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_device.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 #include "sysemu/kvm.h" 23 24 #define PCI_ANY_ID (~0) 25 26 struct VFIOPCIDevice; 27 28 typedef struct VFIOIOEventFD { 29 QLIST_ENTRY(VFIOIOEventFD) next; 30 MemoryRegion *mr; 31 hwaddr addr; 32 unsigned size; 33 uint64_t data; 34 EventNotifier e; 35 VFIORegion *region; 36 hwaddr region_addr; 37 bool dynamic; /* Added runtime, removed on device reset */ 38 bool vfio; 39 } VFIOIOEventFD; 40 41 typedef struct VFIOQuirk { 42 QLIST_ENTRY(VFIOQuirk) next; 43 void *data; 44 QLIST_HEAD(, VFIOIOEventFD) ioeventfds; 45 int nr_mem; 46 MemoryRegion *mem; 47 void (*reset)(struct VFIOPCIDevice *vdev, struct VFIOQuirk *quirk); 48 } VFIOQuirk; 49 50 typedef struct VFIOBAR { 51 VFIORegion region; 52 MemoryRegion *mr; 53 size_t size; 54 uint8_t type; 55 bool ioport; 56 bool mem64; 57 QLIST_HEAD(, VFIOQuirk) quirks; 58 } VFIOBAR; 59 60 typedef struct VFIOVGARegion { 61 MemoryRegion mem; 62 off_t offset; 63 int nr; 64 QLIST_HEAD(, VFIOQuirk) quirks; 65 } VFIOVGARegion; 66 67 typedef struct VFIOVGA { 68 off_t fd_offset; 69 int fd; 70 VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS]; 71 } VFIOVGA; 72 73 typedef struct VFIOINTx { 74 bool pending; /* interrupt pending */ 75 bool kvm_accel; /* set when QEMU bypass through KVM enabled */ 76 uint8_t pin; /* which pin to pull for qemu_set_irq */ 77 EventNotifier interrupt; /* eventfd triggered on interrupt */ 78 EventNotifier unmask; /* eventfd for unmask on QEMU bypass */ 79 PCIINTxRoute route; /* routing info for QEMU bypass */ 80 uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */ 81 QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */ 82 } VFIOINTx; 83 84 typedef struct VFIOMSIVector { 85 /* 86 * Two interrupt paths are configured per vector. The first, is only used 87 * for interrupts injected via QEMU. This is typically the non-accel path, 88 * but may also be used when we want QEMU to handle masking and pending 89 * bits. The KVM path bypasses QEMU and is therefore higher performance, 90 * but requires masking at the device. virq is used to track the MSI route 91 * through KVM, thus kvm_interrupt is only available when virq is set to a 92 * valid (>= 0) value. 93 */ 94 EventNotifier interrupt; 95 EventNotifier kvm_interrupt; 96 struct VFIOPCIDevice *vdev; /* back pointer to device */ 97 int virq; 98 bool use; 99 } VFIOMSIVector; 100 101 enum { 102 VFIO_INT_NONE = 0, 103 VFIO_INT_INTx = 1, 104 VFIO_INT_MSI = 2, 105 VFIO_INT_MSIX = 3, 106 }; 107 108 /* Cache of MSI-X setup */ 109 typedef struct VFIOMSIXInfo { 110 uint8_t table_bar; 111 uint8_t pba_bar; 112 uint16_t entries; 113 uint32_t table_offset; 114 uint32_t pba_offset; 115 unsigned long *pending; 116 bool noresize; 117 } VFIOMSIXInfo; 118 119 #define TYPE_VFIO_PCI "vfio-pci" 120 OBJECT_DECLARE_SIMPLE_TYPE(VFIOPCIDevice, VFIO_PCI) 121 122 struct VFIOPCIDevice { 123 PCIDevice pdev; 124 VFIODevice vbasedev; 125 VFIOINTx intx; 126 unsigned int config_size; 127 uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */ 128 off_t config_offset; /* Offset of config space region within device fd */ 129 unsigned int rom_size; 130 off_t rom_offset; /* Offset of ROM region within device fd */ 131 void *rom; 132 int msi_cap_size; 133 VFIOMSIVector *msi_vectors; 134 VFIOMSIXInfo *msix; 135 int nr_vectors; /* Number of MSI/MSIX vectors currently in use */ 136 int interrupt; /* Current interrupt type */ 137 VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */ 138 VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */ 139 void *igd_opregion; 140 