root / hw / vfio_pci.c @ 9c17d615
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1 | 65501a74 | Alex Williamson | /*
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2 | 65501a74 | Alex Williamson | * vfio based device assignment support
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3 | 65501a74 | Alex Williamson | *
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4 | 65501a74 | Alex Williamson | * Copyright Red Hat, Inc. 2012
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5 | 65501a74 | Alex Williamson | *
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6 | 65501a74 | Alex Williamson | * Authors:
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7 | 65501a74 | Alex Williamson | * Alex Williamson <alex.williamson@redhat.com>
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8 | 65501a74 | Alex Williamson | *
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9 | 65501a74 | Alex Williamson | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | 65501a74 | Alex Williamson | * the COPYING file in the top-level directory.
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11 | 65501a74 | Alex Williamson | *
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12 | 65501a74 | Alex Williamson | * Based on qemu-kvm device-assignment:
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13 | 65501a74 | Alex Williamson | * Adapted for KVM by Qumranet.
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14 | 65501a74 | Alex Williamson | * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
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15 | 65501a74 | Alex Williamson | * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
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16 | 65501a74 | Alex Williamson | * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
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17 | 65501a74 | Alex Williamson | * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
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18 | 65501a74 | Alex Williamson | * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
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19 | 65501a74 | Alex Williamson | */
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20 | 65501a74 | Alex Williamson | |
21 | 65501a74 | Alex Williamson | #include <dirent.h> |
22 | 65501a74 | Alex Williamson | #include <unistd.h> |
23 | 65501a74 | Alex Williamson | #include <sys/ioctl.h> |
24 | 65501a74 | Alex Williamson | #include <sys/mman.h> |
25 | 65501a74 | Alex Williamson | #include <sys/stat.h> |
26 | 65501a74 | Alex Williamson | #include <sys/types.h> |
27 | 65501a74 | Alex Williamson | #include <linux/vfio.h> |
28 | 65501a74 | Alex Williamson | |
29 | 65501a74 | Alex Williamson | #include "config.h" |
30 | 1de7afc9 | Paolo Bonzini | #include "qemu/event_notifier.h" |
31 | 022c62cb | Paolo Bonzini | #include "exec/address-spaces.h" |
32 | 9c17d615 | Paolo Bonzini | #include "sysemu/kvm.h" |
33 | 022c62cb | Paolo Bonzini | #include "exec/memory.h" |
34 | a2cb15b0 | Michael S. Tsirkin | #include "pci/msi.h" |
35 | a2cb15b0 | Michael S. Tsirkin | #include "pci/msix.h" |
36 | a2cb15b0 | Michael S. Tsirkin | #include "pci/pci.h" |
37 | 5c97e5eb | Alex Williamson | #include "qemu-common.h" |
38 | 1de7afc9 | Paolo Bonzini | #include "qemu/error-report.h" |
39 | 1de7afc9 | Paolo Bonzini | #include "qemu/queue.h" |
40 | 1de7afc9 | Paolo Bonzini | #include "qemu/range.h" |
41 | 65501a74 | Alex Williamson | |
42 | 65501a74 | Alex Williamson | /* #define DEBUG_VFIO */
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43 | 65501a74 | Alex Williamson | #ifdef DEBUG_VFIO
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44 | 65501a74 | Alex Williamson | #define DPRINTF(fmt, ...) \
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45 | 65501a74 | Alex Williamson | do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0) |
46 | 65501a74 | Alex Williamson | #else
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47 | 65501a74 | Alex Williamson | #define DPRINTF(fmt, ...) \
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48 | 65501a74 | Alex Williamson | do { } while (0) |
49 | 65501a74 | Alex Williamson | #endif
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50 | 65501a74 | Alex Williamson | |
51 | 5c97e5eb | Alex Williamson | typedef struct VFIOBAR { |
52 | 5c97e5eb | Alex Williamson | off_t fd_offset; /* offset of BAR within device fd */
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53 | 5c97e5eb | Alex Williamson | int fd; /* device fd, allows us to pass VFIOBAR as opaque data */ |
54 | 5c97e5eb | Alex Williamson | MemoryRegion mem; /* slow, read/write access */
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55 | 5c97e5eb | Alex Williamson | MemoryRegion mmap_mem; /* direct mapped access */
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56 | 5c97e5eb | Alex Williamson | void *mmap;
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57 | 5c97e5eb | Alex Williamson | size_t size; |
58 | 5c97e5eb | Alex Williamson | uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
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59 | 5c97e5eb | Alex Williamson | uint8_t nr; /* cache the BAR number for debug */
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60 | 5c97e5eb | Alex Williamson | } VFIOBAR; |
61 | 5c97e5eb | Alex Williamson | |
62 | 5c97e5eb | Alex Williamson | typedef struct VFIOINTx { |
63 | 5c97e5eb | Alex Williamson | bool pending; /* interrupt pending */ |
64 | 5c97e5eb | Alex Williamson | bool kvm_accel; /* set when QEMU bypass through KVM enabled */ |
65 | 5c97e5eb | Alex Williamson | uint8_t pin; /* which pin to pull for qemu_set_irq */
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66 | 5c97e5eb | Alex Williamson | EventNotifier interrupt; /* eventfd triggered on interrupt */
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67 | 5c97e5eb | Alex Williamson | EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
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68 | 5c97e5eb | Alex Williamson | PCIINTxRoute route; /* routing info for QEMU bypass */
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69 | 5c97e5eb | Alex Williamson | uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
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70 | 5c97e5eb | Alex Williamson | QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
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71 | 5c97e5eb | Alex Williamson | } VFIOINTx; |
72 | 5c97e5eb | Alex Williamson | |
73 | 5c97e5eb | Alex Williamson | struct VFIODevice;
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74 | 5c97e5eb | Alex Williamson | |
75 | 5c97e5eb | Alex Williamson | typedef struct VFIOMSIVector { |
76 | 5c97e5eb | Alex Williamson | EventNotifier interrupt; /* eventfd triggered on interrupt */
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77 | 5c97e5eb | Alex Williamson | struct VFIODevice *vdev; /* back pointer to device */ |
78 | 5c97e5eb | Alex Williamson | int virq; /* KVM irqchip route for QEMU bypass */ |
79 | 5c97e5eb | Alex Williamson | bool use;
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80 | 5c97e5eb | Alex Williamson | } VFIOMSIVector; |
81 | 5c97e5eb | Alex Williamson | |
82 | 5c97e5eb | Alex Williamson | enum {
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83 | 5c97e5eb | Alex Williamson | VFIO_INT_NONE = 0,
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84 | 5c97e5eb | Alex Williamson | VFIO_INT_INTx = 1,
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85 | 5c97e5eb | Alex Williamson | VFIO_INT_MSI = 2,
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86 | 5c97e5eb | Alex Williamson | VFIO_INT_MSIX = 3,
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87 | 5c97e5eb | Alex Williamson | }; |
88 | 5c97e5eb | Alex Williamson | |
89 | 5c97e5eb | Alex Williamson | struct VFIOGroup;
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90 | 5c97e5eb | Alex Williamson | |
91 | 5c97e5eb | Alex Williamson | typedef struct VFIOContainer { |
92 | 5c97e5eb | Alex Williamson | int fd; /* /dev/vfio/vfio, empowered by the attached groups */ |
93 | 5c97e5eb | Alex Williamson | struct {
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94 | 5c97e5eb | Alex Williamson | /* enable abstraction to support various iommu backends */
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95 | 5c97e5eb | Alex Williamson | union {
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96 | 5c97e5eb | Alex Williamson | MemoryListener listener; /* Used by type1 iommu */
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97 | 5c97e5eb | Alex Williamson | }; |
98 | 5c97e5eb | Alex Williamson | void (*release)(struct VFIOContainer *); |
99 | 5c97e5eb | Alex Williamson | } iommu_data; |
100 | 5c97e5eb | Alex Williamson | QLIST_HEAD(, VFIOGroup) group_list; |
101 | 5c97e5eb | Alex Williamson | QLIST_ENTRY(VFIOContainer) next; |
102 | 5c97e5eb | Alex Williamson | } VFIOContainer; |
103 | 5c97e5eb | Alex Williamson | |
104 | 5c97e5eb | Alex Williamson | /* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
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105 | 5c97e5eb | Alex Williamson | typedef struct VFIOMSIXInfo { |
106 | 5c97e5eb | Alex Williamson | uint8_t table_bar; |
107 | 5c97e5eb | Alex Williamson | uint8_t pba_bar; |
108 | 5c97e5eb | Alex Williamson | uint16_t entries; |
109 | 5c97e5eb | Alex Williamson | uint32_t table_offset; |
110 | 5c97e5eb | Alex Williamson | uint32_t pba_offset; |
111 | 5c97e5eb | Alex Williamson | MemoryRegion mmap_mem; |
112 | 5c97e5eb | Alex Williamson | void *mmap;
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113 | 5c97e5eb | Alex Williamson | } VFIOMSIXInfo; |
114 | 5c97e5eb | Alex Williamson | |
115 | 5c97e5eb | Alex Williamson | typedef struct VFIODevice { |
116 | 5c97e5eb | Alex Williamson | PCIDevice pdev; |
117 | 5c97e5eb | Alex Williamson | int fd;
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118 | 5c97e5eb | Alex Williamson | VFIOINTx intx; |
119 | 5c97e5eb | Alex Williamson | unsigned int config_size; |
120 | 5c97e5eb | Alex Williamson | off_t config_offset; /* Offset of config space region within device fd */
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121 | 5c97e5eb | Alex Williamson | unsigned int rom_size; |
122 | 5c97e5eb | Alex Williamson | off_t rom_offset; /* Offset of ROM region within device fd */
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123 | 5c97e5eb | Alex Williamson | int msi_cap_size;
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124 | 5c97e5eb | Alex Williamson | VFIOMSIVector *msi_vectors; |
125 | 5c97e5eb | Alex Williamson | VFIOMSIXInfo *msix; |
126 | 5c97e5eb | Alex Williamson | int nr_vectors; /* Number of MSI/MSIX vectors currently in use */ |
127 | 5c97e5eb | Alex Williamson | int interrupt; /* Current interrupt type */ |
128 | 5c97e5eb | Alex Williamson | VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */ |
129 | 5c97e5eb | Alex Williamson | PCIHostDeviceAddress host; |
130 | 5c97e5eb | Alex Williamson | QLIST_ENTRY(VFIODevice) next; |
131 | 5c97e5eb | Alex Williamson | struct VFIOGroup *group;
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132 | 5c97e5eb | Alex Williamson | bool reset_works;
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133 | 5c97e5eb | Alex Williamson | } VFIODevice; |
134 | 5c97e5eb | Alex Williamson | |
135 | 5c97e5eb | Alex Williamson | typedef struct VFIOGroup { |
136 | 5c97e5eb | Alex Williamson | int fd;
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137 | 5c97e5eb | Alex Williamson | int groupid;
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138 | 5c97e5eb | Alex Williamson | VFIOContainer *container; |
139 | 5c97e5eb | Alex Williamson | QLIST_HEAD(, VFIODevice) device_list; |
140 | 5c97e5eb | Alex Williamson | QLIST_ENTRY(VFIOGroup) next; |
141 | 5c97e5eb | Alex Williamson | QLIST_ENTRY(VFIOGroup) container_next; |
142 | 5c97e5eb | Alex Williamson | } VFIOGroup; |
143 | 5c97e5eb | Alex Williamson | |
144 | 65501a74 | Alex Williamson | #define MSIX_CAP_LENGTH 12 |
145 | 65501a74 | Alex Williamson | |
146 | 65501a74 | Alex Williamson | static QLIST_HEAD(, VFIOContainer)
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147 | 65501a74 | Alex Williamson | container_list = QLIST_HEAD_INITIALIZER(container_list); |
148 | 65501a74 | Alex Williamson | |
149 | 65501a74 | Alex Williamson | static QLIST_HEAD(, VFIOGroup)
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150 | 65501a74 | Alex Williamson | group_list = QLIST_HEAD_INITIALIZER(group_list); |
151 | 65501a74 | Alex Williamson | |
152 | 65501a74 | Alex Williamson | static void vfio_disable_interrupts(VFIODevice *vdev); |
153 | 65501a74 | Alex Williamson | static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len); |
154 | 65501a74 | Alex Williamson | static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled); |
155 | 65501a74 | Alex Williamson | |
156 | 65501a74 | Alex Williamson | /*
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157 | 65501a74 | Alex Williamson | * Common VFIO interrupt disable
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158 | 65501a74 | Alex Williamson | */
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159 | 65501a74 | Alex Williamson | static void vfio_disable_irqindex(VFIODevice *vdev, int index) |
160 | 65501a74 | Alex Williamson | { |
161 | 65501a74 | Alex Williamson | struct vfio_irq_set irq_set = {
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162 | 65501a74 | Alex Williamson | .argsz = sizeof(irq_set),
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163 | 65501a74 | Alex Williamson | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER, |
164 | 65501a74 | Alex Williamson | .index = index, |
165 | 65501a74 | Alex Williamson | .start = 0,
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166 | 65501a74 | Alex Williamson | .count = 0,
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167 | 65501a74 | Alex Williamson | }; |
168 | 65501a74 | Alex Williamson | |
169 | 65501a74 | Alex Williamson | ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); |
170 | 65501a74 | Alex Williamson | } |
171 | 65501a74 | Alex Williamson | |
172 | 65501a74 | Alex Williamson | /*
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173 | 65501a74 | Alex Williamson | * INTx
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174 | 65501a74 | Alex Williamson | */
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175 | 65501a74 | Alex Williamson | static void vfio_unmask_intx(VFIODevice *vdev) |
176 | 65501a74 | Alex Williamson | { |
177 | 65501a74 | Alex Williamson | struct vfio_irq_set irq_set = {
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178 | 65501a74 | Alex Williamson | .argsz = sizeof(irq_set),
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179 | 65501a74 | Alex Williamson | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK, |
180 | 65501a74 | Alex Williamson | .index = VFIO_PCI_INTX_IRQ_INDEX, |
181 | 65501a74 | Alex Williamson | .start = 0,
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182 | 65501a74 | Alex Williamson | .count = 1,
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183 | 65501a74 | Alex Williamson | }; |
184 | 65501a74 | Alex Williamson | |
185 | 65501a74 | Alex Williamson | ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); |
186 | 65501a74 | Alex Williamson | } |
187 | 65501a74 | Alex Williamson | |
188 | e1d1e586 | Alex Williamson | #ifdef CONFIG_KVM /* Unused outside of CONFIG_KVM code */ |
189 | e1d1e586 | Alex Williamson | static void vfio_mask_intx(VFIODevice *vdev) |
190 | e1d1e586 | Alex Williamson | { |
191 | e1d1e586 | Alex Williamson | struct vfio_irq_set irq_set = {
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192 | e1d1e586 | Alex Williamson | .argsz = sizeof(irq_set),
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193 | e1d1e586 | Alex Williamson | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK, |
194 | e1d1e586 | Alex Williamson | .index = VFIO_PCI_INTX_IRQ_INDEX, |
195 | e1d1e586 | Alex Williamson | .start = 0,
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196 | e1d1e586 | Alex Williamson | .count = 1,
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197 | e1d1e586 | Alex Williamson | }; |
198 | e1d1e586 | Alex Williamson | |
199 | e1d1e586 | Alex Williamson | ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); |
200 | e1d1e586 | Alex Williamson | } |
201 | e1d1e586 | Alex Williamson | #endif
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202 | e1d1e586 | Alex Williamson | |
203 | ea486926 | Alex Williamson | /*
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204 | ea486926 | Alex Williamson | * Disabling BAR mmaping can be slow, but toggling it around INTx can
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205 | ea486926 | Alex Williamson | * also be a huge overhead. We try to get the best of both worlds by
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206 | ea486926 | Alex Williamson | * waiting until an interrupt to disable mmaps (subsequent transitions
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207 | ea486926 | Alex Williamson | * to the same state are effectively no overhead). If the interrupt has
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208 | ea486926 | Alex Williamson | * been serviced and the time gap is long enough, we re-enable mmaps for
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209 | ea486926 | Alex Williamson | * performance. This works well for things like graphics cards, which
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210 | ea486926 | Alex Williamson | * may not use their interrupt at all and are penalized to an unusable
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211 | ea486926 | Alex Williamson | * level by read/write BAR traps. Other devices, like NICs, have more
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212 | ea486926 | Alex Williamson | * regular interrupts and see much better latency by staying in non-mmap
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213 | ea486926 | Alex Williamson | * mode. We therefore set the default mmap_timeout such that a ping
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214 | ea486926 | Alex Williamson | * is just enough to keep the mmap disabled. Users can experiment with
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215 | ea486926 | Alex Williamson | * other options with the x-intx-mmap-timeout-ms parameter (a value of
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216 | ea486926 | Alex Williamson | * zero disables the timer).
