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add PREVIOUS index macro for transmit side

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This commit is contained in:
Matt Jacob 2000-01-23 03:18:14 +00:00
parent 127432d7e2
commit 1c3c868623
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=56421
1 changed files with 1 additions and 0 deletions
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sys/pci/if_wxvar.h
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@ -313,6 +313,7 @@ typedef struct wx_softc {
*/
#define WX_MAX_TDESC 256 /* number of transmit descriptors */
#define T_NXT_IDX(x) ((x + 1) & (WX_MAX_TDESC - 1))
#define T_PREV_IDX(x) ((x - 1) & (WX_MAX_TDESC - 1))
#define WX_MAX_RDESC 64 /* number of receive descriptors */
#ifdef PADDED_CELL
#define RXINCR 2