#
a23e1966 |
| 15-Jul-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.11 merge window.
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Revision tags: v6.10, v6.10-rc7, v6.10-rc6, v6.10-rc5, v6.10-rc4, v6.10-rc3, v6.10-rc2 |
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6f47c7ae |
| 28-May-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.9' into next
Sync up with the mainline to bring in the new cleanup API.
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Revision tags: v6.10-rc1 |
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60a2f25d |
| 16-May-2024 |
Tvrtko Ursulin <tursulin@ursulin.net> |
Merge drm/drm-next into drm-intel-gt-next
Some display refactoring patches are needed in order to allow conflict- less merging.
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
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Revision tags: v6.9, v6.9-rc7, v6.9-rc6, v6.9-rc5, v6.9-rc4, v6.9-rc3, v6.9-rc2, v6.9-rc1, v6.8, v6.8-rc7, v6.8-rc6, v6.8-rc5, v6.8-rc4, v6.8-rc3, v6.8-rc2, v6.8-rc1 |
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#
0ea5c948 |
| 15-Jan-2024 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Backmerge to bring Xe driver to drm-intel-next.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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#
03c11eb3 |
| 14-Feb-2024 |
Ingo Molnar <mingo@kernel.org> |
Merge tag 'v6.8-rc4' into x86/percpu, to resolve conflicts and refresh the branch
Conflicts: arch/x86/include/asm/percpu.h arch/x86/include/asm/text-patching.h
Signed-off-by: Ingo Molnar <mingo@k
Merge tag 'v6.8-rc4' into x86/percpu, to resolve conflicts and refresh the branch
Conflicts: arch/x86/include/asm/percpu.h arch/x86/include/asm/text-patching.h
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Revision tags: v6.7, v6.7-rc8, v6.7-rc7 |
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#
ab1c2470 |
| 19-Dec-2023 |
Arnaldo Carvalho de Melo <acme@redhat.com> |
Merge remote-tracking branch 'torvalds/master' into perf-tools-next
To pick up fixes that went thru perf-tools for v6.7 and to get in sync with upstream to check for drift in the copies of headers,
Merge remote-tracking branch 'torvalds/master' into perf-tools-next
To pick up fixes that went thru perf-tools for v6.7 and to get in sync with upstream to check for drift in the copies of headers, etc.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Revision tags: v6.7-rc6, v6.7-rc5, v6.7-rc4, v6.7-rc3, v6.7-rc2 |
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#
3bf3e21c |
| 15-Nov-2023 |
Maxime Ripard <mripard@kernel.org> |
Merge drm/drm-next into drm-misc-next
Let's kickstart the v6.8 release cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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#
5d2d4a9f |
| 15-Nov-2023 |
Peter Zijlstra <peterz@infradead.org> |
Merge branch 'tip/perf/urgent'
Avoid conflicts, base on fixes.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
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Revision tags: v6.7-rc1 |
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#
89ed67ef |
| 31-Oct-2023 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'net-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski: "Core & protocols:
- Support usec resolution of TCP timest
Merge tag 'net-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski: "Core & protocols:
- Support usec resolution of TCP timestamps, enabled selectively by a route attribute.
- Defer regular TCP ACK while processing socket backlog, try to send a cumulative ACK at the end. Increase single TCP flow performance on a 200Gbit NIC by 20% (100Gbit -> 120Gbit).
- The Fair Queuing (FQ) packet scheduler: - add built-in 3 band prio / WRR scheduling - support bypass if the qdisc is mostly idle (5% speed up for TCP RR) - improve inactive flow reporting - optimize the layout of structures for better cache locality
- Support TCP Authentication Option (RFC 5925, TCP-AO), a more modern replacement for the old MD5 option.
- Add more retransmission timeout (RTO) related statistics to TCP_INFO.
- Support sending fragmented skbs over vsock sockets.
- Make sure we send SIGPIPE for vsock sockets if socket was shutdown().
- Add sysctl for ignoring lower limit on lifetime in Router Advertisement PIO, based on an in-progress IETF draft.
- Add sysctl to control activation of TCP ping-pong mode.
- Add sysctl to make connection timeout in MPTCP configurable.
