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path: root/drivers/gpu/drm/i915/i915_gem_tiling.c
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_tiling.c')
-rw-r--r--drivers/gpu/drm/i915/i915_gem_tiling.c347
1 files changed, 217 insertions, 130 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index c85e7b06bdba..974ac08df473 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -34,8 +34,8 @@
/**
* DOC: buffer object tiling
*
- * i915_gem_set_tiling() and i915_gem_get_tiling() is the userspace interface to
- * declare fence register requirements.
+ * i915_gem_set_tiling_ioctl() and i915_gem_get_tiling_ioctl() is the userspace
+ * interface to declare fence register requirements.
*
* In principle GEM doesn't care at all about the internal data layout of an
* object, and hence it also doesn't care about tiling or swizzling. There's two
@@ -58,86 +58,147 @@
* invovlement.
*/
+/**
+ * i915_gem_fence_size - required global GTT size for a fence
+ * @i915: i915 device
+ * @size: object size
+ * @tiling: tiling mode
+ * @stride: tiling stride
+ *
+ * Return the required global GTT size for a fence (view of a tiled object),
+ * taking into account potential fence register mapping.
+ */
+u32 i915_gem_fence_size(struct drm_i915_private *i915,
+ u32 size, unsigned int tiling, unsigned int stride)
+{
+ u32 ggtt_size;
+
+ GEM_BUG_ON(!size);
+
+ if (tiling == I915_TILING_NONE)
+ return size;
+
+ GEM_BUG_ON(!stride);
+
+ if (INTEL_GEN(i915) >= 4) {
+ stride *= i915_gem_tile_height(tiling);
+ GEM_BUG_ON(!IS_ALIGNED(stride, I965_FENCE_PAGE));
+ return roundup(size, stride);
+ }
+
+ /* Previous chips need a power-of-two fence region when tiling */
+ if (IS_GEN3(i915))
+ ggtt_size = 1024*1024;
+ else
+ ggtt_size = 512*1024;
+
+ while (ggtt_size < size)
+ ggtt_size <<= 1;
+
+ return ggtt_size;
+}
+
+/**
+ * i915_gem_fence_alignment - required global GTT alignment for a fence
+ * @i915: i915 device
+ * @size: object size
+ * @tiling: tiling mode
+ * @stride: tiling stride
+ *
+ * Return the required global GTT alignment for a fence (a view of a tiled
+ * object), taking into account potential fence register mapping.
+ */
+u32 i915_gem_fence_alignment(struct drm_i915_private *i915, u32 size,
+ unsigned int tiling, unsigned int stride)
+{
+ GEM_BUG_ON(!size);
+
+ /*
+ * Minimum alignment is 4k (GTT page size), but might be greater
+ * if a fence register is needed for the object.
+ */
+ if (tiling == I915_TILING_NONE)
+ return I915_GTT_MIN_ALIGNMENT;
+
+ if (INTEL_GEN(i915) >= 4)
+ return I965_FENCE_PAGE;
+
+ /*
+ * Previous chips need to be aligned to the size of the smallest
+ * fence register that can contain the object.
