1 /* 1 /*
2 * Copyright (c) 2016 Intel Corporation 2 * Copyright (c) 2016 Intel Corporation
3 * 3 *
4 * Permission to use, copy, modify, distribute 4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby gra 5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all co 6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in 7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not 8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the 9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright ho 10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for 11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty. 12 * is" without express or implied warranty.
13 * 13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTI 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHAN 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSO 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CO 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNE 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE. 20 * OF THIS SOFTWARE.
21 */ 21 */
22 22
23 #ifndef __DRM_FRAMEBUFFER_H__ 23 #ifndef __DRM_FRAMEBUFFER_H__
24 #define __DRM_FRAMEBUFFER_H__ 24 #define __DRM_FRAMEBUFFER_H__
25 25
26 #include <linux/ctype.h> <<
27 #include <linux/list.h> 26 #include <linux/list.h>
28 #include <linux/sched.h> !! 27 #include <linux/ctype.h>
29 <<
30 #include <drm/drm_fourcc.h> <<
31 #include <drm/drm_mode_object.h> 28 #include <drm/drm_mode_object.h>
32 29
33 struct drm_clip_rect; <<
34 struct drm_device; <<
35 struct drm_file; <<
36 struct drm_framebuffer; 30 struct drm_framebuffer;
37 struct drm_gem_object; !! 31 struct drm_file;
>> 32 struct drm_device;
38 33
39 /** 34 /**
40 * struct drm_framebuffer_funcs - framebuffer 35 * struct drm_framebuffer_funcs - framebuffer hooks
41 */ 36 */
42 struct drm_framebuffer_funcs { 37 struct drm_framebuffer_funcs {
43 /** 38 /**
44 * @destroy: 39 * @destroy:
45 * 40 *
46 * Clean up framebuffer resources, spe 41 * Clean up framebuffer resources, specifically also unreference the
47 * backing storage. The core guarantee 42 * backing storage. The core guarantees to call this function for every
48 * framebuffer successfully created by !! 43 * framebuffer successfully created by ->fb_create() in
49 * &drm_mode_config_funcs.fb_create. D !! 44 * &drm_mode_config_funcs. Drivers must also call
50 * drm_framebuffer_cleanup() to releas 45 * drm_framebuffer_cleanup() to release DRM core resources for this
51 * framebuffer. 46 * framebuffer.
52 */ 47 */
53 void (*destroy)(struct drm_framebuffer 48 void (*destroy)(struct drm_framebuffer *framebuffer);
54 49
55 /** 50 /**
56 * @create_handle: 51 * @create_handle:
57 * 52 *
58 * Create a buffer handle in the drive 53 * Create a buffer handle in the driver-specific buffer manager (either
59 * GEM or TTM) valid for the passed-in !! 54 * GEM or TTM) valid for the passed-in struct &drm_file. This is used by
60 * the core to implement the GETFB IOC 55 * the core to implement the GETFB IOCTL, which returns (for
61 * sufficiently priviledged user) also 56 * sufficiently priviledged user) also a native buffer handle. This can
62 * be used for seamless transitions be 57 * be used for seamless transitions between modesetting clients by
63 * copying the current screen contents 58 * copying the current screen contents to a private buffer and blending
64 * between that and the new contents. 59 * between that and the new contents.
65 * 60 *
66 * GEM based drivers should call drm_g 61 * GEM based drivers should call drm_gem_handle_create() to create the
67 * handle. 62 * handle.
68 * 63 *
69 * RETURNS: 64 * RETURNS:
70 * 65 *
71 * 0 on success or a negative error co 66 * 0 on success or a negative error code on failure.
72 */ 67 */
73 int (*create_handle)(struct drm_frameb 68 int (*create_handle)(struct drm_framebuffer *fb,
74 struct drm_file * 69 struct drm_file *file_priv,
75 unsigned int *han 70 unsigned int *handle);
76 /** 71 /**
77 * @dirty: 72 * @dirty:
78 * 73 *
79 * Optional callback for the dirty fb 74 * Optional callback for the dirty fb IOCTL.
80 * 75 *
81 * Userspace can notify the driver via 76 * Userspace can notify the driver via this callback that an area of the
82 * framebuffer has changed and should 77 * framebuffer has changed and should be flushed to the display
83 * hardware. This can also be used int 78 * hardware. This can also be used internally, e.g. by the fbdev
84 * emulation, though that's not the ca 79 * emulation, though that's not the case currently.
85 * 80 *
86 * See documentation in drm_mode.h for 81 * See documentation in drm_mode.h for the struct drm_mode_fb_dirty_cmd
87 * for more information as all the sem 82 * for more information as all the semantics and arguments have a one to
88 * one mapping on this function. 83 * one mapping on this function.
