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Staging: et131x: rxstat is not used

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Turn it into a u32 and document the fields in a comment instead

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2009-10-06 15:48:02 +01:00 committed by Greg Kroah-Hartman
parent 5f1377d42b
commit 10643efffa
1 changed files with 13 additions and 23 deletions
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36
drivers/staging/et131x/et1310_rx.h
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@ -209,36 +209,26 @@ typedef struct _PKT_STAT_DESC_t {
/* Typedefs for the RX DMA status word */
/*
* RXSTAT_WORD0_t structure holds part of the status bits of the Rx DMA engine
* rx status word 0 holds part of the status bits of the Rx DMA engine
* that get copied out to memory by the ET-1310. Word 0 is a 32 bit word
* whichcontains Free Buffer ring 0 and 1 available offset.
* which contains the Free Buffer ring 0 and 1 available offset.
*
* bit 0-9 FBR1 offset
* bit 10 Wrap flag for FBR1
* bit 16-25 FBR0 offset
* bit 26 Wrap flag for FBR0
*/
typedef union _rxstat_word0_t {
u32 value;
struct {
#ifdef _BIT_FIELDS_HTOL
u32 FBR1unused:5; /* bits 27-31 */
u32 FBR1wrap:1; /* bit 26 */
u32 FBR1offset:10; /* bits 16-25 */
u32 FBR0unused:5; /* bits 11-15 */
u32 FBR0wrap:1; /* bit 10 */
u32 FBR0offset:10; /* bits 0-9 */
#else
u32 FBR0offset:10; /* bits 0-9 */
u32 FBR0wrap:1; /* bit 10 */
u32 FBR0unused:5; /* bits 11-15 */
u32 FBR1offset:10; /* bits 16-25 */
u32 FBR1wrap:1; /* bit 26 */
u32 FBR1unused:5; /* bits 27-31 */
#endif
} bits;
} RXSTAT_WORD0_t, *PRXSTAT_WORD0_t;
/*
* RXSTAT_WORD1_t structure holds part of the status bits of the Rx DMA engine
* that get copied out to memory by the ET-1310. Word 3 is a 32 bit word
* which contains the Packet Status Ring available offset.
*/
#define RXSTAT1_OFFSET 16
#define RXSTAT1_MASK 0xFFF
#define RXSTAT1_WRAP 0x10000000
typedef union _rxstat_word1_t {
u32 value;
struct {
@ -261,7 +251,7 @@ typedef union _rxstat_word1_t {
* it sits in free memory, and is pointed to by 0x101c / 0x1020
*/
typedef struct _rx_status_block_t {
RXSTAT_WORD0_t Word0;
u32 Word0;
RXSTAT_WORD1_t Word1;
} RX_STATUS_BLOCK_t, *PRX_STATUS_BLOCK_t;