mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 12:29:44 +07:00
856ee92e86
-----BEGIN PGP SIGNATURE----- iQEcBAABAgAGBQJY881cAAoJEHm+PkMAQRiGG4UH+wa2z6Qet36Uc4nXFZuSMYrO ErUWs1QpTDDv4a+LE4fgyMvM3j9XqtpfQLy1n70jfD14IqPBhHe4gytasAf+8lg1 YvddFx0Yl3sygVu3dDBNigWeVDbfwepW59coN0vI5nrMo+wrei8aVIWcFKOxdMuO n72u9vuhrkEnLJuQk7SF+t4OQob9McXE3s7QgyRopmlKhKo7mh8On7K2BRI5uluL t0j5kZM0a43EUT5rq9xR8f5pgtyfTMG/FO2MuzZn43MJcZcyfmnOP/cTSIvAKA5U 1i12lxlokYhURNUe+S6jm8A47TrqSRSJxaQJZRlfGJksZ0LJa8eUaLDCviBQEoE= =6QWZ -----END PGP SIGNATURE----- Merge tag 'v4.11-rc7' into drm-next Backmerge Linux 4.11-rc7 from Linus tree, to fix some conflicts that were causing problems with the rerere cache in drm-tip.
488 lines
14 KiB
C
488 lines
14 KiB
C
/*
|
|
* Copyright © 2008-2015 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/oom.h>
|
|
#include <linux/shmem_fs.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/dma-buf.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <drm/drmP.h>
|
|
#include <drm/i915_drm.h>
|
|
|
|
#include "i915_drv.h"
|
|
#include "i915_trace.h"
|
|
|
|
static bool shrinker_lock(struct drm_i915_private *dev_priv, bool *unlock)
|
|
{
|
|
switch (mutex_trylock_recursive(&dev_priv->drm.struct_mutex)) {
|
|
case MUTEX_TRYLOCK_FAILED:
|
|
return false;
|
|
|
|
case MUTEX_TRYLOCK_SUCCESS:
|
|
*unlock = true;
|
|
return true;
|
|
|
|
case MUTEX_TRYLOCK_RECURSIVE:
|
|
*unlock = false;
|
|
return true;
|
|
}
|
|
|
|
BUG();
|
|
}
|
|
|
|
static void shrinker_unlock(struct drm_i915_private *dev_priv, bool unlock)
|
|
{
|
|
if (!unlock)
|
|
return;
|
|
|
|
mutex_unlock(&dev_priv->drm.struct_mutex);
|
|
|
|
/* expedite the RCU grace period to free some request slabs */
|
|
synchronize_rcu_expedited();
|
|
}
|
|
|
|
static bool any_vma_pinned(struct drm_i915_gem_object *obj)
|
|
{
|
|
struct i915_vma *vma;
|
|
|
|
list_for_each_entry(vma, &obj->vma_list, obj_link)
|
|
if (i915_vma_is_pinned(vma))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool swap_available(void)
|
|
{
|
|
return get_nr_swap_pages() > 0;
|
|
}
|
|
|
|
static bool can_release_pages(struct drm_i915_gem_object *obj)
|
|
{
|
|
if (!obj->mm.pages)
|
|
return false;
|
|
|
|
/* Consider only shrinkable ojects. */
|
|
if (!i915_gem_object_is_shrinkable(obj))
|
|
return false;
|
|
|
|
/* Only report true if by unbinding the object and putting its pages
|
|
* we can actually make forward progress towards freeing physical
|
|
* pages.
|
|
*
|
|
* If the pages are pinned for any other reason than being bound
|
|
* to the GPU, simply unbinding from the GPU is not going to succeed
|
|
* in releasing our pin count on the pages themselves.
|
|
*/
|
|
if (atomic_read(&obj->mm.pages_pin_count) > obj->bind_count)
|
|
return false;
|
|
|
|
if (any_vma_pinned(obj))
|
|
return false;
|
|
|
|
/* We can only return physical pages to the system if we can either
|
|
* discard the contents (because the user has marked them as being
|
|
* purgeable) or if we can move their contents out to swap.
|
|
*/
|
|
return swap_available() || obj->mm.madv == I915_MADV_DONTNEED;
|
|
}
|
|
|
|
static bool unsafe_drop_pages(struct drm_i915_gem_object *obj)
|
|
{
|
|
if (i915_gem_object_unbind(obj) == 0)
|
|
__i915_gem_object_put_pages(obj, I915_MM_SHRINKER);
|
|
return !READ_ONCE(obj->mm.pages);
|
|
}
|
|
|
|
/**
|
|
* i915_gem_shrink - Shrink buffer object caches
|
|
* @dev_priv: i915 device
|
|
* @target: amount of memory to make available, in pages
|
|
* @flags: control flags for selecting cache types
|
|
*
|
|
* This function is the main interface to the shrinker. It will try to release
|
|
* up to @target pages of main memory backing storage from buffer objects.
