_response *)cqe; 1320 hdr->opcode = resp_cqe->op_code; 1321 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); 1322 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); 1323 hdr->response = resp_cqe->response; 1324 hdr->cmd_status = resp_cqe->status; 1325 hdr->flags = resp_cqe->response_flags; 1326 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); 1327 1328 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) 1329 goto done; 1330 1331 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { 1332 datalen = resp_cqe->data_length; 1333 if (datalen < 2) 1334 goto done; 1335 1336 if (datalen > BNX2I_RQ_WQE_SIZE) { 1337 iscsi_conn_printk(KERN_ERR, conn, 1338 "sense data len %d > RQ sz\n", 1339 datalen); 1340 datalen = BNX2I_RQ_WQE_SIZE; 1341 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { 1342 iscsi_conn_printk(KERN_ERR, conn, 1343 "sense data len %d > conn data\n", 1344 datalen); 1345 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; 1346 } 1347 1348 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); 1349 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); 1350 } 1351 1352 done: 1353 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 1354 conn->data, datalen); 1355 fail: 1356 spin_unlock(&session->lock); 1357 return 0; 1358 } 1359 1360 1361 /** 1362 * bnx2i_process_login_resp - this function handles iscsi login response 1363 * @session: iscsi session pointer 1364 * @bnx2i_conn: iscsi connection pointer 1365 * @cqe: pointer to newly DMA'ed CQE entry for processing 1366 * 1367 * process Login Response CQE & complete it to open-iscsi user daemon 1368 */ 1369 static int bnx2i_process_login_resp(struct iscsi_session *session, 1370 struct bnx2i_conn *bnx2i_conn, 1371 struct cqe *cqe) 1372 { 1373 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1374 struct iscsi_task *task; 1375 struct bnx2i_login_response *login; 1376 struct iscsi_login_rsp *resp_hdr; 1377 int pld_len; 1378 int pad_len; 1379 1380 login = (struct bnx2i_login_response *) cqe; 1381 spin_lock(&session->lock); 1382 task = iscsi_itt_to_task(conn, 1383 login->itt & ISCSI_LOGIN_RESPONSE_INDEX); 1384 if (!task) 1385 goto done; 1386 1387 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1388 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1389 resp_hdr->opcode = login->op_code; 1390 resp_hdr->flags = login->response_flags; 1391 resp_hdr->max_version = login->version_max; 1392 resp_hdr->active_version = login->version_active; 1393 resp_hdr->hlength = 0; 1394 1395 hton24(resp_hdr->dlength, login->data_length); 1396 memcpy(resp_hdr->isid, &login->isid_lo, 6); 1397 resp_hdr->tsih = cpu_to_be16(login->tsih); 1398 resp_hdr->itt = task->hdr->itt; 1399 resp_hdr->statsn = cpu_to_be32(login->stat_sn); 1400 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); 1401 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); 1402 resp_hdr->status_class = login->status_class; 1403 resp_hdr->status_detail = login->status_detail; 1404 pld_len = login->data_length; 1405 bnx2i_conn->gen_pdu.resp_wr_ptr = 1406 bnx2i_conn->gen_pdu.resp_buf + pld_len; 1407 1408 pad_len = 0; 1409 if (pld_len & 0x3) 1410 pad_len = 4 - (pld_len % 4); 1411 1412 if (pad_len) { 1413 int i = 0; 1414 for (i = 0; i < pad_len; i++) { 1415 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; 1416 bnx2i_conn->gen_pdu.resp_wr_ptr++; 1417 } 1418 } 1419 1420 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, 1421 bnx2i_conn->gen_pdu.resp_buf, 1422 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); 1423 done: 1424 spin_unlock(&session->lock); 1425 return 0; 1426 } 1427 1428 /** 1429 * bnx2i_process_tmf_resp - this function handles iscsi TMF response 1430 * @session: iscsi session pointer 1431 * @bnx2i_conn: iscsi connection pointer 1432 * @cqe: pointer to newly DMA'ed CQE entry for processing 1433 * 1434 * process iSCSI TMF Response CQE and wake up the driver eh thread. 1435 */ 1436 static int bnx2i_process_tmf_resp(struct iscsi_session *session, 1437 struct bnx2i_conn *bnx2i_conn, 1438 struct cqe *cqe) 1439 { 1440 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1441 struct iscsi_task *task; 1442 struct bnx2i_tmf_response *tmf_cqe; 1443 struct iscsi_tm_rsp *resp_hdr; 1444 1445 tmf_cqe = (struct bnx2i_tmf_response *)cqe; 1446 spin_lock(&session->lock); 1447 task = iscsi_itt_to_task(conn, 1448 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); 1449 if (!task) 1450 goto done; 1451 1452 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1453 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1454 resp_hdr->opcode = tmf_cqe->op_code; 1455 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); 1456 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); 1457 resp_hdr->itt = task->hdr->itt; 1458 resp_hdr->response = tmf_cqe->response; 1459 1460 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1461 done: 1462 spin_unlock(&session->lock); 1463 return 0; 1464 } 1465 1466 /** 1467 * bnx2i_process_logout_resp - this function handles iscsi logout response 1468 * @session: iscsi session pointer 1469 * @bnx2i_conn: iscsi connection pointer 1470 * @cqe: pointer to newly DMA'ed CQE entry for processing 1471 * 1472 * process iSCSI Logout Response CQE & make function call to 1473 * notify the user daemon. 1474 */ 1475 static int bnx2i_process_logout_resp(struct iscsi_session *session, 1476 struct bnx2i_conn *bnx2i_conn, 1477 struct cqe *cqe) 1478 { 1479 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1480 struct iscsi_task *task; 1481 struct bnx2i_logout_response *logout; 1482 struct iscsi_logout_rsp *resp_hdr; 1483 1484 logout = (struct bnx2i_logout_response *) cqe; 1485 spin_lock(&session->lock); 1486 task = iscsi_itt_to_task(conn, 1487 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); 1488 if (!task) 1489 goto done; 1490 1491 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; 1492 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1493 resp_hdr->opcode = logout->op_code; 1494 resp_hdr->flags = logout->response; 1495 resp_hdr->hlength = 0; 1496 1497 resp_hdr->itt = task->hdr->itt; 1498 resp_hdr->statsn = task->hdr->exp_statsn; 1499 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); 1500 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); 1501 1502 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); 1503 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); 1504 1505 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 1506 1507 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; 1508 done: 1509 spin_unlock(&session->lock); 1510 return 0; 1511 } 1512 1513 /** 1514 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE 1515 * @session: iscsi session pointer 1516 * @bnx2i_conn: iscsi connection pointer 1517 * @cqe: pointer to newly DMA'ed CQE entry for processing 1518 * 1519 * process iSCSI NOPIN local completion CQE, frees IIT and command structures 1520 */ 1521 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, 1522 struct bnx2i_conn *bnx2i_conn, 1523 struct cqe *cqe) 1524 { 1525 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1526 struct bnx2i_nop_in_msg *nop_in; 1527 struct iscsi_task *task; 1528 1529 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1530 spin_lock(&session->lock); 1531 task = iscsi_itt_to_task(conn, 1532 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); 1533 if (task) 1534 __iscsi_put_task(task); 1535 spin_unlock(&session->lock); 1536 } 1537 1538 /** 1539 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd 1540 * @conn: iscsi connection 1541 * 1542 * Firmware advances RQ producer index for every unsolicited PDU even if 1543 * payload data length is '0'. This function makes corresponding 1544 * adjustments on the driver side to match this f/w behavior 1545 */ 1546 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) 1547 { 1548 char dummy_rq_data[2]; 1549 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); 1550 bnx2i_put_rq_buf(bnx2i_conn, 1); 1551 } 1552 1553 1554 /** 1555 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE 1556 * @session: iscsi session pointer 1557 * @bnx2i_conn: iscsi connection pointer 1558 * @cqe: pointer to newly DMA'ed CQE entry for processing 1559 * 1560 * process iSCSI target's proactive iSCSI NOPIN request 1561 */ 1562 static int bnx2i_process_nopin_mesg(struct iscsi_session *session, 1563 struct bnx2i_conn *bnx2i_conn, 1564 struct cqe *cqe) 1565 { 1566 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1567 struct iscsi_task *task; 1568 struct bnx2i_nop_in_msg *nop_in; 1569 struct iscsi_nopin *hdr; 1570 int tgt_async_nop = 0; 1571 1572 nop_in = (struct bnx2i_nop_in_msg *)cqe; 1573 1574 spin_lock(&session->lock); 1575 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; 1576 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1577 hdr->opcode = nop_in->op_code; 1578 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); 1579 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); 1580 hdr->ttt = cpu_to_be32(nop_in->ttt); 1581 1582 if (nop_in->itt == (u16) RESERVED_ITT) { 1583 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1584 hdr->itt = RESERVED_ITT; 1585 tgt_async_nop = 1; 1586 goto done; 1587 } 1588 1589 /* this is a response to one of our nop-outs */ 1590 task = iscsi_itt_to_task(conn, 1591 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); 1592 if (task) { 1593 hdr->flags = ISCSI_FLAG_CMD_FINAL; 1594 hdr->itt = task->hdr->itt; 1595 hdr->ttt = cpu_to_be32(nop_in->ttt); 1596 memcpy(hdr->lun, nop_in->lun, 8); 1597 } 1598 done: 1599 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); 1600 spin_unlock(&session->lock); 1601 1602 return tgt_async_nop; 1603 } 1604 1605 1606 /** 1607 * bnx2i_process_async_mesg - this function handles