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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.
*/
#include <misc/cxl.h>
#include "backend.h"
/*
* The following routines map the cxlflash backend operations to existing CXL
* kernel API function and are largely simple shims that provide an abstraction
* for converting generic context and AFU cookies into cxl_context or cxl_afu
* pointers.
*/
static void __iomem *cxlflash_psa_map(void *ctx_cookie)
{
return cxl_psa_map(ctx_cookie);
}
static void cxlflash_psa_unmap(void __iomem *addr)
{
cxl_psa_unmap(addr);
}
static int cxlflash_process_element(void *ctx_cookie)
{
return cxl_process_element(ctx_cookie);
}
static int cxlflash_map_afu_irq(void *ctx_cookie, int num,
irq_handler_t handler, void *cookie, char *name)
{
return cxl_map_afu_irq(ctx_cookie, num, handler, cookie, name);
}
static void cxlflash_unmap_afu_irq(void *ctx_cookie, int num, void *cookie)
{
cxl_unmap_afu_irq(ctx_cookie, num, cookie);
}
static u64 cxlflash_get_irq_objhndl(void *ctx_cookie, int irq)
{
/* Dummy fop for cxl */
return 0;
}
static int cxlflash_start_context(void *ctx_cookie)
{
return cxl_start_context(ctx_cookie, 0, NULL);
}
static int cxlflash_stop_context(void *ctx_cookie)
{
return cxl_stop_context(ctx_cookie);
}
static int cxlflash_afu_reset(void *ctx_cookie)
{
return cxl_afu_reset(ctx_cookie);
}
static void cxlflash_set_master(void *ctx_cookie)
{
cxl_set_master(ctx_cookie);
}
static void *cxlflash_get_context(struct pci_dev *dev, void *afu_cookie)
{
return cxl_get_context(dev);
}
static void *cxlflash_dev_context_init(struct pci_dev *dev, void *afu_cookie)
{
return cxl_dev_context_init(dev);
}
static int cxlflash_release_context(void *ctx_cookie)
{
return cxl_release_context(ctx_cookie);
}
static void cxlflash_perst_reloads_same_image(void *afu_cookie, bool image)
{
cxl_perst_reloads_same_image(afu_cookie, image);
}
static ssize_t cxlflash_read_adapter_vpd(struct pci_dev *dev,
void *buf, size_t count)
{
return cxl_read_adapter_vpd(dev, buf, count);
}
static int cxlflash_allocate_afu_irqs(void *ctx_cookie, int num)
{
return cxl_allocate_afu_irqs(ctx_cookie, num);
}
static void cxlflash_free_afu_irqs(void *ctx_cookie)
{
cxl_free_afu_irqs(ctx_cookie);
}
static void *cxlflash_create_afu(struct pci_dev *dev)
{
return cxl_pci_to_afu(dev);
}
static void cxlflash_destroy_afu(void *afu)
{
/* Dummy fop for cxl */
}
static struct file *cxlflash_get_fd(void *ctx_cookie,
struct file_operations *fops, int *fd)
{
return cxl_get_fd(ctx_cookie, fops, fd);
}
static void *cxlflash_fops_get_context(struct file *file)
{
return cxl_fops_get_context(file);
}
static int cxlflash_start_work(void *ctx_cookie, u64 irqs)
{
struct cxl_ioctl_start_work work = { 0 };
work.num_interrupts = irqs;
work.flags = CXL_START_WORK_NUM_IRQS;
return cxl_start_work(ctx_cookie, &work);
}
static int cxlflash_fd_mmap(struct file *file, struct vm_area_struct *vm)
{
return cxl_fd_mmap(file, vm);
}
static int cxlflash_fd_release(struct inode *inode, struct file *file)
{
return cxl_fd_release(inode, file);
}
const struct cxlflash_backend_ops cxlflash_cxl_ops = {
.module = THIS_MODULE,
.psa_map = cxlflash_psa_map,
.psa_unmap = cxlflash_psa_unmap,
.process_element = cxlflash_process_element,
.map_afu_irq = cxlflash_map_afu_irq,
.unmap_afu_irq = cxlflash_unmap_afu_irq,
.get_irq_objhndl = cxlflash_get_irq_objhndl,
.start_context = cxlflash_start_context,
.stop_context = cxlflash_stop_context,
.afu_reset = cxlflash_afu_reset,
.set_master = cxlflash_set_master,
.get_context = cxlflash_get_context,
.dev_context_init = cxlflash_dev_context_init,
.release_context = cxlflash_release_context,
.perst_reloads_same_image = cxlflash_perst_reloads_same_image,
.read_adapter_vpd = cxlflash_read_adapter_vpd,
.allocate_afu_irqs = cxlflash_allocate_afu_irqs,
.free_afu_irqs = cxlflash_free_afu_irqs,
.create_afu = cxlflash_create_afu,
.destroy_afu = cxlflash_destroy_afu,
.get_fd = cxlflash_get_fd,
.fops_get_context = cxlflash_fops_get_context,
.start_work = cxlflash_start_work,
.fd_mmap = cxlflash_fd_mmap,
.fd_release = cxlflash_fd_release,
};
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