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scsi: cxlflash: Staging to support future accelerators

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As staging to support future accelerator transports, add a shim layer
such that the underlying services the cxlflash driver requires can be
conditional upon the accelerator infrastructure.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Matthew R. Ochs
2018-01-03 16:55:26 -06:00
committed by Martin K. Petersen
parent 0df69c6024
commit 25b8e08e83
6 changed files with 263 additions and 78 deletions
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41
drivers/scsi/cxlflash/backend.h Normal file
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/*
* CXL Flash Device Driver
*
* Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
* Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
*
* Copyright (C) 2018 IBM Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
extern const struct cxlflash_backend_ops cxlflash_cxl_ops;
struct cxlflash_backend_ops {
struct module *module;
void __iomem * (*psa_map)(void *);
void (*psa_unmap)(void __iomem *);
int (*process_element)(void *);
int (*map_afu_irq)(void *, int, irq_handler_t, void *, char *);
void (*unmap_afu_irq)(void *, int, void *);
int (*start_context)(void *);
int (*stop_context)(void *);
int (*afu_reset)(void *);
void (*set_master)(void *);
void * (*get_context)(struct pci_dev *, void *);
void * (*dev_context_init)(struct pci_dev *, void *);
int (*release_context)(void *);
void (*perst_reloads_same_image)(void *, bool);
ssize_t (*read_adapter_vpd)(struct pci_dev *, void *, size_t);
int (*allocate_afu_irqs)(void *, int);
void (*free_afu_irqs)(void *);
void * (*create_afu)(struct pci_dev *);
struct file * (*get_fd)(void *, struct file_operations *, int *);
void * (*fops_get_context)(struct file *);
int (*start_work)(void *, u64);
int (*fd_mmap)(struct file *, struct vm_area_struct *);
int (*fd_release)(struct inode *, struct file *);
};