[PATCH 5/9] raw/cnxk_rvu_lf: register/unregister interrupt handler

[Akhil Goyal <gakhil@marvell.com>]

Added PMD API rte_pmd_rvu_lf_irq_register() and
rte_pmd_rvu_lf_irq_unregister() to register/unregister
interrupt handlers for rvu lf raw device.

Signed-off-by: Akhil Goyal <gakhil@marvell.com>
---
 doc/guides/rawdevs/cnxk_rvu_lf.rst       |  8 +++++
 drivers/common/cnxk/roc_rvu_lf.c         | 26 ++++++++++++++
 drivers/common/cnxk/roc_rvu_lf.h         |  5 +++
 drivers/common/cnxk/version.map          |  2 ++
 drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c    | 30 ++++++++++++++++
 drivers/raw/cnxk_rvu_lf/rte_pmd_rvu_lf.h | 46 ++++++++++++++++++++++++
 6 files changed, 117 insertions(+)

diff --git a/doc/guides/rawdevs/cnxk_rvu_lf.rst b/doc/guides/rawdevs/cnxk_rvu_lf.rst
index 6dfbd466ad..7bae6b523e 100644
--- a/doc/guides/rawdevs/cnxk_rvu_lf.rst
+++ b/doc/guides/rawdevs/cnxk_rvu_lf.rst
@@ -52,3 +52,11 @@ Get BAR addresses
 Application can retrieve PCI BAR addresses of the device using the API
 ``rte_pmd_rvu_lf_bar_get()``. This helps application to configure the
 registers of the hardware device.
+
+Register or remove interrupt handler
+------------------------------------
+
+Application can register interrupt handlers using ``rte_pmd_rvu_lf_irq_register()``
+or remove interrupt handler using ``rte_pmd_rvu_lf_irq_unregister()``.
+The irq numbers for which the interrupts are registered is negotiated separately
+and is not in scope of the driver.
diff --git a/drivers/common/cnxk/roc_rvu_lf.c b/drivers/common/cnxk/roc_rvu_lf.c
index 1ae39e746e..63bc149f2a 100644
--- a/drivers/common/cnxk/roc_rvu_lf.c
+++ b/drivers/common/cnxk/roc_rvu_lf.c
@@ -61,3 +61,29 @@ roc_rvu_lf_dev_fini(struct roc_rvu_lf *roc_rvu_lf)
 
 	return dev_fini(&rvu->dev, rvu->pci_dev);
 }
+
+int
+roc_rvu_lf_irq_register(struct roc_rvu_lf *roc_rvu_lf, unsigned int irq,
+			roc_rvu_lf_intr_cb_fn cb, void *data)
+{
+	struct rvu_lf *rvu = roc_rvu_lf_to_rvu_priv(roc_rvu_lf);
+	struct plt_intr_handle *handle;
+
+	handle = rvu->pci_dev->intr_handle;
+
+	return dev_irq_register(handle, (plt_intr_callback_fn)cb, data, irq);
+}
+
+int
+roc_rvu_lf_irq_unregister(struct roc_rvu_lf *roc_rvu_lf, unsigned int irq,
+			  roc_rvu_lf_intr_cb_fn cb, void *data)
+{
+	struct rvu_lf *rvu = roc_rvu_lf_to_rvu_priv(roc_rvu_lf);
+	struct plt_intr_handle *handle;
+
+	handle = rvu->pci_dev->intr_handle;
+
+	dev_irq_unregister(handle, (plt_intr_callback_fn)cb, data, irq);
+
+	return 0;
+}
diff --git a/drivers/common/cnxk/roc_rvu_lf.h b/drivers/common/cnxk/roc_rvu_lf.h
index 7ce8065a8b..800bf4e674 100644
--- a/drivers/common/cnxk/roc_rvu_lf.h
+++ b/drivers/common/cnxk/roc_rvu_lf.h
@@ -21,4 +21,9 @@ TAILQ_HEAD(roc_rvu_lf_head, roc_rvu_lf);
 int __roc_api roc_rvu_lf_dev_init(struct roc_rvu_lf *roc_rvu_lf);
 int __roc_api roc_rvu_lf_dev_fini(struct roc_rvu_lf *roc_rvu_lf);
 
+typedef void (*roc_rvu_lf_intr_cb_fn)(void *cb_arg);
+int __roc_api roc_rvu_lf_irq_register(struct roc_rvu_lf *roc_rvu_lf, unsigned int irq,
+				      roc_rvu_lf_intr_cb_fn cb, void *cb_arg);
+int __roc_api roc_rvu_lf_irq_unregister(struct roc_rvu_lf *roc_rvu_lf, unsigned int irq,
+					roc_rvu_lf_intr_cb_fn cb, void *cb_arg);
 #endif /* _ROC_RVU_LF_H_ */
diff --git a/drivers/common/cnxk/version.map b/drivers/common/cnxk/version.map
index 1f593febc3..a948729688 100644
--- a/drivers/common/cnxk/version.map
+++ b/drivers/common/cnxk/version.map
@@ -548,5 +548,7 @@ INTERNAL {
 	roc_ree_rule_db_prog;
 	roc_rvu_lf_dev_fini;
 	roc_rvu_lf_dev_init;
+	roc_rvu_lf_irq_register;
+	roc_rvu_lf_irq_unregister;
 	local: *;
 };
diff --git a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
index fc9facd852..b4b6c34eb3 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
@@ -15,6 +15,36 @@
 
 #include "rte_pmd_rvu_lf.h"
 
+int
+rte_pmd_rvu_lf_irq_register(uint8_t dev_id, unsigned int irq,
+			    rte_pmd_rvu_lf_intr_callback_fn cb, void *data)
+{
+	struct rte_rawdev *rawdev = rte_rawdev_pmd_get_dev(dev_id);
+	struct roc_rvu_lf *roc_rvu_lf;
+
+	if (rawdev == NULL)
+		return -EINVAL;
+
+	roc_rvu_lf = (struct roc_rvu_lf *)rawdev->dev_private;
+
+	return roc_rvu_lf_irq_register(roc_rvu_lf, irq, (roc_rvu_lf_intr_cb_fn)cb, data);
+}
+
+int
+rte_pmd_rvu_lf_irq_unregister(uint8_t dev_id, unsigned int irq,
+			      rte_pmd_rvu_lf_intr_callback_fn cb, void *data)
+{
+	struct rte_rawdev *rawdev = rte_rawdev_pmd_get_dev(dev_id);
+	struct roc_rvu_lf *roc_rvu_lf;
+
+	if (rawdev == NULL)
+		return -EINVAL;
+
+	roc_rvu_lf = (struct roc_rvu_lf *)rawdev->dev_private;
+
+	return roc_rvu_lf_irq_unregister(roc_rvu_lf, irq, (roc_rvu_lf_intr_cb_fn)cb, data);
+}
+
 int
 rte_pmd_rvu_lf_bar_get(uint8_t dev_id, uint8_t bar_num, size_t *va, size_t *mask)
 {
diff --git a/drivers/raw/cnxk_rvu_lf/rte_pmd_rvu_lf.h b/drivers/raw/cnxk_rvu_lf/rte_pmd_rvu_lf.h
index 50b43b1785..e39133f879 100644
--- a/drivers/raw/cnxk_rvu_lf/rte_pmd_rvu_lf.h
+++ b/drivers/raw/cnxk_rvu_lf/rte_pmd_rvu_lf.h
@@ -32,6 +32,52 @@ extern int cnxk_logtype_rvu_lf;
 	rte_log(RTE_LOG_ ## level, cnxk_logtype_rvu_lf, \
 		"%s(): " fmt "\n", __func__, ## args)
 
+/**
+ * Signature of callback function called when an interrupt is received on RVU LF device.
+ *
+ * @param cb_arg
+ *   pointer to the information received on an interrupt
+ */
+typedef void (*rte_pmd_rvu_lf_intr_callback_fn)(void *cb_arg);
+
+/**
+ * Register interrupt callback
+ *
+ * Registers an interrupt callback to be executed when interrupt is raised.
+ *
+ * @param dev_id
+ *   device id of RVU LF device
+ * @param irq
+ *   interrupt number for which interrupt will be raised
+ * @param cb
+ *   callback function to be executed
+ * @param cb_arg
+ *   argument to be passed to callback function
+ *
+ * @return 0 on success, negative value otherwise
+ */
+__rte_experimental
+int rte_pmd_rvu_lf_irq_register(uint8_t dev_id, unsigned int irq,
+				rte_pmd_rvu_lf_intr_callback_fn cb, void *cb_arg);
+
+/**
+ * Unregister interrupt callback
+ *
+ * @param dev_id
+ *   device id of RVU LF device
+ * @param irq
+ *   interrupt number
+ * @param cb
+ *   callback function registered
+ * @param cb_arg
+ *   argument to be passed to callback function
+ *
+ * @return 0 on success, negative value otherwise
+ */
+__rte_experimental
+int rte_pmd_rvu_lf_irq_unregister(uint8_t dev_id, unsigned int irq,
+				  rte_pmd_rvu_lf_intr_callback_fn cb, void *cb_arg);
+
 /**
  * Obtain NPA PF func
  *
-- 
2.25.1