iscsi async message 1608 * @session: iscsi session pointer 1609 * @bnx2i_conn: iscsi connection pointer 1610 * @cqe: pointer to newly DMA'ed CQE entry for processing 1611 * 1612 * process iSCSI ASYNC Message 1613 */ 1614 static void bnx2i_process_async_mesg(struct iscsi_session *session, 1615 struct bnx2i_conn *bnx2i_conn, 1616 struct cqe *cqe) 1617 { 1618 struct bnx2i_async_msg *async_cqe; 1619 struct iscsi_async *resp_hdr; 1620 u8 async_event; 1621 1622 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1623 1624 async_cqe = (struct bnx2i_async_msg *)cqe; 1625 async_event = async_cqe->async_event; 1626 1627 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { 1628 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1629 "async: scsi events not supported\n"); 1630 return; 1631 } 1632 1633 spin_lock(&session->lock); 1634 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; 1635 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 1636 resp_hdr->opcode = async_cqe->op_code; 1637 resp_hdr->flags = 0x80; 1638 1639 memcpy(resp_hdr->lun, async_cqe->lun, 8); 1640 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); 1641 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); 1642 1643 resp_hdr->async_event = async_cqe->async_event; 1644 resp_hdr->async_vcode = async_cqe->async_vcode; 1645 1646 resp_hdr->param1 = cpu_to_be16(async_cqe->param1); 1647 resp_hdr->param2 = cpu_to_be16(async_cqe->param2); 1648 resp_hdr->param3 = cpu_to_be16(async_cqe->param3); 1649 1650 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, 1651 (struct iscsi_hdr *)resp_hdr, NULL, 0); 1652 spin_unlock(&session->lock); 1653 } 1654 1655 1656 /** 1657 * bnx2i_process_reject_mesg - process iscsi reject pdu 1658 * @session: iscsi session pointer 1659 * @bnx2i_conn: iscsi connection pointer 1660 * @cqe: pointer to newly DMA'ed CQE entry for processing 1661 * 1662 * process iSCSI REJECT message 1663 */ 1664 static void bnx2i_process_reject_mesg(struct iscsi_session *session, 1665 struct bnx2i_conn *bnx2i_conn, 1666 struct cqe *cqe) 1667 { 1668 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1669 struct bnx2i_reject_msg *reject; 1670 struct iscsi_reject *hdr; 1671 1672 reject = (struct bnx2i_reject_msg *) cqe; 1673 if (reject->data_length) { 1674 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); 1675 bnx2i_put_rq_buf(bnx2i_conn, 1); 1676 } else 1677 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1678 1679 spin_lock(&session->lock); 1680 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; 1681 memset(hdr, 0, sizeof(struct iscsi_hdr)); 1682 hdr->opcode = reject->op_code; 1683 hdr->reason = reject->reason; 1684 hton24(hdr->dlength, reject->data_length); 1685 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); 1686 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); 1687 hdr->ffffffff = cpu_to_be32(RESERVED_ITT); 1688 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, 1689 reject->data_length); 1690 spin_unlock(&session->lock); 1691 } 1692 1693 /** 1694 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion 1695 * @session: iscsi session pointer 1696 * @bnx2i_conn: iscsi connection pointer 1697 * @cqe: pointer to newly DMA'ed CQE entry for processing 1698 * 1699 * process command cleanup response CQE during conn shutdown or error recovery 1700 */ 1701 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, 1702 struct bnx2i_conn *bnx2i_conn, 1703 struct cqe *cqe) 1704 { 1705 struct bnx2i_cleanup_response *cmd_clean_rsp; 1706 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1707 struct iscsi_task *task; 1708 1709 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; 1710 spin_lock(&session->lock); 1711 task = iscsi_itt_to_task(conn, 1712 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1713 if (!task) 1714 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", 1715 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); 1716 spin_unlock(&session->lock); 1717 complete(&bnx2i_conn->cmd_cleanup_cmpl); 1718 } 1719 1720 1721 1722 /** 1723 * bnx2i_process_new_cqes - process newly DMA'ed CQE's 1724 * @bnx2i_conn: iscsi connection 1725 * 1726 * this function is called by generic KCQ handler to process all pending CQE's 1727 */ 1728 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) 1729 { 1730 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; 1731 struct iscsi_session *session = conn->session; 1732 struct qp_info *qp = &bnx2i_conn->ep->qp; 1733 struct bnx2i_nop_in_msg *nopin; 1734 int tgt_async_msg; 1735 1736 while (1) { 1737 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; 1738 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) 1739 break; 1740 1741 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { 1742 if (nopin->op_code == ISCSI_OP_NOOP_IN && 1743 nopin->itt == (u16) RESERVED_ITT) { 1744 printk(KERN_ALERT "bnx2i: Unsolicited " 1745 "NOP-In detected for suspended " 1746 "connection dev=%s!