root / hw / misc / vfio.c @ ba25df88
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/*
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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 <linux/vfio.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 <unistd.h> |
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|
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#include "config.h" |
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#include "exec/address-spaces.h" |
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#include "exec/memory.h" |
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#include "hw/pci/msi.h" |
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#include "hw/pci/msix.h" |
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#include "hw/pci/pci.h" |
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#include "qemu-common.h" |
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#include "qemu/error-report.h" |
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#include "qemu/event_notifier.h" |
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#include "qemu/queue.h" |
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#include "qemu/range.h" |
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#include "sysemu/kvm.h" |
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#include "sysemu/sysemu.h" |
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|
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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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|
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/* Extra debugging, trap acceleration paths for more logging */
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#define VFIO_ALLOW_MMAP 1 |
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#define VFIO_ALLOW_KVM_INTX 1 |
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struct VFIODevice;
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typedef struct VFIOQuirk { |
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MemoryRegion mem; |
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struct VFIODevice *vdev;
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QLIST_ENTRY(VFIOQuirk) next; |
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uint32_t data; |
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uint32_t data2; |
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} VFIOQuirk; |
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|
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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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QLIST_HEAD(, VFIOQuirk) quirks; |
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} VFIOBAR; |
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typedef struct VFIOVGARegion { |
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MemoryRegion mem; |
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off_t offset; |
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int nr;
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QLIST_HEAD(, VFIOQuirk) quirks; |
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} VFIOVGARegion; |
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|
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typedef struct VFIOVGA { |
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off_t fd_offset; |
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int fd;
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VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS]; |
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} VFIOVGA; |
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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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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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uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */
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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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VFIOVGA vga; /* 0xa0000, 0x3b0, 0x3c0 */
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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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uint32_t features; |
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#define VFIO_FEATURE_ENABLE_VGA_BIT 0 |
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#define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT) |
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int32_t bootindex; |
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uint8_t pm_cap; |
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bool reset_works;
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bool has_vga;
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} VFIODevice; |
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|
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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_pci_write_config(PCIDevice *pdev, uint32_t addr, |
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uint32_t val, 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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#ifdef CONFIG_KVM /* Unused outside of CONFIG_KVM code */ |
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static void vfio_mask_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_MASK, |
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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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#endif
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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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|
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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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} |
| 294 |
|
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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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} |
| 302 |
|
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static void vfio_enable_intx_kvm(VFIODevice *vdev) |
| 304 |
{
|
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#ifdef CONFIG_KVM
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struct kvm_irqfd irqfd = {
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.fd = event_notifier_get_fd(&vdev->intx.interrupt), |
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.gsi = vdev->intx.route.irq, |
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.flags = KVM_IRQFD_FLAG_RESAMPLE, |
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}; |
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struct vfio_irq_set *irq_set;
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int ret, argsz;
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int32_t *pfd; |
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|
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if (!VFIO_ALLOW_KVM_INTX || !kvm_irqfds_enabled() ||
|
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vdev->intx.route.mode != PCI_INTX_ENABLED || |
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!kvm_check_extension(kvm_state, KVM_CAP_IRQFD_RESAMPLE)) {
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return;
|
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} |
| 320 |
|
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/* Get to a known interrupt state */
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qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev); |
| 323 |
vfio_mask_intx(vdev); |
| 324 |
vdev->intx.pending = false;
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qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
|
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|
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/* Get an eventfd for resample/unmask */
|
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if (event_notifier_init(&vdev->intx.unmask, 0)) { |
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error_report("vfio: Error: event_notifier_init failed eoi");
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goto fail;
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} |
| 332 |
|
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/* KVM triggers it, VFIO listens for it */
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irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask); |
| 335 |
|
| 336 |
if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
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error_report("vfio: Error: Failed to setup resample irqfd: %m");
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goto fail_irqfd;
|
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} |
| 340 |
|
| 341 |
argsz = sizeof(*irq_set) + sizeof(*pfd); |
| 342 |
|
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irq_set = g_malloc0(argsz); |
| 344 |
irq_set->argsz = argsz; |
| 345 |
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK; |
| 346 |
irq_set->index = VFIO_PCI_INTX_IRQ_INDEX; |
| 347 |
irq_set->start = 0;
|
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irq_set->count = 1;
|
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pfd = (int32_t *)&irq_set->data; |
| 350 |
|
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*pfd = irqfd.resamplefd; |
| 352 |
|
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ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
| 354 |
g_free(irq_set); |
| 355 |
if (ret) {
|
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error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
|
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goto fail_vfio;
|
| 358 |
} |
| 359 |
|
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/* Let'em rip */
|
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vfio_unmask_intx(vdev); |
| 362 |
|
| 363 |
vdev->intx.kvm_accel = true;
|
| 364 |
|
| 365 |
DPRINTF("%s(%04x:%02x:%02x.%x) KVM INTx accel enabled\n",
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__func__, vdev->host.domain, vdev->host.bus, |
| 367 |
vdev->host.slot, vdev->host.function); |
| 368 |
|
| 369 |
return;
|
| 370 |
|
| 371 |
fail_vfio:
|
| 372 |
irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN; |
| 373 |
kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd); |
| 374 |
fail_irqfd:
|
| 375 |
event_notifier_cleanup(&vdev->intx.unmask); |
| 376 |
fail:
|
| 377 |
qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
|
| 378 |
vfio_unmask_intx(vdev); |
| 379 |
#endif
|
| 380 |
} |
| 381 |
|
| 382 |
static void vfio_disable_intx_kvm(VFIODevice *vdev) |
| 383 |
{
|
| 384 |
#ifdef CONFIG_KVM
|
| 385 |
struct kvm_irqfd irqfd = {
|
| 386 |
.fd = event_notifier_get_fd(&vdev->intx.interrupt), |
| 387 |
.gsi = vdev->intx.route.irq, |
| 388 |
.flags = KVM_IRQFD_FLAG_DEASSIGN, |
| 389 |
}; |
| 390 |
|
| 391 |
if (!vdev->intx.kvm_accel) {
|
| 392 |
return;
|
| 393 |
} |
| 394 |
|
| 395 |
/*
|
| 396 |
* Get to a known state, hardware masked, QEMU ready to accept new
|
| 397 |
* interrupts, QEMU IRQ de-asserted.
|
| 398 |
*/
|
| 399 |
vfio_mask_intx(vdev); |
| 400 |
vdev->intx.pending = false;
|
| 401 |
qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
|
| 402 |
|
| 403 |
/* Tell KVM to stop listening for an INTx irqfd */
|
| 404 |
if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
|
| 405 |
error_report("vfio: Error: Failed to disable INTx irqfd: %m");
|
| 406 |
} |
| 407 |
|
| 408 |
/* We only need to close the eventfd for VFIO to cleanup the kernel side */
|
| 409 |
event_notifier_cleanup(&vdev->intx.unmask); |
| 410 |
|
| 411 |
/* QEMU starts listening for interrupt events. */
|
| 412 |
qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
|
| 413 |
|
| 414 |
vdev->intx.kvm_accel = false;
|
| 415 |
|
| 416 |
/* If we've missed an event, let it re-fire through QEMU */
|
| 417 |
vfio_unmask_intx(vdev); |
| 418 |
|
| 419 |
DPRINTF("%s(%04x:%02x:%02x.%x) KVM INTx accel disabled\n",
|
| 420 |
__func__, vdev->host.domain, vdev->host.bus, |
| 421 |
vdev->host.slot, vdev->host.function); |
| 422 |
#endif
|
| 423 |
} |
| 424 |
|
| 425 |
static void vfio_update_irq(PCIDevice *pdev) |
| 426 |
{
|
| 427 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 428 |
PCIINTxRoute route; |
| 429 |
|
| 430 |
if (vdev->interrupt != VFIO_INT_INTx) {
|
| 431 |
return;
|
| 432 |
} |
| 433 |
|
| 434 |
route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin); |
| 435 |
|
| 436 |
if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
|
| 437 |
return; /* Nothing changed */ |
| 438 |
} |
| 439 |
|
| 440 |
DPRINTF("%s(%04x:%02x:%02x.%x) IRQ moved %d -> %d\n", __func__,
|
| 441 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 442 |
vdev->host.function, vdev->intx.route.irq, route.irq); |
| 443 |
|
| 444 |
vfio_disable_intx_kvm(vdev); |
| 445 |
|
| 446 |
vdev->intx.route = route; |
| 447 |
|
| 448 |
if (route.mode != PCI_INTX_ENABLED) {
|
| 449 |
return;
|
| 450 |
} |
| 451 |
|
| 452 |
vfio_enable_intx_kvm(vdev); |
| 453 |
|
| 454 |
/* Re-enable the interrupt in cased we missed an EOI */
|
| 455 |
vfio_eoi(vdev); |
| 456 |
} |
| 457 |
|
| 458 |
static int vfio_enable_intx(VFIODevice *vdev) |
| 459 |
{
|
| 460 |
uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
|
| 461 |
int ret, argsz;
|
| 462 |
struct vfio_irq_set *irq_set;
|
| 463 |
int32_t *pfd; |
| 464 |
|
| 465 |
if (!pin) {
|
| 466 |
return 0; |
| 467 |
} |
| 468 |
|
| 469 |
vfio_disable_interrupts(vdev); |
| 470 |
|
| 471 |
vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */ |
| 472 |
|
| 473 |
#ifdef CONFIG_KVM
|
| 474 |
/*
|
| 475 |
* Only conditional to avoid generating error messages on platforms
|
| 476 |
* where we won't actually use the result anyway.
|
| 477 |
*/
|
| 478 |
if (kvm_irqfds_enabled() &&
|
| 479 |
kvm_check_extension(kvm_state, KVM_CAP_IRQFD_RESAMPLE)) {
|
| 480 |
vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev, |
| 481 |
vdev->intx.pin); |
| 482 |
} |
| 483 |
#endif
|
| 484 |
|
| 485 |
ret = event_notifier_init(&vdev->intx.interrupt, 0);
|
| 486 |
if (ret) {
|
| 487 |
error_report("vfio: Error: event_notifier_init failed");
|
| 488 |
return ret;
|
| 489 |
} |
| 490 |
|
| 491 |
argsz = sizeof(*irq_set) + sizeof(*pfd); |
| 492 |
|
| 493 |
irq_set = g_malloc0(argsz); |
| 494 |
irq_set->argsz = argsz; |
| 495 |
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER; |
| 496 |
irq_set->index = VFIO_PCI_INTX_IRQ_INDEX; |
| 497 |
irq_set->start = 0;
|
| 498 |
irq_set->count = 1;
|
| 499 |
pfd = (int32_t *)&irq_set->data; |
| 500 |
|
| 501 |
*pfd = event_notifier_get_fd(&vdev->intx.interrupt); |
| 502 |
qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
|
| 503 |
|
| 504 |
ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
| 505 |
g_free(irq_set); |
| 506 |
if (ret) {
|
| 507 |
error_report("vfio: Error: Failed to setup INTx fd: %m");
|
| 508 |
qemu_set_fd_handler(*pfd, NULL, NULL, vdev); |
| 509 |
event_notifier_cleanup(&vdev->intx.interrupt); |
| 510 |
return -errno;
|
| 511 |
} |
| 512 |
|
| 513 |
vfio_enable_intx_kvm(vdev); |
| 514 |
|
| 515 |
vdev->interrupt = VFIO_INT_INTx; |
| 516 |
|
| 517 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 518 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 519 |
|
| 520 |
return 0; |
| 521 |
} |
| 522 |
|
| 523 |
static void vfio_disable_intx(VFIODevice *vdev) |
| 524 |
{
|
| 525 |
int fd;
|
| 526 |
|
| 527 |
qemu_del_timer(vdev->intx.mmap_timer); |
| 528 |
vfio_disable_intx_kvm(vdev); |
| 529 |
vfio_disable_irqindex(vdev, VFIO_PCI_INTX_IRQ_INDEX); |
| 530 |
vdev->intx.pending = false;
|
| 531 |
qemu_set_irq(vdev->pdev.irq[vdev->intx.pin], 0);
|
| 532 |
vfio_mmap_set_enabled(vdev, true);
|
| 533 |
|
| 534 |
fd = event_notifier_get_fd(&vdev->intx.interrupt); |
| 535 |
qemu_set_fd_handler(fd, NULL, NULL, vdev); |
| 536 |
event_notifier_cleanup(&vdev->intx.interrupt); |
| 537 |
|
| 538 |
vdev->interrupt = VFIO_INT_NONE; |
| 539 |
|
| 540 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 541 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 542 |
} |
| 543 |
|
| 544 |
/*
|
| 545 |
* MSI/X
|
| 546 |
*/
|
| 547 |
static void vfio_msi_interrupt(void *opaque) |
| 548 |
{
|
| 549 |
VFIOMSIVector *vector = opaque; |
| 550 |
VFIODevice *vdev = vector->vdev; |
| 551 |
int nr = vector - vdev->msi_vectors;
|
| 552 |
|
| 553 |
if (!event_notifier_test_and_clear(&vector->interrupt)) {
|
| 554 |
return;
|
| 555 |
} |
| 556 |
|
| 557 |
DPRINTF("%s(%04x:%02x:%02x.%x) vector %d\n", __func__,
|
| 558 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 559 |
vdev->host.function, nr); |
| 560 |
|
| 561 |
if (vdev->interrupt == VFIO_INT_MSIX) {
|
| 562 |
msix_notify(&vdev->pdev, nr); |
| 563 |
} else if (vdev->interrupt == VFIO_INT_MSI) { |
| 564 |
msi_notify(&vdev->pdev, nr); |
| 565 |
} else {
|
| 566 |
error_report("vfio: MSI interrupt receieved, but not enabled?");
|
| 567 |
} |
| 568 |
} |
| 569 |
|
| 570 |
static int vfio_enable_vectors(VFIODevice *vdev, bool msix) |
| 571 |
{
|
| 572 |
struct vfio_irq_set *irq_set;
|
| 573 |
int ret = 0, i, argsz; |
| 574 |
int32_t *fds; |
| 575 |
|
| 576 |
argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds)); |
| 577 |
|
| 578 |
irq_set = g_malloc0(argsz); |
| 579 |
irq_set->argsz = argsz; |
| 580 |
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER; |
| 581 |
irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX; |
| 582 |
irq_set->start = 0;
|
| 583 |
irq_set->count = vdev->nr_vectors; |
| 584 |
fds = (int32_t *)&irq_set->data; |
| 585 |
|
| 586 |
for (i = 0; i < vdev->nr_vectors; i++) { |
| 587 |
if (!vdev->msi_vectors[i].use) {
|
| 588 |
fds[i] = -1;
|
| 589 |
continue;
|
| 590 |
} |
| 591 |
|
| 592 |
fds[i] = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt); |
| 593 |
} |
| 594 |
|
| 595 |
ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
| 596 |
|
| 597 |
g_free(irq_set); |
| 598 |
|
| 599 |
return ret;
|
| 600 |
} |
| 601 |
|
| 602 |
static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr, |
| 603 |
MSIMessage *msg, IOHandler *handler) |
| 604 |
{
|
| 605 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 606 |
VFIOMSIVector *vector; |
| 607 |
int ret;
|
| 608 |
|
| 609 |
DPRINTF("%s(%04x:%02x:%02x.%x) vector %d used\n", __func__,
|
| 610 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 611 |
vdev->host.function, nr); |
| 612 |
|
| 613 |
vector = &vdev->msi_vectors[nr]; |
| 614 |
vector->vdev = vdev; |
| 615 |
vector->use = true;
|
| 616 |
|
| 617 |
msix_vector_use(pdev, nr); |
| 618 |
|
| 619 |
if (event_notifier_init(&vector->interrupt, 0)) { |
| 620 |
error_report("vfio: Error: event_notifier_init failed");
|
| 621 |
} |
| 622 |
|
| 623 |
/*
|
| 624 |
* Attempt to enable route through KVM irqchip,
|
| 625 |
* default to userspace handling if unavailable.
|
| 626 |
*/
|
| 627 |
vector->virq = msg ? kvm_irqchip_add_msi_route(kvm_state, *msg) : -1;
|
| 628 |
if (vector->virq < 0 || |
| 629 |
kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt, |
| 630 |
vector->virq) < 0) {
|
| 631 |
if (vector->virq >= 0) { |
| 632 |
kvm_irqchip_release_virq(kvm_state, vector->virq); |
| 633 |
vector->virq = -1;
|
| 634 |
} |
| 635 |
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
| 636 |
handler, NULL, vector);
|
| 637 |
} |
| 638 |
|
| 639 |
/*
|
| 640 |
* We don't want to have the host allocate all possible MSI vectors
|
| 641 |
* for a device if they're not in use, so we shutdown and incrementally
|
| 642 |
* increase them as needed.
