We don't seem to run into any sign extension problems, but unsigned looks more correct. Signed-off-by: Alex williamson <alex.williamson@redhat.com>
1963 lines
58 KiB
C
1963 lines
58 KiB
C
/*
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* vfio based device assignment support
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*
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* Copyright Red Hat, Inc. 2012
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*
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* Authors:
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* Alex Williamson <alex.williamson@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Based on qemu-kvm device-assignment:
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* Adapted for KVM by Qumranet.
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* Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
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* Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
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* Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
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* Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
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* Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
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*/
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#include <dirent.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <linux/vfio.h>
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#include "config.h"
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#include "event_notifier.h"
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#include "exec-memory.h"
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#include "kvm.h"
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#include "memory.h"
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#include "msi.h"
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#include "msix.h"
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#include "pci.h"
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#include "qemu-common.h"
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#include "qemu-error.h"
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#include "qemu-queue.h"
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#include "range.h"
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/* #define DEBUG_VFIO */
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#ifdef DEBUG_VFIO
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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typedef struct VFIOBAR {
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off_t fd_offset; /* offset of BAR within device fd */
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int fd; /* device fd, allows us to pass VFIOBAR as opaque data */
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MemoryRegion mem; /* slow, read/write access */
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MemoryRegion mmap_mem; /* direct mapped access */
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void *mmap;
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size_t size;
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uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
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uint8_t nr; /* cache the BAR number for debug */
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} VFIOBAR;
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typedef struct VFIOINTx {
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bool pending; /* interrupt pending */
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bool kvm_accel; /* set when QEMU bypass through KVM enabled */
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uint8_t pin; /* which pin to pull for qemu_set_irq */
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EventNotifier interrupt; /* eventfd triggered on interrupt */
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EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
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PCIINTxRoute route; /* routing info for QEMU bypass */
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uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
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QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
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} VFIOINTx;
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struct VFIODevice;
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typedef struct VFIOMSIVector {
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EventNotifier interrupt; /* eventfd triggered on interrupt */
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struct VFIODevice *vdev; /* back pointer to device */
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int virq; /* KVM irqchip route for QEMU bypass */
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bool use;
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} VFIOMSIVector;
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enum {
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VFIO_INT_NONE = 0,
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VFIO_INT_INTx = 1,
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VFIO_INT_MSI = 2,
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VFIO_INT_MSIX = 3,
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};
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struct VFIOGroup;
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typedef struct VFIOContainer {
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int fd; /* /dev/vfio/vfio, empowered by the attached groups */
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struct {
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/* enable abstraction to support various iommu backends */
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union {
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MemoryListener listener; /* Used by type1 iommu */
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};
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void (*release)(struct VFIOContainer *);
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} iommu_data;
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QLIST_HEAD(, VFIOGroup) group_list;
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QLIST_ENTRY(VFIOContainer) next;
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} VFIOContainer;
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/* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
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typedef struct VFIOMSIXInfo {
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uint8_t table_bar;
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uint8_t pba_bar;
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uint16_t entries;
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uint32_t table_offset;
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uint32_t pba_offset;
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MemoryRegion mmap_mem;
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void *mmap;
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} VFIOMSIXInfo;
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typedef struct VFIODevice {
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PCIDevice pdev;
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int fd;
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VFIOINTx intx;
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unsigned int config_size;
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off_t config_offset; /* Offset of config space region within device fd */
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unsigned int rom_size;
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off_t rom_offset; /* Offset of ROM region within device fd */
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int msi_cap_size;
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VFIOMSIVector *msi_vectors;
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VFIOMSIXInfo *msix;
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int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
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int interrupt; /* Current interrupt type */
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VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
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PCIHostDeviceAddress host;
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QLIST_ENTRY(VFIODevice) next;
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struct VFIOGroup *group;
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bool reset_works;
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} VFIODevice;
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typedef struct VFIOGroup {
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int fd;
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int groupid;
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VFIOContainer *container;
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QLIST_HEAD(, VFIODevice) device_list;
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QLIST_ENTRY(VFIOGroup) next;
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QLIST_ENTRY(VFIOGroup) container_next;
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} VFIOGroup;
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#define MSIX_CAP_LENGTH 12
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static QLIST_HEAD(, VFIOContainer)
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container_list = QLIST_HEAD_INITIALIZER(container_list);
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static QLIST_HEAD(, VFIOGroup)
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group_list = QLIST_HEAD_INITIALIZER(group_list);
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static void vfio_disable_interrupts(VFIODevice *vdev);
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static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
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static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled);
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/*
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* Common VFIO interrupt disable
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*/
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static void vfio_disable_irqindex(VFIODevice *vdev, int index)
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{
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struct vfio_irq_set irq_set = {
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.argsz = sizeof(irq_set),
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.flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
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.index = index,
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.start = 0,
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.count = 0,
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};
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ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
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}
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/*
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* INTx
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*/
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static void vfio_unmask_intx(VFIODevice *vdev)
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{
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struct vfio_irq_set irq_set = {
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.argsz = sizeof(irq_set),
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.flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
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.index = VFIO_PCI_INTX_IRQ_INDEX,
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.start = 0,
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.count = 1,
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};
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ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
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}
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/*
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* Disabling BAR mmaping can be slow, but toggling it around INTx can
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* also be a huge overhead. We try to get the best of both worlds by
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* waiting until an interrupt to disable mmaps (subsequent transitions
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* to the same state are effectively no overhead). If the interrupt has
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* been serviced and the time gap is long enough, we re-enable mmaps for
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* performance. This works well for things like graphics cards, which
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* may not use their interrupt at all and are penalized to an unusable
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* level by read/write BAR traps. Other devices, like NICs, have more
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* regular interrupts and see much better latency by staying in non-mmap
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* mode. We therefore set the default mmap_timeout such that a ping
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* is just enough to keep the mmap disabled. Users can experiment with
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* other options with the x-intx-mmap-timeout-ms parameter (a value of
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* zero disables the timer).