|
|
* Selection of the specific caches can be done with @flags. This is e.g. useful
|
|
* when purgeable objects should be removed from caches preferentially.
|
|
*
|
|
* Note that it's not guaranteed that released amount is actually available as
|
|
* free system memory - the pages might still be in-used to due to other reasons
|
|
* (like cpu mmaps) or the mm core has reused them before we could grab them.
|
|
* Therefore code that needs to explicitly shrink buffer objects caches (e.g. to
|
|
* avoid deadlocks in memory reclaim) must fall back to i915_gem_shrink_all().
|
|
*
|
|
* Also note that any kind of pinning (both per-vma address space pins and
|
|
* backing storage pins at the buffer object level) result in the shrinker code
|
|
* having to skip the object.
|
|
*
|
|
* Returns:
|
|
* The number of pages of backing storage actually released.
|
|
*/
|
|
unsigned long
|
|
i915_gem_shrink(struct drm_i915_private *dev_priv,
|
|
unsigned long target, unsigned flags)
|
|
{
|
|
const struct {
|
|
struct list_head *list;
|
|
unsigned int bit;
|
|
} phases[] = {
|
|
{ &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND },
|
|
{ &dev_priv->mm.bound_list, I915_SHRINK_BOUND },
|
|
{ NULL, 0 },
|
|
}, *phase;
|
|
unsigned long count = 0;
|
|
bool unlock;
|
|
|
|
if (!shrinker_lock(dev_priv, &unlock))
|
|
return 0;
|
|
|
|
trace_i915_gem_shrink(dev_priv, target, flags);
|
|
i915_gem_retire_requests(dev_priv);
|
|
|
|
/*
|
|
* Unbinding of objects will require HW access; Let us not wake the
|
|
* device just to recover a little memory. If absolutely necessary,
|
|
* we will force the wake during oom-notifier.
|
|
*/
|
|
if ((flags & I915_SHRINK_BOUND) &&
|
|
!intel_runtime_pm_get_if_in_use(dev_priv))
|
|
flags &= ~I915_SHRINK_BOUND;
|
|
|
|
/*
|
|
* As we may completely rewrite the (un)bound list whilst unbinding
|
|
* (due to retiring requests) we have to strictly process only
|
|
* one element of the list at the time, and recheck the list
|
|
* on every iteration.
|
|
*
|
|
* In particular, we must hold a reference whilst removing the
|
|
* object as we may end up waiting for and/or retiring the objects.
|
|
* This might release the final reference (held by the active list)
|
|
* and result in the object being freed from under us. This is
|
|
* similar to the precautions the eviction code must take whilst
|
|
* removing objects.
|
|
*
|
|
* Also note that although these lists do not hold a reference to
|
|
* the object we can safely grab one here: The final object
|
|
* unreferencing and the bound_list are both protected by the
|
|
* dev->struct_mutex and so we won't ever be able to observe an
|
|
* object on the bound_list with a reference count equals 0.
|
|
*/
|
|
for (phase = phases; phase->list; phase++) {
|
|
struct list_head still_in_list;
|
|
struct drm_i915_gem_object *obj;
|
|
|
|
if ((flags & phase->bit) == 0)
|
|
continue;
|
|
|
|
INIT_LIST_HEAD(&still_in_list);
|
|
while (count < target &&
|
|
(obj = list_first_entry_or_null(phase->list,
|
|
typeof(*obj),
|
|
global_link))) {
|
|
list_move_tail(&obj->global_link, &still_in_list);
|
|
if (!obj->mm.pages) {
|
|
list_del_init(&obj->global_link);
|
|
continue;
|
|
}
|
|
|
|
if (flags & I915_SHRINK_PURGEABLE &&
|
|
obj->mm.madv != I915_MADV_DONTNEED)
|
|
continue;
|
|
|
|
if (flags & I915_SHRINK_VMAPS &&
|
|
!is_vmalloc_addr(obj->mm.mapping))
|
|
continue;
|
|
|
|
if (!(flags & I915_SHRINK_ACTIVE) &&
|
|
(i915_gem_object_is_active(obj) ||
|
|
i915_gem_object_is_framebuffer(obj)))
|
|
continue;
|
|
|
|
if (!can_release_pages(obj))
|
|
continue;
|
|
|
|
if (unsafe_drop_pages(obj)) {
|
|
/* May arrive from get_pages on another bo */
|
|
mutex_lock_nested(&obj->mm.lock,
|
|
I915_MM_SHRINKER);
|
|
if (!obj->mm.pages) {
|
|
__i915_gem_object_invalidate(obj);
|
|
list_del_init(&obj->global_link);
|
|
count += obj->base.size >> PAGE_SHIFT;
|
|
}
|
|
mutex_unlock(&obj->mm.lock);
|
|
}
|
|
}
|
|
list_splice_tail(&still_in_list, phase->list);
|
|
}
|
|
|
|
if (flags & I915_SHRINK_BOUND)
|
|
intel_runtime_pm_put(dev_priv);
|
|
|
|
i915_gem_retire_requests(dev_priv);
|
|
|
|
shrinker_unlock(dev_priv, unlock);
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* i915_gem_shrink_all - Shrink buffer object caches completely
|
|
* @dev_priv: i915 device
|
|
*
|
|
* This is a simple wraper around i915_gem_shrink() to aggressively shrink all
|
|
* caches completely. It also first waits for and retires all outstanding
|
|
* requests to also be able to release backing storage for active objects.
