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/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2019 Intel Corporation
*/
#include <drm/drm_file.h>
#include "i915_drv.h"
#include "igt_mmap.h"
unsigned long igt_mmap_offset(struct drm_i915_private *i915,
u64 offset,
unsigned long size,
unsigned long prot,
unsigned long flags)
{
struct drm_vma_offset_node *node;
struct file *file;
unsigned long addr;
int err;
/* no need to refcount, we own this object */
drm_vma_offset_lock_lookup(i915->drm.vma_offset_manager);
node = drm_vma_offset_exact_lookup_locked(i915->drm.vma_offset_manager,
offset / PAGE_SIZE, size / PAGE_SIZE);
drm_vma_offset_unlock_lookup(i915->drm.vma_offset_manager);
if (GEM_WARN_ON(!node)) {
pr_info("Failed to lookup %llx\n", offset);
return -ENOENT;
}
/* Pretend to open("/dev/dri/card0") */
file = mock_drm_getfile(i915->drm.primary, O_RDWR);
if (IS_ERR(file))
return PTR_ERR(file);
err = drm_vma_node_allow(node, file->private_data);
if (err) {
addr = err;
goto out_file;
}
addr = vm_mmap(file, 0, drm_vma_node_size(node) << PAGE_SHIFT,
prot, flags, drm_vma_node_offset_addr(node));
drm_vma_node_revoke(node, file->private_data);
out_file:
fput(file);
return addr;
}
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