The eviction code is the gnarly underbelly of memory management, and is
clearer if kept separated from the normal domain management in GEM.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_drv.h | 6 +
drivers/gpu/drm/i915/i915_gem.c | 234 +-----------------------------
drivers/gpu/drm/i915/i915_gem_evict.c | 263 +++++++++++++++++++++++++++++++++
4 files changed, 272 insertions(+), 232 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_gem_evict.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index da78f2c..384fd45 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -8,6 +8,7 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o i915_mem.o \
i915_suspend.o \
i915_gem.o \
i915_gem_debug.o \
+ i915_gem_evict.o \
i915_gem_tiling.o \
i915_trace_points.o \
intel_display.o \
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 65cf336..b6a0bd0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -964,6 +964,7 @@ int i915_gem_init_ringbuffer(struct drm_device *dev);
void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
int i915_gem_do_init(struct drm_device *dev, unsigned long start,
unsigned long end);
+int i915_gpu_idle(struct drm_device *dev);
int i915_gem_idle(struct drm_device *dev);
uint32_t i915_add_request(struct drm_device *dev,
struct drm_file *file_priv,
@@ -989,6 +990,11 @@ int i915_gem_object_flush_write_domain(struct
drm_gem_object *obj);
void i915_gem_shrinker_init(void);
void i915_gem_shrinker_exit(void);
+/* i915_gem_evict.c */
+int i915_gem_evict_something(struct drm_device *dev, int min_size, unsigned
alignment);
+int i915_gem_evict_everything(struct drm_device *dev);
+int i915_gem_evict_inactive(struct drm_device *dev);
+
/* i915_gem_tiling.c */
void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
void i915_gem_object_do_bit_17_swizzle(struct drm_gem_object *obj);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 1b867c4..bb7d6a9 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -49,9 +49,6 @@ static int i915_gem_object_wait_rendering(struct
drm_gem_object *obj);
static int i915_gem_object_bind_to_gtt(struct drm_gem_object *obj,
unsigned alignment);
static void i915_gem_clear_fence_reg(struct drm_gem_object *obj);
-static int i915_gem_evict_something(struct drm_device *dev, int min_size,
- unsigned alignment);
-static int i915_gem_evict_from_inactive_list(struct drm_device *dev);
static int i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object
*obj,
struct drm_i915_gem_pwrite *args,
struct drm_file *file_priv);
@@ -1869,19 +1866,6 @@ i915_gem_flush(struct drm_device *dev,
flush_domains);
}
-static void
-i915_gem_flush_ring(struct drm_device *dev,
- uint32_t invalidate_domains,
- uint32_t flush_domains,
- struct intel_ring_buffer *ring)
-{
- if (flush_domains & I915_GEM_DOMAIN_CPU)
- drm_agp_chipset_flush(dev);
- ring->flush(dev, ring,
- invalidate_domains,
- flush_domains);
-}
-
/**
* Ensures that all rendering to the object has completed and the object is
* safe to unbind from the GTT or access from the CPU.
@@ -1991,53 +1975,7 @@ i915_gem_object_unbind(struct drm_gem_object *obj)
return 0;
}
-static int
-i915_gem_scan_inactive_list_and_evict(struct drm_device *dev, int min_size,
- unsigned alignment, int *found)
-{
- drm_i915_private_t *dev_priv = dev->dev_private;
- struct drm_gem_object *obj;
- struct drm_i915_gem_object *obj_priv;
- struct drm_gem_object *best = NULL;
- struct drm_gem_object *first = NULL;
-
- /* Try to find the smallest clean object */
- list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) {
- struct drm_gem_object *obj = &obj_priv->base;
- if (obj->size >= min_size) {
- if ((!obj_priv->dirty ||
- i915_gem_object_is_purgeable(obj_priv)) &&
- (!best || obj->size < best->size)) {
- best = obj;
- if (best->size == min_size)
- break;
- }
- if (!first)
- first = obj;
- }
- }
-
- obj = best ? best : first;
-
- if (!obj) {
- *found = 0;
- return 0;
- }
-
- *found = 1;
-
