[Intel-gfx] [PATCH 1/5] drm/i915: Always pin the fence for scanout on gen2/3 and primary planes
Ville Syrjala
ville.syrjala at linux.intel.com
Thu Nov 16 19:14:47 UTC 2017
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
The current code is trying to be lazy with fences on scanout buffers.
That looks broken for several reasons:
* gen2/3 always need a fence for tiled scanout
* the unpin doesn't know whether we pinned the fence or not so it
may unpin something we don't own
* FBC GTT tracking needs a fence (not sure we have proper fallback
for when there is no fence)
So to fix this always use a fence for gen2/3, and for primary planes on
other platforms (for FBC). For sprites and cursor we never need a fence
so don't even try to get one. Since we now know whether a fence was
pinned we can safely unpin it too.
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/i915_gem.c | 4 +--
drivers/gpu/drm/i915/intel_display.c | 55 ++++++++++++++++++++++++++++--------
drivers/gpu/drm/i915/intel_drv.h | 7 +++--
drivers/gpu/drm/i915/intel_fbdev.c | 17 +++++++++--
drivers/gpu/drm/i915/intel_overlay.c | 2 +-
6 files changed, 66 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2158a758a17d..8c6d0b7ac9a5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3783,7 +3783,7 @@ int __must_check
i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write);
struct i915_vma * __must_check
i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
- u32 alignment,
+ u32 alignment, bool needs_fence,
const struct i915_ggtt_view *view);
void i915_gem_object_unpin_from_display_plane(struct i915_vma *vma);
int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 61ba321e9970..af18168e48e3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3944,7 +3944,7 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
*/
struct i915_vma *
i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
- u32 alignment,
+ u32 alignment, bool needs_fence,
const struct i915_ggtt_view *view)
{
struct i915_vma *vma;
@@ -3997,7 +3997,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
* happy to scanout from anywhere within its global aperture.
*/
flags = 0;
- if (HAS_GMCH_DISPLAY(i915))
+ if (HAS_GMCH_DISPLAY(i915) || needs_fence)
flags = PIN_MAPPABLE;
vma = i915_gem_object_ggtt_pin(obj, view, 0, alignment, flags);
}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e6fcbc5abc75..0657e03e871a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2154,8 +2154,21 @@ static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
}
}
+static bool intel_plane_needs_fence(const struct intel_plane_state *plane_state)
+{
+ struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+ struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+ struct drm_i915_gem_object *obj = intel_fb_obj(plane_state->base.fb);
+
+ if (i915_gem_object_get_tiling(obj) == I915_TILING_NONE)
+ return false;
+
+ return INTEL_GEN(dev_priv) < 4 || plane->id == PLANE_PRIMARY;
+}
+
struct i915_vma *
-intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb, unsigned int rotation)
+intel_pin_and_fence_fb_obj(const struct drm_framebuffer *fb,
+ unsigned int rotation, bool needs_fence)
{
struct drm_device *dev = fb->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
@@ -2189,11 +2202,16 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb, unsigned int rotation)
atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
- vma = i915_gem_object_pin_to_display_plane(obj, alignment, &view);
+ vma = i915_gem_object_pin_to_display_plane(obj, alignment,
+ needs_fence, &view);
if (IS_ERR(vma))
goto err;
- if (i915_vma_is_map_and_fenceable(vma)) {
+ if (needs_fence) {
+ int ret;
+
+ WARN_ON(!i915_vma_is_map_and_fenceable(vma));
+
/* Install a fence for tiled scan-out. Pre-i965 always needs a
* fence, whereas 965+ only requires a fence if using
* framebuffer compression. For simplicity, we always, when
@@ -2210,7 +2228,11 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb, unsigned int rotation)
* something and try to run the system in a "less than optimal"
* mode that matches the user configuration.
