diff options
| author | Leonid Ravich <Leonid.Ravich@emc.com> | 2020-07-01 21:48:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-29 10:18:37 +0200 |
| commit | 460c0dafea9289e0618778051989117175e65630 (patch) | |
| tree | 2bc6de73bbaae2e606bf9fac1a03acd363c9c768 | |
| parent | 493aed3263ca2cf6cabdcca0e63c341b5d225553 (diff) | |
| download | linux-stable-460c0dafea9289e0618778051989117175e65630.tar.gz linux-stable-460c0dafea9289e0618778051989117175e65630.tar.bz2 linux-stable-460c0dafea9289e0618778051989117175e65630.zip | |
dmaengine: ioat setting ioat timeout as module parameter
[ Upstream commit 87730ccbddcb48478b1b88e88b14e73424130764 ]
DMA transaction time to completion 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 <Leonid.Ravich@emc.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20200701184816.29138-1-leonid.ravich@dell.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/dma/ioat/dma.c | 12 | ||||
| -rw-r--r-- | 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 18c011e57592..8e2a4d1f0be5 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -26,6 +26,18 @@ #include "../dmaengine.h" +int completion_timeout = 200; +module_param(completion_timeout, int, 0644); +MODULE_PARM_DESC(completion_timeout, + "set ioat completion 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(completion_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 b8e8e0b9693c..4ac9134962f3 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -99,8 +99,6 @@ 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; |