xsk: Add launch time hardware offload support to XDP Tx metadata

Extend the XDP Tx metadata framework so that user can requests launch time
hardware offload, where the Ethernet device will schedule

xsk: Add launch time hardware offload support to XDP Tx metadata

Extend the XDP Tx metadata framework so that user can requests launch time
hardware offload, where the Ethernet device will schedule the packet for
transmission at a pre-determined time called launch time. The value of
launch time is communicated from user space to Ethernet driver via
launch_time field of struct xsk_tx_metadata.

Suggested-by: Stanislav Fomichev <[email protected]>
Signed-off-by: Song Yoong Siang <[email protected]>
Signed-off-by: Martin KaFai Lau <[email protected]>
Acked-by: Stanislav Fomichev <[email protected]>
Acked-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]

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netdev-genl: Add an XSK attribute to queues

Expose a new per-queue nest attribute, xsk, which will be present for
queues that are being used for AF_XDP. If the queue is not being used for
AF_XDP, th

netdev-genl: Add an XSK attribute to queues

Expose a new per-queue nest attribute, xsk, which will be present for
queues that are being used for AF_XDP. If the queue is not being used for
AF_XDP, the nest will not be present.

In the future, this attribute can be extended to include more data about
XSK as it is needed.

Signed-off-by: Joe Damato <[email protected]>
Suggested-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev: add io_uring memory provider info

Add a nested attribute for io_uring memory provider info. For now it is
empty and its presence indicates that a particular page pool or queue
has an io_urin

netdev: add io_uring memory provider info

Add a nested attribute for io_uring memory provider info. For now it is
empty and its presence indicates that a particular page pool or queue
has an io_uring memory provider attached.

$ ./cli.py --spec netlink/specs/netdev.yaml --dump page-pool-get
[{'id': 80,
'ifindex': 2,
'inflight': 64,
'inflight-mem': 262144,
'napi-id': 525},
{'id': 79,
'ifindex': 2,
'inflight': 320,
'inflight-mem': 1310720,
'io_uring': {},
'napi-id': 525},
...

$ ./cli.py --spec netlink/specs/netdev.yaml --dump queue-get
[{'id': 0, 'ifindex': 1, 'type': 'rx'},
{'id': 0, 'ifindex': 1, 'type': 'tx'},
{'id': 0, 'ifindex': 2, 'napi-id': 513, 'type': 'rx'},
{'id': 1, 'ifindex': 2, 'napi-id': 514, 'type': 'rx'},
...
{'id': 12, 'ifindex': 2, 'io_uring': {}, 'napi-id': 525, 'type': 'rx'},
...

Reviewed-by: Jakub Kicinski <[email protected]>
Signed-off-by: Pavel Begunkov <[email protected]>
Signed-off-by: David Wei <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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net: Add napi_struct parameter irq_suspend_timeout

Add a per-NAPI IRQ suspension parameter, which can be get/set with
netdev-genl.

This patch doesn't change any behavior but prepares the code for o

net: Add napi_struct parameter irq_suspend_timeout

Add a per-NAPI IRQ suspension parameter, which can be get/set with
netdev-genl.

This patch doesn't change any behavior but prepares the code for other
changes in the following commits which use irq_suspend_timeout as a
timeout for IRQ suspension.

Signed-off-by: Martin Karsten <[email protected]>
Co-developed-by: Joe Damato <[email protected]>
Signed-off-by: Joe Damato <[email protected]>
Tested-by: Joe Damato <[email protected]>
Tested-by: Martin Karsten <[email protected]>
Acked-by: Stanislav Fomichev <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev-genl: Support setting per-NAPI config values

Add support to set per-NAPI defer_hard_irqs and gro_flush_timeout.

Signed-off-by: Joe Damato <[email protected]>
Reviewed-by: Jakub Kicinski <ku

netdev-genl: Support setting per-NAPI config values

Add support to set per-NAPI defer_hard_irqs and gro_flush_timeout.

Signed-off-by: Joe Damato <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev-genl: Dump gro_flush_timeout

Support dumping gro_flush_timeout for a NAPI ID.

