kernel/git/next/linux-next.git/include/net/mana/gdma.h, 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

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 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: Add support for PF device 0x00C1

2026-06-10T00:51:55+00:00

Update the device id table to include the new device id 0x00C1. This device's BAR layout is similar to VF's, update the function, mana_gd_init_registers(), accordingly. Signed-off-by: Haiyang Zhang Link: https://patch.msgid.link/20260605212302.2135499-1-haiyangz@linux.microsoft.com Signed-off-by: Jakub Kicinski

RDMA/mana_ib: Allocate interrupt contexts on EQs

2026-06-10T00:22:27+00:00

Use the GIC functions to allocate interrupt contexts for RDMA EQs. These interrupt contexts may be shared with Ethernet EQs when MSI-X vectors are limited. The driver now supports allocating dedicated MSI-X for each EQ. Indicate this capability through driver capability bits. The RDMA EQs pass use_msi_bitmap=false to share MSI-X vectors with Ethernet, while the capability flag advertises that the driver supports per-vPort EQ separation when hardware has sufficient vectors. Populate eq.irq on all RDMA EQs for consistency with the Ethernet path. Also relocate the GDMA_DRV_CAP_FLAG_1_HW_VPORT_LINK_AWARE define to its numeric BIT(6) position among the other capability flags. Signed-off-by: Long Li Acked-by: Leon Romanovsky Link: https://patch.msgid.link/20260605005717.2059954-7-longli@microsoft.com Signed-off-by: Jakub Kicinski

net: mana: Allocate interrupt context for each EQ when creating vPort

2026-06-10T00:22:27+00:00

Use GIC functions to create a dedicated interrupt context or acquire a shared interrupt context for each EQ when setting up a vPort. The caller now owns the GIC reference across the EQ create/destroy lifecycle: mana_create_eq() calls mana_gd_get_gic() before creating each EQ and mana_destroy_eq() calls mana_gd_put_gic() after destroying it. The msix_index invalidation is moved from mana_gd_deregister_irq() to the mana_gd_create_eq() error path so that mana_destroy_eq() can read the index before teardown. Signed-off-by: Long Li Link: https://patch.msgid.link/20260605005717.2059954-6-longli@microsoft.com Signed-off-by: Jakub Kicinski

net: mana: Introduce GIC context with refcounting for interrupt management

2026-06-10T00:22:26+00:00

To allow Ethernet EQs to use dedicated or shared MSI-X vectors and RDMA EQs to share the same MSI-X, introduce a GIC (GDMA IRQ Context) with reference counting. This allows the driver to create an interrupt context on an assigned or unassigned MSI-X vector and share it across multiple EQ consumers. Signed-off-by: Long Li Link: https://patch.msgid.link/20260605005717.2059954-4-longli@microsoft.com Signed-off-by: Jakub Kicinski

net: mana: Query device capabilities and configure MSI-X sharing for EQs

2026-06-10T00:22:26+00:00

When querying the device, adjust the max number of queues to allow dedicated MSI-X vectors for each vPort. The per-vPort queue count is clamped towards MANA_DEF_NUM_QUEUES but will not exceed the hardware maximum reported by the device. MSI-X sharing among vPorts is enabled when there are not enough MSI-X vectors for dedicated allocation, or when the platform does not support dynamic MSI-X allocation (in which case all vectors are pre-allocated at probe time and sharing is always used). The msi_sharing flag is reset at the top of mana_gd_query_max_resources() so it is recomputed from current hardware state on each probe or resume cycle. Clamp apc->max_queues to gc->max_num_queues_vport in mana_init_port() so that on resume, if max_num_queues_vport has decreased due to fewer MSI-X vectors, num_queues is reduced accordingly before EQ allocation. A device reporting zero ports now results in a fatal probe error since the per-vPort MSI-X math requires at least one port. Rename mana_query_device_cfg() to mana_gd_query_device_cfg() as it is used at GDMA device probe time for querying device capabilities. Signed-off-by: Long Li Link: https://patch.msgid.link/20260605005717.2059954-3-longli@microsoft.com Signed-off-by: Jakub Kicinski