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drm/i915: Provide an i915_active.acquire callback

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If we introduce a callback for i915_active that is only called the first
time we use the i915_active and is symmetrically paired with the
i915_active.retire callback, we can replace the open-coded and
non-atomic implementations -- which will be very fragile (i.e. broken)
upon removing the struct_mutex serialisation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190621183801.23252-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-06-21 19:38:00 +01:00
parent a93615f900
commit 12c255b5da
13 changed files with 274 additions and 208 deletions
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8
drivers/gpu/drm/i915/gem/i915_gem_context.c
View File

@ -923,8 +923,12 @@ static int context_barrier_task(struct i915_gem_context *ctx,
if (!cb)
return -ENOMEM;
i915_active_init(i915, &cb->base, cb_retire);
i915_active_acquire(&cb->base);
i915_active_init(i915, &cb->base, NULL, cb_retire);
err = i915_active_acquire(&cb->base);
if (err) {
kfree(cb);
return err;
}
for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
struct i915_request *rq;

97
drivers/gpu/drm/i915/gt/intel_context.c
View File

@ -95,11 +95,15 @@ void intel_context_unpin(struct intel_context *ce)
intel_context_put(ce);
}
static int __context_pin_state(struct i915_vma *vma, unsigned long flags)
static int __context_pin_state(struct i915_vma *vma)
{
u64 flags;
int err;
err = i915_vma_pin(vma, 0, 0, flags | PIN_GLOBAL);
flags = i915_ggtt_pin_bias(vma) | PIN_OFFSET_BIAS;
flags |= PIN_HIGH | PIN_GLOBAL;
err = i915_vma_pin(vma, 0, 0, flags);
if (err)
return err;
@ -119,7 +123,7 @@ static void __context_unpin_state(struct i915_vma *vma)
__i915_vma_unpin(vma);
}
static void intel_context_retire(struct i915_active *active)
static void __intel_context_retire(struct i915_active *active)
{
struct intel_context *ce = container_of(active, typeof(*ce), active);
@ -130,6 +134,43 @@ static void intel_context_retire(struct i915_active *active)
intel_context_put(ce);
}
static int __intel_context_active(struct i915_active *active)
{
struct intel_context *ce = container_of(active, typeof(*ce), active);
int err;
intel_context_get(ce);
err = intel_ring_pin(ce->ring);
if (err)
goto err_put;
if (!ce->state)
return 0;
err = __context_pin_state(ce->state);
if (err)
goto err_ring;
/* Preallocate tracking nodes */
if (!i915_gem_context_is_kernel(ce->gem_context)) {
err = i915_active_acquire_preallocate_barrier(&ce->active,
ce->engine);
if (err)
goto err_state;
}
return 0;
err_state:
__context_unpin_state(ce->state);
err_ring:
intel_ring_unpin(ce->ring);
err_put:
intel_context_put(ce);
return err;
}
void
intel_context_init(struct intel_context *ce,
struct i915_gem_context *ctx,
@ -149,54 +190,8 @@ intel_context_init(struct intel_context *ce,
mutex_init(&ce->pin_mutex);
i915_active_init(ctx->i915, &ce->active, intel_context_retire);
}
int intel_context_active_acquire(struct intel_context *ce, unsigned long flags)
{
int err;
if (!i915_active_acquire(&ce->active))
return 0;
intel_context_get(ce);
err = intel_ring_pin(ce->ring);
if (err)
goto err_put;
if (!ce->state)
return 0;
err = __context_pin_state(ce->state, flags);
if (err)
goto err_ring;
/* Preallocate tracking nodes */
if (!i915_gem_context_is_kernel(ce->gem_context)) {
err = i915_active_acquire_preallocate_barrier(&ce->active,
ce->engine);
if (err)
goto err_state;
}
return 0;
err_state:
__context_unpin_state(ce->state);
err_ring:
intel_ring_unpin(ce->ring);
err_put:
intel_context_put(ce);
i915_active_cancel(&ce->active);
return err;
}
void intel_context_active_release(struct intel_context *ce)
{
/* Nodes preallocated in intel_context_active() */
i915_active_acquire_barrier(&ce->active);
i915_active_release(&ce->active);
i915_active_init(ctx->i915, &ce->active,
__intel_context_active, __intel_context_retire);
}
static void i915_global_context_shrink(void)

