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Commit 12fb0da4 authored by Edward Cree's avatar Edward Cree Committed by David S. Miller
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sfc: clean fallbacks between promisc/normal in efx_ef10_filter_sync_rx_mode 

Separate functions for inserting individual and promisc filters; explicit
 fallback logic in efx_ef10_filter_sync_rx_mode(), in order not to overload
 the 'promisc' flag as also meaning "fall back to promisc".
Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ab8b1f7c
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Showing with 208 additions and 80 deletions
drivers/net/ethernet/sfc/ef10.c
View file @ 12fb0da4
......@@ -49,6 +49,7 @@ enum {
*/
#define HUNT_FILTER_TBL_ROWS 8192
#define EFX_EF10_FILTER_ID_INVALID 0xffff
struct efx_ef10_dev_addr {
u8 addr[ETH_ALEN];
u16 id;
......@@ -76,8 +77,12 @@ struct efx_ef10_filter_table {
#define EFX_EF10_FILTER_DEV_MC_MAX 256
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 */
int dev_uc_count;
int dev_mc_count;
/* Indices (like efx_ef10_dev_addr.id) for promisc/allmulti filters */
u16 ucdef_id;
u16 bcast_id;
u16 mcdef_id;
};
/* An arbitrary search limit for the software hash table */
......@@ -3273,6 +3278,19 @@ static int efx_ef10_filter_remove_safe(struct efx_nic *efx,
filter_id, false);
}
static u32 efx_ef10_filter_get_unsafe_id(struct efx_nic *efx, u32 filter_id)
{
return filter_id % HUNT_FILTER_TBL_ROWS;
}
static int efx_ef10_filter_remove_unsafe(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 filter_id)
{
return efx_ef10_filter_remove_internal(efx, 1U << priority,
filter_id, true);
}
static int efx_ef10_filter_get_safe(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 filter_id, struct efx_filter_spec *spec)
......@@ -3646,6 +3664,10 @@ static int efx_ef10_filter_table_probe(struct efx_nic *efx)
goto fail;
}
table->ucdef_id = EFX_EF10_FILTER_ID_INVALID;
table->bcast_id = EFX_EF10_FILTER_ID_INVALID;
table->mcdef_id = EFX_EF10_FILTER_ID_INVALID;
efx->filter_state = table;
init_waitqueue_head(&table->waitq);
return 0;
......@@ -3748,6 +3770,12 @@ static void efx_ef10_filter_table_remove(struct efx_nic *efx)
kfree(table);
}
#define EFX_EF10_FILTER_DO_MARK_OLD(id) \
if (id != EFX_EF10_FILTER_ID_INVALID) { \
filter_idx = efx_ef10_filter_get_unsafe_id(efx, id); \
WARN_ON(!table->entry[filter_idx].spec); \
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD; \
}
static void efx_ef10_filter_mark_old(struct efx_nic *efx)
{
struct efx_ef10_filter_table *table = efx->filter_state;
......@@ -3758,33 +3786,39 @@ static void efx_ef10_filter_mark_old(struct efx_nic *efx)
/* Mark old filters that may need to be removed */
spin_lock_bh(&efx->filter_lock);
for (i = 0; i < table->dev_uc_count; i++) {
filter_idx = table->dev_uc_list[i].id % HUNT_FILTER_TBL_ROWS;
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD;
}
for (i = 0; i < table->dev_mc_count; i++) {
filter_idx = table->dev_mc_list[i].id % HUNT_FILTER_TBL_ROWS;
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD;
}
for (i = 0; i < table->dev_uc_count; i++)
EFX_EF10_FILTER_DO_MARK_OLD(table->dev_uc_list[i].id);
for (i = 0; i < table->dev_mc_count; i++)
EFX_EF10_FILTER_DO_MARK_OLD(table->dev_mc_list[i].id);
EFX_EF10_FILTER_DO_MARK_OLD(table->ucdef_id);
EFX_EF10_FILTER_DO_MARK_OLD(table->bcast_id);
EFX_EF10_FILTER_DO_MARK_OLD(table->mcdef_id);
spin_unlock_bh(&efx->filter_lock);
}
#undef EFX_EF10_FILTER_DO_MARK_OLD
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;
int addr_count;
unsigned int i;
if (net_dev->flags & IFF_PROMISC ||
netdev_uc_count(net_dev) >= EFX_EF10_FILTER_DEV_UC_MAX) {
table->ucdef_id = EFX_EF10_FILTER_ID_INVALID;
addr_count = netdev_uc_count(net_dev);
if (net_dev->flags & IFF_PROMISC)
*promisc = true;
}
table->dev_uc_count = 1 + netdev_uc_count(net_dev);
