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path: root/drivers/gpu/drm/udl/udl_gem.c
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Diffstat (limited to 'drivers/gpu/drm/udl/udl_gem.c')
-rw-r--r--drivers/gpu/drm/udl/udl_gem.c253
1 files changed, 64 insertions, 189 deletions
diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index b23a5c2fcd80..b6e26f98aa0a 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -6,226 +6,101 @@
#include <linux/dma-buf.h>
#include <linux/vmalloc.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_mode.h>
#include <drm/drm_prime.h>
#include "udl_drv.h"
-struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
- size_t size)
-{
- struct udl_gem_object *obj;
-
- obj = kzalloc(sizeof(*obj), GFP_KERNEL);
- if (obj == NULL)
- return NULL;
-
- if (drm_gem_object_init(dev, &obj->base, size) != 0) {
- kfree(obj);
- return NULL;
- }
-
- obj->flags = UDL_BO_CACHEABLE;
- return obj;
-}
-
-static int
-udl_gem_create(struct drm_file *file,
- struct drm_device *dev,
- uint64_t size,
- uint32_t *handle_p)
-{
- struct udl_gem_object *obj;
- int ret;
- u32 handle;
-
- size = roundup(size, PAGE_SIZE);
-
- obj = udl_gem_alloc_object(dev, size);
- if (obj == NULL)
- return -ENOMEM;
-
- ret = drm_gem_handle_create(file, &obj->base, &handle);
- if (ret) {
- drm_gem_object_release(&obj->base);
- kfree(obj);
- return ret;
- }
-
- drm_gem_object_put_unlocked(&obj->base);
- *handle_p = handle;
- return 0;
-}
-
-static void update_vm_cache_attr(struct udl_gem_object *obj,
- struct vm_area_struct *vma)
-{
- DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags);
-
- /* non-cacheable as default. */
- if (obj->flags & UDL_BO_CACHEABLE) {
- vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
- } else if (obj->flags & UDL_BO_WC) {
- vma->vm_page_prot =
- pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
- } else {
- vma->vm_page_prot =
- pgprot_noncached(vm_get_page_prot(vma->vm_flags));
- }
-}
-
-int udl_dumb_create(struct drm_file *file,
- struct drm_device *dev,
- struct drm_mode_create_dumb *args)
-{
- args->pitch = args->width * DIV_ROUND_UP(args->bpp, 8);
- args->size = args->pitch * args->height;
- return udl_gem_create(file, dev,
- args->size, &args->handle);
-}
+/*
+ * GEM object funcs
+ */
-int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
+static int udl_gem_object_mmap(struct drm_gem_object *obj,
+ struct vm_area_struct *vma)
{
int ret;
- ret = drm_gem_mmap(filp, vma);
+ ret = drm_gem_shmem_mmap(obj, vma);
if (ret)
return ret;
- vma->vm_flags &= ~VM_PFNMAP;
- vma->vm_flags |= VM_MIXEDMAP;
-
- update_vm_cache_attr(to_udl_bo(vma->vm_private_data), vma);
-
- return ret;
-}
-
-vm_fault_t udl_gem_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct udl_gem_object *obj = to_udl_bo(vma->vm_private_data);
- struct page *page;
- unsigned int page_offset;
-
- page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
-
- if (!obj->pages)
- return VM_FAULT_SIGBUS;
-
- page = obj->pages[page_offset];
- return vmf_insert_page(vma, vmf->address, page);
-}
-
-int udl_gem_get_pages(struct udl_gem_object *obj)
-{
- struct page **pages;
-
- if (obj->pages)
- return 0;
-
- pages = drm_gem_get_pages(&obj->base);
- if (IS_ERR(pages))
- return PTR_ERR(pages);
-
- obj->pages = pages;
+ vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
+ if (obj->import_attach)
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
return 0;
}
-void udl_gem_put_pages(struct udl_gem_object *obj)
-{
