[v2] ath11k: add read variant from SMBIOS for download board data

Message ID	20211118100033.8384-1-quic_wgong@quicinc.com (mailing list archive)
State	Accepted
Commit	46e46db313a2bf3c48cac4eb8bdb613b762f301b
Delegated to:	Kalle Valo
Headers	show Return-Path: <linux-wireless-owner@kernel.org> From: Wen Gong <quic_wgong@quicinc.com> To: <ath11k@lists.infradead.org> CC: <linux-wireless@vger.kernel.org>, <quic_wgong@quicinc.com> Subject: [PATCH v2] ath11k: add read variant from SMBIOS for download board data Date: Thu, 18 Nov 2021 05:00:33 -0500 Message-ID: <20211118100033.8384-1-quic_wgong@quicinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk
Series	[v2] ath11k: add read variant from SMBIOS for download board data \| expand [v2] ath11k: add read variant from SMBIOS for download board data

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index a40bbca3e9af..eac5675e0df4 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -8,6 +8,9 @@ #include <linux/remoteproc.h> #include <linux/firmware.h> #include <linux/of.h> +#include <linux/dmi.h> +#include <linux/ctype.h> + #include "core.h" #include "dp_tx.h" #include "dp_rx.h" @@ -379,6 +382,77 @@ int ath11k_core_resume(struct ath11k_base *ab) } EXPORT_SYMBOL(ath11k_core_resume); +static void ath11k_core_check_bdfext(const struct dmi_header *hdr, void *data) +{ + struct ath11k_base *ab = data; + const char *bdf_ext; + const char *magic = ATH11K_SMBIOS_BDF_EXT_MAGIC; + u8 bdf_enabled; + int i; + size_t len; + + if (ab->qmi.target.bdf_ext[0] != '\0') + return; + + if (hdr->type != ATH11K_SMBIOS_BDF_EXT_TYPE) + return; + + if (hdr->length != ATH11K_SMBIOS_BDF_EXT_LENGTH) { + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "wrong smbios bdf ext type length (%d).\n", + hdr->length); + return; + } + + bdf_enabled = *((u8 *)hdr + ATH11K_SMBIOS_BDF_EXT_OFFSET); + if (!bdf_enabled) { + ath11k_dbg(ab, ATH11K_DBG_BOOT, "bdf variant name not found.\n"); + return; + } + + /* Only one string exists (per spec) */ + bdf_ext = (char *)hdr + hdr->length; + + if (memcmp(bdf_ext, magic, strlen(magic)) != 0) { + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "bdf variant magic does not match.\n"); + return; + } + + len = strlen(bdf_ext); + for (i = 0; i < len; i++) { + if (!isascii(bdf_ext[i]) || !isprint(bdf_ext[i])) { + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "bdf variant name contains non ascii chars.\n"); + return; + } + } + + /* Copy extension name without magic prefix */ + if (strscpy(ab->qmi.target.bdf_ext, bdf_ext + strlen(magic), + sizeof(ab->qmi.target.bdf_ext)) < 0) { + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "bdf variant string is longer than the buffer can accommodate (variant: %s)\n", + bdf_ext); + return; + } + + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "found and validated bdf variant smbios_type 0x%x bdf %s\n", + ATH11K_SMBIOS_BDF_EXT_TYPE, bdf_ext); +} + +int ath11k_core_check_smbios(struct ath11k_base *ab) +{ + ab->qmi.target.bdf_ext[0] = '\0'; + dmi_walk(ath11k_core_check_bdfext, ab); + + if (ab->qmi.target.bdf_ext[0] == '\0') + return -ENODATA; + + return 0; +} + int ath11k_core_check_dt(struct ath11k_base *ab) { size_t max_len = sizeof(ab->qmi.target.bdf_ext); diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h index bbfc10fd5c6d..b234514e7138 100644 --- a/drivers/net/wireless/ath/ath11k/core.h +++ b/drivers/net/wireless/ath/ath11k/core.h @@ -952,7 +952,18 @@ int ath11k_core_fetch_bdf(struct ath11k_base *ath11k, struct ath11k_board_data *bd); void ath11k_core_free_bdf(struct ath11k_base *ab, struct ath11k_board_data *bd); int ath11k_core_check_dt(struct ath11k_base *ath11k); +/* SMBIOS type containing Board Data File Name Extension */ +#define ATH11K_SMBIOS_BDF_EXT_TYPE 0xF8 +/* SMBIOS type structure length (excluding strings-set) */ +#define ATH11K_SMBIOS_BDF_EXT_LENGTH 0x9 + +/* Offset pointing to Board Data File Name Extension */ +#define ATH11K_SMBIOS_BDF_EXT_OFFSET 0x8 + +/* The magic used by QCA spec */ +#define ATH11K_SMBIOS_BDF_EXT_MAGIC "BDF_" +int ath11k_core_check_smbios(struct ath11k_base *ab); void ath11k_core_halt(struct ath11k *ar); int ath11k_core_resume(struct ath11k_base *ab); int ath11k_core_suspend(struct ath11k_base *ab); diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c index 25eb22cbeaeb..700a9c137018 100644 --- a/drivers/net/wireless/ath/ath11k/qmi.c +++ b/drivers/net/wireless/ath/ath11k/qmi.c @@ -1991,6 +1991,10 @@ static int ath11k_qmi_request_target_cap(struct ath11k_base *ab) ab->qmi.target.fw_build_timestamp, ab->qmi.target.fw_build_id); + r = ath11k_core_check_smbios(ab); + if (r) + ath11k_dbg(ab, ATH11K_DBG_QMI, "SMBIOS bdf variant name not set.\n"); + r = ath11k_core_check_dt(ab); if (r) ath11k_dbg(ab, ATH11K_DBG_QMI, "DT bdf variant name not set.\n");

[v2] ath11k: add read variant from SMBIOS for download board data

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