PCIHostDeviceAddress host; 141 QemuUUID vf_token; 142 EventNotifier err_notifier; 143 EventNotifier req_notifier; 144 int (*resetfn)(struct VFIOPCIDevice *); 145 uint32_t vendor_id; 146 uint32_t device_id; 147 uint32_t sub_vendor_id; 148 uint32_t sub_device_id; 149 uint32_t features; 150 #define VFIO_FEATURE_ENABLE_VGA_BIT 0 151 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) 152 #define VFIO_FEATURE_ENABLE_REQ_BIT 1 153 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT) 154 #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2 155 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \ 156 (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT) 157 OnOffAuto display; 158 uint32_t display_xres; 159 uint32_t display_yres; 160 int32_t bootindex; 161 uint32_t igd_gms; 162 OffAutoPCIBAR msix_relo; 163 uint8_t pm_cap; 164 uint8_t nv_gpudirect_clique; 165 bool pci_aer; 166 bool req_enabled; 167 bool has_flr; 168 bool has_pm_reset; 169 bool rom_read_failed; 170 bool no_kvm_intx; 171 bool no_kvm_msi; 172 bool no_kvm_msix; 173 bool no_geforce_quirks; 174 bool no_kvm_ioeventfd; 175 bool no_vfio_ioeventfd; 176 bool enable_ramfb; 177 OnOffAuto ramfb_migrate; 178 bool defer_kvm_irq_routing; 179 bool clear_parent_atomics_on_exit; 180 VFIODisplay *dpy; 181 Notifier irqchip_change_notifier; 182 }; 183 184 /* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */ 185 static inline bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device) 186 { 187 return (vendor == PCI_ANY_ID || vendor == vdev->vendor_id) && 188 (device == PCI_ANY_ID || device == vdev->device_id); 189 } 190 191 static inline bool vfio_is_vga(VFIOPCIDevice *vdev) 192 { 193 PCIDevice *pdev = &vdev->pdev; 194 uint16_t class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 195 196 return class == PCI_CLASS_DISPLAY_VGA; 197 } 198 199 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); 200 void vfio_pci_write_config(PCIDevice *pdev, 201 uint32_t addr, uint32_t val, int len); 202 203 uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); 204 void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); 205 206 bool vfio_opt_rom_in_denylist(VFIOPCIDevice *vdev); 207 void vfio_vga_quirk_setup(VFIOPCIDevice *vdev); 208 void vfio_vga_quirk_exit(VFIOPCIDevice *vdev); 209 void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev); 210 void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); 211 void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr); 212 void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr); 213 void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev); 214 int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp); 215 void vfio_quirk_reset(VFIOPCIDevice *vdev); 216 VFIOQuirk *vfio_quirk_alloc(int nr_mem); 217 void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr); 218 219 extern const PropertyInfo qdev_prop_nv_gpudirect_clique; 220 221 void vfio_pci_pre_reset(VFIOPCIDevice *vdev); 222 void vfio_pci_post_reset(VFIOPCIDevice *vdev); 223 bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name); 224 int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev, 225 struct vfio_pci_hot_reset_info **info_p); 226 227 int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); 228 229 int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, 230 struct vfio_region_info *info, 231 Error **errp); 232 233 void vfio_display_reset(VFIOPCIDevice *vdev); 234 int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); 235 void vfio_display_finalize(VFIOPCIDevice *vdev); 236 237 extern const VMStateDescription vfio_display_vmstate; 238 239 #endif /* HW_VFIO_VFIO_PCI_H */ 240