#ifndef VIRTIO_H
#define VIRTIO_H
-#include "s390-ccw.h"
-
/* Status byte for guest to report progress, and synchronize features. */
/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
/* We've given up on this device. */
#define VIRTIO_CONFIG_S_FAILED 0x80
-enum virtio_dev_type {
+enum VirtioDevType {
VIRTIO_ID_NET = 1,
VIRTIO_ID_BLOCK = 2,
VIRTIO_ID_CONSOLE = 3,
VIRTIO_ID_BALLOON = 5,
+ VIRTIO_ID_SCSI = 8,
};
+typedef enum VirtioDevType VirtioDevType;
-struct virtio_dev_header {
- enum virtio_dev_type type : 8;
- u8 num_vq;
- u8 feature_len;
- u8 config_len;
- u8 status;
- u8 vqconfig[];
-} __attribute__((packed));
-
-struct virtio_vqconfig {
- u64 token;
- u64 address;
- u16 num;
- u8 pad[6];
-} __attribute__((packed));
-
-struct vq_info_block {
- u64 queue;
- u32 align;
- u16 index;
- u16 num;
+struct VqInfo {
+ uint64_t queue;
+ uint32_t align;
+ uint16_t index;
+ uint16_t num;
} __attribute__((packed));
+typedef struct VqInfo VqInfo;
-struct vq_config_block {
- u16 index;
- u16 num;
+struct VqConfig {
+ uint16_t index;
+ uint16_t num;
} __attribute__((packed));
+typedef struct VqConfig VqConfig;
-struct virtio_dev {
- struct virtio_dev_header *header;
- struct virtio_vqconfig *vqconfig;
- char *host_features;
- char *guest_features;
- char *config;
-};
-
-#define KVM_S390_VIRTIO_RING_ALIGN 4096
+#define VIRTIO_RING_SIZE (PAGE_SIZE * 8)
+#define VIRTIO_MAX_VQS 3
+#define KVM_S390_VIRTIO_RING_ALIGN 4096
#define VRING_USED_F_NO_NOTIFY 1
#define VRING_HIDDEN_IS_CHAIN 256
/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */
-struct vring_desc {
+struct VRingDesc {
/* Address (guest-physical). */
- u64 addr;
+ uint64_t addr;
/* Length. */
- u32 len;
+ uint32_t len;
/* The flags as indicated above. */
- u16 flags;
+ uint16_t flags;
/* We chain unused descriptors via this, too */
- u16 next;
+ uint16_t next;
} __attribute__((packed));
+typedef struct VRingDesc VRingDesc;
-struct vring_avail {
- u16 flags;
- u16 idx;
- u16 ring[];
+struct VRingAvail {
+ uint16_t flags;
+ uint16_t idx;
+ uint16_t ring[];
} __attribute__((packed));
+typedef struct VRingAvail VRingAvail;
-/* u32 is used here for ids for padding reasons. */
-struct vring_used_elem {
+/* uint32_t is used here for ids for padding reasons. */
+struct VRingUsedElem {
/* Index of start of used descriptor chain. */
- u32 id;
+ uint32_t id;
/* Total length of the descriptor chain which was used (written to) */
- u32 len;
+ uint32_t len;
} __attribute__((packed));
+typedef struct VRingUsedElem VRingUsedElem;
-struct vring_used {
- u16 flags;
- u16 idx;
- struct vring_used_elem ring[];
+struct VRingUsed {
+ uint16_t flags;
+ uint16_t idx;
+ VRingUsedElem ring[];
} __attribute__((packed));
+typedef struct VRingUsed VRingUsed;
-struct vring {
+struct VRing {
unsigned int num;
int next_idx;
int used_idx;
- struct vring_desc *desc;
- struct vring_avail *avail;
- struct vring_used *used;
- struct subchannel_id schid;
+ VRingDesc *desc;
+ VRingAvail *avail;
+ VRingUsed *used;
+ SubChannelId schid;
+ long cookie;
+ int id;
};
+typedef struct VRing VRing;
/***********************************************
#define VIRTIO_BLK_T_BARRIER 0x80000000
/* This is the first element of the read scatter-gather list. */
-struct virtio_blk_outhdr {
+struct VirtioBlkOuthdr {
/* VIRTIO_BLK_T* */
- u32 type;
+ uint32_t type;
/* io priority. */
- u32 ioprio;
+ uint32_t ioprio;
/* Sector (ie. 512 byte offset) */
- u64 sector;
+ uint64_t sector;
+};
+typedef struct VirtioBlkOuthdr VirtioBlkOuthdr;
+
+struct VirtioBlkConfig {
+ uint64_t capacity; /* in 512-byte sectors */
+ uint32_t size_max; /* max segment size (if VIRTIO_BLK_F_SIZE_MAX) */
