Hi Vinod,
Thanks your comments.
Please see my comments inline.
Best Regards,
Peng
>-----Original Message-----
>From: Vinod Koul <vkoul@xxxxxxxxxx>
>Sent: 2019年4月26日 19:51
>To: Peng Ma <peng.ma@xxxxxxx>
>Cc: dan.j.williams@xxxxxxxxx; Leo Li <leoyang.li@xxxxxxx>;
>dmaengine@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
>Subject: [EXT] Re: [PATCH] dmaengine: fsl-qdma: fixed the source/destination
>descriptior format
>
>Caution: EXT Email
>
>On 19-04-19, 08:46, Peng Ma wrote:
>> CMD of Source/Destination descriptior format should be lower of
>
>s/descriptior/descriptor
>
[Peng Ma] Got it.
>> struct fsl_qdma_engine number data address.
>>
>> Signed-off-by: Peng Ma <peng.ma@xxxxxxx>
>> ---
>> 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;
>> - }
>
>this seems unrelated can you explain?
>
[Peng Ma] This is an added improvement. When an error occurs we should clean the error reg then to return.
I forgot to explain it on comments. Should I add this changed to the comments?
>>
>> qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status +
>FSL_QDMA_DEDR);
>> return IRQ_HANDLED;
>> --
>> 1.7.1
>
>--
>~Vinod
