linux-kernel - Re: [PATCH] wifi: ath10k: Add WLAN firmware image version info into smem

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Date:   Mon, 31 Oct 2022 12:24:43 +0530
From:   "Youghandhar Chintala (Temp)" <quic_youghand@...cinc.com>
To:     Jeff Johnson <quic_jjohnson@...cinc.com>,
        <ath10k@...ts.infradead.org>
CC:     <linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] wifi: ath10k: Add WLAN firmware image version info into
 smem


On 10/28/2022 12:19 AM, Jeff Johnson wrote:
> On 10/26/2022 3:22 AM, Youghandhar Chintala wrote:
>> In a SoC based solution, it would be useful to know the versions of the
>> various binary firmware blobs the system is running on. On a QCOM based
>> SoC, this info can be obtained from socinfo debugfs infrastructure. For
>> this to work, respective subsystem drivers have to export the firmware
>> version information to an SMEM based version information table.
>>
>> Having firmware version information at one place will help quickly
>> figure out the firmware versions of various subsystems on the device
>> instead of going through builds/logs in an event of a system crash.
>>
>> Fill WLAN firmware version information in SMEM version table to be
>> printed as part of socinfo debugfs infrastructure on a Qualcomm based
>> SoC.
>>
>> This change is applicable only for WCN399X targets.
>>
>> Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.2.2.c10-00754-QCAHLSWMTPL-1
>>
>> Signed-off-by: Youghandhar Chintala <quic_youghand@...cinc.com>
>> ---
>>   drivers/net/wireless/ath/ath10k/qmi.c | 28 +++++++++++++++++++++++++++
>>   1 file changed, 28 insertions(+)
>>
>> diff --git a/drivers/net/wireless/ath/ath10k/qmi.c 
>> b/drivers/net/wireless/ath/ath10k/qmi.c
>> index 66cb7a1e628a..e88bcfd96859 100644
>> --- a/drivers/net/wireless/ath/ath10k/qmi.c
>> +++ b/drivers/net/wireless/ath/ath10k/qmi.c
>> @@ -14,6 +14,7 @@
>>   #include <linux/net.h>
>>   #include <linux/platform_device.h>
>>   #include <linux/qcom_scm.h>
>> +#include <linux/soc/qcom/smem.h>
>>   #include <linux/string.h>
>>   #include <net/sock.h>
>>   @@ -22,6 +23,8 @@
>>     #define ATH10K_QMI_CLIENT_ID        0x4b4e454c
>>   #define ATH10K_QMI_TIMEOUT        30
>> +#define ATH10K_SMEM_IMAGE_VERSION_TABLE       469
>> +#define ATH10K_SMEM_IMAGE_TABLE_CNSS_INDEX     13
>>     static int ath10k_qmi_map_msa_permission(struct ath10k_qmi *qmi,
>>                        struct ath10k_msa_mem_info *mem_info)
>> @@ -536,6 +539,29 @@ int ath10k_qmi_wlan_disable(struct ath10k *ar)
>>       return ath10k_qmi_mode_send_sync_msg(ar, QMI_WLFW_OFF_V01);
>>   }
>>   +static void ath10k_qmi_add_wlan_ver_smem(struct ath10k *ar, char 
>> *fw_build_id)
>
> const char *fw_build_id?
>
>> +{
>> +    u8 *smem_table_ptr;
>> +    size_t smem_block_size;
>> +    const u32 version_string_size = 128;
>
> should you s/128/MAX_BUILD_ID_LEN/ since that is what is used to size 
> qmi->fw_build_id?
>
> or alternately have the caller pass fw_build_id length as a separate 
> param?
>   Sure Jeff. Will address it in next version of patch.
>
>> +    const u32 smem_img_idx_wlan = ATH10K_SMEM_IMAGE_TABLE_CNSS_INDEX 
>> * 128;
>> +
>> +    smem_table_ptr = qcom_smem_get(QCOM_SMEM_HOST_ANY,
>> +                       ATH10K_SMEM_IMAGE_VERSION_TABLE,
>> +                       &smem_block_size);
>> +    if (IS_ERR(smem_table_ptr)) {
>> +        ath10k_dbg(ar, ATH10K_DBG_QMI, "smem image version table not 
>> found");
>> +        return;
>> +    }
>> +    if (smem_img_idx_wlan + version_string_size > smem_block_size) {
>> +        ath10k_dbg(ar, ATH10K_DBG_QMI, "smem block size too small: %i",
>> +               smem_block_size);
>> +        return;
>> +    }
>> +    memcpy(smem_table_ptr + smem_img_idx_wlan, fw_build_id,
>> +           version_string_size);
>> +}
>> +
>>   static int ath10k_qmi_cap_send_sync_msg(struct ath10k_qmi *qmi)
>>   {
>>       struct wlfw_cap_resp_msg_v01 *resp;
>> @@ -606,6 +632,8 @@ static int ath10k_qmi_cap_send_sync_msg(struct 
>> ath10k_qmi *qmi)
>>                   qmi->fw_version, qmi->fw_build_timestamp, 
>> qmi->fw_build_id);
>>       }
>>   +    ath10k_qmi_add_wlan_ver_smem(ar, qmi->fw_build_id);
>> +
>>       kfree(resp);
>>       return 0;
>