2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
29 * @file intel_bufmgr_priv.h
31 * Private definitions of Intel-specific bufmgr functions and structures.
34 #ifndef INTEL_BUFMGR_PRIV_H
35 #define INTEL_BUFMGR_PRIV_H
38 * Context for a buffer manager instance.
40 * Contains public methods followed by private storage for the buffer manager.
42 struct _drm_intel_bufmgr {
44 * Allocate a buffer object.
46 * Buffer objects are not necessarily initially mapped into CPU virtual
47 * address space or graphics device aperture. They must be mapped
48 * using bo_map() or drm_intel_gem_bo_map_gtt() to be used by the CPU.
50 drm_intel_bo *(*bo_alloc) (drm_intel_bufmgr *bufmgr, const char *name,
51 unsigned long size, unsigned int alignment);
54 * Allocate a buffer object, hinting that it will be used as a
57 * This is otherwise the same as bo_alloc.
59 drm_intel_bo *(*bo_alloc_for_render) (drm_intel_bufmgr *bufmgr,
62 unsigned int alignment);
65 * Allocate a buffer object from an existing user accessible
66 * address malloc'd with the provided size.
67 * Alignment is used when mapping to the gtt.
68 * Flags may be I915_VMAP_READ_ONLY or I915_USERPTR_UNSYNCHRONIZED
70 drm_intel_bo *(*bo_alloc_userptr)(drm_intel_bufmgr *bufmgr,
71 const char *name, void *addr,
72 uint32_t tiling_mode, uint32_t stride,
77 * Allocate a tiled buffer object.
79 * Alignment for tiled objects is set automatically; the 'flags'
80 * argument provides a hint about how the object will be used initially.
82 * Valid tiling formats are:
87 * Note the tiling format may be rejected; callers should check the
88 * 'tiling_mode' field on return, as well as the pitch value, which
89 * may have been rounded up to accommodate for tiling restrictions.
91 drm_intel_bo *(*bo_alloc_tiled) (drm_intel_bufmgr *bufmgr,
93 int x, int y, int cpp,
94 uint32_t *tiling_mode,
98 /** Takes a reference on a buffer object */
99 void (*bo_reference) (drm_intel_bo *bo);
102 * Releases a reference on a buffer object, freeing the data if
103 * no references remain.
105 void (*bo_unreference) (drm_intel_bo *bo);
108 * Maps the buffer into userspace.
110 * This function will block waiting for any existing execution on the
111 * buffer to complete, first. The resulting mapping is available at
114 int (*bo_map) (drm_intel_bo *bo, int write_enable);
117 * Reduces the refcount on the userspace mapping of the buffer
120 int (*bo_unmap) (drm_intel_bo *bo);
123 * Write data into an object.
125 * This is an optional function, if missing,
126 * drm_intel_bo will map/memcpy/unmap.
128 int (*bo_subdata) (drm_intel_bo *bo, unsigned long offset,
129 unsigned long size, const void *data);
132 * Read data from an object
134 * This is an optional function, if missing,
135 * drm_intel_bo will map/memcpy/unmap.
137 int (*bo_get_subdata) (drm_intel_bo *bo, unsigned long offset,
138 unsigned long size, void *data);
141 * Waits for rendering to an object by the GPU to have completed.
143 * This is not required for any access to the BO by bo_map,
144 * bo_subdata, etc. It is merely a way for the driver to implement
147 void (*bo_wait_rendering) (drm_intel_bo *bo);
150 * Tears down the buffer manager instance.
152 void (*destroy) (drm_intel_bufmgr *bufmgr);
155 * Indicate if the buffer can be placed anywhere in the full ppgtt
156 * address range (2^48).
158 * Any resource used with flat/heapless (0x00000000-0xfffff000)
159 * General State Heap (GSH) or Intructions State Heap (ISH) must
160 * be in a 32-bit range. 48-bit range will only be used when explicitly
163 * \param bo Buffer to set the use_48b_address_range flag.
164 * \param enable The flag value.
166 void (*bo_use_48b_address_range) (drm_intel_bo *bo, uint32_t enable);
169 * Add relocation entry in reloc_buf, which will be updated with the
170 * target buffer's real offset on on command submission.
172 * Relocations remain in place for the lifetime of the buffer object.
174 * \param bo Buffer to write the relocation into.
175 * \param offset Byte offset within reloc_bo of the pointer to
177 * \param target_bo Buffer whose offset should be written into the
179 * \param target_offset Constant value to be added to target_bo's
180 * offset in relocation entry.
181 * \param read_domains GEM read domains which the buffer will be
182 * read into by the command that this relocation
184 * \param write_domains GEM read domains which the buffer will be
185 * dirtied in by the command that this
186 * relocation is part of.
