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Message-ID: <20091222022147.30220.42433.stgit@savbu-pc100.cisco.com>
Date: Mon, 21 Dec 2009 18:21:47 -0800
From: Scott Feldman <scofeldm@...co.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org
Subject: [net-next PATCH 5/6] enic: feature add: add ethtool -c/C support
From: Scott Feldman <scofeldm@...co.com>
Only rx_usec and tx_usec options for ethtool -C are settable as those
are the only settings that make sense to HW. Adds driver reporting of
intr coalescing timer value in usec units rather than HW units.
Signed-off-by: Vasanthy Kolluri <vkolluri@...co.com>
Signed-off-by: Scott Feldman <scofeldm@...co.com>
---
drivers/net/enic/enic.h | 2 +
drivers/net/enic/enic_main.c | 65 +++++++++++++++++++++++++++++++++++++++++-
drivers/net/enic/enic_res.c | 12 +++++---
drivers/net/enic/vnic_enet.h | 5 +++
drivers/net/enic/vnic_intr.c | 8 +++++
drivers/net/enic/vnic_intr.h | 2 +
6 files changed, 86 insertions(+), 8 deletions(-)
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index b090d65..ee01f5a 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -93,6 +93,8 @@ struct enic {
unsigned int mc_count;
int csum_rx_enabled;
u32 port_mtu;
+ u32 rx_coalesce_usecs;
+ u32 tx_coalesce_usecs;
/* work queue cache line section */
____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX];
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 019b148..81cc68d 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -261,7 +261,63 @@ static void enic_set_msglevel(struct net_device *netdev, u32 value)
enic->msg_enable = value;
}
-static const struct ethtool_ops enic_ethtool_ops = {
+static int enic_get_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *ecmd)
+{
+ struct enic *enic = netdev_priv(netdev);
+
+ ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
+ ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
+
+ return 0;
+}
+
+static int enic_set_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *ecmd)
+{
+ struct enic *enic = netdev_priv(netdev);
+ u32 tx_coalesce_usecs;
+ u32 rx_coalesce_usecs;
+
+ tx_coalesce_usecs = min_t(u32,
+ INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
+ ecmd->tx_coalesce_usecs);
+ rx_coalesce_usecs = min_t(u32,
+ INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
+ ecmd->rx_coalesce_usecs);
+
+ switch (vnic_dev_get_intr_mode(enic->vdev)) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ if (tx_coalesce_usecs != rx_coalesce_usecs)
+ return -EINVAL;
+
+ vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
+ INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
+ break;
+ case VNIC_DEV_INTR_MODE_MSI:
+ if (tx_coalesce_usecs != rx_coalesce_usecs)
+ return -EINVAL;
+
+ vnic_intr_coalescing_timer_set(&enic->intr[0],
+ INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
+ break;
+ case VNIC_DEV_INTR_MODE_MSIX:
+ vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
+ INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
+ vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
+ INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
+ break;
+ default:
+ break;
+ }
+
+ enic->tx_coalesce_usecs = tx_coalesce_usecs;
+ enic->rx_coalesce_usecs = rx_coalesce_usecs;
+
+ return 0;
+}
+
+static struct ethtool_ops enic_ethtool_ops = {
.get_settings = enic_get_settings,
.get_drvinfo = enic_get_drvinfo,
.get_msglevel = enic_get_msglevel,
@@ -278,6 +334,8 @@ static const struct ethtool_ops enic_ethtool_ops = {
.set_sg = ethtool_op_set_sg,
.get_tso = ethtool_op_get_tso,
.set_tso = enic_set_tso,
+ .get_coalesce = enic_get_coalesce,
+ .set_coalesce = enic_set_coalesce,
.get_flags = ethtool_op_get_flags,
.set_flags = ethtool_op_set_flags,
};
@@ -363,12 +421,12 @@ static void enic_mtu_check(struct enic *enic)
u32 mtu = vnic_dev_mtu(enic->vdev);
if (mtu && mtu != enic->port_mtu) {
+ enic->port_mtu = mtu;
if (mtu < enic->netdev->mtu)
