- 08 Feb, 2021 10 commits
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Zheng Yongjun authored
mutex lock can be initialized automatically with DEFINE_MUTEX() rather than explicitly calling mutex_init(). Signed-off-by:
Zheng Yongjun <zhengyongjun3@huawei.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20201224132456.31341-1-zhengyongjun3@huawei.com
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Arnd Bergmann authored
sturct d11txh contains a ieee80211_rts structure, which is required to have at least two byte alignment, and this conflicts with the __packed attribute: drivers/net/wireless/broadcom/brcm80211/brcmsmac/d11.h:786:1: warning: alignment 1 of 'struct d11txh' is less than 2 [-Wpacked-not-aligned] Mark d11txh itself as having two-byte alignment to ensure the inner structure is properly aligned. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Hans de Goede authored
The Voyo winpad A15 tablet contains quite generic names in the sys_vendor and product_name DMI strings, without this patch brcmfmac will try to load: rcmfmac4330-sdio.To be filled by O.E.M.-To be filled by O.E.M..txt as nvram file which is a bit too generic. Add a DMI quirk so that a unique and clearly identifiable nvram file name is used on the Voyo winpad A15 tablet. While preparing a matching linux-firmware update I noticed that the nvram is identical to the nvram used on the Prowise-PT301 tablet, so the new DMI quirk entry simply points to the already existing Prowise-PT301 nvram file. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
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Hans de Goede authored
The Predia Basic tablet contains quite generic names in the sys_vendor and product_name DMI strings, without this patch brcmfmac will try to load: brcmfmac43340-sdio.Insyde-CherryTrail.txt as nvram file which is a bit too generic. Add a DMI quirk so that a unique and clearly identifiable nvram file name is used on the Predia Basic tablet. Signed-off-by:
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Guo-Feng Fan authored
RFE type2 is a new NIC which has one RF antenna shares with BT. Update phy parameter to verstion V57 to allow initial procedure to load extra AGC table for sharing antenna NIC. Signed-off-by:
Guo-Feng Fan <vincent_fann@realtek.com> Signed-off-by:
Ping-Ke Shih <pkshih@realtek.com> Tested-by:
Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by:
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Guo-Feng Fan authored
Incorrect CCK RSSI may cause periodically scan from upper layer. 8821c phy status does NOT has actual value of CCK power. It provides only lna and vga index. Driver have to use these indexes to calculate actual RSSI. Signed-off-by:
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Guo-Feng Fan authored
This patch fixes a defect that uses incorrect function to access registers. Use 8 and 32 bit access function to access 8 and 32 bit long data respectively. Signed-off-by:
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Colin Ian King authored
The variable rtstatu is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by:Colin Ian King <colin.king@canonical.com> Acked-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
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Emil Renner Berthing authored
In commit d3ccc14d most of the tasklets in this driver was updated to the new API. However for the rx_work_tasklet only the type of the callback was changed from void _rtl_rx_work(unsigned long data) to void _rtl_rx_work(struct tasklet_struct *t). The initialization of rx_work_tasklet was still open-coded and the function pointer just cast into the old type, and hence nothing sets rx_work_tasklet.use_callback = true and the callback was still called as t->func(t->data); with uninitialized/zero t->data. Commit 6b8c7574 changed the casting of _rtl_rx_work a bit and initialized t->data to a pointer to the tasklet cast to an unsigned long. This way calling t->func(t->data) might actually work through all the casting, but it still doesn't update the code to use the new tasklet API. Let's use the new tasklet_setup to initialize rx_work_tasklet properly and set rx_work_tasklet.use_callback = true so that the callback is called as t->callback(t); without all the casting. Signed-off-by:
Emil Renner Berthing <kernel@esmil.dk> Acked-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.gitKalle Valo authored