*/
- i915_vma_pin_fence(vma);
+ ret = i915_vma_pin_fence(vma);
+ if (ret) {
+ vma = ERR_PTR(ret);
+ goto err;
+ }
}
i915_vma_get(vma);
@@ -2221,11 +2243,12 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb, unsigned int rotation)
return vma;
}
-void intel_unpin_fb_vma(struct i915_vma *vma)
+void intel_unpin_fb_vma(struct i915_vma *vma, bool needs_fence)
{
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
- i915_vma_unpin_fence(vma);
+ if (needs_fence)
+ i915_vma_unpin_fence(vma);
i915_gem_object_unpin_from_display_plane(vma);
i915_vma_put(vma);
}
@@ -2816,6 +2839,7 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
struct intel_plane_state *intel_state =
to_intel_plane_state(plane_state);
struct drm_framebuffer *fb;
+ bool needs_fence;
if (!plane_config->fb)
return;
@@ -2869,8 +2893,10 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
valid_fb:
mutex_lock(&dev->struct_mutex);
+ needs_fence = intel_plane_needs_fence(intel_state);
intel_state->vma =
- intel_pin_and_fence_fb_obj(fb, primary->state->rotation);
+ intel_pin_and_fence_fb_obj(fb, primary->state->rotation,
+ needs_fence);
mutex_unlock(&dev->struct_mutex);
if (IS_ERR(intel_state->vma)) {
DRM_ERROR("failed to pin boot fb on pipe %d: %li\n",
@@ -12753,9 +12779,12 @@ intel_prepare_plane_fb(struct drm_plane *plane,
ret = i915_gem_object_attach_phys(obj, align);
} else {
+ bool needs_fence =
+ intel_plane_needs_fence(to_intel_plane_state(new_state));
struct i915_vma *vma;
- vma = intel_pin_and_fence_fb_obj(fb, new_state->rotation);
+ vma = intel_pin_and_fence_fb_obj(fb, new_state->rotation,
+ needs_fence);
if (!IS_ERR(vma))
to_intel_plane_state(new_state)->vma = vma;
else
@@ -12809,8 +12838,11 @@ intel_cleanup_plane_fb(struct drm_plane *plane,
/* Should only be called after a successful intel_prepare_plane_fb()! */
vma = fetch_and_zero(&to_intel_plane_state(old_state)->vma);
if (vma) {
+ bool needs_fence =
+ intel_plane_needs_fence(to_intel_plane_state(old_state));
+
mutex_lock(&plane->dev->struct_mutex);
- intel_unpin_fb_vma(vma);
+ intel_unpin_fb_vma(vma, needs_fence);
mutex_unlock(&plane->dev->struct_mutex);
}
}
@@ -13152,7 +13184,8 @@ intel_legacy_cursor_update(struct drm_plane *plane,
goto out_unlock;
}
} else {
- vma = intel_pin_and_fence_fb_obj(fb, new_plane_state->rotation);
+ vma = intel_pin_and_fence_fb_obj(fb, new_plane_state->rotation,
+ false);
if (IS_ERR(vma)) {
DRM_DEBUG_KMS("failed to pin object\n");
@@ -13183,7 +13216,7 @@ intel_legacy_cursor_update(struct drm_plane *plane,
old_vma = fetch_and_zero(&to_intel_plane_state(old_plane_state)->vma);
if (old_vma)
- intel_unpin_fb_vma(old_vma);
+ intel_unpin_fb_vma(old_vma, false);
out_unlock:
mutex_unlock(&dev_priv->drm.struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index e9b66e0cb647..c13f15ef342b 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -905,7 +905,7 @@ struct cxsr_latency {
#define to_intel_framebuffer(x) container_of(x, struct intel_framebuffer, base)
#define to_intel_plane(x) container_of(x, struct intel_plane, base)
#define to_intel_plane_state(x) container_of(x, struct intel_plane_state, base)
-#define intel_fb_obj(x) (x ? to_intel_framebuffer(x)->obj : NULL)
+#define intel_fb_obj(x) ((x) ? to_intel_framebuffer(x)->obj : NULL)
struct intel_hdmi {
i915_reg_t hdmi_reg;
@@ -1423,8 +1423,9 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
struct intel_load_detect_pipe *old,
struct drm_modeset_acquire_ctx *ctx);
struct i915_vma *
-intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb, unsigned int rotation);
-void intel_unpin_fb_vma(struct i915_vma *vma);
+intel_pin_and_fence_fb_obj(const struct drm_framebuffer *fb,
+ unsigned int rotation, bool needs_fence);
+void intel_unpin_fb_vma(struct i915_vma *vma, bool needs_fence);
struct drm_framebuffer *
intel_framebuffer_create(struct drm_i915_gem_object *obj,
struct drm_mode_fb_cmd2 *mode_cmd);
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index b8af35187d22..4cbc7fde5e30 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -165,6 +165,13 @@ static int intelfb_alloc(struct drm_fb_helper *helper,
return ret;
}
+static bool intel_fbdev_needs_fence(struct intel_fbdev *ifbdev)
+{
+ struct drm_i915_gem_object *obj = ifbdev->fb->obj;
+
+ return i915_gem_object_get_tiling(obj) != I915_TILING_NONE;
+}
+
static int intelfb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
@@ -180,6 +187,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
struct i915_vma *vma;
bool prealloc = false;
void __iomem *vaddr;
+ bool needs_fence;
int ret;
if (intel_fb &&
@@ -212,7 +220,9 @@ static int intelfb_create(struct drm_fb_helper *helper,
* This also validates that any existing fb inherited from the
* BIOS is suitable for own access.
*/
- vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_MODE_ROTATE_0);
+ needs_fence = intel_fbdev_needs_fence(ifbdev);
+ vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base,
+ DRM_MODE_ROTATE_0, needs_fence);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
goto out_unlock;
@@ -276,7 +286,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
return 0;
out_unpin:
- intel_unpin_fb_vma(vma);
+ intel_unpin_fb_vma(vma, needs_fence);
out_unlock:
intel_runtime_pm_put(dev_priv);
mutex_unlock(&dev->struct_mutex);
@@ -514,7 +524,8 @@ static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
if (ifbdev->vma) {
mutex_lock(&ifbdev->helper.dev->struct_mutex);
- intel_unpin_fb_vma(ifbdev->vma);
+ intel_unpin_fb_vma(ifbdev->vma,
+ intel_fbdev_needs_fence(ifbdev));
mutex_unlock(&ifbdev->helper.dev->struct_mutex);
}
diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 1b397b41cb4f..2b54526fbf3c 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -801,7 +801,7 @@ static int intel_overlay_do_put_image(struct intel_overlay *overlay,
atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
- vma = i915_gem_object_pin_to_display_plane(new_bo, 0, NULL);
+ vma = i915_gem_object_pin_to_display_plane(new_bo, 0, false, NULL);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
goto out_pin_section;
--
2.13.6
More information about the Intel-gfx
mailing list