1 /* $NetBSD: drm_gem_cma_helper.h,v 1.4 2022/07/02 04:37:15 skrll 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