struct i915_vma *vma;
unsigned int frontbuffer_bits;
int pin_count = 0;
- enum intel_engine_id id;
lockdep_assert_held(&obj->base.dev->struct_mutex);
- seq_printf(m, "%pK: %c%c%c%c%c %8zdKiB %02x %02x [ ",
+ seq_printf(m, "%pK: %c%c%c%c%c %8zdKiB %02x %02x %s%s%s",
&obj->base,
get_active_flag(obj),
get_pin_flag(obj),
get_pin_mapped_flag(obj),
obj->base.size / 1024,
obj->base.read_domains,
- obj->base.write_domain);
- for_each_engine(engine, dev_priv, id)
- seq_printf(m, "%x ",
- i915_gem_active_get_seqno(&obj->last_read[id],
- &obj->base.dev->struct_mutex));
- seq_printf(m, "] %x %s%s%s",
- i915_gem_active_get_seqno(&obj->last_write,
- &obj->base.dev->struct_mutex),
+ obj->base.write_domain,
i915_cache_level_str(dev_priv, obj->cache_level),
obj->mm.dirty ? " dirty" : "",
obj->mm.madv == I915_MADV_DONTNEED ? " purgeable" : "");
if (obj->stolen)
seq_printf(m, " (stolen: %08llx)", obj->stolen->start);
- engine = i915_gem_active_get_engine(&obj->last_write,
- &dev_priv->drm.struct_mutex);
+ engine = i915_gem_object_last_write_engine(obj);
if (engine)
seq_printf(m, " (%s)", engine->name);
#include <linux/intel-iommu.h>
#include <linux/kref.h>
#include <linux/pm_qos.h>
+#include <linux/reservation.h>
#include <linux/shmem_fs.h>
#include <drm/drmP.h>
struct list_head batch_pool_link;
unsigned long flags;
- /**
- * This is set if the object is on the active lists (has pending
- * rendering and so a non-zero seqno), and is not set if it i s on
- * inactive (ready to be unbound) list.
- */
-#define I915_BO_ACTIVE_SHIFT 0
-#define I915_BO_ACTIVE_MASK ((1 << I915_NUM_ENGINES) - 1)
-#define __I915_BO_ACTIVE(bo) \
- ((READ_ONCE((bo)->flags) >> I915_BO_ACTIVE_SHIFT) & I915_BO_ACTIVE_MASK)
/**
* Have we taken a reference for the object for incomplete GPU
* activity?
*/
-#define I915_BO_ACTIVE_REF (I915_BO_ACTIVE_SHIFT + I915_NUM_ENGINES)
+#define I915_BO_ACTIVE_REF 0
/*
* Is the object to be mapped as read-only to the GPU
/** Count of VMA actually bound by this object */
unsigned int bind_count;
+ unsigned int active_count;
unsigned int pin_display;
struct {
* read request. This allows for the CPU to read from an active
* buffer by only waiting for the write to complete.
*/
- struct i915_gem_active last_read[I915_NUM_ENGINES];
- struct i915_gem_active last_write;
+ struct reservation_object *resv;
/** References from framebuffers, locks out tiling changes. */
unsigned long framebuffer_references;
/** for phys allocated objects */
struct drm_dma_handle *phys_handle;
+
+ struct reservation_object __builtin_resv;
};
static inline struct drm_i915_gem_object *
return obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE;
}
-static inline unsigned long
-i915_gem_object_get_active(const struct drm_i915_gem_object *obj)
-{
- return (obj->flags >> I915_BO_ACTIVE_SHIFT) & I915_BO_ACTIVE_MASK;
-}
-
static inline bool
i915_gem_object_is_active(const struct drm_i915_gem_object *obj)
{
- return i915_gem_object_get_active(obj);
-}
-
-static inline void
-i915_gem_object_set_active(struct drm_i915_gem_object *obj, int engine)
-{
- obj->flags |= BIT(engine + I915_BO_ACTIVE_SHIFT);
-}
-
-static inline void
-i915_gem_object_clear_active(struct drm_i915_gem_object *obj, int engine)
-{
- obj->flags &= ~BIT(engine + I915_BO_ACTIVE_SHIFT);
-}
-
-static inline bool
-i915_gem_object_has_active_engine(const struct drm_i915_gem_object *obj,
- int engine)
-{
- return obj->flags & BIT(engine + I915_BO_ACTIVE_SHIFT);
+ return obj->active_count;
}
static inline bool
return obj->tiling_and_stride & STRIDE_MASK;
}
+static inline struct intel_engine_cs *
+i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
+{
+ struct intel_engine_cs *engine = NULL;
+ struct dma_fence *fence;
+
+ rcu_read_lock();
+ fence = reservation_object_get_excl_rcu(obj->resv);
+ rcu_read_unlock();
+
+ if (fence && dma_fence_is_i915(fence) && !dma_fence_is_signaled(fence))
+ engine = to_request(fence)->engine;
+ dma_fence_put(fence);
+
+ return engine;
+}
+
static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
{
i915_gem_object_get(vma->obj);
#include <drm/drm_vma_manager.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