+ */
+ return i915_gem_fence_size(i915, size, tiling, stride);
+}
+
/* Check pitch constriants for all chips & tiling formats */
static bool
-i915_tiling_ok(struct drm_i915_private *dev_priv,
- int stride, int size, int tiling_mode)
+i915_tiling_ok(struct drm_i915_gem_object *obj,
+ unsigned int tiling, unsigned int stride)
{
- int tile_width;
+ struct drm_i915_private *i915 = to_i915(obj->base.dev);
+ unsigned int tile_width;
/* Linear is always fine */
- if (tiling_mode == I915_TILING_NONE)
+ if (tiling == I915_TILING_NONE)
return true;
- if (tiling_mode > I915_TILING_LAST)
+ if (tiling > I915_TILING_LAST)
return false;
- if (IS_GEN2(dev_priv) ||
- (tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev_priv)))
- tile_width = 128;
- else
- tile_width = 512;
-
/* check maximum stride & object size */
/* i965+ stores the end address of the gtt mapping in the fence
* reg, so dont bother to check the size */
- if (INTEL_GEN(dev_priv) >= 7) {
+ if (INTEL_GEN(i915) >= 7) {
if (stride / 128 > GEN7_FENCE_MAX_PITCH_VAL)
return false;
- } else if (INTEL_GEN(dev_priv) >= 4) {
+ } else if (INTEL_GEN(i915) >= 4) {
if (stride / 128 > I965_FENCE_MAX_PITCH_VAL)
return false;
} else {
if (stride > 8192)
return false;
- if (IS_GEN3(dev_priv)) {
- if (size > I830_FENCE_MAX_SIZE_VAL << 20)
+ if (IS_GEN3(i915)) {
+ if (obj->base.size > I830_FENCE_MAX_SIZE_VAL << 20)
return false;
} else {
- if (size > I830_FENCE_MAX_SIZE_VAL << 19)
+ if (obj->base.size > I830_FENCE_MAX_SIZE_VAL << 19)
return false;
}
}
- if (stride < tile_width)
+ if (IS_GEN2(i915) ||
+ (tiling == I915_TILING_Y && HAS_128_BYTE_Y_TILING(i915)))
+ tile_width = 128;
+ else
+ tile_width = 512;
+
+ if (!stride || !IS_ALIGNED(stride, tile_width))
return false;
/* 965+ just needs multiples of tile width */
- if (INTEL_GEN(dev_priv) >= 4) {
- if (stride & (tile_width - 1))
- return false;
+ if (INTEL_GEN(i915) >= 4)
return true;
- }
/* Pre-965 needs power of two tile widths */
- if (stride & (stride - 1))
- return false;
-
- return true;
+ return is_power_of_2(stride);
}
-static bool i915_vma_fence_prepare(struct i915_vma *vma, int tiling_mode)
+static bool i915_vma_fence_prepare(struct i915_vma *vma,
+ int tiling_mode, unsigned int stride)
{
- struct drm_i915_private *dev_priv = to_i915(vma->vm->dev);
- u32 size;
+ struct drm_i915_private *i915 = vma->vm->i915;
+ u32 size, alignment;
if (!i915_vma_is_map_and_fenceable(vma))
return true;
- if (INTEL_GEN(dev_priv) == 3) {
- if (vma->node.start & ~I915_FENCE_START_MASK)
- return false;
- } else {
- if (vma->node.start & ~I830_FENCE_START_MASK)
- return false;
- }
-
- size = i915_gem_get_ggtt_size(dev_priv, vma->size, tiling_mode);
+ size = i915_gem_fence_size(i915, vma->size, tiling_mode, stride);
if (vma->node.size < size)
return false;
- if (vma->node.start & (size - 1))
+ alignment = i915_gem_fence_alignment(i915, vma->size, tiling_mode, stride);
+ if (!IS_ALIGNED(vma->node.start, alignment))
return false;
return true;
@@ -145,20 +206,20 @@ static bool i915_vma_fence_prepare(struct i915_vma *vma, int tiling_mode)
/* Make the current GTT allocation valid for the change in tiling. */
static int
-i915_gem_object_fence_prepare(struct drm_i915_gem_object *obj, int tiling_mode)
+i915_gem_object_fence_prepare(struct drm_i915_gem_object *obj,
+ int tiling_mode, unsigned int stride)
{
- struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
struct i915_vma *vma;
int ret;
if (tiling_mode == I915_TILING_NONE)
return 0;
- if (INTEL_GEN(dev_priv) >= 4)
- return 0;
-
list_for_each_entry(vma, &obj->vma_list, obj_link) {
- if (i915_vma_fence_prepare(vma, tiling_mode))
+ if (!i915_vma_is_ggtt(vma))
+ break;
+
+ if (i915_vma_fence_prepare(vma, tiling_mode, stride))
continue;
ret = i915_vma_unbind(vma);
@@ -169,8 +230,100 @@ i915_gem_object_fence_prepare(struct drm_i915_gem_object *obj, int tiling_mode)
return 0;
}
+int
+i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
+ unsigned int tiling, unsigned int stride)
+{
+ struct drm_i915_private *i915 = to_i915(obj->base.dev);
+ struct i915_vma *vma;
+ int err;
+
+ /* Make sure we don't cross-contaminate obj->tiling_and_stride */
+ BUILD_BUG_ON(I915_TILING_LAST & STRIDE_MASK);
+
+ GEM_BUG_ON(!i915_tiling_ok(obj, tiling, stride));
+ GEM_BUG_ON(!stride ^ (tiling == I915_TILING_NONE));
+ lockdep_assert_held(&i915->drm.struct_mutex);
+
+ if ((tiling | stride) == obj->tiling_and_stride)
+ return 0;
+
+ if (obj->framebuffer_references)
+ return -EBUSY;
+
+ /* We need to rebind the object if its current allocation
+ * no longer meets the alignment restrictions for its new
+ * tiling mode. Otherwise we can just leave it alone, but
+ * need to ensure that any fence register is updated before
+ * the next fenced (either through the GTT or by the BLT unit
+ * on older GPUs) access.