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217 | ea486926 | Alex Williamson | */
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218 | ea486926 | Alex Williamson | static void vfio_intx_mmap_enable(void *opaque) |
219 | ea486926 | Alex Williamson | { |
220 | ea486926 | Alex Williamson | VFIODevice *vdev = opaque; |
221 | ea486926 | Alex Williamson | |
222 | ea486926 | Alex Williamson | if (vdev->intx.pending) {
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223 | ea486926 | Alex Williamson | qemu_mod_timer(vdev->intx.mmap_timer, |
224 | ea486926 | Alex Williamson | qemu_get_clock_ms(vm_clock) + vdev->intx.mmap_timeout); |
225 | ea486926 | Alex Williamson | return;
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226 | ea486926 | Alex Williamson | } |
227 | ea486926 | Alex Williamson | |
228 | ea486926 | Alex Williamson | vfio_mmap_set_enabled(vdev, true);
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229 | ea486926 | Alex Williamson | } |
230 | ea486926 | Alex Williamson | |
231 | 65501a74 | Alex Williamson | static void vfio_intx_interrupt(void *opaque) |
232 | 65501a74 | Alex Williamson | { |
233 | 65501a74 | Alex Williamson | VFIODevice *vdev = opaque; |
234 | 65501a74 | Alex Williamson | |
235 | 65501a74 | Alex Williamson | if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
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236 | 65501a74 | Alex Williamson | return;
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237 | 65501a74 | Alex Williamson | } |
238 | 65501a74 | Alex Williamson | |
239 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) Pin %c\n", __func__, vdev->host.domain,
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240 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function, |
241 | 65501a74 | Alex Williamson | 'A' + vdev->intx.pin);
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242 | 65501a74 | Alex Williamson | |
243 | 65501a74 | Alex Williamson | vdev->intx.pending = true;
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244 | 65501a74 | Alex Williamson | qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 1);
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245 | ea486926 | Alex Williamson | vfio_mmap_set_enabled(vdev, false);
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246 | ea486926 | Alex Williamson | if (vdev->intx.mmap_timeout) {
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247 | ea486926 | Alex Williamson | qemu_mod_timer(vdev->intx.mmap_timer, |
248 | ea486926 | Alex Williamson | qemu_get_clock_ms(vm_clock) + vdev->intx.mmap_timeout); |
249 | ea486926 | Alex Williamson | } |
250 | 65501a74 | Alex Williamson | } |
251 | 65501a74 | Alex Williamson | |
252 | 65501a74 | Alex Williamson | static void vfio_eoi(VFIODevice *vdev) |
253 | 65501a74 | Alex Williamson | { |
254 | 65501a74 | Alex Williamson | if (!vdev->intx.pending) {
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255 | 65501a74 | Alex Williamson | return;
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256 | 65501a74 | Alex Williamson | } |
257 | 65501a74 | Alex Williamson | |
258 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) EOI\n", __func__, vdev->host.domain,
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259 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
260 | 65501a74 | Alex Williamson | |
261 | 65501a74 | Alex Williamson | vdev->intx.pending = false;
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262 | 65501a74 | Alex Williamson | qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
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263 | 65501a74 | Alex Williamson | vfio_unmask_intx(vdev); |
264 | 65501a74 | Alex Williamson | } |
265 | 65501a74 | Alex Williamson | |
266 | e1d1e586 | Alex Williamson | static void vfio_enable_intx_kvm(VFIODevice *vdev) |
267 | e1d1e586 | Alex Williamson | { |
268 | e1d1e586 | Alex Williamson | #ifdef CONFIG_KVM
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269 | e1d1e586 | Alex Williamson | struct kvm_irqfd irqfd = {
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270 | e1d1e586 | Alex Williamson | .fd = event_notifier_get_fd(&vdev->intx.interrupt), |
271 | e1d1e586 | Alex Williamson | .gsi = vdev->intx.route.irq, |
272 | e1d1e586 | Alex Williamson | .flags = KVM_IRQFD_FLAG_RESAMPLE, |
273 | e1d1e586 | Alex Williamson | }; |
274 | e1d1e586 | Alex Williamson | struct vfio_irq_set *irq_set;
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275 | e1d1e586 | Alex Williamson | int ret, argsz;
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276 | e1d1e586 | Alex Williamson | int32_t *pfd; |
277 | e1d1e586 | Alex Williamson | |
278 | d281084d | Alex Williamson | if (!kvm_irqfds_enabled() ||
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279 | e1d1e586 | Alex Williamson | vdev->intx.route.mode != PCI_INTX_ENABLED || |
280 | e1d1e586 | Alex Williamson | !kvm_check_extension(kvm_state, KVM_CAP_IRQFD_RESAMPLE)) { |
281 | e1d1e586 | Alex Williamson | return;
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282 | e1d1e586 | Alex Williamson | } |
283 | e1d1e586 | Alex Williamson | |
284 | e1d1e586 | Alex Williamson | /* Get to a known interrupt state */
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285 | e1d1e586 | Alex Williamson | qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev); |
286 | e1d1e586 | Alex Williamson | vfio_mask_intx(vdev); |
287 | e1d1e586 | Alex Williamson | vdev->intx.pending = false;
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288 | e1d1e586 | Alex Williamson | qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
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289 | e1d1e586 | Alex Williamson | |
290 | e1d1e586 | Alex Williamson | /* Get an eventfd for resample/unmask */
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291 | e1d1e586 | Alex Williamson | if (event_notifier_init(&vdev->intx.unmask, 0)) { |
292 | e1d1e586 | Alex Williamson | error_report("vfio: Error: event_notifier_init failed eoi\n");
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293 | e1d1e586 | Alex Williamson | goto fail;
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294 | e1d1e586 | Alex Williamson | } |
295 | e1d1e586 | Alex Williamson | |
296 | e1d1e586 | Alex Williamson | /* KVM triggers it, VFIO listens for it */
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297 | e1d1e586 | Alex Williamson | irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask); |
298 | e1d1e586 | Alex Williamson | |
299 | e1d1e586 | Alex Williamson | if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
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300 | e1d1e586 | Alex Williamson | error_report("vfio: Error: Failed to setup resample irqfd: %m\n");
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301 | e1d1e586 | Alex Williamson | goto fail_irqfd;
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302 | e1d1e586 | Alex Williamson | } |
303 | e1d1e586 | Alex Williamson | |
304 | e1d1e586 | Alex Williamson | argsz = sizeof(*irq_set) + sizeof(*pfd); |
305 | e1d1e586 | Alex Williamson | |
306 | e1d1e586 | Alex Williamson | irq_set = g_malloc0(argsz); |
307 | e1d1e586 | Alex Williamson | irq_set->argsz = argsz; |
308 | e1d1e586 | Alex Williamson | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK; |
309 | e1d1e586 | Alex Williamson | irq_set->index = VFIO_PCI_INTX_IRQ_INDEX; |
310 | e1d1e586 | Alex Williamson | irq_set->start = 0;
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311 | e1d1e586 | Alex Williamson | irq_set->count = 1;
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312 | e1d1e586 | Alex Williamson | pfd = (int32_t *)&irq_set->data; |
313 | e1d1e586 | Alex Williamson | |
314 | e1d1e586 | Alex Williamson | *pfd = irqfd.resamplefd; |
315 | e1d1e586 | Alex Williamson | |
316 | e1d1e586 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
317 | e1d1e586 | Alex Williamson | g_free(irq_set); |
318 | e1d1e586 | Alex Williamson | if (ret) {
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319 | e1d1e586 | Alex Williamson | error_report("vfio: Error: Failed to setup INTx unmask fd: %m\n");
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320 | e1d1e586 | Alex Williamson | goto fail_vfio;
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321 | e1d1e586 | Alex Williamson | } |
322 | e1d1e586 | Alex Williamson | |
323 | e1d1e586 | Alex Williamson | /* Let'em rip */
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324 | e1d1e586 | Alex Williamson | vfio_unmask_intx(vdev); |
325 | e1d1e586 | Alex Williamson | |
326 | e1d1e586 | Alex Williamson | vdev->intx.kvm_accel = true;
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327 | e1d1e586 | Alex Williamson | |
328 | e1d1e586 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) KVM INTx accel enabled\n",
|
329 | e1d1e586 | Alex Williamson | __func__, vdev->host.domain, vdev->host.bus, |
330 | e1d1e586 | Alex Williamson | vdev->host.slot, vdev->host.function); |
331 | e1d1e586 | Alex Williamson | |
332 | e1d1e586 | Alex Williamson | return;
|
333 | e1d1e586 | Alex Williamson | |
334 | e1d1e586 | Alex Williamson | fail_vfio:
|
335 | e1d1e586 | Alex Williamson | irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN; |
336 | e1d1e586 | Alex Williamson | kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd); |
337 | e1d1e586 | Alex Williamson | fail_irqfd:
|
338 | e1d1e586 | Alex Williamson | event_notifier_cleanup(&vdev->intx.unmask); |
339 | e1d1e586 | Alex Williamson | fail:
|
340 | e1d1e586 | Alex Williamson | qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
|
341 | e1d1e586 | Alex Williamson | vfio_unmask_intx(vdev); |
342 | e1d1e586 | Alex Williamson | #endif
|
343 | e1d1e586 | Alex Williamson | } |
344 | e1d1e586 | Alex Williamson | |
345 | e1d1e586 | Alex Williamson | static void vfio_disable_intx_kvm(VFIODevice *vdev) |
346 | e1d1e586 | Alex Williamson | { |
347 | e1d1e586 | Alex Williamson | #ifdef CONFIG_KVM
|
348 | e1d1e586 | Alex Williamson | struct kvm_irqfd irqfd = {
|
349 | e1d1e586 | Alex Williamson | .fd = event_notifier_get_fd(&vdev->intx.interrupt), |
350 | e1d1e586 | Alex Williamson | .gsi = vdev->intx.route.irq, |
351 | e1d1e586 | Alex Williamson | .flags = KVM_IRQFD_FLAG_DEASSIGN, |
352 | e1d1e586 | Alex Williamson | }; |
353 | e1d1e586 | Alex Williamson | |
354 | e1d1e586 | Alex Williamson | if (!vdev->intx.kvm_accel) {
|
355 | e1d1e586 | Alex Williamson | return;
|
356 | e1d1e586 | Alex Williamson | } |
357 | e1d1e586 | Alex Williamson | |
358 | e1d1e586 | Alex Williamson | /*
|
359 | e1d1e586 | Alex Williamson | * Get to a known state, hardware masked, QEMU ready to accept new
|
360 | e1d1e586 | Alex Williamson | * interrupts, QEMU IRQ de-asserted.
|
361 | e1d1e586 | Alex Williamson | */
|
362 | e1d1e586 | Alex Williamson | vfio_mask_intx(vdev); |
363 | e1d1e586 | Alex Williamson | vdev->intx.pending = false;
|
364 | e1d1e586 | Alex Williamson | qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
|
365 | e1d1e586 | Alex Williamson | |
366 | e1d1e586 | Alex Williamson | /* Tell KVM to stop listening for an INTx irqfd */
|
367 | e1d1e586 | Alex Williamson | if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
|
368 | e1d1e586 | Alex Williamson | error_report("vfio: Error: Failed to disable INTx irqfd: %m\n");
|
369 | e1d1e586 | Alex Williamson | } |
370 | e1d1e586 | Alex Williamson | |
371 | e1d1e586 | Alex Williamson | /* We only need to close the eventfd for VFIO to cleanup the kernel side */
|
372 | e1d1e586 | Alex Williamson | event_notifier_cleanup(&vdev->intx.unmask); |
373 | e1d1e586 | Alex Williamson | |
374 | e1d1e586 | Alex Williamson | /* QEMU starts listening for interrupt events. */
|
375 | e1d1e586 | Alex Williamson | qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
|
376 | e1d1e586 | Alex Williamson | |
377 | e1d1e586 | Alex Williamson | vdev->intx.kvm_accel = false;
|
378 | e1d1e586 | Alex Williamson | |
379 | e1d1e586 | Alex Williamson | /* If we've missed an event, let it re-fire through QEMU */
|
380 | e1d1e586 | Alex Williamson | vfio_unmask_intx(vdev); |
381 | e1d1e586 | Alex Williamson | |
382 | e1d1e586 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) KVM INTx accel disabled\n",
|
383 | e1d1e586 | Alex Williamson | __func__, vdev->host.domain, vdev->host.bus, |
384 | e1d1e586 | Alex Williamson | vdev->host.slot, vdev->host.function); |
385 | e1d1e586 | Alex Williamson | #endif
|
386 | e1d1e586 | Alex Williamson | } |
387 | e1d1e586 | Alex Williamson | |
388 | e1d1e586 | Alex Williamson | static void vfio_update_irq(PCIDevice *pdev) |
389 | e1d1e586 | Alex Williamson | { |
390 | e1d1e586 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
391 | e1d1e586 | Alex Williamson | PCIINTxRoute route; |
392 | e1d1e586 | Alex Williamson | |
393 | e1d1e586 | Alex Williamson | if (vdev->interrupt != VFIO_INT_INTx) {
|
394 | e1d1e586 | Alex Williamson | return;
|
395 | e1d1e586 | Alex Williamson | } |
396 | e1d1e586 | Alex Williamson | |
397 | e1d1e586 | Alex Williamson | route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin); |
398 | e1d1e586 | Alex Williamson | |
399 | e1d1e586 | Alex Williamson | if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
|
400 | e1d1e586 | Alex Williamson | return; /* Nothing changed */ |
401 | e1d1e586 | Alex Williamson | } |
402 | e1d1e586 | Alex Williamson | |
403 | e1d1e586 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) IRQ moved %d -> %d\n", __func__,
|
404 | e1d1e586 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
405 | e1d1e586 | Alex Williamson | vdev->host.function, vdev->intx.route.irq, route.irq); |
406 | e1d1e586 | Alex Williamson | |
407 | e1d1e586 | Alex Williamson | vfio_disable_intx_kvm(vdev); |
408 | e1d1e586 | Alex Williamson | |
409 | e1d1e586 | Alex Williamson | vdev->intx.route = route; |
410 | e1d1e586 | Alex Williamson | |
411 | e1d1e586 | Alex Williamson | if (route.mode != PCI_INTX_ENABLED) {
|
412 | e1d1e586 | Alex Williamson | return;
|
413 | e1d1e586 | Alex Williamson | } |
414 | e1d1e586 | Alex Williamson | |
415 | e1d1e586 | Alex Williamson | vfio_enable_intx_kvm(vdev); |
416 | e1d1e586 | Alex Williamson | |
417 | e1d1e586 | Alex Williamson | /* Re-enable the interrupt in cased we missed an EOI */
|
418 | e1d1e586 | Alex Williamson | vfio_eoi(vdev); |
419 | e1d1e586 | Alex Williamson | } |
420 | e1d1e586 | Alex Williamson | |
421 | 65501a74 | Alex Williamson | static int vfio_enable_intx(VFIODevice *vdev) |
422 | 65501a74 | Alex Williamson | { |
423 | 65501a74 | Alex Williamson | uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
|
424 | 1a403133 | Alex Williamson | int ret, argsz;
|
425 | 1a403133 | Alex Williamson | struct vfio_irq_set *irq_set;
|
426 | 1a403133 | Alex Williamson | int32_t *pfd; |
427 | 65501a74 | Alex Williamson | |
428 | ea486926 | Alex Williamson | if (!pin) {
|
429 | 65501a74 | Alex Williamson | return 0; |
430 | 65501a74 | Alex Williamson | } |
431 | 65501a74 | Alex Williamson | |
432 | 65501a74 | Alex Williamson | vfio_disable_interrupts(vdev); |
433 | 65501a74 | Alex Williamson | |
434 | 65501a74 | Alex Williamson | vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */ |
435 | e1d1e586 | Alex Williamson | |
436 | e1d1e586 | Alex Williamson | #ifdef CONFIG_KVM
|
437 | e1d1e586 | Alex Williamson | /*
|
438 | e1d1e586 | Alex Williamson | * Only conditional to avoid generating error messages on platforms
|
439 | e1d1e586 | Alex Williamson | * where we won't actually use the result anyway.
|
440 | e1d1e586 | Alex Williamson | */
|
441 | d281084d | Alex Williamson | if (kvm_irqfds_enabled() &&
|
442 | d281084d | Alex Williamson | kvm_check_extension(kvm_state, KVM_CAP_IRQFD_RESAMPLE)) { |
443 | e1d1e586 | Alex Williamson | vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev, |
444 | e1d1e586 | Alex Williamson | vdev->intx.pin); |
445 | e1d1e586 | Alex Williamson | } |
446 | e1d1e586 | Alex Williamson | #endif
|
447 | e1d1e586 | Alex Williamson | |
448 | 65501a74 | Alex Williamson | ret = event_notifier_init(&vdev->intx.interrupt, 0);
|
449 | 65501a74 | Alex Williamson | if (ret) {
|
450 | 65501a74 | Alex Williamson | error_report("vfio: Error: event_notifier_init failed\n");
|
451 | 65501a74 | Alex Williamson | return ret;
|
452 | 65501a74 | Alex Williamson | } |
453 | 65501a74 | Alex Williamson | |
454 | 1a403133 | Alex Williamson | argsz = sizeof(*irq_set) + sizeof(*pfd); |
455 | 1a403133 | Alex Williamson | |
456 | 1a403133 | Alex Williamson | irq_set = g_malloc0(argsz); |
457 | 1a403133 | Alex Williamson | irq_set->argsz = argsz; |
458 | 1a403133 | Alex Williamson | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER; |
459 | 1a403133 | Alex Williamson | irq_set->index = VFIO_PCI_INTX_IRQ_INDEX; |
460 | 1a403133 | Alex Williamson | irq_set->start = 0;
|
461 | 1a403133 | Alex Williamson | irq_set->count = 1;
|
462 | 1a403133 | Alex Williamson | pfd = (int32_t *)&irq_set->data; |
463 | 1a403133 | Alex Williamson | |
464 | 1a403133 | Alex Williamson | *pfd = event_notifier_get_fd(&vdev->intx.interrupt); |
465 | 1a403133 | Alex Williamson | qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
|
466 | 65501a74 | Alex Williamson | |
467 | 1a403133 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
468 | 1a403133 | Alex Williamson | g_free(irq_set); |
469 | 1a403133 | Alex Williamson | if (ret) {
|
470 | 65501a74 | Alex Williamson | error_report("vfio: Error: Failed to setup INTx fd: %m\n");
|
471 | 1a403133 | Alex Williamson | qemu_set_fd_handler(*pfd, NULL, NULL, vdev); |
472 | ce59af2d | Alex Williamson | event_notifier_cleanup(&vdev->intx.interrupt); |
473 | 65501a74 | Alex Williamson | return -errno;
|
474 | 65501a74 | Alex Williamson | } |
475 | 65501a74 | Alex Williamson | |
476 | e1d1e586 | Alex Williamson | vfio_enable_intx_kvm(vdev); |
477 | e1d1e586 | Alex Williamson | |
478 | 65501a74 | Alex Williamson | vdev->interrupt = VFIO_INT_INTx; |
479 | 65501a74 | Alex Williamson | |
480 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
481 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
482 | 65501a74 | Alex Williamson | |
483 | 65501a74 | Alex Williamson | return 0; |
484 | 65501a74 | Alex Williamson | } |
485 | 65501a74 | Alex Williamson | |
486 | 65501a74 | Alex Williamson | static void vfio_disable_intx(VFIODevice *vdev) |
487 | 65501a74 | Alex Williamson | { |
488 | 65501a74 | Alex Williamson | int fd;
|
489 | 65501a74 | Alex Williamson | |
490 | ea486926 | Alex Williamson | qemu_del_timer(vdev->intx.mmap_timer); |
491 | e1d1e586 | Alex Williamson | vfio_disable_intx_kvm(vdev); |
492 | 65501a74 | Alex Williamson | vfio_disable_irqindex(vdev, VFIO_PCI_INTX_IRQ_INDEX); |
493 | 65501a74 | Alex Williamson | vdev->intx.pending = false;
|
494 | 65501a74 | Alex Williamson | qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
|
495 | 65501a74 | Alex Williamson | vfio_mmap_set_enabled(vdev, true);
|
496 | 65501a74 | Alex Williamson | |
497 | 65501a74 | Alex Williamson | fd = event_notifier_get_fd(&vdev->intx.interrupt); |
498 | 65501a74 | Alex Williamson | qemu_set_fd_handler(fd, NULL, NULL, vdev); |
499 | 65501a74 | Alex Williamson | event_notifier_cleanup(&vdev->intx.interrupt); |
500 | 65501a74 | Alex Williamson | |
501 | 65501a74 | Alex Williamson | vdev->interrupt = VFIO_INT_NONE; |
502 | 65501a74 | Alex Williamson | |
503 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
504 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
505 | 65501a74 | Alex Williamson | } |
506 | 65501a74 | Alex Williamson | |
507 | 65501a74 | Alex Williamson | /*
|
508 | 65501a74 | Alex Williamson | * MSI/X
|
509 | 65501a74 | Alex Williamson | */
|
510 | 65501a74 | Alex Williamson | static void vfio_msi_interrupt(void *opaque) |
511 | 65501a74 | Alex Williamson | { |
512 | 65501a74 | Alex Williamson | VFIOMSIVector *vector = opaque; |
513 | 65501a74 | Alex Williamson | VFIODevice *vdev = vector->vdev; |
514 | 65501a74 | Alex Williamson | int nr = vector - vdev->msi_vectors;
|
515 | 65501a74 | Alex Williamson | |
516 | 65501a74 | Alex Williamson | if (!event_notifier_test_and_clear(&vector->interrupt)) {
|
517 | 65501a74 | Alex Williamson | return;
|
518 | 65501a74 | Alex Williamson | } |
519 | 65501a74 | Alex Williamson | |
520 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) vector %d\n", __func__,
|
521 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
522 | 65501a74 | Alex Williamson | vdev->host.function, nr); |
523 | 65501a74 | Alex Williamson | |
524 | 65501a74 | Alex Williamson | if (vdev->interrupt == VFIO_INT_MSIX) {
|
525 | 65501a74 | Alex Williamson | msix_notify(&vdev->pdev, nr); |
526 | 65501a74 | Alex Williamson | } else if (vdev->interrupt == VFIO_INT_MSI) { |
527 | 65501a74 | Alex Williamson | msi_notify(&vdev->pdev, nr); |
528 | 65501a74 | Alex Williamson | } else {
|
529 | 65501a74 | Alex Williamson | error_report("vfio: MSI interrupt receieved, but not enabled?\n");
|
530 | 65501a74 | Alex Williamson | } |
531 | 65501a74 | Alex Williamson | } |
532 | 65501a74 | Alex Williamson | |
533 | 65501a74 | Alex Williamson | static int vfio_enable_vectors(VFIODevice *vdev, bool msix) |
534 | 65501a74 | Alex Williamson | { |
535 | 65501a74 | Alex Williamson | struct vfio_irq_set *irq_set;
|
536 | 65501a74 | Alex Williamson | int ret = 0, i, argsz; |
537 | 65501a74 | Alex Williamson | int32_t *fds; |
538 | 65501a74 | Alex Williamson | |
539 | 65501a74 | Alex Williamson | argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds)); |
540 | 65501a74 | Alex Williamson | |
541 | 65501a74 | Alex Williamson | irq_set = g_malloc0(argsz); |
542 | 65501a74 | Alex Williamson | irq_set->argsz = argsz; |
543 | 65501a74 | Alex Williamson | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER; |
544 | 65501a74 | Alex Williamson | irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX; |
545 | 65501a74 | Alex Williamson | irq_set->start = 0;
|
546 | 65501a74 | Alex Williamson | irq_set->count = vdev->nr_vectors; |
547 | 65501a74 | Alex Williamson | fds = (int32_t *)&irq_set->data; |
548 | 65501a74 | Alex Williamson | |
549 | 65501a74 | Alex Williamson | for (i = 0; i < vdev->nr_vectors; i++) { |
550 | 65501a74 | Alex Williamson | if (!vdev->msi_vectors[i].use) {
|
551 | 65501a74 | Alex Williamson | fds[i] = -1;
|
552 | 65501a74 | Alex Williamson | continue;
|
553 | 65501a74 | Alex Williamson | } |
554 | 65501a74 | Alex Williamson | |
555 | 65501a74 | Alex Williamson | fds[i] = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt); |
556 | 65501a74 | Alex Williamson | } |
557 | 65501a74 | Alex Williamson | |
558 | 65501a74 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
559 | 65501a74 | Alex Williamson | |
560 | 65501a74 | Alex Williamson | g_free(irq_set); |
561 | 65501a74 | Alex Williamson | |
562 | 65501a74 | Alex Williamson | return ret;
|
563 | 65501a74 | Alex Williamson | } |
564 | 65501a74 | Alex Williamson | |
565 | 65501a74 | Alex Williamson | static int vfio_msix_vector_use(PCIDevice *pdev, |
566 | 65501a74 | Alex Williamson | unsigned int nr, MSIMessage msg) |
567 | 65501a74 | Alex Williamson | { |
568 | 65501a74 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
569 | 65501a74 | Alex Williamson | VFIOMSIVector *vector; |
570 | 65501a74 | Alex Williamson | int ret;
|
571 | 65501a74 | Alex Williamson | |
572 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) vector %d used\n", __func__,
|
573 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
574 | 65501a74 | Alex Williamson | vdev->host.function, nr); |
575 | 65501a74 | Alex Williamson | |
576 | 65501a74 | Alex Williamson | vector = &vdev->msi_vectors[nr]; |
577 | 65501a74 | Alex Williamson | vector->vdev = vdev; |
578 | 65501a74 | Alex Williamson | vector->use = true;
|
579 | 65501a74 | Alex Williamson | |
580 | 65501a74 | Alex Williamson | msix_vector_use(pdev, nr); |
581 | 65501a74 | Alex Williamson | |
582 | 65501a74 | Alex Williamson | if (event_notifier_init(&vector->interrupt, 0)) { |
583 | 65501a74 | Alex Williamson | error_report("vfio: Error: event_notifier_init failed\n");
|
584 | 65501a74 | Alex Williamson | } |
585 | 65501a74 | Alex Williamson | |
586 | 65501a74 | Alex Williamson | /*
|
587 | 65501a74 | Alex Williamson | * Attempt to enable route through KVM irqchip,
|
588 | 65501a74 | Alex Williamson | * default to userspace handling if unavailable.
|
589 | 65501a74 | Alex Williamson | */
|
590 | 65501a74 | Alex Williamson | vector->virq = kvm_irqchip_add_msi_route(kvm_state, msg); |
591 | 65501a74 | Alex Williamson | if (vector->virq < 0 || |
592 | 65501a74 | Alex Williamson | kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt, |
593 | 65501a74 | Alex Williamson | vector->virq) < 0) {
|
594 | 65501a74 | Alex Williamson | if (vector->virq >= 0) { |
595 | 65501a74 | Alex Williamson | kvm_irqchip_release_virq(kvm_state, vector->virq); |
596 | 65501a74 | Alex Williamson | vector->virq = -1;
|
597 | 65501a74 | Alex Williamson | } |
598 | 65501a74 | Alex Williamson | qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
599 | 65501a74 | Alex Williamson | vfio_msi_interrupt, NULL, vector);
|
600 | 65501a74 | Alex Williamson | } |
601 | 65501a74 | Alex Williamson | |
602 | 65501a74 | Alex Williamson | /*
|
603 | 65501a74 | Alex Williamson | * We don't want to have the host allocate all possible MSI vectors
|
604 | 65501a74 | Alex Williamson | * for a device if they're not in use, so we shutdown and incrementally
|
605 | 65501a74 | Alex Williamson | * increase them as needed.
|
606 | 65501a74 | Alex Williamson | */
|
607 | 65501a74 | Alex Williamson | if (vdev->nr_vectors < nr + 1) { |
608 | 65501a74 | Alex Williamson | vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX); |
609 | 65501a74 | Alex Williamson | vdev->nr_vectors = nr + 1;
|
610 | 65501a74 | Alex Williamson | ret = vfio_enable_vectors(vdev, true);
|
611 | 65501a74 | Alex Williamson | if (ret) {
|
612 | 65501a74 | Alex Williamson | error_report("vfio: failed to enable vectors, %d\n", ret);
|
613 | 65501a74 | Alex Williamson | } |
614 | 65501a74 | Alex Williamson | } else {
|
615 | 1a403133 | Alex Williamson | int argsz;
|
616 | 1a403133 | Alex Williamson | struct vfio_irq_set *irq_set;
|
617 | 1a403133 | Alex Williamson | int32_t *pfd; |
618 | 1a403133 | Alex Williamson | |
619 | 1a403133 | Alex Williamson | argsz = sizeof(*irq_set) + sizeof(*pfd); |
620 | 1a403133 | Alex Williamson | |
621 | 1a403133 | Alex Williamson | irq_set = g_malloc0(argsz); |
622 | 1a403133 | Alex Williamson | irq_set->argsz = argsz; |
623 | 1a403133 | Alex Williamson | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | |
624 | 1a403133 | Alex Williamson | VFIO_IRQ_SET_ACTION_TRIGGER; |
625 | 1a403133 | Alex Williamson | irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX; |
626 | 1a403133 | Alex Williamson | irq_set->start = nr; |
627 | 1a403133 | Alex Williamson | irq_set->count = 1;
|
628 | 1a403133 | Alex Williamson | pfd = (int32_t *)&irq_set->data; |
629 | 1a403133 | Alex Williamson | |
630 | 1a403133 | Alex Williamson | *pfd = event_notifier_get_fd(&vector->interrupt); |
631 | 1a403133 | Alex Williamson | |
632 | 1a403133 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
633 | 1a403133 | Alex Williamson | g_free(irq_set); |
634 | 65501a74 | Alex Williamson | if (ret) {
|
635 | 65501a74 | Alex Williamson | error_report("vfio: failed to modify vector, %d\n", ret);
|
636 | 65501a74 | Alex Williamson | } |
637 | 65501a74 | Alex Williamson | } |
638 | 65501a74 | Alex Williamson | |
639 | 65501a74 | Alex Williamson | return 0; |
640 | 65501a74 | Alex Williamson | } |
641 | 65501a74 | Alex Williamson | |
642 | 65501a74 | Alex Williamson | static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr) |
643 | 65501a74 | Alex Williamson | { |
644 | 65501a74 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
645 | 65501a74 | Alex Williamson | VFIOMSIVector *vector = &vdev->msi_vectors[nr]; |
646 | 1a403133 | Alex Williamson | int argsz;
|
647 | 1a403133 | Alex Williamson | struct vfio_irq_set *irq_set;
|
648 | 1a403133 | Alex Williamson | int32_t *pfd; |
649 | 65501a74 | Alex Williamson | |
650 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) vector %d released\n", __func__,
|
651 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
652 | 65501a74 | Alex Williamson | vdev->host.function, nr); |
653 | 65501a74 | Alex Williamson | |
654 | 65501a74 | Alex Williamson | /*
|
655 | 65501a74 | Alex Williamson | * XXX What's the right thing to do here? This turns off the interrupt
|
656 | 65501a74 | Alex Williamson | * completely, but do we really just want to switch the interrupt to
|
657 | 65501a74 | Alex Williamson | * bouncing through userspace and let msix.c drop it? Not sure.
|
658 | 65501a74 | Alex Williamson | */
|
659 | 65501a74 | Alex Williamson | msix_vector_unuse(pdev, nr); |
660 | 1a403133 | Alex Williamson | |
661 | 1a403133 | Alex Williamson | argsz = sizeof(*irq_set) + sizeof(*pfd); |
662 | 1a403133 | Alex Williamson | |
663 | 1a403133 | Alex Williamson | irq_set = g_malloc0(argsz); |
664 | 1a403133 | Alex Williamson | irq_set->argsz = argsz; |
665 | 1a403133 | Alex Williamson | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | |
666 | 1a403133 | Alex Williamson | VFIO_IRQ_SET_ACTION_TRIGGER; |
667 | 1a403133 | Alex Williamson | irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX; |
668 | 1a403133 | Alex Williamson | irq_set->start = nr; |
669 | 1a403133 | Alex Williamson | irq_set->count = 1;
|
670 | 1a403133 | Alex Williamson | pfd = (int32_t *)&irq_set->data; |
671 | 1a403133 | Alex Williamson | |
672 | 1a403133 | Alex Williamson | *pfd = -1;
|
673 | 1a403133 | Alex Williamson | |
674 | 1a403133 | Alex Williamson | ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
675 | 1a403133 | Alex Williamson | |
676 | 1a403133 | Alex Williamson | g_free(irq_set); |
677 | 65501a74 | Alex Williamson | |
678 | 65501a74 | Alex Williamson | if (vector->virq < 0) { |
679 | 65501a74 | Alex Williamson | qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
680 | 65501a74 | Alex Williamson | NULL, NULL, NULL); |
681 | 65501a74 | Alex Williamson | } else {
|
682 | 65501a74 | Alex Williamson | kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt, |
683 | 65501a74 | Alex Williamson | vector->virq); |
684 | 65501a74 | Alex Williamson | kvm_irqchip_release_virq(kvm_state, vector->virq); |
685 | 65501a74 | Alex Williamson | vector->virq = -1;
|
686 | 65501a74 | Alex Williamson | } |
687 | 65501a74 | Alex Williamson | |
688 | 65501a74 | Alex Williamson | event_notifier_cleanup(&vector->interrupt); |
689 | 65501a74 | Alex Williamson | vector->use = false;
|
690 | 65501a74 | Alex Williamson | } |
691 | 65501a74 | Alex Williamson | |
692 | fd704adc | Alex Williamson | static void vfio_enable_msix(VFIODevice *vdev) |
693 | fd704adc | Alex Williamson | { |
694 | fd704adc | Alex Williamson | vfio_disable_interrupts(vdev); |
695 | fd704adc | Alex Williamson | |
696 | fd704adc | Alex Williamson | vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
|
697 | fd704adc | Alex Williamson | |
698 | fd704adc | Alex Williamson | vdev->interrupt = VFIO_INT_MSIX; |
699 | fd704adc | Alex Williamson | |
700 | fd704adc | Alex Williamson | if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
|
701 | fd704adc | Alex Williamson | vfio_msix_vector_release)) { |
702 | fd704adc | Alex Williamson | error_report("vfio: msix_set_vector_notifiers failed\n");
|
703 | fd704adc | Alex Williamson | } |
704 | fd704adc | Alex Williamson | |
705 | fd704adc | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
706 | fd704adc | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
707 | fd704adc | Alex Williamson | } |
708 | fd704adc | Alex Williamson | |
709 | 65501a74 | Alex Williamson | static void vfio_enable_msi(VFIODevice *vdev) |
710 | 65501a74 | Alex Williamson | { |
711 | 65501a74 | Alex Williamson | int ret, i;
|
712 | 65501a74 | Alex Williamson | |
713 | 65501a74 | Alex Williamson | vfio_disable_interrupts(vdev); |
714 | 65501a74 | Alex Williamson | |
715 | 65501a74 | Alex Williamson | vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev); |
716 | 65501a74 | Alex Williamson | retry:
|
717 | 65501a74 | Alex Williamson | vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
|
718 | 65501a74 | Alex Williamson | |
719 | 65501a74 | Alex Williamson | for (i = 0; i < vdev->nr_vectors; i++) { |
720 | 65501a74 | Alex Williamson | MSIMessage msg; |
721 | 65501a74 | Alex Williamson | VFIOMSIVector *vector = &vdev->msi_vectors[i]; |
722 | 65501a74 | Alex Williamson | |
723 | 65501a74 | Alex Williamson | vector->vdev = vdev; |
724 | 65501a74 | Alex Williamson | vector->use = true;
|
725 | 65501a74 | Alex Williamson | |
726 | 65501a74 | Alex Williamson | if (event_notifier_init(&vector->interrupt, 0)) { |
727 | 65501a74 | Alex Williamson | error_report("vfio: Error: event_notifier_init failed\n");
|
728 | 65501a74 | Alex Williamson | } |
729 | 65501a74 | Alex Williamson | |
730 | a771c517 | Alex Williamson | msg = msi_get_message(&vdev->pdev, i); |
731 | 65501a74 | Alex Williamson | |
732 | 65501a74 | Alex Williamson | /*
|
733 | 65501a74 | Alex Williamson | * Attempt to enable route through KVM irqchip,
|
734 | 65501a74 | Alex Williamson | * default to userspace handling if unavailable.
