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-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0913-drm-amdgpu-Account-for-shadow-PTs-in-mapping-update-.patch41
1 files changed, 41 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0913-drm-amdgpu-Account-for-shadow-PTs-in-mapping-update-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0913-drm-amdgpu-Account-for-shadow-PTs-in-mapping-update-.patch
new file mode 100644
index 00000000..90ae2f43
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0913-drm-amdgpu-Account-for-shadow-PTs-in-mapping-update-.patch
@@ -0,0 +1,41 @@
+From 5f7db09fea3a1ec2af9c15e7cb4b4d6a683a08ea Mon Sep 17 00:00:00 2001
+From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
+Date: Thu, 7 Sep 2017 13:23:21 +0200
+Subject: [PATCH 0913/4131] drm/amdgpu: Account for shadow PTs in mapping
+ update IB size.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+When amdgpu_vm_frag_ptes calls amdgpu_vm_update_ptes and the pt
+has a shadow PT we mirror all the write to the shadow PT too, which
+results in twice the commands.
+
+Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
+Reviewed-by: Christian K├Ânig <christian.koenig@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+index 0c1cbb9..efa8136 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+@@ -1536,10 +1536,12 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
+ nptes = last - start + 1;
+
+ /*
+- * reserve space for one command every (1 << BLOCK_SIZE)
++ * reserve space for two commands every (1 << BLOCK_SIZE)
+ * entries or 2k dwords (whatever is smaller)
++ *
++ * The second command is for the shadow pagetables.
+ */
+- ncmds = (nptes >> min(adev->vm_manager.block_size, 11u)) + 1;
++ ncmds = ((nptes >> min(adev->vm_manager.block_size, 11u)) + 1) * 2;
+
+ /* padding, etc. */
+ ndw = 64;
+--
+2.7.4
+