ath.git patches for v5.12. Major changes: ath10k * support setting SAR limits via nl80211
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- 07 Feb, 2021 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queueJakub Kicinski authored
Tony Nguyen says: ==================== 100GbE Intel Wired LAN Driver Updates 2021-02-05 This series contains updates to ice driver only. Jake adds adds reporting of timeout length during devlink flash and implements support to report devlink info regarding the version of firmware that is stored (downloaded) to the device, but is not yet active. ice_devlink_info_get will report "stored" versions when there is no pending flash update. Version info includes the UNDI Option ROM, the Netlist module, and the fw.bundle_id. Gustavo A. R. Silva replaces a one-element array to flexible-array member. Bruce utilizes flex_array_size() helper and removes dead code on a check for a condition that can't occur. v2: * removed security revision implementation, and re-ordered patches to account for this removal * squashed patches implementing ice_read_flash_module to avoid patches refactoring the implementation of a previous patch in the series * modify ice_devlink_info_get to always report "stored" versions instead of only reporting them when a pending flash update is ready. * '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue: ice: remove dead code ice: use flex_array_size where possible ice: Replace one-element array with flexible-array member ice: display stored UNDI firmware version via devlink info ice: display stored netlist versions via devlink info ice: display some stored NVM versions via devlink info ice: introduce function for reading from flash modules ice: cache NVM module bank information ice: introduce context struct for info report ice: create flash_info structure and separate NVM version ice: report timeout length for erasing during devlink flash ==================== Link: https://lore.kernel.org/r/20210206044101.636242-1-anthony.l.nguyen@intel.comSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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- 06 Feb, 2021 29 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextJakub Kicinski authored
Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next 1) Remove indirection and use nf_ct_get() instead from nfnetlink_log and nfnetlink_queue, from Florian Westphal. 2) Add weighted random twos choice least-connection scheduling for IPVS, from Darby Payne. 3) Add a __hash placeholder in the flow tuple structure to identify the field to be included in the rhashtable key hash calculation. 4) Add a new nft_parse_register_load() and nft_parse_register_store() to consolidate register load and store in the core. 5) Statify nft_parse_register() since it has no more module clients. 6) Remove redundant assignment in nft_cmp, from Colin Ian King. * git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next: netfilter: nftables: remove redundant assignment of variable err netfilter: nftables: statify nft_parse_register() netfilter: nftables: add nft_parse_register_store() and use it netfilter: nftables: add nft_parse_register_load() and use it netfilter: flowtable: add hash offset field to tuple ipvs: add weighted random twos choice algorithm netfilter: ctnetlink: remove get_ct indirection ==================== Link: https://lore.kernel.org/r/20210206015005.23037-1-pablo@netfilter.orgSigned-off-by:
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Heiner Kallweit authored
There's no benefit in trying to disable interrupts if NAPI is scheduled already. This allows us to save a PCI write in this case. Signed-off-by:
Heiner Kallweit <hkallweit1@gmail.com> Link: https://lore.kernel.org/r/78c7f2fb-9772-1015-8c1d-632cbdff253f@gmail.comSigned-off-by:
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Xie He authored
The "dev_has_header" function, recently added in commit d5496990 ("net/packet: fix packet receive on L3 devices without visible hard header"), is more accurate as criteria for determining whether a device exposes the LL header to upper layers, because in addition to dev->header_ops, it also checks for dev->header_ops->create. When transmitting an skb on a device, dev_hard_header can be called to generate an LL header. dev_hard_header will only generate a header if dev->header_ops->create is present. Signed-off-by:
Xie He <xie.he.0141@gmail.com> Acked-by:
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Jakub Kicinski authored
