diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2026-07-16 15:23:13 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2026-07-26 03:11:00 -0400 |
| commit | 22fe73aef39f274417f262aee3bc6c907e5f75ae (patch) | |
| tree | 44d8afb122ca365c1267232f125eef9adbaf4793 | |
| parent | 625ca0d94cb13ac6f1109e0a13d2de5517a73c10 (diff) | |
| download | linux-next-22fe73aef39f274417f262aee3bc6c907e5f75ae.tar.gz linux-next-22fe73aef39f274417f262aee3bc6c907e5f75ae.zip | |
RDMA/rxe: Allow queue VMAs to outlive ucontexts
Prepare queue mappings for asynchronous ucontext disassociation during
device disable. Rely on the VMA page references to preserve mapped
memory until the final unmap.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20260716132316.1495242-13-jiri@resnulli.us
Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_mmap.c | 35 |
1 files changed, 2 insertions, 33 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_mmap.c b/drivers/infiniband/sw/rxe/rxe_mmap.c index 7f723a2f3700..a4ead89ccbd3 100644 --- a/drivers/infiniband/sw/rxe/rxe_mmap.c +++ b/drivers/infiniband/sw/rxe/rxe_mmap.c @@ -11,7 +11,6 @@ #include "rxe.h" #include "rxe_loc.h" -#include "rxe_queue.h" void rxe_mmap_release(struct kref *ref) { @@ -30,29 +29,6 @@ void rxe_mmap_release(struct kref *ref) kfree(ip); } -/* - * open and close keep track of how many times the memory region is mapped, - * to avoid releasing it. - */ -static void rxe_vma_open(struct vm_area_struct *vma) -{ - struct rxe_mmap_info *ip = vma->vm_private_data; - - kref_get(&ip->ref); -} - -static void rxe_vma_close(struct vm_area_struct *vma) -{ - struct rxe_mmap_info *ip = vma->vm_private_data; - - kref_put(&ip->ref, rxe_mmap_release); -} - -static const struct vm_operations_struct rxe_vm_ops = { - .open = rxe_vma_open, - .close = rxe_vma_close, -}; - /** * rxe_mmap - create a new mmap region * @context: the IB user context of the process making the mmap() call @@ -106,17 +82,10 @@ found_it: list_del_init(&ip->pending_mmaps); spin_unlock_bh(&rxe->pending_lock); - vma->vm_ops = &rxe_vm_ops; - vma->vm_private_data = ip; - ret = remap_vmalloc_range(vma, ip->obj, 0); - if (ret) { - vma->vm_private_data = NULL; - vma->vm_ops = NULL; - kref_put(&ip->ref, rxe_mmap_release); + kref_put(&ip->ref, rxe_mmap_release); + if (ret) rxe_dbg_dev(rxe, "err %d from remap_vmalloc_range\n", ret); - goto done; - } done: return ret; |