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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/include/hw/virtio/virtio.h | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/include/hw/virtio/virtio.h')
-rw-r--r-- | qemu/include/hw/virtio/virtio.h | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/qemu/include/hw/virtio/virtio.h b/qemu/include/hw/virtio/virtio.h new file mode 100644 index 000000000..cccae89d8 --- /dev/null +++ b/qemu/include/hw/virtio/virtio.h @@ -0,0 +1,290 @@ +/* + * Virtio Support + * + * Copyright IBM, Corp. 2007 + * + * Authors: + * Anthony Liguori <aliguori@us.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#ifndef _QEMU_VIRTIO_H +#define _QEMU_VIRTIO_H + +#include "hw/hw.h" +#include "net/net.h" +#include "hw/qdev.h" +#include "sysemu/sysemu.h" +#include "qemu/event_notifier.h" +#include "standard-headers/linux/virtio_config.h" +#include "standard-headers/linux/virtio_ring.h" + +/* A guest should never accept this. It implies negotiation is broken. */ +#define VIRTIO_F_BAD_FEATURE 30 + +#define VIRTIO_LEGACY_FEATURES ((0x1ULL << VIRTIO_F_BAD_FEATURE) | \ + (0x1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \ + (0x1ULL << VIRTIO_F_ANY_LAYOUT)) + +struct VirtQueue; + +static inline hwaddr vring_align(hwaddr addr, + unsigned long align) +{ + return (addr + align - 1) & ~(align - 1); +} + +typedef struct VirtQueue VirtQueue; + +#define VIRTQUEUE_MAX_SIZE 1024 + +typedef struct VirtQueueElement +{ + unsigned int index; + unsigned int out_num; + unsigned int in_num; + hwaddr in_addr[VIRTQUEUE_MAX_SIZE]; + hwaddr out_addr[VIRTQUEUE_MAX_SIZE]; + struct iovec in_sg[VIRTQUEUE_MAX_SIZE]; + struct iovec out_sg[VIRTQUEUE_MAX_SIZE]; +} VirtQueueElement; + +#define VIRTIO_QUEUE_MAX 1024 + +#define VIRTIO_NO_VECTOR 0xffff + +#define TYPE_VIRTIO_DEVICE "virtio-device" +#define VIRTIO_DEVICE_GET_CLASS(obj) \ + OBJECT_GET_CLASS(VirtioDeviceClass, obj, TYPE_VIRTIO_DEVICE) +#define VIRTIO_DEVICE_CLASS(klass) \ + OBJECT_CLASS_CHECK(VirtioDeviceClass, klass, TYPE_VIRTIO_DEVICE) +#define VIRTIO_DEVICE(obj) \ + OBJECT_CHECK(VirtIODevice, (obj), TYPE_VIRTIO_DEVICE) + +enum virtio_device_endian { + VIRTIO_DEVICE_ENDIAN_UNKNOWN, + VIRTIO_DEVICE_ENDIAN_LITTLE, + VIRTIO_DEVICE_ENDIAN_BIG, +}; + +struct VirtIODevice +{ + DeviceState parent_obj; + const char *name; + uint8_t status; + uint8_t isr; + uint16_t queue_sel; + uint64_t guest_features; + uint64_t host_features; + size_t config_len; + void *config; + uint16_t config_vector; + uint32_t generation; + int nvectors; + VirtQueue *vq; + uint16_t device_id; + bool vm_running; + VMChangeStateEntry *vmstate; + char *bus_name; + uint8_t device_endian; + QLIST_HEAD(, VirtQueue) *vector_queues; +}; + +typedef struct VirtioDeviceClass { + /*< private >*/ + DeviceClass parent; + /*< public >*/ + + /* This is what a VirtioDevice must implement */ + DeviceRealize realize; + DeviceUnrealize unrealize; + uint64_t (*get_features)(VirtIODevice *vdev, + uint64_t requested_features, + Error **errp); + uint64_t (*bad_features)(VirtIODevice *vdev); + void (*set_features)(VirtIODevice *vdev, uint64_t val); + int (*validate_features)(VirtIODevice *vdev); + void (*get_config)(VirtIODevice *vdev, uint8_t *config); + void (*set_config)(VirtIODevice *vdev, const uint8_t *config); + void (*reset)(VirtIODevice *vdev); + void (*set_status)(VirtIODevice *vdev, uint8_t val); + /* Test and clear event pending status. + * Should be called after unmask to avoid losing events. + * If backend does not support masking, + * must check in frontend instead. + */ + bool (*guest_notifier_pending)(VirtIODevice *vdev, int n); + /* Mask/unmask events from this vq. Any events reported + * while masked will become pending. + * If backend does not support masking, + * must mask in frontend instead. + */ + void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask); + void (*save)(VirtIODevice *vdev, QEMUFile *f); + int (*load)(VirtIODevice *vdev, QEMUFile *f, int version_id); +} VirtioDeviceClass; + +void virtio_instance_init_common(Object *proxy_obj, void *data, + size_t vdev_size, const char *vdev_name); + +void virtio_init(VirtIODevice *vdev, const char *name, + uint16_t device_id, size_t config_size); +void virtio_cleanup(VirtIODevice *vdev); + +/* Set the child bus name. */ +void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name); + +VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, + void (*handle_output)(VirtIODevice *, + VirtQueue *)); + +void virtio_del_queue(VirtIODevice *vdev, int n); + +void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, + unsigned int len); +void virtqueue_flush(VirtQueue *vq, unsigned int count); +void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, + unsigned int len, unsigned int idx); + +void virtqueue_map_sg(struct iovec *sg, hwaddr *addr, + size_t num_sg, int is_write); +int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem); +int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes, + unsigned int out_bytes); +void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, + unsigned int *out_bytes, + unsigned