[dpdk-dev] [PATCH v3 28/32] raw/cnxk_bphy: support for interrupt init and cleanup

[Tomasz Duszynski <tduszynski@marvell.com>]

Add support for interrupt initialization and cleanup. Internally
interrupt initialization performs low level setup that allows
custom interrupt handler registration later on.

Interrupt initialization and cleanup are related hence they
are in the same patch.

Signed-off-by: Jakub Palider <jpalider@marvell.com>
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Reviewed-by: Jerin Jacob <jerinj@marvell.com>
---
 doc/guides/rawdevs/cnxk_bphy.rst      | 20 ++++++++++++
 drivers/raw/cnxk_bphy/cnxk_bphy.c     |  6 ++++
 drivers/raw/cnxk_bphy/cnxk_bphy_irq.c | 47 +++++++++++++++++++++++++++
 drivers/raw/cnxk_bphy/cnxk_bphy_irq.h |  5 +++
 drivers/raw/cnxk_bphy/meson.build     |  1 +
 drivers/raw/cnxk_bphy/rte_pmd_bphy.h  | 41 +++++++++++++++++++++++
 6 files changed, 120 insertions(+)
 create mode 100644 drivers/raw/cnxk_bphy/cnxk_bphy_irq.c

diff --git a/doc/guides/rawdevs/cnxk_bphy.rst b/doc/guides/rawdevs/cnxk_bphy.rst
index 120f953fb..b69c5f39a 100644
--- a/doc/guides/rawdevs/cnxk_bphy.rst
+++ b/doc/guides/rawdevs/cnxk_bphy.rst
@@ -37,6 +37,9 @@ To perform data transfer use standard ``rte_rawdev_enqueue_buffers()`` and
 ``rte_rawdev_dequeue_buffers()`` APIs. Not all messages produce sensible
 responses hence dequeueing is not always necessary.
 
+BPHY CGX/RPM PMD
+----------------
+
 BPHY CGX/RPM PMD accepts ``struct cnxk_bphy_cgx_msg`` messages which differ by type and payload.
 Message types along with description are listed below. As for the usage examples please refer to
 ``cnxk_bphy_cgx_dev_selftest()``.
@@ -95,6 +98,23 @@ Message must have type set to ``CNXK_BPHY_CGX_MSG_TYPE_START_RXTX`` or
 ``CNXK_BPHY_CGX_MSG_TYPE_STOP_RXTX``. Former will enable traffic while the latter will
 do the opposite.
 
+BPHY PMD
+--------
+
+BPHY PMD accepts ``struct cnxk_bphy_irq_msg`` messages which differ by type and payload.
+Message types along with description are listed below. For some usage examples please refer to
+``bphy_rawdev_selftest()``.
+
+Initialize or finalize interrupt handling
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Message is used to setup low level interrupt handling.
+
+Message must have type set to ``CNXK_BPHY_IRQ_MSG_TYPE_INIT`` or ``CNXK_BPHY_IRQ_MSG_TYPE_FINI``.
+The former will setup low level interrupt handling while the latter will tear everything down. There
+are also two convenience functions namely ``rte_pmd_bphy_intr_init()`` and
+``rte_pmd_bphy_intr_fini()`` that take care of all details.
+
 Self test
 ---------
 
diff --git a/drivers/raw/cnxk_bphy/cnxk_bphy.c b/drivers/raw/cnxk_bphy/cnxk_bphy.c
index 7e541bac4..3f8679534 100644
--- a/drivers/raw/cnxk_bphy/cnxk_bphy.c
+++ b/drivers/raw/cnxk_bphy/cnxk_bphy.c
@@ -47,6 +47,12 @@ cnxk_bphy_irq_enqueue_bufs(struct rte_rawdev *dev,
 		return 0;
 
 	switch (msg->type) {
+	case CNXK_BPHY_IRQ_MSG_TYPE_INIT:
+		ret = cnxk_bphy_intr_init(dev->dev_id);
+		break;
+	case CNXK_BPHY_IRQ_MSG_TYPE_FINI:
+		cnxk_bphy_intr_fini(dev->dev_id);
+		break;
 	default:
 		ret = -EINVAL;
 	}
diff --git a/drivers/raw/cnxk_bphy/cnxk_bphy_irq.c b/drivers/raw/cnxk_bphy/cnxk_bphy_irq.c
new file mode 100644
index 000000000..c4df539cd
--- /dev/null
+++ b/drivers/raw/cnxk_bphy/cnxk_bphy_irq.c
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2021 Marvell.
+ */
+#include <rte_bus_pci.h>
+#include <rte_pci.h>
+#include <rte_rawdev.h>
+#include <rte_rawdev_pmd.h>
+
+#include <roc_api.h>
+#include <roc_bphy_irq.h>
+
+#include "cnxk_bphy_irq.h"
+
+static struct bphy_device *
+cnxk_bphy_get_bphy_dev_by_dev_id(uint16_t dev_id)
+{
+	struct rte_rawdev *rawdev;
+
+	if (!rte_rawdev_pmd_is_valid_dev(dev_id))
+		return NULL;
+
+	rawdev = &rte_rawdevs[dev_id];
+
+	return (struct bphy_device *)rawdev->dev_private;
+}
+
+int
+cnxk_bphy_intr_init(uint16_t dev_id)
+{
+	struct bphy_device *bphy_dev = cnxk_bphy_get_bphy_dev_by_dev_id(dev_id);
+
+	bphy_dev->irq_chip = roc_bphy_intr_init();
+	if (bphy_dev->irq_chip == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void
+cnxk_bphy_intr_fini(uint16_t dev_id)
+{
+	struct bphy_device *bphy_dev = cnxk_bphy_get_bphy_dev_by_dev_id(dev_id);
+	struct roc_bphy_irq_chip *irq_chip = bphy_dev->irq_chip;
+
+	roc_bphy_intr_fini(irq_chip);
+	bphy_dev->irq_chip = NULL;
+}
diff --git a/drivers/raw/cnxk_bphy/cnxk_bphy_irq.h b/drivers/raw/cnxk_bphy/cnxk_bphy_irq.h
index 16243efc9..3acc47fe8 100644
--- a/drivers/raw/cnxk_bphy/cnxk_bphy_irq.h
+++ b/drivers/raw/cnxk_bphy/cnxk_bphy_irq.h
@@ -10,6 +10,8 @@
 
 #include <roc_api.h>
 
+typedef void (*cnxk_bphy_intr_handler_t)(int irq_num, void *isr_data);
+
 struct bphy_mem {
 	struct rte_mem_resource res0;
 	struct rte_mem_resource res2;
@@ -27,4 +29,7 @@ struct bphy_device {
 	struct bphy_irq_queue queues[1];
 };
 
+int cnxk_bphy_intr_init(uint16_t dev_id);
+void cnxk_bphy_intr_fini(uint16_t dev_id);
+
 #endif /* _CNXK_BPHY_IRQ_ */
diff --git a/drivers/raw/cnxk_bphy/meson.build b/drivers/raw/cnxk_bphy/meson.build
index f2868fd68..14147feaf 100644
--- a/drivers/raw/cnxk_bphy/meson.build
+++ b/drivers/raw/cnxk_bphy/meson.build
@@ -7,5 +7,6 @@ sources = files(
         'cnxk_bphy.c',
         'cnxk_bphy_cgx.c',
         'cnxk_bphy_cgx_test.c',
+        'cnxk_bphy_irq.c',
 )
 headers = files('rte_pmd_bphy.h')
diff --git a/drivers/raw/cnxk_bphy/rte_pmd_bphy.h b/drivers/raw/cnxk_bphy/rte_pmd_bphy.h
index eb39654f1..c667d984e 100644
--- a/drivers/raw/cnxk_bphy/rte_pmd_bphy.h
+++ b/drivers/raw/cnxk_bphy/rte_pmd_bphy.h
@@ -5,6 +5,8 @@
 #ifndef _CNXK_BPHY_H_
 #define _CNXK_BPHY_H_
 
+#include "cnxk_bphy_irq.h"
+
 enum cnxk_bphy_cgx_msg_type {
 	CNXK_BPHY_CGX_MSG_TYPE_GET_LINKINFO,
 	CNXK_BPHY_CGX_MSG_TYPE_INTLBK_DISABLE,
@@ -101,6 +103,8 @@ struct cnxk_bphy_cgx_msg {
 	void *data;
 };
 
+#define CNXK_BPHY_DEF_QUEUE 0
+
 enum cnxk_bphy_irq_msg_type {
 	CNXK_BPHY_IRQ_MSG_TYPE_INIT,
 	CNXK_BPHY_IRQ_MSG_TYPE_FINI,
@@ -114,4 +118,41 @@ struct cnxk_bphy_irq_msg {
 	void *data;
 };
 
+struct cnxk_bphy_irq_info {
+	int irq_num;
+	cnxk_bphy_intr_handler_t handler;
+	void *data;
+	int cpu;
+};
+
+static __rte_always_inline int
+rte_pmd_bphy_intr_init(uint16_t dev_id)
+{
+	struct cnxk_bphy_irq_msg msg = {
+		.type = CNXK_BPHY_IRQ_MSG_TYPE_INIT,
+	};
+	struct rte_rawdev_buf *bufs[1];
+	struct rte_rawdev_buf buf;
+
+	buf.buf_addr = &msg;
+	bufs[0] = &buf;
+
+	return rte_rawdev_enqueue_buffers(dev_id, bufs, 1, CNXK_BPHY_DEF_QUEUE);
+}
+
+static __rte_always_inline void
+rte_pmd_bphy_intr_fini(uint16_t dev_id)
+{
+	struct cnxk_bphy_irq_msg msg = {
+		.type = CNXK_BPHY_IRQ_MSG_TYPE_FINI,
+	};
+	struct rte_rawdev_buf *bufs[1];
+	struct rte_rawdev_buf buf;
+
+	buf.buf_addr = &msg;
+	bufs[0] = &buf;
+
+	rte_rawdev_enqueue_buffers(dev_id, bufs, 1, CNXK_BPHY_DEF_QUEUE);
+}
+
 #endif /* _CNXK_BPHY_H_ */
-- 
2.25.1