diff mbox series

drm/amdgpu: Verify bo size can fit framebuffer size on init.

Message ID 20210304191534.1542241-1-markyacoub@chromium.org (mailing list archive)
State New, archived
Headers show
Series drm/amdgpu: Verify bo size can fit framebuffer size on init. | expand

Commit Message

Mark Yacoub March 4, 2021, 7:15 p.m. UTC
From: Mark Yacoub <markyacoub@google.com>

To initialize the framebuffer, use drm_gem_fb_init_with_funcs which
verifies that the BO size can fit the FB size by calculating the minimum
expected size of each plane.

The bug was caught using igt-gpu-tools test: kms_addfb_basic.too-high
and kms_addfb_basic.bo-too-small

Tested on ChromeOS Zork by turning on the display and running a YT
video.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 66 ++++++++++++++++-----
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c      |  4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h    |  8 +++
 3 files changed, 62 insertions(+), 16 deletions(-)

Comments

Alex Deucher March 8, 2021, 9:20 p.m. UTC | #1
On Thu, Mar 4, 2021 at 2:15 PM Mark Yacoub <markyacoub@chromium.org> wrote:
>
> From: Mark Yacoub <markyacoub@google.com>
>
> To initialize the framebuffer, use drm_gem_fb_init_with_funcs which
> verifies that the BO size can fit the FB size by calculating the minimum
> expected size of each plane.
>
> The bug was caught using igt-gpu-tools test: kms_addfb_basic.too-high
> and kms_addfb_basic.bo-too-small
>
> Tested on ChromeOS Zork by turning on the display and running a YT
> video.
>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Mark Yacoub <markyacoub@chromium.org>

Thanks for the patch.  Just a few minor comments below.

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 66 ++++++++++++++++-----
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c      |  4 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h    |  8 +++
>  3 files changed, 62 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> index 48cb33e5b3826..554038e5bbf6a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> @@ -870,18 +870,59 @@ static int amdgpu_display_get_fb_info(const struct amdgpu_framebuffer *amdgpu_fb
>         return r;
>  }
>
> -int amdgpu_display_framebuffer_init(struct drm_device *dev,
> -                                   struct amdgpu_framebuffer *rfb,
> -                                   const struct drm_mode_fb_cmd2 *mode_cmd,
> -                                   struct drm_gem_object *obj)
> +int amdgpu_display_gem_fb_init(struct drm_device *dev,
> +                              struct amdgpu_framebuffer *rfb,
> +                              const struct drm_mode_fb_cmd2 *mode_cmd,
> +                              struct drm_gem_object *obj)
>  {
> -       int ret, i;
> +       int ret;

Please add a new line here.

>         rfb->base.obj[0] = obj;
>         drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
>         ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
>         if (ret)
> -               goto fail;
> +               goto err;
> +
> +       ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
> +       if (ret)
> +               goto err;
> +
> +       return 0;
> +err:
> +       drm_err(dev, "Failed to init gem fb: %d\n", ret);
> +       rfb->base.obj[0] = NULL;
> +       return ret;
> +}
> +
> +int amdgpu_display_gem_fb_verify_and_init(
> +       struct drm_device *dev, struct amdgpu_framebuffer *rfb,
> +       struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd,
> +       struct drm_gem_object *obj)
> +{
> +       int ret;
> +       rfb->base.obj[0] = obj;
> +       // Verify that bo size can fit the fb size.

Please change this to use C style comments.

> +       ret = drm_gem_fb_init_with_funcs(dev, &rfb->base, file_priv, mode_cmd,
> +                                        &amdgpu_fb_funcs);
> +       if (ret)
> +               goto err;
>
> +       ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
> +       if (ret)
> +               goto err;
> +
> +       return 0;
> +err:
> +       drm_err(dev, "Failed to verify and init gem fb: %d\n", ret);
> +       rfb->base.obj[0] = NULL;
> +       return ret;
> +}
> +
> +int amdgpu_display_framebuffer_init(struct drm_device *dev,
> +                                   struct amdgpu_framebuffer *rfb,
> +                                   const struct drm_mode_fb_cmd2 *mode_cmd,
> +                                   struct drm_gem_object *obj)
> +{
> +       int ret, i;

New line here.

