516 lines
12 KiB
C
516 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SPARC64_VIO_H
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#define _SPARC64_VIO_H
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#include <linux/timer.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/list.h>
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#include <linux/log2.h>
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#include <asm/ldc.h>
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#include <asm/mdesc.h>
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struct vio_msg_tag {
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u8 type;
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#define VIO_TYPE_CTRL 0x01
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#define VIO_TYPE_DATA 0x02
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#define VIO_TYPE_ERR 0x04
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u8 stype;
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#define VIO_SUBTYPE_INFO 0x01
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#define VIO_SUBTYPE_ACK 0x02
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#define VIO_SUBTYPE_NACK 0x04
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u16 stype_env;
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#define VIO_VER_INFO 0x0001
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#define VIO_ATTR_INFO 0x0002
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#define VIO_DRING_REG 0x0003
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#define VIO_DRING_UNREG 0x0004
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#define VIO_RDX 0x0005
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#define VIO_PKT_DATA 0x0040
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#define VIO_DESC_DATA 0x0041
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#define VIO_DRING_DATA 0x0042
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#define VNET_MCAST_INFO 0x0101
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u32 sid;
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};
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struct vio_rdx {
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struct vio_msg_tag tag;
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u64 resv[6];
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};
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struct vio_ver_info {
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struct vio_msg_tag tag;
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u16 major;
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u16 minor;
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u8 dev_class;
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#define VDEV_NETWORK 0x01
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#define VDEV_NETWORK_SWITCH 0x02
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#define VDEV_DISK 0x03
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#define VDEV_DISK_SERVER 0x04
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#define VDEV_CONSOLE_CON 0x05
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u8 resv1[3];
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u64 resv2[5];
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};
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struct vio_dring_register {
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struct vio_msg_tag tag;
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u64 dring_ident;
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u32 num_descr;
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u32 descr_size;
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u16 options;
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#define VIO_TX_DRING 0x0001
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#define VIO_RX_DRING 0x0002
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#define VIO_RX_DRING_DATA 0x0004
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u16 resv;
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u32 num_cookies;
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struct ldc_trans_cookie cookies[0];
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};
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struct vio_dring_unregister {
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struct vio_msg_tag tag;
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u64 dring_ident;
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u64 resv[5];
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};
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/* Data transfer modes */
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#define VIO_PKT_MODE 0x01 /* Packet based transfer */
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#define VIO_DESC_MODE 0x02 /* In-band descriptors */
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#define VIO_DRING_MODE 0x03 /* Descriptor rings */
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/* in vers >= 1.2, VIO_DRING_MODE is 0x04 and transfer mode is a bitmask */
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#define VIO_NEW_DRING_MODE 0x04
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struct vio_dring_data {
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struct vio_msg_tag tag;
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u64 seq;
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u64 dring_ident;
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u32 start_idx;
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u32 end_idx;
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u8 state;
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#define VIO_DRING_ACTIVE 0x01
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#define VIO_DRING_STOPPED 0x02
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u8 __pad1;
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u16 __pad2;
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u32 __pad3;
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u64 __par4[2];
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};
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struct vio_dring_hdr {
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u8 state;
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#define VIO_DESC_FREE 0x01
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#define VIO_DESC_READY 0x02
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#define VIO_DESC_ACCEPTED 0x03
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#define VIO_DESC_DONE 0x04
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u8 ack;
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#define VIO_ACK_ENABLE 0x01
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#define VIO_ACK_DISABLE 0x00
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u16 __pad1;
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u32 __pad2;
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};
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/* VIO disk specific structures and defines */
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struct vio_disk_attr_info {
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struct vio_msg_tag tag;
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u8 xfer_mode;
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u8 vdisk_type;
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#define VD_DISK_TYPE_SLICE 0x01 /* Slice in block device */
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#define VD_DISK_TYPE_DISK 0x02 /* Entire block device */
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u8 vdisk_mtype; /* v1.1 */
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#define VD_MEDIA_TYPE_FIXED 0x01 /* Fixed device */
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#define VD_MEDIA_TYPE_CD 0x02 /* CD Device */
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#define VD_MEDIA_TYPE_DVD 0x03 /* DVD Device */
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u8 resv1;
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u32 vdisk_block_size;
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u64 operations;
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u64 vdisk_size; /* v1.1 */
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u64 max_xfer_size;
