From: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
To: Christoph Fritz <christoph.fritz@hexdev.de>
Cc: Jiri Slaby <jirislaby@kernel.org>,
Oliver Hartkopp <socketcan@hartkopp.net>,
Marc Kleine-Budde <mkl@pengutronix.de>,
Vincent Mailhol <mailhol.vincent@wanadoo.fr>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Jiri Kosina <jikos@kernel.org>,
Benjamin Tissoires <bentiss@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sebastian Reichel <sre@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Andreas Lauser <andreas.lauser@mercedes-benz.com>,
Jonathan Corbet <corbet@lwn.net>,
Pavel Pisa <pisa@cmp.felk.cvut.cz>,
linux-can@vger.kernel.org, Netdev <netdev@vger.kernel.org>,
devicetree@vger.kernel.org, linux-input@vger.kernel.org,
linux-serial <linux-serial@vger.kernel.org>
Subject: Re: [PATCH v3 09/11] can: lin: Handle rx offload config frames
Date: Mon, 6 May 2024 20:11:30 +0300 (EEST) [thread overview]
Message-ID: <9cf35451-9d03-e487-c06b-580208ac3a3d@linux.intel.com> (raw)
In-Reply-To: <20240502182804.145926-10-christoph.fritz@hexdev.de>
On Thu, 2 May 2024, Christoph Fritz wrote:
> The CAN Broadcast Manager now has the capability to dispatch CANFD
> frames marked with the id LINBUS_RXOFFLOAD_ID. This patch introduces
> functionality to interpret these specific frames, enabling the
> configuration of RX offloading within the LIN driver.
>
> Signed-off-by: Christoph Fritz <christoph.fritz@hexdev.de>
> ---
> drivers/net/can/lin.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/net/can/lin.c b/drivers/net/can/lin.c
> index 95906003666fb..ee2ebea2c865f 100644
> --- a/drivers/net/can/lin.c
> +++ b/drivers/net/can/lin.c
> @@ -194,6 +194,27 @@ static void lin_remove_sysfs_id_files(struct net_device *ndev)
> }
> }
>
> +static int lin_setup_rxoffload(struct lin_device *ldev,
> + struct canfd_frame *cfd)
> +{
> + struct lin_responder_answer answ;
> +
> + if (!(cfd->flags & CANFD_FDF))
> + return -EMSGSIZE;
This seems a bit odd error code.
> + BUILD_BUG_ON(sizeof(struct lin_responder_answer) > sizeof(cfd->data));
> + memcpy(&answ, cfd->data, sizeof(struct lin_responder_answer));
2x sizeof(answ)
> +
> + answ.lf.checksum_mode = (cfd->can_id & LIN_ENHANCED_CKSUM_FLAG) ?
> + LINBUS_ENHANCED : LINBUS_CLASSIC;
> +
> + if (answ.lf.lin_id > LIN_ID_MASK ||
> + answ.event_associated_id > LIN_ID_MASK)
> + return -EINVAL;
> +
> + return ldev->ldev_ops->update_responder_answer(ldev, &answ);
> +}
> +
> static void lin_tx_work_handler(struct work_struct *ws)
> {
> struct lin_device *ldev = container_of(ws, struct lin_device,
> @@ -206,6 +227,14 @@ static void lin_tx_work_handler(struct work_struct *ws)
> ldev->tx_busy = true;
>
> cfd = (struct canfd_frame *)ldev->tx_skb->data;
> +
> + if (cfd->can_id & LIN_RXOFFLOAD_DATA_FLAG) {
> + ret = lin_setup_rxoffload(ldev, cfd);
> + if (ret < 0)
> + netdev_err(ndev, "setting up rx failed %d\n", ret);
> + goto lin_tx_out;
> + }
> +
> lf.checksum_mode = (cfd->can_id & LIN_ENHANCED_CKSUM_FLAG) ?
> LINBUS_ENHANCED : LINBUS_CLASSIC;
> lf.lin_id = cfd->can_id & LIN_ID_MASK;
>
--
i.
next prev parent reply other threads:[~2024-05-06 17:11 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-02 18:27 [PATCH v3 00/11] LIN Bus support for Linux Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 01/11] can: Add LIN bus as CAN abstraction Christoph Fritz
2024-05-06 16:24 ` Ilpo Järvinen
2024-05-08 12:47 ` Christoph Fritz
2024-05-08 13:08 ` Ilpo Järvinen
2024-05-08 18:20 ` Christoph Fritz
2024-05-08 18:48 ` Greg Kroah-Hartman
2024-05-09 17:06 ` Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 02/11] HID: hexLIN: Add support for USB LIN bus adapter Christoph Fritz
2024-05-06 16:53 ` Ilpo Järvinen
2024-05-09 17:06 ` Christoph Fritz
2024-05-10 9:31 ` Ilpo Järvinen
2024-05-02 18:27 ` [PATCH v3 03/11] tty: serdev: Add flag buffer aware receive_buf_fp() Christoph Fritz
2024-05-04 16:00 ` Greg Kroah-Hartman
2024-05-08 8:48 ` Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 04/11] tty: serdev: Add method to enable break flags Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 05/11] dt-bindings: vendor-prefixes: Add hexDEV Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 06/11] dt-bindings: net/can: Add serial (serdev) LIN adapter Christoph Fritz
2024-05-03 17:12 ` Conor Dooley
2024-05-03 18:29 ` Christoph Fritz
2024-05-06 16:16 ` Conor Dooley
2024-05-06 18:50 ` Krzysztof Kozlowski
2024-05-08 11:34 ` Christoph Fritz
2024-05-08 16:16 ` Conor Dooley
2024-05-02 18:28 ` [PATCH v3 07/11] can: Add support for serdev LIN adapters Christoph Fritz
2024-05-06 17:03 ` Ilpo Järvinen
2024-05-09 17:06 ` Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 08/11] can: bcm: Add LIN answer offloading for responder mode Christoph Fritz
2024-05-06 17:08 ` Ilpo Järvinen
2024-05-09 17:06 ` Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 09/11] can: lin: Handle rx offload config frames Christoph Fritz
2024-05-06 17:11 ` Ilpo Järvinen [this message]
2024-05-09 17:07 ` Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 10/11] can: lin: Support setting LIN mode Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 11/11] HID: hexLIN: Implement ability to update lin mode Christoph Fritz
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