\n", 1747 bnx2i_conn->hba->netdev->name); 1748 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); 1749 goto cqe_out; 1750 } 1751 break; 1752 } 1753 tgt_async_msg = 0; 1754 1755 switch (nopin->op_code) { 1756 case ISCSI_OP_SCSI_CMD_RSP: 1757 case ISCSI_OP_SCSI_DATA_IN: 1758 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, 1759 qp->cq_cons_qe); 1760 break; 1761 case ISCSI_OP_LOGIN_RSP: 1762 bnx2i_process_login_resp(session, bnx2i_conn, 1763 qp->cq_cons_qe); 1764 break; 1765 case ISCSI_OP_SCSI_TMFUNC_RSP: 1766 bnx2i_process_tmf_resp(session, bnx2i_conn, 1767 qp->cq_cons_qe); 1768 break; 1769 case ISCSI_OP_LOGOUT_RSP: 1770 bnx2i_process_logout_resp(session, bnx2i_conn, 1771 qp->cq_cons_qe); 1772 break; 1773 case ISCSI_OP_NOOP_IN: 1774 if (bnx2i_process_nopin_mesg(session, bnx2i_conn, 1775 qp->cq_cons_qe)) 1776 tgt_async_msg = 1; 1777 break; 1778 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: 1779 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, 1780 qp->cq_cons_qe); 1781 break; 1782 case ISCSI_OP_ASYNC_EVENT: 1783 bnx2i_process_async_mesg(session, bnx2i_conn, 1784 qp->cq_cons_qe); 1785 tgt_async_msg = 1; 1786 break; 1787 case ISCSI_OP_REJECT: 1788 bnx2i_process_reject_mesg(session, bnx2i_conn, 1789 qp->cq_cons_qe); 1790 break; 1791 case ISCSI_OPCODE_CLEANUP_RESPONSE: 1792 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, 1793 qp->cq_cons_qe); 1794 break; 1795 default: 1796 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 1797 nopin->op_code); 1798 } 1799 if (!tgt_async_msg) 1800 bnx2i_conn->ep->num_active_cmds--; 1801 cqe_out: 1802 /* clear out in production version only, till beta keep opcode 1803 * field intact, will be helpful in debugging (context dump) 1804 * nopin->op_code = 0; 1805 */ 1806 qp->cqe_exp_seq_sn++; 1807 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) 1808 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; 1809 1810 if (qp->cq_cons_qe == qp->cq_last_qe) { 1811 qp->cq_cons_qe = qp->cq_first_qe; 1812 qp->cq_cons_idx = 0; 1813 } else { 1814 qp->cq_cons_qe++; 1815 qp->cq_cons_idx++; 1816 } 1817 } 1818 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE); 1819 } 1820 1821 /** 1822 * bnx2i_fastpath_notification - process global event queue (KCQ) 1823 * @hba: adapter structure pointer 1824 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry 1825 * 1826 * Fast path event notification handler, KCQ entry carries context id 1827 * of the connection that has 1 or more pending CQ entries 1828 */ 1829 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, 1830 struct iscsi_kcqe *new_cqe_kcqe) 1831 { 1832 struct bnx2i_conn *conn; 1833 u32 iscsi_cid; 1834 1835 iscsi_cid = new_cqe_kcqe->iscsi_conn_id; 1836 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 1837 1838 if (!conn) { 1839 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); 1840 return; 1841 } 1842 if (!conn->ep) { 1843 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); 1844 return; 1845 } 1846 1847 bnx2i_process_new_cqes(conn); 1848 } 1849 1850 1851 /** 1852 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE 1853 * @hba: adapter structure pointer 1854 * @update_kcqe: kcqe pointer 1855 * 1856 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration 1857 */ 1858 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, 1859 struct iscsi_kcqe *update_kcqe) 1860 { 1861 struct bnx2i_conn *conn; 1862 u32 iscsi_cid; 1863 1864 iscsi_cid = update_kcqe->iscsi_conn_id; 1865 conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 1866 1867 if (!conn) { 1868 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); 1869 return; 1870 } 1871 if (!conn->ep) { 1872 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); 1873 return; 1874 } 1875 1876 if (update_kcqe->completion_status) { 1877 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); 1878 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; 1879 } else 1880 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; 1881 1882 wake_up_interruptible(&conn->ep->ofld_wait); 1883 } 1884 1885 1886 /** 1887 * bnx2i_recovery_que_add_conn - add connection to recovery queue 1888 * @hba: adapter structure pointer 1889 * @bnx2i_conn: iscsi connection 1890 * 1891 * Add connection to recovery queue and schedule adapter eh worker 1892 */ 1893 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, 1894 struct bnx2i_conn *bnx2i_conn) 1895 { 1896 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, 1897 ISCSI_ERR_CONN_FAILED); 1898 } 1899 1900 1901 /** 1902 * bnx2i_process_tcp_error - process error notification on a given connection 1903 * 1904 * @hba: adapter structure pointer 1905 * @tcp_err: tcp error kcqe pointer 1906 * 1907 * handles tcp level error notifications from FW. 1908 */ 1909 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, 