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*/
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static void vfio_intx_mmap_enable(void *opaque)
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{
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VFIODevice *vdev = opaque;
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if (vdev->intx.pending) {
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qemu_mod_timer(vdev->intx.mmap_timer,
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qemu_get_clock_ms(vm_clock) + vdev->intx.mmap_timeout);
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return;
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}
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vfio_mmap_set_enabled(vdev, true);
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}
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static void vfio_intx_interrupt(void *opaque)
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{
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VFIODevice *vdev = opaque;
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if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
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return;
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}
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DPRINTF("%s(%04x:%02x:%02x.%x) Pin %c\n", __func__, vdev->host.domain,
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vdev->host.bus, vdev->host.slot, vdev->host.function,
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'A' + vdev->intx.pin);
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vdev->intx.pending = true;
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qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 1);
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vfio_mmap_set_enabled(vdev, false);
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if (vdev->intx.mmap_timeout) {
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qemu_mod_timer(vdev->intx.mmap_timer,
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qemu_get_clock_ms(vm_clock) + vdev->intx.mmap_timeout);
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}
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}
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static void vfio_eoi(VFIODevice *vdev)
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{
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if (!vdev->intx.pending) {
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return;
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}
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DPRINTF("%s(%04x:%02x:%02x.%x) EOI\n", __func__, vdev->host.domain,
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vdev->host.bus, vdev->host.slot, vdev->host.function);
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vdev->intx.pending = false;
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qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
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vfio_unmask_intx(vdev);
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}
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typedef struct QEMU_PACKED VFIOIRQSetFD {
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struct vfio_irq_set irq_set;
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int32_t fd;
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} VFIOIRQSetFD;
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static int vfio_enable_intx(VFIODevice *vdev)
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{
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VFIOIRQSetFD irq_set_fd = {
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.irq_set = {
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.argsz = sizeof(irq_set_fd),
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.flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER,
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.index = VFIO_PCI_INTX_IRQ_INDEX,
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.start = 0,
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.count = 1,
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},
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};
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uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
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int ret;
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if (!pin) {
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return 0;
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}
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vfio_disable_interrupts(vdev);
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vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */
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ret = event_notifier_init(&vdev->intx.interrupt, 0);
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if (ret) {
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error_report("vfio: Error: event_notifier_init failed\n");
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return ret;
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}
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irq_set_fd.fd = event_notifier_get_fd(&vdev->intx.interrupt);
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qemu_set_fd_handler(irq_set_fd.fd, vfio_intx_interrupt, NULL, vdev);
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if (ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set_fd)) {
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error_report("vfio: Error: Failed to setup INTx fd: %m\n");
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return -errno;
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}
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vdev->interrupt = VFIO_INT_INTx;
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DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
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vdev->host.bus, vdev->host.slot, vdev->host.function);
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return 0;
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}
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static void vfio_disable_intx(VFIODevice *vdev)
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{
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int fd;
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qemu_del_timer(vdev->intx.mmap_timer);
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vfio_disable_irqindex(vdev, VFIO_PCI_INTX_IRQ_INDEX);
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vdev->intx.pending = false;
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qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
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vfio_mmap_set_enabled(vdev, true);
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fd = event_notifier_get_fd(&vdev->intx.interrupt);
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qemu_set_fd_handler(fd, NULL, NULL, vdev);
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event_notifier_cleanup(&vdev->intx.interrupt);
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vdev->interrupt = VFIO_INT_NONE;
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DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
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vdev->host.bus, vdev->host.slot, vdev->host.function);
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}
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/*
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* MSI/X
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*/
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static void vfio_msi_interrupt(void *opaque)
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{
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VFIOMSIVector *vector = opaque;
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VFIODevice *vdev = vector->vdev;
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int nr = vector - vdev->msi_vectors;
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if (!event_notifier_test_and_clear(&vector->interrupt)) {
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return;
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}
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DPRINTF("%s(%04x:%02x:%02x.%x) vector %d\n", __func__,
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vdev->host.domain, vdev->host.bus, vdev->host.slot,
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vdev->host.function, nr);
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if (vdev->interrupt == VFIO_INT_MSIX) {
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msix_notify(&vdev->pdev, nr);
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} else if (vdev->interrupt == VFIO_INT_MSI) {
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msi_notify(&vdev->pdev, nr);
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} else {
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error_report("vfio: MSI interrupt receieved, but not enabled?\n");
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}
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}
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static int vfio_enable_vectors(VFIODevice *vdev, bool msix)
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{
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struct vfio_irq_set *irq_set;
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int ret = 0, i, argsz;
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int32_t *fds;
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argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds));
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irq_set = g_malloc0(argsz);
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irq_set->argsz = argsz;
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irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
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irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX;
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irq_set->start = 0;
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irq_set->count = vdev->nr_vectors;
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fds = (int32_t *)&irq_set->data;
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for (i = 0; i < vdev->nr_vectors; i++) {
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if (!vdev->msi_vectors[i].use) {
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fds[i] = -1;
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continue;
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}
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fds[i] = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt);
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}
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ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
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g_free(irq_set);
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return ret;
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}
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static int vfio_msix_vector_use(PCIDevice *pdev,
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unsigned int nr, MSIMessage msg)
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{
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VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
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VFIOMSIVector *vector;
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int ret;
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DPRINTF("%s(%04x:%02x:%02x.%x) vector %d used\n", __func__,
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vdev->host.domain, vdev->host.bus, vdev->host.slot,
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vdev->host.function, nr);
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vector = &vdev->msi_vectors[nr];
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vector->vdev = vdev;
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vector->use = true;
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msix_vector_use(pdev, nr);
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if (event_notifier_init(&vector->interrupt, 0)) {
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error_report("vfio: Error: event_notifier_init failed\n");
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}
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/*
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* Attempt to enable route through KVM irqchip,
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* default to userspace handling if unavailable.
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*/
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vector->virq = kvm_irqchip_add_msi_route(kvm_state, msg);
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if (vector->virq < 0 ||
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kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt,
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vector->virq) < 0) {
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if (vector->virq >= 0) {
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kvm_irqchip_release_virq(kvm_state, vector->virq);
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vector->virq = -1;
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}
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qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
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vfio_msi_interrupt, NULL, vector);
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}
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/*
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* We don't want to have the host allocate all possible MSI vectors
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* for a device if they're not in use, so we shutdown and incrementally
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* increase them as needed.
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*/
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if (vdev->nr_vectors < nr + 1) {
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vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX);
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vdev->nr_vectors = nr + 1;
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ret = vfio_enable_vectors(vdev, true);
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if (ret) {
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error_report("vfio: failed to enable vectors, %d\n", ret);
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}
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} else {
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VFIOIRQSetFD irq_set_fd = {
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.irq_set = {
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.argsz = sizeof(irq_set_fd),
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.flags = VFIO_IRQ_SET_DATA_EVENTFD |
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VFIO_IRQ_SET_ACTION_TRIGGER,
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.index = VFIO_PCI_MSIX_IRQ_INDEX,
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.start = nr,
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.count = 1,
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},
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.fd = event_notifier_get_fd(&vector->interrupt),
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};
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ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set_fd);
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if (ret) {
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error_report("vfio: failed to modify vector, %d\n", ret);
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}
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}
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return 0;
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}
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static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
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{
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VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
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VFIOMSIVector *vector = &vdev->msi_vectors[nr];
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VFIOIRQSetFD irq_set_fd = {
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.irq_set = {
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.argsz = sizeof(irq_set_fd),
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.flags = VFIO_IRQ_SET_DATA_EVENTFD |
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VFIO_IRQ_SET_ACTION_TRIGGER,
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.index = VFIO_PCI_MSIX_IRQ_INDEX,
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.start = nr,
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.count = 1,
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},
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.fd = -1,
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};
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DPRINTF("%s(%04x:%02x:%02x.%x) vector %d released\n", __func__,
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vdev->host.domain, vdev->host.bus, vdev->host.slot,
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vdev->host.function, nr);
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/*
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* XXX What's the right thing to do here? This turns off the interrupt
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* completely, but do we really just want to switch the interrupt to
|
|
* bouncing through userspace and let msix.c drop it? Not sure.