|
735 | 65501a74 | Alex Williamson | */
|
736 | 65501a74 | Alex Williamson | vector->virq = kvm_irqchip_add_msi_route(kvm_state, msg); |
737 | 65501a74 | Alex Williamson | if (vector->virq < 0 || |
738 | 65501a74 | Alex Williamson | kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt, |
739 | 65501a74 | Alex Williamson | vector->virq) < 0) {
|
740 | 65501a74 | Alex Williamson | qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
741 | 65501a74 | Alex Williamson | vfio_msi_interrupt, NULL, vector);
|
742 | 65501a74 | Alex Williamson | } |
743 | 65501a74 | Alex Williamson | } |
744 | 65501a74 | Alex Williamson | |
745 | 65501a74 | Alex Williamson | ret = vfio_enable_vectors(vdev, false);
|
746 | 65501a74 | Alex Williamson | if (ret) {
|
747 | 65501a74 | Alex Williamson | if (ret < 0) { |
748 | 65501a74 | Alex Williamson | error_report("vfio: Error: Failed to setup MSI fds: %m\n");
|
749 | 65501a74 | Alex Williamson | } else if (ret != vdev->nr_vectors) { |
750 | 65501a74 | Alex Williamson | error_report("vfio: Error: Failed to enable %d "
|
751 | 65501a74 | Alex Williamson | "MSI vectors, retry with %d\n", vdev->nr_vectors, ret);
|
752 | 65501a74 | Alex Williamson | } |
753 | 65501a74 | Alex Williamson | |
754 | 65501a74 | Alex Williamson | for (i = 0; i < vdev->nr_vectors; i++) { |
755 | 65501a74 | Alex Williamson | VFIOMSIVector *vector = &vdev->msi_vectors[i]; |
756 | 65501a74 | Alex Williamson | if (vector->virq >= 0) { |
757 | 65501a74 | Alex Williamson | kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt, |
758 | 65501a74 | Alex Williamson | vector->virq); |
759 | 65501a74 | Alex Williamson | kvm_irqchip_release_virq(kvm_state, vector->virq); |
760 | 65501a74 | Alex Williamson | vector->virq = -1;
|
761 | 65501a74 | Alex Williamson | } else {
|
762 | 65501a74 | Alex Williamson | qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
763 | 65501a74 | Alex Williamson | NULL, NULL, NULL); |
764 | 65501a74 | Alex Williamson | } |
765 | 65501a74 | Alex Williamson | event_notifier_cleanup(&vector->interrupt); |
766 | 65501a74 | Alex Williamson | } |
767 | 65501a74 | Alex Williamson | |
768 | 65501a74 | Alex Williamson | g_free(vdev->msi_vectors); |
769 | 65501a74 | Alex Williamson | |
770 | 65501a74 | Alex Williamson | if (ret > 0 && ret != vdev->nr_vectors) { |
771 | 65501a74 | Alex Williamson | vdev->nr_vectors = ret; |
772 | 65501a74 | Alex Williamson | goto retry;
|
773 | 65501a74 | Alex Williamson | } |
774 | 65501a74 | Alex Williamson | vdev->nr_vectors = 0;
|
775 | 65501a74 | Alex Williamson | |
776 | 65501a74 | Alex Williamson | return;
|
777 | 65501a74 | Alex Williamson | } |
778 | 65501a74 | Alex Williamson | |
779 | fd704adc | Alex Williamson | vdev->interrupt = VFIO_INT_MSI; |
780 | fd704adc | Alex Williamson | |
781 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) Enabled %d MSI vectors\n", __func__,
|
782 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
783 | 65501a74 | Alex Williamson | vdev->host.function, vdev->nr_vectors); |
784 | 65501a74 | Alex Williamson | } |
785 | 65501a74 | Alex Williamson | |
786 | fd704adc | Alex Williamson | static void vfio_disable_msi_common(VFIODevice *vdev) |
787 | fd704adc | Alex Williamson | { |
788 | fd704adc | Alex Williamson | g_free(vdev->msi_vectors); |
789 | fd704adc | Alex Williamson | vdev->msi_vectors = NULL;
|
790 | fd704adc | Alex Williamson | vdev->nr_vectors = 0;
|
791 | fd704adc | Alex Williamson | vdev->interrupt = VFIO_INT_NONE; |
792 | fd704adc | Alex Williamson | |
793 | fd704adc | Alex Williamson | vfio_enable_intx(vdev); |
794 | fd704adc | Alex Williamson | } |
795 | fd704adc | Alex Williamson | |
796 | fd704adc | Alex Williamson | static void vfio_disable_msix(VFIODevice *vdev) |
797 | fd704adc | Alex Williamson | { |
798 | fd704adc | Alex Williamson | msix_unset_vector_notifiers(&vdev->pdev); |
799 | fd704adc | Alex Williamson | |
800 | fd704adc | Alex Williamson | if (vdev->nr_vectors) {
|
801 | fd704adc | Alex Williamson | vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX); |
802 | fd704adc | Alex Williamson | } |
803 | fd704adc | Alex Williamson | |
804 | fd704adc | Alex Williamson | vfio_disable_msi_common(vdev); |
805 | fd704adc | Alex Williamson | |
806 | a011b10e | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
807 | a011b10e | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
808 | fd704adc | Alex Williamson | } |
809 | fd704adc | Alex Williamson | |
810 | fd704adc | Alex Williamson | static void vfio_disable_msi(VFIODevice *vdev) |
811 | 65501a74 | Alex Williamson | { |
812 | 65501a74 | Alex Williamson | int i;
|
813 | 65501a74 | Alex Williamson | |
814 | fd704adc | Alex Williamson | vfio_disable_irqindex(vdev, VFIO_PCI_MSI_IRQ_INDEX); |
815 | 65501a74 | Alex Williamson | |
816 | 65501a74 | Alex Williamson | for (i = 0; i < vdev->nr_vectors; i++) { |
817 | 65501a74 | Alex Williamson | VFIOMSIVector *vector = &vdev->msi_vectors[i]; |
818 | 65501a74 | Alex Williamson | |
819 | 65501a74 | Alex Williamson | if (!vector->use) {
|
820 | 65501a74 | Alex Williamson | continue;
|
821 | 65501a74 | Alex Williamson | } |
822 | 65501a74 | Alex Williamson | |
823 | 65501a74 | Alex Williamson | if (vector->virq >= 0) { |
824 | 65501a74 | Alex Williamson | kvm_irqchip_remove_irqfd_notifier(kvm_state, |
825 | 65501a74 | Alex Williamson | &vector->interrupt, vector->virq); |
826 | 65501a74 | Alex Williamson | kvm_irqchip_release_virq(kvm_state, vector->virq); |
827 | 65501a74 | Alex Williamson | vector->virq = -1;
|
828 | 65501a74 | Alex Williamson | } else {
|
829 | 65501a74 | Alex Williamson | qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
830 | 65501a74 | Alex Williamson | NULL, NULL, NULL); |
831 | 65501a74 | Alex Williamson | } |
832 | 65501a74 | Alex Williamson | |
833 | 65501a74 | Alex Williamson | event_notifier_cleanup(&vector->interrupt); |
834 | 65501a74 | Alex Williamson | } |
835 | 65501a74 | Alex Williamson | |
836 | fd704adc | Alex Williamson | vfio_disable_msi_common(vdev); |
837 | 65501a74 | Alex Williamson | |
838 | fd704adc | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
839 | fd704adc | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
840 | 65501a74 | Alex Williamson | } |
841 | 65501a74 | Alex Williamson | |
842 | 65501a74 | Alex Williamson | /*
|
843 | 65501a74 | Alex Williamson | * IO Port/MMIO - Beware of the endians, VFIO is always little endian
|
844 | 65501a74 | Alex Williamson | */
|
845 | a8170e5e | Avi Kivity | static void vfio_bar_write(void *opaque, hwaddr addr, |
846 | 65501a74 | Alex Williamson | uint64_t data, unsigned size)
|
847 | 65501a74 | Alex Williamson | { |
848 | 65501a74 | Alex Williamson | VFIOBAR *bar = opaque; |
849 | 65501a74 | Alex Williamson | union {
|
850 | 65501a74 | Alex Williamson | uint8_t byte; |
851 | 65501a74 | Alex Williamson | uint16_t word; |
852 | 65501a74 | Alex Williamson | uint32_t dword; |
853 | 65501a74 | Alex Williamson | uint64_t qword; |
854 | 65501a74 | Alex Williamson | } buf; |
855 | 65501a74 | Alex Williamson | |
856 | 65501a74 | Alex Williamson | switch (size) {
|
857 | 65501a74 | Alex Williamson | case 1: |
858 | 65501a74 | Alex Williamson | buf.byte = data; |
859 | 65501a74 | Alex Williamson | break;
|
860 | 65501a74 | Alex Williamson | case 2: |
861 | 65501a74 | Alex Williamson | buf.word = cpu_to_le16(data); |
862 | 65501a74 | Alex Williamson | break;
|
863 | 65501a74 | Alex Williamson | case 4: |
864 | 65501a74 | Alex Williamson | buf.dword = cpu_to_le32(data); |
865 | 65501a74 | Alex Williamson | break;
|
866 | 65501a74 | Alex Williamson | default:
|
867 | 65501a74 | Alex Williamson | hw_error("vfio: unsupported write size, %d bytes\n", size);
|
868 | 65501a74 | Alex Williamson | break;
|
869 | 65501a74 | Alex Williamson | } |
870 | 65501a74 | Alex Williamson | |
871 | 65501a74 | Alex Williamson | if (pwrite(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
|
872 | a8170e5e | Avi Kivity | error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m\n", |
873 | 65501a74 | Alex Williamson | __func__, addr, data, size); |
874 | 65501a74 | Alex Williamson | } |
875 | 65501a74 | Alex Williamson | |
876 | a8170e5e | Avi Kivity | DPRINTF("%s(BAR%d+0x%"HWADDR_PRIx", 0x%"PRIx64", %d)\n", |
877 | 65501a74 | Alex Williamson | __func__, bar->nr, addr, data, size); |
878 | 65501a74 | Alex Williamson | |
879 | 65501a74 | Alex Williamson | /*
|
880 | 65501a74 | Alex Williamson | * A read or write to a BAR always signals an INTx EOI. This will
|
881 | 65501a74 | Alex Williamson | * do nothing if not pending (including not in INTx mode). We assume
|
882 | 65501a74 | Alex Williamson | * that a BAR access is in response to an interrupt and that BAR
|
883 | 65501a74 | Alex Williamson | * accesses will service the interrupt. Unfortunately, we don't know
|
884 | 65501a74 | Alex Williamson | * which access will service the interrupt, so we're potentially
|
885 | 65501a74 | Alex Williamson | * getting quite a few host interrupts per guest interrupt.
|
886 | 65501a74 | Alex Williamson | */
|
887 | 3a4f2816 | Jan Kiszka | vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr])); |
888 | 65501a74 | Alex Williamson | } |
889 | 65501a74 | Alex Williamson | |
890 | 65501a74 | Alex Williamson | static uint64_t vfio_bar_read(void *opaque, |
891 | a8170e5e | Avi Kivity | hwaddr addr, unsigned size)
|
892 | 65501a74 | Alex Williamson | { |
893 | 65501a74 | Alex Williamson | VFIOBAR *bar = opaque; |
894 | 65501a74 | Alex Williamson | union {
|
895 | 65501a74 | Alex Williamson | uint8_t byte; |
896 | 65501a74 | Alex Williamson | uint16_t word; |
897 | 65501a74 | Alex Williamson | uint32_t dword; |
898 | 65501a74 | Alex Williamson | uint64_t qword; |
899 | 65501a74 | Alex Williamson | } buf; |
900 | 65501a74 | Alex Williamson | uint64_t data = 0;
|
901 | 65501a74 | Alex Williamson | |
902 | 65501a74 | Alex Williamson | if (pread(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
|
903 | a8170e5e | Avi Kivity | error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m\n", |
904 | 65501a74 | Alex Williamson | __func__, addr, size); |
905 | 65501a74 | Alex Williamson | return (uint64_t)-1; |
906 | 65501a74 | Alex Williamson | } |
907 | 65501a74 | Alex Williamson | |
908 | 65501a74 | Alex Williamson | switch (size) {
|
909 | 65501a74 | Alex Williamson | case 1: |
910 | 65501a74 | Alex Williamson | data = buf.byte; |
911 | 65501a74 | Alex Williamson | break;
|
912 | 65501a74 | Alex Williamson | case 2: |
913 | 65501a74 | Alex Williamson | data = le16_to_cpu(buf.word); |
914 | 65501a74 | Alex Williamson | break;
|
915 | 65501a74 | Alex Williamson | case 4: |
916 | 65501a74 | Alex Williamson | data = le32_to_cpu(buf.dword); |
917 | 65501a74 | Alex Williamson | break;
|
918 | 65501a74 | Alex Williamson | default:
|
919 | 65501a74 | Alex Williamson | hw_error("vfio: unsupported read size, %d bytes\n", size);
|
920 | 65501a74 | Alex Williamson | break;
|
921 | 65501a74 | Alex Williamson | } |
922 | 65501a74 | Alex Williamson | |
923 | a8170e5e | Avi Kivity | DPRINTF("%s(BAR%d+0x%"HWADDR_PRIx", %d) = 0x%"PRIx64"\n", |
924 | 65501a74 | Alex Williamson | __func__, bar->nr, addr, size, data); |
925 | 65501a74 | Alex Williamson | |
926 | 65501a74 | Alex Williamson | /* Same as write above */
|
927 | 3a4f2816 | Jan Kiszka | vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr])); |
928 | 65501a74 | Alex Williamson | |
929 | 65501a74 | Alex Williamson | return data;
|
930 | 65501a74 | Alex Williamson | } |
931 | 65501a74 | Alex Williamson | |
932 | 65501a74 | Alex Williamson | static const MemoryRegionOps vfio_bar_ops = { |
933 | 65501a74 | Alex Williamson | .read = vfio_bar_read, |
934 | 65501a74 | Alex Williamson | .write = vfio_bar_write, |
935 | 65501a74 | Alex Williamson | .endianness = DEVICE_LITTLE_ENDIAN, |
936 | 65501a74 | Alex Williamson | }; |
937 | 65501a74 | Alex Williamson | |
938 | 65501a74 | Alex Williamson | /*
|
939 | 65501a74 | Alex Williamson | * PCI config space
|
940 | 65501a74 | Alex Williamson | */
|
941 | 65501a74 | Alex Williamson | static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len) |
942 | 65501a74 | Alex Williamson | { |
943 | 65501a74 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
944 | 65501a74 | Alex Williamson | uint32_t val = 0;
|
945 | 65501a74 | Alex Williamson | |
946 | 65501a74 | Alex Williamson | /*
|
947 | 65501a74 | Alex Williamson | * We only need QEMU PCI config support for the ROM BAR, the MSI and MSIX
|
948 | 65501a74 | Alex Williamson | * capabilities, and the multifunction bit below. We let VFIO handle
|
949 | 65501a74 | Alex Williamson | * virtualizing everything else. Performance is not a concern here.
|
950 | 65501a74 | Alex Williamson | */
|
951 | 65501a74 | Alex Williamson | if (ranges_overlap(addr, len, PCI_ROM_ADDRESS, 4) || |
952 | 65501a74 | Alex Williamson | (pdev->cap_present & QEMU_PCI_CAP_MSIX && |
953 | 65501a74 | Alex Williamson | ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) || |
954 | 65501a74 | Alex Williamson | (pdev->cap_present & QEMU_PCI_CAP_MSI && |
955 | 65501a74 | Alex Williamson | ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size))) { |
956 | 65501a74 | Alex Williamson | |
957 | 65501a74 | Alex Williamson | val = pci_default_read_config(pdev, addr, len); |
958 | 65501a74 | Alex Williamson | } else {
|
959 | 65501a74 | Alex Williamson | if (pread(vdev->fd, &val, len, vdev->config_offset + addr) != len) {
|
960 | 65501a74 | Alex Williamson | error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x) failed: %m\n",
|
961 | 65501a74 | Alex Williamson | __func__, vdev->host.domain, vdev->host.bus, |
962 | 65501a74 | Alex Williamson | vdev->host.slot, vdev->host.function, addr, len); |
963 | 65501a74 | Alex Williamson | return -errno;
|
964 | 65501a74 | Alex Williamson | } |
965 | 65501a74 | Alex Williamson | val = le32_to_cpu(val); |
966 | 65501a74 | Alex Williamson | } |
967 | 65501a74 | Alex Williamson | |
968 | 65501a74 | Alex Williamson | /* Multifunction bit is virualized in QEMU */
|
969 | 65501a74 | Alex Williamson | if (unlikely(ranges_overlap(addr, len, PCI_HEADER_TYPE, 1))) { |
970 | 65501a74 | Alex Williamson | uint32_t mask = PCI_HEADER_TYPE_MULTI_FUNCTION; |
971 | 65501a74 | Alex Williamson | |
972 | 65501a74 | Alex Williamson | if (len == 4) { |
973 | 65501a74 | Alex Williamson | mask <<= 16;
|
974 | 65501a74 | Alex Williamson | } |
975 | 65501a74 | Alex Williamson | |
976 | 65501a74 | Alex Williamson | if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
|
977 | 65501a74 | Alex Williamson | val |= mask; |
978 | 65501a74 | Alex Williamson | } else {
|
979 | 65501a74 | Alex Williamson | val &= ~mask; |
980 | 65501a74 | Alex Williamson | } |
981 | 65501a74 | Alex Williamson | } |
982 | 65501a74 | Alex Williamson | |
983 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, len=0x%x) %x\n", __func__,
|
984 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
985 | 65501a74 | Alex Williamson | vdev->host.function, addr, len, val); |
986 | 65501a74 | Alex Williamson | |
987 | 65501a74 | Alex Williamson | return val;
|
988 | 65501a74 | Alex Williamson | } |
989 | 65501a74 | Alex Williamson | |
990 | 65501a74 | Alex Williamson | static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr, |
991 | 65501a74 | Alex Williamson | uint32_t val, int len)
|
992 | 65501a74 | Alex Williamson | { |
993 | 65501a74 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
994 | 65501a74 | Alex Williamson | uint32_t val_le = cpu_to_le32(val); |
995 | 65501a74 | Alex Williamson | |
996 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, 0x%x, len=0x%x)\n", __func__,
|
997 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
998 | 65501a74 | Alex Williamson | vdev->host.function, addr, val, len); |
999 | 65501a74 | Alex Williamson | |
1000 | 65501a74 | Alex Williamson | /* Write everything to VFIO, let it filter out what we can't write */
|
1001 | 65501a74 | Alex Williamson | if (pwrite(vdev->fd, &val_le, len, vdev->config_offset + addr) != len) {
|
1002 | 65501a74 | Alex Williamson | error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x, 0x%x) failed: %m\n",
|
1003 | 65501a74 | Alex Williamson | __func__, vdev->host.domain, vdev->host.bus, |
1004 | 65501a74 | Alex Williamson | vdev->host.slot, vdev->host.function, addr, val, len); |
1005 | 65501a74 | Alex Williamson | } |
1006 | 65501a74 | Alex Williamson | |
1007 | 65501a74 | Alex Williamson | /* Write standard header bits to emulation */
|
1008 | 65501a74 | Alex Williamson | if (addr < PCI_CONFIG_HEADER_SIZE) {
|
1009 | 65501a74 | Alex Williamson | pci_default_write_config(pdev, addr, val, len); |
1010 | 65501a74 | Alex Williamson | return;
|
1011 | 65501a74 | Alex Williamson | } |
1012 | 65501a74 | Alex Williamson | |
1013 | 65501a74 | Alex Williamson | /* MSI/MSI-X Enabling/Disabling */
|
1014 | 65501a74 | Alex Williamson | if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
|
1015 | 65501a74 | Alex Williamson | ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) { |
1016 | 65501a74 | Alex Williamson | int is_enabled, was_enabled = msi_enabled(pdev);
|
1017 | 65501a74 | Alex Williamson | |
1018 | 65501a74 | Alex Williamson | pci_default_write_config(pdev, addr, val, len); |
1019 | 65501a74 | Alex Williamson | |
1020 | 65501a74 | Alex Williamson | is_enabled = msi_enabled(pdev); |
1021 | 65501a74 | Alex Williamson | |
1022 | 65501a74 | Alex Williamson | if (!was_enabled && is_enabled) {
|
1023 | 65501a74 | Alex Williamson | vfio_enable_msi(vdev); |
1024 | 65501a74 | Alex Williamson | } else if (was_enabled && !is_enabled) { |
1025 | fd704adc | Alex Williamson | vfio_disable_msi(vdev); |
1026 | 65501a74 | Alex Williamson | } |
1027 | 65501a74 | Alex Williamson | } |
1028 | 65501a74 | Alex Williamson | |
1029 | 65501a74 | Alex Williamson | if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
|
1030 | 65501a74 | Alex Williamson | ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) { |
1031 | 65501a74 | Alex Williamson | int is_enabled, was_enabled = msix_enabled(pdev);
|
1032 | 65501a74 | Alex Williamson | |
1033 | 65501a74 | Alex Williamson | pci_default_write_config(pdev, addr, val, len); |
1034 | 65501a74 | Alex Williamson | |
1035 | 65501a74 | Alex Williamson | is_enabled = msix_enabled(pdev); |
1036 | 65501a74 | Alex Williamson | |
1037 | 65501a74 | Alex Williamson | if (!was_enabled && is_enabled) {
|
1038 | fd704adc | Alex Williamson | vfio_enable_msix(vdev); |
1039 | 65501a74 | Alex Williamson | } else if (was_enabled && !is_enabled) { |
1040 | fd704adc | Alex Williamson | vfio_disable_msix(vdev); |
1041 | 65501a74 | Alex Williamson | } |
1042 | 65501a74 | Alex Williamson | } |
1043 | 65501a74 | Alex Williamson | } |
1044 | 65501a74 | Alex Williamson | |
1045 | 65501a74 | Alex Williamson | /*
|
1046 | 65501a74 | Alex Williamson | * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
|
1047 | 65501a74 | Alex Williamson | */
|
1048 | af6bc27e | Alex Williamson | static int vfio_dma_unmap(VFIOContainer *container, |
1049 | a8170e5e | Avi Kivity | hwaddr iova, ram_addr_t size) |
1050 | af6bc27e | Alex Williamson | { |
1051 | af6bc27e | Alex Williamson | struct vfio_iommu_type1_dma_unmap unmap = {
|
1052 | af6bc27e | Alex Williamson | .argsz = sizeof(unmap),
|
1053 | af6bc27e | Alex Williamson | .flags = 0,
|
1054 | af6bc27e | Alex Williamson | .iova = iova, |
1055 | af6bc27e | Alex Williamson | .size = size, |
1056 | af6bc27e | Alex Williamson | }; |
1057 | af6bc27e | Alex Williamson | |
1058 | af6bc27e | Alex Williamson | if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
|
1059 | af6bc27e | Alex Williamson | DPRINTF("VFIO_UNMAP_DMA: %d\n", -errno);
|
1060 | af6bc27e | Alex Williamson | return -errno;
|
1061 | af6bc27e | Alex Williamson | } |
1062 | af6bc27e | Alex Williamson | |
1063 | af6bc27e | Alex Williamson | return 0; |
1064 | af6bc27e | Alex Williamson | } |
1065 | af6bc27e | Alex Williamson | |
1066 | a8170e5e | Avi Kivity | static int vfio_dma_map(VFIOContainer *container, hwaddr iova, |
1067 | 65501a74 | Alex Williamson | ram_addr_t size, void *vaddr, bool readonly) |
1068 | 65501a74 | Alex Williamson | { |
1069 | 65501a74 | Alex Williamson | struct vfio_iommu_type1_dma_map map = {
|
1070 | 65501a74 | Alex Williamson | .argsz = sizeof(map),
|
1071 | 65501a74 | Alex Williamson | .flags = VFIO_DMA_MAP_FLAG_READ, |
1072 | 5976cdd5 | Alex Williamson | .vaddr = (__u64)(uintptr_t)vaddr, |
1073 | 65501a74 | Alex Williamson | .iova = iova, |
1074 | 65501a74 | Alex Williamson | .size = size, |
1075 | 65501a74 | Alex Williamson | }; |
1076 | 65501a74 | Alex Williamson | |
1077 | 65501a74 | Alex Williamson | if (!readonly) {
|
1078 | 65501a74 | Alex Williamson | map.flags |= VFIO_DMA_MAP_FLAG_WRITE; |
1079 | 65501a74 | Alex Williamson | } |
1080 | 65501a74 | Alex Williamson | |
1081 | 12af1344 | Alex Williamson | /*
|
1082 | 12af1344 | Alex Williamson | * Try the mapping, if it fails with EBUSY, unmap the region and try
|
1083 | 12af1344 | Alex Williamson | * again. This shouldn't be necessary, but we sometimes see it in
|
1084 | 12af1344 | Alex Williamson | * the the VGA ROM space.
