/* * 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 */ void *igd_opregion; 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) #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \ (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT) int32_t bootindex; uint32_t igd_gms; uint8_t pm_cap; 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, Error **errp); int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, struct vfio_region_info *info, Error **errp); #endif /* HW_VFIO_VFIO_PCI_H */