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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/gpu/drm/udl/udl_gem.c
2 * Copyright (C) 2012 Red Hat
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License v2. See the file COPYING in the main directory of this archive for
11 #include <linux/shmem_fs.h>
12 #include <linux/dma-buf.h>
14 struct udl_gem_object
*udl_gem_alloc_object(struct drm_device
*dev
,
17 struct udl_gem_object
*obj
;
19 obj
= kzalloc(sizeof(*obj
), GFP_KERNEL
);
23 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
32 udl_gem_create(struct drm_file
*file
,
33 struct drm_device
*dev
,
37 struct udl_gem_object
*obj
;
41 size
= roundup(size
, PAGE_SIZE
);
43 obj
= udl_gem_alloc_object(dev
, size
);
47 ret
= drm_gem_handle_create(file
, &obj
->base
, &handle
);
49 drm_gem_object_release(&obj
->base
);
54 drm_gem_object_unreference(&obj
->base
);
59 int udl_dumb_create(struct drm_file
*file
,
60 struct drm_device
*dev
,
61 struct drm_mode_create_dumb
*args
)
63 args
->pitch
= args
->width
* ((args
->bpp
+ 1) / 8);
64 args
->size
= args
->pitch
* args
->height
;
65 return udl_gem_create(file
, dev
,
66 args
->size
, &args
->handle
);
69 int udl_drm_gem_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
73 ret
= drm_gem_mmap(filp
, vma
);
77 vma
->vm_flags
&= ~VM_PFNMAP
;
78 vma
->vm_flags
|= VM_MIXEDMAP
;
83 int udl_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
85 struct udl_gem_object
*obj
= to_udl_bo(vma
->vm_private_data
);
87 unsigned int page_offset
;
90 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
94 return VM_FAULT_SIGBUS
;
96 page
= obj
->pages
[page_offset
];
97 ret
= vm_insert_page(vma
, (unsigned long)vmf
->virtual_address
, page
);
102 return VM_FAULT_NOPAGE
;
106 return VM_FAULT_SIGBUS
;
110 static int udl_gem_get_pages(struct udl_gem_object
*obj
, gfp_t gfpmask
)
117 pages
= drm_gem_get_pages(&obj
->base
, gfpmask
);
119 return PTR_ERR(pages
);
126 static void udl_gem_put_pages(struct udl_gem_object
*obj
)
128 drm_gem_put_pages(&obj
->base
, obj
->pages
, false, false);
132 int udl_gem_vmap(struct udl_gem_object
*obj
)
134 int page_count
= obj
->base
.size
/ PAGE_SIZE
;
137 if (obj
->base
.import_attach
) {
138 obj
->vmapping
= dma_buf_vmap(obj
->base
.import_attach
->dmabuf
);
144 ret
= udl_gem_get_pages(obj
, GFP_KERNEL
);
148 obj
->vmapping
= vmap(obj
->pages
, page_count
, 0, PAGE_KERNEL
);
154 void udl_gem_vunmap(struct udl_gem_object
*obj
)
156 if (obj
->base
.import_attach
) {
157 dma_buf_vunmap(obj
->base
.import_attach
->dmabuf
, obj
->vmapping
);
162 vunmap(obj
->vmapping
);
164 udl_gem_put_pages(obj
);
167 void udl_gem_free_object(struct drm_gem_object
*gem_obj
)
169 struct udl_gem_object
*obj
= to_udl_bo(gem_obj
);
174 if (gem_obj
->import_attach
)
175 drm_prime_gem_destroy(gem_obj
, obj
->sg
);
178 udl_gem_put_pages(obj
);
180 drm_gem_free_mmap_offset(gem_obj
);
183 /* the dumb interface doesn't work with the GEM straight MMAP
184 interface, it expects to do MMAP on the drm fd, like normal */
185 int udl_gem_mmap(struct drm_file
*file
, struct drm_device
*dev
,
186 uint32_t handle
, uint64_t *offset
)
188 struct udl_gem_object
*gobj
;
189 struct drm_gem_object
*obj
;
192 mutex_lock(&dev
->struct_mutex
);
193 obj
= drm_gem_object_lookup(dev
, file
, handle
);
198 gobj
= to_udl_bo(obj
);
200 ret
= udl_gem_get_pages(gobj
, GFP_KERNEL
);
203 ret
= drm_gem_create_mmap_offset(obj
);
207 *offset
= drm_vma_node_offset_addr(&gobj
->base
.vma_node
);
210 drm_gem_object_unreference(&gobj
->base
);
212 mutex_unlock(&dev
->struct_mutex
);
216 static int udl_prime_create(struct drm_device
*dev
,
219 struct udl_gem_object
**obj_p
)
221 struct udl_gem_object
*obj
;
224 npages
= size
/ PAGE_SIZE
;
227 obj
= udl_gem_alloc_object(dev
, npages
* PAGE_SIZE
);
232 obj
->pages
= drm_malloc_ab(npages
, sizeof(struct page
*));
233 if (obj
->pages
== NULL
) {
234 DRM_ERROR("obj pages is NULL %d\n", npages
);
238 drm_prime_sg_to_page_addr_arrays(sg
, obj
->pages
, NULL
, npages
);
244 struct drm_gem_object
*udl_gem_prime_import(struct drm_device
*dev
,
245 struct dma_buf
*dma_buf
)
247 struct dma_buf_attachment
*attach
;
249 struct udl_gem_object
*uobj
;
253 attach
= dma_buf_attach(dma_buf
, dev
->dev
);
255 return ERR_CAST(attach
);
257 get_dma_buf(dma_buf
);
259 sg
= dma_buf_map_attachment(attach
, DMA_BIDIRECTIONAL
);
265 ret
= udl_prime_create(dev
, dma_buf
->size
, sg
, &uobj
);
270 uobj
->base
.import_attach
= attach
;
275 dma_buf_unmap_attachment(attach
, sg
, DMA_BIDIRECTIONAL
);
277 dma_buf_detach(dma_buf
, attach
);
278 dma_buf_put(dma_buf
);