Messages in this thread Patch in this message | | | From | aman.kumar@intel ... | Subject | [PATCH v1 1/1] dmaengine: idma64: Update bytes_transferred field | Date | Fri, 3 Feb 2023 17:47:02 +0530 |
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From: Aman Kumar <aman.kumar@intel.com>
Currently when 8250 data transfer is done, bytes_tranferred always returns 0 at /sys/devices/pci0000\:\:**.*/dma/dma*chan*/bytes_transferred. In many cases it gives false impression that data is not being trasferred via DMA.
So, updating the bytes_transferred field to count the bytes whenever there is data transfer using idma64.
Co-developed-by: Srikanth Thokala <srikanth.thokala@intel.com> Signed-off-by: Srikanth Thokala <srikanth.thokala@intel.com> Signed-off-by: Aman Kumar <aman.kumar@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/dma/idma64.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c index c33087c5cd02..8880d2b91bf5 100644 --- a/drivers/dma/idma64.c +++ b/drivers/dma/idma64.c @@ -137,8 +137,11 @@ static void idma64_chan_irq(struct idma64 *idma64, unsigned short c, u32 status_err, u32 status_xfer) { struct idma64_chan *idma64c = &idma64->chan[c]; + struct dma_chan_percpu *stat; struct idma64_desc *desc; + stat = this_cpu_ptr(idma64c->vchan.chan.local); + spin_lock(&idma64c->vchan.lock); desc = idma64c->desc; if (desc) { @@ -149,6 +152,7 @@ static void idma64_chan_irq(struct idma64 *idma64, unsigned short c, dma_writel(idma64, CLEAR(XFER), idma64c->mask); desc->status = DMA_COMPLETE; vchan_cookie_complete(&desc->vdesc); + stat->bytes_transferred += desc->length; idma64_start_transfer(idma64c); } -- 2.17.1
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