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Date: Tue, 29 Jan 2008 16:20:00 -0800
From: "Michael Chan" <mchan@...adcom.com>
To: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 5/7][BNX2]: Fine-tune flow control on 5709.
[BNX2]: Fine-tune flow control on 5709.
Make use of the programmable high/low water marks in 5709 for
802.3 flow control.
Signed-off-by: Michael Chan <mchan@...adcom.com>
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 8af63b4..e41c723 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -992,6 +992,42 @@ bnx2_copper_linkup(struct bnx2 *bp)
return 0;
}
+static void
+bnx2_init_rx_context0(struct bnx2 *bp)
+{
+ u32 val, rx_cid_addr = GET_CID_ADDR(RX_CID);
+
+ val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE;
+ val |= BNX2_L2CTX_CTX_TYPE_SIZE_L2;
+ val |= 0x02 << 8;
+
+ if (CHIP_NUM(bp) == CHIP_NUM_5709) {
+ u32 lo_water, hi_water;
+
+ if (bp->flow_ctrl & FLOW_CTRL_TX)
+ lo_water = BNX2_L2CTX_LO_WATER_MARK_DEFAULT;
+ else
+ lo_water = BNX2_L2CTX_LO_WATER_MARK_DIS;
+ if (lo_water >= bp->rx_ring_size)
+ lo_water = 0;
+
+ hi_water = bp->rx_ring_size / 4;
+
+ if (hi_water <= lo_water)
+ lo_water = 0;
+
+ hi_water /= BNX2_L2CTX_HI_WATER_MARK_SCALE;
+ lo_water /= BNX2_L2CTX_LO_WATER_MARK_SCALE;
+
+ if (hi_water > 0xf)
+ hi_water = 0xf;
+ else if (hi_water == 0)
+ lo_water = 0;
+ val |= lo_water | (hi_water << BNX2_L2CTX_HI_WATER_MARK_SHIFT);
+ }
+ bnx2_ctx_wr(bp, rx_cid_addr, BNX2_L2CTX_CTX_TYPE, val);
+}
+
static int
bnx2_set_mac_link(struct bnx2 *bp)
{
@@ -1056,6 +1092,9 @@ bnx2_set_mac_link(struct bnx2 *bp)
/* Acknowledge the interrupt. */
REG_WR(bp, BNX2_EMAC_STATUS, BNX2_EMAC_STATUS_LINK_CHANGE);
+ if (CHIP_NUM(bp) == CHIP_NUM_5709)
+ bnx2_init_rx_context0(bp);
+
return 0;
}
@@ -4616,6 +4655,13 @@ bnx2_init_rx_ring(struct bnx2 *bp)
bnx2_init_rxbd_rings(bp->rx_desc_ring, bp->rx_desc_mapping,
bp->rx_buf_use_size, bp->rx_max_ring);
+ bnx2_init_rx_context0(bp);
+
+ if (CHIP_NUM(bp) == CHIP_NUM_5709) {
+ val = REG_RD(bp, BNX2_MQ_MAP_L2_5);
+ REG_WR(bp, BNX2_MQ_MAP_L2_5, val | BNX2_MQ_MAP_L2_5_ARM);
+ }
+
bnx2_ctx_wr(bp, rx_cid_addr, BNX2_L2CTX_PG_BUF_SIZE, 0);
if (bp->rx_pg_ring_size) {
bnx2_init_rxbd_rings(bp->rx_pg_desc_ring,
@@ -4636,11 +4682,6 @@ bnx2_init_rx_ring(struct bnx2 *bp)
REG_WR(bp, BNX2_MQ_MAP_L2_3, BNX2_MQ_MAP_L2_3_DEFAULT);
}
- val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE;
- val |= BNX2_L2CTX_CTX_TYPE_SIZE_L2;
- val |= 0x02 << 8;
- bnx2_ctx_wr(bp, rx_cid_addr, BNX2_L2CTX_CTX_TYPE, val);
-
val = (u64) bp->rx_desc_mapping[0] >> 32;
bnx2_ctx_wr(bp, rx_cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index c5fe340..3aa0364 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -348,6 +348,12 @@ struct l2_fhdr {
#define BNX2_L2CTX_BD_PRE_READ 0x00000000
#define BNX2_L2CTX_CTX_SIZE 0x00000000
#define BNX2_L2CTX_CTX_TYPE 0x00000000
+#define BNX2_L2CTX_LO_WATER_MARK_DEFAULT 32
+#define BNX2_L2CTX_LO_WATER_MARK_SCALE 4
+#define BNX2_L2CTX_LO_WATER_MARK_DIS 0
+#define BNX2_L2CTX_HI_WATER_MARK_SHIFT 4
+#define BNX2_L2CTX_HI_WATER_MARK_SCALE 16
+#define BNX2_L2CTX_WATER_MARKS_MSK 0x000000ff
#define BNX2_L2CTX_CTX_TYPE_SIZE_L2 ((0x20/20)<<16)
#define BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE (0xf<<28)
#define BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_UNDEFINED (0<<28)
@@ -4494,6 +4500,9 @@ struct l2_fhdr {
#define BNX2_MQ_MAP_L2_3_ENA (0x1L<<31)
#define BNX2_MQ_MAP_L2_3_DEFAULT 0x82004646
+#define BNX2_MQ_MAP_L2_5 0x00003d34
+#define BNX2_MQ_MAP_L2_5_ARM (0x3L<<26)
+
/*
* tsch_reg definition
* offset: 0x4c00
@@ -6405,7 +6414,7 @@ struct l2_fhdr {
#define RX_COPY_THRESH 128
-#define BNX2_MISC_ENABLE_DEFAULT 0x7ffffff
+#define BNX2_MISC_ENABLE_DEFAULT 0x17ffffff
#define DMA_READ_CHANS 5
#define DMA_WRITE_CHANS 3
--
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