mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 07:06:38 +07:00
7e992d6927
The virqfd functionality that is used by VFIO_PCI to implement interrupt masking and unmasking via an eventfd, is generic enough and can be reused by another driver. Move it to a separate file in order to allow the code to be shared. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Tested-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
676 lines
16 KiB
C
676 lines
16 KiB
C
/*
|
|
* VFIO PCI interrupt handling
|
|
*
|
|
* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
|
* Author: Alex Williamson <alex.williamson@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Derived from original vfio:
|
|
* Copyright 2010 Cisco Systems, Inc. All rights reserved.
|
|
* Author: Tom Lyon, pugs@cisco.com
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/eventfd.h>
|
|
#include <linux/msi.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/file.h>
|
|
#include <linux/vfio.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "vfio_pci_private.h"
|
|
|
|
/*
|
|
* INTx
|
|
*/
|
|
static void vfio_send_intx_eventfd(void *opaque, void *unused)
|
|
{
|
|
struct vfio_pci_device *vdev = opaque;
|
|
|
|
if (likely(is_intx(vdev) && !vdev->virq_disabled))
|
|
eventfd_signal(vdev->ctx[0].trigger, 1);
|
|
}
|
|
|
|
void vfio_pci_intx_mask(struct vfio_pci_device *vdev)
|
|
{
|
|
struct pci_dev *pdev = vdev->pdev;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&vdev->irqlock, flags);
|
|
|
|
/*
|
|
* Masking can come from interrupt, ioctl, or config space
|
|
* via INTx disable. The latter means this can get called
|
|
* even when not using intx delivery. In this case, just
|
|
* try to have the physical bit follow the virtual bit.
|
|
*/
|
|
if (unlikely(!is_intx(vdev))) {
|
|
if (vdev->pci_2_3)
|
|
pci_intx(pdev, 0);
|
|
} else if (!vdev->ctx[0].masked) {
|
|
/*
|
|
* Can't use check_and_mask here because we always want to
|
|
* mask, not just when something is pending.
|
|
*/
|
|
if (vdev->pci_2_3)
|
|
pci_intx(pdev, 0);
|
|
else
|
|
disable_irq_nosync(pdev->irq);
|
|
|
|
vdev->ctx[0].masked = true;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vdev->irqlock, flags);
|
|
}
|
|
|
|
/*
|
|
* If this is triggered by an eventfd, we can't call eventfd_signal
|
|
* or else we'll deadlock on the eventfd wait queue. Return >0 when
|
|
* a signal is necessary, which can then be handled via a work queue
|
|
* or directly depending on the caller.
|
|
*/
|
|
static int vfio_pci_intx_unmask_handler(void *opaque, void *unused)
|
|
{
|
|
struct vfio_pci_device *vdev = opaque;
|
|
struct pci_dev *pdev = vdev->pdev;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
spin_lock_irqsave(&vdev->irqlock, flags);
|
|
|
|
/*
|
|
* Unmasking comes from ioctl or config, so again, have the
|
|
* physical bit follow the virtual even when not using INTx.
|
|
*/
|
|
if (unlikely(!is_intx(vdev))) {
|
|
if (vdev->pci_2_3)
|
|
pci_intx(pdev, 1);
|
|
} else if (vdev->ctx[0].masked && !vdev->virq_disabled) {
|
|
/*
|
|
* A pending interrupt here would immediately trigger,
|
|
* but we can avoid that overhead by just re-sending
|
|
* the interrupt to the user.
