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Initial VFIO platform device support, v2 (Eric Auger, et al.)
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIbBAABAgAGBQJVdvdkAAoJECObm247sIsiuf8P92p6f53BdexSdumBnWsGiAjB AHKCYSzp8QaAD++PiMJ7g9PGX8rPrRlTZ8SmE4tOX27hmm8LMlQX7meHLfmu5ZBx f9W+dGqR7g+F6am5fOr+QfdAG+qmZGCsi5jUO8Q+RyQD1B80dPWWc5g0HqgB4sJY JZ+TKO6gyMkk1+Uf7ye23R7JAtqAkbJAyWjHmGCHw4jOUqo250FPTuaRoburG8ED dw9AHviBt5co4b2Ut5Tc69E/TLE8RK+egXeIQdVx2YAV4U0J1wVwXkAFsjtQo6Vi 5AlGDh3el4PhJwEMsaMk+WVxyvQlFOQq9VSe0smnZrRewwrNbXTfaHRVW7mv6v6E kaKfQ0Djlxy26jlbtW1hSfO+xYAEpnUDV94CUgRUHYYBUEZn16NPBTvbiMIW/re0 kpj6Ho0TVboHCIKR2vJxG/AA5ezAJ3g8nSGpMr33FBwY/3eZmE3Tz+fVzB3ilX8h aODq+r9uNiffspjDXsIGwazhBvBW/xH1Z3tyc8PsdVS2r0mJ+tITNBKOX25mrN/b 12Bhy1OTgO/xfU+mOzchEWR3mLQKs9/+uWdeNgKwswv1zrql83wZRSvvdUvykiTy mdTwgNl/nG4QOGippXbJBwjBRArwVdheLP6GHBeIWOmoYYMW7wTvMLZgIHO2GxBT GoFgSBBW/AageH/XCFM= =8dnK -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20150609.0' into staging Initial VFIO platform device support, v2 (Eric Auger, et al.) # gpg: Signature made Tue Jun 9 15:25:40 2015 BST using RSA key ID 3BB08B22 # gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" # gpg: aka "Alex Williamson <alex@shazbot.org>" # gpg: aka "Alex Williamson <alwillia@redhat.com>" # gpg: aka "Alex Williamson <alex.l.williamson@gmail.com>" * remotes/awilliam/tags/vfio-update-20150609.0: hw/vfio/platform: calxeda xgmac device hw/vfio/platform: add irq assignment hw/vfio/platform: vfio-platform skeleton Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
commit
eed8a8f572
@ -1,4 +1,6 @@
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ifeq ($(CONFIG_LINUX), y)
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obj-$(CONFIG_SOFTMMU) += common.o
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obj-$(CONFIG_PCI) += pci.o
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obj-$(CONFIG_SOFTMMU) += platform.o
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obj-$(CONFIG_SOFTMMU) += calxeda-xgmac.o
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endif
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55
hw/vfio/calxeda-xgmac.c
Normal file
55
hw/vfio/calxeda-xgmac.c
Normal file
@ -0,0 +1,55 @@
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/*
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* calxeda xgmac VFIO device
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*
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* Copyright Linaro Limited, 2014
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*
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* Authors:
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* Eric Auger <eric.auger@linaro.org>
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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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*/
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#include "hw/vfio/vfio-calxeda-xgmac.h"
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static void calxeda_xgmac_realize(DeviceState *dev, Error **errp)
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{
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VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(dev);
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VFIOCalxedaXgmacDeviceClass *k = VFIO_CALXEDA_XGMAC_DEVICE_GET_CLASS(dev);
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vdev->compat = g_strdup("calxeda,hb-xgmac");
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k->parent_realize(dev, errp);
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}
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static const VMStateDescription vfio_platform_calxeda_xgmac_vmstate = {
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.name = TYPE_VFIO_CALXEDA_XGMAC,
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.unmigratable = 1,
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};
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static void vfio_calxeda_xgmac_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VFIOCalxedaXgmacDeviceClass *vcxc =
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VFIO_CALXEDA_XGMAC_DEVICE_CLASS(klass);
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vcxc->parent_realize = dc->realize;
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dc->realize = calxeda_xgmac_realize;
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dc->desc = "VFIO Calxeda XGMAC";
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dc->vmsd = &vfio_platform_calxeda_xgmac_vmstate;
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}
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static const TypeInfo vfio_calxeda_xgmac_dev_info = {
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.name = TYPE_VFIO_CALXEDA_XGMAC,
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.parent = TYPE_VFIO_PLATFORM,
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.instance_size = sizeof(VFIOCalxedaXgmacDevice),
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.class_init = vfio_calxeda_xgmac_class_init,
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.class_size = sizeof(VFIOCalxedaXgmacDeviceClass),
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};
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static void register_calxeda_xgmac_dev_type(void)
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{
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type_register_static(&vfio_calxeda_xgmac_dev_info);
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}
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type_init(register_calxeda_xgmac_dev_type)
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616
hw/vfio/platform.c
Normal file
616
hw/vfio/platform.c
Normal file
@ -0,0 +1,616 @@
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/*
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* vfio based device assignment support - platform devices
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*
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* Copyright Linaro Limited, 2014
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*
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* Authors:
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* Kim Phillips <kim.phillips@linaro.org>
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* Eric Auger <eric.auger@linaro.org>
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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 vfio based PCI device assignment support:
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* Copyright Red Hat, Inc. 2012
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*/
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#include <linux/vfio.h>
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#include <sys/ioctl.h>
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#include "hw/vfio/vfio-platform.h"
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#include "qemu/error-report.h"
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#include "qemu/range.h"
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#include "sysemu/sysemu.h"
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#include "exec/memory.h"
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#include "qemu/queue.h"
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#include "hw/sysbus.h"
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#include "trace.h"
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#include "hw/platform-bus.h"
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/*
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* Functions used whatever the injection method
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*/
