[dpdk-dev] [PATCH v5] raw/ioat: add secondary process support

[Kumar Amber <kumar.amber@intel.com>]

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@intel.com>

---
v5
* add error check for memzone lookup
---
 drivers/raw/ioat/ioat_common.c | 21 +++++++++++++++++++--
 drivers/raw/ioat/ioat_rawdev.c | 19 +++++++++++++++++--
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/drivers/raw/ioat/ioat_common.c b/drivers/raw/ioat/ioat_common.c
index 142e171bc9..91f0d5122c 100644
--- a/drivers/raw/ioat/ioat_common.c
+++ b/drivers/raw/ioat/ioat_common.c
@@ -215,14 +215,31 @@ idxd_rawdev_create(const char *name, struct rte_device *dev,
 		goto cleanup;
 	}
 
+	/* Allocate memory for the primary process or else return the memory
+	 * of primary memzone for the 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);
+		if (mz == NULL) {
+			IOAT_PMD_ERR("Unable lookup memzone for private data\n");
+			ret = -ENOMEM;
+			goto cleanup;
+		}
+	}
+		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");
 		ret = -ENOMEM;
 		goto cleanup;
 	}
+
 	rawdev->dev_private = mz->addr;
 	rawdev->dev_ops = ops;
 	rawdev->device = dev;
diff --git a/drivers/raw/ioat/ioat_rawdev.c b/drivers/raw/ioat/ioat_rawdev.c
index 2c88b4369f..a9846e75f2 100644
--- a/drivers/raw/ioat/ioat_rawdev.c
+++ b/drivers/raw/ioat/ioat_rawdev.c
@@ -165,9 +165,24 @@ ioat_rawdev_create(const char *name, struct rte_pci_device *dev)
 		goto cleanup;
 	}
 
+	/* Allocate memory for the primary process or else return the memory
+	 * of primary memzone for the 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);
+		if (mz == NULL) {
+			IOAT_PMD_ERR("Unable lookup memzone for private data\n");
+			ret = -ENOMEM;
+			goto cleanup;
+		}
+		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");
 		ret = -ENOMEM;
-- 
2.25.1