[dpdk-dev] [PATCH v3] raw/ioat: add secondary process support

[Kumar Amber]

Add support for secondary processes in ioat devices. The update
allocates a memzone for a primary process or returns it in a
secondary process.

Signed-off-by: Kumar Amber <kumar.amber at intel.com>
---
 drivers/raw/ioat/ioat_common.c | 17 ++++++++++++++---
 drivers/raw/ioat/ioat_rawdev.c | 18 ++++++++++++++----
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/drivers/raw/ioat/ioat_common.c b/drivers/raw/ioat/ioat_common.c
index 142e171bc9..baa0e856f6 100644
--- a/drivers/raw/ioat/ioat_common.c
+++ b/drivers/raw/ioat/ioat_common.c
@@ -215,11 +215,22 @@ idxd_rawdev_create(const char *name, struct rte_device *dev,
 		goto cleanup;
 	}
 
+	/* allocate memory for primary process
+	 * else return memory of primary
+	 * memzone for secondary process
+	 */
 	snprintf(mz_name, sizeof(mz_name), "rawdev%u_private", rawdev->dev_id);
-	mz = rte_memzone_reserve(mz_name, sizeof(struct idxd_rawdev),
-			dev->numa_node, RTE_MEMZONE_IOVA_CONTIG);
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+		mz = rte_memzone_lookup(mz_name);
+		rawdev->dev_private = mz->addr;
+		return 0;
+	}
+	mz = rte_memzone_reserve(mz_name,
+			sizeof(struct rte_ioat_rawdev),
+			dev->numa_node,
+			RTE_MEMZONE_IOVA_CONTIG);
 	if (mz == NULL) {
-		IOAT_PMD_ERR("Unable to reserve memzone for private data\n");
+		IOAT_PMD_ERR("Unable to reserve memzone\n");
 		ret = -ENOMEM;
 		goto cleanup;
 	}
diff --git a/drivers/raw/ioat/ioat_rawdev.c b/drivers/raw/ioat/ioat_rawdev.c
index 2c88b4369f..76ed48d5a0 100644
--- a/drivers/raw/ioat/ioat_rawdev.c
+++ b/drivers/raw/ioat/ioat_rawdev.c
@@ -165,15 +165,25 @@ ioat_rawdev_create(const char *name, struct rte_pci_device *dev)
 		goto cleanup;
 	}
 
+	/* allocate memory for primary process
+	 * else return memory of primary
+	 * memzone for secondary process
+	 */
 	snprintf(mz_name, sizeof(mz_name), "rawdev%u_private", rawdev->dev_id);
-	mz = rte_memzone_reserve(mz_name, sizeof(struct rte_ioat_rawdev),
-			dev->device.numa_node, RTE_MEMZONE_IOVA_CONTIG);
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+		mz = rte_memzone_lookup(mz_name);
+		rawdev->dev_private = mz->addr;
+		return 0;
+	}
+	mz = rte_memzone_reserve(mz_name,
+			sizeof(struct rte_ioat_rawdev),
+			dev->device.numa_node,
+			RTE_MEMZONE_IOVA_CONTIG);
 	if (mz == NULL) {
-		IOAT_PMD_ERR("Unable to reserve memzone for private data\n");
+		IOAT_PMD_ERR("Unable to reserve memzone\n");
 		ret = -ENOMEM;
 		goto cleanup;
 	}
-
 	rawdev->dev_private = mz->addr;
 	rawdev->dev_ops = &ioat_rawdev_ops;
 	rawdev->device = &dev->device;
-- 
2.25.1