|
|
*/
|
|
if (vdev->pci_2_3) {
|
|
if (!pci_check_and_unmask_intx(pdev))
|
|
ret = 1;
|
|
} else
|
|
enable_irq(pdev->irq);
|
|
|
|
vdev->ctx[0].masked = (ret > 0);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vdev->irqlock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void vfio_pci_intx_unmask(struct vfio_pci_device *vdev)
|
|
{
|
|
if (vfio_pci_intx_unmask_handler(vdev, NULL) > 0)
|
|
vfio_send_intx_eventfd(vdev, NULL);
|
|
}
|
|
|
|
static irqreturn_t vfio_intx_handler(int irq, void *dev_id)
|
|
{
|
|
struct vfio_pci_device *vdev = dev_id;
|
|
unsigned long flags;
|
|
int ret = IRQ_NONE;
|
|
|
|
spin_lock_irqsave(&vdev->irqlock, flags);
|
|
|
|
if (!vdev->pci_2_3) {
|
|
disable_irq_nosync(vdev->pdev->irq);
|
|
vdev->ctx[0].masked = true;
|
|
ret = IRQ_HANDLED;
|
|
} else if (!vdev->ctx[0].masked && /* may be shared */
|
|
pci_check_and_mask_intx(vdev->pdev)) {
|
|
vdev->ctx[0].masked = true;
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vdev->irqlock, flags);
|
|
|
|
if (ret == IRQ_HANDLED)
|
|
vfio_send_intx_eventfd(vdev, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vfio_intx_enable(struct vfio_pci_device *vdev)
|
|
{
|
|
if (!is_irq_none(vdev))
|
|
return -EINVAL;
|
|
|
|
if (!vdev->pdev->irq)
|
|
return -ENODEV;
|
|
|
|
vdev->ctx = kzalloc(sizeof(struct vfio_pci_irq_ctx), GFP_KERNEL);
|
|
if (!vdev->ctx)
|
|
return -ENOMEM;
|
|
|
|
vdev->num_ctx = 1;
|
|
|
|
/*
|
|
* If the virtual interrupt is masked, restore it. Devices
|
|
* supporting DisINTx can be masked at the hardware level
|
|
* here, non-PCI-2.3 devices will have to wait until the
|
|
* interrupt is enabled.
|
|
*/
|
|
vdev->ctx[0].masked = vdev->virq_disabled;
|
|
if (vdev->pci_2_3)
|
|
pci_intx(vdev->pdev, !vdev->ctx[0].masked);
|
|
|
|
vdev->irq_type = VFIO_PCI_INTX_IRQ_INDEX;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_intx_set_signal(struct vfio_pci_device *vdev, int fd)
|
|
{
|
|
struct pci_dev *pdev = vdev->pdev;
|
|
unsigned long irqflags = IRQF_SHARED;
|
|
struct eventfd_ctx *trigger;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (vdev->ctx[0].trigger) {
|
|
free_irq(pdev->irq, vdev);
|
|
kfree(vdev->ctx[0].name);
|
|
eventfd_ctx_put(vdev->ctx[0].trigger);
|
|
vdev->ctx[0].trigger = NULL;
|
|
}
|
|
|
|
if (fd < 0) /* Disable only */
|
|
return 0;
|
|
|
|
vdev->ctx[0].name = kasprintf(GFP_KERNEL, "vfio-intx(%s)",
|
|
pci_name(pdev));
|
|
if (!vdev->ctx[0].name)
|
|
return -ENOMEM;
|
|
|
|
trigger = eventfd_ctx_fdget(fd);
|
|
if (IS_ERR(trigger)) {
|
|
kfree(vdev->ctx[0].name);
|
|
return PTR_ERR(trigger);
|
|
}
|
|
|
|
vdev->ctx[0].trigger = trigger;
|
|
|
|
if (!vdev->pci_2_3)
|
|
irqflags = 0;
|
|
|
|
ret = request_irq(pdev->irq, vfio_intx_handler,
|
|
irqflags, vdev->ctx[0].name, vdev);
|
|
if (ret) {
|
|
vdev->ctx[0].trigger = NULL;
|
|
kfree(vdev->ctx[0].name);
|
|
eventfd_ctx_put(trigger);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* INTx disable will stick across the new irq setup,
|
|
* disable_irq won't.