-#include "i915_gem_dmabuf.h"
#include "i915_vgpu.h"
#include "i915_trace.h"
#include "intel_drv.h"
long timeout,
struct intel_rps_client *rps)
{
- struct reservation_object *resv;
- struct i915_gem_active *active;
- unsigned long active_mask;
- int idx;
-
might_sleep();
#if IS_ENABLED(CONFIG_LOCKDEP)
GEM_BUG_ON(debug_locks &&
#endif
GEM_BUG_ON(timeout < 0);
- if (flags & I915_WAIT_ALL) {
- active = obj->last_read;
- active_mask = i915_gem_object_get_active(obj);
- } else {
- active_mask = 1;
- active = &obj->last_write;
- }
-
- for_each_active(active_mask, idx) {
- struct drm_i915_gem_request *request;
-
- request = i915_gem_active_get_unlocked(&active[idx]);
- if (request) {
- timeout = i915_gem_object_wait_fence(&request->fence,
- flags, timeout,
- rps);
- i915_gem_request_put(request);
- }
- if (timeout < 0)
- return timeout;
- }
-
- resv = i915_gem_object_get_dmabuf_resv(obj);
- if (resv)
- timeout = i915_gem_object_wait_reservation(resv,
- flags, timeout,
- rps);
+ timeout = i915_gem_object_wait_reservation(obj->resv,
+ flags, timeout,
+ rps);
return timeout < 0 ? timeout : 0;
}
goto out_unlock;
}
-static void
-i915_gem_object_retire__write(struct i915_gem_active *active,
- struct drm_i915_gem_request *request)
-{
- struct drm_i915_gem_object *obj =
- container_of(active, struct drm_i915_gem_object, last_write);
-
- intel_fb_obj_flush(obj, true, ORIGIN_CS);
-}
-
-static void
-i915_gem_object_retire__read(struct i915_gem_active *active,
- struct drm_i915_gem_request *request)
-{
- int idx = request->engine->id;
- struct drm_i915_gem_object *obj =
- container_of(active, struct drm_i915_gem_object, last_read[idx]);
-
- GEM_BUG_ON(!i915_gem_object_has_active_engine(obj, idx));
-
- i915_gem_object_clear_active(obj, idx);
- if (i915_gem_object_is_active(obj))
- return;
-
- /* Bump our place on the bound list to keep it roughly in LRU order
- * so that we don't steal from recently used but inactive objects
- * (unless we are forced to ofc!)
- */
- if (obj->bind_count)
- list_move_tail(&obj->global_list,
- &request->i915->mm.bound_list);
-
- if (i915_gem_object_has_active_reference(obj)) {
- i915_gem_object_clear_active_reference(obj);
- i915_gem_object_put(obj);
- }
-}
-
static bool i915_context_is_banned(const struct i915_gem_context *ctx)
{
unsigned long elapsed;
* In order to prevent it from being recursively closed,
* take a pin on the vma so that the second unbind is
* aborted.
+ *
+ * Even more scary is that the retire callback may free
+ * the object (last active vma). To prevent the explosion
+ * we defer the actual object free to a worker that can
+ * only proceed once it acquires the struct_mutex (which
+ * we currently hold, therefore it cannot free this object
+ * before we are finished).
*/
__i915_vma_pin(vma);
}
static __always_inline unsigned int
-__busy_set_if_active(const struct i915_gem_active *active,
+__busy_set_if_active(const struct dma_fence *fence,
unsigned int (*flag)(unsigned int id))
{
- struct drm_i915_gem_request *request;
-
- request = rcu_dereference(active->request);
- if (!request || i915_gem_request_completed(request))
- return 0;
+ struct drm_i915_gem_request *rq;
- /* This is racy. See __i915_gem_active_get_rcu() for an in detail
- * discussion of how to handle the race correctly, but for reporting
- * the busy state we err on the side of potentially reporting the
- * wrong engine as being busy (but we guarantee that the result
- * is at least self-consistent).
- *
- * As we use SLAB_DESTROY_BY_RCU, the request may be reallocated
- * whilst we are inspecting it, even under the RCU read lock as we are.
- * This means that there is a small window for the engine and/or the
- * seqno to have been overwritten. The seqno will always be in the
- * future compared to the intended, and so we know that if that
- * seqno is idle (on whatever engine) our request is idle and the
- * return 0 above is correct.
+ /* We have to check the current hw status of the fence as the uABI
+ * guarantees forward progress. We could rely on the idle worker
+ * to eventually flush us, but to minimise latency just ask the
+ * hardware.
