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2020-03-16tcp: fix stretch ACK bugs in BICPengcheng Yang1-5/+6
Changes BIC to properly handle stretch ACKs in additive increase mode by passing in the count of ACKed packets to tcp_cong_avoid_ai(). Signed-off-by: Pengcheng Yang <yangpc@wangsu.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16sfc: fix XDP-redirect in this driverJesper Dangaard Brouer4-8/+15
XDP-redirect is broken in this driver sfc. XDP_REDIRECT requires tailroom for skb_shared_info when creating an SKB based on the redirected xdp_frame (both in cpumap and veth). The fix requires some initial explaining. The driver uses RX page-split when possible. It reserves the top 64 bytes in the RX-page for storing dma_addr (struct efx_rx_page_state). It also have the XDP recommended headroom of XDP_PACKET_HEADROOM (256 bytes). As it doesn't reserve any tailroom, it can still fit two standard MTU (1500) frames into one page. The sizeof struct skb_shared_info in 320 bytes. Thus drivers like ixgbe and i40e, reduce their XDP headroom to 192 bytes, which allows them to fit two frames with max 1536 bytes into a 4K page (192+1536+320=2048). The fix is to reduce this drivers headroom to 128 bytes and add the 320 bytes tailroom. This account for reserved top 64 bytes in the page, and still fit two frame in a page for normal MTUs. We must never go below 128 bytes of headroom for XDP, as one cacheline is for xdp_frame area and next cacheline is reserved for metadata area. Fixes: eb9a36be7f3e ("sfc: perform XDP processing on received packets") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16remoteproc: clean up notification configAlex Elder2-4/+2
Rearrange the config files for remoteproc and IPA to fix their interdependencies. First, have CONFIG_QCOM_Q6V5_MSS select QCOM_Q6V5_IPA_NOTIFY so the notification code is built regardless of whether IPA needs it. Next, represent QCOM_IPA as being dependent on QCOM_Q6V5_MSS rather than setting its value to match QCOM_Q6V5_COMMON (which is selected by QCOM_Q6V5_MSS). Drop all dependencies from QCOM_Q6V5_IPA_NOTIFY. The notification code will be built whenever QCOM_Q6V5_MSS is set, and it has no other dependencies. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16net: kcm: kcmproc.c: Fix RCU list suspicious usage warningMadhuparna Bhowmik1-1/+1
This path fixes the suspicious RCU usage warning reported by kernel test robot. net/kcm/kcmproc.c:#RCU-list_traversed_in_non-reader_section There is no need to use list_for_each_entry_rcu() in kcm_stats_seq_show() as the list is always traversed under knet->mutex held. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16qede: remove some unused code in function qede_selftest_receive_trafficZheng Zengkai1-12/+1
Remove set but not used variables 'sw_comp_cons' and 'hw_comp_cons' to fix gcc '-Wunused-but-set-variable' warning: drivers/net/ethernet/qlogic/qede/qede_ethtool.c: In function qede_selftest_receive_traffic: drivers/net/ethernet/qlogic/qede/qede_ethtool.c:1569:20: warning: variable sw_comp_cons set but not used [-Wunused-but-set-variable] drivers/net/ethernet/qlogic/qede/qede_ethtool.c: In function qede_selftest_receive_traffic: drivers/net/ethernet/qlogic/qede/qede_ethtool.c:1569:6: warning: variable hw_comp_cons set but not used [-Wunused-but-set-variable] After removing 'hw_comp_cons',the memory barrier 'rmb()' and its comments become useless, so remove them as well. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16net: sched: set the hw_stats_type in pedit loopJiri Pirko1-0/+1
For a single pedit action, multiple offload entries may be used. Set the hw_stats_type to all of them. Fixes: 44f865801741 ("sched: act: allow user to specify type of HW stats for a filter") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16net: stmmac: use readl_poll_timeout() function in dwmac4_dma_reset()Dejin Zheng1-11/+4
The dwmac4_dma_reset() function use an open coded of readl_poll_timeout(). Replace the open coded handling with the proper function. Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16net: stmmac: use readl_poll_timeout() function in init_systime()Dejin Zheng1-11/+4
The init_systime() function use an open coded of readl_poll_timeout(). Replace the open coded handling with the proper function. Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16chcr: remove set but not used variable 'status'YueHaibing1-2/+1
drivers/crypto/chelsio/chcr_ktls.c: In function chcr_ktls_cpl_set_tcb_rpl: drivers/crypto/chelsio/chcr_ktls.c:662:11: warning: variable status set but not used [-Wunused-but-set-variable] commit 8a30923e1598 ("cxgb4/chcr: Save tx keys and handle HW response") involved this unused variable, remove it. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16macsec: Netlink support of XPN cipher suites (IEEE 802.1AEbw)Era Mayflower3-15/+157
