Release 4.14 arch/sparc/include/asm/vio.h

/* SPDX-License-Identifier: GPL-2.0 */
#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

#define VDEV_CONSOLE_CON	0x05

	
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];
};


struct vio_net_dext {
	
u8		flags;

#define VNET_PKT_HASH			0x01

#define	VNET_PKT_HCK_IPV4_HDRCKSUM	0x02

#define	VNET_PKT_HCK_FULLCKSUM		0x04

#define	VNET_PKT_IPV4_LSO		0x08

#define	VNET_PKT_HCK_IPV4_HDRCKSUM_OK	0x10

#define	VNET_PKT_HCK_FULLCKSUM_OK	0x20

	
u8		vnet_hashval;
	
u16		ipv4_lso_mss;
	
u32		resv3;
};



static inline struct vio_net_dext *vio_net_ext(struct vio_net_desc *desc)
{
	return (struct vio_net_dext *)&desc->cookies[2];
}

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#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];
};


#define VIO_TAG_SIZE		((int)sizeof(struct vio_msg_tag))

#define VIO_VCC_MTU_SIZE	(LDC_PACKET_SIZE - VIO_TAG_SIZE)


struct vio_vcc {
	
struct vio_msg_tag	tag;
	
char			data[VIO_VCC_MTU_SIZE];
};



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

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

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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);
}

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static inline u32 vio_dring_next(struct vio_dring_state *dr, u32 index)
{
	if (++index == dr->num_entries)
		index = 0;
	return index;
}

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static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)
{
	if (index == 0)
		return dr->num_entries - 1;
	else
		return index - 1;
}

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#define VIO_MAX_TYPE_LEN	32

#define VIO_MAX_NAME_LEN	32

#define VIO_MAX_COMPAT_LEN	64


struct vio_dev {
	
u64			mp;
	
struct device_node	*dp;

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

	
u64			dev_no;

	
unsigned long		port_id;
	
unsigned long		channel_id;

	
unsigned int		tx_irq;
	
unsigned int		rx_irq;
	
u64			rx_ino;
	
u64			tx_ino;

	/* Handle to the root of "channel-devices" sub-tree in MDESC */
	
u64			cdev_handle;

	/* MD specific data used to identify the vdev in MD */
	
union md_node_info	md_node_info;

	
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;
	
bool				no_irq;
};


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;
}

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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;
}

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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;
}

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#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);
}

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

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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);
u64 vio_vdev_node(struct mdesc_handle *hp, struct vio_dev *vdev);

#endif /* _SPARC64_VIO_H */
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Directory: arch/sparc/include/asm

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