- 21 Nov, 2022 4 commits
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Huanhuan Wang authored
Xfrm callbacks are implemented to offload SA info into firmware by mailbox. It supports 16K SA info in total. Expose ipsec offload feature to upper layer, this feature will signal the availability of the offload. Based on initial work of Norm Bagley <norman.bagley@netronome.com>. Signed-off-by:
Huanhuan Wang <huanhuan.wang@corigine.com> Reviewed-by:
Louis Peens <louis.peens@corigine.com> Signed-off-by:
Simon Horman <simon.horman@corigine.com> Acked-by:
Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Huanhuan Wang authored
A new metadata type and config structure are introduced to interact with firmware to support ipsec offloading. This feature relies on specific firmware that supports ipsec encrypt/decrypt by advertising related capability bit. The xfrm callbacks which interact with upper layer are implemented in the following patch. Based on initial work of Norm Bagley <norman.bagley@netronome.com>. Signed-off-by:
Leon Romanovsky <leonro@nvidia.com> Signed-off-by:
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Yinjun Zhang authored
Currently the 32-bit capability word is almost exhausted, now allocate some more words to support new features, and control word is also extended accordingly. Packet-type offloading is implemented in NIC application firmware, but it's not used in kernel driver, so reserve this bit here in case it's redefined for other use. Signed-off-by:
Yinjun Zhang <yinjun.zhang@corigine.com> Reviewed-by:
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Gustavo A. R. Silva authored
When built with Control Flow Integrity, function prototypes between caller and function declaration must match. These mismatches are visible at compile time with the new -Wcast-function-type-strict in Clang[1]. Fix a total of 227 warnings like these: drivers/net/ethernet/brocade/bna/bna_enet.c:519:3: warning: cast from 'void (*)(struct bna_ethport *, enum bna_ethport_event)' to 'bfa_fsm_t' (aka 'void (*)(void *, int)') converts to incompatible function type [-Wcast-function-type-strict] bfa_fsm_set_state(ethport, bna_ethport_sm_down); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The bna state machine code heavily overloads its state machine functions, so these have been separated into their own sets of structs, enums, typedefs, and helper functions. There are almost zero binary code changes, all seem to be related to header file line numbers changing, or the addition of the new stats helper. Important to mention is that while I was manually implementing this changes I was staring at this[2] patch from Kees Cook. Thanks, Kees. :) Link: https://github.com/KSPP/linux/issues/240 [1] https://reviews.llvm.org/D134831 [2] https://lore.kernel.org/linux-hardening/20220929230334.2109344-1-keescook@chromium.org/Reviewed-by:Kees Cook <keescook@chromium.org> Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by:
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- 19 Nov, 2022 8 commits
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Felix Fietkau authored
Keeps traffic sent to the switch within link speed limits Signed-off-by:
Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20221116080734.44013-7-nbd@nbd.nameSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Felix Fietkau authored
Keeps traffic sent to the switch within link speed limits Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20221116080734.44013-6-nbd@nbd.nameSigned-off-by:
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Felix Fietkau authored
When sending traffic to multiple ports with different link speeds, queued packets to one port can drown out tx to other ports. In order to better handle transmission to multiple ports, use the hardware shaper feature to implement weighted fair queueing between ports. Weight and maximum rate are automatically adjusted based on the link speed of the port. The first 3 queues are unrestricted and reserved for non-DSA direct tx on GMAC ports. The following queues are automatically assigned by the MTK DSA tag driver based on the target port number. The PPE offload code configures the queues for offloaded traffic in the same way. This feature is only supported on devices supporting QDMA. All queues still share the same DMA ring and descriptor pool. Signed-off-by:
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Felix Fietkau authored
On newer chips, this field is unused and contains some bits related to queue assignment. Initialize it to 0 in those cases. Fix offload_version on MT7621 and MT7623, which still need the previous value. Signed-off-by:
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Felix Fietkau authored
Improves handling of DMA ring overflow. Clarify other WDMA drop related comment. Signed-off-by:
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Felix Fietkau authored
In order to use the hardware traffic shaper feature, a larger tx ring is needed, especially for the scratch ring, which the hardware shaper uses to reorder packets. Signed-off-by:
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Lukas Bulwahn authored
Commit a7c2a32e ("net: fman: memac: Use lynx pcs driver") makes the Freescale Data-Path Acceleration Architecture Frame Manager use lynx pcs driver by selecting PCS_LYNX. It also selects the non-existing config PCS as well, which has no effect. Remove this select to a non-existing config. Signed-off-by:
Lukas Bulwahn <lukas.bulwahn@gmail.com> Link: https://lore.kernel.org/r/20221116102450.13928-1-lukas.bulwahn@gmail.comSigned-off-by:
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Jakub Kicinski authored
I've added a flex array to struct nlmsghdr in commit 738136a0 ("netlink: split up copies in the ack construction") to allow accessing the data easily. It leads to warnings with clang, if user space wraps this structure into another struct and the flex array is not at the end of the container. Reviewed-by:
David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/all/20221114023927.GA685@u2004-local/ Link: https://lore.kernel.org/r/20221118033903.1651026-1-kuba@kernel.orgSigned-off-by:
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- 18 Nov, 2022 28 commits
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Schspa Shi authored
The caller of del_timer_sync must prevent restarting of the timer, If we have no this synchronization, there is a small probability that the cancellation will not be successful. And syzbot report the fellowing crash: ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:929 [inline] BUG: KASAN: use-after-free in enqueue_timer+0x18/0xa4 kernel/time/timer.c:605 Write at addr f9ff000024df6058 by task syz-fuzzer/2256 Pointer tag: [f9], memory tag: [fe] CPU: 1 PID: 2256 Comm: syz-fuzzer Not tainted 6.1.0-rc5-syzkaller-00008- ge01d50cb #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace.part.0+0xe0/0xf0 arch/arm64/kernel/stacktrace.c:156 dump_backtrace arch/arm64/kernel/stacktrace.c:162 [inline] show_stack+0x18/0x40 arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x68/0x84 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x1a8/0x4a0 mm/kasan/report.c:395 kasan_report+0x94/0xb4 mm/kasan/report.c:495 __do_kernel_fault+0x164/0x1e0 arch/arm64/mm/fault.c:320 do_bad_area arch/arm64/mm/fault.c:473 [inline] do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:749 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:825 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576 hlist_add_head include/linux/list.h:929 [inline] enqueue_timer+0x18/0xa4 kernel/time/timer.c:605 mod_timer+0x14/0x20 kernel/time/timer.c:1161 mrp_periodic_timer_arm net/802/mrp.c:614 [inline] mrp_periodic_timer+0xa0/0xc0 net/802/mrp.c:627 call_timer_fn.constprop.0+0x24/0x80 kernel/time/timer.c:1474 expire_timers+0x98/0xc4 kernel/time/timer.c:1519 To fix it, we can introduce a new active flags to make sure the timer will not restart. Reported-by: syzbot+6fd64001c20aa99e34a4@syzkaller.appspotmail.com Signed-off-by:
Schspa Shi <schspa@gmail.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fsDavid S. Miller authored
David Howells says: ==================== rxrpc: Fix oops and missing config conditionals The patches that were pulled into net-next previously[1] had some issues that this patchset fixes: (1) Fix missing IPV6 config conditionals. (2) Fix an oops caused by calling udpv6_sendmsg() directly on an AF_INET socket. (3) Fix the validation of network addresses on entry to socket functions so that we don't allow an AF_INET6 address if we've selected an AF_INET transport socket. Link: https://lore.kernel.org/r/166794587113.2389296.16484814996876530222.stgit@warthog.procyon.org.uk/ [1] ==================== Signed-off-by: -