Netlink support of extended packet number cipher suites, allows adding and updating XPN macsec interfaces. Added support in: * Creating interfaces with GCM-AES-XPN-128 and GCM-AES-XPN-256 suites. * Setting and getting 64bit packet numbers with of SAs. * Setting (only on SA creation) and getting ssci of SAs. * Setting salt when installing a SAK. Added 2 cipher suite identifiers according to 802.1AE-2018 table 14-1: * MACSEC_CIPHER_ID_GCM_AES_XPN_128 * MACSEC_CIPHER_ID_GCM_AES_XPN_256 In addition, added 2 new netlink attribute types: * MACSEC_SA_ATTR_SSCI * MACSEC_SA_ATTR_SALT Depends on: macsec: Support XPN frame handling - IEEE 802.1AEbw. Signed-off-by: Era Mayflower <mayflowerera@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-16macsec: Support XPN frame handling - IEEE 802.1AEbwEra Mayflower2-39/+136
Support extended packet number cipher suites (802.1AEbw) frames handling. This does not include the needed netlink patches. * Added xpn boolean field to `struct macsec_secy`. * Added ssci field to `struct_macsec_tx_sa` (802.1AE figure 10-5). * Added ssci field to `struct_macsec_rx_sa` (802.1AE figure 10-5). * Added salt field to `struct macsec_key` (802.1AE 10.7 NOTE 1). * Created pn_t type for easy access to lower and upper halves. * Created salt_t type for easy access to the "ssci" and "pn" parts. * Created `macsec_fill_iv_xpn` function to create IV in XPN mode. * Support in PN recovery and preliminary replay check in XPN mode. In addition, according to IEEE 802.1AEbw figure 10-5, the PN of incoming frame can be 0 when XPN cipher suite is used, so fixed the function `macsec_validate_skb` to fail on PN=0 only if XPN is off. Signed-off-by: Era Mayflower <mayflowerera@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: use PHY_DETECT in mac_link_up/mac_link_downRussell King1-24/+29
Use the status of the PHY_DETECT bit to determine whether we need to force the MAC settings in mac_link_up() and mac_link_down(). Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: remove port_link_state functionsRussell King4-232/+0
The port_link_state method is only used by mv88e6xxx_port_setup_mac(), which is now only called during port setup, rather than also being called via phylink's mac_config method. Remove this now unnecessary optimisation, which allows us to remove the port_link_state methods as well. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: combine port_set_speed and port_set_duplexRussell King4-145/+107
Setting the speed independently of duplex makes little sense; the two parameters result from negotiation or fixed setup, and may have inter- dependencies. Moreover, they are always controlled via the same register - having them split means we have to read-modify-write this register twice. Combine the two operations into a single port_set_speed_duplex() operation. Not only is this more efficient, it reduces the size of the code as well. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: fix Serdes link changesRussell King2-21/+13
phylink_mac_change() is supposed to be called with a 'false' argument if the link has gone down since it was last reported up; this is to ensure that link events along with renegotiation events are always correctly reported to userspace. Read the BMSR once when we have an interrupt, and report the link latched status to phylink via phylink_mac_change(). phylink will deal automatically with re-reading the link state once it has processed the link-down event. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: extend phylink to Serdes PHYsRussell King4-74/+480
Extend the mv88e6xxx phylink implementation down to Serdes PHYs, which handle the PCS layer of such links. - Implement phylink PCS link state reading, so that we can provide ethtool with the linkmodes and link speed in the expected manner. Note: this will only be called for in-band negotiation, which is only supported by the serdes interfaces. - Implement phylink PCS configuration, so that the in-band AN and advertisement can be configured. - Implement phylink PCS negotiation restart, so that the in-band AN can be restarted. - Implement phylink PCS link up, so that when operating out-of-band, the Serdes can be configured for the appropriate fixed speed mode. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: configure interface settings in mac_configRussell King1-32/+35
Only configure the interface settings in mac_config(), leaving the speed and duplex settings to mac_link_up to deal with. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: mv88e6xxx: use BMCR definitions for serdes control registerRussell King2-14/+5
The SGMII/1000base-X serdes register set is a clause 22 register set offset at 0x2000 in the PHYXS device. Rather than inventing our own defintions, use those that already exist, and name the register MV88E6390_SGMII_BMCR. Also remove the unused MV88E6390_SGMII_STATUS definitions. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: dsa: warn if phylink_mac_link_state returns errorRussell King1-1/+6
