kernel/linux.git/include/net/dsa.h, branch v5.13.5

net: dsa: free skb->cb usage in core driver

2021-04-27T21:10:15+00:00

Free skb->cb usage in core driver and let device drivers decide to use or not. The reason having a DSA_SKB_CB(skb)->clone was because dsa_skb_tx_timestamp() which may set the clone pointer was called before p->xmit() which would use the clone if any, and the device driver has no way to initialize the clone pointer. This patch just put memset(skb->cb, 0, sizeof(skb->cb)) at beginning of dsa_slave_xmit(). Some new features in the future, like one-step timestamp may need more bytes of skb->cb to use in dsa_skb_tx_timestamp(), and p->xmit(). Signed-off-by: Yangbo Lu Acked-by: Richard Cochran Signed-off-by: David S. Miller

net: dsa: no longer clone skb in core driver

2021-04-27T21:10:15+00:00

It was a waste to clone skb directly in dsa_skb_tx_timestamp(). For one-step timestamping, a clone was not needed. For any failure of port_txtstamp (this may usually happen), the skb clone had to be freed. So this patch moves skb cloning for tx timestamp out of dsa core, and let drivers clone skb in port_txtstamp if they really need. Signed-off-by: Yangbo Lu Tested-by: Kurt Kanzenbach Acked-by: Richard Cochran Signed-off-by: David S. Miller

net: dsa: no longer identify PTP packet in core driver

2021-04-27T21:10:15+00:00

Move ptp_classify_raw out of dsa core driver for handling tx timestamp request. Let device drivers do this if they want. Not all drivers want to limit tx timestamping for only PTP packet. Signed-off-by: Yangbo Lu Tested-by: Kurt Kanzenbach Acked-by: Richard Cochran Signed-off-by: David S. Miller

net: dsa: Allow default tag protocol to be overridden from DT

2021-04-20T23:51:20+00:00

Some combinations of tag protocols and Ethernet controllers are incompatible, and it is hard for the driver to keep track of these. Therefore, allow the device tree author (typically the board vendor) to inform the driver of this fact by selecting an alternate protocol that is known to work. Signed-off-by: Tobias Waldekranz Reviewed-by: Vladimir Oltean Signed-off-by: David S. Miller

net: dsa: enable selftest support for all switches by default

2021-04-20T23:08:02+00:00

Most of generic selftest should be able to work with probably all ethernet controllers. The DSA switches are not exception, so enable it by default at least for DSA. This patch was tested with SJA1105 and AR9331. Signed-off-by: Oleksij Rempel Signed-off-by: David S. Miller

of: net: pass the dst buffer to of_get_mac_address()

2021-04-13T21:35:02+00:00

of_get_mac_address() returns a "const void*" pointer to a MAC address. Lately, support to fetch the MAC address by an NVMEM provider was added. But this will only work with platform devices. It will not work with PCI devices (e.g. of an integrated root complex) and esp. not with DSA ports. There is an of_* variant of the nvmem binding which works without devices. The returned data of a nvmem_cell_read() has to be freed after use. On the other hand the return of_get_mac_address() points to some static data without a lifetime. The trick for now, was to allocate a device resource managed buffer which is then returned. This will only work if we have an actual device. Change it, so that the caller of of_get_mac_address() has to supply a buffer where the MAC address is written to. Unfortunately, this will touch all drivers which use the of_get_mac_address(). Usually the code looks like: const char *addr; addr = of_get_mac_address(np); if (!IS_ERR(addr)) ether_addr_copy(ndev->dev_addr, addr); This can then be simply rewritten as: of_get_mac_address(np, ndev->dev_addr); Sometimes is_valid_ether_addr() is used to test the MAC address. of_get_mac_address() already makes sure, it just returns a valid MAC address. Thus we can just test its return code. But we have to be careful if there are still other sources for the MAC address before the of_get_mac_address(). In this case we have to keep the is_valid_ether_addr() call. The following coccinelle patch was used to convert common cases to the new style. Afterwards, I've manually gone over the drivers and fixed the return code variable: either used a new one or if one was already available use that. Mansour Moufid, thanks for that coccinelle patch! @a@ identifier x; expression y, z; @@ - x = of_get_mac_address(y); + x = of_get_mac_address(y, z); <... - ether_addr_copy(z, x); ...> @@ identifier a.x; @@ - if (<+... x ...+>) {} @@ identifier a.x; @@ if (<+... x ...+>) { ... } - else {} @@ identifier a.x; expression e; @@ - if (<+... x ...+>@e) - {} - else + if (!(e)) {...} @@ expression x, y, z; @@ - x = of_get_mac_address(y, z); + of_get_mac_address(y, z); ... when != x All drivers, except drivers/net/ethernet/aeroflex/greth.c, were compile-time tested. Suggested-by: Andrew Lunn Signed-off-by: Michael Walle Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller

net: dsa: Add helper to resolve bridge port from DSA port

2021-03-18T23:24:06+00:00

In order for a driver to be able to query a bridge for information about itself, e.g. reading out port flags, it has to use a netdev that is known to the bridge. In the simple case, that is just the netdev representing the port, e.g. swp0 or swp1 in this example: br0 / \ swp0 swp1 But in the case of an offloaded lag, this will be the bond or team interface, e.g. bond0 in this example: br0 / bond0 / \ swp0 swp1 Add a helper that hides some of this complexity from the drivers. Then, redefine dsa_port_offloads_bridge_port using the helper to avoid double accounting of the set of possible offloaded uppers. Signed-off-by: Tobias Waldekranz Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller

net: dsa: tag_brcm: add support for legacy tags

2021-03-17T19:24:36+00:00

Add support for legacy Broadcom tags, which are similar to DSA_TAG_PROTO_BRCM. These tags are used on BCM5325, BCM5365 and BCM63xx switches. Signed-off-by: Álvaro Fernández Rojas Signed-off-by: David S. Miller

net: dsa: add MRP support

2021-02-16T22:47:46+00:00

Add support for offloading MRP in HW. Currently implement the switchdev calls 'SWITCHDEV_OBJ_ID_MRP', 'SWITCHDEV_OBJ_ID_RING_ROLE_MRP', to allow to create MRP instances and to set the role of these instances. Add DSA_NOTIFIER_MRP_ADD/DEL and DSA_NOTIFIER_MRP_ADD/DEL_RING_ROLE which calls to .port_mrp_add/del and .port_mrp_add/del_ring_role in the DSA driver for the switch. Signed-off-by: Horatiu Vultur Signed-off-by: David S. Miller

net: dsa: propagate extack to .port_vlan_filtering

2021-02-15T01:38:12+00:00

Some drivers can't dynamically change the VLAN filtering option, or impose some restrictions, it would be nice to propagate this info through netlink instead of printing it to a kernel log that might never be read. Also netlink extack includes the module that emitted the message, which means that it's easier to figure out which ones are driver-generated errors as opposed to command misuse. Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller