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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Browse Source 
Pull virtio updates from Michael Tsirkin:
 "virtio: virtio 1.0 support, misc patches

  This adds a lot of infrastructure for virtio 1.0 support.  Notable
  missing pieces: virtio pci, virtio balloon (needs spec extension),
  vhost scsi.

  Plus, there are some minor fixes in a couple of places.

  Note: some net drivers are affected by these patches.  David said he's
  fine with merging these patches through my tree.

  Rusty's on vacation, he acked using my tree for these, too"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (70 commits)
  virtio_ccw: finalize_features error handling
  virtio_ccw: future-proof finalize_features
  virtio_pci: rename virtio_pci -> virtio_pci_common
  virtio_pci: update file descriptions and copyright
  virtio_pci: split out legacy device support
  virtio_pci: setup config vector indirectly
  virtio_pci: setup vqs indirectly
  virtio_pci: delete vqs indirectly
  virtio_pci: use priv for vq notification
  virtio_pci: free up vq->priv
  virtio_pci: fix coding style for structs
  virtio_pci: add isr field
  virtio: drop legacy_only driver flag
  virtio_balloon: drop legacy_only driver flag
  virtio_ccw: rev 1 devices set VIRTIO_F_VERSION_1
  virtio: allow finalize_features to fail
  virtio_ccw: legacy: don't negotiate rev 1/features
  virtio: add API to detect legacy devices
  virtio_console: fix sparse warnings
  vhost: remove unnecessary forward declarations in vhost.h
  ...
This commit is contained in:
Linus Torvalds
2014-12-11 12:20:31 -08:00
parent 14ba9a2e4b f01a2a811a
commit 6b9e2cea42
40 changed files with 2050 additions and 1430 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/uapi/linux/Kbuild
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@@ -424,10 +424,12 @@ header-y += virtio_blk.h
header-y += virtio_config.h
header-y += virtio_console.h
header-y += virtio_ids.h
header-y += virtio_types.h
header-y += virtio_net.h
header-y += virtio_pci.h
header-y += virtio_ring.h
header-y += virtio_rng.h
header-y += virtio_scsi.h
header-y += vm_sockets.h
header-y += vt.h
header-y += wait.h

17
include/uapi/linux/if_tun.h
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@@ -22,21 +22,11 @@
/* Read queue size */
#define TUN_READQ_SIZE 500
/* TUN device flags */
#define TUN_TUN_DEV 0x0001
#define TUN_TAP_DEV 0x0002
/* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */
#define TUN_TUN_DEV IFF_TUN
#define TUN_TAP_DEV IFF_TAP
#define TUN_TYPE_MASK 0x000f
#define TUN_FASYNC 0x0010
#define TUN_NOCHECKSUM 0x0020
#define TUN_NO_PI 0x0040
/* This flag has no real effect */
#define TUN_ONE_QUEUE 0x0080
#define TUN_PERSIST 0x0100
#define TUN_VNET_HDR 0x0200
#define TUN_TAP_MQ 0x0400
/* Ioctl defines */
#define TUNSETNOCSUM _IOW('T', 200, int)
#define TUNSETDEBUG _IOW('T', 201, int)
@@ -67,6 +57,7 @@
#define IFF_ONE_QUEUE 0x2000
#define IFF_VNET_HDR 0x4000
#define IFF_TUN_EXCL 0x8000
#define IFF_VNET_LE 0x10000
#define IFF_MULTI_QUEUE 0x0100
#define IFF_ATTACH_QUEUE 0x0200
#define IFF_DETACH_QUEUE 0x0400

15
include/uapi/linux/virtio_blk.h
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@@ -28,6 +28,7 @@
#include <linux/types.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
#include <linux/virtio_types.h>
/* Feature bits */
#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
@@ -114,18 +115,18 @@ struct virtio_blk_config {
/* This is the first element of the read scatter-gather list. */
struct virtio_blk_outhdr {
/* VIRTIO_BLK_T* */
__u32 type;
__virtio32 type;
/* io priority. */
__u32 ioprio;
__virtio32 ioprio;
/* Sector (ie. 512 byte offset) */
__u64 sector;
__virtio64 sector;
};
struct virtio_scsi_inhdr {
__u32 errors;
__u32 data_len;
__u32 sense_len;
__u32 residual;
__virtio32 errors;
__virtio32 data_len;
__virtio32 sense_len;
__virtio32 residual;
};
/* And this is the final byte of the write scatter-gather list. */