|
1085 | 12af1344 | Alex Williamson | */
|
1086 | 12af1344 | Alex Williamson | if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 || |
1087 | 12af1344 | Alex Williamson | (errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
|
1088 | 12af1344 | Alex Williamson | ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
|
1089 | 12af1344 | Alex Williamson | return 0; |
1090 | 65501a74 | Alex Williamson | } |
1091 | 65501a74 | Alex Williamson | |
1092 | 12af1344 | Alex Williamson | DPRINTF("VFIO_MAP_DMA: %d\n", -errno);
|
1093 | 12af1344 | Alex Williamson | return -errno;
|
1094 | 65501a74 | Alex Williamson | } |
1095 | 65501a74 | Alex Williamson | |
1096 | 65501a74 | Alex Williamson | static bool vfio_listener_skipped_section(MemoryRegionSection *section) |
1097 | 65501a74 | Alex Williamson | { |
1098 | 65501a74 | Alex Williamson | return !memory_region_is_ram(section->mr);
|
1099 | 65501a74 | Alex Williamson | } |
1100 | 65501a74 | Alex Williamson | |
1101 | 65501a74 | Alex Williamson | static void vfio_listener_region_add(MemoryListener *listener, |
1102 | 65501a74 | Alex Williamson | MemoryRegionSection *section) |
1103 | 65501a74 | Alex Williamson | { |
1104 | 65501a74 | Alex Williamson | VFIOContainer *container = container_of(listener, VFIOContainer, |
1105 | 65501a74 | Alex Williamson | iommu_data.listener); |
1106 | a8170e5e | Avi Kivity | hwaddr iova, end; |
1107 | 65501a74 | Alex Williamson | void *vaddr;
|
1108 | 65501a74 | Alex Williamson | int ret;
|
1109 | 65501a74 | Alex Williamson | |
1110 | 65501a74 | Alex Williamson | if (vfio_listener_skipped_section(section)) {
|
1111 | a8170e5e | Avi Kivity | DPRINTF("vfio: SKIPPING region_add %"HWADDR_PRIx" - %"PRIx64"\n", |
1112 | 65501a74 | Alex Williamson | section->offset_within_address_space, |
1113 | 65501a74 | Alex Williamson | section->offset_within_address_space + section->size - 1);
|
1114 | 65501a74 | Alex Williamson | return;
|
1115 | 65501a74 | Alex Williamson | } |
1116 | 65501a74 | Alex Williamson | |
1117 | 65501a74 | Alex Williamson | if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
|
1118 | 65501a74 | Alex Williamson | (section->offset_within_region & ~TARGET_PAGE_MASK))) { |
1119 | 65501a74 | Alex Williamson | error_report("%s received unaligned region\n", __func__);
|
1120 | 65501a74 | Alex Williamson | return;
|
1121 | 65501a74 | Alex Williamson | } |
1122 | 65501a74 | Alex Williamson | |
1123 | 65501a74 | Alex Williamson | iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); |
1124 | 65501a74 | Alex Williamson | end = (section->offset_within_address_space + section->size) & |
1125 | 65501a74 | Alex Williamson | TARGET_PAGE_MASK; |
1126 | 65501a74 | Alex Williamson | |
1127 | 65501a74 | Alex Williamson | if (iova >= end) {
|
1128 | 65501a74 | Alex Williamson | return;
|
1129 | 65501a74 | Alex Williamson | } |
1130 | 65501a74 | Alex Williamson | |
1131 | 65501a74 | Alex Williamson | vaddr = memory_region_get_ram_ptr(section->mr) + |
1132 | 65501a74 | Alex Williamson | section->offset_within_region + |
1133 | 65501a74 | Alex Williamson | (iova - section->offset_within_address_space); |
1134 | 65501a74 | Alex Williamson | |
1135 | a8170e5e | Avi Kivity | DPRINTF("vfio: region_add %"HWADDR_PRIx" - %"HWADDR_PRIx" [%p]\n", |
1136 | 65501a74 | Alex Williamson | iova, end - 1, vaddr);
|
1137 | 65501a74 | Alex Williamson | |
1138 | 65501a74 | Alex Williamson | ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly); |
1139 | 65501a74 | Alex Williamson | if (ret) {
|
1140 | a8170e5e | Avi Kivity | error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " |
1141 | a8170e5e | Avi Kivity | "0x%"HWADDR_PRIx", %p) = %d (%m)\n", |
1142 | 65501a74 | Alex Williamson | container, iova, end - iova, vaddr, ret); |
1143 | 65501a74 | Alex Williamson | } |
1144 | 65501a74 | Alex Williamson | } |
1145 | 65501a74 | Alex Williamson | |
1146 | 65501a74 | Alex Williamson | static void vfio_listener_region_del(MemoryListener *listener, |
1147 | 65501a74 | Alex Williamson | MemoryRegionSection *section) |
1148 | 65501a74 | Alex Williamson | { |
1149 | 65501a74 | Alex Williamson | VFIOContainer *container = container_of(listener, VFIOContainer, |
1150 | 65501a74 | Alex Williamson | iommu_data.listener); |
1151 | a8170e5e | Avi Kivity | hwaddr iova, end; |
1152 | 65501a74 | Alex Williamson | int ret;
|
1153 | 65501a74 | Alex Williamson | |
1154 | 65501a74 | Alex Williamson | if (vfio_listener_skipped_section(section)) {
|
1155 | a8170e5e | Avi Kivity | DPRINTF("vfio: SKIPPING region_del %"HWADDR_PRIx" - %"PRIx64"\n", |
1156 | 65501a74 | Alex Williamson | section->offset_within_address_space, |
1157 | 65501a74 | Alex Williamson | section->offset_within_address_space + section->size - 1);
|
1158 | 65501a74 | Alex Williamson | return;
|
1159 | 65501a74 | Alex Williamson | } |
1160 | 65501a74 | Alex Williamson | |
1161 | 65501a74 | Alex Williamson | if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
|
1162 | 65501a74 | Alex Williamson | (section->offset_within_region & ~TARGET_PAGE_MASK))) { |
1163 | 65501a74 | Alex Williamson | error_report("%s received unaligned region\n", __func__);
|
1164 | 65501a74 | Alex Williamson | return;
|
1165 | 65501a74 | Alex Williamson | } |
1166 | 65501a74 | Alex Williamson | |
1167 | 65501a74 | Alex Williamson | iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); |
1168 | 65501a74 | Alex Williamson | end = (section->offset_within_address_space + section->size) & |
1169 | 65501a74 | Alex Williamson | TARGET_PAGE_MASK; |
1170 | 65501a74 | Alex Williamson | |
1171 | 65501a74 | Alex Williamson | if (iova >= end) {
|
1172 | 65501a74 | Alex Williamson | return;
|
1173 | 65501a74 | Alex Williamson | } |
1174 | 65501a74 | Alex Williamson | |
1175 | a8170e5e | Avi Kivity | DPRINTF("vfio: region_del %"HWADDR_PRIx" - %"HWADDR_PRIx"\n", |
1176 | 65501a74 | Alex Williamson | iova, end - 1);
|
1177 | 65501a74 | Alex Williamson | |
1178 | 65501a74 | Alex Williamson | ret = vfio_dma_unmap(container, iova, end - iova); |
1179 | 65501a74 | Alex Williamson | if (ret) {
|
1180 | a8170e5e | Avi Kivity | error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " |
1181 | a8170e5e | Avi Kivity | "0x%"HWADDR_PRIx") = %d (%m)\n", |
1182 | 65501a74 | Alex Williamson | container, iova, end - iova, ret); |
1183 | 65501a74 | Alex Williamson | } |
1184 | 65501a74 | Alex Williamson | } |
1185 | 65501a74 | Alex Williamson | |
1186 | 65501a74 | Alex Williamson | static MemoryListener vfio_memory_listener = {
|
1187 | 65501a74 | Alex Williamson | .region_add = vfio_listener_region_add, |
1188 | 65501a74 | Alex Williamson | .region_del = vfio_listener_region_del, |
1189 | 65501a74 | Alex Williamson | }; |
1190 | 65501a74 | Alex Williamson | |
1191 | 65501a74 | Alex Williamson | static void vfio_listener_release(VFIOContainer *container) |
1192 | 65501a74 | Alex Williamson | { |
1193 | 65501a74 | Alex Williamson | memory_listener_unregister(&container->iommu_data.listener); |
1194 | 65501a74 | Alex Williamson | } |
1195 | 65501a74 | Alex Williamson | |
1196 | 65501a74 | Alex Williamson | /*
|
1197 | 65501a74 | Alex Williamson | * Interrupt setup
|
1198 | 65501a74 | Alex Williamson | */
|
1199 | 65501a74 | Alex Williamson | static void vfio_disable_interrupts(VFIODevice *vdev) |
1200 | 65501a74 | Alex Williamson | { |
1201 | 65501a74 | Alex Williamson | switch (vdev->interrupt) {
|
1202 | 65501a74 | Alex Williamson | case VFIO_INT_INTx:
|
1203 | 65501a74 | Alex Williamson | vfio_disable_intx(vdev); |
1204 | 65501a74 | Alex Williamson | break;
|
1205 | 65501a74 | Alex Williamson | case VFIO_INT_MSI:
|
1206 | fd704adc | Alex Williamson | vfio_disable_msi(vdev); |
1207 | 65501a74 | Alex Williamson | break;
|
1208 | 65501a74 | Alex Williamson | case VFIO_INT_MSIX:
|
1209 | fd704adc | Alex Williamson | vfio_disable_msix(vdev); |
1210 | 65501a74 | Alex Williamson | break;
|
1211 | 65501a74 | Alex Williamson | } |
1212 | 65501a74 | Alex Williamson | } |
1213 | 65501a74 | Alex Williamson | |
1214 | 65501a74 | Alex Williamson | static int vfio_setup_msi(VFIODevice *vdev, int pos) |
1215 | 65501a74 | Alex Williamson | { |
1216 | 65501a74 | Alex Williamson | uint16_t ctrl; |
1217 | 65501a74 | Alex Williamson | bool msi_64bit, msi_maskbit;
|
1218 | 65501a74 | Alex Williamson | int ret, entries;
|
1219 | 65501a74 | Alex Williamson | |
1220 | 65501a74 | Alex Williamson | if (pread(vdev->fd, &ctrl, sizeof(ctrl), |
1221 | 65501a74 | Alex Williamson | vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
1222 | 65501a74 | Alex Williamson | return -errno;
|
1223 | 65501a74 | Alex Williamson | } |
1224 | 65501a74 | Alex Williamson | ctrl = le16_to_cpu(ctrl); |
1225 | 65501a74 | Alex Williamson | |
1226 | 65501a74 | Alex Williamson | msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT); |
1227 | 65501a74 | Alex Williamson | msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT); |
1228 | 65501a74 | Alex Williamson | entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1); |
1229 | 65501a74 | Alex Williamson | |
1230 | 65501a74 | Alex Williamson | DPRINTF("%04x:%02x:%02x.%x PCI MSI CAP @0x%x\n", vdev->host.domain,
|
1231 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function, pos); |
1232 | 65501a74 | Alex Williamson | |
1233 | 65501a74 | Alex Williamson | ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit); |
1234 | 65501a74 | Alex Williamson | if (ret < 0) { |
1235 | e43b9a5a | Alex Williamson | if (ret == -ENOTSUP) {
|
1236 | e43b9a5a | Alex Williamson | return 0; |
1237 | e43b9a5a | Alex Williamson | } |
1238 | 65501a74 | Alex Williamson | error_report("vfio: msi_init failed\n");
|
1239 | 65501a74 | Alex Williamson | return ret;
|
1240 | 65501a74 | Alex Williamson | } |
1241 | 65501a74 | Alex Williamson | vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0); |
1242 | 65501a74 | Alex Williamson | |
1243 | 65501a74 | Alex Williamson | return 0; |
1244 | 65501a74 | Alex Williamson | } |
1245 | 65501a74 | Alex Williamson | |
1246 | 65501a74 | Alex Williamson | /*
|
1247 | 65501a74 | Alex Williamson | * We don't have any control over how pci_add_capability() inserts
|
1248 | 65501a74 | Alex Williamson | * capabilities into the chain. In order to setup MSI-X we need a
|
1249 | 65501a74 | Alex Williamson | * MemoryRegion for the BAR. In order to setup the BAR and not
|
1250 | 65501a74 | Alex Williamson | * attempt to mmap the MSI-X table area, which VFIO won't allow, we
|
1251 | 65501a74 | Alex Williamson | * need to first look for where the MSI-X table lives. So we
|
1252 | 65501a74 | Alex Williamson | * unfortunately split MSI-X setup across two functions.
|
1253 | 65501a74 | Alex Williamson | */
|
1254 | 65501a74 | Alex Williamson | static int vfio_early_setup_msix(VFIODevice *vdev) |
1255 | 65501a74 | Alex Williamson | { |
1256 | 65501a74 | Alex Williamson | uint8_t pos; |
1257 | 65501a74 | Alex Williamson | uint16_t ctrl; |
1258 | 65501a74 | Alex Williamson | uint32_t table, pba; |
1259 | 65501a74 | Alex Williamson | |
1260 | 65501a74 | Alex Williamson | pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX); |
1261 | 65501a74 | Alex Williamson | if (!pos) {
|
1262 | 65501a74 | Alex Williamson | return 0; |
1263 | 65501a74 | Alex Williamson | } |
1264 | 65501a74 | Alex Williamson | |
1265 | 65501a74 | Alex Williamson | if (pread(vdev->fd, &ctrl, sizeof(ctrl), |
1266 | 65501a74 | Alex Williamson | vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
1267 | 65501a74 | Alex Williamson | return -errno;
|
1268 | 65501a74 | Alex Williamson | } |
1269 | 65501a74 | Alex Williamson | |
1270 | 65501a74 | Alex Williamson | if (pread(vdev->fd, &table, sizeof(table), |
1271 | 65501a74 | Alex Williamson | vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
|
1272 | 65501a74 | Alex Williamson | return -errno;
|
1273 | 65501a74 | Alex Williamson | } |
1274 | 65501a74 | Alex Williamson | |
1275 | 65501a74 | Alex Williamson | if (pread(vdev->fd, &pba, sizeof(pba), |
1276 | 65501a74 | Alex Williamson | vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
|
1277 | 65501a74 | Alex Williamson | return -errno;
|
1278 | 65501a74 | Alex Williamson | } |
1279 | 65501a74 | Alex Williamson | |
1280 | 65501a74 | Alex Williamson | ctrl = le16_to_cpu(ctrl); |
1281 | 65501a74 | Alex Williamson | table = le32_to_cpu(table); |
1282 | 65501a74 | Alex Williamson | pba = le32_to_cpu(pba); |
1283 | 65501a74 | Alex Williamson | |
1284 | 65501a74 | Alex Williamson | vdev->msix = g_malloc0(sizeof(*(vdev->msix)));
|
1285 | 65501a74 | Alex Williamson | vdev->msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK; |
1286 | 65501a74 | Alex Williamson | vdev->msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; |
1287 | 65501a74 | Alex Williamson | vdev->msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; |
1288 | 65501a74 | Alex Williamson | vdev->msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; |
1289 | 65501a74 | Alex Williamson | vdev->msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
|
1290 | 65501a74 | Alex Williamson | |
1291 | 65501a74 | Alex Williamson | DPRINTF("%04x:%02x:%02x.%x "
|
1292 | 65501a74 | Alex Williamson | "PCI MSI-X CAP @0x%x, BAR %d, offset 0x%x, entries %d\n",
|
1293 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
1294 | 65501a74 | Alex Williamson | vdev->host.function, pos, vdev->msix->table_bar, |
1295 | 65501a74 | Alex Williamson | vdev->msix->table_offset, vdev->msix->entries); |
1296 | 65501a74 | Alex Williamson | |
1297 | 65501a74 | Alex Williamson | return 0; |
1298 | 65501a74 | Alex Williamson | } |
1299 | 65501a74 | Alex Williamson | |
1300 | 65501a74 | Alex Williamson | static int vfio_setup_msix(VFIODevice *vdev, int pos) |
1301 | 65501a74 | Alex Williamson | { |
1302 | 65501a74 | Alex Williamson | int ret;
|
1303 | 65501a74 | Alex Williamson | |