- if (obj->base.import_attach) {
- kvfree(obj->pages);
- obj->pages = NULL;
- return;
- }
-
- drm_gem_put_pages(&obj->base, obj->pages, false, false);
- obj->pages = NULL;
-}
-
-int udl_gem_vmap(struct udl_gem_object *obj)
+static void *udl_gem_object_vmap(struct drm_gem_object *obj)
{
- int page_count = obj->base.size / PAGE_SIZE;
+ struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
int ret;
- if (obj->base.import_attach) {
- obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf);
- if (!obj->vmapping)
- return -ENOMEM;
- return 0;
- }
-
- ret = udl_gem_get_pages(obj);
+ ret = mutex_lock_interruptible(&shmem->vmap_lock);
if (ret)
- return ret;
+ return ERR_PTR(ret);
- obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL);
- if (!obj->vmapping)
- return -ENOMEM;
- return 0;
-}
+ if (shmem->vmap_use_count++ > 0)
+ goto out;
-void udl_gem_vunmap(struct udl_gem_object *obj)
-{
- if (obj->base.import_attach) {
- dma_buf_vunmap(obj->base.import_attach->dmabuf, obj->vmapping);
- return;
+ ret = drm_gem_shmem_get_pages(shmem);
+ if (ret)
+ goto err_zero_use;
+
+ if (obj->import_attach)
+ shmem->vaddr = dma_buf_vmap(obj->import_attach->dmabuf);
+ else
+ shmem->vaddr = vmap(shmem->pages, obj->size >> PAGE_SHIFT,
+ VM_MAP, PAGE_KERNEL);
+
+ if (!shmem->vaddr) {
+ DRM_DEBUG_KMS("Failed to vmap pages\n");
+ ret = -ENOMEM;
+ goto err_put_pages;
}
- vunmap(obj->vmapping);
-
- udl_gem_put_pages(obj);
+out:
+ mutex_unlock(&shmem->vmap_lock);
+ return shmem->vaddr;
+
+err_put_pages:
+ drm_gem_shmem_put_pages(shmem);
+err_zero_use:
+ shmem->vmap_use_count = 0;
+ mutex_unlock(&shmem->vmap_lock);
+ return ERR_PTR(ret);
}
-void udl_gem_free_object(struct drm_gem_object *gem_obj)
-{
- struct udl_gem_object *obj = to_udl_bo(gem_obj);
+static const struct drm_gem_object_funcs udl_gem_object_funcs = {
+ .free = drm_gem_shmem_free_object,
+ .print_info = drm_gem_shmem_print_info,
+ .pin = drm_gem_shmem_pin,
+ .unpin = drm_gem_shmem_unpin,
+ .get_sg_table = drm_gem_shmem_get_sg_table,
+ .vmap = udl_gem_object_vmap,
+ .vunmap = drm_gem_shmem_vunmap,
+ .mmap = udl_gem_object_mmap,
+};
- if (obj->vmapping)
- udl_gem_vunmap(obj);
-
- if (gem_obj->import_attach) {
- drm_prime_gem_destroy(gem_obj, obj->sg);
- put_device(gem_obj->dev->dev);
- }
-
- if (obj->pages)
- udl_gem_put_pages(obj);
-
- drm_gem_free_mmap_offset(gem_obj);
-}
+/*
+ * Helpers for struct drm_driver
+ */
-/* the dumb interface doesn't work with the GEM straight MMAP
- interface, it expects to do MMAP on the drm fd, like normal */
-int udl_gem_mmap(struct drm_file *file, struct drm_device *dev,
- uint32_t handle, uint64_t *offset)
+struct drm_gem_object *udl_driver_gem_create_object(struct drm_device *dev,
+ size_t size)
{
- struct udl_gem_object *gobj;
+ struct drm_gem_shmem_object *shmem;
struct drm_gem_object *obj;
- struct udl_device *udl = to_udl(dev);
- int ret = 0;
-
- mutex_lock(&udl->gem_lock);
- obj = drm_gem_object_lookup(file, handle);
- if (obj == NULL) {
- ret = -ENOENT;
- goto unlock;
- }
- gobj = to_udl_bo(obj);
- ret = udl_gem_get_pages(gobj);
- if (ret)
- goto out;
- ret = drm_gem_create_mmap_offset(obj);
- if (ret)
- goto out;
+ shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
+ if (!shmem)
+ return NULL;
- *offset = drm_vma_node_offset_addr(&gobj->base.vma_node);
+ obj = &shmem->base;
+ obj->funcs = &udl_gem_object_funcs;
-out:
- drm_gem_object_put_unlocked(&gobj->base);
-unlock:
- mutex_unlock(&udl->gem_lock);
- return ret;
+ return obj;
}