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u32 phys_block_size; /* v1.2 */
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u32 resv2;
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u64 resv3[1];
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};
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struct vio_disk_desc {
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struct vio_dring_hdr hdr;
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u64 req_id;
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u8 operation;
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#define VD_OP_BREAD 0x01 /* Block read */
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#define VD_OP_BWRITE 0x02 /* Block write */
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#define VD_OP_FLUSH 0x03 /* Flush disk contents */
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#define VD_OP_GET_WCE 0x04 /* Get write-cache status */
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#define VD_OP_SET_WCE 0x05 /* Enable/disable write-cache */
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#define VD_OP_GET_VTOC 0x06 /* Get VTOC */
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#define VD_OP_SET_VTOC 0x07 /* Set VTOC */
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#define VD_OP_GET_DISKGEOM 0x08 /* Get disk geometry */
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#define VD_OP_SET_DISKGEOM 0x09 /* Set disk geometry */
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#define VD_OP_SCSICMD 0x0a /* SCSI control command */
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#define VD_OP_GET_DEVID 0x0b /* Get device ID */
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#define VD_OP_GET_EFI 0x0c /* Get EFI */
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#define VD_OP_SET_EFI 0x0d /* Set EFI */
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u8 slice;
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u16 resv1;
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u32 status;
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u64 offset;
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u64 size;
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u32 ncookies;
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u32 resv2;
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struct ldc_trans_cookie cookies[0];
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};
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#define VIO_DISK_VNAME_LEN 8
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#define VIO_DISK_ALABEL_LEN 128
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#define VIO_DISK_NUM_PART 8
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struct vio_disk_vtoc {
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u8 volume_name[VIO_DISK_VNAME_LEN];
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u16 sector_size;
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u16 num_partitions;
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u8 ascii_label[VIO_DISK_ALABEL_LEN];
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struct {
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u16 id;
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u16 perm_flags;
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u32 resv;
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u64 start_block;
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u64 num_blocks;
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} partitions[VIO_DISK_NUM_PART];
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};
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struct vio_disk_geom {
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u16 num_cyl; /* Num data cylinders */
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u16 alt_cyl; /* Num alternate cylinders */
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u16 beg_cyl; /* Cyl off of fixed head area */
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u16 num_hd; /* Num heads */
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u16 num_sec; /* Num sectors */
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u16 ifact; /* Interleave factor */
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u16 apc; /* Alts per cylinder (SCSI) */
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u16 rpm; /* Revolutions per minute */
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u16 phy_cyl; /* Num physical cylinders */
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u16 wr_skip; /* Num sects to skip, writes */
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u16 rd_skip; /* Num sects to skip, writes */
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};
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struct vio_disk_devid {
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u16 resv;
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u16 type;
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u32 len;
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char id[0];
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};
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struct vio_disk_efi {
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u64 lba;
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u64 len;
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char data[0];
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};
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/* VIO net specific structures and defines */
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struct vio_net_attr_info {
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struct vio_msg_tag tag;
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u8 xfer_mode;
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u8 addr_type;
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#define VNET_ADDR_ETHERMAC 0x01
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u16 ack_freq;
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u8 plnk_updt;
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#define PHYSLINK_UPDATE_NONE 0x00
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#define PHYSLINK_UPDATE_STATE 0x01
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#define PHYSLINK_UPDATE_STATE_ACK 0x02
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#define PHYSLINK_UPDATE_STATE_NACK 0x03
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u8 options;
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u16 resv1;
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u64 addr;
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u64 mtu;
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u16 cflags;
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#define VNET_LSO_IPV4_CAPAB 0x0001
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u16 ipv4_lso_maxlen;
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u32 resv2;
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u64 resv3[2];
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};
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#define VNET_NUM_MCAST 7
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struct vio_net_mcast_info {
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struct vio_msg_tag tag;
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u8 set;
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u8 count;
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u8 mcast_addr[VNET_NUM_MCAST * 6];
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u32 resv;
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};
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struct vio_net_desc {
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struct vio_dring_hdr hdr;
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u32 size;
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u32 ncookies;
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struct ldc_trans_cookie cookies[0];
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};
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struct vio_net_dext {
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u8 flags;
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#define VNET_PKT_HASH 0x01
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#define VNET_PKT_HCK_IPV4_HDRCKSUM 0x02