*
- * The issue is that if the engine is switched, it is just as likely
- * to report that it is busy (but since the switch happened, we know
- * the request should be idle). So there is a small chance that a busy
- * result is actually the wrong engine.
- *
- * So why don't we care?
- *
- * For starters, the busy ioctl is a heuristic that is by definition
- * racy. Even with perfect serialisation in the driver, the hardware
- * state is constantly advancing - the state we report to the user
- * is stale.
- *
- * The critical information for the busy-ioctl is whether the object
- * is idle as userspace relies on that to detect whether its next
- * access will stall, or if it has missed submitting commands to
- * the hardware allowing the GPU to stall. We never generate a
- * false-positive for idleness, thus busy-ioctl is reliable at the
- * most fundamental level, and we maintain the guarantee that a
- * busy object left to itself will eventually become idle (and stay
- * idle!).
- *
- * We allow ourselves the leeway of potentially misreporting the busy
- * state because that is an optimisation heuristic that is constantly
- * in flux. Being quickly able to detect the busy/idle state is much
- * more important than accurate logging of exactly which engines were
- * busy.
- *
- * For accuracy in reporting the engine, we could use
- *
- * result = 0;
- * request = __i915_gem_active_get_rcu(active);
- * if (request) {
- * if (!i915_gem_request_completed(request))
- * result = flag(request->engine->exec_id);
- * i915_gem_request_put(request);
- * }
- *
- * but that still remains susceptible to both hardware and userspace
- * races. So we accept making the result of that race slightly worse,
- * given the rarity of the race and its low impact on the result.
+ * Note we only report on the status of native fences.
*/
- return flag(READ_ONCE(request->engine->exec_id));
+ if (!dma_fence_is_i915(fence))
+ return 0;
+
+ /* opencode to_request() in order to avoid const warnings */
+ rq = container_of(fence, struct drm_i915_gem_request, fence);
+ if (i915_gem_request_completed(rq))
+ return 0;
+
+ return flag(rq->engine->exec_id);
}
static __always_inline unsigned int
-busy_check_reader(const struct i915_gem_active *active)
+busy_check_reader(const struct dma_fence *fence)
{
- return __busy_set_if_active(active, __busy_read_flag);
+ return __busy_set_if_active(fence, __busy_read_flag);
}
static __always_inline unsigned int
-busy_check_writer(const struct i915_gem_active *active)
+busy_check_writer(const struct dma_fence *fence)
{
- return __busy_set_if_active(active, __busy_write_id);
+ if (!fence)
+ return 0;
+
+ return __busy_set_if_active(fence, __busy_write_id);
}
int
{
struct drm_i915_gem_busy *args = data;
struct drm_i915_gem_object *obj;
- unsigned long active;
+ struct reservation_object_list *list;
+ unsigned int seq;
int err;
+ err = -ENOENT;
rcu_read_lock();
obj = i915_gem_object_lookup_rcu(file, args->handle);
- if (!obj) {
- err = -ENOENT;
+ if (!obj)
goto out;
- }
- args->busy = 0;
- active = __I915_BO_ACTIVE(obj);
- if (active) {
- int idx;
+ /* A discrepancy here is that we do not report the status of
+ * non-i915 fences, i.e. even though we may report the object as idle,
+ * a call to set-domain may still stall waiting for foreign rendering.
+ * This also means that wait-ioctl may report an object as busy,
+ * where busy-ioctl considers it idle.
+ *
+ * We trade the ability to warn of foreign fences to report on which
+ * i915 engines are active for the object.
+ *
+ * Alternatively, we can trade that extra information on read/write
+ * activity with
+ * args->busy =
+ * !reservation_object_test_signaled_rcu(obj->resv, true);
+ * to report the overall busyness. This is what the wait-ioctl does.
+ *
+ */
+retry:
+ seq = raw_read_seqcount(&obj->resv->seq);
- /* Yes, the lookups are intentionally racy.
- *
- * First, we cannot simply rely on __I915_BO_ACTIVE. We have
- * to regard the value as stale and as our ABI guarantees
- * forward progress, we confirm the status of each active
- * request with the hardware.
- *
- * Even though we guard the pointer lookup by RCU, that only
- * guarantees that the pointer and its contents remain
- * dereferencable and does *not* mean that the request we
- * have is the same as the one being tracked by the object.
- *
- * Consider that we lookup the request just as it is being
- * retired and freed. We take a local copy of the pointer,
- * but before we add its engine into the busy set, the other
- * thread reallocates it and assigns it to a task on another
- * engine with a fresh and incomplete seqno. Guarding against
- * that requires careful serialisation and reference counting,
- * i.e. using __i915_gem_active_get_request_rcu(). We don't,
- * instead we expect that if the result is busy, which engines
- * are busy is not completely reliable - we only guarantee
- * that the object was busy.