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/**
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* vfio_init_intp - allocate, initialize the IRQ struct pointer
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* and add it into the list of IRQs
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* @vbasedev: the VFIO device handle
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* @info: irq info struct retrieved from VFIO driver
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*/
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static VFIOINTp *vfio_init_intp(VFIODevice *vbasedev,
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struct vfio_irq_info info)
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{
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int ret;
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VFIOPlatformDevice *vdev =
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container_of(vbasedev, VFIOPlatformDevice, vbasedev);
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SysBusDevice *sbdev = SYS_BUS_DEVICE(vdev);
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VFIOINTp *intp;
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intp = g_malloc0(sizeof(*intp));
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intp->vdev = vdev;
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intp->pin = info.index;
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intp->flags = info.flags;
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intp->state = VFIO_IRQ_INACTIVE;
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sysbus_init_irq(sbdev, &intp->qemuirq);
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/* Get an eventfd for trigger */
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ret = event_notifier_init(&intp->interrupt, 0);
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if (ret) {
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g_free(intp);
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error_report("vfio: Error: trigger event_notifier_init failed ");
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return NULL;
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}
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QLIST_INSERT_HEAD(&vdev->intp_list, intp, next);
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return intp;
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}
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/**
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* vfio_set_trigger_eventfd - set VFIO eventfd handling
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*
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* @intp: IRQ struct handle
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* @handler: handler to be called on eventfd signaling
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*
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* Setup VFIO signaling and attach an optional user-side handler
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* to the eventfd
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*/
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static int vfio_set_trigger_eventfd(VFIOINTp *intp,
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eventfd_user_side_handler_t handler)
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{
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VFIODevice *vbasedev = &intp->vdev->vbasedev;
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struct vfio_irq_set *irq_set;
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int argsz, ret;
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int32_t *pfd;
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argsz = sizeof(*irq_set) + sizeof(*pfd);
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irq_set = g_malloc0(argsz);
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irq_set->argsz = argsz;
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irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
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irq_set->index = intp->pin;
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irq_set->start = 0;
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irq_set->count = 1;
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pfd = (int32_t *)&irq_set->data;
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*pfd = event_notifier_get_fd(&intp->interrupt);
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qemu_set_fd_handler(*pfd, (IOHandler *)handler, NULL, intp);
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ret = ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
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g_free(irq_set);
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if (ret < 0) {
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error_report("vfio: Failed to set trigger eventfd: %m");
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qemu_set_fd_handler(*pfd, NULL, NULL, NULL);
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}
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return ret;
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}
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/*
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* Functions only used when eventfds are handled on user-side
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* ie. without irqfd
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*/
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/**
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* vfio_mmap_set_enabled - enable/disable the fast path mode
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* @vdev: the VFIO platform device
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* @enabled: the target mmap state
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*
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* enabled = true ~ fast path = MMIO region is mmaped (no KVM TRAP);
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* enabled = false ~ slow path = MMIO region is trapped and region callbacks
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* are called; slow path enables to trap the device IRQ status register reset
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*/
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static void vfio_mmap_set_enabled(VFIOPlatformDevice *vdev, bool enabled)
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{
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int i;
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trace_vfio_platform_mmap_set_enabled(enabled);
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for (i = 0; i < vdev->vbasedev.num_regions; i++) {
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VFIORegion *region = vdev->regions[i];
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memory_region_set_enabled(®ion->mmap_mem, enabled);
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}
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}
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/**
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* vfio_intp_mmap_enable - timer function, restores the fast path
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* if there is no more active IRQ
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* @opaque: actually points to the VFIO platform device
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*
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* Called on mmap timer timout, this function checks whether the
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* IRQ is still active and if not, restores the fast path.