|
| 643 |
*/
|
| 644 |
if (vdev->nr_vectors < nr + 1) { |
| 645 |
vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX); |
| 646 |
vdev->nr_vectors = nr + 1;
|
| 647 |
ret = vfio_enable_vectors(vdev, true);
|
| 648 |
if (ret) {
|
| 649 |
error_report("vfio: failed to enable vectors, %d", ret);
|
| 650 |
} |
| 651 |
} else {
|
| 652 |
int argsz;
|
| 653 |
struct vfio_irq_set *irq_set;
|
| 654 |
int32_t *pfd; |
| 655 |
|
| 656 |
argsz = sizeof(*irq_set) + sizeof(*pfd); |
| 657 |
|
| 658 |
irq_set = g_malloc0(argsz); |
| 659 |
irq_set->argsz = argsz; |
| 660 |
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | |
| 661 |
VFIO_IRQ_SET_ACTION_TRIGGER; |
| 662 |
irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX; |
| 663 |
irq_set->start = nr; |
| 664 |
irq_set->count = 1;
|
| 665 |
pfd = (int32_t *)&irq_set->data; |
| 666 |
|
| 667 |
*pfd = event_notifier_get_fd(&vector->interrupt); |
| 668 |
|
| 669 |
ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
| 670 |
g_free(irq_set); |
| 671 |
if (ret) {
|
| 672 |
error_report("vfio: failed to modify vector, %d", ret);
|
| 673 |
} |
| 674 |
} |
| 675 |
|
| 676 |
return 0; |
| 677 |
} |
| 678 |
|
| 679 |
static int vfio_msix_vector_use(PCIDevice *pdev, |
| 680 |
unsigned int nr, MSIMessage msg) |
| 681 |
{
|
| 682 |
return vfio_msix_vector_do_use(pdev, nr, &msg, vfio_msi_interrupt);
|
| 683 |
} |
| 684 |
|
| 685 |
static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr) |
| 686 |
{
|
| 687 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 688 |
VFIOMSIVector *vector = &vdev->msi_vectors[nr]; |
| 689 |
int argsz;
|
| 690 |
struct vfio_irq_set *irq_set;
|
| 691 |
int32_t *pfd; |
| 692 |
|
| 693 |
DPRINTF("%s(%04x:%02x:%02x.%x) vector %d released\n", __func__,
|
| 694 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 695 |
vdev->host.function, nr); |
| 696 |
|
| 697 |
/*
|
| 698 |
* XXX What's the right thing to do here? This turns off the interrupt
|
| 699 |
* completely, but do we really just want to switch the interrupt to
|
| 700 |
* bouncing through userspace and let msix.c drop it? Not sure.
|
| 701 |
*/
|
| 702 |
msix_vector_unuse(pdev, nr); |
| 703 |
|
| 704 |
argsz = sizeof(*irq_set) + sizeof(*pfd); |
| 705 |
|
| 706 |
irq_set = g_malloc0(argsz); |
| 707 |
irq_set->argsz = argsz; |
| 708 |
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | |
| 709 |
VFIO_IRQ_SET_ACTION_TRIGGER; |
| 710 |
irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX; |
| 711 |
irq_set->start = nr; |
| 712 |
irq_set->count = 1;
|
| 713 |
pfd = (int32_t *)&irq_set->data; |
| 714 |
|
| 715 |
*pfd = -1;
|
| 716 |
|
| 717 |
ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); |
| 718 |
|
| 719 |
g_free(irq_set); |
| 720 |
|
| 721 |
if (vector->virq < 0) { |
| 722 |
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
| 723 |
NULL, NULL, NULL); |
| 724 |
} else {
|
| 725 |
kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt, |
| 726 |
vector->virq); |
| 727 |
kvm_irqchip_release_virq(kvm_state, vector->virq); |
| 728 |
vector->virq = -1;
|
| 729 |
} |
| 730 |
|
| 731 |
event_notifier_cleanup(&vector->interrupt); |
| 732 |
vector->use = false;
|
| 733 |
} |
| 734 |
|
| 735 |
static void vfio_enable_msix(VFIODevice *vdev) |
| 736 |
{
|
| 737 |
vfio_disable_interrupts(vdev); |
| 738 |
|
| 739 |
vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
|
| 740 |
|
| 741 |
vdev->interrupt = VFIO_INT_MSIX; |
| 742 |
|
| 743 |
/*
|
| 744 |
* Some communication channels between VF & PF or PF & fw rely on the
|
| 745 |
* physical state of the device and expect that enabling MSI-X from the
|
| 746 |
* guest enables the same on the host. When our guest is Linux, the
|
| 747 |
* guest driver call to pci_enable_msix() sets the enabling bit in the
|
| 748 |
* MSI-X capability, but leaves the vector table masked. We therefore
|
| 749 |
* can't rely on a vector_use callback (from request_irq() in the guest)
|
| 750 |
* to switch the physical device into MSI-X mode because that may come a
|
| 751 |
* long time after pci_enable_msix(). This code enables vector 0 with
|
| 752 |
* triggering to userspace, then immediately release the vector, leaving
|
| 753 |
* the physical device with no vectors enabled, but MSI-X enabled, just
|
| 754 |
* like the guest view.
|
| 755 |
*/
|
| 756 |
vfio_msix_vector_do_use(&vdev->pdev, 0, NULL, NULL); |
| 757 |
vfio_msix_vector_release(&vdev->pdev, 0);
|
| 758 |
|
| 759 |
if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
|
| 760 |
vfio_msix_vector_release, NULL)) {
|
| 761 |
error_report("vfio: msix_set_vector_notifiers failed");
|
| 762 |
} |
| 763 |
|
| 764 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 765 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 766 |
} |
| 767 |
|
| 768 |
static void vfio_enable_msi(VFIODevice *vdev) |
| 769 |
{
|
| 770 |
int ret, i;
|
| 771 |
|
| 772 |
vfio_disable_interrupts(vdev); |
| 773 |
|
| 774 |
vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev); |
| 775 |
retry:
|
| 776 |
vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
|
| 777 |
|
| 778 |
for (i = 0; i < vdev->nr_vectors; i++) { |
| 779 |
MSIMessage msg; |
| 780 |
VFIOMSIVector *vector = &vdev->msi_vectors[i]; |
| 781 |
|
| 782 |
vector->vdev = vdev; |
| 783 |
vector->use = true;
|
| 784 |
|
| 785 |
if (event_notifier_init(&vector->interrupt, 0)) { |
| 786 |
error_report("vfio: Error: event_notifier_init failed");
|
| 787 |
} |
| 788 |
|
| 789 |
msg = msi_get_message(&vdev->pdev, i); |
| 790 |
|
| 791 |
/*
|
| 792 |
* Attempt to enable route through KVM irqchip,
|
| 793 |
* default to userspace handling if unavailable.
|
| 794 |
*/
|
| 795 |
vector->virq = kvm_irqchip_add_msi_route(kvm_state, msg); |
| 796 |
if (vector->virq < 0 || |
| 797 |
kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt, |
| 798 |
vector->virq) < 0) {
|
| 799 |
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
| 800 |
vfio_msi_interrupt, NULL, vector);
|
| 801 |
} |
| 802 |
} |
| 803 |
|
| 804 |
ret = vfio_enable_vectors(vdev, false);
|
| 805 |
if (ret) {
|
| 806 |
if (ret < 0) { |
| 807 |
error_report("vfio: Error: Failed to setup MSI fds: %m");
|
| 808 |
} else if (ret != vdev->nr_vectors) { |
| 809 |
error_report("vfio: Error: Failed to enable %d "
|
| 810 |
"MSI vectors, retry with %d", vdev->nr_vectors, ret);
|
| 811 |
} |
| 812 |
|
| 813 |
for (i = 0; i < vdev->nr_vectors; i++) { |
| 814 |
VFIOMSIVector *vector = &vdev->msi_vectors[i]; |
| 815 |
if (vector->virq >= 0) { |
| 816 |
kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt, |
| 817 |
vector->virq); |
| 818 |
kvm_irqchip_release_virq(kvm_state, vector->virq); |
| 819 |
vector->virq = -1;
|
| 820 |
} else {
|
| 821 |
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
| 822 |
NULL, NULL, NULL); |
| 823 |
} |
| 824 |
event_notifier_cleanup(&vector->interrupt); |
| 825 |
} |
| 826 |
|
| 827 |
g_free(vdev->msi_vectors); |
| 828 |
|
| 829 |
if (ret > 0 && ret != vdev->nr_vectors) { |
| 830 |
vdev->nr_vectors = ret; |
| 831 |
goto retry;
|
| 832 |
} |
| 833 |
vdev->nr_vectors = 0;
|
| 834 |
|
| 835 |
return;
|
| 836 |
} |
| 837 |
|
| 838 |
vdev->interrupt = VFIO_INT_MSI; |
| 839 |
|
| 840 |
DPRINTF("%s(%04x:%02x:%02x.%x) Enabled %d MSI vectors\n", __func__,
|
| 841 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 842 |
vdev->host.function, vdev->nr_vectors); |
| 843 |
} |
| 844 |
|
| 845 |
static void vfio_disable_msi_common(VFIODevice *vdev) |
| 846 |
{
|
| 847 |
g_free(vdev->msi_vectors); |
| 848 |
vdev->msi_vectors = NULL;
|
| 849 |
vdev->nr_vectors = 0;
|
| 850 |
vdev->interrupt = VFIO_INT_NONE; |
| 851 |
|
| 852 |
vfio_enable_intx(vdev); |
| 853 |
} |
| 854 |
|
| 855 |
static void vfio_disable_msix(VFIODevice *vdev) |
| 856 |
{
|
| 857 |
msix_unset_vector_notifiers(&vdev->pdev); |
| 858 |
|
| 859 |
if (vdev->nr_vectors) {
|
| 860 |
vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX); |
| 861 |
} |
| 862 |
|
| 863 |
vfio_disable_msi_common(vdev); |
| 864 |
|
| 865 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 866 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 867 |
} |
| 868 |
|
| 869 |
static void vfio_disable_msi(VFIODevice *vdev) |
| 870 |
{
|
| 871 |
int i;
|
| 872 |
|
| 873 |
vfio_disable_irqindex(vdev, VFIO_PCI_MSI_IRQ_INDEX); |
| 874 |
|
| 875 |
for (i = 0; i < vdev->nr_vectors; i++) { |
| 876 |
VFIOMSIVector *vector = &vdev->msi_vectors[i]; |
| 877 |
|
| 878 |
if (!vector->use) {
|
| 879 |
continue;
|
| 880 |
} |
| 881 |
|
| 882 |
if (vector->virq >= 0) { |
| 883 |
kvm_irqchip_remove_irqfd_notifier(kvm_state, |
| 884 |
&vector->interrupt, vector->virq); |
| 885 |
kvm_irqchip_release_virq(kvm_state, vector->virq); |
| 886 |
vector->virq = -1;
|
| 887 |
} else {
|
| 888 |
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |
| 889 |
NULL, NULL, NULL); |
| 890 |
} |
| 891 |
|
| 892 |
event_notifier_cleanup(&vector->interrupt); |
| 893 |
} |
| 894 |
|
| 895 |
vfio_disable_msi_common(vdev); |
| 896 |
|
| 897 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 898 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 899 |
} |
| 900 |
|
| 901 |
/*
|
| 902 |
* IO Port/MMIO - Beware of the endians, VFIO is always little endian
|
| 903 |
*/
|
| 904 |
static void vfio_bar_write(void *opaque, hwaddr addr, |
| 905 |
uint64_t data, unsigned size)
|
| 906 |
{
|
| 907 |
VFIOBAR *bar = opaque; |
| 908 |
union {
|
| 909 |
uint8_t byte; |
| 910 |
uint16_t word; |
| 911 |
uint32_t dword; |
| 912 |
uint64_t qword; |
| 913 |
} buf; |
| 914 |
|
| 915 |
switch (size) {
|
| 916 |
case 1: |
| 917 |
buf.byte = data; |
| 918 |
break;
|
| 919 |
case 2: |
| 920 |
buf.word = cpu_to_le16(data); |
| 921 |
break;
|
| 922 |
case 4: |
| 923 |
buf.dword = cpu_to_le32(data); |
| 924 |
break;
|
| 925 |
default:
|
| 926 |
hw_error("vfio: unsupported write size, %d bytes\n", size);
|
| 927 |
break;
|
| 928 |
} |
| 929 |
|
| 930 |
if (pwrite(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
|
| 931 |
error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m", |
| 932 |
__func__, addr, data, size); |
| 933 |
} |
| 934 |
|
| 935 |
#ifdef DEBUG_VFIO
|
| 936 |
{
|
| 937 |
VFIODevice *vdev = container_of(bar, VFIODevice, bars[bar->nr]); |
| 938 |
|
| 939 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx", 0x%"PRIx64 |
| 940 |
", %d)\n", __func__, vdev->host.domain, vdev->host.bus,
|
| 941 |
vdev->host.slot, vdev->host.function, bar->nr, addr, |
| 942 |
data, size); |
| 943 |
} |
| 944 |
#endif
|
| 945 |
|
| 946 |
/*
|
| 947 |
* A read or write to a BAR always signals an INTx EOI. This will
|
| 948 |
* do nothing if not pending (including not in INTx mode). We assume
|
| 949 |
* that a BAR access is in response to an interrupt and that BAR
|
| 950 |
* accesses will service the interrupt. Unfortunately, we don't know
|
| 951 |
* which access will service the interrupt, so we're potentially
|
| 952 |
* getting quite a few host interrupts per guest interrupt.
|
| 953 |
*/
|
| 954 |
vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr])); |
| 955 |
} |
| 956 |
|
| 957 |
static uint64_t vfio_bar_read(void *opaque, |
| 958 |
hwaddr addr, unsigned size)
|
| 959 |
{
|
| 960 |
VFIOBAR *bar = opaque; |
| 961 |
union {
|
| 962 |
uint8_t byte; |
| 963 |
uint16_t word; |
| 964 |
uint32_t dword; |
| 965 |
uint64_t qword; |
| 966 |
} buf; |
| 967 |
uint64_t data = 0;
|
| 968 |
|
| 969 |
if (pread(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
|
| 970 |
error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m", |
| 971 |
__func__, addr, size); |
| 972 |
return (uint64_t)-1; |
| 973 |
} |
| 974 |
|
| 975 |
switch (size) {
|
| 976 |
case 1: |
| 977 |
data = buf.byte; |
| 978 |
break;
|
| 979 |
case 2: |
| 980 |
data = le16_to_cpu(buf.word); |
| 981 |
break;
|
| 982 |
case 4: |
| 983 |
data = le32_to_cpu(buf.dword); |
| 984 |
break;
|
| 985 |
default:
|
| 986 |
hw_error("vfio: unsupported read size, %d bytes\n", size);
|
| 987 |
break;
|
| 988 |
} |
| 989 |
|
| 990 |
#ifdef DEBUG_VFIO
|
| 991 |
{
|
| 992 |
VFIODevice *vdev = container_of(bar, VFIODevice, bars[bar->nr]); |
| 993 |
|
| 994 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx
|
| 995 |
", %d) = 0x%"PRIx64"\n", __func__, vdev->host.domain, |
| 996 |
vdev->host.bus, vdev->host.slot, vdev->host.function, |
| 997 |
bar->nr, addr, size, data); |
| 998 |
} |
| 999 |
#endif
|
| 1000 |
|
| 1001 |
/* Same as write above */
|
| 1002 |
vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr])); |
| 1003 |
|
| 1004 |
return data;
|
| 1005 |
} |
| 1006 |
|
| 1007 |
static const MemoryRegionOps vfio_bar_ops = { |
| 1008 |
.read = vfio_bar_read, |
| 1009 |
.write = vfio_bar_write, |
| 1010 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1011 |
}; |
| 1012 |
|
| 1013 |
static void vfio_vga_write(void *opaque, hwaddr addr, |
| 1014 |
uint64_t data, unsigned size)
|
| 1015 |
{
|
| 1016 |
VFIOVGARegion *region = opaque; |
| 1017 |
VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]); |
| 1018 |
union {
|
| 1019 |
uint8_t byte; |
| 1020 |
uint16_t word; |
| 1021 |
uint32_t dword; |
| 1022 |
uint64_t qword; |
| 1023 |
} buf; |
| 1024 |
off_t offset = vga->fd_offset + region->offset + addr; |
| 1025 |
|
| 1026 |
switch (size) {
|
| 1027 |
case 1: |
| 1028 |
buf.byte = data; |
| 1029 |
break;
|
| 1030 |
case 2: |
| 1031 |
buf.word = cpu_to_le16(data); |
| 1032 |
break;
|
| 1033 |
case 4: |
| 1034 |
buf.dword = cpu_to_le32(data); |
| 1035 |
break;
|
| 1036 |
default:
|
| 1037 |
hw_error("vfio: unsupported write size, %d bytes\n", size);
|
| 1038 |
break;
|
| 1039 |
} |
| 1040 |
|
| 1041 |
if (pwrite(vga->fd, &buf, size, offset) != size) {
|
| 1042 |
error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m", |
| 1043 |
__func__, region->offset + addr, data, size); |
| 1044 |
} |
| 1045 |
|
| 1046 |
DPRINTF("%s(0x%"HWADDR_PRIx", 0x%"PRIx64", %d)\n", |
| 1047 |
__func__, region->offset + addr, data, size); |
| 1048 |
} |
| 1049 |
|
| 1050 |
static uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size) |
| 1051 |
{
|
| 1052 |
VFIOVGARegion *region = opaque; |
| 1053 |
VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]); |
| 1054 |
union {
|
| 1055 |
uint8_t byte; |
| 1056 |
uint16_t word; |
| 1057 |
uint32_t dword; |
| 1058 |
uint64_t qword; |
| 1059 |
} buf; |
| 1060 |
uint64_t data = 0;
|
| 1061 |
off_t offset = vga->fd_offset + region->offset + addr; |
| 1062 |
|
| 1063 |
if (pread(vga->fd, &buf, size, offset) != size) {
|
| 1064 |
error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m", |
| 1065 |
__func__, region->offset + addr, size); |
| 1066 |
return (uint64_t)-1; |
| 1067 |
} |
| 1068 |
|
| 1069 |
switch (size) {
|
| 1070 |
case 1: |
| 1071 |
data = buf.byte; |
| 1072 |
break;
|
| 1073 |
case 2: |
| 1074 |
data = le16_to_cpu(buf.word); |
| 1075 |
break;
|
| 1076 |
case 4: |
| 1077 |
data = le32_to_cpu(buf.dword); |
| 1078 |
break;
|
| 1079 |
default:
|
| 1080 |
hw_error("vfio: unsupported read size, %d bytes\n", size);
|
| 1081 |
break;
|
| 1082 |
} |
| 1083 |
|
| 1084 |
DPRINTF("%s(0x%"HWADDR_PRIx", %d) = 0x%"PRIx64"\n", |
| 1085 |
__func__, region->offset + addr, size, data); |
| 1086 |
|
| 1087 |
return data;
|
| 1088 |
} |
| 1089 |
|
| 1090 |
static const MemoryRegionOps vfio_vga_ops = { |
| 1091 |
.read = vfio_vga_read, |
| 1092 |
.write = vfio_vga_write, |
| 1093 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1094 |
}; |
| 1095 |
|
| 1096 |
/*
|
| 1097 |
* Device specific quirks
|
| 1098 |
*/
|
| 1099 |
|
| 1100 |
#define PCI_VENDOR_ID_ATI 0x1002 |
| 1101 |
|
| 1102 |
/*
|
| 1103 |
* Device 1002:68f9 (Advanced Micro Devices [AMD] nee ATI Cedar PRO [Radeon
|
| 1104 |
* HD 5450/6350]) reports the upper byte of the physical address of the
|
| 1105 |
* I/O port BAR4 through VGA register 0x3c3. The BAR is 256 bytes, so the
|
| 1106 |
* lower byte is known to be zero. Probing for this quirk reads 0xff from
|
| 1107 |
* port 0x3c3 on some devices so we store the physical address and replace
|
| 1108 |
* reads with the virtual address any time it matches. XXX Research when
|
| 1109 |
* to enable quirk.
