arch/sparc/include/asm/vio.h - kernel/msm-5.4 - Gitiles

 #ifndef _SPARC64_VIO_H
 #define _SPARC64_VIO_H

 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
 #include <linux/timer.h>
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/list.h>
 #include <linux/log2.h>

 #include <asm/ldc.h>
 #include <asm/mdesc.h>

 struct vio_msg_tag {
 	u8			type;
 #define VIO_TYPE_CTRL		0x01
 #define VIO_TYPE_DATA		0x02
 #define VIO_TYPE_ERR		0x04

 	u8			stype;
 #define VIO_SUBTYPE_INFO	0x01
 #define VIO_SUBTYPE_ACK		0x02
 #define VIO_SUBTYPE_NACK	0x04

 	u16			stype_env;
 #define VIO_VER_INFO		0x0001
 #define VIO_ATTR_INFO		0x0002
 #define VIO_DRING_REG		0x0003
 #define VIO_DRING_UNREG		0x0004
 #define VIO_RDX			0x0005
 #define VIO_PKT_DATA		0x0040
 #define VIO_DESC_DATA		0x0041
 #define VIO_DRING_DATA		0x0042
 #define VNET_MCAST_INFO		0x0101

 	u32		sid;
 };

 struct vio_rdx {
 	struct vio_msg_tag	tag;
 	u64			resv[6];
 };

 struct vio_ver_info {
 	struct vio_msg_tag	tag;
 	u16			major;
 	u16			minor;
 	u8			dev_class;
 #define VDEV_NETWORK		0x01
 #define VDEV_NETWORK_SWITCH	0x02
 #define VDEV_DISK		0x03
 #define VDEV_DISK_SERVER	0x04

 	u8			resv1[3];
 	u64			resv2[5];
 };

 struct vio_dring_register {
 	struct vio_msg_tag	tag;
 	u64			dring_ident;
 	u32			num_descr;
 	u32			descr_size;
 	u16			options;
 #define VIO_TX_DRING		0x0001
 #define VIO_RX_DRING		0x0002
 #define VIO_RX_DRING_DATA	0x0004
 	u16			resv;
 	u32			num_cookies;
 	struct ldc_trans_cookie	cookies[0];
 };

 struct vio_dring_unregister {
 	struct vio_msg_tag	tag;
 	u64			dring_ident;
 	u64			resv[5];
 };

 /* Data transfer modes */
 #define VIO_PKT_MODE		0x01 /* Packet based transfer	*/
 #define VIO_DESC_MODE		0x02 /* In-band descriptors	*/
 #define VIO_DRING_MODE		0x03 /* Descriptor rings	*/
 /* in vers >= 1.2, VIO_DRING_MODE is 0x04 and transfer mode is a bitmask */
 #define VIO_NEW_DRING_MODE	0x04

 struct vio_dring_data {
 	struct vio_msg_tag	tag;
 	u64			seq;
 	u64			dring_ident;
 	u32			start_idx;
 	u32			end_idx;
 	u8			state;
 #define VIO_DRING_ACTIVE	0x01
 #define VIO_DRING_STOPPED	0x02

 	u8			__pad1;
 	u16			__pad2;
 	u32			__pad3;
 	u64			__par4[2];
 };

 struct vio_dring_hdr {
 	u8			state;
 #define VIO_DESC_FREE		0x01
 #define VIO_DESC_READY		0x02
 #define VIO_DESC_ACCEPTED	0x03
 #define VIO_DESC_DONE		0x04
 	u8			ack;
 #define VIO_ACK_ENABLE		0x01
 #define VIO_ACK_DISABLE		0x00

 	u16			__pad1;
 	u32			__pad2;
 };

 /* VIO disk specific structures and defines */
 struct vio_disk_attr_info {
 	struct vio_msg_tag	tag;
 	u8			xfer_mode;
 	u8			vdisk_type;
 #define VD_DISK_TYPE_SLICE	0x01 /* Slice in block device	*/
 #define VD_DISK_TYPE_DISK	0x02 /* Entire block device	*/
 	u8			vdisk_mtype;		/* v1.1 */
 #define VD_MEDIA_TYPE_FIXED	0x01 /* Fixed device */
 #define VD_MEDIA_TYPE_CD	0x02 /* CD Device    */
 #define VD_MEDIA_TYPE_DVD	0x03 /* DVD Device   */
 	u8			resv1;
 	u32			vdisk_block_size;
 	u64			operations;
 	u64			vdisk_size;		/* v1.1 */
 	u64			max_xfer_size;
 	u32			phys_block_size;	/* v1.2 */
 	u32			resv2;
 	u64			resv3[1];
 };