-#if WATCH_LRU
- DRM_INFO("%s: evicting %p\n", __func__, obj);
-#endif
- obj_priv = to_intel_bo(obj);
- BUG_ON(obj_priv->pin_count != 0);
- BUG_ON(obj_priv->active);
-
- /* Wait on the rendering and unbind the buffer. */
- return i915_gem_object_unbind(obj);
-}
-
-static int
+int
i915_gpu_idle(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
@@ -2078,150 +2016,6 @@ i915_gpu_idle(struct drm_device *dev)
return ret;
}
-static int
-i915_gem_evict_everything(struct drm_device *dev)
-{
- drm_i915_private_t *dev_priv = dev->dev_private;
- int ret;
- bool lists_empty;
-
- spin_lock(&dev_priv->mm.active_list_lock);
- lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
- list_empty(&dev_priv->mm.flushing_list) &&
- list_empty(&dev_priv->render_ring.active_list) &&
- (!HAS_BSD(dev)
- || list_empty(&dev_priv->bsd_ring.active_list)));
- spin_unlock(&dev_priv->mm.active_list_lock);
-
- if (lists_empty)
- return -ENOSPC;
-
- /* Flush everything (on to the inactive lists) and evict */
- ret = i915_gpu_idle(dev);
- if (ret)
- return ret;
-
- BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
-
- ret = i915_gem_evict_from_inactive_list(dev);
- if (ret)
- return ret;
-
- spin_lock(&dev_priv->mm.active_list_lock);
- lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
- list_empty(&dev_priv->mm.flushing_list) &&
- list_empty(&dev_priv->render_ring.active_list) &&
- (!HAS_BSD(dev)
- || list_empty(&dev_priv->bsd_ring.active_list)));
- spin_unlock(&dev_priv->mm.active_list_lock);
- BUG_ON(!lists_empty);
-
- return 0;
-}
-
-static int
-i915_gem_evict_something(struct drm_device *dev,
- int min_size, unsigned alignment)
-{
- drm_i915_private_t *dev_priv = dev->dev_private;
- int ret, found;
-
- struct intel_ring_buffer *render_ring = &dev_priv->render_ring;
- struct intel_ring_buffer *bsd_ring = &dev_priv->bsd_ring;
- for (;;) {
- i915_gem_retire_requests(dev, render_ring);
-
- if (HAS_BSD(dev))
- i915_gem_retire_requests(dev, bsd_ring);
-
- /* If there's an inactive buffer available now, grab it
- * and be done.
- */
- ret = i915_gem_scan_inactive_list_and_evict(dev, min_size,
- alignment,
- &found);
- if (found)
- return ret;
-
- /* If we didn't get anything, but the ring is still processing
- * things, wait for the next to finish and hopefully leave us
- * a buffer to evict.
- */
- if (!list_empty(&render_ring->request_list)) {
- struct drm_i915_gem_request *request;
-
- request = list_first_entry(&render_ring->request_list,
- struct drm_i915_gem_request,
- list);
-
- ret = i915_wait_request(dev,
- request->seqno, request->ring);
- if (ret)
- return ret;
-
- continue;
- }
-
- if (HAS_BSD(dev) && !list_empty(&bsd_ring->request_list)) {
- struct drm_i915_gem_request *request;
-
- request = list_first_entry(&bsd_ring->request_list,
- struct drm_i915_gem_request,
- list);
-
- ret = i915_wait_request(dev,
- request->seqno, request->ring);
- if (ret)
- return ret;
-
- continue;
- }
-
- /* If we didn't have anything on the request list but there
- * are buffers awaiting a flush, emit one and try again.
- * When we wait on it, those buffers waiting for that flush
- * will get moved to inactive.
- */
- if (!list_empty(&dev_priv->mm.flushing_list)) {
- struct drm_gem_object *obj = NULL;
- struct drm_i915_gem_object *obj_priv;
-
- /* Find an object that we can immediately reuse */
- list_for_each_entry(obj_priv,
&dev_priv->mm.flushing_list, list) {
- obj = &obj_priv->base;
- if (obj->size >= min_size)
- break;
-
- obj = NULL;
- }
-
- if (obj != NULL) {
- uint32_t seqno;
-
- i915_gem_flush_ring(dev,
- obj->write_domain,
- obj->write_domain,
- obj_priv->ring);
- seqno = i915_add_request(dev, NULL,
- obj->write_domain,
- obj_priv->ring);
- if (seqno == 0)
- return -ENOMEM;
- continue;
- }
- }
-
- /* If we didn't do any of the above, there's no single buffer
- * large enough to swap out for the new one, so just evict
- * everything and start again. (This should be rare.)
