diff --git a/.gitignore b/.gitignore
index ba334df..c3d3d00 100644
--- a/.gitignore
+++ b/.gitignore
@@ -60,4 +60,6 @@
 /test-suite.log
 /test/*.gcda
 /test/*.gcno
-/test/libpldm_fileio_test
+/test/libpldmoem_fileio_test
+/test/libpldmoemresponder_fileio_test
+
diff --git a/libpldmresponder/Makefile.am b/libpldmresponder/Makefile.am
index 597cbd3..c043c8b 100644
--- a/libpldmresponder/Makefile.am
+++ b/libpldmresponder/Makefile.am
@@ -7,4 +7,4 @@
 	../libpldm/libpldmoem.la
 libpldmoemresponder_la_LDFLAGS = \
 	-version-info 1:0:0 -shared \
-        -lstdc++fs
+	-lstdc++fs
diff --git a/libpldmresponder/file_io.cpp b/libpldmresponder/file_io.cpp
index ed043c6..06d683b 100644
--- a/libpldmresponder/file_io.cpp
+++ b/libpldmresponder/file_io.cpp
@@ -40,8 +40,8 @@
 
 constexpr auto xdmaDev = "/dev/xdma";
 
-int transferDataHost(const fs::path& path, uint32_t offset, uint32_t length,
-                     uint64_t address, bool upstream)
+int DMA::transferDataHost(const fs::path& path, uint32_t offset,
+                          uint32_t length, uint64_t address, bool upstream)
 {
     static const size_t pageSize = getpagesize();
     uint32_t numPages = length / pageSize;
@@ -126,38 +126,6 @@
 
 } // namespace dma
 
-void transferAll(uint8_t command, fs::path& path, uint32_t offset,
-                 uint32_t length, uint64_t address, bool upstream,
-                 pldm_msg* response)
-{
-    uint32_t origLength = length;
-
-    while (length > dma::maxSize)
-    {
-        auto rc = dma::transferDataHost(path, offset, dma::maxSize, address,
-                                        upstream);
-        if (rc < 0)
-        {
-            encode_rw_file_memory_resp(0, command, PLDM_ERROR, 0, response);
-            return;
-        }
-
-        offset += dma::maxSize;
-        length -= dma::maxSize;
-        address += dma::maxSize;
-    }
-
-    auto rc = dma::transferDataHost(path, offset, length, address, upstream);
-    if (rc < 0)
-    {
-        encode_rw_file_memory_resp(0, command, PLDM_ERROR, 0, response);
-        return;
-    }
-
-    encode_rw_file_memory_resp(0, command, PLDM_SUCCESS, origLength, response);
-    return;
-}
-
 void readFileIntoMemory(const uint8_t* request, size_t payloadLength,
                         pldm_msg* response)
 {
@@ -209,8 +177,10 @@
         return;
     }
 
-    transferAll(PLDM_READ_FILE_INTO_MEMORY, path, offset, length, address, true,
-                response);
+    using namespace dma;
+    DMA intf;
+    transferAll<DMA>(&intf, PLDM_READ_FILE_INTO_MEMORY, path, offset, length,
+                     address, true, response);
 }
 
 void writeFileFromMemory(const uint8_t* request, size_t payloadLength,
@@ -259,8 +229,10 @@
         return;
     }
 
-    transferAll(PLDM_WRITE_FILE_FROM_MEMORY, path, offset, length, address,
-                false, response);
+    using namespace dma;
+    DMA intf;
+    transferAll<DMA>(&intf, PLDM_WRITE_FILE_FROM_MEMORY, path, offset, length,
+                     address, false, response);
 }
 
 } // namespace responder
diff --git a/libpldmresponder/file_io.hpp b/libpldmresponder/file_io.hpp
index ae475b9..ea3a932 100644
--- a/libpldmresponder/file_io.hpp
+++ b/libpldmresponder/file_io.hpp
@@ -51,8 +51,6 @@
 
 } // namespace utils
 
-namespace fs = std::filesystem;
-
 namespace dma
 {
 
@@ -62,20 +60,34 @@
 // 16MB - 4096B (16773120 bytes) is the maximum data size of DMA transfer
 constexpr size_t maxSize = (16 * 1024 * 1024) - 4096;
 
-/** @brief API to transfer data between BMC and host using DMA
+namespace fs = std::filesystem;
+
+/**
+ * @class DMA
  *
- * @param[in] path     - pathname of the file to transfer data from or to
- * @param[in] offset   - offset in the file
- * @param[in] length   - length of the data to transfer
- * @param[in] address  - DMA address on the host
- * @param[in] upstream - indicates directon of the transfer; true indicates
- *                       transfer to the host
+ * Expose API to initiate transfer of data by DMA
  *
- * @return             - returns 0 on success, negative errno on failure
+ * This class only exposes the public API transferDataHost to transfer data
+ * between BMC and host using DMA. This allows for mocking the transferDataHost
+ * for unit testing purposes.
  */
-int transferDataHost(const fs::path& path, uint32_t offset, uint32_t length,
-                     uint64_t address, bool upstream);
-} // namespace dma
+class DMA
+{
+  public:
+    /** @brief API to transfer data between BMC and host using DMA
+     *
+     * @param[in] path     - pathname of the file to transfer data from or to
+     * @param[in] offset   - offset in the file
+     * @param[in] length   - length of the data to transfer
+     * @param[in] address  - DMA address on the host
+     * @param[in] upstream - indicates direction of the transfer; true indicates
+     *                       transfer to the host
+     *
+     * @return returns 0 on success, negative errno on failure
+     */
+    int transferDataHost(const fs::path& path, uint32_t offset, uint32_t length,
+                         uint64_t address, bool upstream);
+};
 
 /** @brief Transfer the data between BMC and host using DMA.
  *
@@ -83,6 +95,8 @@
  *  and the requested length is broken down into multiple DMA operations if the
  *  length exceed max size.
  *
+ * @tparam[in] T - DMA interface type
+ * @param[in] intf - interface passed to invoke DMA transfer
  * @param[in] command  - PLDM command
  * @param[in] path     - pathname of the file to transfer data from or to
  * @param[in] offset   - offset in the file
@@ -92,9 +106,41 @@
  *                       transfer to the host
  * @param[out] response - response message location
  */
-void transferAll(uint8_t command, fs::path& path, uint32_t offset,
-                 uint32_t length, uint64_t address, bool upstream,
-                 pldm_msg* response);
+
+template <class DMAInterface>
+void transferAll(DMAInterface* intf, uint8_t command, fs::path& path,
+                 uint32_t offset, uint32_t length, uint64_t address,
+                 bool upstream, pldm_msg* response)
+{
+    uint32_t origLength = length;
+
+    while (length > dma::maxSize)
+    {
+        auto rc = intf->transferDataHost(path, offset, dma::maxSize, address,
+                                         upstream);
+        if (rc < 0)
+        {
+            encode_rw_file_memory_resp(0, command, PLDM_ERROR, 0, response);
+            return;
+        }
+
+        offset += dma::maxSize;
+        length -= dma::maxSize;
+        address += dma::maxSize;
+    }
+
+    auto rc = intf->transferDataHost(path, offset, length, address, upstream);
+    if (rc < 0)
+    {
+        encode_rw_file_memory_resp(0, command, PLDM_ERROR, 0, response);
+        return;
+    }
+
+    encode_rw_file_memory_resp(0, command, PLDM_SUCCESS, origLength, response);
+    return;
+}
+
+} // namespace dma
 
 /** @brief Handler for readFileIntoMemory command
  *
diff --git a/test/Makefile.am b/test/Makefile.am
index f854cec..70da63a 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -3,12 +3,14 @@
 TESTS = $(check_PROGRAMS)
 
 check_PROGRAMS = \
-        libpldm_fileio_test
+	libpldmoem_fileio_test \
+	libpldmoemresponder_fileio_test
 
 test_cppflags = \
 	-Igtest \
 	$(GTEST_CPPFLAGS) \
-	$(AM_CPPFLAGS)
+	$(AM_CPPFLAGS) \
+	$(PHOSPHOR_LOGGING_CFLAGS)
 
 test_cxxflags = \
 	$(PTHREAD_CFLAGS)
@@ -17,11 +19,25 @@
 	-lgtest_main \
 	-lgtest \
 	$(PTHREAD_LIBS) \
-	$(OESDK_TESTCASE_FLAGS)
+	$(OESDK_TESTCASE_FLAGS) \
+	$(PHOSPHOR_LOGGING_LIBS) \
+	-lstdc++fs \
+	-lgmock
 