1910 struct iscsi_kcqe *tcp_err) 1911 { 1912 struct bnx2i_conn *bnx2i_conn; 1913 u32 iscsi_cid; 1914 1915 iscsi_cid = tcp_err->iscsi_conn_id; 1916 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 1917 1918 if (!bnx2i_conn) { 1919 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 1920 return; 1921 } 1922 1923 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", 1924 iscsi_cid, tcp_err->completion_status); 1925 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 1926 } 1927 1928 1929 /** 1930 * bnx2i_process_iscsi_error - process error notification on a given connection 1931 * @hba: adapter structure pointer 1932 * @iscsi_err: iscsi error kcqe pointer 1933 * 1934 * handles iscsi error notifications from the FW. Firmware based in initial 1935 * handshake classifies iscsi protocol / TCP rfc violation into either 1936 * warning or error indications. If indication is of "Error" type, driver 1937 * will initiate session recovery for that connection/session. For 1938 * "Warning" type indication, driver will put out a system log message 1939 * (there will be only one message for each type for the life of the 1940 * session, this is to avoid un-necessarily overloading the system) 1941 */ 1942 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, 1943 struct iscsi_kcqe *iscsi_err) 1944 { 1945 struct bnx2i_conn *bnx2i_conn; 1946 u32 iscsi_cid; 1947 char warn_notice[] = "iscsi_warning"; 1948 char error_notice[] = "iscsi_error"; 1949 char additional_notice[64]; 1950 char *message; 1951 int need_recovery; 1952 u64 err_mask64; 1953 1954 iscsi_cid = iscsi_err->iscsi_conn_id; 1955 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); 1956 if (!bnx2i_conn) { 1957 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); 1958 return; 1959 } 1960 1961 err_mask64 = (0x1ULL << iscsi_err->completion_status); 1962 1963 if (err_mask64 & iscsi_error_mask) { 1964 need_recovery = 0; 1965 message = warn_notice; 1966 } else { 1967 need_recovery = 1; 1968 message = error_notice; 1969 } 1970 1971 switch (iscsi_err->completion_status) { 1972 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: 1973 strcpy(additional_notice, "hdr digest err"); 1974 break; 1975 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: 1976 strcpy(additional_notice, "data digest err"); 1977 break; 1978 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: 1979 strcpy(additional_notice, "wrong opcode rcvd"); 1980 break; 1981 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: 1982 strcpy(additional_notice, "AHS len > 0 rcvd"); 1983 break; 1984 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: 1985 strcpy(additional_notice, "invalid ITT rcvd"); 1986 break; 1987 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: 1988 strcpy(additional_notice, "wrong StatSN rcvd"); 1989 break; 1990 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: 1991 strcpy(additional_notice, "wrong DataSN rcvd"); 1992 break; 1993 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: 1994 strcpy(additional_notice, "pend R2T violation"); 1995 break; 1996 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: 1997 strcpy(additional_notice, "ERL0, UO"); 1998 break; 1999 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: 2000 strcpy(additional_notice, "ERL0, U1"); 2001 break; 2002 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: 2003 strcpy(additional_notice, "ERL0, U2"); 2004 break; 2005 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: 2006 strcpy(additional_notice, "ERL0, U3"); 2007 break; 2008 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: 2009 strcpy(additional_notice, "ERL0, U4"); 2010 break; 2011 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: 2012 strcpy(additional_notice, "ERL0, U5"); 2013 break; 2014 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: 2015 strcpy(additional_notice, "ERL0, U6"); 2016 break; 2017 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: 2018 strcpy(additional_notice, "invalid resi len"); 2019 break; 2020 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: 2021 strcpy(additional_notice, "MRDSL violation"); 2022 break; 2023 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: 2024 strcpy(additional_notice, "F-bit not set"); 2025 break; 2026 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: 2027 strcpy(additional_notice, "invalid TTT"); 2028 break; 2029 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: 2030 strcpy(additional_notice, "invalid DataSN"); 2031 break; 2032 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: 2033 strcpy(additional_notice, "burst len violation"); 2034 break; 2035 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: 2036 strcpy(additional_notice, "buf offset violation"); 2037 break; 2038 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: 2039 strcpy(additional_notice, "invalid LUN field"); 2040 