9
include/uapi/linux/virtio_config.h
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@@ -38,14 +38,16 @@
#define VIRTIO_CONFIG_S_DRIVER 2
/* Driver has used its parts of the config, and is happy */
#define VIRTIO_CONFIG_S_DRIVER_OK 4
/* Driver has finished configuring features */
#define VIRTIO_CONFIG_S_FEATURES_OK 8
/* We've given up on this device. */
#define VIRTIO_CONFIG_S_FAILED 0x80
/* Some virtio feature bits (currently bits 28 through 31) are reserved for the
/* Some virtio feature bits (currently bits 28 through 32) are reserved for the
* transport being used (eg. virtio_ring), the rest are per-device feature
* bits. */
#define VIRTIO_TRANSPORT_F_START 28
#define VIRTIO_TRANSPORT_F_END 32
#define VIRTIO_TRANSPORT_F_END 33
/* Do we get callbacks when the ring is completely used, even if we've
* suppressed them? */
@@ -54,4 +56,7 @@
/* Can the device handle any descriptor layout? */
#define VIRTIO_F_ANY_LAYOUT 27
/* v1.0 compliant. */
#define VIRTIO_F_VERSION_1 32
#endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */

7
include/uapi/linux/virtio_console.h
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@@ -32,6 +32,7 @@
#ifndef _UAPI_LINUX_VIRTIO_CONSOLE_H
#define _UAPI_LINUX_VIRTIO_CONSOLE_H
#include <linux/types.h>
#include <linux/virtio_types.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
@@ -58,9 +59,9 @@ struct virtio_console_config {
* particular port.
*/
struct virtio_console_control {
__u32 id; /* Port number */
__u16 event; /* The kind of control event (see below) */
__u16 value; /* Extra information for the key */
__virtio32 id; /* Port number */
__virtio16 event; /* The kind of control event (see below) */
__virtio16 value; /* Extra information for the key */
};
/* Some events for control messages */

15
include/uapi/linux/virtio_net.h
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@@ -28,6 +28,7 @@
#include <linux/types.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
#include <linux/virtio_types.h>
#include <linux/if_ether.h>
/* The feature bitmap for virtio net */
@@ -84,17 +85,17 @@ struct virtio_net_hdr {
#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
__u8 gso_type;
__u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
__u16 gso_size; /* Bytes to append to hdr_len per frame */
__u16 csum_start; /* Position to start checksumming from */
__u16 csum_offset; /* Offset after that to place checksum */
__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
__virtio16 csum_start; /* Position to start checksumming from */
__virtio16 csum_offset; /* Offset after that to place checksum */
};
/* This is the version of the header to use when the MRG_RXBUF
* feature has been negotiated. */
struct virtio_net_hdr_mrg_rxbuf {
struct virtio_net_hdr hdr;
__u16 num_buffers; /* Number of merged rx buffers */
__virtio16 num_buffers; /* Number of merged rx buffers */
};
/*
@@ -149,7 +150,7 @@ typedef __u8 virtio_net_ctrl_ack;
* VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
*/
struct virtio_net_ctrl_mac {
__u32 entries;
__virtio32 entries;
__u8 macs[][ETH_ALEN];
} __attribute__((packed));
@@ -193,7 +194,7 @@ struct virtio_net_ctrl_mac {
* specified.
*/
struct virtio_net_ctrl_mq {
__u16 virtqueue_pairs;
__virtio16 virtqueue_pairs;
};
#define VIRTIO_NET_CTRL_MQ 4