|
|
*/
|
|
spin_lock_irqsave(&vdev->irqlock, flags);
|
|
if (!vdev->pci_2_3 && vdev->ctx[0].masked)
|
|
disable_irq_nosync(pdev->irq);
|
|
spin_unlock_irqrestore(&vdev->irqlock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_intx_disable(struct vfio_pci_device *vdev)
|
|
{
|
|
vfio_intx_set_signal(vdev, -1);
|
|
vfio_virqfd_disable(&vdev->ctx[0].unmask);
|
|
vfio_virqfd_disable(&vdev->ctx[0].mask);
|
|
vdev->irq_type = VFIO_PCI_NUM_IRQS;
|
|
vdev->num_ctx = 0;
|
|
kfree(vdev->ctx);
|
|
}
|
|
|
|
/*
|
|
* MSI/MSI-X
|
|
*/
|
|
static irqreturn_t vfio_msihandler(int irq, void *arg)
|
|
{
|
|
struct eventfd_ctx *trigger = arg;
|
|
|
|
eventfd_signal(trigger, 1);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int vfio_msi_enable(struct vfio_pci_device *vdev, int nvec, bool msix)
|
|
{
|
|
struct pci_dev *pdev = vdev->pdev;
|
|
int ret;
|
|
|
|
if (!is_irq_none(vdev))
|
|
return -EINVAL;
|
|
|
|
vdev->ctx = kzalloc(nvec * sizeof(struct vfio_pci_irq_ctx), GFP_KERNEL);
|
|
if (!vdev->ctx)
|
|
return -ENOMEM;
|
|
|
|
if (msix) {
|
|
int i;
|
|
|
|
vdev->msix = kzalloc(nvec * sizeof(struct msix_entry),
|
|
GFP_KERNEL);
|
|
if (!vdev->msix) {
|
|
kfree(vdev->ctx);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < nvec; i++)
|
|
vdev->msix[i].entry = i;
|
|
|
|
ret = pci_enable_msix_range(pdev, vdev->msix, 1, nvec);
|
|
if (ret < nvec) {
|
|
if (ret > 0)
|
|
pci_disable_msix(pdev);
|
|
kfree(vdev->msix);
|
|
kfree(vdev->ctx);
|
|
return ret;
|
|
}
|
|
} else {
|
|
ret = pci_enable_msi_range(pdev, 1, nvec);
|
|
if (ret < nvec) {
|
|
if (ret > 0)
|
|
pci_disable_msi(pdev);
|
|
kfree(vdev->ctx);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
vdev->num_ctx = nvec;
|
|
vdev->irq_type = msix ? VFIO_PCI_MSIX_IRQ_INDEX :
|
|
VFIO_PCI_MSI_IRQ_INDEX;
|
|
|
|
if (!msix) {
|
|
/*
|
|
* Compute the virtual hardware field for max msi vectors -
|
|
* it is the log base 2 of the number of vectors.
|
|
*/
|
|
vdev->msi_qmax = fls(nvec * 2 - 1) - 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev,
|
|
int vector, int fd, bool msix)
|
|
{
|
|
struct pci_dev *pdev = vdev->pdev;
|
|
int irq = msix ? vdev->msix[vector].vector : pdev->irq + vector;
|
|
char *name = msix ? "vfio-msix" : "vfio-msi";
|
|
struct eventfd_ctx *trigger;
|
|
int ret;
|
|
|
|
if (vector >= vdev->num_ctx)
|
|
return -EINVAL;
|
|
|
|
if (vdev->ctx[vector].trigger) {
|
|
free_irq(irq, vdev->ctx[vector].trigger);
|
|
kfree(vdev->ctx[vector].name);
|
|
eventfd_ctx_put(vdev->ctx[vector].trigger);
|
|
vdev->ctx[vector].trigger = NULL;
|
|
}
|
|
|
|
if (fd < 0)
|
|
return 0;
|
|
|
|
vdev->ctx[vector].name = kasprintf(GFP_KERNEL, "%s[%d](%s)",
|
|
name, vector, pci_name(pdev));
|
|
if (!vdev->ctx[vector].name)
|
|
return -ENOMEM;
|
|
|
|
trigger = eventfd_ctx_fdget(fd);
|
|
if (IS_ERR(trigger)) {
|
|
kfree(vdev->ctx[vector].name);
|
|
return PTR_ERR(trigger);
|
|
}
|
|
|
|
/*
|
|
* The MSIx vector table resides in device memory which may be cleared
|
|
* via backdoor resets. We don't allow direct access to the vector
|
|
* table so even if a userspace driver attempts to save/restore around
|
|
* such a reset it would be unsuccessful. To avoid this, restore the
|
|
* cached value of the message prior to enabling.