Signed-off-by: Joe Damato <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Reviewed-by: Eric D

netdev-genl: Dump gro_flush_timeout

Support dumping gro_flush_timeout for a NAPI ID.

Signed-off-by: Joe Damato <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev-genl: Dump napi_defer_hard_irqs

Support dumping defer_hard_irqs for a NAPI ID.

Signed-off-by: Joe Damato <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Reviewed-by: Jak

netdev-genl: Dump napi_defer_hard_irqs

Support dumping defer_hard_irqs for a NAPI ID.

Signed-off-by: Joe Damato <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev: add dmabuf introspection

Add dmabuf information to page_pool stats:

$ ./cli.py --spec ../netlink/specs/netdev.yaml --dump page-pool-get
...
{'dmabuf': 10,
'id': 456,
'ifindex': 3,
'i

netdev: add dmabuf introspection

Add dmabuf information to page_pool stats:

$ ./cli.py --spec ../netlink/specs/netdev.yaml --dump page-pool-get
...
{'dmabuf': 10,
'id': 456,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 455,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 454,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 453,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 452,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 451,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 450,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},
{'dmabuf': 10,
'id': 449,
'ifindex': 3,
'inflight': 1023,
'inflight-mem': 4190208},

And queue stats:

$ ./cli.py --spec ../netlink/specs/netdev.yaml --dump queue-get
...
{'dmabuf': 10, 'id': 8, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 9, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 10, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 11, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 12, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 13, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 14, 'ifindex': 3, 'type': 'rx'},
{'dmabuf': 10, 'id': 15, 'ifindex': 3, 'type': 'rx'},

Suggested-by: Jakub Kicinski <[email protected]>
Signed-off-by: Mina Almasry <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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net: netdev netlink api to bind dma-buf to a net device

API takes the dma-buf fd as input, and binds it to the netdevice. The
user can specify the rx queues to bind the dma-buf to.

Suggested-by: St

net: netdev netlink api to bind dma-buf to a net device

API takes the dma-buf fd as input, and binds it to the netdevice. The
user can specify the rx queues to bind the dma-buf to.

Suggested-by: Stanislav Fomichev <[email protected]>
Signed-off-by: Mina Almasry <[email protected]>
Reviewed-by: Donald Hunter <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev: add qstat for csum complete

Recent commit 0cfe71f45f42 ("netdev: add queue stats") added
a lot of useful stats, but only those immediately needed by virtio.
Presumably virtio does not suppor

netdev: add qstat for csum complete

Recent commit 0cfe71f45f42 ("netdev: add queue stats") added
a lot of useful stats, but only those immediately needed by virtio.
Presumably virtio does not support CHECKSUM_COMPLETE,
so statistic for that form of checksumming wasn't included.
Other drivers will definitely need it, in fact we expect it
to be needed in net-next soon (mlx5). So let's add the definition
of the counter for CHECKSUM_COMPLETE to uAPI in net already,
so that the counters are in a more natural order (all subsequent
counters have not been present in any released kernel, yet).

Signed-off-by: Jakub Kicinski <[email protected]>
Reviewed-by: Joe Damato <[email protected]>
Fixes: 0cfe71f45f42 ("netdev: add queue stats")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>

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netdev: Add queue stats for TX stop and wake

TX queue stop and wake are counted by some drivers.
Support reporting these via netdev-genl queue stats.

Signed-off-by: Daniel Jurgens <[email protected]

netdev: Add queue stats for TX stop and wake

TX queue stop and wake are counted by some drivers.
Support reporting these via netdev-genl queue stats.