89 * 84 *
90 * Atomic drivers should use drm_atomi <<
91 * this hook. <<
92 * <<
93 * RETURNS: 85 * RETURNS:
94 * 86 *
95 * 0 on success or a negative error co 87 * 0 on success or a negative error code on failure.
96 */ 88 */
97 int (*dirty)(struct drm_framebuffer *f 89 int (*dirty)(struct drm_framebuffer *framebuffer,
98 struct drm_file *file_pri 90 struct drm_file *file_priv, unsigned flags,
99 unsigned color, struct dr 91 unsigned color, struct drm_clip_rect *clips,
100 unsigned num_clips); 92 unsigned num_clips);
101 }; 93 };
102 94
103 /** 95 /**
104 * struct drm_framebuffer - frame buffer objec 96 * struct drm_framebuffer - frame buffer object
105 * 97 *
106 * Note that the fb is refcounted for the bene 98 * Note that the fb is refcounted for the benefit of driver internals,
107 * for example some hw, disabling a CRTC/plane 99 * for example some hw, disabling a CRTC/plane is asynchronous, and
108 * scanout does not actually complete until th 100 * scanout does not actually complete until the next vblank. So some
109 * cleanup (like releasing the reference(s) on 101 * cleanup (like releasing the reference(s) on the backing GEM bo(s))
110 * should be deferred. In cases like this, th 102 * should be deferred. In cases like this, the driver would like to
111 * hold a ref to the fb even though it has alr 103 * hold a ref to the fb even though it has already been removed from
112 * userspace perspective. See drm_framebuffer_ !! 104 * userspace perspective. See drm_framebuffer_reference() and
113 * drm_framebuffer_put(). !! 105 * drm_framebuffer_unreference().
114 * 106 *
115 * The refcount is stored inside the mode obje 107 * The refcount is stored inside the mode object @base.
116 */ 108 */
117 struct drm_framebuffer { 109 struct drm_framebuffer {
118 /** 110 /**
119 * @dev: DRM device this framebuffer b 111 * @dev: DRM device this framebuffer belongs to
120 */ 112 */
121 struct drm_device *dev; 113 struct drm_device *dev;
122 /** 114 /**
123 * @head: Place on the &drm_mode_confi !! 115 * @head: Place on the dev->mode_config.fb_list, access protected by
124 * &drm_mode_config.fb_lock. !! 116 * dev->mode_config.fb_lock.
125 */ 117 */
126 struct list_head head; 118 struct list_head head;
127 119
128 /** 120 /**
129 * @base: base modeset object structur 121 * @base: base modeset object structure, contains the reference count.
130 */ 122 */
131 struct drm_mode_object base; 123 struct drm_mode_object base;
132 <<
133 /** <<
134 * @comm: Name of the process allocati <<
135 */ <<
136 char comm[TASK_COMM_LEN]; <<
137 <<
138 /** <<
139 * @format: framebuffer format informa <<
140 */ <<
141 const struct drm_format_info *format; <<
142 /** 124 /**
143 * @funcs: framebuffer vfunc table 125 * @funcs: framebuffer vfunc table
144 */ 126 */
145 const struct drm_framebuffer_funcs *fu 127 const struct drm_framebuffer_funcs *funcs;
146 /** 128 /**
147 * @pitches: Line stride per buffer. F 129 * @pitches: Line stride per buffer. For userspace created object this
148 * is copied from drm_mode_fb_cmd2. 130 * is copied from drm_mode_fb_cmd2.
149 */ 131 */
150 unsigned int pitches[DRM_FORMAT_MAX_PL !! 132 unsigned int pitches[4];
151 /** 133 /**
152 * @offsets: Offset from buffer start 134 * @offsets: Offset from buffer start to the actual pixel data in bytes,
153 * per buffer. For userspace created o 135 * per buffer. For userspace created object this is copied from
154 * drm_mode_fb_cmd2. 136 * drm_mode_fb_cmd2.
155 * 137 *
156 * Note that this is a linear offset a 138 * Note that this is a linear offset and does not take into account
157 * tiling or buffer layout per @modifi !! 139 * tiling or buffer laytou per @modifier. It meant to be used when the
158 * the actual pixel data for this fram !! 140 * actual pixel data for this framebuffer plane starts at an offset,
159 * e.g. when multiple planes are alloc !! 141 * e.g. when multiple planes are allocated within the same backing
160 * storage buffer object. For tiled la !! 142 * storage buffer object. For tiled layouts this generally means it
161 * @offsets must at least be tile-size 143 * @offsets must at least be tile-size aligned, but hardware often has
162 * stricter requirements. 144 * stricter requirements.
