From patchwork Thu Jul 6 11:12:57 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shrirang Bagul X-Patchwork-Id: 785125 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 3x3FTs2SKRz9s4s; Thu, 6 Jul 2017 21:13:21 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1dT4ik-0000Hp-83; Thu, 06 Jul 2017 11:13:18 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1dT4ic-0000FM-Ja for kernel-team@lists.ubuntu.com; Thu, 06 Jul 2017 11:13:10 +0000 Received: from 1.general.shrirang--bagul.uk.vpn ([10.172.198.4] helo=snb-ubuntu.taipei) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1dT4ib-0003Eo-Pd for kernel-team@lists.ubuntu.com; Thu, 06 Jul 2017 11:13:10 +0000 From: Shrirang Bagul To: kernel-team@lists.ubuntu.com Subject: [Zesty][PATCH v2] ath10k: search SMBIOS for OEM board file extension Date: Thu, 6 Jul 2017 19:12:57 +0800 Message-Id: <20170706111257.17188-4-shrirang.bagul@canonical.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170706111257.17188-1-shrirang.bagul@canonical.com> References: <20170706111257.17188-1-shrirang.bagul@canonical.com> X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com From: Waldemar Rymarkiewicz BugLink: https://bugs.launchpad.net/bugs/1666742 Board Data File (BDF) is loaded upon driver boot-up procedure. The right board data file is identified, among others, by device and sybsystem ids. The problem, however, can occur when the (default) board data file cannot fulfill with the vendor requirements and it is necessary to use a different board data file. To solve the issue QCA uses SMBIOS type 0xF8 to store Board Data File Name Extension to specify the extension/variant name. The driver will take the extension suffix into consideration and will load the right (non-default) board data file if necessary. If it is unnecessary to use extension board data file, please leave the SMBIOS field blank and default configuration will be used. Example: If a default board data file for a specific board is identified by a string "bus=pci,vendor=168c,device=003e,subsystem-vendor=1028, subsystem-device=0310" then the OEM specific data file, if used, could be identified by variant suffix: "bus=pci,vendor=168c,device=003e,subsystem-vendor=1028, subsystem-device=0310,variant=DE_1AB" If board data file name extension is set but board-2.bin does not contain board data file for the variant, the driver will fallback to the default board data file not to break backward compatibility. This was first applied in commit f2593cb1b291 ("ath10k: Search SMBIOS for OEM board file extension") but later reverted in commit 005c3490e9db ("Revert "ath10k: Search SMBIOS for OEM board file extension"". This patch is now otherwise the same as commit f2593cb1b291 except the regression fixed. Signed-off-by: Waldemar Rymarkiewicz Signed-off-by: Kalle Valo (cherry picked from commit 1657b8f84ed9fc1d2a100671f1d42d6286f20073) Signed-off-by: Shrirang Bagul --- drivers/net/wireless/ath/ath10k/core.c | 101 ++++++++++++++++++++++++++++++++- drivers/net/wireless/ath/ath10k/core.h | 19 +++++++ 2 files changed, 117 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 01f5d4db4d0e..2ff689fe6d00 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -18,6 +18,8 @@ #include #include #include +#include +#include #include #include "core.h" @@ -704,6 +706,72 @@ static int ath10k_core_get_board_id_from_otp(struct ath10k *ar) return 0; } +static void ath10k_core_check_bdfext(const struct dmi_header *hdr, void *data) +{ + struct ath10k *ar = data; + const char *bdf_ext; + const char *magic = ATH10K_SMBIOS_BDF_EXT_MAGIC; + u8 bdf_enabled; + int i; + + if (hdr->type != ATH10K_SMBIOS_BDF_EXT_TYPE) + return; + + if (hdr->length != ATH10K_SMBIOS_BDF_EXT_LENGTH) { + ath10k_dbg(ar, ATH10K_DBG_BOOT, + "wrong smbios bdf ext type length (%d).\n", + hdr->length); + return; + } + + bdf_enabled = *((u8 *)hdr + ATH10K_SMBIOS_BDF_EXT_OFFSET); + if (!bdf_enabled) { + ath10k_dbg(ar, ATH10K_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) { + ath10k_dbg(ar, ATH10K_DBG_BOOT, + "bdf variant magic does not match.