#include <rte_log.h>
#include <rte_pci.h>
#include <rte_bus_pci.h>
-#include <rte_eal_memconfig.h>
#include <rte_malloc.h>
#include <rte_vfio.h>
#include <rte_eal.h>
static int
pci_vfio_setup_interrupts(struct rte_pci_device *dev, int vfio_dev_fd)
{
- char irq_set_buf[sizeof(struct vfio_irq_set) + sizeof(int)];
- struct vfio_irq_set *irq_set;
- enum rte_intr_mode intr_mode;
int i, ret, intr_idx;
- int fd;
+ enum rte_intr_mode intr_mode;
/* default to invalid index */
intr_idx = VFIO_PCI_NUM_IRQS;
/* start from MSI-X interrupt type */
for (i = VFIO_PCI_MSIX_IRQ_INDEX; i >= 0; i--) {
struct vfio_irq_info irq = { .argsz = sizeof(irq) };
+ int fd = -1;
/* skip interrupt modes we don't want */
if (intr_mode != RTE_INTR_MODE_NONE &&
return -1;
}
- /* found a usable interrupt mode */
- if ((irq.flags & VFIO_IRQ_INFO_EVENTFD) != 0)
- break;
-
/* if this vector cannot be used with eventfd, fail if we explicitly
* specified interrupt type, otherwise continue */
- if (intr_mode != RTE_INTR_MODE_NONE) {
- RTE_LOG(ERR, EAL, " interrupt vector does not support eventfd!\n");
+ if ((irq.flags & VFIO_IRQ_INFO_EVENTFD) == 0) {
+ if (intr_mode != RTE_INTR_MODE_NONE) {
+ RTE_LOG(ERR, EAL,
+ " interrupt vector does not support eventfd!\n");
+ return -1;
+ } else
+ continue;
+ }
+
+ /* set up an eventfd for interrupts */
+ fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+ if (fd < 0) {
+ RTE_LOG(ERR, EAL, " cannot set up eventfd, "
+ "error %i (%s)\n", errno, strerror(errno));
return -1;
}
- }
- if (i < 0)
- return -1;
+ dev->intr_handle.fd = fd;
+ dev->intr_handle.vfio_dev_fd = vfio_dev_fd;
- fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, " cannot set up eventfd, error %i (%s)\n",
- errno, strerror(errno));
- return -1;
- }
+ switch (i) {
+ case VFIO_PCI_MSIX_IRQ_INDEX:
+ intr_mode = RTE_INTR_MODE_MSIX;
+ dev->intr_handle.type = RTE_INTR_HANDLE_VFIO_MSIX;
+ break;
+ case VFIO_PCI_MSI_IRQ_INDEX:
+ intr_mode = RTE_INTR_MODE_MSI;
+ dev->intr_handle.type = RTE_INTR_HANDLE_VFIO_MSI;
+ break;
+ case VFIO_PCI_INTX_IRQ_INDEX:
+ intr_mode = RTE_INTR_MODE_LEGACY;
+ dev->intr_handle.type = RTE_INTR_HANDLE_VFIO_LEGACY;
+ break;
+ default:
+ RTE_LOG(ERR, EAL, " unknown interrupt type!\n");
+ return -1;
+ }
- irq_set = (struct vfio_irq_set *)irq_set_buf;
- irq_set->argsz = sizeof(irq_set_buf);
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD|VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = i;
- irq_set->start = 0;
- irq_set->count = 1;
- memcpy(&irq_set->data, &fd, sizeof(int));
- if (ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set) < 0) {
- RTE_LOG(ERR, EAL, " error configuring interrupt\n");
- close(fd);
- return -1;
+ return 0;
}
- dev->intr_handle.fd = fd;
- dev->intr_handle.vfio_dev_fd = vfio_dev_fd;
- if (i == VFIO_PCI_MSIX_IRQ_INDEX)
- dev->intr_handle.type = RTE_INTR_HANDLE_VFIO_MSIX;
- else if (i == VFIO_PCI_MSI_IRQ_INDEX)
- dev->intr_handle.type = RTE_INTR_HANDLE_VFIO_MSI;
- else if (i == VFIO_PCI_INTX_IRQ_INDEX)
- dev->intr_handle.type = RTE_INTR_HANDLE_VFIO_LEGACY;
-
- return 0;
+ /* if we're here, we haven't found a suitable interrupt vector */
+ return -1;
}
#ifdef HAVE_VFIO_DEV_REQ_INTERFACE