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Date: Tue, 21 Jul 2015 15:10:27 +0100
From: Edward Cree <ecree@...arflare.com>
To: David Miller <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <linux-net-drivers@...arflare.com>
Subject: [PATCH net-next 7/9] sfc: re-factor efx_ef10_filter_sync_rx_mode()
From: Daniel Pieczko <dpieczko@...arflare.com>
This change is only re-factoring; there are no changes to functionality
except for a slight elaboration of an error message (on mismatch filter
insertion failure).
Signed-off-by: Edward Cree <ecree@...arflare.com>
---
drivers/net/ethernet/sfc/ef10.c | 217 +++++++++++++++++++++++-----------------
1 file changed, 126 insertions(+), 91 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 784b46f..1704f71 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -49,6 +49,11 @@ enum {
*/
#define HUNT_FILTER_TBL_ROWS 8192
+struct efx_ef10_dev_addr {
+ u8 addr[ETH_ALEN];
+ u16 id;
+};
+
struct efx_ef10_filter_table {
/* The RX match field masks supported by this fw & hw, in order of priority */
enum efx_filter_match_flags rx_match_flags[
@@ -69,11 +74,8 @@ struct efx_ef10_filter_table {
/* Shadow of net_device address lists, guarded by mac_lock */
#define EFX_EF10_FILTER_DEV_UC_MAX 32
#define EFX_EF10_FILTER_DEV_MC_MAX 256
- struct {
- u8 addr[ETH_ALEN];
- u16 id;
- } dev_uc_list[EFX_EF10_FILTER_DEV_UC_MAX],
- dev_mc_list[EFX_EF10_FILTER_DEV_MC_MAX];
+ struct efx_ef10_dev_addr dev_uc_list[EFX_EF10_FILTER_DEV_UC_MAX];
+ struct efx_ef10_dev_addr dev_mc_list[EFX_EF10_FILTER_DEV_MC_MAX];
int dev_uc_count; /* negative for PROMISC */
int dev_mc_count; /* negative for PROMISC/ALLMULTI */
};
@@ -3746,23 +3748,10 @@ static void efx_ef10_filter_table_remove(struct efx_nic *efx)
kfree(table);
}
-/* Caller must hold efx->filter_sem for read if race against
- * efx_ef10_filter_table_remove() is possible
- */
-static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
+static void efx_ef10_filter_mark_old(struct efx_nic *efx)
{
struct efx_ef10_filter_table *table = efx->filter_state;
- struct net_device *net_dev = efx->net_dev;
- struct efx_filter_spec spec;
- bool remove_failed = false;
- struct netdev_hw_addr *uc;
- struct netdev_hw_addr *mc;
- unsigned int filter_idx;
- int i, rc;
- bool uc_promisc = false, mc_promisc = false;
-
- if (!efx_dev_registered(efx))
- return;
+ unsigned int filter_idx, i;
if (!table)
return;
@@ -3778,29 +3767,40 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD;
}
spin_unlock_bh(&efx->filter_lock);
+}
+
+static void efx_ef10_filter_uc_addr_list(struct efx_nic *efx, bool *promisc)
+{
+ struct efx_ef10_filter_table *table = efx->filter_state;
+ struct net_device *net_dev = efx->net_dev;
+ struct netdev_hw_addr *uc;
+ unsigned int i;
- /* Copy/convert the address lists; add the primary station
- * address and broadcast address
- */
- netif_addr_lock_bh(net_dev);
if (net_dev->flags & IFF_PROMISC ||
netdev_uc_count(net_dev) >= EFX_EF10_FILTER_DEV_UC_MAX) {
- table->dev_uc_count = 0;
- uc_promisc = true;
- } else {
- table->dev_uc_count = 1 + netdev_uc_count(net_dev);
- ether_addr_copy(table->dev_uc_list[0].addr, net_dev->dev_addr);
- i = 1;
- netdev_for_each_uc_addr(uc, net_dev) {
- ether_addr_copy(table->dev_uc_list[i].addr, uc->addr);
- i++;
- }
+ *promisc = true;
}
+ table->dev_uc_count = 1 + netdev_uc_count(net_dev);
+ ether_addr_copy(table->dev_uc_list[0].addr, net_dev->dev_addr);
+ i = 1;
+ netdev_for_each_uc_addr(uc, net_dev) {
+ ether_addr_copy(table->dev_uc_list[i].addr, uc->addr);
+ i++;
+ }
+}
+
+static void efx_ef10_filter_mc_addr_list(struct efx_nic *efx, bool *promisc)
+{
+ struct efx_ef10_filter_table *table = efx->filter_state;
+ struct net_device *net_dev = efx->net_dev;
+ struct netdev_hw_addr *mc;
+ unsigned int i;
+
if (netdev_mc_count(net_dev) + 2 /* room for broadcast and promisc */
- >= EFX_EF10_FILTER_DEV_MC_MAX) {
+ >= EFX_EF10_FILTER_DEV_MC_MAX) {
table->dev_mc_count = 1;
eth_broadcast_addr(table->dev_mc_list[0].addr);
- mc_promisc = true;
+ *promisc = true;
} else {
table->dev_mc_count = 1 + netdev_mc_count(net_dev);
eth_broadcast_addr(table->dev_mc_list[0].addr);
@@ -3809,84 +3809,87 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
ether_addr_copy(table->dev_mc_list[i].addr, mc->addr);
i++;
}
+
if (net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI))
- mc_promisc = true;
+ *promisc = true;
}
- netif_addr_unlock_bh(net_dev);
+}
