Am 2021-01-27 um 7:33 a.m. schrieb Qu Huang:
> Amdgpu driver uses 4-byte data type as DQM fence memory,
> and transmits GPU address of fence memory to microcode
> through query status PM4 message. However, query status
> PM4 message definition and microcode processing are all
> processed according to 8 bytes. Fence memory only allocates
> 4 bytes of memory, but microcode does write 8 bytes of memory,
> so there is a memory corruption.
Thank you for pointing out that discrepancy. That's a good catch!
I'd prefer to fix this properly by making dqm->fence_addr a u64 pointer.
We should probably also fix up the query_status and
amdkfd_fence_wait_timeout function interfaces to use a 64 bit fence
values everywhere to be consistent.
Regards,
Felix
>
> Signed-off-by: Qu Huang <jin...@126.com>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> index e686ce2..8b38d0c 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -1161,7 +1161,7 @@ static int start_cpsch(struct device_queue_manager *dqm)
> pr_debug("Allocating fence memory\n");
>
> /* allocate fence memory on the gart */
> - retval = kfd_gtt_sa_allocate(dqm->dev, sizeof(*dqm->fence_addr),
> + retval = kfd_gtt_sa_allocate(dqm->dev, sizeof(uint64_t),
> &dqm->fence_mem);
>
> if (retval)
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
