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PERFORCE change 109803 for review

Subject: PERFORCE change 109803 for review
From: Sam Leffler
Date: Sun, 12 Nov 2006 16:48:27 GMT
http://perforce.freebsd.org/chv.cgi?CH=109803

Change 109803 by sam@sam_ebb on 2006/11/12 16:47:56

        update comments

Affected files ...

.. //depot/projects/arm/src/sys/arm/xscale/ixp425/if_npereg.h#7 edit

Differences ...

==== //depot/projects/arm/src/sys/arm/xscale/ixp425/if_npereg.h#7 (text+ko) ====

@@ -61,15 +61,15 @@
 #define        ARM_XSCALE_IF_NPEREG_H
 
 /*
- * NPE/NPE tx/rx descriptor format.  This data structure has an
- * area used by the driver followed by an area shared with ucode
- * running in the NPE.  The latter must be cacheline-aligned;
- * hence the unused space in the s/w area.  We allocate NPE_MAXSEG
- * "descriptors" per buffer; this allows us to do minimal s/g.
- * The number of descriptors can be expanded but doing so uses
- * memory so should be done with care.
+ * NPE/NPE tx/rx descriptor format.  This is just the area
+ * shared with ucode running in the NPE; the driver-specific
+ * state is defined in the driver.  The shared area must be
+ * cacheline-aligned.  We allocate NPE_MAXSEG "descriptors"
+ * per buffer; this allows us to do minimal s/g.  The number
+ * of descriptors can be expanded but doing so uses memory
+ * so should be done with care.
  *
- * These buffers are setup in uncached memory.
+ * The driver sets up buffers in uncached memory.
  */
 #define        NPE_MAXSEG      3               /* empirically selected */
 
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