From mboxrd@z Thu Jan 1 00:00:00 1970 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 A04F9C54EBE for ; Mon, 16 Jan 2023 16:24:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232964AbjAPQYd (ORCPT ); Mon, 16 Jan 2023 11:24:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232940AbjAPQXx (ORCPT ); Mon, 16 Jan 2023 11:23:53 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3298A3345B for ; Mon, 16 Jan 2023 08:13:05 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 45690B81059 for ; Mon, 16 Jan 2023 16:13:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B302C433D2; Mon, 16 Jan 2023 16:13:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673885582; bh=kbu1vVHx9t7b1FIZZW/ZmvZBmnndYlTOUDbH3KYCrGo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eqvoeWSw9+JjjkPTOuIQi95OJsCgNgO1YIExy0uit2D6D1hFutDNo64qq97DfdkuJ j3FT5fwn4LAGNRtolhEQf6XRcqQFdEpPvlc0+GAi5V+PEfvEIuSGny3SR5JiSBHWMi bBO13+iPSK/HGVHpbnRR5b3LqMNxZu/8pykn+zWY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anssi Hannula , Jimmy Assarsson , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.4 107/658] can: kvaser_usb: kvaser_usb_leaf: Handle CMD_ERROR_EVENT Date: Mon, 16 Jan 2023 16:43:15 +0100 Message-Id: <20230116154914.421165188@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154909.645460653@linuxfoundation.org> References: <20230116154909.645460653@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jimmy Assarsson [ Upstream commit b24cb2d169e0c9dce664a959e1f2aa9781285dc9 ] The device will send an error event command, to indicate certain errors. This indicates a misbehaving driver, and should never occur. Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices") Tested-by: Anssi Hannula Co-developed-by: Anssi Hannula Signed-off-by: Anssi Hannula Signed-off-by: Jimmy Assarsson Link: https://lore.kernel.org/all/20221010185237.319219-5-extja@kvaser.com Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- .../net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 99 +++++++++++++++++++ 1 file changed, 99 insertions(+) diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c index 4f3d1150b2b2..3c3e78992b55 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -69,6 +69,7 @@ #define CMD_GET_CARD_INFO_REPLY 35 #define CMD_GET_SOFTWARE_INFO 38 #define CMD_GET_SOFTWARE_INFO_REPLY 39 +#define CMD_ERROR_EVENT 45 #define CMD_FLUSH_QUEUE 48 #define CMD_TX_ACKNOWLEDGE 50 #define CMD_CAN_ERROR_EVENT 51 @@ -257,6 +258,28 @@ struct usbcan_cmd_can_error_event { __le16 time; } __packed; +/* CMD_ERROR_EVENT error codes */ +#define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL 0x8 +#define KVASER_USB_LEAF_ERROR_EVENT_PARAM 0x9 + +struct leaf_cmd_error_event { + u8 tid; + u8 error_code; + __le16 timestamp[3]; + __le16 padding; + __le16 info1; + __le16 info2; +} __packed; + +struct usbcan_cmd_error_event { + u8 tid; + u8 error_code; + __le16 info1; + __le16 info2; + __le16 timestamp; + __le16 padding; +} __packed; + struct kvaser_cmd_ctrl_mode { u8 tid; u8 channel; @@ -320,6 +343,7 @@ struct kvaser_cmd { struct leaf_cmd_chip_state_event chip_state_event; struct leaf_cmd_can_error_event can_error_event; struct leaf_cmd_log_message log_message; + struct leaf_cmd_error_event error_event; struct kvaser_cmd_cap_req cap_req; struct kvaser_cmd_cap_res cap_res; } __packed leaf; @@ -329,6 +353,7 @@ struct kvaser_cmd { struct usbcan_cmd_rx_can rx_can; struct usbcan_cmd_chip_state_event chip_state_event; struct usbcan_cmd_can_error_event can_error_event; + struct usbcan_cmd_error_event error_event; } __packed usbcan; struct kvaser_cmd_tx_can tx_can; @@ -352,6 +377,7 @@ static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = { [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.leaf.chip_state_event), [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.leaf.can_error_event), [CMD_GET_CAPABILITIES_RESP] = kvaser_fsize(u.leaf.cap_res), + [CMD_ERROR_EVENT] = kvaser_fsize(u.leaf.error_event), /* ignored events: */ [CMD_FLUSH_QUEUE_REPLY] = CMD_SIZE_ANY, }; @@ -366,6 +392,7 @@ static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = { [CMD_RX_EXT_MESSAGE] = kvaser_fsize(u.usbcan.rx_can), [CMD_CHIP_STATE_EVENT] = kvaser_fsize(u.usbcan.chip_state_event), [CMD_CAN_ERROR_EVENT] = kvaser_fsize(u.usbcan.can_error_event), + [CMD_ERROR_EVENT] = kvaser_fsize(u.usbcan.error_event), /* ignored events: */ [CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = CMD_SIZE_ANY, }; @@ -1308,6 +1335,74 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, netif_rx(skb); } +static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + u16 info1 = 0; + + switch (dev->driver_info->family) { + case KVASER_LEAF: + info1 = le16_to_cpu(cmd->u.leaf.error_event.info1); + break; + case KVASER_USBCAN: + info1 = le16_to_cpu(cmd->u.usbcan.error_event.info1); + break; + } + + /* info1 will contain the offending cmd_no */ + switch (info1) { + case CMD_SET_CTRL_MODE: + dev_warn(&dev->intf->dev, + "CMD_SET_CTRL_MODE error in parameter\n"); + break; + + case CMD_SET_BUS_PARAMS: + dev_warn(&dev->intf->dev, + "CMD_SET_BUS_PARAMS error in parameter\n"); + break; + + default: + dev_warn(&dev->intf->dev, + "Unhandled parameter error event cmd_no (%u)\n", + info1); + break; + } +} + +static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + u8 error_code = 0; + + switch (dev->driver_info->family) { + case KVASER_LEAF: + error_code = cmd->u.leaf.error_event.error_code; + break; + case KVASER_USBCAN: + error_code = cmd->u.usbcan.error_event.error_code; + break; + } + + switch (error_code) { + case KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL: + /* Received additional CAN message, when firmware TX queue is + * already full. Something is wrong with the driver. + * This should never happen! + */ + dev_err(&dev->intf->dev, + "Received error event TX_QUEUE_FULL\n"); + break; + case KVASER_USB_LEAF_ERROR_EVENT_PARAM: + kvaser_usb_leaf_error_event_parameter(dev, cmd); + break; + + default: + dev_warn(&dev->intf->dev, + "Unhandled error event (%d)\n", error_code); + break; + } +} + static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { @@ -1386,6 +1481,10 @@ static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev, kvaser_usb_leaf_tx_acknowledge(dev, cmd); break; + case CMD_ERROR_EVENT: + kvaser_usb_leaf_error_event(dev, cmd); + break; + /* Ignored commands */ case CMD_USBCAN_CLOCK_OVERFLOW_EVENT: if (dev->driver_info->family != KVASER_USBCAN) -- 2.35.1