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From 988bca4ee4732bc663f3d6cb71893a8fa480b904 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Thu, 20 Jul 2017 20:50:00 -0400
Subject: [PATCH 0845/4131] drm/amdgpu: Scale GTT size with system memory size
This is the new limit for system memory allocation size. For compute
apps we want to use all system memory, so scale GTT size with system
memory size.
Change-Id: Icec07008e445c60b3db0962c3c67b192d2e577b6
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 9ae5fda..d2431cc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1454,10 +1454,14 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
(unsigned) (adev->mc.real_vram_size / (1024 * 1024)));
- if (amdgpu_gtt_size == -1)
- gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
- adev->mc.mc_vram_size);
- else
+ if (amdgpu_gtt_size == -1) {
+ struct sysinfo si;
+
+ si_meminfo(&si);
+ gtt_size = max3((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
+ adev->mc.mc_vram_size,
+ ((uint64_t)si.totalram * si.mem_unit));
+ } else
gtt_size = (uint64_t)amdgpu_gtt_size << 20;
/* reserve for DGMA import domain */
--
2.7.4
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