- */
+ /* Translate the exclusive fence to the READ *and* WRITE engine */
+ args->busy = busy_check_writer(rcu_dereference(obj->resv->fence_excl));
- for_each_active(active, idx)
- args->busy |= busy_check_reader(&obj->last_read[idx]);
+ /* Translate shared fences to READ set of engines */
+ list = rcu_dereference(obj->resv->fence);
+ if (list) {
+ unsigned int shared_count = list->shared_count, i;
- /* For ABI sanity, we only care that the write engine is in
- * the set of read engines. This should be ensured by the
- * ordering of setting last_read/last_write in
- * i915_vma_move_to_active(), and then in reverse in retire.
- * However, for good measure, we always report the last_write
- * request as a busy read as well as being a busy write.
- *
- * We don't care that the set of active read/write engines
- * may change during construction of the result, as it is
- * equally liable to change before userspace can inspect
- * the result.
- */
- args->busy |= busy_check_writer(&obj->last_write);
+ for (i = 0; i < shared_count; ++i) {
+ struct dma_fence *fence =
+ rcu_dereference(list->shared[i]);
+
+ args->busy |= busy_check_reader(fence);
+ }
}
+ if (args->busy && read_seqcount_retry(&obj->resv->seq, seq))
+ goto retry;
+
+ err = 0;
out:
rcu_read_unlock();
return err;
void i915_gem_object_init(struct drm_i915_gem_object *obj,
const struct drm_i915_gem_object_ops *ops)
{
- int i;
-
mutex_init(&obj->mm.lock);
INIT_LIST_HEAD(&obj->global_list);
INIT_LIST_HEAD(&obj->userfault_link);
- for (i = 0; i < I915_NUM_ENGINES; i++)
- init_request_active(&obj->last_read[i],
- i915_gem_object_retire__read);
- init_request_active(&obj->last_write,
- i915_gem_object_retire__write);
INIT_LIST_HEAD(&obj->obj_exec_link);
INIT_LIST_HEAD(&obj->vma_list);
INIT_LIST_HEAD(&obj->batch_pool_link);
obj->ops = ops;
+ reservation_object_init(&obj->__builtin_resv);
+ obj->resv = &obj->__builtin_resv;
+
obj->frontbuffer_ggtt_origin = ORIGIN_GTT;
obj->mm.madv = I915_MADV_WILLNEED;
if (obj->base.import_attach)
drm_prime_gem_destroy(&obj->base, NULL);
+ reservation_object_fini(&obj->__builtin_resv);
drm_gem_object_release(&obj->base);
i915_gem_info_remove_obj(i915, obj->base.size);
list_for_each_entry(tmp, list, batch_pool_link) {
/* The batches are strictly LRU ordered */
- if (!i915_gem_active_is_idle(&tmp->last_read[pool->engine->id],
- &tmp->base.dev->struct_mutex))
+ if (i915_gem_object_is_active(tmp))
break;
+ GEM_BUG_ON(!reservation_object_test_signaled_rcu(tmp->resv,
+ true));
+
if (tmp->base.size >= size) {
+ /* Clear the set of shared fences early */
+ ww_mutex_lock(&tmp->resv->lock, NULL);
+ reservation_object_add_excl_fence(tmp->resv, NULL);
+ ww_mutex_unlock(&tmp->resv->lock);
+
obj = tmp;
break;
}
.end_cpu_access = i915_gem_end_cpu_access,
};
-static void export_fences(struct drm_i915_gem_object *obj,
- struct dma_buf *dma_buf)
-{
- struct reservation_object *resv = dma_buf->resv;
- struct drm_i915_gem_request *req;
- unsigned long active;
- int idx;
-
- active = __I915_BO_ACTIVE(obj);
- if (!active)
- return;
-
- /* Serialise with execbuf to prevent concurrent fence-loops */
- mutex_lock(&obj->base.dev->struct_mutex);
-
- /* Mark the object for future fences before racily adding old fences */
- obj->base.dma_buf = dma_buf;
-
- ww_mutex_lock(&resv->lock, NULL);
-
- for_each_active(active, idx) {
- req = i915_gem_active_get(&obj->last_read[idx],
- &obj->base.dev->struct_mutex);
- if (!req)
- continue;
-
- if (reservation_object_reserve_shared(resv) == 0)
- reservation_object_add_shared_fence(resv, &req->fence);
-
- i915_gem_request_put(req);
- }
-
- req = i915_gem_active_get(&obj->last_write,
- &obj->base.dev->struct_mutex);
- if (req) {
- reservation_object_add_excl_fence(resv, &req->fence);
- i915_gem_request_put(req);
- }
-
- ww_mutex_unlock(&resv->lock);
- mutex_unlock(&obj->base.dev->struct_mutex);
-}
-
struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *gem_obj, int flags)
{
struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
- struct dma_buf *dma_buf;
exp_info.ops = &i915_dmabuf_ops;
exp_info.size = gem_obj->size;
exp_info.flags = flags;
exp_info.priv = gem_obj;
+ exp_info.resv = obj->resv;
if (obj->ops->dmabuf_export) {
int ret = obj->ops->dmabuf_export(obj);
return ERR_PTR(ret);
}
- dma_buf = drm_gem_dmabuf_export(dev, &exp_info);
- if (IS_ERR(dma_buf))
- return dma_buf;
-
- export_fences(obj, dma_buf);
- return dma_buf;
+ return drm_gem_dmabuf_export(dev, &exp_info);
}
static struct sg_table *
drm_gem_private_object_init(dev, &obj->base, dma_buf->size);
i915_gem_object_init(obj, &i915_gem_object_dmabuf_ops);
obj->base.import_attach = attach;
+ obj->resv = dma_buf->resv;
/* We use GTT as shorthand for a coherent domain, one that is
* neither in the GPU cache nor in the CPU cache, where all
+++ /dev/null
-/*
- * Copyright 2016 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.