 struct vio_disk_desc {
 	struct vio_dring_hdr	hdr;
 	u64			req_id;
 	u8			operation;
 #define VD_OP_BREAD		0x01 /* Block read			*/
 #define VD_OP_BWRITE		0x02 /* Block write			*/
 #define VD_OP_FLUSH		0x03 /* Flush disk contents		*/
 #define VD_OP_GET_WCE		0x04 /* Get write-cache status		*/
 #define VD_OP_SET_WCE		0x05 /* Enable/disable write-cache	*/
 #define VD_OP_GET_VTOC		0x06 /* Get VTOC			*/
 #define VD_OP_SET_VTOC		0x07 /* Set VTOC			*/
 #define VD_OP_GET_DISKGEOM	0x08 /* Get disk geometry		*/
 #define VD_OP_SET_DISKGEOM	0x09 /* Set disk geometry		*/
 #define VD_OP_SCSICMD		0x0a /* SCSI control command		*/
 #define VD_OP_GET_DEVID		0x0b /* Get device ID			*/
 #define VD_OP_GET_EFI		0x0c /* Get EFI				*/
 #define VD_OP_SET_EFI		0x0d /* Set EFI				*/
 	u8			slice;
 	u16			resv1;
 	u32			status;
 	u64			offset;
 	u64			size;
 	u32			ncookies;
 	u32			resv2;
 	struct ldc_trans_cookie	cookies[0];
 };

 #define VIO_DISK_VNAME_LEN	8
 #define VIO_DISK_ALABEL_LEN	128
 #define VIO_DISK_NUM_PART	8

 struct vio_disk_vtoc {
 	u8			volume_name[VIO_DISK_VNAME_LEN];
 	u16			sector_size;
 	u16			num_partitions;
 	u8			ascii_label[VIO_DISK_ALABEL_LEN];
 	struct {
 		u16		id;
 		u16		perm_flags;
 		u32		resv;
 		u64		start_block;
 		u64		num_blocks;
 	} partitions[VIO_DISK_NUM_PART];
 };

 struct vio_disk_geom {
 	u16			num_cyl; /* Num data cylinders		*/
 	u16			alt_cyl; /* Num alternate cylinders	*/
 	u16			beg_cyl; /* Cyl off of fixed head area	*/
 	u16			num_hd;  /* Num heads			*/
 	u16			num_sec; /* Num sectors			*/
 	u16			ifact;   /* Interleave factor		*/
 	u16			apc;     /* Alts per cylinder (SCSI)	*/
 	u16			rpm;	 /* Revolutions per minute	*/
 	u16			phy_cyl; /* Num physical cylinders	*/
 	u16			wr_skip; /* Num sects to skip, writes	*/
 	u16			rd_skip; /* Num sects to skip, writes	*/
 };

 struct vio_disk_devid {
 	u16			resv;
 	u16			type;
 	u32			len;
 	char			id[0];
 };

 struct vio_disk_efi {
 	u64			lba;
 	u64			len;
 	char			data[0];
 };

 /* VIO net specific structures and defines */
 struct vio_net_attr_info {
 	struct vio_msg_tag	tag;
 	u8			xfer_mode;
 	u8			addr_type;
 #define VNET_ADDR_ETHERMAC	0x01
 	u16			ack_freq;
 	u8			plnk_updt;
 #define PHYSLINK_UPDATE_NONE		0x00
 #define PHYSLINK_UPDATE_STATE		0x01
 #define PHYSLINK_UPDATE_STATE_ACK	0x02
 #define PHYSLINK_UPDATE_STATE_NACK	0x03
 	u8			options;
 	u16			resv1;
 	u64			addr;
 	u64			mtu;
 	u16			cflags;
 #define VNET_LSO_IPV4_CAPAB		0x0001
 	u16			ipv4_lso_maxlen;
 	u32			resv2;
 	u64			resv3[2];
 };

