[PATCH 3/3] drm/amdgpu: Set lower queue retry timeout for gfx9 family

[Elena Sakhnovitch]

From: Harish Kasiviswanathan <Harish.Kasiviswanathan at amd.com>

Set more optimized queue retry timeout for gfx9 family starting with
arcturus.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan at amd.com>
Signed-off-by: Elena Sakhnovitch <Elena.Sakhnovitch at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.h |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c  |  8 ++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h  |  1 +
 drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c | 14 +++++++++++++-
 drivers/gpu/drm/amd/include/kgd_kfd_interface.h    |  1 +
 6 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c
index 8e72dcff8867..652c695d04e2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c
@@ -1024,6 +1024,7 @@ void kgd_gfx_v10_get_iq_wait_times(struct amdgpu_device *adev,
 void kgd_gfx_v10_build_grace_period_packet_info(struct amdgpu_device *adev,
 						uint32_t wait_times,
 						uint32_t grace_period,
+						uint32_t que_sleep,
 						uint32_t *reg_offset,
 						uint32_t *reg_data)
 {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.h
index 9efd2dd4fdd7..11aedaa8a0b9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.h
@@ -54,6 +54,7 @@ void kgd_gfx_v10_get_iq_wait_times(struct amdgpu_device *adev,
 void kgd_gfx_v10_build_grace_period_packet_info(struct amdgpu_device *adev,
 					       uint32_t wait_times,
 					       uint32_t grace_period,
+					       uint32_t que_sleep,
 					       uint32_t *reg_offset,
 					       uint32_t *reg_data);
 uint64_t kgd_gfx_v10_hqd_get_pq_addr(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
index 04c86a229a23..d93a0285f225 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
@@ -1080,6 +1080,7 @@ void kgd_gfx_v9_get_cu_occupancy(struct amdgpu_device *adev,
 void kgd_gfx_v9_build_grace_period_packet_info(struct amdgpu_device *adev,
 		uint32_t wait_times,
 		uint32_t grace_period,
+		uint32_t que_sleep,
 		uint32_t *reg_offset,
 		uint32_t *reg_data)
 {
@@ -1092,6 +1093,13 @@ void kgd_gfx_v9_build_grace_period_packet_info(struct amdgpu_device *adev,
 				grace_period);
 	}
 
+	if (que_sleep) {
+		*reg_data = REG_SET_FIELD(*reg_data,
+				CP_IQ_WAIT_TIME2,
+				QUE_SLEEP,
+				que_sleep);
+	}
+
 	*reg_offset = SOC15_REG_OFFSET(GC, 0, mmCP_IQ_WAIT_TIME2);
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h
index b6a91a552aa4..3f159d477f5b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h
@@ -100,6 +100,7 @@ void kgd_gfx_v9_get_iq_wait_times(struct amdgpu_device *adev,
 void kgd_gfx_v9_build_grace_period_packet_info(struct amdgpu_device *adev,
 					       uint32_t wait_times,
 					       uint32_t grace_period,
+					       uint32_t que_sleep,
 					       uint32_t *reg_offset,
 					       uint32_t *reg_data);
 uint64_t kgd_gfx_v9_hqd_get_pq_addr(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c
index adc7f7c78a18..4de8106d14ba 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c
@@ -305,6 +305,7 @@ static int pm_set_grace_period_v9(struct packet_manager *pm,
 	struct device_queue_manager *dqm = pm->dqm;
 	uint32_t reg_offset = 0;
 	uint32_t reg_data = 0;
+	uint32_t que_sleep = 0;
 
 	/*
 	 * The CP cannot handle a 0 grace period input and will result in
@@ -319,18 +320,29 @@ static int pm_set_grace_period_v9(struct packet_manager *pm,
 	}
 
 	if (grace_period == SET_ASIC_OPTIMIZED_GRACE_PERIOD) {
+		/* Reduce CP_IQ_WAIT_TIME2.QUE_SLEEP to 0x1 from default 0x40.
+		 * On a 1GHz machine this is roughly 1 microsecond, which is
+		 * about how long it takes to load data out of memory during
+		 * queue connect
+		 * QUE_SLEEP: Wait Count for Dequeue Retry.
+		 */
+		if (KFD_GC_VERSION(dqm->dev) >= IP_VERSION(9, 4, 1) &&
+		    KFD_GC_VERSION(dqm->dev) < IP_VERSION(10, 0, 0))
+			que_sleep = 1;
+
 		/* Set CWSR grace period to 1x1000 cycle for GFX9.4.3 APU */
 		if (amdgpu_emu_mode == 0 && dqm->dev->adev->gmc.is_app_apu &&
 		    KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 3))
 			grace_period = 1;
 		else
-			return 0;
+			grace_period = 0; /* 0 will keep the default value */
 	}
 
 	pm->dqm->dev->kfd2kgd->build_grace_period_packet_info(
 			pm->dqm->dev->adev,
 			pm->dqm->wait_times,
 			grace_period,
+			que_sleep,
 			&reg_offset,
 			&reg_data);
 
diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
index e3e635a31b8a..1ed3fbedf50b 100644
--- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
+++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
@@ -316,6 +316,7 @@ struct kfd2kgd_calls {
 	void (*build_grace_period_packet_info)(struct amdgpu_device *adev,
 			uint32_t wait_times,
 			uint32_t grace_period,
+			uint32_t que_sleep,
 			uint32_t *reg_offset,
 			uint32_t *reg_data);
 	void (*get_cu_occupancy)(struct amdgpu_device *adev,
-- 
2.34.1