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From 43402c9acb4f14c7cd3eb225e126ddc57b37a09e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Thu, 23 Nov 2017 11:16:05 +0100
Subject: [PATCH 2795/4131] drm/amdgpu: choose number of VM levels based on VM
size
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This allows us limiting the VM size for testing even of Vega10.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index a58937b..1b13d997 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2619,12 +2619,17 @@ static uint32_t amdgpu_vm_get_block_size(uint64_t vm_size)
void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t vm_size,
uint32_t fragment_size_default, unsigned max_level)
{
- /* adjust vm size first, but only for two level setups for now */
- if (amdgpu_vm_size != -1 && max_level == 1)
+ uint64_t tmp;
+
+ /* adjust vm size first */
+ if (amdgpu_vm_size != -1)
vm_size = amdgpu_vm_size;
adev->vm_manager.max_pfn = (uint64_t)vm_size << 18;
- adev->vm_manager.num_level = max_level;
+
+ tmp = roundup_pow_of_two(adev->vm_manager.max_pfn);
+ tmp = DIV_ROUND_UP(fls64(tmp) - 1, 9) - 1;
+ adev->vm_manager.num_level = min(max_level, (unsigned)tmp);
/* block size depends on vm size and hw setup*/
if (adev->vm_manager.num_level > 1)
@@ -2641,8 +2646,9 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t vm_size,
else
adev->vm_manager.fragment_size = amdgpu_vm_fragment_size;
- DRM_INFO("vm size is %u GB, block size is %u-bit, fragment size is %u-bit\n",
- vm_size, adev->vm_manager.block_size,
+ DRM_INFO("vm size is %u GB, %u levels, block size is %u-bit, fragment size is %u-bit\n",
+ vm_size, adev->vm_manager.num_level + 1,
+ adev->vm_manager.block_size,
adev->vm_manager.fragment_size);
}
--
2.7.4
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