- Support rcvlowat and notsent_lowat on MPTCP sockets, to help apps limit the number of wakeups.
- Support netlink GET for MDB (multicast forwarding), allowing user space to request a single MDB entry instead of dumping the entire table.
- Support selective FDB flushing in the VXLAN tunnel driver.
- Allow limiting learned FDB entries in bridges, prevent OOM attacks.
- Allow controlling via configfs netconsole targets which were created via the kernel cmdline at boot, rather than via configfs at runtime.
- Support multiple PTP timestamp event queue readers with different filters.
- MCTP over I3C.
BPF:
- Add new veth-like netdevice where BPF program defines the logic of the xmit routine. It can operate in L3 and L2 mode.
- Support exceptions - allow asserting conditions which should never be true but are hard for the verifier to infer. With some extra flexibility around handling of the exit / failure:
https://lwn.net/Articles/938435/
- Add support for local per-cpu kptr, allow allocating and storing per-cpu objects in maps. Access to those objects operates on the value for the current CPU.
This allows to deprecate local one-off implementations of per-CPU storage like BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE maps.
- Extend cgroup BPF sockaddr hooks for UNIX sockets. The use case is for systemd to re-implement the LogNamespace feature which allows running multiple instances of systemd-journald to process the logs of different services.
- Enable open-coded task_vma iteration, after maple tree conversion made it hard to directly walk VMAs in tracing programs.
- Add open-coded task, css_task and css iterator support. One of the use cases is customizable OOM victim selection via BPF.
- Allow source address selection with bpf_*_fib_lookup().
- Add ability to pin BPF timer to the current CPU.
- Prevent creation of infinite loops by combining tail calls and fentry/fexit programs.
- Add missed stats for kprobes to retrieve the number of missed kprobe executions and subsequent executions of BPF programs.
- Inherit system settings for CPU security mitigations.
- Add BPF v4 CPU instruction support for arm32 and s390x.
Changes to common code:
- overflow: add DEFINE_FLEX() for on-stack definition of structs with flexible array members.
- Process doc update with more guidance for reviewers.
Driver API:
- Simplify locking in WiFi (cfg80211 and mac80211 layers), use wiphy mutex in most places and remove a lot of smaller locks.
- Create a common DPLL configuration API. Allow configuring and querying state of PLL circuits used for clock syntonization, in network time distribution.
- Unify fragmented and full page allocation APIs in page pool code. Let drivers be ignorant of PAGE_SIZE.
- Rework PHY state machine to avoid races with calls to phy_stop().
- Notify DSA drivers of MAC address changes on user ports, improve correctness of offloads which depend on matching port MAC addresses.
- Allow antenna control on injected WiFi frames.
- Reduce the number of variants of napi_schedule().
- Simplify error handling when composing devlink health messages.
Misc:
- A lot of KCSAN data race "fixes", from Eric.
- A lot of __counted_by() annotations, from Kees.
- A lot of strncpy -> strscpy and printf format fixes.
- Replace master/slave terminology with conduit/user in DSA drivers.
- Handful of KUnit tests for netdev and WiFi core.
Removed:
- AppleTalk COPS.
- AppleTalk ipddp.
- TI AR7 CPMAC Ethernet driver.
