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Jason Gunthorpe 85e40ba1c4 RDMA/umem: Fix ib_umem_find_best_pgsz() for mappings that cross a page boundary 
[ Upstream commit a40c20dabd ]

It is possible for a single SGL to span an aligned boundary, eg if the SGL
is

  61440 -> 90112

Then the length is 28672, which currently limits the block size to
32k. With a 32k page size the two covering blocks will be:

  32768->65536 and 65536->98304

However, the correct answer is a 128K block size which will span the whole
28672 bytes in a single block.

Instead of limiting based on length figure out which high IOVA bits don't
change between the start and end addresses. That is the highest useful
page size.

Fixes: 4a35339958 ("RDMA/umem: Add API to find best driver supported page size in an MR")
Link: https://lore.kernel.org/r/1-v2-270386b7e60b+28f4-umem_1_jgg@nvidia.com
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-10-29 09:57:48 +01:00
..
Makefile RDMA/counter: Add set/clear per-port auto mode support 2019-07-05 10:22:54 -03:00
addr.c RDMA/netlink: Do not always generate an ACK for some netlink operations 2020-02-14 16:34:08 -05:00
agent.c
…
agent.h
…
cache.c IB/core: Fix potential NULL pointer dereference in pkey cache 2020-05-20 08:20:26 +02:00
cgroup.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
cm.c RDMA/cm: Remove a race freeing timewait_info 2020-10-01 13:17:43 +02:00
cm_msgs.h
…
cma.c RDMA/cma: Protect bind_list and listen_list while finding matching cm id 2020-06-30 15:36:57 -04:00
cma_configfs.c IB/cma: Fix ports memory leak in cma_configfs 2020-06-24 17:50:32 +02:00
cma_priv.h
…
core_priv.h RDMA/core: Fix protection fault in ib_mr_pool_destroy 2020-03-12 13:00:29 +01:00
counters.c RDMA/counter: Allow manually bind QPs with different pids to same counter 2020-08-21 13:05:32 +02:00
cq.c rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors 2019-08-05 11:50:32 -04:00
device.c RDMA/core: Fix bogus WARN_ON during ib_unregister_device_queued() 2020-08-19 08:16:09 +02:00
fmr_pool.c RDMA: Delete DEBUG code 2019-08-20 13:27:53 -04:00
iwcm.c RDMA/iwcm: Fix iwcm work deallocation 2020-03-12 13:00:29 +01:00
iwcm.h
…
iwpm_msg.c RDMA/iwpm: Delete unnecessary checks before the macro call "dev_kfree_skb" 2019-08-27 13:09:23 -03:00
iwpm_util.c RDMA/iwpm: Delete unnecessary checks before the macro call "dev_kfree_skb" 2019-08-27 13:09:23 -03:00
iwpm_util.h
…
mad.c RDMA/mad: Fix possible memory leak in ib_mad_post_receive_mads() 2020-06-30 15:36:58 -04:00
mad_priv.h
…
mad_rmpp.c
…
mad_rmpp.h
…
mr_pool.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
multicast.c IB/core, ipoib: Do not overreact to SM LID change event 2019-05-07 16:06:03 -03:00
netlink.c IB/core: Avoid deadlock during netlink message handling 2019-10-24 20:49:37 -03:00
nldev.c RDMA/netlink: Remove CAP_NET_RAW check when dump a raw QP 2020-08-19 08:16:17 +02:00
opa_smi.h
…
packer.c
…
rdma_core.c RDMA/core: Fix double destruction of uobject 2020-06-03 08:21:25 +02:00
rdma_core.h RDMA/core: Clear out the udata before error unwind 2019-05-27 14:35:26 -03:00
restrack.c RDMA/restrack: Rewrite PID namespace check to be reliable 2019-08-20 13:44:44 -04:00
restrack.h RDMA/restrack: Make is_visible_in_pid_ns() as an API 2019-07-05 10:22:54 -03:00
roce_gid_mgmt.c drivers: use in_dev_for_each_ifa_rtnl/rcu 2019-06-02 18:06:26 -07:00
rw.c RDMA/rw: Fix error flow during RDMA context initialization 2020-03-12 13:00:29 +01:00
sa.h
…
sa_query.c IB/sa: Resolv use-after-free in ib_nl_make_request() 2020-07-16 08:16:38 +02:00
security.c RDMA/core: Ensure security pkey modify is not lost 2020-04-01 11:02:04 +02:00
smi.c
…
smi.h
…
sysfs.c RDMA/core: Fix several reference count leaks. 2020-06-24 17:50:17 +02:00
ucma.c RDMA/ucma: Add missing locking around rdma_leave_multicast() 2020-10-29 09:57:46 +01:00
ud_header.c
…
umem.c RDMA/umem: Fix ib_umem_find_best_pgsz() for mappings that cross a page boundary 2020-10-29 09:57:48 +01:00
umem_odp.c IB/core: Fix ODP get user pages flow 2020-02-11 04:35:46 -08:00
user_mad.c RDMA/mad: Do not crash if the rdma device does not have a umad interface 2020-04-01 11:01:58 +02:00
uverbs.h RDMA/uverbs: Prevent potential underflow 2019-10-22 15:05:36 -03:00
uverbs_cmd.c IB/uverbs: Set IOVA on IB MR in uverbs layer 2020-08-21 13:05:31 +02:00
uverbs_ioctl.c mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options 2019-07-12 11:05:46 -07:00
uverbs_main.c RDMA/uverbs: Make the event_queue fds return POLLERR when disassociated 2020-06-17 16:40:22 +02:00
uverbs_marshall.c
…
uverbs_std_types.c
…
uverbs_std_types_counters.c
…
uverbs_std_types_cq.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
uverbs_std_types_device.c
…
uverbs_std_types_dm.c
…
uverbs_std_types_flow_action.c
…
uverbs_std_types_mr.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
uverbs_uapi.c RDMA: Move driver_id into struct ib_device_ops 2019-06-10 16:56:02 -03:00
verbs.c RDMA/core: Fix reported speed and width 2020-09-17 13:47:43 +02:00