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* by construction a single eventfd is handled at a time.
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* if the IRQ is still active, the timer is re-programmed.
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*/
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static void vfio_intp_mmap_enable(void *opaque)
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{
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VFIOINTp *tmp;
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VFIOPlatformDevice *vdev = (VFIOPlatformDevice *)opaque;
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qemu_mutex_lock(&vdev->intp_mutex);
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QLIST_FOREACH(tmp, &vdev->intp_list, next) {
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if (tmp->state == VFIO_IRQ_ACTIVE) {
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trace_vfio_platform_intp_mmap_enable(tmp->pin);
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/* re-program the timer to check active status later */
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timer_mod(vdev->mmap_timer,
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qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
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vdev->mmap_timeout);
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qemu_mutex_unlock(&vdev->intp_mutex);
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return;
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}
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}
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vfio_mmap_set_enabled(vdev, true);
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qemu_mutex_unlock(&vdev->intp_mutex);
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}
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/**
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* vfio_intp_inject_pending_lockheld - Injects a pending IRQ
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* @opaque: opaque pointer, in practice the VFIOINTp handle
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*
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* The function is called on a previous IRQ completion, from
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* vfio_platform_eoi, while the intp_mutex is locked.
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* Also in such situation, the slow path already is set and
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* the mmap timer was already programmed.
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*/
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static void vfio_intp_inject_pending_lockheld(VFIOINTp *intp)
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{
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trace_vfio_platform_intp_inject_pending_lockheld(intp->pin,
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event_notifier_get_fd(&intp->interrupt));
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intp->state = VFIO_IRQ_ACTIVE;
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/* trigger the virtual IRQ */
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qemu_set_irq(intp->qemuirq, 1);
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}
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/**
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* vfio_intp_interrupt - The user-side eventfd handler
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* @opaque: opaque pointer which in practice is the VFIOINTp handle
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*
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* the function is entered in event handler context:
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* the vIRQ is injected into the guest if there is no other active
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* or pending IRQ.
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*/
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static void vfio_intp_interrupt(VFIOINTp *intp)
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{
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int ret;
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VFIOINTp *tmp;
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VFIOPlatformDevice *vdev = intp->vdev;
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bool delay_handling = false;
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qemu_mutex_lock(&vdev->intp_mutex);
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if (intp->state == VFIO_IRQ_INACTIVE) {
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QLIST_FOREACH(tmp, &vdev->intp_list, next) {
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if (tmp->state == VFIO_IRQ_ACTIVE ||
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tmp->state == VFIO_IRQ_PENDING) {
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delay_handling = true;
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break;
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}
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}
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}
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if (delay_handling) {
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/*
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* the new IRQ gets a pending status and is pushed in
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* the pending queue
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*/
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intp->state = VFIO_IRQ_PENDING;
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trace_vfio_intp_interrupt_set_pending(intp->pin);
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QSIMPLEQ_INSERT_TAIL(&vdev->pending_intp_queue,
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intp, pqnext);
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ret = event_notifier_test_and_clear(&intp->interrupt);
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qemu_mutex_unlock(&vdev->intp_mutex);
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return;
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}
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trace_vfio_platform_intp_interrupt(intp->pin,
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event_notifier_get_fd(&intp->interrupt));
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ret = event_notifier_test_and_clear(&intp->interrupt);
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if (!ret) {
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error_report("Error when clearing fd=%d (ret = %d)\n",
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event_notifier_get_fd(&intp->interrupt), ret);
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}
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intp->state = VFIO_IRQ_ACTIVE;
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/* sets slow path */
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vfio_mmap_set_enabled(vdev, false);
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/* trigger the virtual IRQ */
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qemu_set_irq(intp->qemuirq, 1);
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/*
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* Schedule the mmap timer which will restore fastpath when no IRQ
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* is active anymore
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*/
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if (vdev->mmap_timeout) {
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timer_mod(vdev->mmap_timer,
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qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
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vdev->mmap_timeout);
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}
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qemu_mutex_unlock(&vdev->intp_mutex);
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}
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/**
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* vfio_platform_eoi - IRQ completion routine
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* @vbasedev: the VFIO device handle
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*
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* De-asserts the active virtual IRQ and unmasks the physical IRQ
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* (effective for level sensitive IRQ auto-masked by the VFIO driver).