Alex Elder says: ==================== net: ipa: a mix of small improvements Version 2 of this series restructures a couple of the changed functions (in patches 1 and 2) to avoid blocks of indented code by returning early when possible, as suggested by Jakub. The description of the first patch was changed as a result, to better reflect what the updated patch does. It also fixes one spot I identified when updating the code, where gsi_channel_stop() was doing the wrong thing on error. The original description for this series is below. This series contains a sort of unrelated set of code cleanups. The first two are things I wanted to do in a series that updated some NAPI code recently. I didn't want to change things in a way that affected existing testing so I set these aside for later (i.e., now). The third makes a change to event ring handling that's similar to what was done a while back for channels. There's little benefit to cacheing the current state of an event ring, so with this we'll just fetch the state from hardware whenever we need it. The fourth patch removes the definitions of two unused symbols. The fifth replaces a count that is always 0 or 1 with a Boolean. The sixth removes a build-time validation check that doesn't really provide benefit. And the last one fixes a problem (in two spots) that could cause a build-time check to fail "bogusly". ==================== Link: https://lore.kernel.org/r/20210205221100.1738-1-elder@linaro.orgSigned-off-by:
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Alex Elder authored
It's possible that the length passed to ipa_header_size_encoded() is larger than what can be represented by the HDR_LEN field alone (starting with IPA v4.5). If we attempted that, u32_encode_bits() would trigger a build-time error. Avoid this problem by masking off high-order bits of the value encoded as the lower portion of the header length. The same sort of problem exists in ipa_metadata_offset_encoded(), so implement the same fix there. Signed-off-by:
Alex Elder <elder@linaro.org> Signed-off-by:
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Alex Elder authored
There is a build-time check that the packet status structure is a multiple of 4 bytes in size. It's not clear where that constraint comes from, but the structure defines what hardware provides so its definition won't change. Get rid of the check; it adds no value. Signed-off-by:
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Alex Elder authored
The count argument to ipa_endpoint_replenish() is only ever 0 or 1, and always will be (because we always handle each receive buffer in a single transaction). Rename the argument to be add_one and change it to be Boolean. Update the function description to reflect the current code. Signed-off-by:
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Alex Elder authored
We do not support inter-EE channel or event ring commands. Inter-EE interrupts are disabled (and never re-enabled) for all channels and event rings, so we have no need for the GSI registers that clear those interrupt conditions. So remove their definitions. Signed-off-by:
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Alex Elder authored
An event ring's state only needs to be known when it is allocated, reset, or deallocated. We check an event ring's state both before and after performing an event ring control command that changes its state. These are only issued at startup and shutdown, so there is very little value in caching the state. Stop recording a copy of the channel's last known state, and instead fetch the true state from hardware whenever it's needed. In such cases, *do* record the state in a local variable, in case an error message reports it (so the value reported is the value seen). Signed-off-by:
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Alex Elder authored
When stopping a channel, gsi_channel_stop() will ensure NAPI polling is complete when it calls napi_disable(). So there is no need to call napi_synchronize() in that case. Move the call to napi_synchronize() out of __gsi_channel_stop() and into gsi_channel_suspend(), so it's only used where needed. Signed-off-by:
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Alex Elder authored
Move the mutex calls out of gsi_channel_stop_retry() and into __gsi_channel_stop(), to make the latter more semantically similar to __gsi_channel_start(). Signed-off-by:
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Jakub Kicinski authored