Drivers:
- Ethernet high-speed NICs: - Intel (100G, ice, idpf): - add a driver for the Intel E2000 IPUs - make CRC/FCS stripping configurable - cross-timestamping for E823 devices - basic support for E830 devices - use aux-bus for managing client drivers - i40e: report firmware versions via devlink - nVidia/Mellanox: - support 4-port NICs - increase max number of channels to 256 - optimize / parallelize SF creation flow - Broadcom (bnxt): - enhance NIC temperature reporting - support PAM4 speeds and lane configuration - Marvell OcteonTX2: - PTP pulse-per-second output support - enable hardware timestamping for VFs - Solarflare/AMD: - conntrack NAT offload and offload for tunnels - Wangxun (ngbe/txgbe): - expose HW statistics - Pensando/AMD: - support PCI level reset - narrow down the condition under which skbs are linearized - Netronome/Corigine (nfp): - support CHACHA20-POLY1305 crypto in IPsec offload
- Ethernet NICs embedded, slower, virtual: - Synopsys (stmmac): - add Loongson-1 SoC support - enable use of HW queues with no offload capabilities - enable PPS input support on all 5 channels - increase TX coalesce timer to 5ms - RealTek USB (r8152): improve efficiency of Rx by using GRO frags - xen: support SW packet timestamping - add drivers for implementations based on TI's PRUSS (AM64x EVM)
- nVidia/Mellanox Ethernet datacenter switches: - avoid poor HW resource use on Spectrum-4 by better block selection for IPv6 multicast forwarding and ordering of blocks in ACL region
- Ethernet embedded switches: - Microchip: - support configuring the drive strength for EMI compliance - ksz9477: partial ACL support - ksz9477: HSR offload - ksz9477: Wake on LAN - Realtek: - rtl8366rb: respect device tree config of the CPU port
- Ethernet PHYs: - support Broadcom BCM5221 PHYs - TI dp83867: support hardware LED blinking
- CAN: - add support for Linux-PHY based CAN transceivers - at91_can: clean up and use rx-offload helpers
- WiFi: - MediaTek (mt76): - new sub-driver for mt7925 USB/PCIe devices - HW wireless <> Ethernet bridging in MT7988 chips - mt7603/mt7628 stability improvements - Qualcomm (ath12k): - WCN7850: - enable 320 MHz channels in 6 GHz band - hardware rfkill support - enable IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS to make scan faster - read board data variant name from SMBIOS - QCN9274: mesh support - RealTek (rtw89): - TDMA-based multi-channel concurrency (MCC) - Silicon Labs (wfx): - Remain-On-Channel (ROC) support
- Bluetooth: - ISO: many improvements for broadcast support - mark BCM4378/BCM4387 as BROKEN_LE_CODED - add support for QCA2066 - btmtksdio: enable Bluetooth wakeup from suspend"
* tag 'net-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1816 commits) net: pcs: xpcs: Add 2500BASE-X case in get state for XPCS drivers net: bpf: Use sockopt_lock_sock() in ip_sock_set_tos() net: mana: Use xdp_set_features_flag instead of direct assignment vxlan: Cleanup IFLA_VXLAN_PORT_RANGE entry in vxlan_get_size() iavf: delete the iavf client interface iavf: add a common function for undoing the interrupt scheme iavf: use unregister_netdev iavf: rely on netdev's own registered state iavf: fix the waiting time for initial reset iavf: in iavf_down, don't queue watchdog_task if comms failed iavf: simplify mutex_trylock+sleep loops iavf: fix comments about old bit locks doc/netlink: Update schema to support cmd-cnt-name and cmd-max-name tools: ynl: introduce option to process unknown attributes or types ipvlan: properly track tx_errors netdevsim: Block until all devices are released nfp: using napi_build_skb() to replace build_skb() net: dsa: microchip: ksz9477: Fix spelling mistake "Enery" -> "Energy" net: dsa: microchip: Ensure Stable PME Pin State for Wake-on-LAN net: dsa: microchip: Refactor switch shutdown routine for WoL preparation ...