188 int (*bo_emit_reloc) (drm_intel_bo *bo, uint32_t offset,
189 drm_intel_bo *target_bo, uint32_t target_offset,
190 uint32_t read_domains, uint32_t write_domain);
191 int (*bo_emit_reloc_fence)(drm_intel_bo *bo, uint32_t offset,
192 drm_intel_bo *target_bo,
193 uint32_t target_offset,
194 uint32_t read_domains,
195 uint32_t write_domain);
197 /** Executes the command buffer pointed to by bo. */
198 int (*bo_exec) (drm_intel_bo *bo, int used,
199 drm_clip_rect_t *cliprects, int num_cliprects,
202 /** Executes the command buffer pointed to by bo on the selected
205 int (*bo_mrb_exec) (drm_intel_bo *bo, int used,
206 drm_clip_rect_t *cliprects, int num_cliprects,
207 int DR4, unsigned flags);
210 * Pin a buffer to the aperture and fix the offset until unpinned
212 * \param buf Buffer to pin
213 * \param alignment Required alignment for aperture, in bytes
215 int (*bo_pin) (drm_intel_bo *bo, uint32_t alignment);
218 * Unpin a buffer from the aperture, allowing it to be removed
220 * \param buf Buffer to unpin
222 int (*bo_unpin) (drm_intel_bo *bo);
225 * Ask that the buffer be placed in tiling mode
227 * \param buf Buffer to set tiling mode for
228 * \param tiling_mode desired, and returned tiling mode
230 int (*bo_set_tiling) (drm_intel_bo *bo, uint32_t * tiling_mode,
234 * Get the current tiling (and resulting swizzling) mode for the bo.
236 * \param buf Buffer to get tiling mode for
237 * \param tiling_mode returned tiling mode
238 * \param swizzle_mode returned swizzling mode
240 int (*bo_get_tiling) (drm_intel_bo *bo, uint32_t * tiling_mode,
241 uint32_t * swizzle_mode);
244 * Set the offset at which this buffer will be softpinned
245 * \param bo Buffer to set the softpin offset for
246 * \param offset Softpin offset
248 int (*bo_set_softpin_offset) (drm_intel_bo *bo, uint64_t offset);
251 * Create a visible name for a buffer which can be used by other apps
253 * \param buf Buffer to create a name for
254 * \param name Returned name
256 int (*bo_flink) (drm_intel_bo *bo, uint32_t * name);
259 * Returns 1 if mapping the buffer for write could cause the process
260 * to block, due to the object being active in the GPU.
262 int (*bo_busy) (drm_intel_bo *bo);
265 * Specify the volatility of the buffer.
266 * \param bo Buffer to create a name for
267 * \param madv The purgeable status
269 * Use I915_MADV_DONTNEED to mark the buffer as purgeable, and it will be
270 * reclaimed under memory pressure. If you subsequently require the buffer,
271 * then you must pass I915_MADV_WILLNEED to mark the buffer as required.
273 * Returns 1 if the buffer was retained, or 0 if it was discarded whilst
274 * marked as I915_MADV_DONTNEED.
276 int (*bo_madvise) (drm_intel_bo *bo, int madv);
278 int (*check_aperture_space) (drm_intel_bo ** bo_array, int count);
281 * Disable buffer reuse for buffers which will be shared in some way,
282 * as with scanout buffers. When the buffer reference count goes to
283 * zero, it will be freed and not placed in the reuse list.
285 * \param bo Buffer to disable reuse for
287 int (*bo_disable_reuse) (drm_intel_bo *bo);
290 * Query whether a buffer is reusable.
292 * \param bo Buffer to query
294 int (*bo_is_reusable) (drm_intel_bo *bo);
298 * Return the pipe associated with a crtc_id so that vblank
299 * synchronization can use the correct data in the request.
300 * This is only supported for KMS and gem at this point, when
301 * unsupported, this function returns -1 and leaves the decision
302 * of what to do in that case to the caller
304 * \param bufmgr the associated buffer manager
305 * \param crtc_id the crtc identifier
307 int (*get_pipe_from_crtc_id) (drm_intel_bufmgr *bufmgr, int crtc_id);
309 /** Returns true if target_bo is in the relocation tree rooted at bo. */
310 int (*bo_references) (drm_intel_bo *bo, drm_intel_bo *target_bo);
312 /**< Enables verbose debugging printouts */
316 struct _drm_intel_context {
318 struct _drm_intel_bufmgr *bufmgr;
321 #define ALIGN(value, alignment) ((value + alignment - 1) & ~(alignment - 1))
322 #define ROUND_UP_TO(x, y) (((x) + (y) - 1) / (y) * (y))
323 #define ROUND_UP_TO_MB(x) ROUND_UP_TO((x), 1024*1024)
325 #endif /* INTEL_BUFMGR_PRIV_H */