mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
f33a8a5160
wait_for_timelines is essentially the same loop as retiring requests (with an extra timeout), so merge the two into one routine. v2: i915_retire_requests_timeout and keep VT'd w/a as !interruptible Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191004134015.13204-10-chris@chris-wilson.co.uk
469 lines
15 KiB
C
469 lines
15 KiB
C
/*
|
|
* Copyright © 2008-2018 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_REQUEST_H
|
|
#define I915_REQUEST_H
|
|
|
|
#include <linux/dma-fence.h>
|
|
#include <linux/lockdep.h>
|
|
|
|
#include "gt/intel_context_types.h"
|
|
#include "gt/intel_engine_types.h"
|
|
|
|
#include "i915_gem.h"
|
|
#include "i915_scheduler.h"
|
|
#include "i915_selftest.h"
|
|
#include "i915_sw_fence.h"
|
|
|
|
#include <uapi/drm/i915_drm.h>
|
|
|
|
struct drm_file;
|
|
struct drm_i915_gem_object;
|
|
struct i915_request;
|
|
struct intel_timeline;
|
|
struct intel_timeline_cacheline;
|
|
|
|
struct i915_capture_list {
|
|
struct i915_capture_list *next;
|
|
struct i915_vma *vma;
|
|
};
|
|
|
|
enum {
|
|
/*
|
|
* I915_FENCE_FLAG_ACTIVE - this request is currently submitted to HW.
|
|
*
|
|
* Set by __i915_request_submit() on handing over to HW, and cleared
|
|
* by __i915_request_unsubmit() if we preempt this request.
|
|
*
|
|
* Finally cleared for consistency on retiring the request, when
|
|
* we know the HW is no longer running this request.
|
|
*
|
|
* See i915_request_is_active()
|
|
*/
|
|
I915_FENCE_FLAG_ACTIVE = DMA_FENCE_FLAG_USER_BITS,
|
|
|
|
/*
|
|
* I915_FENCE_FLAG_SIGNAL - this request is currently on signal_list
|
|
*
|
|
* Internal bookkeeping used by the breadcrumb code to track when
|
|
* a request is on the various signal_list.
|
|
*/
|
|
I915_FENCE_FLAG_SIGNAL,
|
|
};
|
|
|
|
/**
|
|
* Request queue structure.
|
|
*
|
|
* The request queue allows us to note sequence numbers that have been emitted
|
|
* and may be associated with active buffers to be retired.
|
|
*
|
|
* By keeping this list, we can avoid having to do questionable sequence
|
|
* number comparisons on buffer last_read|write_seqno. It also allows an
|
|
* emission time to be associated with the request for tracking how far ahead
|
|
* of the GPU the submission is.
|
|
*
|
|
* When modifying this structure be very aware that we perform a lockless
|
|
* RCU lookup of it that may race against reallocation of the struct
|
|
* from the slab freelist. We intentionally do not zero the structure on
|
|
* allocation so that the lookup can use the dangling pointers (and is
|
|
* cogniscent that those pointers may be wrong). Instead, everything that
|
|
* needs to be initialised must be done so explicitly.
|
|
*
|
|
* The requests are reference counted.
|
|
*/
|
|
struct i915_request {
|
|
struct dma_fence fence;
|
|
spinlock_t lock;
|
|
|
|
/** On Which ring this request was generated */
|
|
struct drm_i915_private *i915;
|
|
|
|
/**
|
|
* Context and ring buffer related to this request
|
|
* Contexts are refcounted, so when this request is associated with a
|
|
* context, we must increment the context's refcount, to guarantee that
|
|
* it persists while any request is linked to it. Requests themselves
|
|
* are also refcounted, so the request will only be freed when the last
|
|
* reference to it is dismissed, and the code in
|
|
* i915_request_free() will then decrement the refcount on the
|
|
* context.
|
|
*/
|
|
struct i915_gem_context *gem_context;
|
|
struct intel_engine_cs *engine;
|
|
struct intel_context *hw_context;
|
|
struct intel_ring *ring;
|
|
struct intel_timeline __rcu *timeline;
|
|
struct list_head signal_link;
|
|
|
|
/*
|
|
* The rcu epoch of when this request was allocated. Used to judiciously
|
|
* apply backpressure on future allocations to ensure that under
|
|
* mempressure there is sufficient RCU ticks for us to reclaim our
|
|
* RCU protected slabs.
|
|
*/
|
|
unsigned long rcustate;
|
|
|
|
/*
|
|
* We pin the timeline->mutex while constructing the request to
|
|
* ensure that no caller accidentally drops it during construction.
|
|
* The timeline->mutex must be held to ensure that only this caller
|
|
* can use the ring and manipulate the associated timeline during
|
|
* construction.
|
|
*/
|
|
struct pin_cookie cookie;
|
|
|
|
/*
|
|
* Fences for the various phases in the request's lifetime.
|
|
*
|
|
* The submit fence is used to await upon all of the request's
|
|
* dependencies. When it is signaled, the request is ready to run.
|
|
* It is used by the driver to then queue the request for execution.
|
|
*/
|
|
struct i915_sw_fence submit;
|
|
union {
|
|
wait_queue_entry_t submitq;
|
|
struct i915_sw_dma_fence_cb dmaq;
|
|
};
|
|
struct list_head execute_cb;
|
|
struct i915_sw_fence semaphore;
|
|
|
|
/*
|
|
* A list of everyone we wait upon, and everyone who waits upon us.
|
|
* Even though we will not be submitted to the hardware before the
|
|
* submit fence is signaled (it waits for all external events as well
|
|
* as our own requests), the scheduler still needs to know the
|
|
* dependency tree for the lifetime of the request (from execbuf
|
|
* to retirement), i.e. bidirectional dependency information for the
|
|
* request not tied to individual fences.
|
|
*/
|
|
struct i915_sched_node sched;
|
|
struct i915_dependency dep;
|
|
intel_engine_mask_t execution_mask;
|
|
|
|
/*
|
|
* A convenience pointer to the current breadcrumb value stored in
|
|
* the HW status page (or our timeline's local equivalent). The full
|
|
* path would be rq->hw_context->ring->timeline->hwsp_seqno.
|
|
*/
|
|
const u32 *hwsp_seqno;
|
|
|
|
/*
|
|
* If we need to access the timeline's seqno for this request in
|
|
* another request, we need to keep a read reference to this associated
|
|
* cacheline, so that we do not free and recycle it before the foreign
|
|
* observers have completed. Hence, we keep a pointer to the cacheline
|
|
* inside the timeline's HWSP vma, but it is only valid while this
|
|
* request has not completed and guarded by the timeline mutex.
|
|
*/
|
|
struct intel_timeline_cacheline *hwsp_cacheline;
|
|
|
|
/** Position in the ring of the start of the request */
|
|
u32 head;
|
|
|
|
/** Position in the ring of the start of the user packets */
|
|
u32 infix;
|
|
|
|
/**
|
|
* Position in the ring of the start of the postfix.
|
|
* This is required to calculate the maximum available ring space
|
|
* without overwriting the postfix.
|
|
*/
|
|
u32 postfix;
|
|
|
|
/** Position in the ring of the end of the whole request */
|
|
u32 tail;
|
|
|
|
/** Position in the ring of the end of any workarounds after the tail */
|
|
u32 wa_tail;
|
|
|
|
/** Preallocate space in the ring for the emitting the request */
|
|
u32 reserved_space;
|
|
|
|
/** Batch buffer related to this request if any (used for
|
|
* error state dump only).
|
|
*/
|
|
struct i915_vma *batch;
|
|
/**
|
|
* Additional buffers requested by userspace to be captured upon
|
|
* a GPU hang. The vma/obj on this list are protected by their
|
|
* active reference - all objects on this list must also be
|
|
* on the active_list (of their final request).
