/* * Copyright © 2008-2012 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Eric Anholt * */ /** * @file brw_bufmgr.h * * Public definitions of Intel-specific bufmgr functions. */ #ifndef INTEL_BUFMGR_H #define INTEL_BUFMGR_H #include #include #include #include "util/list.h" #if defined(__cplusplus) extern "C" { #endif struct gen_device_info; struct brw_context; struct brw_bo { /** * Size in bytes of the buffer object. * * The size may be larger than the size originally requested for the * allocation, such as being aligned to page size. */ uint64_t size; /** * Alignment requirement for object * * Used for GTT mapping & pinning the object. */ uint64_t align; /** * Virtual address for accessing the buffer data. Only valid while * mapped. */ #ifdef __cplusplus void *virt; #else void *virtual; #endif /** Buffer manager context associated with this buffer object */ struct brw_bufmgr *bufmgr; /** The GEM handle for this buffer object. */ uint32_t gem_handle; /** * Last seen card virtual address (offset from the beginning of the * aperture) for the object. This should be used to fill relocation * entries when calling brw_bo_emit_reloc() */ uint64_t offset64; /** * Boolean of whether the GPU is definitely not accessing the buffer. * * This is only valid when reusable, since non-reusable * buffers are those that have been shared with other * processes, so we don't know their state. */ bool idle; int refcount; const char *name; /** * Kenel-assigned global name for this object * * List contains both flink named and prime fd'd objects */ unsigned int global_name; /** * Current tiling mode */ uint32_t tiling_mode; uint32_t swizzle_mode; uint32_t stride; time_t free_time; /** Mapped address for the buffer, saved across map/unmap cycles */ void *mem_virtual; /** GTT virtual address for the buffer, saved across map/unmap cycles */ void *gtt_virtual; /** WC CPU address for the buffer, saved across map/unmap cycles */ void *wc_virtual; int map_count; /** BO cache list */ struct list_head head; /** * Boolean of whether this buffer can be re-used */ bool reusable; }; #define BO_ALLOC_FOR_RENDER (1<<0) /** * Allocate a buffer object. * * Buffer objects are not necessarily initially mapped into CPU virtual * address space or graphics device aperture. They must be mapped * using bo_map() or brw_bo_map_gtt() to be used by the CPU. */ struct brw_bo *brw_bo_alloc(struct brw_bufmgr *bufmgr, const char *name, uint64_t size, uint64_t alignment); /** * Allocate a tiled buffer object. * * Alignment for tiled objects is set automatically; the 'flags' * argument provides a hint about how the object will be used initially. * * Valid tiling formats are: * I915_TILING_NONE * I915_TILING_X * I915_TILING_Y * * Note the tiling format may be rejected; callers should check the * 'tiling_mode' field on return, as well as the pitch value, which * may have been rounded up to accommodate for tiling restrictions. */ struct brw_bo *brw_bo_alloc_tiled(struct brw_bufmgr *bufmgr, const char *name, int x, int y, int cpp, uint32_t tiling_mode, uint32_t *pitch, unsigned flags); /** Takes a reference on a buffer object */ void brw_bo_reference(struct brw_bo *bo); /** * Releases a reference on a buffer object, freeing the data if * no references remain. */ void brw_bo_unreference(struct brw_bo *bo); /** * Maps the buffer into userspace. * * This function will block waiting for any existing execution on the * buffer to complete, first. The resulting mapping is available at * buf->virtual. */ int brw_bo_map(struct brw_context *brw, struct brw_bo *bo, int write_enable); /** * Reduces the refcount on the userspace mapping of the buffer * object. */ int brw_bo_unmap(struct brw_bo *bo); /** Write data into an object. */ int brw_bo_subdata(struct brw_bo *bo, uint64_t offset, uint64_t size, const void *data); /** Read data from an object. */ int brw_bo_get_subdata(struct brw_bo *bo, uint64_t offset, uint64_t size, void *data); /** * Waits for rendering to an object by the GPU to have completed. * * This is not required for any access to the BO by bo_map, * bo_subdata, etc. It is merely a way for the driver to implement * glFinish. */ void brw_bo_wait_rendering(struct brw_context *brw, struct brw_bo *bo); /** * Tears down the buffer manager instance. */ void brw_bufmgr_destroy(struct brw_bufmgr *bufmgr); /** * Get the current tiling (and resulting swizzling) mode for the bo. * * \param buf Buffer to get tiling mode for * \param tiling_mode returned tiling mode * \param swizzle_mode returned swizzling mode */ int brw_bo_get_tiling(struct brw_bo *bo, uint32_t *tiling_mode, uint32_t *swizzle_mode); /** * Create a visible name for a buffer which can be used by other apps * * \param buf Buffer to create a name for * \param name Returned name */ int brw_bo_flink(struct brw_bo *bo, uint32_t *name); /** * Returns 1 if mapping the buffer for write could cause the process * to block, due to the object being active in the GPU. */ int brw_bo_busy(struct brw_bo *bo); /** * Specify the volatility of the buffer. * \param bo Buffer to create a name for * \param madv The purgeable status * * Use I915_MADV_DONTNEED to mark the buffer as purgeable, and it will be * reclaimed under memory pressure. If you subsequently require the buffer, * then you must pass I915_MADV_WILLNEED to mark the buffer as required. * * Returns 1 if the buffer was retained, or 0 if it was discarded whilst * marked as I915_MADV_DONTNEED. */ int brw_bo_madvise(struct brw_bo *bo, int madv); /* drm_bacon_bufmgr_gem.c */ struct brw_bufmgr *brw_bufmgr_init(struct gen_device_info *devinfo, int fd, int batch_size); struct brw_bo *brw_bo_gem_create_from_name(struct brw_bufmgr *bufmgr, const char *name, unsigned int handle); void brw_bufmgr_enable_reuse(struct brw_bufmgr *bufmgr); int brw_bo_map_unsynchronized(struct brw_context *brw, struct brw_bo *bo); int brw_bo_map_gtt(struct brw_context *brw, struct brw_bo *bo); void *brw_bo_map__cpu(struct brw_bo *bo); void *brw_bo_map__gtt(struct brw_bo *bo); void *brw_bo_map__wc(struct brw_bo *bo); int brw_bo_wait(struct brw_bo *bo, int64_t timeout_ns); uint32_t brw_create_hw_context(struct brw_bufmgr *bufmgr); void brw_destroy_hw_context(struct brw_bufmgr *bufmgr, uint32_t ctx_id); int brw_bo_gem_export_to_prime(struct brw_bo *bo, int *prime_fd); struct brw_bo *brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr, int prime_fd, int size); int brw_reg_read(struct brw_bufmgr *bufmgr, uint32_t offset, uint64_t *result); /** @{ */ #if defined(__cplusplus) } #endif #endif /* INTEL_BUFMGR_H */