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* Then it handles next pending IRQ if any.
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* eoi function is called on the first access to any MMIO region
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* after an IRQ was triggered, trapped since slow path was set.
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* It is assumed this access corresponds to the IRQ status
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* register reset. With such a mechanism, a single IRQ can be
|
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* handled at a time since there is no way to know which IRQ
|
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* was completed by the guest (we would need additional details
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* about the IRQ status register mask).
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*/
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static void vfio_platform_eoi(VFIODevice *vbasedev)
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{
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VFIOINTp *intp;
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VFIOPlatformDevice *vdev =
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container_of(vbasedev, VFIOPlatformDevice, vbasedev);
|
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|
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qemu_mutex_lock(&vdev->intp_mutex);
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QLIST_FOREACH(intp, &vdev->intp_list, next) {
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if (intp->state == VFIO_IRQ_ACTIVE) {
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trace_vfio_platform_eoi(intp->pin,
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event_notifier_get_fd(&intp->interrupt));
|
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intp->state = VFIO_IRQ_INACTIVE;
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|
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/* deassert the virtual IRQ */
|
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qemu_set_irq(intp->qemuirq, 0);
|
||||
|
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if (intp->flags & VFIO_IRQ_INFO_AUTOMASKED) {
|
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/* unmasks the physical level-sensitive IRQ */
|
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vfio_unmask_single_irqindex(vbasedev, intp->pin);
|
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}
|
||||
|
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/* a single IRQ can be active at a time */
|
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break;
|
||||
}
|
||||
}
|
||||
/* in case there are pending IRQs, handle the first one */
|
||||
if (!QSIMPLEQ_EMPTY(&vdev->pending_intp_queue)) {
|
||||
intp = QSIMPLEQ_FIRST(&vdev->pending_intp_queue);
|
||||
vfio_intp_inject_pending_lockheld(intp);
|
||||
QSIMPLEQ_REMOVE_HEAD(&vdev->pending_intp_queue, pqnext);
|
||||
}
|
||||
qemu_mutex_unlock(&vdev->intp_mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* vfio_start_eventfd_injection - starts the virtual IRQ injection using
|
||||
* user-side handled eventfds
|
||||
* @intp: the IRQ struct pointer
|
||||
*/
|
||||
|
||||
static int vfio_start_eventfd_injection(VFIOINTp *intp)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = vfio_set_trigger_eventfd(intp, vfio_intp_interrupt);
|
||||
if (ret) {
|
||||
error_report("vfio: Error: Failed to pass IRQ fd to the driver: %m");
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* VFIO skeleton */
|
||||
|
||||
static void vfio_platform_compute_needs_reset(VFIODevice *vbasedev)
|
||||
{
|
||||
vbasedev->needs_reset = true;
|
||||
}
|
||||
|
||||
/* not implemented yet */
|
||||