break; 2041 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: 2042 strcpy(additional_notice, "invalid R2TSN field"); 2043 break; 2044 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ 2045 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 2046 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: 2047 strcpy(additional_notice, "invalid cmd len1"); 2048 break; 2049 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ 2050 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 2051 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: 2052 strcpy(additional_notice, "invalid cmd len2"); 2053 break; 2054 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: 2055 strcpy(additional_notice, 2056 "pend r2t exceeds MaxOutstandingR2T value"); 2057 break; 2058 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: 2059 strcpy(additional_notice, "TTT is rsvd"); 2060 break; 2061 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: 2062 strcpy(additional_notice, "MBL violation"); 2063 break; 2064 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ 2065 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO 2066 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: 2067 strcpy(additional_notice, "data seg len != 0"); 2068 break; 2069 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: 2070 strcpy(additional_notice, "reject pdu len error"); 2071 break; 2072 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: 2073 strcpy(additional_notice, "async pdu len error"); 2074 break; 2075 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: 2076 strcpy(additional_notice, "nopin pdu len error"); 2077 break; 2078 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \ 2079 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP 2080 case BNX2_ERR_PEND_R2T_IN_CLEANUP: 2081 strcpy(additional_notice, "pend r2t in cleanup"); 2082 break; 2083 2084 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: 2085 strcpy(additional_notice, "IP fragments rcvd"); 2086 break; 2087 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: 2088 strcpy(additional_notice, "IP options error"); 2089 break; 2090 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: 2091 strcpy(additional_notice, "urgent flag error"); 2092 break; 2093 default: 2094 printk(KERN_ALERT "iscsi_err - unknown err %x\n", 2095 iscsi_err->completion_status); 2096 } 2097 2098 if (need_recovery) { 2099 iscsi_conn_printk(KERN_ALERT, 2100 bnx2i_conn->cls_conn->dd_data, 2101 "bnx2i: %s - %s\n", 2102 message, additional_notice); 2103 2104 iscsi_conn_printk(KERN_ALERT, 2105 bnx2i_conn->cls_conn->dd_data, 2106 "conn_err - hostno %d conn %p, " 2107 "iscsi_cid %x cid %x\n", 2108 bnx2i_conn->hba->shost->host_no, 2109 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, 2110 bnx2i_conn->ep->ep_cid); 2111 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); 2112 } else 2113 if (!test_and_set_bit(iscsi_err->completion_status, 2114 (void *) &bnx2i_conn->violation_notified)) 2115 iscsi_conn_printk(KERN_ALERT, 2116 bnx2i_conn->cls_conn->dd_data, 2117 "bnx2i: %s - %s\n", 2118 message, additional_notice); 2119 } 2120 2121 2122 /** 2123 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion 2124 * @hba: adapter structure pointer 2125 * @conn_destroy: conn destroy kcqe pointer 2126 * 2127 * handles connection destroy completion request. 2128 */ 2129 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, 2130 struct iscsi_kcqe *conn_destroy) 2131 { 2132 struct bnx2i_endpoint *ep; 2133 2134 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); 2135 if (!ep) { 2136 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " 2137 "offload request, unexpected complection\n"); 2138 return; 2139 } 2140 2141 if (hba != ep->hba) { 2142 printk(KERN_ALERT "conn destroy- error hba mis-match\n"); 2143 return; 2144 } 2145 2146 if (conn_destroy->completion_status) { 2147 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); 2148 ep->state = EP_STATE_CLEANUP_FAILED; 2149 } else 2150 ep->state = EP_STATE_CLEANUP_CMPL; 2151 wake_up_interruptible(&ep->ofld_wait); 2152 } 2153 2154 2155 /** 2156 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion 2157 * @hba: adapter structure pointer 2158 * @ofld_kcqe: conn offload kcqe pointer 2159 * 2160 * handles initial connection offload completion, ep_connect() thread is 2161 * woken-up to continue with LLP connect process 2162 */ 2163 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, 2164 struct iscsi_kcqe *ofld_kcqe) 2165 { 2166 u32 cid_addr; 2167 struct bnx2i_endpoint *ep; 2168 u32 cid_num; 2169 2170 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); 2171 if (!ep) { 2172 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); 2173 return; 2174 } 2175 2176 if (hba != ep->hba) { 2177 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n"); 2178 return; 2179 } 2180 2181 if (ofld_kcqe->completion_status) { 