- /* Insert/renew unicast filters */
- for (i = 0; i < table->dev_uc_count; i++) {
- efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
- EFX_FILTER_FLAG_RX_RSS,
- 0);
- efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
- table->dev_uc_list[i].addr);
- rc = efx_ef10_filter_insert(efx, &spec, true);
- if (rc < 0) {
- /* Fall back to unicast-promisc */
- while (i--)
- efx_ef10_filter_remove_safe(
- efx, EFX_FILTER_PRI_AUTO,
- table->dev_uc_list[i].id);
- table->dev_uc_count = 0;
- uc_promisc = true;
- break;
- }
- table->dev_uc_list[i].id = rc;
- }
- if (uc_promisc) {
- efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
- EFX_FILTER_FLAG_RX_RSS,
- 0);
- efx_filter_set_uc_def(&spec);
- rc = efx_ef10_filter_insert(efx, &spec, true);
- if (rc < 0) {
- WARN_ON(1);
- } else {
- table->dev_uc_list[table->dev_uc_count++].id = rc;
- }
+static void efx_ef10_filter_insert_addr_list(struct efx_nic *efx,
+ bool multicast, bool *promisc)
+{
+ struct efx_ef10_filter_table *table = efx->filter_state;
+ struct efx_ef10_dev_addr *addr_list;
+ struct efx_filter_spec spec;
+ int *addr_count;
+ unsigned int i;
+ int rc;
+
+ if (multicast) {
+ addr_list = table->dev_mc_list;
+ addr_count = &table->dev_mc_count;
+ } else {
+ addr_list = table->dev_uc_list;
+ addr_count = &table->dev_uc_count;
}
- /* Insert/renew multicast filters */
- for (i = 0; i < table->dev_mc_count; i++) {
+ /* Insert/renew filters */
+ for (i = 0; i < *addr_count; i++) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
- table->dev_mc_list[i].addr);
+ addr_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
- /* Fall back to multicast-promisc.
- * Leave the broadcast filter.
+ /* Fall back to promiscuous, but leave the broadcast
+ * filter for multicast
*/
- while (i > 1)
+ while (i--) {
+ if (multicast && i == 1)
+ break;
+
efx_ef10_filter_remove_safe(
efx, EFX_FILTER_PRI_AUTO,
- table->dev_mc_list[--i].id);
- table->dev_mc_count = i;
- mc_promisc = true;
+ addr_list[i].id);
+ }
+ *addr_count = i;
+ *promisc = true;
break;
}
- table->dev_mc_list[i].id = rc;
+ addr_list[i].id = rc;
}
- if (mc_promisc) {
+
+ if (*promisc) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
- efx_filter_set_mc_def(&spec);
+
+ if (multicast)
+ efx_filter_set_mc_def(&spec);
+ else
+ efx_filter_set_uc_def(&spec);
+
rc = efx_ef10_filter_insert(efx, &spec, true);
- if (rc < 0) {
- WARN_ON(1);
- } else {
- table->dev_mc_list[table->dev_mc_count++].id = rc;
- }
+ if (rc < 0)
+ netif_warn(efx, drv, efx->net_dev,
+ "%scast mismatch filter insert failed.",
+ multicast ? "Multi" : "Uni");
+ else
+ addr_list[(*addr_count)++].id = rc;
}
+}
+
+/* Remove filters that weren't renewed. Since nothing else changes the AUTO_OLD
+ * flag or removes these filters, we don't need to hold the filter_lock while
+ * scanning for these filters.
+ */
+static void efx_ef10_filter_remove_old(struct efx_nic *efx)
+{
+ struct efx_ef10_filter_table *table = efx->filter_state;
+ bool remove_failed = false;
+ int i;
- /* Remove filters that weren't renewed. Since nothing else
- * changes the AUTO_OLD flag or removes these filters, we
- * don't need to hold the filter_lock while scanning for
- * these filters.
- */
for (i = 0; i < HUNT_FILTER_TBL_ROWS; i++) {
if (ACCESS_ONCE(table->entry[i].spec) &
EFX_EF10_FILTER_FLAG_AUTO_OLD) {
@@ -3965,6 +3968,38 @@ reset_nic:
return rc ? rc : rc2;
}
+/* Caller must hold efx->filter_sem for read if race against
+ * efx_ef10_filter_table_remove() is possible
+ */
+static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
+{
+ struct efx_ef10_filter_table *table = efx->filter_state;
+ struct net_device *net_dev = efx->net_dev;
+ bool uc_promisc = false, mc_promisc = false;
+
+ if (!efx_dev_registered(efx))
+ return;
+
+ if (!table)
+ return;
+
+ efx_ef10_filter_mark_old(efx);
+
+ /* Copy/convert the address lists; add the primary station
+ * address and broadcast address
+ */
+ netif_addr_lock_bh(net_dev);
+ efx_ef10_filter_uc_addr_list(efx, &uc_promisc);
+ efx_ef10_filter_mc_addr_list(efx, &mc_promisc);
+ netif_addr_unlock_bh(net_dev);
+
+ /* Insert/renew filters */
+ efx_ef10_filter_insert_addr_list(efx, false, &uc_promisc);
+ efx_ef10_filter_insert_addr_list(efx, true, &mc_promisc);
+
+ efx_ef10_filter_remove_old(efx);
+}
+
static int efx_ef10_set_mac_address(struct efx_nic *efx)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_SET_MAC_IN_LEN);
--
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