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-rw-r--r--drivers/net/ethernet/sfc/efx.c8
-rw-r--r--drivers/net/ethernet/sfc/efx.h9
-rw-r--r--drivers/net/ethernet/sfc/net_driver.h14
-rw-r--r--drivers/net/ethernet/sfc/rx.c46
4 files changed, 45 insertions, 32 deletions
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 0fa9972027db..38d186b949be 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1969,6 +1969,8 @@ static int efx_probe_filters(struct efx_nic *efx)
++i)
channel->rps_flow_id[i] =
RPS_FLOW_ID_INVALID;
+ channel->rfs_expire_index = 0;
+ channel->rfs_filter_count = 0;
}
if (!success) {
@@ -1978,8 +1980,6 @@ static int efx_probe_filters(struct efx_nic *efx)
rc = -ENOMEM;
goto out_unlock;
}
-
- efx->rps_expire_index = efx->rps_expire_channel = 0;
}
#endif
out_unlock:
@@ -1993,8 +1993,10 @@ static void efx_remove_filters(struct efx_nic *efx)
#ifdef CONFIG_RFS_ACCEL
struct efx_channel *channel;
- efx_for_each_channel(channel, efx)
+ efx_for_each_channel(channel, efx) {
+ flush_work(&channel->filter_work);
kfree(channel->rps_flow_id);
+ }
#endif
down_write(&efx->filter_sem);
efx->type->filter_table_remove(efx);
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 45c7ae4114ec..e58c2b6d64d9 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -166,15 +166,16 @@ static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
#ifdef CONFIG_RFS_ACCEL
int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
u16 rxq_index, u32 flow_id);
-bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
+bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota);
static inline void efx_filter_rfs_expire(struct work_struct *data)
{
struct efx_channel *channel = container_of(data, struct efx_channel,
filter_work);
+ unsigned int time = jiffies - channel->rfs_last_expiry, quota;
- if (channel->rfs_filters_added >= 60 &&
- __efx_filter_rfs_expire(channel->efx, 100))
- channel->rfs_filters_added -= 60;
+ quota = channel->rfs_filter_count * time / (30 * HZ);
+ if (quota > 20 && __efx_filter_rfs_expire(channel, min(channel->rfs_filter_count, quota)))
+ channel->rfs_last_expiry += time;
}
#define efx_filter_rfs_enabled() 1
#else
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 04e49eac7327..5b1b882f6c67 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -439,6 +439,11 @@ enum efx_sync_events_state {
* @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
+ * @rfs_filter_count: number of accelerated RFS filters currently in place;
+ * equals the count of @rps_flow_id slots filled
+ * @rfs_last_expiry: value of jiffies last time some accelerated RFS filters
+ * were checked for expiry
+ * @rfs_expire_index: next accelerated RFS filter ID to check for expiry
* @filter_work: Work item for efx_filter_rfs_expire()
* @rps_flow_id: Flow IDs of filters allocated for accelerated RFS,
* indexed by filter ID
@@ -489,7 +494,9 @@ struct efx_channel {
unsigned int irq_count;
unsigned int irq_mod_score;
#ifdef CONFIG_RFS_ACCEL
- unsigned int rfs_filters_added;
+ unsigned int rfs_filter_count;
+ unsigned int rfs_last_expiry;
+ unsigned int rfs_expire_index;
struct work_struct filter_work;
#define RPS_FLOW_ID_INVALID 0xFFFFFFFF
u32 *rps_flow_id;
@@ -923,9 +930,6 @@ struct efx_async_filter_insertion {
* @filter_sem: Filter table rw_semaphore, protects existence of @filter_state
* @filter_state: Architecture-dependent filter table state
