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From 3d01b50aca2efb3e89c4412d7f1f390c423681f3 Mon Sep 17 00:00:00 2001
From: Yong Zhao <yong.zhao@amd.com>
Date: Mon, 14 May 2018 12:19:22 -0400
Subject: [PATCH 4493/5725] drm/amdkfd: Change the control stack mtype from UC
 to NC on GFX9

Due to a HW bug on GFX9, the mtype of control stack buffers, which are
allocated in mqd BOs on VMID 0 gart and are one page offset from mqd
starting addresses, should be set to NC rather than the default gart
mtype UC.

Fix: KFD-381

Change-Id: I865756efb038512ecb5d4071b2e3d3784db5d4ff
Signed-off-by: Yong Zhao <yong.zhao@amd.com>
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c      | 7 ++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h      | 2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_device.c         | 3 ++-
 drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c | 2 +-
 drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 2 +-
 5 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
index 99ef4ee..6a5d236 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
@@ -278,7 +278,7 @@ u32 pool_to_domain(enum kgd_memory_pool p)
 
 int alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
 			void **mem_obj, uint64_t *gpu_addr,
-			void **cpu_ptr)
+			void **cpu_ptr, bool mqd_gfx9)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
 	struct amdgpu_bo *bo = NULL;
@@ -294,7 +294,12 @@ int alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
 	bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = NULL;
+
+	if (mqd_gfx9)
+		bp.flags |= AMDGPU_GEM_CREATE_MQD_GFX9;
+	
 	r = amdgpu_bo_create(adev, &bp, &bo);	
+
 	if (r) {
 		dev_err(adev->dev,
 			"failed to allocate BO for amdkfd (%d)\n", r);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index 5c785ac..c7116f6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -137,7 +137,7 @@ void amdgpu_amdkfd_gpu_reset(struct kgd_dev *kgd);
 /* Shared API */
 int alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
 			void **mem_obj, uint64_t *gpu_addr,
-			void **cpu_ptr);
+			void **cpu_ptr, bool mqd_gfx9);
 void free_gtt_mem(struct kgd_dev *kgd, void *mem_obj);
 void get_local_mem_info(struct kgd_dev *kgd,
 			struct kfd_local_mem_info *mem_info);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 8fb7580..4ae2b07 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -462,7 +462,8 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
 
 	if (kfd->kfd2kgd->init_gtt_mem_allocation(
 			kfd->kgd, size, &kfd->gtt_mem,
-			&kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr)){
+			&kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr,
+			false)) {
 		dev_err(kfd_device, "Could not allocate %d bytes\n", size);
 		goto out;
 	}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
index cc2c3fb..58ea1fe 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
@@ -115,7 +115,7 @@ static int init_mqd(struct mqd_manager *mm, void **mqd,
 				ALIGN(sizeof(struct v9_mqd), PAGE_SIZE),
 			&((*mqd_mem_obj)->gtt_mem),
 			&((*mqd_mem_obj)->gpu_addr),
-			(void *)&((*mqd_mem_obj)->cpu_ptr));
+			(void *)&((*mqd_mem_obj)->cpu_ptr), true);
 	} else
 		retval = kfd_gtt_sa_allocate(mm->dev, sizeof(struct v9_mqd),
 				mqd_mem_obj);
diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
index dd0b3c7..d26bba5 100644
--- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
+++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
@@ -255,7 +255,7 @@ struct tile_config {
 struct kfd2kgd_calls {
 	int (*init_gtt_mem_allocation)(struct kgd_dev *kgd, size_t size,
 					void **mem_obj, uint64_t *gpu_addr,
-					void **cpu_ptr);
+					void **cpu_ptr, bool mqd_gfx9);
 
 	void (*free_gtt_mem)(struct kgd_dev *kgd, void *mem_obj);
 
-- 
2.7.4