|
|
*/
|
|
struct i915_capture_list *capture_list;
|
|
|
|
/** Time at which this request was emitted, in jiffies. */
|
|
unsigned long emitted_jiffies;
|
|
|
|
unsigned long flags;
|
|
#define I915_REQUEST_WAITBOOST BIT(0)
|
|
#define I915_REQUEST_NOPREEMPT BIT(1)
|
|
|
|
/** timeline->request entry for this request */
|
|
struct list_head link;
|
|
|
|
struct drm_i915_file_private *file_priv;
|
|
/** file_priv list entry for this request */
|
|
struct list_head client_link;
|
|
|
|
I915_SELFTEST_DECLARE(struct {
|
|
struct list_head link;
|
|
unsigned long delay;
|
|
} mock;)
|
|
};
|
|
|
|
#define I915_FENCE_GFP (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
|
|
|
|
extern const struct dma_fence_ops i915_fence_ops;
|
|
|
|
static inline bool dma_fence_is_i915(const struct dma_fence *fence)
|
|
{
|
|
return fence->ops == &i915_fence_ops;
|
|
}
|
|
|
|
struct i915_request * __must_check
|
|
__i915_request_create(struct intel_context *ce, gfp_t gfp);
|
|
struct i915_request * __must_check
|
|
i915_request_create(struct intel_context *ce);
|
|
|
|
struct i915_request *__i915_request_commit(struct i915_request *request);
|
|
void __i915_request_queue(struct i915_request *rq,
|
|
const struct i915_sched_attr *attr);
|
|
|
|
void i915_request_retire_upto(struct i915_request *rq);
|
|
|
|
static inline struct i915_request *
|
|
to_request(struct dma_fence *fence)
|
|
{
|
|
/* We assume that NULL fence/request are interoperable */
|
|
BUILD_BUG_ON(offsetof(struct i915_request, fence) != 0);
|
|
GEM_BUG_ON(fence && !dma_fence_is_i915(fence));
|
|
return container_of(fence, struct i915_request, fence);
|
|
}
|
|
|
|
static inline struct i915_request *
|
|
i915_request_get(struct i915_request *rq)
|
|
{
|
|
return to_request(dma_fence_get(&rq->fence));
|
|
}
|
|
|
|
static inline struct i915_request *
|
|
i915_request_get_rcu(struct i915_request *rq)
|
|
{
|
|
return to_request(dma_fence_get_rcu(&rq->fence));
|
|
}
|
|
|
|
static inline void
|
|
i915_request_put(struct i915_request *rq)
|
|
{
|
|
dma_fence_put(&rq->fence);
|
|
}
|
|
|
|
int i915_request_await_object(struct i915_request *to,
|
|
struct drm_i915_gem_object *obj,
|
|
bool write);
|
|
int i915_request_await_dma_fence(struct i915_request *rq,
|
|
struct dma_fence *fence);
|
|
int i915_request_await_execution(struct i915_request *rq,
|
|
struct dma_fence *fence,
|
|
void (*hook)(struct i915_request *rq,
|
|
struct dma_fence *signal));
|
|
|
|
void i915_request_add(struct i915_request *rq);
|
|
|
|
bool __i915_request_submit(struct i915_request *request);
|
|
void i915_request_submit(struct i915_request *request);
|
|
|
|
void i915_request_skip(struct i915_request *request, int error);
|
|
|
|
void __i915_request_unsubmit(struct i915_request *request);
|
|
void i915_request_unsubmit(struct i915_request *request);
|
|
|
|
/* Note: part of the intel_breadcrumbs family */
|
|
bool i915_request_enable_breadcrumb(struct i915_request *request);
|
|
void i915_request_cancel_breadcrumb(struct i915_request *request);
|
|
|
|
long i915_request_wait(struct i915_request *rq,
|
|
unsigned int flags,
|
|
long timeout)
|
|
__attribute__((nonnull(1)));
|
|
#define I915_WAIT_INTERRUPTIBLE BIT(0)
|
|
#define I915_WAIT_PRIORITY BIT(1) /* small priority bump for the request */
|
|
#define I915_WAIT_ALL BIT(2) /* used by i915_gem_object_wait() */
|
|
|
|
static inline bool i915_request_signaled(const struct i915_request *rq)
|
|
{
|
|
/* The request may live longer than its HWSP, so check flags first! */
|
|
return test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &rq->fence.flags);
|
|
}
|
|
|
|
static inline bool i915_request_is_active(const struct i915_request *rq)
|
|
{
|
|
return test_bit(I915_FENCE_FLAG_ACTIVE, &rq->fence.flags);
|
|
}
|
|
|
|
/**
|
|
* Returns true if seq1 is later than seq2.
|
|
*/
|
|
static inline bool i915_seqno_passed(u32 seq1, u32 seq2)
|
|
{
|
|
return (s32)(seq1 - seq2) >= 0;
|
|
}
|
|
|
|
static inline u32 __hwsp_seqno(const struct i915_request *rq)
|
|
{
|
|
return READ_ONCE(*rq->hwsp_seqno);
|
|
}
|
|
|
|
/**
|
|
* hwsp_seqno - the current breadcrumb value in the HW status page
|
|
* @rq: the request, to chase the relevant HW status page
|
|
*
|
|
* The emphasis in naming here is that hwsp_seqno() is not a property of the
|
|
* request, but an indication of the current HW state (associated with this
|
|
* request). Its value will change as the GPU executes more requests.
|
|
*
|
|
* Returns the current breadcrumb value in the associated HW status page (or
|
|
* the local timeline's equivalent) for this request. The request itself
|
|
* has the associated breadcrumb value of rq->fence.seqno, when the HW
|
|
* status page has that breadcrumb or later, this request is complete.
