[PATCH 1/4] dmadev: add function to get list of device identifiers

[Gowrishankar Muthukrishnan]

Add a function to get list of device identifiers for a given driver
name.

Signed-off-by: Gowrishankar Muthukrishnan <gmuthukrishn at marvell.com>
---
 lib/dmadev/rte_dmadev.c | 20 ++++++++++++++++++++
 lib/dmadev/rte_dmadev.h | 21 +++++++++++++++++++++
 lib/dmadev/version.map  |  1 +
 3 files changed, 42 insertions(+)

diff --git a/lib/dmadev/rte_dmadev.c b/lib/dmadev/rte_dmadev.c
index 8c095e1f35..f2a106564d 100644
--- a/lib/dmadev/rte_dmadev.c
+++ b/lib/dmadev/rte_dmadev.c
@@ -388,6 +388,26 @@ rte_dma_get_dev_id_by_name(const char *name)
 	return dev->data->dev_id;
 }
 
+uint8_t
+rte_dma_get_dev_list_by_driver(const char *name, int16_t *devs, uint8_t nb_devs)
+{
+	uint8_t i, count = 0;
+
+	if (name == NULL)
+		return count;
+
+	for (i = 0; i < dma_devices_max && count < nb_devs; i++) {
+		if (rte_dma_devices[i].state == RTE_DMA_DEV_UNUSED)
+			continue;
+
+		if (strncmp(rte_dma_devices[i].device->driver->name,
+					name, strlen(name) + 1) == 0)
+			devs[count++] = i;
+	}
+
+	return count;
+}
+
 bool
 rte_dma_is_valid(int16_t dev_id)
 {
diff --git a/lib/dmadev/rte_dmadev.h b/lib/dmadev/rte_dmadev.h
index e61d71959e..689062a686 100644
--- a/lib/dmadev/rte_dmadev.h
+++ b/lib/dmadev/rte_dmadev.h
@@ -191,6 +191,27 @@ int rte_dma_dev_max(size_t dev_max);
 __rte_experimental
 int rte_dma_get_dev_id_by_name(const char *name);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Get the list of device identifiers for the DMA driver.
+ *
+ * @param name
+ *   DMA driver name.
+ * @param devs
+ *   Output devices identifiers.
+ * @param nb_devs
+ *   Maximal number of devices.
+ *
+ * @return
+ *   Returns number of device identifiers.
+ */
+__rte_experimental
+uint8_t rte_dma_get_dev_list_by_driver(const char *name,
+				       int16_t *devs,
+				       uint8_t nb_devs);
+
 /**
  * @warning
  * @b EXPERIMENTAL: this API may change without prior notice.
diff --git a/lib/dmadev/version.map b/lib/dmadev/version.map
index 7031d6b335..b4d56b41a0 100644
--- a/lib/dmadev/version.map
+++ b/lib/dmadev/version.map
@@ -7,6 +7,7 @@ EXPERIMENTAL {
 	rte_dma_dev_max;
 	rte_dma_dump;
 	rte_dma_get_dev_id_by_name;
+	rte_dma_get_dev_list_by_driver;
 	rte_dma_info_get;
 	rte_dma_is_valid;
 	rte_dma_next_dev;
-- 
2.25.1