linux-kernel - [PATCH 3/3] dmaengine: xilinx: xdma: Clarify kdoc in XDMA driver

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Date: Wed, 27 Mar 2024 10:58:50 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Lizhi Hou <lizhi.hou@....com>, Brian Xu <brian.xu@....com>, 
 Raj Kumar Rampelli <raj.kumar.rampelli@....com>, 
 Vinod Koul <vkoul@...nel.org>, Michal Simek <michal.simek@....com>, 
 Jan Kuliga <jankul@...tek.krakow.pl>, 
 Miquel Raynal <miquel.raynal@...tlin.com>
Cc: dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, stable@...r.kernel.org, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH 3/3] dmaengine: xilinx: xdma: Clarify kdoc in XDMA driver

From: Miquel Raynal <miquel.raynal@...tlin.com>

Clarify the kernel doc of xdma_fill_descs(), especially how big chunks
will be handled.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/dma/xilinx/xdma.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/xilinx/xdma.c b/drivers/dma/xilinx/xdma.c
index 5a3a3293b21b..313b217388fe 100644
--- a/drivers/dma/xilinx/xdma.c
+++ b/drivers/dma/xilinx/xdma.c
@@ -554,12 +554,14 @@ static void xdma_synchronize(struct dma_chan *chan)
 }
 
 /**
- * xdma_fill_descs - Fill hardware descriptors with contiguous memory block addresses
- * @sw_desc: tx descriptor state container
- * @src_addr: Value for a ->src_addr field of a first descriptor
- * @dst_addr: Value for a ->dst_addr field of a first descriptor
- * @size: Total size of a contiguous memory block
- * @filled_descs_num: Number of filled hardware descriptors for corresponding sw_desc
+ * xdma_fill_descs() - Fill hardware descriptors for one contiguous memory chunk.
+ *		       More than one descriptor will be used if the size is bigger
+ *		       than XDMA_DESC_BLEN_MAX.
+ * @sw_desc: Descriptor container
+ * @src_addr: First value for the ->src_addr field
+ * @dst_addr: First value for the ->dst_addr field
+ * @size: Size of the contiguous memory block
+ * @filled_descs_num: Index of the first descriptor to take care of in @sw_desc
  */
 static inline u32 xdma_fill_descs(struct xdma_desc *sw_desc, u64 src_addr,
 				  u64 dst_addr, u32 size, u32 filled_descs_num)

-- 
2.43.0