This is a note to let you know that I've just added the patch titled
drm/amdgpu: Properly allocate VM invalidate eng v2
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdgpu-properly-allocate-vm-invalidate-eng-v2.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c5066129af4436ab0da8eefe4289774a5409706d Mon Sep 17 00:00:00 2001
From: ozeng <oak.zeng@xxxxxxx>
Date: Tue, 6 Jun 2017 10:53:28 -0500
Subject: drm/amdgpu: Properly allocate VM invalidate eng v2
From: ozeng <oak.zeng@xxxxxxx>
commit c5066129af4436ab0da8eefe4289774a5409706d upstream.
v1: Properly allocate TLB invalidation engine to avoid conflict.
v2: Added comments to codes
Signed-off-by: Oak Zeng <Oak.Zeng@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Acked-by: Christian Konig <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -395,7 +395,16 @@ static int gmc_v9_0_early_init(void *han
static int gmc_v9_0_late_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
- unsigned vm_inv_eng[AMDGPU_MAX_VMHUBS] = { 3, 3 };
+ /*
+ * The latest engine allocation on gfx9 is:
+ * Engine 0, 1: idle
+ * Engine 2, 3: firmware
+ * Engine 4~13: amdgpu ring, subject to change when ring number changes
+ * Engine 14~15: idle
+ * Engine 16: kfd tlb invalidation
+ * Engine 17: Gart flushes
+ */
+ unsigned vm_inv_eng[AMDGPU_MAX_VMHUBS] = { 4, 4 };
unsigned i;
for(i = 0; i < adev->num_rings; ++i) {
@@ -408,9 +417,9 @@ static int gmc_v9_0_late_init(void *hand
ring->funcs->vmhub);
}
- /* Engine 17 is used for GART flushes */
+ /* Engine 16 is used for KFD and 17 for GART flushes */
for(i = 0; i < AMDGPU_MAX_VMHUBS; ++i)
- BUG_ON(vm_inv_eng[i] > 17);
+ BUG_ON(vm_inv_eng[i] > 16);
return amdgpu_irq_get(adev, &adev->mc.vm_fault, 0);
}
Patches currently in stable-queue which might be from oak.zeng@xxxxxxx are
queue-4.14/drm-amdgpu-properly-allocate-vm-invalidate-eng-v2.patch