From: Mukul Joshi Date: Tue, 25 Apr 2023 18:13:36 +0000 (-0400) Subject: drm/amdgpu: Set GTT size equal to TTM mem limit X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f1f6f48a338cdab96efef712dbef6b1e279583e2;p=linux.git drm/amdgpu: Set GTT size equal to TTM mem limit Use the helper function in TTM to get TTM mem limit and set GTT size to be equal to TTL mem limit. Signed-off-by: Mukul Joshi Reviewed-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 02b827785e399..957b18bda4a79 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -244,7 +244,6 @@ extern int amdgpu_sg_display; #define AMDGPU_VM_MAX_NUM_CTX 4096 #define AMDGPU_SG_THRESHOLD (256*1024*1024) -#define AMDGPU_DEFAULT_GTT_SIZE_MB 3072ULL /* 3GB by default */ #define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000 #define AMDGPU_MAX_USEC_TIMEOUT 100000 /* 100 ms */ #define AMDGPU_FENCE_JIFFIES_TIMEOUT (HZ / 2) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 2cd081cbf7062..f61f07575f63b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1803,26 +1803,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) DRM_INFO("amdgpu: %uM of VRAM memory ready\n", (unsigned) (adev->gmc.real_vram_size / (1024 * 1024))); - /* Compute GTT size, either based on 1/2 the size of RAM size - * or whatever the user passed on module init */ - if (amdgpu_gtt_size == -1) { - struct sysinfo si; - - si_meminfo(&si); - /* Certain GL unit tests for large textures can cause problems - * with the OOM killer since there is no way to link this memory - * to a process. This was originally mitigated (but not necessarily - * eliminated) by limiting the GTT size. The problem is this limit - * is often too low for many modern games so just make the limit 1/2 - * of system memory which aligns with TTM. The OOM accounting needs - * to be addressed, but we shouldn't prevent common 3D applications - * from being usable just to potentially mitigate that corner case. - */ - gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20), - (u64)si.totalram * si.mem_unit / 2); - } else { + /* Compute GTT size, either based on TTM limit + * or whatever the user passed on module init. + */ + if (amdgpu_gtt_size == -1) + gtt_size = ttm_tt_pages_limit() << PAGE_SHIFT; + else gtt_size = (uint64_t)amdgpu_gtt_size << 20; - } /* Initialize GTT memory pool */ r = amdgpu_gtt_mgr_init(adev, gtt_size);