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 VFIOIOEventFD { 28 QLIST_ENTRY(VFIOIOEventFD) next; 29 MemoryRegion *mr; 30 hwaddr addr; 31 unsigned size; 32 uint64_t data; 33 EventNotifier e; 34 VFIORegion *region; 35 hwaddr region_addr; 36 bool dynamic; /* Added runtime, removed on device reset */ 37 bool vfio; 38 } VFIOIOEventFD; 39 40 typedef struct VFIOQuirk { 41 QLIST_ENTRY(VFIOQuirk) next; 42 void *data; 43 QLIST_HEAD(, VFIOIOEventFD) ioeventfds; 44 int nr_mem; 45 MemoryRegion *mem; 46 void (*reset)(struct VFIOPCIDevice *vdev, struct VFIOQuirk *quirk); 47 } VFIOQuirk; 48 49 typedef struct VFIOBAR { 50 VFIORegion region; 51 MemoryRegion *mr; 52 size_t size; 53 uint8_t type; 54 bool ioport; 55 bool mem64; 56 QLIST_HEAD(, VFIOQuirk) quirks; 57 } VFIOBAR; 58 59 typedef struct VFIOVGARegion { 60 MemoryRegion mem; 61 off_t offset; 62 int nr; 63 QLIST_HEAD(, VFIOQuirk) quirks; 64 } VFIOVGARegion; 65 66 typedef struct VFIOVGA { 67 off_t fd_offset; 68 int fd; 69 VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS]; 70 } VFIOVGA; 71 72 typedef struct VFIOINTx { 73 bool pending; /* interrupt pending */ 74 bool kvm_accel; /* set when QEMU bypass through KVM enabled */ 75 uint8_t pin; /* which pin to pull for qemu_set_irq */ 76 EventNotifier interrupt; /* eventfd triggered on interrupt */ 77 EventNotifier unmask; /* eventfd for unmask on QEMU bypass */ 78 PCIINTxRoute route; /* routing info for QEMU bypass */ 79 uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ 80 QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */ 81 } VFIOINTx; 82 83 typedef struct VFIOMSIVector { 84 /* 85 * Two interrupt paths are configured per vector. The first, is only used 86 * for interrupts injected via QEMU. This is typically the non-accel path, 87 * but may also be used when we want QEMU to handle masking and pending 88 * bits. The KVM path bypasses QEMU and is therefore higher performance, 89 * but requires masking at the device. virq is used to track the MSI route 90 * through KVM, thus kvm_interrupt is only available when virq is set to a 91 * valid (>= 0) value. 92 */ 93 EventNotifier interrupt; 94 EventNotifier kvm_interrupt; 95 struct VFIOPCIDevice *vdev; /* back pointer to device */ 96 int virq; 97 bool use; 98 } VFIOMSIVector; 99 100 enum { 101 VFIO_INT_NONE = 0, 102 VFIO_INT_INTx = 1, 103 VFIO_INT_MSI = 2, 104 VFIO_INT_MSIX = 3, 105 }; 106 107 /* Cache of MSI-X setup */ 108 typedef struct VFIOMSIXInfo { 109 uint8_t table_bar; 110 uint8_t pba_bar; 111 uint16_t entries; 112 uint32_t table_offset; 113 uint32_t pba_offset; 114 unsigned long *pending; 115 } VFIOMSIXInfo; 116 117 typedef struct VFIOPCIDevice { 118 PCIDevice pdev; 119 VFIODevice vbasedev; 120 VFIOINTx intx; 121 unsigned int config_size; 122 uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */ 123 off_t config_offset; /* Offset of config space region within device fd */ 124 unsigned int rom_size; 125 off_t rom_offset; /* Offset of ROM region within device fd */ 126 void *rom; 127 int msi_cap_size; 128 VFIOMSIVector *msi_vectors; 129 VFIOMSIXInfo *msix; 130 int nr_vectors; /* Number of MSI/MSIX vectors currently in use */ 131 int interrupt; /* Current interrupt type */ 132 VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */ 133 VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */ 134 void *igd_opregion; 135 PCIHostDeviceAddress host; 136 EventNotifier err_notifier; 137 EventNotifier req_notifier; 138 int (*resetfn)(struct VFIOPCIDevice *); 139 uint32_t vendor_id; 140 uint32_t device_id; 141 uint32_t sub_vendor_id; 142 uint32_t sub_device_id; 143 uint32_t features; 144 #define VFIO_FEATURE_ENABLE_VGA_BIT 0 145 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) 146 #define VFIO_FEATURE_ENABLE_REQ_BIT 1 147 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT) 148 #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2 149 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \ 150 (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT) 151 OnOffAuto display; 152 int32_t bootindex; 153 uint32_t igd_gms; 154 OffAutoPCIBAR msix_relo; 155 uint8_t pm_cap; 156 uint8_t nv_gpudirect_clique; 157 bool pci_aer; 158 bool req_enabled; 159 bool has_flr; 160 bool has_pm_reset; 161 bool rom_read_failed; 162 bool no_kvm_intx; 163 bool no_kvm_msi; 164 bool no_kvm_msix; 165 bool no_geforce_quirks; 166 bool no_kvm_ioeventfd; 167 bool no_vfio_ioeventfd; 168 bool enable_ramfb; 169 VFIODisplay *dpy; 170 } VFIOPCIDevice; 171 172 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); 173 void vfio_pci_write_config(PCIDevice *pdev, 174 uint32_t addr, uint32_t val, int len); 175 176 uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); 177 void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); 178 179 bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev); 180 void vfio_vga_quirk_setup(VFIOPCIDevice *vdev); 181 void vfio_vga_quirk_exit(VFIOPCIDevice *vdev); 182 void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev); 183 void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); 184 void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr); 185 void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr); 186 void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev); 187 int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp); 188 void vfio_quirk_reset(VFIOPCIDevice *vdev); 189 190 extern const PropertyInfo qdev_prop_nv_gpudirect_clique; 191 192 int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); 193 194 int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, 195 struct vfio_region_info *info, 196 Error **errp); 197 198 void vfio_display_reset(VFIOPCIDevice *vdev); 199 int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); 200 void vfio_display_finalize(VFIOPCIDevice *vdev); 201 202 #endif /* HW_VFIO_VFIO_PCI_H */ 203