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From: Amit Prakash Shukla <amitprakashs@marvell.com>
To: Chengwen Feng <fengchengwen@huawei.com>, Kevin Laatz
<kevin.laatz@intel.com>, Bruce Richardson <bruce.richardson@intel.com>
CC: <dev@dpdk.org>, <jerinj@marvell.com>, <vattunuru@marvell.com>,
<ndabilpuram@marvell.com>, <anoobj@marvell.com>,
<mb@smartsharesystems.com>, Amit Prakash Shukla <amitprakashs@marvell.com>
Subject: [PATCH v2] lib/dmadev: get DMA device using device ID
Date: Tue, 19 Dec 2023 16:30:27 +0530
Message-ID: <20231219110027.16443-1-amitprakashs@marvell.com>
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DMA library has a function to get DMA device based on device name but
there is no function to get DMA device using device id.
Added a function that lookup for the dma device using device id and
returns the pointer to the same.
Signed-off-by: Amit Prakash Shukla <amitprakashs@marvell.com>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>
---
v2:
- Arranged api in alphabetical order in version.map
lib/dmadev/rte_dmadev.c | 9 +++++++++
lib/dmadev/rte_dmadev_pmd.h | 14 ++++++++++++++
lib/dmadev/version.map | 1 +
3 files changed, 24 insertions(+)
diff --git a/lib/dmadev/rte_dmadev.c b/lib/dmadev/rte_dmadev.c
index 4e5e420c82..83f49e77f2 100644
--- a/lib/dmadev/rte_dmadev.c
+++ b/lib/dmadev/rte_dmadev.c
@@ -397,6 +397,15 @@ rte_dma_is_valid(int16_t dev_id)
rte_dma_devices[dev_id].state != RTE_DMA_DEV_UNUSED;
}
+struct rte_dma_dev *
+rte_dma_pmd_get_dev_by_id(const int dev_id)
+{
+ if (!rte_dma_is_valid(dev_id))
+ return NULL;
+
+ return &rte_dma_devices[dev_id];
+}
+
uint16_t
rte_dma_count_avail(void)
{
diff --git a/lib/dmadev/rte_dmadev_pmd.h b/lib/dmadev/rte_dmadev_pmd.h
index c61cedfb23..f68c3ac6aa 100644
--- a/lib/dmadev/rte_dmadev_pmd.h
+++ b/lib/dmadev/rte_dmadev_pmd.h
@@ -167,6 +167,20 @@ struct rte_dma_dev *rte_dma_pmd_allocate(const char *name, int numa_node,
__rte_internal
int rte_dma_pmd_release(const char *name);
+/**
+ * @internal
+ * Get the rte_dma_dev structure device pointer for the device id.
+ *
+ * @param dev_id
+ * Device ID value to select the device structure.
+ *
+ * @return
+ * - rte_dma_dev structure pointer for the given device ID on success, NULL
+ * otherwise.
+ */
+__rte_internal
+struct rte_dma_dev *rte_dma_pmd_get_dev_by_id(const int dev_id);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/dmadev/version.map b/lib/dmadev/version.map
index 2a3736514c..046dbfa988 100644
--- a/lib/dmadev/version.map
+++ b/lib/dmadev/version.map
@@ -25,6 +25,7 @@ INTERNAL {
rte_dma_fp_objs;
rte_dma_pmd_allocate;
+ rte_dma_pmd_get_dev_by_id;
rte_dma_pmd_release;
local: *;
--
2.17.1