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#define VNET_PKT_HCK_FULLCKSUM 0x04
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#define VNET_PKT_IPV4_LSO 0x08
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#define VNET_PKT_HCK_IPV4_HDRCKSUM_OK 0x10
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#define VNET_PKT_HCK_FULLCKSUM_OK 0x20
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u8 vnet_hashval;
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u16 ipv4_lso_mss;
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u32 resv3;
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};
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static inline struct vio_net_dext *vio_net_ext(struct vio_net_desc *desc)
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{
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return (struct vio_net_dext *)&desc->cookies[2];
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}
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#define VIO_MAX_RING_COOKIES 24
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struct vio_dring_state {
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u64 ident;
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void *base;
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u64 snd_nxt;
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u64 rcv_nxt;
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u32 entry_size;
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u32 num_entries;
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u32 prod;
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u32 cons;
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u32 pending;
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int ncookies;
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struct ldc_trans_cookie cookies[VIO_MAX_RING_COOKIES];
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};
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#define VIO_TAG_SIZE ((int)sizeof(struct vio_msg_tag))
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#define VIO_VCC_MTU_SIZE (LDC_PACKET_SIZE - VIO_TAG_SIZE)
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struct vio_vcc {
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struct vio_msg_tag tag;
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char data[VIO_VCC_MTU_SIZE];
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};
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static inline void *vio_dring_cur(struct vio_dring_state *dr)
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{
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return dr->base + (dr->entry_size * dr->prod);
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}
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static inline void *vio_dring_entry(struct vio_dring_state *dr,
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unsigned int index)
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{
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return dr->base + (dr->entry_size * index);
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}
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static inline u32 vio_dring_avail(struct vio_dring_state *dr,
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unsigned int ring_size)
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{
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return (dr->pending -
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((dr->prod - dr->cons) & (ring_size - 1)) - 1);
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}
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static inline u32 vio_dring_next(struct vio_dring_state *dr, u32 index)
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{
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if (++index == dr->num_entries)
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index = 0;
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return index;
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}
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static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)
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{
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if (index == 0)
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return dr->num_entries - 1;
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else
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return index - 1;
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}
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#define VIO_MAX_TYPE_LEN 32
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#define VIO_MAX_NAME_LEN 32
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#define VIO_MAX_COMPAT_LEN 64
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struct vio_dev {
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u64 mp;
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struct device_node *dp;
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char node_name[VIO_MAX_NAME_LEN];
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char type[VIO_MAX_TYPE_LEN];
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char compat[VIO_MAX_COMPAT_LEN];
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int compat_len;
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u64 dev_no;
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unsigned long port_id;
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unsigned long channel_id;
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unsigned int tx_irq;
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unsigned int rx_irq;
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u64 rx_ino;
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u64 tx_ino;
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/* Handle to the root of "channel-devices" sub-tree in MDESC */
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u64 cdev_handle;
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/* MD specific data used to identify the vdev in MD */
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union md_node_info md_node_info;
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struct device dev;
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};
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struct vio_driver {
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const char *name;
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struct list_head node;
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const struct vio_device_id *id_table;
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int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
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int (*remove)(struct vio_dev *dev);
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void (*shutdown)(struct vio_dev *dev);
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unsigned long driver_data;
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struct device_driver driver;
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bool no_irq;
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};
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struct vio_version {
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u16 major;
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u16 minor;
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};
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struct vio_driver_state;
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struct vio_driver_ops {
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int (*send_attr)(struct vio_driver_state *vio);
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int (*handle_attr)(struct vio_driver_state *vio, void *pkt);
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void (*handshake_complete)(struct vio_driver_state *vio);
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};
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struct vio_completion {
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struct completion com;
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int err;
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int waiting_for;
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};
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struct vio_driver_state {
