From: Jason Wang <jasowang@redhat.com>
To: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org,
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Cc: virtualization@lists.linux-foundation.org,
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xiao.w.wang@intel.com, haotian.wang@sifive.com,
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rodrigo.vivi@intel.com, airlied@linux.ie, daniel@ffwll.ch,
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gor@linux.ibm.com, borntraeger@de.ibm.com,
akrowiak@linux.ibm.com, freude@linux.ibm.com,
lingshan.zhu@intel.com, idos@mellanox.com, eperezma@redhat.com,
lulu@redhat.com, parav@mellanox.com,
christophe.de.dinechin@gmail.com, kevin.tian@intel.com,
Jason Wang <jasowang@redhat.com>
Subject: [PATCH V3 5/7] mdev: introduce virtio device and its device ops
Date: Fri, 11 Oct 2019 16:15:55 +0800 [thread overview]
Message-ID: <20191011081557.28302-6-jasowang@redhat.com> (raw)
In-Reply-To: <20191011081557.28302-1-jasowang@redhat.com>
This patch implements basic support for mdev driver that supports
virtio transport for kernel virtio driver.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
include/linux/mdev.h | 1 +
include/linux/virtio_mdev.h | 148 ++++++++++++++++++++++++++++++++++++
2 files changed, 149 insertions(+)
create mode 100644 include/linux/virtio_mdev.h
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index f491308674e5..298581e7ad45 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -124,6 +124,7 @@ struct mdev_device *mdev_from_dev(struct device *dev);
enum {
MDEV_ID_VFIO = 1,
+ MDEV_ID_VIRTIO = 2,
/* New entries must be added here */
};
diff --git a/include/linux/virtio_mdev.h b/include/linux/virtio_mdev.h
new file mode 100644
index 000000000000..b39c62534acc
--- /dev/null
+++ b/include/linux/virtio_mdev.h
@@ -0,0 +1,148 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Virtio mediated device driver
+ *
+ * Copyright 2019, Red Hat Corp.
+ * Author: Jason Wang <jasowang@redhat.com>
+ */
+#ifndef _LINUX_VIRTIO_MDEV_H
+#define _LINUX_VIRTIO_MDEV_H
+
+#include <linux/interrupt.h>
+#include <linux/mdev.h>
+#include <uapi/linux/vhost.h>
+
+#define VIRTIO_MDEV_DEVICE_API_STRING "virtio-mdev"
+#define VIRTIO_MDEV_F_VERSION_1 0x1
+
+struct virtio_mdev_callback {
+ irqreturn_t (*callback)(void *data);
+ void *private;
+};
+
+/**
+ * struct vfio_mdev_device_ops - Structure to be registered for each
+ * mdev device to register the device to virtio-mdev module.
+ *
+ * @set_vq_address: Set the address of virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * @desc_area: address of desc area
+ * @driver_area: address of driver area
+ * @device_area: address of device area
+ * Returns integer: success (0) or error (< 0)
+ * @set_vq_num: Set the size of virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * @num: the size of virtqueue
+ * @kick_vq: Kick the virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * @set_vq_cb: Set the interrut calback function for
+ * a virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * @cb: virtio-mdev interrupt callback structure
+ * @set_vq_ready: Set ready status for a virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * @ready: ready (true) not ready(false)
+ * @get_vq_ready: Get ready status for a virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * Returns boolean: ready (true) or not (false)
+ * @set_vq_state: Set the state for a virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * @state: virtqueue state (last_avail_idx)
+ * Returns integer: success (0) or error (< 0)
+ * @get_vq_state: Get the state for a virtqueue
+ * @mdev: mediated device
+ * @idx: virtqueue index
+ * Returns virtqueue state (last_avail_idx)
+ * @get_vq_align: Get the virtqueue align requirement
+ * for the device
+ * @mdev: mediated device
+ * Returns virtqueue algin requirement
+ * @get_features: Get virtio features supported by the device
+ * @mdev: mediated device
+ * Returns the virtio features support by the
+ * device
+ * @get_features: Set virtio features supported by the driver
+ * @mdev: mediated device
+ * @features: feature support by the driver
+ * Returns integer: success (0) or error (< 0)
+ * @set_config_cb: Set the config interrupt callback
+ * @mdev: mediated device
+ * @cb: virtio-mdev interrupt callback structure
+ * @get_vq_num_max: Get the max size of virtqueue
+ * @mdev: mediated device
+ * Returns u16: max size of virtqueue
+ * @get_device_id: Get virtio device id
+ * @mdev: mediated device
+ * Returns u32: virtio device id
+ * @get_vendor_id: Get virtio vendor id
+ * @mdev: mediated device
+ * Returns u32: virtio vendor id
+ * @get_status: Get the device status
+ * @mdev: mediated device
+ * Returns u8: virtio device status
+ * @set_status: Set the device status
+ * @mdev: mediated device
+ * @status: virtio device status
+ * @get_config: Read from device specific configuration space
+ * @mdev: mediated device
+ * @offset: offset from the beginning of
+ * configuration space
+ * @buf: buffer used to read to
+ * @len: the length to read from
+ * configration space
+ * @set_config: Write to device specific configuration space
+ * @mdev: mediated device
+ * @offset: offset from the beginning of
+ * configuration space
+ * @buf: buffer used to write from
+ * @len: the length to write to
+ * configration space
+ * @get_mdev_features: Get the feature of virtio mdev device
+ * @mdev: mediated device
+ * Returns the mdev features (API) support by
+ * the device.
