1 /* 2 * vfio based device assignment support - PCI devices 3 * 4 * Copyright Red Hat, Inc. 2012-2015 5 * 6 * Authors: 7 * Alex Williamson <alex.williamson@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 */ 12 #ifndef HW_VFIO_VFIO_PCI_H 13 #define HW_VFIO_VFIO_PCI_H 14 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" 22 23 #define PCI_ANY_ID (~0) 24 25 struct VFIOPCIDevice; 26 27 typedef struct VFIOQuirk { 28 QLIST_ENTRY(VFIOQuirk) next; 29 void *data; 30 int nr_mem; 31 MemoryRegion *mem; 32 } VFIOQuirk; 33 34 typedef struct VFIOBAR { 35 VFIORegion region; 36 MemoryRegion *mr; 37 size_t size; 38 uint8_t type; 39 bool ioport; 40 bool mem64; 41 QLIST_HEAD(, VFIOQuirk) quirks; 42 } VFIOBAR; 43 44 typedef struct VFIOVGARegion { 45 MemoryRegion mem; 46 off_t offset; 47 int nr; 48 QLIST_HEAD(, VFIOQuirk) quirks; 49 } VFIOVGARegion; 50 51 typedef struct VFIOVGA { 52 off_t fd_offset; 53 int fd; 54 VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS]; 55 } VFIOVGA; 56 57 typedef struct VFIOINTx { 58 bool pending; /* interrupt pending */ 59 bool kvm_accel; /* set when QEMU bypass through KVM enabled */ 60 uint8_t pin; /* which pin to pull for qemu_set_irq */ 61 EventNotifier interrupt; /* eventfd triggered on interrupt */ 62 EventNotifier unmask; /* eventfd for unmask on QEMU bypass */ 63 PCIINTxRoute route; /* routing info for QEMU bypass */ 64 uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ 65 QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */ 66 } VFIOINTx; 67 68 typedef struct VFIOMSIVector { 69 /* 70 * Two interrupt paths are configured per vector. The first, is only used 71 * for interrupts injected via QEMU. This is typically the non-accel path, 72 * but may also be used when we want QEMU to handle masking and pending 73 * bits. The KVM path bypasses QEMU and is therefore higher performance, 74 * but requires masking at the device. virq is used to track the MSI route 75 * through KVM, thus kvm_interrupt is only available when virq is set to a 76 * valid (>= 0) value. 77 */ 78 EventNotifier interrupt; 79 EventNotifier kvm_interrupt; 80 struct VFIOPCIDevice *vdev; /* back pointer to device */ 81 int virq; 82 bool use; 83 } VFIOMSIVector; 84 85 enum { 86 VFIO_INT_NONE = 0, 87 VFIO_INT_INTx = 1, 88 VFIO_INT_MSI = 2, 89 VFIO_INT_MSIX = 3, 90 }; 91 92 /* Cache of MSI-X setup */ 93 typedef struct VFIOMSIXInfo { 94 uint8_t table_bar; 95 uint8_t pba_bar; 96 uint16_t entries; 97 uint32_t table_offset; 98 uint32_t pba_offset; 99 unsigned long *pending; 100 } VFIOMSIXInfo; 101 102 typedef struct VFIOPCIDevice { 103 PCIDevice pdev; 104 VFIODevice vbasedev; 105 VFIOINTx intx; 106 unsigned int config_size; 107 uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */ 108 off_t config_offset; /* Offset of config space region within device fd */ 109 unsigned int rom_size; 110 off_t rom_offset; /* Offset of ROM region within device fd */ 111 void *rom; 112 int msi_cap_size; 113 VFIOMSIVector *msi_vectors; 114 VFIOMSIXInfo *msix; 115 int nr_vectors; /* Number of MSI/MSIX vectors currently in use */ 116 int interrupt; /* Current interrupt type */ 117 VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */ 118 VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */ 119 void *igd_opregion; 120 PCIHostDeviceAddress host; 121 EventNotifier err_notifier; 122 EventNotifier req_notifier; 123 int (*resetfn)(struct VFIOPCIDevice *); 124 uint32_t vendor_id; 125 uint32_t device_id; 126 uint32_t sub_vendor_id; 127 uint32_t sub_device_id; 128 uint32_t features; 129 #define VFIO_FEATURE_ENABLE_VGA_BIT 0 130 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) 131 #define VFIO_FEATURE_ENABLE_REQ_BIT 1 132 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT) 133 #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2 134 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \ 135 (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT) 136 OnOffAuto display; 137 int32_t bootindex; 138 uint32_t igd_gms; 139 OffAutoPCIBAR msix_relo; 140 uint8_t pm_cap; 141 uint8_t nv_gpudirect_clique; 142 bool pci_aer; 143 bool req_enabled; 144 bool has_flr; 145 bool has_pm_reset; 146 bool rom_read_failed; 147 bool no_kvm_intx; 148 bool no_kvm_msi; 149 bool no_kvm_msix; 150 bool no_geforce_quirks; 151 VFIODisplay *dpy; 152 } VFIOPCIDevice; 153 154 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); 155 void vfio_pci_write_config(PCIDevice *pdev, 156 uint32_t addr, uint32_t val, int len); 157 158 uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); 159 void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); 160 161 bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev); 162 void vfio_vga_quirk_setup(VFIOPCIDevice *vdev); 163 void vfio_vga_quirk_exit(VFIOPCIDevice *vdev); 164 void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev); 165 void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); 166 void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr); 167 void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr); 168 void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev); 169 int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp); 170 171 extern const PropertyInfo qdev_prop_nv_gpudirect_clique; 172 173 int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); 174 175 int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, 176 struct vfio_region_info *info, 177 Error **errp); 178 179 int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); 180 void vfio_display_finalize(VFIOPCIDevice *vdev); 181 182 #endif /* HW_VFIO_VFIO_PCI_H */ 183