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Commit e133e737 authored by Thomas Hellstrom's avatar Thomas Hellstrom Committed by Dave Airlie
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drm/vmwgfx: Prune modes based on available VRAM size 



This needs to be reviewed once we support screen objects and don't rely
on VRAM for the frame-buffer.

Also fix some integer overflow issues pointed out by Michel Daenzer.

Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 3a939a5e

drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

+3 −0
Original line number Diff line number Diff line
@@ -522,6 +522,9 @@ void vmw_kms_write_svga(struct vmw_private *vmw_priv, 
int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,

				struct drm_file *file_priv);

void vmw_kms_idle_workqueues(struct vmw_master *vmaster);

bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,

				uint32_t pitch,

				uint32_t height);

u32 vmw_get_vblank_counter(struct drm_device *dev, int crtc);



/**

drivers/gpu/drm/vmwgfx/vmwgfx_fb.c

+7 −0
Original line number Diff line number Diff line
@@ -144,6 +144,13 @@ static int vmw_fb_check_var(struct fb_var_screeninfo *var, 
		return -EINVAL;

	}



	if (!vmw_kms_validate_mode_vram(vmw_priv,

					info->fix.line_length,

					var->yoffset + var->yres)) {

		DRM_ERROR("Requested geom can not fit in framebuffer\n");

		return -EINVAL;

	}



	return 0;

}

drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

+9 −2
Original line number Diff line number Diff line
@@ -838,7 +838,7 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev, 
	struct vmw_framebuffer *vfb = NULL;

	struct vmw_surface *surface = NULL;

	struct vmw_dma_buffer *bo = NULL;

	unsigned int required_size;

	u64 required_size;

	int ret;



	/**
@@ -848,7 +848,7 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev, 
	 */



	required_size = mode_cmd->pitch * mode_cmd->height;

	if (unlikely(required_size > dev_priv->vram_size)) {

	if (unlikely(required_size > (u64) dev_priv->vram_size)) {

		DRM_ERROR("VRAM size is too small for requested mode.\n");

		return NULL;

	}
@@ -1133,6 +1133,13 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, 
	return ret;

}



bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,

				uint32_t pitch,

				uint32_t height)

{

	return ((u64) pitch * (u64) height) < (u64) dev_priv->vram_size;

}



u32 vmw_get_vblank_counter(struct drm_device *dev, int crtc)

{

	return 0;

drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

+19 −9
Original line number Diff line number Diff line
@@ -427,7 +427,9 @@ static int vmw_ldu_connector_fill_modes(struct drm_connector *connector, 
{

	struct vmw_legacy_display_unit *ldu = vmw_connector_to_ldu(connector);

	struct drm_device *dev = connector->dev;

	struct vmw_private *dev_priv = vmw_priv(dev);

	struct drm_display_mode *mode = NULL;

	struct drm_display_mode *bmode;

	struct drm_display_mode prefmode = { DRM_MODE("preferred",

		DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,

		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -443,6 +445,8 @@ static int vmw_ldu_connector_fill_modes(struct drm_connector *connector, 
		mode->hdisplay = ldu->pref_width;

		mode->vdisplay = ldu->pref_height;

		mode->vrefresh = drm_mode_vrefresh(mode);

		if (vmw_kms_validate_mode_vram(dev_priv, mode->hdisplay * 2,

					       mode->vdisplay)) {

			drm_mode_probed_add(connector, mode);



			if (ldu->pref_mode) {
@@ -452,13 +456,19 @@ static int vmw_ldu_connector_fill_modes(struct drm_connector *connector, 


			ldu->pref_mode = mode;

		}

	}



	for (i = 0; vmw_ldu_connector_builtin[i].type != 0; i++) {

		if (vmw_ldu_connector_builtin[i].hdisplay > max_width ||

		    vmw_ldu_connector_builtin[i].vdisplay > max_height)

		bmode = &vmw_ldu_connector_builtin[i];

		if (bmode->hdisplay > max_width ||

		    bmode->vdisplay > max_height)

			continue;



		if (!vmw_kms_validate_mode_vram(dev_priv, bmode->hdisplay * 2,

						bmode->vdisplay))

			continue;



		mode = drm_mode_duplicate(dev, &vmw_ldu_connector_builtin[i]);

		mode = drm_mode_duplicate(dev, bmode);

		if (!mode)

			return 0;

		mode->vrefresh = drm_mode_vrefresh(mode);