The patch assigns event fds to each vfio msix interrupt vector by ioctl. Signed-off-by: Danny Zhou <danny.zhou at intel.com> Signed-off-by: Cunming Liang <cunming.liang at intel.com> --- v14 changes - per-patch basis ABI compatibility rework - reword commit comments
v8 changes - move eventfd creation out of the setup_interrupts to a standalone function v7 changes - cleanup unnecessary code change - split event and intr operation to other patches lib/librte_eal/linuxapp/eal/eal_interrupts.c | 56 ++++++++++------------------ 1 file changed, 20 insertions(+), 36 deletions(-) diff --git a/lib/librte_eal/linuxapp/eal/eal_interrupts.c b/lib/librte_eal/linuxapp/eal/eal_interrupts.c index cca2efd..b18ab86 100644 --- a/lib/librte_eal/linuxapp/eal/eal_interrupts.c +++ b/lib/librte_eal/linuxapp/eal/eal_interrupts.c @@ -128,6 +128,9 @@ static pthread_t intr_thread; #ifdef VFIO_PRESENT #define IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + sizeof(int)) +/* irq set buffer length for queue interrupts and LSC interrupt */ +#define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \ + sizeof(int) * (RTE_MAX_RXTX_INTR_VEC_ID + 1)) /* enable legacy (INTx) interrupts */ static int @@ -245,23 +248,6 @@ vfio_enable_msi(struct rte_intr_handle *intr_handle) { intr_handle->fd); return -1; } - - /* manually trigger interrupt to enable it */ - memset(irq_set, 0, len); - len = sizeof(struct vfio_irq_set); - irq_set->argsz = len; - irq_set->count = 1; - irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER; - irq_set->index = VFIO_PCI_MSI_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 triggering MSI interrupts for fd %d\n", - intr_handle->fd); - return -1; - } return 0; } @@ -294,7 +280,7 @@ vfio_disable_msi(struct rte_intr_handle *intr_handle) { static int vfio_enable_msix(struct rte_intr_handle *intr_handle) { int len, ret; - char irq_set_buf[IRQ_SET_BUF_LEN]; + char irq_set_buf[MSIX_IRQ_SET_BUF_LEN]; struct vfio_irq_set *irq_set; int *fd_ptr; @@ -302,12 +288,26 @@ vfio_enable_msix(struct rte_intr_handle *intr_handle) { irq_set = (struct vfio_irq_set *) irq_set_buf; irq_set->argsz = len; +#ifdef RTE_NEXT_ABI + if (!intr_handle->max_intr) + intr_handle->max_intr = 1; + else if (intr_handle->max_intr > RTE_MAX_RXTX_INTR_VEC_ID) + intr_handle->max_intr = RTE_MAX_RXTX_INTR_VEC_ID + 1; + + irq_set->count = intr_handle->max_intr; +#else irq_set->count = 1; +#endif irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER; irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX; irq_set->start = 0; fd_ptr = (int *) &irq_set->data; - *fd_ptr = intr_handle->fd; +#ifdef RTE_NEXT_ABI + memcpy(fd_ptr, intr_handle->efds, sizeof(intr_handle->efds)); + fd_ptr[intr_handle->max_intr - 1] = intr_handle->fd; +#else + fd_ptr[0] = intr_handle->fd; +#endif ret = ioctl(intr_handle->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set); @@ -317,22 +317,6 @@ vfio_enable_msix(struct rte_intr_handle *intr_handle) { return -1; } - /* manually trigger interrupt to enable it */ - memset(irq_set, 0, len); - len = sizeof(struct vfio_irq_set); - irq_set->argsz = len; - irq_set->count = 1; - irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER; - irq_set->index = VFIO_PCI_MSIX_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 triggering MSI-X interrupts for fd %d\n", - intr_handle->fd); - return -1; - } return 0; } @@ -340,7 +324,7 @@ vfio_enable_msix(struct rte_intr_handle *intr_handle) { static int vfio_disable_msix(struct rte_intr_handle *intr_handle) { struct vfio_irq_set *irq_set; - char irq_set_buf[IRQ_SET_BUF_LEN]; + char irq_set_buf[MSIX_IRQ_SET_BUF_LEN]; int len, ret; len = sizeof(struct vfio_irq_set); -- 1.8.1.4