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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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cd43c221bb
Depending on the underlying transport, cxlflash has a dependency on either the CXL or OCXL drivers, which are enabled via their Kconfig option. Instead of having a module wide dependency on these config options, it is better to isolate the object modules that are dependent on the CXL and OCXL drivers and adjust the module dependencies accordingly. This commit isolates the object files that are dependent on CXL and/or OCXL. The cxl/ocxl fops used in the core driver are tucked under an ifdef to avoid compilation errors. Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com> Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
134 lines
3.4 KiB
C
134 lines
3.4 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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#include "backend.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_MAX_ADAPTERS 32
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#define PCI_DEVICE_ID_IBM_CORSA 0x04F0
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#define PCI_DEVICE_ID_IBM_FLASH_GT 0x0600
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#define PCI_DEVICE_ID_IBM_BRIARD 0x0624
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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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/* 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_MAX_NUM_LUNS 0x080 /* Max LUNs host can provision for port */
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#define FC_CUR_NUM_LUNS 0x088 /* Cur number LUNs provisioned for port */
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#define FC_MAX_CAP_PORT 0x090 /* Max capacity all LUNs for port (4K blocks) */
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#define FC_CUR_CAP_PORT 0x098 /* Cur capacity all LUNs for port (4K blocks) */
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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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#define MC_LUN_PROV_TIMEOUT 5 /* 5 secs */
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#define MC_AFU_DEBUG_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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UNDO_NOOP = 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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};
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struct dev_dependent_vals {
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u64 max_sectors;
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u64 flags;
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#define CXLFLASH_NOTIFY_SHUTDOWN 0x0000000000000001ULL
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#define CXLFLASH_WWPN_VPD_REQUIRED 0x0000000000000002ULL
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#define CXLFLASH_OCXL_DEV 0x0000000000000004ULL
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};
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static inline const struct cxlflash_backend_ops *
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cxlflash_assign_ops(struct dev_dependent_vals *ddv)
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{
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const struct cxlflash_backend_ops *ops = NULL;
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#ifdef CONFIG_OCXL
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if (ddv->flags & CXLFLASH_OCXL_DEV)
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ops = &cxlflash_ocxl_ops;
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#endif
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#ifdef CONFIG_CXL
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if (!(ddv->flags & CXLFLASH_OCXL_DEV))
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ops = &cxlflash_cxl_ops;
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#endif
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return ops;
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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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#endif /* _CXLFLASH_MAIN_H */
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