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 "exec/memory.h"
16 #include "hw/pci/pci_device.h"
17 #include "hw/vfio/vfio-common.h"
18 #include "qemu/event_notifier.h"
19 #include "qemu/queue.h"
20 #include "qemu/timer.h"
21 #include "qom/object.h"
22 #include "sysemu/kvm.h"
24 #define PCI_ANY_ID (~0)
28 typedef struct VFIOIOEventFD
{
29 QLIST_ENTRY(VFIOIOEventFD
) next
;
37 bool dynamic
; /* Added runtime, removed on device reset */
41 typedef struct VFIOQuirk
{
42 QLIST_ENTRY(VFIOQuirk
) next
;
44 QLIST_HEAD(, VFIOIOEventFD
) ioeventfds
;
47 void (*reset
)(struct VFIOPCIDevice
*vdev
, struct VFIOQuirk
*quirk
);
50 typedef struct VFIOBAR
{
57 QLIST_HEAD(, VFIOQuirk
) quirks
;
60 typedef struct VFIOVGARegion
{
64 QLIST_HEAD(, VFIOQuirk
) quirks
;
67 typedef struct VFIOVGA
{
70 VFIOVGARegion region
[QEMU_PCI_VGA_NUM_REGIONS
];
73 typedef struct VFIOINTx
{
74 bool pending
; /* interrupt pending */
75 bool kvm_accel
; /* set when QEMU bypass through KVM enabled */
76 uint8_t pin
; /* which pin to pull for qemu_set_irq */
77 EventNotifier interrupt
; /* eventfd triggered on interrupt */
78 EventNotifier unmask
; /* eventfd for unmask on QEMU bypass */
79 PCIINTxRoute route
; /* routing info for QEMU bypass */
80 uint32_t mmap_timeout
; /* delay to re-enable mmaps after interrupt */
81 QEMUTimer
*mmap_timer
; /* enable mmaps after periods w/o interrupts */
84 typedef struct VFIOMSIVector
{
86 * Two interrupt paths are configured per vector. The first, is only used
87 * for interrupts injected via QEMU. This is typically the non-accel path,
88 * but may also be used when we want QEMU to handle masking and pending
89 * bits. The KVM path bypasses QEMU and is therefore higher performance,
90 * but requires masking at the device. virq is used to track the MSI route
91 * through KVM, thus kvm_interrupt is only available when virq is set to a
94 EventNotifier interrupt
;
95 EventNotifier kvm_interrupt
;
96 struct VFIOPCIDevice
*vdev
; /* back pointer to device */
108 /* Cache of MSI-X setup */
109 typedef struct VFIOMSIXInfo
{
113 uint32_t table_offset
;
115 unsigned long *pending
;
119 #define TYPE_VFIO_PCI "vfio-pci"
120 OBJECT_DECLARE_SIMPLE_TYPE(VFIOPCIDevice
, VFIO_PCI
)
122 struct VFIOPCIDevice
{
126 unsigned int config_size
;
127 uint8_t *emulated_config_bits
; /* QEMU emulated bits, little-endian */
128 off_t config_offset
; /* Offset of config space region within device fd */
129 unsigned int rom_size
;
130 off_t rom_offset
; /* Offset of ROM region within device fd */
133 VFIOMSIVector
*msi_vectors
;
135 int nr_vectors
; /* Number of MSI/MSIX vectors currently in use */
136 int interrupt
; /* Current interrupt type */
137 VFIOBAR bars
[PCI_NUM_REGIONS
- 1]; /* No ROM */
138 VFIOVGA
*vga
; /* 0xa0000, 0x3b0, 0x3c0 */
140 PCIHostDeviceAddress host
;
142 EventNotifier err_notifier
;
143 EventNotifier req_notifier
;
144 int (*resetfn
)(struct VFIOPCIDevice
*);
147 uint32_t sub_vendor_id
;
148 uint32_t sub_device_id
;
150 #define VFIO_FEATURE_ENABLE_VGA_BIT 0
151 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
152 #define VFIO_FEATURE_ENABLE_REQ_BIT 1
153 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
154 #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2
155 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \
156 (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT)
158 uint32_t display_xres
;
159 uint32_t display_yres
;
162 OffAutoPCIBAR msix_relo
;
164 uint8_t nv_gpudirect_clique
;
169 bool rom_read_failed
;
173 bool no_geforce_quirks
;
174 bool no_kvm_ioeventfd
;
175 bool no_vfio_ioeventfd
;
177 OnOffAuto ramfb_migrate
;
178 bool defer_kvm_irq_routing
;
179 bool clear_parent_atomics_on_exit
;
181 Notifier irqchip_change_notifier
;
184 /* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */
185 static inline bool vfio_pci_is(VFIOPCIDevice
*vdev
, uint32_t vendor
, uint32_t device
)
187 return (vendor
== PCI_ANY_ID
|| vendor
== vdev
->vendor_id
) &&
188 (device
== PCI_ANY_ID
|| device
== vdev
->device_id
);
191 static inline bool vfio_is_vga(VFIOPCIDevice
*vdev
)
193 PCIDevice
*pdev
= &vdev
->pdev
;
194 uint16_t class = pci_get_word(pdev
->config
+ PCI_CLASS_DEVICE
);
196 return class == PCI_CLASS_DISPLAY_VGA
;
199 uint32_t vfio_pci_read_config(PCIDevice
*pdev
, uint32_t addr
, int len
);
200 void vfio_pci_write_config(PCIDevice
*pdev
,
201 uint32_t addr
, uint32_t val
, int len
);
203 uint64_t vfio_vga_read(void *opaque
, hwaddr addr
, unsigned size
);
204 void vfio_vga_write(void *opaque
, hwaddr addr
, uint64_t data
, unsigned size
);
206 bool vfio_opt_rom_in_denylist(VFIOPCIDevice
*vdev
);
207 void vfio_vga_quirk_setup(VFIOPCIDevice
*vdev
);
208 void vfio_vga_quirk_exit(VFIOPCIDevice
*vdev
);
209 void vfio_vga_quirk_finalize(VFIOPCIDevice
*vdev
);
210 void vfio_bar_quirk_setup(VFIOPCIDevice
*vdev
, int nr
);
211 void vfio_bar_quirk_exit(VFIOPCIDevice
*vdev
, int nr
);
212 void vfio_bar_quirk_finalize(VFIOPCIDevice
*vdev
, int nr
);
213 void vfio_setup_resetfn_quirk(VFIOPCIDevice
*vdev
);
214 int vfio_add_virt_caps(VFIOPCIDevice
*vdev
, Error
**errp
);
215 void vfio_quirk_reset(VFIOPCIDevice
*vdev
);
216 VFIOQuirk
*vfio_quirk_alloc(int nr_mem
);
217 void vfio_probe_igd_bar4_quirk(VFIOPCIDevice
*vdev
, int nr
);
219 extern const PropertyInfo qdev_prop_nv_gpudirect_clique
;
221 void vfio_pci_pre_reset(VFIOPCIDevice
*vdev
);
222 void vfio_pci_post_reset(VFIOPCIDevice
*vdev
);
223 bool vfio_pci_host_match(PCIHostDeviceAddress
*addr
, const char *name
);
224 int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice
*vdev
,
225 struct vfio_pci_hot_reset_info
**info_p
);
227 int vfio_populate_vga(VFIOPCIDevice
*vdev
, Error
**errp
);
229 int vfio_pci_igd_opregion_init(VFIOPCIDevice
*vdev
,
230 struct vfio_region_info
*info
,
233 void vfio_display_reset(VFIOPCIDevice
*vdev
);
234 int vfio_display_probe(VFIOPCIDevice
*vdev
, Error
**errp
);
235 void vfio_display_finalize(VFIOPCIDevice
*vdev
);
237 extern const VMStateDescription vfio_display_vmstate
;
239 #endif /* HW_VFIO_VFIO_PCI_H */