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
{
27 struct VFIOPCIDevice
*vdev
;
28 QLIST_ENTRY(VFIOQuirk
) next
;
30 uint32_t base_offset
:TARGET_PAGE_BITS
;
31 uint32_t address_offset
:TARGET_PAGE_BITS
;
32 uint32_t address_size
:3;
35 uint32_t address_match
;
36 uint32_t address_mask
;
38 uint32_t address_val
:TARGET_PAGE_BITS
;
39 uint32_t data_offset
:TARGET_PAGE_BITS
;
48 typedef struct VFIOBAR
{
52 QLIST_HEAD(, VFIOQuirk
) quirks
;
55 typedef struct VFIOVGARegion
{
59 QLIST_HEAD(, VFIOQuirk
) quirks
;
62 typedef struct VFIOVGA
{
65 VFIOVGARegion region
[QEMU_PCI_VGA_NUM_REGIONS
];
68 typedef struct VFIOINTx
{
69 bool pending
; /* interrupt pending */
70 bool kvm_accel
; /* set when QEMU bypass through KVM enabled */
71 uint8_t pin
; /* which pin to pull for qemu_set_irq */
72 EventNotifier interrupt
; /* eventfd triggered on interrupt */
73 EventNotifier unmask
; /* eventfd for unmask on QEMU bypass */
74 PCIINTxRoute route
; /* routing info for QEMU bypass */
75 uint32_t mmap_timeout
; /* delay to re-enable mmaps after interrupt */
76 QEMUTimer
*mmap_timer
; /* enable mmaps after periods w/o interrupts */
79 typedef struct VFIOMSIVector
{
81 * Two interrupt paths are configured per vector. The first, is only used
82 * for interrupts injected via QEMU. This is typically the non-accel path,
83 * but may also be used when we want QEMU to handle masking and pending
84 * bits. The KVM path bypasses QEMU and is therefore higher performance,
85 * but requires masking at the device. virq is used to track the MSI route
86 * through KVM, thus kvm_interrupt is only available when virq is set to a
89 EventNotifier interrupt
;
90 EventNotifier kvm_interrupt
;
91 struct VFIOPCIDevice
*vdev
; /* back pointer to device */
103 /* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
104 typedef struct VFIOMSIXInfo
{
108 uint32_t table_offset
;
110 MemoryRegion mmap_mem
;
114 typedef struct VFIOPCIDevice
{
118 unsigned int config_size
;
119 uint8_t *emulated_config_bits
; /* QEMU emulated bits, little-endian */
120 off_t config_offset
; /* Offset of config space region within device fd */
121 unsigned int rom_size
;
122 off_t rom_offset
; /* Offset of ROM region within device fd */
125 VFIOMSIVector
*msi_vectors
;
127 int nr_vectors
; /* Number of MSI/MSIX vectors currently in use */
128 int interrupt
; /* Current interrupt type */
129 VFIOBAR bars
[PCI_NUM_REGIONS
- 1]; /* No ROM */
130 VFIOVGA vga
; /* 0xa0000, 0x3b0, 0x3c0 */
131 PCIHostDeviceAddress host
;
132 EventNotifier err_notifier
;
133 EventNotifier req_notifier
;
134 int (*resetfn
)(struct VFIOPCIDevice
*);
136 #define VFIO_FEATURE_ENABLE_VGA_BIT 0
137 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
138 #define VFIO_FEATURE_ENABLE_REQ_BIT 1
139 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
147 bool rom_read_failed
;
153 uint32_t vfio_pci_read_config(PCIDevice
*pdev
, uint32_t addr
, int len
);
154 void vfio_pci_write_config(PCIDevice
*pdev
,
155 uint32_t addr
, uint32_t val
, int len
);
157 uint64_t vfio_vga_read(void *opaque
, hwaddr addr
, unsigned size
);
158 void vfio_vga_write(void *opaque
, hwaddr addr
, uint64_t data
, unsigned size
);
160 bool vfio_blacklist_opt_rom(VFIOPCIDevice
*vdev
);
161 void vfio_vga_quirk_setup(VFIOPCIDevice
*vdev
);
162 void vfio_vga_quirk_teardown(VFIOPCIDevice
*vdev
);
163 void vfio_vga_quirk_free(VFIOPCIDevice
*vdev
);
164 void vfio_bar_quirk_setup(VFIOPCIDevice
*vdev
, int nr
);
165 void vfio_bar_quirk_teardown(VFIOPCIDevice
*vdev
, int nr
);
166 void vfio_bar_quirk_free(VFIOPCIDevice
*vdev
, int nr
);
168 #endif /* HW_VFIO_VFIO_PCI_H */