- */
- if (!list_empty (&dev_priv->mm.inactive_list))
- return i915_gem_evict_from_inactive_list(dev);
- else
- return i915_gem_evict_everything(dev);
- }
-}
-
int
i915_gem_object_get_pages(struct drm_gem_object *obj,
gfp_t gfpmask)
@@ -4535,30 +4329,6 @@ void i915_gem_free_object(struct drm_gem_object *obj)
kfree(obj_priv);
}
-/** Unbinds all inactive objects. */
-static int
-i915_gem_evict_from_inactive_list(struct drm_device *dev)
-{
- drm_i915_private_t *dev_priv = dev->dev_private;
-
- while (!list_empty(&dev_priv->mm.inactive_list)) {
- struct drm_gem_object *obj;
- int ret;
-
- obj = &list_first_entry(&dev_priv->mm.inactive_list,
- struct drm_i915_gem_object,
- list)->base;
-
- ret = i915_gem_object_unbind(obj);
- if (ret != 0) {
- DRM_ERROR("Error unbinding object: %d\n", ret);
- return ret;
- }
- }
-
- return 0;
-}
-
int
i915_gem_idle(struct drm_device *dev)
{
@@ -4583,7 +4353,7 @@ i915_gem_idle(struct drm_device *dev)
/* Under UMS, be paranoid and evict. */
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
- ret = i915_gem_evict_from_inactive_list(dev);
+ ret = i915_gem_evict_inactive(dev);
if (ret) {
mutex_unlock(&dev->struct_mutex);
return ret;
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c
b/drivers/gpu/drm/i915/i915_gem_evict.c
new file mode 100644
index 0000000..bf4d199
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright © 2008-2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Eric Anholt <e...@anholt.net>
+ * Chris Wilson <ch...@chris-wilson.co.uuk>
+ *
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "i915_drv.h"
+#include "i915_drm.h"
+
+static inline int
+i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj_priv)
+{
+ return obj_priv->madv == I915_MADV_DONTNEED;
+}
+
+static int
+i915_gem_scan_inactive_list_and_evict(struct drm_device *dev, int min_size,
+ unsigned alignment, int *found)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ struct drm_gem_object *obj;
+ struct drm_i915_gem_object *obj_priv;
+ struct drm_gem_object *best = NULL;
+ struct drm_gem_object *first = NULL;
+
+ /* Try to find the smallest clean object */
+ list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) {
+ struct drm_gem_object *obj = &obj_priv->base;
+ if (obj->size >= min_size) {
+ if ((!obj_priv->dirty ||
+ i915_gem_object_is_purgeable(obj_priv)) &&
+ (!best || obj->size < best->size)) {
+ best = obj;
+ if (best->size == min_size)
+ break;
+ }
+ if (!first)
+ first = obj;
+ }
+ }
+
+ obj = best ? best : first;
+
+ if (!obj) {
+ *found = 0;
+ return 0;
+ }
+
+ *found = 1;
+
+#if WATCH_LRU
+ DRM_INFO("%s: evicting %p\n", __func__, obj);
+#endif
+ obj_priv = to_intel_bo(obj);
+ BUG_ON(obj_priv->pin_count != 0);
+ BUG_ON(obj_priv->active);
+
+ /* Wait on the rendering and unbind the buffer. */
+ return i915_gem_object_unbind(obj);
+}
+
+static void
+i915_gem_flush_ring(struct drm_device *dev,
+ uint32_t invalidate_domains,
+ uint32_t flush_domains,
+ struct intel_ring_buffer *ring)
+{
+ if (flush_domains & I915_GEM_DOMAIN_CPU)
+ drm_agp_chipset_flush(dev);
+ ring->flush(dev, ring,
+ invalidate_domains,
+ flush_domains);
+}
+
+int
+i915_gem_evict_something(struct drm_device *dev,
+ int min_size, unsigned alignment)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ int ret, found;
+
+ struct intel_ring_buffer *render_ring = &dev_priv->render_ring;
+ struct intel_ring_buffer *bsd_ring = &dev_priv->bsd_ring;
+ for (;;) {
+ i915_gem_retire_requests(dev, render_ring);
+
+ if (HAS_BSD(dev))
+ i915_gem_retire_requests(dev, bsd_ring);
+
+ /* If there's an inactive buffer available now, grab it
+ * and be done.
