linux-kernel - Re: [PATCH v3 1/3] venus: add firmware version based check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 4 May 2023 15:19:20 +0530
From:   Dikshita Agarwal <quic_dikshita@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        <linux-media@...r.kernel.org>, <stanimir.k.varbanov@...il.com>,
        <quic_vgarodia@...cinc.com>, <agross@...nel.org>,
        <andersson@...nel.org>, <mchehab@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        "Viswanath Boma" <quic_vboma@...cinc.com>
Subject: Re: [PATCH v3 1/3] venus: add firmware version based check


On 5/4/2023 3:12 PM, Konrad Dybcio wrote:
>
> On 4.05.2023 11:39, Dikshita Agarwal wrote:
>> Add firmware version based checks to enable/disable
>> features for different SOCs.
>>
>> Signed-off-by: Vikash Garodia <quic_vgarodia@...cinc.com>
>> Signed-off-by: Viswanath Boma <quic_vboma@...cinc.com>
>> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
>> Tested-by: Nathan Hebert <nhebert@...omium.org>
>> ---
>>   drivers/media/platform/qcom/venus/core.h     | 20 ++++++++++++++++++++
>>   drivers/media/platform/qcom/venus/hfi_msgs.c | 27 +++++++++++++++++++++++++--
>>   2 files changed, 45 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
>> index 32551c2..2f2176f 100644
>> --- a/drivers/media/platform/qcom/venus/core.h
>> +++ b/drivers/media/platform/qcom/venus/core.h
>> @@ -202,6 +202,11 @@ struct venus_core {
>>   	unsigned int core0_usage_count;
>>   	unsigned int core1_usage_count;
>>   	struct dentry *root;
>> +	struct venus_img_version {
>> +		u32 major;
>> +		u32 minor;
>> +		u32 rev;
>> +	} venus_ver;
>>   };
>>   
>>   struct vdec_controls {
>> @@ -500,4 +505,19 @@ venus_caps_by_codec(struct venus_core *core, u32 codec, u32 domain)
>>   	return NULL;
>>   }
>>   
>> +static inline bool
>> +is_fw_rev_or_newer(struct venus_core *core, u32 vmajor, u32 vminor, u32 vrev)
>> +{
>> +	return ((core)->venus_ver.major == vmajor &&
>> +		(core)->venus_ver.minor == vminor &&
>> +		(core)->venus_ver.rev >= vrev);
>> +}
>> +
>> +static inline bool
>> +is_fw_rev_or_older(struct venus_core *core, u32 vmajor, u32 vminor, u32 vrev)
>> +{
>> +	return ((core)->venus_ver.major == vmajor &&
>> +		(core)->venus_ver.minor == vminor &&
>> +		(core)->venus_ver.rev <= vrev);
>> +}
>>   #endif
>> diff --git a/drivers/media/platform/qcom/venus/hfi_msgs.c b/drivers/media/platform/qcom/venus/hfi_msgs.c
>> index df96db3..4854863 100644
>> --- a/drivers/media/platform/qcom/venus/hfi_msgs.c
>> +++ b/drivers/media/platform/qcom/venus/hfi_msgs.c
>> @@ -248,13 +248,16 @@ static void hfi_sys_init_done(struct venus_core *core, struct venus_inst *inst,
>>   }
>>   
>>   static void
>> -sys_get_prop_image_version(struct device *dev,
>> +sys_get_prop_image_version(struct venus_core *core,
>>   			   struct hfi_msg_sys_property_info_pkt *pkt)
>>   {
>> +	struct device *dev = core->dev;
>>   	u8 *smem_tbl_ptr;
>>   	u8 *img_ver;
>>   	int req_bytes;
>>   	size_t smem_blk_sz;
>> +	int ret;
>> +	u8 *ver_str;
>>   
>>   	req_bytes = pkt->hdr.size - sizeof(*pkt);
>>   
>> @@ -263,6 +266,26 @@ sys_get_prop_image_version(struct device *dev,
>>   		return;
>>   
>>   	img_ver = pkt->data;
>> +	if (IS_V6(core) && core->res->num_vpp_pipes == 1) {
>> +		ret = sscanf(img_ver, "14:video-firmware.%u.%u-%u",
>> +			     &core->venus_ver.major, &core->venus_ver.minor, &core->venus_ver.rev);
> This is still not perfect, 8350 has 4 vpp pipes and its firmware is
> also denominated with "video-firmware".. perhaps we can just try
> each variant until we reach ret == 3?

sc7280 onward firmware have image string as "video-firmware".

Support for 8350 is not yet added in venus driver, any required change 
for the same can be done

when support will be added for the same.

>> +		if (ret != 2) {
> 3?

this image version string doesn't return valid revision hence checking 
against 2 (major and minor versions)

Thanks,

Dikshita

>
> Konrad
>> +			dev_dbg(dev, VDBGL "error reading F/W version\n");
>> +			return;
>> +		}
>> +	} else {
>> +		if (IS_V6(core))
>> +			ver_str = "14:VIDEO.VPU.%u.%u-%u";
>> +		else
>> +			ver_str = "14:VIDEO.VE.%u.%u-%u";
>> +
>> +		ret = sscanf(img_ver, "14:VIDEO.VE.%u.%u-%u",
>> +			     &core->venus_ver.major, &core->venus_ver.minor, &core->venus_ver.rev);
>> +		if (ret != 3) {
>> +			dev_dbg(dev, VDBGL "error reading F/W version\n");
>> +			return;
>> +		}
>> +	}
>>   
>>   	dev_dbg(dev, VDBGL "F/W version: %s\n", img_ver);
>>   
>> @@ -286,7 +309,7 @@ static void hfi_sys_property_info(struct venus_core *core,
>>   
>>   	switch (pkt->property) {
>>   	case HFI_PROPERTY_SYS_IMAGE_VERSION:
>> -		sys_get_prop_image_version(dev, pkt);
>> +		sys_get_prop_image_version(core, pkt);
>>   		break;
>>   	default:
>>   		dev_dbg(dev, VDBGL "unknown property data\n");