From: Leonid Ravich <[email protected]> DMA transaction time to complition is a function of PCI bandwidth,transaction size and a queue depth. So hard coded value for timeouts might be wrong for some scenarios.
Signed-off-by: Leonid Ravich <[email protected]> --- drivers/dma/ioat/dma.c | 12 ++++++++++++ drivers/dma/ioat/dma.h | 2 -- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 8ad0ad861c86..7621b5be5cf4 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -26,6 +26,18 @@ #include "../dmaengine.h" +int complition_timeout = 200; +module_param(complition_timeout, int, 0644); +MODULE_PARM_DESC(complition_timeout, + "set ioat complition timeout [msec] (default 200 [msec])"); +int idle_timeout = 2000; +module_param(idle_timeout, int, 0644); +MODULE_PARM_DESC(idle_timeout, + "set ioat idel timeout [msec] (default 2000 [msec])"); + +#define IDLE_TIMEOUT msecs_to_jiffies(idle_timeout) +#define COMPLETION_TIMEOUT msecs_to_jiffies(complition_timeout) + static char *chanerr_str[] = { "DMA Transfer Source Address Error", "DMA Transfer Destination Address Error", diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h index e6b622e1ba92..f7f31fdf14cf 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -104,8 +104,6 @@ struct ioatdma_chan { #define IOAT_RUN 5 #define IOAT_CHAN_ACTIVE 6 struct timer_list timer; - #define COMPLETION_TIMEOUT msecs_to_jiffies(100) - #define IDLE_TIMEOUT msecs_to_jiffies(2000) #define RESET_DELAY msecs_to_jiffies(100) struct ioatdma_device *ioat_dma; dma_addr_t completion_dma; -- 2.16.2