static int vfio_platform_hot_reset_multi(VFIODevice *vbasedev)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* vfio_populate_device - Allocate and populate MMIO region
|
||||
* and IRQ structs according to driver returned information
|
||||
* @vbasedev: the VFIO device handle
|
||||
*
|
||||
*/
|
||||
static int vfio_populate_device(VFIODevice *vbasedev)
|
||||
{
|
||||
VFIOINTp *intp, *tmp;
|
||||
int i, ret = -1;
|
||||
VFIOPlatformDevice *vdev =
|
||||
container_of(vbasedev, VFIOPlatformDevice, vbasedev);
|
||||
|
||||
if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PLATFORM)) {
|
||||
error_report("vfio: Um, this isn't a platform device");
|
||||
return ret;
|
||||
}
|
||||
|
||||
vdev->regions = g_malloc0_n(vbasedev->num_regions,
|
||||
sizeof(VFIORegion *));
|
||||
|
||||
for (i = 0; i < vbasedev->num_regions; i++) {
|
||||
struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
|
||||
VFIORegion *ptr;
|
||||
|
||||
vdev->regions[i] = g_malloc0(sizeof(VFIORegion));
|
||||
ptr = vdev->regions[i];
|
||||
reg_info.index = i;
|
||||
ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
|
||||
if (ret) {
|
||||
error_report("vfio: Error getting region %d info: %m", i);
|
||||
goto reg_error;
|
||||
}
|
||||
ptr->flags = reg_info.flags;
|
||||
ptr->size = reg_info.size;
|
||||
ptr->fd_offset = reg_info.offset;
|
||||
ptr->nr = i;
|
||||
ptr->vbasedev = vbasedev;
|
||||
|
||||
trace_vfio_platform_populate_regions(ptr->nr,
|
||||
(unsigned long)ptr->flags,
|
||||
(unsigned long)ptr->size,
|
||||
ptr->vbasedev->fd,
|
||||
(unsigned long)ptr->fd_offset);
|
||||
}
|
||||
|
||||
vdev->mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
|
||||
vfio_intp_mmap_enable, vdev);
|
||||
|
||||
QSIMPLEQ_INIT(&vdev->pending_intp_queue);
|
||||
|
||||
for (i = 0; i < vbasedev->num_irqs; i++) {
|
||||
struct vfio_irq_info irq = { .argsz = sizeof(irq) };
|
||||
|
||||
irq.index = i;
|
||||
ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq);
|
||||
if (ret) {
|
||||
error_printf("vfio: error getting device %s irq info",
|
||||
vbasedev->name);
|
||||
goto irq_err;
|
||||
} else {
|
||||
trace_vfio_platform_populate_interrupts(irq.index,
|
||||
irq.count,
|
||||
irq.flags);
|
||||
intp = vfio_init_intp(vbasedev, irq);
|
||||
if (!intp) {
|
||||
error_report("vfio: Error installing IRQ %d up", i);
|
||||
goto irq_err;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
irq_err:
|
||||
timer_del(vdev->mmap_timer);
|
||||
QLIST_FOREACH_SAFE(intp, &vdev->intp_list, next, tmp) {
|
||||
QLIST_REMOVE(intp, next);
|
||||
g_free(intp);
|
||||
}
|
||||
reg_error:
|
||||
for (i = 0; i < vbasedev->num_regions; i++) {
|
||||
g_free(vdev->regions[i]);
|
||||
}
|
||||
g_free(vdev->regions);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* specialized functions for VFIO Platform devices */
|
||||
static VFIODeviceOps vfio_platform_ops = {
|
||||
.vfio_compute_needs_reset = vfio_platform_compute_needs_reset,
|
||||
.vfio_hot_reset_multi = vfio_platform_hot_reset_multi,
|
||||
.vfio_eoi = vfio_platform_eoi,
|
||||
};
|
||||
|
||||
/**
|
||||
* vfio_base_device_init - perform preliminary VFIO setup
|
||||
* @vbasedev: the VFIO device handle
|
||||
*
|
||||
* Implement the VFIO command sequence that allows to discover
|
||||
* assigned device resources: group extraction, device
|
||||
* fd retrieval, resource query.
|
||||
* Precondition: the device name must be initialized
|
||||
*/
|
||||
static int vfio_base_device_init(VFIODevice *vbasedev)
|
||||
{
|
||||
VFIOGroup *group;
|
||||
VFIODevice *vbasedev_iter;
|
||||
char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
|
||||
ssize_t len;
|
||||
struct stat st;
|
||||
int groupid;
|
||||
int ret;
|
||||
|
||||
/* name must be set prior to the call */
|
||||
if (!vbasedev->name || strchr(vbasedev->name, '/')) {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Check that the host device exists */
|
||||
g_snprintf(path, sizeof(path), "/sys/bus/platform/devices/%s/",
