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nouveau_prime.c revision 1.1 
      1 /*
      2  * Copyright 2011 Red Hat Inc.
      3  *
      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:
     10  *
     11  * The above copyright notice and this permission notice shall be included in
     12  * all copies or substantial portions of the Software.
     13  *
     14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20  * OTHER DEALINGS IN THE SOFTWARE.
     21  *
     22  * Authors: Dave Airlie
     23  */
     24 
     25 #include <drm/drmP.h>
     26 
     27 #include "nouveau_drm.h"
     28 #include "nouveau_gem.h"
     29 
     30 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
     31 {
     32 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     33 	int npages = nvbo->bo.num_pages;
     34 
     35 	return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
     36 }
     37 
     38 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
     39 {
     40 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     41 	int ret;
     42 
     43 	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
     44 			  &nvbo->dma_buf_vmap);
     45 	if (ret)
     46 		return ERR_PTR(ret);
     47 
     48 	return nvbo->dma_buf_vmap.virtual;
     49 }
     50 
     51 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
     52 {
     53 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     54 
     55 	ttm_bo_kunmap(&nvbo->dma_buf_vmap);
     56 }
     57 
     58 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
     59 							 size_t size,
     60 							 struct sg_table *sg)
     61 {
     62 	struct nouveau_bo *nvbo;
     63 	u32 flags = 0;
     64 	int ret;
     65 
     66 	flags = TTM_PL_FLAG_TT;
     67 
     68 	ret = nouveau_bo_new(dev, size, 0, flags, 0, 0,
     69 			     sg, &nvbo);
     70 	if (ret)
     71 		return ERR_PTR(ret);
     72 
     73 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
     74 
     75 	/* Initialize the embedded gem-object. We return a single gem-reference
     76 	 * to the caller, instead of a normal nouveau_bo ttm reference. */
     77 	ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
     78 	if (ret) {
     79 		nouveau_bo_ref(NULL, &nvbo);
     80 		return ERR_PTR(-ENOMEM);
     81 	}
     82 
     83 	return &nvbo->gem;
     84 }
     85 
     86 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
     87 {
     88 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     89 	int ret;
     90 
     91 	/* pin buffer into GTT */
     92 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
     93 	if (ret)
     94 		return -EINVAL;
     95 
     96 	return 0;
     97 }
     98 
     99 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
    100 {
    101 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
    102 
    103 	nouveau_bo_unpin(nvbo);
    104 }
    105