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/*
* ioreq.h: Hardware virtual machine assist interface definitions.
*
* Copyright (c) 2016 Citrix Systems Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __XEN_IOREQ_H__
#define __XEN_IOREQ_H__
#include <xen/sched.h>
struct ioreq_page {
gfn_t gfn;
struct page_info *page;
void *va;
};
struct ioreq_vcpu {
struct list_head list_entry;
struct vcpu *vcpu;
evtchn_port_t ioreq_evtchn;
bool pending;
};
#define NR_IO_RANGE_TYPES (XEN_DMOP_IO_RANGE_PCI + 1)
#define MAX_NR_IO_RANGES 256
struct ioreq_server {
struct domain *target, *emulator;
/* Lock to serialize toolstack modifications */
spinlock_t lock;
struct ioreq_page ioreq;
struct list_head ioreq_vcpu_list;
struct ioreq_page bufioreq;
/* Lock to serialize access to buffered ioreq ring */
spinlock_t bufioreq_lock;
evtchn_port_t bufioreq_evtchn;
struct rangeset *range[NR_IO_RANGE_TYPES];
bool enabled;
uint8_t bufioreq_handling;
};
struct ioreq_server *get_ioreq_server(const struct domain *d,
unsigned int id);
static inline paddr_t ioreq_mmio_first_byte(const ioreq_t *p)
{
return unlikely(p->df) ?
p->addr - (p->count - 1ul) * p->size :
p->addr;
}
static inline paddr_t ioreq_mmio_last_byte(const ioreq_t *p)
{
unsigned long size = p->size;
return unlikely(p->df) ?
p->addr + size - 1:
p->addr + (p->count * size) - 1;
}
static inline bool ioreq_needs_completion(const ioreq_t *ioreq)
{
return ioreq->state == STATE_IOREQ_READY &&
!ioreq->data_is_ptr &&
(ioreq->type != IOREQ_TYPE_PIO || ioreq->dir != IOREQ_WRITE);
}
bool io_pending(struct vcpu *v);
bool handle_io_completion(struct vcpu *v);
bool is_ioreq_server_page(struct domain *d, const struct page_info *page);
int create_ioreq_server(struct domain *d, int bufioreq_handling,
ioservid_t *id);
int destroy_ioreq_server(struct domain *d, ioservid_t id);
int get_ioreq_server_info(struct domain *d, ioservid_t id,
unsigned long *ioreq_gfn,
unsigned long *bufioreq_gfn,
evtchn_port_t *bufioreq_port);
int get_ioreq_server_frame(struct domain *d, ioservid_t id,
unsigned long idx, mfn_t *mfn);
int map_io_range_to_ioreq_server(struct domain *d, ioservid_t id,
uint32_t type, uint64_t start,
uint64_t end);
int unmap_io_range_from_ioreq_server(struct domain *d, ioservid_t id,
uint32_t type, uint64_t start,
uint64_t end);
int set_ioreq_server_state(struct domain *d, ioservid_t id,
bool enabled);
int all_ioreq_servers_add_vcpu(struct domain *d, struct vcpu *v);
void all_ioreq_servers_remove_vcpu(struct domain *d, struct vcpu *v);
void destroy_all_ioreq_servers(struct domain *d);
struct ioreq_server *select_ioreq_server(struct domain *d,
ioreq_t *p);
int send_ioreq(struct ioreq_server *s, ioreq_t *proto_p,
bool buffered);
unsigned int broadcast_ioreq(ioreq_t *p, bool buffered);
void ioreq_init(struct domain *d);
#endif /* __XEN_IOREQ_H__ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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