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| author | Alexandre Bounine <alexandre.bounine@idt.com> | 2016-08-02 14:06:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 19:35:33 -0400 |
| commit | 4498c31adff99d243b34b0bf39363a35ea070928 (patch) | |
| tree | b3bedd78df56080a34ba8f607a0ad9dbdbb24c8e /drivers/rapidio/devices/tsi721.h | |
| parent | f8e3a68c05f0f09a0da947b9d447268d2d3f8780 (diff) | |
| download | linux-stable-4498c31adff99d243b34b0bf39363a35ea070928.tar.gz linux-stable-4498c31adff99d243b34b0bf39363a35ea070928.tar.bz2 linux-stable-4498c31adff99d243b34b0bf39363a35ea070928.zip | |
rapidio/tsi721_dma: add channel mask and queue size parameters
Add module parameters to allow load time configuration of DMA channels.
Depending on application, performance of DMA data transfers can benefit
from adjusted sizes of buffer descriptor ring and/or transaction
requests queue.
Having HW DMA channel selector mask allows to define which channels
(from seven available) are controlled by the mport device driver and
reserve some of them for direct use by other drivers.
Link: http://lkml.kernel.org/r/1469125134-16523-5-git-send-email-alexandre.bounine@idt.com
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Tested-by: Barry Wood <barry.wood@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio/devices/tsi721.h')
| -rw-r--r-- | drivers/rapidio/devices/tsi721.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h index 5456dbddc929..5941437cbdd1 100644 --- a/drivers/rapidio/devices/tsi721.h +++ b/drivers/rapidio/devices/tsi721.h @@ -661,7 +661,7 @@ enum dma_rtype { */ #define TSI721_DMA_CHNUM TSI721_DMA_MAXCH -#define TSI721_DMACH_MAINT 0 /* DMA channel for maint requests */ +#define TSI721_DMACH_MAINT 7 /* DMA channel for maint requests */ #define TSI721_DMACH_MAINT_NBD 32 /* Number of BDs for maint requests */ #define TSI721_DMACH_DMA 1 /* DMA channel for data transfers */ |