14
drivers/gpu/drm/i915/gt/intel_context.h
View File

@ -9,6 +9,7 @@
#include <linux/lockdep.h>
#include "i915_active.h"
#include "intel_context_types.h"
#include "intel_engine_types.h"
@ -102,8 +103,17 @@ static inline void intel_context_exit(struct intel_context *ce)
ce->ops->exit(ce);
}
int intel_context_active_acquire(struct intel_context *ce, unsigned long flags);
void intel_context_active_release(struct intel_context *ce);
static inline int intel_context_active_acquire(struct intel_context *ce)
{
return i915_active_acquire(&ce->active);
}
static inline void intel_context_active_release(struct intel_context *ce)
{
/* Nodes preallocated in intel_context_active() */
i915_active_acquire_barrier(&ce->active);
i915_active_release(&ce->active);
}
static inline struct intel_context *intel_context_get(struct intel_context *ce)
{

6
drivers/gpu/drm/i915/gt/intel_lrc.c
View File

@ -1542,12 +1542,10 @@ __execlists_context_pin(struct intel_context *ce,
goto err;
GEM_BUG_ON(!ce->state);
ret = intel_context_active_acquire(ce,
engine->i915->ggtt.pin_bias |
PIN_OFFSET_BIAS |
PIN_HIGH);
ret = intel_context_active_acquire(ce);
if (ret)
goto err;
GEM_BUG_ON(!i915_vma_is_pinned(ce->state));
vaddr = i915_gem_object_pin_map(ce->state->obj,
i915_coherent_map_type(engine->i915) |

2
drivers/gpu/drm/i915/gt/intel_ringbuffer.c
View File

@ -1455,7 +1455,7 @@ static int ring_context_pin(struct intel_context *ce)
ce->state = vma;
}
err = intel_context_active_acquire(ce, PIN_HIGH);
err = intel_context_active_acquire(ce);
if (err)
return err;

16
drivers/gpu/drm/i915/gt/intel_timeline.c
View File

@ -146,6 +146,15 @@ static void __cacheline_retire(struct i915_active *active)
__idle_cacheline_free(cl);
}
static int __cacheline_active(struct i915_active *active)
{
struct intel_timeline_cacheline *cl =
container_of(active, typeof(*cl), active);
__i915_vma_pin(cl->hwsp->vma);
return 0;
}
static struct intel_timeline_cacheline *
cacheline_alloc(struct intel_timeline_hwsp *hwsp, unsigned int cacheline)
{
@ -168,15 +177,16 @@ cacheline_alloc(struct intel_timeline_hwsp *hwsp, unsigned int cacheline)
cl->hwsp = hwsp;
cl->vaddr = page_pack_bits(vaddr, cacheline);
i915_active_init(hwsp->gt->i915, &cl->active, __cacheline_retire);
i915_active_init(hwsp->gt->i915, &cl->active,
__cacheline_active, __cacheline_retire);
return cl;
}
static void cacheline_acquire(struct intel_timeline_cacheline *cl)
{
if (cl && i915_active_acquire(&cl->active))
__i915_vma_pin(cl->hwsp->vma);
if (cl)
i915_active_acquire(&cl->active);
}
static void cacheline_release(struct intel_timeline_cacheline *cl)

2
drivers/gpu/drm/i915/gt/mock_engine.c
View File

@ -155,7 +155,7 @@ static int mock_context_pin(struct intel_context *ce)
return -ENOMEM;
}
ret = intel_context_active_acquire(ce, PIN_HIGH);
ret = intel_context_active_acquire(ce);
if (ret)
return ret;

