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Message-ID: <1331340715.2537.18.camel@bwh-desktop>
Date: Sat, 10 Mar 2012 00:51:55 +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 net-next 08/10] sfc: Run event/IRQ self-test asynchronously
when interface is brought up
Generate a test event on each event queue whenever the interface is
brought up, then after 1 second check that we have either handled a
test event or handled another IRQ for each event queue.
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/ethernet/sfc/efx.c | 6 ++++-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/net_driver.h | 6 +++-
drivers/net/ethernet/sfc/nic.c | 4 +-
drivers/net/ethernet/sfc/nic.h | 2 +-
drivers/net/ethernet/sfc/selftest.c | 35 +++++++++++++++++++++++++++++++++
drivers/net/ethernet/sfc/selftest.h | 3 ++
7 files changed, 51 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 00e13ab..7683e53 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -25,6 +25,7 @@
#include "net_driver.h"
#include "efx.h"
#include "nic.h"
+#include "selftest.h"
#include "mcdi.h"
#include "workarounds.h"
@@ -1564,8 +1565,9 @@ static void efx_start_all(struct efx_nic *efx)
* since we're holding the rtnl_lock at this point. */
static void efx_flush_all(struct efx_nic *efx)
{
- /* Make sure the hardware monitor is stopped */
+ /* Make sure the hardware monitor and event self-test are stopped */
cancel_delayed_work_sync(&efx->monitor_work);
+ efx_selftest_async_cancel(efx);
/* Stop scheduled port reconfigurations */
cancel_work_sync(&efx->mac_work);
}
@@ -1825,6 +1827,7 @@ static int efx_net_open(struct net_device *net_dev)
efx_link_status_changed(efx);
efx_start_all(efx);
+ efx_selftest_async_start(efx);
return 0;
}
@@ -2375,6 +2378,7 @@ static int efx_init_struct(struct efx_nic *efx, const struct efx_nic_type *type,
#endif
INIT_WORK(&efx->reset_work, efx_reset_work);
INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
+ INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work);
efx->pci_dev = pci_dev;
efx->msg_enable = debug;
efx->state = STATE_INIT;
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 4debfe0..be8f915 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -148,7 +148,7 @@ static inline void efx_schedule_channel(struct efx_channel *channel)
static inline void efx_schedule_channel_irq(struct efx_channel *channel)
{
- channel->last_irq_cpu = raw_smp_processor_id();
+ channel->event_test_cpu = raw_smp_processor_id();
efx_schedule_channel(channel);
}
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 0b95505..27fe85f 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -325,7 +325,7 @@ enum efx_rx_alloc_method {
* @eventq_mask: Event queue pointer mask
* @eventq_read_ptr: Event queue read pointer
* @last_eventq_read_ptr: Last event queue read pointer value.
- * @last_irq_cpu: Last CPU to handle interrupt for this channel
+ * @event_test_cpu: Last CPU to handle interrupt or test event for this channel
* @irq_count: Number of IRQs since last adaptive moderation decision
* @irq_mod_score: IRQ moderation score
* @rx_alloc_level: Watermark based heuristic counter for pushing descriptors
@@ -356,8 +356,8 @@ struct efx_channel {
unsigned int eventq_mask;
unsigned int eventq_read_ptr;
unsigned int last_eventq_read_ptr;
+ int event_test_cpu;
- int last_irq_cpu;
unsigned int irq_count;
unsigned int irq_mod_score;
#ifdef CONFIG_RFS_ACCEL
@@ -678,6 +678,7 @@ struct vfdi_status;
* @irq_status: Interrupt status buffer
* @irq_zero_count: Number of legacy IRQs seen with queue flags == 0
* @irq_level: IRQ level/index for IRQs not triggered by an event queue
+ * @selftest_work: Work item for asynchronous self-test
* @mtd_list: List of MTDs attached to the NIC
* @nic_data: Hardware dependent state