- *
- */
-
-#ifndef _I915_GEM_DMABUF_H_
-#define _I915_GEM_DMABUF_H_
-
-#include <linux/dma-buf.h>
-
-static inline struct reservation_object *
-i915_gem_object_get_dmabuf_resv(struct drm_i915_gem_object *obj)
-{
- struct dma_buf *dma_buf;
-
- if (obj->base.dma_buf)
- dma_buf = obj->base.dma_buf;
- else if (obj->base.import_attach)
- dma_buf = obj->base.import_attach->dmabuf;
- else
- return NULL;
-
- return dma_buf->resv;
-}
-
-#endif
#include <drm/i915_drm.h>
#include "i915_drv.h"
-#include "i915_gem_dmabuf.h"
#include "i915_trace.h"
#include "intel_drv.h"
#include "intel_frontbuffer.h"
return ret;
}
-static unsigned int eb_other_engines(struct drm_i915_gem_request *req)
-{
- unsigned int mask;
-
- mask = ~intel_engine_flag(req->engine) & I915_BO_ACTIVE_MASK;
- mask <<= I915_BO_ACTIVE_SHIFT;
-
- return mask;
-}
-
static int
i915_gem_execbuffer_move_to_gpu(struct drm_i915_gem_request *req,
struct list_head *vmas)
{
- const unsigned int other_rings = eb_other_engines(req);
struct i915_vma *vma;
int ret;
list_for_each_entry(vma, vmas, exec_list) {
struct drm_i915_gem_object *obj = vma->obj;
- struct reservation_object *resv;
- if (obj->flags & other_rings) {
- ret = i915_gem_request_await_object
- (req, obj, obj->base.pending_write_domain);
- if (ret)
- return ret;
- }
-
- resv = i915_gem_object_get_dmabuf_resv(obj);
- if (resv) {
- ret = i915_sw_fence_await_reservation
- (&req->submit, resv, &i915_fence_ops,
- obj->base.pending_write_domain,
- I915_FENCE_TIMEOUT,
- GFP_KERNEL | __GFP_NOWARN);
- if (ret < 0)
- return ret;
- }
+ ret = i915_gem_request_await_object
+ (req, obj, obj->base.pending_write_domain);
+ if (ret)
+ return ret;
if (obj->base.write_domain & I915_GEM_DOMAIN_CPU)
i915_gem_clflush_object(obj, false);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
- obj->mm.dirty = true; /* be paranoid */
-
/* Add a reference if we're newly entering the active list.
* The order in which we add operations to the retirement queue is
* vital here: mark_active adds to the start of the callback list,
* add the active reference first and queue for it to be dropped
* *last*.