Issue a warning to the kernel log if phylink_mac_link_state() returns an error. This should not occur, but let's make it visible. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: mii: add linkmode_adv_to_mii_adv_x()Russell King1-0/+20
Add a helper to convert a linkmode advertisement to a clause 37 advertisement value for 1000base-x and 2500base-x. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: mii: convert mii_lpa_to_ethtool_lpa_x() to linkmode variantRussell King1-18/+19
Add a LPA to linkmode decoder for 1000BASE-X protocols; this decoder only provides the modify semantics similar to other such decoders. This replaces the unused mii_lpa_to_ethtool_lpa_x() helper. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15cdc_ncm: Fix the build warningAlexander Bersenev1-1/+1
The ndp32->wLength is two bytes long, so replace cpu_to_le32 with cpu_to_le16. Fixes: 0fa81b304a79 ("cdc_ncm: Implement the 32-bit version of NCM Transfer Block") Signed-off-by: Alexander Bersenev <bay@hackerdom.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15mptcp: drop unneeded checksPaolo Abeni2-23/+9
After the previous patch subflow->conn is always != NULL and is never changed. We can drop a bunch of now unneeded checks. v1 -> v2: - rebased on top of commit 2398e3991bda ("mptcp: always include dack if possible.") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15mptcp: create msk earlyPaolo Abeni4-80/+70
This change moves the mptcp socket allocation from mptcp_accept() to subflow_syn_recv_sock(), so that subflow->conn is now always set for the non fallback scenario. It allows cleaning up a bit mptcp_accept() reducing the additional locking and will allow fourther cleanup in the next patch. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: stmmac: platform: convert to devm_platform_ioremap_resourceDejin Zheng1-4/+1
Use devm_platform_ioremap_resource() to simplify code, which contains platform_get_resource and devm_ioremap_resource. Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15net: mscc: ocelot: adjust maxlen on NPI port, not CPUVladimir Oltean1-1/+1
Being a non-physical port, the CPU port does not have an ocelot_port structure, so the ocelot_port_writel call inside the ocelot_port_set_maxlen() function would access data behind a NULL pointer. This is a patch for net-next only, the net tree boots fine, the bug was introduced during the net -> net-next merge. Fixes: 1d3435793123 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net") Fixes: a8015ded89ad ("net: mscc: ocelot: properly account for VLAN header length when setting MRU") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15tipc: add NULL pointer check to prevent kernel oopsHoang Le1-2/+10
Calling: tipc_node_link_down()-> - tipc_node_write_unlock()->tipc_mon_peer_down() - tipc_mon_peer_down() just after disabling bearer could be caused kernel oops. Fix this by adding a sanity check to make sure valid memory access. Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-15tipc: simplify trivial boolean returnHoang Le1-3/+0
Checking and returning 'true' boolean is useless as it will be returning at end of function Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au> Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: via: reject unsupported coalescing paramsJakub Kicinski1-0/+2
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: sxgbe: reject unsupported coalescing paramsJakub Kicinski1-0/+1
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: r8169: reject unsupported coalescing paramsJakub Kicinski1-0/+2
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: qlnic: let core reject the unsupported coalescing parametersJakub Kicinski1-18/+5
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver already correctly rejected almost all unsupported parameters (missing sample_rate_interval). As a side effect of these changes the error code for unsupported params changes from EINVAL to EOPNOTSUPP. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: qede: reject unsupported coalescing paramsJakub Kicinski1-0/+2
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: netxen: let core reject the unsupported coalescing parametersJakub Kicinski1-18/+3
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. As a side effect of these changes the error code for unsupported params changes from EINVAL to EOPNOTSUPP. The driver was missing a check for rate_sample_interval. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: nixge: let core reject the unsupported coalescing parametersJakub Kicinski1-21/+1
