linux-kernel - [PATCH] dmaengine: fsl-qdma: fixed the source/destination descriptior format

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Date:   Fri, 19 Apr 2019 08:46:29 +0000
From:   Peng Ma <peng.ma@....com>
To:     dan.j.williams@...el.com, vkoul@...nel.org
Cc:     leoyang.li@....com, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peng Ma <peng.ma@....com>
Subject: [PATCH] dmaengine: fsl-qdma: fixed the source/destination descriptior format

CMD of Source/Destination descriptior format should be lower of
struct fsl_qdma_engine number data address.

Signed-off-by: Peng Ma <peng.ma@....com>
---
 drivers/dma/fsl-qdma.c |   29 ++++++++++++++++++-----------
 1 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c
index aa1d0ae..542765a 100644
--- a/drivers/dma/fsl-qdma.c
+++ b/drivers/dma/fsl-qdma.c
@@ -113,6 +113,7 @@
 /* Field definition for Descriptor offset */
 #define QDMA_CCDF_STATUS		20
 #define QDMA_CCDF_OFFSET		20
+#define QDMA_SDDF_CMD(x)		(((u64)(x)) << 32)
 
 /* Field definition for safe loop count*/
 #define FSL_QDMA_HALT_COUNT		1500
@@ -214,6 +215,12 @@ struct fsl_qdma_engine {
 
 };
 
+static inline void
+qdma_sddf_set_cmd(struct fsl_qdma_format *sddf, u32 val)
+{
+	sddf->data = QDMA_SDDF_CMD(val);
+}
+
 static inline u64
 qdma_ccdf_addr_get64(const struct fsl_qdma_format *ccdf)
 {
@@ -341,6 +348,7 @@ static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
 static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
 				      dma_addr_t dst, dma_addr_t src, u32 len)
 {
+	u32 cmd;
 	struct fsl_qdma_format *sdf, *ddf;
 	struct fsl_qdma_format *ccdf, *csgf_desc, *csgf_src, *csgf_dest;
 
@@ -353,6 +361,7 @@ static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
 
 	memset(fsl_comp->virt_addr, 0, FSL_QDMA_COMMAND_BUFFER_SIZE);
 	memset(fsl_comp->desc_virt_addr, 0, FSL_QDMA_DESCRIPTOR_BUFFER_SIZE);
+
 	/* Head Command Descriptor(Frame Descriptor) */
 	qdma_desc_addr_set64(ccdf, fsl_comp->bus_addr + 16);
 	qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
@@ -369,14 +378,14 @@ static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
 	/* This entry is the last entry. */
 	qdma_csgf_set_f(csgf_dest, len);
 	/* Descriptor Buffer */
-	sdf->data =
-		cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
-			    FSL_QDMA_CMD_RWTTYPE_OFFSET);
-	ddf->data =
-		cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
-			    FSL_QDMA_CMD_RWTTYPE_OFFSET);
-	ddf->data |=
-		cpu_to_le64(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
+	cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
+			  FSL_QDMA_CMD_RWTTYPE_OFFSET);
+	qdma_sddf_set_cmd(sdf, cmd);
+
+	cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
+			  FSL_QDMA_CMD_RWTTYPE_OFFSET);
+	cmd |= cpu_to_le32(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
+	qdma_sddf_set_cmd(ddf, cmd);
 }
 
 /*
@@ -701,10 +710,8 @@ static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
 
 	intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
 
-	if (intr) {
+	if (intr)
 		dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
-		return IRQ_NONE;
-	}
 
 	qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
 	return IRQ_HANDLED;
-- 
1.7.1