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1/*2 * SPDX-License-Identifier: MIT3 *4 * Copyright © 2019 Intel Corporation5 */6 7#include <drm/drm_file.h>8 9#include "i915_drv.h"10#include "igt_mmap.h"11 12unsigned long igt_mmap_offset(struct drm_i915_private *i915,13 u64 offset,14 unsigned long size,15 unsigned long prot,16 unsigned long flags)17{18 struct drm_vma_offset_node *node;19 struct file *file;20 unsigned long addr;21 int err;22 23 /* no need to refcount, we own this object */24 drm_vma_offset_lock_lookup(i915->drm.vma_offset_manager);25 node = drm_vma_offset_exact_lookup_locked(i915->drm.vma_offset_manager,26 offset / PAGE_SIZE, size / PAGE_SIZE);27 drm_vma_offset_unlock_lookup(i915->drm.vma_offset_manager);28 29 if (GEM_WARN_ON(!node)) {30 pr_info("Failed to lookup %llx\n", offset);31 return -ENOENT;32 }33 34 /* Pretend to open("/dev/dri/card0") */35 file = mock_drm_getfile(i915->drm.primary, O_RDWR);36 if (IS_ERR(file))37 return PTR_ERR(file);38 39 err = drm_vma_node_allow(node, file->private_data);40 if (err) {41 addr = err;42 goto out_file;43 }44 45 addr = vm_mmap(file, 0, drm_vma_node_size(node) << PAGE_SHIFT,46 prot, flags, drm_vma_node_offset_addr(node));47 48 drm_vma_node_revoke(node, file->private_data);49out_file:50 fput(file);51 return addr;52}53