Eric Dumazet authored
Dan reported a new warning after my recent patch: New smatch warnings: net/core/dev.c:6409 napi_disable() error: uninitialized symbol 'new'. Indeed, we must first wait for STATE_SCHED and STATE_NPSVC to be cleared, to make sure @new variable has been initialized properly. Fixes: 4ffa1d1c ("net: adopt try_cmpxchg() in napi_{enable|disable}()") Reported-by:
kernel test robot <lkp@intel.com> Reported-by:
Dan Carpenter <error27@gmail.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Dan Carpenter authored
The "pkt" was supposed to have been deleted in a previous patch. It leads to an uninitialized variable bug. Fixes: 72f0c6fb ("rxrpc: Allocate ACK records at proposal and queue for transmission") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Dan Carpenter authored
The error handling for if skb_copy_bits() fails was accidentally deleted so the rxkad_decrypt_ticket() function is not called. Fixes: 5d7edbc9 ("rxrpc: Get rid of the Rx ring") Signed-off-by:
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Lorenzo Bianconi authored
Get rid of cpu_relax in mtk_pending_work routine since MTK_RESETTING is set only in mtk_pending_work() and it runs holding rtnl lock Signed-off-by:
Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by:
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Lorenzo Bianconi authored
Restore user configured MTU running mtk_hw_init() during tx timeout routine since it will be overwritten after a hw reset. Reported-by:
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Alex Elder authored
Dan Carpenter reported that Smatch found an instance where a pointer which had previously been assumed could be null (as indicated by a null check) was later dereferenced without a similar check. In practice this doesn't lead to a problem because currently the pointers used are all non-null. Nevertheless this patch addresses the reported problem. In addition, I spotted another bug that arose in the same commit. When the command to initialize a routing table memory region was added, the number of entries computed for the non-hashed table was wrong (it ended up being a Boolean rather than the count intended). This bug is fixed here as well. Reported-by:
Caleb Connolly <caleb.connolly@linaro.com> Fixes: 5cb76899 ("net: ipa: reduce arguments to ipa_table_init_add()") Signed-off-by:
Alex Elder <elder@linaro.org> Signed-off-by:
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David S. Miller authored
Merge tag 'wireless-next-2022-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next Kalle Valo says: ==================== wireless-next patches for v6.2 Second set of patches for v6.2. Only driver patches this time, nothing really special. Unused platform data support was removed from wl1251 and rtw89 got WoWLAN support. Major changes: ath11k * support configuring channel dwell time during scan rtw89 * new dynamic header firmware format support * Wake-over-WLAN support rtl8xxxu * enable IEEE80211_HW_SUPPORT_FAST_XMIT ==================== Signed-off-by:
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David S. Miller authored
Xin Long says: ==================== sctp: support vrf processing This patchset adds the VRF processing in SCTP. Simliar to TCP/UDP, it includes socket bind and socket/association lookup changes. For socket bind change, it allows sockets to bind to a VRF device and allows multiple sockets with the same IP and PORT to bind to different interfaces in patch 1-3. For socket/association lookup change, it adds dif and sdif check in both asoc and ep lookup in patch 4 and 5, and when binding to nodev, users can decide if accept the packets received from one l3mdev by setup a sysctl option in patch 6. Note with VRF support, in a netns, an association will be decided by src ip + src port + dst ip + dst port + bound_dev_if, and it's possible for ss to have: State Local Address:Port Peer Address:Port ESTAB 192.168.1.2%vrf-s1:1234 `- ESTAB 192.168.1.2%veth1:1234 192.168.1.1:1234 ESTAB 192.168.1.2%vrf-s2:1234 `- ESTAB 192.168.1.2%veth2:1234 192.168.1.1:1234 See the selftest in patch 7 for more usage. Also, thanks Carlo for testing this patch series on their use. v1->v2: - In Patch 5, move sctp_sk_bound_dev_eq() definition to net/sctp/ input.c to avoid a build error when IP_SCTP is disabled, as Paolo suggested. - In Patch 7, avoid one sleep by disabling the IPv6 dad, and remove another sleep by using ss to check if the server's ready, and also delete two unncessary sleeps in sctp_hello.c, as Paolo suggested. ==================== Signed-off-by: -