|
| 1110 |
*/
|
| 1111 |
static uint64_t vfio_ati_3c3_quirk_read(void *opaque, |
| 1112 |
hwaddr addr, unsigned size)
|
| 1113 |
{
|
| 1114 |
VFIOQuirk *quirk = opaque; |
| 1115 |
VFIODevice *vdev = quirk->vdev; |
| 1116 |
PCIDevice *pdev = &vdev->pdev; |
| 1117 |
uint64_t data = vfio_vga_read(&vdev->vga.region[QEMU_PCI_VGA_IO_HI], |
| 1118 |
addr + 0x3, size);
|
| 1119 |
|
| 1120 |
if (data == quirk->data) {
|
| 1121 |
data = pci_get_byte(pdev->config + PCI_BASE_ADDRESS_4 + 1);
|
| 1122 |
DPRINTF("%s(0x3c3, 1) = 0x%"PRIx64"\n", __func__, data); |
| 1123 |
} |
| 1124 |
|
| 1125 |
return data;
|
| 1126 |
} |
| 1127 |
|
| 1128 |
static const MemoryRegionOps vfio_ati_3c3_quirk = { |
| 1129 |
.read = vfio_ati_3c3_quirk_read, |
| 1130 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1131 |
}; |
| 1132 |
|
| 1133 |
static void vfio_vga_probe_ati_3c3_quirk(VFIODevice *vdev) |
| 1134 |
{
|
| 1135 |
PCIDevice *pdev = &vdev->pdev; |
| 1136 |
off_t physoffset = vdev->config_offset + PCI_BASE_ADDRESS_4; |
| 1137 |
uint32_t physbar; |
| 1138 |
VFIOQuirk *quirk; |
| 1139 |
|
| 1140 |
if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI ||
|
| 1141 |
vdev->bars[4].size < 256) { |
| 1142 |
return;
|
| 1143 |
} |
| 1144 |
|
| 1145 |
/* Get I/O port BAR physical address */
|
| 1146 |
if (pread(vdev->fd, &physbar, 4, physoffset) != 4) { |
| 1147 |
error_report("vfio: probe failed for ATI/AMD 0x3c3 quirk on device "
|
| 1148 |
"%04x:%02x:%02x.%x", vdev->host.domain,
|
| 1149 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 1150 |
return;
|
| 1151 |
} |
| 1152 |
|
| 1153 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1154 |
quirk->vdev = vdev; |
| 1155 |
quirk->data = (physbar >> 8) & 0xff; |
| 1156 |
|
| 1157 |
memory_region_init_io(&quirk->mem, &vfio_ati_3c3_quirk, quirk, |
| 1158 |
"vfio-ati-3c3-quirk", 1); |
| 1159 |
memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem, 3,
|
| 1160 |
&quirk->mem); |
| 1161 |
|
| 1162 |
QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks, |
| 1163 |
quirk, next); |
| 1164 |
|
| 1165 |
DPRINTF("Enabled ATI/AMD quirk 0x3c3 for device %04x:%02x:%02x.%x\n",
|
| 1166 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1167 |
vdev->host.function); |
| 1168 |
} |
| 1169 |
|
| 1170 |
/*
|
| 1171 |
* Device 1002:68f9 (Advanced Micro Devices [AMD] nee ATI Cedar PRO [Radeon
|
| 1172 |
* HD 5450/6350]) reports the physical address of MMIO BAR0 through a
|
| 1173 |
* write/read operation on I/O port BAR4. When uint32_t 0x4010 is written
|
| 1174 |
* to offset 0x0, the subsequent read from offset 0x4 returns the contents
|
| 1175 |
* of BAR0. Test for this quirk on all ATI/AMD devices. XXX - Note that
|
| 1176 |
* 0x10 is the offset of BAR0 in config sapce, is this a window to all of
|
| 1177 |
* config space?
|
| 1178 |
*/
|
| 1179 |
static uint64_t vfio_ati_4010_quirk_read(void *opaque, |
| 1180 |
hwaddr addr, unsigned size)
|
| 1181 |
{
|
| 1182 |
VFIOQuirk *quirk = opaque; |
| 1183 |
VFIODevice *vdev = quirk->vdev; |
| 1184 |
PCIDevice *pdev = &vdev->pdev; |
| 1185 |
uint64_t data = vfio_bar_read(&vdev->bars[4], addr, size);
|
| 1186 |
|
| 1187 |
if (addr == 4 && size == 4 && quirk->data) { |
| 1188 |
data = pci_get_long(pdev->config + PCI_BASE_ADDRESS_0); |
| 1189 |
DPRINTF("%s(BAR4+0x4) = 0x%"PRIx64"\n", __func__, data); |
| 1190 |
} |
| 1191 |
|
| 1192 |
quirk->data = 0;
|
| 1193 |
|
| 1194 |
return data;
|
| 1195 |
} |
| 1196 |
|
| 1197 |
static void vfio_ati_4010_quirk_write(void *opaque, hwaddr addr, |
| 1198 |
uint64_t data, unsigned size)
|
| 1199 |
{
|
| 1200 |
VFIOQuirk *quirk = opaque; |
| 1201 |
VFIODevice *vdev = quirk->vdev; |
| 1202 |
|
| 1203 |
vfio_bar_write(&vdev->bars[4], addr, data, size);
|
| 1204 |
|
| 1205 |
quirk->data = (addr == 0 && size == 4 && data == 0x4010) ? 1 : 0; |
| 1206 |
} |
| 1207 |
|
| 1208 |
static const MemoryRegionOps vfio_ati_4010_quirk = { |
| 1209 |
.read = vfio_ati_4010_quirk_read, |
| 1210 |
.write = vfio_ati_4010_quirk_write, |
| 1211 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1212 |
}; |
| 1213 |
|
| 1214 |
static void vfio_probe_ati_4010_quirk(VFIODevice *vdev, int nr) |
| 1215 |
{
|
| 1216 |
PCIDevice *pdev = &vdev->pdev; |
| 1217 |
off_t physoffset = vdev->config_offset + PCI_BASE_ADDRESS_0; |
| 1218 |
uint32_t physbar0; |
| 1219 |
uint64_t data; |
| 1220 |
VFIOQuirk *quirk; |
| 1221 |
|
| 1222 |
if (!vdev->has_vga || nr != 4 || !vdev->bars[0].size || |
| 1223 |
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
|
| 1224 |
return;
|
| 1225 |
} |
| 1226 |
|
| 1227 |
/* Get I/O port BAR physical address */
|
| 1228 |
if (pread(vdev->fd, &physbar0, 4, physoffset) != 4) { |
| 1229 |
error_report("vfio: probe failed for ATI/AMD 0x4010 quirk on device "
|
| 1230 |
"%04x:%02x:%02x.%x", vdev->host.domain,
|
| 1231 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 1232 |
return;
|
| 1233 |
} |
| 1234 |
|
| 1235 |
/* Write 0x4010 to I/O port BAR offset 0 */
|
| 1236 |
vfio_bar_write(&vdev->bars[4], 0, 0x4010, 4); |
| 1237 |
/* Read back result */
|
| 1238 |
data = vfio_bar_read(&vdev->bars[4], 4, 4); |
| 1239 |
|
| 1240 |
/* If the register matches the physical address of BAR0, we need a quirk */
|
| 1241 |
if (data != physbar0) {
|
| 1242 |
return;
|
| 1243 |
} |
| 1244 |
|
| 1245 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1246 |
quirk->vdev = vdev; |
| 1247 |
|
| 1248 |
memory_region_init_io(&quirk->mem, &vfio_ati_4010_quirk, quirk, |
| 1249 |
"vfio-ati-4010-quirk", 8); |
| 1250 |
memory_region_add_subregion_overlap(&vdev->bars[nr].mem, 0, &quirk->mem, 1); |
| 1251 |
|
| 1252 |
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); |
| 1253 |
|
| 1254 |
DPRINTF("Enabled ATI/AMD quirk 0x4010 for device %04x:%02x:%02x.%x\n",
|
| 1255 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1256 |
vdev->host.function); |
| 1257 |
} |
| 1258 |
|
| 1259 |
/*
|
| 1260 |
* Device 1002:5b63 (Advanced Micro Devices [AMD] nee ATI RV370 [Radeon X550])
|
| 1261 |
* retrieves the upper half of the MMIO BAR0 physical address by writing
|
| 1262 |
* 0xf10 to I/O port BAR1 offset 0 and reading the result from offset 6.
|
| 1263 |
* XXX - 0x10 is the offset of BAR0 in PCI config space, this could provide
|
| 1264 |
* full access to config space. Config space is little endian, so the data
|
| 1265 |
* register probably starts at 0x4.
|
| 1266 |
*/
|
| 1267 |
static uint64_t vfio_ati_f10_quirk_read(void *opaque, |
| 1268 |
hwaddr addr, unsigned size)
|
| 1269 |
{
|
| 1270 |
VFIOQuirk *quirk = opaque; |
| 1271 |
VFIODevice *vdev = quirk->vdev; |
| 1272 |
PCIDevice *pdev = &vdev->pdev; |
| 1273 |
uint64_t data = vfio_bar_read(&vdev->bars[1], addr, size);
|
| 1274 |
|
| 1275 |
if (addr == 6 && size == 2 && quirk->data) { |
| 1276 |
data = pci_get_word(pdev->config + PCI_BASE_ADDRESS_0 + 2);
|
| 1277 |
DPRINTF("%s(BAR1+0x6) = 0x%"PRIx64"\n", __func__, data); |
| 1278 |
} |
| 1279 |
|
| 1280 |
quirk->data = 0;
|
| 1281 |
|
| 1282 |
return data;
|
| 1283 |
} |
| 1284 |
|
| 1285 |
static void vfio_ati_f10_quirk_write(void *opaque, hwaddr addr, |
| 1286 |
uint64_t data, unsigned size)
|
| 1287 |
{
|
| 1288 |
VFIOQuirk *quirk = opaque; |
| 1289 |
VFIODevice *vdev = quirk->vdev; |
| 1290 |
|
| 1291 |
vfio_bar_write(&vdev->bars[1], addr, data, size);
|
| 1292 |
|
| 1293 |
quirk->data = (addr == 0 && size == 4 && data == 0xf10) ? 1 : 0; |
| 1294 |
} |
| 1295 |
|
| 1296 |
static const MemoryRegionOps vfio_ati_f10_quirk = { |
| 1297 |
.read = vfio_ati_f10_quirk_read, |
| 1298 |
.write = vfio_ati_f10_quirk_write, |
| 1299 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1300 |
}; |
| 1301 |
|
| 1302 |
static void vfio_probe_ati_f10_quirk(VFIODevice *vdev, int nr) |
| 1303 |
{
|
| 1304 |
PCIDevice *pdev = &vdev->pdev; |
| 1305 |
off_t physoffset = vdev->config_offset + PCI_BASE_ADDRESS_0; |
| 1306 |
uint32_t physbar0; |
| 1307 |
uint64_t data; |
| 1308 |
VFIOQuirk *quirk; |
| 1309 |
|
| 1310 |
if (!vdev->has_vga || nr != 1 || !vdev->bars[0].size || |
| 1311 |
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
|
| 1312 |
return;
|
| 1313 |
} |
| 1314 |
|
| 1315 |
/* Get I/O port BAR physical address */
|
| 1316 |
if (pread(vdev->fd, &physbar0, 4, physoffset) != 4) { |
| 1317 |
error_report("vfio: probe failed for ATI/AMD 0xf10 quirk on device "
|
| 1318 |
"%04x:%02x:%02x.%x", vdev->host.domain,
|
| 1319 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 1320 |
return;
|
| 1321 |
} |
| 1322 |
|
| 1323 |
vfio_bar_write(&vdev->bars[1], 0, 0xf10, 4); |
| 1324 |
data = vfio_bar_read(&vdev->bars[1], 0x6, 2); |
| 1325 |
|
| 1326 |
/* If the register matches the physical address of BAR0, we need a quirk */
|
| 1327 |
if (data != (le32_to_cpu(physbar0) >> 16)) { |
| 1328 |
return;
|
| 1329 |
} |
| 1330 |
|
| 1331 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1332 |
quirk->vdev = vdev; |
| 1333 |
|
| 1334 |
memory_region_init_io(&quirk->mem, &vfio_ati_f10_quirk, quirk, |
| 1335 |
"vfio-ati-f10-quirk", 8); |
| 1336 |
memory_region_add_subregion_overlap(&vdev->bars[nr].mem, 0, &quirk->mem, 1); |
| 1337 |
|
| 1338 |
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); |
| 1339 |
|
| 1340 |
DPRINTF("Enabled ATI/AMD quirk 0xf10 for device %04x:%02x:%02x.%x\n",
|
| 1341 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1342 |
vdev->host.function); |
| 1343 |
} |
| 1344 |
|
| 1345 |
#define PCI_VENDOR_ID_NVIDIA 0x10de |
| 1346 |
|
| 1347 |
/*
|
| 1348 |
* Nvidia has several different methods to get to config space, the
|
| 1349 |
* nouveu project has several of these documented here:
|
| 1350 |
* https://github.com/pathscale/envytools/tree/master/hwdocs
|
| 1351 |
*
|
| 1352 |
* The first quirk is actually not documented in envytools and is found
|
| 1353 |
* on 10de:01d1 (NVIDIA Corporation G72 [GeForce 7300 LE]). This is an
|
| 1354 |
* NV46 chipset. The backdoor uses the legacy VGA I/O ports to access
|
| 1355 |
* the mirror of PCI config space found at BAR0 offset 0x1800. The access
|
| 1356 |
* sequence first writes 0x338 to I/O port 0x3d4. The target offset is
|
| 1357 |
* then written to 0x3d0. Finally 0x538 is written for a read and 0x738
|
| 1358 |
* is written for a write to 0x3d4. The BAR0 offset is then accessible
|
| 1359 |
* through 0x3d0. This quirk doesn't seem to be necessary on newer cards
|
| 1360 |
* that use the I/O port BAR5 window but it doesn't hurt to leave it.
