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0ed6e95255
W=1 builds now warn if module is built without a MODULE_DESCRIPTION(). Add descriptions to all the DSA tag modules. The descriptions are copy/pasted Kconfig names, with s/^Tag/DSA tag/. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com> Acked-by: Arınç ÜNAL <arinc.unal@arinc9.com> Acked-by: Kurt Kanzenbach <kurt@linutronix.de> Link: https://lore.kernel.org/r/20240104143759.1318137-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* XRS700x tag format handling
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* Copyright (c) 2008-2009 Marvell Semiconductor
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* Copyright (c) 2020 NovaTech LLC
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*/
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#include <linux/bitops.h>
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#include "tag.h"
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#define XRS700X_NAME "xrs700x"
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static struct sk_buff *xrs700x_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct dsa_port *partner, *dp = dsa_user_to_port(dev);
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u8 *trailer;
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trailer = skb_put(skb, 1);
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trailer[0] = BIT(dp->index);
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if (dp->hsr_dev)
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dsa_hsr_foreach_port(partner, dp->ds, dp->hsr_dev)
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if (partner != dp)
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trailer[0] |= BIT(partner->index);
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return skb;
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}
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static struct sk_buff *xrs700x_rcv(struct sk_buff *skb, struct net_device *dev)
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{
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int source_port;
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u8 *trailer;
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trailer = skb_tail_pointer(skb) - 1;
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source_port = ffs((int)trailer[0]) - 1;
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if (source_port < 0)
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return NULL;
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skb->dev = dsa_conduit_find_user(dev, 0, source_port);
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if (!skb->dev)
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return NULL;
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if (pskb_trim_rcsum(skb, skb->len - 1))
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return NULL;
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/* Frame is forwarded by hardware, don't forward in software. */
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dsa_default_offload_fwd_mark(skb);
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return skb;
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}
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static const struct dsa_device_ops xrs700x_netdev_ops = {
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.name = XRS700X_NAME,
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.proto = DSA_TAG_PROTO_XRS700X,
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.xmit = xrs700x_xmit,
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.rcv = xrs700x_rcv,
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.needed_tailroom = 1,
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};
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MODULE_DESCRIPTION("DSA tag driver for XRS700x switches");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_XRS700X, XRS700X_NAME);
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module_dsa_tag_driver(xrs700x_netdev_ops);
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