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Andrew Gallatin 4b732459f0 iflib: Use a single tx dma map 
The need for a separate map for TSO and non-TSO seems to have arisen from
a misunderstanding about the DMA requirements for Intel drivers like
ice/ixl/iavf. Specifically, this Intel hardware has a quirk where no
more than N (=8) segs can be DMA'ed per packet on the wire. This limit
was enforced using a DMA map with a low segment limit for non-TSO and a
driver specific check for TSO. This led to a *lot* of complexity in
iflib (~80 extra lines of code that this change removes) when the
limit can simply be enforced via the existing EFBIG mechanisms.

This change adds a new flag, IFLIB_SPARSE_TX, that drivers for hardware
with this quirk must set.  When set, it causes non-TSO sends that
exceed isc_tx_nsegment to be treated as if bus_dmamap_load_mbuf_sg()
had returned EFBIG.

Due to the API/KABI change, I've bumped the FreeBSD version as well.

Note kgalazka suggested the flag, rather than a more awkward
mechanism that I had in my initial patch.

Reviewed by: kbowling
Sponsored by: Netflix
Differential Revision:  https://reviews.freebsd.org/D60175
2026-11-05 11:55:28 -05:00
..
altq
altq(4): Fix a typo in a source code comment
2025-12-13 10:54:25 +01:00
route
routing: fix rtentry use-after-free in multipath route append
2026-10-07 06:16:33 +02:00
bpf_buffer.c
sys: Remove ancient SCCS tags.
2023-11-26 22:23:30 -07:00
bpf_buffer.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
bpf_filter.c
sys: Automated cleanup of cdefs and other formatting
2023-11-26 22:24:00 -07:00
bpf_ifnet.c
bpf: assert that calculated header length fits in sockaddr
2026-09-18 15:42:41 -07:00
bpf_jitter.c
sys: Remove $FreeBSD$: one-line .c pattern
2023-08-16 11:54:36 -06:00
bpf_jitter.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
bpf_zerocopy.c
sf_buf_kva: Return a pointer instead of a vm_offset_t
2026-04-23 13:05:54 -04:00
bpf_zerocopy.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
bpf.c
bpf: fix handling the read timeout on ppc64
2026-04-15 21:24:05 +02:00
bpf.h
bpf: add a crutch to support if_vmove
2025-12-18 08:46:20 -08:00
bpfdesc.h
bpf: convert several boolean natured fields of bpf_d to flags
2025-12-12 16:43:45 -08:00
bridgestp.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
bridgestp.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
cmis.h
ifconfig: add CMIS support for 400GbE optics
2026-04-14 14:47:56 -04:00
debugnet_inet.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
debugnet_int.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
debugnet.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
debugnet.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
dlt.h
libpcap: Update to 1.10.6
2026-03-15 00:41:29 -03:00
dummymbuf.c
dummymbuf: add 'enlarge'
2025-01-17 17:00:08 +01:00
ethernet.h
ng_ether: refactor to use interface EVENTHANDLER(9)s
2025-12-21 18:23:14 -08:00
firewire.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
ieee8023ad_lacp.c
lacp: fix lacp for interfaces with unknown media
2026-11-02 10:58:28 -05:00
ieee8023ad_lacp.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
ieee_oui.h
net/ieee_oui.h: clarify how OUI_FREEBSD_BASE is managed
2026-11-02 21:05:14 -08:00
if_arp.h
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
if_bridge.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_bridgevar.h
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
if_clone.c
if_clone: Make ifnet_detach_sxlock opaque to consumers
2026-04-13 12:38:44 +08:00
if_clone.h
tun(4)/tap(4): allow devices to be configured as transient
2025-08-21 09:22:44 -05:00
if_dead.c
rtnetlink: Add native SR-IOV VF status
2026-09-06 06:51:52 -07:00
if_disc.c
net: Remove unneeded NULL check for the allocated ifnet
2024-06-28 18:16:29 +08:00
if_dl.h
link_addr: be more strict about address formats
2025-05-15 01:02:52 +01:00
if_edsc.c
net: Remove unneeded NULL check for the allocated ifnet
2024-06-28 18:16:29 +08:00
if_enc.c
enc: create an interface at SI_SUB_PROTO_IF stage
2026-01-13 13:30:22 -08:00
if_enc.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
if_epair.c
epair: Make vnet_epair_uninit() run earlier
2026-10-07 13:28:28 +00:00
if_ethersubr.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_fwsubr.c
if_fwsubr: remove ARP target hardware address trimming
2026-06-21 17:31:34 -07:00
if_geneve.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_geneve.h
if_geneve: Add Support for Geneve (RFC8926)
2026-04-13 17:44:58 +03:30
if_gif.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_gif.h
gif: use hashalloc(9)
2026-04-12 10:26:08 -07:00
if_gre.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_gre.h
if_gre(4): Fix races by changing initialization order and locks
2026-07-30 21:21:11 +03:30
if_infiniband.c
if_infininband: Support BPF write for broadcast frames
2025-02-23 16:13:09 -08:00
if_ipsec.c
sys/netipsec: ensure sah stability during input callback processing
2025-12-22 14:31:25 +02:00
if_ipsec.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
if_lagg.c
lagg: re-check port caps after bringing up a port
2026-07-08 08:27:58 -04:00