225
drivers/gpu/drm/i915/i915_active.c
View File

@ -39,7 +39,7 @@ static void *active_debug_hint(void *addr)
{
struct i915_active *ref = addr;
return (void *)ref->retire ?: (void *)ref;
return (void *)ref->active ?: (void *)ref->retire ?: (void *)ref;
}
static struct debug_obj_descr active_debug_desc = {
@ -83,50 +83,58 @@ static inline void debug_active_assert(struct i915_active *ref) { }
#endif
static void
__active_park(struct i915_active *ref)
__active_retire(struct i915_active *ref)
{
struct active_node *it, *n;
struct rb_root root;
bool retire = false;
rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) {
lockdep_assert_held(&ref->mutex);
/* return the unused nodes to our slabcache -- flushing the allocator */
if (atomic_dec_and_test(&ref->count)) {
debug_active_deactivate(ref);
root = ref->tree;
ref->tree = RB_ROOT;
ref->cache = NULL;
retire = true;
}
mutex_unlock(&ref->mutex);
if (!retire)
return;
ref->retire(ref);
rbtree_postorder_for_each_entry_safe(it, n, &root, node) {
GEM_BUG_ON(i915_active_request_isset(&it->base));
kmem_cache_free(global.slab_cache, it);
}
ref->tree = RB_ROOT;
}
static void
__active_retire(struct i915_active *ref)
active_retire(struct i915_active *ref)
{
GEM_BUG_ON(!ref->count);
if (--ref->count)
GEM_BUG_ON(!atomic_read(&ref->count));
if (atomic_add_unless(&ref->count, -1, 1))
return;
debug_active_deactivate(ref);
/* return the unused nodes to our slabcache */
__active_park(ref);
ref->retire(ref);
/* One active may be flushed from inside the acquire of another */
mutex_lock_nested(&ref->mutex, SINGLE_DEPTH_NESTING);
__active_retire(ref);
}
static void
node_retire(struct i915_active_request *base, struct i915_request *rq)
{
__active_retire(container_of(base, struct active_node, base)->ref);
}
static void
last_retire(struct i915_active_request *base, struct i915_request *rq)
{
__active_retire(container_of(base, struct i915_active, last));
active_retire(container_of(base, struct active_node, base)->ref);
}
static struct i915_active_request *
active_instance(struct i915_active *ref, u64 idx)
{
struct active_node *node;
struct active_node *node, *prealloc;
struct rb_node **p, *parent;
struct i915_request *old;
/*
* We track the most recently used timeline to skip a rbtree search
@ -134,20 +142,18 @@ active_instance(struct i915_active *ref, u64 idx)
* at all. We can reuse the last slot if it is empty, that is
* after the previous activity has been retired, or if it matches the
* current timeline.
*
* Note that we allow the timeline to be active simultaneously in
* the rbtree and the last cache. We do this to avoid having
* to search and replace the rbtree element for a new timeline, with
* the cost being that we must be aware that the ref may be retired
* twice for the same timeline (as the older rbtree element will be
* retired before the new request added to last).
*/
old = i915_active_request_raw(&ref->last, BKL(ref));
if (!old || old->fence.context == idx)
goto out;
node = READ_ONCE(ref->cache);
if (node && node->timeline == idx)
return &node->base;
/* Move the currently active fence into the rbtree */
idx = old->fence.context;
/* Preallocate a replacement, just in case */
prealloc = kmem_cache_alloc(global.slab_cache, GFP_KERNEL);
if (!prealloc)
return NULL;
mutex_lock(&ref->mutex);
GEM_BUG_ON(i915_active_is_idle(ref));
parent = NULL;
p = &ref->tree.rb_node;
@ -155,8 +161,10 @@ active_instance(struct i915_active *ref, u64 idx)
parent = *p;
node = rb_entry(parent, struct active_node, node);
if (node->timeline == idx)
goto replace;
if (node->timeline == idx) {
kmem_cache_free(global.slab_cache, prealloc);
goto out;
}
if (node->timeline < idx)
p = &parent->rb_right;
@ -164,17 +172,7 @@ active_instance(struct i915_active *ref, u64 idx)
p = &parent->rb_left;
}
node = kmem_cache_alloc(global.slab_cache, GFP_KERNEL);
/* kmalloc may retire the ref->last (thanks shrinker)! */
if (unlikely(!i915_active_request_raw(&ref->last, BKL(ref)))) {
kmem_cache_free(global.slab_cache, node);
goto out;
}
if (unlikely(!node))
return ERR_PTR(-ENOMEM);
node = prealloc;
i915_active_request_init(&node->base, NULL, node_retire);
node->ref = ref;
node->timeline = idx;
@ -182,40 +180,29 @@ active_instance(struct i915_active *ref, u64 idx)
rb_link_node(&node->node, parent, p);
rb_insert_color(&node->node, &ref->tree);
replace:
/*
* Overwrite the previous active slot in the rbtree with last,
* leaving last zeroed. If the previous slot is still active,
* we must be careful as we now only expect to receive one retire
* callback not two, and so much undo the active counting for the
* overwritten slot.
*/
if (i915_active_request_isset(&node->base)) {
/* Retire ourselves from the old rq->active_list */
__list_del_entry(&node->base.link);
ref->count--;
GEM_BUG_ON(!ref->count);
}
GEM_BUG_ON(list_empty(&ref->last.link));
list_replace_init(&ref->last.link, &node->base.link);