|
| 1361 |
*/
|
| 1362 |
enum {
|
| 1363 |
NV_3D0_NONE, |
| 1364 |
NV_3D0_SELECT, |
| 1365 |
NV_3D0_WINDOW, |
| 1366 |
NV_3D0_READ, |
| 1367 |
NV_3D0_WRITE, |
| 1368 |
}; |
| 1369 |
|
| 1370 |
static uint64_t vfio_nvidia_3d0_quirk_read(void *opaque, |
| 1371 |
hwaddr addr, unsigned size)
|
| 1372 |
{
|
| 1373 |
VFIOQuirk *quirk = opaque; |
| 1374 |
VFIODevice *vdev = quirk->vdev; |
| 1375 |
PCIDevice *pdev = &vdev->pdev; |
| 1376 |
uint64_t data = vfio_vga_read(&vdev->vga.region[QEMU_PCI_VGA_IO_HI], |
| 1377 |
addr + 0x10, size);
|
| 1378 |
|
| 1379 |
if (quirk->data == NV_3D0_READ && addr == 0) { |
| 1380 |
data = vfio_pci_read_config(pdev, quirk->data2, size); |
| 1381 |
DPRINTF("%s(0x3d0, %d) = 0x%"PRIx64"\n", __func__, size, data); |
| 1382 |
} |
| 1383 |
|
| 1384 |
quirk->data = NV_3D0_NONE; |
| 1385 |
|
| 1386 |
return data;
|
| 1387 |
} |
| 1388 |
|
| 1389 |
static void vfio_nvidia_3d0_quirk_write(void *opaque, hwaddr addr, |
| 1390 |
uint64_t data, unsigned size)
|
| 1391 |
{
|
| 1392 |
VFIOQuirk *quirk = opaque; |
| 1393 |
VFIODevice *vdev = quirk->vdev; |
| 1394 |
PCIDevice *pdev = &vdev->pdev; |
| 1395 |
|
| 1396 |
switch (quirk->data) {
|
| 1397 |
case NV_3D0_NONE:
|
| 1398 |
if (addr == 4 && data == 0x338) { |
| 1399 |
quirk->data = NV_3D0_SELECT; |
| 1400 |
} |
| 1401 |
break;
|
| 1402 |
case NV_3D0_SELECT:
|
| 1403 |
quirk->data = NV_3D0_NONE; |
| 1404 |
if (addr == 0 && (data & ~0xff) == 0x1800) { |
| 1405 |
quirk->data = NV_3D0_WINDOW; |
| 1406 |
quirk->data2 = data & 0xff;
|
| 1407 |
} |
| 1408 |
break;
|
| 1409 |
case NV_3D0_WINDOW:
|
| 1410 |
quirk->data = NV_3D0_NONE; |
| 1411 |
if (addr == 4) { |
| 1412 |
if (data == 0x538) { |
| 1413 |
quirk->data = NV_3D0_READ; |
| 1414 |
} else if (data == 0x738) { |
| 1415 |
quirk->data = NV_3D0_WRITE; |
| 1416 |
} |
| 1417 |
} |
| 1418 |
break;
|
| 1419 |
case NV_3D0_WRITE:
|
| 1420 |
quirk->data = NV_3D0_NONE; |
| 1421 |
if (addr == 0) { |
| 1422 |
vfio_pci_write_config(pdev, quirk->data2, data, size); |
| 1423 |
DPRINTF("%s(0x3d0, 0x%"PRIx64", %d)\n", __func__, data, size); |
| 1424 |
return;
|
| 1425 |
} |
| 1426 |
break;
|
| 1427 |
default:
|
| 1428 |
quirk->data = NV_3D0_NONE; |
| 1429 |
} |
| 1430 |
|
| 1431 |
vfio_vga_write(&vdev->vga.region[QEMU_PCI_VGA_IO_HI], |
| 1432 |
addr + 0x10, data, size);
|
| 1433 |
} |
| 1434 |
|
| 1435 |
static const MemoryRegionOps vfio_nvidia_3d0_quirk = { |
| 1436 |
.read = vfio_nvidia_3d0_quirk_read, |
| 1437 |
.write = vfio_nvidia_3d0_quirk_write, |
| 1438 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1439 |
}; |
| 1440 |
|
| 1441 |
static void vfio_vga_probe_nvidia_3d0_quirk(VFIODevice *vdev) |
| 1442 |
{
|
| 1443 |
PCIDevice *pdev = &vdev->pdev; |
| 1444 |
VFIOQuirk *quirk; |
| 1445 |
|
| 1446 |
if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA ||
|
| 1447 |
!vdev->bars[1].size) {
|
| 1448 |
return;
|
| 1449 |
} |
| 1450 |
|
| 1451 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1452 |
quirk->vdev = vdev; |
| 1453 |
|
| 1454 |
memory_region_init_io(&quirk->mem, &vfio_nvidia_3d0_quirk, quirk, |
| 1455 |
"vfio-nvidia-3d0-quirk", 6); |
| 1456 |
memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem, |
| 1457 |
0x10, &quirk->mem);
|
| 1458 |
|
| 1459 |
QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks, |
| 1460 |
quirk, next); |
| 1461 |
|
| 1462 |
DPRINTF("Enabled NVIDIA VGA 0x3d0 quirk for device %04x:%02x:%02x.%x\n",
|
| 1463 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1464 |
vdev->host.function); |
| 1465 |
} |
| 1466 |
|
| 1467 |
/*
|
| 1468 |
* The second quirk is documented in envytools. The I/O port BAR5 is just
|
| 1469 |
* a set of address/data ports to the MMIO BARs. The BAR we care about is
|
| 1470 |
* again BAR0. This backdoor is apparently a bit newer than the one above
|
| 1471 |
* so we need to not only trap 256 bytes @0x1800, but all of PCI config
|
| 1472 |
* space, including extended space is available at the 4k @0x88000.
|
| 1473 |
*/
|
| 1474 |
enum {
|
| 1475 |
NV_BAR5_ADDRESS = 0x1,
|
| 1476 |
NV_BAR5_ENABLE = 0x2,
|
| 1477 |
NV_BAR5_MASTER = 0x4,
|
| 1478 |
NV_BAR5_VALID = 0x7,
|
| 1479 |
}; |
| 1480 |
|
| 1481 |
static uint64_t vfio_nvidia_bar5_window_quirk_read(void *opaque, |
| 1482 |
hwaddr addr, unsigned size)
|
| 1483 |
{
|
| 1484 |
VFIOQuirk *quirk = opaque; |
| 1485 |
VFIODevice *vdev = quirk->vdev; |
| 1486 |
uint64_t data = vfio_bar_read(&vdev->bars[5], addr, size);
|
| 1487 |
|
| 1488 |
if (addr == 0xc && quirk->data == NV_BAR5_VALID) { |
| 1489 |
data = vfio_pci_read_config(&vdev->pdev, quirk->data2, size); |
| 1490 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR5+0x%"HWADDR_PRIx", %d) = 0x%" |
| 1491 |
PRIx64"\n", __func__, vdev->host.domain, vdev->host.bus,
|
| 1492 |
vdev->host.slot, vdev->host.function, addr, size, data); |
| 1493 |
} |
| 1494 |
|
| 1495 |
return data;
|
| 1496 |
} |
| 1497 |
|
| 1498 |
static void vfio_nvidia_bar5_window_quirk_write(void *opaque, hwaddr addr, |
| 1499 |
uint64_t data, unsigned size)
|
| 1500 |
{
|
| 1501 |
VFIOQuirk *quirk = opaque; |
| 1502 |
VFIODevice *vdev = quirk->vdev; |
| 1503 |
|
| 1504 |
/*
|
| 1505 |
* Use quirk->data to track enables and quirk->data2 for the offset
|
| 1506 |
*/
|
| 1507 |
switch (addr) {
|
| 1508 |
case 0x0: |
| 1509 |
if (data & 0x1) { |
| 1510 |
quirk->data |= NV_BAR5_MASTER; |
| 1511 |
} else {
|
| 1512 |
quirk->data &= ~NV_BAR5_MASTER; |
| 1513 |
} |
| 1514 |
break;
|
| 1515 |
case 0x4: |
| 1516 |
if (data & 0x1) { |
| 1517 |
quirk->data |= NV_BAR5_ENABLE; |
| 1518 |
} else {
|
| 1519 |
quirk->data &= ~NV_BAR5_ENABLE; |
| 1520 |
} |
| 1521 |
break;
|
| 1522 |
case 0x8: |
| 1523 |
if (quirk->data & NV_BAR5_MASTER) {
|
| 1524 |
if ((data & ~0xfff) == 0x88000) { |
| 1525 |
quirk->data |= NV_BAR5_ADDRESS; |
| 1526 |
quirk->data2 = data & 0xfff;
|
| 1527 |
} else if ((data & ~0xff) == 0x1800) { |
| 1528 |
quirk->data |= NV_BAR5_ADDRESS; |
| 1529 |
quirk->data2 = data & 0xff;
|
| 1530 |
} else {
|
| 1531 |
quirk->data &= ~NV_BAR5_ADDRESS; |
| 1532 |
} |
| 1533 |
} |
| 1534 |
break;
|
| 1535 |
case 0xc: |
| 1536 |
if (quirk->data == NV_BAR5_VALID) {
|
| 1537 |
vfio_pci_write_config(&vdev->pdev, quirk->data2, data, size); |
| 1538 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR5+0x%"HWADDR_PRIx", 0x%" |
| 1539 |
PRIx64", %d)\n", __func__, vdev->host.domain,
|
| 1540 |
vdev->host.bus, vdev->host.slot, vdev->host.function, |
| 1541 |
addr, data, size); |
| 1542 |
return;
|
| 1543 |
} |
| 1544 |
} |
| 1545 |
|
| 1546 |
vfio_bar_write(&vdev->bars[5], addr, data, size);
|
| 1547 |
} |
| 1548 |
|
| 1549 |
static const MemoryRegionOps vfio_nvidia_bar5_window_quirk = { |
| 1550 |
.read = vfio_nvidia_bar5_window_quirk_read, |
| 1551 |
.write = vfio_nvidia_bar5_window_quirk_write, |
| 1552 |
.valid.min_access_size = 4,
|
| 1553 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1554 |
}; |
| 1555 |
|
| 1556 |
static void vfio_probe_nvidia_bar5_window_quirk(VFIODevice *vdev, int nr) |
| 1557 |
{
|
| 1558 |
PCIDevice *pdev = &vdev->pdev; |
| 1559 |
VFIOQuirk *quirk; |
| 1560 |
|
| 1561 |
if (!vdev->has_vga || nr != 5 || |
| 1562 |
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
|
| 1563 |
return;
|
| 1564 |
} |
| 1565 |
|
| 1566 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1567 |
quirk->vdev = vdev; |
| 1568 |
|
| 1569 |
memory_region_init_io(&quirk->mem, &vfio_nvidia_bar5_window_quirk, quirk, |
| 1570 |
"vfio-nvidia-bar5-window-quirk", 16); |
| 1571 |
memory_region_add_subregion_overlap(&vdev->bars[nr].mem, 0, &quirk->mem, 1); |
| 1572 |
|
| 1573 |
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); |
| 1574 |
|
| 1575 |
DPRINTF("Enabled NVIDIA BAR5 window quirk for device %04x:%02x:%02x.%x\n",
|
| 1576 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1577 |
vdev->host.function); |
| 1578 |
} |
| 1579 |
|
| 1580 |
/*
|
| 1581 |
* Finally, BAR0 itself. We want to redirect any accesses to either
|
| 1582 |
* 0x1800 or 0x88000 through the PCI config space access functions.
|
| 1583 |
*
|
| 1584 |
* NB - quirk at a page granularity or else they don't seem to work when
|
| 1585 |
* BARs are mmap'd
|
| 1586 |
*
|
| 1587 |
* Here's offset 0x88000...
|
| 1588 |
*/
|
| 1589 |
static uint64_t vfio_nvidia_bar0_88000_quirk_read(void *opaque, |
| 1590 |
hwaddr addr, unsigned size)
|
| 1591 |
{
|
| 1592 |
VFIOQuirk *quirk = opaque; |
| 1593 |
VFIODevice *vdev = quirk->vdev; |
| 1594 |
hwaddr base = 0x88000 & TARGET_PAGE_MASK;
|
| 1595 |
hwaddr offset = 0x88000 & ~TARGET_PAGE_MASK;
|
| 1596 |
uint64_t data = vfio_bar_read(&vdev->bars[0], addr + base, size);
|
| 1597 |
|
| 1598 |
if (ranges_overlap(addr, size, offset, PCI_CONFIG_SPACE_SIZE)) {
|
| 1599 |
data = vfio_pci_read_config(&vdev->pdev, addr - offset, size); |
| 1600 |
|
| 1601 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR0+0x%"HWADDR_PRIx", %d) = 0x%" |
| 1602 |
PRIx64"\n", __func__, vdev->host.domain, vdev->host.bus,
|
| 1603 |
vdev->host.slot, vdev->host.function, addr + base, size, data); |
| 1604 |
} |
| 1605 |
|
| 1606 |
return data;
|
| 1607 |
} |
| 1608 |
|
| 1609 |
static void vfio_nvidia_bar0_88000_quirk_write(void *opaque, hwaddr addr, |
| 1610 |
uint64_t data, unsigned size)
|
| 1611 |
{
|
| 1612 |
VFIOQuirk *quirk = opaque; |
| 1613 |
VFIODevice *vdev = quirk->vdev; |
| 1614 |
hwaddr base = 0x88000 & TARGET_PAGE_MASK;
|
| 1615 |
hwaddr offset = 0x88000 & ~TARGET_PAGE_MASK;
|
| 1616 |
|
| 1617 |
if (ranges_overlap(addr, size, offset, PCI_CONFIG_SPACE_SIZE)) {
|
| 1618 |
vfio_pci_write_config(&vdev->pdev, addr - offset, data, size); |
| 1619 |
|
| 1620 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR0+0x%"HWADDR_PRIx", 0x%" |
| 1621 |
PRIx64", %d)\n", __func__, vdev->host.domain, vdev->host.bus,
|
| 1622 |
vdev->host.slot, vdev->host.function, addr + base, data, size); |
| 1623 |
} else {
|
| 1624 |
vfio_bar_write(&vdev->bars[0], addr + base, data, size);
|
| 1625 |
} |
| 1626 |
} |
| 1627 |
|
| 1628 |
static const MemoryRegionOps vfio_nvidia_bar0_88000_quirk = { |
| 1629 |
.read = vfio_nvidia_bar0_88000_quirk_read, |
| 1630 |
.write = vfio_nvidia_bar0_88000_quirk_write, |
| 1631 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1632 |
}; |
| 1633 |
|
| 1634 |
static void vfio_probe_nvidia_bar0_88000_quirk(VFIODevice *vdev, int nr) |
| 1635 |
{
|
| 1636 |
PCIDevice *pdev = &vdev->pdev; |
| 1637 |
VFIOQuirk *quirk; |
| 1638 |
|
| 1639 |
if (!vdev->has_vga || nr != 0 || |
| 1640 |
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
|
| 1641 |
return;
|
| 1642 |
} |
| 1643 |
|
| 1644 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1645 |
quirk->vdev = vdev; |
| 1646 |
|
| 1647 |
memory_region_init_io(&quirk->mem, &vfio_nvidia_bar0_88000_quirk, quirk, |
| 1648 |
"vfio-nvidia-bar0-88000-quirk",
|
| 1649 |
TARGET_PAGE_ALIGN(PCIE_CONFIG_SPACE_SIZE)); |
| 1650 |
memory_region_add_subregion_overlap(&vdev->bars[nr].mem, |
| 1651 |
0x88000 & TARGET_PAGE_MASK,
|
| 1652 |
&quirk->mem, 1);
|
| 1653 |
|
| 1654 |
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); |
| 1655 |
|
| 1656 |
DPRINTF("Enabled NVIDIA BAR0 0x88000 quirk for device %04x:%02x:%02x.%x\n",
|
| 1657 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1658 |
vdev->host.function); |
| 1659 |
} |
| 1660 |
|
| 1661 |
/*
|
| 1662 |
* And here's the same for BAR0 offset 0x1800...
|
| 1663 |
*/
|
| 1664 |
static uint64_t vfio_nvidia_bar0_1800_quirk_read(void *opaque, |
| 1665 |
hwaddr addr, unsigned size)
|
| 1666 |
{
|
| 1667 |
VFIOQuirk *quirk = opaque; |
| 1668 |
VFIODevice *vdev = quirk->vdev; |
| 1669 |
hwaddr base = 0x1800 & TARGET_PAGE_MASK;
|
| 1670 |
hwaddr offset = 0x1800 & ~TARGET_PAGE_MASK;
|
| 1671 |
uint64_t data = vfio_bar_read(&vdev->bars[0], addr + base, size);
|
| 1672 |
|
| 1673 |
if (ranges_overlap(addr, size, offset, PCI_CONFIG_SPACE_SIZE)) {
|
| 1674 |
data = vfio_pci_read_config(&vdev->pdev, addr - offset, size); |
| 1675 |
|
| 1676 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR0+0x%"HWADDR_PRIx", %d) = 0x%" |
| 1677 |
PRIx64"\n", __func__, vdev->host.domain, vdev->host.bus,
|
| 1678 |
vdev->host.slot, vdev->host.function, addr + base, size, data); |
| 1679 |
} |
| 1680 |
|
| 1681 |
return data;
|
| 1682 |
} |
| 1683 |
|
| 1684 |
static void vfio_nvidia_bar0_1800_quirk_write(void *opaque, hwaddr addr, |
| 1685 |
uint64_t data, unsigned size)
|
| 1686 |
{
|
| 1687 |
VFIOQuirk *quirk = opaque; |
| 1688 |
VFIODevice *vdev = quirk->vdev; |
| 1689 |
hwaddr base = 0x1800 & TARGET_PAGE_MASK;
|
| 1690 |
hwaddr offset = 0x1800 & ~TARGET_PAGE_MASK;
|
| 1691 |
|
| 1692 |
if (ranges_overlap(addr, size, offset, PCI_CONFIG_SPACE_SIZE)) {
|
| 1693 |
vfio_pci_write_config(&vdev->pdev, addr - offset, data, size); |
| 1694 |
|
| 1695 |
DPRINTF("%s(%04x:%02x:%02x.%x:BAR0+0x%"HWADDR_PRIx", 0x%" |
| 1696 |
PRIx64", %d)\n", __func__, vdev->host.domain, vdev->host.bus,
|
| 1697 |
vdev->host.slot, vdev->host.function, addr + base, data, size); |
| 1698 |
} else {
|
| 1699 |
vfio_bar_write(&vdev->bars[0], addr + base, data, size);
|
| 1700 |
} |
| 1701 |
} |
| 1702 |
|
| 1703 |
static const MemoryRegionOps vfio_nvidia_bar0_1800_quirk = { |
| 1704 |
.read = vfio_nvidia_bar0_1800_quirk_read, |
| 1705 |
.write = vfio_nvidia_bar0_1800_quirk_write, |
| 1706 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 1707 |
}; |
| 1708 |
|
| 1709 |
static void vfio_probe_nvidia_bar0_1800_quirk(VFIODevice *vdev, int nr) |
| 1710 |
{
|
| 1711 |
PCIDevice *pdev = &vdev->pdev; |
| 1712 |
VFIOQuirk *quirk; |
| 1713 |
|
| 1714 |
if (!vdev->has_vga || nr != 0 || |
| 1715 |
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
|
| 1716 |
return;
|
| 1717 |
} |
| 1718 |
|
| 1719 |
/* Log the chipset ID */
|
| 1720 |
DPRINTF("Nvidia NV%02x\n",
|
| 1721 |
(unsigned int)(vfio_bar_read(&vdev->bars[0], 0, 4) >> 20) & 0xff); |
| 1722 |
|
| 1723 |
quirk = g_malloc0(sizeof(*quirk));
|
| 1724 |
quirk->vdev = vdev; |
| 1725 |
|
| 1726 |
memory_region_init_io(&quirk->mem, &vfio_nvidia_bar0_1800_quirk, quirk, |
| 1727 |
"vfio-nvidia-bar0-1800-quirk",
|
| 1728 |
TARGET_PAGE_ALIGN(PCI_CONFIG_SPACE_SIZE)); |
| 1729 |
memory_region_add_subregion_overlap(&vdev->bars[nr].mem, |
| 1730 |
0x1800 & TARGET_PAGE_MASK,
|
| 1731 |
&quirk->mem, 1);
|
| 1732 |
|
| 1733 |
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); |
| 1734 |
|
| 1735 |
DPRINTF("Enabled NVIDIA BAR0 0x1800 quirk for device %04x:%02x:%02x.%x\n",
|
| 1736 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1737 |
vdev->host.function); |
| 1738 |
} |
| 1739 |
|
| 1740 |
/*
|
| 1741 |
* TODO - Some Nvidia devices provide config access to their companion HDA
|
| 1742 |
* device and even to their parent bridge via these config space mirrors.
