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From b795b8498211c7933b0e9fbd099fa0f8dd2b4e52 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 30 Aug 2018 09:31:56 -0500
Subject: [PATCH 5241/5725] drm/amdgpu/gmc9: rework stolen vga memory handling
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
No functional change, just rework it in order to adjust the
behavior on a per asic level. The problem is that on vega10,
something corrupts the lower 8 MB of vram on the second
resume from S3. This does not seem to affect Raven, other
gmc9 based asics need testing.
Change-Id: Ib82827aa5a48ee5829b870d98ae3b733ca822e9a
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 48 +++++++++++++++++++++--------------
1 file changed, 29 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 2ee8a84..25c33e8 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -691,6 +691,28 @@ static int gmc_v9_0_ecc_available(struct amdgpu_device *adev)
return lost_sheep == 0;
}
+static bool gmc_v9_0_keep_stolen_memory(struct amdgpu_device *adev)
+{
+
+ /*
+ * TODO:
+ * Currently there is a bug where some memory client outside
+ * of the driver writes to first 8M of VRAM on S3 resume,
+ * this overrides GART which by default gets placed in first 8M and
+ * causes VM_FAULTS once GTT is accessed.
+ * Keep the stolen memory reservation until the while this is not solved.
+ * Also check code in gmc_v9_0_get_vbios_fb_size and gmc_v9_0_late_init
+ */
+ switch (adev->asic_type) {
+ case CHIP_RAVEN:
+ case CHIP_VEGA10:
+ case CHIP_VEGA12:
+ case CHIP_VEGA20:
+ default:
+ return true;
+ }
+}
+
static int gmc_v9_0_late_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -707,10 +729,8 @@ static int gmc_v9_0_late_init(void *handle)
unsigned i;
int r;
- /*
- * TODO - Uncomment once GART corruption issue is fixed.
- */
- /* amdgpu_bo_late_init(adev); */
+ if (!gmc_v9_0_keep_stolen_memory(adev))
+ amdgpu_bo_late_init(adev);
for(i = 0; i < adev->num_rings; ++i) {
struct amdgpu_ring *ring = adev->rings[i];
@@ -848,18 +868,16 @@ static int gmc_v9_0_gart_init(struct amdgpu_device *adev)
static unsigned gmc_v9_0_get_vbios_fb_size(struct amdgpu_device *adev)
{
-#if 0
u32 d1vga_control = RREG32_SOC15(DCE, 0, mmD1VGA_CONTROL);
-#endif
unsigned size;
/*
* TODO Remove once GART corruption is resolved
* Check related code in gmc_v9_0_sw_fini
* */
- size = 9 * 1024 * 1024;
+ if (gmc_v9_0_keep_stolen_memory(adev))
+ return 9 * 1024 * 1024;
-#if 0
if (REG_GET_FIELD(d1vga_control, D1VGA_CONTROL, D1VGA_MODE_ENABLE)) {
size = 9 * 1024 * 1024; /* reserve 8MB for vga emulator and 1 MB for FB */
} else {
@@ -876,6 +894,7 @@ static unsigned gmc_v9_0_get_vbios_fb_size(struct amdgpu_device *adev)
break;
case CHIP_VEGA10:
case CHIP_VEGA12:
+ case CHIP_VEGA20:
default:
viewport = RREG32_SOC15(DCE, 0, mmSCL0_VIEWPORT_SIZE);
size = (REG_GET_FIELD(viewport, SCL0_VIEWPORT_SIZE, VIEWPORT_HEIGHT) *
@@ -888,7 +907,6 @@ static unsigned gmc_v9_0_get_vbios_fb_size(struct amdgpu_device *adev)
if ((adev->gmc.real_vram_size - size) < (8 * 1024 * 1024))
return 0;
-#endif
return size;
}
@@ -1013,16 +1031,8 @@ static int gmc_v9_0_sw_fini(void *handle)
amdgpu_vm_manager_fini(adev);
gmc_v9_0_gart_fini(adev);
- /*
- * TODO:
- * Currently there is a bug where some memory client outside
- * of the driver writes to first 8M of VRAM on S3 resume,
- * this overrides GART which by default gets placed in first 8M and
- * causes VM_FAULTS once GTT is accessed.
- * Keep the stolen memory reservation until the while this is not solved.
- * Also check code in gmc_v9_0_get_vbios_fb_size and gmc_v9_0_late_init
- */
- amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, NULL);
+ if (gmc_v9_0_keep_stolen_memory(adev))
+ amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, NULL);
amdgpu_bo_fini(adev);
--
2.7.4
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