|
|
*/
|
|
msix_vector_unuse(pdev, nr);
|
|
ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set_fd);
|
|
|
|
if (vector->virq < 0) {
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
NULL, NULL, NULL);
|
|
} else {
|
|
kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt,
|
|
vector->virq);
|
|
kvm_irqchip_release_virq(kvm_state, vector->virq);
|
|
vector->virq = -1;
|
|
}
|
|
|
|
event_notifier_cleanup(&vector->interrupt);
|
|
vector->use = false;
|
|
}
|
|
|
|
/* TODO This should move to msi.c */
|
|
static MSIMessage msi_get_msg(PCIDevice *pdev, unsigned int vector)
|
|
{
|
|
uint16_t flags = pci_get_word(pdev->config + pdev->msi_cap + PCI_MSI_FLAGS);
|
|
bool msi64bit = flags & PCI_MSI_FLAGS_64BIT;
|
|
MSIMessage msg;
|
|
|
|
if (msi64bit) {
|
|
msg.address = pci_get_quad(pdev->config +
|
|
pdev->msi_cap + PCI_MSI_ADDRESS_LO);
|
|
} else {
|
|
msg.address = pci_get_long(pdev->config +
|
|
pdev->msi_cap + PCI_MSI_ADDRESS_LO);
|
|
}
|
|
|
|
msg.data = pci_get_word(pdev->config + pdev->msi_cap +
|
|
(msi64bit ? PCI_MSI_DATA_64 : PCI_MSI_DATA_32));
|
|
msg.data += vector;
|
|
|
|
return msg;
|
|
}
|
|
|
|
/* So should this */
|
|
static void msi_set_qsize(PCIDevice *pdev, uint8_t size)
|
|
{
|
|
uint8_t *config = pdev->config + pdev->msi_cap;
|
|
uint16_t flags;
|
|
|
|
flags = pci_get_word(config + PCI_MSI_FLAGS);
|
|
flags = le16_to_cpu(flags);
|
|
flags &= ~PCI_MSI_FLAGS_QSIZE;
|
|
flags |= (size & 0x7) << 4;
|
|
flags = cpu_to_le16(flags);
|
|
pci_set_word(config + PCI_MSI_FLAGS, flags);
|
|
}
|
|
|
|
static void vfio_enable_msix(VFIODevice *vdev)
|
|
{
|
|
vfio_disable_interrupts(vdev);
|
|
|
|
vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
|
|
|
|
vdev->interrupt = VFIO_INT_MSIX;
|
|
|
|
if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
|
|
vfio_msix_vector_release)) {
|
|
error_report("vfio: msix_set_vector_notifiers failed\n");
|
|
}
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function);
|
|
}
|
|
|
|
static void vfio_enable_msi(VFIODevice *vdev)
|
|
{
|
|
int ret, i;
|
|
|
|
vfio_disable_interrupts(vdev);
|
|
|
|
vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
|
|
retry:
|
|
vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
MSIMessage msg;
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
|
|
vector->vdev = vdev;
|
|
vector->use = true;
|
|
|
|
if (event_notifier_init(&vector->interrupt, 0)) {
|
|
error_report("vfio: Error: event_notifier_init failed\n");
|
|
}
|
|
|
|
msg = msi_get_msg(&vdev->pdev, i);
|
|
|
|
/*
|
|
* Attempt to enable route through KVM irqchip,
|
|
* default to userspace handling if unavailable.
|
|
*/
|
|
vector->virq = kvm_irqchip_add_msi_route(kvm_state, msg);
|
|
if (vector->virq < 0 ||
|
|
kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt,
|
|
vector->virq) < 0) {
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
vfio_msi_interrupt, NULL, vector);
|
|
}
|
|
}
|
|
|
|
ret = vfio_enable_vectors(vdev, false);
|
|
if (ret) {
|
|
if (ret < 0) {
|
|
error_report("vfio: Error: Failed to setup MSI fds: %m\n");
|
|
} else if (ret != vdev->nr_vectors) {
|
|
error_report("vfio: Error: Failed to enable %d "
|
|
"MSI vectors, retry with %d\n", vdev->nr_vectors, ret);
|
|
}
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
if (vector->virq >= 0) {
|
|
kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt,
|
|
vector->virq);
|
|
kvm_irqchip_release_virq(kvm_state, vector->virq);
|
|
vector->virq = -1;
|
|
} else {
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
NULL, NULL, NULL);
|
|
}
|
|
event_notifier_cleanup(&vector->interrupt);
|
|
}
|
|
|
|
g_free(vdev->msi_vectors);
|
|
|
|
if (ret > 0 && ret != vdev->nr_vectors) {
|
|
vdev->nr_vectors = ret;
|
|
goto retry;
|
|
}
|
|
vdev->nr_vectors = 0;
|
|
|
|
return;
|
|
}
|
|
|
|
msi_set_qsize(&vdev->pdev, vdev->nr_vectors);
|
|
|
|
vdev->interrupt = VFIO_INT_MSI;
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x) Enabled %d MSI vectors\n", __func__,
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, vdev->nr_vectors);
|
|
}
|
|
|
|
static void vfio_disable_msi_common(VFIODevice *vdev)
|
|
{
|
|
g_free(vdev->msi_vectors);
|
|
vdev->msi_vectors = NULL;
|
|
vdev->nr_vectors = 0;
|
|
vdev->interrupt = VFIO_INT_NONE;
|
|
|
|
vfio_enable_intx(vdev);
|
|
}
|
|
|
|
static void vfio_disable_msix(VFIODevice *vdev)
|
|
{
|
|
msix_unset_vector_notifiers(&vdev->pdev);
|
|
|
|
if (vdev->nr_vectors) {
|
|
vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX);
|
|
}
|
|
|
|
vfio_disable_msi_common(vdev);
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x, msi%s)\n", __func__,
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, msix ? "x" : "");
|
|
}
|
|
|
|
static void vfio_disable_msi(VFIODevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
vfio_disable_irqindex(vdev, VFIO_PCI_MSI_IRQ_INDEX);
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
|
|
if (!vector->use) {
|
|
continue;
|
|
}
|
|
|
|
if (vector->virq >= 0) {
|
|
kvm_irqchip_remove_irqfd_notifier(kvm_state,
|
|
&vector->interrupt, vector->virq);
|
|
kvm_irqchip_release_virq(kvm_state, vector->virq);
|
|
vector->virq = -1;
|
|
} else {
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
NULL, NULL, NULL);
|
|
}
|
|
|
|
event_notifier_cleanup(&vector->interrupt);
|
|
}
|
|
|
|
vfio_disable_msi_common(vdev);
|
|
|
|
msi_set_qsize(&vdev->pdev, 0); /* Actually still means 1 vector */
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function);
|
|
}
|
|
|
|
/*
|
|
* IO Port/MMIO - Beware of the endians, VFIO is always little endian
|
|
*/
|
|
static void vfio_bar_write(void *opaque, target_phys_addr_t addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOBAR *bar = opaque;
|
|
union {
|
|
uint8_t byte;
|
|
uint16_t word;
|
|
uint32_t dword;
|
|
uint64_t qword;
|
|
} buf;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
buf.byte = data;
|
|
break;
|
|
case 2:
|
|
buf.word = cpu_to_le16(data);
|
|
break;
|
|
case 4:
|
|
buf.dword = cpu_to_le32(data);
|
|
break;
|
|
default:
|
|
hw_error("vfio: unsupported write size, %d bytes\n", size);
|
|
break;
|
|
}
|
|
|
|
if (pwrite(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
|
|
error_report("%s(,0x%"TARGET_PRIxPHYS", 0x%"PRIx64", %d) failed: %m\n",
|
|
__func__, addr, data, size);
|
|
}
|
|
|
|
DPRINTF("%s(BAR%d+0x%"TARGET_PRIxPHYS", 0x%"PRIx64", %d)\n",
|
|
__func__, bar->nr, addr, data, size);
|
|
|
|
/*
|
|
* A read or write to a BAR always signals an INTx EOI. This will
|
|
* do nothing if not pending (including not in INTx mode). We assume
|
|
* that a BAR access is in response to an interrupt and that BAR
|
|
* accesses will service the interrupt. Unfortunately, we don't know
|
|
* which access will service the interrupt, so we're potentially
|
|
* getting quite a few host interrupts per guest interrupt.
