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 "exec/memory.h" 16 #include "hw/pci/pci.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 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 #define TYPE_VFIO_PCI "vfio-pci" 118 OBJECT_DECLARE_SIMPLE_TYPE(VFIOPCIDevice, VFIO_PCI) 119 120 struct VFIOPCIDevice { 121 PCIDevice pdev; 122 VFIODevice vbasedev; 123 VFIOINTx intx; 124 unsigned int config_size; 125 uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */ 126 off_t config_offset; /* Offset of config space region within device fd */ 127 unsigned int rom_size; 128 off_t rom_offset; /* Offset of ROM region within device fd */ 129 void *rom; 130 int msi_cap_size; 131 VFIOMSIVector *msi_vectors; 132 VFIOMSIXInfo *msix; 133 int nr_vectors; /* Number of MSI/MSIX vectors currently in use */ 134 int interrupt; /* Current interrupt type */ 135 VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */ 136 VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */ 137 void *igd_opregion; 138 PCIHostDeviceAddress host; 139 EventNotifier err_notifier; 140 EventNotifier req_notifier; 141 int (*resetfn)(struct VFIOPCIDevice *); 142 uint32_t vendor_id; 143 uint32_t device_id; 144 uint32_t sub_vendor_id; 145 uint32_t sub_device_id; 146 uint32_t features; 147 #define VFIO_FEATURE_ENABLE_VGA_BIT 0 148 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) 149 #define VFIO_FEATURE_ENABLE_REQ_BIT 1 150 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT) 151 #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2 152 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \ 153 (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT) 154 OnOffAuto display; 155 uint32_t display_xres; 156 uint32_t display_yres; 157 int32_t bootindex; 158 uint32_t igd_gms; 159 OffAutoPCIBAR msix_relo; 160 uint8_t pm_cap; 161 uint8_t nv_gpudirect_clique; 162 bool pci_aer; 163 bool req_enabled; 164 bool has_flr; 165 bool has_pm_reset; 166 bool rom_read_failed; 167 bool no_kvm_intx; 168 bool no_kvm_msi; 169 bool no_kvm_msix; 170 bool no_geforce_quirks; 171 bool no_kvm_ioeventfd; 172 bool no_vfio_ioeventfd; 173 bool enable_ramfb; 174 VFIODisplay *dpy; 175 Notifier irqchip_change_notifier; 176 }; 177 178 /* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */ 179 static inline bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device) 180 { 181 return (vendor == PCI_ANY_ID || vendor == vdev->vendor_id) && 182 (device == PCI_ANY_ID || device == vdev->device_id); 183 } 184 185 static inline bool vfio_is_vga(VFIOPCIDevice *vdev) 186 { 187 PCIDevice *pdev = &vdev->pdev; 188 uint16_t class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 189 190 return class == PCI_CLASS_DISPLAY_VGA; 191 } 192 193 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); 194 void vfio_pci_write_config(PCIDevice *pdev, 195 uint32_t addr, uint32_t val, int len); 196 197 uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); 198 void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); 199 200 bool vfio_opt_rom_in_denylist(VFIOPCIDevice *vdev); 201 void vfio_vga_quirk_setup(VFIOPCIDevice *vdev); 202 void vfio_vga_quirk_exit(VFIOPCIDevice *vdev); 203 void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev); 204 void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); 205 void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr); 206 void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr); 207 void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev); 208 int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp); 209 void vfio_quirk_reset(VFIOPCIDevice *vdev); 210 VFIOQuirk *vfio_quirk_alloc(int nr_mem); 211 void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr); 212 213 extern const PropertyInfo qdev_prop_nv_gpudirect_clique; 214 215 int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); 216 217 int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, 218 struct vfio_region_info *info, 219 Error **errp); 220 int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp); 221 int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp); 222 223 void vfio_display_reset(VFIOPCIDevice *vdev); 224 int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); 225 void vfio_display_finalize(VFIOPCIDevice *vdev); 226 227 #endif /* HW_VFIO_VFIO_PCI_H */ 228