*/
- i915_gem_object_set_active(obj, idx);
- i915_gem_active_set(&obj->last_read[idx], req);
+ if (!i915_vma_is_active(vma))
+ obj->active_count++;
+ i915_vma_set_active(vma, idx);
+ i915_gem_active_set(&vma->last_read[idx], req);
+ list_move_tail(&vma->vm_link, &vma->vm->active_list);
if (flags & EXEC_OBJECT_WRITE) {
- i915_gem_active_set(&obj->last_write, req);
+ i915_gem_active_set(&vma->last_write, req);
intel_fb_obj_invalidate(obj, ORIGIN_CS);
if (flags & EXEC_OBJECT_NEEDS_FENCE)
i915_gem_active_set(&vma->last_fence, req);
-
- i915_vma_set_active(vma, idx);
- i915_gem_active_set(&vma->last_read[idx], req);
- list_move_tail(&vma->vm_link, &vma->vm->active_list);
}
static void eb_export_fence(struct drm_i915_gem_object *obj,
struct drm_i915_gem_request *req,
unsigned int flags)
{
- struct reservation_object *resv;
-
- resv = i915_gem_object_get_dmabuf_resv(obj);
- if (!resv)
- return;
+ struct reservation_object *resv = obj->resv;
/* Ignore errors from failing to allocate the new fence, we can't
* handle an error right now. Worst case should be missed
#include "i915_vgpu.h"
#include "i915_trace.h"
#include "intel_drv.h"
+#include "intel_frontbuffer.h"
#define I915_GFP_DMA (GFP_KERNEL | __GFP_HIGHMEM)
const unsigned int idx = rq->engine->id;
struct i915_vma *vma =
container_of(active, struct i915_vma, last_read[idx]);
+ struct drm_i915_gem_object *obj = vma->obj;
GEM_BUG_ON(!i915_vma_has_active_engine(vma, idx));
list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma)))
WARN_ON(i915_vma_unbind(vma));
+
+ GEM_BUG_ON(!i915_gem_object_is_active(obj));
+ if (--obj->active_count)
+ return;
+
+ /* Bump our place on the bound list to keep it roughly in LRU order
+ * so that we don't steal from recently used but inactive objects
+ * (unless we are forced to ofc!)
+ */
+ if (obj->bind_count)
+ list_move_tail(&obj->global_list, &rq->i915->mm.bound_list);
+
+ obj->mm.dirty = true; /* be paranoid */
+
+ if (i915_gem_object_has_active_reference(obj)) {
+ i915_gem_object_clear_active_reference(obj);
+ i915_gem_object_put(obj);
+ }
+}
+
+static void
+i915_ggtt_retire__write(struct i915_gem_active *active,
+ struct drm_i915_gem_request *request)
+{
+ struct i915_vma *vma =
+ container_of(active, struct i915_vma, last_write);
+
+ intel_fb_obj_flush(vma->obj, true, ORIGIN_CS);
}
void i915_vma_destroy(struct i915_vma *vma)
INIT_LIST_HEAD(&vma->exec_list);
for (i = 0; i < ARRAY_SIZE(vma->last_read); i++)
init_request_active(&vma->last_read[i], i915_vma_retire);
+ init_request_active(&vma->last_write,
+ i915_is_ggtt(vm) ? i915_ggtt_retire__write : NULL);
init_request_active(&vma->last_fence, NULL);
list_add(&vma->vm_link, &vm->unbound_list);
vma->vm = vm;
unsigned int active;
struct i915_gem_active last_read[I915_NUM_ENGINES];
+ struct i915_gem_active last_write;
struct i915_gem_active last_fence;
/**
}
i915_gem_context_put(request->ctx);
+
+ dma_fence_signal(&request->fence);
i915_gem_request_put(request);
}
struct drm_i915_gem_object *obj,
bool write)
{
- struct i915_gem_active *active;
- unsigned long active_mask;
- int idx;
+ struct dma_fence *excl;
+ int ret = 0;
if (write) {
- active_mask = i915_gem_object_get_active(obj);
- active = obj->last_read;
+ struct dma_fence **shared;
+ unsigned int count, i;
+
+ ret = reservation_object_get_fences_rcu(obj->resv,
+ &excl, &count, &shared);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < count; i++) {
+ ret = i915_gem_request_await_dma_fence(to, shared[i]);
+ if (ret)
+ break;
+
+ dma_fence_put(shared[i]);
+ }
+
+ for (; i < count; i++)
+ dma_fence_put(shared[i]);
+ kfree(shared);
} else {
- active_mask = 1;
- active = &obj->last_write;
+ excl = reservation_object_get_excl_rcu(obj->resv);
}
- for_each_active(active_mask, idx) {
- struct drm_i915_gem_request *request;
- int ret;
-
- request = i915_gem_active_peek(&active[idx],
- &obj->base.dev->struct_mutex);
- if (!request)
- continue;
+ if (excl) {
+ if (ret == 0)
+ ret = i915_gem_request_await_dma_fence(to, excl);
- ret = i915_gem_request_await_request(to, request);
- if (ret)
- return ret;
+ dma_fence_put(excl);
}
- return 0;
+ return ret;
}
static void i915_gem_mark_busy(const struct intel_engine_cs *engine)
}
/**
- * i915_gem_active_is_idle - report whether the active tracker is idle
- * @active - the active tracker
- *
- * i915_gem_active_is_idle() returns true if the active tracker is currently
- * unassigned or if the request is complete (but not yet retired). Requires
- * the caller to hold struct_mutex (but that can be relaxed if desired).
- */
-static inline bool
-i915_gem_active_is_idle(const struct i915_gem_active *active,
- struct mutex *mutex)
-{
- return !i915_gem_active_peek(active, mutex);
-}
-
-/**
- * i915_gem_active_wait- waits until the request is completed
+ * i915_gem_active_wait - waits until the request is completed
* @active - the active request on which to wait
* @flags - how to wait
* @timeout - how long to wait at most
return 0;
}
-/* Convenience functions for peeking at state inside active's request whilst
- * guarded by the struct_mutex.