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/* Protects VIO handshake and, optionally, driver private state. */
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spinlock_t lock;
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struct ldc_channel *lp;
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u32 _peer_sid;
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u32 _local_sid;
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struct vio_dring_state drings[2];
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#define VIO_DRIVER_TX_RING 0
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#define VIO_DRIVER_RX_RING 1
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u8 hs_state;
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#define VIO_HS_INVALID 0x00
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#define VIO_HS_GOTVERS 0x01
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#define VIO_HS_GOT_ATTR 0x04
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#define VIO_HS_SENT_DREG 0x08
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#define VIO_HS_SENT_RDX 0x10
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#define VIO_HS_GOT_RDX_ACK 0x20
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#define VIO_HS_GOT_RDX 0x40
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#define VIO_HS_SENT_RDX_ACK 0x80
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#define VIO_HS_COMPLETE (VIO_HS_GOT_RDX_ACK | VIO_HS_SENT_RDX_ACK)
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u8 dev_class;
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u8 dr_state;
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#define VIO_DR_STATE_TXREG 0x01
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#define VIO_DR_STATE_RXREG 0x02
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#define VIO_DR_STATE_TXREQ 0x10
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#define VIO_DR_STATE_RXREQ 0x20
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u8 debug;
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#define VIO_DEBUG_HS 0x01
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#define VIO_DEBUG_DATA 0x02
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void *desc_buf;
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unsigned int desc_buf_len;
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struct vio_completion *cmp;
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struct vio_dev *vdev;
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struct timer_list timer;
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struct vio_version ver;
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struct vio_version *ver_table;
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int ver_table_entries;
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char *name;
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struct vio_driver_ops *ops;
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};
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static inline bool vio_version_before(struct vio_driver_state *vio,
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u16 major, u16 minor)
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{
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u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
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u32 want = (u32)major << 16 | minor;
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return have < want;
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}
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static inline bool vio_version_after(struct vio_driver_state *vio,
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u16 major, u16 minor)
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{
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u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
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u32 want = (u32)major << 16 | minor;
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return have > want;
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}
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static inline bool vio_version_after_eq(struct vio_driver_state *vio,
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u16 major, u16 minor)
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{
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u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
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u32 want = (u32)major << 16 | minor;
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return have >= want;
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}
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#define viodbg(TYPE, f, a...) \
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do { if (vio->debug & VIO_DEBUG_##TYPE) \
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printk(KERN_INFO "vio: ID[%lu] " f, \
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vio->vdev->channel_id, ## a); \
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} while (0)
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int __vio_register_driver(struct vio_driver *drv, struct module *owner,
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const char *mod_name);
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/*
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* vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
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*/
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#define vio_register_driver(driver) \
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__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
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void vio_unregister_driver(struct vio_driver *drv);
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static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
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{
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return container_of(drv, struct vio_driver, driver);
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}
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static inline struct vio_dev *to_vio_dev(struct device *dev)
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{
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return container_of(dev, struct vio_dev, dev);
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}
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int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
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void vio_link_state_change(struct vio_driver_state *vio, int event);
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void vio_conn_reset(struct vio_driver_state *vio);
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int vio_control_pkt_engine(struct vio_driver_state *vio, void *pkt);
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int vio_validate_sid(struct vio_driver_state *vio,
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struct vio_msg_tag *tp);
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u32 vio_send_sid(struct vio_driver_state *vio);
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int vio_ldc_alloc(struct vio_driver_state *vio,
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struct ldc_channel_config *base_cfg, void *event_arg);
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void vio_ldc_free(struct vio_driver_state *vio);
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int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
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u8 dev_class, struct vio_version *ver_table,
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int ver_table_size, struct vio_driver_ops *ops,
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char *name);
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void vio_port_up(struct vio_driver_state *vio);
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int vio_set_intr(unsigned long dev_ino, int state);
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u64 vio_vdev_node(struct mdesc_handle *hp, struct vio_dev *vdev);
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#endif /* _SPARC64_VIO_H */
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