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RDMA/uverbs: Add support for UCAPs in context creation

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Add support for file descriptor array attribute for GET_CONTEXT
commands.

Check that the file descriptor (fd) array represents fds for valid UCAPs.
Store the enabled UCAPs from the fd array as a bitmask in ib_ucontext.

Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/ebfb30bc947e2259b193c96a319c80e82599045b.1741261611.git.leon@kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Chiara Meiohas
2025-03-06 13:51:28 +02:00
committed by Leon Romanovsky
parent cf7174e898
commit fe9d7822ba
4 changed files with 25 additions and 0 deletions
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19
drivers/infiniband/core/uverbs_cmd.c
View File

@@ -42,6 +42,7 @@
#include <rdma/uverbs_types.h>
#include <rdma/uverbs_std_types.h>
#include <rdma/ib_ucaps.h>
#include "rdma_core.h"
#include "uverbs.h"
@@ -232,6 +233,8 @@ int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
{
struct ib_ucontext *ucontext = attrs->context;
struct ib_uverbs_file *file = attrs->ufile;
int *fd_array;
int fd_count;
int ret;
if (!down_read_trylock(&file->hw_destroy_rwsem))
@@ -247,6 +250,22 @@ int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
if (ret)
goto err;
if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_GET_CONTEXT_FD_ARR)) {
fd_count = uverbs_attr_ptr_get_array_size(attrs,
UVERBS_ATTR_GET_CONTEXT_FD_ARR,
sizeof(int));
if (fd_count < 0) {
ret = fd_count;
goto err_uncharge;
}
fd_array = uverbs_attr_get_alloced_ptr(attrs,
UVERBS_ATTR_GET_CONTEXT_FD_ARR);
ret = ib_get_ucaps(fd_array, fd_count, &ucontext->enabled_caps);
if (ret)
goto err_uncharge;
}
ret = ucontext->device->ops.alloc_ucontext(ucontext,
&attrs->driver_udata);
if (ret)

4
drivers/infiniband/core/uverbs_std_types_device.c
View File

@@ -437,6 +437,10 @@ DECLARE_UVERBS_NAMED_METHOD(
UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,
UVERBS_ATTR_TYPE(u64), UA_OPTIONAL),
UVERBS_ATTR_PTR_IN(UVERBS_ATTR_GET_CONTEXT_FD_ARR,
UVERBS_ATTR_MIN_SIZE(sizeof(int)),
UA_OPTIONAL,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_UHW());
DECLARE_UVERBS_NAMED_METHOD(

1
include/rdma/ib_verbs.h
View File

@@ -1530,6 +1530,7 @@ struct ib_ucontext {
struct ib_uverbs_file *ufile;
struct ib_rdmacg_object cg_obj;
u64 enabled_caps;
/*
* Implementation details of the RDMA core, don't use in drivers:
*/

1
include/uapi/rdma/ib_user_ioctl_cmds.h
View File

@@ -88,6 +88,7 @@ enum uverbs_attrs_query_port_cmd_attr_ids {
enum uverbs_attrs_get_context_attr_ids {
UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,
UVERBS_ATTR_GET_CONTEXT_FD_ARR,
};
enum uverbs_attrs_query_context_attr_ids {