diff options
Diffstat (limited to 'qemu/hw/vfio/pci.h')
| -rw-r--r-- | qemu/hw/vfio/pci.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/qemu/hw/vfio/pci.h b/qemu/hw/vfio/pci.h new file mode 100644 index 000000000..3976f6854 --- /dev/null +++ b/qemu/hw/vfio/pci.h @@ -0,0 +1,162 @@ +/* + * vfio based device assignment support - PCI devices + * + * Copyright Red Hat, Inc. 2012-2015 + * + * Authors: + * Alex Williamson <alex.williamson@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ +#ifndef HW_VFIO_VFIO_PCI_H +#define HW_VFIO_VFIO_PCI_H + +#include "qemu-common.h" +#include "exec/memory.h" +#include "hw/pci/pci.h" +#include "hw/vfio/vfio-common.h" +#include "qemu/event_notifier.h" +#include "qemu/queue.h" +#include "qemu/timer.h" + +#define PCI_ANY_ID (~0) + +struct VFIOPCIDevice; + +typedef struct VFIOQuirk { + QLIST_ENTRY(VFIOQuirk) next; + void *data; + int nr_mem; + MemoryRegion *mem; +} VFIOQuirk; + +typedef struct VFIOBAR { + VFIORegion region; + bool ioport; + bool mem64; + QLIST_HEAD(, VFIOQuirk) quirks; +} VFIOBAR; + +typedef struct VFIOVGARegion { + MemoryRegion mem; + off_t offset; + int nr; + QLIST_HEAD(, VFIOQuirk) quirks; +} VFIOVGARegion; + +typedef struct VFIOVGA { + off_t fd_offset; + int fd; + VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS]; +} VFIOVGA; + +typedef struct VFIOINTx { + bool pending; /* interrupt pending */ + bool kvm_accel; /* set when QEMU bypass through KVM enabled */ + uint8_t pin; /* which pin to pull for qemu_set_irq */ + EventNotifier interrupt; /* eventfd triggered on interrupt */ + EventNotifier unmask; /* eventfd for unmask on QEMU bypass */ + PCIINTxRoute route; /* routing info for QEMU bypass */ + uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ + QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */ +} VFIOINTx; + +typedef struct VFIOMSIVector { + /* + * Two interrupt paths are configured per vector. The first, is only used + * for interrupts injected via QEMU. This is typically the non-accel path, + * but may also be used when we want QEMU to handle masking and pending + * bits. The KVM path bypasses QEMU and is therefore higher performance, + * but requires masking at the device. virq is used to track the MSI route + * through KVM, thus kvm_interrupt is only available when virq is set to a + * valid (>= 0) value. + */ + EventNotifier interrupt; + EventNotifier kvm_interrupt; + struct VFIOPCIDevice *vdev; /* back pointer to device */ + int virq; + bool use; +} VFIOMSIVector; + +enum { + VFIO_INT_NONE = 0, + VFIO_INT_INTx = 1, + VFIO_INT_MSI = 2, + VFIO_INT_MSIX = 3, +}; + +/* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */ +typedef struct VFIOMSIXInfo { + uint8_t table_bar; + uint8_t pba_bar; + uint16_t entries; + uint32_t table_offset; + uint32_t pba_offset; + MemoryRegion mmap_mem; + void *mmap; + unsigned long *pending; +} VFIOMSIXInfo; + +typedef struct VFIOPCIDevice { + PCIDevice pdev; + VFIODevice vbasedev; + VFIOINTx intx; + unsigned int config_size; + uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */ + off_t config_offset; /* Offset of config space region within device fd */ + unsigned int rom_size; + off_t rom_offset; /* Offset of ROM region within device fd */ + void *rom; + int msi_cap_size; + VFIOMSIVector *msi_vectors; + VFIOMSIXInfo *msix; + int nr_vectors; /* Number of MSI/MSIX vectors currently in use */ + int interrupt; /* Current interrupt type */ + VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */ + VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */ + PCIHostDeviceAddress host; + EventNotifier err_notifier; + EventNotifier req_notifier; + int (*resetfn)(struct VFIOPCIDevice *); + uint32_t vendor_id; + uint32_t device_id; + uint32_t sub_vendor_id; + uint32_t sub_device_id; + uint32_t features; +#define VFIO_FEATURE_ENABLE_VGA_BIT 0 +#define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) +#define VFIO_FEATURE_ENABLE_REQ_BIT 1 +#define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT) + int32_t bootindex; + uint8_t pm_cap; + bool has_vga; + bool pci_aer; + bool req_enabled; + bool has_flr; + bool has_pm_reset; + bool rom_read_failed; + bool no_kvm_intx; + bool no_kvm_msi; + bool no_kvm_msix; +} VFIOPCIDevice; + +uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); +void vfio_pci_write_config(PCIDevice *pdev, + uint32_t addr, uint32_t val, int len); + +uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); +void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); + +bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev); +void vfio_vga_quirk_setup(VFIOPCIDevice *vdev); +void vfio_vga_quirk_exit(VFIOPCIDevice *vdev); +void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev); +void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); +void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr); +void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr); +void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev); + +int vfio_populate_vga(VFIOPCIDevice *vdev); + +#endif /* HW_VFIO_VFIO_PCI_H */ |