@@ -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
-------------------
@@ -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
new file mode 100644
@@ -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')
new file mode 100644
@@ -0,0 +1,539 @@
+/* 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(rte_dmadev_logtype, lib.dmadev, 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') {
+ RTE_ASSERT(rte_dmadevices[i].state ==
+ RTE_DMADEV_UNUSED);
+ 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;
+ }
+
+ 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;
+ }
+
+ if (dmadev_shared_data_prepare() != 0) {
+ RTE_DMADEV_LOG(ERR, "Cannot allocate DMA shared data\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];
+ RTE_ASSERT(dev->data->dev_id == 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_bak;
+
+ 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_bak = dev->dev_private;
+ memset(dev, 0, sizeof(struct rte_dmadev));
+ if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+ dev->dev_private = dev_private_bak;
+ 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);
+}
+
+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;
+
+ 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 > info.max_vchans) {
+ RTE_DMADEV_LOG(ERR,
+ "Device %u configure too many vchans\n", dev_id);
+ 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;
+ }
+
+ 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;
+ uint8_t dir_all = RTE_DMA_DIR_MEM_TO_MEM | RTE_DMA_DIR_MEM_TO_DEV |
+ RTE_DMA_DIR_DEV_TO_MEM | RTE_DMA_DIR_DEV_TO_DEV;
+ int ret;
+
+ RTE_DMADEV_VALID_DEV_ID_OR_ERR_RET(dev_id, -EINVAL);
+ if (conf == NULL)
+ return -EINVAL;
+
+ dev = &rte_dmadevices[dev_id];
+
+ 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 == 0 ||
+ conf->direction & ~dir_all) {
+ 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_DMA_DEV_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_DMA_DEV_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_DMA_DEV_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_DMA_DEV_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;
+ }
+
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->vchan_setup, -ENOTSUP);
+ return (*dev->dev_ops->vchan_setup)(dev, conf);
+}
+
+int
+rte_dmadev_vchan_release(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) {
+ 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->vchan_release, -ENOTSUP);
+ return (*dev->dev_ops->vchan_release)(dev, vchan);
+}
+
+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);
+ 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);
+
+ 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);
+}
new file mode 100644
@@ -0,0 +1,1009 @@
+/* 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 channel, 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 mem-to-mem transfer
+ * scenario, and create virtual DMA channel 1 for mem-to-dev 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()), 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:
+ * a) The first part is the submission of operation requests:
+ * - rte_dmadev_copy()
+ * - rte_dmadev_copy_sg()
+ * - rte_dmadev_fill()
+ * - rte_dmadev_perform()
+ * 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 use 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.
+ * b) The second part is to obtain the result of requests:
+ * - rte_dmadev_completed()
+ * - return the number of operation requests completed successfully.
+ * - rte_dmadev_completed_fails()
+ * - return the number of operation requests failed to complete.
+ *
+ * About the ring_idx which rte_dmadev_copy/copy_sg/fill() returned,
+ * the rules are as follows:
+ * a) ring_idx for each virtual DMA channel are independent.
+ * b) For a virtual DMA channel, the ring_idx is monotonically incremented,
+ * when it reach UINT16_MAX, it wraps back to zero.
+ * c) This ring_idx can be used by applications to track per-operation
+ * metadata in an application-defined circular ring.
+ * d) 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.
+ * 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
+ * ...
+ *
+ * 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 object.
+ *
+ */
+
+#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.
+ *
+ * @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_DMA_DEV_CAPA_MEM_TO_MEM (1ull << 0)
+/**< DMA device support memory-to-memory transfer.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMA_DEV_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_DMA_DEV_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_DMA_DEV_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_DMA_DEV_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_DMA_DEV_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_DMA_DEV_CAPA_FENCE (1ull << 6)
+/**< DMA device support fence.
+ * If device support fence, then application could set a fence flags when
+ * enqueue operation by rte_dma_copy/copy_sg/fill().
+ * If a operation has a fence flags, it means the operation must be processed
+ * only after all previous operations are completed.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMA_DEV_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_DMA_DEV_CAPA_OPS_COPY_SG (1ull << 33)
+/**< DMA device support scatter-list copy ops.
+ *
+ * @see struct rte_dmadev_info::dev_capa
+ */
+
+#define RTE_DMA_DEV_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 an DMA device.
+ */
+struct rte_dmadev_info {
+ struct rte_device *device; /**< Generic Device information. */
+ uint64_t dev_capa; /**< Device capabilities (RTE_DMA_DEV_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().
+ */
+ uint8_t silent_mode;
+ /**< Indicates whether to work in silent mode.
+ * 0-default mode, 1-silent mode.
+ *
+ * @see RTE_DMA_DEV_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);
+
+/* DMA transfer direction defines. */
+#define RTE_DMA_DIR_MEM_TO_MEM (1ull << 0)
+/**< DMA transfer direction - from memory to memory.
+ *
+ * @see struct rte_dmadev_vchan_conf::direction
+ */
+
+#define RTE_DMA_DIR_MEM_TO_DEV (1ull << 1)
+/**< DMA transfer direction - from memory to device.
+ * In a typical scenario, ARM SoCs are installed on x86 servers as iNICs
+ * through the PCIE interface. In this case, the ARM SoCs works in EP(endpoint)
+ * mode, it could initiate a DMA move request from memory (which is ARM memory)
+ * to device (which is x86 host memory).
+ *
+ * @see struct rte_dmadev_vchan_conf::direction
+ */
+
+#define RTE_DMA_DIR_DEV_TO_MEM (1ull << 2)
+/**< DMA transfer direction - from device to memory.
+ * In a typical scenario, ARM SoCs are installed on x86 servers as iNICs
+ * through the PCIE interface. In this case, the ARM SoCs works in EP(endpoint)
+ * mode, it could initiate a DMA move request from device (which is x86 host
+ * memory) to memory (which is ARM memory).
+ *
+ * @see struct rte_dmadev_vchan_conf::direction
+ */
+
+#define RTE_DMA_DIR_DEV_TO_DEV (1ull << 3)
+/**< DMA transfer direction - from device to device.
+ * In a typical scenario, ARM SoCs are installed on x86 servers as iNICs
+ * through the PCIE interface. In this case, the ARM SoCs works in EP(endpoint)
+ * mode, it could initiate a DMA move request from device (which is x86 host
+ * memory) to device (which is another x86 host memory).
+ *
+ * @see struct rte_dmadev_vchan_conf::direction
+ */
+
+/**
+ * enum rte_dmadev_port_type - DMA port type defines
+ * When
+ */
+enum rte_dmadev_port_type {
+ RTE_DMADEV_PORT_PCIE = 1,
+};
+
+/**
+ * A structure used to descript DMA port parameters.
+ */
+struct rte_dmadev_port_param {
+ enum rte_dmadev_port_type port_type; /**< The device port type. */
+ union {
+ /** For PCIE port:
+ *
+ * The following model show SoC's PCIE module connects to
+ * multiple PCIE hosts and multiple endpoints. The PCIE module
+ * has an integrate 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.
+ *
+ * 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 |
+ * | | | | | ------
+ * | ----- ------------------
+ *
+ * The following structure is used to describe the above access
+ * port.
+ * @note: If some fields are not supported by hardware, set
+ * these fileds to zero. And also there are no
+ * capabilities defined for this, it is the duty of the
+ * application to set the correct parameters.
+ */
+ 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 {
+ uint8_t direction;
+ /**< Set of supported transfer directions
+ * @see RTE_DMA_DIR_MEM_TO_MEM
+ * @see RTE_DMA_DIR_MEM_TO_DEV
+ * @see RTE_DMA_DIR_DEV_TO_MEM
+ * @see RTE_DMA_DIR_DEV_TO_DEV
+ */
+
+ /** Number of descriptor for the virtual DMA channel */
+ uint16_t nb_desc;
+ /** 1) Used to describes the port parameter in the device-to-memory
+ * transfer scenario.
+ * 2) Used to describes the source port parameter in the
+ * device-to-device transfer scenario.
+ * @see struct rte_dmadev_port_param
+ */
+ struct rte_dmadev_port_param src_port;
+ /** 1) Used to describes the port parameter in the memory-to-device-to
+ * transfer scenario.
+ * 2) Used to describes the destination port parameter in the
+ * device-to-device transfer scenario.
+ * @see struct rte_dmadev_port_param
+ */
+ struct rte_dmadev_port_param dst_port;
+};
+
+/**
+ * @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);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Release a virtual DMA channel.
+ *
+ * @param dev_id
+ * The identifier of the device.
+ * @param vchan
+ * The identifier of virtual DMA channel which return by vchan setup.
+ *
+ * @return
+ * - =0: Successfully release the virtual DMA channel.
+ * - <0: Error code returned by the driver virtual channel release function.
+ */
+__rte_experimental
+int
+rte_dmadev_vchan_release(uint16_t dev_id, uint16_t vchan);
+
+/**
+ * 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);
+
+/* DMA transfer result status code defines */
+enum rte_dma_status_code {
+ RTE_DMA_STATUS_SUCCESSFUL = 0,
+ /**< 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_ATTEMPED,
+ /**< 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 mem-to-dev/dev-to-mem/
+ * dev-to-dev transfer scenario.
+ */
+ RTE_DMA_STATUS_UNKNOWN,
+ /**< The operation failed to complete due unknown reason. */
+};
+
+/**
+ * rte_dmadev_sge - can hold scatter DMA operation request entry
+ */
+struct rte_dmadev_sge {
+ rte_iova_t addr;
+ uint32_t length;
+};
+
+/**
+ * rte_dmadev_sg - can hold scatter DMA operation request
+ */
+struct rte_dmadev_sg {
+ struct rte_dmadev_sge *src;
+ struct rte_dmadev_sge *dst;
+ uint16_t nb_src; /**< The number of src entry */
+ uint16_t nb_dst; /**< The number of dst entry */
+};
+
+#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.
+ *
+ * @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.
+ * This 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 hardware to begin
+ * this operation, otherwise do not trigger hardware.
+ *
+ * @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)
+ 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 hardware
+ * to begin this operation, otherwise do not trigger hardware.
+ *
+ * @param dev_id
+ * The identifier of the device.
+ * @param vchan
+ * The identifier of virtual DMA channel.
+ * @param sg
+ * The pointer of scatterlist.
+ * @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,
+ const struct rte_dmadev_sg *sg,
+ 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 ||
+ sg == NULL || sg->src == NULL || sg->dst == NULL ||
+ sg->nb_src == 0 || sg->nb_dst == 0)
+ return -EINVAL;
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->copy_sg, -ENOTSUP);
+#endif
+ return (*dev->copy_sg)(dev, vchan, sg, 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 hardware to begin
+ * this operation, otherwise do not trigger hardware.
+ *
+ * @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)
+ 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.
+ */
+__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 -EINVAL;
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->completed, -ENOTSUP);
+#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
+ * The error code of operations that completed.
+ * @see enum rte_dma_status_code
+ *
+ * @return
+ * The number of operations that failed to complete.
+ */
+__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 -EINVAL;
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->completed_status, -ENOTSUP);
+#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_ */
new file mode 100644
@@ -0,0 +1,180 @@
+/* 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_vchan_release_t)(struct rte_dmadev *dev,
+ uint16_t vchan);
+/** @internal Used to release 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_sg *sg,
+ 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_vchan_release_t vchan_release;
+ 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.
+ */
+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.
+ * It's the primay process's 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_ */
new file mode 100644
@@ -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_ */
new file mode 100644
@@ -0,0 +1,37 @@
+EXPERIMENTAL {
+ global:
+
+ rte_dmadev_close;
+ rte_dmadev_completed;
+ rte_dmadev_completed_fails;
+ rte_dmadev_configure;
+ rte_dmadev_copy;
+ rte_dmadev_copy_sg;
+ rte_dmadev_count;
+ rte_dmadev_dump;
+ rte_dmadev_fill;
+ 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_release;
+ rte_dmadev_vchan_setup;
+
+ local: *;
+};
+
+INTERNAL {
+ global:
+
+ rte_dmadevices;
+ rte_dmadev_get_device_by_name;
+ rte_dmadev_pmd_allocate;
+ rte_dmadev_pmd_release;
+
+ local: *;
+};
+
@@ -60,6 +60,7 @@ libraries = [
'bpf',
'graph',
'node',
+ 'dmadev',
]
if is_windows