Home | History | Annotate | Line # | Download | only in nouveau 
      1 /*	$NetBSD: nouveau_prime.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2011 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Dave Airlie
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: nouveau_prime.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $");
     29 
     30 #include <linux/dma-buf.h>
     31 
     32 #include "nouveau_drv.h"
     33 #include "nouveau_gem.h"
     34 
     35 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
     36 {
     37 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     38 	int npages = nvbo->bo.num_pages;
     39 
     40 	return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
     41 }
     42 
     43 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
     44 {
     45 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     46 	int ret;
     47 
     48 	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
     49 			  &nvbo->dma_buf_vmap);
     50 	if (ret)
     51 		return ERR_PTR(ret);
     52 
     53 	return nvbo->dma_buf_vmap.virtual;
     54 }
     55 
     56 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
     57 {
     58 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     59 
     60 	ttm_bo_kunmap(&nvbo->dma_buf_vmap);
     61 }
     62 
     63 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
     64 							 struct dma_buf_attachment *attach,
     65 							 struct sg_table *sg)
     66 {
     67 	struct nouveau_drm *drm = nouveau_drm(dev);
     68 	struct drm_gem_object *obj;
     69 	struct nouveau_bo *nvbo;
     70 	struct dma_resv *robj = attach->dmabuf->resv;
     71 	u64 size = attach->dmabuf->size;
     72 	u32 flags = 0;
     73 	int align = 0;
     74 	int ret;
     75 
     76 	flags = TTM_PL_FLAG_TT;
     77 
     78 	dma_resv_lock(robj, NULL);
     79 	nvbo = nouveau_bo_alloc(&drm->client, &size, &align, flags, 0, 0);
     80 	if (IS_ERR(nvbo)) {
     81 		obj = ERR_CAST(nvbo);
     82 		goto unlock;
     83 	}
     84 
     85 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
     86 
     87 	/* Initialize the embedded gem-object. We return a single gem-reference
     88 	 * to the caller, instead of a normal nouveau_bo ttm reference. */
     89 	ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
     90 	if (ret) {
     91 		nouveau_bo_ref(NULL, &nvbo);
     92 		obj = ERR_PTR(-ENOMEM);
     93 		goto unlock;
     94 	}
     95 
     96 	ret = nouveau_bo_init(nvbo, size, align, flags, sg, robj);
     97 	if (ret) {
     98 		nouveau_bo_ref(NULL, &nvbo);
     99 		obj = ERR_PTR(ret);
    100 		goto unlock;
    101 	}
    102 
    103 	obj = &nvbo->bo.base;
    104 
    105 unlock:
    106 	dma_resv_unlock(robj);
    107 	return obj;
    108 }
    109 
    110 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
    111 {
    112 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
    113 	int ret;
    114 
    115 	/* pin buffer into GTT */
    116 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
    117 	if (ret)
    118 		return -EINVAL;
    119 
    120 	return 0;
    121 }
    122 
    123 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
    124 {
    125 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
    126 
    127 	nouveau_bo_unpin(nvbo);
    128 }
    129