1304 | 65501a74 | Alex Williamson | ret = msix_init(&vdev->pdev, vdev->msix->entries, |
1305 | 65501a74 | Alex Williamson | &vdev->bars[vdev->msix->table_bar].mem, |
1306 | 65501a74 | Alex Williamson | vdev->msix->table_bar, vdev->msix->table_offset, |
1307 | 65501a74 | Alex Williamson | &vdev->bars[vdev->msix->pba_bar].mem, |
1308 | 65501a74 | Alex Williamson | vdev->msix->pba_bar, vdev->msix->pba_offset, pos); |
1309 | 65501a74 | Alex Williamson | if (ret < 0) { |
1310 | e43b9a5a | Alex Williamson | if (ret == -ENOTSUP) {
|
1311 | e43b9a5a | Alex Williamson | return 0; |
1312 | e43b9a5a | Alex Williamson | } |
1313 | 65501a74 | Alex Williamson | error_report("vfio: msix_init failed\n");
|
1314 | 65501a74 | Alex Williamson | return ret;
|
1315 | 65501a74 | Alex Williamson | } |
1316 | 65501a74 | Alex Williamson | |
1317 | 65501a74 | Alex Williamson | return 0; |
1318 | 65501a74 | Alex Williamson | } |
1319 | 65501a74 | Alex Williamson | |
1320 | 65501a74 | Alex Williamson | static void vfio_teardown_msi(VFIODevice *vdev) |
1321 | 65501a74 | Alex Williamson | { |
1322 | 65501a74 | Alex Williamson | msi_uninit(&vdev->pdev); |
1323 | 65501a74 | Alex Williamson | |
1324 | 65501a74 | Alex Williamson | if (vdev->msix) {
|
1325 | 65501a74 | Alex Williamson | msix_uninit(&vdev->pdev, &vdev->bars[vdev->msix->table_bar].mem, |
1326 | 65501a74 | Alex Williamson | &vdev->bars[vdev->msix->pba_bar].mem); |
1327 | 65501a74 | Alex Williamson | } |
1328 | 65501a74 | Alex Williamson | } |
1329 | 65501a74 | Alex Williamson | |
1330 | 65501a74 | Alex Williamson | /*
|
1331 | 65501a74 | Alex Williamson | * Resource setup
|
1332 | 65501a74 | Alex Williamson | */
|
1333 | 65501a74 | Alex Williamson | static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled) |
1334 | 65501a74 | Alex Williamson | { |
1335 | 65501a74 | Alex Williamson | int i;
|
1336 | 65501a74 | Alex Williamson | |
1337 | 65501a74 | Alex Williamson | for (i = 0; i < PCI_ROM_SLOT; i++) { |
1338 | 65501a74 | Alex Williamson | VFIOBAR *bar = &vdev->bars[i]; |
1339 | 65501a74 | Alex Williamson | |
1340 | 65501a74 | Alex Williamson | if (!bar->size) {
|
1341 | 65501a74 | Alex Williamson | continue;
|
1342 | 65501a74 | Alex Williamson | } |
1343 | 65501a74 | Alex Williamson | |
1344 | 65501a74 | Alex Williamson | memory_region_set_enabled(&bar->mmap_mem, enabled); |
1345 | 65501a74 | Alex Williamson | if (vdev->msix && vdev->msix->table_bar == i) {
|
1346 | 65501a74 | Alex Williamson | memory_region_set_enabled(&vdev->msix->mmap_mem, enabled); |
1347 | 65501a74 | Alex Williamson | } |
1348 | 65501a74 | Alex Williamson | } |
1349 | 65501a74 | Alex Williamson | } |
1350 | 65501a74 | Alex Williamson | |
1351 | 65501a74 | Alex Williamson | static void vfio_unmap_bar(VFIODevice *vdev, int nr) |
1352 | 65501a74 | Alex Williamson | { |
1353 | 65501a74 | Alex Williamson | VFIOBAR *bar = &vdev->bars[nr]; |
1354 | 65501a74 | Alex Williamson | |
1355 | 65501a74 | Alex Williamson | if (!bar->size) {
|
1356 | 65501a74 | Alex Williamson | return;
|
1357 | 65501a74 | Alex Williamson | } |
1358 | 65501a74 | Alex Williamson | |
1359 | 65501a74 | Alex Williamson | memory_region_del_subregion(&bar->mem, &bar->mmap_mem); |
1360 | 65501a74 | Alex Williamson | munmap(bar->mmap, memory_region_size(&bar->mmap_mem)); |
1361 | 65501a74 | Alex Williamson | |
1362 | 65501a74 | Alex Williamson | if (vdev->msix && vdev->msix->table_bar == nr) {
|
1363 | 65501a74 | Alex Williamson | memory_region_del_subregion(&bar->mem, &vdev->msix->mmap_mem); |
1364 | 65501a74 | Alex Williamson | munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem)); |
1365 | 65501a74 | Alex Williamson | } |
1366 | 65501a74 | Alex Williamson | |
1367 | 65501a74 | Alex Williamson | memory_region_destroy(&bar->mem); |
1368 | 65501a74 | Alex Williamson | } |
1369 | 65501a74 | Alex Williamson | |
1370 | 65501a74 | Alex Williamson | static int vfio_mmap_bar(VFIOBAR *bar, MemoryRegion *mem, MemoryRegion *submem, |
1371 | 65501a74 | Alex Williamson | void **map, size_t size, off_t offset,
|
1372 | 65501a74 | Alex Williamson | const char *name) |
1373 | 65501a74 | Alex Williamson | { |
1374 | 65501a74 | Alex Williamson | int ret = 0; |
1375 | 65501a74 | Alex Williamson | |
1376 | 65501a74 | Alex Williamson | if (size && bar->flags & VFIO_REGION_INFO_FLAG_MMAP) {
|
1377 | 65501a74 | Alex Williamson | int prot = 0; |
1378 | 65501a74 | Alex Williamson | |
1379 | 65501a74 | Alex Williamson | if (bar->flags & VFIO_REGION_INFO_FLAG_READ) {
|
1380 | 65501a74 | Alex Williamson | prot |= PROT_READ; |
1381 | 65501a74 | Alex Williamson | } |
1382 | 65501a74 | Alex Williamson | |
1383 | 65501a74 | Alex Williamson | if (bar->flags & VFIO_REGION_INFO_FLAG_WRITE) {
|
1384 | 65501a74 | Alex Williamson | prot |= PROT_WRITE; |
1385 | 65501a74 | Alex Williamson | } |
1386 | 65501a74 | Alex Williamson | |
1387 | 65501a74 | Alex Williamson | *map = mmap(NULL, size, prot, MAP_SHARED,
|
1388 | 65501a74 | Alex Williamson | bar->fd, bar->fd_offset + offset); |
1389 | 65501a74 | Alex Williamson | if (*map == MAP_FAILED) {
|
1390 | 65501a74 | Alex Williamson | *map = NULL;
|
1391 | 65501a74 | Alex Williamson | ret = -errno; |
1392 | 65501a74 | Alex Williamson | goto empty_region;
|
1393 | 65501a74 | Alex Williamson | } |
1394 | 65501a74 | Alex Williamson | |
1395 | 65501a74 | Alex Williamson | memory_region_init_ram_ptr(submem, name, size, *map); |
1396 | 65501a74 | Alex Williamson | } else {
|
1397 | 65501a74 | Alex Williamson | empty_region:
|
1398 | 65501a74 | Alex Williamson | /* Create a zero sized sub-region to make cleanup easy. */
|
1399 | 65501a74 | Alex Williamson | memory_region_init(submem, name, 0);
|
1400 | 65501a74 | Alex Williamson | } |
1401 | 65501a74 | Alex Williamson | |
1402 | 65501a74 | Alex Williamson | memory_region_add_subregion(mem, offset, submem); |
1403 | 65501a74 | Alex Williamson | |
1404 | 65501a74 | Alex Williamson | return ret;
|
1405 | 65501a74 | Alex Williamson | } |
1406 | 65501a74 | Alex Williamson | |
1407 | 65501a74 | Alex Williamson | static void vfio_map_bar(VFIODevice *vdev, int nr) |
1408 | 65501a74 | Alex Williamson | { |
1409 | 65501a74 | Alex Williamson | VFIOBAR *bar = &vdev->bars[nr]; |
1410 | 65501a74 | Alex Williamson | unsigned size = bar->size;
|
1411 | 65501a74 | Alex Williamson | char name[64]; |
1412 | 65501a74 | Alex Williamson | uint32_t pci_bar; |
1413 | 65501a74 | Alex Williamson | uint8_t type; |
1414 | 65501a74 | Alex Williamson | int ret;
|
1415 | 65501a74 | Alex Williamson | |
1416 | 65501a74 | Alex Williamson | /* Skip both unimplemented BARs and the upper half of 64bit BARS. */
|
1417 | 65501a74 | Alex Williamson | if (!size) {
|
1418 | 65501a74 | Alex Williamson | return;
|
1419 | 65501a74 | Alex Williamson | } |
1420 | 65501a74 | Alex Williamson | |
1421 | 65501a74 | Alex Williamson | snprintf(name, sizeof(name), "VFIO %04x:%02x:%02x.%x BAR %d", |
1422 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
1423 | 65501a74 | Alex Williamson | vdev->host.function, nr); |
1424 | 65501a74 | Alex Williamson | |
1425 | 65501a74 | Alex Williamson | /* Determine what type of BAR this is for registration */
|
1426 | 65501a74 | Alex Williamson | ret = pread(vdev->fd, &pci_bar, sizeof(pci_bar),
|
1427 | 65501a74 | Alex Williamson | vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
|
1428 | 65501a74 | Alex Williamson | if (ret != sizeof(pci_bar)) { |
1429 | 65501a74 | Alex Williamson | error_report("vfio: Failed to read BAR %d (%m)\n", nr);
|
1430 | 65501a74 | Alex Williamson | return;
|
1431 | 65501a74 | Alex Williamson | } |
1432 | 65501a74 | Alex Williamson | |
1433 | 65501a74 | Alex Williamson | pci_bar = le32_to_cpu(pci_bar); |
1434 | 65501a74 | Alex Williamson | type = pci_bar & (pci_bar & PCI_BASE_ADDRESS_SPACE_IO ? |
1435 | 65501a74 | Alex Williamson | ~PCI_BASE_ADDRESS_IO_MASK : ~PCI_BASE_ADDRESS_MEM_MASK); |
1436 | 65501a74 | Alex Williamson | |
1437 | 65501a74 | Alex Williamson | /* A "slow" read/write mapping underlies all BARs */
|
1438 | 65501a74 | Alex Williamson | memory_region_init_io(&bar->mem, &vfio_bar_ops, bar, name, size); |
1439 | 65501a74 | Alex Williamson | pci_register_bar(&vdev->pdev, nr, type, &bar->mem); |
1440 | 65501a74 | Alex Williamson | |
1441 | 65501a74 | Alex Williamson | /*
|
1442 | 65501a74 | Alex Williamson | * We can't mmap areas overlapping the MSIX vector table, so we
|
1443 | 65501a74 | Alex Williamson | * potentially insert a direct-mapped subregion before and after it.
|
1444 | 65501a74 | Alex Williamson | */
|
1445 | 65501a74 | Alex Williamson | if (vdev->msix && vdev->msix->table_bar == nr) {
|
1446 | 65501a74 | Alex Williamson | size = vdev->msix->table_offset & TARGET_PAGE_MASK; |
1447 | 65501a74 | Alex Williamson | } |
1448 | 65501a74 | Alex Williamson | |
1449 | 65501a74 | Alex Williamson | strncat(name, " mmap", sizeof(name) - strlen(name) - 1); |
1450 | 65501a74 | Alex Williamson | if (vfio_mmap_bar(bar, &bar->mem,
|
1451 | 65501a74 | Alex Williamson | &bar->mmap_mem, &bar->mmap, size, 0, name)) {
|
1452 | 65501a74 | Alex Williamson | error_report("%s unsupported. Performance may be slow\n", name);
|
1453 | 65501a74 | Alex Williamson | } |
1454 | 65501a74 | Alex Williamson | |
1455 | 65501a74 | Alex Williamson | if (vdev->msix && vdev->msix->table_bar == nr) {
|
1456 | 65501a74 | Alex Williamson | unsigned start;
|
1457 | 65501a74 | Alex Williamson | |
1458 | 65501a74 | Alex Williamson | start = TARGET_PAGE_ALIGN(vdev->msix->table_offset + |
1459 | 65501a74 | Alex Williamson | (vdev->msix->entries * PCI_MSIX_ENTRY_SIZE)); |
1460 | 65501a74 | Alex Williamson | |
1461 | 65501a74 | Alex Williamson | size = start < bar->size ? bar->size - start : 0;
|
1462 | 65501a74 | Alex Williamson | strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1); |
1463 | 65501a74 | Alex Williamson | /* VFIOMSIXInfo contains another MemoryRegion for this mapping */
|
1464 | 65501a74 | Alex Williamson | if (vfio_mmap_bar(bar, &bar->mem, &vdev->msix->mmap_mem,
|
1465 | 65501a74 | Alex Williamson | &vdev->msix->mmap, size, start, name)) { |
1466 | 65501a74 | Alex Williamson | error_report("%s unsupported. Performance may be slow\n", name);
|
1467 | 65501a74 | Alex Williamson | } |
1468 | 65501a74 | Alex Williamson | } |
1469 | 65501a74 | Alex Williamson | } |
1470 | 65501a74 | Alex Williamson | |
1471 | 65501a74 | Alex Williamson | static void vfio_map_bars(VFIODevice *vdev) |
1472 | 65501a74 | Alex Williamson | { |
1473 | 65501a74 | Alex Williamson | int i;
|
1474 | 65501a74 | Alex Williamson | |
1475 | 65501a74 | Alex Williamson | for (i = 0; i < PCI_ROM_SLOT; i++) { |
1476 | 65501a74 | Alex Williamson | vfio_map_bar(vdev, i); |
1477 | 65501a74 | Alex Williamson | } |
1478 | 65501a74 | Alex Williamson | } |
1479 | 65501a74 | Alex Williamson | |
1480 | 65501a74 | Alex Williamson | static void vfio_unmap_bars(VFIODevice *vdev) |
1481 | 65501a74 | Alex Williamson | { |
1482 | 65501a74 | Alex Williamson | int i;
|
1483 | 65501a74 | Alex Williamson | |
1484 | 65501a74 | Alex Williamson | for (i = 0; i < PCI_ROM_SLOT; i++) { |
1485 | 65501a74 | Alex Williamson | vfio_unmap_bar(vdev, i); |
1486 | 65501a74 | Alex Williamson | } |
1487 | 65501a74 | Alex Williamson | } |
1488 | 65501a74 | Alex Williamson | |
1489 | 65501a74 | Alex Williamson | /*
|
1490 | 65501a74 | Alex Williamson | * General setup
|
1491 | 65501a74 | Alex Williamson | */
|
1492 | 65501a74 | Alex Williamson | static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
|
1493 | 65501a74 | Alex Williamson | { |
1494 | 65501a74 | Alex Williamson | uint8_t tmp, next = 0xff;
|
1495 | 65501a74 | Alex Williamson | |
1496 | 65501a74 | Alex Williamson | for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
|
1497 | 65501a74 | Alex Williamson | tmp = pdev->config[tmp + 1]) {
|
1498 | 65501a74 | Alex Williamson | if (tmp > pos && tmp < next) {
|
1499 | 65501a74 | Alex Williamson | next = tmp; |
1500 | 65501a74 | Alex Williamson | } |
1501 | 65501a74 | Alex Williamson | } |
1502 | 65501a74 | Alex Williamson | |
1503 | 65501a74 | Alex Williamson | return next - pos;
|
1504 | 65501a74 | Alex Williamson | } |
1505 | 65501a74 | Alex Williamson | |
1506 | 65501a74 | Alex Williamson | static int vfio_add_std_cap(VFIODevice *vdev, uint8_t pos) |
1507 | 65501a74 | Alex Williamson | { |
1508 | 65501a74 | Alex Williamson | PCIDevice *pdev = &vdev->pdev; |
1509 | 65501a74 | Alex Williamson | uint8_t cap_id, next, size; |
1510 | 65501a74 | Alex Williamson | int ret;
|
1511 | 65501a74 | Alex Williamson | |
1512 | 65501a74 | Alex Williamson | cap_id = pdev->config[pos]; |
1513 | 65501a74 | Alex Williamson | next = pdev->config[pos + 1];
|
1514 | 65501a74 | Alex Williamson | |
1515 | 65501a74 | Alex Williamson | /*
|
1516 | 65501a74 | Alex Williamson | * If it becomes important to configure capabilities to their actual
|
1517 | 65501a74 | Alex Williamson | * size, use this as the default when it's something we don't recognize.
|
1518 | 65501a74 | Alex Williamson | * Since QEMU doesn't actually handle many of the config accesses,
|
1519 | 65501a74 | Alex Williamson | * exact size doesn't seem worthwhile.
|
1520 | 65501a74 | Alex Williamson | */
|
1521 | 65501a74 | Alex Williamson | size = vfio_std_cap_max_size(pdev, pos); |
1522 | 65501a74 | Alex Williamson | |
1523 | 65501a74 | Alex Williamson | /*
|
1524 | 65501a74 | Alex Williamson | * pci_add_capability always inserts the new capability at the head
|
1525 | 65501a74 | Alex Williamson | * of the chain. Therefore to end up with a chain that matches the
|
1526 | 65501a74 | Alex Williamson | * physical device, we insert from the end by making this recursive.
|
1527 | 65501a74 | Alex Williamson | * This is also why we pre-caclulate size above as cached config space
|
1528 | 65501a74 | Alex Williamson | * will be changed as we unwind the stack.
