OpenCloudOS-Kernel/drivers/infiniband/sw/rxe
Jason Gunthorpe e8b3a426fb Use ODP MRs for kernel ULPs
The following series extends MR creation routines to allow creation of
 user MRs through kernel ULPs as a proxy. The immediate use case is to
 allow RDS to work over FS-DAX, which requires ODP (on-demand-paging)
 MRs to be created and such MRs were not possible to create prior this
 series.
 
 The first part of this patchset extends RDMA to have special verb
 ib_reg_user_mr(). The common use case that uses this function is a
 userspace application that allocates memory for HCA access but the
 responsibility to register the memory at the HCA is on an kernel ULP.
 This ULP acts as an agent for the userspace application.
 
 The second part provides advise MR functionality for ULPs. This is
 integral part of ODP flows and used to trigger pagefaults in advance
 to prepare memory before running working set.
 
 The third part is actual user of those in-kernel APIs.
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Merge tag 'rds-odp-for-5.5' into rdma.git for-next

From https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma

Leon Romanovsky says:

====================
Use ODP MRs for kernel ULPs

The following series extends MR creation routines to allow creation of
user MRs through kernel ULPs as a proxy. The immediate use case is to
allow RDS to work over FS-DAX, which requires ODP (on-demand-paging)
MRs to be created and such MRs were not possible to create prior this
series.

The first part of this patchset extends RDMA to have special verb
ib_reg_user_mr(). The common use case that uses this function is a
userspace application that allocates memory for HCA access but the
responsibility to register the memory at the HCA is on an kernel ULP.
This ULP acts as an agent for the userspace application.

The second part provides advise MR functionality for ULPs. This is
integral part of ODP flows and used to trigger pagefaults in advance
to prepare memory before running working set.

The third part is actual user of those in-kernel APIs.
====================

* tag 'rds-odp-for-5.5':
  net/rds: Use prefetch for On-Demand-Paging MR
  net/rds: Handle ODP mr registration/unregistration
  net/rds: Detect need of On-Demand-Paging memory registration
  RDMA/mlx5: Fix handling of IOVA != user_va in ODP paths
  IB/mlx5: Mask out unsupported ODP capabilities for kernel QPs
  RDMA/mlx5: Don't fake udata for kernel path
  IB/mlx5: Add ODP WQE handlers for kernel QPs
  IB/core: Add interface to advise_mr for kernel users
  IB/core: Introduce ib_reg_user_mr
  IB: Allow calls to ib_umem_get from kernel ULPs

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2020-01-21 09:55:04 -04:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rxe.c RDMA/rxe: Remove useless rxe_init_device_param assignments 2019-10-24 15:20:18 -03:00
rxe.h RDMA: Introduce ib_port_phys_state enum 2019-08-12 10:18:52 -04:00
rxe_av.c RDMA/rxe: Improve loopback marking 2019-02-04 15:57:49 -07:00
rxe_comp.c ibverbs/rxe: Remove variable self-initialization 2019-07-07 09:19:38 -03:00
rxe_cq.c IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
rxe_hdr.h RDMA: Use __packed annotation instead of __attribute__ ((packed)) 2019-03-25 21:14:12 -03:00
rxe_hw_counters.c IB/rxe: Make counters thread safe 2018-12-20 14:09:45 -07:00
rxe_hw_counters.h RDMA/rxe: Add link_down, rdma_sends, rdma_recvs stats counters 2018-11-08 14:22:54 -07:00
rxe_icrc.c IB/rxe: Offload CRC calculation when possible 2017-04-21 10:45:02 -04:00
rxe_loc.h IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
rxe_mcast.c IB/rxe: Remove a pointless indirection layer 2017-01-10 16:52:47 -05:00
rxe_mmap.c IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
rxe_mr.c IB: Allow calls to ib_umem_get from kernel ULPs 2020-01-16 16:14:28 +02:00
rxe_net.c net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup 2019-12-04 12:27:13 -08:00
rxe_net.h rdma_rxe: Use netlink messages to add/delete links 2019-02-19 20:52:19 -07:00
rxe_opcode.c IB/rxe: add RXE_START_MASK for rxe_opcode IB_OPCODE_RC_SEND_ONLY_INV 2018-04-27 14:20:47 -04:00
rxe_opcode.h
rxe_param.h Introduce maximum WQE size to check limits 2020-01-15 16:27:01 -04:00
rxe_pool.c RDMA: Convert CQ allocations to be under core responsibility 2019-06-11 16:39:49 -04:00
rxe_pool.h RDMA: Handle PD allocations by IB/core 2019-02-08 16:51:04 -07:00
rxe_qp.c RDMA/rxe: Compute the maximum sges and inline size based on the WQE size 2020-01-15 16:36:41 -04:00
rxe_queue.c IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
rxe_queue.h IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
rxe_recv.c rxe: correctly calculate iCRC for unaligned payloads 2019-12-09 13:55:26 -05:00
rxe_req.c rxe: correctly calculate iCRC for unaligned payloads 2019-12-09 13:55:26 -05:00
rxe_resp.c rxe: correctly calculate iCRC for unaligned payloads 2019-12-09 13:55:26 -05:00
rxe_srq.c IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
rxe_sysfs.c rdma_rxe: Use netlink messages to add/delete links 2019-02-19 20:52:19 -07:00
rxe_task.c RDMA/rxe: Suppress gcc 7 fall-through complaints 2017-10-14 20:47:07 -04:00
rxe_task.h IB/rxe: Wait for tasklets to finish before tearing down QP 2016-12-12 16:31:45 -05:00
rxe_verbs.c RDMA/rxe: Increase DMA max_segment_size parameter 2019-10-28 14:52:03 -03:00
rxe_verbs.h RDMA/rxe: Fix error type of mmap_offset 2020-01-03 19:43:51 -04:00