|
|
*/
|
|
if (msix) {
|
|
struct msi_msg msg;
|
|
|
|
get_cached_msi_msg(irq, &msg);
|
|
pci_write_msi_msg(irq, &msg);
|
|
}
|
|
|
|
ret = request_irq(irq, vfio_msihandler, 0,
|
|
vdev->ctx[vector].name, trigger);
|
|
if (ret) {
|
|
kfree(vdev->ctx[vector].name);
|
|
eventfd_ctx_put(trigger);
|
|
return ret;
|
|
}
|
|
|
|
vdev->ctx[vector].trigger = trigger;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_msi_set_block(struct vfio_pci_device *vdev, unsigned start,
|
|
unsigned count, int32_t *fds, bool msix)
|
|
{
|
|
int i, j, ret = 0;
|
|
|
|
if (start + count > vdev->num_ctx)
|
|
return -EINVAL;
|
|
|
|
for (i = 0, j = start; i < count && !ret; i++, j++) {
|
|
int fd = fds ? fds[i] : -1;
|
|
ret = vfio_msi_set_vector_signal(vdev, j, fd, msix);
|
|
}
|
|
|
|
if (ret) {
|
|
for (--j; j >= start; j--)
|
|
vfio_msi_set_vector_signal(vdev, j, -1, msix);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_msi_disable(struct vfio_pci_device *vdev, bool msix)
|
|
{
|
|
struct pci_dev *pdev = vdev->pdev;
|
|
int i;
|
|
|
|
vfio_msi_set_block(vdev, 0, vdev->num_ctx, NULL, msix);
|
|
|
|
for (i = 0; i < vdev->num_ctx; i++) {
|
|
vfio_virqfd_disable(&vdev->ctx[i].unmask);
|
|
vfio_virqfd_disable(&vdev->ctx[i].mask);
|
|
}
|
|
|
|
if (msix) {
|
|
pci_disable_msix(vdev->pdev);
|
|
kfree(vdev->msix);
|
|
} else
|
|
pci_disable_msi(pdev);
|
|
|
|
vdev->irq_type = VFIO_PCI_NUM_IRQS;
|
|
vdev->num_ctx = 0;
|
|
kfree(vdev->ctx);
|
|
}
|
|
|
|
/*
|
|
* IOCTL support
|
|
*/
|
|
static int vfio_pci_set_intx_unmask(struct vfio_pci_device *vdev,
|
|
unsigned index, unsigned start,
|
|
unsigned count, uint32_t flags, void *data)
|
|
{
|
|
if (!is_intx(vdev) || start != 0 || count != 1)
|
|
return -EINVAL;
|
|
|
|
if (flags & VFIO_IRQ_SET_DATA_NONE) {
|
|
vfio_pci_intx_unmask(vdev);
|
|
} else if (flags & VFIO_IRQ_SET_DATA_BOOL) {
|
|
uint8_t unmask = *(uint8_t *)data;
|
|
if (unmask)
|
|
vfio_pci_intx_unmask(vdev);
|
|
} else if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
|
|
int32_t fd = *(int32_t *)data;
|
|
if (fd >= 0)
|
|
return vfio_virqfd_enable((void *) vdev,
|
|
vfio_pci_intx_unmask_handler,
|
|
vfio_send_intx_eventfd, NULL,
|
|
&vdev->ctx[0].unmask, fd);
|
|
|
|
vfio_virqfd_disable(&vdev->ctx[0].unmask);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_pci_set_intx_mask(struct vfio_pci_device *vdev,
|
|
unsigned index, unsigned start,
|
|
unsigned count, uint32_t flags, void *data)
|
|
{
|
|
if (!is_intx(vdev) || start != 0 || count != 1)
|
|
return -EINVAL;
|
|
|
|
if (flags & VFIO_IRQ_SET_DATA_NONE) {
|
|
vfio_pci_intx_mask(vdev);
|
|
} else if (flags & VFIO_IRQ_SET_DATA_BOOL) {
|
|
uint8_t mask = *(uint8_t *)data;
|
|
if (mask)
|
|
vfio_pci_intx_mask(vdev);
|
|
} else if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
|
|
return -ENOTTY; /* XXX implement me */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_pci_set_intx_trigger(struct vfio_pci_device *vdev,
