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Following a link up event, the LUNs available to the host may have changed. Without rescanning the host, the LUN topology is unknown to the user. In such a state, the user would be unable to locate provisioned resources. To remedy, the host should be rescanned after a link up event. Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com> Reviewed-by: Brian King <brking@linux.vnet.ibm.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
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* CXL Flash Device Driver
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*
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* Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation
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* Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
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*
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* Copyright (C) 2015 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _CXLFLASH_MAIN_H
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#define _CXLFLASH_MAIN_H
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#include <linux/list.h>
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#include <linux/types.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
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#define CXLFLASH_NAME "cxlflash"
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#define CXLFLASH_ADAPTER_NAME "IBM POWER CXL Flash Adapter"
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#define CXLFLASH_DRIVER_DATE "(August 13, 2015)"
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#define PCI_DEVICE_ID_IBM_CORSA 0x04F0
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#define CXLFLASH_SUBS_DEV_ID 0x04F0
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/* Since there is only one target, make it 0 */
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#define CXLFLASH_TARGET 0
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#define CXLFLASH_MAX_CDB_LEN 16
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/* Really only one target per bus since the Texan is directly attached */
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#define CXLFLASH_MAX_NUM_TARGETS_PER_BUS 1
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#define CXLFLASH_MAX_NUM_LUNS_PER_TARGET 65536
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#define CXLFLASH_PCI_ERROR_RECOVERY_TIMEOUT (120 * HZ)
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#define NUM_FC_PORTS CXLFLASH_NUM_FC_PORTS /* ports per AFU */
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/* FC defines */
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#define FC_MTIP_CMDCONFIG 0x010
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#define FC_MTIP_STATUS 0x018
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#define FC_PNAME 0x300
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#define FC_CONFIG 0x320
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#define FC_CONFIG2 0x328
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#define FC_STATUS 0x330
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#define FC_ERROR 0x380
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#define FC_ERRCAP 0x388
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#define FC_ERRMSK 0x390
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#define FC_CNT_CRCERR 0x538
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#define FC_CRC_THRESH 0x580
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#define FC_MTIP_CMDCONFIG_ONLINE 0x20ULL
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#define FC_MTIP_CMDCONFIG_OFFLINE 0x40ULL
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#define FC_MTIP_STATUS_MASK 0x30ULL
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#define FC_MTIP_STATUS_ONLINE 0x20ULL
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#define FC_MTIP_STATUS_OFFLINE 0x10ULL
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/* TIMEOUT and RETRY definitions */
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/* AFU command timeout values */
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#define MC_AFU_SYNC_TIMEOUT 5 /* 5 secs */
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/* AFU command room retry limit */
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#define MC_ROOM_RETRY_CNT 10
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/* FC CRC clear periodic timer */
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#define MC_CRC_THRESH 100 /* threshold in 5 mins */
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#define FC_PORT_STATUS_RETRY_CNT 100 /* 100 100ms retries = 10 seconds */
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#define FC_PORT_STATUS_RETRY_INTERVAL_US 100000 /* microseconds */
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/* VPD defines */
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#define CXLFLASH_VPD_LEN 256
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#define WWPN_LEN 16
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#define WWPN_BUF_LEN (WWPN_LEN + 1)
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enum undo_level {
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RELEASE_CONTEXT = 0,
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FREE_IRQ,
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UNMAP_ONE,
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UNMAP_TWO,
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UNMAP_THREE,
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UNDO_START
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};
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struct dev_dependent_vals {
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u64 max_sectors;
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};
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struct asyc_intr_info {
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u64 status;
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char *desc;
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u8 port;
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u8 action;
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#define CLR_FC_ERROR 0x01
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#define LINK_RESET 0x02
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#define SCAN_HOST 0x04
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};
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#ifndef CONFIG_CXL_EEH
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#define cxl_perst_reloads_same_image(_a, _b) do { } while (0)
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#endif
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#endif /* _CXLFLASH_MAIN_H */
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