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Revision tags: v6.6, v6.6-rc7, v6.6-rc6 |
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#
2c6370a1 |
| 14-Oct-2023 |
Muhammad Muzammil <m.muzzammilashraf@gmail.com> |
drivers: net: wwan: iosm: Fixed multiple typos in multiple files
iosm_ipc_chnl_cfg.h: Fixed typo iosm_ipc_imem_ops.h: Fixed typo iosm_ipc_mux.h: Fixed typo iosm_ipc_pm.h: Fixed typo iosm_ipc_port.h:
drivers: net: wwan: iosm: Fixed multiple typos in multiple files
iosm_ipc_chnl_cfg.h: Fixed typo iosm_ipc_imem_ops.h: Fixed typo iosm_ipc_mux.h: Fixed typo iosm_ipc_pm.h: Fixed typo iosm_ipc_port.h: Fixed typo iosm_ipc_trace.h: Fixed typo
Signed-off-by: Muhammad Muzammil <m.muzzammilashraf@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20231014121407.10012-1-m.muzzammilashraf@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Revision tags: v6.6-rc5, v6.6-rc4, v6.6-rc3, v6.6-rc2, v6.6-rc1, v6.5, v6.5-rc7, v6.5-rc6, v6.5-rc5, v6.5-rc4, v6.5-rc3, v6.5-rc2, v6.5-rc1, v6.4, v6.4-rc7, v6.4-rc6, v6.4-rc5, v6.4-rc4, v6.4-rc3, v6.4-rc2, v6.4-rc1, v6.3, v6.3-rc7, v6.3-rc6, v6.3-rc5, v6.3-rc4, v6.3-rc3, v6.3-rc2, v6.3-rc1, v6.2, v6.2-rc8, v6.2-rc7, v6.2-rc6, v6.2-rc5, v6.2-rc4, v6.2-rc3, v6.2-rc2, v6.2-rc1, v6.1, v6.1-rc8, v6.1-rc7, v6.1-rc6, v6.1-rc5, v6.1-rc4, v6.1-rc3, v6.1-rc2, v6.1-rc1, v6.0, v6.0-rc7, v6.0-rc6, v6.0-rc5, v6.0-rc4, v6.0-rc3, v6.0-rc2, v6.0-rc1, v5.19, v5.19-rc8, v5.19-rc7, v5.19-rc6, v5.19-rc5, v5.19-rc4, v5.19-rc3, v5.19-rc2, v5.19-rc1, v5.18, v5.18-rc7, v5.18-rc6, v5.18-rc5, v5.18-rc4, v5.18-rc3, v5.18-rc2, v5.18-rc1, v5.17, v5.17-rc8, v5.17-rc7, v5.17-rc6, v5.17-rc5, v5.17-rc4, v5.17-rc3, v5.17-rc2, v5.17-rc1 |
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#
762f99f4 |
| 15-Jan-2022 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 5.17 merge window.
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Revision tags: v5.16, v5.16-rc8, v5.16-rc7, v5.16-rc6, v5.16-rc5 |
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5d8dfaa7 |
| 09-Dec-2021 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v5.15' into next
Sync up with the mainline to get the latest APIs and DT bindings.
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Revision tags: v5.16-rc4, v5.16-rc3, v5.16-rc2, v5.16-rc1, v5.15, v5.15-rc7, v5.15-rc6, v5.15-rc5, v5.15-rc4, v5.15-rc3, v5.15-rc2, v5.15-rc1 |
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#
71af75b6 |
| 30-Aug-2021 |
Petr Mladek <pmladek@suse.com> |
Merge branch 'for-5.15-printk-index' into for-linus
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Revision tags: v5.14 |
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#
46466ae3 |
| 26-Aug-2021 |
Ingo Molnar <mingo@kernel.org> |
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Revision tags: v5.14-rc7 |
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#
c87866ed |
| 17-Aug-2021 |
Ingo Molnar <mingo@kernel.org> |
Merge tag 'v5.14-rc6' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Revision tags: v5.14-rc6, v5.14-rc5, v5.14-rc4 |
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#
ca31fef1 |
| 27-Jul-2021 |
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> |
Backmerge remote-tracking branch 'drm/drm-next' into drm-misc-next
Required bump from v5.13-rc3 to v5.14-rc3, and to pick up sysfb compilation fixes.