+ *
+ * After updating the tiling parameters, we then flag whether
+ * we need to update an associated fence register. Note this
+ * has to also include the unfenced register the GPU uses
+ * whilst executing a fenced command for an untiled object.
+ */
+
+ err = i915_gem_object_fence_prepare(obj, tiling, stride);
+ if (err)
+ return err;
+
+ /* If the memory has unknown (i.e. varying) swizzling, we pin the
+ * pages to prevent them being swapped out and causing corruption
+ * due to the change in swizzling.
+ */
+ mutex_lock(&obj->mm.lock);
+ if (obj->mm.pages &&
+ obj->mm.madv == I915_MADV_WILLNEED &&
+ i915->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
+ if (tiling == I915_TILING_NONE) {
+ GEM_BUG_ON(!obj->mm.quirked);
+ __i915_gem_object_unpin_pages(obj);
+ obj->mm.quirked = false;
+ }
+ if (!i915_gem_object_is_tiled(obj)) {
+ GEM_BUG_ON(!obj->mm.quirked);
+ __i915_gem_object_pin_pages(obj);
+ obj->mm.quirked = true;
+ }
+ }
+ mutex_unlock(&obj->mm.lock);
+
+ list_for_each_entry(vma, &obj->vma_list, obj_link) {
+ if (!i915_vma_is_ggtt(vma))
+ break;
+
+ vma->fence_size =
+ i915_gem_fence_size(i915, vma->size, tiling, stride);
+ vma->fence_alignment =
+ i915_gem_fence_alignment(i915,
+ vma->size, tiling, stride);
+
+ if (vma->fence)
+ vma->fence->dirty = true;
+ }
+
+ obj->tiling_and_stride = tiling | stride;
+
+ /* Force the fence to be reacquired for GTT access */
+ i915_gem_release_mmap(obj);
+
+ /* Try to preallocate memory required to save swizzling on put-pages */
+ if (i915_gem_object_needs_bit17_swizzle(obj)) {
+ if (!obj->bit_17) {
+ obj->bit_17 = kcalloc(BITS_TO_LONGS(obj->base.size >> PAGE_SHIFT),
+ sizeof(long), GFP_KERNEL);
+ }
+ } else {
+ kfree(obj->bit_17);
+ obj->bit_17 = NULL;
+ }
+
+ return 0;
+}
+
/**
- * i915_gem_set_tiling - IOCTL handler to set tiling mode
+ * i915_gem_set_tiling_ioctl - IOCTL handler to set tiling mode
* @dev: DRM device
* @data: data pointer for the ioctl
* @file: DRM file for the ioctl call
@@ -184,30 +337,19 @@ i915_gem_object_fence_prepare(struct drm_i915_gem_object *obj, int tiling_mode)
* Zero on success, negative errno on failure.
