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Set DMA alignment constraint of status, TX and RX LEs(List Elements

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in Marvell terms) to 32768.  32768 looks overkill but it will
ensure correct DMAed update.  This change addresses occasional
watchdog timeouts reported on 10.2-RELEASE.

Tested by:	Johann Hugo <jhugo@meraka.csir.co.za>
MFC after:	2 weeks
This commit is contained in:
Pyun YongHyeon 2015-08-28 01:32:42 +00:00
parent b81cd10773
commit 97c477f86f
1 changed files with 2 additions and 7 deletions
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9
sys/dev/msk/if_mskreg.h
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@ -2175,13 +2175,8 @@
#define MSK_ADDR_LO(x) ((uint64_t) (x) & 0xffffffffUL)
#define MSK_ADDR_HI(x) ((uint64_t) (x) >> 32)
/*
* At first I guessed 8 bytes, the size of a single descriptor, would be
* required alignment constraints. But, it seems that Yukon II have 4096
* bytes boundary alignment constraints.
*/
#define MSK_RING_ALIGN 4096
#define MSK_STAT_ALIGN 4096
#define MSK_RING_ALIGN 32768
#define MSK_STAT_ALIGN 32768
/* Rx descriptor data structure */
struct msk_rx_desc {