Signed-off-by: Daniel Jurgens <[email protected]>
Reviewed-by: Jiri Pirko <[email protected]>
Reviewed-by: Jason Xing <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev: add queue stats

These stats are commonly. Support reporting those via netdev-genl queue
stats.

name: rx-hw-drops
name: rx-hw-drop-overruns
name: rx-csum-unnecessary
name: rx-csum-none
name:

netdev: add queue stats

These stats are commonly. Support reporting those via netdev-genl queue
stats.

name: rx-hw-drops
name: rx-hw-drop-overruns
name: rx-csum-unnecessary
name: rx-csum-none
name: rx-csum-bad
name: rx-hw-gro-packets
name: rx-hw-gro-bytes
name: rx-hw-gro-wire-packets
name: rx-hw-gro-wire-bytes
name: rx-hw-drop-ratelimits
name: tx-hw-drops
name: tx-hw-drop-errors
name: tx-csum-none
name: tx-needs-csum
name: tx-hw-gso-packets
name: tx-hw-gso-bytes
name: tx-hw-gso-wire-packets
name: tx-hw-gso-wire-bytes
name: tx-hw-drop-ratelimits

Signed-off-by: Xuan Zhuo <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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netdev: add queue stat for alloc failures

Rx alloc failures are commonly counted by drivers.
Support reporting those via netdev-genl queue stats.

Acked-by: Stanislav Fomichev <[email protected]>
Revie

netdev: add queue stat for alloc failures

Rx alloc failures are commonly counted by drivers.
Support reporting those via netdev-genl queue stats.

Acked-by: Stanislav Fomichev <[email protected]>
Reviewed-by: Amritha Nambiar <[email protected]>
Reviewed-by: Xuan Zhuo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev: add per-queue statistics

The ethtool-nl family does a good job exposing various protocol
related and IEEE/IETF statistics which used to get dumped under
ethtool -S, with creative names. Queu

netdev: add per-queue statistics

The ethtool-nl family does a good job exposing various protocol
related and IEEE/IETF statistics which used to get dumped under
ethtool -S, with creative names. Queue stats don't have a netlink
API, yet, and remain a lion's share of ethtool -S output for new
drivers. Not only is that bad because the names differ driver to
driver but it's also bug-prone. Intuitively drivers try to report
only the stats for active queues, but querying ethtool stats
involves multiple system calls, and the number of stats is
read separately from the stats themselves. Worse still when user
space asks for values of the stats, it doesn't inform the kernel
how big the buffer is. If number of stats increases in the meantime
kernel will overflow user buffer.

Add a netlink API for dumping queue stats. Queue information is
exposed via the netdev-genl family, so add the stats there.
Support per-queue and sum-for-device dumps. Latter will be useful
when subsequent patches add more interesting common stats than
just bytes and packets.

The API does not currently distinguish between HW and SW stats.
The expectation is that the source of the stats will either not
matter much (good packets) or be obvious (skb alloc errors).

Acked-by: Stanislav Fomichev <[email protected]>
Reviewed-by: Amritha Nambiar <[email protected]>
Reviewed-by: Xuan Zhuo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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xdp: Add VLAN tag hint

Implement functionality that enables drivers to expose VLAN tag
to XDP code.

VLAN tag is represented by 2 variables:
- protocol ID, which is passed to bpf code in BE
- VLAN T

xdp: Add VLAN tag hint

Implement functionality that enables drivers to expose VLAN tag
to XDP code.

VLAN tag is represented by 2 variables:
- protocol ID, which is passed to bpf code in BE
- VLAN TCI, in host byte order

Acked-by: Stanislav Fomichev <[email protected]>
Signed-off-by: Larysa Zaremba <[email protected]>
Acked-by: Jesper Dangaard Brouer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>

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netdev-genl: spec: Add PID in netdev netlink YAML spec

Add support in netlink spec(netdev.yaml) for PID of the
NAPI thread. Add code generated from the spec.

Signed-off-by: Amritha Nambiar <amritha

netdev-genl: spec: Add PID in netdev netlink YAML spec

Add support in netlink spec(netdev.yaml) for PID of the
NAPI thread. Add code generated from the spec.

Signed-off-by: Amritha Nambiar <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Link: https://lore.kernel.org/r/170147335301.5260.11872351477120434501.stgit@anambiarhost.jf.intel.com
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev-genl: spec: Add irq in netdev netlink YAML spec

Add support in netlink spec(netdev.yaml) for interrupt number
among the NAPI attributes. Add code generated from the spec.

