[PATCH v4 3/9] raw/cnxk_rvu_lf: register/unregister interrupt handler

[Akhil Goyal]

Added 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 at 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/cnxk_rvu_lf_driver.h | 46 ++++++++++++++++++++
 drivers/raw/cnxk_rvu_lf/version.map          |  2 +
 7 files changed, 119 insertions(+)

diff --git a/doc/guides/rawdevs/cnxk_rvu_lf.rst b/doc/guides/rawdevs/cnxk_rvu_lf.rst
index 13184ad4dc..52e4f12e3c 100644
--- a/doc/guides/rawdevs/cnxk_rvu_lf.rst
+++ b/doc/guides/rawdevs/cnxk_rvu_lf.rst
@@ -45,3 +45,11 @@ Get NPA and SSO PF FUNC
 APIs ``rte_pmd_rvu_lf_npa_pf_func_get()`` and ``rte_pmd_rvu_lf_sso_pf_func_get()``
 can be used to get the cnxk NPA PF func and SSO PF func which application
 can use for NPA/SSO specific configuration.
+
+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 d4c3e6c425..4e687c1cb8 100644
--- a/drivers/common/cnxk/version.map
+++ b/drivers/common/cnxk/version.map
@@ -551,5 +551,7 @@ 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 c8490ccbab..c108931f97 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
@@ -16,6 +16,36 @@
 #include "cnxk_rvu_lf.h"
 #include "cnxk_rvu_lf_driver.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);
+}
+
 uint16_t
 rte_pmd_rvu_lf_npa_pf_func_get(void)
 {
diff --git a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
index 3837a6066d..61bbcb7c04 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
@@ -40,6 +40,52 @@ uint16_t rte_pmd_rvu_lf_npa_pf_func_get(void);
 __rte_internal
 uint16_t rte_pmd_rvu_lf_sso_pf_func_get(void);
 
+/**
+ * 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_internal
+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_internal
+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);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/drivers/raw/cnxk_rvu_lf/version.map b/drivers/raw/cnxk_rvu_lf/version.map
index 3b81544aac..a2e8a2c9b3 100644
--- a/drivers/raw/cnxk_rvu_lf/version.map
+++ b/drivers/raw/cnxk_rvu_lf/version.map
@@ -1,6 +1,8 @@
 INTERNAL {
 	global:
 
+	rte_pmd_rvu_lf_irq_register;
+	rte_pmd_rvu_lf_irq_unregister;
 	rte_pmd_rvu_lf_npa_pf_func_get;
 	rte_pmd_rvu_lf_sso_pf_func_get;
 
-- 
2.25.1