* @mac_lock: MAC access lock. Protects @port_enabled, @phy_mode,
@@ -791,6 +792,7 @@ struct efx_nic {
struct efx_buffer irq_status;
unsigned irq_zero_count;
unsigned irq_level;
+ struct delayed_work selftest_work;
#ifdef CONFIG_SFC_MTD
struct list_head mtd_list;
diff --git a/drivers/net/ethernet/sfc/nic.c b/drivers/net/ethernet/sfc/nic.c
index 4c47b75..4a9a5be 100644
--- a/drivers/net/ethernet/sfc/nic.c
+++ b/drivers/net/ethernet/sfc/nic.c
@@ -1083,7 +1083,7 @@ efx_handle_generated_event(struct efx_channel *channel, efx_qword_t *event)
code = _EFX_CHANNEL_MAGIC_CODE(magic);
if (magic == EFX_CHANNEL_MAGIC_TEST(channel)) {
- /* ignore */
+ channel->event_test_cpu = raw_smp_processor_id();
} else if (rx_queue && magic == EFX_CHANNEL_MAGIC_FILL(rx_queue)) {
/* The queue must be empty, so we won't receive any rx
* events, so efx_process_channel() won't refill the
@@ -1334,7 +1334,7 @@ void efx_nic_remove_eventq(struct efx_channel *channel)
void efx_nic_event_test_start(struct efx_channel *channel)
{
- channel->last_irq_cpu = -1;
+ channel->event_test_cpu = -1;
smp_wmb();
efx_magic_event(channel, EFX_CHANNEL_MAGIC_TEST(channel));
}
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index e0e8596..f46e2ce 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -311,7 +311,7 @@ extern void falcon_irq_ack_a1(struct efx_nic *efx);
static inline int efx_nic_event_test_irq_cpu(struct efx_channel *channel)
{
- return ACCESS_ONCE(channel->last_irq_cpu);
+ return ACCESS_ONCE(channel->event_test_cpu);
}
static inline int efx_nic_irq_test_irq_cpu(struct efx_nic *efx)
{
diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
index aa4ab53..de4c006 100644
--- a/drivers/net/ethernet/sfc/selftest.c
+++ b/drivers/net/ethernet/sfc/selftest.c
@@ -702,6 +702,8 @@ int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
enum reset_type reset_method = RESET_TYPE_INVISIBLE;
int rc_test = 0, rc_reset = 0, rc;
+ efx_selftest_async_cancel(efx);
+
/* Online (i.e. non-disruptive) testing
* This checks interrupt generation, event delivery and PHY presence. */
@@ -794,3 +796,36 @@ int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
return rc_test;
}
+void efx_selftest_async_start(struct efx_nic *efx)
+{
+ struct efx_channel *channel;
+
+ efx_for_each_channel(channel, efx)
+ efx_nic_event_test_start(channel);
+ schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT);
+}
+
+void efx_selftest_async_cancel(struct efx_nic *efx)
+{
+ cancel_delayed_work_sync(&efx->selftest_work);
+}
+
+void efx_selftest_async_work(struct work_struct *data)
+{
+ struct efx_nic *efx = container_of(data, struct efx_nic,
+ selftest_work.work);
+ struct efx_channel *channel;
+ int cpu;
+
+ efx_for_each_channel(channel, efx) {
+ cpu = efx_nic_event_test_irq_cpu(channel);
+ if (cpu < 0)
+ netif_err(efx, ifup, efx->net_dev,
+ "channel %d failed to trigger an interrupt\n",
+ channel->channel);
+ else
+ netif_dbg(efx, ifup, efx->net_dev,
+ "channel %d triggered interrupt on CPU %d\n",
+ channel->channel, cpu);
+ }
+}
diff --git a/drivers/net/ethernet/sfc/selftest.h b/drivers/net/ethernet/sfc/selftest.h
index 87abe2a..aed24b7 100644
--- a/drivers/net/ethernet/sfc/selftest.h
+++ b/drivers/net/ethernet/sfc/selftest.h
@@ -48,5 +48,8 @@ extern void efx_loopback_rx_packet(struct efx_nic *efx,
extern int efx_selftest(struct efx_nic *efx,
struct efx_self_tests *tests,
unsigned flags);
+extern void efx_selftest_async_start(struct efx_nic *efx);
+extern void efx_selftest_async_cancel(struct efx_nic *efx);
+extern void efx_selftest_async_work(struct work_struct *data);
#endif /* EFX_SELFTEST_H */
--
1.7.7.6
--
Ben Hutchings, Staff Engineer, Solarflare
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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