linux-toradex.git/drivers/vdpa, branch v5.13-rc3

vDPA/ifcvf: get_config_size should return dev specific config size

2021-05-03T08:55:54+00:00

get_config_size() should return the size based on the decected
device type.

Signed-off-by: Zhu Lingshan 
Reviewed-by: Stefano Garzarella 
Acked-by: Jason Wang 
Link: https://lore.kernel.org/r/20210419063326.3748-4-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin

vDPA/ifcvf: enable Intel C5000X-PL virtio-block for vDPA

2021-05-03T08:55:54+00:00

This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-block
for vDPA.

Signed-off-by: Zhu Lingshan 
Reviewed-by: Stefano Garzarella 
Acked-by: Jason Wang 
Link: https://lore.kernel.org/r/20210419063326.3748-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin

vDPA/ifcvf: deduce VIRTIO device ID when probe

2021-05-03T08:55:54+00:00

This commit deduces VIRTIO device ID as device type when probe,
then ifcvf_vdpa_get_device_id() can simply return the ID.
ifcvf_vdpa_get_features() and ifcvf_vdpa_get_config_size()
can work properly based on the device ID.

Signed-off-by: Zhu Lingshan 
Link: https://lore.kernel.org/r/20210419063326.3748-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang

vdpa_sim_blk: add support for vdpa management tool

2021-05-03T08:55:53+00:00

Enable the user to create vDPA block simulator devices using the
vdpa management tool:

    # Show vDPA supported devices
    $ vdpa mgmtdev show
    vdpasim_blk:
      supported_classes block

    # Create a vDPA block device named as 'blk0' from the management
    # device vdpasim:
    $ vdpa dev add mgmtdev vdpasim_blk name blk0

    # Show the info of the 'blk0' device just created
    $ vdpa dev show blk0 -jp
    {
        "dev": {
            "blk0": {
                "type": "block",
                "mgmtdev": "vdpasim_blk",
                "vendor_id": 0,
                "max_vqs": 1,
                "max_vq_size": 256
            }
        }
    }

    # Delete the vDPA device after its use
    $ vdpa dev del blk0

Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-15-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang

vdpa_sim_blk: handle VIRTIO_BLK_T_GET_ID

2021-05-03T08:55:53+00:00

Handle VIRTIO_BLK_T_GET_ID request, always answering the
"vdpa_blk_sim" string.

Acked-by: Jason Wang 
Reviewed-by: Stefan Hajnoczi 
Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-14-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin

vdpa_sim_blk: implement ramdisk behaviour

2021-05-03T08:55:53+00:00

The previous implementation wrote only the status of each request.
This patch implements a more accurate block device simulator,
providing a ramdisk-like behavior and adding input validation.

Acked-by: Jason Wang 
Reviewed-by: Stefan Hajnoczi 
Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-13-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin

vdpa: add vdpa simulator for block device

2021-05-03T08:55:53+00:00

This will allow running vDPA for virtio block protocol.

It's a preliminary implementation with a simple request handling:
for each request, only the status (last byte) is set.
It's always set to VIRTIO_BLK_S_OK.

Also input validation is missing and will be added in the next commits.

Signed-off-by: Max Gurtovoy 
[sgarzare: various cleanups/fixes]
Acked-by: Jason Wang 
Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-12-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin

vdpa: add get_config_size callback in vdpa_config_ops

2021-05-03T08:55:53+00:00

This new callback is used to get the size of the configuration space
of vDPA devices.

Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-9-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang

vdpa_sim: cleanup kiovs in vdpasim_free()

2021-05-03T08:55:53+00:00

vringh_getdesc_iotlb() allocates memory to store the kvec, that
is freed with vringh_kiov_cleanup().

vringh_getdesc_iotlb() is able to reuse a kvec previously allocated,
so in order to avoid to allocate the kvec for each request, we are
not calling vringh_kiov_cleanup() when we finished to handle a
request, but we should call it when we free the entire device.

Acked-by: Jason Wang 
Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-8-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin

vringh: add 'iotlb_lock' to synchronize iotlb accesses

2021-05-03T08:55:52+00:00

Usually iotlb accesses are synchronized with a spinlock.
Let's request it as a new parameter in vringh_set_iotlb() and
hold it when we navigate the iotlb in iotlb_translate() to avoid
race conditions with any new additions/deletions of ranges from
the ioltb.

Acked-by: Jason Wang 
Signed-off-by: Stefano Garzarella 
Link: https://lore.kernel.org/r/20210315163450.254396-3-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin