linux-stable.git/include/net/mana, branch master

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

2026-08-21T18:48:54+00:00

Pull RDMA updates from Jason Gunthorpe:
 "About the normal size, still a lot of AI bug fixes and so on, but some
  interesting new functionality too:

   - Assorted locking, bounds-checking, cleanup, and error-path fixes
     across UCMA/CMA, bng_re, bnxt_re, cxgb4, EFA, ERDMA, HFI1, HNS,
     ionic, iRDMA, mlx4/mlx5, RXE, SIW, SRP/SRPT, and iSER target.

   - netlink report for max # of supported resources

   - get_zeroed_page()/etc removal

   - Robust udata for ionic

   - Allow unique RDMA device names per network namespace

   - Completion counters and v2 admit queue support for EFA

   - UC QP support for MANA

   - Completion timestamps for ionic

   - Harden uverbs data validation and resource lifetime handling,
     fixing several core use-after-free conditions.

   - bnxt_re toggle-page ownership and lifetime bug fixes

   - dmabuf SRQ support for mlx5"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (160 commits)
  RDMA/ucma: Allow path records to exactly fit the output buffer
  RDMA/uverbs: Guard legacy bundles without method_elm
  RDMA/efa: Add support for 128B admin v2 SQ entry
  RDMA/efa: Generalize the admin SQ
  RDMA/efa: Decouple admin command payload from admin header
  RDMA/rxe: Fix OOB in free_rd_atomic_resources()
  RDMA/cma: Fix WARNING in res_to_rt
  RDMA/cxgb4: Free debugfs on registration failure
  RDMA/cxgb4: Cancel reg_work before freeing device on remove
  RDMA/ucma: Lock the handler in ucma_set_ib_path()
  RDMA/ucma: Lock the handler in ucma_write_cm_event()
  RDMA/erdma: restrict the driver to little-endian systems
  RDMA/ionic: Embed counter driver data in rdma_counter allocation
  RDMA/ionic: Cap eq_count to the eth driver's interrupt vector budget
  RDMA/siw: Fix use-after-free in siw_accept()
  IB/isert: post the full-feature receive buffers after session registration
  IB/isert: delay the final Login Response until the session is registered
  RDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ
  RDMA/erdma: Hold QP references for AE and CM processing
  RDMA/erdma: Hold CQ references when processing EQ events
  ...

net: mana: Fall back to scattered pages for GDMA queues

2026-08-13T11:42:48+00:00

Each GDMA queue ring is one dma_alloc_coherent() of the whole ring size.
Such high-order allocations fail first under memory fragmentation, so
queue setup can fail with memory still free.

The hardware does not need the ring physically contiguous:
mana_gd_create_dma_region() already maps it as a list of MANA_PAGE_SIZE
(4K) device addresses. Only the driver's linear CPU view needs
contiguity, and it goes through mana_gd_ring_ptr() and
mana_gd_ring_contig_avail(); change both to map offsets onto
scattered pages.

Add a fallback in mana_gd_alloc_memory(): data-path queues pass
allow_scatter=true, so when the contiguous allocation fails the ring is
backed by a vector of scattered PAGE_SIZE (order-0) coherent pages,
presenting the same DMA page-list layout to the device. The HW channel
bootstrap keeps allow_scatter=false, and the debugfs ring dumper reads
scattered rings through the same helpers.

Signed-off-by: Aditya Garg 
Link: https://patch.msgid.link/20260807210002.1695263-3-gargaditya@linux.microsoft.com
Signed-off-by: Paolo Abeni

net: mana: Extend RX CQE coalescing up to 8 packets

2026-08-08T01:29:21+00:00

To support up to 8 packets per CQE, update related CQE processing
code and structures.
Update ethtool handlers to set this feature.
Update per queue stat to show the coalesced CQE counters.
This feature is supported on NIC hardware showing the relevant
PF flag.

Signed-off-by: Haiyang Zhang 
Reviewed-by: Simon Horman 
Reviewed-by: Breno Leitao 
Link: https://patch.msgid.link/20260805185404.1052177-1-haiyangz@linux.microsoft.com
Signed-off-by: Jakub Kicinski

net: mana: force full-page RX buffers via ethtool private flag

2026-08-04T02:09:07+00:00

On some ARM64 platforms with 4K PAGE_SIZE, page_pool fragment
allocation in the RX refill path can cause 15-20% throughput
regression under high connection counts (>16 TCP streams).

Add an ethtool private flag "full-page-rx" that allows the user to
force one RX buffer per page, bypassing the page_pool fragment path.
This restores line-rate (180+ Gbps) performance on affected platforms.

