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comment requirement that rx/tx descriptor counts must be equal due to

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shared code...
define rx descriptor count in terms of tx
align defines

MFC after:	3 days
This commit is contained in:
John-Mark Gurney 2004-09-19 17:45:56 +00:00
parent 7143dfdc43
commit efefe913d2
1 changed files with 8 additions and 3 deletions
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7
sys/pci/if_rlreg.h
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@ -603,8 +603,13 @@ struct rl_stats {
uint16_t rl_rx_underruns;
};
#define RL_RX_DESC_CNT 64
/*
* Rx/Tx descriptor parameters (8139C+ and 8169 only)
*
* Tx/Rx count must be equal. Shared code like re_dma_map_desc assumes this.
*/
#define RL_TX_DESC_CNT 64
#define RL_RX_DESC_CNT RL_RX_DESC_CNT
#define RL_RX_LIST_SZ (RL_RX_DESC_CNT * sizeof(struct rl_desc))
#define RL_TX_LIST_SZ (RL_TX_DESC_CNT * sizeof(struct rl_desc))
#define RL_RING_ALIGN 256