This patch introduce DMA device library internal header, which contains
internal data types that are used by the DMA devices in order to expose
their ops to the class.
Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
Acked-by: Bruce Richardson <bruce.richard...@intel.com>
Acked-by: Morten Brørup <m...@smartsharesystems.com>
Reviewed-by: Kevin Laatz <kevin.la...@intel.com>
Reviewed-by: Conor Walsh <conor.wa...@intel.com>
---
lib/dmadev/meson.build | 1 +
lib/dmadev/rte_dmadev_core.h | 185 +++++++++++++++++++++++++++++++++++
2 files changed, 186 insertions(+)
create mode 100644 lib/dmadev/rte_dmadev_core.h
diff --git a/lib/dmadev/meson.build b/lib/dmadev/meson.build
index 6d5bd85373..f421ec1909 100644
--- a/lib/dmadev/meson.build
+++ b/lib/dmadev/meson.build
@@ -2,3 +2,4 @@
# Copyright(c) 2021 HiSilicon Limited.
headers = files('rte_dmadev.h')
+indirect_headers += files('rte_dmadev_core.h')
diff --git a/lib/dmadev/rte_dmadev_core.h b/lib/dmadev/rte_dmadev_core.h
new file mode 100644
index 0000000000..cbf5e88621
--- /dev/null
+++ b/lib/dmadev/rte_dmadev_core.h
@@ -0,0 +1,185 @@
+/* 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,
+ uint32_t conf_sz);
+/**< @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, uint16_t vchan,
+ const struct rte_dmadev_vchan_conf *conf,
+ uint32_t conf_sz);
+/**< @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_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-gather 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;
+};
+
+/**
+ * @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 {
+ 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.
+ */
+ 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_cl0;
+ void *reserved_cl1[6];
+ /**< Reserve space for future IO functions, while keeping data and
+ * dev_ops pointers on the second cacheline.
+ */
+ 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;
+
+#endif /* _RTE_DMADEV_CORE_H_ */
--
2.33.0
