RE: [PATCH 1/1] drm/amdkfd: Use a new capability bit for SRAM ECC

["Russell, Kent" <Kent.Russell@xxxxxxx>]

[AMD Public Use]

Reviewed-by: Kent Russell <kent.russell@xxxxxxx>

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Felix Kuehling
> Sent: Friday, February 26, 2021 5:46 PM
> To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> Subject: [PATCH 1/1] drm/amdkfd: Use a new capability bit for SRAM ECC
> 
> Existing, buggy user mode breaks when SRAM ECC is correctly reported as
> "enabled". To avoid breaking existing user mode, deprecate that bit and
> leave it as 0. Define a new bit to report the actual SRAM ECC mode that
> new, correct user mode can use in the future.
> 
> Fixes: 7ec177bdcfc1 ("drm/amdkfd: fix set kfd node ras properties value")
> Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_topology.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
> b/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
> index 416fd910e12e..b8b68087bd7a 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
> @@ -47,13 +47,14 @@
>  #define HSA_CAP_DOORBELL_TYPE_2_0		0x2
>  #define HSA_CAP_AQL_QUEUE_DOUBLE_MAP		0x00004000
> 
> -#define HSA_CAP_SRAM_EDCSUPPORTED		0x00080000
> +#define HSA_CAP_RESERVED_WAS_SRAM_EDCSUPPORTED	0x00080000 /* Old buggy
> user mode depends on this being 0 */
>  #define HSA_CAP_MEM_EDCSUPPORTED		0x00100000
>  #define HSA_CAP_RASEVENTNOTIFY			0x00200000
>  #define HSA_CAP_ASIC_REVISION_MASK		0x03c00000
>  #define HSA_CAP_ASIC_REVISION_SHIFT		22
> +#define HSA_CAP_SRAM_EDCSUPPORTED		0x04000000
> 
> -#define HSA_CAP_RESERVED			0xfc078000
> +#define HSA_CAP_RESERVED			0xf80f8000
> 
>  struct kfd_node_properties {
>  	uint64_t hive_id;
> --
> 2.30.0
> 
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