node->base.request = fetch_and_zero(&ref->last.request);
out:
return &ref->last;
ref->cache = node;
mutex_unlock(&ref->mutex);
return &node->base;
}
void i915_active_init(struct drm_i915_private *i915,
struct i915_active *ref,
void (*retire)(struct i915_active *ref))
void __i915_active_init(struct drm_i915_private *i915,
struct i915_active *ref,
int (*active)(struct i915_active *ref),
void (*retire)(struct i915_active *ref),
struct lock_class_key *key)
{
debug_active_init(ref);
ref->i915 = i915;
ref->active = active;
ref->retire = retire;
ref->tree = RB_ROOT;
i915_active_request_init(&ref->last, NULL, last_retire);
ref->cache = NULL;
init_llist_head(&ref->barriers);
ref->count = 0;
atomic_set(&ref->count, 0);
__mutex_init(&ref->mutex, "i915_active", key);
}
int i915_active_ref(struct i915_active *ref,
@ -223,68 +210,84 @@ int i915_active_ref(struct i915_active *ref,
struct i915_request *rq)
{
struct i915_active_request *active;
int err = 0;
int err;
/* Prevent reaping in case we malloc/wait while building the tree */
i915_active_acquire(ref);
err = i915_active_acquire(ref);
if (err)
return err;
active = active_instance(ref, timeline);
if (IS_ERR(active)) {
err = PTR_ERR(active);
if (!active) {
err = -ENOMEM;
goto out;
}
if (!i915_active_request_isset(active))
ref->count++;
atomic_inc(&ref->count);
__i915_active_request_set(active, rq);
GEM_BUG_ON(!ref->count);
out:
i915_active_release(ref);
return err;
}
bool i915_active_acquire(struct i915_active *ref)
int i915_active_acquire(struct i915_active *ref)
{
int err;
debug_active_assert(ref);
lockdep_assert_held(BKL(ref));
if (atomic_add_unless(&ref->count, 1, 0))
return 0;
if (ref->count++)
return false;
err = mutex_lock_interruptible(&ref->mutex);
if (err)
return err;
debug_active_activate(ref);
return true;
if (!atomic_read(&ref->count) && ref->active)
err = ref->active(ref);
if (!err) {
debug_active_activate(ref);
atomic_inc(&ref->count);
}
mutex_unlock(&ref->mutex);
return err;
}
void i915_active_release(struct i915_active *ref)
{
debug_active_assert(ref);
lockdep_assert_held(BKL(ref));
__active_retire(ref);
active_retire(ref);
}
int i915_active_wait(struct i915_active *ref)
{
struct active_node *it, *n;
int ret = 0;
int err;
if (i915_active_acquire(ref))
goto out_release;
might_sleep();
if (RB_EMPTY_ROOT(&ref->tree))
return 0;
ret = i915_active_request_retire(&ref->last, BKL(ref));
if (ret)
goto out_release;
err = mutex_lock_interruptible(&ref->mutex);
if (err)
return err;
if (!atomic_add_unless(&ref->count, 1, 0)) {
mutex_unlock(&ref->mutex);
return 0;
}
rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) {
ret = i915_active_request_retire(&it->base, BKL(ref));
if (ret)
err = i915_active_request_retire(&it->base, BKL(ref));
if (err)
break;
}
out_release:
i915_active_release(ref);
return ret;
__active_retire(ref);
return err;
}
int i915_request_await_active_request(struct i915_request *rq,
@ -299,23 +302,24 @@ int i915_request_await_active_request(struct i915_request *rq,
int i915_request_await_active(struct i915_request *rq, struct i915_active *ref)
{
struct active_node *it, *n;
int err = 0;
int err;
if (RB_EMPTY_ROOT(&ref->tree))
return 0;
/* await allocates and so we need to avoid hitting the shrinker */
if (i915_active_acquire(ref))
goto out; /* was idle */
err = i915_request_await_active_request(rq, &ref->last);
err = i915_active_acquire(ref);
if (err)
goto out;
return err;
mutex_lock(&ref->mutex);
rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) {
err = i915_request_await_active_request(rq, &it->base);
if (err)
goto out;
break;
}
mutex_unlock(&ref->mutex);
out:
i915_active_release(ref);
return err;
}
@ -324,9 +328,9 @@ out:
void i915_active_fini(struct i915_active *ref)
{
debug_active_fini(ref);
GEM_BUG_ON(i915_active_request_isset(&ref->last));
GEM_BUG_ON(!RB_EMPTY_ROOT(&ref->tree));
GEM_BUG_ON(ref->count);
GEM_BUG_ON(atomic_read(&ref->count));
mutex_destroy(&ref->mutex);
}
#endif
@ -353,7 +357,7 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref,
(void *)engine, node_retire);
node->timeline = kctx->ring->timeline->fence_context;
node->ref = ref;
ref->count++;
atomic_inc(&ref->count);
intel_engine_pm_get(engine);
llist_add((struct llist_node *)&node->base.link,
@ -380,8 +384,9 @@ void i915_active_acquire_barrier(struct i915_active *ref)
{
struct llist_node *pos, *next;
i915_active_acquire(ref);
GEM_BUG_ON(i915_active_is_idle(ref));
mutex_lock_nested(&ref->mutex, SINGLE_DEPTH_NESTING);
llist_for_each_safe(pos, next, llist_del_all(&ref->barriers)) {
struct intel_engine_cs *engine;
struct active_node *node;
@ -411,7 +416,7 @@ void i915_active_acquire_barrier(struct i915_active *ref)
&engine->barrier_tasks);
intel_engine_pm_put(engine);
}
i915_active_release(ref);
mutex_unlock(&ref->mutex);
}
void i915_request_add_barriers(struct i915_request *rq)

