[PATCH v5 8/9] raw/cnxk_rvu_lf: add API to get BAR addresses

[Akhil Goyal <gakhil@marvell.com>]

Added rte_pmd_rvu_lf_bar_get() API to get BAR address
for application to configure hardware.

Signed-off-by: Akhil Goyal <gakhil@marvell.com>
---
 doc/guides/rawdevs/cnxk_rvu_lf.rst           |  7 ++++++
 drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c        | 24 ++++++++++++++++++++
 drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h | 18 +++++++++++++++
 drivers/raw/cnxk_rvu_lf/version.map          |  1 +
 4 files changed, 50 insertions(+)

diff --git a/doc/guides/rawdevs/cnxk_rvu_lf.rst b/doc/guides/rawdevs/cnxk_rvu_lf.rst
index 51e1c58b69..a972654f82 100644
--- a/doc/guides/rawdevs/cnxk_rvu_lf.rst
+++ b/doc/guides/rawdevs/cnxk_rvu_lf.rst
@@ -73,3 +73,10 @@ and provides an opaque pointer for a response and its length.
 PF and VF application can define its own request and response based on the message id
 of the mailbox.
 For sample usage of the APIs, please refer to ``rvu_lf_rawdev_selftest()``.
+
+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.
diff --git a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
index 156b9460c1..3a3971ecd3 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
@@ -103,6 +103,30 @@ rte_pmd_rvu_lf_irq_unregister(uint8_t dev_id, unsigned int irq,
 	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)
+{
+	struct roc_rvu_lf *roc_rvu_lf;
+	struct rte_rawdev *rawdev;
+
+	rawdev = rte_rawdev_pmd_get_dev(dev_id);
+	if (rawdev == NULL)
+		return -EINVAL;
+
+	roc_rvu_lf = (struct roc_rvu_lf *)rawdev->dev_private;
+
+	if (bar_num > PCI_MAX_RESOURCE ||
+			(roc_rvu_lf->pci_dev->mem_resource[bar_num].addr == NULL)) {
+		*va = 0;
+		*mask = 0;
+		return -ENOTSUP;
+	}
+	*va = (size_t)(roc_rvu_lf->pci_dev->mem_resource[bar_num].addr);
+	*mask = (size_t)(roc_rvu_lf->pci_dev->mem_resource[bar_num].len - 1);
+
+	return 0;
+}
+
 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 22978f89af..922c852592 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
@@ -191,6 +191,24 @@ __rte_internal
 int rte_pmd_rvu_lf_msg_process(uint8_t dev_id, uint16_t vf, uint16_t msg_id,
 			       void *req, uint16_t req_len, void *rsp, uint16_t rsp_len);
 
+/**
+ * Get BAR addresses for the RVU LF device.
+ *
+ * @param dev_id
+ *   device id of RVU LF device
+ * @param bar_num
+ *   BAR number for which address is required
+ * @param[out] va
+ *    Virtual address of the BAR. 0 if not mapped
+ * @param[out] mask
+ *    BAR address mask, 0 if not mapped
+ *
+ * @return
+ *   Returns 0 on success, negative error code otherwise
+ */
+__rte_internal
+int rte_pmd_rvu_lf_bar_get(uint8_t dev_id, uint8_t bar_num, size_t *va, size_t *mask);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/drivers/raw/cnxk_rvu_lf/version.map b/drivers/raw/cnxk_rvu_lf/version.map
index aa974f629e..012f05d1e4 100644
--- a/drivers/raw/cnxk_rvu_lf/version.map
+++ b/drivers/raw/cnxk_rvu_lf/version.map
@@ -1,6 +1,7 @@
 INTERNAL {
 	global:
 
+	rte_pmd_rvu_lf_bar_get;
 	rte_pmd_rvu_lf_irq_register;
 	rte_pmd_rvu_lf_irq_unregister;
 	rte_pmd_rvu_lf_msg_handler_register;
-- 
2.25.1