|
|
*/
|
|
vfio_eoi(DO_UPCAST(VFIODevice, bars[bar->nr], bar));
|
|
}
|
|
|
|
static uint64_t vfio_bar_read(void *opaque,
|
|
target_phys_addr_t addr, unsigned size)
|
|
{
|
|
VFIOBAR *bar = opaque;
|
|
union {
|
|
uint8_t byte;
|
|
uint16_t word;
|
|
uint32_t dword;
|
|
uint64_t qword;
|
|
} buf;
|
|
uint64_t data = 0;
|
|
|
|
if (pread(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
|
|
error_report("%s(,0x%"TARGET_PRIxPHYS", %d) failed: %m\n",
|
|
__func__, addr, size);
|
|
return (uint64_t)-1;
|
|
}
|
|
|
|
switch (size) {
|
|
case 1:
|
|
data = buf.byte;
|
|
break;
|
|
case 2:
|
|
data = le16_to_cpu(buf.word);
|
|
break;
|
|
case 4:
|
|
data = le32_to_cpu(buf.dword);
|
|
break;
|
|
default:
|
|
hw_error("vfio: unsupported read size, %d bytes\n", size);
|
|
break;
|
|
}
|
|
|
|
DPRINTF("%s(BAR%d+0x%"TARGET_PRIxPHYS", %d) = 0x%"PRIx64"\n",
|
|
__func__, bar->nr, addr, size, data);
|
|
|
|
/* Same as write above */
|
|
vfio_eoi(DO_UPCAST(VFIODevice, bars[bar->nr], bar));
|
|
|
|
return data;
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_bar_ops = {
|
|
.read = vfio_bar_read,
|
|
.write = vfio_bar_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
/*
|
|
* PCI config space
|
|
*/
|
|
static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
|
|
{
|
|
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
|
|
uint32_t val = 0;
|
|
|
|
/*
|
|
* We only need QEMU PCI config support for the ROM BAR, the MSI and MSIX
|
|
* capabilities, and the multifunction bit below. We let VFIO handle
|
|
* virtualizing everything else. Performance is not a concern here.
|
|
*/
|
|
if (ranges_overlap(addr, len, PCI_ROM_ADDRESS, 4) ||
|
|
(pdev->cap_present & QEMU_PCI_CAP_MSIX &&
|
|
ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) ||
|
|
(pdev->cap_present & QEMU_PCI_CAP_MSI &&
|
|
ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size))) {
|
|
|
|
val = pci_default_read_config(pdev, addr, len);
|
|
} else {
|
|
if (pread(vdev->fd, &val, len, vdev->config_offset + addr) != len) {
|
|
error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x) failed: %m\n",
|
|
__func__, vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function, addr, len);
|
|
return -errno;
|
|
}
|
|
val = le32_to_cpu(val);
|
|
}
|
|
|
|
/* Multifunction bit is virualized in QEMU */
|
|
if (unlikely(ranges_overlap(addr, len, PCI_HEADER_TYPE, 1))) {
|
|
uint32_t mask = PCI_HEADER_TYPE_MULTI_FUNCTION;
|
|
|
|
if (len == 4) {
|
|
mask <<= 16;
|
|
}
|
|
|
|
if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
|
|
val |= mask;
|
|
} else {
|
|
val &= ~mask;
|
|
}
|
|
}
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, len=0x%x) %x\n", __func__,
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, addr, len, val);
|
|
|
|
return val;
|
|
}
|
|
|
|
static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
|
|
uint32_t val, int len)
|
|
{
|
|
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
|
|
uint32_t val_le = cpu_to_le32(val);
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, 0x%x, len=0x%x)\n", __func__,
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, addr, val, len);
|
|
|
|
/* Write everything to VFIO, let it filter out what we can't write */
|
|
if (pwrite(vdev->fd, &val_le, len, vdev->config_offset + addr) != len) {
|
|
error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x, 0x%x) failed: %m\n",
|
|
__func__, vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function, addr, val, len);
|
|
}
|
|
|
|
/* Write standard header bits to emulation */
|
|
if (addr < PCI_CONFIG_HEADER_SIZE) {
|
|
pci_default_write_config(pdev, addr, val, len);
|
|
return;
|
|
}
|
|
|
|
/* MSI/MSI-X Enabling/Disabling */
|
|
if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
|
|
ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
|
|
int is_enabled, was_enabled = msi_enabled(pdev);
|
|
|
|
pci_default_write_config(pdev, addr, val, len);
|
|
|
|
is_enabled = msi_enabled(pdev);
|
|
|
|
if (!was_enabled && is_enabled) {
|
|
vfio_enable_msi(vdev);
|
|
} else if (was_enabled && !is_enabled) {
|
|
vfio_disable_msi(vdev);
|
|
}
|
|
}
|
|
|
|
if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
|
|
ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
|
|
int is_enabled, was_enabled = msix_enabled(pdev);
|
|
|
|
pci_default_write_config(pdev, addr, val, len);
|
|
|
|
is_enabled = msix_enabled(pdev);
|
|
|
|
if (!was_enabled && is_enabled) {
|
|
vfio_enable_msix(vdev);
|
|
} else if (was_enabled && !is_enabled) {
|
|
vfio_disable_msix(vdev);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
|
|
*/
|
|
static int vfio_dma_unmap(VFIOContainer *container,
|
|
target_phys_addr_t iova, ram_addr_t size)
|
|
{
|
|
struct vfio_iommu_type1_dma_unmap unmap = {
|
|
.argsz = sizeof(unmap),
|
|
.flags = 0,
|
|
.iova = iova,
|
|
.size = size,
|
|
};
|
|
|
|
if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
|
|
DPRINTF("VFIO_UNMAP_DMA: %d\n", -errno);
|
|
return -errno;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_dma_map(VFIOContainer *container, target_phys_addr_t iova,
|
|
ram_addr_t size, void *vaddr, bool readonly)
|
|
{
|
|
struct vfio_iommu_type1_dma_map map = {
|
|
.argsz = sizeof(map),
|
|
.flags = VFIO_DMA_MAP_FLAG_READ,
|
|
.vaddr = (__u64)(uintptr_t)vaddr,
|
|
.iova = iova,
|
|
.size = size,
|
|
};
|
|
|
|
if (!readonly) {
|
|
map.flags |= VFIO_DMA_MAP_FLAG_WRITE;
|
|
}
|
|
|
|
/*
|
|
* Try the mapping, if it fails with EBUSY, unmap the region and try
|
|
* again. This shouldn't be necessary, but we sometimes see it in
|
|
* the the VGA ROM space.
