2 * vfio based device assignment support - PCI devices
4 * Copyright Red Hat, Inc. 2012-2015
7 * Alex Williamson <alex.williamson@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 #ifndef HW_VFIO_VFIO_PCI_H
13 #define HW_VFIO_VFIO_PCI_H
15 #include "qemu-common.h"
16 #include "exec/memory.h"
17 #include "hw/pci/pci.h"
18 #include "hw/vfio/vfio-common.h"
19 #include "qemu/event_notifier.h"
20 #include "qemu/queue.h"
21 #include "qemu/timer.h"
25 typedef struct VFIOQuirk
{
26 QLIST_ENTRY(VFIOQuirk
) next
;
32 typedef struct VFIOBAR
{
36 QLIST_HEAD(, VFIOQuirk
) quirks
;
39 typedef struct VFIOVGARegion
{
43 QLIST_HEAD(, VFIOQuirk
) quirks
;
46 typedef struct VFIOVGA
{
49 VFIOVGARegion region
[QEMU_PCI_VGA_NUM_REGIONS
];
52 typedef struct VFIOINTx
{
53 bool pending
; /* interrupt pending */
54 bool kvm_accel
; /* set when QEMU bypass through KVM enabled */
55 uint8_t pin
; /* which pin to pull for qemu_set_irq */
56 EventNotifier interrupt
; /* eventfd triggered on interrupt */
57 EventNotifier unmask
; /* eventfd for unmask on QEMU bypass */
58 PCIINTxRoute route
; /* routing info for QEMU bypass */
59 uint32_t mmap_timeout
; /* delay to re-enable mmaps after interrupt */
60 QEMUTimer
*mmap_timer
; /* enable mmaps after periods w/o interrupts */
63 typedef struct VFIOMSIVector
{
65 * Two interrupt paths are configured per vector. The first, is only used
66 * for interrupts injected via QEMU. This is typically the non-accel path,
67 * but may also be used when we want QEMU to handle masking and pending
68 * bits. The KVM path bypasses QEMU and is therefore higher performance,
69 * but requires masking at the device. virq is used to track the MSI route
70 * through KVM, thus kvm_interrupt is only available when virq is set to a
73 EventNotifier interrupt
;
74 EventNotifier kvm_interrupt
;
75 struct VFIOPCIDevice
*vdev
; /* back pointer to device */
87 /* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
88 typedef struct VFIOMSIXInfo
{
92 uint32_t table_offset
;
94 MemoryRegion mmap_mem
;
98 typedef struct VFIOPCIDevice
{
102 unsigned int config_size
;
103 uint8_t *emulated_config_bits
; /* QEMU emulated bits, little-endian */
104 off_t config_offset
; /* Offset of config space region within device fd */
105 unsigned int rom_size
;
106 off_t rom_offset
; /* Offset of ROM region within device fd */
109 VFIOMSIVector
*msi_vectors
;
111 int nr_vectors
; /* Number of MSI/MSIX vectors currently in use */
112 int interrupt
; /* Current interrupt type */
113 VFIOBAR bars
[PCI_NUM_REGIONS
- 1]; /* No ROM */
114 VFIOVGA vga
; /* 0xa0000, 0x3b0, 0x3c0 */
115 PCIHostDeviceAddress host
;
116 EventNotifier err_notifier
;
117 EventNotifier req_notifier
;
118 int (*resetfn
)(struct VFIOPCIDevice
*);
122 #define VFIO_FEATURE_ENABLE_VGA_BIT 0
123 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
124 #define VFIO_FEATURE_ENABLE_REQ_BIT 1
125 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
133 bool rom_read_failed
;
139 uint32_t vfio_pci_read_config(PCIDevice
*pdev
, uint32_t addr
, int len
);
140 void vfio_pci_write_config(PCIDevice
*pdev
,
141 uint32_t addr
, uint32_t val
, int len
);
143 uint64_t vfio_vga_read(void *opaque
, hwaddr addr
, unsigned size
);
144 void vfio_vga_write(void *opaque
, hwaddr addr
, uint64_t data
, unsigned size
);
146 bool vfio_blacklist_opt_rom(VFIOPCIDevice
*vdev
);
147 void vfio_vga_quirk_setup(VFIOPCIDevice
*vdev
);
148 void vfio_vga_quirk_teardown(VFIOPCIDevice
*vdev
);
149 void vfio_vga_quirk_free(VFIOPCIDevice
*vdev
);
150 void vfio_bar_quirk_setup(VFIOPCIDevice
*vdev
, int nr
);
151 void vfio_bar_quirk_teardown(VFIOPCIDevice
*vdev
, int nr
);
152 void vfio_bar_quirk_free(VFIOPCIDevice
*vdev
, int nr
);
153 void vfio_setup_resetfn_quirk(VFIOPCIDevice
*vdev
);
155 #endif /* HW_VFIO_VFIO_PCI_H */