>         /*
>          * This needs to happen before modifier conversion as that might change
>          * the number of planes.
> @@ -891,13 +932,13 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
>                         drm_dbg_kms(dev, "Plane 0 and %d have different BOs: %u vs. %u\n",
>                                     i, mode_cmd->handles[0], mode_cmd->handles[i]);
>                         ret = -EINVAL;
> -                       goto fail;
> +                       return ret;
>                 }
>         }
>
>         ret = amdgpu_display_get_fb_info(rfb, &rfb->tiling_flags, &rfb->tmz_surface);
>         if (ret)
> -               goto fail;
> +               return ret;
>
>         if (dev->mode_config.allow_fb_modifiers &&
>             !(rfb->base.flags & DRM_MODE_FB_MODIFIERS)) {
> @@ -905,7 +946,7 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
>                 if (ret) {
>                         drm_dbg_kms(dev, "Failed to convert tiling flags 0x%llX to a modifier",
>                                     rfb->tiling_flags);
> -                       goto fail;
> +                       return ret;
>                 }
>         }
>
> @@ -915,10 +956,6 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
>         }
>
>         return 0;
> -
> -fail:
> -       rfb->base.obj[0] = NULL;
> -       return ret;
>  }
>
>  struct drm_framebuffer *
> @@ -953,7 +990,8 @@ amdgpu_display_user_framebuffer_create(struct drm_device *dev,
>                 return ERR_PTR(-ENOMEM);
>         }
>
> -       ret = amdgpu_display_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
> +       ret = amdgpu_display_gem_fb_verify_and_init(dev, amdgpu_fb, file_priv,
> +                                                   mode_cmd, obj);
>         if (ret) {
>                 kfree(amdgpu_fb);
>                 drm_gem_object_put(obj);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> index 0bf7d36c6686d..22157bd7017c9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> @@ -232,8 +232,8 @@ static int amdgpufb_create(struct drm_fb_helper *helper,
>                 goto out;
>         }
>
> -       ret = amdgpu_display_framebuffer_init(adev_to_drm(adev), &rfbdev->rfb,
> -                                             &mode_cmd, gobj);
> +       ret = amdgpu_display_gem_fb_init(adev_to_drm(adev), &rfbdev->rfb,
> +                                        &mode_cmd, gobj);
>         if (ret) {
>                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
>                 goto out;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> index 319cb19e1b99f..cb0b581bbce7b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> @@ -602,6 +602,14 @@ int amdgpu_display_get_crtc_scanoutpos(struct drm_device *dev,
>                         int *hpos, ktime_t *stime, ktime_t *etime,
>                         const struct drm_display_mode *mode);
>
> +int amdgpu_display_gem_fb_init(struct drm_device *dev,
> +                              struct amdgpu_framebuffer *rfb,
> +                              const struct drm_mode_fb_cmd2 *mode_cmd,
> +                              struct drm_gem_object *obj);
> +int amdgpu_display_gem_fb_verify_and_init(
> +       struct drm_device *dev, struct amdgpu_framebuffer *rfb,
> +       struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd,
> +       struct drm_gem_object *obj);
>  int amdgpu_display_framebuffer_init(struct drm_device *dev,
>                                     struct amdgpu_framebuffer *rfb,
>                                     const struct drm_mode_fb_cmd2 *mode_cmd,
> --
> 2.30.1.766.gb4fecdf3b7-goog
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 48cb33e5b3826..554038e5bbf6a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -870,18 +870,59 @@  static int amdgpu_display_get_fb_info(const struct amdgpu_framebuffer *amdgpu_fb
 	return r;
 }
 
-int amdgpu_display_framebuffer_init(struct drm_device *dev,
-				    struct amdgpu_framebuffer *rfb,
-				    const struct drm_mode_fb_cmd2 *mode_cmd,
-				    struct drm_gem_object *obj)
+int amdgpu_display_gem_fb_init(struct drm_device *dev,
+			       struct amdgpu_framebuffer *rfb,
+			       const struct drm_mode_fb_cmd2 *mode_cmd,
+			       struct drm_gem_object *obj)
 {
-	int ret, i;
+	int ret;
 	rfb->base.obj[0] = obj;
 	drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
 	ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
 	if (ret)
-		goto fail;
+		goto err;
+
+	ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	drm_err(dev, "Failed to init gem fb: %d\n", ret);
+	rfb->base.obj[0] = NULL;
+	return ret;
+}
+
+int amdgpu_display_gem_fb_verify_and_init(
+	struct drm_device *dev, struct amdgpu_framebuffer *rfb,
+	struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd,
+	struct drm_gem_object *obj)
+{
+	int ret;
+	rfb->base.obj[0] = obj;
+	// Verify that bo size can fit the fb size.
+	ret = drm_gem_fb_init_with_funcs(dev, &rfb->base, file_priv, mode_cmd,
+					 &amdgpu_fb_funcs);
+	if (ret)
+		goto err;
 
