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- From: Felix Fietkau <nbd@openwrt.org>
- Date: Sun, 12 Apr 2015 22:36:16 +0200
- Subject: [PATCH] bgmac: increase rx ring size from 511 to 512
- Limiting it to 511 looks like a failed attempt at leaving one descriptor
- empty to allow the hardware to stop processing a buffer that has not
- been prepared yet. However, this doesn't work because this affects the
- total ring size as well
- Signed-off-by: Felix Fietkau <nbd@openwrt.org>
- ---
- --- a/drivers/net/ethernet/broadcom/bgmac.h
- +++ b/drivers/net/ethernet/broadcom/bgmac.h
- @@ -356,7 +356,7 @@
- #define BGMAC_MAX_RX_RINGS 1
-
- #define BGMAC_TX_RING_SLOTS 128
- -#define BGMAC_RX_RING_SLOTS 512 - 1 /* Why -1? Well, Broadcom does that... */
- +#define BGMAC_RX_RING_SLOTS 512
-
- #define BGMAC_RX_HEADER_LEN 28 /* Last 24 bytes are unused. Well... */
- #define BGMAC_RX_FRAME_OFFSET 30 /* There are 2 unused bytes between header and real data */
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