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Merge branch 'vmwgfx-fixes-4.16' of git://people.freedesktop.org/~thomash/linux into drm-fixes

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Two vmwgfx fixes for 4.16. Both cc'd stable.

* 'vmwgfx-fixes-4.16' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Fix a destoy-while-held mutex problem.
  drm/vmwgfx: Fix black screen and device errors when running without fbdev
This commit is contained in:
Dave Airlie 2018-03-23 06:15:08 +10:00
commit 096c49ecba
6 changed files with 59 additions and 17 deletions
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13
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -1337,6 +1337,19 @@ static void __vmw_svga_disable(struct vmw_private *dev_priv)
*/
void vmw_svga_disable(struct vmw_private *dev_priv)
{
/*
* Disabling SVGA will turn off device modesetting capabilities, so
* notify KMS about that so that it doesn't cache atomic state that
* isn't valid anymore, for example crtcs turned on.
* Strictly we'd want to do this under the SVGA lock (or an SVGA mutex),
* but vmw_kms_lost_device() takes the reservation sem and thus we'll
* end up with lock order reversal. Thus, a master may actually perform
* a new modeset just after we call vmw_kms_lost_device() and race with
* vmw_svga_disable(), but that should at worst cause atomic KMS state
* to be inconsistent with the device, causing modesetting problems.
*
*/
vmw_kms_lost_device(dev_priv->dev);
ttm_write_lock(&dev_priv->reservation_sem, false);
spin_lock(&dev_priv->svga_lock);
if (dev_priv->bdev.man[TTM_PL_VRAM].use_type) {

1
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -938,6 +938,7 @@ int vmw_kms_present(struct vmw_private *dev_priv,
int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
void vmw_kms_legacy_hotspot_clear(struct vmw_private *dev_priv);
void vmw_kms_lost_device(struct drm_device *dev);
int vmw_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,

39
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
View File

@ -31,7 +31,6 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_rect.h>
/* Might need a hrtimer here? */
#define VMWGFX_PRESENT_RATE ((HZ / 60 > 0) ? HZ / 60 : 1)
@ -2517,9 +2516,12 @@ void vmw_kms_helper_buffer_finish(struct vmw_private *dev_priv,
* Helper to be used if an error forces the caller to undo the actions of
* vmw_kms_helper_resource_prepare.
*/
void vmw_kms_helper_resource_revert(struct vmw_resource *res)
void vmw_kms_helper_resource_revert(struct vmw_validation_ctx *ctx)
{
vmw_kms_helper_buffer_revert(res->backup);
struct vmw_resource *res = ctx->res;
vmw_kms_helper_buffer_revert(ctx->buf);
vmw_dmabuf_unreference(&ctx->buf);
vmw_resource_unreserve(res, false, NULL, 0);
mutex_unlock(&res->dev_priv->cmdbuf_mutex);
}
@ -2536,10 +2538,14 @@ void vmw_kms_helper_resource_revert(struct vmw_resource *res)
* interrupted by a signal.
*/
int vmw_kms_helper_resource_prepare(struct vmw_resource *res,
bool interruptible)
bool interruptible,
struct vmw_validation_ctx *ctx)
{
int ret = 0;
ctx->buf = NULL;
ctx->res = res;
if (interruptible)
ret = mutex_lock_interruptible(&res->dev_priv->cmdbuf_mutex);
else
@ -2558,6 +2564,8 @@ int vmw_kms_helper_resource_prepare(struct vmw_resource *res,
res->dev_priv->has_mob);
if (ret)
goto out_unreserve;
ctx->buf = vmw_dmabuf_reference(res->backup);
}
ret = vmw_resource_validate(res);
if (ret)
@ -2565,7 +2573,7 @@ int vmw_kms_helper_resource_prepare(struct vmw_resource *res,
return 0;
out_revert:
vmw_kms_helper_buffer_revert(res->backup);
vmw_kms_helper_buffer_revert(ctx->buf);
out_unreserve:
vmw_resource_unreserve(res, false, NULL, 0);
out_unlock:
@ -2581,11 +2589,13 @@ int vmw_kms_helper_resource_prepare(struct vmw_resource *res,
* @out_fence: Optional pointer to a fence pointer. If non-NULL, a
* ref-counted fence pointer is returned here.
*/
void vmw_kms_helper_resource_finish(struct vmw_resource *res,
struct vmw_fence_obj **out_fence)
void vmw_kms_helper_resource_finish(struct vmw_validation_ctx *ctx,
struct vmw_fence_obj **out_fence)
{
if (res->backup || out_fence)
vmw_kms_helper_buffer_finish(res->dev_priv, NULL, res->backup,
struct vmw_resource *res = ctx->res;
if (ctx->buf || out_fence)
vmw_kms_helper_buffer_finish(res->dev_priv, NULL, ctx->buf,
out_fence, NULL);
vmw_resource_unreserve(res, false, NULL, 0);
@ -2851,3 +2861,14 @@ int vmw_kms_set_config(struct drm_mode_set *set,
return drm_atomic_helper_set_config(set, ctx);
}
/**
* vmw_kms_lost_device - Notify kms that modesetting capabilities will be lost
*
* @dev: Pointer to the drm device
*/
void vmw_kms_lost_device(struct drm_device *dev)
{
drm_atomic_helper_shutdown(dev);
}