|
| 1743 |
* Add quirks for those regions.
|
| 1744 |
*/
|
| 1745 |
|
| 1746 |
/*
|
| 1747 |
* Common quirk probe entry points.
|
| 1748 |
*/
|
| 1749 |
static void vfio_vga_quirk_setup(VFIODevice *vdev) |
| 1750 |
{
|
| 1751 |
vfio_vga_probe_ati_3c3_quirk(vdev); |
| 1752 |
vfio_vga_probe_nvidia_3d0_quirk(vdev); |
| 1753 |
} |
| 1754 |
|
| 1755 |
static void vfio_vga_quirk_teardown(VFIODevice *vdev) |
| 1756 |
{
|
| 1757 |
int i;
|
| 1758 |
|
| 1759 |
for (i = 0; i < ARRAY_SIZE(vdev->vga.region); i++) { |
| 1760 |
while (!QLIST_EMPTY(&vdev->vga.region[i].quirks)) {
|
| 1761 |
VFIOQuirk *quirk = QLIST_FIRST(&vdev->vga.region[i].quirks); |
| 1762 |
memory_region_del_subregion(&vdev->vga.region[i].mem, &quirk->mem); |
| 1763 |
QLIST_REMOVE(quirk, next); |
| 1764 |
g_free(quirk); |
| 1765 |
} |
| 1766 |
} |
| 1767 |
} |
| 1768 |
|
| 1769 |
static void vfio_bar_quirk_setup(VFIODevice *vdev, int nr) |
| 1770 |
{
|
| 1771 |
vfio_probe_ati_4010_quirk(vdev, nr); |
| 1772 |
vfio_probe_ati_f10_quirk(vdev, nr); |
| 1773 |
vfio_probe_nvidia_bar5_window_quirk(vdev, nr); |
| 1774 |
vfio_probe_nvidia_bar0_88000_quirk(vdev, nr); |
| 1775 |
vfio_probe_nvidia_bar0_1800_quirk(vdev, nr); |
| 1776 |
} |
| 1777 |
|
| 1778 |
static void vfio_bar_quirk_teardown(VFIODevice *vdev, int nr) |
| 1779 |
{
|
| 1780 |
VFIOBAR *bar = &vdev->bars[nr]; |
| 1781 |
|
| 1782 |
while (!QLIST_EMPTY(&bar->quirks)) {
|
| 1783 |
VFIOQuirk *quirk = QLIST_FIRST(&bar->quirks); |
| 1784 |
memory_region_del_subregion(&bar->mem, &quirk->mem); |
| 1785 |
QLIST_REMOVE(quirk, next); |
| 1786 |
g_free(quirk); |
| 1787 |
} |
| 1788 |
} |
| 1789 |
|
| 1790 |
/*
|
| 1791 |
* PCI config space
|
| 1792 |
*/
|
| 1793 |
static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len) |
| 1794 |
{
|
| 1795 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 1796 |
uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val; |
| 1797 |
|
| 1798 |
memcpy(&emu_bits, vdev->emulated_config_bits + addr, len); |
| 1799 |
emu_bits = le32_to_cpu(emu_bits); |
| 1800 |
|
| 1801 |
if (emu_bits) {
|
| 1802 |
emu_val = pci_default_read_config(pdev, addr, len); |
| 1803 |
} |
| 1804 |
|
| 1805 |
if (~emu_bits & (0xffffffffU >> (32 - len * 8))) { |
| 1806 |
ssize_t ret; |
| 1807 |
|
| 1808 |
ret = pread(vdev->fd, &phys_val, len, vdev->config_offset + addr); |
| 1809 |
if (ret != len) {
|
| 1810 |
error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x) failed: %m",
|
| 1811 |
__func__, vdev->host.domain, vdev->host.bus, |
| 1812 |
vdev->host.slot, vdev->host.function, addr, len); |
| 1813 |
return -errno;
|
| 1814 |
} |
| 1815 |
phys_val = le32_to_cpu(phys_val); |
| 1816 |
} |
| 1817 |
|
| 1818 |
val = (emu_val & emu_bits) | (phys_val & ~emu_bits); |
| 1819 |
|
| 1820 |
DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, len=0x%x) %x\n", __func__,
|
| 1821 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1822 |
vdev->host.function, addr, len, val); |
| 1823 |
|
| 1824 |
return val;
|
| 1825 |
} |
| 1826 |
|
| 1827 |
static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr, |
| 1828 |
uint32_t val, int len)
|
| 1829 |
{
|
| 1830 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 1831 |
uint32_t val_le = cpu_to_le32(val); |
| 1832 |
|
| 1833 |
DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, 0x%x, len=0x%x)\n", __func__,
|
| 1834 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 1835 |
vdev->host.function, addr, val, len); |
| 1836 |
|
| 1837 |
/* Write everything to VFIO, let it filter out what we can't write */
|
| 1838 |
if (pwrite(vdev->fd, &val_le, len, vdev->config_offset + addr) != len) {
|
| 1839 |
error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x, 0x%x) failed: %m",
|
| 1840 |
__func__, vdev->host.domain, vdev->host.bus, |
| 1841 |
vdev->host.slot, vdev->host.function, addr, val, len); |
| 1842 |
} |
| 1843 |
|
| 1844 |
/* MSI/MSI-X Enabling/Disabling */
|
| 1845 |
if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
|
| 1846 |
ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
|
| 1847 |
int is_enabled, was_enabled = msi_enabled(pdev);
|
| 1848 |
|
| 1849 |
pci_default_write_config(pdev, addr, val, len); |
| 1850 |
|
| 1851 |
is_enabled = msi_enabled(pdev); |
| 1852 |
|
| 1853 |
if (!was_enabled && is_enabled) {
|
| 1854 |
vfio_enable_msi(vdev); |
| 1855 |
} else if (was_enabled && !is_enabled) { |
| 1856 |
vfio_disable_msi(vdev); |
| 1857 |
} |
| 1858 |
} else if (pdev->cap_present & QEMU_PCI_CAP_MSIX && |
| 1859 |
ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
|
| 1860 |
int is_enabled, was_enabled = msix_enabled(pdev);
|
| 1861 |
|
| 1862 |
pci_default_write_config(pdev, addr, val, len); |
| 1863 |
|
| 1864 |
is_enabled = msix_enabled(pdev); |
| 1865 |
|
| 1866 |
if (!was_enabled && is_enabled) {
|
| 1867 |
vfio_enable_msix(vdev); |
| 1868 |
} else if (was_enabled && !is_enabled) { |
| 1869 |
vfio_disable_msix(vdev); |
| 1870 |
} |
| 1871 |
} else {
|
| 1872 |
/* Write everything to QEMU to keep emulated bits correct */
|
| 1873 |
pci_default_write_config(pdev, addr, val, len); |
| 1874 |
} |
| 1875 |
} |
| 1876 |
|
| 1877 |
/*
|
| 1878 |
* DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
|
| 1879 |
*/
|
| 1880 |
static int vfio_dma_unmap(VFIOContainer *container, |
| 1881 |
hwaddr iova, ram_addr_t size) |
| 1882 |
{
|
| 1883 |
struct vfio_iommu_type1_dma_unmap unmap = {
|
| 1884 |
.argsz = sizeof(unmap),
|
| 1885 |
.flags = 0,
|
| 1886 |
.iova = iova, |
| 1887 |
.size = size, |
| 1888 |
}; |
| 1889 |
|
| 1890 |
if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
|
| 1891 |
DPRINTF("VFIO_UNMAP_DMA: %d\n", -errno);
|
| 1892 |
return -errno;
|
| 1893 |
} |
| 1894 |
|
| 1895 |
return 0; |
| 1896 |
} |
| 1897 |
|
| 1898 |
static int vfio_dma_map(VFIOContainer *container, hwaddr iova, |
| 1899 |
ram_addr_t size, void *vaddr, bool readonly) |
| 1900 |
{
|
| 1901 |
struct vfio_iommu_type1_dma_map map = {
|
| 1902 |
.argsz = sizeof(map),
|
| 1903 |
.flags = VFIO_DMA_MAP_FLAG_READ, |
| 1904 |
.vaddr = (__u64)(uintptr_t)vaddr, |
| 1905 |
.iova = iova, |
| 1906 |
.size = size, |
| 1907 |
}; |
| 1908 |
|
| 1909 |
if (!readonly) {
|
| 1910 |
map.flags |= VFIO_DMA_MAP_FLAG_WRITE; |
| 1911 |
} |
| 1912 |
|
| 1913 |
/*
|
| 1914 |
* Try the mapping, if it fails with EBUSY, unmap the region and try
|
| 1915 |
* again. This shouldn't be necessary, but we sometimes see it in
|
| 1916 |
* the the VGA ROM space.
|
| 1917 |
*/
|
| 1918 |
if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 || |
| 1919 |
(errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
|
| 1920 |
ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
|
| 1921 |
return 0; |
| 1922 |
} |
| 1923 |
|
| 1924 |
DPRINTF("VFIO_MAP_DMA: %d\n", -errno);
|
| 1925 |
return -errno;
|
| 1926 |
} |
| 1927 |
|
| 1928 |
static bool vfio_listener_skipped_section(MemoryRegionSection *section) |
| 1929 |
{
|
| 1930 |
return !memory_region_is_ram(section->mr);
|
| 1931 |
} |
| 1932 |
|
| 1933 |
static void vfio_listener_region_add(MemoryListener *listener, |
| 1934 |
MemoryRegionSection *section) |
| 1935 |
{
|
| 1936 |
VFIOContainer *container = container_of(listener, VFIOContainer, |
| 1937 |
iommu_data.listener); |
| 1938 |
hwaddr iova, end; |
| 1939 |
void *vaddr;
|
| 1940 |
int ret;
|
| 1941 |
|
| 1942 |
if (vfio_listener_skipped_section(section)) {
|
| 1943 |
DPRINTF("SKIPPING region_add %"HWADDR_PRIx" - %"PRIx64"\n", |
| 1944 |
section->offset_within_address_space, |
| 1945 |
section->offset_within_address_space + section->size - 1);
|
| 1946 |
return;
|
| 1947 |
} |
| 1948 |
|
| 1949 |
if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
|
| 1950 |
(section->offset_within_region & ~TARGET_PAGE_MASK))) {
|
| 1951 |
error_report("%s received unaligned region", __func__);
|
| 1952 |
return;
|
| 1953 |
} |
| 1954 |
|
| 1955 |
iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); |
| 1956 |
end = (section->offset_within_address_space + section->size) & |
| 1957 |
TARGET_PAGE_MASK; |
| 1958 |
|
| 1959 |
if (iova >= end) {
|
| 1960 |
return;
|
| 1961 |
} |
| 1962 |
|
| 1963 |
vaddr = memory_region_get_ram_ptr(section->mr) + |
| 1964 |
section->offset_within_region + |
| 1965 |
(iova - section->offset_within_address_space); |
| 1966 |
|
| 1967 |
DPRINTF("region_add %"HWADDR_PRIx" - %"HWADDR_PRIx" [%p]\n", |
| 1968 |
iova, end - 1, vaddr);
|
| 1969 |
|
| 1970 |
ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly); |
| 1971 |
if (ret) {
|
| 1972 |
error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " |
| 1973 |
"0x%"HWADDR_PRIx", %p) = %d (%m)", |
| 1974 |
container, iova, end - iova, vaddr, ret); |
| 1975 |
} |
| 1976 |
} |
| 1977 |
|
| 1978 |
static void vfio_listener_region_del(MemoryListener *listener, |
| 1979 |
MemoryRegionSection *section) |
| 1980 |
{
|
| 1981 |
VFIOContainer *container = container_of(listener, VFIOContainer, |
| 1982 |
iommu_data.listener); |
| 1983 |
hwaddr iova, end; |
| 1984 |
int ret;
|
| 1985 |
|
| 1986 |
if (vfio_listener_skipped_section(section)) {
|
| 1987 |
DPRINTF("SKIPPING region_del %"HWADDR_PRIx" - %"PRIx64"\n", |
| 1988 |
section->offset_within_address_space, |
| 1989 |
section->offset_within_address_space + section->size - 1);
|
| 1990 |
return;
|
| 1991 |
} |
| 1992 |
|
| 1993 |
if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
|
| 1994 |
(section->offset_within_region & ~TARGET_PAGE_MASK))) {
|
| 1995 |
error_report("%s received unaligned region", __func__);
|
| 1996 |
return;
|
| 1997 |
} |
| 1998 |
|
| 1999 |
iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); |
| 2000 |
end = (section->offset_within_address_space + section->size) & |
| 2001 |
TARGET_PAGE_MASK; |
| 2002 |
|
| 2003 |
if (iova >= end) {
|
| 2004 |
return;
|
| 2005 |
} |
| 2006 |
|
| 2007 |
DPRINTF("region_del %"HWADDR_PRIx" - %"HWADDR_PRIx"\n", |
| 2008 |
iova, end - 1);
|
| 2009 |
|
| 2010 |
ret = vfio_dma_unmap(container, iova, end - iova); |
| 2011 |
if (ret) {
|
| 2012 |
error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " |
| 2013 |
"0x%"HWADDR_PRIx") = %d (%m)", |
| 2014 |
container, iova, end - iova, ret); |
| 2015 |
} |
| 2016 |
} |
| 2017 |
|
| 2018 |
static MemoryListener vfio_memory_listener = {
|
| 2019 |
.region_add = vfio_listener_region_add, |
| 2020 |
.region_del = vfio_listener_region_del, |
| 2021 |
}; |
| 2022 |
|
| 2023 |
static void vfio_listener_release(VFIOContainer *container) |
| 2024 |
{
|
| 2025 |
memory_listener_unregister(&container->iommu_data.listener); |
| 2026 |
} |
| 2027 |
|
| 2028 |
/*
|
| 2029 |
* Interrupt setup
|
| 2030 |
*/
|
| 2031 |
static void vfio_disable_interrupts(VFIODevice *vdev) |
| 2032 |
{
|
| 2033 |
switch (vdev->interrupt) {
|
| 2034 |
case VFIO_INT_INTx:
|
| 2035 |
vfio_disable_intx(vdev); |
| 2036 |
break;
|
| 2037 |
case VFIO_INT_MSI:
|
| 2038 |
vfio_disable_msi(vdev); |
| 2039 |
break;
|
| 2040 |
case VFIO_INT_MSIX:
|
| 2041 |
vfio_disable_msix(vdev); |
| 2042 |
break;
|
| 2043 |
} |
| 2044 |
} |
| 2045 |
|
| 2046 |
static int vfio_setup_msi(VFIODevice *vdev, int pos) |
| 2047 |
{
|
| 2048 |
uint16_t ctrl; |
| 2049 |
bool msi_64bit, msi_maskbit;
|
| 2050 |
int ret, entries;
|
| 2051 |
|
| 2052 |
if (pread(vdev->fd, &ctrl, sizeof(ctrl), |
| 2053 |
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
| 2054 |
return -errno;
|
| 2055 |
} |
| 2056 |
ctrl = le16_to_cpu(ctrl); |
| 2057 |
|
| 2058 |
msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT); |
| 2059 |
msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT); |
| 2060 |
entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1); |
| 2061 |
|
| 2062 |
DPRINTF("%04x:%02x:%02x.%x PCI MSI CAP @0x%x\n", vdev->host.domain,
|
| 2063 |
vdev->host.bus, vdev->host.slot, vdev->host.function, pos); |
| 2064 |
|
| 2065 |
ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit); |
| 2066 |
if (ret < 0) { |
| 2067 |
if (ret == -ENOTSUP) {
|
| 2068 |
return 0; |
| 2069 |
} |
| 2070 |
error_report("vfio: msi_init failed");
|
| 2071 |
return ret;
|
| 2072 |
} |
| 2073 |
vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0); |
| 2074 |
|
| 2075 |
return 0; |
| 2076 |
} |
| 2077 |
|
| 2078 |
/*
|
| 2079 |
* We don't have any control over how pci_add_capability() inserts
|
| 2080 |
* capabilities into the chain. In order to setup MSI-X we need a
|
| 2081 |
* MemoryRegion for the BAR. In order to setup the BAR and not
|
| 2082 |
* attempt to mmap the MSI-X table area, which VFIO won't allow, we
|
| 2083 |
* need to first look for where the MSI-X table lives. So we
|
| 2084 |
* unfortunately split MSI-X setup across two functions.
