linux-kernel - Re: [PATCH V1] accel/amdxdna: Fix incorrect PSP firmware size

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Message-ID: <a8489ed6-8f88-eef2-b487-61f84d3b0957@amd.com>
Date: Mon, 9 Jun 2025 07:27:18 -0700
From: Lizhi Hou <lizhi.hou@....com>
To: Alex Deucher <alexdeucher@...il.com>
CC: <ogabbay@...nel.org>, <quic_jhugo@...cinc.com>,
	<jacek.lawrynowicz@...ux.intel.com>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <max.zhen@....com>, <min.ma@....com>,
	<sonal.santan@....com>, <mario.limonciello@....com>
Subject: Re: [PATCH V1] accel/amdxdna: Fix incorrect PSP firmware size

Pushed to drm-misc-fixes

On 6/9/25 06:35, Alex Deucher wrote:
> On Wed, Jun 4, 2025 at 8:12 PM Lizhi Hou <lizhi.hou@....com> wrote:
>>
>> On 6/4/25 07:51, Alex Deucher wrote:
>>> On Wed, Jun 4, 2025 at 10:42 AM Lizhi Hou <lizhi.hou@....com> wrote:
>>>> The incorrect PSP firmware size is used for initializing. It may
>>>> cause error for newer version firmware.
>>>>
>>>> Fixes: 8c9ff1b181ba ("accel/amdxdna: Add a new driver for AMD AI Engine")
>>>> Signed-off-by: Lizhi Hou <lizhi.hou@....com>
>>>> ---
>>>>    drivers/accel/amdxdna/aie2_psp.c | 4 ++--
>>>>    1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/accel/amdxdna/aie2_psp.c b/drivers/accel/amdxdna/aie2_psp.c
>>>> index dc3a072ce3b6..f28a060a8810 100644
>>>> --- a/drivers/accel/amdxdna/aie2_psp.c
>>>> +++ b/drivers/accel/amdxdna/aie2_psp.c
>>>> @@ -126,8 +126,8 @@ struct psp_device *aie2m_psp_create(struct drm_device *ddev, struct psp_config *
>>>>           psp->ddev = ddev;
>>>>           memcpy(psp->psp_regs, conf->psp_regs, sizeof(psp->psp_regs));
>>>>
>>>> -       psp->fw_buf_sz = ALIGN(conf->fw_size, PSP_FW_ALIGN) + PSP_FW_ALIGN;
>>>> -       psp->fw_buffer = drmm_kmalloc(ddev, psp->fw_buf_sz, GFP_KERNEL);
>>>> +       psp->fw_buf_sz = ALIGN(conf->fw_size, PSP_FW_ALIGN);
>>>> +       psp->fw_buffer = drmm_kmalloc(ddev, psp->fw_buf_sz + PSP_FW_ALIGN, GFP_KERNEL);
>>> Why do you need the extra PSP_FW_ALIGN in the allocation?
>> The start address of the firmware is also required to be PSP_FW_ALIGN
>> aligned.
> Acked-by: Alex Deucher <alexander.deucher@....com>
>
>>
>> Thanks,
>>
>> Lizhi
>>
>>> Alex
>>>
>>>>           if (!psp->fw_buffer) {
>>>>                   drm_err(ddev, "no memory for fw buffer");
>>>>                   return NULL;
>>>> --
>>>> 2.34.1
>>>>