From 115b61de80d714833d9e8ba612d11bfc5e1d8aef Mon Sep 17 00:00:00 2001
From: Wangl56 <long.wang2@dell.com>
Date: Wed, 3 Dec 2025 20:02:26 +0800
Subject: [PATCH] Expose iova management and dma_map api in vfio mem utils to
 users

This change is to expose the below APIs to user to let users be able to
leverage them to map the user allocated memory to iova address and
configure it to qat dma engine to avoid none-necessary memory copy when
qat engine transfer data to user memory.
iova_release  -> qae_iova_release
allocate_iova -> qae_allocate_iova
dma_map_slab  -> qae_dma_map_slab
dma_unmap_slab -> qae_dma_unmap_slab
---
 .../user_space/vfio/qae_mem_utils_vfio.c      | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/quickassist/utilities/libusdm_drv/user_space/vfio/qae_mem_utils_vfio.c b/quickassist/utilities/libusdm_drv/user_space/vfio/qae_mem_utils_vfio.c
index de168302..d0c9dd92 100644
--- a/quickassist/utilities/libusdm_drv/user_space/vfio/qae_mem_utils_vfio.c
+++ b/quickassist/utilities/libusdm_drv/user_space/vfio/qae_mem_utils_vfio.c
@@ -222,6 +222,11 @@ void iova_release(uint64_t iova, uint32_t size)
 #endif
 }
 
+void qae_iova_release(uint64_t iova, uint32_t size)
+{
+    iova_release(iova, size);
+}
+
 static int vfio_noiommu_enabled(void)
 {
     int fd, cnt;
@@ -281,6 +286,13 @@ inline int dma_map_slab(const void *virt,
     return ret;
 }
 
+int qae_dma_map_slab(const void *virt,
+                     const uint64_t iova,
+                     const size_t size)
+{
+    return dma_map_slab(virt, iova, size);
+}
+
 inline int dma_unmap_slab(const uint64_t iova, const size_t size)
 {
     int ret = 0;
@@ -304,6 +316,11 @@ inline int dma_unmap_slab(const uint64_t iova, const size_t size)
     return ret;
 }
 
+int qae_dma_unmap_slab(const uint64_t iova, const size_t size)
+{
+    return dma_unmap_slab(iova, size);
+}
+
 static inline void ioctl_free_slab(const int fd, dev_mem_info_t *memInfo)
 {
     UNUSED(fd);
@@ -434,6 +451,11 @@ uint64_t allocate_iova(const uint32_t size, uint32_t alignment)
     return 0;
 }
 
+uint64_t qae_allocate_iova(const uint32_t size, uint32_t alignment)
+{
+    return allocate_iova(size, alignment);
+}
+
 static inline void *mmap_alloc(const size_t size)
 {
     int flags = MAP_ANONYMOUS | MAP_PRIVATE;