+	ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	drm_err(dev, "Failed to verify and init gem fb: %d\n", ret);
+	rfb->base.obj[0] = NULL;
+	return ret;
+}
+
+int amdgpu_display_framebuffer_init(struct drm_device *dev,
+				    struct amdgpu_framebuffer *rfb,
+				    const struct drm_mode_fb_cmd2 *mode_cmd,
+				    struct drm_gem_object *obj)
+{
+	int ret, i;
 	/*
 	 * This needs to happen before modifier conversion as that might change
 	 * the number of planes.
@@ -891,13 +932,13 @@  int amdgpu_display_framebuffer_init(struct drm_device *dev,
 			drm_dbg_kms(dev, "Plane 0 and %d have different BOs: %u vs. %u\n",
 				    i, mode_cmd->handles[0], mode_cmd->handles[i]);
 			ret = -EINVAL;
-			goto fail;
+			return ret;
 		}
 	}
 
 	ret = amdgpu_display_get_fb_info(rfb, &rfb->tiling_flags, &rfb->tmz_surface);
 	if (ret)
-		goto fail;
+		return ret;
 
 	if (dev->mode_config.allow_fb_modifiers &&
 	    !(rfb->base.flags & DRM_MODE_FB_MODIFIERS)) {
@@ -905,7 +946,7 @@  int amdgpu_display_framebuffer_init(struct drm_device *dev,
 		if (ret) {
 			drm_dbg_kms(dev, "Failed to convert tiling flags 0x%llX to a modifier",
 				    rfb->tiling_flags);
-			goto fail;
+			return ret;
 		}
 	}
 
@@ -915,10 +956,6 @@  int amdgpu_display_framebuffer_init(struct drm_device *dev,
 	}
 
 	return 0;
-
-fail:
-	rfb->base.obj[0] = NULL;
-	return ret;
 }
 
 struct drm_framebuffer *
@@ -953,7 +990,8 @@  amdgpu_display_user_framebuffer_create(struct drm_device *dev,
 		return ERR_PTR(-ENOMEM);
 	}
 
-	ret = amdgpu_display_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
+	ret = amdgpu_display_gem_fb_verify_and_init(dev, amdgpu_fb, file_priv,
+						    mode_cmd, obj);
 	if (ret) {
 		kfree(amdgpu_fb);
 		drm_gem_object_put(obj);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index 0bf7d36c6686d..22157bd7017c9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -232,8 +232,8 @@  static int amdgpufb_create(struct drm_fb_helper *helper,
 		goto out;
 	}
 
-	ret = amdgpu_display_framebuffer_init(adev_to_drm(adev), &rfbdev->rfb,
-					      &mode_cmd, gobj);
+	ret = amdgpu_display_gem_fb_init(adev_to_drm(adev), &rfbdev->rfb,
+					 &mode_cmd, gobj);
 	if (ret) {
 		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 		goto out;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 319cb19e1b99f..cb0b581bbce7b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -602,6 +602,14 @@  int amdgpu_display_get_crtc_scanoutpos(struct drm_device *dev,
 			int *hpos, ktime_t *stime, ktime_t *etime,
 			const struct drm_display_mode *mode);
 
+int amdgpu_display_gem_fb_init(struct drm_device *dev,
+			       struct amdgpu_framebuffer *rfb,
+			       const struct drm_mode_fb_cmd2 *mode_cmd,
+			       struct drm_gem_object *obj);
+int amdgpu_display_gem_fb_verify_and_init(
+	struct drm_device *dev, struct amdgpu_framebuffer *rfb,
+	struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd,
+	struct drm_gem_object *obj);
 int amdgpu_display_framebuffer_init(struct drm_device *dev,
 				    struct amdgpu_framebuffer *rfb,
 				    const struct drm_mode_fb_cmd2 *mode_cmd,