drm/msm/msm_gem_prime.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) 2013 Red Hat
0004  * Author: Rob Clark <robdclark@gmail.com>
0005  */
0006
0007 #include <linux/dma-buf.h>
0008
0009 #include <drm/drm_prime.h>
0010
0011 #include "msm_drv.h"
0012 #include "msm_gem.h"
0013
0014 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
0015 {
0016     int ret;
0017
0018     /* Ensure the mmap offset is initialized.  We lazily initialize it,
0019      * so if it has not been first mmap'd directly as a GEM object, the
0020      * mmap offset will not be already initialized.
0021      */
0022     ret = drm_gem_create_mmap_offset(obj);
0023     if (ret)
0024         return ret;
0025
0026     return drm_gem_prime_mmap(obj, vma);
0027 }
0028
0029 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
0030 {
0031     struct msm_gem_object *msm_obj = to_msm_bo(obj);
0032     int npages = obj->size >> PAGE_SHIFT;
0033
0034     if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
0035         return ERR_PTR(-ENOMEM);
0036
0037     return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
0038 }
0039
0040 int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
0041 {
0042     void *vaddr;
0043
0044     vaddr = msm_gem_get_vaddr(obj);
0045     if (IS_ERR(vaddr))
0046         return PTR_ERR(vaddr);
0047     iosys_map_set_vaddr(map, vaddr);
0048
0049     return 0;
0050 }
0051
0052 void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
0053 {
0054     msm_gem_put_vaddr(obj);
0055 }
0056
0057 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
0058         struct dma_buf_attachment *attach, struct sg_table *sg)
0059 {
0060     return msm_gem_import(dev, attach->dmabuf, sg);
0061 }
0062
0063 int msm_gem_prime_pin(struct drm_gem_object *obj)
0064 {
0065     if (!obj->import_attach)
0066         msm_gem_get_pages(obj);
0067     return 0;
0068 }
0069
0070 void msm_gem_prime_unpin(struct drm_gem_object *obj)
0071 {
0072     if (!obj->import_attach)
0073         msm_gem_put_pages(obj);
0074 }