linux-kernel - Re: [PATCH V3 05/11] accel/amdxdna: Add hardware context

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Message-ID: <8347abb4-7c9a-416c-4837-29e78fd715f0@amd.com>
Date: Sun, 6 Oct 2024 22:02:53 -0700
From: Lizhi Hou <lizhi.hou@....com>
To: Jeffrey Hugo <quic_jhugo@...cinc.com>, <ogabbay@...nel.org>,
	<dri-devel@...ts.freedesktop.org>
CC: <linux-kernel@...r.kernel.org>, <min.ma@....com>, <max.zhen@....com>,
	<sonal.santan@....com>, <king.tam@....com>
Subject: Re: [PATCH V3 05/11] accel/amdxdna: Add hardware context


On 10/4/24 10:50, Jeffrey Hugo wrote:
> On 9/11/2024 12:05 PM, Lizhi Hou wrote:
>> diff --git a/drivers/accel/amdxdna/aie2_ctx.c 
>> b/drivers/accel/amdxdna/aie2_ctx.c
>> new file mode 100644
>> index 000000000000..52a71661f887
>> --- /dev/null
>> +++ b/drivers/accel/amdxdna/aie2_ctx.c
>> @@ -0,0 +1,186 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2024, Advanced Micro Devices, Inc.
>> + */
>> +
>> +#include <drm/amdxdna_accel.h>
>> +#include <drm/drm_device.h>
>> +#include <drm/drm_print.h>
>> +#include <linux/types.h>
>> +
>> +#include "amdxdna_ctx.h"
>> +#include "amdxdna_mailbox.h"
>> +#include "amdxdna_pci_drv.h"
>> +#include "aie2_pci.h"
>> +#include "aie2_solver.h"
>
> Alphabetical order?
>
> <snip>
>> +/**
>> + * struct amdxdna_drm_create_hwctx - Create hardware context.
>> + * @ext: MBZ.
>> + * @ext_flags: MBZ.
>> + * @qos_p: Address of QoS info.
>> + * @umq_bo: BO handle for user mode queue(UMQ).
>> + * @log_buf_bo: BO handle for log buffer.
>> + * @max_opc: Maximum operations per cycle.
>> + * @num_tiles: Number of AIE tiles.
>> + * @mem_size: Size of AIE tile memory.
>> + * @umq_doorbell: Returned offset of doorbell associated with UMQ.
>> + * @handle: Returned hardware context handle.
>> + * @pad: MBZ.
>
> You specify must be zero, but I don't see that checked anywhere.

Ok. I did not see any driver checks structure pad. And pad should not be 
used. I will remove MBZ for pad.


Thanks,

Lizhi

>
>> + */
>> +struct amdxdna_drm_create_hwctx {
>> +    __u64 ext;
>> +    __u64 ext_flags;
>> +    __u64 qos_p;
>> +    __u32 umq_bo;
>> +    __u32 log_buf_bo;
>> +    __u32 max_opc;
>> +    __u32 num_tiles;
>> +    __u32 mem_size;
>> +    __u32 umq_doorbell;
>> +    __u32 handle;
>> +    __u32 pad;
>> +};