[dpdk-dev] [PATCH 1/6] dma/dpaa: introduce DPAA DMA driver

[Gagandeep Singh <g.singh@nxp.com>]

The DPAA DMA  driver is an implementation of the dmadev APIs,
that provide means to initiate a DMA transaction from CPU.
The initiated DMA is performed without CPU being involved
in the actual DMA transaction. This is achieved via using
the QDMA controller of DPAA SoC.

Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
---
 MAINTAINERS                            | 10 +++++++++
 doc/guides/rel_notes/release_21_11.rst |  3 +++
 drivers/bus/dpaa/dpaa_bus.c            | 22 ++++++++++++++++++++
 drivers/bus/dpaa/rte_dpaa_bus.h        |  5 +++++
 drivers/common/dpaax/dpaa_list.h       |  2 ++
 drivers/dma/dpaa/dpaa_qdma.c           | 28 ++++++++++++++++++++++++++
 drivers/dma/dpaa/meson.build           | 14 +++++++++++++
 drivers/dma/dpaa/version.map           |  4 ++++
 drivers/dma/meson.build                |  1 +
 9 files changed, 89 insertions(+)
 create mode 100644 drivers/dma/dpaa/dpaa_qdma.c
 create mode 100644 drivers/dma/dpaa/meson.build
 create mode 100644 drivers/dma/dpaa/version.map

diff --git a/MAINTAINERS b/MAINTAINERS
index 266f5ac1da..e3113b2e7e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1341,6 +1341,16 @@ F: doc/guides/rawdevs/ntb.rst
 F: examples/ntb/
 F: doc/guides/sample_app_ug/ntb.rst
 
+
+Dmadev Drivers
+--------------
+
+NXP DPAA DMA
+M: Gagandeep Singh <g.singh@nxp.com>
+M: Nipun Gupta <nipun.gupta@nxp.com>
+F: drivers/dma/dpaa/
+
+
 Packet processing
 -----------------
 
diff --git a/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst
index d707a554ef..d322bc93af 100644
--- a/doc/guides/rel_notes/release_21_11.rst
+++ b/doc/guides/rel_notes/release_21_11.rst
@@ -55,6 +55,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added NXP DPAA DMA driver.**
+
+  * Added a new dmadev driver for NXP DPAA platform.
 
 Removed Items
 -------------
diff --git a/drivers/bus/dpaa/dpaa_bus.c b/drivers/bus/dpaa/dpaa_bus.c
index e499305d85..09cd30d41c 100644
--- a/drivers/bus/dpaa/dpaa_bus.c
+++ b/drivers/bus/dpaa/dpaa_bus.c
@@ -232,6 +232,28 @@ dpaa_create_device_list(void)
 
 	rte_dpaa_bus.device_count += i;
 
+	/* Creating QDMA Device */
+	for (i = 0; i < RTE_DPAA_QDMA_DEVICES; i++) {
+		dev = calloc(1, sizeof(struct rte_dpaa_device));
+		if (!dev) {
+			DPAA_BUS_LOG(ERR, "Failed to allocate QDMA device");
+			ret = -1;
+			goto cleanup;
+		}
+
+		dev->device_type = FSL_DPAA_QDMA;
+		dev->id.dev_id = rte_dpaa_bus.device_count + i;
+
+		memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
+		sprintf(dev->name, "dpaa_qdma-%d", i+1);
+		DPAA_BUS_LOG(INFO, "%s qdma device added", dev->name);
+		dev->device.name = dev->name;
+		dev->device.devargs = dpaa_devargs_lookup(dev);
+
+		dpaa_add_to_device_list(dev);
+	}
+	rte_dpaa_bus.device_count += i;
+
 	return 0;
 
 cleanup:
diff --git a/drivers/bus/dpaa/rte_dpaa_bus.h b/drivers/bus/dpaa/rte_dpaa_bus.h
index 48d5cf4625..678a126154 100644
--- a/drivers/bus/dpaa/rte_dpaa_bus.h
+++ b/drivers/bus/dpaa/rte_dpaa_bus.h
@@ -61,6 +61,9 @@ dpaa_seqn(struct rte_mbuf *mbuf)
 /** Device driver supports link state interrupt */
 #define RTE_DPAA_DRV_INTR_LSC  0x0008
 
+/** Number of supported QDMA devices */
+#define RTE_DPAA_QDMA_DEVICES  1
+
 #define RTE_DEV_TO_DPAA_CONST(ptr) \
 	container_of(ptr, const struct rte_dpaa_device, device)
 
@@ -76,6 +79,7 @@ TAILQ_HEAD(rte_dpaa_driver_list, rte_dpaa_driver);
 enum rte_dpaa_type {
 	FSL_DPAA_ETH = 1,
 	FSL_DPAA_CRYPTO,
+	FSL_DPAA_QDMA
 };
 
 struct rte_dpaa_bus {
@@ -98,6 +102,7 @@ struct rte_dpaa_device {
 	union {
 		struct rte_eth_dev *eth_dev;
 		struct rte_cryptodev *crypto_dev;
+		struct rte_dmadev *dmadev;
 	};
 	struct rte_dpaa_driver *driver;
 	struct dpaa_device_id id;
diff --git a/drivers/common/dpaax/dpaa_list.h b/drivers/common/dpaax/dpaa_list.h
index e94575982b..319a3562ab 100644
--- a/drivers/common/dpaax/dpaa_list.h
+++ b/drivers/common/dpaax/dpaa_list.h
@@ -35,6 +35,8 @@ do { \
 	const struct list_head *__p298 = (p); \
 	((__p298->next == __p298) && (__p298->prev == __p298)); \
 })
+#define list_first_entry(ptr, type, member) \
+	list_entry((ptr)->next, type, member)
 #define list_add(p, l) \
 do { \
 	struct list_head *__p298 = (p); \
diff --git a/drivers/dma/dpaa/dpaa_qdma.c b/drivers/dma/dpaa/dpaa_qdma.c
new file mode 100644
index 0000000000..2ef3ee0c35
--- /dev/null
+++ b/drivers/dma/dpaa/dpaa_qdma.c
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2021 NXP
+ */
+
+#include <rte_dpaa_bus.h>
+
+static int
+dpaa_qdma_probe(__rte_unused struct rte_dpaa_driver *dpaa_drv,
+		__rte_unused struct rte_dpaa_device *dpaa_dev)
+{
+	return 0;
+}
+
+static int
+dpaa_qdma_remove(__rte_unused struct rte_dpaa_device *dpaa_dev)
+{
+	return 0;
+}
+
+static struct rte_dpaa_driver rte_dpaa_qdma_pmd;
+
+static struct rte_dpaa_driver rte_dpaa_qdma_pmd = {
+	.drv_type = FSL_DPAA_QDMA,
+	.probe = dpaa_qdma_probe,
+	.remove = dpaa_qdma_remove,
+};
+
+RTE_PMD_REGISTER_DPAA(dpaa_qdma, rte_dpaa_qdma_pmd);
diff --git a/drivers/dma/dpaa/meson.build b/drivers/dma/dpaa/meson.build
new file mode 100644
index 0000000000..9ab0862ede
--- /dev/null
+++ b/drivers/dma/dpaa/meson.build
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2021 NXP
+
+if not is_linux
+	build = false
+	reason = 'only supported on linux'
+endif
+
+deps += ['dmadev', 'bus_dpaa']
+sources = files('dpaa_qdma.c')
+
+if cc.has_argument('-Wno-pointer-arith')
+	cflags += '-Wno-pointer-arith'
+endif
diff --git a/drivers/dma/dpaa/version.map b/drivers/dma/dpaa/version.map
new file mode 100644
index 0000000000..7bab7bea48
--- /dev/null
+++ b/drivers/dma/dpaa/version.map
@@ -0,0 +1,4 @@
+DPDK_22 {
+
+	local: *;
+};
diff --git a/drivers/dma/meson.build b/drivers/dma/meson.build
index 0c2c34cd00..2f22d65215 100644
--- a/drivers/dma/meson.build
+++ b/drivers/dma/meson.build
@@ -7,5 +7,6 @@ endif
 
 drivers = [
         'skeleton',
+	'dpaa',
 ]
 std_deps = ['dmadev']
-- 
2.25.1