Author: adrian
Date: Sat May 14 23:45:16 2016
New Revision: 299797
URL: https://svnweb.freebsd.org/changeset/base/299797
Log:
[bwn] disable writing slottime timing out to improve performance.
this is from b43 linux, there's a comment in there which notes
one nic family suffers performance degredation with this being set.
Modified:
head/sys/dev/bwn/if_bwn.c
Modified: head/sys/dev/bwn/if_bwn.c
==============================================================================
--- head/sys/dev/bwn/if_bwn.c Sat May 14 23:44:30 2016 (r299796)
+++ head/sys/dev/bwn/if_bwn.c Sat May 14 23:45:16 2016 (r299797)
@@ -6381,10 +6381,15 @@ static void
bwn_set_slot_time(struct bwn_mac *mac, uint16_t time)
{
+ /* XXX should exit if 5GHz band .. */
if (mac->mac_phy.type != BWN_PHYTYPE_G)
return;
+
BWN_WRITE_2(mac, 0x684, 510 + time);
+ /* Disabled in Linux b43, can adversely effect performance */
+#if 0
bwn_shm_write_2(mac, BWN_SHARED, 0x0010, time);
+#endif
}
static struct bwn_dma_ring *
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