+ * @get_generation: Get device generaton
+ * @mdev: mediated device
+ * Returns u32: device generation
+ */
+struct virtio_mdev_device_ops {
+ /* Virtqueue ops */
+ int (*set_vq_address)(struct mdev_device *mdev,
+ u16 idx, u64 desc_area, u64 driver_area,
+ u64 device_area);
+ void (*set_vq_num)(struct mdev_device *mdev, u16 idx, u32 num);
+ void (*kick_vq)(struct mdev_device *mdev, u16 idx);
+ void (*set_vq_cb)(struct mdev_device *mdev, u16 idx,
+ struct virtio_mdev_callback *cb);
+ void (*set_vq_ready)(struct mdev_device *mdev, u16 idx, bool ready);
+ bool (*get_vq_ready)(struct mdev_device *mdev, u16 idx);
+ int (*set_vq_state)(struct mdev_device *mdev, u16 idx, u64 state);
+ u64 (*get_vq_state)(struct mdev_device *mdev, u16 idx);
+
+ /* Device ops */
+ u16 (*get_vq_align)(struct mdev_device *mdev);
+ u64 (*get_features)(struct mdev_device *mdev);
+ int (*set_features)(struct mdev_device *mdev, u64 features);
+ void (*set_config_cb)(struct mdev_device *mdev,
+ struct virtio_mdev_callback *cb);
+ u16 (*get_vq_num_max)(struct mdev_device *mdev);
+ u32 (*get_device_id)(struct mdev_device *mdev);
+ u32 (*get_vendor_id)(struct mdev_device *mdev);
+ u8 (*get_status)(struct mdev_device *mdev);
+ void (*set_status)(struct mdev_device *mdev, u8 status);
+ void (*get_config)(struct mdev_device *mdev, unsigned int offset,
+ void *buf, unsigned int len);
+ void (*set_config)(struct mdev_device *mdev, unsigned int offset,
+ const void *buf, unsigned int len);
+ u64 (*get_mdev_features)(struct mdev_device *mdev);
+ u32 (*get_generation)(struct mdev_device *mdev);
+};
+
+#endif
--
2.19.1
next prev parent reply other threads:[~2019-10-11 8:19 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 8:15 [PATCH V3 0/7] mdev based hardware virtio offloading support Jason Wang
2019-10-11 8:15 ` [PATCH V3 1/7] mdev: class id support Jason Wang
2019-10-15 10:26 ` Cornelia Huck
2019-10-15 12:12 ` Jason Wang
2019-10-15 16:38 ` Alex Williamson
2019-10-16 4:38 ` Jason Wang
2019-10-16 4:57 ` Parav Pandit
2019-10-16 10:37 ` Jason Wang
2019-10-17 8:27 ` Jason Wang
2019-10-11 8:15 ` [PATCH V3 2/7] mdev: bus uevent support Jason Wang
2019-10-15 10:27 ` Cornelia Huck
2019-10-15 12:13 ` Jason Wang
2019-10-16 5:06 ` Parav Pandit
2019-10-11 8:15 ` [PATCH V3 3/7] modpost: add support for mdev class id Jason Wang
2019-10-11 8:15 ` [PATCH V3 4/7] mdev: introduce device specific ops Jason Wang
2019-10-15 10:41 ` Cornelia Huck
2019-10-15 12:17 ` Jason Wang
2019-10-15 17:26 ` Alex Williamson
2019-10-11 8:15 ` Jason Wang [this message]
2019-10-14 17:23 ` [PATCH V3 5/7] mdev: introduce virtio device and its device ops Stefan Hajnoczi
2019-10-15 3:27 ` Jason Wang
2019-10-11 8:15 ` [PATCH V3 6/7] virtio: introduce a mdev based transport Jason Wang
2019-10-14 17:39 ` Stefan Hajnoczi
2019-10-15 3:29 ` Jason Wang
2019-10-11 8:15 ` [PATCH V3 7/7] docs: sample driver to demonstrate how to implement virtio-mdev framework Jason Wang
2019-10-14 17:49 ` [PATCH V3 0/7] mdev based hardware virtio offloading support Stefan Hajnoczi
2019-10-15 3:37 ` Jason Wang
2019-10-15 14:37 ` Stefan Hajnoczi
2019-10-17 1:42 ` Jason Wang
2019-10-17 9:43 ` Stefan Hajnoczi
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