 #define VNET_NUM_MCAST		7

 struct vio_net_mcast_info {
 	struct vio_msg_tag	tag;
 	u8			set;
 	u8			count;
 	u8			mcast_addr[VNET_NUM_MCAST * 6];
 	u32			resv;
 };

 struct vio_net_desc {
 	struct vio_dring_hdr	hdr;
 	u32			size;
 	u32			ncookies;
 	struct ldc_trans_cookie	cookies[0];
 };

 #define VIO_MAX_RING_COOKIES	24

 struct vio_dring_state {
 	u64			ident;
 	void			*base;
 	u64			snd_nxt;
 	u64			rcv_nxt;
 	u32			entry_size;
 	u32			num_entries;
 	u32			prod;
 	u32			cons;
 	u32			pending;
 	int			ncookies;
 	struct ldc_trans_cookie	cookies[VIO_MAX_RING_COOKIES];
 };

 static inline void *vio_dring_cur(struct vio_dring_state *dr)
 {
 	return dr->base + (dr->entry_size * dr->prod);
 }

 static inline void *vio_dring_entry(struct vio_dring_state *dr,
 				    unsigned int index)
 {
 	return dr->base + (dr->entry_size * index);
 }

 static inline u32 vio_dring_avail(struct vio_dring_state *dr,
 				  unsigned int ring_size)
 {
 	return (dr->pending -
 		((dr->prod - dr->cons) & (ring_size - 1)) - 1);
 }

 #define VIO_MAX_TYPE_LEN	32
 #define VIO_MAX_COMPAT_LEN	64

 struct vio_dev {
 	u64			mp;
 	struct device_node	*dp;

 	char			type[VIO_MAX_TYPE_LEN];
 	char			compat[VIO_MAX_COMPAT_LEN];
 	int			compat_len;

 	u64			dev_no;

 	unsigned long		channel_id;

 	unsigned int		tx_irq;
 	unsigned int		rx_irq;
 	u64			rx_ino;

 	struct device		dev;
 };

 struct vio_driver {
 	const char			*name;
 	struct list_head		node;
 	const struct vio_device_id	*id_table;
 	int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
 	int (*remove)(struct vio_dev *dev);
 	void (*shutdown)(struct vio_dev *dev);
 	unsigned long			driver_data;
 	struct device_driver		driver;
 };

 struct vio_version {
 	u16		major;
 	u16		minor;
 };

 struct vio_driver_state;
 struct vio_driver_ops {
 	int	(*send_attr)(struct vio_driver_state *vio);
 	int	(*handle_attr)(struct vio_driver_state *vio, void *pkt);
 	void	(*handshake_complete)(struct vio_driver_state *vio);
 };

 struct vio_completion {
 	struct completion	com;
 	int			err;
 	int			waiting_for;
 };

 struct vio_driver_state {
 	/* Protects VIO handshake and, optionally, driver private state.  */
 	spinlock_t		lock;

 	struct ldc_channel	*lp;

 	u32			_peer_sid;
 	u32			_local_sid;
 	struct vio_dring_state	drings[2];
 #define VIO_DRIVER_TX_RING	0
 #define VIO_DRIVER_RX_RING	1

 	u8			hs_state;
 #define VIO_HS_INVALID		0x00
 #define VIO_HS_GOTVERS		0x01
 #define VIO_HS_GOT_ATTR		0x04
 #define VIO_HS_SENT_DREG	0x08
 #define VIO_HS_SENT_RDX		0x10
 #define VIO_HS_GOT_RDX_ACK	0x20
 #define VIO_HS_GOT_RDX		0x40
 #define VIO_HS_SENT_RDX_ACK	0x80
 #define VIO_HS_COMPLETE		(VIO_HS_GOT_RDX_ACK | VIO_HS_SENT_RDX_ACK)

 	u8			dev_class;

 	u8			dr_state;
 #define VIO_DR_STATE_TXREG	0x01
 #define VIO_DR_STATE_RXREG	0x02
 #define VIO_DR_STATE_TXREQ	0x10
 #define VIO_DR_STATE_RXREQ	0x20

 	u8			debug;
 #define VIO_DEBUG_HS		0x01
 #define VIO_DEBUG_DATA		0x02

 	void			*desc_buf;
 	unsigned int		desc_buf_len;

 	struct vio_completion	*cmp;

 	struct vio_dev		*vdev;

 	struct timer_list	timer;

 	struct vio_version	ver;

 	struct vio_version	*ver_table;
 	int			ver_table_entries;

 	char			*name;

 	struct vio_driver_ops	*ops;
 };

 static inline bool vio_version_before(struct vio_driver_state *vio,
 				      u16 major, u16 minor)
 {
 	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
 	u32 want = (u32)major << 16 | minor;

 	return have < want;
 }

 static inline bool vio_version_after(struct vio_driver_state *vio,
 				      u16 major, u16 minor)
 {
 	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
 	u32 want = (u32)major << 16 | minor;

 	return have > want;
 }

 static inline bool vio_version_after_eq(struct vio_driver_state *vio,
 					u16 major, u16 minor)
 {
 	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
 	u32 want = (u32)major << 16 | minor;

 	return have >= want;
 }

 #define viodbg(TYPE, f, a...) \
 do {	if (vio->debug & VIO_DEBUG_##TYPE) \
 		printk(KERN_INFO "vio: ID[%lu] " f, \
 		       vio->vdev->channel_id, ## a); \
 } while (0)

 int __vio_register_driver(struct vio_driver *drv, struct module *owner,
 				 const char *mod_name);
 /*
  * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
  */
 #define vio_register_driver(driver)		\
 	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 void vio_unregister_driver(struct vio_driver *drv);

 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
 {
 	return container_of(drv, struct vio_driver, driver);
 }

 static inline struct vio_dev *to_vio_dev(struct device *dev)
 {
 	return container_of(dev, struct vio_dev, dev);
 }

 int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
 void vio_link_state_change(struct vio_driver_state *vio, int event);
 void vio_conn_reset(struct vio_driver_state *vio);
 int vio_control_pkt_engine(struct vio_driver_state *vio, void *pkt);
 int vio_validate_sid(struct vio_driver_state *vio,
 		     struct vio_msg_tag *tp);
 u32 vio_send_sid(struct vio_driver_state *vio);
 int vio_ldc_alloc(struct vio_driver_state *vio,
 		  struct ldc_channel_config *base_cfg, void *event_arg);
 void vio_ldc_free(struct vio_driver_state *vio);
 int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
 		    u8 dev_class, struct vio_version *ver_table,
 		    int ver_table_size, struct vio_driver_ops *ops,
 		    char *name);

 void vio_port_up(struct vio_driver_state *vio);
 int vio_set_intr(unsigned long dev_ino, int state);

 #endif /* _SPARC64_VIO_H */
	#ifndef _SPARC64_VIO_H
	#define _SPARC64_VIO_H

	#include <linux/kernel.h>
	#include <linux/device.h>
	#include <linux/mod_devicetable.h>
	#include <linux/timer.h>
	#include <linux/spinlock.h>
	#include <linux/completion.h>
	#include <linux/list.h>
	#include <linux/log2.h>

	#include <asm/ldc.h>
	#include <asm/mdesc.h>

	struct vio_msg_tag {
	u8 type;
	#define VIO_TYPE_CTRL 0x01
	#define VIO_TYPE_DATA 0x02
	#define VIO_TYPE_ERR 0x04

	u8 stype;
	#define VIO_SUBTYPE_INFO 0x01
	#define VIO_SUBTYPE_ACK 0x02
	#define VIO_SUBTYPE_NACK 0x04

	u16 stype_env;
	#define VIO_VER_INFO 0x0001
	#define VIO_ATTR_INFO 0x0002
	#define VIO_DRING_REG 0x0003
	#define VIO_DRING_UNREG 0x0004
	#define VIO_RDX 0x0005
	#define VIO_PKT_DATA 0x0040
	#define VIO_DESC_DATA 0x0041
	#define VIO_DRING_DATA 0x0042
	#define VNET_MCAST_INFO 0x0101

	u32 sid;
	};

	struct vio_rdx {
	struct vio_msg_tag tag;
	u64 resv[6];
	};

	struct vio_ver_info {
	struct vio_msg_tag tag;
	u16 major;
	u16 minor;
	u8 dev_class;
	#define VDEV_NETWORK 0x01
	#define VDEV_NETWORK_SWITCH 0x02
	#define VDEV_DISK 0x03
	#define VDEV_DISK_SERVER 0x04

	u8 resv1[3];
	u64 resv2[5];
	};

	struct vio_dring_register {
	struct vio_msg_tag tag;
	u64 dring_ident;
	u32 num_descr;
	u32 descr_size;
	u16 options;
	#define VIO_TX_DRING 0x0001
	#define VIO_RX_DRING 0x0002
	#define VIO_RX_DRING_DATA 0x0004
	u16 resv;
	u32 num_cookies;
	struct ldc_trans_cookie cookies[0];
	};

	struct vio_dring_unregister {
	struct vio_msg_tag tag;
	u64 dring_ident;
	u64 resv[5];
	};

	/* Data transfer modes */
	#define VIO_PKT_MODE 0x01 /* Packet based transfer */
	#define VIO_DESC_MODE 0x02 /* In-band descriptors */
	#define VIO_DRING_MODE 0x03 /* Descriptor rings */
	/* in vers >= 1.2, VIO_DRING_MODE is 0x04 and transfer mode is a bitmask */
	#define VIO_NEW_DRING_MODE 0x04

	struct vio_dring_data {
	struct vio_msg_tag tag;
	u64 seq;
	u64 dring_ident;
	u32 start_idx;
	u32 end_idx;
	u8 state;
	#define VIO_DRING_ACTIVE 0x01
	#define VIO_DRING_STOPPED 0x02

	u8 __pad1;
	u16 __pad2;
	u32 __pad3;
	u64 __par4[2];
	};

	struct vio_dring_hdr {
	u8 state;
	#define VIO_DESC_FREE 0x01
	#define VIO_DESC_READY 0x02
	#define VIO_DESC_ACCEPTED 0x03
	#define VIO_DESC_DONE 0x04
	u8 ack;
	#define VIO_ACK_ENABLE 0x01
	#define VIO_ACK_DISABLE 0x00

	u16 __pad1;
	u32 __pad2;
	};

	/* VIO disk specific structures and defines */
	struct vio_disk_attr_info {
	struct vio_msg_tag tag;
	u8 xfer_mode;
	u8 vdisk_type;
	#define VD_DISK_TYPE_SLICE 0x01 /* Slice in block device */
	#define VD_DISK_TYPE_DISK 0x02 /* Entire block device */
	u8 vdisk_mtype; /* v1.1 */
	#define VD_MEDIA_TYPE_FIXED 0x01 /* Fixed device */
	#define VD_MEDIA_TYPE_CD 0x02 /* CD Device */
	#define VD_MEDIA_TYPE_DVD 0x03 /* DVD Device */
	u8 resv1;
	u32 vdisk_block_size;
	u64 operations;
	u64 vdisk_size; /* v1.1 */
	u64 max_xfer_size;
	u32 phys_block_size; /* v1.2 */
	u32 resv2;
	u64 resv3[1];
	};

	struct vio_disk_desc {
	struct vio_dring_hdr hdr;
	u64 req_id;
	u8 operation;
	#define VD_OP_BREAD 0x01 /* Block read */
	#define VD_OP_BWRITE 0x02 /* Block write */
	#define VD_OP_FLUSH 0x03 /* Flush disk contents */
	#define VD_OP_GET_WCE 0x04 /* Get write-cache status */
	#define VD_OP_SET_WCE 0x05 /* Enable/disable write-cache */
	#define VD_OP_GET_VTOC 0x06 /* Get VTOC */
	#define VD_OP_SET_VTOC 0x07 /* Set VTOC */
	#define VD_OP_GET_DISKGEOM 0x08 /* Get disk geometry */
	#define VD_OP_SET_DISKGEOM 0x09 /* Set disk geometry */
	#define VD_OP_SCSICMD 0x0a /* SCSI control command */
	#define VD_OP_GET_DEVID 0x0b /* Get device ID */
	#define VD_OP_GET_EFI 0x0c /* Get EFI */
	#define VD_OP_SET_EFI 0x0d /* Set EFI */
	u8 slice;
	u16 resv1;
	u32 status;
	u64 offset;
	u64 size;
	u32 ncookies;
	u32 resv2;
	struct ldc_trans_cookie cookies[0];
	};

	#define VIO_DISK_VNAME_LEN 8
	#define VIO_DISK_ALABEL_LEN 128
	#define VIO_DISK_NUM_PART 8

	struct vio_disk_vtoc {
	u8 volume_name[VIO_DISK_VNAME_LEN];
	u16 sector_size;
	u16 num_partitions;
	u8 ascii_label[VIO_DISK_ALABEL_LEN];
	struct {
	u16 id;
	u16 perm_flags;
	u32 resv;
	u64 start_block;
	u64 num_blocks;
	} partitions[VIO_DISK_NUM_PART];
	};

	struct vio_disk_geom {
	u16 num_cyl; /* Num data cylinders */
	u16 alt_cyl; /* Num alternate cylinders */
	u16 beg_cyl; /* Cyl off of fixed head area */
	u16 num_hd; /* Num heads */
	u16 num_sec; /* Num sectors */
	u16 ifact; /* Interleave factor */
	u16 apc; /* Alts per cylinder (SCSI) */
	u16 rpm; /* Revolutions per minute */
	u16 phy_cyl; /* Num physical cylinders */
	u16 wr_skip; /* Num sects to skip, writes */
	u16 rd_skip; /* Num sects to skip, writes */
	};

	struct vio_disk_devid {
	u16 resv;
	u16 type;
	u32 len;
	char id[0];
	};

	struct vio_disk_efi {
	u64 lba;
	u64 len;
	char data[0];
	};

	/* VIO net specific structures and defines */
	struct vio_net_attr_info {
	struct vio_msg_tag tag;
	u8 xfer_mode;
	u8 addr_type;
	#define VNET_ADDR_ETHERMAC 0x01
	u16 ack_freq;
	u8 plnk_updt;
	#define PHYSLINK_UPDATE_NONE 0x00
	#define PHYSLINK_UPDATE_STATE 0x01
	#define PHYSLINK_UPDATE_STATE_ACK 0x02
	#define PHYSLINK_UPDATE_STATE_NACK 0x03
	u8 options;
	u16 resv1;
	u64 addr;
	u64 mtu;
	u16 cflags;
	#define VNET_LSO_IPV4_CAPAB 0x0001
	u16 ipv4_lso_maxlen;
	u32 resv2;
	u64 resv3[2];
	};

	#define VNET_NUM_MCAST 7

	struct vio_net_mcast_info {
	struct vio_msg_tag tag;
	u8 set;
	u8 count;
	u8 mcast_addr[VNET_NUM_MCAST * 6];
	u32 resv;
	};

	struct vio_net_desc {
	struct vio_dring_hdr hdr;
	u32 size;
	u32 ncookies;
	struct ldc_trans_cookie cookies[0];
	};

	#define VIO_MAX_RING_COOKIES 24

	struct vio_dring_state {
	u64 ident;
	void *base;
	u64 snd_nxt;
	u64 rcv_nxt;
	u32 entry_size;
	u32 num_entries;
	u32 prod;
	u32 cons;
	u32 pending;
	int ncookies;
	struct ldc_trans_cookie cookies[VIO_MAX_RING_COOKIES];
	};

	static inline void vio_dring_cur(struct vio_dring_state dr)
	{
	return dr->base + (dr->entry_size * dr->prod);
	}

	static inline void vio_dring_entry(struct vio_dring_state dr,
	unsigned int index)
	{
	return dr->base + (dr->entry_size * index);
	}

	static inline u32 vio_dring_avail(struct vio_dring_state *dr,
	unsigned int ring_size)
	{
	return (dr->pending -
	((dr->prod - dr->cons) & (ring_size - 1)) - 1);
	}

	#define VIO_MAX_TYPE_LEN 32
	#define VIO_MAX_COMPAT_LEN 64

	struct vio_dev {
	u64 mp;
	struct device_node *dp;

	char type[VIO_MAX_TYPE_LEN];
	char compat[VIO_MAX_COMPAT_LEN];
	int compat_len;

	u64 dev_no;

	unsigned long channel_id;

	unsigned int tx_irq;
	unsigned int rx_irq;
	u64 rx_ino;

	struct device dev;
	};

	struct vio_driver {
	const char *name;
	struct list_head node;
	const struct vio_device_id *id_table;
	int (probe)(struct vio_dev dev, const struct vio_device_id *id);
	int (remove)(struct vio_dev dev);
	void (shutdown)(struct vio_dev dev);
	unsigned long driver_data;
	struct device_driver driver;
	};

	struct vio_version {
	u16 major;
	u16 minor;
	};

	struct vio_driver_state;
	struct vio_driver_ops {
	int (send_attr)(struct vio_driver_state vio);
	int (handle_attr)(struct vio_driver_state vio, void *pkt);
	void (handshake_complete)(struct vio_driver_state vio);
	};

	struct vio_completion {
	struct completion com;
	int err;
	int waiting_for;
	};

