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path: root/drivers/gpu/drm/vkms/vkms_gem.c
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Diffstat (limited to 'drivers/gpu/drm/vkms/vkms_gem.c')
-rw-r--r--drivers/gpu/drm/vkms/vkms_gem.c248
1 files changed, 0 insertions, 248 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_gem.c b/drivers/gpu/drm/vkms/vkms_gem.c
deleted file mode 100644
index a017fc59905e..000000000000
--- a/drivers/gpu/drm/vkms/vkms_gem.c
+++ /dev/null
@@ -1,248 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-
-#include <linux/dma-buf.h>
-#include <linux/shmem_fs.h>
-#include <linux/vmalloc.h>
-#include <drm/drm_prime.h>
-
-#include "vkms_drv.h"
-
-static struct vkms_gem_object *__vkms_gem_create(struct drm_device *dev,
- u64 size)
-{
- struct vkms_gem_object *obj;
- int ret;
-
- obj = kzalloc(sizeof(*obj), GFP_KERNEL);
- if (!obj)
- return ERR_PTR(-ENOMEM);
-
- size = roundup(size, PAGE_SIZE);
- ret = drm_gem_object_init(dev, &obj->gem, size);
- if (ret) {
- kfree(obj);
- return ERR_PTR(ret);
- }
-
- mutex_init(&obj->pages_lock);
-
- return obj;
-}
-
-void vkms_gem_free_object(struct drm_gem_object *obj)
-{
- struct vkms_gem_object *gem = container_of(obj, struct vkms_gem_object,
- gem);
-
- WARN_ON(gem->pages);
- WARN_ON(gem->vaddr);
-
- mutex_destroy(&gem->pages_lock);
- drm_gem_object_release(obj);
- kfree(gem);
-}
-
-vm_fault_t vkms_gem_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct vkms_gem_object *obj = vma->vm_private_data;
- unsigned long vaddr = vmf->address;
- pgoff_t page_offset;
- loff_t num_pages;
- vm_fault_t ret = VM_FAULT_SIGBUS;
-
- page_offset = (vaddr - vma->vm_start) >> PAGE_SHIFT;
- num_pages = DIV_ROUND_UP(obj->gem.size, PAGE_SIZE);
-
- if (page_offset > num_pages)
- return VM_FAULT_SIGBUS;
-
- mutex_lock(&obj->pages_lock);
- if (obj->pages) {
- get_page(obj->pages[page_offset]);
- vmf->page = obj->pages[page_offset];
- ret = 0;
- }
- mutex_unlock(&obj->pages_lock);
- if (ret) {
- struct page *page;
- struct address_space *mapping;
-
- mapping = file_inode(obj->gem.filp)->i_mapping;
- page = shmem_read_mapping_page(mapping, page_offset);
-
- if (!IS_ERR(page)) {
- vmf->page = page;
- ret = 0;
- } else {
- switch (PTR_ERR(page)) {
- case -ENOSPC:
- case -ENOMEM:
- ret = VM_FAULT_OOM;
- break;
- case -EBUSY:
- ret = VM_FAULT_RETRY;
- break;
- case -EFAULT:
- case -EINVAL:
- ret = VM_FAULT_SIGBUS;
- break;
- default:
- WARN_ON(PTR_ERR(page));
- ret = VM_FAULT_SIGBUS;
- break;
- }
- }
- }
- return ret;
-}
-
-static struct drm_gem_object *vkms_gem_create(struct drm_device *dev,
- struct drm_file *file,
- u32 *handle,
- u64 size)
-{
- struct vkms_gem_object *obj;
- int ret;
-
- if (!file || !dev || !handle)
- return ERR_PTR(-EINVAL);
-
- obj = __vkms_gem_create(dev, size);
- if (IS_ERR(obj))
- return ERR_CAST(obj);
-
- ret = drm_gem_handle_create(file, &obj->gem, handle);
- if (ret)