Vladimir Oltean says: ==================== LAG offload for Ocelot DSA switches This patch series reworks the ocelot switchdev driver such that it could share the same implementation for LAG offload as the felix DSA driver. Testing has been done in the following topology: +----------------------------------+ | Board 1 br0 | | +---------+ | | / \ | | | | | | | bond0 | | | +-----+ | | | / \ | | eno0 swp0 swp1 swp2 | +---|--------|-------|-------|-----+ | | | | +--------+ | | Cable | | Cable| |Cable Cable | | +--------+ | | | | | | +---|--------|-------|-------|-----+ | eno0 swp0 swp1 swp2 | | | \ / | | | +-----+ | | | bond0 | | | | | | \ / | | +---------+ | | Board 2 br0 | +----------------------------------+ The same script can be run on both Board 1 and Board 2 to set this up: ip link del bond0 ip link add bond0 type bond mode balance-xor miimon 1 OR ip link add bond0 type bond mode 802.3ad ip link set swp1 down && ip link set swp1 master bond0 && ip link set swp1 up ip link set swp2 down && ip link set swp2 master bond0 && ip link set swp2 up ip link del br0 ip link add br0 type bridge ip link set bond0 master br0 ip link set swp0 master br0 Then traffic can be tested between eno0 of Board 1 and eno0 of Board 2. ==================== Link: https://lore.kernel.org/r/20210205220221.255646-1-olteanv@gmail.comSigned-off-by: -
Vladimir Oltean authored
The ocelot switch has been supporting LAG offload since its initial commit, however felix could not make use of that, due to lack of a LAG abstraction in DSA. Now that we have that, let's forward DSA's calls towards the ocelot library, who will deal with setting up the bonding. Signed-off-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by:
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Vladimir Oltean authored
Given the following topology, and focusing only on Box A: Box A +----------------------------------+ | Board 1 br0 | | +---------+ | | / \ | | | | | | | bond0 | | | +-----+ | |192.168.1.1 | / \ | | eno0 swp0 swp1 swp2 | +---|--------|-------|-------|-----+ | | | | +--------+ | | Cable | | Cable| |Cable Cable | | +--------+ | | | | | | +---|--------|-------|-------|-----+ | eno0 swp0 swp1 swp2 | |192.168.1.2 | \ / | | | +-----+ | | | bond0 | | | | | | \ / | | +---------+ | | Board 2 br0 | +----------------------------------+ Box B The assisted_learning_on_cpu_port logic will see that swp0 is bridged with a "foreign interface" (bond0) and will therefore install all addresses learnt by the software bridge towards bond0 (including the address of eno0 on Box B) as static addresses towards the CPU port. But that's not what we want - bond0 is not really a "foreign interface" but one we can offload including L2 forwarding from/towards it. So we need to refine our logic for assisted learning such that, whenever we see an address learnt on a non-DSA interface, we search through the tree for any port that offloads that non-DSA interface. Some confusion might arise as to why we search through the whole tree instead of just the local switch returned by dsa_slave_dev_lower_find. Or a different angle of the same confusion: why does dsa_slave_dev_lower_find(br_dev) return a single dp that's under br_dev instead of the whole list of bridged DSA ports? To answer the second question, it should be enough to install the static FDB entry on the CPU port of a single switch in the tree, because dsa_port_fdb_add uses DSA_NOTIFIER_FDB_ADD which ensures that all other switches in the tree get notified of that address, and add the entry themselves using dsa_towards_port(). This should help understand the answer to the first question: the port returned by dsa_slave_dev_lower_find may not be on the same switch as the ports that offload the LAG. Nonetheless, if the driver implements .crosschip_lag_join and .crosschip_bridge_join as mv88e6xxx does, there still isn't any reason for trapping addresses learnt on the remote LAG towards the CPU, and we should prevent that. Signed-off-by: -
Vladimir Oltean authored
At present there is an issue when ocelot is offloading a bonding interface, but one of the links of the physical ports goes down. Traffic keeps being hashed towards that destination, and of course gets dropped on egress. Monitor the netdev notifier events emitted by the bonding driver for changes in the physical state of lower interfaces, to determine which ports are active and which ones are no longer. Then extend ocelot_get_bond_mask to return either the configured bonding interfaces, or the active ones, depending on a boolean argument. The code that does rebalancing only needs to do so among the active ports, whereas the bridge forwarding mask and the logical port IDs still need to look at the permanently bonded ports. Signed-off-by:
