From patchwork Wed Apr 26 23:08:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 13225020 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFEF2C77B7F for ; Wed, 26 Apr 2023 23:09:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239466AbjDZXJE (ORCPT ); Wed, 26 Apr 2023 19:09:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229582AbjDZXJC (ORCPT ); Wed, 26 Apr 2023 19:09:02 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26645BB; Wed, 26 Apr 2023 16:08:59 -0700 (PDT) X-UUID: 4f49de0ae48711edb6b9f13eb10bd0fe-20230427 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=MjQmkvN1bHP14qGtS7nnlOwqloIPdNnbXQ2Bz4X1HWA=; b=q8S6mrtesyj2lQuemH3U8WEArX0f2Bxm8imQKrTCiL8rvZAkX5Sa3Oh1YbHTpXTsj1niFAJY7uz15z+hnYoUFtNtGjaYYWrDG82eFw6NdSvkUhz1ZC0pOtVcbkTUI8Su6lMWxnnL1xxBrjSyeEH1aUVNvZU5gS5Pb0CvC7q135U=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.22,REQID:9d465849-e6f6-4b82-90fd-a845aa6bc0f3,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:95 X-CID-INFO: VERSION:1.1.22,REQID:9d465849-e6f6-4b82-90fd-a845aa6bc0f3,IP:0,URL :0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTION :quarantine,TS:95 X-CID-META: VersionHash:120426c,CLOUDID:d08f5b85-cd9c-45f5-8134-710979e3df0e,B ulkID:2304270708535YV56AV6,BulkQuantity:0,Recheck:0,SF:38|29|28|17|19|48,T C:nil,Content:0,EDM:-3,IP:nil,URL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,CO L:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-UUID: 4f49de0ae48711edb6b9f13eb10bd0fe-20230427 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 169641459; Thu, 27 Apr 2023 07:08:52 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Thu, 27 Apr 2023 07:08:50 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 27 Apr 2023 07:08:50 +0800 From: To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , Jing Cai Subject: [PATCH v4 3/3] Bluetooth: btusb: mediatek: add MediaTek devcoredump support Date: Thu, 27 Apr 2023 07:08:45 +0800 Message-ID: <01d3fe06d3a1e333b193e7d9fbc9cbfb4ee5d02b.1682549719.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <4699f59b36d522ec263dcea71eda40ae939004f8.1682549719.git.objelf@gmail.com> References: <4699f59b36d522ec263dcea71eda40ae939004f8.1682549719.git.objelf@gmail.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Jing Cai This patch implement function .coredump() and dmp_hdr() in btusb driver for MediaTek controller. FW core dump was triggered by FW specific event to show something unexpected happened in the controller. The driver would be responsible for collecting and uploading the device core dump pieces in hci driver using core dump API. Once we finished the whole process, the driver would reset the controller to recover the kind of fatal error. Co-developed-by: Chris Lu Signed-off-by: Chris Lu Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: Jing Cai --- v2, v3: rebase onto the latest codebase v4: update the newest API usage for the coredump which was already into the upstream --- drivers/bluetooth/btmtk.c | 120 ++++++++++++++++++++++++++++++++++++++ drivers/bluetooth/btmtk.h | 13 +++++ drivers/bluetooth/btusb.c | 11 ++++ 3 files changed, 144 insertions(+) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index 77df7b5c3ef3..96c1b49cf7c0 100644 --- a/drivers/bluetooth/btmtk.c +++ b/drivers/bluetooth/btmtk.c @@ -18,6 +18,15 @@ #define MTK_FW_ROM_PATCH_SEC_MAP_SIZE 64 #define MTK_SEC_MAP_COMMON_SIZE 12 #define MTK_SEC_MAP_NEED_SEND_SIZE 52 +#define MTK_DRIVER_NAME_LEN 16 +#define MTK_COREDUMP_SIZE (1024 * 1000) +#define MTK_COREDUMP_END "coredump end" + +enum { + BTMTK_COREDUMP_INIT, + BTMTK_COREDUMP_DISABLED, + BTMTK_COREDUMP_ACTIVE, +}; struct btmtk_patch_header { u8 datetime[16]; @@ -53,8 +62,60 @@ struct btmtk_section_map { }; } __packed; +static struct btmtk_coredump_info { + struct hci_dev *hdev; + char driver_name[MTK_DRIVER_NAME_LEN]; + u32 dev_id; + u32 fw_version; + int state; +} coredump_info; + static struct btmtk_reset_work reset_work; +static void btmtk_coredump(struct hci_dev *hdev) +{ + int err; + + err = __hci_cmd_send(hdev, 0xfd5b, 0, NULL); + if (err < 0) + bt_dev_err(hdev, "Coredump failed (%d)", err); +} + +static void btmtk_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb) +{ + char buf[80]; + + snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n", coredump_info.dev_id); + skb_put_data(skb, buf, strlen(buf)); + + snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n", coredump_info.fw_version); + skb_put_data(skb, buf, strlen(buf)); + + snprintf(buf, sizeof(buf), "Driver: %s\n", coredump_info.driver_name); + skb_put_data(skb, buf, strlen(buf)); + + snprintf(buf, sizeof(buf), "Vendor: MediaTek\n"); + skb_put_data(skb, buf, strlen(buf)); +} + +static void btmtk_coredump_notify(struct hci_dev *hdev, int state) +{ + switch (state) { + case HCI_DEVCOREDUMP_IDLE: + coredump_info.state = BTMTK_COREDUMP_INIT; + break; + case HCI_DEVCOREDUMP_ACTIVE: + coredump_info.state = BTMTK_COREDUMP_ACTIVE; + break; + case HCI_DEVCOREDUMP_TIMEOUT: + case HCI_DEVCOREDUMP_ABORT: + case HCI_DEVCOREDUMP_DONE: + coredump_info.state = BTMTK_COREDUMP_INIT; + btmtk_reset_sync(coredump_info.hdev); + break; + } +} + int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname, wmt_cmd_sync_func_t wmt_cmd_sync) { @@ -296,6 +357,65 @@ void btmtk_reset_sync(struct hci_dev *hdev) } EXPORT_SYMBOL_GPL(btmtk_reset_sync); +void btmtk_register_coredump(struct hci_dev *hdev, u32 dev_id, + const char *name, u32 fw_version) +{ + if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) + return; + + coredump_info.hdev = hdev; + coredump_info.dev_id = dev_id; + coredump_info.fw_version = fw_version; + coredump_info.state = BTMTK_COREDUMP_INIT; + strncpy(coredump_info.driver_name, name, MTK_DRIVER_NAME_LEN - 1); + + hci_devcd_register(hdev, btmtk_coredump, btmtk_coredump_hdr, + btmtk_coredump_notify); +} +EXPORT_SYMBOL_GPL(btmtk_register_coredump); + +int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb) +{ + int err; + + if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) + return 0; + + switch (coredump_info.state) { + case BTMTK_COREDUMP_DISABLED: + err = -EINVAL; + break; + case BTMTK_COREDUMP_INIT: + err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE); + if (err < 0) + break; + /* It is supposed coredump can be done within 5 seconds */ + schedule_delayed_work(&hdev->dump.dump_timeout, + msecs_to_jiffies(5000)); + fallthrough; + case BTMTK_COREDUMP_ACTIVE: + default: + err = hci_devcd_append(hdev, skb); + if (err < 0) + break; + + if (skb->len > 12 && + !strncmp((char *)&skb->data[skb->len - 13], + MTK_COREDUMP_END, 12)) + hci_devcd_complete(hdev); + + break; + } + + if (err < 0) { + coredump_info.state = BTMTK_COREDUMP_DISABLED; + kfree_skb(skb); + } + + return err; +} +EXPORT_SYMBOL_GPL(btmtk_process_coredump); + MODULE_AUTHOR("Sean Wang "); MODULE_AUTHOR("Mark Chen "); MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION); diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h index 22d39f637652..faf941ce7ca2 100644 --- a/drivers/bluetooth/btmtk.h +++ b/drivers/bluetooth/btmtk.h @@ -138,6 +138,9 @@ int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname, wmt_cmd_sync_func_t wmt_cmd_sync); void btmtk_init_reset_work(struct hci_dev *hdev, work_func_t func); void btmtk_reset_sync(struct hci_dev *hdev); +void btmtk_register_coredump(struct hci_dev *hdev, u32 dev_id, const char *name, + u32 fw_version); +int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb); #else static inline int btmtk_set_bdaddr(struct hci_dev *hdev, @@ -165,4 +168,14 @@ static void btmtk_init_reset_work(struct hci_dev *hdev, work_func_t func) static void btmtk_reset_sync(struct hci_dev *hdev) { } + +void btmtk_register_coredump(struct hci_dev *hdev, u32 dev_id, const char *name, + u32 fw_version) +{ +} + +static int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb) +{ + return -EOPNOTSUPP; +} #endif diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index e84f1a8d03a3..72a1cf83a859 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3036,6 +3036,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev) } btmtk_init_reset_work(hdev, btusb_mtk_reset_work); + btmtk_register_coredump(hdev, dev_id, btusb_driver.name, fw_version); switch (dev_id) { case 0x7663: @@ -3190,6 +3191,7 @@ static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb) { struct btusb_data *data = hci_get_drvdata(hdev); u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle); + struct sk_buff *skb_cd; switch (handle) { case 0xfc6f: /* Firmware dump from device */ @@ -3197,6 +3199,15 @@ static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb) * suspend and thus disable auto-suspend. */ usb_disable_autosuspend(data->udev); + + /* We need to forward the diagnostic packet to userspace daemon + * for backward compatibility, so we have to clone the packet + * extraly for the in-kernel coredump support. + */ + skb_cd = skb_clone(skb, GFP_ATOMIC); + if (skb_cd) + btmtk_process_coredump(hdev, skb_cd); + fallthrough; case 0x05ff: /* Firmware debug logging 1 */ case 0x05fe: /* Firmware debug logging 2 */