|
||||
vbasedev->name);
|
||||
|
||||
if (stat(path, &st) < 0) {
|
||||
error_report("vfio: error: no such host device: %s", path);
|
||||
return -errno;
|
||||
}
|
||||
|
||||
g_strlcat(path, "iommu_group", sizeof(path));
|
||||
len = readlink(path, iommu_group_path, sizeof(iommu_group_path));
|
||||
if (len < 0 || len >= sizeof(iommu_group_path)) {
|
||||
error_report("vfio: error no iommu_group for device");
|
||||
return len < 0 ? -errno : -ENAMETOOLONG;
|
||||
}
|
||||
|
||||
iommu_group_path[len] = 0;
|
||||
group_name = basename(iommu_group_path);
|
||||
|
||||
if (sscanf(group_name, "%d", &groupid) != 1) {
|
||||
error_report("vfio: error reading %s: %m", path);
|
||||
return -errno;
|
||||
}
|
||||
|
||||
trace_vfio_platform_base_device_init(vbasedev->name, groupid);
|
||||
|
||||
group = vfio_get_group(groupid, &address_space_memory);
|
||||
if (!group) {
|
||||
error_report("vfio: failed to get group %d", groupid);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
g_snprintf(path, sizeof(path), "%s", vbasedev->name);
|
||||
|
||||
QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
|
||||
if (strcmp(vbasedev_iter->name, vbasedev->name) == 0) {
|
||||
error_report("vfio: error: device %s is already attached", path);
|
||||
vfio_put_group(group);
|
||||
return -EBUSY;
|
||||
}
|
||||
}
|
||||
ret = vfio_get_device(group, path, vbasedev);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to get device %s", path);
|
||||
vfio_put_group(group);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = vfio_populate_device(vbasedev);
|
||||
if (ret) {
|
||||
error_report("vfio: failed to populate device %s", path);
|
||||
vfio_put_group(group);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* vfio_map_region - initialize the 2 memory regions for a given
|
||||
* MMIO region index
|
||||
* @vdev: the VFIO platform device handle
|
||||
* @nr: the index of the region
|
||||
*
|
||||
* Init the top memory region and the mmapped memory region beneath
|
||||
* VFIOPlatformDevice is used since VFIODevice is not a QOM Object
|
||||
* and could not be passed to memory region functions
|
||||
*/
|
||||
static void vfio_map_region(VFIOPlatformDevice *vdev, int nr)
|
||||
{
|
||||
VFIORegion *region = vdev->regions[nr];
|
||||
uint64_t size = region->size;
|
||||
char name[64];
|
||||
|
||||
if (!size) {
|
||||
return;
|
||||
}
|
||||
|
||||
g_snprintf(name, sizeof(name), "VFIO %s region %d",
|
||||
vdev->vbasedev.name, nr);
|
||||
|
||||
/* A "slow" read/write mapping underlies all regions */
|
||||
memory_region_init_io(®ion->mem, OBJECT(vdev), &vfio_region_ops,
|
||||
region, name, size);
|
||||
|
||||
g_strlcat(name, " mmap", sizeof(name));
|
||||
|
||||
if (vfio_mmap_region(OBJECT(vdev), region, ®ion->mem,
|
||||
®ion->mmap_mem, ®ion->mmap, size, 0, name)) {
|
||||
error_report("%s unsupported. Performance may be slow", name);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* vfio_platform_realize - the device realize function
|
||||
* @dev: device state pointer
|
||||
* @errp: error
|
||||
*
|
||||
* initialize the device, its memory regions and IRQ structures
|
||||
* IRQ are started separately
|
||||
*/
|
||||
static void vfio_platform_realize(DeviceState *dev, Error **errp)
|
||||
{
|
||||
VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(dev);
|
||||
SysBusDevice *sbdev = SYS_BUS_DEVICE(dev);
|
||||
VFIODevice *vbasedev = &vdev->vbasedev;
|
||||
VFIOINTp *intp;
|
||||
int i, ret;
|
||||
|
||||
vbasedev->type = VFIO_DEVICE_TYPE_PLATFORM;
|
||||
vbasedev->ops = &vfio_platform_ops;
|
||||
|
||||
trace_vfio_platform_realize(vbasedev->name, vdev->compat);
|
||||
|
||||
ret = vfio_base_device_init(vbasedev);
|
||||
if (ret) {
|
||||
error_setg(errp, "vfio: vfio_base_device_init failed for %s",
|
||||
vbasedev->name);
|
||||
return;
|
||||
}
|
||||
|
||||
for (i = 0; i < vbasedev->num_regions; i++) {
|
||||