Signed-off-by: Maarten Lankhorst <maarten.lankh
Backmerge remote-tracking branch 'drm/drm-next' into drm-misc-next
Required bump from v5.13-rc3 to v5.14-rc3, and to pick up sysfb compilation fixes.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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Revision tags: v5.14-rc3, v5.14-rc2 |
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#
611ac726 |
| 13-Jul-2021 |
Rodrigo Vivi <rodrigo.vivi@intel.com> |
Merge drm/drm-next into drm-intel-gt-next
Catching up with 5.14-rc1 and also preparing for a needed common topic branch for the "Minor revid/stepping and workaround cleanup"
Reference: https://patc
Merge drm/drm-next into drm-intel-gt-next
Catching up with 5.14-rc1 and also preparing for a needed common topic branch for the "Minor revid/stepping and workaround cleanup"
Reference: https://patchwork.freedesktop.org/series/92299/ Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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#
d5bfbad2 |
| 13-Jul-2021 |
Rodrigo Vivi <rodrigo.vivi@intel.com> |
Merge drm/drm-next into drm-intel-next
Catching up with 5.14-rc1
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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#
353b7a55 |
| 27-Jul-2021 |
Tony Lindgren <tony@atomide.com> |
Merge branch 'fixes-v5.14' into fixes
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Revision tags: v5.14-rc1 |
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#
dbe69e43 |
| 01-Jul-2021 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski: "Core:
- BPF: - add syscall program type and libbpf
Merge tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski: "Core:
- BPF: - add syscall program type and libbpf support for generating instructions and bindings for in-kernel BPF loaders (BPF loaders for BPF), this is a stepping stone for signed BPF programs - infrastructure to migrate TCP child sockets from one listener to another in the same reuseport group/map to improve flexibility of service hand-off/restart - add broadcast support to XDP redirect
- allow bypass of the lockless qdisc to improving performance (for pktgen: +23% with one thread, +44% with 2 threads)
- add a simpler version of "DO_ONCE()" which does not require jump labels, intended for slow-path usage
- virtio/vsock: introduce SOCK_SEQPACKET support
- add getsocketopt to retrieve netns cookie
- ip: treat lowest address of a IPv4 subnet as ordinary unicast address allowing reclaiming of precious IPv4 addresses
- ipv6: use prandom_u32() for ID generation
- ip: add support for more flexible field selection for hashing across multi-path routes (w/ offload to mlxsw)
- icmp: add support for extended RFC 8335 PROBE (ping)
- seg6: add support for SRv6 End.DT46 behavior
- mptcp: - DSS checksum support (RFC 8684) to detect middlebox meddling - support Connection-time 'C' flag - time stamping support
- sctp: packetization Layer Path MTU Discovery (RFC 8899)
- xfrm: speed up state addition with seq set
- WiFi: - hidden AP discovery on 6 GHz and other HE 6 GHz improvements - aggregation handling improvements for some drivers - minstrel improvements for no-ack frames - deferred rate control for TXQs to improve reaction times - switch from round robin to virtual time-based airtime scheduler
- add trace points: - tcp checksum errors - openvswitch - action execution, upcalls - socket errors via sk_error_report
Device APIs:
- devlink: add rate API for hierarchical control of max egress rate of virtual devices (VFs, SFs etc.)
- don't require RCU read lock to be held around BPF hooks in NAPI context
- page_pool: generic buffer recycling
New hardware/drivers:
- mobile: - iosm: PCIe Driver for Intel M.2 Modem - support for Qualcomm MSM8998 (ipa)
- WiFi: Qualcomm QCN9074 and WCN6855 PCI devices
- sparx5: Microchip SparX-5 family of Enterprise Ethernet switches
- Mellanox BlueField Gigabit Ethernet (control NIC of the DPU)
- NXP SJA1110 Automotive Ethernet 10-port switch
- Qualcomm QCA8327 switch support (qca8k)
- Mikrotik 10/25G NIC (atl1c)
Driver changes:
- ACPI support for some MDIO, MAC and PHY devices from Marvell and NXP (our first foray into MAC/PHY description via ACPI)
- HW timestamping (PTP) support: bnxt_en, ice, sja1105, hns3, tja11xx
- Mellanox/Nvidia NIC (mlx5) - NIC VF offload of L2 bridging - support IRQ distribution to Sub-functions
- Marvell (prestera): - add flower and match all - devlink trap - link aggregation
- Netronome (nfp): connection tracking offload
- Intel 1GE (igc): add AF_XDP support
- Marvell DPU (octeontx2): ingress ratelimit offload
- Google vNIC (gve): new ring/descriptor format support
- Qualcomm mobile (rmnet & ipa): inline checksum offload support
- MediaTek WiFi (mt76) - mt7915 MSI support - mt7915 Tx status reporting - mt7915 thermal sensors support - mt7921 decapsulation offload - mt7921 enable runtime pm and deep sleep
