Skip to contentSkip to conversation

dmaengine: idma64: Update bytes_transferred field

PATCH Applied [email protected] 2 participants 2 messages Feb 3, 2023 – Feb 10, 2023

Subsystems (2)
dmaengine Intel LPSS (Low Power SubSystem) drivers
lore
Share & tools
lore

[email protected]

author
#0 lore raw

PATCH 1/1 dmaengine: idma64: Update bytes_transferred field

From: Aman Kumar <[email protected]>

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 <[email protected]>
Signed-off-by Srikanth Thokala <[email protected]>
Signed-off-by Aman Kumar <[email protected]>
Reviewed-by Andy Shevchenko <[email protected]>
---
 drivers/dma/idma64.c | 4 ++++
 1 file changed, 4 insertions(+)
drivers/dma/idma64.c +4 -0
index c33087c5cd02..8880d2b91bf5 100644
@@ -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);
 		}
Signature · 1 line
2.17.1
maintainer Applied
#1 lore raw
Quoted 9 lines · On 03-02-23, 17:47, [email protected] wrote:

From: Aman Kumar <[email protected]>

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.

Applied, thanks

Signature · 1 line
~Vinod