- return ERR_PTR(ret);
-
- return &obj->gem;
-}
-
-int vkms_dumb_create(struct drm_file *file, struct drm_device *dev,
- struct drm_mode_create_dumb *args)
-{
- struct drm_gem_object *gem_obj;
- u64 pitch, size;
-
- if (!args || !dev || !file)
- return -EINVAL;
-
- pitch = args->width * DIV_ROUND_UP(args->bpp, 8);
- size = pitch * args->height;
-
- if (!size)
- return -EINVAL;
-
- gem_obj = vkms_gem_create(dev, file, &args->handle, size);
- if (IS_ERR(gem_obj))
- return PTR_ERR(gem_obj);
-
- args->size = gem_obj->size;
- args->pitch = pitch;
-
- drm_gem_object_put(gem_obj);
-
- DRM_DEBUG_DRIVER("Created object of size %lld\n", size);
-
- return 0;
-}
-
-static struct page **_get_pages(struct vkms_gem_object *vkms_obj)
-{
- struct drm_gem_object *gem_obj = &vkms_obj->gem;
-
- if (!vkms_obj->pages) {
- struct page **pages = drm_gem_get_pages(gem_obj);
-
- if (IS_ERR(pages))
- return pages;
-
- if (cmpxchg(&vkms_obj->pages, NULL, pages))
- drm_gem_put_pages(gem_obj, pages, false, true);
- }
-
- return vkms_obj->pages;
-}
-
-void vkms_gem_vunmap(struct drm_gem_object *obj)
-{
- struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj);
-
- mutex_lock(&vkms_obj->pages_lock);
- if (vkms_obj->vmap_count < 1) {
- WARN_ON(vkms_obj->vaddr);
- WARN_ON(vkms_obj->pages);
- mutex_unlock(&vkms_obj->pages_lock);
- return;
- }
-
- vkms_obj->vmap_count--;
-
- if (vkms_obj->vmap_count == 0) {
- vunmap(vkms_obj->vaddr);
- vkms_obj->vaddr = NULL;
- drm_gem_put_pages(obj, vkms_obj->pages, false, true);
- vkms_obj->pages = NULL;
- }
-
- mutex_unlock(&vkms_obj->pages_lock);
-}
-
-int vkms_gem_vmap(struct drm_gem_object *obj)
-{
- struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj);
- int ret = 0;
-
- mutex_lock(&vkms_obj->pages_lock);
-
- if (!vkms_obj->vaddr) {
- unsigned int n_pages = obj->size >> PAGE_SHIFT;
- struct page **pages = _get_pages(vkms_obj);
-
- if (IS_ERR(pages)) {
- ret = PTR_ERR(pages);
- goto out;
- }
-
- vkms_obj->vaddr = vmap(pages, n_pages, VM_MAP, PAGE_KERNEL);
- if (!vkms_obj->vaddr)
- goto err_vmap;
- }
-
- vkms_obj->vmap_count++;
- goto out;
-
-err_vmap:
- ret = -ENOMEM;
- drm_gem_put_pages(obj, vkms_obj->pages, false, true);
- vkms_obj->pages = NULL;
-out:
- mutex_unlock(&vkms_obj->pages_lock);
- return ret;
-}
-
-struct drm_gem_object *
-vkms_prime_import_sg_table(struct drm_device *dev,
- struct dma_buf_attachment *attach,
- struct sg_table *sg)
-{
- struct vkms_gem_object *obj;
- int npages;
-
- obj = __vkms_gem_create(dev, attach->dmabuf->size);
- if (IS_ERR(obj))
- return ERR_CAST(obj);
-
- npages = PAGE_ALIGN(attach->dmabuf->size) / PAGE_SIZE;
- DRM_DEBUG_PRIME("Importing %d pages\n", npages);
-
- obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
- if (!obj->pages) {
- vkms_gem_free_object(&obj->gem);
- return ERR_PTR(-ENOMEM);
- }
-
- drm_prime_sg_to_page_addr_arrays(sg, obj->pages, NULL, npages);
- return &obj->gem;
-}