On Wednesday 17 August 2016 12:12 AM, Mark Brown wrote:
> On Tue, Aug 09, 2016 at 06:20:01PM +0530, Vignesh R wrote:
>>
>>
>
>> According to this thread[1], converting virtual address
>> pointer into scatterlist which is then DMA mapped is unsafe on systems
>> with certain cache architecture. He
On Tue, Aug 09, 2016 at 06:20:01PM +0530, Vignesh R wrote:
>
>
> According to this thread[1], converting virtual address
> pointer into scatterlist which is then DMA mapped is unsafe on systems
> with certain cache architecture. Hence, I added code to handle kmap
> buffers inside the driver rath
On Tuesday 09 August 2016 05:03 PM, Mark Brown wrote:
> On Tue, Aug 09, 2016 at 04:33:11PM +0530, Vignesh R wrote:
>
>> +static int ti_qspi_map_buf(struct ti_qspi *qspi, void *buf,
>> + unsigned int len, struct sg_table *sgt)
>> +{
>> +unsigned int max_seg_size =
>> +
On Tue, Aug 09, 2016 at 04:33:11PM +0530, Vignesh R wrote:
> +static int ti_qspi_map_buf(struct ti_qspi *qspi, void *buf,
> +unsigned int len, struct sg_table *sgt)
> +{
> + unsigned int max_seg_size =
> + dma_get_max_seg_size(qspi->rx_chan->device->dev);
>
Use mem-to-mem DMA to read from flash when reading in mmap mode. This
gives improved read performance and reduces CPU load.
With this patch the raw-read throughput is ~16MB/s on DRA74 EVM. And CPU
load is <20%. UBIFS read ~13 MB/s.
Signed-off-by: Vignesh R
---
v5: Move setting up DMA channel to
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