|
|
*/
|
|
if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 ||
|
|
(errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
|
|
ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
|
|
return 0;
|
|
}
|
|
|
|
DPRINTF("VFIO_MAP_DMA: %d\n", -errno);
|
|
return -errno;
|
|
}
|
|
|
|
static void vfio_listener_dummy1(MemoryListener *listener)
|
|
{
|
|
/* We don't do batching (begin/commit) or care about logging */
|
|
}
|
|
|
|
static void vfio_listener_dummy2(MemoryListener *listener,
|
|
MemoryRegionSection *section)
|
|
{
|
|
/* We don't do logging or care about nops */
|
|
}
|
|
|
|
static void vfio_listener_dummy3(MemoryListener *listener,
|
|
MemoryRegionSection *section,
|
|
bool match_data, uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
/* We don't care about eventfds */
|
|
}
|
|
|
|
static bool vfio_listener_skipped_section(MemoryRegionSection *section)
|
|
{
|
|
return !memory_region_is_ram(section->mr);
|
|
}
|
|
|
|
static void vfio_listener_region_add(MemoryListener *listener,
|
|
MemoryRegionSection *section)
|
|
{
|
|
VFIOContainer *container = container_of(listener, VFIOContainer,
|
|
iommu_data.listener);
|
|
target_phys_addr_t iova, end;
|
|
void *vaddr;
|
|
int ret;
|
|
|
|
if (vfio_listener_skipped_section(section)) {
|
|
DPRINTF("vfio: SKIPPING region_add %"TARGET_PRIxPHYS" - %"PRIx64"\n",
|
|
section->offset_within_address_space,
|
|
section->offset_within_address_space + section->size - 1);
|
|
return;
|
|
}
|
|
|
|
if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
|
|
(section->offset_within_region & ~TARGET_PAGE_MASK))) {
|
|
error_report("%s received unaligned region\n", __func__);
|
|
return;
|
|
}
|
|
|
|
iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
|
|
end = (section->offset_within_address_space + section->size) &
|
|
TARGET_PAGE_MASK;
|
|
|
|
if (iova >= end) {
|
|
return;
|
|
}
|
|
|
|
vaddr = memory_region_get_ram_ptr(section->mr) +
|
|
section->offset_within_region +
|
|
(iova - section->offset_within_address_space);
|
|
|
|
DPRINTF("vfio: region_add %"TARGET_PRIxPHYS" - %"TARGET_PRIxPHYS" [%p]\n",
|
|
iova, end - 1, vaddr);
|
|
|
|
ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly);
|
|
if (ret) {
|
|
error_report("vfio_dma_map(%p, 0x%"TARGET_PRIxPHYS", "
|
|
"0x%"TARGET_PRIxPHYS", %p) = %d (%m)\n",
|
|
container, iova, end - iova, vaddr, ret);
|
|
}
|
|
}
|
|
|
|
static void vfio_listener_region_del(MemoryListener *listener,
|
|
MemoryRegionSection *section)
|
|
{
|
|
VFIOContainer *container = container_of(listener, VFIOContainer,
|
|
iommu_data.listener);
|
|
target_phys_addr_t iova, end;
|
|
int ret;
|
|
|
|
if (vfio_listener_skipped_section(section)) {
|
|
DPRINTF("vfio: SKIPPING region_del %"TARGET_PRIxPHYS" - %"PRIx64"\n",
|
|
section->offset_within_address_space,
|
|
section->offset_within_address_space + section->size - 1);
|
|
return;
|
|
}
|
|
|
|
if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
|
|
(section->offset_within_region & ~TARGET_PAGE_MASK))) {
|
|
error_report("%s received unaligned region\n", __func__);
|
|
return;
|
|
}
|
|
|
|
iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
|
|
end = (section->offset_within_address_space + section->size) &
|
|
TARGET_PAGE_MASK;
|
|
|
|
if (iova >= end) {
|
|
return;
|
|
}
|
|
|
|
DPRINTF("vfio: region_del %"TARGET_PRIxPHYS" - %"TARGET_PRIxPHYS"\n",
|
|
iova, end - 1);
|
|
|
|
ret = vfio_dma_unmap(container, iova, end - iova);
|
|
if (ret) {
|
|
error_report("vfio_dma_unmap(%p, 0x%"TARGET_PRIxPHYS", "
|
|
"0x%"TARGET_PRIxPHYS") = %d (%m)\n",
|
|
container, iova, end - iova, ret);
|
|
}
|
|
}
|
|
|
|
static MemoryListener vfio_memory_listener = {
|
|
.begin = vfio_listener_dummy1,
|
|
.commit = vfio_listener_dummy1,
|
|
.region_add = vfio_listener_region_add,
|
|
.region_del = vfio_listener_region_del,
|
|
.region_nop = vfio_listener_dummy2,
|
|
.log_start = vfio_listener_dummy2,
|
|
.log_stop = vfio_listener_dummy2,
|
|
.log_sync = vfio_listener_dummy2,
|
|
.log_global_start = vfio_listener_dummy1,
|
|
.log_global_stop = vfio_listener_dummy1,
|
|
.eventfd_add = vfio_listener_dummy3,
|
|
.eventfd_del = vfio_listener_dummy3,
|
|
};
|
|
|
|
static void vfio_listener_release(VFIOContainer *container)
|
|
{
|
|
memory_listener_unregister(&container->iommu_data.listener);
|
|
}
|
|
|
|
/*
|
|
* Interrupt setup
|
|
*/
|
|
static void vfio_disable_interrupts(VFIODevice *vdev)
|
|
{
|
|
switch (vdev->interrupt) {
|
|
case VFIO_INT_INTx:
|
|
vfio_disable_intx(vdev);
|
|
break;
|
|
case VFIO_INT_MSI:
|
|
vfio_disable_msi(vdev);
|
|
break;
|
|
case VFIO_INT_MSIX:
|
|
vfio_disable_msix(vdev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int vfio_setup_msi(VFIODevice *vdev, int pos)
|
|
{
|
|
uint16_t ctrl;
|
|
bool msi_64bit, msi_maskbit;
|
|
int ret, entries;
|
|
|
|
if (pread(vdev->fd, &ctrl, sizeof(ctrl),
|
|
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
|
return -errno;
|
|
}
|
|
ctrl = le16_to_cpu(ctrl);
|
|
|
|
msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT);
|
|
msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT);
|
|
entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1);
|
|
|
|
DPRINTF("%04x:%02x:%02x.%x PCI MSI CAP @0x%x\n", vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function, pos);
|
|
|
|
ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP) {
|
|
return 0;
|
|
}
|
|
error_report("vfio: msi_init failed\n");
|
|
return ret;
|
|
}
|
|
vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We don't have any control over how pci_add_capability() inserts
|
|
* capabilities into the chain. In order to setup MSI-X we need a
|
|
* MemoryRegion for the BAR. In order to setup the BAR and not
|
|
* attempt to mmap the MSI-X table area, which VFIO won't allow, we
|
|
* need to first look for where the MSI-X table lives. So we
|
|
* unfortunately split MSI-X setup across two functions.
|
|
*/
|
|
static int vfio_early_setup_msix(VFIODevice *vdev)
|
|
{
|
|
uint8_t pos;
|
|
uint16_t ctrl;
|
|
uint32_t table, pba;
|
|
|
|
pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
|
|
if (!pos) {
|
|
return 0;
|
|
}
|
|
|
|
if (pread(vdev->fd, &ctrl, sizeof(ctrl),
|
|
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
|
return -errno;
|
|
}
|
|
|
|
if (pread(vdev->fd, &table, sizeof(table),
|
|
vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
|
|
return -errno;
|
|
}
|
|
|
|
if (pread(vdev->fd, &pba, sizeof(pba),
|
|
vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
|
|
return -errno;
|
|
}
|
|
|
|
ctrl = le16_to_cpu(ctrl);
|
|
table = le32_to_cpu(table);
|
|
pba = le32_to_cpu(pba);
|
|
|
|
