[PATCH 1/1 2.6.29] cxgb3 - enable lro control through ethtool

Divy Le Ray
2008-10-29T05:40:51Z

From: Divy Le Ray <divy@chelsio.com>

Implement ethtool's get_flags and set_flags methods.
It enables ethtool to control the LRO settings.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
---

drivers/net/cxgb3/cxgb3_main.c | 69 +++++++++++++++++++++++++++++++++-------
1 files changed, 57 insertions(+), 12 deletions(-)

diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 1ace41a..e1746ee 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -494,6 +494,36 @@ static void enable_all_napi(struct adapter *adap)
}

/**
+ * set_qset_lro - Turn a queue set's LRO capability on and off
+ * @dev: the device the qset is attached to
+ * @qset_idx: the queue set index
+ * @val: the LRO switch
+ *
+ * Sets LRO on or off for a particular queue set.
+ * the device's features flag is updated to reflect the LRO
+ * capability when all queues belonging to the device are
+ * in the same state.
+ */
+static void set_qset_lro(struct net_device *dev, int qset_idx, int val)
+{
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+ int i, lro_on = 1;
+
+ adapter->params.sge.qset[qset_idx].lro = !!val;
+ adapter->sge.qs[qset_idx].lro_enabled = !!val;
+
+ /* let ethtool report LRO on only if all queues are LRO enabled */
+ for (i = pi->first_qset; i < pi->first_qset + pi->nqsets; ++i)
+ lro_on &= adapter->params.sge.qset[i].lro;
+
+ if (lro_on)
+ dev->features |= NETIF_F_LRO;
+ else
+ dev->features &= ~NETIF_F_LRO;
+}
+
+/**
* setup_sge_qsets - configure SGE Tx/Rx/response queues
* @adap: the adapter
*
@@ -516,8 +546,7 @@ static int setup_sge_qsets(struct adapter *adap)
pi->qs = &adap->sge.qs[pi->first_qset];
for (j = pi->first_qset; j < pi->first_qset + pi->nqsets;
++j, ++qset_idx) {
- if (!pi->rx_csum_offload)
- adap->params.sge.qset[qset_idx].lro = 0;
+ set_qset_lro(dev, qset_idx, pi->rx_csum_offload);
err = t3_sge_alloc_qset(adap, qset_idx, 1,
(adap->flags & USING_MSIX) ? qset_idx + 1 :
irq_idx,
@@ -1632,13 +1661,10 @@ static int set_rx_csum(struct net_device *dev, u32 data)

p->rx_csum_offload = data;
if (!data) {
- struct adapter *adap = p->adapter;
int i;

- for (i = p->first_qset; i < p->first_qset + p->nqsets; i++) {
- adap->params.sge.qset[i].lro = 0;
- adap->sge.qs[i].lro_enabled = 0;
- }
+ for (i = p->first_qset; i < p->first_qset + p->nqsets; i++)
+ set_qset_lro(dev, i, 0);
}
return 0;
}
@@ -1793,6 +1819,25 @@ static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
memset(&wol->sopass, 0, sizeof(wol->sopass));
}

+static int cxgb3_set_flags(struct net_device *dev, u32 data)
+{
+ struct port_info *pi = netdev_priv(dev);
+ int i;
+
+ if (data & ETH_FLAG_LRO) {
+ if (!pi->rx_csum_offload)
+ return -EINVAL;
+
+ for (i = pi->first_qset; i < pi->first_qset + pi->nqsets; i++)
+ set_qset_lro(dev, i, 1);
+
+ } else
+ for (i = pi->first_qset; i < pi->first_qset + pi->nqsets; i++)
+ set_qset_lro(dev, i, 0);
+
+ return 0;
+}
+
static const struct ethtool_ops cxgb_ethtool_ops = {
.get_settings = get_settings,
.set_settings = set_settings,
@@ -1822,6 +1867,8 @@ static const struct ethtool_ops cxgb_ethtool_ops = {
.get_regs = get_regs,
.get_wol = get_wol,
.set_tso = ethtool_op_set_tso,
+ .get_flags = ethtool_op_get_flags,
+ .set_flags = cxgb3_set_flags,
};

static int in_range(int val, int lo, int hi)
@@ -1938,11 +1985,9 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
}
}
}
- if (t.lro >= 0) {
- struct sge_qset *qs = &adapter->sge.qs[t.qset_idx];
- q->lro = t.lro;
- qs->lro_enabled = t.lro;
- }
+ if (t.lro >= 0)
+ set_qset_lro(dev, t.qset_idx, t.lro);
+
break;
}
case CHELSIO_GET_QSET_PARAMS:{