table->dev_uc_count = 1 + addr_count;
ether_addr_copy(table->dev_uc_list[0].addr, net_dev->dev_addr);
i = 1;
netdev_for_each_uc_addr(uc, net_dev) {
if (i >= EFX_EF10_FILTER_DEV_UC_MAX) {
*promisc = true;
break;
}
ether_addr_copy(table->dev_uc_list[i].addr, uc->addr);
table->dev_uc_list[i].id = EFX_EF10_FILTER_ID_INVALID;
i++;
}
}
......@@ -3792,65 +3826,51 @@ static void efx_ef10_filter_uc_addr_list(struct efx_nic *efx, bool *promisc)
static void efx_ef10_filter_mc_addr_list(struct efx_nic *efx, bool *promisc)
{
struct efx_ef10_filter_table *table = efx->filter_state;
struct efx_ef10_nic_data *nic_data = efx->nic_data;
struct net_device *net_dev = efx->net_dev;
struct netdev_hw_addr *mc;
unsigned int i, addr_count;
table->mcdef_id = EFX_EF10_FILTER_ID_INVALID;
table->bcast_id = EFX_EF10_FILTER_ID_INVALID;
if (net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI))
*promisc = true;
if (nic_data->workaround_26807) {
if (*promisc) {
table->dev_mc_count = 0;
return;
}
addr_count = netdev_mc_count(net_dev);
} else {
/* Allow room for broadcast and promiscuous */
addr_count = netdev_mc_count(net_dev) + 2;
}
if (addr_count >= EFX_EF10_FILTER_DEV_MC_MAX) {
if (nic_data->workaround_26807) {
table->dev_mc_count = 0;
} else {
table->dev_mc_count = 1;
eth_broadcast_addr(table->dev_mc_list[0].addr);
}
*promisc = true;
return;
}
table->dev_mc_count = 1 + netdev_mc_count(net_dev);
eth_broadcast_addr(table->dev_mc_list[0].addr);
i = 1;
addr_count = netdev_mc_count(net_dev);
i = 0;
netdev_for_each_mc_addr(mc, net_dev) {
if (i >= EFX_EF10_FILTER_DEV_MC_MAX) {
*promisc = true;
break;
}
ether_addr_copy(table->dev_mc_list[i].addr, mc->addr);
table->dev_mc_list[i].id = EFX_EF10_FILTER_ID_INVALID;
i++;
}
table->dev_mc_count = i;
}
static void efx_ef10_filter_insert_addr_list(struct efx_nic *efx,
bool multicast, bool *promisc)
static int efx_ef10_filter_insert_addr_list(struct efx_nic *efx,
bool multicast, bool rollback)
{
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;
u8 baddr[ETH_ALEN];
unsigned int i, j;
int addr_count;
int rc;
if (multicast) {
addr_list = table->dev_mc_list;
addr_count = &table->dev_mc_count;
addr_count = table->dev_mc_count;
} else {
addr_list = table->dev_uc_list;
addr_count = &table->dev_uc_count;
addr_count = table->dev_uc_count;
}
/* Insert/renew filters */
for (i = 0; i < *addr_count; i++) {
for (i = 0; i < addr_count; i++) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
......@@ -3858,46 +3878,113 @@ static void efx_ef10_filter_insert_addr_list(struct efx_nic *efx,
addr_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
/* Fall back to promiscuous, but leave the broadcast
* filter for multicast
*/
while (i--) {
struct efx_ef10_nic_data *nic_data =
efx->nic_data;
if (multicast && i == 1 &&
!nic_data->workaround_26807)
break;
efx_ef10_filter_remove_safe(
efx, EFX_FILTER_PRI_AUTO,
addr_list[i].id);
if (rollback) {
netif_info(efx, drv, efx->net_dev,
"efx_ef10_filter_insert failed rc=%d\n",
rc);
/* Fall back to promiscuous */
for (j = 0; j < i; j++) {
if (addr_list[j].id == EFX_EF10_FILTER_ID_INVALID)
continue;
efx_ef10_filter_remove_unsafe(
efx, EFX_FILTER_PRI_AUTO,
addr_list[j].id);
addr_list[j].id = EFX_EF10_FILTER_ID_INVALID;
}
return rc;
} else {
/* mark as not inserted, and carry on */
rc = EFX_EF10_FILTER_ID_INVALID;
}
*addr_count = i;
*promisc = true;
break;
}
addr_list[i].id = rc;
addr_list[i].id = efx_ef10_filter_get_unsafe_id(efx, rc);
}
if (*promisc) {
if (multicast && rollback) {
/* Also need an Ethernet broadcast filter */
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
if (multicast)
efx_filter_set_mc_def(&spec);
else
efx_filter_set_uc_def(&spec);
eth_broadcast_addr(baddr);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC, baddr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0)