+ uint32_t seg_max; /* max number of segments (if VIRTIO_BLK_F_SEG_MAX) */
+
+ struct VirtioBlkGeometry {
+ uint16_t cylinders;
+ uint8_t heads;
+ uint8_t sectors;
+ } geometry; /* (if VIRTIO_BLK_F_GEOMETRY) */
+
+ uint32_t blk_size; /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
+
+ /* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY */
+ uint8_t physical_block_exp; /* exponent for physical blk per logical blk */
+ uint8_t alignment_offset; /* alignment offset in logical blocks */
+ uint16_t min_io_size; /* min I/O size without performance penalty
+ in logical blocks */
+ uint32_t opt_io_size; /* optimal sustained I/O size in logical blks */
+
+ uint8_t wce; /* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */
+} __attribute__((packed));
+typedef struct VirtioBlkConfig VirtioBlkConfig;
+
+enum guessed_disk_nature_type {
+ VIRTIO_GDN_NONE = 0,
+ VIRTIO_GDN_DASD = 1,
+ VIRTIO_GDN_CDROM = 2,
+ VIRTIO_GDN_SCSI = 3,
+};
+typedef enum guessed_disk_nature_type VirtioGDN;
+
+VirtioGDN virtio_guessed_disk_nature(void);
+void virtio_assume_scsi(void);
+void virtio_assume_eckd(void);
+void virtio_assume_iso9660(void);
+
+extern bool virtio_disk_is_scsi(void);
+extern bool virtio_disk_is_eckd(void);
+extern bool virtio_ipl_disk_is_valid(void);
+extern int virtio_get_block_size(void);
+extern uint8_t virtio_get_heads(void);
+extern uint8_t virtio_get_sectors(void);
+extern uint64_t virtio_get_blocks(void);
+extern int virtio_read_many(ulong sector, void *load_addr, int sec_num);
+
+#define VIRTIO_SECTOR_SIZE 512
+#define VIRTIO_ISO_BLOCK_SIZE 2048
+#define VIRTIO_SCSI_BLOCK_SIZE 512
+
+static inline ulong virtio_sector_adjust(ulong sector)
+{
+ return sector * (virtio_get_block_size() / VIRTIO_SECTOR_SIZE);
+}
+
+struct VirtioScsiConfig {
+ uint32_t num_queues;
+ uint32_t seg_max;
+ uint32_t max_sectors;
+ uint32_t cmd_per_lun;
+ uint32_t event_info_size;
+ uint32_t sense_size;
+ uint32_t cdb_size;
+ uint16_t max_channel;
+ uint16_t max_target;
+ uint32_t max_lun;
+} __attribute__((packed));
+typedef struct VirtioScsiConfig VirtioScsiConfig;
+
+struct ScsiDevice {
+ uint16_t channel; /* Always 0 in QEMU */
+ uint16_t target; /* will be scanned over */
+ uint32_t lun; /* will be reported */
+};
+typedef struct ScsiDevice ScsiDevice;
+
+struct VirtioNetConfig {
+ uint8_t mac[6];
+ /* uint16_t status; */ /* Only with VIRTIO_NET_F_STATUS */
+ /* uint16_t max_virtqueue_pairs; */ /* Only with VIRTIO_NET_F_MQ */
+};
+typedef struct VirtioNetConfig VirtioNetConfig;
+
+struct VDev {
+ int nr_vqs;
+ VRing *vrings;
+ int cmd_vr_idx;
+ void *ring_area;
+ long wait_reply_timeout;
+ VirtioGDN guessed_disk_nature;
+ SubChannelId schid;
+ SenseId senseid;
+ union {
+ VirtioBlkConfig blk;
+ VirtioScsiConfig scsi;
+ VirtioNetConfig net;
+ } config;
+ ScsiDevice *scsi_device;
+ bool is_cdrom;
+ int scsi_block_size;
+ int blk_factor;
+ uint64_t scsi_last_block;
+ uint32_t scsi_dev_cyls;
+ uint8_t scsi_dev_heads;
+ bool scsi_device_selected;
+ ScsiDevice selected_scsi_device;
+ uint64_t netboot_start_addr;
+ uint32_t max_transfer;
+ uint32_t guest_features[2];
+};
+typedef struct VDev VDev;
+
+VDev *virtio_get_device(void);
+VirtioDevType virtio_get_device_type(void);
+
+struct VirtioCmd {
+ void *data;
+ int size;
+ int flags;
};
+typedef struct VirtioCmd VirtioCmd;
+
+bool vring_notify(VRing *vr);
+int drain_irqs(SubChannelId schid);
+void vring_send_buf(VRing *vr, void *p, int len, int flags);
+int vr_poll(VRing *vr);
+int vring_wait_reply(void);
+int virtio_run(VDev *vdev, int vqid, VirtioCmd *cmd);
+void virtio_setup_ccw(VDev *vdev);
+
+int virtio_net_init(void *mac_addr);
#endif /* VIRTIO_H */
projects / qemu.git / blobdiff