- */
-
-static inline uint32_t
-i915_gem_active_get_seqno(const struct i915_gem_active *active,
- struct mutex *mutex)
-{
- return i915_gem_request_get_seqno(i915_gem_active_peek(active, mutex));
-}
-
-static inline struct intel_engine_cs *
-i915_gem_active_get_engine(const struct i915_gem_active *active,
- struct mutex *mutex)
-{
- return i915_gem_request_get_engine(i915_gem_active_peek(active, mutex));
-}
-
#define for_each_active(mask, idx) \
for (; mask ? idx = ffs(mask) - 1, 1 : 0; mask &= ~BIT(idx))
err->name = obj->base.name;
for (i = 0; i < I915_NUM_ENGINES; i++)
- err->rseqno[i] = __active_get_seqno(&obj->last_read[i]);
- err->wseqno = __active_get_seqno(&obj->last_write);
- err->engine = __active_get_engine_id(&obj->last_write);
+ err->rseqno[i] = __active_get_seqno(&vma->last_read[i]);
+ err->wseqno = __active_get_seqno(&vma->last_write);
+ err->engine = __active_get_engine_id(&vma->last_write);
err->gtt_offset = vma->node.start;
err->read_domains = obj->base.read_domains;
state = &intel_state->base;
__drm_atomic_helper_plane_duplicate_state(plane, state);
- intel_state->wait_req = NULL;
return state;
}
intel_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state)
{
- WARN_ON(state && to_intel_plane_state(state)->wait_req);
drm_atomic_helper_plane_destroy_state(plane, state);
}
#include "intel_frontbuffer.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
-#include "i915_gem_dmabuf.h"
#include "intel_dsi.h"
#include "i915_trace.h"
#include <drm/drm_atomic.h>
static bool use_mmio_flip(struct intel_engine_cs *engine,
struct drm_i915_gem_object *obj)
{
- struct reservation_object *resv;
-
/*
* This is not being used for older platforms, because
* non-availability of flip done interrupt forces us to use
else if (i915.enable_execlists)
return true;
- resv = i915_gem_object_get_dmabuf_resv(obj);
- if (resv && !reservation_object_test_signaled_rcu(resv, false))
- return true;
-
- return engine != i915_gem_active_get_engine(&obj->last_write,
- &obj->base.dev->struct_mutex);
+ return engine != i915_gem_object_last_write_engine(obj);
}
static void skl_do_mmio_flip(struct intel_crtc *intel_crtc,
struct intel_framebuffer *intel_fb =
to_intel_framebuffer(crtc->base.primary->fb);
struct drm_i915_gem_object *obj = intel_fb->obj;
- struct reservation_object *resv;
- if (work->flip_queued_req)
- WARN_ON(i915_wait_request(work->flip_queued_req,
- 0, MAX_SCHEDULE_TIMEOUT) < 0);
-
- /* For framebuffer backed by dmabuf, wait for fence */
- resv = i915_gem_object_get_dmabuf_resv(obj);
- if (resv)
- WARN_ON(reservation_object_wait_timeout_rcu(resv, false, false,
- MAX_SCHEDULE_TIMEOUT) < 0);
+ WARN_ON(i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT, NULL) < 0);
intel_pipe_update_start(crtc);
} else if (IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv)) {
engine = dev_priv->engine[BCS];
} else if (INTEL_INFO(dev)->gen >= 7) {
- engine = i915_gem_active_get_engine(&obj->last_write,
- &obj->base.dev->struct_mutex);
+ engine = i915_gem_object_last_write_engine(obj);
if (engine == NULL || engine->id != RCS)
engine = dev_priv->engine[BCS];
} else {
if (mmio_flip) {
INIT_WORK(&work->mmio_work, intel_mmio_flip_work_func);
-
- work->flip_queued_req = i915_gem_active_get(&obj->last_write,
- &obj->base.dev->struct_mutex);
queue_work(system_unbound_wq, &work->mmio_work);
} else {
request = i915_gem_request_alloc(engine, engine->last_context);
}
static int intel_atomic_prepare_commit(struct drm_device *dev,
- struct drm_atomic_state *state,
- bool nonblock)
+ struct drm_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(dev);
- struct drm_plane_state *plane_state;
struct drm_crtc_state *crtc_state;
- struct drm_plane *plane;
struct drm_crtc *crtc;
int i, ret;
ret = drm_atomic_helper_prepare_planes(dev, state);
mutex_unlock(&dev->struct_mutex);