2182 ep->state = EP_STATE_OFLD_FAILED; 2183 if (ofld_kcqe->completion_status == 2184 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) 2185 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " 2186 "to allocate iSCSI context resources\n", 2187 hba->netdev->name); 2188 else if (ofld_kcqe->completion_status == 2189 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) 2190 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2191 "opcode\n", hba->netdev->name); 2192 else if (ofld_kcqe->completion_status == 2193 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) 2194 /* error status code valid only for 5771x chipset */ 2195 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; 2196 else 2197 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " 2198 "error code %d\n", hba->netdev->name, 2199 ofld_kcqe->completion_status); 2200 } else { 2201 ep->state = EP_STATE_OFLD_COMPL; 2202 cid_addr = ofld_kcqe->iscsi_conn_context_id; 2203 cid_num = bnx2i_get_cid_num(ep); 2204 ep->ep_cid = cid_addr; 2205 ep->qp.ctx_base = NULL; 2206 } 2207 wake_up_interruptible(&ep->ofld_wait); 2208 } 2209 2210 /** 2211 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE 2212 * @hba: adapter structure pointer 2213 * @update_kcqe: kcqe pointer 2214 * 2215 * Generic KCQ event handler/dispatcher 2216 */ 2217 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], 2218 u32 num_cqe) 2219 { 2220 struct bnx2i_hba *hba = context; 2221 int i = 0; 2222 struct iscsi_kcqe *ikcqe = NULL; 2223 2224 while (i < num_cqe) { 2225 ikcqe = (struct iscsi_kcqe *) kcqe[i++]; 2226 2227 if (ikcqe->op_code == 2228 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) 2229 bnx2i_fastpath_notification(hba, ikcqe); 2230 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) 2231 bnx2i_process_ofld_cmpl(hba, ikcqe); 2232 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) 2233 bnx2i_process_update_conn_cmpl(hba, ikcqe); 2234 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { 2235 if (ikcqe->completion_status != 2236 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) 2237 bnx2i_iscsi_license_error(hba, ikcqe->\ 2238 completion_status); 2239 else { 2240 set_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2241 bnx2i_get_link_state(hba); 2242 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " 2243 "ISCSI_INIT passed\n", 2244 (u8)hba->pcidev->bus->number, 2245 hba->pci_devno, 2246 (u8)hba->pci_func); 2247 2248 2249 } 2250 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) 2251 bnx2i_process_conn_destroy_cmpl(hba, ikcqe); 2252 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) 2253 bnx2i_process_iscsi_error(hba, ikcqe); 2254 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) 2255 bnx2i_process_tcp_error(hba, ikcqe); 2256 else 2257 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", 2258 ikcqe->op_code); 2259 } 2260 } 2261 2262 2263 /** 2264 * bnx2i_indicate_netevent - Generic netdev event handler 2265 * @context: adapter structure pointer 2266 * @event: event type 2267 * 2268 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, 2269 * NETDEV_GOING_DOWN and NETDEV_CHANGE 2270 */ 2271 static void bnx2i_indicate_netevent(void *context, unsigned long event) 2272 { 2273 struct bnx2i_hba *hba = context; 2274 2275 switch (event) { 2276 case NETDEV_UP: 2277 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2278 bnx2i_send_fw_iscsi_init_msg(hba); 2279 break; 2280 case NETDEV_DOWN: 2281 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2282 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); 2283 break; 2284 case NETDEV_GOING_DOWN: 2285 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); 2286 iscsi_host_for_each_session(hba->shost, 2287 bnx2i_drop_session); 2288 break; 2289 case NETDEV_CHANGE: 2290 bnx2i_get_link_state(hba); 2291 break; 2292 default: 2293 ; 2294 } 2295 } 2296 2297 2298 /** 2299 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion 2300 * @cm_sk: cnic sock structure pointer 2301 * 2302 * function callback exported via bnx2i - cnic driver interface to 2303 * indicate completion of option-2 TCP connect request. 2304 */ 2305 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) 2306 { 2307 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2308 2309 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 2310 ep->state = EP_STATE_CONNECT_FAILED; 2311 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) 2312 ep->state = EP_STATE_CONNECT_COMPL; 2313 else 2314 ep->state = EP_STATE_CONNECT_FAILED; 2315 2316 wake_up_interruptible(&ep->ofld_wait); 2317 } 2318 2319 2320 /** 2321 * bnx2i_cm_close_cmpl - process tcp conn close completion 2322 * @cm_sk: cnic sock structure pointer 2323 * 2324 * function callback exported via bnx2i - cnic driver interface to 2325 * indicate completion of option-2 graceful TCP connect shutdown 2326 */ 2327 