From patchwork Mon Jul 29 13:05:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Kleine-Budde X-Patchwork-Id: 13744887 X-Patchwork-Delegate: kuba@kernel.org Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0750015ECD9 for ; Mon, 29 Jul 2024 13:07:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722258435; cv=none; b=V2CGETEPCd9hrKmrQmKsnP9cimvs57hAKIghxQO6v7GAbA98F/fH5DIZe6Kbz9AAHacInUZmV2MB6vbj9ue9YYxTE6g6Z6KBvJmGmIusjThbaV4FKTz3I7Iv1mAQQRdj5JHfF1fmou+e3Q8ZuffTIOS/5ELf5N4WxZicNoY41F0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722258435; c=relaxed/simple; bh=pk+HWp61aRbrMc8jao9rsWPH0utzFUIr6luS6CcCfzk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=CuP2/mUAFQSqkksME5yGxpzjcHPcMbzNWQSGrkEqQIY11b4WT5zu0f8XLMU9LbJInkBHJel8EIHie4jxUyL+uWdxt6c7tZmENKBlAQIK1g/IfWj6SdIVjBSWqfCcD9oijDC0vu5AiqUXKsg41J0cjrmwiABW10Xkg6c6tBQekXk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sYQ5o-0000ds-9o for netdev@vger.kernel.org; Mon, 29 Jul 2024 15:07:12 +0200 Received: from [2a0a:edc0:0:b01:1d::7b] (helo=bjornoya.blackshift.org) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sYQ5m-0033Dz-R3 for netdev@vger.kernel.org; Mon, 29 Jul 2024 15:07:10 +0200 Received: from dspam.blackshift.org (localhost [127.0.0.1]) by bjornoya.blackshift.org (Postfix) with SMTP id 7D632310E70 for ; Mon, 29 Jul 2024 13:07:10 +0000 (UTC) Received: from hardanger.blackshift.org (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by bjornoya.blackshift.org (Postfix) with ESMTPS id A43C5310DE2; Mon, 29 Jul 2024 13:06:59 +0000 (UTC) Received: from [172.20.34.65] (localhost [::1]) by hardanger.blackshift.org (OpenSMTPD) with ESMTP id f3d53853; Mon, 29 Jul 2024 13:06:31 +0000 (UTC) From: Marc Kleine-Budde Date: Mon, 29 Jul 2024 15:05:42 +0200 Subject: [PATCH can-next 11/21] can: rockchip_canfd: add functions to check if CAN-FD frames are equal Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240729-rockchip-canfd-v1-11-fa1250fd6be3@pengutronix.de> References: <20240729-rockchip-canfd-v1-0-fa1250fd6be3@pengutronix.de> In-Reply-To: <20240729-rockchip-canfd-v1-0-fa1250fd6be3@pengutronix.de> To: kernel@pengutronix.de, Vincent Mailhol , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Philipp Zabel , Elaine Zhang , David Jander Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, Marc Kleine-Budde X-Mailer: b4 0.15-dev-37811 X-Developer-Signature: v=1; a=openpgp-sha256; l=1974; i=mkl@pengutronix.de; h=from:subject:message-id; bh=pk+HWp61aRbrMc8jao9rsWPH0utzFUIr6luS6CcCfzk=; b=owEBbQGS/pANAwAKASg4oj56LbxvAcsmYgBmp5PFCHanwgo22d/CXs+k/48vJoczWNABB6IQO mY8hHz3lAqJATMEAAEKAB0WIQRQQLqG4LYE3Sm8Pl8oOKI+ei28bwUCZqeTxQAKCRAoOKI+ei28 b2gIB/9adnJSmWuuoCby01FRyUSVp3vwYNmiSBRj3NglwYqq1BMLbVUTDQv8GD8z8zRVn/YOmtq NSbOr86kyzQJuFQqr95dGUZ3lTXAQg0m7vw+fzWL5dd7l1I8OkjiZaGvKYp9wek9bFZBMSojWNm f0ZJUzDrML07mCcQ6+3c7QKSItIgtDkcEsVLZ6/3WEMZ0KpxoKeL5jNSeUPevcq0NaHWYSN42Qj NCpuCjSHdfB10WZs4Gau5yJN/7vpHqUilue5/MzE5BjXatNzqjY0IBYVevQ2IqWA7CN1fWiDz3k xEcyf1ud5EzFiFOb9haxQJKAUY82HHUIeDcZQ1oqEaiUhWz5 X-Developer-Key: i=mkl@pengutronix.de; a=openpgp; fpr=C1400BA0B3989E6FBC7D5B5C2B5EE211C58AEA54 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Add a pair new functions to check if 2 struct canfd_frame are equal. The 1st checks if the header of the CAN frames are equal, the 2nd checks if the data portion are equal: - rkcanfd_can_frame_header_equal() - rkcanfd_can_frame_data_equal() This functionality is needed in the next patch. Signed-off-by: Marc Kleine-Budde --- drivers/net/can/rockchip/rockchip_canfd-rx.c | 42 ++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/net/can/rockchip/rockchip_canfd-rx.c b/drivers/net/can/rockchip/rockchip_canfd-rx.c index c7b316e52580..df5280375ca9 100644 --- a/drivers/net/can/rockchip/rockchip_canfd-rx.c +++ b/drivers/net/can/rockchip/rockchip_canfd-rx.c @@ -6,6 +6,48 @@ #include "rockchip_canfd.h" +static bool rkcanfd_can_frame_header_equal(const struct canfd_frame *const cfd1, + const struct canfd_frame *const cfd2, + const bool is_canfd) +{ + const u8 mask_flags = CANFD_BRS | CANFD_ESI | CANFD_FDF; + canid_t mask = CAN_EFF_FLAG; + + if (canfd_sanitize_len(cfd1->len) != canfd_sanitize_len(cfd2->len)) + return false; + + if (!is_canfd) + mask |= CAN_RTR_FLAG; + + if (cfd1->can_id & CAN_EFF_FLAG) + mask |= CAN_EFF_MASK; + else + mask |= CAN_SFF_MASK; + + if ((cfd1->can_id & mask) != (cfd2->can_id & mask)) + return false; + + if (is_canfd && + (cfd1->flags & mask_flags) != (cfd2->flags & mask_flags)) + return false; + + return true; +} + +static bool rkcanfd_can_frame_data_equal(const struct canfd_frame *cfd1, + const struct canfd_frame *cfd2, + const bool is_canfd) +{ + u8 len; + + if (!is_canfd && (cfd1->can_id & CAN_RTR_FLAG)) + return true; + + len = canfd_sanitize_len(cfd1->len); + + return !memcmp(cfd1->data, cfd2->data, len); +} + static unsigned int rkcanfd_fifo_header_to_cfd_header(const struct rkcanfd_priv *priv, const struct rkcanfd_fifo_header *header,