Xin Long authored
This patch adds 12 small test cases: 01-04 test for the sysctl net.sctp.l3mdev_accept. 05-10 test for only binding to a right l3mdev device, the connection can be created. 11-12 test for two socks binding to different l3mdev devices at the same time, each of them can process the packets from the corresponding peer. The tests run for both IPv4 and IPv6 SCTP. Signed-off-by:
Xin Long <lucien.xin@gmail.com> Signed-off-by:
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Xin Long authored
This patch is to add sysctl net.sctp.l3mdev_accept to allow users to change the pernet global l3mdev_accept. Signed-off-by:
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Xin Long authored
This patch at first adds a pernet global l3mdev_accept to decide if it accepts the packets from a l3mdev when a SCTP socket doesn't bind to any interface. It's set to 1 to avoid any possible incompatible issue, and in next patch, a sysctl will be introduced to allow to change it. Then similar to inet/udp_sk_bound_dev_eq(), sctp_sk_bound_dev_eq() is added to check either dif or sdif is equal to sk_bound_dev_if, and to check sid is 0 or l3mdev_accept is 1 if sk_bound_dev_if is not set. This function is used to match a association or a endpoint, namely called by sctp_addrs_lookup_transport() and sctp_endpoint_is_match(). All functions that needs updating are: sctp_rcv(): asoc: __sctp_rcv_lookup() __sctp_lookup_association() -> sctp_addrs_lookup_transport() __sctp_rcv_lookup_harder() __sctp_rcv_init_lookup() __sctp_lookup_association() -> sctp_addrs_lookup_transport() __sctp_rcv_walk_lookup() __sctp_rcv_asconf_lookup() __sctp_lookup_association() -> sctp_addrs_lookup_transport() ep: __sctp_rcv_lookup_endpoint() -> sctp_endpoint_is_match() sctp_connect(): sctp_endpoint_is_peeled_off() __sctp_lookup_association() sctp_has_association() sctp_lookup_association() __sctp_lookup_association() -> sctp_addrs_lookup_transport() sctp_diag_dump_one(): sctp_transport_lookup_process() -> sctp_addrs_lookup_transport() Signed-off-by: -
Xin Long authored
Add skb_sdif function in struct sctp_af to get the enslaved device for both ipv4 and ipv6 when adding SCTP VRF support in sctp_rcv in the next patch. Signed-off-by:
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Xin Long authored
In sctp_get_port_local(), when binding to IP and PORT, it should also check sk_bound_dev_if to match listening sk if it's set by SO_BINDTOIFINDEX, so that multiple sockets with the same IP and PORT, but different sk_bound_dev_if can be listened at the same time. Signed-off-by:
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Xin Long authored
When binding to an ipv6 address, it calls ipv6_chk_addr() to check if this address is on any dev. If a socket binds to a l3mdev but no dev is passed to do this check, all l3mdev and slaves will be skipped and the check will fail. This patch is to pass the bound_dev to make sure the devices under the same l3mdev can be returned in ipv6_chk_addr(). When the bound_dev is not a l3mdev or l3slave, l3mdev_master_dev_rcu() will return NULL in __ipv6_chk_addr_and_flags(), it will keep compitable with before when NULL dev was passed. Signed-off-by:
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Xin Long authored
After binding to a l3mdev, it should use the route table from the corresponding VRF to verify the addr when binding to an address. Note ipv6 doesn't need it, as binding to ipv6 address does not verify the addr with route lookup. Signed-off-by:
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Jiawen Wu authored
Fix duplicate check on polling timeout. Fixes: 1efa9bfe ("net: libwx: Implement interaction with firmware") Signed-off-by:
Jiawen Wu <jiawenwu@trustnetic.com> Reviewed-by:
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Antoine Tenart authored
