drm/bochs: add basic prime support

Just enough to make the generic framebuffer emulation happy.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20190111053752.4004-14-kraxel@redhat.com

diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
index d0d474e..ede22be 100644 (file)
--- a/drivers/gpu/drm/bochs/bochs.h
+++ b/drivers/gpu/drm/bochs/bochs.h
@@ -145,6 +145,13 @@ int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
 int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag);
 int bochs_bo_unpin(struct bochs_bo *bo);
 
+int bochs_gem_prime_pin(struct drm_gem_object *obj);
+void bochs_gem_prime_unpin(struct drm_gem_object *obj);
+void *bochs_gem_prime_vmap(struct drm_gem_object *obj);
+void bochs_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
+int bochs_gem_prime_mmap(struct drm_gem_object *obj,
+                        struct vm_area_struct *vma);
+
 /* bochs_kms.c */
 int bochs_kms_init(struct bochs_device *bochs);
 void bochs_kms_fini(struct bochs_device *bochs);

diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index a8cb22c..a3f4e21 100644 (file)
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -81,7 +81,8 @@ static const struct file_operations bochs_fops = {
 };
 
 static struct drm_driver bochs_driver = {
-       .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+       .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
+                                 DRIVER_PRIME,
        .fops                   = &bochs_fops,
        .name                   = "bochs-drm",
        .desc                   = "bochs dispi vga interface (qemu stdvga)",
@@ -91,6 +92,14 @@ static struct drm_driver bochs_driver = {
        .gem_free_object_unlocked = bochs_gem_free_object,
        .dumb_create            = bochs_dumb_create,
        .dumb_map_offset        = bochs_dumb_mmap_offset,
+
+       .gem_prime_export = drm_gem_prime_export,
+       .gem_prime_import = drm_gem_prime_import,
+       .gem_prime_pin = bochs_gem_prime_pin,
+       .gem_prime_unpin = bochs_gem_prime_unpin,
+       .gem_prime_vmap = bochs_gem_prime_vmap,
+       .gem_prime_vunmap = bochs_gem_prime_vunmap,
+       .gem_prime_mmap = bochs_gem_prime_mmap,
 };
 
 /* ---------------------------------------------------------------------- */

diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
index fcbf354..641a33f 100644 (file)
--- a/drivers/gpu/drm/bochs/bochs_mm.c
+++ b/drivers/gpu/drm/bochs/bochs_mm.c
@@ -395,3 +395,52 @@ int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
        drm_gem_object_put_unlocked(obj);
        return 0;
 }
+
+/* ---------------------------------------------------------------------- */
+
+int bochs_gem_prime_pin(struct drm_gem_object *obj)
+{
+       struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+       return bochs_bo_pin(bo, TTM_PL_FLAG_VRAM);
+}
+
+void bochs_gem_prime_unpin(struct drm_gem_object *obj)
+{
+       struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+       bochs_bo_unpin(bo);
+}
+
+void *bochs_gem_prime_vmap(struct drm_gem_object *obj)
+{
+       struct bochs_bo *bo = gem_to_bochs_bo(obj);
+       bool is_iomem;
+       int ret;
+
+       ret = bochs_bo_pin(bo, TTM_PL_FLAG_VRAM);
+       if (ret)
+               return NULL;
+       ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+       if (ret) {
+               bochs_bo_unpin(bo);
+               return NULL;
+       }
+       return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
+}
+
+void bochs_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
+{
+       struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+       ttm_bo_kunmap(&bo->kmap);
+       bochs_bo_unpin(bo);
+}
+
+int bochs_gem_prime_mmap(struct drm_gem_object *obj,
+                        struct vm_area_struct *vma)
+{
+       struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+       return ttm_fbdev_mmap(vma, &bo->bo);
+}