On Thu, Oct 03, 2019 at 11:31:25AM -0700, Juston Li wrote:
> From: Daniel Stone <daniels@xxxxxxxxxxxxx>
>
> getfb2 allows us to pass multiple planes and modifiers, just like addfb2
> over addfb.
>
> Changes since v1:
> - unused modifiers set to 0 instead of DRM_FORMAT_MOD_INVALID
> - update ioctl number
>
> Signed-off-by: Daniel Stone <daniels@xxxxxxxxxxxxx>
> Signed-off-by: Juston Li <juston.li@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_crtc_internal.h | 2 +
> drivers/gpu/drm/drm_framebuffer.c | 110 ++++++++++++++++++++++++++++
> drivers/gpu/drm/drm_ioctl.c | 1 +
> include/uapi/drm/drm.h | 2 +
> 4 files changed, 115 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
> index c7d5e4c21423..16f2413403aa 100644
> --- a/drivers/gpu/drm/drm_crtc_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_internal.h
> @@ -216,6 +216,8 @@ int drm_mode_rmfb_ioctl(struct drm_device *dev,
> void *data, struct drm_file *file_priv);
> int drm_mode_getfb(struct drm_device *dev,
> void *data, struct drm_file *file_priv);
> +int drm_mode_getfb2_ioctl(struct drm_device *dev,
> + void *data, struct drm_file *file_priv);
> int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
> void *data, struct drm_file *file_priv);
>
> diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
> index 57564318ceea..6db54f177443 100644
> --- a/drivers/gpu/drm/drm_framebuffer.c
> +++ b/drivers/gpu/drm/drm_framebuffer.c
> @@ -31,6 +31,7 @@
> #include <drm/drm_file.h>
> #include <drm/drm_fourcc.h>
> #include <drm/drm_framebuffer.h>
> +#include <drm/drm_gem.h>
> #include <drm/drm_print.h>
> #include <drm/drm_util.h>
>
> @@ -548,7 +549,116 @@ int drm_mode_getfb(struct drm_device *dev,
>
> out:
> drm_framebuffer_put(fb);
> + return ret;
> +}
> +
> +/**
> + * drm_mode_getfb2 - get extended FB info
> + * @dev: drm device for the ioctl
> + * @data: data pointer for the ioctl
> + * @file_priv: drm file for the ioctl call
> + *
> + * Lookup the FB given its ID and return info about it.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_getfb2_ioctl(struct drm_device *dev,
> + void *data, struct drm_file *file_priv)
> +{
> + struct drm_mode_fb_cmd2 *r = data;
> + struct drm_framebuffer *fb;
> + unsigned int i;
> + int ret;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id);
> + if (!fb)
> + return -ENOENT;
> +
> + /* For multi-plane framebuffers, we require the driver to place the
> + * GEM objects directly in the drm_framebuffer. For single-plane
> + * framebuffers, we can fall back to create_handle.
> + */
> + if (!fb->obj[0] &&
> + (fb->format->num_planes > 1 || !fb->funcs->create_handle)) {
> + ret = -ENODEV;
> + goto out;
> + }
> +
> + r->height = fb->height;
> + r->width = fb->width;
> + r->pixel_format = fb->format->format;
> +
> + r->flags = 0;
> + if (dev->mode_config.allow_fb_modifiers)
> + r->flags |= DRM_MODE_FB_MODIFIERS;
> +
> + for (i = 0; i < ARRAY_SIZE(r->handles); i++) {
> + r->handles[i] = 0;
> + r->pitches[i] = 0;
> + r->offsets[i] = 0;
> + r->modifier[i] = 0;
> + }
>
> + for (i = 0; i < fb->format->num_planes; i++) {
> + int j;
> +
> + r->pitches[i] = fb->pitches[i];
> + r->offsets[i] = fb->offsets[i];
> + if (dev->mode_config.allow_fb_modifiers)
> + r->modifier[i] = fb->modifier;
> +
> + /* If we reuse the same object for multiple planes, also
> + * return the same handle.
> + */
> + for (j = 0; j < i; j++) {
> + if (fb->obj[i] == fb->obj[j]) {
> + r->handles[i] = r->handles[j];
> + break;
> + }
> + }
> +
> + if (r->handles[i])
> + continue;
> +
> + if (fb->obj[i]) {
> + ret = drm_gem_handle_create(file_priv, fb->obj[i],
> + &r->handles[i]);
> + } else {
> + WARN_ON(i > 0);
> + ret = fb->funcs->create_handle(fb, file_priv,
> + &r->handles[i]);
> + }
getfb1 doesn't allow non-master/root to see the handles. Here we don't
seem to have that same protection?
> +
> + if (ret != 0)
> + goto out;
Could be just 'break;' and then we wouldn't even need the label.
Rest lgtm.
> + }
> +
> +out:
> + if (ret != 0) {
> + /* Delete any previously-created handles on failure. */
> + for (i = 0; i < ARRAY_SIZE(r->handles); i++) {
> + int j;
> +
> + if (r->handles[i])
> + drm_gem_handle_delete(file_priv, r->handles[i]);
> +
> + /* Zero out any handles identical to the one we just
> + * deleted.
> + */
> + for (j = i + 1; j < ARRAY_SIZE(r->handles); j++) {
> + if (r->handles[j] == r->handles[i])
> + r->handles[j] = 0;
> + }
> + }
> + }
> +
> + drm_framebuffer_put(fb);
> return ret;
> }
>
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index fcd728d7cf72..b1fafce3ad8c 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -671,6 +671,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_connector_property_set_ioctl, DRM_MASTER),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, 0),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, 0),
> + DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB2, drm_mode_getfb2_ioctl, 0),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb_ioctl, 0),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2_ioctl, 0),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb_ioctl, 0),
> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
> index 8a5b2f8f8eb9..021f33675ba2 100644
> --- a/include/uapi/drm/drm.h
> +++ b/include/uapi/drm/drm.h
> @@ -947,6 +947,8 @@ extern "C" {
> #define DRM_IOCTL_SYNCOBJ_TRANSFER DRM_IOWR(0xCC, struct drm_syncobj_transfer)
> #define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL DRM_IOWR(0xCD, struct drm_syncobj_timeline_array)
>
> +#define DRM_IOCTL_MODE_GETFB2 DRM_IOWR(0xCE, struct drm_mode_fb_cmd2)
> +
> /**
> * Device specific ioctls should only be in their respective headers
> * The device specific ioctl range is from 0x40 to 0x9f.
> --
> 2.21.0
--
Ville Syrjälä
Intel
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