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 typedef struct VFIOPCIDevice VFIOPCIDevice; 119 DECLARE_INSTANCE_CHECKER(VFIOPCIDevice, VFIO_PCI, 120 TYPE_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 EventNotifier err_notifier; 142 EventNotifier req_notifier; 143 int (*resetfn)(struct VFIOPCIDevice *); 144 uint32_t vendor_id; 145 uint32_t device_id; 146 uint32_t sub_vendor_id; 147 uint32_t sub_device_id; 148 uint32_t features; 149 #define VFIO_FEATURE_ENABLE_VGA_BIT 0 150 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) 151 #define VFIO_FEATURE_ENABLE_REQ_BIT 1 152 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT) 153 #define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2 154 #define VFIO_FEATURE_ENABLE_IGD_OPREGION \ 155 (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT) 156 OnOffAuto display; 157 uint32_t display_xres; 158 uint32_t display_yres; 159 int32_t bootindex; 160 uint32_t igd_gms; 161 OffAutoPCIBAR msix_relo; 162 uint8_t pm_cap; 163 uint8_t nv_gpudirect_clique; 164 bool pci_aer; 165 bool req_enabled; 166 bool has_flr; 167 bool has_pm_reset; 168 bool rom_read_failed; 169 bool no_kvm_intx; 170 bool no_kvm_msi; 171 bool no_kvm_msix; 172 bool no_geforce_quirks; 173 bool no_kvm_ioeventfd; 174 bool no_vfio_ioeventfd; 175 bool enable_ramfb; 176 VFIODisplay *dpy; 177 Error *migration_blocker; 178 Notifier irqchip_change_notifier; 179 }; 180 181 /* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */ 182 static inline bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device) 183 { 184 return (vendor == PCI_ANY_ID || vendor == vdev->vendor_id) && 185 (device == PCI_ANY_ID || device == vdev->device_id); 186 } 187 188 static inline bool vfio_is_vga(VFIOPCIDevice *vdev) 189 { 190 PCIDevice *pdev = &vdev->pdev; 191 uint16_t class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 192 193 return class == PCI_CLASS_DISPLAY_VGA; 194 } 195 196 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); 197 void vfio_pci_write_config(PCIDevice *pdev, 198 uint32_t addr, uint32_t val, int len); 199 200 uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); 201 void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); 202 203 bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev); 204 void vfio_vga_quirk_setup(VFIOPCIDevice *vdev); 205 void vfio_vga_quirk_exit(VFIOPCIDevice *vdev); 206 void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev); 207 void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); 208 void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr); 209 void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr); 210 void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev); 211 int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp); 212 void vfio_quirk_reset(VFIOPCIDevice *vdev); 213 VFIOQuirk *vfio_quirk_alloc(int nr_mem); 214 void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr); 215 216 extern const PropertyInfo qdev_prop_nv_gpudirect_clique; 217 218 int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); 219 220 int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, 221 struct vfio_region_info *info, 222 Error **errp); 223 int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp); 224 int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp); 225 226 void vfio_display_reset(VFIOPCIDevice *vdev); 227 int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); 228 void vfio_display_finalize(VFIOPCIDevice *vdev); 229 230 #endif /* HW_VFIO_VFIO_PCI_H */ 231