vdev->msix = g_malloc0(sizeof(*(vdev->msix)));
|
|
vdev->msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
|
|
|
|
DPRINTF("%04x:%02x:%02x.%x "
|
|
"PCI MSI-X CAP @0x%x, BAR %d, offset 0x%x, entries %d\n",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, pos, vdev->msix->table_bar,
|
|
vdev->msix->table_offset, vdev->msix->entries);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_setup_msix(VFIODevice *vdev, int pos)
|
|
{
|
|
int ret;
|
|
|
|
ret = msix_init(&vdev->pdev, vdev->msix->entries,
|
|
&vdev->bars[vdev->msix->table_bar].mem,
|
|
vdev->msix->table_bar, vdev->msix->table_offset,
|
|
&vdev->bars[vdev->msix->pba_bar].mem,
|
|
vdev->msix->pba_bar, vdev->msix->pba_offset, pos);
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP) {
|
|
return 0;
|
|
}
|
|
error_report("vfio: msix_init failed\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_teardown_msi(VFIODevice *vdev)
|
|
{
|
|
msi_uninit(&vdev->pdev);
|
|
|
|
if (vdev->msix) {
|
|
msix_uninit(&vdev->pdev, &vdev->bars[vdev->msix->table_bar].mem,
|
|
&vdev->bars[vdev->msix->pba_bar].mem);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Resource setup
|
|
*/
|
|
static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
VFIOBAR *bar = &vdev->bars[i];
|
|
|
|
if (!bar->size) {
|
|
continue;
|
|
}
|
|
|
|
memory_region_set_enabled(&bar->mmap_mem, enabled);
|
|
if (vdev->msix && vdev->msix->table_bar == i) {
|
|
memory_region_set_enabled(&vdev->msix->mmap_mem, enabled);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vfio_unmap_bar(VFIODevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
|
|
if (!bar->size) {
|
|
return;
|
|
}
|
|
|
|
memory_region_del_subregion(&bar->mem, &bar->mmap_mem);
|
|
munmap(bar->mmap, memory_region_size(&bar->mmap_mem));
|
|
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
memory_region_del_subregion(&bar->mem, &vdev->msix->mmap_mem);
|
|
munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem));
|
|
}
|
|
|
|
memory_region_destroy(&bar->mem);
|
|
}
|
|
|
|
static int vfio_mmap_bar(VFIOBAR *bar, MemoryRegion *mem, MemoryRegion *submem,
|
|
void **map, size_t size, off_t offset,
|
|
const char *name)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (size && bar->flags & VFIO_REGION_INFO_FLAG_MMAP) {
|
|
int prot = 0;
|
|
|
|
if (bar->flags & VFIO_REGION_INFO_FLAG_READ) {
|
|
prot |= PROT_READ;
|
|
}
|
|
|
|
if (bar->flags & VFIO_REGION_INFO_FLAG_WRITE) {
|
|
prot |= PROT_WRITE;
|
|
}
|
|
|
|
*map = mmap(NULL, size, prot, MAP_SHARED,
|
|
bar->fd, bar->fd_offset + offset);
|
|
if (*map == MAP_FAILED) {
|
|
*map = NULL;
|
|
ret = -errno;
|
|
goto empty_region;
|
|
}
|
|
|
|
memory_region_init_ram_ptr(submem, name, size, *map);
|
|
} else {
|
|
empty_region:
|
|
/* Create a zero sized sub-region to make cleanup easy. */
|
|
memory_region_init(submem, name, 0);
|
|
}
|
|
|
|
memory_region_add_subregion(mem, offset, submem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_map_bar(VFIODevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
unsigned size = bar->size;
|
|
char name[64];
|
|
uint32_t pci_bar;
|
|
uint8_t type;
|
|
int ret;
|
|
|
|
/* Skip both unimplemented BARs and the upper half of 64bit BARS. */
|
|
if (!size) {
|
|
return;
|
|
}
|
|
|
|
snprintf(name, sizeof(name), "VFIO %04x:%02x:%02x.%x BAR %d",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, nr);
|
|
|
|
/* Determine what type of BAR this is for registration */
|
|
ret = pread(vdev->fd, &pci_bar, sizeof(pci_bar),
|
|
vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
|
|
if (ret != sizeof(pci_bar)) {
|
|
error_report("vfio: Failed to read BAR %d (%m)\n", nr);
|
|
return;
|
|
}
|
|
|
|
pci_bar = le32_to_cpu(pci_bar);
|
|
type = pci_bar & (pci_bar & PCI_BASE_ADDRESS_SPACE_IO ?
|
|
~PCI_BASE_ADDRESS_IO_MASK : ~PCI_BASE_ADDRESS_MEM_MASK);
|
|
|
|
/* A "slow" read/write mapping underlies all BARs */
|
|
memory_region_init_io(&bar->mem, &vfio_bar_ops, bar, name, size);
|
|
pci_register_bar(&vdev->pdev, nr, type, &bar->mem);
|
|
|
|
/*
|
|
* We can't mmap areas overlapping the MSIX vector table, so we
|
|
* potentially insert a direct-mapped subregion before and after it.
|
|
*/
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
size = vdev->msix->table_offset & TARGET_PAGE_MASK;
|
|
}
|
|
|
|
strncat(name, " mmap", sizeof(name) - strlen(name) - 1);
|
|
if (vfio_mmap_bar(bar, &bar->mem,
|
|
&bar->mmap_mem, &bar->mmap, size, 0, name)) {
|
|
error_report("%s unsupported. Performance may be slow\n", name);
|
|
}
|
|
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
unsigned start;
|
|
|
|
start = TARGET_PAGE_ALIGN(vdev->msix->table_offset +
|
|
(vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
|
|
|
|
size = start < bar->size ? bar->size - start : 0;
|
|
strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1);
|
|
/* VFIOMSIXInfo contains another MemoryRegion for this mapping */
|
|
if (vfio_mmap_bar(bar, &bar->mem, &vdev->msix->mmap_mem,
|
|
&vdev->msix->mmap, size, start, name)) {
|
|
error_report("%s unsupported. Performance may be slow\n", name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vfio_map_bars(VFIODevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
vfio_map_bar(vdev, i);
|
|
}
|
|
}
|
|
|
|
static void vfio_unmap_bars(VFIODevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
vfio_unmap_bar(vdev, i);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* General setup
|
|
*/
|
|
static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
|
|
{
|
|
uint8_t tmp, next = 0xff;
|
|
|
|
for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
|
|
tmp = pdev->config[tmp + 1]) {
|
|
if (tmp > pos && tmp < next) {
|
|
next = tmp;
|
|
}
|
|
}
|
|
|
|
return next - pos;
|
|
}
|
|
|
|
static int vfio_add_std_cap(VFIODevice *vdev, uint8_t pos)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint8_t cap_id, next, size;
|
|
int ret;
|
|
|
|
cap_id = pdev->config[pos];
|
|
next = pdev->config[pos + 1];
|
|
|
|
/*
|
|
* If it becomes important to configure capabilities to their actual
|
|
* size, use this as the default when it's something we don't recognize.
|
|
* Since QEMU doesn't actually handle many of the config accesses,
|
|
* exact size doesn't seem worthwhile.
|
|
*/
|
|
size = vfio_std_cap_max_size(pdev, pos);
|
|
|
|
/*
|
|
* pci_add_capability always inserts the new capability at the head
|
|
* of the chain. Therefore to end up with a chain that matches the
|
|
* physical device, we insert from the end by making this recursive.
|
|
* This is also why we pre-caclulate size above as cached config space
|
|
* will be changed as we unwind the stack.