|
| 2085 |
*/
|
| 2086 |
static int vfio_early_setup_msix(VFIODevice *vdev) |
| 2087 |
{
|
| 2088 |
uint8_t pos; |
| 2089 |
uint16_t ctrl; |
| 2090 |
uint32_t table, pba; |
| 2091 |
|
| 2092 |
pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX); |
| 2093 |
if (!pos) {
|
| 2094 |
return 0; |
| 2095 |
} |
| 2096 |
|
| 2097 |
if (pread(vdev->fd, &ctrl, sizeof(ctrl), |
| 2098 |
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
| 2099 |
return -errno;
|
| 2100 |
} |
| 2101 |
|
| 2102 |
if (pread(vdev->fd, &table, sizeof(table), |
| 2103 |
vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
|
| 2104 |
return -errno;
|
| 2105 |
} |
| 2106 |
|
| 2107 |
if (pread(vdev->fd, &pba, sizeof(pba), |
| 2108 |
vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
|
| 2109 |
return -errno;
|
| 2110 |
} |
| 2111 |
|
| 2112 |
ctrl = le16_to_cpu(ctrl); |
| 2113 |
table = le32_to_cpu(table); |
| 2114 |
pba = le32_to_cpu(pba); |
| 2115 |
|
| 2116 |
vdev->msix = g_malloc0(sizeof(*(vdev->msix)));
|
| 2117 |
vdev->msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK; |
| 2118 |
vdev->msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; |
| 2119 |
vdev->msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; |
| 2120 |
vdev->msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; |
| 2121 |
vdev->msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
|
| 2122 |
|
| 2123 |
DPRINTF("%04x:%02x:%02x.%x "
|
| 2124 |
"PCI MSI-X CAP @0x%x, BAR %d, offset 0x%x, entries %d\n",
|
| 2125 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 2126 |
vdev->host.function, pos, vdev->msix->table_bar, |
| 2127 |
vdev->msix->table_offset, vdev->msix->entries); |
| 2128 |
|
| 2129 |
return 0; |
| 2130 |
} |
| 2131 |
|
| 2132 |
static int vfio_setup_msix(VFIODevice *vdev, int pos) |
| 2133 |
{
|
| 2134 |
int ret;
|
| 2135 |
|
| 2136 |
ret = msix_init(&vdev->pdev, vdev->msix->entries, |
| 2137 |
&vdev->bars[vdev->msix->table_bar].mem, |
| 2138 |
vdev->msix->table_bar, vdev->msix->table_offset, |
| 2139 |
&vdev->bars[vdev->msix->pba_bar].mem, |
| 2140 |
vdev->msix->pba_bar, vdev->msix->pba_offset, pos); |
| 2141 |
if (ret < 0) { |
| 2142 |
if (ret == -ENOTSUP) {
|
| 2143 |
return 0; |
| 2144 |
} |
| 2145 |
error_report("vfio: msix_init failed");
|
| 2146 |
return ret;
|
| 2147 |
} |
| 2148 |
|
| 2149 |
return 0; |
| 2150 |
} |
| 2151 |
|
| 2152 |
static void vfio_teardown_msi(VFIODevice *vdev) |
| 2153 |
{
|
| 2154 |
msi_uninit(&vdev->pdev); |
| 2155 |
|
| 2156 |
if (vdev->msix) {
|
| 2157 |
msix_uninit(&vdev->pdev, &vdev->bars[vdev->msix->table_bar].mem, |
| 2158 |
&vdev->bars[vdev->msix->pba_bar].mem); |
| 2159 |
} |
| 2160 |
} |
| 2161 |
|
| 2162 |
/*
|
| 2163 |
* Resource setup
|
| 2164 |
*/
|
| 2165 |
static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled) |
| 2166 |
{
|
| 2167 |
int i;
|
| 2168 |
|
| 2169 |
for (i = 0; i < PCI_ROM_SLOT; i++) { |
| 2170 |
VFIOBAR *bar = &vdev->bars[i]; |
| 2171 |
|
| 2172 |
if (!bar->size) {
|
| 2173 |
continue;
|
| 2174 |
} |
| 2175 |
|
| 2176 |
memory_region_set_enabled(&bar->mmap_mem, enabled); |
| 2177 |
if (vdev->msix && vdev->msix->table_bar == i) {
|
| 2178 |
memory_region_set_enabled(&vdev->msix->mmap_mem, enabled); |
| 2179 |
} |
| 2180 |
} |
| 2181 |
} |
| 2182 |
|
| 2183 |
static void vfio_unmap_bar(VFIODevice *vdev, int nr) |
| 2184 |
{
|
| 2185 |
VFIOBAR *bar = &vdev->bars[nr]; |
| 2186 |
|
| 2187 |
if (!bar->size) {
|
| 2188 |
return;
|
| 2189 |
} |
| 2190 |
|
| 2191 |
vfio_bar_quirk_teardown(vdev, nr); |
| 2192 |
|
| 2193 |
memory_region_del_subregion(&bar->mem, &bar->mmap_mem); |
| 2194 |
munmap(bar->mmap, memory_region_size(&bar->mmap_mem)); |
| 2195 |
|
| 2196 |
if (vdev->msix && vdev->msix->table_bar == nr) {
|
| 2197 |
memory_region_del_subregion(&bar->mem, &vdev->msix->mmap_mem); |
| 2198 |
munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem)); |
| 2199 |
} |
| 2200 |
|
| 2201 |
memory_region_destroy(&bar->mem); |
| 2202 |
} |
| 2203 |
|
| 2204 |
static int vfio_mmap_bar(VFIOBAR *bar, MemoryRegion *mem, MemoryRegion *submem, |
| 2205 |
void **map, size_t size, off_t offset,
|
| 2206 |
const char *name) |
| 2207 |
{
|
| 2208 |
int ret = 0; |
| 2209 |
|
| 2210 |
if (VFIO_ALLOW_MMAP && size && bar->flags & VFIO_REGION_INFO_FLAG_MMAP) {
|
| 2211 |
int prot = 0; |
| 2212 |
|
| 2213 |
if (bar->flags & VFIO_REGION_INFO_FLAG_READ) {
|
| 2214 |
prot |= PROT_READ; |
| 2215 |
} |
| 2216 |
|
| 2217 |
if (bar->flags & VFIO_REGION_INFO_FLAG_WRITE) {
|
| 2218 |
prot |= PROT_WRITE; |
| 2219 |
} |
| 2220 |
|
| 2221 |
*map = mmap(NULL, size, prot, MAP_SHARED,
|
| 2222 |
bar->fd, bar->fd_offset + offset); |
| 2223 |
if (*map == MAP_FAILED) {
|
| 2224 |
*map = NULL;
|
| 2225 |
ret = -errno; |
| 2226 |
goto empty_region;
|
| 2227 |
} |
| 2228 |
|
| 2229 |
memory_region_init_ram_ptr(submem, name, size, *map); |
| 2230 |
} else {
|
| 2231 |
empty_region:
|
| 2232 |
/* Create a zero sized sub-region to make cleanup easy. */
|
| 2233 |
memory_region_init(submem, name, 0);
|
| 2234 |
} |
| 2235 |
|
| 2236 |
memory_region_add_subregion(mem, offset, submem); |
| 2237 |
|
| 2238 |
return ret;
|
| 2239 |
} |
| 2240 |
|
| 2241 |
static void vfio_map_bar(VFIODevice *vdev, int nr) |
| 2242 |
{
|
| 2243 |
VFIOBAR *bar = &vdev->bars[nr]; |
| 2244 |
unsigned size = bar->size;
|
| 2245 |
char name[64]; |
| 2246 |
uint32_t pci_bar; |
| 2247 |
uint8_t type; |
| 2248 |
int ret;
|
| 2249 |
|
| 2250 |
/* Skip both unimplemented BARs and the upper half of 64bit BARS. */
|
| 2251 |
if (!size) {
|
| 2252 |
return;
|
| 2253 |
} |
| 2254 |
|
| 2255 |
snprintf(name, sizeof(name), "VFIO %04x:%02x:%02x.%x BAR %d", |
| 2256 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 2257 |
vdev->host.function, nr); |
| 2258 |
|
| 2259 |
/* Determine what type of BAR this is for registration */
|
| 2260 |
ret = pread(vdev->fd, &pci_bar, sizeof(pci_bar),
|
| 2261 |
vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
|
| 2262 |
if (ret != sizeof(pci_bar)) { |
| 2263 |
error_report("vfio: Failed to read BAR %d (%m)", nr);
|
| 2264 |
return;
|
| 2265 |
} |
| 2266 |
|
| 2267 |
pci_bar = le32_to_cpu(pci_bar); |
| 2268 |
type = pci_bar & (pci_bar & PCI_BASE_ADDRESS_SPACE_IO ? |
| 2269 |
~PCI_BASE_ADDRESS_IO_MASK : ~PCI_BASE_ADDRESS_MEM_MASK); |
| 2270 |
|
| 2271 |
/* A "slow" read/write mapping underlies all BARs */
|
| 2272 |
memory_region_init_io(&bar->mem, &vfio_bar_ops, bar, name, size); |
| 2273 |
pci_register_bar(&vdev->pdev, nr, type, &bar->mem); |
| 2274 |
|
| 2275 |
/*
|
| 2276 |
* We can't mmap areas overlapping the MSIX vector table, so we
|
| 2277 |
* potentially insert a direct-mapped subregion before and after it.
|
| 2278 |
*/
|
| 2279 |
if (vdev->msix && vdev->msix->table_bar == nr) {
|
| 2280 |
size = vdev->msix->table_offset & TARGET_PAGE_MASK; |
| 2281 |
} |
| 2282 |
|
| 2283 |
strncat(name, " mmap", sizeof(name) - strlen(name) - 1); |
| 2284 |
if (vfio_mmap_bar(bar, &bar->mem,
|
| 2285 |
&bar->mmap_mem, &bar->mmap, size, 0, name)) {
|
| 2286 |
error_report("%s unsupported. Performance may be slow", name);
|
| 2287 |
} |
| 2288 |
|
| 2289 |
if (vdev->msix && vdev->msix->table_bar == nr) {
|
| 2290 |
unsigned start;
|
| 2291 |
|
| 2292 |
start = TARGET_PAGE_ALIGN(vdev->msix->table_offset + |
| 2293 |
(vdev->msix->entries * PCI_MSIX_ENTRY_SIZE)); |
| 2294 |
|
| 2295 |
size = start < bar->size ? bar->size - start : 0;
|
| 2296 |
strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1); |
| 2297 |
/* VFIOMSIXInfo contains another MemoryRegion for this mapping */
|
| 2298 |
if (vfio_mmap_bar(bar, &bar->mem, &vdev->msix->mmap_mem,
|
| 2299 |
&vdev->msix->mmap, size, start, name)) {
|
| 2300 |
error_report("%s unsupported. Performance may be slow", name);
|
| 2301 |
} |
| 2302 |
} |
| 2303 |
|
| 2304 |
vfio_bar_quirk_setup(vdev, nr); |
| 2305 |
} |
| 2306 |
|
| 2307 |
static void vfio_map_bars(VFIODevice *vdev) |
| 2308 |
{
|
| 2309 |
int i;
|
| 2310 |
|
| 2311 |
for (i = 0; i < PCI_ROM_SLOT; i++) { |
| 2312 |
vfio_map_bar(vdev, i); |
| 2313 |
} |
| 2314 |
|
| 2315 |
if (vdev->has_vga) {
|
| 2316 |
memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_MEM].mem, |
| 2317 |
&vfio_vga_ops, |
| 2318 |
&vdev->vga.region[QEMU_PCI_VGA_MEM], |
| 2319 |
"vfio-vga-mmio@0xa0000",
|
| 2320 |
QEMU_PCI_VGA_MEM_SIZE); |
| 2321 |
memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem, |
| 2322 |
&vfio_vga_ops, |
| 2323 |
&vdev->vga.region[QEMU_PCI_VGA_IO_LO], |
| 2324 |
"vfio-vga-io@0x3b0",
|
| 2325 |
QEMU_PCI_VGA_IO_LO_SIZE); |
| 2326 |
memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem, |
| 2327 |
&vfio_vga_ops, |
| 2328 |
&vdev->vga.region[QEMU_PCI_VGA_IO_HI], |
| 2329 |
"vfio-vga-io@0x3c0",
|
| 2330 |
QEMU_PCI_VGA_IO_HI_SIZE); |
| 2331 |
|
| 2332 |
pci_register_vga(&vdev->pdev, &vdev->vga.region[QEMU_PCI_VGA_MEM].mem, |
| 2333 |
&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem, |
| 2334 |
&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem); |
| 2335 |
vfio_vga_quirk_setup(vdev); |
| 2336 |
} |
| 2337 |
} |
| 2338 |
|
| 2339 |
static void vfio_unmap_bars(VFIODevice *vdev) |
| 2340 |
{
|
| 2341 |
int i;
|
| 2342 |
|
| 2343 |
for (i = 0; i < PCI_ROM_SLOT; i++) { |
| 2344 |
vfio_unmap_bar(vdev, i); |
| 2345 |
} |
| 2346 |
|
| 2347 |
if (vdev->has_vga) {
|
| 2348 |
vfio_vga_quirk_teardown(vdev); |
| 2349 |
pci_unregister_vga(&vdev->pdev); |
| 2350 |
memory_region_destroy(&vdev->vga.region[QEMU_PCI_VGA_MEM].mem); |
| 2351 |
memory_region_destroy(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem); |
| 2352 |
memory_region_destroy(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem); |
| 2353 |
} |
| 2354 |
} |
| 2355 |
|
| 2356 |
/*
|
| 2357 |
* General setup
|
| 2358 |
*/
|
| 2359 |
static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
|
| 2360 |
{
|
| 2361 |
uint8_t tmp, next = 0xff;
|
| 2362 |
|
| 2363 |
for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
|
| 2364 |
tmp = pdev->config[tmp + 1]) {
|
| 2365 |
if (tmp > pos && tmp < next) {
|
| 2366 |
next = tmp; |
| 2367 |
} |
| 2368 |
} |
| 2369 |
|
| 2370 |
return next - pos;
|
| 2371 |
} |
| 2372 |
|
| 2373 |
static void vfio_set_word_bits(uint8_t *buf, uint16_t val, uint16_t mask) |
| 2374 |
{
|
| 2375 |
pci_set_word(buf, (pci_get_word(buf) & ~mask) | val); |
| 2376 |
} |
| 2377 |
|
| 2378 |
static void vfio_add_emulated_word(VFIODevice *vdev, int pos, |
| 2379 |
uint16_t val, uint16_t mask) |
| 2380 |
{
|
| 2381 |
vfio_set_word_bits(vdev->pdev.config + pos, val, mask); |
| 2382 |
vfio_set_word_bits(vdev->pdev.wmask + pos, ~mask, mask); |
| 2383 |
vfio_set_word_bits(vdev->emulated_config_bits + pos, mask, mask); |
| 2384 |
} |
| 2385 |
|
| 2386 |
static void vfio_set_long_bits(uint8_t *buf, uint32_t val, uint32_t mask) |
| 2387 |
{
|
| 2388 |
pci_set_long(buf, (pci_get_long(buf) & ~mask) | val); |
| 2389 |
} |
| 2390 |
|
| 2391 |
static void vfio_add_emulated_long(VFIODevice *vdev, int pos, |
| 2392 |
uint32_t val, uint32_t mask) |
| 2393 |
{
|
| 2394 |
vfio_set_long_bits(vdev->pdev.config + pos, val, mask); |
| 2395 |
vfio_set_long_bits(vdev->pdev.wmask + pos, ~mask, mask); |
| 2396 |
vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask); |
| 2397 |
} |
| 2398 |
|
| 2399 |
static int vfio_setup_pcie_cap(VFIODevice *vdev, int pos, uint8_t size) |
| 2400 |
{
|
| 2401 |
uint16_t flags; |
| 2402 |
uint8_t type; |
| 2403 |
|
| 2404 |
flags = pci_get_word(vdev->pdev.config + pos + PCI_CAP_FLAGS); |
| 2405 |
type = (flags & PCI_EXP_FLAGS_TYPE) >> 4;
|
| 2406 |
|
| 2407 |
if (type != PCI_EXP_TYPE_ENDPOINT &&
|
| 2408 |
type != PCI_EXP_TYPE_LEG_END && |
| 2409 |
type != PCI_EXP_TYPE_RC_END) {
|
| 2410 |
|
| 2411 |
error_report("vfio: Assignment of PCIe type 0x%x "
|
| 2412 |
"devices is not currently supported", type);
|
| 2413 |
return -EINVAL;
|
| 2414 |
} |
| 2415 |
|
| 2416 |
if (!pci_bus_is_express(vdev->pdev.bus)) {
|
| 2417 |
/*
|
| 2418 |
* Use express capability as-is on PCI bus. It doesn't make much
|
| 2419 |
* sense to even expose, but some drivers (ex. tg3) depend on it
|
| 2420 |
* and guests don't seem to be particular about it. We'll need
|
| 2421 |
* to revist this or force express devices to express buses if we
|
| 2422 |
* ever expose an IOMMU to the guest.
|
| 2423 |
*/
|
| 2424 |
} else if (pci_bus_is_root(vdev->pdev.bus)) { |
| 2425 |
/*
|
| 2426 |
* On a Root Complex bus Endpoints become Root Complex Integrated
|
| 2427 |
* Endpoints, which changes the type and clears the LNK & LNK2 fields.