	struct vio_driver_state {
	/* Protects VIO handshake and, optionally, driver private state. */
	spinlock_t lock;

	struct ldc_channel *lp;

	u32 _peer_sid;
	u32 _local_sid;
	struct vio_dring_state drings[2];
	#define VIO_DRIVER_TX_RING 0
	#define VIO_DRIVER_RX_RING 1

	u8 hs_state;
	#define VIO_HS_INVALID 0x00
	#define VIO_HS_GOTVERS 0x01
	#define VIO_HS_GOT_ATTR 0x04
	#define VIO_HS_SENT_DREG 0x08
	#define VIO_HS_SENT_RDX 0x10
	#define VIO_HS_GOT_RDX_ACK 0x20
	#define VIO_HS_GOT_RDX 0x40
	#define VIO_HS_SENT_RDX_ACK 0x80
	#define VIO_HS_COMPLETE (VIO_HS_GOT_RDX_ACK \| VIO_HS_SENT_RDX_ACK)

	u8 dev_class;

	u8 dr_state;
	#define VIO_DR_STATE_TXREG 0x01
	#define VIO_DR_STATE_RXREG 0x02
	#define VIO_DR_STATE_TXREQ 0x10
	#define VIO_DR_STATE_RXREQ 0x20

	u8 debug;
	#define VIO_DEBUG_HS 0x01
	#define VIO_DEBUG_DATA 0x02

	void *desc_buf;
	unsigned int desc_buf_len;

	struct vio_completion *cmp;

	struct vio_dev *vdev;

	struct timer_list timer;

	struct vio_version ver;

	struct vio_version *ver_table;
	int ver_table_entries;

	char *name;

	struct vio_driver_ops *ops;
	};

	static inline bool vio_version_before(struct vio_driver_state *vio,
	u16 major, u16 minor)
	{
	u32 have = (u32)vio->ver.major << 16 \| vio->ver.minor;
	u32 want = (u32)major << 16 \| minor;

	return have < want;
	}

	static inline bool vio_version_after(struct vio_driver_state *vio,
	u16 major, u16 minor)
	{
	u32 have = (u32)vio->ver.major << 16 \| vio->ver.minor;
	u32 want = (u32)major << 16 \| minor;

	return have > want;
	}

	static inline bool vio_version_after_eq(struct vio_driver_state *vio,
	u16 major, u16 minor)
	{
	u32 have = (u32)vio->ver.major << 16 \| vio->ver.minor;
	u32 want = (u32)major << 16 \| minor;

	return have >= want;
	}

	#define viodbg(TYPE, f, a...) \
	do { if (vio->debug & VIO_DEBUG_##TYPE) \
	printk(KERN_INFO "vio: ID[%lu] " f, \
	vio->vdev->channel_id, ## a); \
	} while (0)

	int __vio_register_driver(struct vio_driver drv, struct module owner,
	const char *mod_name);
	/*
	* vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
	*/
	#define vio_register_driver(driver) \
	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
	void vio_unregister_driver(struct vio_driver *drv);

	static inline struct vio_driver to_vio_driver(struct device_driver drv)
	{
	return container_of(drv, struct vio_driver, driver);
	}

	static inline struct vio_dev to_vio_dev(struct device dev)
	{
	return container_of(dev, struct vio_dev, dev);
	}

	int vio_ldc_send(struct vio_driver_state vio, void data, int len);
	void vio_link_state_change(struct vio_driver_state *vio, int event);
	void vio_conn_reset(struct vio_driver_state *vio);
	int vio_control_pkt_engine(struct vio_driver_state vio, void pkt);
	int vio_validate_sid(struct vio_driver_state *vio,
	struct vio_msg_tag *tp);
	u32 vio_send_sid(struct vio_driver_state *vio);
	int vio_ldc_alloc(struct vio_driver_state *vio,
	struct ldc_channel_config base_cfg, void event_arg);
	void vio_ldc_free(struct vio_driver_state *vio);
	int vio_driver_init(struct vio_driver_state vio, struct vio_dev vdev,
	u8 dev_class, struct vio_version *ver_table,
	int ver_table_size, struct vio_driver_ops *ops,
	char *name);

	void vio_port_up(struct vio_driver_state *vio);
	int vio_set_intr(unsigned long dev_ino, int state);

	#endif /* _SPARC64_VIO_H */