if_lagg.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
if_llatbl.c
lltable: use own lock
2025-12-08 09:20:56 -08:00
if_llatbl.h
lltable: use own lock
2025-12-08 09:20:56 -08:00
if_llc.h
sys: Remove ancient SCCS tags.
2023-11-26 22:23:30 -07:00
if_loop.c
loopback: set MTU to IF_MAXMTU
2026-10-16 14:08:36 -07:00
if_me.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_media.c
sys: don't panic on ifm_status being NULL
2025-05-06 21:22:18 -07:00
if_media.h
if_media: Add 400G FR4 media types
2026-11-02 11:35:19 -05:00
if_mib.c
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
if_mib.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
if_ovpn.c
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
if_ovpn.h
if_ovpn: support floating clients
2025-07-28 16:36:54 +02:00
if_pflog.h
pflog: create bpf tapping points without ifnet(9)
2026-06-28 15:59:35 +02:00
if_pfsync.h
pf: Add pfsync protocol for FreeBSD 15
2025-09-23 12:06:33 +02:00
if_private.h
rtnetlink: Add native SR-IOV VF status
2026-09-06 06:51:52 -07:00
if_stf.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_stf.h
…
if_strings.h
if_geneve: Add Support for Geneve (RFC8926)
2026-04-13 17:44:58 +03:30
if_tap.h
tun(4)/tap(4): allow devices to be configured as transient
2025-08-21 09:22:44 -05:00
if_tun.h
tun(4)/tap(4): allow devices to be configured as transient
2025-08-21 09:22:44 -05:00
if_tuntap.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_types.h
if_types: Fix a typo in a source code comment
2026-03-27 07:57:49 +01:00
if_var.h
hn: Invoke the owned VF's transmit queue flush callback
2026-09-14 19:02:26 -07:00
if_vf_status.h
rtnetlink: Allow VF priority reporting in trunk mode
2026-09-10 00:15:27 -07:00
if_vlan_var.h
sys/net: move DOT1Q_VID_* constants to ethernet.h
2025-07-05 00:21:51 +01:00
if_vlan.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_vxlan.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
if_vxlan.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
if.c
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
if.h
net: Revert the ioctl SR-IOV VF status interface
2026-08-10 15:49:55 -07:00
ifdi_if.m
iflib: Add optional RSS configuration queries
2026-09-18 15:24:29 -07:00
iflib.c
iflib: Use a single tx dma map
2026-11-05 11:55:28 -05:00
iflib.h
iflib: Use a single tx dma map
2026-11-05 11:55:28 -05:00
ifq.c
sys: Remove ancient SCCS tags.
2023-11-26 22:23:30 -07:00
ifq.h
sys: Remove ancient SCCS tags.
2023-11-26 22:23:30 -07:00
infiniband.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
mp_ring.c
sys: Automated cleanup of cdefs and other formatting
2023-11-26 22:24:00 -07:00
mp_ring.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
mppc.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
mppcc.c
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
mppcd.c
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
netisr_internal.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
netisr.c
netisr: fix compilation without VIMAGE
2025-01-16 20:32:53 -08:00
netisr.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
netmap_legacy.h
sys: Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:18 -06:00
netmap_user.h
sys: Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:18 -06:00
netmap_virt.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
netmap.h
sys: Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:18 -06:00
paravirt.h
sys: Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:18 -06:00
pfil.c
pfil: Avoid potential mbuf tag leak
2026-10-13 09:08:18 -04:00
pfil.h
sys: Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:24 -06:00
pfkeyv2.h
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
pflow.h
pflow: show socket status in verbose mode
2024-01-25 17:37:51 +01:00
pfvar.h
pf: remove armv7-specific counter code
2026-10-30 13:21:11 +01:00
ppp_defs.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
radix.c
sys: Remove ancient SCCS tags.
2023-11-26 22:23:30 -07:00
radix.h
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
rndis.h
net: Fix typo (triple S)
2023-12-27 20:24:32 -07:00
route.c
net*: remove remnants of caddr_t
2026-10-16 14:16:59 -07:00
route.h
netlink: Add RTA_PREFSRC support
2026-07-29 00:24:24 +03:30
rss_config.c
rss_config: Add option to enable rss udp hashing
2026-03-16 12:22:35 +03:30
rss_config.h
rss: Enable portions of RSS globally to enable symmetric hashing
2025-11-22 09:29:31 -05:00
rtsock.c
net*: use inlined m_pullup()
2026-10-19 10:32:00 -07:00
sff8436.h
misc: Avoid use of Unicode closing single quote
2026-09-23 14:43:13 +02:00
sff8472.h
misc: Avoid use of Unicode closing single quote
2026-09-23 14:43:13 +02:00
slcompress.c
tcp: extend the use of the th_flags accessor function
2024-11-29 09:48:23 +01:00
slcompress.h
sys: Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:18 -06:00
toeplitz.c
sys: Automated cleanup of cdefs and other formatting
2023-11-26 22:24:00 -07:00
toeplitz.h
sys: Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:11 -06:00
vnet.c
vnet: Ensure the space allocated by vnet_data_alloc() is sufficent aligned
2026-02-28 19:35:42 +08:00
vnet.h
net: attach IPv4 and IPv6 stacks to an interface with EVENTHANDLER(9)
2025-12-18 11:15:53 -08:00