[PATCH 5.18 0472/1095] drm/amdgpu: cleanup ctx implementation

From: Greg Kroah-Hartman
Date: Mon Aug 15 2022 - 17:19:07 EST

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From: Christian König <christian.koenig@xxxxxxx>

[ Upstream commit 69493c034d2455204dfcd370de8c4dc204374a94 ]

Let each context have a pointer to the ctx manager and properly
initialize the adev pointer inside the context manager.

Reduce the BUG_ON() in amdgpu_ctx_add_fence() into a WARN_ON() and
directly return the sequence number instead of writing into a parmeter.

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Shashank Sharma <shashank.sharma@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 46 ++++++++++++-------------
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h | 11 +++---
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 +-
4 files changed, 30 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 2019622191b5..ee0cbc6ccbfb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1260,7 +1260,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,

p->fence = dma_fence_get(&job->base.s_fence->finished);

- amdgpu_ctx_add_fence(p->ctx, entity, p->fence, &seq);
+ seq = amdgpu_ctx_add_fence(p->ctx, entity, p->fence);
amdgpu_cs_post_dependencies(p);

if ((job->preamble_status & AMDGPU_PREAMBLE_IB_PRESENT) &&
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index c317078d1afd..a61e4c83a545 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -135,9 +135,9 @@ static enum amdgpu_ring_priority_level amdgpu_ctx_sched_prio_to_ring_prio(int32_

static unsigned int amdgpu_ctx_get_hw_prio(struct amdgpu_ctx *ctx, u32 hw_ip)
{
- struct amdgpu_device *adev = ctx->adev;
- int32_t ctx_prio;
+ struct amdgpu_device *adev = ctx->mgr->adev;
unsigned int hw_prio;
+ int32_t ctx_prio;

ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
ctx->init_priority : ctx->override_priority;
@@ -166,7 +166,7 @@ static unsigned int amdgpu_ctx_get_hw_prio(struct amdgpu_ctx *ctx, u32 hw_ip)
static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
const u32 ring)
{
- struct amdgpu_device *adev = ctx->adev;
+ struct amdgpu_device *adev = ctx->mgr->adev;
struct amdgpu_ctx_entity *entity;
struct drm_gpu_scheduler **scheds = NULL, *sched = NULL;
unsigned num_scheds = 0;
@@ -220,10 +220,8 @@ static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
return r;
}

-static int amdgpu_ctx_init(struct amdgpu_device *adev,
- int32_t priority,
- struct drm_file *filp,
- struct amdgpu_ctx *ctx)
+static int amdgpu_ctx_init(struct amdgpu_ctx_mgr *mgr, int32_t priority,
+ struct drm_file *filp, struct amdgpu_ctx *ctx)
{
int r;

@@ -233,15 +231,14 @@ static int amdgpu_ctx_init(struct amdgpu_device *adev,

memset(ctx, 0, sizeof(*ctx));

- ctx->adev = adev;
-
kref_init(&ctx->refcount);
+ ctx->mgr = mgr;
spin_lock_init(&ctx->ring_lock);
mutex_init(&ctx->lock);

- ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
+ ctx->reset_counter = atomic_read(&mgr->adev->gpu_reset_counter);
ctx->reset_counter_query = ctx->reset_counter;
- ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
+ ctx->vram_lost_counter = atomic_read(&mgr->adev->vram_lost_counter);
ctx->init_priority = priority;
ctx->override_priority = AMDGPU_CTX_PRIORITY_UNSET;
ctx->stable_pstate = AMDGPU_CTX_STABLE_PSTATE_NONE;
@@ -266,7 +263,7 @@ static void amdgpu_ctx_fini_entity(struct amdgpu_ctx_entity *entity)
static int amdgpu_ctx_get_stable_pstate(struct amdgpu_ctx *ctx,
u32 *stable_pstate)
{
- struct amdgpu_device *adev = ctx->adev;
+ struct amdgpu_device *adev = ctx->mgr->adev;
enum amd_dpm_forced_level current_level;