+ */
+ ret = i915_gem_scan_inactive_list_and_evict(dev, min_size,
+ alignment,
+ &found);
+ if (found)
+ return ret;
+
+ /* If we didn't get anything, but the ring is still processing
+ * things, wait for the next to finish and hopefully leave us
+ * a buffer to evict.
+ */
+ if (!list_empty(&render_ring->request_list)) {
+ struct drm_i915_gem_request *request;
+
+ request = list_first_entry(&render_ring->request_list,
+ struct drm_i915_gem_request,
+ list);
+
+ ret = i915_do_wait_request(dev, request->seqno, true,
request->ring);
+ if (ret)
+ return ret;
+
+ continue;
+ }
+
+ if (HAS_BSD(dev) && !list_empty(&bsd_ring->request_list)) {
+ struct drm_i915_gem_request *request;
+
+ request = list_first_entry(&bsd_ring->request_list,
+ struct drm_i915_gem_request,
+ list);
+
+ ret = i915_do_wait_request(dev, request->seqno, true,
request->ring);
+ if (ret)
+ return ret;
+
+ continue;
+ }
+
+ /* If we didn't have anything on the request list but there
+ * are buffers awaiting a flush, emit one and try again.
+ * When we wait on it, those buffers waiting for that flush
+ * will get moved to inactive.
+ */
+ if (!list_empty(&dev_priv->mm.flushing_list)) {
+ struct drm_gem_object *obj = NULL;
+ struct drm_i915_gem_object *obj_priv;
+
+ /* Find an object that we can immediately reuse */
+ list_for_each_entry(obj_priv,
&dev_priv->mm.flushing_list, list) {
+ obj = &obj_priv->base;
+ if (obj->size >= min_size)
+ break;
+
+ obj = NULL;
+ }
+
+ if (obj != NULL) {
+ uint32_t seqno;
+
+ i915_gem_flush_ring(dev,
+ obj->write_domain,
+ obj->write_domain,
+ obj_priv->ring);
+ seqno = i915_add_request(dev, NULL,
+ obj->write_domain,
+ obj_priv->ring);
+ if (seqno == 0)
+ return -ENOMEM;
+ continue;
+ }
+ }
+
+ /* If we didn't do any of the above, there's no single buffer
+ * large enough to swap out for the new one, so just evict
+ * everything and start again. (This should be rare.)
+ */
+ if (!list_empty(&dev_priv->mm.inactive_list))
+ return i915_gem_evict_inactive(dev);
+ else
+ return i915_gem_evict_everything(dev);
+ }
+}
+
+int
+i915_gem_evict_everything(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ int ret;
+ bool lists_empty;
+
+ spin_lock(&dev_priv->mm.active_list_lock);
+ lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
+ list_empty(&dev_priv->mm.flushing_list) &&
+ list_empty(&dev_priv->render_ring.active_list) &&
+ (!HAS_BSD(dev)
+ || list_empty(&dev_priv->bsd_ring.active_list)));
+ spin_unlock(&dev_priv->mm.active_list_lock);
+
+ if (lists_empty)
+ return -ENOSPC;
+
+ /* Flush everything (on to the inactive lists) and evict */
+ ret = i915_gpu_idle(dev);
+ if (ret)
+ return ret;
+
+ BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
+
+ ret = i915_gem_evict_inactive(dev);
+ if (ret)
+ return ret;
+
+ spin_lock(&dev_priv->mm.active_list_lock);
+ lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
+ list_empty(&dev_priv->mm.flushing_list) &&
+ list_empty(&dev_priv->render_ring.active_list) &&
+ (!HAS_BSD(dev)
+ || list_empty(&dev_priv->bsd_ring.active_list)));
+ spin_unlock(&dev_priv->mm.active_list_lock);
+ BUG_ON(!lists_empty);
+
+ return 0;
+}
+
+/** Unbinds all inactive objects. */
+int
+i915_gem_evict_inactive(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+
+ while (!list_empty(&dev_priv->mm.inactive_list)) {
+ struct drm_gem_object *obj;
+ int ret;
+
+ obj = &list_first_entry(&dev_priv->mm.inactive_list,
+ struct drm_i915_gem_object,
+ list)->base;
+
+ ret = i915_gem_object_unbind(obj);
+ if (ret != 0) {
+ DRM_ERROR("Error unbinding object: %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
--
1.7.1
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