|
| 2428 |
*/
|
| 2429 |
if (type == PCI_EXP_TYPE_ENDPOINT) {
|
| 2430 |
vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS, |
| 2431 |
PCI_EXP_TYPE_RC_END << 4,
|
| 2432 |
PCI_EXP_FLAGS_TYPE); |
| 2433 |
|
| 2434 |
/* Link Capabilities, Status, and Control goes away */
|
| 2435 |
if (size > PCI_EXP_LNKCTL) {
|
| 2436 |
vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, 0, ~0); |
| 2437 |
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0); |
| 2438 |
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, 0, ~0); |
| 2439 |
|
| 2440 |
#ifndef PCI_EXP_LNKCAP2
|
| 2441 |
#define PCI_EXP_LNKCAP2 44 |
| 2442 |
#endif
|
| 2443 |
#ifndef PCI_EXP_LNKSTA2
|
| 2444 |
#define PCI_EXP_LNKSTA2 50 |
| 2445 |
#endif
|
| 2446 |
/* Link 2 Capabilities, Status, and Control goes away */
|
| 2447 |
if (size > PCI_EXP_LNKCAP2) {
|
| 2448 |
vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP2, 0, ~0); |
| 2449 |
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL2, 0, ~0); |
| 2450 |
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA2, 0, ~0); |
| 2451 |
} |
| 2452 |
} |
| 2453 |
|
| 2454 |
} else if (type == PCI_EXP_TYPE_LEG_END) { |
| 2455 |
/*
|
| 2456 |
* Legacy endpoints don't belong on the root complex. Windows
|
| 2457 |
* seems to be happier with devices if we skip the capability.
|
| 2458 |
*/
|
| 2459 |
return 0; |
| 2460 |
} |
| 2461 |
|
| 2462 |
} else {
|
| 2463 |
/*
|
| 2464 |
* Convert Root Complex Integrated Endpoints to regular endpoints.
|
| 2465 |
* These devices don't support LNK/LNK2 capabilities, so make them up.
|
| 2466 |
*/
|
| 2467 |
if (type == PCI_EXP_TYPE_RC_END) {
|
| 2468 |
vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS, |
| 2469 |
PCI_EXP_TYPE_ENDPOINT << 4,
|
| 2470 |
PCI_EXP_FLAGS_TYPE); |
| 2471 |
vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, |
| 2472 |
PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25, ~0);
|
| 2473 |
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0); |
| 2474 |
} |
| 2475 |
|
| 2476 |
/* Mark the Link Status bits as emulated to allow virtual negotiation */
|
| 2477 |
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, |
| 2478 |
pci_get_word(vdev->pdev.config + pos + |
| 2479 |
PCI_EXP_LNKSTA), |
| 2480 |
PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS); |
| 2481 |
} |
| 2482 |
|
| 2483 |
pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size); |
| 2484 |
if (pos >= 0) { |
| 2485 |
vdev->pdev.exp.exp_cap = pos; |
| 2486 |
} |
| 2487 |
|
| 2488 |
return pos;
|
| 2489 |
} |
| 2490 |
|
| 2491 |
static int vfio_add_std_cap(VFIODevice *vdev, uint8_t pos) |
| 2492 |
{
|
| 2493 |
PCIDevice *pdev = &vdev->pdev; |
| 2494 |
uint8_t cap_id, next, size; |
| 2495 |
int ret;
|
| 2496 |
|
| 2497 |
cap_id = pdev->config[pos]; |
| 2498 |
next = pdev->config[pos + 1];
|
| 2499 |
|
| 2500 |
/*
|
| 2501 |
* If it becomes important to configure capabilities to their actual
|
| 2502 |
* size, use this as the default when it's something we don't recognize.
|
| 2503 |
* Since QEMU doesn't actually handle many of the config accesses,
|
| 2504 |
* exact size doesn't seem worthwhile.
|
| 2505 |
*/
|
| 2506 |
size = vfio_std_cap_max_size(pdev, pos); |
| 2507 |
|
| 2508 |
/*
|
| 2509 |
* pci_add_capability always inserts the new capability at the head
|
| 2510 |
* of the chain. Therefore to end up with a chain that matches the
|
| 2511 |
* physical device, we insert from the end by making this recursive.
|
| 2512 |
* This is also why we pre-caclulate size above as cached config space
|
| 2513 |
* will be changed as we unwind the stack.
|
| 2514 |
*/
|
| 2515 |
if (next) {
|
| 2516 |
ret = vfio_add_std_cap(vdev, next); |
| 2517 |
if (ret) {
|
| 2518 |
return ret;
|
| 2519 |
} |
| 2520 |
} else {
|
| 2521 |
/* Begin the rebuild, use QEMU emulated list bits */
|
| 2522 |
pdev->config[PCI_CAPABILITY_LIST] = 0;
|
| 2523 |
vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;
|
| 2524 |
vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST; |
| 2525 |
} |
| 2526 |
|
| 2527 |
/* Use emulated next pointer to allow dropping caps */
|
| 2528 |
pci_set_byte(vdev->emulated_config_bits + pos + 1, 0xff); |
| 2529 |
|
| 2530 |
switch (cap_id) {
|
| 2531 |
case PCI_CAP_ID_MSI:
|
| 2532 |
ret = vfio_setup_msi(vdev, pos); |
| 2533 |
break;
|
| 2534 |
case PCI_CAP_ID_EXP:
|
| 2535 |
ret = vfio_setup_pcie_cap(vdev, pos, size); |
| 2536 |
break;
|
| 2537 |
case PCI_CAP_ID_MSIX:
|
| 2538 |
ret = vfio_setup_msix(vdev, pos); |
| 2539 |
break;
|
| 2540 |
case PCI_CAP_ID_PM:
|
| 2541 |
vdev->pm_cap = pos; |
| 2542 |
default:
|
| 2543 |
ret = pci_add_capability(pdev, cap_id, pos, size); |
| 2544 |
break;
|
| 2545 |
} |
| 2546 |
|
| 2547 |
if (ret < 0) { |
| 2548 |
error_report("vfio: %04x:%02x:%02x.%x Error adding PCI capability "
|
| 2549 |
"0x%x[0x%x]@0x%x: %d", vdev->host.domain,
|
| 2550 |
vdev->host.bus, vdev->host.slot, vdev->host.function, |
| 2551 |
cap_id, size, pos, ret); |
| 2552 |
return ret;
|
| 2553 |
} |
| 2554 |
|
| 2555 |
return 0; |
| 2556 |
} |
| 2557 |
|
| 2558 |
static int vfio_add_capabilities(VFIODevice *vdev) |
| 2559 |
{
|
| 2560 |
PCIDevice *pdev = &vdev->pdev; |
| 2561 |
|
| 2562 |
if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
|
| 2563 |
!pdev->config[PCI_CAPABILITY_LIST]) {
|
| 2564 |
return 0; /* Nothing to add */ |
| 2565 |
} |
| 2566 |
|
| 2567 |
return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
|
| 2568 |
} |
| 2569 |
|
| 2570 |
static int vfio_load_rom(VFIODevice *vdev) |
| 2571 |
{
|
| 2572 |
uint64_t size = vdev->rom_size; |
| 2573 |
char name[32]; |
| 2574 |
off_t off = 0, voff = vdev->rom_offset;
|
| 2575 |
ssize_t bytes; |
| 2576 |
void *ptr;
|
| 2577 |
|
| 2578 |
/* If loading ROM from file, pci handles it */
|
| 2579 |
if (vdev->pdev.romfile || !vdev->pdev.rom_bar || !size) {
|
| 2580 |
return 0; |
| 2581 |
} |
| 2582 |
|
| 2583 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 2584 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 2585 |
|
| 2586 |
snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom", |
| 2587 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 2588 |
vdev->host.function); |
| 2589 |
memory_region_init_ram(&vdev->pdev.rom, name, size); |
| 2590 |
ptr = memory_region_get_ram_ptr(&vdev->pdev.rom); |
| 2591 |
memset(ptr, 0xff, size);
|
| 2592 |
|
| 2593 |
while (size) {
|
| 2594 |
bytes = pread(vdev->fd, ptr + off, size, voff + off); |
| 2595 |
if (bytes == 0) { |
| 2596 |
break; /* expect that we could get back less than the ROM BAR */ |
| 2597 |
} else if (bytes > 0) { |
| 2598 |
off += bytes; |
| 2599 |
size -= bytes; |
| 2600 |
} else {
|
| 2601 |
if (errno == EINTR || errno == EAGAIN) {
|
| 2602 |
continue;
|
| 2603 |
} |
| 2604 |
error_report("vfio: Error reading device ROM: %m");
|
| 2605 |
memory_region_destroy(&vdev->pdev.rom); |
| 2606 |
return -errno;
|
| 2607 |
} |
| 2608 |
} |
| 2609 |
|
| 2610 |
pci_register_bar(&vdev->pdev, PCI_ROM_SLOT, 0, &vdev->pdev.rom);
|
| 2611 |
vdev->pdev.has_rom = true;
|
| 2612 |
return 0; |
| 2613 |
} |
| 2614 |
|
| 2615 |
static int vfio_connect_container(VFIOGroup *group) |
| 2616 |
{
|
| 2617 |
VFIOContainer *container; |
| 2618 |
int ret, fd;
|
| 2619 |
|
| 2620 |
if (group->container) {
|
| 2621 |
return 0; |
| 2622 |
} |
| 2623 |
|
| 2624 |
QLIST_FOREACH(container, &container_list, next) {
|
| 2625 |
if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
|
| 2626 |
group->container = container; |
| 2627 |
QLIST_INSERT_HEAD(&container->group_list, group, container_next); |
| 2628 |
return 0; |
| 2629 |
} |
| 2630 |
} |
| 2631 |
|
| 2632 |
fd = qemu_open("/dev/vfio/vfio", O_RDWR);
|
| 2633 |
if (fd < 0) { |
| 2634 |
error_report("vfio: failed to open /dev/vfio/vfio: %m");
|
| 2635 |
return -errno;
|
| 2636 |
} |
| 2637 |
|
| 2638 |
ret = ioctl(fd, VFIO_GET_API_VERSION); |
| 2639 |
if (ret != VFIO_API_VERSION) {
|
| 2640 |
error_report("vfio: supported vfio version: %d, "
|
| 2641 |
"reported version: %d", VFIO_API_VERSION, ret);
|
| 2642 |
close(fd); |
| 2643 |
return -EINVAL;
|
| 2644 |
} |
| 2645 |
|
| 2646 |
container = g_malloc0(sizeof(*container));
|
| 2647 |
container->fd = fd; |
| 2648 |
|
| 2649 |
if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU)) {
|
| 2650 |
ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); |
| 2651 |
if (ret) {
|
| 2652 |
error_report("vfio: failed to set group container: %m");
|
| 2653 |
g_free(container); |
| 2654 |
close(fd); |
| 2655 |
return -errno;
|
| 2656 |
} |
| 2657 |
|
| 2658 |
ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU); |
| 2659 |
if (ret) {
|
| 2660 |
error_report("vfio: failed to set iommu for container: %m");
|
| 2661 |
g_free(container); |
| 2662 |
close(fd); |
| 2663 |
return -errno;
|
| 2664 |
} |
| 2665 |
|
| 2666 |
container->iommu_data.listener = vfio_memory_listener; |
| 2667 |
container->iommu_data.release = vfio_listener_release; |
| 2668 |
|
| 2669 |
memory_listener_register(&container->iommu_data.listener, &address_space_memory); |
| 2670 |
} else {
|
| 2671 |
error_report("vfio: No available IOMMU models");
|
| 2672 |
g_free(container); |
| 2673 |
close(fd); |
| 2674 |
return -EINVAL;
|
| 2675 |
} |
| 2676 |
|
| 2677 |
QLIST_INIT(&container->group_list); |
| 2678 |
QLIST_INSERT_HEAD(&container_list, container, next); |
| 2679 |
|
| 2680 |
group->container = container; |
| 2681 |
QLIST_INSERT_HEAD(&container->group_list, group, container_next); |
| 2682 |
|
| 2683 |
return 0; |
| 2684 |
} |
| 2685 |
|
| 2686 |
static void vfio_disconnect_container(VFIOGroup *group) |
| 2687 |
{
|
| 2688 |
VFIOContainer *container = group->container; |
| 2689 |
|
| 2690 |
if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
|
| 2691 |
error_report("vfio: error disconnecting group %d from container",
|
| 2692 |
group->groupid); |
| 2693 |
} |
| 2694 |
|
| 2695 |
QLIST_REMOVE(group, container_next); |
| 2696 |
group->container = NULL;
|
| 2697 |
|
| 2698 |
if (QLIST_EMPTY(&container->group_list)) {
|
| 2699 |
if (container->iommu_data.release) {
|
| 2700 |
container->iommu_data.release(container); |
| 2701 |
} |
| 2702 |
QLIST_REMOVE(container, next); |
| 2703 |
DPRINTF("vfio_disconnect_container: close container->fd\n");
|
| 2704 |
close(container->fd); |
| 2705 |
g_free(container); |
| 2706 |
} |
| 2707 |
} |
| 2708 |
|
| 2709 |
static VFIOGroup *vfio_get_group(int groupid) |
| 2710 |
{
|
| 2711 |
VFIOGroup *group; |
| 2712 |
char path[32]; |
| 2713 |
struct vfio_group_status status = { .argsz = sizeof(status) }; |
| 2714 |
|
| 2715 |
QLIST_FOREACH(group, &group_list, next) {
|
| 2716 |
if (group->groupid == groupid) {
|
| 2717 |
return group;
|
| 2718 |
} |
| 2719 |
} |
| 2720 |
|
| 2721 |
group = g_malloc0(sizeof(*group));
|
| 2722 |
|
| 2723 |
snprintf(path, sizeof(path), "/dev/vfio/%d", groupid); |
| 2724 |
group->fd = qemu_open(path, O_RDWR); |
| 2725 |
if (group->fd < 0) { |
| 2726 |
error_report("vfio: error opening %s: %m", path);
|
| 2727 |
g_free(group); |
| 2728 |
return NULL; |
| 2729 |
} |
| 2730 |
|
| 2731 |
if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
|
| 2732 |
error_report("vfio: error getting group status: %m");
|
| 2733 |
close(group->fd); |
| 2734 |
g_free(group); |
| 2735 |
return NULL; |
| 2736 |
} |
| 2737 |
|
| 2738 |
if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
|
| 2739 |
error_report("vfio: error, group %d is not viable, please ensure "
|
| 2740 |
"all devices within the iommu_group are bound to their "
|
| 2741 |
"vfio bus driver.", groupid);
|
| 2742 |
close(group->fd); |
| 2743 |
g_free(group); |
| 2744 |
return NULL; |
| 2745 |
} |
| 2746 |
|
| 2747 |
group->groupid = groupid; |
| 2748 |
QLIST_INIT(&group->device_list); |
| 2749 |
|
| 2750 |
if (vfio_connect_container(group)) {
|
| 2751 |
error_report("vfio: failed to setup container for group %d", groupid);
|
| 2752 |
close(group->fd); |
| 2753 |
g_free(group); |
| 2754 |
return NULL; |
| 2755 |
} |
| 2756 |
|
| 2757 |
QLIST_INSERT_HEAD(&group_list, group, next); |
| 2758 |
|
| 2759 |
return group;
|
| 2760 |
} |
| 2761 |
|
| 2762 |
static void vfio_put_group(VFIOGroup *group) |
| 2763 |
{
|
| 2764 |
if (!QLIST_EMPTY(&group->device_list)) {
|
| 2765 |
return;
|
| 2766 |
} |
| 2767 |
|
| 2768 |
vfio_disconnect_container(group); |
| 2769 |
QLIST_REMOVE(group, next); |
| 2770 |
DPRINTF("vfio_put_group: close group->fd\n");
|
| 2771 |
close(group->fd); |
| 2772 |
g_free(group); |
| 2773 |
} |
| 2774 |
|
| 2775 |
static int vfio_get_device(VFIOGroup *group, const char *name, VFIODevice *vdev) |
| 2776 |
{
|
| 2777 |
struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) }; |
| 2778 |
struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) }; |
| 2779 |
int ret, i;
|
| 2780 |
|
| 2781 |
ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name); |
| 2782 |
if (ret < 0) { |
| 2783 |
error_report("vfio: error getting device %s from group %d: %m",
|
| 2784 |
name, group->groupid); |
| 2785 |
error_printf("Verify all devices in group %d are bound to vfio-pci "
|
| 2786 |
"or pci-stub and not already in use\n", group->groupid);
|
| 2787 |
return ret;
|
| 2788 |
} |
| 2789 |
|
| 2790 |
vdev->fd = ret; |
| 2791 |
vdev->group = group; |
| 2792 |
QLIST_INSERT_HEAD(&group->device_list, vdev, next); |
| 2793 |
|
| 2794 |
/* Sanity check device */
|
| 2795 |
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_INFO, &dev_info); |
| 2796 |
if (ret) {
|
| 2797 |
error_report("vfio: error getting device info: %m");
|
| 2798 |
goto error;
|
| 2799 |
} |
| 2800 |
|
| 2801 |
DPRINTF("Device %s flags: %u, regions: %u, irgs: %u\n", name,
|
| 2802 |
dev_info.flags, dev_info.num_regions, dev_info.num_irqs); |
| 2803 |
|
| 2804 |
if (!(dev_info.flags & VFIO_DEVICE_FLAGS_PCI)) {
|
| 2805 |
error_report("vfio: Um, this isn't a PCI device");
|
| 2806 |
goto error;
|
| 2807 |
} |
| 2808 |
|
| 2809 |
vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET); |
| 2810 |
if (!vdev->reset_works) {
|
| 2811 |
error_report("Warning, device %s does not support reset", name);
|
| 2812 |
} |
| 2813 |
|
| 2814 |
if (dev_info.num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { |
| 2815 |
error_report("vfio: unexpected number of io regions %u",
|
| 2816 |
dev_info.num_regions); |
| 2817 |
goto error;
|
| 2818 |
} |
| 2819 |
|
| 2820 |
if (dev_info.num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) { |
| 2821 |
error_report("vfio: unexpected number of irqs %u", dev_info.num_irqs);
|
| 2822 |
goto error;
|
| 2823 |
} |
| 2824 |
|
| 2825 |
for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
|
| 2826 |