|
|
unsigned index, unsigned start,
|
|
unsigned count, uint32_t flags, void *data)
|
|
{
|
|
if (is_intx(vdev) && !count && (flags & VFIO_IRQ_SET_DATA_NONE)) {
|
|
vfio_intx_disable(vdev);
|
|
return 0;
|
|
}
|
|
|
|
if (!(is_intx(vdev) || is_irq_none(vdev)) || start != 0 || count != 1)
|
|
return -EINVAL;
|
|
|
|
if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
|
|
int32_t fd = *(int32_t *)data;
|
|
int ret;
|
|
|
|
if (is_intx(vdev))
|
|
return vfio_intx_set_signal(vdev, fd);
|
|
|
|
ret = vfio_intx_enable(vdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = vfio_intx_set_signal(vdev, fd);
|
|
if (ret)
|
|
vfio_intx_disable(vdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
if (!is_intx(vdev))
|
|
return -EINVAL;
|
|
|
|
if (flags & VFIO_IRQ_SET_DATA_NONE) {
|
|
vfio_send_intx_eventfd(vdev, NULL);
|
|
} else if (flags & VFIO_IRQ_SET_DATA_BOOL) {
|
|
uint8_t trigger = *(uint8_t *)data;
|
|
if (trigger)
|
|
vfio_send_intx_eventfd(vdev, NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_pci_set_msi_trigger(struct vfio_pci_device *vdev,
|
|
unsigned index, unsigned start,
|
|
unsigned count, uint32_t flags, void *data)
|
|
{
|
|
int i;
|
|
bool msix = (index == VFIO_PCI_MSIX_IRQ_INDEX) ? true : false;
|
|
|
|
if (irq_is(vdev, index) && !count && (flags & VFIO_IRQ_SET_DATA_NONE)) {
|
|
vfio_msi_disable(vdev, msix);
|
|
return 0;
|
|
}
|
|
|
|
if (!(irq_is(vdev, index) || is_irq_none(vdev)))
|
|
return -EINVAL;
|
|
|
|
if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
|
|
int32_t *fds = data;
|
|
int ret;
|
|
|
|
if (vdev->irq_type == index)
|
|
return vfio_msi_set_block(vdev, start, count,
|
|
fds, msix);
|
|
|
|
ret = vfio_msi_enable(vdev, start + count, msix);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = vfio_msi_set_block(vdev, start, count, fds, msix);
|
|
if (ret)
|
|
vfio_msi_disable(vdev, msix);
|
|
|
|
return ret;
|
|
}
|
|
|
|
if (!irq_is(vdev, index) || start + count > vdev->num_ctx)
|
|
return -EINVAL;
|
|
|
|
for (i = start; i < start + count; i++) {
|
|
if (!vdev->ctx[i].trigger)
|
|
continue;
|
|
if (flags & VFIO_IRQ_SET_DATA_NONE) {
|
|
eventfd_signal(vdev->ctx[i].trigger, 1);
|
|
} else if (flags & VFIO_IRQ_SET_DATA_BOOL) {
|
|
uint8_t *bools = data;
|
|
if (bools[i - start])
|
|
eventfd_signal(vdev->ctx[i].trigger, 1);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_pci_set_ctx_trigger_single(struct eventfd_ctx **ctx,
|
|
uint32_t flags, void *data)
|
|
{
|
|
int32_t fd = *(int32_t *)data;
|
|
|
|
if (!(flags & VFIO_IRQ_SET_DATA_TYPE_MASK))
|
|
return -EINVAL;
|
|
|
|
/* DATA_NONE/DATA_BOOL enables loopback testing */
|
|
if (flags & VFIO_IRQ_SET_DATA_NONE) {
|
|
if (*ctx)
|
|
eventfd_signal(*ctx, 1);
|
|
return 0;
|
|
} else if (flags & VFIO_IRQ_SET_DATA_BOOL) {
|
|