|
|
*
|
|
* This should only be used in code to intentionally quiescent the gpu or as a
|
|
* last-ditch effort when memory seems to have run out.
|
|
*
|
|
* Returns:
|
|
* The number of pages of backing storage actually released.
|
|
*/
|
|
unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv)
|
|
{
|
|
unsigned long freed;
|
|
|
|
intel_runtime_pm_get(dev_priv);
|
|
freed = i915_gem_shrink(dev_priv, -1UL,
|
|
I915_SHRINK_BOUND |
|
|
I915_SHRINK_UNBOUND |
|
|
I915_SHRINK_ACTIVE);
|
|
intel_runtime_pm_put(dev_priv);
|
|
|
|
synchronize_rcu(); /* wait for our earlier RCU delayed slab frees */
|
|
|
|
return freed;
|
|
}
|
|
|
|
static unsigned long
|
|
i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc)
|
|
{
|
|
struct drm_i915_private *dev_priv =
|
|
container_of(shrinker, struct drm_i915_private, mm.shrinker);
|
|
struct drm_i915_gem_object *obj;
|
|
unsigned long count;
|
|
bool unlock;
|
|
|
|
if (!shrinker_lock(dev_priv, &unlock))
|
|
return 0;
|
|
|
|
i915_gem_retire_requests(dev_priv);
|
|
|
|
count = 0;
|
|
list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link)
|
|
if (can_release_pages(obj))
|
|
count += obj->base.size >> PAGE_SHIFT;
|
|
|
|
list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) {
|
|
if (!i915_gem_object_is_active(obj) && can_release_pages(obj))
|
|
count += obj->base.size >> PAGE_SHIFT;
|
|
}
|
|
|
|
shrinker_unlock(dev_priv, unlock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static unsigned long
|
|
i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
|
|
{
|
|
struct drm_i915_private *dev_priv =
|
|
container_of(shrinker, struct drm_i915_private, mm.shrinker);
|
|
unsigned long freed;
|
|
bool unlock;
|
|
|
|
if (!shrinker_lock(dev_priv, &unlock))
|
|
return SHRINK_STOP;
|
|
|
|
freed = i915_gem_shrink(dev_priv,
|
|
sc->nr_to_scan,
|
|
I915_SHRINK_BOUND |
|
|
I915_SHRINK_UNBOUND |
|
|
I915_SHRINK_PURGEABLE);
|
|
if (freed < sc->nr_to_scan)
|
|
freed += i915_gem_shrink(dev_priv,
|
|
sc->nr_to_scan - freed,
|
|
I915_SHRINK_BOUND |
|
|
I915_SHRINK_UNBOUND);
|
|
|
|
shrinker_unlock(dev_priv, unlock);
|
|
|
|
return freed;
|
|
}
|
|
|
|
static bool
|
|
shrinker_lock_uninterruptible(struct drm_i915_private *dev_priv, bool *unlock,
|
|
int timeout_ms)
|
|
{
|
|
unsigned long timeout = jiffies + msecs_to_jiffies_timeout(timeout_ms);
|
|
|
|
do {
|
|
if (i915_gem_wait_for_idle(dev_priv, 0) == 0 &&
|
|
shrinker_lock(dev_priv, unlock))
|
|
break;
|
|
|
|
schedule_timeout_killable(1);
|
|
if (fatal_signal_pending(current))
|
|
return false;
|
|
|
|
if (time_after(jiffies, timeout)) {
|
|
pr_err("Unable to lock GPU to purge memory.\n");
|
|
return false;
|
|
}
|
|
} while (1);
|
|
|
|
return true;
|
|
}
|
|
|
|
static int
|
|
i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr)
|
|
{
|
|
struct drm_i915_private *dev_priv =
|
|
container_of(nb, struct drm_i915_private, mm.oom_notifier);
|
|
struct drm_i915_gem_object *obj;
|
|
unsigned long unevictable, bound, unbound, freed_pages;
|
|
bool unlock;
|
|
|
|
if (!shrinker_lock_uninterruptible(dev_priv, &unlock, 5000))
|
|
return NOTIFY_DONE;
|
|
|
|
freed_pages = i915_gem_shrink_all(dev_priv);
|
|
|
|
/* Because we may be allocating inside our own driver, we cannot
|
|
* assert that there are no objects with pinned pages that are not
|
|
* being pointed to by hardware.