Signed-off-by: Amri

netdev-genl: spec: Add irq in netdev netlink YAML spec

Add support in netlink spec(netdev.yaml) for interrupt number
among the NAPI attributes. Add code generated from the spec.

Signed-off-by: Amritha Nambiar <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Link: https://lore.kernel.org/r/170147334210.5260.18178387869057516983.stgit@anambiarhost.jf.intel.com
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev-genl: spec: Extend netdev netlink spec in YAML for NAPI

Add support in netlink spec(netdev.yaml) for napi related information.
Add code generated from the spec.

Signed-off-by: Amritha Nambia

netdev-genl: spec: Extend netdev netlink spec in YAML for NAPI

Add support in netlink spec(netdev.yaml) for napi related information.
Add code generated from the spec.

Signed-off-by: Amritha Nambiar <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Link: https://lore.kernel.org/r/170147333119.5260.7050639053080529108.stgit@anambiarhost.jf.intel.com
Signed-off-by: Jakub Kicinski <[email protected]>

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netdev-genl: spec: Extend netdev netlink spec in YAML for queue

Add support in netlink spec(netdev.yaml) for queue information.
Add code generated from the spec.

Note: The "queue-type" attribute ta

netdev-genl: spec: Extend netdev netlink spec in YAML for queue

Add support in netlink spec(netdev.yaml) for queue information.
Add code generated from the spec.

Note: The "queue-type" attribute takes values 0 and 1 for rx
and tx queue type respectively.

Signed-off-by: Amritha Nambiar <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Link: https://lore.kernel.org/r/170147330963.5260.2576294626647300472.stgit@anambiarhost.jf.intel.com
Signed-off-by: Jakub Kicinski <[email protected]>

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xsk: Add TX timestamp and TX checksum offload support

This change actually defines the (initial) metadata layout
that should be used by AF_XDP userspace (xsk_tx_metadata).
The first field is flags w

xsk: Add TX timestamp and TX checksum offload support

This change actually defines the (initial) metadata layout
that should be used by AF_XDP userspace (xsk_tx_metadata).
The first field is flags which requests appropriate offloads,
followed by the offload-specific fields. The supported per-device
offloads are exported via netlink (new xsk-flags).

The offloads themselves are still implemented in a bit of a
framework-y fashion that's left from my initial kfunc attempt.
I'm introducing new xsk_tx_metadata_ops which drivers are
supposed to implement. The drivers are also supposed
to call xsk_tx_metadata_request/xsk_tx_metadata_complete in
the right places. Since xsk_tx_metadata_{request,_complete}
are static inline, we don't incur any extra overhead doing
indirect calls.

The benefit of this scheme is as follows:
- keeps all metadata layout parsing away from driver code
- makes it easy to grep and see which drivers implement what
- don't need any extra flags to maintain to keep track of what
offloads are implemented; if the callback is implemented - the offload
is supported (used by netlink reporting code)

Two offloads are defined right now:
1. XDP_TXMD_FLAGS_CHECKSUM: skb-style csum_start+csum_offset
2. XDP_TXMD_FLAGS_TIMESTAMP: writes TX timestamp back into metadata
area upon completion (tx_timestamp field)

XDP_TXMD_FLAGS_TIMESTAMP is also implemented for XDP_COPY mode: it writes
SW timestamp from the skb destructor (note I'm reusing hwtstamps to pass
metadata pointer).

The struct is forward-compatible and can be extended in the future
by appending more fields.

Reviewed-by: Song Yoong Siang <[email protected]>
Signed-off-by: Stanislav Fomichev <[email protected]>
Acked-by: Jakub Kicinski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>

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net: page_pool: expose page pool stats via netlink

Dump the stats into netlink. More clever approaches
like dumping the stats per-CPU for each CPU individually
to see where the packets get consumed

net: page_pool: expose page pool stats via netlink

Dump the stats into netlink. More clever approaches
like dumping the stats per-CPU for each CPU individually
to see where the packets get consumed can be implemented
in the future.