25
drivers/gpu/drm/i915/i915_active.h
View File

@ -369,9 +369,16 @@ i915_active_request_retire(struct i915_active_request *active,
* synchronisation.
*/
void i915_active_init(struct drm_i915_private *i915,
struct i915_active *ref,
void (*retire)(struct i915_active *ref));
void __i915_active_init(struct drm_i915_private *i915,
struct i915_active *ref,
int (*active)(struct i915_active *ref),
void (*retire)(struct i915_active *ref),
struct lock_class_key *key);
#define i915_active_init(i915, ref, active, retire) do { \
static struct lock_class_key __key; \
\
__i915_active_init(i915, ref, active, retire, &__key); \
} while (0)
int i915_active_ref(struct i915_active *ref,
u64 timeline,
@ -384,20 +391,14 @@ int i915_request_await_active(struct i915_request *rq,
int i915_request_await_active_request(struct i915_request *rq,
struct i915_active_request *active);
bool i915_active_acquire(struct i915_active *ref);
static inline void i915_active_cancel(struct i915_active *ref)
{
GEM_BUG_ON(ref->count != 1);
ref->count = 0;
}
int i915_active_acquire(struct i915_active *ref);
void i915_active_release(struct i915_active *ref);
void __i915_active_release_nested(struct i915_active *ref, int subclass);
static inline bool
i915_active_is_idle(const struct i915_active *ref)
{
return !ref->count;
return !atomic_read(&ref->count);
}
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)

10
drivers/gpu/drm/i915/i915_active_types.h
View File

@ -7,7 +7,9 @@
#ifndef _I915_ACTIVE_TYPES_H_
#define _I915_ACTIVE_TYPES_H_
#include <linux/atomic.h>
#include <linux/llist.h>
#include <linux/mutex.h>
#include <linux/rbtree.h>
#include <linux/rcupdate.h>
@ -24,13 +26,17 @@ struct i915_active_request {
i915_active_retire_fn retire;
};
struct active_node;
struct i915_active {
struct drm_i915_private *i915;
struct active_node *cache;
struct rb_root tree;
struct i915_active_request last;
unsigned int count;
struct mutex mutex;
atomic_t count;
int (*active)(struct i915_active *ref);
void (*retire)(struct i915_active *ref);
struct llist_head barriers;

2
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -2055,7 +2055,7 @@ static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size)
if (!vma)
return ERR_PTR(-ENOMEM);
i915_active_init(i915, &vma->active, NULL);
i915_active_init(i915, &vma->active, NULL, NULL);
INIT_ACTIVE_REQUEST(&vma->last_fence);
vma->vm = &ggtt->vm;