printk(KERN_WARNING PFX
"%s: interface MTU (%d) set higher "
"than switch port MTU (%d)\n",
enic->netdev->name, enic->netdev->mtu, mtu);
- enic->port_mtu = mtu;
}
}
@@ -1990,6 +2048,9 @@ static int __devinit enic_probe(struct pci_dev *pdev,
goto err_out_dev_deinit;
}
+ enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
+ enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
+
netdev->netdev_ops = &enic_netdev_ops;
netdev->watchdog_timeo = 2 * HZ;
netdev->ethtool_ops = &enic_ethtool_ops;
diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
index a605da1..02839bf 100644
--- a/drivers/net/enic/enic_res.c
+++ b/drivers/net/enic/enic_res.c
@@ -66,9 +66,9 @@ int enic_get_vnic_config(struct enic *enic)
GET_CONFIG(wq_desc_count);
GET_CONFIG(rq_desc_count);
GET_CONFIG(mtu);
- GET_CONFIG(intr_timer);
GET_CONFIG(intr_timer_type);
GET_CONFIG(intr_mode);
+ GET_CONFIG(intr_timer_usec);
c->wq_desc_count =
min_t(u32, ENIC_MAX_WQ_DESCS,
@@ -88,15 +88,17 @@ int enic_get_vnic_config(struct enic *enic)
max_t(u16, ENIC_MIN_MTU,
c->mtu));
- c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
+ c->intr_timer_usec = min_t(u32,
+ INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
+ c->intr_timer_usec);
printk(KERN_INFO PFX "vNIC MAC addr %pM wq/rq %d/%d\n",
enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
- "intr timer %d\n",
+ "intr timer %d usec\n",
c->mtu, ENIC_SETTING(enic, TXCSUM),
ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
- ENIC_SETTING(enic, LRO), c->intr_timer);
+ ENIC_SETTING(enic, LRO), c->intr_timer_usec);
return 0;
}
@@ -303,7 +305,7 @@ void enic_init_vnic_resources(struct enic *enic)
for (i = 0; i < enic->intr_count; i++) {
vnic_intr_init(&enic->intr[i],
- enic->config.intr_timer,
+ INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec),
enic->config.intr_timer_type,
mask_on_assertion);
}
diff --git a/drivers/net/enic/vnic_enet.h b/drivers/net/enic/vnic_enet.h
index 6332ac9..8eeb675 100644
--- a/drivers/net/enic/vnic_enet.h
+++ b/drivers/net/enic/vnic_enet.h
@@ -20,6 +20,10 @@
#ifndef _VNIC_ENIC_H_
#define _VNIC_ENIC_H_
+/* Hardware intr coalesce timer is in units of 1.5us */
+#define INTR_COALESCE_USEC_TO_HW(usec) ((usec) * 2/3)
+#define INTR_COALESCE_HW_TO_USEC(usec) ((usec) * 3/2)
+
/* Device-specific region: enet configuration */
struct vnic_enet_config {
u32 flags;
@@ -30,6 +34,7 @@ struct vnic_enet_config {
u8 intr_timer_type;
u8 intr_mode;
char devname[16];
+ u32 intr_timer_usec;
};
#define VENETF_TSO 0x1 /* TSO enabled */
diff --git a/drivers/net/enic/vnic_intr.c b/drivers/net/enic/vnic_intr.c
index 1f8786d..3934309 100644
--- a/drivers/net/enic/vnic_intr.c
+++ b/drivers/net/enic/vnic_intr.c
@@ -50,12 +50,18 @@ int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
unsigned int coalescing_type, unsigned int mask_on_assertion)
{
- iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
+ vnic_intr_coalescing_timer_set(intr, coalescing_timer);
iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
iowrite32(0, &intr->ctrl->int_credits);
}
+void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
+ unsigned int coalescing_timer)
+{
+ iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
+}
+
void vnic_intr_clean(struct vnic_intr *intr)
{
iowrite32(0, &intr->ctrl->int_credits);
diff --git a/drivers/net/enic/vnic_intr.h b/drivers/net/enic/vnic_intr.h
index f79a722..2fe6c63 100644
--- a/drivers/net/enic/vnic_intr.h
+++ b/drivers/net/enic/vnic_intr.h
@@ -102,6 +102,8 @@ int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
unsigned int index);
void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
unsigned int coalescing_type, unsigned int mask_on_assertion);
+void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
+ unsigned int coalescing_timer);
void vnic_intr_clean(struct vnic_intr *intr);
#endif /* _VNIC_INTR_H_ */
--
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