drm/vkms: map/unmap buffers in [prepare/cleanup]_fb hooks
This patch map/unmap GEM backing memory to kernel address space in prepare/cleanup_fb respectively and cache the virtual address for later use. Signed-off-by: Haneen Mohammed <hamohammed.sa@gmail.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/17d19f61b6539ce1b614c59762d04d816261b307.1532446182.git.hamohammed.sa@gmail.com
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@ -9,6 +9,7 @@
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#include "vkms_drv.h"
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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static const struct drm_plane_funcs vkms_plane_funcs = {
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.update_plane = drm_atomic_helper_update_plane,
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@ -24,8 +25,41 @@ static void vkms_primary_plane_update(struct drm_plane *plane,
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{
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}
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static int vkms_prepare_fb(struct drm_plane *plane,
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struct drm_plane_state *state)
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{
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struct drm_gem_object *gem_obj;
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struct vkms_gem_object *vkms_obj;
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int ret;
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if (!state->fb)
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return 0;
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gem_obj = drm_gem_fb_get_obj(state->fb, 0);
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vkms_obj = drm_gem_to_vkms_gem(gem_obj);
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ret = vkms_gem_vmap(gem_obj);
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if (ret)
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DRM_ERROR("vmap failed: %d\n", ret);
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return drm_gem_fb_prepare_fb(plane, state);
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}
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static void vkms_cleanup_fb(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct drm_gem_object *gem_obj;
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if (!old_state->fb)
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return;
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gem_obj = drm_gem_fb_get_obj(old_state->fb, 0);
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vkms_gem_vunmap(gem_obj);
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}
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static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
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.atomic_update = vkms_primary_plane_update,
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.prepare_fb = vkms_prepare_fb,
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.cleanup_fb = vkms_cleanup_fb,
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};
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struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
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