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-rw-r--r--pc-bios/s390-ccw/cio.h322
-rw-r--r--pc-bios/s390-ccw/virtio.c274
-rw-r--r--pc-bios/s390-ccw/virtio.h158
3 files changed, 754 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
new file mode 100644
index 0000000000..cb5815accd
--- /dev/null
+++ b/pc-bios/s390-ccw/cio.h
@@ -0,0 +1,322 @@
+/*
+ * Channel IO definitions
+ *
+ * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ *
+ * Inspired by various s390 headers in Linux 3.9.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef CIO_H
+#define CIO_H
+
+/*
+ * path management control word
+ */
+struct pmcw {
+ __u32 intparm; /* interruption parameter */
+ __u32 qf : 1; /* qdio facility */
+ __u32 w : 1;
+ __u32 isc : 3; /* interruption sublass */
+ __u32 res5 : 3; /* reserved zeros */
+ __u32 ena : 1; /* enabled */
+ __u32 lm : 2; /* limit mode */
+ __u32 mme : 2; /* measurement-mode enable */
+ __u32 mp : 1; /* multipath mode */
+ __u32 tf : 1; /* timing facility */
+ __u32 dnv : 1; /* device number valid */
+ __u32 dev : 16; /* device number */
+ __u8 lpm; /* logical path mask */
+ __u8 pnom; /* path not operational mask */
+ __u8 lpum; /* last path used mask */
+ __u8 pim; /* path installed mask */
+ __u16 mbi; /* measurement-block index */
+ __u8 pom; /* path operational mask */
+ __u8 pam; /* path available mask */
+ __u8 chpid[8]; /* CHPID 0-7 (if available) */
+ __u32 unused1 : 8; /* reserved zeros */
+ __u32 st : 3; /* subchannel type */
+ __u32 unused2 : 18; /* reserved zeros */
+ __u32 mbfc : 1; /* measurement block format control */
+ __u32 xmwme : 1; /* extended measurement word mode enable */
+ __u32 csense : 1; /* concurrent sense; can be enabled ...*/
+ /* ... per MSCH, however, if facility */
+ /* ... is not installed, this results */
+ /* ... in an operand exception. */
+} __attribute__ ((packed));
+
+/* Target SCHIB configuration. */
+struct schib_config {
+ __u64 mba;
+ __u32 intparm;
+ __u16 mbi;
+ __u32 isc:3;
+ __u32 ena:1;
+ __u32 mme:2;
+ __u32 mp:1;
+ __u32 csense:1;
+ __u32 mbfc:1;
+} __attribute__ ((packed));
+
+struct scsw {
+ __u16 flags;
+ __u16 ctrl;
+ __u32 cpa;
+ __u8 dstat;
+ __u8 cstat;
+ __u16 count;
+} __attribute__ ((packed));
+
+#define SCSW_FCTL_CLEAR_FUNC 0x1000
+#define SCSW_FCTL_HALT_FUNC 0x2000
+#define SCSW_FCTL_START_FUNC 0x4000
+
+/*
+ * subchannel information block
+ */
+struct schib {
+ struct pmcw pmcw; /* path management control word */
+ struct scsw scsw; /* subchannel status word */
+ __u64 mba; /* measurement block address */
+ __u8 mda[4]; /* model dependent area */
+} __attribute__ ((packed,aligned(4)));
+
+struct subchannel_id {
+ __u32 cssid : 8;
+ __u32 : 4;
+ __u32 m : 1;
+ __u32 ssid : 2;
+ __u32 one : 1;
+ __u32 sch_no : 16;
+} __attribute__ ((packed, aligned(4)));
+
+/*
+ * TPI info structure
+ */
+struct tpi_info {
+ struct subchannel_id schid;
+ __u32 intparm; /* interruption parameter */
+ __u32 adapter_IO : 1;
+ __u32 reserved2 : 1;
+ __u32 isc : 3;
+ __u32 reserved3 : 12;
+ __u32 int_type : 3;
+ __u32 reserved4 : 12;
+} __attribute__ ((packed));
+
+/* channel command word (type 1) */
+struct ccw1 {
+ __u8 cmd_code;
+ __u8 flags;
+ __u16 count;
+ __u32 cda;
+} __attribute__ ((packed));
+
+#define CCW_FLAG_DC 0x80
+#define CCW_FLAG_CC 0x40
+#define CCW_FLAG_SLI 0x20
+#define CCW_FLAG_SKIP 0x10
+#define CCW_FLAG_PCI 0x08
+#define CCW_FLAG_IDA 0x04
+#define CCW_FLAG_SUSPEND 0x02
+
+#define CCW_CMD_NOOP 0x03
+#define CCW_CMD_BASIC_SENSE 0x04
