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Date: Sun, 12 Sep 2010 17:48:28 +0200
From: "Dmitry Kravkov" <dmitry@...adcom.com>
To: davem@...emloft.net, netdev@...r.kernel.org
cc: eric.dumazet@...il.com, eilong@...adcom.com
Subject: [PATCH net-next] bnx2x: Spread rx buffers between allocated
queues
Default number of rx buffers will be divided equally
between allocated queues. This will decrease amount of
pre-allocated buffers on systems with multiple CPUs.
User can override this behavior with ethtool -G.
Minimum amount of rx buffers per queue set to 128.
Reported-by: Eric Dumazet <eric.dumazet@...il.com>
Signed-off-by: Dmitry Kravkov <dmitry@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
drivers/net/bnx2x/bnx2x.h | 5 +++--
drivers/net/bnx2x/bnx2x_cmn.c | 6 +++++-
drivers/net/bnx2x/bnx2x_ethtool.c | 10 +++++++++-
drivers/net/bnx2x/bnx2x_main.c | 1 -
4 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/net/bnx2x/bnx2x.h b/drivers/net/bnx2x/bnx2x.h
index b6aaf22..64329c5 100644
--- a/drivers/net/bnx2x/bnx2x.h
+++ b/drivers/net/bnx2x/bnx2x.h
@@ -20,8 +20,8 @@
* (you will need to reboot afterwards) */
/* #define BNX2X_STOP_ON_ERROR */
-#define DRV_MODULE_VERSION "1.52.53-6"
-#define DRV_MODULE_RELDATE "2010/09/07"
+#define DRV_MODULE_VERSION "1.52.53-7"
+#define DRV_MODULE_RELDATE "2010/09/12"
#define BNX2X_BC_VER 0x040200
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
@@ -369,6 +369,7 @@ struct bnx2x_fastpath {
#define NUM_RX_BD (RX_DESC_CNT * NUM_RX_RINGS)
#define MAX_RX_BD (NUM_RX_BD - 1)
#define MAX_RX_AVAIL (MAX_RX_DESC_CNT * NUM_RX_RINGS - 2)
+#define MIN_RX_AVAIL 128
#define NEXT_RX_IDX(x) ((((x) & RX_DESC_MASK) == \
(MAX_RX_DESC_CNT - 1)) ? (x) + 3 : (x) + 1)
#define RX_BD(x) ((x) & MAX_RX_BD)
diff --git a/drivers/net/bnx2x/bnx2x_cmn.c b/drivers/net/bnx2x/bnx2x_cmn.c
index 7f1d291..efc7be4 100644
--- a/drivers/net/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/bnx2x/bnx2x_cmn.c
@@ -781,6 +781,10 @@ void bnx2x_init_rx_rings(struct bnx2x *bp)
ETH_MAX_AGGREGATION_QUEUES_E1H;
u16 ring_prod, cqe_ring_prod;
int i, j;
+ int rx_ring_size = bp->rx_ring_size ? bp->rx_ring_size :
+ MAX_RX_AVAIL/bp->num_queues;
+
+ rx_ring_size = max_t(int, MIN_RX_AVAIL, rx_ring_size);
bp->rx_buf_size = bp->dev->mtu + ETH_OVREHEAD + BNX2X_RX_ALIGN;
DP(NETIF_MSG_IFUP,
@@ -883,7 +887,7 @@ void bnx2x_init_rx_rings(struct bnx2x *bp)
/* Allocate BDs and initialize BD ring */
fp->rx_comp_cons = 0;
cqe_ring_prod = ring_prod = 0;
- for (i = 0; i < bp->rx_ring_size; i++) {
+ for (i = 0; i < rx_ring_size; i++) {
if (bnx2x_alloc_rx_skb(bp, fp, ring_prod) < 0) {
BNX2X_ERR("was only able to allocate "
"%d rx skbs on queue[%d]\n", i, j);
diff --git a/drivers/net/bnx2x/bnx2x_ethtool.c b/drivers/net/bnx2x/bnx2x_ethtool.c
index 6f939c5..d9748e9 100644
--- a/drivers/net/bnx2x/bnx2x_ethtool.c
+++ b/drivers/net/bnx2x/bnx2x_ethtool.c
@@ -961,7 +961,14 @@ static void bnx2x_get_ringparam(struct net_device *dev,
ering->rx_mini_max_pending = 0;
ering->rx_jumbo_max_pending = 0;
- ering->rx_pending = bp->rx_ring_size;
+ if (bp->rx_ring_size)
+ ering->rx_pending = bp->rx_ring_size;
+ else
+ if (bp->state == BNX2X_STATE_OPEN && bp->num_queues)
+ ering->rx_pending = MAX_RX_AVAIL/bp->num_queues;
+ else
+ ering->rx_pending = MAX_RX_AVAIL;
+
ering->rx_mini_pending = 0;
ering->rx_jumbo_pending = 0;
@@ -981,6 +988,7 @@ static int bnx2x_set_ringparam(struct net_device *dev,
}
if ((ering->rx_pending > MAX_RX_AVAIL) ||
+ (ering->rx_pending < MIN_RX_AVAIL) ||
(ering->tx_pending > MAX_TX_AVAIL) ||
(ering->tx_pending <= MAX_SKB_FRAGS + 4))
return -EINVAL;
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index 7ba3a6d..67587fe 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -6619,7 +6619,6 @@ static int __devinit bnx2x_init_bp(struct bnx2x *bp)
bp->mrrs = mrrs;
bp->tx_ring_size = MAX_TX_AVAIL;
- bp->rx_ring_size = MAX_RX_AVAIL;
bp->rx_csum = 1;
--
1.7.1
--
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