reg_info.index = i; |
| 2827 |
|
| 2828 |
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info); |
| 2829 |
if (ret) {
|
| 2830 |
error_report("vfio: Error getting region %d info: %m", i);
|
| 2831 |
goto error;
|
| 2832 |
} |
| 2833 |
|
| 2834 |
DPRINTF("Device %s region %d:\n", name, i);
|
| 2835 |
DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
| 2836 |
(unsigned long)reg_info.size, (unsigned long)reg_info.offset, |
| 2837 |
(unsigned long)reg_info.flags); |
| 2838 |
|
| 2839 |
vdev->bars[i].flags = reg_info.flags; |
| 2840 |
vdev->bars[i].size = reg_info.size; |
| 2841 |
vdev->bars[i].fd_offset = reg_info.offset; |
| 2842 |
vdev->bars[i].fd = vdev->fd; |
| 2843 |
vdev->bars[i].nr = i; |
| 2844 |
QLIST_INIT(&vdev->bars[i].quirks); |
| 2845 |
} |
| 2846 |
|
| 2847 |
reg_info.index = VFIO_PCI_ROM_REGION_INDEX; |
| 2848 |
|
| 2849 |
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info); |
| 2850 |
if (ret) {
|
| 2851 |
error_report("vfio: Error getting ROM info: %m");
|
| 2852 |
goto error;
|
| 2853 |
} |
| 2854 |
|
| 2855 |
DPRINTF("Device %s ROM:\n", name);
|
| 2856 |
DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
| 2857 |
(unsigned long)reg_info.size, (unsigned long)reg_info.offset, |
| 2858 |
(unsigned long)reg_info.flags); |
| 2859 |
|
| 2860 |
vdev->rom_size = reg_info.size; |
| 2861 |
vdev->rom_offset = reg_info.offset; |
| 2862 |
|
| 2863 |
reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX; |
| 2864 |
|
| 2865 |
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info); |
| 2866 |
if (ret) {
|
| 2867 |
error_report("vfio: Error getting config info: %m");
|
| 2868 |
goto error;
|
| 2869 |
} |
| 2870 |
|
| 2871 |
DPRINTF("Device %s config:\n", name);
|
| 2872 |
DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
|
| 2873 |
(unsigned long)reg_info.size, (unsigned long)reg_info.offset, |
| 2874 |
(unsigned long)reg_info.flags); |
| 2875 |
|
| 2876 |
vdev->config_size = reg_info.size; |
| 2877 |
if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) {
|
| 2878 |
vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS; |
| 2879 |
} |
| 2880 |
vdev->config_offset = reg_info.offset; |
| 2881 |
|
| 2882 |
if ((vdev->features & VFIO_FEATURE_ENABLE_VGA) &&
|
| 2883 |
dev_info.num_regions > VFIO_PCI_VGA_REGION_INDEX) {
|
| 2884 |
struct vfio_region_info vga_info = {
|
| 2885 |
.argsz = sizeof(vga_info),
|
| 2886 |
.index = VFIO_PCI_VGA_REGION_INDEX, |
| 2887 |
}; |
| 2888 |
|
| 2889 |
ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, &vga_info); |
| 2890 |
if (ret) {
|
| 2891 |
error_report( |
| 2892 |
"vfio: Device does not support requested feature x-vga");
|
| 2893 |
goto error;
|
| 2894 |
} |
| 2895 |
|
| 2896 |
if (!(vga_info.flags & VFIO_REGION_INFO_FLAG_READ) ||
|
| 2897 |
!(vga_info.flags & VFIO_REGION_INFO_FLAG_WRITE) || |
| 2898 |
vga_info.size < 0xbffff + 1) { |
| 2899 |
error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
|
| 2900 |
(unsigned long)vga_info.flags, |
| 2901 |
(unsigned long)vga_info.size); |
| 2902 |
goto error;
|
| 2903 |
} |
| 2904 |
|
| 2905 |
vdev->vga.fd_offset = vga_info.offset; |
| 2906 |
vdev->vga.fd = vdev->fd; |
| 2907 |
|
| 2908 |
vdev->vga.region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE; |
| 2909 |
vdev->vga.region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM; |
| 2910 |
QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_MEM].quirks); |
| 2911 |
|
| 2912 |
vdev->vga.region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE; |
| 2913 |
vdev->vga.region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO; |
| 2914 |
QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].quirks); |
| 2915 |
|
| 2916 |
vdev->vga.region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE; |
| 2917 |
vdev->vga.region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI; |
| 2918 |
QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks); |
| 2919 |
|
| 2920 |
vdev->has_vga = true;
|
| 2921 |
} |
| 2922 |
|
| 2923 |
error:
|
| 2924 |
if (ret) {
|
| 2925 |
QLIST_REMOVE(vdev, next); |
| 2926 |
vdev->group = NULL;
|
| 2927 |
close(vdev->fd); |
| 2928 |
} |
| 2929 |
return ret;
|
| 2930 |
} |
| 2931 |
|
| 2932 |
static void vfio_put_device(VFIODevice *vdev) |
| 2933 |
{
|
| 2934 |
QLIST_REMOVE(vdev, next); |
| 2935 |
vdev->group = NULL;
|
| 2936 |
DPRINTF("vfio_put_device: close vdev->fd\n");
|
| 2937 |
close(vdev->fd); |
| 2938 |
if (vdev->msix) {
|
| 2939 |
g_free(vdev->msix); |
| 2940 |
vdev->msix = NULL;
|
| 2941 |
} |
| 2942 |
} |
| 2943 |
|
| 2944 |
static int vfio_initfn(PCIDevice *pdev) |
| 2945 |
{
|
| 2946 |
VFIODevice *pvdev, *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 2947 |
VFIOGroup *group; |
| 2948 |
char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
|
| 2949 |
ssize_t len; |
| 2950 |
struct stat st;
|
| 2951 |
int groupid;
|
| 2952 |
int ret;
|
| 2953 |
|
| 2954 |
/* Check that the host device exists */
|
| 2955 |
snprintf(path, sizeof(path),
|
| 2956 |
"/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
|
| 2957 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 2958 |
vdev->host.function); |
| 2959 |
if (stat(path, &st) < 0) { |
| 2960 |
error_report("vfio: error: no such host device: %s", path);
|
| 2961 |
return -errno;
|
| 2962 |
} |
| 2963 |
|
| 2964 |
strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1); |
| 2965 |
|
| 2966 |
len = readlink(path, iommu_group_path, PATH_MAX); |
| 2967 |
if (len <= 0) { |
| 2968 |
error_report("vfio: error no iommu_group for device");
|
| 2969 |
return -errno;
|
| 2970 |
} |
| 2971 |
|
| 2972 |
iommu_group_path[len] = 0;
|
| 2973 |
group_name = basename(iommu_group_path); |
| 2974 |
|
| 2975 |
if (sscanf(group_name, "%d", &groupid) != 1) { |
| 2976 |
error_report("vfio: error reading %s: %m", path);
|
| 2977 |
return -errno;
|
| 2978 |
} |
| 2979 |
|
| 2980 |
DPRINTF("%s(%04x:%02x:%02x.%x) group %d\n", __func__, vdev->host.domain,
|
| 2981 |
vdev->host.bus, vdev->host.slot, vdev->host.function, groupid); |
| 2982 |
|
| 2983 |
group = vfio_get_group(groupid); |
| 2984 |
if (!group) {
|
| 2985 |
error_report("vfio: failed to get group %d", groupid);
|
| 2986 |
return -ENOENT;
|
| 2987 |
} |
| 2988 |
|
| 2989 |
snprintf(path, sizeof(path), "%04x:%02x:%02x.%01x", |
| 2990 |
vdev->host.domain, vdev->host.bus, vdev->host.slot, |
| 2991 |
vdev->host.function); |
| 2992 |
|
| 2993 |
QLIST_FOREACH(pvdev, &group->device_list, next) {
|
| 2994 |
if (pvdev->host.domain == vdev->host.domain &&
|
| 2995 |
pvdev->host.bus == vdev->host.bus && |
| 2996 |
pvdev->host.slot == vdev->host.slot && |
| 2997 |
pvdev->host.function == vdev->host.function) {
|
| 2998 |
|
| 2999 |
error_report("vfio: error: device %s is already attached", path);
|
| 3000 |
vfio_put_group(group); |
| 3001 |
return -EBUSY;
|
| 3002 |
} |
| 3003 |
} |
| 3004 |
|
| 3005 |
ret = vfio_get_device(group, path, vdev); |
| 3006 |
if (ret) {
|
| 3007 |
error_report("vfio: failed to get device %s", path);
|
| 3008 |
vfio_put_group(group); |
| 3009 |
return ret;
|
| 3010 |
} |
| 3011 |
|
| 3012 |
/* Get a copy of config space */
|
| 3013 |
ret = pread(vdev->fd, vdev->pdev.config, |
| 3014 |
MIN(pci_config_size(&vdev->pdev), vdev->config_size), |
| 3015 |
vdev->config_offset); |
| 3016 |
if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) { |
| 3017 |
ret = ret < 0 ? -errno : -EFAULT;
|
| 3018 |
error_report("vfio: Failed to read device config space");
|
| 3019 |
goto out_put;
|
| 3020 |
} |
| 3021 |
|
| 3022 |
/* vfio emulates a lot for us, but some bits need extra love */
|
| 3023 |
vdev->emulated_config_bits = g_malloc0(vdev->config_size); |
| 3024 |
|
| 3025 |
/* QEMU can choose to expose the ROM or not */
|
| 3026 |
memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4); |
| 3027 |
|
| 3028 |
/* QEMU can change multi-function devices to single function, or reverse */
|
| 3029 |
vdev->emulated_config_bits[PCI_HEADER_TYPE] = |
| 3030 |
PCI_HEADER_TYPE_MULTI_FUNCTION; |
| 3031 |
|
| 3032 |
/*
|
| 3033 |
* Clear host resource mapping info. If we choose not to register a
|
| 3034 |
* BAR, such as might be the case with the option ROM, we can get
|
| 3035 |
* confusing, unwritable, residual addresses from the host here.
|
| 3036 |
*/
|
| 3037 |
memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24); |
| 3038 |
memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4); |
| 3039 |
|
| 3040 |
vfio_load_rom(vdev); |
| 3041 |
|
| 3042 |
ret = vfio_early_setup_msix(vdev); |
| 3043 |
if (ret) {
|
| 3044 |
goto out_put;
|
| 3045 |
} |
| 3046 |
|
| 3047 |
vfio_map_bars(vdev); |
| 3048 |
|
| 3049 |
ret = vfio_add_capabilities(vdev); |
| 3050 |
if (ret) {
|
| 3051 |
goto out_teardown;
|
| 3052 |
} |
| 3053 |
|
| 3054 |
/* QEMU emulates all of MSI & MSIX */
|
| 3055 |
if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
|
| 3056 |
memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
|
| 3057 |
MSIX_CAP_LENGTH); |
| 3058 |
} |
| 3059 |
|
| 3060 |
if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
|
| 3061 |
memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
|
| 3062 |
vdev->msi_cap_size); |
| 3063 |
} |
| 3064 |
|
| 3065 |
if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) { |
| 3066 |
vdev->intx.mmap_timer = qemu_new_timer_ms(vm_clock, |
| 3067 |
vfio_intx_mmap_enable, vdev); |
| 3068 |
pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_update_irq); |
| 3069 |
ret = vfio_enable_intx(vdev); |
| 3070 |
if (ret) {
|
| 3071 |
goto out_teardown;
|
| 3072 |
} |
| 3073 |
} |
| 3074 |
|
| 3075 |
add_boot_device_path(vdev->bootindex, &pdev->qdev, NULL);
|
| 3076 |
|
| 3077 |
return 0; |
| 3078 |
|
| 3079 |
out_teardown:
|
| 3080 |
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
| 3081 |
vfio_teardown_msi(vdev); |
| 3082 |
vfio_unmap_bars(vdev); |
| 3083 |
out_put:
|
| 3084 |
g_free(vdev->emulated_config_bits); |
| 3085 |
vfio_put_device(vdev); |
| 3086 |
vfio_put_group(group); |
| 3087 |
return ret;
|
| 3088 |
} |
| 3089 |
|
| 3090 |
static void vfio_exitfn(PCIDevice *pdev) |
| 3091 |
{
|
| 3092 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 3093 |
VFIOGroup *group = vdev->group; |
| 3094 |
|
| 3095 |
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
| 3096 |
vfio_disable_interrupts(vdev); |
| 3097 |
if (vdev->intx.mmap_timer) {
|
| 3098 |
qemu_free_timer(vdev->intx.mmap_timer); |
| 3099 |
} |
| 3100 |
vfio_teardown_msi(vdev); |
| 3101 |
vfio_unmap_bars(vdev); |
| 3102 |
g_free(vdev->emulated_config_bits); |
| 3103 |
vfio_put_device(vdev); |
| 3104 |
vfio_put_group(group); |
| 3105 |
} |
| 3106 |
|
| 3107 |
static void vfio_pci_reset(DeviceState *dev) |
| 3108 |
{
|
| 3109 |
PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev); |
| 3110 |
VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); |
| 3111 |
uint16_t cmd; |
| 3112 |
|
| 3113 |
DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
|
| 3114 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 3115 |
|
| 3116 |
vfio_disable_interrupts(vdev); |
| 3117 |
|
| 3118 |
/* Make sure the device is in D0 */
|
| 3119 |
if (vdev->pm_cap) {
|
| 3120 |
uint16_t pmcsr; |
| 3121 |
uint8_t state; |
| 3122 |
|
| 3123 |
pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
|
| 3124 |
state = pmcsr & PCI_PM_CTRL_STATE_MASK; |
| 3125 |
if (state) {
|
| 3126 |
pmcsr &= ~PCI_PM_CTRL_STATE_MASK; |
| 3127 |
vfio_pci_write_config(pdev, vdev->pm_cap + PCI_PM_CTRL, pmcsr, 2);
|
| 3128 |
/* vfio handles the necessary delay here */
|
| 3129 |
pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
|
| 3130 |
state = pmcsr & PCI_PM_CTRL_STATE_MASK; |
| 3131 |
if (state) {
|
| 3132 |
error_report("vfio: Unable to power on device, stuck in D%d\n",
|
| 3133 |
state); |
| 3134 |
} |
| 3135 |
} |
| 3136 |
} |
| 3137 |
|
| 3138 |
/*
|
| 3139 |
* Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
|
| 3140 |
* Also put INTx Disable in known state.
|
| 3141 |
*/
|
| 3142 |
cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
|
| 3143 |
cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | |
| 3144 |
PCI_COMMAND_INTX_DISABLE); |
| 3145 |
vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
|
| 3146 |
|
| 3147 |
if (vdev->reset_works) {
|
| 3148 |
if (ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
|
| 3149 |
error_report("vfio: Error unable to reset physical device "
|
| 3150 |
"(%04x:%02x:%02x.%x): %m", vdev->host.domain,
|
| 3151 |
vdev->host.bus, vdev->host.slot, vdev->host.function); |
| 3152 |
} |
| 3153 |
} |
| 3154 |
|
| 3155 |
vfio_enable_intx(vdev); |
| 3156 |
} |
| 3157 |
|
| 3158 |
static Property vfio_pci_dev_properties[] = {
|
| 3159 |
DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIODevice, host),
|
| 3160 |
DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIODevice,
|
| 3161 |
intx.mmap_timeout, 1100),
|
| 3162 |
DEFINE_PROP_BIT("x-vga", VFIODevice, features,
|
| 3163 |
VFIO_FEATURE_ENABLE_VGA_BIT, false),
|
| 3164 |
DEFINE_PROP_INT32("bootindex", VFIODevice, bootindex, -1), |
| 3165 |
/*
|
| 3166 |
* TODO - support passed fds... is this necessary?
|
| 3167 |
* DEFINE_PROP_STRING("vfiofd", VFIODevice, vfiofd_name),
|
| 3168 |
* DEFINE_PROP_STRING("vfiogroupfd, VFIODevice, vfiogroupfd_name),
|
| 3169 |
*/
|
| 3170 |
DEFINE_PROP_END_OF_LIST(), |
| 3171 |
}; |
| 3172 |
|
| 3173 |
static const VMStateDescription vfio_pci_vmstate = { |
| 3174 |
.name = "vfio-pci",
|
| 3175 |
.unmigratable = 1,
|
| 3176 |
}; |
| 3177 |
|
| 3178 |
static void vfio_pci_dev_class_init(ObjectClass *klass, void *data) |
| 3179 |
{
|
| 3180 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 3181 |
PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass); |
| 3182 |
|
| 3183 |
dc->reset = vfio_pci_reset; |
| 3184 |
dc->props = vfio_pci_dev_properties; |
| 3185 |
dc->vmsd = &vfio_pci_vmstate; |
| 3186 |
dc->desc = "VFIO-based PCI device assignment";
|
| 3187 |
pdc->init = vfio_initfn; |
| 3188 |
pdc->exit = vfio_exitfn; |
| 3189 |
pdc->config_read = vfio_pci_read_config; |
| 3190 |
pdc->config_write = vfio_pci_write_config; |
| 3191 |
pdc->is_express = 1; /* We might be */ |
| 3192 |
} |
| 3193 |
|
| 3194 |
static const TypeInfo vfio_pci_dev_info = { |
| 3195 |
.name = "vfio-pci",
|
| 3196 |
.parent = TYPE_PCI_DEVICE, |
| 3197 |
.instance_size = sizeof(VFIODevice),
|
| 3198 |
.class_init = vfio_pci_dev_class_init, |
| 3199 |
}; |
| 3200 |
|
| 3201 |
static void register_vfio_pci_dev_type(void) |
| 3202 |
{
|
| 3203 |
type_register_static(&vfio_pci_dev_info); |
| 3204 |
} |
| 3205 |
|
| 3206 |
type_init(register_vfio_pci_dev_type) |