|
|
*/
|
|
if (next) {
|
|
ret = vfio_add_std_cap(vdev, next);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
} else {
|
|
pdev->config[PCI_CAPABILITY_LIST] = 0; /* Begin the rebuild */
|
|
}
|
|
|
|
switch (cap_id) {
|
|
case PCI_CAP_ID_MSI:
|
|
ret = vfio_setup_msi(vdev, pos);
|
|
break;
|
|
case PCI_CAP_ID_MSIX:
|
|
ret = vfio_setup_msix(vdev, pos);
|
|
break;
|
|
default:
|
|
ret = pci_add_capability(pdev, cap_id, pos, size);
|
|
break;
|
|
}
|
|
|
|
if (ret < 0) {
|
|
error_report("vfio: %04x:%02x:%02x.%x Error adding PCI capability "
|
|
"0x%x[0x%x]@0x%x: %d\n", vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function,
|
|
cap_id, size, pos, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_add_capabilities(VFIODevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
|
|
if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
|
|
!pdev->config[PCI_CAPABILITY_LIST]) {
|
|
return 0; /* Nothing to add */
|
|
}
|
|
|
|
return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
|
|
}
|
|
|
|
static int vfio_load_rom(VFIODevice *vdev)
|
|
{
|
|
uint64_t size = vdev->rom_size;
|
|
char name[32];
|
|
off_t off = 0, voff = vdev->rom_offset;
|
|
ssize_t bytes;
|
|
void *ptr;
|
|
|
|
/* If loading ROM from file, pci handles it */
|
|
if (vdev->pdev.romfile || !vdev->pdev.rom_bar || !size) {
|
|
return 0;
|
|
}
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function);
|
|
|
|
snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
memory_region_init_ram(&vdev->pdev.rom, name, size);
|
|
ptr = memory_region_get_ram_ptr(&vdev->pdev.rom);
|
|
memset(ptr, 0xff, size);
|
|
|
|
while (size) {
|
|
bytes = pread(vdev->fd, ptr + off, size, voff + off);
|
|
if (bytes == 0) {
|
|
break; /* expect that we could get back less than the ROM BAR */
|
|
} else if (bytes > 0) {
|
|
off += bytes;
|
|
size -= bytes;
|
|
} else {
|
|
if (errno == EINTR || errno == EAGAIN) {
|
|
continue;
|
|
}
|
|
error_report("vfio: Error reading device ROM: %m\n");
|
|
memory_region_destroy(&vdev->pdev.rom);
|
|
return -errno;
|
|
}
|
|
}
|
|
|
|
pci_register_bar(&vdev->pdev, PCI_ROM_SLOT, 0, &vdev->pdev.rom);
|
|
vdev->pdev.has_rom = true;
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_connect_container(VFIOGroup *group)
|
|
{
|
|
VFIOContainer *container;
|
|
int ret, fd;
|
|
|
|
if (group->container) {
|
|
return 0;
|
|
}
|
|
|
|
QLIST_FOREACH(container, &container_list, next) {
|
|
if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
|
|
group->container = container;
|
|
QLIST_INSERT_HEAD(&container->group_list, group, container_next);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
fd = qemu_open("/dev/vfio/vfio", O_RDWR);
|
|
if (fd < 0) {
|
|
error_report("vfio: failed to open /dev/vfio/vfio: %m\n");
|
|
return -errno;
|
|
}
|
|
|
|
ret = ioctl(fd, VFIO_GET_API_VERSION);
|
|
if (ret != VFIO_API_VERSION) {
|
|
error_report("vfio: supported vfio version: %d, "
|
|
"reported version: %d\n", VFIO_API_VERSION, ret);
|
|
close(fd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
container = g_malloc0(sizeof(*container));
|
|
container->fd = fd;
|
|
|
|
if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU)) {
|
|
ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
|
|
if (ret) {
|
|
error_report("vfio: failed to set group container: %m\n");
|
|
g_free(container);
|
|
close(fd);
|
|
return -errno;
|
|
}
|
|
|
|
ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU);
|
|
if (ret) {
|
|
error_report("vfio: failed to set iommu for container: %m\n");
|
|
g_free(container);
|
|
close(fd);
|
|
return -errno;
|
|
}
|
|
|
|
container->iommu_data.listener = vfio_memory_listener;
|
|
container->iommu_data.release = vfio_listener_release;
|
|
|
|
memory_listener_register(&container->iommu_data.listener,
|
|
get_system_memory());
|
|
} else {
|
|
error_report("vfio: No available IOMMU models\n");
|
|
g_free(container);
|
|
close(fd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
QLIST_INIT(&container->group_list);
|
|
QLIST_INSERT_HEAD(&container_list, container, next);
|
|
|
|
group->container = container;
|
|
QLIST_INSERT_HEAD(&container->group_list, group, container_next);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_disconnect_container(VFIOGroup *group)
|
|
{
|
|
VFIOContainer *container = group->container;
|
|
|
|
if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
|
|
error_report("vfio: error disconnecting group %d from container\n",
|
|
group->groupid);
|
|
}
|
|
|
|
QLIST_REMOVE(group, container_next);
|
|
group->container = NULL;
|
|
|
|
if (QLIST_EMPTY(&container->group_list)) {
|
|
if (container->iommu_data.release) {
|
|
container->iommu_data.release(container);
|
|
}
|
|
QLIST_REMOVE(container, next);
|
|
DPRINTF("vfio_disconnect_container: close container->fd\n");
|
|
close(container->fd);
|
|
g_free(container);
|
|
}
|
|
}
|
|
|
|
static VFIOGroup *vfio_get_group(int groupid)
|
|
{
|
|
VFIOGroup *group;
|
|
char path[32];
|
|
struct vfio_group_status status = { .argsz = sizeof(status) };
|
|
|
|
QLIST_FOREACH(group, &group_list, next) {
|
|
if (group->groupid == groupid) {
|
|
return group;
|
|
}
|
|
}
|
|
|
|
group = g_malloc0(sizeof(*group));
|
|
|
|
snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
|
|
group->fd = qemu_open(path, O_RDWR);
|
|
if (group->fd < 0) {
|
|
error_report("vfio: error opening %s: %m\n", path);
|
|
g_free(group);
|
|
return NULL;
|
|
}
|
|
|
|
if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
|
|
error_report("vfio: error getting group status: %m\n");
|
|
close(group->fd);
|
|
g_free(group);
|
|
return NULL;
|
|
}
|
|
|
|
if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
|
|
error_report("vfio: error, group %d is not viable, please ensure "
|
|
"all devices within the iommu_group are bound to their "
|
|
"vfio bus driver.\n", groupid);
|
|
close(group->fd);
|
|
g_free(group);
|
|
return NULL;
|
|
}
|
|
|
|
group->groupid = groupid;
|
|
QLIST_INIT(&group->device_list);
|
|
|
|
if (vfio_connect_container(group)) {
|
|
error_report("vfio: failed to setup container for group %d\n", groupid);
|
|
close(group->fd);
|
|
g_free(group);
|
|
return NULL;
|
|
}
|
|
|
|
QLIST_INSERT_HEAD(&group_list, group, next);
|
|
|
|
return group;
|
|
}
|
|
|
|
static void vfio_put_group(VFIOGroup *group)
|
|
{
|
|
if (!QLIST_EMPTY(&group->device_list)) {
|
|
return;
|
|
}
|
|
|
|
vfio_disconnect_container(group);
|
|
QLIST_REMOVE(group, next);
|
|
DPRINTF("vfio_put_group: close group->fd\n");
|
|
close(group->fd);
|
|
g_free(group);
|
|
}
|
|
|
|
static int vfio_get_device(VFIOGroup *group, const char *name, VFIODevice *vdev)
|
|
{
|
|
struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
|
|
struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
|
|
int ret, i;
|
|
|
|
ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name);
|
|
if (ret < 0) {
|
|
error_report("vfio: error getting device %s from group %d: %m\n",
|
|
name, group->groupid);
|
|
error_report("Verify all devices in group %d are bound to vfio-pci "
|
|
"or pci-stub and not already in use\n", group->groupid);
|
|
return ret;
|
|
}
|
|
|
|
vdev->fd = ret;
|
|
vdev->group = group;
|
|
QLIST_INSERT_HEAD(&group->device_list, vdev, next);
|
|
|
|
/* Sanity check device */
|
|
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_INFO, &dev_info);
|
|
if (ret) {
|
|
error_report("vfio: error getting device info: %m\n");
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF("Device %s flags: %u, regions: %u, irgs: %u\n", name,
|
|
dev_info.flags, dev_info.num_regions, dev_info.num_irqs);
|
|
|
|
if (!(dev_info.flags & VFIO_DEVICE_FLAGS_PCI)) {
|
|
error_report("vfio: Um, this isn't a PCI device\n");
|
|
goto error;
|
|
}
|
|
|
|
vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET);
|
|
if (!vdev->reset_works) {
|
|
error_report("Warning, device %s does not support reset\n", name);
|
|
}
