[dpdk-dev] [PATCH 05/14] hpa region

[Huawei Xie <huawei.xie@intel.com>]

add hpa(host physical address) region generation/destroy logic.
gpa<->hpa memory translation regions are generated at new_device, when a
virtio device is ready for packet processing.

Signed-off-by: Huawei Xie <huawei.xie@intel.com>
---
 examples/vhost/main.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 03a0f48..e161282 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -2489,6 +2489,7 @@ destroy_device (volatile struct virtio_net *dev)
 			dev->device_fh);
 
 		mbuf_destroy_zcp(vpool);
+		rte_free(vdev->regions_hpa);
 	}
 	rte_free(vdev);
 
@@ -2652,7 +2653,7 @@ new_device (struct virtio_net *dev)
 	int lcore, core_add = 0;
 	uint32_t device_num_min = num_devices;
 	struct vhost_dev *vdev;
-	
+	uint32_t regionidx;
 
 	vdev = rte_zmalloc("vhost device", sizeof(*vdev), CACHE_LINE_SIZE);
 	if (vdev == NULL) {
@@ -2663,12 +2664,49 @@ new_device (struct virtio_net *dev)
 	vdev->dev = dev;
 	dev->priv = vdev;
 
+	if (zero_copy) {
+		vdev->nregions_hpa = dev->mem->nregions;
+		for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
+			vdev->nregions_hpa
+				+= check_hpa_regions(
+					dev->mem->regions[regionidx].guest_phys_address
+					+ dev->mem->regions[regionidx].address_offset,
+					dev->mem->regions[regionidx].memory_size);
+
+		}
+
+		vdev->regions_hpa = (struct virtio_memory_regions_hpa *) rte_zmalloc("vhost hpa region",
+			sizeof(struct virtio_memory_regions_hpa) * vdev->nregions_hpa,
+			CACHE_LINE_SIZE);
+		if (vdev->regions_hpa == NULL) {
+			RTE_LOG(ERR, VHOST_CONFIG, "Cannot allocate memory for hpa region\n");
+			rte_free(vdev);
+			return -1;
+		}
+
+
+		if (fill_hpa_memory_regions(
+			vdev->regions_hpa, dev->mem
+			) != vdev->nregions_hpa) {
+
+			RTE_LOG(ERR, VHOST_CONFIG,
+				"hpa memory regions number mismatch: "
+				"[%d]\n", vdev->nregions_hpa);
+			rte_free(vdev->regions_hpa);
+			rte_free(vdev);
+			return -1;
+		}
+	}
+
+
 	/* Add device to main ll */
 	ll_dev = get_data_ll_free_entry(&ll_root_free);
 	if (ll_dev == NULL) {
 		RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in linked list. Device limit "
 			"of %d devices per core has been reached\n",
 			dev->device_fh, num_devices);
+		if (vdev->regions_hpa)
+			rte_free(vdev->regions_hpa);
 		rte_free(vdev);
 		return -1;
 	}
@@ -2721,6 +2759,7 @@ new_device (struct virtio_net *dev)
 				dev->device_fh, vdev->vmdq_rx_q);
 
 			mbuf_destroy_zcp(vpool);
+			rte_free(vdev->regions_hpa);
 			rte_free(vdev);
 			return -1;
 		}
@@ -2743,6 +2782,7 @@ new_device (struct virtio_net *dev)
 			}
 
 			mbuf_destroy_zcp(vpool);
+			rte_free(vdev->regions_hpa);
 			rte_free(vdev);
 			return -1;
 		}
@@ -2767,6 +2807,8 @@ new_device (struct virtio_net *dev)
 		RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Failed to add device to data core\n", dev->device_fh);
 		vdev->ready = DEVICE_SAFE_REMOVE;
 		destroy_device(dev);
+		if (vdev->regions_hpa)
+			rte_free(vdev->regions_hpa);
 		rte_free(vdev);
 		return -1;
 	}
-- 
1.8.1.4