From patchwork Fri May 12 21:20:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 13239857 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B7EADC77B75 for ; Fri, 12 May 2023 21:20:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2y69ufMAqUYfVUbII4JxVwe9FvW7v4sAn6IsWvtVGOs=; b=Cj4Y1Ut6HOHPeVbrmYftWwaPoq AHC1WhGAP2Ckm1YSq6UA3k4I+fTkMukMTNAAN3QPaqDJTZbj5Ifwth7DO6axPbYIzgZEF5A21mdUZ XGsk1xOxLY2AOZOFeLXl+0iQtSs7n/2mCSl1ZG1bj1CVWC4XW9fSRgoQr/7e1o/eGYBtubX9WnwNW prKVObBj2egEaGO2Vwqff+oEaDLZwQkUesHwjqS9sNLNasOzFEWajKmkLtCue4Nd+S24tCYFN8zlg slkPThB4v01dVpab6A6rREgDueCE436hsGlPOR6oXCrmr8D3CMwHqsD7JCjv/LOqJDrwkNoVW/jSM jjQJjYlw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pxaBh-00D3sC-18; Fri, 12 May 2023 21:20:29 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pxaBd-00D3qk-2y for linux-mediatek@lists.infradead.org; Fri, 12 May 2023 21:20:27 +0000 X-UUID: ca84eddcf10a11ed83ed1395ce914268-20230512 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=2y69ufMAqUYfVUbII4JxVwe9FvW7v4sAn6IsWvtVGOs=; b=Be5jqB8eF7A0jkCPxRgVmL3pxXhwYoI23jljbMkQKQ19DAALpLm6dk+jh2gt5NnMASKocWXoy06H1Mg6+fv8+/RPMIqHz0I9OjsK4UmhAhAuAVihwTNw77+fpP1lI+4v6dXmFse6LEPmUljoQ+kH5wo4Dq2EcmNhwye7w7RiIh4=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.24,REQID:f4bca3a2-83c0-4592-8489-253cafe75bf5,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:178d4d4,CLOUDID:d831033b-de1e-4348-bc35-c96f92f1dcbb,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-UUID: ca84eddcf10a11ed83ed1395ce914268-20230512 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1135658024; Fri, 12 May 2023 14:20:16 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sat, 13 May 2023 05:20:14 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sat, 13 May 2023 05:20:14 +0800 From: To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , Jing Cai Subject: [PATCH v6 3/3] Bluetooth: btusb: mediatek: add MediaTek devcoredump support Date: Sat, 13 May 2023 05:20:09 +0800 Message-ID: <850ac832598f9d8558996fade7f7db0c0cf73521.1683925801.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230512_142025_966196_922543ED X-CRM114-Status: GOOD ( 21.31 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.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 --- drivers/bluetooth/btmtk.c | 106 ++++++++++++++++++++++++++++++++++++++ drivers/bluetooth/btmtk.h | 27 ++++++++++ drivers/bluetooth/btusb.c | 14 +++++ 3 files changed, 147 insertions(+) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index ac2fac7e3c5f..60233afc0a9c 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 btmtk_data *data = hci_get_priv(hdev); + char buf[80]; + + snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n", + data->cd_info.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 btmtk_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 +345,62 @@ void btmtk_reset_sync(struct hci_dev *hdev) } EXPORT_SYMBOL_GPL(btmtk_reset_sync); +int btmtk_register_coredump(struct hci_dev *hdev, u32 dev_id, + const char *name, u32 fw_version) +{ + struct btmtk_data *data = hci_get_priv(hdev); + + if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) + return -EOPNOTSUPP; + + data->cd_info.dev_id = dev_id; + 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 btmtk_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; + /* 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; + + if (skb->len > 12 && + !strncmp((char *)&skb->data[skb->len - 13], + MTK_COREDUMP_END, 12)) + 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 6245662f6ccb..852a67db8f80 100644 --- a/drivers/bluetooth/btmtk.h +++ b/drivers/bluetooth/btmtk.h @@ -21,6 +21,9 @@ #define MT7921_DLSTATUS 0x7c053c10 #define BT_DL_STATE BIT(1) +#define MTK_COREDUMP_SIZE (1024 * 1000) +#define MTK_COREDUMP_END "coredump end" + enum { BTMTK_WMT_PATCH_DWNLD = 0x1, BTMTK_WMT_TEST = 0x2, @@ -119,12 +122,20 @@ struct btmtk_hci_wmt_params { u32 *status; }; +struct btmtk_coredump_info { + const char *driver_name; + u32 dev_id; + u32 fw_version; + int state; +}; + typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *, struct btmtk_hci_wmt_params *); typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *); struct btmtk_data { + struct btmtk_coredump_info cd_info; btmtk_reset_sync_func_t reset_sync; }; @@ -139,6 +150,11 @@ 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, 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, @@ -162,4 +178,15 @@ 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, u32 dev_id, 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 034edd8ad777..1c2a0cbcf62e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3035,6 +3035,10 @@ static int btusb_mtk_setup(struct hci_dev *hdev) } btmtk_data->reset_sync = btusb_mtk_reset_work; + err = btmtk_register_coredump(hdev, dev_id, btusb_driver.name, + fw_version); + if (err < 0) + bt_dev_err(hdev, "Failed to register coredump (%d)", err); switch (dev_id) { case 0x7663: @@ -3189,6 +3193,7 @@ 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 */ @@ -3196,6 +3201,15 @@ 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 */