|
|
*/
|
|
unbound = bound = unevictable = 0;
|
|
list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) {
|
|
if (!obj->mm.pages)
|
|
continue;
|
|
|
|
if (!can_release_pages(obj))
|
|
unevictable += obj->base.size >> PAGE_SHIFT;
|
|
else
|
|
unbound += obj->base.size >> PAGE_SHIFT;
|
|
}
|
|
list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) {
|
|
if (!obj->mm.pages)
|
|
continue;
|
|
|
|
if (!can_release_pages(obj))
|
|
unevictable += obj->base.size >> PAGE_SHIFT;
|
|
else
|
|
bound += obj->base.size >> PAGE_SHIFT;
|
|
}
|
|
|
|
shrinker_unlock(dev_priv, unlock);
|
|
|
|
if (freed_pages || unbound || bound)
|
|
pr_info("Purging GPU memory, %lu pages freed, "
|
|
"%lu pages still pinned.\n",
|
|
freed_pages, unevictable);
|
|
if (unbound || bound)
|
|
pr_err("%lu and %lu pages still available in the "
|
|
"bound and unbound GPU page lists.\n",
|
|
bound, unbound);
|
|
|
|
*(unsigned long *)ptr += freed_pages;
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int
|
|
i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr)
|
|
{
|
|
struct drm_i915_private *dev_priv =
|
|
container_of(nb, struct drm_i915_private, mm.vmap_notifier);
|
|
struct i915_vma *vma, *next;
|
|
unsigned long freed_pages = 0;
|
|
bool unlock;
|
|
int ret;
|
|
|
|
if (!shrinker_lock_uninterruptible(dev_priv, &unlock, 5000))
|
|
return NOTIFY_DONE;
|
|
|
|
/* Force everything onto the inactive lists */
|
|
ret = i915_gem_wait_for_idle(dev_priv, I915_WAIT_LOCKED);
|
|
if (ret)
|
|
goto out;
|
|
|
|
intel_runtime_pm_get(dev_priv);
|
|
freed_pages += i915_gem_shrink(dev_priv, -1UL,
|
|
I915_SHRINK_BOUND |
|
|
I915_SHRINK_UNBOUND |
|
|
I915_SHRINK_ACTIVE |
|
|
I915_SHRINK_VMAPS);
|
|
intel_runtime_pm_put(dev_priv);
|
|
|
|
/* We also want to clear any cached iomaps as they wrap vmap */
|
|
list_for_each_entry_safe(vma, next,
|
|
&dev_priv->ggtt.base.inactive_list, vm_link) {
|
|
unsigned long count = vma->node.size >> PAGE_SHIFT;
|
|
if (vma->iomap && i915_vma_unbind(vma) == 0)
|
|
freed_pages += count;
|
|
}
|
|
|
|
out:
|
|
shrinker_unlock(dev_priv, unlock);
|
|
|
|
*(unsigned long *)ptr += freed_pages;
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
/**
|
|
* i915_gem_shrinker_init - Initialize i915 shrinker
|
|
* @dev_priv: i915 device
|
|
*
|
|
* This function registers and sets up the i915 shrinker and OOM handler.
|
|
*/
|
|
void i915_gem_shrinker_init(struct drm_i915_private *dev_priv)
|
|
{
|
|
dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan;
|
|
dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count;
|
|
dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS;
|
|
WARN_ON(register_shrinker(&dev_priv->mm.shrinker));
|
|
|
|
dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom;
|
|
WARN_ON(register_oom_notifier(&dev_priv->mm.oom_notifier));
|
|
|
|
dev_priv->mm.vmap_notifier.notifier_call = i915_gem_shrinker_vmap;
|
|
WARN_ON(register_vmap_purge_notifier(&dev_priv->mm.vmap_notifier));
|
|
}
|
|
|
|
/**
|
|
* i915_gem_shrinker_cleanup - Clean up i915 shrinker
|
|
* @dev_priv: i915 device
|
|
*
|
|
* This function unregisters the i915 shrinker and OOM handler.
|
|
*/
|
|
void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv)
|
|
{
|
|
WARN_ON(unregister_vmap_purge_notifier(&dev_priv->mm.vmap_notifier));
|
|
WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
|
|
unregister_shrinker(&dev_priv->mm.shrinker);
|
|
}
|