Following 1b16b3fd ("net: phy: mscc: macsec: clear encryption keys when freeing a flow"), go one step further and instead of calling memzero_explicit on the key when freeing a flow, simply not copy the key in the first place as it's only used when a new flow is set up. Signed-off-by:
Antoine Tenart <atenart@kernel.org> Signed-off-by:
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Jakub Kicinski authored
Alex Elder says: ==================== net: ipa: change GSI firmware load specification Currently, GSI firmware must be loaded for IPA before it can be used--either by the modem, or by the AP. New hardware supports a third option, with the bootloader taking responsibility for loading GSI firmware. In that case, neither the AP nor the modem needs to do that. The first patch in this series deprecates the "modem-init" Device Tree property in the IPA binding, using a new "qcom,gsi-loader" property instead. The second and third implement logic in the code to support either the "old" or the "new" way of specifying how GSI firmware is loaded. The last two patches implement a new value for the "qcom,gsi-loader" property. If the value is "skip", neither the AP nor modem needs to load the GSI firmware. The first of these patches implements the change in the IPA binding; the second implements it in the code. ==================== Link: https://lore.kernel.org/r/20221116073257.34010-1-elder@linaro.orgSigned-off-by:
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Alex Elder authored
Define a new value "skip" for the "qcom,gsi-loader" Device Tree property. If used, it indicates that neither the AP nor the modem need to load GSI firmware (because it has already been loaded--for example by the boot loader). Signed-off-by:
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Alex Elder authored
Add a new enumerated value to those defined for the qcom,gsi-loader property. If the qcom,gsi-loader is "skip", the GSI firmware will already be loaded, so neither the AP nor modem is required to load GSI firmware. Signed-off-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by:
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Alex Elder authored
Introduce a new way of specifying how the GSI firmware gets loaded for IPA. Currently, this is indicated by the presence or absence of the Boolean "modem-init" Device Tree property. The new property must have a value--either "self" or "modem"--which indicates whether the AP or modem is the GSI firmware loader, respectively. For legacy systems, the new property will not exist, and the "modem-init" property will be used. For newer systems, the "qcom,gsi-loader" property *must* exist, and must have one of the two prescribed values. It is an error to have both properties defined, and it is an error for the new property to have an unrecognized value. Signed-off-by:
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Alex Elder authored
The GSI layer used for IPA requires firmware to be loaded. Currently either the AP or the modem loads the firmware, distinguished by whether the "modem-init" Device Tree property is defined. Some newer systems implement a third option. In preparation for that, encapsulate the code that determines how the GSI firmware gets loaded in a new function, ipa_firmware_loader(). Signed-off-by:
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Alex Elder authored
GSI firmware for IPA must be loaded during initialization, either by the AP or by the modem. The loader is currently specified based on whether the Boolean modem-init property is present. Instead, use a new property with an enumerated value to indicate explicitly how GSI firmware gets loaded. With this in place, a third approach can be added in an upcoming patch. The new qcom,gsi-loader property has two defined values: - self: The AP loads GSI firmware - modem: The modem loads GSI firmware The modem-init property must still be supported, but is now marked deprecated. Update the example so it represents the SC7180 SoC, and provide examples for the qcom,gsi-loader, memory-region, and firmware-name properties. Signed-off-by:
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Xin Long authored
Move these two macros from net/sctp/sctp.h to linux/sctp.h, so that it will be enough to include only linux/sctp.h in nft_exthdr.c and xt_sctp.c. It should not include "net/sctp/sctp.h" if a module does not have a dependence on SCTP module. Signed-off-by:
Saeed Mahameed <saeed@kernel.org> Link: https://lore.kernel.org/r/ef6468a687f36da06f575c2131cd4612f6b7be88.1668526821.git.lucien.xin@gmail.comSigned-off-by:
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Xin Long authored
Currently "net/sctp/checksum.h" including "net/sctp/sctp.h" is included in quite some places in netfilter and openswitch and net/sched. It's not necessary to include "net/sctp/sctp.h" if a module does not have dependence on SCTP, "linux/sctp.h" is the right one to include. Signed-off-by:
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Jakub Kicinski authored
Michal Wilczynski says: ==================== Implement devlink-rate API and extend it This patch series implements devlink-rate for ice driver. Unfortunately current API isn't flexible enough for our use case, so there is a need to extend it. Some functions have been introduced to enable the driver to export current Tx scheduling configuration. Pasting justification for this series from commit implementing devlink-rate in ice driver(that is a part of this series): There is a need to support modification of Tx scheduler tree, in the ice driver. This will allow user to control Tx settings of each node in the internal hierarchy of nodes. As a result user will be able to use Hierarchy QoS implemented entirely in the hardware. This patch implemenents devlink-rate API. It also exports initial default hierarchy. It's mostly dictated by the fact that the tree can't be removed entirely, all we can do is enable the user to modify it. For example root node shouldn't ever be removed, also nodes that have children are off-limits. Example initial tree with 2 VF's: [root@fedora ~]# devlink port function rate show pci/0000:4b:00.0/node_27: type node parent node_26 pci/0000:4b:00.0/node_26: type node parent node_0 pci/0000:4b:00.0/node_34: type node parent node_33 pci/0000:4b:00.0/node_33: type node parent node_32 pci/0000:4b:00.0/node_32: type node parent node_16 pci/0000:4b:00.0/node_19: type node parent node_18 pci/0000:4b:00.0/node_18: type node parent node_17 pci/0000:4b:00.0/node_17: type node parent node_16 pci/0000:4b:00.0/node_21: type node parent node_20 pci/0000:4b:00.0/node_20: type node parent node_3 pci/0000:4b:00.0/node_14: type node parent node_5 pci/0000:4b:00.0/node_5: type node parent node_3 pci/0000:4b:00.0/node_13: type node parent node_4 pci/0000:4b:00.0/node_12: type node parent node_4 pci/0000:4b:00.0/node_11: type node parent node_4 pci/0000:4b:00.0/node_10: type node parent node_4 pci/0000:4b:00.0/node_9: type node parent node_4 pci/0000:4b:00.0/node_8: type node parent node_4 pci/0000:4b:00.0/node_7: type node parent node_4 pci/0000:4b:00.0/node_6: type node parent node_4 pci/0000:4b:00.0/node_4: type node parent node_3 pci/0000:4b:00.0/node_3: type node parent node_16 pci/0000:4b:00.0/node_16: type node parent node_15 pci/0000:4b:00.0/node_15: type node parent node_0 pci/0000:4b:00.0/node_2: type node parent node_1 pci/0000:4b:00.0/node_1: type node parent node_0 pci/0000:4b:00.0/node_0: type node pci/0000:4b:00.0/1: type leaf parent node_27 pci/0000:4b:00.0/2: type leaf parent node_27 Let me visualize part of the tree: +---------+ | node_0 | +---------+ | +----v----+ | node_26 | +----+----+ | +----v----+ | node_27 | +----+----+ | |-----------------| +----v----+ +----v----+ | VF 1 | | VF 2 | +----+----+ +----+----+ So at this point there is a couple things that can be done. For example we could only assign parameters to VF's. [root@fedora ~]# devlink port function rate set pci/0000:4b:00.0/1 \ tx_max 5Gbps This would cap the VF 1 BW to 5Gbps. But let's say you would like to create a completely new branch. This can be done like this: [root@fedora ~]# devlink port function rate add \ pci/0000:4b:00.0/node_custom parent node_0 [root@fedora ~]# devlink port function rate add \ pci/0000:4b:00.0/node_custom_1 parent node_custom [root@fedora ~]# devlink port function rate set \ pci/0000:4b:00.0/1 parent node_custom_1 This creates a completely new branch and reassigns VF 1 to it. A number of parameters is supported per each node: tx_max, tx_share, tx_priority and tx_weight. ==================== Link: https://lore.kernel.org/r/20221115104825.172668-1-michal.wilczynski@intel.comSigned-off-by:
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