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Vladimir Oltean authored
It makes it a bit easier to read and understand the code that deals with balancing the 16 aggregation codes among the ports in a certain LAG. Signed-off-by:
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Vladimir Oltean authored
We can now simplify the implementation by always using ocelot_get_bond_mask to look up the other ports that are offloading the same bonding interface as us. In ocelot_set_aggr_pgids, the code had a way to uniquely iterate through LAGs. We need to achieve the same behavior by marking each LAG as visited, which we do now by using a temporary 32-bit "visited" bitmask. This is ok and we do not need dynamic memory allocation, because we know that this switch architecture will not have more than 32 ports (the PGID port masks are 32-bit anyway). Signed-off-by:
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Vladimir Oltean authored
The setup of logical port IDs is done in two places: from the inconclusively named ocelot_setup_lag and from ocelot_port_lag_leave, a function that also calls ocelot_setup_lag (which apparently does an incomplete setup of the LAG). To improve this situation, we can rename ocelot_setup_lag into ocelot_setup_logical_port_ids, and drop the "lag" argument. It will now set up the logical port IDs of all switch ports, which may be just slightly more inefficient but more maintainable. Signed-off-by:
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Vladimir Oltean authored
The index of the LAG is equal to the logical port ID that all the physical port members have, which is further equal to the index of the first physical port that is a member of the LAG. The code gets a bit carried away with logic like this: if (a == b) c = a; else c = b; which can be simplified, of course, into: c = b; (with a being port, b being lp, c being lag) This further makes the "lp" variable redundant, since we can use "lag" everywhere where "lp" (logical port) was used. So instead of a "c = b" assignment, we can do a complete deletion of b. Only one comment here: if (bond_mask) { lp = __ffs(bond_mask); ocelot->lags[lp] = 0; } lp was clobbered before, because it was used as a temporary variable to hold the new smallest port ID from the bond. Now that we don't have "lp" any longer, we'll just avoid the temporary variable and zeroize the bonding mask directly. Signed-off-by:Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by:
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Vladimir Oltean authored
Since this code should be called from pure switchdev as well as from DSA, we must find a way to determine the bonding mask not by looking directly at the net_device lowers of the bonding interface, since those could have different private structures. We keep a pointer to the bonding upper interface, if present, in struct ocelot_port. Then the bonding mask becomes the bitwise OR of all ports that have the same bonding upper interface. This adds a duplication of functionality with the current "lags" array, but the duplication will be short-lived, since further patches will remove the latter completely. Signed-off-by:
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Vladimir Oltean authored
IPv6 header information is not currently part of the entropy source for the 4-bit aggregation code used for LAG offload, even though it could be. The hardware reference manual says about these fields: ANA::AGGR_CFG.AC_IP6_TCPUDP_PORT_ENA Use IPv6 TCP/UDP port when calculating aggregation code. Configure identically for all ports. Recommended value is 1. ANA::AGGR_CFG.AC_IP6_FLOW_LBL_ENA Use IPv6 flow label when calculating AC. Configure identically for all ports. Recommended value is 1. Integration with the xmit_hash_policy of the bonding interface is TBD. Signed-off-by:
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Vladimir Oltean authored
Since switchdev/DSA exposes network interfaces that fulfill many of the same user space expectations that dedicated NICs do, it makes sense to not deny bonding interfaces with a bonding policy that we cannot offload, but instead allow the bonding driver to select the egress interface in software. Signed-off-by:
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Vladimir Oltean authored
Make ocelot's net device event handler more streamlined by structuring it in a similar way with others. The inspiration here was dsa_slave_netdevice_event. Signed-off-by:
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Vladimir Oltean authored
ocelot_netdevice_port_event treats a single event, NETDEV_CHANGEUPPER. So we can remove the check for the type of event, and rename the function to be more suggestive, since there already is a function with a very similar name of ocelot_netdevice_event. Signed-off-by:
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Jakub Kicinski authored
Vladimir Oltean says: ==================== Automatically manage DSA master interface state This patch series adds code that makes DSA open the master interface automatically whenever one user interface gets opened, either by the user, or by various networking subsystems: netconsole, nfsroot. With that in place, we can remove some of the places in the network stack where DSA-specific code was sprinkled. ==================== Link: https://lore.kernel.org/r/20210205133713.4172846-1-vladimir.oltean@nxp.comSigned-off-by:
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Vladimir Oltean authored
This reverts commit 728c0208. Since 2015 DSA has gained more integration with the network stack, we can now have the same functionality without explicitly open-coding for it: - It now opens the DSA master netdevice automatically whenever a user netdevice is opened. - The master and switch interfaces are coupled in an upper/lower hierarchy using the netdev adjacency lists. In the nfsroot example below, the interface chosen by autoconfig was swp3, and every interface except that and the DSA master, eth1, was brought down afterwards: [ 8.714215] mscc_felix 0000:00:00.5 swp0 (uninitialized): PHY [0000:00:00.3:10] driver [Microsemi GE VSC8514 SyncE] (irq=POLL) [ 8.978041] mscc_felix 0000:00:00.5 swp1 (uninitialized): PHY [0000:00:00.3:11] driver [Microsemi GE VSC8514 SyncE] (irq=POLL) [ 9.246134] mscc_felix 0000:00:00.5 swp2 (uninitialized): PHY [0000:00:00.3:12] driver [Microsemi GE VSC8514 SyncE] (irq=POLL) [ 9.486203] mscc_felix 0000:00:00.5 swp3 (uninitialized): PHY [0000:00:00.3:13] driver [Microsemi GE VSC8514 SyncE] (irq=POLL) [ 9.512827] mscc_felix 0000:00:00.5: configuring for fixed/internal link mode [ 9.521047] mscc_felix 0000:00:00.5: Link is Up - 2.5Gbps/Full - flow control off [ 9.530382] device eth1 entered promiscuous mode [ 9.535452] DSA: tree 0 setup [ 9.539777] printk: console [netcon0] enabled [ 9.544504] netconsole: network logging started [ 9.555047] fsl_enetc 0000:00:00.2 eth1: configuring for fixed/internal link mode [ 9.562790] fsl_enetc 0000:00:00.2 eth1: Link is Up - 1Gbps/Full - flow control off [ 9.564661] 8021q: adding VLAN 0 to HW filter on device bond0 [ 9.637681] fsl_enetc 0000:00:00.0 eth0: PHY [0000:00:00.0:02] driver [Qualcomm Atheros AR8031/AR8033] (irq=POLL) [ 9.655679] fsl_enetc 0000:00:00.0 eth0: configuring for inband/sgmii link mode [ 9.666611] mscc_felix 0000:00:00.5 swp0: configuring for inband/qsgmii link mode [ 9.676216] 8021q: adding VLAN 0 to HW filter on device swp0 [ 9.682086] mscc_felix 0000:00:00.5 swp1: configuring for inband/qsgmii link mode [ 9.690700] 8021q: adding VLAN 0 to HW filter on device swp1 [ 9.696538] mscc_felix 0000:00:00.5 swp2: configuring for inband/qsgmii link mode [ 9.705131] 8021q: adding VLAN 0 to HW filter on device swp2 [ 9.710964] mscc_felix 0000:00:00.5 swp3: configuring for inband/qsgmii link mode [ 9.719548] 8021q: adding VLAN 0 to HW filter on device swp3 [ 9.747811] Sending DHCP requests .. [ 12.742899] mscc_felix 0000:00:00.5 swp1: Link is Up - 1Gbps/Full - flow control rx/tx [ 12.743828] mscc_felix 0000:00:00.5 swp0: Link is Up - 1Gbps/Full - flow control off [ 12.747062] IPv6: ADDRCONF(NETDEV_CHANGE): swp1: link becomes ready [ 12.755216] fsl_enetc 0000:00:00.