diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2024-07-16 13:35:51 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-17 05:43:21 -0400 |
| commit | 4c3b54af907e709609d3d8beca92d65e2f0cfd83 (patch) | |
| tree | 65bb3e6643a56a0d09c41abe27adbbd568ab1afe /include/linux/virtio.h | |
| parent | 7090f2b5ad33e9b6ba68eb927b02e8a286d21fb4 (diff) | |
virtio_pci_modern: use completion instead of busy loop to wait on admin cmd result
Currently, the code waits in a busy loop on every admin virtqueue issued
command to get a reply. That prevents callers from issuing multiple
commands in parallel.
To overcome this limitation, introduce a virtqueue event callback for
admin virtqueue. For every issued command, use completion mechanism
to wait on a reply. In the event callback, trigger the completion
is done for every incoming reply.
Alongside with that, introduce a spin lock to protect the admin
virtqueue operations.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240716113552.80599-13-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/virtio.h')
| -rw-r--r-- | include/linux/virtio.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 96fea920873b..999ff5934392 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -10,6 +10,7 @@ #include <linux/mod_devicetable.h> #include <linux/gfp.h> #include <linux/dma-mapping.h> +#include <linux/completion.h> /** * struct virtqueue - a queue to register buffers for sending or receiving. @@ -109,6 +110,8 @@ struct virtio_admin_cmd { __le64 group_member_id; struct scatterlist *data_sg; struct scatterlist *result_sg; + struct completion completion; + int ret; }; /** |