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24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/shmem_fs.h>
27
28#include <drm/drmP.h>
29
30
31
32
33
34
35struct page **_drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask)
36{
37 struct inode *inode;
38 struct address_space *mapping;
39 struct page *p, **pages;
40 int i, npages;
41
42
43 inode = file_inode(obj->filp);
44 mapping = inode->i_mapping;
45
46 npages = obj->size >> PAGE_SHIFT;
47
48 pages = drm_malloc_ab(npages, sizeof(struct page *));
49 if (pages == NULL)
50 return ERR_PTR(-ENOMEM);
51
52 gfpmask |= mapping_gfp_mask(mapping);
53
54 for (i = 0; i < npages; i++) {
55 p = shmem_read_mapping_page_gfp(mapping, i, gfpmask);
56 if (IS_ERR(p))
57 goto fail;
58 pages[i] = p;
59
60
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74
75
76 BUG_ON((gfpmask & __GFP_DMA32) &&
77 (page_to_pfn(p) >= 0x00100000UL));
78 }
79
80 return pages;
81
82fail:
83 while (i--)
84 page_cache_release(pages[i]);
85
86 drm_free_large(pages);
87 return ERR_CAST(p);
88}
89
90
91
92
93
94
95void _drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
96 bool dirty, bool accessed)
97{
98 int i, npages;
99
100 npages = obj->size >> PAGE_SHIFT;
101
102 for (i = 0; i < npages; i++) {
103 if (dirty)
104 set_page_dirty(pages[i]);
105
106 if (accessed)
107 mark_page_accessed(pages[i]);
108
109
110 page_cache_release(pages[i]);
111 }
112
113 drm_free_large(pages);
114}
115
116int
117_drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size)
118{
119 struct drm_device *dev = obj->dev;
120 struct drm_gem_mm *mm = dev->mm_private;
121 struct drm_map_list *list;
122 struct drm_local_map *map;
123 int ret = 0;
124
125
126 list = &obj->map_list;
127 list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL);
128 if (!list->map)
129 return -ENOMEM;
130
131 map = list->map;
132 map->type = _DRM_GEM;
133 map->size = size;
134 map->handle = obj;
135
136
137 list->file_offset_node = drm_mm_search_free(&mm->offset_manager,
138 size / PAGE_SIZE, 0, 0);
139
140 if (!list->file_offset_node) {
141 DRM_ERROR("failed to allocate offset for bo %d\n", obj->name);
142 ret = -ENOSPC;
143 goto out_free_list;
144 }
145
146 list->file_offset_node = drm_mm_get_block(list->file_offset_node,
147 size / PAGE_SIZE, 0);
148 if (!list->file_offset_node) {
149 ret = -ENOMEM;
150 goto out_free_list;
151 }
152
153 list->hash.key = list->file_offset_node->start;
154 ret = drm_ht_insert_item(&mm->offset_hash, &list->hash);
155 if (ret) {
156 DRM_ERROR("failed to add to map hash\n");
157 goto out_free_mm;
158 }
159
160 return 0;
161
162out_free_mm:
163 drm_mm_put_block(list->file_offset_node);
164out_free_list:
165 kfree(list->map);
166 list->map = NULL;
167
168 return ret;
169}
170