22
drivers/gpu/drm/i915/i915_vma.c
View File

@ -78,11 +78,20 @@ static void vma_print_allocator(struct i915_vma *vma, const char *reason)
#endif
static inline struct i915_vma *active_to_vma(struct i915_active *ref)
{
return container_of(ref, typeof(struct i915_vma), active);
}
static int __i915_vma_active(struct i915_active *ref)
{
i915_vma_get(active_to_vma(ref));
return 0;
}
static void __i915_vma_retire(struct i915_active *ref)
{
struct i915_vma *vma = container_of(ref, typeof(*vma), active);
i915_vma_put(vma);
i915_vma_put(active_to_vma(ref));
}
static struct i915_vma *
@ -107,7 +116,8 @@ vma_create(struct drm_i915_gem_object *obj,
vma->size = obj->base.size;
vma->display_alignment = I915_GTT_MIN_ALIGNMENT;
i915_active_init(vm->i915, &vma->active, __i915_vma_retire);
i915_active_init(vm->i915, &vma->active,
__i915_vma_active, __i915_vma_retire);
INIT_ACTIVE_REQUEST(&vma->last_fence);
INIT_LIST_HEAD(&vma->closed_link);
@ -904,11 +914,7 @@ int i915_vma_move_to_active(struct i915_vma *vma,
* add the active reference first and queue for it to be dropped
* *last*.
*/
if (i915_active_acquire(&vma->active))
i915_vma_get(vma);
err = i915_active_ref(&vma->active, rq->fence.context, rq);
i915_active_release(&vma->active);
if (unlikely(err))
return err;

53
drivers/gpu/drm/i915/selftests/i915_active.c
View File

@ -4,6 +4,8 @@
* Copyright © 2018 Intel Corporation
*/
#include <linux/kref.h>
#include "gem/i915_gem_pm.h"
#include "i915_selftest.h"
@ -13,20 +15,47 @@
struct live_active {
struct i915_active base;
struct kref ref;
bool retired;
};
static void __live_get(struct live_active *active)
{
kref_get(&active->ref);
}
static void __live_free(struct live_active *active)
{
i915_active_fini(&active->base);
kfree(active);
}
static void __live_release(struct kref *ref)
{
struct live_active *active = container_of(ref, typeof(*active), ref);
__live_free(active);
}
static void __live_put(struct live_active *active)
{
kref_put(&active->ref, __live_release);
}
static int __live_active(struct i915_active *base)
{
struct live_active *active = container_of(base, typeof(*active), base);
__live_get(active);
return 0;
}
static void __live_retire(struct i915_active *base)
{
struct live_active *active = container_of(base, typeof(*active), base);
active->retired = true;
__live_put(active);
}
static struct live_active *__live_alloc(struct drm_i915_private *i915)
@ -37,7 +66,8 @@ static struct live_active *__live_alloc(struct drm_i915_private *i915)
if (!active)
return NULL;
i915_active_init(i915, &active->base, __live_retire);
kref_init(&active->ref);
i915_active_init(i915, &active->base, __live_active, __live_retire);
return active;
}
@ -62,11 +92,9 @@ __live_active_setup(struct drm_i915_private *i915)
return ERR_PTR(-ENOMEM);
}
if (!i915_active_acquire(&active->base)) {
pr_err("First i915_active_acquire should report being idle\n");
err = -EINVAL;
err = i915_active_acquire(&active->base);
if (err)
goto out;
}
for_each_engine(engine, i915, id) {
struct i915_request *rq;
@ -97,18 +125,21 @@ __live_active_setup(struct drm_i915_private *i915)
pr_err("i915_active retired before submission!\n");
err = -EINVAL;
}
if (active->base.count != count) {
if (atomic_read(&active->base.count) != count) {
pr_err("i915_active not tracking all requests, found %d, expected %d\n",
active->base.count, count);
atomic_read(&active->base.count), count);
err = -EINVAL;
}
out:
i915_sw_fence_commit(submit);
heap_fence_put(submit);
if (err) {
__live_put(active);
active = ERR_PTR(err);
}
/* XXX leaks live_active on error */
return err ? ERR_PTR(err) : active;
return active;
}
static int live_active_wait(void *arg)
@ -135,7 +166,7 @@ static int live_active_wait(void *arg)
err = -EINVAL;
}
__live_free(active);
__live_put(active);
if (igt_flush_test(i915, I915_WAIT_LOCKED))
err = -EIO;
@ -174,7 +205,7 @@ static int live_active_retire(void *arg)
err = -EINVAL;
}
__live_free(active);
__live_put(active);
err:
intel_runtime_pm_put(&i915->runtime_pm, wakeref);