|
1529 | 65501a74 | Alex Williamson | */
|
1530 | 65501a74 | Alex Williamson | if (next) {
|
1531 | 65501a74 | Alex Williamson | ret = vfio_add_std_cap(vdev, next); |
1532 | 65501a74 | Alex Williamson | if (ret) {
|
1533 | 65501a74 | Alex Williamson | return ret;
|
1534 | 65501a74 | Alex Williamson | } |
1535 | 65501a74 | Alex Williamson | } else {
|
1536 | 65501a74 | Alex Williamson | pdev->config[PCI_CAPABILITY_LIST] = 0; /* Begin the rebuild */ |
1537 | 65501a74 | Alex Williamson | } |
1538 | 65501a74 | Alex Williamson | |
1539 | 65501a74 | Alex Williamson | switch (cap_id) {
|
1540 | 65501a74 | Alex Williamson | case PCI_CAP_ID_MSI:
|
1541 | 65501a74 | Alex Williamson | ret = vfio_setup_msi(vdev, pos); |
1542 | 65501a74 | Alex Williamson | break;
|
1543 | 65501a74 | Alex Williamson | case PCI_CAP_ID_MSIX:
|
1544 | 65501a74 | Alex Williamson | ret = vfio_setup_msix(vdev, pos); |
1545 | 65501a74 | Alex Williamson | break;
|
1546 | 65501a74 | Alex Williamson | default:
|
1547 | 65501a74 | Alex Williamson | ret = pci_add_capability(pdev, cap_id, pos, size); |
1548 | 65501a74 | Alex Williamson | break;
|
1549 | 65501a74 | Alex Williamson | } |
1550 | 65501a74 | Alex Williamson | |
1551 | 65501a74 | Alex Williamson | if (ret < 0) { |
1552 | 65501a74 | Alex Williamson | error_report("vfio: %04x:%02x:%02x.%x Error adding PCI capability "
|
1553 | 65501a74 | Alex Williamson | "0x%x[0x%x]@0x%x: %d\n", vdev->host.domain,
|
1554 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function, |
1555 | 65501a74 | Alex Williamson | cap_id, size, pos, ret); |
1556 | 65501a74 | Alex Williamson | return ret;
|
1557 | 65501a74 | Alex Williamson | } |
1558 | 65501a74 | Alex Williamson | |
1559 | 65501a74 | Alex Williamson | return 0; |
1560 | 65501a74 | Alex Williamson | } |
1561 | 65501a74 | Alex Williamson | |
1562 | 65501a74 | Alex Williamson | static int vfio_add_capabilities(VFIODevice *vdev) |
1563 | 65501a74 | Alex Williamson | { |
1564 | 65501a74 | Alex Williamson | PCIDevice *pdev = &vdev->pdev; |
1565 | 65501a74 | Alex Williamson | |
1566 | 65501a74 | Alex Williamson | if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
|
1567 | 65501a74 | Alex Williamson | !pdev->config[PCI_CAPABILITY_LIST]) { |
1568 | 65501a74 | Alex Williamson | return 0; /* Nothing to add */ |
1569 | 65501a74 | Alex Williamson | } |
1570 | 65501a74 | Alex Williamson | |
1571 | 65501a74 | Alex Williamson | return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
|
1572 | 65501a74 | Alex Williamson | } |
1573 | 65501a74 | Alex Williamson | |
1574 | 65501a74 | Alex Williamson | static int vfio_load_rom(VFIODevice *vdev) |
1575 | 65501a74 | Alex Williamson | { |
1576 | 65501a74 | Alex Williamson | uint64_t size = vdev->rom_size; |
1577 | 65501a74 | Alex Williamson | char name[32]; |
1578 | 65501a74 | Alex Williamson | off_t off = 0, voff = vdev->rom_offset;
|
1579 | 65501a74 | Alex Williamson | ssize_t bytes; |
1580 | 65501a74 | Alex Williamson | void *ptr;
|
1581 | 65501a74 | Alex Williamson | |
1582 | 65501a74 | Alex Williamson | /* If loading ROM from file, pci handles it */
|
1583 | 65501a74 | Alex Williamson | if (vdev->pdev.romfile || !vdev->pdev.rom_bar || !size) {
|
1584 | 65501a74 | Alex Williamson | return 0; |
1585 | 65501a74 | Alex Williamson | } |
1586 | 65501a74 | Alex Williamson | |
1587 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
1588 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
1589 | 65501a74 | Alex Williamson | |
1590 | 65501a74 | Alex Williamson | snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom", |
1591 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
1592 | 65501a74 | Alex Williamson | vdev->host.function); |
1593 | 65501a74 | Alex Williamson | memory_region_init_ram(&vdev->pdev.rom, name, size); |
1594 | 65501a74 | Alex Williamson | ptr = memory_region_get_ram_ptr(&vdev->pdev.rom); |
1595 | 65501a74 | Alex Williamson | memset(ptr, 0xff, size);
|
1596 | 65501a74 | Alex Williamson | |
1597 | 65501a74 | Alex Williamson | while (size) {
|
1598 | 65501a74 | Alex Williamson | bytes = pread(vdev->fd, ptr + off, size, voff + off); |
1599 | 65501a74 | Alex Williamson | if (bytes == 0) { |
1600 | 65501a74 | Alex Williamson | break; /* expect that we could get back less than the ROM BAR */ |
1601 | 65501a74 | Alex Williamson | } else if (bytes > 0) { |
1602 | 65501a74 | Alex Williamson | off += bytes; |
1603 | 65501a74 | Alex Williamson | size -= bytes; |
1604 | 65501a74 | Alex Williamson | } else {
|
1605 | 65501a74 | Alex Williamson | if (errno == EINTR || errno == EAGAIN) {
|
1606 | 65501a74 | Alex Williamson | continue;
|
1607 | 65501a74 | Alex Williamson | } |
1608 | 65501a74 | Alex Williamson | error_report("vfio: Error reading device ROM: %m\n");
|
1609 | 65501a74 | Alex Williamson | memory_region_destroy(&vdev->pdev.rom); |
1610 | 65501a74 | Alex Williamson | return -errno;
|
1611 | 65501a74 | Alex Williamson | } |
1612 | 65501a74 | Alex Williamson | } |
1613 | 65501a74 | Alex Williamson | |
1614 | 65501a74 | Alex Williamson | pci_register_bar(&vdev->pdev, PCI_ROM_SLOT, 0, &vdev->pdev.rom);
|
1615 | 65501a74 | Alex Williamson | vdev->pdev.has_rom = true;
|
1616 | 65501a74 | Alex Williamson | return 0; |
1617 | 65501a74 | Alex Williamson | } |
1618 | 65501a74 | Alex Williamson | |
1619 | 65501a74 | Alex Williamson | static int vfio_connect_container(VFIOGroup *group) |
1620 | 65501a74 | Alex Williamson | { |
1621 | 65501a74 | Alex Williamson | VFIOContainer *container; |
1622 | 65501a74 | Alex Williamson | int ret, fd;
|
1623 | 65501a74 | Alex Williamson | |
1624 | 65501a74 | Alex Williamson | if (group->container) {
|
1625 | 65501a74 | Alex Williamson | return 0; |
1626 | 65501a74 | Alex Williamson | } |
1627 | 65501a74 | Alex Williamson | |
1628 | 65501a74 | Alex Williamson | QLIST_FOREACH(container, &container_list, next) { |
1629 | 65501a74 | Alex Williamson | if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
|
1630 | 65501a74 | Alex Williamson | group->container = container; |
1631 | 65501a74 | Alex Williamson | QLIST_INSERT_HEAD(&container->group_list, group, container_next); |
1632 | 65501a74 | Alex Williamson | return 0; |
1633 | 65501a74 | Alex Williamson | } |
1634 | 65501a74 | Alex Williamson | } |
1635 | 65501a74 | Alex Williamson | |
1636 | 65501a74 | Alex Williamson | fd = qemu_open("/dev/vfio/vfio", O_RDWR);
|
1637 | 65501a74 | Alex Williamson | if (fd < 0) { |
1638 | 65501a74 | Alex Williamson | error_report("vfio: failed to open /dev/vfio/vfio: %m\n");
|
1639 | 65501a74 | Alex Williamson | return -errno;
|
1640 | 65501a74 | Alex Williamson | } |
1641 | 65501a74 | Alex Williamson | |
1642 | 65501a74 | Alex Williamson | ret = ioctl(fd, VFIO_GET_API_VERSION); |
1643 | 65501a74 | Alex Williamson | if (ret != VFIO_API_VERSION) {
|
1644 | 65501a74 | Alex Williamson | error_report("vfio: supported vfio version: %d, "
|
1645 | 65501a74 | Alex Williamson | "reported version: %d\n", VFIO_API_VERSION, ret);
|
1646 | 65501a74 | Alex Williamson | close(fd); |
1647 | 65501a74 | Alex Williamson | return -EINVAL;
|
1648 | 65501a74 | Alex Williamson | } |
1649 | 65501a74 | Alex Williamson | |
1650 | 65501a74 | Alex Williamson | container = g_malloc0(sizeof(*container));
|
1651 | 65501a74 | Alex Williamson | container->fd = fd; |
1652 | 65501a74 | Alex Williamson | |
1653 | 65501a74 | Alex Williamson | if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU)) {
|
1654 | 65501a74 | Alex Williamson | ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); |
1655 | 65501a74 | Alex Williamson | if (ret) {
|
1656 | 65501a74 | Alex Williamson | error_report("vfio: failed to set group container: %m\n");
|
1657 | 65501a74 | Alex Williamson | g_free(container); |
1658 | 65501a74 | Alex Williamson | close(fd); |
1659 | 65501a74 | Alex Williamson | return -errno;
|
1660 | 65501a74 | Alex Williamson | } |
1661 | 65501a74 | Alex Williamson | |
1662 | 65501a74 | Alex Williamson | ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU); |
1663 | 65501a74 | Alex Williamson | if (ret) {
|
1664 | 65501a74 | Alex Williamson | error_report("vfio: failed to set iommu for container: %m\n");
|
1665 | 65501a74 | Alex Williamson | g_free(container); |
1666 | 65501a74 | Alex Williamson | close(fd); |
1667 | 65501a74 | Alex Williamson | return -errno;
|
1668 | 65501a74 | Alex Williamson | } |
1669 | 65501a74 | Alex Williamson | |
1670 | 65501a74 | Alex Williamson | container->iommu_data.listener = vfio_memory_listener; |
1671 | 65501a74 | Alex Williamson | container->iommu_data.release = vfio_listener_release; |
1672 | 65501a74 | Alex Williamson | |
1673 | f6790af6 | Avi Kivity | memory_listener_register(&container->iommu_data.listener, &address_space_memory); |
1674 | 65501a74 | Alex Williamson | } else {
|
1675 | 65501a74 | Alex Williamson | error_report("vfio: No available IOMMU models\n");
|
1676 | 65501a74 | Alex Williamson | g_free(container); |
1677 | 65501a74 | Alex Williamson | close(fd); |
1678 | 65501a74 | Alex Williamson | return -EINVAL;
|
1679 | 65501a74 | Alex Williamson | } |
1680 | 65501a74 | Alex Williamson | |
1681 | 65501a74 | Alex Williamson | QLIST_INIT(&container->group_list); |
1682 | 65501a74 | Alex Williamson | QLIST_INSERT_HEAD(&container_list, container, next); |
1683 | 65501a74 | Alex Williamson | |
1684 | 65501a74 | Alex Williamson | group->container = container; |
1685 | 65501a74 | Alex Williamson | QLIST_INSERT_HEAD(&container->group_list, group, container_next); |
1686 | 65501a74 | Alex Williamson | |
1687 | 65501a74 | Alex Williamson | return 0; |
1688 | 65501a74 | Alex Williamson | } |
1689 | 65501a74 | Alex Williamson | |
1690 | 65501a74 | Alex Williamson | static void vfio_disconnect_container(VFIOGroup *group) |
1691 | 65501a74 | Alex Williamson | { |
1692 | 65501a74 | Alex Williamson | VFIOContainer *container = group->container; |
1693 | 65501a74 | Alex Williamson | |
1694 | 65501a74 | Alex Williamson | if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
|
1695 | 65501a74 | Alex Williamson | error_report("vfio: error disconnecting group %d from container\n",
|
1696 | 65501a74 | Alex Williamson | group->groupid); |
1697 | 65501a74 | Alex Williamson | } |
1698 | 65501a74 | Alex Williamson | |
1699 | 65501a74 | Alex Williamson | QLIST_REMOVE(group, container_next); |
1700 | 65501a74 | Alex Williamson | group->container = NULL;
|
1701 | 65501a74 | Alex Williamson | |
1702 | 65501a74 | Alex Williamson | if (QLIST_EMPTY(&container->group_list)) {
|
1703 | 65501a74 | Alex Williamson | if (container->iommu_data.release) {
|
1704 | 65501a74 | Alex Williamson | container->iommu_data.release(container); |
1705 | 65501a74 | Alex Williamson | } |
1706 | 65501a74 | Alex Williamson | QLIST_REMOVE(container, next); |
1707 | 65501a74 | Alex Williamson | DPRINTF("vfio_disconnect_container: close container->fd\n");
|
1708 | 65501a74 | Alex Williamson | close(container->fd); |
1709 | 65501a74 | Alex Williamson | g_free(container); |
1710 | 65501a74 | Alex Williamson | } |
1711 | 65501a74 | Alex Williamson | } |
1712 | 65501a74 | Alex Williamson | |
1713 | 65501a74 | Alex Williamson | static VFIOGroup *vfio_get_group(int groupid) |
1714 | 65501a74 | Alex Williamson | { |
1715 | 65501a74 | Alex Williamson | VFIOGroup *group; |
1716 | 65501a74 | Alex Williamson | char path[32]; |
1717 | 65501a74 | Alex Williamson | struct vfio_group_status status = { .argsz = sizeof(status) }; |
1718 | 65501a74 | Alex Williamson | |
1719 | 65501a74 | Alex Williamson | QLIST_FOREACH(group, &group_list, next) { |
1720 | 65501a74 | Alex Williamson | if (group->groupid == groupid) {
|
1721 | 65501a74 | Alex Williamson | return group;
|
1722 | 65501a74 | Alex Williamson | } |
1723 | 65501a74 | Alex Williamson | } |
1724 | 65501a74 | Alex Williamson | |
1725 | 65501a74 | Alex Williamson | group = g_malloc0(sizeof(*group));
|
1726 | 65501a74 | Alex Williamson | |
1727 | 65501a74 | Alex Williamson | snprintf(path, sizeof(path), "/dev/vfio/%d", groupid); |
1728 | 65501a74 | Alex Williamson | group->fd = qemu_open(path, O_RDWR); |
1729 | 65501a74 | Alex Williamson | if (group->fd < 0) { |
1730 | 65501a74 | Alex Williamson | error_report("vfio: error opening %s: %m\n", path);
|
1731 | 65501a74 | Alex Williamson | g_free(group); |
1732 | 65501a74 | Alex Williamson | return NULL; |
1733 | 65501a74 | Alex Williamson | } |
1734 | 65501a74 | Alex Williamson | |
1735 | 65501a74 | Alex Williamson | if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
|
1736 | 65501a74 | Alex Williamson | error_report("vfio: error getting group status: %m\n");
|
1737 | 65501a74 | Alex Williamson | close(group->fd); |
1738 | 65501a74 | Alex Williamson | g_free(group); |
1739 | 65501a74 | Alex Williamson | return NULL; |
1740 | 65501a74 | Alex Williamson | } |
1741 | 65501a74 | Alex Williamson | |
1742 | 65501a74 | Alex Williamson | if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
|
1743 | 65501a74 | Alex Williamson | error_report("vfio: error, group %d is not viable, please ensure "
|
1744 | 65501a74 | Alex Williamson | "all devices within the iommu_group are bound to their "
|
1745 | 65501a74 | Alex Williamson | "vfio bus driver.\n", groupid);
|
1746 | 65501a74 | Alex Williamson | close(group->fd); |
1747 | 65501a74 | Alex Williamson | g_free(group); |
1748 | 65501a74 | Alex Williamson | return NULL; |
1749 | 65501a74 | Alex Williamson | } |
1750 | 65501a74 | Alex Williamson | |
1751 | 65501a74 | Alex Williamson | group->groupid = groupid; |
1752 | 65501a74 | Alex Williamson | QLIST_INIT(&group->device_list); |
1753 | 65501a74 | Alex Williamson | |
1754 | 65501a74 | Alex Williamson | if (vfio_connect_container(group)) {
|
1755 | 65501a74 | Alex Williamson | error_report("vfio: failed to setup container for group %d\n", groupid);
|
1756 | 65501a74 | Alex Williamson | close(group->fd); |
1757 | 65501a74 | Alex Williamson | g_free(group); |
1758 | 65501a74 | Alex Williamson | return NULL; |
1759 | 65501a74 | Alex Williamson | } |
1760 | 65501a74 | Alex Williamson | |
1761 | 65501a74 | Alex Williamson | QLIST_INSERT_HEAD(&group_list, group, next); |
1762 | 65501a74 | Alex Williamson | |
1763 | 65501a74 | Alex Williamson | return group;
|
1764 | 65501a74 | Alex Williamson | } |
1765 | 65501a74 | Alex Williamson | |
1766 | 65501a74 | Alex Williamson | static void vfio_put_group(VFIOGroup *group) |
1767 | 65501a74 | Alex Williamson | { |
1768 | 65501a74 | Alex Williamson | if (!QLIST_EMPTY(&group->device_list)) {
|
1769 | 65501a74 | Alex Williamson | return;
|
1770 | 65501a74 | Alex Williamson | } |
1771 | 65501a74 | Alex Williamson | |
1772 | 65501a74 | Alex Williamson | vfio_disconnect_container(group); |
1773 | 65501a74 | Alex Williamson | QLIST_REMOVE(group, next); |
1774 | 65501a74 | Alex Williamson | DPRINTF("vfio_put_group: close group->fd\n");
|
1775 | 65501a74 | Alex Williamson | close(group->fd); |
1776 | 65501a74 | Alex Williamson | g_free(group); |
1777 | 65501a74 | Alex Williamson | } |
1778 | 65501a74 | Alex Williamson | |
1779 | 65501a74 | Alex Williamson | static int vfio_get_device(VFIOGroup *group, const char *name, VFIODevice *vdev) |
1780 | 65501a74 | Alex Williamson | { |
1781 | 65501a74 | Alex Williamson | struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) }; |
1782 | 65501a74 | Alex Williamson | struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) }; |
1783 | 65501a74 | Alex Williamson | int ret, i;
|
1784 | 65501a74 | Alex Williamson | |
1785 | 65501a74 | Alex Williamson | ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name); |
1786 | 65501a74 | Alex Williamson | if (ret < 0) { |
1787 | 65501a74 | Alex Williamson | error_report("vfio: error getting device %s from group %d: %m\n",
|
1788 | 65501a74 | Alex Williamson | name, group->groupid); |
1789 | 65501a74 | Alex Williamson | error_report("Verify all devices in group %d are bound to vfio-pci "
|
1790 | 65501a74 | Alex Williamson | "or pci-stub and not already in use\n", group->groupid);
|
1791 | 65501a74 | Alex Williamson | return ret;
|
1792 | 65501a74 | Alex Williamson | } |
1793 | 65501a74 | Alex Williamson | |
1794 | 65501a74 | Alex Williamson | vdev->fd = ret; |
1795 | 65501a74 | Alex Williamson | vdev->group = group; |
1796 | 65501a74 | Alex Williamson | QLIST_INSERT_HEAD(&group->device_list, vdev, next); |
1797 | 65501a74 | Alex Williamson | |
1798 | 65501a74 | Alex Williamson | /* Sanity check device */
|
1799 | 65501a74 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_GET_INFO, &dev_info); |
1800 | 65501a74 | Alex Williamson | if (ret) {
|
1801 | 65501a74 | Alex Williamson | error_report("vfio: error getting device info: %m\n");
|
1802 | 65501a74 | Alex Williamson | goto error;
|
1803 | 65501a74 | Alex Williamson | } |
1804 | 65501a74 | Alex Williamson | |
1805 | 65501a74 | Alex Williamson | DPRINTF("Device %s flags: %u, regions: %u, irgs: %u\n", name,
|
1806 | 65501a74 | Alex Williamson | dev_info.flags, dev_info.num_regions, dev_info.num_irqs); |
1807 | 65501a74 | Alex Williamson | |
1808 | 65501a74 | Alex Williamson | if (!(dev_info.flags & VFIO_DEVICE_FLAGS_PCI)) {
|
1809 | 65501a74 | Alex Williamson | error_report("vfio: Um, this isn't a PCI device\n");
|
1810 | 65501a74 | Alex Williamson | goto error;
|
1811 | 65501a74 | Alex Williamson | } |
1812 | 65501a74 | Alex Williamson | |
1813 | 65501a74 | Alex Williamson | vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET); |
1814 | 65501a74 | Alex Williamson | if (!vdev->reset_works) {
|
1815 | 65501a74 | Alex Williamson | error_report("Warning, device %s does not support reset\n", name);
|
1816 | 65501a74 | Alex Williamson | } |
1817 | 65501a74 | Alex Williamson | |
1818 | 65501a74 | Alex Williamson | if (dev_info.num_regions != VFIO_PCI_NUM_REGIONS) {
|
1819 | 65501a74 | Alex Williamson | error_report("vfio: unexpected number of io regions %u\n",
|
1820 | 65501a74 | Alex Williamson | dev_info.num_regions); |
1821 | 65501a74 | Alex Williamson | goto error;
|
1822 | 65501a74 | Alex Williamson | } |
1823 | 65501a74 | Alex Williamson | |
1824 | 65501a74 | Alex Williamson | if (dev_info.num_irqs != VFIO_PCI_NUM_IRQS) {
|
1825 | 65501a74 | Alex Williamson | error_report("vfio: unexpected number of irqs %u\n", dev_info.num_irqs);
|
1826 | 65501a74 | Alex Williamson | goto error;
|
1827 | 65501a74 | Alex Williamson | } |