163 * 145 *
164 * This should not be used to specifiy 146 * This should not be used to specifiy x/y pixel offsets into the buffer
165 * data (even for linear buffers). Spe 147 * data (even for linear buffers). Specifying an x/y pixel offset is
166 * instead done through the source rec !! 148 * instead done through the source rectangle in struct &drm_plane_state.
167 */ 149 */
168 unsigned int offsets[DRM_FORMAT_MAX_PL !! 150 unsigned int offsets[4];
169 /** 151 /**
170 * @modifier: Data layout modifier. Th !! 152 * @modifier: Data layout modifier, per buffer. This is used to describe
171 * tiling, or also special layouts (li 153 * tiling, or also special layouts (like compression) of auxiliary
172 * buffers. For userspace created obje 154 * buffers. For userspace created object this is copied from
173 * drm_mode_fb_cmd2. 155 * drm_mode_fb_cmd2.
174 */ 156 */
175 uint64_t modifier; !! 157 uint64_t modifier[4];
176 /** 158 /**
177 * @width: Logical width of the visibl 159 * @width: Logical width of the visible area of the framebuffer, in
178 * pixels. 160 * pixels.
179 */ 161 */
180 unsigned int width; 162 unsigned int width;
181 /** 163 /**
182 * @height: Logical height of the visi 164 * @height: Logical height of the visible area of the framebuffer, in
183 * pixels. 165 * pixels.
184 */ 166 */
185 unsigned int height; 167 unsigned int height;
186 /** 168 /**
>> 169 * @depth: Depth in bits per pixel for RGB formats. 0 for everything
>> 170 * else. Legacy information derived from @pixel_format, it's suggested to use
>> 171 * the DRM FOURCC codes and helper functions directly instead.
>> 172 */
>> 173 unsigned int depth;
>> 174 /**
>> 175 * @bits_per_pixel: Storage used bits per pixel for RGB formats. 0 for
>> 176 * everything else. Legacy information derived from @pixel_format, it's
>> 177 * suggested to use the DRM FOURCC codes and helper functions directly
>> 178 * instead.
>> 179 */
>> 180 int bits_per_pixel;
>> 181 /**
187 * @flags: Framebuffer flags like DRM_ 182 * @flags: Framebuffer flags like DRM_MODE_FB_INTERLACED or
188 * DRM_MODE_FB_MODIFIERS. 183 * DRM_MODE_FB_MODIFIERS.
189 */ 184 */
190 int flags; 185 int flags;
191 /** 186 /**
192 * @filp_head: Placed on &drm_file.fbs !! 187 * @pixel_format: DRM FOURCC code describing the pixel format.
193 */ 188 */
194 struct list_head filp_head; !! 189 uint32_t pixel_format; /* fourcc format */
195 /** 190 /**
196 * @obj: GEM objects backing the frame !! 191 * @hot_x: X coordinate of the cursor hotspot. Used by the legacy cursor
197 * !! 192 * IOCTL when the driver supports cursor through a DRM_PLANE_TYPE_CURSOR
198 * This is used by the GEM framebuffer !! 193 * universal plane.
199 * drm_gem_fb_create(). !! 194 */
>> 195 int hot_x;
>> 196 /**
>> 197 * @hot_y: Y coordinate of the cursor hotspot. Used by the legacy cursor
>> 198 * IOCTL when the driver supports cursor through a DRM_PLANE_TYPE_CURSOR
>> 199 * universal plane.
>> 200 */
>> 201 int hot_y;
>> 202 /**
>> 203 * @filp_head: Placed on struct &drm_file fbs list_head, protected by
>> 204 * fbs_lock in the same structure.
200 */ 205 */
201 struct drm_gem_object *obj[DRM_FORMAT_ !! 206 struct list_head filp_head;
202 }; 207 };
203 208
204 #define obj_to_fb(x) container_of(x, struct dr 209 #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)
205 210
206 int drm_framebuffer_init(struct drm_device *de 211 int drm_framebuffer_init(struct drm_device *dev,
207 struct drm_framebuffe 212 struct drm_framebuffer *fb,
208 const struct drm_fram 213 const struct drm_framebuffer_funcs *funcs);
209 struct drm_framebuffer *drm_framebuffer_lookup 214 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
210 <<
211 215 uint32_t id);
212 void drm_framebuffer_remove(struct drm_framebu 216 void drm_framebuffer_remove(struct drm_framebuffer *fb);
213 void drm_framebuffer_cleanup(struct drm_frameb 217 void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
214 void drm_framebuffer_unregister_private(struct 218 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);
215 219
216 /** 220 /**
217 * drm_framebuffer_get - acquire a framebuffer !! 221 * drm_framebuffer_reference - incr the fb refcnt
218 * @fb: DRM framebuffer !! 222 * @fb: framebuffer
219 * 223 *
220 * This function increments the framebuffer's !! 224 * This functions increments the fb's refcount.