+#define CCW_CMD_TIC 0x08
+#define CCW_CMD_SENSE_ID 0xe4
+
+#define CCW_CMD_SET_VQ 0x13
+#define CCW_CMD_VDEV_RESET 0x33
+#define CCW_CMD_READ_FEAT 0x12
+#define CCW_CMD_WRITE_FEAT 0x11
+#define CCW_CMD_READ_CONF 0x22
+#define CCW_CMD_WRITE_CONF 0x21
+#define CCW_CMD_WRITE_STATUS 0x31
+#define CCW_CMD_SET_IND 0x43
+#define CCW_CMD_SET_CONF_IND 0x53
+#define CCW_CMD_READ_VQ_CONF 0x32
+
+/*
+ * Command-mode operation request block
+ */
+struct cmd_orb {
+ __u32 intparm; /* interruption parameter */
+ __u32 key:4; /* flags, like key, suspend control, etc. */
+ __u32 spnd:1; /* suspend control */
+ __u32 res1:1; /* reserved */
+ __u32 mod:1; /* modification control */
+ __u32 sync:1; /* synchronize control */
+ __u32 fmt:1; /* format control */
+ __u32 pfch:1; /* prefetch control */
+ __u32 isic:1; /* initial-status-interruption control */
+ __u32 alcc:1; /* address-limit-checking control */
+ __u32 ssic:1; /* suppress-suspended-interr. control */
+ __u32 res2:1; /* reserved */
+ __u32 c64:1; /* IDAW/QDIO 64 bit control */
+ __u32 i2k:1; /* IDAW 2/4kB block size control */
+ __u32 lpm:8; /* logical path mask */
+ __u32 ils:1; /* incorrect length */
+ __u32 zero:6; /* reserved zeros */
+ __u32 orbx:1; /* ORB extension control */
+ __u32 cpa; /* channel program address */
+} __attribute__ ((packed, aligned(4)));
+
+struct ciw {
+ __u8 type;
+ __u8 command;
+ __u16 count;
+};
+
+/*
+ * sense-id response buffer layout
+ */
+struct senseid {
+ /* common part */
+ __u8 reserved; /* always 0x'FF' */
+ __u16 cu_type; /* control unit type */
+ __u8 cu_model; /* control unit model */
+ __u16 dev_type; /* device type */
+ __u8 dev_model; /* device model */
+ __u8 unused; /* padding byte */
+ /* extended part */
+ struct ciw ciw[62];
+} __attribute__ ((packed, aligned(4)));
+
+/* interruption response block */
+struct irb {
+ struct scsw scsw;
+ __u32 esw[5];
+ __u32 ecw[8];
+ __u32 emw[8];
+} __attribute__ ((packed, aligned(4)));
+
+/*
+ * Some S390 specific IO instructions as inline
+ */
+
+static inline int stsch_err(struct subchannel_id schid, struct schib *addr)
+{
+ register struct subchannel_id reg1 asm ("1") = schid;
+ int ccode = -EIO;
+
+ asm volatile(
+ " stsch 0(%3)\n"
+ "0: ipm %0\n"
+ " srl %0,28\n"
+ "1:\n"
+ : "+d" (ccode), "=m" (*addr)
+ : "d" (reg1), "a" (addr)
+ : "cc");
+ return ccode;
+}
+
+static inline int msch(struct subchannel_id schid, struct schib *addr)
+{
+ register struct subchannel_id reg1 asm ("1") = schid;
+ int ccode;
+
+ asm volatile(
+ " msch 0(%2)\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode)
+ : "d" (reg1), "a" (addr), "m" (*addr)
+ : "cc");
+ return ccode;
+}
+
+static inline int msch_err(struct subchannel_id schid, struct schib *addr)
+{
+ register struct subchannel_id reg1 asm ("1") = schid;
+ int ccode = -EIO;
+
+ asm volatile(
+ " msch 0(%2)\n"
+ "0: ipm %0\n"
+ " srl %0,28\n"
+ "1:\n"
+ : "+d" (ccode)
+ : "d" (reg1), "a" (addr), "m" (*addr)
+ : "cc");
+ return ccode;
+}
+
+static inline int tsch(struct subchannel_id schid, struct irb *addr)
+{
+ register struct subchannel_id reg1 asm ("1") = schid;
+ int ccode;
+
+ asm volatile(
+ " tsch 0(%3)\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode), "=m" (*addr)
+ : "d" (reg1), "a" (addr)
+ : "cc");
+ return ccode;
+}
+
+static inline int ssch(struct subchannel_id schid, struct cmd_orb *addr)
+{
+ register struct subchannel_id reg1 asm("1") = schid;
+ int ccode = -EIO;
+
+ asm volatile(
+ " ssch 0(%2)\n"