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver correctly rejects all unsupported parameters, no functional changes. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: myri10ge: reject unsupported coalescing paramsJakub Kicinski1-0/+1
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: sky2: reject unsupported coalescing paramsJakub Kicinski1-0/+4
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: skge: reject unsupported coalescing paramsJakub Kicinski1-0/+1
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: octeontx2-pf: let core reject the unsupported coalescing parametersJakub Kicinski1-11/+2
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver correctly rejects all unsupported parameters, no functional changes. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: mvpp2: reject unsupported coalescing paramsJakub Kicinski1-0/+2
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Matteo Croce <mcroce@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: mvneta: reject unsupported coalescing paramsJakub Kicinski1-0/+2
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: mv643xx_eth: reject unsupported coalescing paramsJakub Kicinski1-0/+1
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: jme: reject unsupported coalescing paramsJakub Kicinski1-0/+3
Set ethtool_ops->supported_coalesce_params to let the core reject unsupported coalescing parameters. This driver did not previously reject unsupported parameters. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: phy: mscc: fix header defines and descriptionsAntoine Tenart3-12/+12
Cosmetic commit fixing the MSCC PHY header defines and descriptions, which were referring the to MSCC Ocelot MAC driver (see drivers/net/ethernet/mscc/). Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: phy: mscc: split the driver into separate filesAntoine Tenart5-1462/+1515
This patch splits the MSCC driver into separate files, per functionality, to improve readability and maintenance as the codebase grew a lot. The MACsec code is moved to a dedicated mscc_macsec.c file, the mscc.c file is renamed to mscc_main.c to keep the driver binary to be named mscc and common definition are put into a new mscc.h header. Most of the code was just moved around, except for a few exceptions: - Header inclusions were reworked to only keep what's needed. - Three helpers were created in the MACsec code, to avoid #ifdef's in the main C file: vsc8584_macsec_init, vsc8584_handle_macsec_interrupt and vsc8584_config_macsec_intr. The patch should not introduce any functional modification. Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: phy: move the mscc driver to its own directoryAntoine Tenart6-1/+6
The MSCC PHY driver is growing, with lots of space consuming features (firmware support, full initialization, MACsec...). It's becoming hard to read and navigate in its source code. This patch moves the MSCC driver to its own directory, without modifying anything, as a preparation for splitting up its features into dedicated files. Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14selftests: mlxsw: RED: Test RED ECN nodrop offloadPetr Machata3-8/+61
Extend RED testsuite to cover the new nodrop mode of RED-ECN. This test is really similar to ECN test, diverging only in the last step, where UDP traffic should go to backlog instead of being dropped. Thus extract a common helper, ecn_test_common(), make do_ecn_test() into a relatively simple wrapper, and add another one, do_ecn_nodrop_test(). Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14selftests: qdiscs: RED: Add nodrop testsPetr Machata1-0/+68
Add tests for the new "nodrop" flag. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14mlxsw: spectrum_qdisc: Offload RED ECN nodrop modePetr Machata1-4/+5
RED ECN nodrop mode means that non-ECT traffic should not be early-dropped, but enqueued normally instead. In Spectrum systems, this is achieved by disabling CWTPM.ew (enable WRED) for a given traffic class. So far CWTPM.ew was unconditionally enabled. Instead disable it when the RED qdisc is in nodrop mode. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-14net: sched: RED: Introduce an ECN nodrop modePetr Machata4-6/+32
When the RED Qdisc is currently configured to enable ECN, the RED algorithm is used to decide whether a certain SKB should be marked. If that SKB is not ECN-capable, it is early-dropped. It is also possible to keep all traffic in the queue, and just mark the ECN-capable subset of it, as appropriate under the RED algorithm. Some switches support this mode, and some installations make use of it. To that end, add a new RED flag, TC_RED_NODROP. When the Qdisc is configured with this flag, non-ECT traffic is enqueued instead of being early-dropped. Signed-off-by: Petr Machata <petrm@mellanox.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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