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drm/vmwgfx: Prune modes based on available VRAM size

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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: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2010-10-05 12:43:04 +02:00 • committed by Dave Airlie
commit e133e73712
4 changed files with 38 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View file

@ -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);
/**

7
drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
View file

@ -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;
}

11
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
View file

@ -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 @@ out_unlock:
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;

28
drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
View file

@ -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,
@ -443,22 +445,30 @@ 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);
drm_mode_probed_add(connector, mode);
if (vmw_kms_validate_mode_vram(dev_priv, mode->hdisplay * 2,
mode->vdisplay)) {
drm_mode_probed_add(connector, mode);
if (ldu->pref_mode) {
list_del_init(&ldu->pref_mode->head);
drm_mode_destroy(dev, ldu->pref_mode);
if (ldu->pref_mode) {
list_del_init(&ldu->pref_mode->head);
drm_mode_destroy(dev, ldu->pref_mode);
}
ldu->pref_mode = mode;
}
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;
mode = drm_mode_duplicate(dev, &vmw_ldu_connector_builtin[i]);
if (!vmw_kms_validate_mode_vram(dev_priv, bmode->hdisplay * 2,
bmode->vdisplay))
continue;
mode = drm_mode_duplicate(dev, bmode);
if (!mode)
return 0;
mode->vrefresh = drm_mode_vrefresh(mode);