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Date: Fri, 12 Dec 2008 12:52:30 +0000
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: [PATCH 11/33] sfc: Provide hints to irqbalance daemon
Allocate IRQs with the name format <device>[-<type>]-<number> so that
future versions of irqbalanced understand what we're doing.
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/sfc/efx.c | 24 ++++++++++++++++++++++++
drivers/net/sfc/falcon.c | 2 +-
drivers/net/sfc/net_driver.h | 2 ++
3 files changed, 27 insertions(+), 1 deletions(-)
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 58cbbd5..183a440 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -356,6 +356,27 @@ static int efx_probe_channel(struct efx_channel *channel)
}
+static void efx_set_channel_names(struct efx_nic *efx)
+{
+ struct efx_channel *channel;
+ const char *type = "";
+ int number;
+
+ efx_for_each_channel(channel, efx) {
+ number = channel->channel;
+ if (efx->n_channels > efx->n_rx_queues) {
+ if (channel->channel < efx->n_rx_queues) {
+ type = "-rx";
+ } else {
+ type = "-tx";
+ number -= efx->n_rx_queues;
+ }
+ }
+ snprintf(channel->name, sizeof(channel->name),
+ "%s%s-%d", efx->name, type, number);
+ }
+}
+
/* Channels are shutdown and reinitialised whilst the NIC is running
* to propagate configuration changes (mtu, checksum offload), or
* to clear hardware error conditions
@@ -1002,6 +1023,7 @@ static int efx_probe_all(struct efx_nic *efx)
goto fail3;
}
}
+ efx_set_channel_names(efx);
return 0;
@@ -1483,6 +1505,7 @@ static int efx_netdev_event(struct notifier_block *this,
strcpy(efx->name, net_dev->name);
efx_mtd_rename(efx);
+ efx_set_channel_names(efx);
}
return NOTIFY_DONE;
@@ -1516,6 +1539,7 @@ static int efx_register_netdev(struct efx_nic *efx)
return rc;
}
strcpy(efx->name, net_dev->name);
+ efx_set_channel_names(efx);
return 0;
}
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 9563c13..7421945 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1585,7 +1585,7 @@ int falcon_init_interrupt(struct efx_nic *efx)
efx_for_each_channel(channel, efx) {
rc = request_irq(channel->irq, falcon_msi_interrupt,
IRQF_PROBE_SHARED, /* Not shared */
- efx->name, channel);
+ channel->name, channel);
if (rc) {
EFX_ERR(efx, "failed to hook IRQ %d\n", channel->irq);
goto fail2;
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 2c5b5fa..abff908 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -327,6 +327,7 @@ enum efx_rx_alloc_method {
*
* @efx: Associated Efx NIC
* @channel: Channel instance number
+ * @name: Name for channel and IRQ
* @used_flags: Channel is used by net driver
* @enabled: Channel enabled indicator
* @irq: IRQ number (MSI and MSI-X only)
@@ -357,6 +358,7 @@ enum efx_rx_alloc_method {
struct efx_channel {
struct efx_nic *efx;
int channel;
+ char name[IFNAMSIZ + 6];
int used_flags;
bool enabled;
int irq;
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
--
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