[Intel-gfx] [PATCH] [v2] drm/i915: Require HW contexts (when possible)
Ben Widawsky
benjamin.widawsky at intel.com
Thu Oct 17 23:49:54 CEST 2013
v2: Fixed the botched locking on init_hw failure in i915_reset (Ville)
Call cleanup_ringbuffer on failed context create in init_hw (Ville)
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
drivers/gpu/drm/i915/i915_drv.c | 3 ---
drivers/gpu/drm/i915/i915_drv.h | 3 +--
drivers/gpu/drm/i915/i915_gem.c | 8 +++++-
drivers/gpu/drm/i915/i915_gem_context.c | 43 +++++++++++++++------------------
drivers/gpu/drm/i915/i915_sysfs.c | 6 ++---
5 files changed, 31 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 1060a96..839925b 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -750,12 +750,9 @@ int i915_reset(struct drm_device *dev)
*/
if (drm_core_check_feature(dev, DRIVER_MODESET) ||
!dev_priv->ums.mm_suspended) {
- bool hw_contexts_disabled = dev_priv->hw_contexts_disabled;
dev_priv->ums.mm_suspended = 0;
ret = i915_gem_init_hw(dev);
- if (!hw_contexts_disabled && dev_priv->hw_contexts_disabled)
- DRM_ERROR("HW contexts didn't survive reset\n");
mutex_unlock(&dev->struct_mutex);
if (ret) {
DRM_ERROR("Failed hw init on reset %d\n", ret);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e4ff8e9..21b2c37 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1411,7 +1411,6 @@ typedef struct drm_i915_private {
struct drm_property *broadcast_rgb_property;
struct drm_property *force_audio_property;
- bool hw_contexts_disabled;
uint32_t hw_context_size;
struct list_head context_list;
@@ -2140,7 +2139,7 @@ i915_gem_obj_ggtt_pin(struct drm_i915_gem_object *obj,
}
/* i915_gem_context.c */
-void i915_gem_context_init(struct drm_device *dev);
+int __must_check i915_gem_context_init(struct drm_device *dev);
void i915_gem_context_fini(struct drm_device *dev);
void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
int i915_switch_context(struct intel_ring_buffer *ring,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 34df59b..f8e9d40 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4463,7 +4463,13 @@ i915_gem_init_hw(struct drm_device *dev)
* XXX: There was some w/a described somewhere suggesting loading
* contexts before PPGTT.
*/
- i915_gem_context_init(dev);
+ ret = i915_gem_context_init(dev);
+ if (ret) {
+ i915_gem_cleanup_ringbuffer();
+ DRM_ERROR("Context initialization failed %d\n", ret);
+ return ret;
+ }
+
if (dev_priv->mm.aliasing_ppgtt) {
ret = dev_priv->mm.aliasing_ppgtt->enable(dev);
if (ret) {
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index cc619c1..4625670 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -244,36 +244,34 @@ err_destroy:
return ret;
}
-void i915_gem_context_init(struct drm_device *dev)
+int i915_gem_context_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ int ret;
- if (!HAS_HW_CONTEXTS(dev)) {
- dev_priv->hw_contexts_disabled = true;
- DRM_DEBUG_DRIVER("Disabling HW Contexts; old hardware\n");
- return;
- }
+ if (!HAS_HW_CONTEXTS(dev))
+ return 0;
/* If called from reset, or thaw... we've been here already */
- if (dev_priv->hw_contexts_disabled ||
- dev_priv->ring[RCS].default_context)
- return;
+ if (dev_priv->ring[RCS].default_context)
+ return 0;
dev_priv->hw_context_size = round_up(get_context_size(dev), 4096);
if (dev_priv->hw_context_size > (1<<20)) {
- dev_priv->hw_contexts_disabled = true;
DRM_DEBUG_DRIVER("Disabling HW Contexts; invalid size\n");
- return;
+ return -E2BIG;
}
- if (create_default_context(dev_priv)) {
- dev_priv->hw_contexts_disabled = true;
- DRM_DEBUG_DRIVER("Disabling HW Contexts; create failed\n");
- return;
+ ret = create_default_context(dev_priv);
+ if (ret) {
+ DRM_DEBUG_DRIVER("Disabling HW Contexts; create failed %d\n",
+ ret);
+ return ret;
}
DRM_DEBUG_DRIVER("HW context support initialized\n");
+ return 0;
}
void i915_gem_context_fini(struct drm_device *dev)
@@ -281,7 +279,7 @@ void i915_gem_context_fini(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_hw_context *dctx = dev_priv->ring[RCS].default_context;
- if (dev_priv->hw_contexts_disabled)
+ if (!HAS_HW_CONTEXTS(dev))
return;
/* The only known way to stop the gpu from accessing the hw context is
@@ -324,16 +322,16 @@ i915_gem_context_get_hang_stats(struct drm_device *dev,
struct drm_file *file,
u32 id)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_hw_context *ctx;
if (id == DEFAULT_CONTEXT_ID)
return &file_priv->hang_stats;
- ctx = NULL;
- if (!dev_priv->hw_contexts_disabled)
- ctx = i915_gem_context_get(file->driver_priv, id);
+ if (!HAS_HW_CONTEXTS(dev))
+ return ERR_PTR(-ENOENT);
+
+ ctx = i915_gem_context_get(file->driver_priv, id);
if (ctx == NULL)
return ERR_PTR(-ENOENT);
@@ -506,7 +504,7 @@ int i915_switch_context(struct intel_ring_buffer *ring,
struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct i915_hw_context *to;
- if (dev_priv->hw_contexts_disabled)
+ if (!HAS_HW_CONTEXTS(ring->dev))
return 0;
WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
@@ -531,7 +529,6 @@ int i915_switch_context(struct intel_ring_buffer *ring,
int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_context_create *args = data;
struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_hw_context *ctx;
@@ -540,7 +537,7 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
if (!(dev->driver->driver_features & DRIVER_GEM))
return -ENODEV;
- if (dev_priv->hw_contexts_disabled)
+ if (!HAS_HW_CONTEXTS(dev))
return -ENODEV;
ret = i915_mutex_lock_interruptible(dev);
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index bb31ff3..47bc51b 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -183,13 +183,13 @@ i915_l3_write(struct file *filp, struct kobject *kobj,
int slice = (int)(uintptr_t)attr->private;
int ret;
+ if (!HAS_HW_CONTEXTS(drm_dev))
+ return -ENXIO;
+
ret = l3_access_valid(drm_dev, offset);
if (ret)
return ret;
- if (dev_priv->hw_contexts_disabled)
- return -ENXIO;
-
ret = i915_mutex_lock_interruptible(drm_dev);
if (ret)
return ret;
--
1.8.4.1
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