Usage:
  ethtool --set-priv-flags eth0 full-page-rx on

There is no behavioral change by default. The flag must be explicitly
enabled by the user or udev rule.

The existing single-buffer-per-page logic for XDP and jumbo frames is
consolidated into a new helper mana_use_single_rxbuf_per_page() which
is now the single decision point for both the automatic and
user-controlled paths.

Reviewed-by: Jacob Keller 
Reviewed-by: Haiyang Zhang 
Signed-off-by: Dipayaan Roy 
Link: https://patch.msgid.link/20260729063347.3388035-3-dipayanroy@linux.microsoft.com
Signed-off-by: Jakub Kicinski

mlx5: Deprecate latency-sensitive QPs feature

2026-07-27T06:37:29+00:00

New HW no longer implements a separate class for latency-sensitive QPs
and advertises this by a new cap bit.

Signed-off-by: Leon Romanovsky

RDMA/mana_ib: return PD number to the user

2026-07-23T12:21:17+00:00

Implement returning to userspace applications PDNs of created PDs.
The PDN is used by applications that build work requests outside of the
rdma-core code base. The PDN is used to build work requests that require
mentioning the PD. The HW still ensures PD isolation using PDN attached
to MRs and WRs, therefore the PDN mentioned in the work request must match
the PDN of the used work queue. The work requests can fit only 16 bit PDNs.
Allow users to request short PDNs which are 16 bits.

The capability to request short PDN and get PDN is encoded in the response
of alloc user context IOCTL.

Signed-off-by: Konstantin Taranov 
Link: https://patch.msgid.link/20260717200839.495327-1-kotaranov@linux.microsoft.com
Signed-off-by: Leon Romanovsky

net: mana: Add debug knob to skip TX timeout recovery reset

2026-07-17T11:25:20+00:00

Add a per-port debugfs boolean "tx_timeout_skip_reset" that, when
enabled, makes mana_tx_timeout() log the TX timeout and return without
queueing the per-port detach/attach recovery work.

This is a debug-only aid for bringup and qualification: skipping the
recovery reset keeps the device and queue state intact so a TX timeout
can be correlated with hardware telemetry. The knob defaults to false,
so production recovery behaviour is unchanged.

Signed-off-by: Aditya Garg 
Reviewed-by: Haiyang Zhang 
Reviewed-by: Dipayaan Roy 
Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/20260710132229.2851441-1-gargaditya@linux.microsoft.com
Signed-off-by: Paolo Abeni

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-07-10T08:20:05+00:00

Cross-merge networking fixes after downstream PR (net-7.2-rc3).

Conflicts:

tools/testing/selftests/net/lib.sh
  dd6a23bac306b ("selftests: net: make busywait timeout clock portable")
  895bad9cc4cec ("selftests: net: make busywait timeout clock portable")

Signed-off-by: Paolo Abeni

net: mana: Add Interrupt Moderation support

2026-07-09T08:54:00+00:00

Add Static and Dynamic Interrupt Moderation (DIM) support for
Rx and Tx.
Update queue creation procedure with new data struct with the related
settings.
Add functions to collect stat for DIM, and workers to update DIM data
and settings.
Update ethtool handler to get/set the moderation settings from a user.
To avoid detach/re-attach ops, ring DIM doorbell to change settings
at run time.
By default, adaptive-rx/tx (DIM) are enabled if supported by HW.

Signed-off-by: Haiyang Zhang 
Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/20260702220123.815018-1-haiyangz@linux.microsoft.com
Signed-off-by: Paolo Abeni

net: mana: Sync page pool RX frags for CPU

2026-07-09T08:36:14+00:00

MANA allocates RX buffers from page pool fragments when frag_count is
greater than 1. In that case the buffers remain DMA mapped by page pool
and the RX completion path does not call dma_unmap_single(). As a result,
the implicit sync-for-CPU normally performed by dma_unmap_single() is
missing before the packet data is passed to the networking stack.

This breaks RX on configurations which require explicit DMA syncing, for
example when booted with swiotlb=force.

Fix this by recording the page pool page and DMA sync offset when the RX
buffer is allocated, and syncing the received packet range for CPU access
before handing the RX buffer to the stack.

Fixes: 730ff06d3f5c ("net: mana: Use page pool fragments for RX buffers instead of full pages to improve memory efficiency.")
Cc: stable@vger.kernel.org
Reviewed-by: Haiyang Zhang 
Signed-off-by: Dexuan Cui 
Link: https://patch.msgid.link/20260702041237.617719-3-decui@microsoft.com
Signed-off-by: Paolo Abeni