+ "0: ipm %0\n"
+ " srl %0,28\n"
+ "1:\n"
+ : "+d" (ccode)
+ : "d" (reg1), "a" (addr), "m" (*addr)
+ : "cc", "memory");
+ return ccode;
+}
+
+static inline int csch(struct subchannel_id schid)
+{
+ register struct subchannel_id reg1 asm("1") = schid;
+ int ccode;
+
+ asm volatile(
+ " csch\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode)
+ : "d" (reg1)
+ : "cc");
+ return ccode;
+}
+
+static inline int tpi(struct tpi_info *addr)
+{
+ int ccode;
+
+ asm volatile(
+ " tpi 0(%2)\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode), "=m" (*addr)
+ : "a" (addr)
+ : "cc");
+ return ccode;
+}
+
+static inline int chsc(void *chsc_area)
+{
+ typedef struct { char _[4096]; } addr_type;
+ int cc;
+
+ asm volatile(
+ " .insn rre,0xb25f0000,%2,0\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=d" (cc), "=m" (*(addr_type *) chsc_area)
+ : "d" (chsc_area), "m" (*(addr_type *) chsc_area)
+ : "cc");
+ return cc;
+}
+
+#endif /* CIO_H */
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
new file mode 100644
index 0000000000..79e2941618
--- /dev/null
+++ b/pc-bios/s390-ccw/virtio.c
@@ -0,0 +1,274 @@
+/*
+ * Virtio driver bits
+ *
+ * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "s390-ccw.h"
+#include "virtio.h"
+
+struct vring block;
+
+static long kvm_hypercall(unsigned long nr, unsigned long param1,
+ unsigned long param2)
+{
+ register ulong r_nr asm("1") = nr;
+ register ulong r_param1 asm("2") = param1;
+ register ulong r_param2 asm("3") = param2;
+ register long retval asm("2");
+
+ asm volatile ("diag 2,4,0x500"
+ : "=d" (retval)
+ : "d" (r_nr), "0" (r_param1), "r"(r_param2)
+ : "memory", "cc");
+
+ return retval;
+}
+
+static void virtio_notify(struct subchannel_id schid)
+{
+ kvm_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY, *(u32*)&schid, 0);
+}
+
+/***********************************************
+ * Virtio functions *
+ ***********************************************/
+
+static void drain_irqs(struct subchannel_id schid)
+{
+ struct irb irb = {};
+ while (1) {
+ if (tsch(schid, &irb)) {
+ return;
+ }
+ }
+}
+
+static int run_ccw(struct subchannel_id schid, int cmd, void *ptr, int len)
+{
+ struct ccw1 ccw = {};
+ struct cmd_orb orb = {};
+ struct schib schib;
+ int r;
+
+ /* start command processing */
+ stsch_err(schid, &schib);
+ schib.scsw.ctrl = SCSW_FCTL_START_FUNC;
+ msch(schid, &schib);
+
+ /* start subchannel command */
+ orb.fmt = 1;
+ orb.cpa = (u32)(long)&ccw;
+ orb.lpm = 0x80;
+
+ ccw.cmd_code = cmd;
+ ccw.cda = (long)ptr;
+ ccw.count = len;
+
+ r = ssch(schid, &orb);
+ /*
+ * XXX Wait until device is done processing the CCW. For now we can
+ * assume that a simple tsch will have finished the CCW processing,
+ * but the architecture allows for asynchronous operation
+ */
+ drain_irqs(schid);
+ return r;
+}
+
+static void virtio_set_status(struct subchannel_id schid,
+ unsigned long dev_addr)
+{
+ unsigned char status = dev_addr;
+ run_ccw(schid, CCW_CMD_WRITE_STATUS, &status, sizeof(status));
+}
+
+static void virtio_reset(struct subchannel_id schid)
+{
+ run_ccw(schid, CCW_CMD_VDEV_RESET, NULL, 0);
+}
+
+static void vring_init(struct vring *vr, unsigned int num, void *p,
+ unsigned long align)
+{
+ debug_print_addr("init p", p);
+ vr->num = num;
+ vr->desc = p;
+ vr->avail = p + num*sizeof(struct vring_desc);
+ vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + align-1)
+ & ~(align - 1));
+
+ /* We're running with interrupts off anyways, so don't bother */
+ vr->used->flags = VRING_USED_F_NO_NOTIFY;
+
+ debug_print_addr("init vr", vr);
+}
+
+static void vring_notify(struct subchannel_id schid)
+{
+ virtio_notify(schid);
+}
+
+static void vring_send_buf(struct vring *vr, void *p, int len, int flags)
+{
+ /* For follow-up chains we need to keep the first entry point */
+ if (!(flags & VRING_HIDDEN_IS_CHAIN)) {
+ vr->avail->ring[vr->avail->idx % vr->num] = vr->next_idx;
+ }
+
+ vr->desc[vr->next_idx].addr = (ulong)p;
+ vr->desc[vr->next_idx].len = len;
+ vr->desc[vr->next_idx].flags = flags & ~VRING_HIDDEN_IS_CHAIN;
+ vr->desc[vr->next_idx].next = ++vr->next_idx;
+
+ /* Chains only have a single ID */
+ if (!(flags & VRING_DESC_F_NEXT)) {
+ vr->avail->idx++;
+ }
+
+ vr->used->idx = vr->next_idx;
+}
+
+static u64 get_clock(void)
+{
+ u64 r;
+
+ asm volatile("stck %0" : "=Q" (r) : : "cc");
+ return r;
+}
+
+static ulong get_second(void)
+{
+ return (get_clock() >> 12) / 1000000;
+}
+
+/*
+ * Wait for the host to reply.
+ *
+ * timeout is in seconds if > 0.
+ *
+ * Returns 0 on success, 1 on timeout.
+ */
+static int vring_wait_reply(struct vring *vr, int timeout)
+{
+ ulong target_second = get_second() + timeout;
+ struct subchannel_id schid = vr->schid;
+ int r = 0;
+
+ while (vr->used->idx == vr->next_idx) {
+ vring_notify(schid);
+ if (timeout && (get_second() >= target_second)) {
+ r = 1;
+ break;
+ }
+ yield();
+ }
+
+ vr->next_idx = 0;
+ vr->desc[0].len = 0;
+ vr->desc[0].flags = 0;
+
+ return r;
+}
+
+/***********************************************
+ * Virtio block *
+ ***********************************************/
+
+static int virtio_read_many(ulong sector, void *load_addr, int sec_num)
+{
+ struct virtio_blk_outhdr out_hdr;
+ u8 status;
+
+ /* Tell the host we want to read */
+ out_hdr.type = VIRTIO_BLK_T_IN;
+ out_hdr.ioprio = 99;
+ out_hdr.sector = sector;
+
+ vring_send_buf(&block, &out_hdr, sizeof(out_hdr), VRING_DESC_F_NEXT);
+
+ /* This is where we want to receive data */
+ vring_send_buf(&block, load_addr, SECTOR_SIZE * sec_num,
+ VRING_DESC_F_WRITE | VRING_HIDDEN_IS_CHAIN |
+ VRING_DESC_F_NEXT);
+
+ /* status field */
+ vring_send_buf(&block, &status, sizeof(u8), VRING_DESC_F_WRITE |
+ VRING_HIDDEN_IS_CHAIN);
+
+ /* Now we can tell the host to read */
+ vring_wait_reply(&block, 0);
+
+ drain_irqs(block.schid);
+
+ return status;
+}
+
+unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
+ ulong subchan_id, void *load_addr)
+{
+ u8 status;
+ int sec = rec_list1;
+ int sec_num = (((rec_list2 >> 32)+ 1) & 0xffff);
+ int sec_len = rec_list2 >> 48;
+ ulong addr = (ulong)load_addr;
+
+ if (sec_len != SECTOR_SIZE) {
+ return -1;
+ }
+
+ sclp_print(".");
+ status = virtio_read_many(sec, (void*)addr, sec_num);
+ if (status) {
+ virtio_panic("I/O Error");
+ }
+ addr += sec_num * SECTOR_SIZE;
+
+ return addr;
+}
+
+int virtio_read(ulong sector, void *load_addr)
+{
+ return virtio_read_many(sector, load_addr, 1);
+}
+
+void virtio_setup_block(struct subchannel_id schid)
+{
+ struct vq_info_block info;
+
+ virtio_reset(schid);
+
+ /* XXX need to fetch the 128 from host */
+ vring_init(&block, 128, (void*)(100 * 1024 * 1024),
+ KVM_S390_VIRTIO_RING_ALIGN);
+
+ info.queue = (100ULL * 1024ULL* 1024ULL);
+ info.align = KVM_S390_VIRTIO_RING_ALIGN;
+ info.index = 0;
+ info.num = 128;
+ block.schid = schid;
+
+ run_ccw(schid, CCW_CMD_SET_VQ, &info, sizeof(info));
+ virtio_set_status(schid, VIRTIO_CONFIG_S_DRIVER_OK);
+}
+
+bool virtio_is_blk(struct subchannel_id schid)
