[PATCH v3 18/24] drm/amdkfd: enable pc sampling stop

[James Zhu]

Enable pc sampling stop.

Signed-off-by: James Zhu <James.Zhu at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c | 28 +++++++++++++++++---
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h        |  4 +++
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c b/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c
index 07e4c4a32e7b..02fa481d7457 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c
@@ -88,10 +88,32 @@ static int kfd_pc_sample_start(struct kfd_process_device *pdd)
 	return -EINVAL;
 }
 
-static int kfd_pc_sample_stop(struct kfd_process_device *pdd)
+static int kfd_pc_sample_stop(struct kfd_process_device *pdd,
+					struct pc_sampling_entry *pcs_entry)
 {
-	return -EINVAL;
+	bool pc_sampling_stop = false;
+
+	pcs_entry->enabled = false;
+	mutex_lock(&pdd->dev->pcs_data.mutex);
+	pdd->dev->pcs_data.hosttrap_entry.base.active_count--;
+	if (!pdd->dev->pcs_data.hosttrap_entry.base.active_count) {
+		WRITE_ONCE(pdd->dev->pcs_data.hosttrap_entry.base.stop_enable, true);
+		pc_sampling_stop = true;
+	}
+	mutex_unlock(&pdd->dev->pcs_data.mutex);
 
+	if (pc_sampling_stop) {
+		kfd_process_set_trap_pc_sampling_flag(&pdd->qpd,
+			pdd->dev->pcs_data.hosttrap_entry.base.pc_sample_info.method, false);
+
+		mutex_lock(&pdd->dev->pcs_data.mutex);
+		pdd->dev->pcs_data.hosttrap_entry.base.target_simd = 0;
+		pdd->dev->pcs_data.hosttrap_entry.base.target_wave_slot = 0;
+		WRITE_ONCE(pdd->dev->pcs_data.hosttrap_entry.base.stop_enable, false);
+		mutex_unlock(&pdd->dev->pcs_data.mutex);
+	}
+
+	return 0;
 }
 
 static int kfd_pc_sample_create(struct kfd_process_device *pdd,
@@ -233,7 +255,7 @@ int kfd_pc_sample(struct kfd_process_device *pdd,
 		if (!pcs_entry->enabled)
 			return -EALREADY;
 		else
-			return kfd_pc_sample_stop(pdd);
+			return kfd_pc_sample_stop(pdd, pcs_entry);
 	}
 
 	return -EINVAL;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index b9a36891d099..0839a0ca3099 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -271,6 +271,10 @@ struct kfd_dev;
 
 struct kfd_dev_pc_sampling_data {
 	uint32_t use_count;         /* Num of PC sampling sessions */
+	uint32_t active_count;      /* Num of active sessions */
+	uint32_t target_simd;       /* target simd for trap */
+	uint32_t target_wave_slot;  /* target wave slot for trap */
+	bool stop_enable;           /* pc sampling stop in process */
 	struct idr pc_sampling_idr;
 	struct kfd_pc_sample_info pc_sample_info;
 };
-- 
2.25.1