- Realtek WiFi (rtw88) - beacon filter support - Tx antenna path diversity support - firmware crash information via devcoredump
- Qualcomm WiFi (wcn36xx) - Wake-on-WLAN support with magic packets and GTK rekeying
- Micrel PHY (ksz886x/ksz8081): add cable test support"
* tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2168 commits) tcp: change ICSK_CA_PRIV_SIZE definition tcp_yeah: check struct yeah size at compile time gve: DQO: Fix off by one in gve_rx_dqo() stmmac: intel: set PCI_D3hot in suspend stmmac: intel: Enable PHY WOL option in EHL net: stmmac: option to enable PHY WOL with PMT enabled net: say "local" instead of "static" addresses in ndo_dflt_fdb_{add,del} net: use netdev_info in ndo_dflt_fdb_{add,del} ptp: Set lookup cookie when creating a PTP PPS source. net: sock: add trace for socket errors net: sock: introduce sk_error_report net: dsa: replay the local bridge FDB entries pointing to the bridge dev too net: dsa: ensure during dsa_fdb_offload_notify that dev_hold and dev_put are on the same dev net: dsa: include fdb entries pointing to bridge in the host fdb list net: dsa: include bridge addresses which are local in the host fdb list net: dsa: sync static FDB entries on foreign interfaces to hardware net: dsa: install the host MDB and FDB entries in the master's RX filter net: dsa: reference count the FDB addresses at the cross-chip notifier level net: dsa: introduce a separate cross-chip notifier type for host FDBs net: dsa: reference count the MDB entries at the cross-chip notifier level ...
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Revision tags: v5.13, v5.13-rc7, v5.13-rc6 |
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#
a212d9f3 |
| 13-Jun-2021 |
David S. Miller <davem@davemloft.net> |
Merge branch 'iosm-driver'
M Chetan Kumar says:
==================== net: iosm: PCIe Driver for Intel M.2 Modem
The IOSM (IPC over Shared Memory) driver is a PCIe host driver implemented for linux
Merge branch 'iosm-driver'
M Chetan Kumar says:
==================== net: iosm: PCIe Driver for Intel M.2 Modem
The IOSM (IPC over Shared Memory) driver is a PCIe host driver implemented for linux or chrome platform for data exchange over PCIe interface between Host platform & Intel M.2 Modem. The driver exposes interface conforming to the MBIM protocol. Any front end application ( eg: Modem Manager) could easily manage the MBIM interface to enable data communication towards WWAN.
Intel M.2 modem uses 2 BAR regions. The first region is dedicated to Doorbell register for IRQs and the second region is used as scratchpad area for book keeping modem execution stage details along with host system shared memory region context details. The upper edge of the driver exposes the control and data channels for user space application interaction. At lower edge these data and control channels are associated to pipes. The pipes are lowest level interfaces used over PCIe as a logical channel for message exchange. A single channel maps to UL and DL pipe and are initialized on device open.
On UL path, driver copies application sent data to SKBs associate it with transfer descriptor and puts it on to ring buffer for DMA transfer. Once information has been updated in shared memory region, host gives a Doorbell to modem to perform DMA and modem uses MSI to communicate back to host. For receiving data in DL path, SKBs are pre-allocated during pipe open and transfer descriptors are given to modem for DMA transfer.
The driver exposes two types of ports, namely "wwan0mbim0", a char device node which is used for MBIM control operation and "wwan0-x",(x = 0,1,2..7) network interfaces for IP data communication. 1) MBIM Control Interface: This node exposes an interface between modem and application using char device exposed by "IOSM" driver to establish and manage the MBIM data communication with PCIe based Intel M.2 Modems.
2) MBIM Data Interface: The IOSM driver exposes IP link interface "wwan0-x" of type "wwan" for IP traffic. Iproute network utility is used for creating "wwan0-x" network interface and for associating it with MBIM IP session. The Driver supports upto 8 IP sessions for simultaneous IP communication.
This applies on top of WWAN core rtnetlink series posted here: https://lore.kernel.org/netdev/1623486057-13075-1-git-send-email-loic.poulain@linaro.org/
Also driver has been compiled and tested on top of netdev net-next tree. https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/ ====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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be8c936e |
| 13-Jun-2021 |
M Chetan Kumar <m.chetan.kumar@intel.com> |
net: iosm: power management
Implements state machine to handle host & device sleep.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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