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Date: Fri, 30 Oct 2015 07:16:06 -0700
Message-ID: <CAJ-VmonZuxq+nDp4j177DCww_6deYxQxSzki-JdntUBHdXwW=w@mail.gmail.com>
Subject: Re: arge1 on TL WDR3600
From: Adrian Chadd <adrian.chadd@gmail.com>
To: Eugene Grosbein <eugen@grosbein.net>
Cc: "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>
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Hiya,

Would you mind testing out this patch? I want to see if this makes any
difference. :-)

Thanks!

adrian@victoria:~/work/freebsd/head-embedded/src/sys/mips/atheros %
svn diff if_argevar.h
Index: if_argevar.h
===================================================================
--- if_argevar.h        (revision 290090)
+++ if_argevar.h        (working copy)
@@ -101,11 +101,16 @@
 #define ARGE_DESC_MORE         (1 << 24)
 #define ARGE_DESC_SIZE_MASK    ((1 << 12) - 1)
 #define        ARGE_DMASIZE(len)       ((len) & ARGE_DESC_SIZE_MASK)
+
+/*
+ * Pad each descriptor out to a cache line (32 bytes.)
+ */
 struct arge_desc {
        uint32_t        packet_addr;
        uint32_t        packet_ctrl;
        uint32_t        next_desc;
        uint32_t        padding;
+       uint32_t        padding2[4];
 };

 struct arge_txdesc {




-adrian