-libpldm_fileio_test_CPPFLAGS = $(test_cppflags)
-libpldm_fileio_test_CXXFLAGS = $(test_cxxflags)
-libpldm_fileio_test_LDFLAGS = $(test_ldflags)
-libpldm_fileio_test_LDADD = $(top_builddir)/libpldm/base.o \
-                            $(top_builddir)/libpldm/file_io.o
-libpldm_fileio_test_SOURCES = libpldm_fileio_test.cpp
+libpldmoem_fileio_test_CPPFLAGS = $(test_cppflags)
+libpldmoem_fileio_test_CXXFLAGS = $(test_cxxflags)
+libpldmoem_fileio_test_LDFLAGS = $(test_ldflags)
+libpldmoem_fileio_test_LDADD = \
+	$(top_builddir)/libpldm/base.o \
+	$(top_builddir)/libpldm/file_io.o
+libpldmoem_fileio_test_SOURCES = libpldm_fileio_test.cpp
+
+libpldmoemresponder_fileio_test_CPPFLAGS = $(test_cppflags)
+libpldmoemresponder_fileio_test_CXXFLAGS = $(test_cxxflags)
+libpldmoemresponder_fileio_test_LDFLAGS = $(test_ldflags)
+libpldmoemresponder_fileio_test_LDADD = \
+	$(top_builddir)/libpldm/base.o \
+	$(top_builddir)/libpldm/file_io.o \
+	$(top_builddir)/libpldmresponder/file_io.o
+libpldmoemresponder_fileio_test_SOURCES = libpldmresponder_fileio_test.cpp
+
diff --git a/test/libpldmresponder_fileio_test.cpp b/test/libpldmresponder_fileio_test.cpp
new file mode 100644
index 0000000..93f5844
--- /dev/null
+++ b/test/libpldmresponder_fileio_test.cpp
@@ -0,0 +1,193 @@
+#include "libpldmresponder/file_io.hpp"
+
+#include "libpldm/base.h"
+#include "libpldm/file_io.h"
+
+#include <gmock/gmock-matchers.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#define SD_JOURNAL_SUPPRESS_LOCATION
+
+#include <systemd/sd-journal.h>
+
+std::vector<std::string> logs;
+
+extern "C" {
+
+int sd_journal_send(const char* format, ...)
+{
+    logs.push_back(format);
+    return 0;
+}
+
+int sd_journal_send_with_location(const char* file, const char* line,
+                                  const char* func, const char* format, ...)
+{
+    logs.push_back(format);
+    return 0;
+}
+}
+
+namespace pldm
+{
+
+namespace responder
+{
+
+namespace dma
+{
+
+class MockDMA
+{
+  public:
+    MOCK_METHOD5(transferDataHost,
+                 int(const fs::path& file, uint32_t offset, uint32_t length,
+                     uint64_t address, bool upstream));
+};
+
+} // namespace dma
+} // namespace responder
+} // namespace pldm
+using namespace pldm::responder;
+using ::testing::_;
+using ::testing::Return;
+
+TEST(TransferDataHost, GoodPath)
+{
+    using namespace pldm::responder::dma;
+
+    MockDMA dmaObj;
+    std::array<uint8_t, sizeof(pldm_msg_hdr) + PLDM_RW_FILE_MEM_RESP_BYTES>
+        responseMsg{};
+    pldm_msg* response = reinterpret_cast<pldm_msg*>(responseMsg.data());
+    fs::path path("");
+
+    // Minimum length of 16 and expect transferDataHost to be called once
+    // returns the default value of 0 (the return type of transferDataHost is
+    // int, the default value for int is 0)
+    uint32_t length = minSize;
+    EXPECT_CALL(dmaObj, transferDataHost(path, 0, length, 0, true)).Times(1);
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, true, response);
+    ASSERT_EQ(response->payload[0], PLDM_SUCCESS);
+    ASSERT_EQ(0, memcmp(response->payload + sizeof(response->payload[0]),
+                        &length, sizeof(length)));
+
+    // maxsize of DMA
+    length = maxSize;
+    EXPECT_CALL(dmaObj, transferDataHost(path, 0, length, 0, true)).Times(1);
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, true, response);
+    ASSERT_EQ(response->payload[0], PLDM_SUCCESS);
+    ASSERT_EQ(0, memcmp(response->payload + sizeof(response->payload[0]),
+                        &length, sizeof(length)));
+
+    // length greater than maxsize of DMA
+    length = maxSize + minSize;
+    EXPECT_CALL(dmaObj, transferDataHost(path, 0, maxSize, 0, true)).Times(1);
+    EXPECT_CALL(dmaObj, transferDataHost(path, maxSize, minSize, maxSize, true))
+        .Times(1);
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, true, response);
+    ASSERT_EQ(response->payload[0], PLDM_SUCCESS);
+    ASSERT_EQ(0, memcmp(response->payload + sizeof(response->payload[0]),
+                        &length, sizeof(length)));
+
+    // length greater than 2*maxsize of DMA
+    length = 3 * maxSize;
+    EXPECT_CALL(dmaObj, transferDataHost(_, _, _, _, true)).Times(3);
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, true, response);
+    ASSERT_EQ(response->payload[0], PLDM_SUCCESS);
+    ASSERT_EQ(0, memcmp(response->payload + sizeof(response->payload[0]),
+                        &length, sizeof(length)));
+
+    // check for downstream(copy data from host to BMC) parameter
+    length = minSize;
+    EXPECT_CALL(dmaObj, transferDataHost(path, 0, length, 0, false)).Times(1);
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, false, response);
+    ASSERT_EQ(response->payload[0], PLDM_SUCCESS);
+    ASSERT_EQ(0, memcmp(response->payload + sizeof(response->payload[0]),
+                        &length, sizeof(length)));
+}
+
+TEST(TransferDataHost, BadPath)
+{
+    using namespace pldm::responder::dma;
+
+    MockDMA dmaObj;
+    std::array<uint8_t, sizeof(pldm_msg_hdr) + PLDM_RW_FILE_MEM_RESP_BYTES>
+        responseMsg{};
+    pldm_msg* response = reinterpret_cast<pldm_msg*>(responseMsg.data());
+    fs::path path("");
+
+    // Minimum length of 16 and transferDataHost returning a negative errno
+    uint32_t length = minSize;
+    EXPECT_CALL(dmaObj, transferDataHost(_, _, _, _, _)).WillOnce(Return(-1));
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, true, response);
+    ASSERT_EQ(response->payload[0], PLDM_ERROR);
+
+    // length greater than maxsize of DMA and transferDataHost returning a
+    // negative errno
+    length = maxSize + minSize;
+    EXPECT_CALL(dmaObj, transferDataHost(_, _, _, _, _)).WillOnce(Return(-1));
+    transferAll<MockDMA>(&dmaObj, PLDM_READ_FILE_INTO_MEMORY, path, 0, length,
+                         0, true, response);
+    ASSERT_EQ(response->payload[0], PLDM_ERROR);
+}
+
+TEST(ReadFileIntoMemory, BadPath)
+{
+    uint32_t fileHandle = 0;
+    uint32_t offset = 0;
+    uint32_t length = 10;
+    uint64_t address = 0;
+
+    std::array<uint8_t, PLDM_RW_FILE_MEM_REQ_BYTES> requestMsg{};
+    memcpy(requestMsg.data(), &fileHandle, sizeof(fileHandle));
+    memcpy(requestMsg.data() + sizeof(fileHandle), &offset, sizeof(offset));
+    memcpy(requestMsg.data() + sizeof(fileHandle) + sizeof(offset), &length,
+           sizeof(length));
+    memcpy(requestMsg.data() + sizeof(fileHandle) + sizeof(offset) +
+               sizeof(length),
+           &address, sizeof(address));
+
+    std::array<uint8_t, sizeof(pldm_msg_hdr) + PLDM_RW_FILE_MEM_RESP_BYTES>
+        responseMsg{};
+    pldm_msg* response = reinterpret_cast<pldm_msg*>(responseMsg.data());
+
+    // Pass invalid payload length
+    readFileIntoMemory(requestMsg.data(), 0, response);
+    ASSERT_EQ(response->payload[0], PLDM_ERROR_INVALID_LENGTH);
+}
+
+TEST(WriteFileFromMemory, BadPath)
+{
+    uint32_t fileHandle = 0;
+    uint32_t offset = 0;
+    uint32_t length = 10;
+    uint64_t address = 0;
+
+    std::array<uint8_t, PLDM_RW_FILE_MEM_REQ_BYTES> requestMsg{};
+    memcpy(requestMsg.data(), &fileHandle, sizeof(fileHandle));
+    memcpy(requestMsg.data() + sizeof(fileHandle), &offset, sizeof(offset));
+    memcpy(requestMsg.data() + sizeof(fileHandle) + sizeof(offset), &length,
+           sizeof(length));
+    memcpy(requestMsg.data() + sizeof(fileHandle) + sizeof(offset) +
+               sizeof(length),
+           &address, sizeof(address));
+
+    std::array<uint8_t, sizeof(pldm_msg_hdr) + PLDM_RW_FILE_MEM_RESP_BYTES>
+        responseMsg{};
+    pldm_msg* response = reinterpret_cast<pldm_msg*>(responseMsg.data());
+
+    // Pass invalid payload length
+    writeFileFromMemory(requestMsg.data(), 0, response);
+    ASSERT_EQ(response->payload[0], PLDM_ERROR_INVALID_LENGTH);
+
+    // The length field is not a multiple of DMA minsize
+    writeFileFromMemory(requestMsg.data(), requestMsg.size(), response);
+    ASSERT_EQ(response->payload[0], PLDM_INVALID_WRITE_LENGTH);
+}