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/******************************************************************************
* irq.h
*
* Interrupt distribution and delivery logic.
*
* Copyright (c) 2006, K A Fraser, XenSource 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, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*/
#ifndef __XEN_HVM_IRQ_H__
#define __XEN_HVM_IRQ_H__
#include <xen/types.h>
#include <xen/spinlock.h>
#include <xen/tasklet.h>
#include <xen/timer.h>
#include <public/hvm/save.h>
struct dev_intx_gsi_link {
struct list_head list;
uint8_t device;
uint8_t intx;
uint8_t gsi;
uint8_t link;
};
#define _HVM_IRQ_DPCI_MACH_PCI_SHIFT 0
#define _HVM_IRQ_DPCI_MACH_MSI_SHIFT 1
#define _HVM_IRQ_DPCI_MAPPED_SHIFT 2
#define _HVM_IRQ_DPCI_EOI_LATCH_SHIFT 3
#define _HVM_IRQ_DPCI_GUEST_PCI_SHIFT 4
#define _HVM_IRQ_DPCI_GUEST_MSI_SHIFT 5
#define _HVM_IRQ_DPCI_TRANSLATE_SHIFT 15
#define HVM_IRQ_DPCI_MACH_PCI (1 << _HVM_IRQ_DPCI_MACH_PCI_SHIFT)
#define HVM_IRQ_DPCI_MACH_MSI (1 << _HVM_IRQ_DPCI_MACH_MSI_SHIFT)
#define HVM_IRQ_DPCI_MAPPED (1 << _HVM_IRQ_DPCI_MAPPED_SHIFT)
#define HVM_IRQ_DPCI_EOI_LATCH (1 << _HVM_IRQ_DPCI_EOI_LATCH_SHIFT)
#define HVM_IRQ_DPCI_GUEST_PCI (1 << _HVM_IRQ_DPCI_GUEST_PCI_SHIFT)
#define HVM_IRQ_DPCI_GUEST_MSI (1 << _HVM_IRQ_DPCI_GUEST_MSI_SHIFT)
#define HVM_IRQ_DPCI_TRANSLATE (1 << _HVM_IRQ_DPCI_TRANSLATE_SHIFT)
#define VMSI_DEST_ID_MASK 0xff
#define VMSI_RH_MASK 0x100
#define VMSI_DM_MASK 0x200
#define VMSI_DELIV_MASK 0x7000
#define VMSI_TRIG_MODE 0x8000
#define GFLAGS_SHIFT_RH 8
#define GFLAGS_SHIFT_DELIV_MODE 12
#define GFLAGS_SHIFT_TRG_MODE 15
struct hvm_gmsi_info {
uint32_t gvec;
uint32_t gflags;
int dest_vcpu_id; /* -1 :multi-dest, non-negative: dest_vcpu_id */
};
struct hvm_girq_dpci_mapping {
struct list_head list;
uint8_t device;
uint8_t intx;
uint8_t machine_gsi;
};
#define NR_ISAIRQS 16
#define NR_LINK 4
#if defined(CONFIG_X86)
# define NR_HVM_IRQS VIOAPIC_NUM_PINS
#endif
/* Protected by domain's event_lock */
struct hvm_irq_dpci {
/* Guest IRQ to guest device/intx mapping. */
struct list_head girq[NR_HVM_IRQS];
/* Record of mapped ISA IRQs */
DECLARE_BITMAP(isairq_map, NR_ISAIRQS);
/* Record of mapped Links */
uint8_t link_cnt[NR_LINK];
struct tasklet dirq_tasklet;
};
/* Machine IRQ to guest device/intx mapping. */
struct hvm_pirq_dpci {
uint32_t flags;
bool_t masked;
uint16_t pending;
struct list_head digl_list;
struct domain *dom;
struct hvm_gmsi_info gmsi;
struct timer timer;
};
void pt_pirq_init(struct domain *, struct hvm_pirq_dpci *);
bool_t pt_pirq_cleanup_check(struct hvm_pirq_dpci *);
int pt_pirq_iterate(struct domain *d,
int (*cb)(struct domain *,
struct hvm_pirq_dpci *, void *arg),
void *arg);
/* Modify state of a PCI INTx wire. */
void hvm_pci_intx_assert(
struct domain *d, unsigned int device, unsigned int intx);
void hvm_pci_intx_deassert(
struct domain *d, unsigned int device, unsigned int intx);
/* Modify state of an ISA device's IRQ wire. */
void hvm_isa_irq_assert(
struct domain *d, unsigned int isa_irq);
void hvm_isa_irq_deassert(
struct domain *d, unsigned int isa_irq);
void hvm_set_pci_link_route(struct domain *d, u8 link, u8 isa_irq);
void hvm_inject_msi(struct domain *d, uint64_t addr, uint32_t data);
void hvm_maybe_deassert_evtchn_irq(void);
void hvm_assert_evtchn_irq(struct vcpu *v);
void hvm_set_callback_via(struct domain *d, uint64_t via);
#endif /* __XEN_HVM_IRQ_H__ */
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