1828 | 65501a74 | Alex Williamson | |
1829 | 65501a74 | Alex Williamson | for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
|
1830 | 65501a74 | Alex Williamson | reg_info.index = i; |
1831 | 65501a74 | Alex Williamson | |
1832 | 65501a74 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info); |
1833 | 65501a74 | Alex Williamson | if (ret) {
|
1834 | 65501a74 | Alex Williamson | error_report("vfio: Error getting region %d info: %m\n", i);
|
1835 | 65501a74 | Alex Williamson | goto error;
|
1836 | 65501a74 | Alex Williamson | } |
1837 | 65501a74 | Alex Williamson | |
1838 | 65501a74 | Alex Williamson | DPRINTF("Device %s region %d:\n", name, i);
|
1839 | 65501a74 | Alex Williamson | DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
1840 | 65501a74 | Alex Williamson | (unsigned long)reg_info.size, (unsigned long)reg_info.offset, |
1841 | 65501a74 | Alex Williamson | (unsigned long)reg_info.flags); |
1842 | 65501a74 | Alex Williamson | |
1843 | 65501a74 | Alex Williamson | vdev->bars[i].flags = reg_info.flags; |
1844 | 65501a74 | Alex Williamson | vdev->bars[i].size = reg_info.size; |
1845 | 65501a74 | Alex Williamson | vdev->bars[i].fd_offset = reg_info.offset; |
1846 | 65501a74 | Alex Williamson | vdev->bars[i].fd = vdev->fd; |
1847 | 65501a74 | Alex Williamson | vdev->bars[i].nr = i; |
1848 | 65501a74 | Alex Williamson | } |
1849 | 65501a74 | Alex Williamson | |
1850 | 65501a74 | Alex Williamson | reg_info.index = VFIO_PCI_ROM_REGION_INDEX; |
1851 | 65501a74 | Alex Williamson | |
1852 | 65501a74 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info); |
1853 | 65501a74 | Alex Williamson | if (ret) {
|
1854 | 65501a74 | Alex Williamson | error_report("vfio: Error getting ROM info: %m\n");
|
1855 | 65501a74 | Alex Williamson | goto error;
|
1856 | 65501a74 | Alex Williamson | } |
1857 | 65501a74 | Alex Williamson | |
1858 | 65501a74 | Alex Williamson | DPRINTF("Device %s ROM:\n", name);
|
1859 | 65501a74 | Alex Williamson | DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
1860 | 65501a74 | Alex Williamson | (unsigned long)reg_info.size, (unsigned long)reg_info.offset, |
1861 | 65501a74 | Alex Williamson | (unsigned long)reg_info.flags); |
1862 | 65501a74 | Alex Williamson | |
1863 | 65501a74 | Alex Williamson | vdev->rom_size = reg_info.size; |
1864 | 65501a74 | Alex Williamson | vdev->rom_offset = reg_info.offset; |
1865 | 65501a74 | Alex Williamson | |
1866 | 65501a74 | Alex Williamson | reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX; |
1867 | 65501a74 | Alex Williamson | |
1868 | 65501a74 | Alex Williamson | ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info); |
1869 | 65501a74 | Alex Williamson | if (ret) {
|
1870 | 65501a74 | Alex Williamson | error_report("vfio: Error getting config info: %m\n");
|
1871 | 65501a74 | Alex Williamson | goto error;
|
1872 | 65501a74 | Alex Williamson | } |
1873 | 65501a74 | Alex Williamson | |
1874 | 65501a74 | Alex Williamson | DPRINTF("Device %s config:\n", name);
|
1875 | 65501a74 | Alex Williamson | DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
1876 | 65501a74 | Alex Williamson | (unsigned long)reg_info.size, (unsigned long)reg_info.offset, |
1877 | 65501a74 | Alex Williamson | (unsigned long)reg_info.flags); |
1878 | 65501a74 | Alex Williamson | |
1879 | 65501a74 | Alex Williamson | vdev->config_size = reg_info.size; |
1880 | 65501a74 | Alex Williamson | vdev->config_offset = reg_info.offset; |
1881 | 65501a74 | Alex Williamson | |
1882 | 65501a74 | Alex Williamson | error:
|
1883 | 65501a74 | Alex Williamson | if (ret) {
|
1884 | 65501a74 | Alex Williamson | QLIST_REMOVE(vdev, next); |
1885 | 65501a74 | Alex Williamson | vdev->group = NULL;
|
1886 | 65501a74 | Alex Williamson | close(vdev->fd); |
1887 | 65501a74 | Alex Williamson | } |
1888 | 65501a74 | Alex Williamson | return ret;
|
1889 | 65501a74 | Alex Williamson | } |
1890 | 65501a74 | Alex Williamson | |
1891 | 65501a74 | Alex Williamson | static void vfio_put_device(VFIODevice *vdev) |
1892 | 65501a74 | Alex Williamson | { |
1893 | 65501a74 | Alex Williamson | QLIST_REMOVE(vdev, next); |
1894 | 65501a74 | Alex Williamson | vdev->group = NULL;
|
1895 | 65501a74 | Alex Williamson | DPRINTF("vfio_put_device: close vdev->fd\n");
|
1896 | 65501a74 | Alex Williamson | close(vdev->fd); |
1897 | 65501a74 | Alex Williamson | if (vdev->msix) {
|
1898 | 65501a74 | Alex Williamson | g_free(vdev->msix); |
1899 | 65501a74 | Alex Williamson | vdev->msix = NULL;
|
1900 | 65501a74 | Alex Williamson | } |
1901 | 65501a74 | Alex Williamson | } |
1902 | 65501a74 | Alex Williamson | |
1903 | 65501a74 | Alex Williamson | static int vfio_initfn(PCIDevice *pdev) |
1904 | 65501a74 | Alex Williamson | { |
1905 | 65501a74 | Alex Williamson | VFIODevice *pvdev, *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
1906 | 65501a74 | Alex Williamson | VFIOGroup *group; |
1907 | 65501a74 | Alex Williamson | char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
|
1908 | 65501a74 | Alex Williamson | ssize_t len; |
1909 | 65501a74 | Alex Williamson | struct stat st;
|
1910 | 65501a74 | Alex Williamson | int groupid;
|
1911 | 65501a74 | Alex Williamson | int ret;
|
1912 | 65501a74 | Alex Williamson | |
1913 | 65501a74 | Alex Williamson | /* Check that the host device exists */
|
1914 | 65501a74 | Alex Williamson | snprintf(path, sizeof(path),
|
1915 | 65501a74 | Alex Williamson | "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
|
1916 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
1917 | 65501a74 | Alex Williamson | vdev->host.function); |
1918 | 65501a74 | Alex Williamson | if (stat(path, &st) < 0) { |
1919 | 65501a74 | Alex Williamson | error_report("vfio: error: no such host device: %s\n", path);
|
1920 | 65501a74 | Alex Williamson | return -errno;
|
1921 | 65501a74 | Alex Williamson | } |
1922 | 65501a74 | Alex Williamson | |
1923 | 65501a74 | Alex Williamson | strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1); |
1924 | 65501a74 | Alex Williamson | |
1925 | 65501a74 | Alex Williamson | len = readlink(path, iommu_group_path, PATH_MAX); |
1926 | 65501a74 | Alex Williamson | if (len <= 0) { |
1927 | 65501a74 | Alex Williamson | error_report("vfio: error no iommu_group for device\n");
|
1928 | 65501a74 | Alex Williamson | return -errno;
|
1929 | 65501a74 | Alex Williamson | } |
1930 | 65501a74 | Alex Williamson | |
1931 | 65501a74 | Alex Williamson | iommu_group_path[len] = 0;
|
1932 | 65501a74 | Alex Williamson | group_name = basename(iommu_group_path); |
1933 | 65501a74 | Alex Williamson | |
1934 | 65501a74 | Alex Williamson | if (sscanf(group_name, "%d", &groupid) != 1) { |
1935 | 65501a74 | Alex Williamson | error_report("vfio: error reading %s: %m\n", path);
|
1936 | 65501a74 | Alex Williamson | return -errno;
|
1937 | 65501a74 | Alex Williamson | } |
1938 | 65501a74 | Alex Williamson | |
1939 | 65501a74 | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x) group %d\n", __func__, vdev->host.domain,
|
1940 | 65501a74 | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function, groupid); |
1941 | 65501a74 | Alex Williamson | |
1942 | 65501a74 | Alex Williamson | group = vfio_get_group(groupid); |
1943 | 65501a74 | Alex Williamson | if (!group) {
|
1944 | 65501a74 | Alex Williamson | error_report("vfio: failed to get group %d\n", groupid);
|
1945 | 65501a74 | Alex Williamson | return -ENOENT;
|
1946 | 65501a74 | Alex Williamson | } |
1947 | 65501a74 | Alex Williamson | |
1948 | 65501a74 | Alex Williamson | snprintf(path, sizeof(path), "%04x:%02x:%02x.%01x", |
1949 | 65501a74 | Alex Williamson | vdev->host.domain, vdev->host.bus, vdev->host.slot, |
1950 | 65501a74 | Alex Williamson | vdev->host.function); |
1951 | 65501a74 | Alex Williamson | |
1952 | 65501a74 | Alex Williamson | QLIST_FOREACH(pvdev, &group->device_list, next) { |
1953 | 65501a74 | Alex Williamson | if (pvdev->host.domain == vdev->host.domain &&
|
1954 | 65501a74 | Alex Williamson | pvdev->host.bus == vdev->host.bus && |
1955 | 65501a74 | Alex Williamson | pvdev->host.slot == vdev->host.slot && |
1956 | 65501a74 | Alex Williamson | pvdev->host.function == vdev->host.function) { |
1957 | 65501a74 | Alex Williamson | |
1958 | 65501a74 | Alex Williamson | error_report("vfio: error: device %s is already attached\n", path);
|
1959 | 65501a74 | Alex Williamson | vfio_put_group(group); |
1960 | 65501a74 | Alex Williamson | return -EBUSY;
|
1961 | 65501a74 | Alex Williamson | } |
1962 | 65501a74 | Alex Williamson | } |
1963 | 65501a74 | Alex Williamson | |
1964 | 65501a74 | Alex Williamson | ret = vfio_get_device(group, path, vdev); |
1965 | 65501a74 | Alex Williamson | if (ret) {
|
1966 | 65501a74 | Alex Williamson | error_report("vfio: failed to get device %s\n", path);
|
1967 | 65501a74 | Alex Williamson | vfio_put_group(group); |
1968 | 65501a74 | Alex Williamson | return ret;
|
1969 | 65501a74 | Alex Williamson | } |
1970 | 65501a74 | Alex Williamson | |
1971 | 65501a74 | Alex Williamson | /* Get a copy of config space */
|
1972 | 65501a74 | Alex Williamson | ret = pread(vdev->fd, vdev->pdev.config, |
1973 | 65501a74 | Alex Williamson | MIN(pci_config_size(&vdev->pdev), vdev->config_size), |
1974 | 65501a74 | Alex Williamson | vdev->config_offset); |
1975 | 65501a74 | Alex Williamson | if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) { |
1976 | 65501a74 | Alex Williamson | ret = ret < 0 ? -errno : -EFAULT;
|
1977 | 65501a74 | Alex Williamson | error_report("vfio: Failed to read device config space\n");
|
1978 | 65501a74 | Alex Williamson | goto out_put;
|
1979 | 65501a74 | Alex Williamson | } |
1980 | 65501a74 | Alex Williamson | |
1981 | 65501a74 | Alex Williamson | /*
|
1982 | 65501a74 | Alex Williamson | * Clear host resource mapping info. If we choose not to register a
|
1983 | 65501a74 | Alex Williamson | * BAR, such as might be the case with the option ROM, we can get
|
1984 | 65501a74 | Alex Williamson | * confusing, unwritable, residual addresses from the host here.
|
1985 | 65501a74 | Alex Williamson | */
|
1986 | 65501a74 | Alex Williamson | memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24); |
1987 | 65501a74 | Alex Williamson | memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4); |
1988 | 65501a74 | Alex Williamson | |
1989 | 65501a74 | Alex Williamson | vfio_load_rom(vdev); |
1990 | 65501a74 | Alex Williamson | |
1991 | 65501a74 | Alex Williamson | ret = vfio_early_setup_msix(vdev); |
1992 | 65501a74 | Alex Williamson | if (ret) {
|
1993 | 65501a74 | Alex Williamson | goto out_put;
|
1994 | 65501a74 | Alex Williamson | } |
1995 | 65501a74 | Alex Williamson | |
1996 | 65501a74 | Alex Williamson | vfio_map_bars(vdev); |
1997 | 65501a74 | Alex Williamson | |
1998 | 65501a74 | Alex Williamson | ret = vfio_add_capabilities(vdev); |
1999 | 65501a74 | Alex Williamson | if (ret) {
|
2000 | 65501a74 | Alex Williamson | goto out_teardown;
|
2001 | 65501a74 | Alex Williamson | } |
2002 | 65501a74 | Alex Williamson | |
2003 | 65501a74 | Alex Williamson | if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) { |
2004 | ea486926 | Alex Williamson | vdev->intx.mmap_timer = qemu_new_timer_ms(vm_clock, |
2005 | ea486926 | Alex Williamson | vfio_intx_mmap_enable, vdev); |
2006 | e1d1e586 | Alex Williamson | pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_update_irq); |
2007 | 65501a74 | Alex Williamson | ret = vfio_enable_intx(vdev); |
2008 | 65501a74 | Alex Williamson | if (ret) {
|
2009 | 65501a74 | Alex Williamson | goto out_teardown;
|
2010 | 65501a74 | Alex Williamson | } |
2011 | 65501a74 | Alex Williamson | } |
2012 | 65501a74 | Alex Williamson | |
2013 | 65501a74 | Alex Williamson | return 0; |
2014 | 65501a74 | Alex Williamson | |
2015 | 65501a74 | Alex Williamson | out_teardown:
|
2016 | 65501a74 | Alex Williamson | pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
2017 | 65501a74 | Alex Williamson | vfio_teardown_msi(vdev); |
2018 | 65501a74 | Alex Williamson | vfio_unmap_bars(vdev); |
2019 | 65501a74 | Alex Williamson | out_put:
|
2020 | 65501a74 | Alex Williamson | vfio_put_device(vdev); |
2021 | 65501a74 | Alex Williamson | vfio_put_group(group); |
2022 | 65501a74 | Alex Williamson | return ret;
|
2023 | 65501a74 | Alex Williamson | } |
2024 | 65501a74 | Alex Williamson | |
2025 | 65501a74 | Alex Williamson | static void vfio_exitfn(PCIDevice *pdev) |
2026 | 65501a74 | Alex Williamson | { |
2027 | 65501a74 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
2028 | 65501a74 | Alex Williamson | VFIOGroup *group = vdev->group; |
2029 | 65501a74 | Alex Williamson | |
2030 | 65501a74 | Alex Williamson | pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
2031 | 65501a74 | Alex Williamson | vfio_disable_interrupts(vdev); |
2032 | ea486926 | Alex Williamson | if (vdev->intx.mmap_timer) {
|
2033 | ea486926 | Alex Williamson | qemu_free_timer(vdev->intx.mmap_timer); |
2034 | ea486926 | Alex Williamson | } |
2035 | 65501a74 | Alex Williamson | vfio_teardown_msi(vdev); |
2036 | 65501a74 | Alex Williamson | vfio_unmap_bars(vdev); |
2037 | 65501a74 | Alex Williamson | vfio_put_device(vdev); |
2038 | 65501a74 | Alex Williamson | vfio_put_group(group); |
2039 | 65501a74 | Alex Williamson | } |
2040 | 65501a74 | Alex Williamson | |
2041 | 65501a74 | Alex Williamson | static void vfio_pci_reset(DeviceState *dev) |
2042 | 65501a74 | Alex Williamson | { |
2043 | 65501a74 | Alex Williamson | PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev); |
2044 | 65501a74 | Alex Williamson | VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
2045 | 5834a83f | Alex Williamson | uint16_t cmd; |
2046 | 65501a74 | Alex Williamson | |
2047 | 5834a83f | Alex Williamson | DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
2048 | 5834a83f | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
2049 | 5834a83f | Alex Williamson | |
2050 | 5834a83f | Alex Williamson | vfio_disable_interrupts(vdev); |
2051 | 65501a74 | Alex Williamson | |
2052 | 5834a83f | Alex Williamson | /*
|
2053 | 5834a83f | Alex Williamson | * Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
|
2054 | 5834a83f | Alex Williamson | * Also put INTx Disable in known state.
|
2055 | 5834a83f | Alex Williamson | */
|
2056 | 5834a83f | Alex Williamson | cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
|
2057 | 5834a83f | Alex Williamson | cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | |
2058 | 5834a83f | Alex Williamson | PCI_COMMAND_INTX_DISABLE); |
2059 | 5834a83f | Alex Williamson | vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
|
2060 | 5834a83f | Alex Williamson | |
2061 | 5834a83f | Alex Williamson | if (vdev->reset_works) {
|
2062 | 5834a83f | Alex Williamson | if (ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
|
2063 | 5834a83f | Alex Williamson | error_report("vfio: Error unable to reset physical device "
|
2064 | 5834a83f | Alex Williamson | "(%04x:%02x:%02x.%x): %m\n", vdev->host.domain,
|
2065 | 5834a83f | Alex Williamson | vdev->host.bus, vdev->host.slot, vdev->host.function); |
2066 | 5834a83f | Alex Williamson | } |
2067 | 65501a74 | Alex Williamson | } |
2068 | 5834a83f | Alex Williamson | |
2069 | 5834a83f | Alex Williamson | vfio_enable_intx(vdev); |
2070 | 65501a74 | Alex Williamson | } |
2071 | 65501a74 | Alex Williamson | |
2072 | 65501a74 | Alex Williamson | static Property vfio_pci_dev_properties[] = {
|
2073 | 65501a74 | Alex Williamson | DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIODevice, host),
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2074 | ea486926 | Alex Williamson | DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIODevice,
|
2075 | ea486926 | Alex Williamson | intx.mmap_timeout, 1100),
|
2076 | 65501a74 | Alex Williamson | /*
|
2077 | 65501a74 | Alex Williamson | * TODO - support passed fds... is this necessary?
|
2078 | 65501a74 | Alex Williamson | * DEFINE_PROP_STRING("vfiofd", VFIODevice, vfiofd_name),
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2079 | 65501a74 | Alex Williamson | * DEFINE_PROP_STRING("vfiogroupfd, VFIODevice, vfiogroupfd_name),
|
2080 | 65501a74 | Alex Williamson | */
|
2081 | 65501a74 | Alex Williamson | DEFINE_PROP_END_OF_LIST(), |
2082 | 65501a74 | Alex Williamson | }; |
2083 | 65501a74 | Alex Williamson | |
2084 | d9f0e638 | Alex Williamson | static const VMStateDescription vfio_pci_vmstate = { |
2085 | d9f0e638 | Alex Williamson | .name = "vfio-pci",
|
2086 | d9f0e638 | Alex Williamson | .unmigratable = 1,
|
2087 | d9f0e638 | Alex Williamson | }; |
2088 | 65501a74 | Alex Williamson | |
2089 | 65501a74 | Alex Williamson | static void vfio_pci_dev_class_init(ObjectClass *klass, void *data) |
2090 | 65501a74 | Alex Williamson | { |
2091 | 65501a74 | Alex Williamson | DeviceClass *dc = DEVICE_CLASS(klass); |
2092 | 65501a74 | Alex Williamson | PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass); |
2093 | 65501a74 | Alex Williamson | |
2094 | 65501a74 | Alex Williamson | dc->reset = vfio_pci_reset; |
2095 | 65501a74 | Alex Williamson | dc->props = vfio_pci_dev_properties; |
2096 | d9f0e638 | Alex Williamson | dc->vmsd = &vfio_pci_vmstate; |
2097 | d9f0e638 | Alex Williamson | dc->desc = "VFIO-based PCI device assignment";
|
2098 | 65501a74 | Alex Williamson | pdc->init = vfio_initfn; |
2099 | 65501a74 | Alex Williamson | pdc->exit = vfio_exitfn; |
2100 | 65501a74 | Alex Williamson | pdc->config_read = vfio_pci_read_config; |
2101 | 65501a74 | Alex Williamson | pdc->config_write = vfio_pci_write_config; |
2102 | 65501a74 | Alex Williamson | } |
2103 | 65501a74 | Alex Williamson | |
2104 | 65501a74 | Alex Williamson | static const TypeInfo vfio_pci_dev_info = { |
2105 | 65501a74 | Alex Williamson | .name = "vfio-pci",
|
2106 | 65501a74 | Alex Williamson | .parent = TYPE_PCI_DEVICE, |
2107 | 65501a74 | Alex Williamson | .instance_size = sizeof(VFIODevice),
|
2108 | 65501a74 | Alex Williamson | .class_init = vfio_pci_dev_class_init, |
2109 | 65501a74 | Alex Williamson | }; |
2110 | 65501a74 | Alex Williamson | |
2111 | 65501a74 | Alex Williamson | static void register_vfio_pci_dev_type(void) |
2112 | 65501a74 | Alex Williamson | { |
2113 | 65501a74 | Alex Williamson | type_register_static(&vfio_pci_dev_info); |
2114 | 65501a74 | Alex Williamson | } |
2115 | 65501a74 | Alex Williamson | |
2116 | 65501a74 | Alex Williamson | type_init(register_vfio_pci_dev_type) |