drm/v3d: Store the active job inside the queue's state

Instead of storing the queue's active job in four different variables,
store the active job inside the queue's state. This way, it's possible
to access all active jobs using an index based in `enum v3d_queue`.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Link: https://lore.kernel.org/r/20250826-v3d-queue-lock-v3-2-979efc43e490@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>

4 files changed, 38 insertions, 55 deletions

diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index 951a302336ce..d557caca5c4b 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -58,6 +58,9 @@ struct v3d_queue_state {
 
 	/* Stores the GPU stats for this queue in the global context. */
 	struct v3d_stats stats;
+
+	/* Currently active job for this queue */
+	struct v3d_job *active_job;
 };
 
 /* Performance monitor object. The perform lifetime is controlled by userspace
@@ -159,11 +162,6 @@ struct v3d_dev {
 
 	struct work_struct overflow_mem_work;
 
-	struct v3d_bin_job *bin_job;
-	struct v3d_render_job *render_job;
-	struct v3d_tfu_job *tfu_job;
-	struct v3d_csd_job *csd_job;
-
 	struct v3d_queue_state queue[V3D_MAX_QUEUES];
 
 	/* Spinlock used to synchronize the overflow memory
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 37bf5eecdd2c..cfa09b73c1ed 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -324,6 +324,7 @@ void
 v3d_gem_destroy(struct drm_device *dev)
 {
 	struct v3d_dev *v3d = to_v3d_dev(dev);
+	enum v3d_queue q;
 
 	v3d_sched_fini(v3d);
 	v3d_gemfs_fini(v3d);
@@ -331,10 +332,8 @@ v3d_gem_destroy(struct drm_device *dev)
 	/* Waiting for jobs to finish would need to be done before
 	 * unregistering V3D.
 	 */
-	WARN_ON(v3d->bin_job);
-	WARN_ON(v3d->render_job);
-	WARN_ON(v3d->tfu_job);
-	WARN_ON(v3d->csd_job);
+	for (q = 0; q < V3D_MAX_QUEUES; q++)
+		WARN_ON(v3d->queue[q].active_job);
 
 	drm_mm_takedown(&v3d->mm);
 
diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c
index a515a301e480..6605ec200828 100644
--- a/drivers/gpu/drm/v3d/v3d_irq.c
+++ b/drivers/gpu/drm/v3d/v3d_irq.c
@@ -42,6 +42,8 @@ v3d_overflow_mem_work(struct work_struct *work)
 		container_of(work, struct v3d_dev, overflow_mem_work);
 	struct drm_device *dev = &v3d->drm;
 	struct v3d_bo *bo = v3d_bo_create(dev, NULL /* XXX: GMP */, 256 * 1024);
+	struct v3d_queue_state *queue = &v3d->queue[V3D_BIN];
+	struct v3d_bin_job *bin_job;
 	struct drm_gem_object *obj;
 	unsigned long irqflags;
 
@@ -61,13 +63,15 @@ v3d_overflow_mem_work(struct work_struct *work)
 	 * some binner pool anyway.
 	 */
 	spin_lock_irqsave(&v3d->job_lock, irqflags);
-	if (!v3d->bin_job) {
+	bin_job = (struct v3d_bin_job *)queue->active_job;
+
+	if (!bin_job) {
 		spin_unlock_irqrestore(&v3d->job_lock, irqflags);
 		goto out;
 	}
 
 	drm_gem_object_get(obj);
-	list_add_tail(&bo->unref_head, &v3d->bin_job->render->unref_list);
+	list_add_tail(&bo->unref_head, &bin_job->render->unref_list);
 	spin_unlock_irqrestore(&v3d->job_lock, irqflags);
 
 	v3d_mmu_flush_all(v3d);
@@ -79,6 +83,20 @@ out:
 	drm_gem_object_put(obj);
 }
 
+static void
+v3d_irq_signal_fence(struct v3d_dev *v3d, enum v3d_queue q,
+		     void (*trace_irq)(struct drm_device *, uint64_t))
+{
+	struct v3d_queue_state *queue = &v3d->queue[q];
+	struct v3d_fence *fence = to_v3d_fence(queue->active_job->irq_fence);
+
+	v3d_job_update_stats(queue->active_job, q);
+	trace_irq(&v3d->drm, fence->seqno);
+
+	queue->active_job = NULL;
+	dma_fence_signal(&fence->base);
+}
+
 static irqreturn_t
 v3d_irq(int irq, void *arg)
 {
@@ -102,41 +120,17 @@ v3d_irq(int irq, void *arg)
 	}
 
 	if (intsts & V3D_INT_FLDONE) {
-		struct v3d_fence *fence =
-			to_v3d_fence(v3d->bin_job->base.irq_fence);
-
-		v3d_job_update_stats(&v3d->bin_job->base, V3D_BIN);
-		trace_v3d_bcl_irq(&v3d->drm, fence->seqno);
-
-		v3d->bin_job = NULL;
-		dma_fence_signal(&fence->base);
-
+		v3d_irq_signal_fence(v3d, V3D_BIN, trace_v3d_bcl_irq);
 		status = IRQ_HANDLED;
 	}
 