221 */ 225 */
222 static inline void drm_framebuffer_get(struct !! 226 static inline void drm_framebuffer_reference(struct drm_framebuffer *fb)
223 { 227 {
224 drm_mode_object_get(&fb->base); !! 228 drm_mode_object_reference(&fb->base);
225 } 229 }
226 230
227 /** 231 /**
228 * drm_framebuffer_put - release a framebuffer !! 232 * drm_framebuffer_unreference - unref a framebuffer
229 * @fb: DRM framebuffer !! 233 * @fb: framebuffer to unref
230 * 234 *
231 * This function decrements the framebuffer's !! 235 * This functions decrements the fb's refcount and frees it if it drops to zero.
232 * framebuffer if the reference count drops to <<
233 */ 236 */
234 static inline void drm_framebuffer_put(struct !! 237 static inline void drm_framebuffer_unreference(struct drm_framebuffer *fb)
235 { 238 {
236 drm_mode_object_put(&fb->base); !! 239 drm_mode_object_unreference(&fb->base);
237 } 240 }
238 241
239 /** 242 /**
240 * drm_framebuffer_read_refcount - read the fr 243 * drm_framebuffer_read_refcount - read the framebuffer reference count.
241 * @fb: framebuffer 244 * @fb: framebuffer
242 * 245 *
243 * This functions returns the framebuffer's re 246 * This functions returns the framebuffer's reference count.
244 */ 247 */
245 static inline uint32_t drm_framebuffer_read_re !! 248 static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
246 { 249 {
247 return kref_read(&fb->base.refcount); !! 250 return atomic_read(&fb->base.refcount.refcount);
248 } 251 }
249 252
250 /** 253 /**
251 * drm_framebuffer_assign - store a reference <<
252 * @p: location to store framebuffer <<
253 * @fb: new framebuffer (maybe NULL) <<
254 * <<
255 * This functions sets the location to store a <<
256 * unreferencing the framebuffer that was prev <<
257 */ <<
258 static inline void drm_framebuffer_assign(stru <<
259 stru <<
260 { <<
261 if (fb) <<
262 drm_framebuffer_get(fb); <<
263 if (*p) <<
264 drm_framebuffer_put(*p); <<
265 *p = fb; <<
266 } <<
267 <<
268 /* <<
269 * drm_for_each_fb - iterate over all framebuf 254 * drm_for_each_fb - iterate over all framebuffers
270 * @fb: the loop cursor 255 * @fb: the loop cursor
271 * @dev: the DRM device 256 * @dev: the DRM device
272 * 257 *
273 * Iterate over all framebuffers of @dev. User !! 258 * Iterate over all framebuffers of @dev. User must hold the fb_lock from
274 * &drm_mode_config.fb_lock. !! 259 * &drm_mode_config.
275 */ 260 */
276 #define drm_for_each_fb(fb, dev) \ 261 #define drm_for_each_fb(fb, dev) \
277 for (WARN_ON(!mutex_is_locked(&(dev)-> 262 for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.fb_lock)), \
278 fb = list_first_entry(&(dev)->mod 263 fb = list_first_entry(&(dev)->mode_config.fb_list, \
279 stru 264 struct drm_framebuffer, head); \
280 &fb->head != (&(dev)->mode_config 265 &fb->head != (&(dev)->mode_config.fb_list); \
281 fb = list_next_entry(fb, head)) 266 fb = list_next_entry(fb, head))
282 <<
283 /** <<
284 * struct drm_afbc_framebuffer - a special afb <<
285 * <<
286 * A derived class of struct drm_framebuffer, <<
287 */ <<
288 struct drm_afbc_framebuffer { <<
289 /** <<
290 * @base: base framebuffer structure. <<
291 */ <<
292 struct drm_framebuffer base; <<
293 /** <<
294 * @block_width: width of a single afb <<
295 */ <<
296 u32 block_width; <<
297 /** <<
298 * @block_height: height of a single a <<
299 */ <<
300 u32 block_height; <<
301 /** <<
302 * @aligned_width: aligned frame buffe <<
303 */ <<
304 u32 aligned_width; <<
305 /** <<
306 * @aligned_height: aligned frame buff <<
307 */ <<
308 u32 aligned_height; <<
309 /** <<
310 * @offset: offset of the first afbc h <<
311 */ <<
312 u32 offset; <<
313 /** <<
314 * @afbc_size: minimum size of afbc bu <<
315 */ <<
316 u32 afbc_size; <<
317 }; <<
318 <<
319 #define fb_to_afbc_fb(x) container_of(x, struc <<
320 <<
321 #endif 267 #endif
322 268
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