vfio_map_region(vdev, i);
|
||||
sysbus_init_mmio(sbdev, &vdev->regions[i]->mem);
|
||||
}
|
||||
|
||||
QLIST_FOREACH(intp, &vdev->intp_list, next) {
|
||||
vfio_start_eventfd_injection(intp);
|
||||
}
|
||||
}
|
||||
|
||||
static const VMStateDescription vfio_platform_vmstate = {
|
||||
.name = TYPE_VFIO_PLATFORM,
|
||||
.unmigratable = 1,
|
||||
};
|
||||
|
||||
static Property vfio_platform_dev_properties[] = {
|
||||
DEFINE_PROP_STRING("host", VFIOPlatformDevice, vbasedev.name),
|
||||
DEFINE_PROP_BOOL("x-mmap", VFIOPlatformDevice, vbasedev.allow_mmap, true),
|
||||
DEFINE_PROP_UINT32("mmap-timeout-ms", VFIOPlatformDevice,
|
||||
mmap_timeout, 1100),
|
||||
DEFINE_PROP_END_OF_LIST(),
|
||||
};
|
||||
|
||||
static void vfio_platform_class_init(ObjectClass *klass, void *data)
|
||||
{
|
||||
DeviceClass *dc = DEVICE_CLASS(klass);
|
||||
|
||||
dc->realize = vfio_platform_realize;
|
||||
dc->props = vfio_platform_dev_properties;
|
||||
dc->vmsd = &vfio_platform_vmstate;
|
||||
dc->desc = "VFIO-based platform device assignment";
|
||||
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
||||
}
|
||||
|
||||
static const TypeInfo vfio_platform_dev_info = {
|
||||
.name = TYPE_VFIO_PLATFORM,
|
||||
.parent = TYPE_SYS_BUS_DEVICE,
|
||||
.instance_size = sizeof(VFIOPlatformDevice),
|
||||
.class_init = vfio_platform_class_init,
|
||||
.class_size = sizeof(VFIOPlatformDeviceClass),
|
||||
.abstract = true,
|
||||
};
|
||||
|
||||
static void register_vfio_platform_dev_type(void)
|
||||
{
|
||||
type_register_static(&vfio_platform_dev_info);
|
||||
}
|
||||
|
||||
type_init(register_vfio_platform_dev_type)
|
||||
46
include/hw/vfio/vfio-calxeda-xgmac.h
Normal file
46
include/hw/vfio/vfio-calxeda-xgmac.h
Normal file
@ -0,0 +1,46 @@
|
||||
/*
|
||||
* VFIO calxeda xgmac device
|
||||
*
|
||||
* Copyright Linaro Limited, 2014
|
||||
*
|
||||
* Authors:
|
||||
* Eric Auger <eric.auger@linaro.org>
|
||||
*
|
||||
* This work is licensed under the terms of the GNU GPL, version 2. See
|
||||
* the COPYING file in the top-level directory.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef HW_VFIO_VFIO_CALXEDA_XGMAC_H
|
||||
#define HW_VFIO_VFIO_CALXEDA_XGMAC_H
|
||||
|
||||
#include "hw/vfio/vfio-platform.h"
|
||||
|
||||
#define TYPE_VFIO_CALXEDA_XGMAC "vfio-calxeda-xgmac"
|
||||
|
||||
/**
|
||||
* This device exposes:
|
||||
* - a single MMIO region corresponding to its register space
|
||||
* - 3 IRQS (main and 2 power related IRQs)
|
||||
*/
|
||||
typedef struct VFIOCalxedaXgmacDevice {
|
||||
VFIOPlatformDevice vdev;
|
||||
} VFIOCalxedaXgmacDevice;
|
||||
|
||||
typedef struct VFIOCalxedaXgmacDeviceClass {
|
||||
/*< private >*/
|
||||
VFIOPlatformDeviceClass parent_class;
|
||||
/*< public >*/
|
||||
DeviceRealize parent_realize;
|
||||
} VFIOCalxedaXgmacDeviceClass;
|
||||
|
||||
#define VFIO_CALXEDA_XGMAC_DEVICE(obj) \
|
||||
OBJECT_CHECK(VFIOCalxedaXgmacDevice, (obj), TYPE_VFIO_CALXEDA_XGMAC)
|
||||
#define VFIO_CALXEDA_XGMAC_DEVICE_CLASS(klass) \
|
||||
OBJECT_CLASS_CHECK(VFIOCalxedaXgmacDeviceClass, (klass), \
|
||||
TYPE_VFIO_CALXEDA_XGMAC)
|
||||
#define VFIO_CALXEDA_XGMAC_DEVICE_GET_CLASS(obj) \
|
||||
OBJECT_GET_CLASS(VFIOCalxedaXgmacDeviceClass, (obj), \
|
||||
TYPE_VFIO_CALXEDA_XGMAC)
|
||||
|
||||
#endif
|
||||
@ -42,6 +42,7 @@
|
||||
|
||||
enum {
|
||||
VFIO_DEVICE_TYPE_PCI = 0,
|
||||
VFIO_DEVICE_TYPE_PLATFORM = 1,
|
||||
};
|
||||
|
||||
typedef struct VFIORegion {
|
||||
|
||||
75
include/hw/vfio/vfio-platform.h
Normal file
75
include/hw/vfio/vfio-platform.h
Normal file
@ -0,0 +1,75 @@
|
||||
/*
|
||||
* vfio based device assignment support - platform devices
|
||||
*
|
||||
* Copyright Linaro Limited, 2014
|
||||
*
|
||||
* Authors:
|
||||
* Kim Phillips <kim.phillips@linaro.org>
|
||||
*
|
||||
* This work is licensed under the terms of the GNU GPL, version 2. See
|
||||
* the COPYING file in the top-level directory.
|
||||
*
|
||||
* Based on vfio based PCI device assignment support:
|
||||
* Copyright Red Hat, Inc. 2012
|
||||
*/
|
||||
|
||||
#ifndef HW_VFIO_VFIO_PLATFORM_H
|
||||
#define HW_VFIO_VFIO_PLATFORM_H
|
||||
|
||||
#include "hw/sysbus.h"
|
||||
#include "hw/vfio/vfio-common.h"
|
||||
#include "qemu/event_notifier.h"
|
||||
#include "qemu/queue.h"
|
||||
#include "hw/irq.h"
|
||||
|
||||
#define TYPE_VFIO_PLATFORM "vfio-platform"
|
||||
|
||||
enum {
|
||||
VFIO_IRQ_INACTIVE = 0,
|
||||
VFIO_IRQ_PENDING = 1,
|
||||
VFIO_IRQ_ACTIVE = 2,
|
||||
/* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */
|
||||
};
|
||||
|
||||
typedef struct VFIOINTp {
|
||||
QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */
|
||||
QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */
|
||||
EventNotifier interrupt; /* eventfd triggered on interrupt */
|
||||
EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
|
||||
qemu_irq qemuirq;
|
||||
struct VFIOPlatformDevice *vdev; /* back pointer to device */
|
||||
int state; /* inactive, pending, active */
|
||||
uint8_t pin; /* index */
|
||||
uint32_t flags; /* IRQ info flags */
|
||||
} VFIOINTp;
|
||||
|
||||
/* function type for user side eventfd handler */
|
||||
typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp);
|
||||
|
||||
typedef struct VFIOPlatformDevice {
|
||||
SysBusDevice sbdev;
|
||||
VFIODevice vbasedev; /* not a QOM object */
|
||||
VFIORegion **regions;
|
||||
QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */
|
||||
/* queue of pending IRQs */
|
||||
QSIMPLEQ_HEAD(pending_intp_queue, VFIOINTp) pending_intp_queue;
|
||||
char *compat; /* compatibility string */
|
||||
uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
|
||||
QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */
|
||||
QemuMutex intp_mutex; /* protect the intp_list IRQ state */
|
||||
} VFIOPlatformDevice;
|
||||
|
||||
typedef struct VFIOPlatformDeviceClass {
|
||||
/*< private >*/
|
||||
SysBusDeviceClass parent_class;
|
||||
/*< public >*/
|
||||
} VFIOPlatformDeviceClass;
|
||||
|
||||
#define VFIO_PLATFORM_DEVICE(obj) \
|
||||
OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM)
|
||||
#define VFIO_PLATFORM_DEVICE_CLASS(klass) \
|
||||
OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM)
|
||||
#define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \
|
||||
OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM)
|
||||
|
||||
#endif /*HW_VFIO_VFIO_PLATFORM_H*/
|
||||
12
trace-events
12
trace-events
@ -1564,6 +1564,18 @@ vfio_put_group(int fd) "close group->fd=%d"
|
||||
vfio_get_device(const char * name, unsigned int flags, unsigned int num_regions, unsigned int num_irqs) "Device %s flags: %u, regions: %u, irqs: %u"
|
||||
vfio_put_base_device(int fd) "close vdev->fd=%d"
|
||||
|
||||
# hw/vfio/platform.c
|
||||
vfio_platform_populate_regions(int region_index, unsigned long flag, unsigned long size, int fd, unsigned long offset) "- region %d flags = 0x%lx, size = 0x%lx, fd= %d, offset = 0x%lx"
|
||||
vfio_platform_base_device_init(char *name, int groupid) "%s belongs to group #%d"
|
||||
vfio_platform_realize(char *name, char *compat) "vfio device %s, compat = %s"
|
||||
vfio_platform_eoi(int pin, int fd) "EOI IRQ pin %d (fd=%d)"
|
||||
vfio_platform_mmap_set_enabled(bool enabled) "fast path = %d"
|
||||
vfio_platform_intp_mmap_enable(int pin) "IRQ #%d still active, stay in slow path"
|
||||
vfio_platform_intp_interrupt(int pin, int fd) "Inject IRQ #%d (fd = %d)"
|
||||
vfio_platform_intp_inject_pending_lockheld(int pin, int fd) "Inject pending IRQ #%d (fd = %d)"
|
||||
vfio_platform_populate_interrupts(int pin, int count, int flags) "- IRQ index %d: count %d, flags=0x%x"
|
||||
vfio_intp_interrupt_set_pending(int index) "irq %d is set PENDING"
|
||||
|
||||
#hw/acpi/memory_hotplug.c
|
||||
mhp_acpi_invalid_slot_selected(uint32_t slot) "0x%"PRIx32
|
||||
mhp_acpi_ejecting_invalid_slot(uint32_t slot) "0x%"PRIx32
|
||||
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Reference in New Issue
Block a user