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

[Jeff Johnson]

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@xxxxxxxxxxx>
> ---
>   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?


> +	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;
>