[dpdk-dev] [PATCH 18/21 v3] fslmc/bus: add interrupt enabling routine

[Nipun Gupta <nipun.gupta@nxp.com>]

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
 drivers/bus/fslmc/fslmc_vfio.c | 34 ++++++++++++++++++++++++++++++++++
 drivers/bus/fslmc/fslmc_vfio.h |  3 +++
 2 files changed, 37 insertions(+)

diff --git a/drivers/bus/fslmc/fslmc_vfio.c b/drivers/bus/fslmc/fslmc_vfio.c
index 6ebf779..d8e3add 100644
--- a/drivers/bus/fslmc/fslmc_vfio.c
+++ b/drivers/bus/fslmc/fslmc_vfio.c
@@ -359,6 +359,40 @@ static int64_t vfio_map_mcp_obj(struct fslmc_vfio_group *group, char *mcp_obj)
 	}
 }
 
+#define IRQ_SET_BUF_LEN  (sizeof(struct vfio_irq_set) + sizeof(int))
+
+int rte_dpaa2_intr_enable(struct rte_intr_handle *intr_handle,
+			  uint32_t index)
+{
+	struct vfio_irq_set *irq_set;
+	char irq_set_buf[IRQ_SET_BUF_LEN];
+	int *fd_ptr, fd, ret;
+
+	/* Prepare vfio_irq_set structure and SET the IRQ in VFIO */
+	/* Give the eventfd to VFIO */
+	fd = eventfd(0, 0);
+	irq_set = (struct vfio_irq_set *)irq_set_buf;
+	irq_set->argsz = sizeof(irq_set_buf);
+	irq_set->count = 1;
+	irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
+			 VFIO_IRQ_SET_ACTION_TRIGGER;
+	irq_set->index = index;
+	irq_set->start = 0;
+	fd_ptr = (int *)&irq_set->data;
+	*fd_ptr = fd;
+
+	ret = ioctl(intr_handle->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+	if (ret < 0) {
+		FSLMC_VFIO_LOG(ERR, "Unable to set IRQ in VFIO, ret: %d\n",
+			       ret);
+		return -1;
+	}
+
+	/* Set the FD and update the flags */
+	intr_handle->fd = fd;
+	return 0;
+}
+
 /* Following function shall fetch total available list of MC devices
  * from VFIO container & populate private list of devices and other
  * data structures
diff --git a/drivers/bus/fslmc/fslmc_vfio.h b/drivers/bus/fslmc/fslmc_vfio.h
index 7c725f4..ebca2b0 100644
--- a/drivers/bus/fslmc/fslmc_vfio.h
+++ b/drivers/bus/fslmc/fslmc_vfio.h
@@ -90,6 +90,9 @@ int vfio_dmamap_mem_region(
 	uint64_t iova,
 	uint64_t size);
 
+int rte_dpaa2_intr_enable(struct rte_intr_handle *intr_handle,
+			  uint32_t index);
+
 int fslmc_vfio_setup_group(void);
 int fslmc_vfio_process_group(void);
 int rte_fslmc_vfio_dmamap(void);
-- 
1.9.1