- if (!ret && !nonblock) {
- for_each_plane_in_state(state, plane, plane_state, i) {
- struct intel_plane_state *intel_plane_state =
- to_intel_plane_state(plane_state);
- long timeout;
-
- if (!intel_plane_state->wait_req)
- continue;
-
- timeout = i915_wait_request(intel_plane_state->wait_req,
- I915_WAIT_INTERRUPTIBLE,
- MAX_SCHEDULE_TIMEOUT);
- if (timeout < 0) {
- /* Any hang should be swallowed by the wait */
- WARN_ON(timeout == -EIO);
- mutex_lock(&dev->struct_mutex);
- drm_atomic_helper_cleanup_planes(dev, state);
- mutex_unlock(&dev->struct_mutex);
- ret = timeout;
- break;
- }
- }
- }
-
return ret;
}
struct drm_crtc_state *old_crtc_state;
struct drm_crtc *crtc;
struct intel_crtc_state *intel_cstate;
- struct drm_plane *plane;
- struct drm_plane_state *plane_state;
bool hw_check = intel_state->modeset;
unsigned long put_domains[I915_MAX_PIPES] = {};
unsigned crtc_vblank_mask = 0;
int i;
- for_each_plane_in_state(state, plane, plane_state, i) {
- struct intel_plane_state *intel_plane_state =
- to_intel_plane_state(plane->state);
-
- if (!intel_plane_state->wait_req)
- continue;
-
- /* EIO should be eaten, and we can't get interrupted in the
- * worker, and blocking commits have waited already. */
- WARN_ON(i915_wait_request(intel_plane_state->wait_req,
- 0, MAX_SCHEDULE_TIMEOUT) < 0);
- }
-
drm_atomic_helper_wait_for_dependencies(state);
if (intel_state->modeset) {
INIT_WORK(&state->commit_work, intel_atomic_commit_work);
- ret = intel_atomic_prepare_commit(dev, state, nonblock);
+ ret = intel_atomic_prepare_commit(dev, state);
if (ret) {
DRM_DEBUG_ATOMIC("Preparing state failed with %i\n", ret);
return ret;
struct drm_framebuffer *fb = new_state->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->state->fb);
- struct reservation_object *resv;
+ long lret;
int ret = 0;
if (!obj && !old_obj)
return 0;
/* For framebuffer backed by dmabuf, wait for fence */
- resv = i915_gem_object_get_dmabuf_resv(obj);
- if (resv) {
- long lret;
+ lret = i915_gem_object_wait(obj,
+ I915_WAIT_INTERRUPTIBLE | I915_WAIT_LOCKED,
+ MAX_SCHEDULE_TIMEOUT,
+ NULL);
+ if (lret == -ERESTARTSYS)
+ return lret;
- lret = reservation_object_wait_timeout_rcu(resv, false, true,
- MAX_SCHEDULE_TIMEOUT);
- if (lret == -ERESTARTSYS)
- return lret;
-
- WARN(lret < 0, "waiting returns %li\n", lret);
- }
+ WARN(lret < 0, "waiting returns %li\n", lret);
if (plane->type == DRM_PLANE_TYPE_CURSOR &&
INTEL_INFO(dev)->cursor_needs_physical) {
int align = IS_I830(dev_priv) ? 16 * 1024 : 256;
ret = i915_gem_object_attach_phys(obj, align);
- if (ret)
+ if (ret) {
DRM_DEBUG_KMS("failed to attach phys object\n");
+ return ret;
+ }
} else {
struct i915_vma *vma;
vma = intel_pin_and_fence_fb_obj(fb, new_state->rotation);
- if (IS_ERR(vma))
- ret = PTR_ERR(vma);
- }
-
- if (ret == 0) {
- to_intel_plane_state(new_state)->wait_req =
- i915_gem_active_get(&obj->last_write,
- &obj->base.dev->struct_mutex);
+ if (IS_ERR(vma)) {
+ DRM_DEBUG_KMS("failed to pin object\n");
+ return PTR_ERR(vma);
+ }
}
- return ret;
+ return 0;
}
/**
{
struct drm_device *dev = plane->dev;
struct intel_plane_state *old_intel_state;
- struct intel_plane_state *intel_state = to_intel_plane_state(plane->state);
struct drm_i915_gem_object *old_obj = intel_fb_obj(old_state->fb);
struct drm_i915_gem_object *obj = intel_fb_obj(plane->state->fb);
if (old_obj && (plane->type != DRM_PLANE_TYPE_CURSOR ||
!INTEL_INFO(dev)->cursor_needs_physical))
intel_unpin_fb_obj(old_state->fb, old_state->rotation);
-
- i915_gem_request_assign(&intel_state->wait_req, NULL);
- i915_gem_request_assign(&old_intel_state->wait_req, NULL);
}
int
int scaler_id;
struct drm_intel_sprite_colorkey ckey;
-
- /* async flip related structures */
- struct drm_i915_gem_request *wait_req;
};
struct intel_initial_plane_config {
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