[dpdk-dev] [PATCH v9] 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>

---
v5
* add error check for memzone lookup
v6
* fix compilation
v7
* include dev ops for secondary
v8
* fix wrong memzone alloaction
v9
* fix comments
---
 drivers/raw/ioat/ioat_common.c | 15 +++++++++++++++
 drivers/raw/ioat/ioat_rawdev.c | 15 +++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/drivers/raw/ioat/ioat_common.c b/drivers/raw/ioat/ioat_common.c
index 142e171bc9..d055c36a2a 100644
--- a/drivers/raw/ioat/ioat_common.c
+++ b/drivers/raw/ioat/ioat_common.c
@@ -215,7 +215,22 @@ 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);
+	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;
+		rawdev->dev_ops = ops;
+		rawdev->device = dev;
+		return 0;
+	}
 	mz = rte_memzone_reserve(mz_name, sizeof(struct idxd_rawdev),
 			dev->numa_node, RTE_MEMZONE_IOVA_CONTIG);
 	if (mz == NULL) {
diff --git a/drivers/raw/ioat/ioat_rawdev.c b/drivers/raw/ioat/ioat_rawdev.c
index 2c88b4369f..77216f67f5 100644
--- a/drivers/raw/ioat/ioat_rawdev.c
+++ b/drivers/raw/ioat/ioat_rawdev.c
@@ -165,7 +165,22 @@ 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);
+	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;
+		rawdev->dev_ops = &ioat_rawdev_ops;
+		rawdev->device = &dev->device;
+		return 0;
+	}
 	mz = rte_memzone_reserve(mz_name, sizeof(struct rte_ioat_rawdev),
 			dev->device.numa_node, RTE_MEMZONE_IOVA_CONTIG);
 	if (mz == NULL) {
-- 
2.25.1