|
|
|
|
if (dev_info.num_regions != VFIO_PCI_NUM_REGIONS) {
|
|
error_report("vfio: unexpected number of io regions %u\n",
|
|
dev_info.num_regions);
|
|
goto error;
|
|
}
|
|
|
|
if (dev_info.num_irqs != VFIO_PCI_NUM_IRQS) {
|
|
error_report("vfio: unexpected number of irqs %u\n", dev_info.num_irqs);
|
|
goto error;
|
|
}
|
|
|
|
for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
|
|
reg_info.index = i;
|
|
|
|
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
|
|
if (ret) {
|
|
error_report("vfio: Error getting region %d info: %m\n", i);
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF("Device %s region %d:\n", name, i);
|
|
DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
|
(unsigned long)reg_info.size, (unsigned long)reg_info.offset,
|
|
(unsigned long)reg_info.flags);
|
|
|
|
vdev->bars[i].flags = reg_info.flags;
|
|
vdev->bars[i].size = reg_info.size;
|
|
vdev->bars[i].fd_offset = reg_info.offset;
|
|
vdev->bars[i].fd = vdev->fd;
|
|
vdev->bars[i].nr = i;
|
|
}
|
|
|
|
reg_info.index = VFIO_PCI_ROM_REGION_INDEX;
|
|
|
|
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
|
|
if (ret) {
|
|
error_report("vfio: Error getting ROM info: %m\n");
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF("Device %s ROM:\n", name);
|
|
DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
|
(unsigned long)reg_info.size, (unsigned long)reg_info.offset,
|
|
(unsigned long)reg_info.flags);
|
|
|
|
vdev->rom_size = reg_info.size;
|
|
vdev->rom_offset = reg_info.offset;
|
|
|
|
reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX;
|
|
|
|
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
|
|
if (ret) {
|
|
error_report("vfio: Error getting config info: %m\n");
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF("Device %s config:\n", name);
|
|
DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
|
(unsigned long)reg_info.size, (unsigned long)reg_info.offset,
|
|
(unsigned long)reg_info.flags);
|
|
|
|
vdev->config_size = reg_info.size;
|
|
vdev->config_offset = reg_info.offset;
|
|
|
|
error:
|
|
if (ret) {
|
|
QLIST_REMOVE(vdev, next);
|
|
vdev->group = NULL;
|
|
close(vdev->fd);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_put_device(VFIODevice *vdev)
|
|
{
|
|
QLIST_REMOVE(vdev, next);
|
|
vdev->group = NULL;
|
|
DPRINTF("vfio_put_device: close vdev->fd\n");
|
|
close(vdev->fd);
|
|
if (vdev->msix) {
|
|
g_free(vdev->msix);
|
|
vdev->msix = NULL;
|
|
}
|
|
}
|
|
|
|
static int vfio_initfn(PCIDevice *pdev)
|
|
{
|
|
VFIODevice *pvdev, *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
|
|
VFIOGroup *group;
|
|
char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
|
|
ssize_t len;
|
|
struct stat st;
|
|
int groupid;
|
|
int ret;
|
|
|
|
/* Check that the host device exists */
|
|
snprintf(path, sizeof(path),
|
|
"/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
if (stat(path, &st) < 0) {
|
|
error_report("vfio: error: no such host device: %s\n", path);
|
|
return -errno;
|
|
}
|
|
|
|
strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1);
|
|
|
|
len = readlink(path, iommu_group_path, PATH_MAX);
|
|
if (len <= 0) {
|
|
error_report("vfio: error no iommu_group for device\n");
|
|
return -errno;
|
|
}
|
|
|
|
iommu_group_path[len] = 0;
|
|
group_name = basename(iommu_group_path);
|
|
|
|
if (sscanf(group_name, "%d", &groupid) != 1) {
|
|
error_report("vfio: error reading %s: %m\n", path);
|
|
return -errno;
|
|
}
|
|
|
|
DPRINTF("%s(%04x:%02x:%02x.%x) group %d\n", __func__, vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function, groupid);
|
|
|
|
group = vfio_get_group(groupid);
|
|
if (!group) {
|
|
error_report("vfio: failed to get group %d\n", groupid);
|
|
return -ENOENT;
|
|
}
|
|
|
|
snprintf(path, sizeof(path), "%04x:%02x:%02x.%01x",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
|
|
QLIST_FOREACH(pvdev, &group->device_list, next) {
|
|
if (pvdev->host.domain == vdev->host.domain &&
|
|
pvdev->host.bus == vdev->host.bus &&
|
|
pvdev->host.slot == vdev->host.slot &&
|
|
pvdev->host.function == vdev->host.function) {
|
|
|
|
error_report("vfio: error: device %s is already attached\n", path);
|
|
vfio_put_group(group);
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
|
|
ret = vfio_get_device(group, path, vdev);
|
|
if (ret) {
|
|
error_report("vfio: failed to get device %s\n", path);
|
|
vfio_put_group(group);
|
|
return ret;
|
|
}
|
|
|
|
/* Get a copy of config space */
|
|
ret = pread(vdev->fd, vdev->pdev.config,
|
|
MIN(pci_config_size(&vdev->pdev), vdev->config_size),
|
|
vdev->config_offset);
|
|
if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
|
|
ret = ret < 0 ? -errno : -EFAULT;
|
|
error_report("vfio: Failed to read device config space\n");
|
|
goto out_put;
|
|
}
|
|
|
|
/*
|
|
* Clear host resource mapping info. If we choose not to register a
|
|
* BAR, such as might be the case with the option ROM, we can get
|
|
* confusing, unwritable, residual addresses from the host here.
|
|
*/
|
|
memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
|
|
memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
|
|
|
|
vfio_load_rom(vdev);
|
|
|
|
ret = vfio_early_setup_msix(vdev);
|
|
if (ret) {
|
|
goto out_put;
|
|
}
|
|
|
|
vfio_map_bars(vdev);
|
|
|
|
ret = vfio_add_capabilities(vdev);
|
|
if (ret) {
|
|
goto out_teardown;
|
|
}
|
|
|
|
if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
|
|
vdev->intx.mmap_timer = qemu_new_timer_ms(vm_clock,
|
|
vfio_intx_mmap_enable, vdev);
|
|
ret = vfio_enable_intx(vdev);
|
|
if (ret) {
|
|
goto out_teardown;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_teardown:
|
|
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
|
vfio_teardown_msi(vdev);
|
|
vfio_unmap_bars(vdev);
|
|
out_put:
|
|
vfio_put_device(vdev);
|
|
vfio_put_group(group);
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_exitfn(PCIDevice *pdev)
|
|
{
|
|
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
|
|
VFIOGroup *group = vdev->group;
|
|
|
|
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
|
vfio_disable_interrupts(vdev);
|
|
if (vdev->intx.mmap_timer) {
|
|
qemu_free_timer(vdev->intx.mmap_timer);
|
|
}
|
|
vfio_teardown_msi(vdev);
|
|
vfio_unmap_bars(vdev);
|
|
vfio_put_device(vdev);
|
|
vfio_put_group(group);
|
|
}
|
|
|
|
static void vfio_pci_reset(DeviceState *dev)
|
|
{
|
|
PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev);
|
|
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
|
|
|
|
if (!vdev->reset_works) {
|
|
return;
|
|
}
|
|
|
|
if (ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
|
|
error_report("vfio: Error unable to reset physical device "
|
|
"(%04x:%02x:%02x.%x): %m\n", vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function);
|
|
}
|
|
}
|
|
|
|
static Property vfio_pci_dev_properties[] = {
|
|
DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIODevice, host),
|
|
DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIODevice,
|
|
intx.mmap_timeout, 1100),
|
|
/*
|
|
* TODO - support passed fds... is this necessary?
|
|
* DEFINE_PROP_STRING("vfiofd", VFIODevice, vfiofd_name),
|
|
* DEFINE_PROP_STRING("vfiogroupfd, VFIODevice, vfiogroupfd_name),
|
|
*/
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
|
|
static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
|
|
|
|
dc->reset = vfio_pci_reset;
|
|
dc->props = vfio_pci_dev_properties;
|
|
pdc->init = vfio_initfn;
|
|
pdc->exit = vfio_exitfn;
|
|
pdc->config_read = vfio_pci_read_config;
|
|
pdc->config_write = vfio_pci_write_config;
|
|
}
|
|
|
|
static const TypeInfo vfio_pci_dev_info = {
|
|
.name = "vfio-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VFIODevice),
|
|
.class_init = vfio_pci_dev_class_init,
|
|
};
|
|
|
|
static void register_vfio_pci_dev_type(void)
|
|
{
|
|
type_register_static(&vfio_pci_dev_info);
|
|
}
|
|
|
|
type_init(register_vfio_pci_dev_type)
|