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libqos: add MSI-X callbacks to QVirtioPCIDevice 

The MSI-X vectors are programmed differently in the VIRTIO 1.0 and
Legacy interfaces.  Introduce callbacks so different implementations can
be used depending on the interface version.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20191023100425.12168-13-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2019-10-23 11:04:21 +01:00 committed by Michael S. Tsirkin
parent 1e59a86610
commit 957d8d1d06
2 changed files with 40 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
tests/libqos/virtio-pci.c
View File

@ -281,6 +281,31 @@ const QVirtioBus qvirtio_pci = {
.virtqueue_kick = qvirtio_pci_virtqueue_kick,
};
static void qvirtio_pci_set_config_vector(QVirtioPCIDevice *d, uint16_t entry)
{
uint16_t vector;
qpci_io_writew(d->pdev, d->bar, VIRTIO_MSI_CONFIG_VECTOR, entry);
vector = qpci_io_readw(d->pdev, d->bar, VIRTIO_MSI_CONFIG_VECTOR);
g_assert_cmphex(vector, !=, VIRTIO_MSI_NO_VECTOR);
}
static void qvirtio_pci_set_queue_vector(QVirtioPCIDevice *d, uint16_t vq_idx,
uint16_t entry)
{
uint16_t vector;
qvirtio_pci_queue_select(&d->vdev, vq_idx);
qpci_io_writew(d->pdev, d->bar, VIRTIO_MSI_QUEUE_VECTOR, entry);
vector = qpci_io_readw(d->pdev, d->bar, VIRTIO_MSI_QUEUE_VECTOR);
g_assert_cmphex(vector, !=, VIRTIO_MSI_NO_VECTOR);
}
static const QVirtioPCIMSIXOps qvirtio_pci_msix_ops_legacy = {
.set_config_vector = qvirtio_pci_set_config_vector,
.set_queue_vector = qvirtio_pci_set_queue_vector,
};
void qvirtio_pci_device_enable(QVirtioPCIDevice *d)
{
qpci_device_enable(d->pdev);
@ -295,7 +320,6 @@ void qvirtio_pci_device_disable(QVirtioPCIDevice *d)
void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci,
QGuestAllocator *alloc, uint16_t entry)
{
uint16_t vector;
uint32_t control;
uint64_t off;
@ -321,16 +345,12 @@ void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci,
off + PCI_MSIX_ENTRY_VECTOR_CTRL,
control & ~PCI_MSIX_ENTRY_CTRL_MASKBIT);
qvirtio_pci_queue_select(&d->vdev, vqpci->vq.index);
qpci_io_writew(d->pdev, d->bar, VIRTIO_MSI_QUEUE_VECTOR, entry);
vector = qpci_io_readw(d->pdev, d->bar, VIRTIO_MSI_QUEUE_VECTOR);
g_assert_cmphex(vector, !=, VIRTIO_MSI_NO_VECTOR);
d->msix_ops->set_queue_vector(d, vqpci->vq.index, entry);
}
void qvirtio_pci_set_msix_configuration_vector(QVirtioPCIDevice *d,
QGuestAllocator *alloc, uint16_t entry)
{
uint16_t vector;
uint32_t control;
uint64_t off;
@ -358,9 +378,7 @@ void qvirtio_pci_set_msix_configuration_vector(QVirtioPCIDevice *d,
off + PCI_MSIX_ENTRY_VECTOR_CTRL,
control & ~PCI_MSIX_ENTRY_CTRL_MASKBIT);
qpci_io_writew(d->pdev, d->bar, VIRTIO_MSI_CONFIG_VECTOR, entry);
vector = qpci_io_readw(d->pdev, d->bar, VIRTIO_MSI_CONFIG_VECTOR);
g_assert_cmphex(vector, !=, VIRTIO_MSI_NO_VECTOR);
d->msix_ops->set_config_vector(d, entry);
}
void qvirtio_pci_destructor(QOSGraphObject *obj)
@ -383,6 +401,7 @@ static void qvirtio_pci_init_from_pcidev(QVirtioPCIDevice *dev, QPCIDevice *pci_
dev->vdev.device_type = qpci_config_readw(pci_dev, PCI_SUBSYSTEM_ID);
dev->config_msix_entry = -1;
dev->msix_ops = &qvirtio_pci_msix_ops_legacy;
dev->vdev.bus = &qvirtio_pci;
dev->vdev.big_endian = qvirtio_pci_is_big_endian(dev);

12
tests/libqos/virtio-pci.h
View File

@ -14,16 +14,28 @@
#include "libqos/pci.h"
#include "libqos/qgraph.h"
typedef struct QVirtioPCIMSIXOps QVirtioPCIMSIXOps;
typedef struct QVirtioPCIDevice {
QOSGraphObject obj;
QVirtioDevice vdev;
QPCIDevice *pdev;
QPCIBar bar;
const QVirtioPCIMSIXOps *msix_ops;
uint16_t config_msix_entry;
uint64_t config_msix_addr;
uint32_t config_msix_data;
} QVirtioPCIDevice;
struct QVirtioPCIMSIXOps {
/* Set the Configuration Vector for MSI-X */
void (*set_config_vector)(QVirtioPCIDevice *d, uint16_t entry);
/* Set the Queue Vector for MSI-X */
void (*set_queue_vector)(QVirtioPCIDevice *d, uint16_t vq_idx,
uint16_t entry);
};
typedef struct QVirtQueuePCI {
QVirtQueue vq;
uint16_t msix_entry;