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;
"Broadcast filter insert failed rc=%d\n", rc);
/* Fall back to promiscuous */
for (j = 0; j < i; j++) {
if (addr_list[j].id == EFX_EF10_FILTER_ID_INVALID)
continue;
efx_ef10_filter_remove_unsafe(
efx, EFX_FILTER_PRI_AUTO,
addr_list[j].id);
addr_list[j].id = EFX_EF10_FILTER_ID_INVALID;
}
return rc;
} else {
table->bcast_id = efx_ef10_filter_get_unsafe_id(efx, rc);
}
}
return 0;
}
static int efx_ef10_filter_insert_def(struct efx_nic *efx, bool multicast,
bool rollback)
{
struct efx_ef10_filter_table *table = efx->filter_state;
struct efx_ef10_nic_data *nic_data = efx->nic_data;
struct efx_filter_spec spec;
u8 baddr[ETH_ALEN];
int rc;
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
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) {
netif_warn(efx, drv, efx->net_dev,
"%scast mismatch filter insert failed rc=%d\n",
multicast ? "Multi" : "Uni", rc);
} else if (multicast) {
table->mcdef_id = efx_ef10_filter_get_unsafe_id(efx, rc);
if (!nic_data->workaround_26807) {
/* Also need an Ethernet broadcast filter */
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
eth_broadcast_addr(baddr);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
baddr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
netif_warn(efx, drv, efx->net_dev,
"Broadcast filter insert failed rc=%d\n",
rc);
if (rollback) {
/* Roll back the mc_def filter */
efx_ef10_filter_remove_unsafe(
efx, EFX_FILTER_PRI_AUTO,
table->mcdef_id);
table->mcdef_id = EFX_EF10_FILTER_ID_INVALID;
return rc;
}
} else {
table->bcast_id = efx_ef10_filter_get_unsafe_id(efx, rc);
}
}
rc = 0;
} else {
table->ucdef_id = rc;
rc = 0;
}
return rc;
}
/* Remove filters that weren't renewed. Since nothing else changes the AUTO_OLD
......@@ -4014,15 +4101,56 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
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);
/* Insert/renew unicast filters */
if (uc_promisc) {
efx_ef10_filter_insert_def(efx, false, false);
efx_ef10_filter_insert_addr_list(efx, false, false);
} else {
/* If any of the filters failed to insert, fall back to
* promiscuous mode - add in the uc_def filter. But keep
* our individual unicast filters.
*/
if (efx_ef10_filter_insert_addr_list(efx, false, false))
efx_ef10_filter_insert_def(efx, false, false);
}
/* Insert/renew multicast filters */
/* If changing promiscuous state with cascaded multicast filters, remove
* old filters first, so that packets are dropped rather than duplicated
*/
if (nic_data->workaround_26807 && efx->mc_promisc != mc_promisc)
efx_ef10_filter_remove_old(efx);
efx_ef10_filter_insert_addr_list(efx, true, &mc_promisc);
if (mc_promisc) {
if (nic_data->workaround_26807) {
/* If we failed to insert promiscuous filters, rollback
* and fall back to individual multicast filters
*/
if (efx_ef10_filter_insert_def(efx, true, true)) {
/* Changing promisc state, so remove old filters */
efx_ef10_filter_remove_old(efx);
efx_ef10_filter_insert_addr_list(efx, true, false);
}
} else {
/* If we failed to insert promiscuous filters, don't
* rollback. Regardless, also insert the mc_list
*/
efx_ef10_filter_insert_def(efx, true, false);
efx_ef10_filter_insert_addr_list(efx, true, false);
}
} else {
/* If any filters failed to insert, rollback and fall back to
* promiscuous mode - mc_def filter and maybe broadcast. If
* that fails, roll back again and insert as many of our
* individual multicast filters as we can.
*/
if (efx_ef10_filter_insert_addr_list(efx, true, true)) {
/* Changing promisc state, so remove old filters */
if (nic_data->workaround_26807)
efx_ef10_filter_remove_old(efx);
if (efx_ef10_filter_insert_def(efx, true, true))
efx_ef10_filter_insert_addr_list(efx, true, false);
}
}
efx_ef10_filter_remove_old(efx);
efx->mc_promisc = mc_promisc;
......
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