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) 2328 { 2329 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2330 2331 ep->state = EP_STATE_DISCONN_COMPL; 2332 wake_up_interruptible(&ep->ofld_wait); 2333 } 2334 2335 2336 /** 2337 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion 2338 * @cm_sk: cnic sock structure pointer 2339 * 2340 * function callback exported via bnx2i - cnic driver interface to 2341 * indicate completion of option-2 abortive TCP connect termination 2342 */ 2343 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) 2344 { 2345 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2346 2347 ep->state = EP_STATE_DISCONN_COMPL; 2348 wake_up_interruptible(&ep->ofld_wait); 2349 } 2350 2351 2352 /** 2353 * bnx2i_cm_remote_close - process received TCP FIN 2354 * @hba: adapter structure pointer 2355 * @update_kcqe: kcqe pointer 2356 * 2357 * function callback exported via bnx2i - cnic driver interface to indicate 2358 * async TCP events such as FIN 2359 */ 2360 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) 2361 { 2362 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2363 2364 ep->state = EP_STATE_TCP_FIN_RCVD; 2365 if (ep->conn) 2366 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2367 } 2368 2369 /** 2370 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup 2371 * @hba: adapter structure pointer 2372 * @update_kcqe: kcqe pointer 2373 * 2374 * function callback exported via bnx2i - cnic driver interface to 2375 * indicate async TCP events (RST) sent by the peer. 2376 */ 2377 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) 2378 { 2379 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; 2380 u32 old_state = ep->state; 2381 2382 ep->state = EP_STATE_TCP_RST_RCVD; 2383 if (old_state == EP_STATE_DISCONN_START) 2384 wake_up_interruptible(&ep->ofld_wait); 2385 else 2386 if (ep->conn) 2387 bnx2i_recovery_que_add_conn(ep->hba, ep->conn); 2388 } 2389 2390 2391 static int bnx2i_send_nl_mesg(void *context, u32 msg_type, 2392 char *buf, u16 buflen) 2393 { 2394 struct bnx2i_hba *hba = context; 2395 int rc; 2396 2397 if (!hba) 2398 return -ENODEV; 2399 2400 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, 2401 msg_type, buf, buflen); 2402 if (rc) 2403 printk(KERN_ALERT "bnx2i: private nl message send error\n"); 2404 2405 return rc; 2406 } 2407 2408 2409 /** 2410 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure 2411 * carrying callback function pointers 2412 * 2413 */ 2414 struct cnic_ulp_ops bnx2i_cnic_cb = { 2415 .cnic_init = bnx2i_ulp_init, 2416 .cnic_exit = bnx2i_ulp_exit, 2417 .cnic_start = bnx2i_start, 2418 .cnic_stop = bnx2i_stop, 2419 .indicate_kcqes = bnx2i_indicate_kcqe, 2420 .indicate_netevent = bnx2i_indicate_netevent, 2421 .cm_connect_complete = bnx2i_cm_connect_cmpl, 2422 .cm_close_complete = bnx2i_cm_close_cmpl, 2423 .cm_abort_complete = bnx2i_cm_abort_cmpl, 2424 .cm_remote_close = bnx2i_cm_remote_close, 2425 .cm_remote_abort = bnx2i_cm_remote_abort, 2426 .iscsi_nl_send_msg = bnx2i_send_nl_mesg, 2427 .owner = THIS_MODULE 2428 }; 2429 2430 2431 /** 2432 * bnx2i_map_ep_dbell_regs - map connection doorbell registers 2433 * @ep: bnx2i endpoint 2434 * 2435 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these 2436 * register in BAR #0. Whereas in 57710 these register are accessed by 2437 * mapping BAR #1 2438 */ 2439 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) 2440 { 2441 u32 cid_num; 2442 u32 reg_off; 2443 u32 first_l4l5; 2444 u32 ctx_sz; 2445 u32 config2; 2446 resource_size_t reg_base; 2447 2448 cid_num = bnx2i_get_cid_num(ep); 2449 2450 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { 2451 reg_base = pci_resource_start(ep->hba->pcidev, 2452 BNX2X_DOORBELL_PCI_BAR); 2453 reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) + 2454 DPM_TRIGER_TYPE; 2455 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4); 2456 goto arm_cq; 2457 } 2458 2459 reg_base = ep->hba->netdev->base_addr; 2460 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && 2461 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { 2462 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); 2463 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; 2464 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; 2465 if (ctx_sz) 2466 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE 2467 + BNX2I_570X_PAGE_SIZE_DEFAULT * 2468 (((cid_num - first_l4l5) / ctx_sz) + 256); 2469 else 2470 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2471 } else 2472 /* 5709 device in normal node and 5706/5708 devices */ 2473 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); 2474 2475 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 2476 MB_KERNEL_CTX_SIZE); 2477 if (!ep->qp.ctx_base) 2478 return -ENOMEM; 2479 2480 arm_cq: 2481 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); 2482 return 0; 2483 } 2484