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drm_gem_cma_helper.h revision 1.3 
      1 /*	$NetBSD: drm_gem_cma_helper.h,v 1.3 2022/07/02 00:26:07 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2022 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef	_DRM_DRM_GEM_CMA_HELPER_H_
     30 #define	_DRM_DRM_GEM_CMA_HELPER_H_
     31 
     32 #include <sys/types.h>
     33 
     34 #include <sys/bus.h>
     35 #include <sys/vmem.h>
     36 
     37 #include <uvm/uvm_pager.h>
     38 
     39 #include <drm/drm_gem.h>
     40 
     41 struct dma_buf_attachment
     42 struct drm_device;
     43 struct drm_file;
     44 struct drm_gem_cma_object;
     45 struct drm_gem_object;
     46 struct drm_mode_create_dumb;
     47 struct sg_table;
     48 struct vmem;
     49 
     50 struct drm_gem_cma_object {
     51 	struct drm_gem_object base;
     52 	bus_dmamap_t dmamap;
     53 	bus_dma_segment_t dmasegs[1];
     54 	bus_size_t dmasize;
     55 	bus_dma_tag_t dmat;
     56 	struct sg_table *sgt;
     57 	void *vaddr;
     58 	vmem_addr_t vmem_addr;
     59 	struct vmem *vmem_pool;
     60 };
     61 
     62 #define	to_drm_gem_cma_obj(GEM_OBJ)					      \
     63 	container_of((GEM_OBJ), struct drm_gem_cma_object, base)
     64 
     65 extern const struct uvm_pagerops drm_gem_cma_uvm_ops;
     66 
     67 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *, size_t);
     68 int drm_gem_cma_dumb_create(struct drm_file *, struct drm_device *,
     69     struct drm_mode_create_dumb *);
     70 void drm_gem_cma_free_object(struct drm_gem_object *);
     71 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *);
     72 struct drm_gem_object *drm_gem_cma_prime_import_sg_table(struct drm_device *,
     73     struct dma_buf_attachment *, struct sg_table *);
     74 void *drm_gem_cma_prime_vmap(struct drm_gem_object *);
     75 void drm_gem_cma_prime_vunmap(struct drm_gem_object *, void *);
     76 
     77 #endif	/* _DRM_DRM_GEM_CMA_HELPER_H_ */
     78