* @rps_mutex: Protects RPS state of all channels
- * @rps_expire_channel: Next channel to check for expiry
- * @rps_expire_index: Next index to check for expiry in
- * @rps_expire_channel's @rps_flow_id
* @rps_slot_map: bitmap of in-flight entries in @rps_slot
* @rps_slot: array of ARFS insertion requests for efx_filter_rfs_work()
* @rps_hash_lock: Protects ARFS filter mapping state (@rps_hash_table and
@@ -1096,8 +1100,6 @@ struct efx_nic {
void *filter_state;
#ifdef CONFIG_RFS_ACCEL
struct mutex rps_mutex;
- unsigned int rps_expire_channel;
- unsigned int rps_expire_index;
unsigned long rps_slot_map;
struct efx_async_filter_insertion rps_slot[EFX_RPS_MAX_IN_FLIGHT];
spinlock_t rps_hash_lock;
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index bec261905530..bbf2393f7599 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -988,6 +988,7 @@ static void efx_filter_rfs_work(struct work_struct *data)
rc = efx->type->filter_insert(efx, &req->spec, true);
if (rc >= 0)
+ /* Discard 'priority' part of EF10+ filter ID (mcdi_filters) */
rc %= efx->type->max_rx_ip_filters;
if (efx->rps_hash_table) {
spin_lock_bh(&efx->rps_hash_lock);
@@ -1012,8 +1013,9 @@ static void efx_filter_rfs_work(struct work_struct *data)
* later.
*/
mutex_lock(&efx->rps_mutex);
+ if (channel->rps_flow_id[rc] == RPS_FLOW_ID_INVALID)
+ channel->rfs_filter_count++;
channel->rps_flow_id[rc] = req->flow_id;
- ++channel->rfs_filters_added;
mutex_unlock(&efx->rps_mutex);
if (req->spec.ether_type == htons(ETH_P_IP))
@@ -1139,38 +1141,44 @@ out_clear:
return rc;
}
-bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned int quota)
+bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota)
{
bool (*expire_one)(struct efx_nic *efx, u32 flow_id, unsigned int index);
- unsigned int channel_idx, index, size;
+ struct efx_nic *efx = channel->efx;
+ unsigned int index, size, start;
u32 flow_id;
if (!mutex_trylock(&efx->rps_mutex))
return false;
expire_one = efx->type->filter_rfs_expire_one;
- channel_idx = efx->rps_expire_channel;
- index = efx->rps_expire_index;
+ index = channel->rfs_expire_index;
+ start = index;
size = efx->type->max_rx_ip_filters;
- while (quota--) {
- struct efx_channel *channel = efx_get_channel(efx, channel_idx);
+ while (quota) {
flow_id = channel->rps_flow_id[index];
- if (flow_id != RPS_FLOW_ID_INVALID &&
- expire_one(efx, flow_id, index)) {
- netif_info(efx, rx_status, efx->net_dev,
- "expired filter %d [queue %u flow %u]\n",
- index, channel_idx, flow_id);
- channel->rps_flow_id[index] = RPS_FLOW_ID_INVALID;
+ if (flow_id != RPS_FLOW_ID_INVALID) {
+ quota--;
+ if (expire_one(efx, flow_id, index)) {
+ netif_info(efx, rx_status, efx->net_dev,
+ "expired filter %d [channel %u flow %u]\n",
+ index, channel->channel, flow_id);
+ channel->rps_flow_id[index] = RPS_FLOW_ID_INVALID;
+ channel->rfs_filter_count--;
+ }
}
- if (++index == size) {
- if (++channel_idx == efx->n_channels)
- channel_idx = 0;
+ if (++index == size)
index = 0;
- }
+ /* If we were called with a quota that exceeds the total number
+ * of filters in the table (which should never happen), ensure
+ * that we don't loop forever - stop when we've examined every
+ * row of the table.
+ */
+ if (WARN_ON(index == start && quota))
+ break;
}
- efx->rps_expire_channel = channel_idx;
- efx->rps_expire_index = index;
+ channel->rfs_expire_index = index;
mutex_unlock(&efx->rps_mutex);
return true;
}