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Date: Wed, 31 Jan 2007 19:12:27 -0600
From: Jay Cliburn <jacliburn@...lsouth.net>
To: jeff@...zik.org
Cc: csnook@...hat.com, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, atl1-devel@...ts.sourceforge.net
Subject: [PATCH 2.6.20-rc7 2/2] atl1: add ethtool set ring params functionality
From: Jay Cliburn <jacliburn@...lsouth.net>
Fix up some constants relating to max and min ring descriptor counts.
Also add functionality to enable ethtool to set tx and rx ring parameters.
Signed-off-by: Jay Cliburn <jacliburn@...lsouth.net>
---
drivers/net/atl1/atl1.h | 4 +-
drivers/net/atl1/atl1_ethtool.c | 78 ++++++++++++++++++++++++++++++++++++++-
2 files changed, 78 insertions(+), 4 deletions(-)
diff --git a/drivers/net/atl1/atl1.h b/drivers/net/atl1/atl1.h
index cc18016..da4bf87 100644
--- a/drivers/net/atl1/atl1.h
+++ b/drivers/net/atl1/atl1.h
@@ -44,11 +44,11 @@ struct atl1_adapter;
#define ATL1_MAX_INTR 3
#define ATL1_DEFAULT_TPD 256
-#define ATL1_MAX_TPD 1023
+#define ATL1_MAX_TPD 1024
#define ATL1_MIN_TPD 64
#define ATL1_DEFAULT_RFD 512
#define ATL1_MIN_RFD 128
-#define ATL1_MAX_RFD 2047
+#define ATL1_MAX_RFD 2048
#define ATL1_GET_DESC(R, i, type) (&(((type *)((R)->desc))[i]))
#define ATL1_RFD_DESC(R, i) ATL1_GET_DESC(R, i, struct rx_free_desc)
diff --git a/drivers/net/atl1/atl1_ethtool.c b/drivers/net/atl1/atl1_ethtool.c
index 8ce4d06..b7cd7b3 100644
--- a/drivers/net/atl1/atl1_ethtool.c
+++ b/drivers/net/atl1/atl1_ethtool.c
@@ -308,8 +308,8 @@ static void atl1_get_ringparam(struct net_device *netdev,
struct atl1_tpd_ring *txdr = &adapter->tpd_ring;
struct atl1_rfd_ring *rxdr = &adapter->rfd_ring;
- ring->rx_max_pending = 2048;
- ring->tx_max_pending = 1024;
+ ring->rx_max_pending = ATL1_MAX_RFD;
+ ring->tx_max_pending = ATL1_MAX_TPD;
ring->rx_mini_max_pending = 0;
ring->rx_jumbo_max_pending = 0;
ring->rx_pending = rxdr->count;
@@ -318,6 +318,79 @@ static void atl1_get_ringparam(struct net_device *netdev,
ring->rx_jumbo_pending = 0;
}
+static int atl1_set_ringparam (struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct atl1_adapter *adapter = netdev_priv(netdev);
+ struct atl1_tpd_ring *tpdr = &adapter->tpd_ring;
+ struct atl1_rrd_ring *rrdr = &adapter->rrd_ring;
+ struct atl1_rfd_ring *rfdr = &adapter->rfd_ring;
+
+ struct atl1_tpd_ring tpd_old, tpd_new;
+ struct atl1_rfd_ring rfd_old, rfd_new;
+ struct atl1_rrd_ring rrd_old, rrd_new;
+ struct atl1_ring_header rhdr_old, rhdr_new;
+ int err;
+
+ tpd_old = adapter->tpd_ring;
+ rfd_old = adapter->rfd_ring;
+ rrd_old = adapter->rrd_ring;
+ rhdr_old = adapter->ring_header;
+
+ if (netif_running(adapter->netdev))
+ atl1_down(adapter);
+
+ rfdr->count = (u16) max(ring->rx_pending, (u32) ATL1_MIN_RFD);
+ rfdr->count = rfdr->count > ATL1_MAX_RFD ? ATL1_MAX_RFD :
+ rfdr->count;
+ rfdr->count = (rfdr->count + 3) & ~3;
+ rrdr->count = rfdr->count;
+
+ tpdr->count = (u16) max(ring->tx_pending, (u32) ATL1_MIN_TPD);
+ tpdr->count = tpdr->count > ATL1_MAX_TPD ? ATL1_MAX_TPD :
+ tpdr->count;
+ tpdr->count = (tpdr->count + 3) & ~3;
+
+ if (netif_running(adapter->netdev)) {
+ /* try to get new resources before deleting old */
+ err = atl1_setup_ring_resources(adapter);
+ if (err)
+ goto err_setup_ring;
+
+ /*
+ * save the new, restore the old in order to free it,
+ * then restore the new back again
+ */
+
+ rfd_new = adapter->rfd_ring;
+ rrd_new = adapter->rrd_ring;
+ tpd_new = adapter->tpd_ring;
+ rhdr_new = adapter->ring_header;
+ adapter->rfd_ring = rfd_old;
+ adapter->rrd_ring = rrd_old;
+ adapter->tpd_ring = tpd_old;
+ adapter->ring_header = rhdr_old;
+ atl1_free_ring_resources(adapter);
+ adapter->rfd_ring = rfd_new;
+ adapter->rrd_ring = rrd_new;
+ adapter->tpd_ring = tpd_new;
+ adapter->ring_header = rhdr_new;
+
+ err = atl1_up(adapter);
+ if (err)
+ return err;
+ }
+ return 0;
+
+err_setup_ring:
+ adapter->rfd_ring = rfd_old;
+ adapter->rrd_ring = rrd_old;
+ adapter->tpd_ring = tpd_old;
+ adapter->ring_header = rhdr_old;
+ atl1_up(adapter);
+ return err;
+}
+
static void atl1_get_pauseparam(struct net_device *netdev,
struct ethtool_pauseparam *epause)
{
@@ -417,6 +490,7 @@ const struct ethtool_ops atl1_ethtool_ops = {
.get_wol = atl1_get_wol,
.set_wol = atl1_set_wol,
.get_ringparam = atl1_get_ringparam,
+ .set_ringparam = atl1_set_ringparam,
.get_pauseparam = atl1_get_pauseparam,
.set_pauseparam = atl1_set_pauseparam,
.get_rx_csum = atl1_get_rx_csum,
-
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