|
|
*/
|
|
static inline u32 hwsp_seqno(const struct i915_request *rq)
|
|
{
|
|
u32 seqno;
|
|
|
|
rcu_read_lock(); /* the HWSP may be freed at runtime */
|
|
seqno = __hwsp_seqno(rq);
|
|
rcu_read_unlock();
|
|
|
|
return seqno;
|
|
}
|
|
|
|
static inline bool __i915_request_has_started(const struct i915_request *rq)
|
|
{
|
|
return i915_seqno_passed(hwsp_seqno(rq), rq->fence.seqno - 1);
|
|
}
|
|
|
|
/**
|
|
* i915_request_started - check if the request has begun being executed
|
|
* @rq: the request
|
|
*
|
|
* If the timeline is not using initial breadcrumbs, a request is
|
|
* considered started if the previous request on its timeline (i.e.
|
|
* context) has been signaled.
|
|
*
|
|
* If the timeline is using semaphores, it will also be emitting an
|
|
* "initial breadcrumb" after the semaphores are complete and just before
|
|
* it began executing the user payload. A request can therefore be active
|
|
* on the HW and not yet started as it is still busywaiting on its
|
|
* dependencies (via HW semaphores).
|
|
*
|
|
* If the request has started, its dependencies will have been signaled
|
|
* (either by fences or by semaphores) and it will have begun processing
|
|
* the user payload.
|
|
*
|
|
* However, even if a request has started, it may have been preempted and
|
|
* so no longer active, or it may have already completed.
|
|
*
|
|
* See also i915_request_is_active().
|
|
*
|
|
* Returns true if the request has begun executing the user payload, or
|
|
* has completed:
|
|
*/
|
|
static inline bool i915_request_started(const struct i915_request *rq)
|
|
{
|
|
if (i915_request_signaled(rq))
|
|
return true;
|
|
|
|
/* Remember: started but may have since been preempted! */
|
|
return __i915_request_has_started(rq);
|
|
}
|
|
|
|
/**
|
|
* i915_request_is_running - check if the request may actually be executing
|
|
* @rq: the request
|
|
*
|
|
* Returns true if the request is currently submitted to hardware, has passed
|
|
* its start point (i.e. the context is setup and not busywaiting). Note that
|
|
* it may no longer be running by the time the function returns!
|
|
*/
|
|
static inline bool i915_request_is_running(const struct i915_request *rq)
|
|
{
|
|
if (!i915_request_is_active(rq))
|
|
return false;
|
|
|
|
return __i915_request_has_started(rq);
|
|
}
|
|
|
|
static inline bool i915_request_completed(const struct i915_request *rq)
|
|
{
|
|
if (i915_request_signaled(rq))
|
|
return true;
|
|
|
|
return i915_seqno_passed(hwsp_seqno(rq), rq->fence.seqno);
|
|
}
|
|
|
|
static inline void i915_request_mark_complete(struct i915_request *rq)
|
|
{
|
|
rq->hwsp_seqno = (u32 *)&rq->fence.seqno; /* decouple from HWSP */
|
|
}
|
|
|
|
static inline bool i915_request_has_waitboost(const struct i915_request *rq)
|
|
{
|
|
return rq->flags & I915_REQUEST_WAITBOOST;
|
|
}
|
|
|
|
static inline bool i915_request_has_nopreempt(const struct i915_request *rq)
|
|
{
|
|
/* Preemption should only be disabled very rarely */
|
|
return unlikely(rq->flags & I915_REQUEST_NOPREEMPT);
|
|
}
|
|
|
|
static inline struct intel_timeline *
|
|
i915_request_timeline(struct i915_request *rq)
|
|
{
|
|
/* Valid only while the request is being constructed (or retired). */
|
|
return rcu_dereference_protected(rq->timeline,
|
|
lockdep_is_held(&rcu_access_pointer(rq->timeline)->mutex));
|
|
}
|
|
|
|
static inline struct intel_timeline *
|
|
i915_request_active_timeline(struct i915_request *rq)
|
|
{
|
|
/*
|
|
* When in use during submission, we are protected by a guarantee that
|
|
* the context/timeline is pinned and must remain pinned until after
|
|
* this submission.
|
|
*/
|
|
return rcu_dereference_protected(rq->timeline,
|
|
lockdep_is_held(&rq->engine->active.lock));
|
|
}
|
|
|
|
long i915_retire_requests_timeout(struct drm_i915_private *i915, long timeout);
|
|
static inline void i915_retire_requests(struct drm_i915_private *i915)
|
|
{
|
|
i915_retire_requests_timeout(i915, 0);
|
|
}
|
|
|
|
#endif /* I915_REQUEST_H */
|