 	if (intsts & V3D_INT_FRDONE) {
-		struct v3d_fence *fence =
-			to_v3d_fence(v3d->render_job->base.irq_fence);
-
-		v3d_job_update_stats(&v3d->render_job->base, V3D_RENDER);
-		trace_v3d_rcl_irq(&v3d->drm, fence->seqno);
-
-		v3d->render_job = NULL;
-		dma_fence_signal(&fence->base);
-
+		v3d_irq_signal_fence(v3d, V3D_RENDER, trace_v3d_rcl_irq);
 		status = IRQ_HANDLED;
 	}
 
 	if (intsts & V3D_INT_CSDDONE(v3d->ver)) {
-		struct v3d_fence *fence =
-			to_v3d_fence(v3d->csd_job->base.irq_fence);
-
-		v3d_job_update_stats(&v3d->csd_job->base, V3D_CSD);
-		trace_v3d_csd_irq(&v3d->drm, fence->seqno);
-
-		v3d->csd_job = NULL;
-		dma_fence_signal(&fence->base);
-
+		v3d_irq_signal_fence(v3d, V3D_CSD, trace_v3d_csd_irq);
 		status = IRQ_HANDLED;
 	}
 
@@ -168,15 +162,7 @@ v3d_hub_irq(int irq, void *arg)
 	V3D_WRITE(V3D_HUB_INT_CLR, intsts);
 
 	if (intsts & V3D_HUB_INT_TFUC) {
-		struct v3d_fence *fence =
-			to_v3d_fence(v3d->tfu_job->base.irq_fence);
-
-		v3d_job_update_stats(&v3d->tfu_job->base, V3D_TFU);
-		trace_v3d_tfu_irq(&v3d->drm, fence->seqno);
-
-		v3d->tfu_job = NULL;
-		dma_fence_signal(&fence->base);
-
+		v3d_irq_signal_fence(v3d, V3D_TFU, trace_v3d_tfu_irq);
 		status = IRQ_HANDLED;
 	}
 
diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c
index 1846030c5f3a..65375e2d4922 100644
--- a/drivers/gpu/drm/v3d/v3d_sched.c
+++ b/drivers/gpu/drm/v3d/v3d_sched.c
@@ -232,7 +232,7 @@ static struct dma_fence *v3d_bin_job_run(struct drm_sched_job *sched_job)
 
 	if (unlikely(job->base.base.s_fence->finished.error)) {
 		spin_lock_irqsave(&v3d->job_lock, irqflags);
-		v3d->bin_job = NULL;
+		v3d->queue[V3D_BIN].active_job = NULL;
 		spin_unlock_irqrestore(&v3d->job_lock, irqflags);
 		return NULL;
 	}
@@ -241,7 +241,7 @@ static struct dma_fence *v3d_bin_job_run(struct drm_sched_job *sched_job)
 	 * v3d_overflow_mem_work().
 	 */
 	spin_lock_irqsave(&v3d->job_lock, irqflags);
-	v3d->bin_job = job;
+	v3d->queue[V3D_BIN].active_job = &job->base;
 	/* Clear out the overflow allocation, so we don't
 	 * reuse the overflow attached to a previous job.
 	 */
@@ -290,11 +290,11 @@ static struct dma_fence *v3d_render_job_run(struct drm_sched_job *sched_job)
 	struct dma_fence *fence;
 
 	if (unlikely(job->base.base.s_fence->finished.error)) {
-		v3d->render_job = NULL;
+		v3d->queue[V3D_RENDER].active_job = NULL;
 		return NULL;
 	}
 
-	v3d->render_job = job;
+	v3d->queue[V3D_RENDER].active_job = &job->base;
 
 	/* Can we avoid this flush?  We need to be careful of
 	 * scheduling, though -- imagine job0 rendering to texture and
@@ -338,11 +338,11 @@ v3d_tfu_job_run(struct drm_sched_job *sched_job)
 	struct dma_fence *fence;
 
 	if (unlikely(job->base.base.s_fence->finished.error)) {
-		v3d->tfu_job = NULL;
+		v3d->queue[V3D_TFU].active_job = NULL;
 		return NULL;
 	}
 
-	v3d->tfu_job = job;
+	v3d->queue[V3D_TFU].active_job = &job->base;
 
 	fence = v3d_fence_create(v3d, V3D_TFU);
 	if (IS_ERR(fence))
@@ -386,11 +386,11 @@ v3d_csd_job_run(struct drm_sched_job *sched_job)
 	int i, csd_cfg0_reg;
 
 	if (unlikely(job->base.base.s_fence->finished.error)) {
-		v3d->csd_job = NULL;
+		v3d->queue[V3D_CSD].active_job = NULL;
 		return NULL;
 	}
 
-	v3d->csd_job = job;
+	v3d->queue[V3D_CSD].active_job = &job->base;
 
 	v3d_invalidate_caches(v3d);