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vfio: add request notifier interrupt

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Add a new req notifier in eal interrupt for enable vfio hotplug.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
This commit is contained in:
Jeff Guo 2018-10-04 14:44:40 +08:00 committed by Thomas Monjalon
parent 2049c5113f
commit 0eb8a1c4c7
2 changed files with 72 additions and 0 deletions
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1
lib/librte_eal/common/include/rte_eal_interrupts.h
View File

@ -35,6 +35,7 @@ enum rte_intr_handle_type {
RTE_INTR_HANDLE_EXT, /**< external handler */
RTE_INTR_HANDLE_VDEV, /**< virtual device */
RTE_INTR_HANDLE_DEV_EVENT, /**< device event handle */
RTE_INTR_HANDLE_VFIO_REQ, /**< VFIO request handle */
RTE_INTR_HANDLE_MAX /**< count of elements */
};

71
lib/librte_eal/linuxapp/eal/eal_interrupts.c
View File

@ -308,6 +308,64 @@ vfio_disable_msix(const struct rte_intr_handle *intr_handle) {
return ret;
}
/* enable req notifier */
static int
vfio_enable_req(const struct rte_intr_handle *intr_handle)
{
int len, ret;
char irq_set_buf[IRQ_SET_BUF_LEN];
struct vfio_irq_set *irq_set;
int *fd_ptr;
len = sizeof(irq_set_buf);
irq_set = (struct vfio_irq_set *) irq_set_buf;
irq_set->argsz = len;
irq_set->count = 1;
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
VFIO_IRQ_SET_ACTION_TRIGGER;
irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
irq_set->start = 0;
fd_ptr = (int *) &irq_set->data;
*fd_ptr = intr_handle->fd;
ret = ioctl(intr_handle->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
if (ret) {
RTE_LOG(ERR, EAL, "Error enabling req interrupts for fd %d\n",
intr_handle->fd);
return -1;
}
return 0;
}
/* disable req notifier */
static int
vfio_disable_req(const struct rte_intr_handle *intr_handle)
{
struct vfio_irq_set *irq_set;
char irq_set_buf[IRQ_SET_BUF_LEN];
int len, ret;
len = sizeof(struct vfio_irq_set);
irq_set = (struct vfio_irq_set *) irq_set_buf;
irq_set->argsz = len;
irq_set->count = 0;
irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
irq_set->start = 0;
ret = ioctl(intr_handle->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
if (ret)
RTE_LOG(ERR, EAL, "Error disabling req interrupts for fd %d\n",
intr_handle->fd);
return ret;
}
#endif
static int
@ -556,6 +614,10 @@ rte_intr_enable(const struct rte_intr_handle *intr_handle)
if (vfio_enable_intx(intr_handle))
return -1;
break;
case RTE_INTR_HANDLE_VFIO_REQ:
if (vfio_enable_req(intr_handle))
return -1;
break;
#endif
/* not used at this moment */
case RTE_INTR_HANDLE_DEV_EVENT:
@ -606,6 +668,11 @@ rte_intr_disable(const struct rte_intr_handle *intr_handle)
if (vfio_disable_intx(intr_handle))
return -1;
break;
case RTE_INTR_HANDLE_VFIO_REQ:
if (vfio_disable_req(intr_handle))
return -1;
break;
#endif
/* not used at this moment */
case RTE_INTR_HANDLE_DEV_EVENT:
@ -682,6 +749,10 @@ eal_intr_process_interrupts(struct epoll_event *events, int nfds)
bytes_read = 0;
call = true;
break;
case RTE_INTR_HANDLE_VFIO_REQ:
bytes_read = 0;
call = true;
break;
default:
bytes_read = 1;
break;