From patchwork Sat Jun 24 02:04:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 13291559 X-Patchwork-Delegate: johannes@sipsolutions.net 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 D3F7FEB64D7 for ; Sat, 24 Jun 2023 02:07:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230293AbjFXCHQ (ORCPT ); Fri, 23 Jun 2023 22:07:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230280AbjFXCHO (ORCPT ); Fri, 23 Jun 2023 22:07:14 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1177BE52 for ; Fri, 23 Jun 2023 19:07:12 -0700 (PDT) X-UUID: d12045f2123311eeb20a276fd37b9834-20230624 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=PZC0t64Ob4JraVS9DGN0FkfHd055RgXVfPCCR576qLc=; b=dR2Pbg/0zec2eYm9NyacJpg/GC61p7oD8Ph3eT2MWGj+mW4pYzcLzpZr4n3H/2vVUhHSV6KQ93GvlwNsM+UTDtvSU1QE40TjO7/lkSR2RQrjwSBFlmqalewwsMUYYVv1vMS42otxzDjioVkcvbWuh4TVvXzvI8/zgyAebyZu6Uc=; X-CID-CACHE: Type:Local,Time:202306241004+08,HitQuantity:1 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.27,REQID:d8d185fe-3a9e-4458-88c6-7ba41d8ecdc4,IP:0,U RL:0,TC:0,Content:0,EDM:25,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:25 X-CID-META: VersionHash:01c9525,CLOUDID:7d33f66f-2f20-4998-991c-3b78627e4938,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:5,IP:nil,UR L:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:N O X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: d12045f2123311eeb20a276fd37b9834-20230624 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 605363455; Sat, 24 Jun 2023 10:07:05 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sat, 24 Jun 2023 10:04:20 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sat, 24 Jun 2023 10:04:20 +0800 From: To: , CC: , , , , , , , , , , , , , , , , , , , , , , , "Jing Cai" , Chris Lu Subject: [PATCH v7 3/3] Bluetooth: btusb: mediatek: add MediaTek devcoredump support Date: Sat, 24 Jun 2023 10:04:12 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <2d7bef70b876e4cbd447c5109956f716bad5bc2d.1687565769.git.objelf@gmail.com> References: <2d7bef70b876e4cbd447c5109956f716bad5bc2d.1687565769.git.objelf@gmail.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@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 v5: support devcoredump on hdev basis v6: reuse the coredump state HCI_DEVCOREDUMP_* in driver and drop the driver name copying v7: rebase ontto the latest codebase and refine the check if we are reaching the end of the coredump --- drivers/bluetooth/btmtk.c | 112 ++++++++++++++++++++++++++++++++++++++ drivers/bluetooth/btmtk.h | 28 ++++++++++ drivers/bluetooth/btusb.c | 14 +++++ 3 files changed, 154 insertions(+) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index b8678b75276e..8fe1b7e7255c 100644 --- a/drivers/bluetooth/btmtk.c +++ b/drivers/bluetooth/btmtk.c @@ -53,6 +53,56 @@ struct btmtk_section_map { }; } __packed; +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) +{ + struct btmediatek_data *data = hci_get_priv(hdev); + char buf[80]; + + snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n", + data->dev_id); + skb_put_data(skb, buf, strlen(buf)); + + snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n", + data->cd_info.fw_version); + skb_put_data(skb, buf, strlen(buf)); + + snprintf(buf, sizeof(buf), "Driver: %s\n", + data->cd_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) +{ + struct btmediatek_data *data = hci_get_priv(hdev); + + switch (state) { + case HCI_DEVCOREDUMP_IDLE: + data->cd_info.state = HCI_DEVCOREDUMP_IDLE; + break; + case HCI_DEVCOREDUMP_ACTIVE: + data->cd_info.state = HCI_DEVCOREDUMP_ACTIVE; + break; + case HCI_DEVCOREDUMP_TIMEOUT: + case HCI_DEVCOREDUMP_ABORT: + case HCI_DEVCOREDUMP_DONE: + data->cd_info.state = HCI_DEVCOREDUMP_IDLE; + btmtk_reset_sync(hdev); + break; + } +} + int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname, wmt_cmd_sync_func_t wmt_cmd_sync) { @@ -295,6 +345,68 @@ void btmtk_reset_sync(struct hci_dev *hdev) } EXPORT_SYMBOL_GPL(btmtk_reset_sync); +int btmtk_register_coredump(struct hci_dev *hdev, const char *name, + u32 fw_version) +{ + struct btmediatek_data *data = hci_get_priv(hdev); + + if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) + return -EOPNOTSUPP; + + data->cd_info.fw_version = fw_version; + data->cd_info.state = HCI_DEVCOREDUMP_IDLE; + data->cd_info.driver_name = name; + + return 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) +{ + struct btmediatek_data *data = hci_get_priv(hdev); + int err; + + if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) + return 0; + + switch (data->cd_info.state) { + case HCI_DEVCOREDUMP_IDLE: + err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE); + if (err < 0) + break; + data->cd_info.cnt = 0; + + /* It is supposed coredump can be done within 5 seconds */ + schedule_delayed_work(&hdev->dump.dump_timeout, + msecs_to_jiffies(5000)); + fallthrough; + case HCI_DEVCOREDUMP_ACTIVE: + default: + err = hci_devcd_append(hdev, skb); + if (err < 0) + break; + data->cd_info.cnt++; + + /* Mediatek coredump data would be more than MTK_COREDUMP_NUM */ + if (data->cd_info.cnt > MTK_COREDUMP_NUM && + skb->len > sizeof(MTK_COREDUMP_END) && + !memcmp((char *)&skb->data[skb->len - sizeof(MTK_COREDUMP_END)], + MTK_COREDUMP_END, sizeof(MTK_COREDUMP_END) - 1)) { + bt_dev_info(hdev, "Mediatek coredump end"); + hci_devcd_complete(hdev); + } + + break; + } + + if (err < 0) + 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 75d8e71efcd3..68309dfe076a 100644 --- a/drivers/bluetooth/btmtk.h +++ b/drivers/bluetooth/btmtk.h @@ -22,6 +22,10 @@ #define MT7921_DLSTATUS 0x7c053c10 #define BT_DL_STATE BIT(1) +#define MTK_COREDUMP_SIZE (1024 * 1000) +#define MTK_COREDUMP_END "coredump end" +#define MTK_COREDUMP_NUM 255 + enum { BTMTK_WMT_PATCH_DWNLD = 0x1, BTMTK_WMT_TEST = 0x2, @@ -122,9 +126,17 @@ struct btmtk_hci_wmt_params { typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *); +struct btmtk_coredump_info { + const char *driver_name; + u32 fw_version; + u16 cnt; + int state; +}; + struct btmediatek_data { u32 dev_id; btmtk_reset_sync_func_t reset_sync; + struct btmtk_coredump_info cd_info; }; typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *, @@ -141,6 +153,11 @@ int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname, wmt_cmd_sync_func_t wmt_cmd_sync); void btmtk_reset_sync(struct hci_dev *hdev); + +int btmtk_register_coredump(struct hci_dev *hdev, 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, @@ -164,4 +181,15 @@ static int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname, static void btmtk_reset_sync(struct hci_dev *hdev) { } + +static int btmtk_register_coredump(struct hci_dev *hdev, const char *name, + u32 fw_version) +{ + return -EOPNOTSUPP; +} + +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 4ebab61c288c..729445ef3871 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3150,6 +3150,10 @@ static int btusb_mtk_setup(struct hci_dev *hdev) mediatek->dev_id = dev_id; mediatek->reset_sync = btusb_mtk_reset_work; + err = btmtk_register_coredump(hdev, btusb_driver.name, fw_version); + if (err < 0) + bt_dev_err(hdev, "Failed to register coredump (%d)", err); + switch (dev_id) { case 0x7663: fwname = FIRMWARE_MT7663; @@ -3310,6 +3314,7 @@ 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 */ @@ -3317,6 +3322,15 @@ 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 */