linux-kernel - [PATCH net-next v5 04/10] dmaengine: xilinx_dma: Increase AXI DMA transaction segment count

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Message-ID: <1691387509-2113129-5-git-send-email-radhey.shyam.pandey@amd.com>
Date:   Mon, 7 Aug 2023 11:21:43 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@....com>
To:     <vkoul@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <michal.simek@....com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <linux@...linux.org.uk>
CC:     <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <git@....com>, Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Subject: [PATCH net-next v5 04/10] dmaengine: xilinx_dma: Increase AXI DMA transaction segment count

Increase AXI DMA transaction segments count to ensure that even in
high load we always get a free segment in prepare descriptor for a
DMA_SLAVE transaction.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
---
Changes for v5:
- New patch in this series. Just a note that dmaengine series
  was earlier sent as separate series[1] and now it's merged
  with axiethernet series[2].
  [1]: https://lore.kernel.org/all/20221124102745.2620370-1-sarath.babu.naidu.gaddam@amd.com
  [2]: https://lore.kernel.org/all/20230630053844.1366171-1-sarath.babu.naidu.gaddam@amd.com
- Switch to amd.com email address.
---
 drivers/dma/xilinx/xilinx_dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index d526e472b905..7f3c57fbe1e3 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -178,7 +178,7 @@
 #define XILINX_DMA_BD_SOP		BIT(27)
 #define XILINX_DMA_BD_EOP		BIT(26)
 #define XILINX_DMA_COALESCE_MAX		255
-#define XILINX_DMA_NUM_DESCS		255
+#define XILINX_DMA_NUM_DESCS		512
 #define XILINX_DMA_NUM_APP_WORDS	5
 
 /* AXI CDMA Specific Registers/Offsets */
-- 
2.34.1