+{
+ int r;
+ struct senseid senseid = {};
+
+ /* run sense id command */
+ r = run_ccw(schid, CCW_CMD_SENSE_ID, &senseid, sizeof(senseid));
+ if (r) {
+ return false;
+ }
+ if ((senseid.cu_type != 0x3832) || (senseid.cu_model != VIRTIO_ID_BLOCK)) {
+ return false;
+ }
+
+ return true;
+}
+
diff --git a/pc-bios/s390-ccw/virtio.h b/pc-bios/s390-ccw/virtio.h
new file mode 100644
index 0000000000..a33199dd08
--- /dev/null
+++ b/pc-bios/s390-ccw/virtio.h
@@ -0,0 +1,158 @@
+/*
+ * Virtio driver bits
+ *
+ * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#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 have found a driver for the device. */
+#define VIRTIO_CONFIG_S_DRIVER 2
+/* Driver has used its parts of the config, and is happy */
+#define VIRTIO_CONFIG_S_DRIVER_OK 4
+/* We've given up on this device. */
+#define VIRTIO_CONFIG_S_FAILED 0x80
+
+enum virtio_dev_type {
+ VIRTIO_ID_NET = 1,
+ VIRTIO_ID_BLOCK = 2,
+ VIRTIO_ID_CONSOLE = 3,
+ VIRTIO_ID_BALLOON = 5,
+};
+
+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;
+} __attribute__((packed));
+
+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 VRING_USED_F_NO_NOTIFY 1
+
+/* This marks a buffer as continuing via the next field. */
+#define VRING_DESC_F_NEXT 1
+/* This marks a buffer as write-only (otherwise read-only). */
+#define VRING_DESC_F_WRITE 2
+/* This means the buffer contains a list of buffer descriptors. */
+#define VRING_DESC_F_INDIRECT 4
+
+/* Internal flag to mark follow-up segments as such */
+#define VRING_HIDDEN_IS_CHAIN 256
+
+/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */
+struct vring_desc {
+ /* Address (guest-physical). */
+ u64 addr;
+ /* Length. */
+ u32 len;
+ /* The flags as indicated above. */
+ u16 flags;
+ /* We chain unused descriptors via this, too */
+ u16 next;
+} __attribute__((packed));
+
+struct vring_avail {
+ u16 flags;
+ u16 idx;
+ u16 ring[];
+} __attribute__((packed));
+
+/* u32 is used here for ids for padding reasons. */
+struct vring_used_elem {
+ /* Index of start of used descriptor chain. */
+ u32 id;
+ /* Total length of the descriptor chain which was used (written to) */
+ u32 len;
+} __attribute__((packed));
+
+struct vring_used {
+ u16 flags;
+ u16 idx;
+ struct vring_used_elem ring[];
+} __attribute__((packed));
+
+struct vring {
+ unsigned int num;
+ int next_idx;
+ struct vring_desc *desc;
+ struct vring_avail *avail;
+ struct vring_used *used;
+ struct subchannel_id schid;
+};
+
+
+/***********************************************
+ * Virtio block *
+ ***********************************************/
+
+/*
+ * Command types
+ *
+ * Usage is a bit tricky as some bits are used as flags and some are not.
+ *
+ * Rules:
+ * VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or
+ * VIRTIO_BLK_T_BARRIER. VIRTIO_BLK_T_FLUSH is a command of its own
+ * and may not be combined with any of the other flags.
+ */
+
+/* These two define direction. */
+#define VIRTIO_BLK_T_IN 0
+#define VIRTIO_BLK_T_OUT 1
+
+/* This bit says it's a scsi command, not an actual read or write. */
+#define VIRTIO_BLK_T_SCSI_CMD 2
+
+/* Cache flush command */
+#define VIRTIO_BLK_T_FLUSH 4
+
+/* Barrier before this op. */
+#define VIRTIO_BLK_T_BARRIER 0x80000000
+
+/* This is the first element of the read scatter-gather list. */
+struct virtio_blk_outhdr {
+ /* VIRTIO_BLK_T* */
+ u32 type;
+ /* io priority. */
+ u32 ioprio;
+ /* Sector (ie. 512 byte offset) */
+ u64 sector;
+};
+
+#endif /* VIRTIO_H */