uint8_t trigger = *(uint8_t *)data;
|
|
if (trigger && *ctx)
|
|
eventfd_signal(*ctx, 1);
|
|
return 0;
|
|
}
|
|
|
|
/* Handle SET_DATA_EVENTFD */
|
|
if (fd == -1) {
|
|
if (*ctx)
|
|
eventfd_ctx_put(*ctx);
|
|
*ctx = NULL;
|
|
return 0;
|
|
} else if (fd >= 0) {
|
|
struct eventfd_ctx *efdctx;
|
|
efdctx = eventfd_ctx_fdget(fd);
|
|
if (IS_ERR(efdctx))
|
|
return PTR_ERR(efdctx);
|
|
if (*ctx)
|
|
eventfd_ctx_put(*ctx);
|
|
*ctx = efdctx;
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int vfio_pci_set_err_trigger(struct vfio_pci_device *vdev,
|
|
unsigned index, unsigned start,
|
|
unsigned count, uint32_t flags, void *data)
|
|
{
|
|
if (index != VFIO_PCI_ERR_IRQ_INDEX)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* We should sanitize start & count, but that wasn't caught
|
|
* originally, so this IRQ index must forever ignore them :-(
|
|
*/
|
|
|
|
return vfio_pci_set_ctx_trigger_single(&vdev->err_trigger, flags, data);
|
|
}
|
|
|
|
static int vfio_pci_set_req_trigger(struct vfio_pci_device *vdev,
|
|
unsigned index, unsigned start,
|
|
unsigned count, uint32_t flags, void *data)
|
|
{
|
|
if (index != VFIO_PCI_REQ_IRQ_INDEX || start != 0 || count != 1)
|
|
return -EINVAL;
|
|
|
|
return vfio_pci_set_ctx_trigger_single(&vdev->req_trigger, flags, data);
|
|
}
|
|
|
|
int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags,
|
|
unsigned index, unsigned start, unsigned count,
|
|
void *data)
|
|
{
|
|
int (*func)(struct vfio_pci_device *vdev, unsigned index,
|
|
unsigned start, unsigned count, uint32_t flags,
|
|
void *data) = NULL;
|
|
|
|
switch (index) {
|
|
case VFIO_PCI_INTX_IRQ_INDEX:
|
|
switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
|
|
case VFIO_IRQ_SET_ACTION_MASK:
|
|
func = vfio_pci_set_intx_mask;
|
|
break;
|
|
case VFIO_IRQ_SET_ACTION_UNMASK:
|
|
func = vfio_pci_set_intx_unmask;
|
|
break;
|
|
case VFIO_IRQ_SET_ACTION_TRIGGER:
|
|
func = vfio_pci_set_intx_trigger;
|
|
break;
|
|
}
|
|
break;
|
|
case VFIO_PCI_MSI_IRQ_INDEX:
|
|
case VFIO_PCI_MSIX_IRQ_INDEX:
|
|
switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
|
|
case VFIO_IRQ_SET_ACTION_MASK:
|
|
case VFIO_IRQ_SET_ACTION_UNMASK:
|
|
/* XXX Need masking support exported */
|
|
break;
|
|
case VFIO_IRQ_SET_ACTION_TRIGGER:
|
|
func = vfio_pci_set_msi_trigger;
|
|
break;
|
|
}
|
|
break;
|
|
case VFIO_PCI_ERR_IRQ_INDEX:
|
|
switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
|
|
case VFIO_IRQ_SET_ACTION_TRIGGER:
|
|
if (pci_is_pcie(vdev->pdev))
|
|
func = vfio_pci_set_err_trigger;
|
|
break;
|
|
}
|
|
break;
|
|
case VFIO_PCI_REQ_IRQ_INDEX:
|
|
switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
|
|
case VFIO_IRQ_SET_ACTION_TRIGGER:
|
|
func = vfio_pci_set_req_trigger;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!func)
|
|
return -ENOTTY;
|
|
|
|
return func(vdev, index, start, count, flags, data);
|
|
}
|