current_level = amdgpu_dpm_get_performance_level(adev);
@@ -294,7 +291,7 @@ static int amdgpu_ctx_get_stable_pstate(struct amdgpu_ctx *ctx,
static int amdgpu_ctx_set_stable_pstate(struct amdgpu_ctx *ctx,
u32 stable_pstate)
{
- struct amdgpu_device *adev = ctx->adev;
+ struct amdgpu_device *adev = ctx->mgr->adev;
enum amd_dpm_forced_level level;
u32 current_stable_pstate;
int r;
@@ -345,7 +342,8 @@ static int amdgpu_ctx_set_stable_pstate(struct amdgpu_ctx *ctx,
static void amdgpu_ctx_fini(struct kref *ref)
{
struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
- struct amdgpu_device *adev = ctx->adev;
+ struct amdgpu_ctx_mgr *mgr = ctx->mgr;
+ struct amdgpu_device *adev = mgr->adev;
unsigned i, j, idx;

if (!adev)
@@ -421,7 +419,7 @@ static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
}

*id = (uint32_t)r;
- r = amdgpu_ctx_init(adev, priority, filp, ctx);
+ r = amdgpu_ctx_init(mgr, priority, filp, ctx);
if (r) {
idr_remove(&mgr->ctx_handles, *id);
*id = 0;
@@ -671,9 +669,9 @@ int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
return 0;
}

-void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
- struct drm_sched_entity *entity,
- struct dma_fence *fence, uint64_t *handle)
+uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
+ struct drm_sched_entity *entity,
+ struct dma_fence *fence)
{
struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
uint64_t seq = centity->sequence;
@@ -682,8 +680,7 @@ void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,

idx = seq & (amdgpu_sched_jobs - 1);
other = centity->fences[idx];
- if (other)
- BUG_ON(!dma_fence_is_signaled(other));
+ WARN_ON(other && !dma_fence_is_signaled(other));

dma_fence_get(fence);

@@ -693,8 +690,7 @@ void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
spin_unlock(&ctx->ring_lock);

dma_fence_put(other);
- if (handle)
- *handle = seq;
+ return seq;
}

struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
@@ -731,7 +727,7 @@ static void amdgpu_ctx_set_entity_priority(struct amdgpu_ctx *ctx,
int hw_ip,
int32_t priority)
{
- struct amdgpu_device *adev = ctx->adev;
+ struct amdgpu_device *adev = ctx->mgr->adev;
unsigned int hw_prio;
struct drm_gpu_scheduler **scheds = NULL;
unsigned num_scheds;
@@ -796,8 +792,10 @@ int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
return r;
}

-void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
+void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr,
+ struct amdgpu_device *adev)
{
+ mgr->adev = adev;
mutex_init(&mgr->lock);
idr_init(&mgr->ctx_handles);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
index 142f2f87d44c..681050bc828c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
@@ -40,7 +40,7 @@ struct amdgpu_ctx_entity {

struct amdgpu_ctx {
struct kref refcount;
- struct amdgpu_device *adev;
+ struct amdgpu_ctx_mgr *mgr;
unsigned reset_counter;
unsigned reset_counter_query;
uint32_t vram_lost_counter;
@@ -70,9 +70,9 @@ int amdgpu_ctx_put(struct amdgpu_ctx *ctx);

int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
u32 ring, struct drm_sched_entity **entity);
-void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
- struct drm_sched_entity *entity,
- struct dma_fence *fence, uint64_t *seq);
+uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
+ struct drm_sched_entity *entity,
+ struct dma_fence *fence);
struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
struct drm_sched_entity *entity,
uint64_t seq);
@@ -85,7 +85,8 @@ int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
struct drm_sched_entity *entity);

-void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr);
+void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr,
+ struct amdgpu_device *adev);
void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr);
long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout);
void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 49c55d82cba8..20a432a774c1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1142,7 +1142,7 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
mutex_init(&fpriv->bo_list_lock);
idr_init(&fpriv->bo_list_handles);

- amdgpu_ctx_mgr_init(&fpriv->ctx_mgr);
+ amdgpu_ctx_mgr_init(&fpriv->ctx_mgr, adev);

file_priv->driver_priv = fpriv;
goto out_suspend;
--
2.35.1

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