linux-stable.git/include/linux/vdpa.h, branch v5.13.2

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: Follow kdoc comment style

2021-05-03T08:55:51+00:00

Follow comment style mentioned in the Writing kernel-doc document [1].

Following warnings are fixed.
$ scripts/kernel-doc -v -none include/linux/vdpa.h
include/linux/vdpa.h:11: warning: missing initial short description on line:
 * vDPA callback definition.
include/linux/vdpa.h:11: info: Scanning doc for vDPA
include/linux/vdpa.h:15: warning: cannot understand function prototype: 'struct vdpa_callback '
include/linux/vdpa.h:21: warning: missing initial short description on line:
 * vDPA notification area
include/linux/vdpa.h:21: info: Scanning doc for vDPA
include/linux/vdpa.h:25: warning: cannot understand function prototype: 'struct vdpa_notification_area '
include/linux/vdpa.h:31: warning: missing initial short description on line:
 * vDPA vq_state definition
include/linux/vdpa.h:31: info: Scanning doc for vDPA
include/linux/vdpa.h:34: warning: cannot understand function prototype: 'struct vdpa_vq_state '
include/linux/vdpa.h:41: info: Scanning doc for vDPA device
include/linux/vdpa.h:51: warning: cannot understand function prototype: 'struct vdpa_device '
include/linux/vdpa.h:62: info: Scanning doc for vDPA IOVA range
include/linux/vdpa.h:66: warning: cannot understand function prototype: 'struct vdpa_iova_range '
include/linux/vdpa.h:72: info: Scanning doc for vDPA_config_ops
include/linux/vdpa.h:203: warning: cannot understand function prototype: 'struct vdpa_config_ops '
include/linux/vdpa.h:270: info: Scanning doc for vdpa_driver
include/linux/vdpa.h:275: warning: cannot understand function prototype: 'struct vdpa_driver '
include/linux/vdpa.h:347: info: Scanning doc for vdpa_mgmtdev_ops
include/linux/vdpa.h:360: warning: cannot understand function prototype: 'struct vdpa_mgmtdev_ops '

After this fix:

scripts/kernel-doc -v -none include/linux/vdpa.h
include/linux/vdpa.h:11: info: Scanning doc for struct vdpa_calllback
include/linux/vdpa.h:21: info: Scanning doc for struct vdpa_notification_area
include/linux/vdpa.h:31: info: Scanning doc for struct vdpa_vq_state
include/linux/vdpa.h:41: info: Scanning doc for struct vdpa_device
include/linux/vdpa.h:62: info: Scanning doc for struct vdpa_iova_range
include/linux/vdpa.h:72: info: Scanning doc for struct vdpa_config_ops
include/linux/vdpa.h:270: info: Scanning doc for struct vdpa_driver
include/linux/vdpa.h:347: info: Scanning doc for struct vdpa_mgmtdev_ops

[1] https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html

Signed-off-by: Parav Pandit 
Reviewed-by: Eli Cohen 
Link: https://lore.kernel.org/r/20210406170457.98481-2-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang 
Acked-by: Jason Wang

vdpa: set the virtqueue num during register

2021-02-25T19:26:00+00:00

This patch delay the queue number setting to vDPA device
registering. This allows us to probe the virtqueue numbers between
device allocation and registering.

Reviewed-by: Stefano Garzarella 
Signed-off-by: Jason Wang 
Link: https://lore.kernel.org/r/20210223061905.422659-3-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin

vdpa: Enable a user to add and delete a vdpa device

2021-02-23T12:52:56+00:00

Add the ability to add and delete a vdpa device.

Examples:
Create a vdpa device of type network named "foo2" from
the management device vdpasim:

$ vdpa dev add mgmtdev vdpasim_net name foo2

Delete the vdpa device after its use:
$ vdpa dev del foo2

Signed-off-by: Parav Pandit 
Reviewed-by: Eli Cohen 
Reviewed-by: Jason Wang 
Link: https://lore.kernel.org/r/20210105103203.82508-5-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin

vdpa: Define vdpa mgmt device, ops and a netlink interface

2021-02-23T12:52:56+00:00

To add one or more VDPA devices, define a management device which
allows adding or removing vdpa device. A management device defines
set of callbacks to manage vdpa devices.

To begin with, it defines add and remove callbacks through which a user
defined vdpa device can be added or removed.

A unique management device is identified by its unique handle identified
by management device name and optionally the bus name.

Hence, introduce routine through which driver can register a
management device and its callback operations for adding and remove
a vdpa device.

Introduce vdpa netlink socket family so that user can query management
device and its attributes.

Example of show vdpa management device which allows creating vdpa device of
networking class (device id = 0x1) of virtio specification 1.1
section 5.1.1.

$ vdpa mgmtdev show
vdpasim_net:
  supported_classes:
    net

Example of showing vdpa management device in JSON format.

$ vdpa mgmtdev show -jp
{
    "show": {
        "vdpasim_net": {
            "supported_classes": [ "net" ]
        }
    }
}

Signed-off-by: Parav Pandit 
Reviewed-by: Eli Cohen 
Reviewed-by: Jason Wang 
Link: https://lore.kernel.org/r/20210105103203.82508-4-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin 

Including a bugfix:

vpda: correctly size vdpa_nl_policy

We need to ensure last entry of vdpa_nl_policy[]
is zero, otherwise out-of-bounds access is hurting us.

Signed-off-by: Eric Dumazet 
Reported-by: syzbot 
Cc: Parav Pandit 
Cc: Eli Cohen 
Cc: Jason Wang 
Cc: Michael S. Tsirkin 
Link: https://lore.kernel.org/r/20210210134911.4119555-1-eric.dumazet@gmail.com
Signed-off-by: Michael S. Tsirkin

vdpa: Extend routine to accept vdpa device name

2021-02-23T12:52:56+00:00

In a subsequent patch, when user initiated command creates a vdpa device,
the user chooses the name of the vdpa device.
To support it, extend the device allocation API to consider this name
specified by the caller driver.

Signed-off-by: Parav Pandit 
Reviewed-by: Eli Cohen 
Acked-by: Jason Wang 
Link: https://lore.kernel.org/r/20210105103203.82508-3-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin

vdpa: Add missing comment for virtqueue count

2020-12-18T21:14:31+00:00

Add missing comment for number of virtqueue.

Signed-off-by: Parav Pandit 
Reviewed-by: Eli Cohen 
Acked-by: Jason Wang 
Link: https://lore.kernel.org/r/20201112064005.349268-2-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin

vdpa: introduce config op to get valid iova range

2020-10-23T15:55:27+00:00

This patch introduce a config op to get valid iova range from the vDPA
device.

Signed-off-by: Jason Wang 
Link: https://lore.kernel.org/r/20201023090043.14430-2-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin

vdpa: Modify get_vq_state() to return error code

2020-08-05T23:00:23+00:00

Modify get_vq_state() so it returns an error code. In case of hardware
acceleration, the available index may be retrieved from the device, an
operation that can possibly fail.

Reviewed-by: Parav Pandit 
Signed-off-by: Eli Cohen 
Link: https://lore.kernel.org/r/20200804162048.22587-9-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang

net/vdpa: Use struct for set/get vq state

2020-08-05T22:39:19+00:00

For now VQ state involves 16 bit available index value encoded in u64
variable. In the future it will be extended to contain more fields. Use
struct to contain the state, now containing only a single u16 for the
available index. In the future we can add fields to this struct.

Reviewed-by: Parav Pandit 
Acked-by: Jason Wang 
Signed-off-by: Eli Cohen 
Link: https://lore.kernel.org/r/20200804162048.22587-8-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin