[PATCH] raw/cnxk_bphy: support multi-process mode

[Tomasz Duszynski <tduszynski@marvell.com>]

Add support for sharing BPHY PMD across multiple running processes.
In scenarios where resources need to be shared across processes
user-space need to ensure serialization.

Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Reviewed-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
Tested-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
---
 doc/guides/rawdevs/cnxk_bphy.rst  |  8 ++++++++
 drivers/raw/cnxk_bphy/cnxk_bphy.c | 16 ++++++++++------
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/doc/guides/rawdevs/cnxk_bphy.rst b/doc/guides/rawdevs/cnxk_bphy.rst
index 2490912534..b544b543a3 100644
--- a/doc/guides/rawdevs/cnxk_bphy.rst
+++ b/doc/guides/rawdevs/cnxk_bphy.rst
@@ -19,6 +19,14 @@ The BPHY CGX/RPM implements following features in the rawdev API:
 - Access to BPHY CGX/RPM via a set of predefined messages
 - Access to BPHY memory
 - Custom interrupt handlers
+- Multiprocess aware
+
+Limitations
+-----------
+
+In multiprocess mode user-space application must ensure no resources
+sharing takes place. Otherwise, user-space application should ensure
+synchronization.
 
 Device Setup
 ------------
diff --git a/drivers/raw/cnxk_bphy/cnxk_bphy.c b/drivers/raw/cnxk_bphy/cnxk_bphy.c
index d42cca649c..15dbc4c1a6 100644
--- a/drivers/raw/cnxk_bphy/cnxk_bphy.c
+++ b/drivers/raw/cnxk_bphy/cnxk_bphy.c
@@ -359,10 +359,12 @@ bphy_rawdev_probe(struct rte_pci_driver *pci_drv,
 	bphy_dev->mem.res2 = pci_dev->mem_resource[2];
 	bphy_dev->bphy.pci_dev = pci_dev;
 
-	ret = roc_bphy_dev_init(&bphy_dev->bphy);
-	if (ret) {
-		rte_rawdev_pmd_release(bphy_rawdev);
-		return ret;
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		ret = roc_bphy_dev_init(&bphy_dev->bphy);
+		if (ret) {
+			rte_rawdev_pmd_release(bphy_rawdev);
+			return ret;
+		}
 	}
 
 	return 0;
@@ -390,8 +392,10 @@ bphy_rawdev_remove(struct rte_pci_device *pci_dev)
 		return -EINVAL;
 	}
 
-	bphy_dev = (struct bphy_device *)rawdev->dev_private;
-	roc_bphy_dev_fini(&bphy_dev->bphy);
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		bphy_dev = (struct bphy_device *)rawdev->dev_private;
+		roc_bphy_dev_fini(&bphy_dev->bphy);
+	}
 
 	return rte_rawdev_pmd_release(rawdev);
 }
-- 
2.34.1