max_in_bytes, unsigned max_out_bytes); + +void virtio_notify(VirtIODevice *vdev, VirtQueue *vq); + +void virtio_save(VirtIODevice *vdev, QEMUFile *f); + +int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id); + +void virtio_notify_config(VirtIODevice *vdev); + +void virtio_queue_set_notification(VirtQueue *vq, int enable); + +int virtio_queue_ready(VirtQueue *vq); + +int virtio_queue_empty(VirtQueue *vq); + +/* Host binding interface. */ + +uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); +uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); +uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); +void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data); +void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data); +void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data); +uint32_t virtio_config_modern_readb(VirtIODevice *vdev, uint32_t addr); +uint32_t virtio_config_modern_readw(VirtIODevice *vdev, uint32_t addr); +uint32_t virtio_config_modern_readl(VirtIODevice *vdev, uint32_t addr); +void virtio_config_modern_writeb(VirtIODevice *vdev, + uint32_t addr, uint32_t data); +void virtio_config_modern_writew(VirtIODevice *vdev, + uint32_t addr, uint32_t data); +void virtio_config_modern_writel(VirtIODevice *vdev, + uint32_t addr, uint32_t data); +void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); +hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n); +void virtio_queue_set_num(VirtIODevice *vdev, int n, int num); +int virtio_queue_get_num(VirtIODevice *vdev, int n); +int virtio_get_num_queues(VirtIODevice *vdev); +void virtio_queue_set_rings(VirtIODevice *vdev, int n, hwaddr desc, + hwaddr avail, hwaddr used); +void virtio_queue_update_rings(VirtIODevice *vdev, int n); +void virtio_queue_set_align(VirtIODevice *vdev, int n, int align); +void virtio_queue_notify(VirtIODevice *vdev, int n); +uint16_t virtio_queue_vector(VirtIODevice *vdev, int n); +void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector); +int virtio_set_status(VirtIODevice *vdev, uint8_t val); +void virtio_reset(void *opaque); +void virtio_update_irq(VirtIODevice *vdev); +int virtio_set_features(VirtIODevice *vdev, uint64_t val); + +/* Base devices. */ +typedef struct VirtIOBlkConf VirtIOBlkConf; +struct virtio_net_conf; +typedef struct virtio_serial_conf virtio_serial_conf; +typedef struct virtio_input_conf virtio_input_conf; +typedef struct VirtIOSCSIConf VirtIOSCSIConf; +typedef struct VirtIORNGConf VirtIORNGConf; + +#define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \ + DEFINE_PROP_BIT64("indirect_desc", _state, _field, \ + VIRTIO_RING_F_INDIRECT_DESC, true), \ + DEFINE_PROP_BIT64("event_idx", _state, _field, \ + VIRTIO_RING_F_EVENT_IDX, true), \ + DEFINE_PROP_BIT64("notify_on_empty", _state, _field, \ + VIRTIO_F_NOTIFY_ON_EMPTY, true), \ + DEFINE_PROP_BIT64("any_layout", _state, _field, \ + VIRTIO_F_ANY_LAYOUT, true) + +hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_avail_addr(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_used_addr(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_ring_addr(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n); +hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, int n); +uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n); +void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); +void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n); +VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n); +uint16_t virtio_get_queue_index(VirtQueue *vq); +int virtio_queue_get_id(VirtQueue *vq); +EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); +void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, + bool with_irqfd); +EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); +void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign, + bool set_handler); +void virtio_queue_notify_vq(VirtQueue *vq); +void virtio_irq(VirtQueue *vq); +VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector); +VirtQueue *virtio_vector_next_queue(VirtQueue *vq); + +static inline void virtio_add_feature(uint64_t *features, unsigned int fbit) +{ + assert(fbit < 64); + *features |= (1ULL << fbit); +} + +static inline void virtio_clear_feature(uint64_t *features, unsigned int fbit) +{ + assert(fbit < 64); + *features &= ~(1ULL << fbit); +} + +static inline bool __virtio_has_feature(uint64_t features, unsigned int fbit) +{ + assert(fbit < 64); + return !!(features & (1ULL << fbit)); +} + +static inline bool virtio_has_feature(VirtIODevice *vdev, unsigned int fbit) +{ + return __virtio_has_feature(vdev->guest_features, fbit); +} + +static inline bool virtio_host_has_feature(VirtIODevice *vdev, + unsigned int fbit) +{ + return __virtio_has_feature(vdev->host_features, fbit); +} + +static inline bool virtio_is_big_endian(VirtIODevice *vdev) +{ + if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) { + assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN); + return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG; + } + /* Devices conforming to VIRTIO 1.0 or later are always LE. */ + return false; +} +#endif |