[PATCH v4 1/2] vhost: fix field naming in guest page struct

[xuan.ding@intel.com]

From: Xuan Ding <xuan.ding@intel.com>

This patch renames the host_phys_addr to host_iova in guest_page
struct. The host_phys_addr is iova, it depends on the DPDK
IOVA mode.

Fixes: e246896178e6 ("vhost: get guest/host physical address mappings")
Cc: stable@dpdk.org

Signed-off-by: Xuan Ding <xuan.ding@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/vhost/vhost.h      | 10 +++++-----
 lib/vhost/vhost_user.c | 20 ++++++++++----------
 lib/vhost/virtio_net.c | 11 ++++++-----
 3 files changed, 21 insertions(+), 20 deletions(-)

diff --git a/lib/vhost/vhost.h b/lib/vhost/vhost.h
index 1c2ee29600..ccac679c25 100644
--- a/lib/vhost/vhost.h
+++ b/lib/vhost/vhost.h
@@ -426,7 +426,7 @@ struct vring_packed_desc_event {
 
 struct guest_page {
 	uint64_t guest_phys_addr;
-	uint64_t host_phys_addr;
+	uint64_t host_iova;
 	uint64_t size;
 };
 
@@ -689,13 +689,13 @@ gpa_to_first_hpa(struct virtio_net *dev, uint64_t gpa,
 			if (gpa + gpa_size <=
 					page->guest_phys_addr + page->size) {
 				return gpa - page->guest_phys_addr +
-					page->host_phys_addr;
+					page->host_iova;
 			} else if (gpa < page->guest_phys_addr +
 						page->size) {
 				*hpa_size = page->guest_phys_addr +
 					page->size - gpa;
 				return gpa - page->guest_phys_addr +
-					page->host_phys_addr;
+					page->host_iova;
 			}
 		}
 	} else {
@@ -706,13 +706,13 @@ gpa_to_first_hpa(struct virtio_net *dev, uint64_t gpa,
 				if (gpa + gpa_size <=
 					page->guest_phys_addr + page->size) {
 					return gpa - page->guest_phys_addr +
-						page->host_phys_addr;
+						page->host_iova;
 				} else if (gpa < page->guest_phys_addr +
 							page->size) {
 					*hpa_size = page->guest_phys_addr +
 						page->size - gpa;
 					return gpa - page->guest_phys_addr +
-						page->host_phys_addr;
+						page->host_iova;
 				}
 			}
 		}
diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 1d3f89afd8..066adfb464 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -988,7 +988,7 @@ vhost_user_set_vring_base(struct virtio_net **pdev,
 
 static int
 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
-		   uint64_t host_phys_addr, uint64_t size)
+		   uint64_t host_iova, uint64_t size)
 {
 	struct guest_page *page, *last_page;
 	struct guest_page *old_pages;
@@ -1009,7 +1009,7 @@ add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
 	if (dev->nr_guest_pages > 0) {
 		last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
 		/* merge if the two pages are continuous */
-		if (host_phys_addr == last_page->host_phys_addr +
+		if (host_iova == last_page->host_iova +
 				      last_page->size) {
 			last_page->size += size;
 			return 0;
@@ -1018,7 +1018,7 @@ add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
 
 	page = &dev->guest_pages[dev->nr_guest_pages++];
 	page->guest_phys_addr = guest_phys_addr;
-	page->host_phys_addr  = host_phys_addr;
+	page->host_iova  = host_iova;
 	page->size = size;
 
 	return 0;
@@ -1031,14 +1031,14 @@ add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
 	uint64_t reg_size = reg->size;
 	uint64_t host_user_addr  = reg->host_user_addr;
 	uint64_t guest_phys_addr = reg->guest_phys_addr;
-	uint64_t host_phys_addr;
+	uint64_t host_iova;
 	uint64_t size;
 
-	host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
+	host_iova = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
 	size = page_size - (guest_phys_addr & (page_size - 1));
 	size = RTE_MIN(size, reg_size);
 
-	if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
+	if (add_one_guest_page(dev, guest_phys_addr, host_iova, size) < 0)
 		return -1;
 
 	host_user_addr  += size;
@@ -1047,9 +1047,9 @@ add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
 
 	while (reg_size > 0) {
 		size = RTE_MIN(reg_size, page_size);
-		host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
+		host_iova = rte_mem_virt2iova((void *)(uintptr_t)
 						  host_user_addr);
-		if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
+		if (add_one_guest_page(dev, guest_phys_addr, host_iova,
 				size) < 0)
 			return -1;
 
@@ -1082,8 +1082,8 @@ dump_guest_pages(struct virtio_net *dev)
 				dev->ifname, i);
 		VHOST_LOG_CONFIG(INFO, "(%s)\tguest_phys_addr: %" PRIx64 "\n",
 				dev->ifname, page->guest_phys_addr);
-		VHOST_LOG_CONFIG(INFO, "(%s)\thost_phys_addr : %" PRIx64 "\n",
-				dev->ifname, page->host_phys_addr);
+		VHOST_LOG_CONFIG(INFO, "(%s)\thost_iova : %" PRIx64 "\n",
+				dev->ifname, page->host_iova);
 		VHOST_LOG_CONFIG(INFO, "(%s)\tsize           : %" PRIx64 "\n",
 				dev->ifname, page->size);
 	}
diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 886e076b28..5f432b0d77 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -1004,20 +1004,21 @@ async_mbuf_to_desc_seg(struct virtio_net *dev, struct vhost_virtqueue *vq,
 	struct vhost_async *async = vq->async;
 	uint64_t mapped_len;
 	uint32_t buf_offset = 0;
-	void *hpa;
+	void *host_iova;
 
 	while (cpy_len) {
-		hpa = (void *)(uintptr_t)gpa_to_first_hpa(dev,
+		host_iova = (void *)(uintptr_t)gpa_to_first_hpa(dev,
 				buf_iova + buf_offset, cpy_len, &mapped_len);
-		if (unlikely(!hpa)) {
-			VHOST_LOG_DATA(ERR, "(%s) %s: failed to get hpa.\n", dev->ifname, __func__);
+		if (unlikely(!host_iova)) {
+			VHOST_LOG_DATA(ERR, "(%s) %s: failed to get host iova.\n",
+				       dev->ifname, __func__);
 			return -1;
 		}
 
 		if (unlikely(async_iter_add_iovec(dev, async,
 						(void *)(uintptr_t)rte_pktmbuf_iova_offset(m,
 							mbuf_offset),
-						hpa, (size_t)mapped_len)))
+						host_iova, (size_t)mapped_len)))
 			return -1;
 
 		cpy_len -= (uint32_t)mapped_len;
-- 
2.17.1