45
include/uapi/linux/virtio_ring.h
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@@ -32,6 +32,7 @@
*
* Copyright Rusty Russell IBM Corporation 2007. */
#include <linux/types.h>
#include <linux/virtio_types.h>
/* This marks a buffer as continuing via the next field. */
#define VRING_DESC_F_NEXT 1
@@ -61,32 +62,32 @@
/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */
struct vring_desc {
/* Address (guest-physical). */
__u64 addr;
__virtio64 addr;
/* Length. */
__u32 len;
__virtio32 len;
/* The flags as indicated above. */
__u16 flags;
__virtio16 flags;
/* We chain unused descriptors via this, too */
__u16 next;
__virtio16 next;
};
struct vring_avail {
__u16 flags;
__u16 idx;
__u16 ring[];
__virtio16 flags;
__virtio16 idx;
__virtio16 ring[];
};
/* u32 is used here for ids for padding reasons. */
struct vring_used_elem {
/* Index of start of used descriptor chain. */
__u32 id;
__virtio32 id;
/* Total length of the descriptor chain which was used (written to) */
__u32 len;
__virtio32 len;
};
struct vring_used {
__u16 flags;
__u16 idx;
__virtio16 flags;
__virtio16 idx;
struct vring_used_elem ring[];
};
@@ -109,25 +110,25 @@ struct vring {
* struct vring_desc desc[num];
*
* // A ring of available descriptor heads with free-running index.
* __u16 avail_flags;
* __u16 avail_idx;
* __u16 available[num];
* __u16 used_event_idx;
* __virtio16 avail_flags;
* __virtio16 avail_idx;
* __virtio16 available[num];
* __virtio16 used_event_idx;
*
* // Padding to the next align boundary.
* char pad[];
*
* // A ring of used descriptor heads with free-running index.
* __u16 used_flags;
* __u16 used_idx;
* __virtio16 used_flags;
* __virtio16 used_idx;
* struct vring_used_elem used[num];
* __u16 avail_event_idx;
* __virtio16 avail_event_idx;
* };
*/
/* We publish the used event index at the end of the available ring, and vice
* versa. They are at the end for backwards compatibility. */
#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
#define vring_avail_event(vr) (*(__u16 *)&(vr)->used->ring[(vr)->num])
#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
static inline void vring_init(struct vring *vr, unsigned int num, void *p,
unsigned long align)
@@ -135,15 +136,15 @@ static inline void vring_init(struct vring *vr, unsigned int num, void *p,
vr->num = num;
vr->desc = p;
vr->avail = p + num*sizeof(struct vring_desc);
vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + sizeof(__u16)
vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + sizeof(__virtio16)
+ align-1) & ~(align - 1));
}
static inline unsigned vring_size(unsigned int num, unsigned long align)
{
return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (3 + num)
return ((sizeof(struct vring_desc) * num + sizeof(__virtio16) * (3 + num)
+ align - 1) & ~(align - 1))
+ sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num;
+ sizeof(__virtio16) * 3 + sizeof(struct vring_used_elem) * num;
}
/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */

164
include/uapi/linux/virtio_scsi.h Normal file
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@@ -0,0 +1,164 @@
/*
* This header is BSD licensed so anyone can use the definitions to implement
* compatible drivers/servers.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _LINUX_VIRTIO_SCSI_H
#define _LINUX_VIRTIO_SCSI_H
#include <linux/virtio_types.h>
#define VIRTIO_SCSI_CDB_SIZE 32
#define VIRTIO_SCSI_SENSE_SIZE 96
/* SCSI command request, followed by data-out */
struct virtio_scsi_cmd_req {
__u8 lun[8]; /* Logical Unit Number */
__virtio64 tag; /* Command identifier */
__u8 task_attr; /* Task attribute */
__u8 prio; /* SAM command priority field */
__u8 crn;
__u8 cdb[VIRTIO_SCSI_CDB_SIZE];
} __attribute__((packed));
/* SCSI command request, followed by protection information */
struct virtio_scsi_cmd_req_pi {
__u8 lun[8]; /* Logical Unit Number */
__virtio64 tag; /* Command identifier */
__u8 task_attr; /* Task attribute */
__u8 prio; /* SAM command priority field */
__u8 crn;
__virtio32 pi_bytesout; /* DataOUT PI Number of bytes */
__virtio32 pi_bytesin; /* DataIN PI Number of bytes */
__u8 cdb[VIRTIO_SCSI_CDB_SIZE];
} __attribute__((packed));
/* Response, followed by sense data and data-in */
struct virtio_scsi_cmd_resp {
__virtio32 sense_len; /* Sense data length */
__virtio32 resid; /* Residual bytes in data buffer */
__virtio16 status_qualifier; /* Status qualifier */
__u8 status; /* Command completion status */
__u8 response; /* Response values */
__u8 sense[VIRTIO_SCSI_SENSE_SIZE];
} __attribute__((packed));
/* Task Management Request */
struct virtio_scsi_ctrl_tmf_req {
__virtio32 type;
__virtio32 subtype;
__u8 lun[8];
__virtio64 tag;
} __attribute__((packed));
struct virtio_scsi_ctrl_tmf_resp {
__u8 response;
} __attribute__((packed));
/* Asynchronous notification query/subscription */
struct virtio_scsi_ctrl_an_req {
__virtio32 type;
__u8 lun[8];
__virtio32 event_requested;
} __attribute__((packed));
struct virtio_scsi_ctrl_an_resp {
__virtio32 event_actual;
__u8 response;
} __attribute__((packed));
struct virtio_scsi_event {
__virtio32 event;
__u8 lun[8];
__virtio32 reason;
} __attribute__((packed));
struct virtio_scsi_config {
__u32 num_queues;
__u32 seg_max;
__u32 max_sectors;
__u32 cmd_per_lun;
__u32 event_info_size;
__u32 sense_size;
__u32 cdb_size;
__u16 max_channel;
__u16 max_target;
__u32 max_lun;
} __attribute__((packed));
/* Feature Bits */
#define VIRTIO_SCSI_F_INOUT 0
#define VIRTIO_SCSI_F_HOTPLUG 1
#define VIRTIO_SCSI_F_CHANGE 2
#define VIRTIO_SCSI_F_T10_PI 3
/* Response codes */
#define VIRTIO_SCSI_S_OK 0
#define VIRTIO_SCSI_S_OVERRUN 1
#define VIRTIO_SCSI_S_ABORTED 2
#define VIRTIO_SCSI_S_BAD_TARGET 3
#define VIRTIO_SCSI_S_RESET 4
#define VIRTIO_SCSI_S_BUSY 5
#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
#define VIRTIO_SCSI_S_TARGET_FAILURE 7
#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
#define VIRTIO_SCSI_S_FAILURE 9
#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
#define VIRTIO_SCSI_S_INCORRECT_LUN 12
/* Controlq type codes. */
#define VIRTIO_SCSI_T_TMF 0
#define VIRTIO_SCSI_T_AN_QUERY 1
#define VIRTIO_SCSI_T_AN_SUBSCRIBE 2
/* Valid TMF subtypes. */
#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
/* Events. */
#define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000
#define VIRTIO_SCSI_T_NO_EVENT 0
#define VIRTIO_SCSI_T_TRANSPORT_RESET 1
#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
#define VIRTIO_SCSI_T_PARAM_CHANGE 3
/* Reasons of transport reset event */
#define VIRTIO_SCSI_EVT_RESET_HARD 0
#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
#define VIRTIO_SCSI_S_SIMPLE 0
#define VIRTIO_SCSI_S_ORDERED 1
#define VIRTIO_SCSI_S_HEAD 2
#define VIRTIO_SCSI_S_ACA 3
#endif /* _LINUX_VIRTIO_SCSI_H */

46
include/uapi/linux/virtio_types.h Normal file
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@@ -0,0 +1,46 @@
#ifndef _UAPI_LINUX_VIRTIO_TYPES_H
#define _UAPI_LINUX_VIRTIO_TYPES_H
/* Type definitions for virtio implementations.
*
* This header is BSD licensed so anyone can use the definitions to implement
* compatible drivers/servers.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of IBM nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (C) 2014 Red Hat, Inc.
* Author: Michael S. Tsirkin <mst@redhat.com>
*/
#include <linux/types.h>
/*
* __virtio{16,32,64} have the following meaning:
* - __u{16,32,64} for virtio devices in legacy mode, accessed in native endian
* - __le{16,32,64} for standard-compliant virtio devices
*/
typedef __u16 __bitwise__ __virtio16;
typedef __u32 __bitwise__ __virtio32;
typedef __u64 __bitwise__ __virtio64;
#endif /* _UAPI_LINUX_VIRTIO_TYPES_H */