13
drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
View File

@ -240,6 +240,11 @@ struct vmw_display_unit {
int set_gui_y;
};
struct vmw_validation_ctx {
struct vmw_resource *res;
struct vmw_dma_buffer *buf;
};
#define vmw_crtc_to_du(x) \
container_of(x, struct vmw_display_unit, crtc)
#define vmw_connector_to_du(x) \
@ -296,9 +301,10 @@ void vmw_kms_helper_buffer_finish(struct vmw_private *dev_priv,
struct drm_vmw_fence_rep __user *
user_fence_rep);
int vmw_kms_helper_resource_prepare(struct vmw_resource *res,
bool interruptible);
void vmw_kms_helper_resource_revert(struct vmw_resource *res);
void vmw_kms_helper_resource_finish(struct vmw_resource *res,
bool interruptible,
struct vmw_validation_ctx *ctx);
void vmw_kms_helper_resource_revert(struct vmw_validation_ctx *ctx);
void vmw_kms_helper_resource_finish(struct vmw_validation_ctx *ctx,
struct vmw_fence_obj **out_fence);
int vmw_kms_readback(struct vmw_private *dev_priv,
struct drm_file *file_priv,
@ -439,5 +445,4 @@ int vmw_kms_stdu_dma(struct vmw_private *dev_priv,
int vmw_kms_set_config(struct drm_mode_set *set,
struct drm_modeset_acquire_ctx *ctx);
#endif

5
drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
View File

@ -909,12 +909,13 @@ int vmw_kms_sou_do_surface_dirty(struct vmw_private *dev_priv,
struct vmw_framebuffer_surface *vfbs =
container_of(framebuffer, typeof(*vfbs), base);
struct vmw_kms_sou_surface_dirty sdirty;
struct vmw_validation_ctx ctx;
int ret;
if (!srf)
srf = &vfbs->surface->res;
ret = vmw_kms_helper_resource_prepare(srf, true);
ret = vmw_kms_helper_resource_prepare(srf, true, &ctx);
if (ret)
return ret;
@ -933,7 +934,7 @@ int vmw_kms_sou_do_surface_dirty(struct vmw_private *dev_priv,
ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
dest_x, dest_y, num_clips, inc,
&sdirty.base);
vmw_kms_helper_resource_finish(srf, out_fence);
vmw_kms_helper_resource_finish(&ctx, out_fence);
return ret;
}

5
drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
View File

@ -980,12 +980,13 @@ int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
struct vmw_framebuffer_surface *vfbs =
container_of(framebuffer, typeof(*vfbs), base);
struct vmw_stdu_dirty sdirty;
struct vmw_validation_ctx ctx;
int ret;
if (!srf)
srf = &vfbs->surface->res;
ret = vmw_kms_helper_resource_prepare(srf, true);
ret = vmw_kms_helper_resource_prepare(srf, true, &ctx);
if (ret)
return ret;
@ -1008,7 +1009,7 @@ int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
dest_x, dest_y, num_clips, inc,
&sdirty.base);
out_finish:
vmw_kms_helper_resource_finish(srf, out_fence);
vmw_kms_helper_resource_finish(&ctx, out_fence);
return ret;
}