diff mbox series

[v10] dmadev: introduce DMA device library

Message ID 1626785182-2973-1-git-send-email-fengchengwen@huawei.com (mailing list archive)
State Superseded
Delegated to: Thomas Monjalon
Headers show
Series [v10] dmadev: introduce DMA device library | expand

Checks

Context Check Description
ci/intel-Testing success Testing PASS
ci/Intel-compilation success Compilation OK
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-testing fail Testing issues
ci/iol-abi-testing success Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/github-robot success github build: passed
ci/checkpatch warning coding style issues

Commit Message

fengchengwen July 20, 2021, 12:46 p.m. UTC
This patch introduce 'dmadevice' which is a generic type of DMA
device.

The APIs of dmadev library exposes some generic operations which can
enable configuration and I/O with the DMA devices.

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
---
v10:
* fix rte_dmadev_completed_status comment.
v9:
* delete RTE_ASSERT invoke.
* make sure vchan setup fail when device started.
* add check src/dst port parameter when setup vchan.
* rename some variables in rte_dmadev.c.
v8:
* fix pcie access port diagram doxygen problem.
* fix typo.
* fix compile warning when enable DMADEV_DEBUG.
v7:
* add rte_dmadev_get_dev_id API.
* fix typo.
* use the default macro assignment scheme.
* rename RTE_DMA_DEV_CAPA_* to RTE_DMADEV_CAPA_*.
* rename rte_dmadev_conf.silent_mode to enable_silent.
* add memset when get stats.
v6:
* delete fence capability.
* delete vchan_release ops.
* copy_sg direct use src/dst/nb_src/nb_dst as paramter.
* define rte_dma_direction, don't support multiple direction in the
  same vchan.
* fix segment fault when allocate.
* fix typo.
* fix comments format.
v5:
* add doxy-api-* file modify.
* use RTE_LOG_REGISTER_DEFAULT.
* fix typo.
* resolve some incorrect comments.
* fix some doxgen problem.
* fix version.map still hold rte_dmadev_completed_fails.
v4:
* replace xxx_complete_fails with xxx_completed_status.
* add SILENT capability, also a silent_mode in rte_dmadev_conf.
* add op_flag_llc for performance.
* rename dmadev_xxx_t to rte_dmadev_xxx_t to avoid namespace conflict.
* delete filed 'enqueued_count' from rte_dmadev_stats.
* make rte_dmadev hold 'dev_private' filed.
* add RTE_DMA_STATUS_NOT_ATTEMPED status code.
* rename RTE_DMA_STATUS_ACTIVE_DROP to RTE_DMA_STATUS_USER_ABORT.
* rename rte_dma_sg(e) to rte_dmadev_sg(e) to make sure all struct
  prefix with rte_dmadev.
* put the comment afterwards.
* fix some doxgen problem.
* delete macro RTE_DMADEV_VALID_DEV_ID_OR_RET and
  RTE_DMADEV_PTR_OR_ERR_RET.
* replace strlcpy with rte_strscpy.
* other minor modifications from review comment.
v3:
* rm reset and fill_sg ops.
* rm MT-safe capabilities.
* add submit flag.
* redefine rte_dma_sg to implement asymmetric copy.
* delete some reserved field for future use.
* rearrangement rte_dmadev/rte_dmadev_data struct.
* refresh rte_dmadev.h copyright.
* update vchan setup parameter.
* modified some inappropriate descriptions.
* arrange version.map alphabetically.
* other minor modifications from review comment.
---
 MAINTAINERS                  |    4 +
 config/rte_config.h          |    3 +
 doc/api/doxy-api-index.md    |    1 +
 doc/api/doxy-api.conf.in     |    1 +
 lib/dmadev/meson.build       |    7 +
 lib/dmadev/rte_dmadev.c      |  563 +++++++++++++++++++++++
 lib/dmadev/rte_dmadev.h      | 1044 ++++++++++++++++++++++++++++++++++++++++++
 lib/dmadev/rte_dmadev_core.h |  182 ++++++++
 lib/dmadev/rte_dmadev_pmd.h  |   72 +++
 lib/dmadev/version.map       |   37 ++
 lib/meson.build              |    1 +
 11 files changed, 1915 insertions(+)
 create mode 100644 lib/dmadev/meson.build
 create mode 100644 lib/dmadev/rte_dmadev.c
 create mode 100644 lib/dmadev/rte_dmadev.h
 create mode 100644 lib/dmadev/rte_dmadev_core.h
 create mode 100644 lib/dmadev/rte_dmadev_pmd.h
 create mode 100644 lib/dmadev/version.map

Comments

fengchengwen July 26, 2021, 6:53 a.m. UTC | #1
Friendly ping.

On 2021/7/20 20:46, Chengwen Feng wrote:
> This patch introduce 'dmadevice' which is a generic type of DMA
> device.
> 
> The APIs of dmadev library exposes some generic operations which can
> enable configuration and I/O with the DMA devices.
> 
> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> ---
> v10:
> * fix rte_dmadev_completed_status comment.

[snip]
Bruce Richardson July 26, 2021, 8:31 a.m. UTC | #2
On Mon, Jul 26, 2021 at 02:53:16PM +0800, fengchengwen wrote:
> Friendly ping.
> 
> On 2021/7/20 20:46, Chengwen Feng wrote:
> > This patch introduce 'dmadevice' which is a generic type of DMA
> > device.
> > 
> > The APIs of dmadev library exposes some generic operations which can
> > enable configuration and I/O with the DMA devices.
> > 
> > Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> > ---
> > v10:
> > * fix rte_dmadev_completed_status comment.
> 
> [snip]

I'm still working through porting over our driver(s) to the latest revisions,
and digging into the details of the error handling and approaches, looking
for any issues. For now, a couple of small suggestions and ideas:

* for the STATUS_UNKNOWN value, I think it should be renamed to
  ERROR_UNKNOWN since this is an error value. Alternatively, add a new
  "UNKNOWN_ERROR" entry in the list to cover this possibility i.e. we know
  status is an error, just not exactly what the error is.

* While we have errors for both invalid source or invalid destination
  addresses, I think we also should add a slightly more general error code
  for "INVALID_ADDR" to cover the case where one is bad but we are not sure
  which.

* Not sure exactly how to handle this, but I suspect we may need some sort
  of capability flag to cover behaviour on hitting an error. For HW using
  our original ioat driver, the jobs are done strictly in order and the HW
  will halt on error, while with hardware using newer idxd driver, things are
  done potentially out-of-order and other jobs continue after the failed
  job. I will come back with a more concrete proposal on this later, once I
  get both drivers up and working. I suspect we will encounter more
  edge-cases like this as people work on drivers.

Overall, functionally this patchset looks pretty good to me. One thing
that will be needed for merge into mainline is a chapter on dmadev for the
programmers guide document, plus any other necessary doc updates such as a
good release-note update for this new lib.

For what is here now though,

Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Morten Brørup July 26, 2021, 11:03 a.m. UTC | #3
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of fengchengwen
> 
> Friendly ping.
> 
> On 2021/7/20 20:46, Chengwen Feng wrote:
> > This patch introduce 'dmadevice' which is a generic type of DMA
> > device.
> >
> > The APIs of dmadev library exposes some generic operations which can
> > enable configuration and I/O with the DMA devices.
> >
> > Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> > ---
> > v10:
> > * fix rte_dmadev_completed_status comment.
> 
> [snip]

Back from vacation. It generally looks good, so you may add:

Acked-By: Morten Brørup <mb@smartsharesystems.com>
Jerin Jacob July 26, 2021, 11:21 a.m. UTC | #4
On Mon, Jul 26, 2021 at 4:34 PM Morten Brørup <mb@smartsharesystems.com> wrote:
>
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of fengchengwen
> >
> > Friendly ping.
> >
> > On 2021/7/20 20:46, Chengwen Feng wrote:
> > > This patch introduce 'dmadevice' which is a generic type of DMA
> > > device.
> > >
> > > The APIs of dmadev library exposes some generic operations which can
> > > enable configuration and I/O with the DMA devices.
> > >
> > > Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> > > ---
> > > v10:
> > > * fix rte_dmadev_completed_status comment.
> >
> > [snip]
>
> Back from vacation. It generally looks good, so you may add:
>
> Acked-By: Morten Brørup <mb@smartsharesystems.com>


You can add my Acked-by after splitting the patches.

>
fengchengwen July 27, 2021, 3:57 a.m. UTC | #5
Thanks

The first two point (STATUS_UNKNOWN->STATUS_ERROR_UNKNOWN, INVALID_ADDR) already
fix in V11.

@Burce @Jerin @Morten
In addition, programming guide is added in v11, please take a look, thanks.


On 2021/7/26 16:31, Bruce Richardson wrote:
> On Mon, Jul 26, 2021 at 02:53:16PM +0800, fengchengwen wrote:
>> Friendly ping.
>>
>> On 2021/7/20 20:46, Chengwen Feng wrote:
>>> This patch introduce 'dmadevice' which is a generic type of DMA
>>> device.
>>>
>>> The APIs of dmadev library exposes some generic operations which can
>>> enable configuration and I/O with the DMA devices.
>>>
>>> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
>>> ---
>>> v10:
>>> * fix rte_dmadev_completed_status comment.
>>
>> [snip]
> 
> I'm still working through porting over our driver(s) to the latest revisions,
> and digging into the details of the error handling and approaches, looking
> for any issues. For now, a couple of small suggestions and ideas:
> 
> * for the STATUS_UNKNOWN value, I think it should be renamed to
>   ERROR_UNKNOWN since this is an error value. Alternatively, add a new
>   "UNKNOWN_ERROR" entry in the list to cover this possibility i.e. we know
>   status is an error, just not exactly what the error is.
> 
> * While we have errors for both invalid source or invalid destination
>   addresses, I think we also should add a slightly more general error code
>   for "INVALID_ADDR" to cover the case where one is bad but we are not sure
>   which.
> 
> * Not sure exactly how to handle this, but I suspect we may need some sort
>   of capability flag to cover behaviour on hitting an error. For HW using
>   our original ioat driver, the jobs are done strictly in order and the HW
>   will halt on error, while with hardware using newer idxd driver, things are
>   done potentially out-of-order and other jobs continue after the failed
>   job. I will come back with a more concrete proposal on this later, once I
>   get both drivers up and working. I suspect we will encounter more
>   edge-cases like this as people work on drivers.
> 
> Overall, functionally this patchset looks pretty good to me. One thing
> that will be needed for merge into mainline is a chapter on dmadev for the
> programmers guide document, plus any other necessary doc updates such as a
> good release-note update for this new lib.
> 
> For what is here now though,
> 
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> 
> .
>
diff mbox series

Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index af2a91d..e01a07f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -495,6 +495,10 @@  F: drivers/raw/skeleton/
 F: app/test/test_rawdev.c
 F: doc/guides/prog_guide/rawdev.rst
 
+DMA device API - EXPERIMENTAL
+M: Chengwen Feng <fengchengwen@huawei.com>
+F: lib/dmadev/
+
 
 Memory Pool Drivers
 -------------------
diff --git a/config/rte_config.h b/config/rte_config.h
index 590903c..331a431 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -81,6 +81,9 @@ 
 /* rawdev defines */
 #define RTE_RAWDEV_MAX_DEVS 64
 
+/* dmadev defines */
+#define RTE_DMADEV_MAX_DEVS 64
+
 /* ip_fragmentation defines */
 #define RTE_LIBRTE_IP_FRAG_MAX_FRAG 4
 #undef RTE_LIBRTE_IP_FRAG_TBL_STAT
diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md
index 1992107..ce08250 100644
--- a/doc/api/doxy-api-index.md
+++ b/doc/api/doxy-api-index.md
@@ -27,6 +27,7 @@  The public API headers are grouped by topics:
   [event_timer_adapter]    (@ref rte_event_timer_adapter.h),
   [event_crypto_adapter]   (@ref rte_event_crypto_adapter.h),
   [rawdev]             (@ref rte_rawdev.h),
+  [dmadev]             (@ref rte_dmadev.h),
   [metrics]            (@ref rte_metrics.h),
   [bitrate]            (@ref rte_bitrate.h),
   [latency]            (@ref rte_latencystats.h),
diff --git a/doc/api/doxy-api.conf.in b/doc/api/doxy-api.conf.in
index 325a019..109ec1f 100644
--- a/doc/api/doxy-api.conf.in
+++ b/doc/api/doxy-api.conf.in
@@ -35,6 +35,7 @@  INPUT                   = @TOPDIR@/doc/api/doxy-api-index.md \
                           @TOPDIR@/lib/compressdev \
                           @TOPDIR@/lib/cryptodev \
                           @TOPDIR@/lib/distributor \
+                          @TOPDIR@/lib/dmadev \
                           @TOPDIR@/lib/efd \
                           @TOPDIR@/lib/ethdev \
                           @TOPDIR@/lib/eventdev \
diff --git a/lib/dmadev/meson.build b/lib/dmadev/meson.build
new file mode 100644
index 0000000..d2fc85e
--- /dev/null
+++ b/lib/dmadev/meson.build
@@ -0,0 +1,7 @@ 
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2021 HiSilicon Limited.
+
+sources = files('rte_dmadev.c')
+headers = files('rte_dmadev.h')
+indirect_headers += files('rte_dmadev_core.h')
+driver_sdk_headers += files('rte_dmadev_pmd.h')
diff --git a/lib/dmadev/rte_dmadev.c b/lib/dmadev/rte_dmadev.c
new file mode 100644
index 0000000..b4f5498
--- /dev/null
+++ b/lib/dmadev/rte_dmadev.c
@@ -0,0 +1,563 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2021 HiSilicon Limited.
+ * Copyright(c) 2021 Intel Corporation.
+ */
+
+#include <ctype.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <rte_debug.h>
+#include <rte_dev.h>
+#include <rte_eal.h>
+#include <rte_errno.h>
+#include <rte_lcore.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_malloc.h>
+#include <rte_string_fns.h>
+
+#include "rte_dmadev.h"
+#include "rte_dmadev_pmd.h"
+
+struct rte_dmadev rte_dmadevices[RTE_DMADEV_MAX_DEVS];
+
+static const char *mz_rte_dmadev_data = "rte_dmadev_data";
+/* Shared memory between primary and secondary processes. */
+static struct {
+	struct rte_dmadev_data data[RTE_DMADEV_MAX_DEVS];
+} *dmadev_shared_data;
+
+RTE_LOG_REGISTER_DEFAULT(rte_dmadev_logtype, INFO);
+#define RTE_DMADEV_LOG(level, ...) \
+	rte_log(RTE_LOG_ ## level, rte_dmadev_logtype, "" __VA_ARGS__)
+
+/* Macros to check for valid device id */
+#define RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, retval) do { \
+	if (!rte_dmadev_is_valid_dev(dev_id)) { \
+		RTE_DMADEV_LOG(ERR, "Invalid dev_id=%u\n", dev_id); \
+		return retval; \
+	} \
+} while (0)
+
+static int
+dmadev_check_name(const char *name)
+{
+	size_t name_len;
+
+	if (name == NULL) {
+		RTE_DMADEV_LOG(ERR, "Name can't be NULL\n");
+		return -EINVAL;
+	}
+
+	name_len = strnlen(name, RTE_DMADEV_NAME_MAX_LEN);
+	if (name_len == 0) {
+		RTE_DMADEV_LOG(ERR, "Zero length DMA device name\n");
+		return -EINVAL;
+	}
+	if (name_len >= RTE_DMADEV_NAME_MAX_LEN) {
+		RTE_DMADEV_LOG(ERR, "DMA device name is too long\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static uint16_t
+dmadev_find_free_dev(void)
+{
+	uint16_t i;
+
+	for (i = 0; i < RTE_DMADEV_MAX_DEVS; i++) {
+		if (dmadev_shared_data->data[i].dev_name[0] == '\0')
+			return i;
+	}
+
+	return RTE_DMADEV_MAX_DEVS;
+}
+
+static struct rte_dmadev*
+dmadev_find(const char *name)
+{
+	uint16_t i;
+
+	for (i = 0; i < RTE_DMADEV_MAX_DEVS; i++) {
+		if ((rte_dmadevices[i].state == RTE_DMADEV_ATTACHED) &&
+		    (!strcmp(name, rte_dmadevices[i].data->dev_name)))
+			return &rte_dmadevices[i];
+	}
+
+	return NULL;
+}
+
+static int
+dmadev_shared_data_prepare(void)
+{
+	const struct rte_memzone *mz;
+
+	if (dmadev_shared_data == NULL) {
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+			/* Allocate port data and ownership shared memory. */
+			mz = rte_memzone_reserve(mz_rte_dmadev_data,
+					 sizeof(*dmadev_shared_data),
+					 rte_socket_id(), 0);
+		} else
+			mz = rte_memzone_lookup(mz_rte_dmadev_data);
+		if (mz == NULL)
+			return -ENOMEM;
+
+		dmadev_shared_data = mz->addr;
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+			memset(dmadev_shared_data->data, 0,
+			       sizeof(dmadev_shared_data->data));
+	}
+
+	return 0;
+}
+
+static struct rte_dmadev *
+dmadev_allocate(const char *name)
+{
+	struct rte_dmadev *dev;
+	uint16_t dev_id;
+
+	dev = dmadev_find(name);
+	if (dev != NULL) {
+		RTE_DMADEV_LOG(ERR, "DMA device already allocated\n");
+		return NULL;
+	}
+
+	if (dmadev_shared_data_prepare() != 0) {
+		RTE_DMADEV_LOG(ERR, "Cannot allocate DMA shared data\n");
+		return NULL;
+	}
+
+	dev_id = dmadev_find_free_dev();
+	if (dev_id == RTE_DMADEV_MAX_DEVS) {
+		RTE_DMADEV_LOG(ERR, "Reached maximum number of DMA devices\n");
+		return NULL;
+	}
+
+	dev = &rte_dmadevices[dev_id];
+	dev->data = &dmadev_shared_data->data[dev_id];
+	dev->data->dev_id = dev_id;
+	rte_strscpy(dev->data->dev_name, name, sizeof(dev->data->dev_name));
+
+	return dev;
+}
+
+static struct rte_dmadev *
+dmadev_attach_secondary(const char *name)
+{
+	struct rte_dmadev *dev;
+	uint16_t i;
+
+	if (dmadev_shared_data_prepare() != 0) {
+		RTE_DMADEV_LOG(ERR, "Cannot allocate DMA shared data\n");
+		return NULL;
+	}
+
+	for (i = 0; i < RTE_DMADEV_MAX_DEVS; i++) {
+		if (!strcmp(dmadev_shared_data->data[i].dev_name, name))
+			break;
+	}
+	if (i == RTE_DMADEV_MAX_DEVS) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %s is not driven by the primary process\n",
+			name);
+		return NULL;
+	}
+
+	dev = &rte_dmadevices[i];
+	dev->data = &dmadev_shared_data->data[i];
+	dev->dev_private = dev->data->dev_private;
+
+	return dev;
+}
+
+struct rte_dmadev *
+rte_dmadev_pmd_allocate(const char *name)
+{
+	struct rte_dmadev *dev;
+
+	if (dmadev_check_name(name) != 0)
+		return NULL;
+
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		dev = dmadev_allocate(name);
+	else
+		dev = dmadev_attach_secondary(name);
+
+	if (dev == NULL)
+		return NULL;
+	dev->state = RTE_DMADEV_ATTACHED;
+
+	return dev;
+}
+
+int
+rte_dmadev_pmd_release(struct rte_dmadev *dev)
+{
+	void *dev_private_tmp;
+
+	if (dev == NULL)
+		return -EINVAL;
+
+	if (dev->state == RTE_DMADEV_UNUSED)
+		return 0;
+
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		memset(dev->data, 0, sizeof(struct rte_dmadev_data));
+
+	dev_private_tmp = dev->dev_private;
+	memset(dev, 0, sizeof(struct rte_dmadev));
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		dev->dev_private = dev_private_tmp;
+	dev->state = RTE_DMADEV_UNUSED;
+
+	return 0;
+}
+
+struct rte_dmadev *
+rte_dmadev_get_device_by_name(const char *name)
+{
+	if (dmadev_check_name(name) != 0)
+		return NULL;
+	return dmadev_find(name);
+}
+
+int
+rte_dmadev_get_dev_id(const char *name)
+{
+	struct rte_dmadev *dev = rte_dmadev_get_device_by_name(name);
+	if (dev != NULL)
+		return dev->data->dev_id;
+	return -EINVAL;
+}
+
+bool
+rte_dmadev_is_valid_dev(uint16_t dev_id)
+{
+	return (dev_id < RTE_DMADEV_MAX_DEVS) &&
+		rte_dmadevices[dev_id].state == RTE_DMADEV_ATTACHED;
+}
+
+uint16_t
+rte_dmadev_count(void)
+{
+	uint16_t count = 0;
+	uint16_t i;
+
+	for (i = 0; i < RTE_DMADEV_MAX_DEVS; i++) {
+		if (rte_dmadevices[i].state == RTE_DMADEV_ATTACHED)
+			count++;
+	}
+
+	return count;
+}
+
+int
+rte_dmadev_info_get(uint16_t dev_id, struct rte_dmadev_info *dev_info)
+{
+	const struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	int ret;
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	if (dev_info == NULL)
+		return -EINVAL;
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_info_get, -ENOTSUP);
+	memset(dev_info, 0, sizeof(struct rte_dmadev_info));
+	ret = (*dev->dev_ops->dev_info_get)(dev, dev_info,
+					    sizeof(struct rte_dmadev_info));
+	if (ret != 0)
+		return ret;
+
+	dev_info->device = dev->device;
+	dev_info->nb_vchans = dev->data->dev_conf.max_vchans;
+
+	return 0;
+}
+
+int
+rte_dmadev_configure(uint16_t dev_id, const struct rte_dmadev_conf *dev_conf)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	struct rte_dmadev_info info;
+	int ret;
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	if (dev_conf == NULL)
+		return -EINVAL;
+
+	if (dev->data->dev_started != 0) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u must be stopped to allow configuration\n",
+			dev_id);
+		return -EBUSY;
+	}
+
+	ret = rte_dmadev_info_get(dev_id, &info);
+	if (ret != 0) {
+		RTE_DMADEV_LOG(ERR, "Device %u get device info fail\n", dev_id);
+		return -EINVAL;
+	}
+	if (dev_conf->max_vchans == 0) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u configure zero vchans\n", dev_id);
+		return -EINVAL;
+	}
+	if (dev_conf->max_vchans > info.max_vchans) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u configure too many vchans\n", dev_id);
+		return -EINVAL;
+	}
+	if (dev_conf->enable_silent &&
+	    !(info.dev_capa & RTE_DMADEV_CAPA_SILENT)) {
+		RTE_DMADEV_LOG(ERR, "Device %u don't support silent\n", dev_id);
+		return -EINVAL;
+	}
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);
+	ret = (*dev->dev_ops->dev_configure)(dev, dev_conf);
+	if (ret == 0)
+		memcpy(&dev->data->dev_conf, dev_conf, sizeof(*dev_conf));
+
+	return ret;
+}
+
+int
+rte_dmadev_start(uint16_t dev_id)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	int ret;
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+
+	if (dev->data->dev_started != 0) {
+		RTE_DMADEV_LOG(WARNING, "Device %u already started\n", dev_id);
+		return 0;
+	}
+
+	if (dev->dev_ops->dev_start == NULL)
+		goto mark_started;
+
+	ret = (*dev->dev_ops->dev_start)(dev);
+	if (ret != 0)
+		return ret;
+
+mark_started:
+	dev->data->dev_started = 1;
+	return 0;
+}
+
+int
+rte_dmadev_stop(uint16_t dev_id)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	int ret;
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+
+	if (dev->data->dev_started == 0) {
+		RTE_DMADEV_LOG(WARNING, "Device %u already stopped\n", dev_id);
+		return 0;
+	}
+
+	if (dev->dev_ops->dev_stop == NULL)
+		goto mark_stopped;
+
+	ret = (*dev->dev_ops->dev_stop)(dev);
+	if (ret != 0)
+		return ret;
+
+mark_stopped:
+	dev->data->dev_started = 0;
+	return 0;
+}
+
+int
+rte_dmadev_close(uint16_t dev_id)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+
+	/* Device must be stopped before it can be closed */
+	if (dev->data->dev_started == 1) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u must be stopped before closing\n", dev_id);
+		return -EBUSY;
+	}
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_close, -ENOTSUP);
+	return (*dev->dev_ops->dev_close)(dev);
+}
+
+int
+rte_dmadev_vchan_setup(uint16_t dev_id,
+		       const struct rte_dmadev_vchan_conf *conf)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	struct rte_dmadev_info info;
+	bool src_is_dev, dst_is_dev;
+	int ret;
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	if (conf == NULL)
+		return -EINVAL;
+
+	if (dev->data->dev_started != 0) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u must be stopped to allow configuration\n",
+			dev_id);
+		return -EBUSY;
+	}
+
+	ret = rte_dmadev_info_get(dev_id, &info);
+	if (ret != 0) {
+		RTE_DMADEV_LOG(ERR, "Device %u get device info fail\n", dev_id);
+		return -EINVAL;
+	}
+	if (conf->direction != RTE_DMA_DIR_MEM_TO_MEM &&
+	    conf->direction != RTE_DMA_DIR_MEM_TO_DEV &&
+	    conf->direction != RTE_DMA_DIR_DEV_TO_MEM &&
+	    conf->direction != RTE_DMA_DIR_DEV_TO_DEV) {
+		RTE_DMADEV_LOG(ERR, "Device %u direction invalid!\n", dev_id);
+		return -EINVAL;
+	}
+	if (conf->direction == RTE_DMA_DIR_MEM_TO_MEM &&
+	    !(info.dev_capa & RTE_DMADEV_CAPA_MEM_TO_MEM)) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u don't support mem2mem transfer\n", dev_id);
+		return -EINVAL;
+	}
+	if (conf->direction == RTE_DMA_DIR_MEM_TO_DEV &&
+	    !(info.dev_capa & RTE_DMADEV_CAPA_MEM_TO_DEV)) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u don't support mem2dev transfer\n", dev_id);
+		return -EINVAL;
+	}
+	if (conf->direction == RTE_DMA_DIR_DEV_TO_MEM &&
+	    !(info.dev_capa & RTE_DMADEV_CAPA_DEV_TO_MEM)) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u don't support dev2mem transfer\n", dev_id);
+		return -EINVAL;
+	}
+	if (conf->direction == RTE_DMA_DIR_DEV_TO_DEV &&
+	    !(info.dev_capa & RTE_DMADEV_CAPA_DEV_TO_DEV)) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u don't support dev2dev transfer\n", dev_id);
+		return -EINVAL;
+	}
+	if (conf->nb_desc < info.min_desc || conf->nb_desc > info.max_desc) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u number of descriptors invalid\n", dev_id);
+		return -EINVAL;
+	}
+	src_is_dev = conf->direction == RTE_DMA_DIR_DEV_TO_MEM ||
+		     conf->direction == RTE_DMA_DIR_DEV_TO_DEV;
+	if ((conf->src_port.port_type == RTE_DMADEV_PORT_NONE && src_is_dev) ||
+	    (conf->src_port.port_type != RTE_DMADEV_PORT_NONE && !src_is_dev)) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u source port type invalid\n", dev_id);
+		return -EINVAL;
+	}
+	dst_is_dev = conf->direction == RTE_DMA_DIR_MEM_TO_DEV ||
+		     conf->direction == RTE_DMA_DIR_DEV_TO_DEV;
+	if ((conf->dst_port.port_type == RTE_DMADEV_PORT_NONE && dst_is_dev) ||
+	    (conf->dst_port.port_type != RTE_DMADEV_PORT_NONE && !dst_is_dev)) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u destination port type invalid\n", dev_id);
+		return -EINVAL;
+	}
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->vchan_setup, -ENOTSUP);
+	return (*dev->dev_ops->vchan_setup)(dev, conf);
+}
+
+int
+rte_dmadev_stats_get(uint16_t dev_id, uint16_t vchan,
+		     struct rte_dmadev_stats *stats)
+{
+	const struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	if (stats == NULL)
+		return -EINVAL;
+	if (vchan >= dev->data->dev_conf.max_vchans &&
+	    vchan != RTE_DMADEV_ALL_VCHAN) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u vchan %u out of range\n", dev_id, vchan);
+		return -EINVAL;
+	}
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->stats_get, -ENOTSUP);
+	memset(stats, 0, sizeof(struct rte_dmadev_stats));
+	return (*dev->dev_ops->stats_get)(dev, vchan, stats,
+					  sizeof(struct rte_dmadev_stats));
+}
+
+int
+rte_dmadev_stats_reset(uint16_t dev_id, uint16_t vchan)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	if (vchan >= dev->data->dev_conf.max_vchans &&
+	    vchan != RTE_DMADEV_ALL_VCHAN) {
+		RTE_DMADEV_LOG(ERR,
+			"Device %u vchan %u out of range\n", dev_id, vchan);
+		return -EINVAL;
+	}
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->stats_reset, -ENOTSUP);
+	return (*dev->dev_ops->stats_reset)(dev, vchan);
+}
+
+int
+rte_dmadev_dump(uint16_t dev_id, FILE *f)
+{
+	const struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	struct rte_dmadev_info info;
+	int ret;
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	if (f == NULL)
+		return -EINVAL;
+
+	ret = rte_dmadev_info_get(dev_id, &info);
+	if (ret != 0) {
+		RTE_DMADEV_LOG(ERR, "Device %u get device info fail\n", dev_id);
+		return -EINVAL;
+	}
+
+	fprintf(f, "DMA Dev %u, '%s' [%s]\n",
+		dev->data->dev_id,
+		dev->data->dev_name,
+		dev->data->dev_started ? "started" : "stopped");
+	fprintf(f, "  dev_capa: 0x%" PRIx64 "\n", info.dev_capa);
+	fprintf(f, "  max_vchans_supported: %u\n", info.max_vchans);
+	fprintf(f, "  max_vchans_configured: %u\n", info.nb_vchans);
+	fprintf(f, "  silent_mode: %s\n",
+		dev->data->dev_conf.enable_silent ? "on" : "off");
+
+	if (dev->dev_ops->dev_dump != NULL)
+		return (*dev->dev_ops->dev_dump)(dev, f);
+
+	return 0;
+}
+
+int
+rte_dmadev_selftest(uint16_t dev_id)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+	RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_selftest, -ENOTSUP);
+	return (*dev->dev_ops->dev_selftest)(dev_id);
+}
diff --git a/lib/dmadev/rte_dmadev.h b/lib/dmadev/rte_dmadev.h
new file mode 100644
index 0000000..bf94179
--- /dev/null
+++ b/lib/dmadev/rte_dmadev.h
@@ -0,0 +1,1044 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2021 HiSilicon Limited.
+ * Copyright(c) 2021 Intel Corporation.
+ * Copyright(c) 2021 Marvell International Ltd.
+ * Copyright(c) 2021 SmartShare Systems.
+ */
+
+#ifndef _RTE_DMADEV_H_
+#define _RTE_DMADEV_H_
+
+/**
+ * @file rte_dmadev.h
+ *
+ * RTE DMA (Direct Memory Access) device APIs.
+ *
+ * The DMA framework is built on the following model:
+ *
+ *     ---------------   ---------------       ---------------
+ *     | virtual DMA |   | virtual DMA |       | virtual DMA |
+ *     | channel     |   | channel     |       | channel     |
+ *     ---------------   ---------------       ---------------
+ *            |                |                      |
+ *            ------------------                      |
+ *                     |                              |
+ *               ------------                    ------------
+ *               |  dmadev  |                    |  dmadev  |
+ *               ------------                    ------------
+ *                     |                              |
+ *            ------------------               ------------------
+ *            | HW-DMA-channel |               | HW-DMA-channel |
+ *            ------------------               ------------------
+ *                     |                              |
+ *                     --------------------------------
+ *                                     |
+ *                           ---------------------
+ *                           | HW-DMA-Controller |
+ *                           ---------------------
+ *
+ * The DMA controller could have multiple HW-DMA-channels (aka. HW-DMA-queues),
+ * each HW-DMA-channel should be represented by a dmadev.
+ *
+ * The dmadev could create multiple virtual DMA channels, each virtual DMA
+ * channel represents a different transfer context. The DMA operation request
+ * must be submitted to the virtual DMA channel. e.g. Application could create
+ * virtual DMA channel 0 for memory-to-memory transfer scenario, and create
+ * virtual DMA channel 1 for memory-to-device transfer scenario.
+ *
+ * The dmadev are dynamically allocated by rte_dmadev_pmd_allocate() during the
+ * PCI/SoC device probing phase performed at EAL initialization time. And could
+ * be released by rte_dmadev_pmd_release() during the PCI/SoC device removing
+ * phase.
+ *
+ * This framework uses 'uint16_t dev_id' as the device identifier of a dmadev,
+ * and 'uint16_t vchan' as the virtual DMA channel identifier in one dmadev.
+ *
+ * The functions exported by the dmadev API to setup a device designated by its
+ * device identifier must be invoked in the following order:
+ *     - rte_dmadev_configure()
+ *     - rte_dmadev_vchan_setup()
+ *     - rte_dmadev_start()
+ *
+ * Then, the application can invoke dataplane APIs to process jobs.
+ *
+ * If the application wants to change the configuration (i.e. invoke
+ * rte_dmadev_configure() or rte_dmadev_vchan_setup()), it must invoke
+ * rte_dmadev_stop() first to stop the device and then do the reconfiguration
+ * before invoking rte_dmadev_start() again. The dataplane APIs should not be
+ * invoked when the device is stopped.
+ *
+ * Finally, an application can close a dmadev by invoking the
+ * rte_dmadev_close() function.
+ *
+ * The dataplane APIs include two parts:
+ * The first part is the submission of operation requests:
+ *     - rte_dmadev_copy()
+ *     - rte_dmadev_copy_sg()
+ *     - rte_dmadev_fill()
+ *     - rte_dmadev_submit()
+ *
+ * These APIs could work with different virtual DMA channels which have
+ * different contexts.
+ *
+ * The first three APIs are used to submit the operation request to the virtual
+ * DMA channel, if the submission is successful, a uint16_t ring_idx is
+ * returned, otherwise a negative number is returned.
+ *
+ * The last API was used to issue doorbell to hardware, and also there are flags
+ * (@see RTE_DMA_OP_FLAG_SUBMIT) parameter of the first three APIs could do the
+ * same work.
+ *
+ * The second part is to obtain the result of requests:
+ *     - rte_dmadev_completed()
+ *         - return the number of operation requests completed successfully.
+ *     - rte_dmadev_completed_status()
+ *         - return the number of operation requests completed.
+ *
+ * @note If the dmadev works in silent mode (@see RTE_DMADEV_CAPA_SILENT),
+ * application does not invoke the above two completed APIs.
+ *
+ * About the ring_idx which enqueue APIs (e.g. rte_dmadev_copy()
+ * rte_dmadev_fill()) returned, the rules are as follows:
+ *     - ring_idx for each virtual DMA channel are independent.
+ *     - For a virtual DMA channel, the ring_idx is monotonically incremented,
+ *       when it reach UINT16_MAX, it wraps back to zero.
+ *     - This ring_idx can be used by applications to track per-operation
+ *       metadata in an application-defined circular ring.
+ *     - The initial ring_idx of a virtual DMA channel is zero, after the
+ *       device is stopped, the ring_idx needs to be reset to zero.
+ *
+ * One example:
+ *     - step-1: start one dmadev
+ *     - step-2: enqueue a copy operation, the ring_idx return is 0
+ *     - step-3: enqueue a copy operation again, the ring_idx return is 1
+ *     - ...
+ *     - step-101: stop the dmadev
+ *     - step-102: start the dmadev
+ *     - step-103: enqueue a copy operation, the cookie return is 0
+ *     - ...
+ *     - step-x+0: enqueue a fill operation, the ring_idx return is 65535
+ *     - step-x+1: enqueue a copy operation, the ring_idx return is 0
+ *     - ...
+ *
+ * The DMA operation address used in enqueue APIs (i.e. rte_dmadev_copy(),
+ * rte_dmadev_copy_sg(), rte_dmadev_fill()) defined as rte_iova_t type. The
+ * dmadev supports two types of address: memory address and device address.
+ *
+ * - memory address: the source and destination address of the memory-to-memory
+ * transfer type, or the source address of the memory-to-device transfer type,
+ * or the destination address of the device-to-memory transfer type.
+ * @note If the device support SVA (@see RTE_DMADEV_CAPA_SVA), the memory
+ * address can be any VA address, otherwise it must be an IOVA address.
+ *
+ * - device address: the source and destination address of the device-to-device
+ * transfer type, or the source address of the device-to-memory transfer type,
+ * or the destination address of the memory-to-device transfer type.
+ *
+ * By default, all the functions of the dmadev API exported by a PMD are
+ * lock-free functions which assume to not be invoked in parallel on different
+ * logical cores to work on the same target dmadev object.
+ * @note Different virtual DMA channels on the same dmadev *DO NOT* support
+ * parallel invocation because these virtual DMA channels share the same
+ * HW-DMA-channel.
+ *
+ */
+
+#include <rte_common.h>
+#include <rte_compat.h>
+#include <rte_dev.h>
+#include <rte_errno.h>
+#include <rte_memory.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RTE_DMADEV_NAME_MAX_LEN	RTE_DEV_NAME_MAX_LEN
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Get the device identifier for the named DMA device.
+ *
+ * @param name
+ *   DMA device name.
+ *
+ * @return
+ *   Returns DMA device identifier on success.
+ *   - <0: Failure to find named DMA device.
+ */
+__rte_experimental
+int
+rte_dmadev_get_dev_id(const char *name);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * @param dev_id
+ *   DMA device index.
+ *
+ * @return
+ *   - If the device index is valid (true) or not (false).
+ */
+__rte_experimental
+bool
+rte_dmadev_is_valid_dev(uint16_t dev_id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Get the total number of DMA devices that have been successfully
+ * initialised.
+ *
+ * @return
+ *   The total number of usable DMA devices.
+ */
+__rte_experimental
+uint16_t
+rte_dmadev_count(void);
+
+/* Enumerates DMA device capabilities. */
+#define RTE_DMADEV_CAPA_MEM_TO_MEM	(1ull << 0)
+/**< DMA device support memory-to-memory transfer.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMADEV_CAPA_MEM_TO_DEV	(1ull << 1)
+/**< DMA device support memory-to-device transfer.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ * @see struct rte_dmadev_port_param::port_type
+ */
+
+#define RTE_DMADEV_CAPA_DEV_TO_MEM	(1ull << 2)
+/**< DMA device support device-to-memory transfer.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ * @see struct rte_dmadev_port_param::port_type
+ */
+
+#define RTE_DMADEV_CAPA_DEV_TO_DEV	(1ull << 3)
+/**< DMA device support device-to-device transfer.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ * @see struct rte_dmadev_port_param::port_type
+ */
+
+#define RTE_DMADEV_CAPA_SVA		(1ull << 4)
+/**< DMA device support SVA which could use VA as DMA address.
+ * If device support SVA then application could pass any VA address like memory
+ * from rte_malloc(), rte_memzone(), malloc, stack memory.
+ * If device don't support SVA, then application should pass IOVA address which
+ * from rte_malloc(), rte_memzone().
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMADEV_CAPA_SILENT		(1ull << 5)
+/**< DMA device support work in silent mode.
+ * In this mode, application don't required to invoke rte_dmadev_completed*()
+ * API.
+ *
+ * @see struct rte_dmadev_conf::silent_mode
+ */
+
+#define RTE_DMADEV_CAPA_OPS_COPY	(1ull << 32)
+/**< DMA device support copy ops.
+ * This capability start with index of 32, so that it could leave gap between
+ * normal capability and ops capability.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMADEV_CAPA_OPS_COPY_SG	(1ull << 33)
+/**< DMA device support scatter-list copy ops.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMADEV_CAPA_OPS_FILL	(1ull << 34)
+/**< DMA device support fill ops.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+/**
+ * A structure used to retrieve the information of a DMA device.
+ */
+struct rte_dmadev_info {
+	struct rte_device *device; /**< Generic Device information. */
+	uint64_t dev_capa; /**< Device capabilities (RTE_DMADEV_CAPA_*). */
+	uint16_t max_vchans;
+	/**< Maximum number of virtual DMA channels supported. */
+	uint16_t max_desc;
+	/**< Maximum allowed number of virtual DMA channel descriptors. */
+	uint16_t min_desc;
+	/**< Minimum allowed number of virtual DMA channel descriptors. */
+	uint16_t nb_vchans; /**< Number of virtual DMA channel configured. */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Retrieve information of a DMA device.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param[out] dev_info
+ *   A pointer to a structure of type *rte_dmadev_info* to be filled with the
+ *   information of the device.
+ *
+ * @return
+ *   - =0: Success, driver updates the information of the DMA device.
+ *   - <0: Error code returned by the driver info get function.
+ *
+ */
+__rte_experimental
+int
+rte_dmadev_info_get(uint16_t dev_id, struct rte_dmadev_info *dev_info);
+
+/**
+ * A structure used to configure a DMA device.
+ */
+struct rte_dmadev_conf {
+	uint16_t max_vchans;
+	/**< Maximum number of virtual DMA channel to use.
+	 * This value cannot be greater than the field 'max_vchans' of struct
+	 * rte_dmadev_info which get from rte_dmadev_info_get().
+	 */
+	bool enable_silent;
+	/**< Indicates whether to enable silent mode.
+	 * false-default mode, true-silent mode.
+	 * This value can be set to true only when the SILENT capability is
+	 * supported.
+	 *
+	 * @see RTE_DMADEV_CAPA_SILENT
+	 */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Configure a DMA device.
+ *
+ * This function must be invoked first before any other function in the
+ * API. This function can also be re-invoked when a device is in the
+ * stopped state.
+ *
+ * @param dev_id
+ *   The identifier of the device to configure.
+ * @param dev_conf
+ *   The DMA device configuration structure encapsulated into rte_dmadev_conf
+ *   object.
+ *
+ * @return
+ *   - =0: Success, device configured.
+ *   - <0: Error code returned by the driver configuration function.
+ */
+__rte_experimental
+int
+rte_dmadev_configure(uint16_t dev_id, const struct rte_dmadev_conf *dev_conf);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Start a DMA device.
+ *
+ * The device start step is the last one and consists of setting the DMA
+ * to start accepting jobs.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ *
+ * @return
+ *   - =0: Success, device started.
+ *   - <0: Error code returned by the driver start function.
+ */
+__rte_experimental
+int
+rte_dmadev_start(uint16_t dev_id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Stop a DMA device.
+ *
+ * The device can be restarted with a call to rte_dmadev_start().
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ *
+ * @return
+ *   - =0: Success, device stopped.
+ *   - <0: Error code returned by the driver stop function.
+ */
+__rte_experimental
+int
+rte_dmadev_stop(uint16_t dev_id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Close a DMA device.
+ *
+ * The device cannot be restarted after this call.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ *
+ * @return
+ *  - =0: Successfully close device
+ *  - <0: Failure to close device
+ */
+__rte_experimental
+int
+rte_dmadev_close(uint16_t dev_id);
+
+/**
+ * rte_dma_direction - DMA transfer direction defines.
+ */
+enum rte_dma_direction {
+	RTE_DMA_DIR_MEM_TO_MEM,
+	/**< DMA transfer direction - from memory to memory.
+	 *
+	 * @see struct rte_dmadev_vchan_conf::direction
+	 */
+	RTE_DMA_DIR_MEM_TO_DEV,
+	/**< DMA transfer direction - from memory to device.
+	 * In a typical scenario, the SoCs are installed on host servers as
+	 * iNICs through the PCIe interface. In this case, the SoCs works in
+	 * EP(endpoint) mode, it could initiate a DMA move request from memory
+	 * (which is SoCs memory) to device (which is host memory).
+	 *
+	 * @see struct rte_dmadev_vchan_conf::direction
+	 */
+	RTE_DMA_DIR_DEV_TO_MEM,
+	/**< DMA transfer direction - from device to memory.
+	 * In a typical scenario, the SoCs are installed on host servers as
+	 * iNICs through the PCIe interface. In this case, the SoCs works in
+	 * EP(endpoint) mode, it could initiate a DMA move request from device
+	 * (which is host memory) to memory (which is SoCs memory).
+	 *
+	 * @see struct rte_dmadev_vchan_conf::direction
+	 */
+	RTE_DMA_DIR_DEV_TO_DEV,
+	/**< DMA transfer direction - from device to device.
+	 * In a typical scenario, the SoCs are installed on host servers as
+	 * iNICs through the PCIe interface. In this case, the SoCs works in
+	 * EP(endpoint) mode, it could initiate a DMA move request from device
+	 * (which is host memory) to the device (which is another host memory).
+	 *
+	 * @see struct rte_dmadev_vchan_conf::direction
+	 */
+};
+
+/**
+ * enum rte_dmadev_port_type - DMA access port type defines.
+ *
+ * @see struct rte_dmadev_port_param::port_type
+ */
+enum rte_dmadev_port_type {
+	RTE_DMADEV_PORT_NONE,
+	RTE_DMADEV_PORT_PCIE, /**< The DMA access port is PCIe. */
+};
+
+/**
+ * A structure used to descript DMA access port parameters.
+ *
+ * @see struct rte_dmadev_vchan_conf::src_port
+ * @see struct rte_dmadev_vchan_conf::dst_port
+ */
+struct rte_dmadev_port_param {
+	enum rte_dmadev_port_type port_type;
+	/**< The device access port type.
+	 * @see enum rte_dmadev_port_type
+	 */
+	union {
+		/** PCIe access port parameters.
+		 *
+		 * The following model shows SoC's PCIe module connects to
+		 * multiple PCIe hosts and multiple endpoints. The PCIe module
+		 * has an integrated DMA controller.
+		 *
+		 * If the DMA wants to access the memory of host A, it can be
+		 * initiated by PF1 in core0, or by VF0 of PF0 in core0.
+		 *
+		 * \code{.unparsed}
+		 * System Bus
+		 *    |     ----------PCIe module----------
+		 *    |     Bus
+		 *    |     Interface
+		 *    |     -----        ------------------
+		 *    |     |   |        | PCIe Core0     |
+		 *    |     |   |        |                |        -----------
+		 *    |     |   |        |   PF-0 -- VF-0 |        | Host A  |
+		 *    |     |   |--------|        |- VF-1 |--------| Root    |
+		 *    |     |   |        |   PF-1         |        | Complex |
+		 *    |     |   |        |   PF-2         |        -----------
+		 *    |     |   |        ------------------
+		 *    |     |   |
+		 *    |     |   |        ------------------
+		 *    |     |   |        | PCIe Core1     |
+		 *    |     |   |        |                |        -----------
+		 *    |     |   |        |   PF-0 -- VF-0 |        | Host B  |
+		 *    |-----|   |--------|   PF-1 -- VF-0 |--------| Root    |
+		 *    |     |   |        |        |- VF-1 |        | Complex |
+		 *    |     |   |        |   PF-2         |        -----------
+		 *    |     |   |        ------------------
+		 *    |     |   |
+		 *    |     |   |        ------------------
+		 *    |     |DMA|        |                |        ------
+		 *    |     |   |        |                |--------| EP |
+		 *    |     |   |--------| PCIe Core2     |        ------
+		 *    |     |   |        |                |        ------
+		 *    |     |   |        |                |--------| EP |
+		 *    |     |   |        |                |        ------
+		 *    |     -----        ------------------
+		 *
+		 * \endcode
+		 *
+		 * @note If some fields can not be supported by the
+		 * hardware/driver, then the driver ignores those fields.
+		 * Please check driver-specific documentation for limitations
+		 * and capablites.
+		 */
+		struct {
+			uint64_t coreid : 4; /**< PCIe core id used. */
+			uint64_t pfid : 8; /**< PF id used. */
+			uint64_t vfen : 1; /**< VF enable bit. */
+			uint64_t vfid : 16; /**< VF id used. */
+			uint64_t pasid : 20;
+			/**< The pasid filed in TLP packet. */
+			uint64_t attr : 3;
+			/**< The attributes filed in TLP packet. */
+			uint64_t ph : 2;
+			/**< The processing hint filed in TLP packet. */
+			uint64_t st : 16;
+			/**< The steering tag filed in TLP packet. */
+		} pcie;
+	};
+	uint64_t reserved[2]; /**< Reserved for future fields. */
+};
+
+/**
+ * A structure used to configure a virtual DMA channel.
+ */
+struct rte_dmadev_vchan_conf {
+	enum rte_dma_direction direction;
+	/**< Transfer direction
+	 * @see enum rte_dma_direction
+	 */
+	uint16_t nb_desc;
+	/**< Number of descriptor for the virtual DMA channel */
+	struct rte_dmadev_port_param src_port;
+	/**< 1) Used to describes the device access port parameter in the
+	 * device-to-memory transfer scenario.
+	 * 2) Used to describes the source device access port parameter in the
+	 * device-to-device transfer scenario.
+	 * @see struct rte_dmadev_port_param
+	 */
+	struct rte_dmadev_port_param dst_port;
+	/**< 1) Used to describes the device access port parameter in the
+	 * memory-to-device transfer scenario.
+	 * 2) Used to describes the destination device access port parameter in
+	 * the device-to-device transfer scenario.
+	 * @see struct rte_dmadev_port_param
+	 */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Allocate and set up a virtual DMA channel.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param conf
+ *   The virtual DMA channel configuration structure encapsulated into
+ *   rte_dmadev_vchan_conf object.
+ *
+ * @return
+ *   - >=0: Allocate success, it is the virtual DMA channel id. This value must
+ *          be less than the field 'max_vchans' of struct rte_dmadev_conf
+ *          which configured by rte_dmadev_configure().
+ *   - <0: Error code returned by the driver virtual channel setup function.
+ */
+__rte_experimental
+int
+rte_dmadev_vchan_setup(uint16_t dev_id,
+		       const struct rte_dmadev_vchan_conf *conf);
+
+/**
+ * rte_dmadev_stats - running statistics.
+ */
+struct rte_dmadev_stats {
+	uint64_t submitted_count;
+	/**< Count of operations which were submitted to hardware. */
+	uint64_t completed_fail_count;
+	/**< Count of operations which failed to complete. */
+	uint64_t completed_count;
+	/**< Count of operations which successfully complete. */
+};
+
+#define RTE_DMADEV_ALL_VCHAN	0xFFFFu
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Retrieve basic statistics of a or all virtual DMA channel(s).
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ *   If equal RTE_DMADEV_ALL_VCHAN means all channels.
+ * @param[out] stats
+ *   The basic statistics structure encapsulated into rte_dmadev_stats
+ *   object.
+ *
+ * @return
+ *   - =0: Successfully retrieve stats.
+ *   - <0: Failure to retrieve stats.
+ */
+__rte_experimental
+int
+rte_dmadev_stats_get(uint16_t dev_id, uint16_t vchan,
+		     struct rte_dmadev_stats *stats);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Reset basic statistics of a or all virtual DMA channel(s).
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ *   If equal RTE_DMADEV_ALL_VCHAN means all channels.
+ *
+ * @return
+ *   - =0: Successfully reset stats.
+ *   - <0: Failure to reset stats.
+ */
+__rte_experimental
+int
+rte_dmadev_stats_reset(uint16_t dev_id, uint16_t vchan);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Dump DMA device info.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param f
+ *   The file to write the output to.
+ *
+ * @return
+ *   0 on success. Non-zero otherwise.
+ */
+__rte_experimental
+int
+rte_dmadev_dump(uint16_t dev_id, FILE *f);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Trigger the dmadev self test.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ *
+ * @return
+ *   - 0: Selftest successful.
+ *   - -ENOTSUP if the device doesn't support selftest
+ *   - other values < 0 on failure.
+ */
+__rte_experimental
+int
+rte_dmadev_selftest(uint16_t dev_id);
+
+/**
+ * rte_dma_status_code - DMA transfer result status code defines.
+ */
+enum rte_dma_status_code {
+	RTE_DMA_STATUS_SUCCESSFUL,
+	/**< The operation completed successfully. */
+	RTE_DMA_STATUS_USRER_ABORT,
+	/**< The operation failed to complete due abort by user.
+	 * This is mainly used when processing dev_stop, user could modidy the
+	 * descriptors (e.g. change one bit to tell hardware abort this job),
+	 * it allows outstanding requests to be complete as much as possible,
+	 * so reduce the time to stop the device.
+	 */
+	RTE_DMA_STATUS_NOT_ATTEMPTED,
+	/**< The operation failed to complete due to following scenarios:
+	 * The jobs in a particular batch are not attempted because they
+	 * appeared after a fence where a previous job failed. In some HW
+	 * implementation it's possible for jobs from later batches would be
+	 * completed, though, so report the status from the not attempted jobs
+	 * before reporting those newer completed jobs.
+	 */
+	RTE_DMA_STATUS_INVALID_SRC_ADDR,
+	/**< The operation failed to complete due invalid source address. */
+	RTE_DMA_STATUS_INVALID_DST_ADDR,
+	/**< The operation failed to complete due invalid destination
+	 * address.
+	 */
+	RTE_DMA_STATUS_INVALID_LENGTH,
+	/**< The operation failed to complete due invalid length. */
+	RTE_DMA_STATUS_INVALID_OPCODE,
+	/**< The operation failed to complete due invalid opcode.
+	 * The DMA descriptor could have multiple format, which are
+	 * distinguished by the opcode field.
+	 */
+	RTE_DMA_STATUS_BUS_ERROR,
+	/**< The operation failed to complete due bus err. */
+	RTE_DMA_STATUS_DATA_POISION,
+	/**< The operation failed to complete due data poison. */
+	RTE_DMA_STATUS_DESCRIPTOR_READ_ERROR,
+	/**< The operation failed to complete due descriptor read error. */
+	RTE_DMA_STATUS_DEV_LINK_ERROR,
+	/**< The operation failed to complete due device link error.
+	 * Used to indicates that the link error in the memory-to-device/
+	 * device-to-memory/device-to-device transfer scenario.
+	 */
+	RTE_DMA_STATUS_UNKNOWN = 0x100,
+	/**< The operation failed to complete due unknown reason.
+	 * The initial value is 256, which reserves space for future errors.
+	 */
+};
+
+/**
+ * rte_dmadev_sge - can hold scatter DMA operation request entry.
+ */
+struct rte_dmadev_sge {
+	rte_iova_t addr; /**< The DMA operation address. */
+	uint32_t length; /**< The DMA operation length. */
+};
+
+#include "rte_dmadev_core.h"
+
+/* DMA flags to augment operation preparation. */
+#define RTE_DMA_OP_FLAG_FENCE	(1ull << 0)
+/**< DMA fence flag.
+ * It means the operation with this flag must be processed only after all
+ * previous operations are completed.
+ * If the specify DMA HW works in-order (it means it has default fence between
+ * operations), this flag could be NOP.
+ *
+ * @see rte_dmadev_copy()
+ * @see rte_dmadev_copy_sg()
+ * @see rte_dmadev_fill()
+ */
+
+#define RTE_DMA_OP_FLAG_SUBMIT	(1ull << 1)
+/**< DMA submit flag.
+ * It means the operation with this flag must issue doorbell to hardware after
+ * enqueued jobs.
+ */
+
+#define RTE_DMA_OP_FLAG_LLC	(1ull << 2)
+/**< DMA write data to low level cache hint.
+ * Used for performance optimization, this is just a hint, and there is no
+ * capability bit for this, driver should not return error if this flag was set.
+ */
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Enqueue a copy operation onto the virtual DMA channel.
+ *
+ * This queues up a copy operation to be performed by hardware, if the 'flags'
+ * parameter contains RTE_DMA_OP_FLAG_SUBMIT then trigger doorbell to begin
+ * this operation, otherwise do not trigger doorbell.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ * @param src
+ *   The address of the source buffer.
+ * @param dst
+ *   The address of the destination buffer.
+ * @param length
+ *   The length of the data to be copied.
+ * @param flags
+ *   An flags for this operation.
+ *   @see RTE_DMA_OP_FLAG_*
+ *
+ * @return
+ *   - 0..UINT16_MAX: index of enqueued copy job.
+ *   - <0: Error code returned by the driver copy function.
+ */
+__rte_experimental
+static inline int
+rte_dmadev_copy(uint16_t dev_id, uint16_t vchan, rte_iova_t src, rte_iova_t dst,
+		uint32_t length, uint64_t flags)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dmadev_is_valid_dev(dev_id) ||
+	    vchan >= dev->data->dev_conf.max_vchans || length == 0)
+		return -EINVAL;
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->copy, -ENOTSUP);
+#endif
+
+	return (*dev->copy)(dev, vchan, src, dst, length, flags);
+}
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Enqueue a scatter list copy operation onto the virtual DMA channel.
+ *
+ * This queues up a scatter list copy operation to be performed by hardware, if
+ * the 'flags' parameter contains RTE_DMA_OP_FLAG_SUBMIT then trigger doorbell
+ * to begin this operation, otherwise do not trigger doorbell.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ * @param src
+ *   The pointer of source scatter entry array.
+ * @param dst
+ *   The pointer of destination scatter entry array.
+ * @param nb_src
+ *   The number of source scatter entry.
+ * @param nb_dst
+ *   The number of destination scatter entry.
+ * @param flags
+ *   An flags for this operation.
+ *   @see RTE_DMA_OP_FLAG_*
+ *
+ * @return
+ *   - 0..UINT16_MAX: index of enqueued copy scatterlist job.
+ *   - <0: Error code returned by the driver copy scatterlist function.
+ */
+__rte_experimental
+static inline int
+rte_dmadev_copy_sg(uint16_t dev_id, uint16_t vchan, struct rte_dmadev_sge *src,
+		   struct rte_dmadev_sge *dst, uint16_t nb_src, uint16_t nb_dst,
+		   uint64_t flags)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dmadev_is_valid_dev(dev_id) ||
+	    vchan >= dev->data->dev_conf.max_vchans ||
+	    src == NULL || dst == NULL || nb_src == 0 || nb_dst == 0)
+		return -EINVAL;
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->copy_sg, -ENOTSUP);
+#endif
+
+	return (*dev->copy_sg)(dev, vchan, src, dst, nb_src, nb_dst, flags);
+}
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Enqueue a fill operation onto the virtual DMA channel.
+ *
+ * This queues up a fill operation to be performed by hardware, if the 'flags'
+ * parameter contains RTE_DMA_OP_FLAG_SUBMIT then trigger doorbell to begin
+ * this operation, otherwise do not trigger doorbell.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ * @param pattern
+ *   The pattern to populate the destination buffer with.
+ * @param dst
+ *   The address of the destination buffer.
+ * @param length
+ *   The length of the destination buffer.
+ * @param flags
+ *   An flags for this operation.
+ *   @see RTE_DMA_OP_FLAG_*
+ *
+ * @return
+ *   - 0..UINT16_MAX: index of enqueued fill job.
+ *   - <0: Error code returned by the driver fill function.
+ */
+__rte_experimental
+static inline int
+rte_dmadev_fill(uint16_t dev_id, uint16_t vchan, uint64_t pattern,
+		rte_iova_t dst, uint32_t length, uint64_t flags)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dmadev_is_valid_dev(dev_id) ||
+	    vchan >= dev->data->dev_conf.max_vchans || length == 0)
+		return -EINVAL;
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->fill, -ENOTSUP);
+#endif
+
+	return (*dev->fill)(dev, vchan, pattern, dst, length, flags);
+}
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Trigger hardware to begin performing enqueued operations.
+ *
+ * This API is used to write the "doorbell" to the hardware to trigger it
+ * to begin the operations previously enqueued by rte_dmadev_copy/fill().
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ *
+ * @return
+ *   - =0: Successfully trigger hardware.
+ *   - <0: Failure to trigger hardware.
+ */
+__rte_experimental
+static inline int
+rte_dmadev_submit(uint16_t dev_id, uint16_t vchan)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dmadev_is_valid_dev(dev_id) ||
+	    vchan >= dev->data->dev_conf.max_vchans)
+		return -EINVAL;
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->submit, -ENOTSUP);
+#endif
+
+	return (*dev->submit)(dev, vchan);
+}
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Returns the number of operations that have been successfully completed.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ * @param nb_cpls
+ *   The maximum number of completed operations that can be processed.
+ * @param[out] last_idx
+ *   The last completed operation's index.
+ *   If not required, NULL can be passed in.
+ * @param[out] has_error
+ *   Indicates if there are transfer error.
+ *   If not required, NULL can be passed in.
+ *
+ * @return
+ *   The number of operations that successfully completed. This return value
+ *   must be less than or equal to the value of nb_cpls.
+ */
+__rte_experimental
+static inline uint16_t
+rte_dmadev_completed(uint16_t dev_id, uint16_t vchan, const uint16_t nb_cpls,
+		     uint16_t *last_idx, bool *has_error)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	uint16_t idx;
+	bool err;
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dmadev_is_valid_dev(dev_id) ||
+	    vchan >= dev->data->dev_conf.max_vchans || nb_cpls == 0)
+		return 0;
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->completed, 0);
+#endif
+
+	/* Ensure the pointer values are non-null to simplify drivers.
+	 * In most cases these should be compile time evaluated, since this is
+	 * an inline function.
+	 * - If NULL is explicitly passed as parameter, then compiler knows the
+	 *   value is NULL
+	 * - If address of local variable is passed as parameter, then compiler
+	 *   can know it's non-NULL.
+	 */
+	if (last_idx == NULL)
+		last_idx = &idx;
+	if (has_error == NULL)
+		has_error = &err;
+
+	*has_error = false;
+	return (*dev->completed)(dev, vchan, nb_cpls, last_idx, has_error);
+}
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Returns the number of operations that have been completed, and the
+ * operations result may succeed or fail.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ * @param nb_cpls
+ *   Indicates the size of status array.
+ * @param[out] last_idx
+ *   The last completed operation's index.
+ *   If not required, NULL can be passed in.
+ * @param[out] status
+ *   This is a pointer to an array of length 'nb_cpls' that holds the completion
+ *   status code of each operation.
+ *   @see enum rte_dma_status_code
+ *
+ * @return
+ *   The number of operations that completed. This return value must be less
+ *   than or equal to the value of nb_cpls.
+ *   If this number is greater than zero (assuming n), then n values in the
+ *   status array are also set.
+ */
+__rte_experimental
+static inline uint16_t
+rte_dmadev_completed_status(uint16_t dev_id, uint16_t vchan,
+			    const uint16_t nb_cpls, uint16_t *last_idx,
+			    enum rte_dma_status_code *status)
+{
+	struct rte_dmadev *dev = &rte_dmadevices[dev_id];
+	uint16_t idx;
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dmadev_is_valid_dev(dev_id) ||
+	    vchan >= dev->data->dev_conf.max_vchans ||
+	    nb_cpls == 0 || status == NULL)
+		return 0;
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->completed_status, 0);
+#endif
+
+	if (last_idx == NULL)
+		last_idx = &idx;
+
+	return (*dev->completed_status)(dev, vchan, nb_cpls, last_idx, status);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_DMADEV_H_ */
diff --git a/lib/dmadev/rte_dmadev_core.h b/lib/dmadev/rte_dmadev_core.h
new file mode 100644
index 0000000..0122f67
--- /dev/null
+++ b/lib/dmadev/rte_dmadev_core.h
@@ -0,0 +1,182 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2021 HiSilicon Limited.
+ * Copyright(c) 2021 Intel Corporation.
+ */
+
+#ifndef _RTE_DMADEV_CORE_H_
+#define _RTE_DMADEV_CORE_H_
+
+/**
+ * @file
+ *
+ * RTE DMA Device internal header.
+ *
+ * This header contains internal data types, that are used by the DMA devices
+ * in order to expose their ops to the class.
+ *
+ * Applications should not use these API directly.
+ *
+ */
+
+struct rte_dmadev;
+
+typedef int (*rte_dmadev_info_get_t)(const struct rte_dmadev *dev,
+				     struct rte_dmadev_info *dev_info,
+				     uint32_t info_sz);
+/**< @internal Used to get device information of a device. */
+
+typedef int (*rte_dmadev_configure_t)(struct rte_dmadev *dev,
+				      const struct rte_dmadev_conf *dev_conf);
+/**< @internal Used to configure a device. */
+
+typedef int (*rte_dmadev_start_t)(struct rte_dmadev *dev);
+/**< @internal Used to start a configured device. */
+
+typedef int (*rte_dmadev_stop_t)(struct rte_dmadev *dev);
+/**< @internal Used to stop a configured device. */
+
+typedef int (*rte_dmadev_close_t)(struct rte_dmadev *dev);
+/**< @internal Used to close a configured device. */
+
+typedef int (*rte_dmadev_vchan_setup_t)(struct rte_dmadev *dev,
+				const struct rte_dmadev_vchan_conf *conf);
+/**< @internal Used to allocate and set up a virtual DMA channel. */
+
+typedef int (*rte_dmadev_stats_get_t)(const struct rte_dmadev *dev,
+			uint16_t vchan, struct rte_dmadev_stats *stats,
+			uint32_t stats_sz);
+/**< @internal Used to retrieve basic statistics. */
+
+typedef int (*rte_dmadev_stats_reset_t)(struct rte_dmadev *dev, uint16_t vchan);
+/**< @internal Used to reset basic statistics. */
+
+typedef int (*rte_dmadev_dump_t)(const struct rte_dmadev *dev, FILE *f);
+/**< @internal Used to dump internal information. */
+
+typedef int (*rte_dmadev_selftest_t)(uint16_t dev_id);
+/**< @internal Used to start dmadev selftest. */
+
+typedef int (*rte_dmadev_copy_t)(struct rte_dmadev *dev, uint16_t vchan,
+				 rte_iova_t src, rte_iova_t dst,
+				 uint32_t length, uint64_t flags);
+/**< @internal Used to enqueue a copy operation. */
+
+typedef int (*rte_dmadev_copy_sg_t)(struct rte_dmadev *dev, uint16_t vchan,
+				    const struct rte_dmadev_sge *src,
+				    const struct rte_dmadev_sge *dst,
+				    uint16_t nb_src, uint16_t nb_dst,
+				    uint64_t flags);
+/**< @internal Used to enqueue a scatter list copy operation. */
+
+typedef int (*rte_dmadev_fill_t)(struct rte_dmadev *dev, uint16_t vchan,
+				 uint64_t pattern, rte_iova_t dst,
+				 uint32_t length, uint64_t flags);
+/**< @internal Used to enqueue a fill operation. */
+
+typedef int (*rte_dmadev_submit_t)(struct rte_dmadev *dev, uint16_t vchan);
+/**< @internal Used to trigger hardware to begin working. */
+
+typedef uint16_t (*rte_dmadev_completed_t)(struct rte_dmadev *dev,
+				uint16_t vchan, const uint16_t nb_cpls,
+				uint16_t *last_idx, bool *has_error);
+/**< @internal Used to return number of successful completed operations. */
+
+typedef uint16_t (*rte_dmadev_completed_status_t)(struct rte_dmadev *dev,
+			uint16_t vchan, const uint16_t nb_cpls,
+			uint16_t *last_idx, enum rte_dma_status_code *status);
+/**< @internal Used to return number of completed operations. */
+
+/**
+ * Possible states of a DMA device.
+ */
+enum rte_dmadev_state {
+	RTE_DMADEV_UNUSED = 0,
+	/**< Device is unused before being probed. */
+	RTE_DMADEV_ATTACHED,
+	/**< Device is attached when allocated in probing. */
+};
+
+/**
+ * DMA device operations function pointer table
+ */
+struct rte_dmadev_ops {
+	rte_dmadev_info_get_t dev_info_get;
+	rte_dmadev_configure_t dev_configure;
+	rte_dmadev_start_t dev_start;
+	rte_dmadev_stop_t dev_stop;
+	rte_dmadev_close_t dev_close;
+	rte_dmadev_vchan_setup_t vchan_setup;
+	rte_dmadev_stats_get_t stats_get;
+	rte_dmadev_stats_reset_t stats_reset;
+	rte_dmadev_dump_t dev_dump;
+	rte_dmadev_selftest_t dev_selftest;
+};
+
+/**
+ * @internal
+ * The data part, with no function pointers, associated with each DMA device.
+ *
+ * This structure is safe to place in shared memory to be common among different
+ * processes in a multi-process configuration.
+ */
+struct rte_dmadev_data {
+	void *dev_private;
+	/**< PMD-specific private data.
+	 * This is a copy of the 'dev_private' field in the 'struct rte_dmadev'
+	 * from primary process, it is used by the secondary process to get
+	 * dev_private information.
+	 */
+	uint16_t dev_id; /**< Device [external] identifier. */
+	char dev_name[RTE_DMADEV_NAME_MAX_LEN]; /**< Unique identifier name */
+	struct rte_dmadev_conf dev_conf; /**< DMA device configuration. */
+	uint8_t dev_started : 1; /**< Device state: STARTED(1)/STOPPED(0). */
+	uint64_t reserved[2]; /**< Reserved for future fields */
+} __rte_cache_aligned;
+
+/**
+ * @internal
+ * The generic data structure associated with each DMA device.
+ *
+ * The dataplane APIs are located at the beginning of the structure, along
+ * with the pointer to where all the data elements for the particular device
+ * are stored in shared memory. This split scheme allows the function pointer
+ * and driver data to be per-process, while the actual configuration data for
+ * the device is shared.
+ * And the 'dev_private' field was placed in the first cache line to optimize
+ * performance because the PMD driver mainly depends on this field.
+ */
+struct rte_dmadev {
+	rte_dmadev_copy_t copy;
+	rte_dmadev_copy_sg_t copy_sg;
+	rte_dmadev_fill_t fill;
+	rte_dmadev_submit_t submit;
+	rte_dmadev_completed_t completed;
+	rte_dmadev_completed_status_t completed_status;
+	void *reserved_ptr; /**< Reserved for future IO function. */
+	void *dev_private;
+	/**< PMD-specific private data.
+	 *
+	 * - If is the primary process, after dmadev allocated by
+	 * rte_dmadev_pmd_allocate(), the PCI/SoC device probing should
+	 * initialize this field, and copy it's value to the 'dev_private'
+	 * field of 'struct rte_dmadev_data' which pointer by 'data' filed.
+	 *
+	 * - If is the secondary process, dmadev framework will initialize this
+	 * field by copy from 'dev_private' field of 'struct rte_dmadev_data'
+	 * which initialized by primary process.
+	 *
+	 * @note It's the primary process responsibility to deinitialize this
+	 * field after invoke rte_dmadev_pmd_release() in the PCI/SoC device
+	 * removing stage.
+	 */
+	struct rte_dmadev_data *data; /**< Pointer to device data. */
+	const struct rte_dmadev_ops *dev_ops; /**< Functions exported by PMD. */
+	struct rte_device *device;
+	/**< Device info which supplied during device initialization. */
+	enum rte_dmadev_state state; /**< Flag indicating the device state. */
+	uint64_t reserved[2]; /**< Reserved for future fields. */
+} __rte_cache_aligned;
+
+extern struct rte_dmadev rte_dmadevices[];
+
+#endif /* _RTE_DMADEV_CORE_H_ */
diff --git a/lib/dmadev/rte_dmadev_pmd.h b/lib/dmadev/rte_dmadev_pmd.h
new file mode 100644
index 0000000..45141f9
--- /dev/null
+++ b/lib/dmadev/rte_dmadev_pmd.h
@@ -0,0 +1,72 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2021 HiSilicon Limited.
+ */
+
+#ifndef _RTE_DMADEV_PMD_H_
+#define _RTE_DMADEV_PMD_H_
+
+/**
+ * @file
+ *
+ * RTE DMA Device PMD APIs
+ *
+ * Driver facing APIs for a DMA device. These are not to be called directly by
+ * any application.
+ */
+
+#include "rte_dmadev.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @internal
+ * Allocates a new dmadev slot for an DMA device and returns the pointer
+ * to that slot for the driver to use.
+ *
+ * @param name
+ *   DMA device name.
+ *
+ * @return
+ *   A pointer to the DMA device slot case of success,
+ *   NULL otherwise.
+ */
+__rte_internal
+struct rte_dmadev *
+rte_dmadev_pmd_allocate(const char *name);
+
+/**
+ * @internal
+ * Release the specified dmadev.
+ *
+ * @param dev
+ *   Device to be released.
+ *
+ * @return
+ *   - 0 on success, negative on error
+ */
+__rte_internal
+int
+rte_dmadev_pmd_release(struct rte_dmadev *dev);
+
+/**
+ * @internal
+ * Return the DMA device based on the device name.
+ *
+ * @param name
+ *   DMA device name.
+ *
+ * @return
+ *   A pointer to the DMA device slot case of success,
+ *   NULL otherwise.
+ */
+__rte_internal
+struct rte_dmadev *
+rte_dmadev_get_device_by_name(const char *name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_DMADEV_PMD_H_ */
diff --git a/lib/dmadev/version.map b/lib/dmadev/version.map
new file mode 100644
index 0000000..0f2ed4b
--- /dev/null
+++ b/lib/dmadev/version.map
@@ -0,0 +1,37 @@ 
+EXPERIMENTAL {
+	global:
+
+	rte_dmadev_close;
+	rte_dmadev_completed;
+	rte_dmadev_completed_status;
+	rte_dmadev_configure;
+	rte_dmadev_copy;
+	rte_dmadev_copy_sg;
+	rte_dmadev_count;
+	rte_dmadev_dump;
+	rte_dmadev_fill;
+	rte_dmadev_get_dev_id;
+	rte_dmadev_info_get;
+	rte_dmadev_is_valid_dev;
+	rte_dmadev_selftest;
+	rte_dmadev_start;
+	rte_dmadev_stats_get;
+	rte_dmadev_stats_reset;
+	rte_dmadev_stop;
+	rte_dmadev_submit;
+	rte_dmadev_vchan_setup;
+
+	local: *;
+};
+
+INTERNAL {
+        global:
+
+	rte_dmadevices;
+	rte_dmadev_get_device_by_name;
+	rte_dmadev_pmd_allocate;
+	rte_dmadev_pmd_release;
+
+	local: *;
+};
+
diff --git a/lib/meson.build b/lib/meson.build
index 1673ca4..68d239f 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -60,6 +60,7 @@  libraries = [
         'bpf',
         'graph',
         'node',
+        'dmadev',
 ]
 
 if is_windows