A trimmed example from a real (but recently booted system):

$ ./cli.py --no-schema --spec netlink/specs/netdev.yaml \
--dump page-pool-stats-get
[{'info': {'id': 19, 'ifindex': 2},
'alloc-empty': 48,
'alloc-fast': 3024,
'alloc-refill': 0,
'alloc-slow': 48,
'alloc-slow-high-order': 0,
'alloc-waive': 0,
'recycle-cache-full': 0,
'recycle-cached': 0,
'recycle-released-refcnt': 0,
'recycle-ring': 0,
'recycle-ring-full': 0},
{'info': {'id': 18, 'ifindex': 2},
'alloc-empty': 66,
'alloc-fast': 11811,
'alloc-refill': 35,
'alloc-slow': 66,
'alloc-slow-high-order': 0,
'alloc-waive': 0,
'recycle-cache-full': 1145,
'recycle-cached': 6541,
'recycle-released-refcnt': 0,
'recycle-ring': 1275,
'recycle-ring-full': 0},
{'info': {'id': 17, 'ifindex': 2},
'alloc-empty': 73,
'alloc-fast': 62099,
'alloc-refill': 413,
...

Acked-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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net: page_pool: report when page pool was destroyed

Report when page pool was destroyed. Together with the inflight
/ memory use reporting this can serve as a replacement for the
warning about leake

net: page_pool: report when page pool was destroyed

Report when page pool was destroyed. Together with the inflight
/ memory use reporting this can serve as a replacement for the
warning about leaked page pools we currently print to dmesg.

Example output for a fake leaked page pool using some hacks
in netdevsim (one "live" pool, and one "leaked" on the same dev):

$ ./cli.py --no-schema --spec netlink/specs/netdev.yaml \
--dump page-pool-get
[{'id': 2, 'ifindex': 3},
{'id': 1, 'ifindex': 3, 'destroyed': 133, 'inflight': 1}]

Tested-by: Dragos Tatulea <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Acked-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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net: page_pool: report amount of memory held by page pools

Advanced deployments need the ability to check memory use
of various system components. It makes it possible to make informed
decisions abo

net: page_pool: report amount of memory held by page pools

Advanced deployments need the ability to check memory use
of various system components. It makes it possible to make informed
decisions about memory allocation and to find regressions and leaks.

Report memory use of page pools. Report both number of references
and bytes held.

Acked-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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net: page_pool: add netlink notifications for state changes

Generate netlink notifications about page pool state changes.

Reviewed-by: Eric Dumazet <[email protected]>
Acked-by: Jesper Dangaard B

net: page_pool: add netlink notifications for state changes

Generate netlink notifications about page pool state changes.

Reviewed-by: Eric Dumazet <[email protected]>
Acked-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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net: page_pool: implement GET in the netlink API

Expose the very basic page pool information via netlink.

Example using ynl-py for a system with 9 queues:

$ ./cli.py --no-schema --spec netlink/spe

net: page_pool: implement GET in the netlink API

Expose the very basic page pool information via netlink.

Example using ynl-py for a system with 9 queues:

$ ./cli.py --no-schema --spec netlink/specs/netdev.yaml \
--dump page-pool-get
[{'id': 19, 'ifindex': 2, 'napi-id': 147},
{'id': 18, 'ifindex': 2, 'napi-id': 146},
{'id': 17, 'ifindex': 2, 'napi-id': 145},
{'id': 16, 'ifindex': 2, 'napi-id': 144},
{'id': 15, 'ifindex': 2, 'napi-id': 143},
{'id': 14, 'ifindex': 2, 'napi-id': 142},
{'id': 13, 'ifindex': 2, 'napi-id': 141},
{'id': 12, 'ifindex': 2, 'napi-id': 140},
{'id': 11, 'ifindex': 2, 'napi-id': 139},
{'id': 10, 'ifindex': 2, 'napi-id': 138}]

Reviewed-by: Eric Dumazet <[email protected]>
Acked-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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