\n"); + return; + } + + for (i = 0; i < strlen(bdf_ext); i++) { + if (!isascii(bdf_ext[i]) || !isprint(bdf_ext[i])) { + ath10k_dbg(ar, ATH10K_DBG_BOOT, + "bdf variant name contains non ascii chars.\n"); + return; + } + } + + /* Copy extension name without magic suffix */ + if (strscpy(ar->id.bdf_ext, bdf_ext + strlen(magic), + sizeof(ar->id.bdf_ext)) < 0) { + ath10k_dbg(ar, ATH10K_DBG_BOOT, + "bdf variant string is longer than the buffer can accommodate (variant: %s)\n", + bdf_ext); + return; + } + + ath10k_dbg(ar, ATH10K_DBG_BOOT, + "found and validated bdf variant smbios_type 0x%x bdf %s\n", + ATH10K_SMBIOS_BDF_EXT_TYPE, bdf_ext); +} + +static int ath10k_core_check_smbios(struct ath10k *ar) +{ + ar->id.bdf_ext[0] = '\0'; + dmi_walk(ath10k_core_check_bdfext, ar); + + if (ar->id.bdf_ext[0] == '\0') + return -ENODATA; + + return 0; +} + static int ath10k_download_and_run_otp(struct ath10k *ar) { u32 result, address = ar->hw_params.patch_load_addr; @@ -1013,6 +1081,23 @@ static int ath10k_core_fetch_board_data_api_n(struct ath10k *ar, case ATH10K_BD_IE_BOARD: ret = ath10k_core_parse_bd_ie_board(ar, data, ie_len, boardname); + if (ret == -ENOENT && ar->id.bdf_ext[0] != '\0') { + /* try default bdf if variant was not found */ + char *s, *v = ",variant="; + char boardname2[100]; + + strlcpy(boardname2, boardname, + sizeof(boardname2)); + + s = strstr(boardname2, v); + if (s) + *s = '\0'; /* strip ",variant=%s" */ + + ret = ath10k_core_parse_bd_ie_board(ar, data, + ie_len, + boardname2); + } + if (ret == -ENOENT) /* no match found, continue */ break; @@ -1050,6 +1135,9 @@ static int ath10k_core_fetch_board_data_api_n(struct ath10k *ar, static int ath10k_core_create_board_name(struct ath10k *ar, char *name, size_t name_len) { + /* strlen(',variant=') + strlen(ar->id.bdf_ext) */ + char variant[9 + ATH10K_SMBIOS_BDF_EXT_STR_LENGTH] = { 0 }; + if (ar->id.bmi_ids_valid) { scnprintf(name, name_len, "bus=%s,bmi-chip-id=%d,bmi-board-id=%d", @@ -1059,12 +1147,15 @@ static int ath10k_core_create_board_name(struct ath10k *ar, char *name, goto out; } + if (ar->id.bdf_ext[0] != '\0') + scnprintf(variant, sizeof(variant), ",variant=%s", + ar->id.bdf_ext); + scnprintf(name, name_len, - "bus=%s,vendor=%04x,device=%04x,subsystem-vendor=%04x,subsystem-device=%04x", + "bus=%s,vendor=%04x,device=%04x,subsystem-vendor=%04x,subsystem-device=%04x%s", ath10k_bus_str(ar->hif.bus), ar->id.vendor, ar->id.device, - ar->id.subsystem_vendor, ar->id.subsystem_device); - + ar->id.subsystem_vendor, ar->id.subsystem_device, variant); out: ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot using board name '%s'\n", name); @@ -2123,6 +2214,10 @@ static int ath10k_core_probe_fw(struct ath10k *ar) goto err_free_firmware_files; } + ret = ath10k_core_check_smbios(ar); + if (ret) + ath10k_dbg(ar, ATH10K_DBG_BOOT, "bdf variant name not set.\n"); + ret = ath10k_core_fetch_board_file(ar); if (ret) { ath10k_err(ar, "failed to fetch board file: %d\n", ret); diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index 09ff8b8a6441..77df39a5ed63 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -69,6 +69,23 @@ #define ATH10K_NAPI_BUDGET 64 #define ATH10K_NAPI_QUOTA_LIMIT 60 +/* SMBIOS type containing Board Data File Name Extension */ +#define ATH10K_SMBIOS_BDF_EXT_TYPE 0xF8 + +/* SMBIOS type structure length (excluding strings-set) */ +#define ATH10K_SMBIOS_BDF_EXT_LENGTH 0x9 + +/* Offset pointing to Board Data File Name Extension */ +#define ATH10K_SMBIOS_BDF_EXT_OFFSET 0x8 + +/* Board Data File Name Extension string length. + * String format: BDF__\0 + */ +#define ATH10K_SMBIOS_BDF_EXT_STR_LENGTH 0x20 + +/* The magic used by QCA spec */ +#define ATH10K_SMBIOS_BDF_EXT_MAGIC "BDF_" + struct ath10k; enum ath10k_bus { @@ -781,6 +798,8 @@ struct ath10k { bool bmi_ids_valid; u8 bmi_board_id; u8 bmi_chip_id; + + char bdf_ext[ATH10K_SMBIOS_BDF_EXT_STR_LENGTH]; } id; int fw_api;