*/
int
-i915_gem_set_tiling(struct drm_device *dev, void *data,
- struct drm_file *file)
+i915_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
{
struct drm_i915_gem_set_tiling *args = data;
- struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_i915_gem_object *obj;
- int err = 0;
-
- /* Make sure we don't cross-contaminate obj->tiling_and_stride */
- BUILD_BUG_ON(I915_TILING_LAST & STRIDE_MASK);
+ int err;
obj = i915_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
- if (!i915_tiling_ok(dev_priv,
- args->stride, obj->base.size, args->tiling_mode)) {
- i915_gem_object_put(obj);
- return -EINVAL;
- }
-
- mutex_lock(&dev->struct_mutex);
- if (obj->pin_display || obj->framebuffer_references) {
- err = -EBUSY;
+ if (!i915_tiling_ok(obj, args->tiling_mode, args->stride)) {
+ err = -EINVAL;
goto err;
}
@@ -216,9 +358,9 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
args->stride = 0;
} else {
if (args->tiling_mode == I915_TILING_X)
- args->swizzle_mode = dev_priv->mm.bit_6_swizzle_x;
+ args->swizzle_mode = to_i915(dev)->mm.bit_6_swizzle_x;
else
- args->swizzle_mode = dev_priv->mm.bit_6_swizzle_y;
+ args->swizzle_mode = to_i915(dev)->mm.bit_6_swizzle_y;
/* Hide bit 17 swizzling from the user. This prevents old Mesa
* from aborting the application on sw fallbacks to bit 17,
@@ -240,79 +382,24 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
}
}
- if (args->tiling_mode != i915_gem_object_get_tiling(obj) ||
- args->stride != i915_gem_object_get_stride(obj)) {
- /* We need to rebind the object if its current allocation
- * no longer meets the alignment restrictions for its new
- * tiling mode. Otherwise we can just leave it alone, but
- * need to ensure that any fence register is updated before
- * the next fenced (either through the GTT or by the BLT unit
- * on older GPUs) access.
- *
- * After updating the tiling parameters, we then flag whether
- * we need to update an associated fence register. Note this
- * has to also include the unfenced register the GPU uses
- * whilst executing a fenced command for an untiled object.
- */
+ err = mutex_lock_interruptible(&dev->struct_mutex);
+ if (err)
+ goto err;
- err = i915_gem_object_fence_prepare(obj, args->tiling_mode);
- if (!err) {
- struct i915_vma *vma;
-
- mutex_lock(&obj->mm.lock);
- if (obj->mm.pages &&
- obj->mm.madv == I915_MADV_WILLNEED &&
- dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
- if (args->tiling_mode == I915_TILING_NONE) {
- GEM_BUG_ON(!obj->mm.quirked);
- __i915_gem_object_unpin_pages(obj);
- obj->mm.quirked = false;
- }
- if (!i915_gem_object_is_tiled(obj)) {
- GEM_BUG_ON(!obj->mm.quirked);
- __i915_gem_object_pin_pages(obj);
- obj->mm.quirked = true;
- }
- }
- mutex_unlock(&obj->mm.lock);
-
- list_for_each_entry(vma, &obj->vma_list, obj_link) {
- if (!vma->fence)
- continue;
-
- vma->fence->dirty = true;
- }
- obj->tiling_and_stride =
- args->stride | args->tiling_mode;
-
- /* Force the fence to be reacquired for GTT access */
- i915_gem_release_mmap(obj);
- }
- }
- /* we have to maintain this existing ABI... */
+ err = i915_gem_object_set_tiling(obj, args->tiling_mode, args->stride);
+ mutex_unlock(&dev->struct_mutex);
+
+ /* We have to maintain this existing ABI... */
args->stride = i915_gem_object_get_stride(obj);
args->tiling_mode = i915_gem_object_get_tiling(obj);
- /* Try to preallocate memory required to save swizzling on put-pages */
- if (i915_gem_object_needs_bit17_swizzle(obj)) {
- if (obj->bit_17 == NULL) {
- obj->bit_17 = kcalloc(BITS_TO_LONGS(obj->base.size >> PAGE_SHIFT),
- sizeof(long), GFP_KERNEL);
- }
- } else {
- kfree(obj->bit_17);
- obj->bit_17 = NULL;
- }
-
err:
i915_gem_object_put(obj);
- mutex_unlock(&dev->struct_mutex);
-
return err;
}
/**
- * i915_gem_get_tiling - IOCTL handler to get tiling mode
+ * i915_gem_get_tiling_ioctl - IOCTL handler to get tiling mode
* @dev: DRM device
* @data: data pointer for the ioctl
* @file: DRM file for the ioctl call
@@ -325,8 +412,8 @@ err:
* Zero on success, negative errno on failure.
*/
int
-i915_gem_get_tiling(struct drm_device *dev, void *data,
- struct drm_file *file)
+i915_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
{
struct drm_i915_gem_get_tiling *args = data;
struct drm_i915_private *dev_priv = to_i915(dev);