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx [ 12.766603] IPv6: ADDRCONF(NETDEV_CHANGE): swp0: link becomes ready [ 12.783188] mscc_felix 0000:00:00.5 swp2: Link is Up - 1Gbps/Full - flow control rx/tx [ 12.785354] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 12.799535] IPv6: ADDRCONF(NETDEV_CHANGE): swp2: link becomes ready [ 13.803141] mscc_felix 0000:00:00.5 swp3: Link is Up - 1Gbps/Full - flow control rx/tx [ 13.811646] IPv6: ADDRCONF(NETDEV_CHANGE): swp3: link becomes ready [ 15.452018] ., OK [ 15.470336] IP-Config: Got DHCP answer from 10.0.0.1, my address is 10.0.0.39 [ 15.477887] IP-Config: Complete: [ 15.481330] device=swp3, hwaddr=00:04:9f:05:de:0a, ipaddr=10.0.0.39, mask=255.255.255.0, gw=10.0.0.1 [ 15.491846] host=10.0.0.39, domain=(none), nis-domain=(none) [ 15.498429] bootserver=10.0.0.1, rootserver=10.0.0.1, rootpath= [ 15.498481] nameserver0=8.8.8.8 [ 15.627542] fsl_enetc 0000:00:00.0 eth0: Link is Down [ 15.690903] mscc_felix 0000:00:00.5 swp0: Link is Down [ 15.745216] mscc_felix 0000:00:00.5 swp1: Link is Down [ 15.800498] mscc_felix 0000:00:00.5 swp2: Link is Down Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Vladimir Oltean authored
This reverts commit 1532b977. The above commit is good and it works, however it was meant as a bugfix for stable kernels and now we have more self-contained ways in DSA to handle the situation where the DSA master must be brought up. Signed-off-by:
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Vladimir Oltean authored
This is not fixing any actual bug that I know of, but having a DSA interface that is up even when its lower (master) interface is down is one of those things that just do not sound right. Yes, DSA checks if the master is up before actually bringing the user interface up, but nobody prevents bringing the master interface down immediately afterwards... Then the user ports would attempt dev_queue_xmit on an interface that is down, and wonder what's wrong. This patch prevents that from happening. NETDEV_GOING_DOWN is the notification emitted _before_ the master actually goes down, and we are protected by the rtnl_mutex, so all is well. For those of you reading this because you were doing switch testing such as latency measurements for autonomously forwarded traffic, and you needed a controlled environment with no extra packets sent by the network stack, this patch breaks that, because now the user ports go down too, which may shut down the PHY etc. But please don't do it like that, just do instead: tc qdisc add dev eno2 clsact tc filter add dev eno2 egress flower action drop Tested with two cascaded DSA switches: $ ip link set eno2 down sja1105 spi2.0 sw0p2: Link is Down mscc_felix 0000:00:00.5 swp0: Link is Down fsl_enetc 0000:00:00.2 eno2: Link is Down Signed-off-by:
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Vladimir Oltean authored
DSA wants the master interface to be open before the user port is due to historical reasons. The promiscuity of interfaces that are down used to have issues, as referenced Lennert Buytenhek in commit df02c6ff ("dsa: fix master interface allmulti/promisc handling"). The bugfix mentioned there, commit b6c40d68 ("net: only invoke dev->change_rx_flags when device is UP"), was basically a "don't do that" approach to working around the promiscuity while down issue. Further work done by Vlad Yasevich in commit d2615bf4 ("net: core: Always propagate flag changes to interfaces") has resolved the underlying issue, and it is strictly up to the DSA and 8021q drivers now, it is no longer mandated by the networking core that the master interface must be up when changing its promiscuity. From DSA's point of view, deciding to error out in dsa_slave_open because the master isn't up is (a) a bad user experience and (b) knocking at an open door. Even if there still was an issue with promiscuity while down, DSA could still just open the master and avoid it. Doing it this way has the additional benefit that user space can now remove DSA-specific workarounds, like systemd-networkd with BindCarrier: https://github.com/systemd/systemd/issues/7478 And we can finally remove one of the 2 bullets in the "Common pitfalls using DSA setups" chapter. Tested with two cascaded DSA switches: $ ip link set sw0p2 up fsl_enetc 0000:00:00.2 eno2: configuring for fixed/internal link mode fsl_enetc 0000:00:00.2 eno2: Link is Up - 1Gbps/Full - flow control rx/tx mscc_felix 0000:00:00.5 swp0: configuring for fixed/sgmii link mode mscc_felix 0000:00:00.5 swp0: Link is Up - 1Gbps/Full - flow control off 8021q: adding VLAN 0 to HW filter on device swp0 sja1105 spi2.0 sw0p2: configuring for phy/rgmii-id link mode IPv6: ADDRCONF(NETDEV_CHANGE): eno2: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): swp0: link becomes ready Signed-off-by:
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