1 /* 2 * SPDX-License-Identifier: MIT 3 * 4 * Copyright © 2019 Intel Corporation 5 */ 6 7 #include <drm/drm_file.h> 8 9 #include "i915_drv.h" 10 #include "igt_mmap.h" 11 12 unsigned long igt_mmap_offset_with_file(struct drm_i915_private *i915, 13 u64 offset, 14 unsigned long size, 15 unsigned long prot, 16 unsigned long flags, 17 struct file *file) 18 { 19 struct drm_vma_offset_node *node; 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 err = drm_vma_node_allow(node, file->private_data); 35 if (err) { 36 return err; 37 } 38 39 addr = vm_mmap(file, 0, drm_vma_node_size(node) << PAGE_SHIFT, 40 prot, flags, drm_vma_node_offset_addr(node)); 41 42 drm_vma_node_revoke(node, file->private_data); 43 44 return addr; 45 } 46 47 unsigned long igt_mmap_offset(struct drm_i915_private *i915, 48 u64 offset, 49 unsigned long size, 50 unsigned long prot, 51 unsigned long flags) 52 { 53 struct file *file; 54 unsigned long addr; 55 56 /* Pretend to open("/dev/dri/card0") */ 57 file = mock_drm_getfile(i915->drm.primary, O_RDWR); 58 if (IS_ERR(file)) 59 return PTR_ERR(file); 60 61 addr = igt_mmap_offset_with_file(i915, offset, size, prot, flags, file); 62 fput(file); 63 64 return addr; 65 } 66