1 files changed, 206 insertions, 49 deletions

diff --git a/drivers/net/sfc/filter.c b/drivers/net/sfc/filter.c
index 52cb6082b910..d4722c41c4ce 100644
--- a/drivers/net/sfc/filter.c
+++ b/drivers/net/sfc/filter.c
@@ -7,6 +7,7 @@
  * by the Free Software Foundation, incorporated herein by reference.
  */
 
+#include <linux/in.h>
 #include "efx.h"
 #include "filter.h"
 #include "io.h"
@@ -26,19 +27,26 @@
  */
 #define FILTER_CTL_SRCH_MAX 200
 
+enum efx_filter_table_id {
+	EFX_FILTER_TABLE_RX_IP = 0,
+	EFX_FILTER_TABLE_RX_MAC,
+	EFX_FILTER_TABLE_COUNT,
+};
+
 struct efx_filter_table {
+	enum efx_filter_table_id id;
 	u32		offset;		/* address of table relative to BAR */
 	unsigned	size;		/* number of entries */
 	unsigned	step;		/* step between entries */
 	unsigned	used;		/* number currently used */
 	unsigned long	*used_bitmap;
 	struct efx_filter_spec *spec;
+	unsigned	search_depth[EFX_FILTER_TYPE_COUNT];
 };
 
 struct efx_filter_state {
 	spinlock_t	lock;
 	struct efx_filter_table table[EFX_FILTER_TABLE_COUNT];
-	unsigned	search_depth[EFX_FILTER_TYPE_COUNT];
 };
 
 /* The filter hash function is LFSR polynomial x^16 + x^3 + 1 of a 32-bit
@@ -65,68 +73,203 @@ static u16 efx_filter_increment(u32 key)
 }
 
 static enum efx_filter_table_id
-efx_filter_type_table_id(enum efx_filter_type type)
+efx_filter_spec_table_id(const struct efx_filter_spec *spec)
+{
+	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_TCP_FULL >> 2));
+	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_TCP_WILD >> 2));
+	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_UDP_FULL >> 2));
+	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_UDP_WILD >> 2));
+	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_MAC != (EFX_FILTER_MAC_FULL >> 2));
+	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_MAC != (EFX_FILTER_MAC_WILD >> 2));
+	EFX_BUG_ON_PARANOID(spec->type == EFX_FILTER_UNSPEC);
+	return spec->type >> 2;
+}
+
+static struct efx_filter_table *
+efx_filter_spec_table(struct efx_filter_state *state,
+		      const struct efx_filter_spec *spec)
 {
-	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_RX_TCP_FULL >> 2));
-	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_RX_TCP_WILD >> 2));
-	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_RX_UDP_FULL >> 2));
-	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_IP != (EFX_FILTER_RX_UDP_WILD >> 2));
-	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_MAC != (EFX_FILTER_RX_MAC_FULL >> 2));
-	BUILD_BUG_ON(EFX_FILTER_TABLE_RX_MAC != (EFX_FILTER_RX_MAC_WILD >> 2));
-	return type >> 2;
+	if (spec->type == EFX_FILTER_UNSPEC)
+		return NULL;
+	else
+		return &state->table[efx_filter_spec_table_id(spec)];
 }
 
-static void
-efx_filter_table_reset_search_depth(struct efx_filter_state *state,
-				    enum efx_filter_table_id table_id)
+static void efx_filter_table_reset_search_depth(struct efx_filter_table *table)
 {
-	memset(state->search_depth + (table_id << 2), 0,
-	       sizeof(state->search_depth[0]) << 2);
+	memset(table->search_depth, 0, sizeof(table->search_depth));
 }
 
 static void efx_filter_push_rx_limits(struct efx_nic *efx)
 {
 	struct efx_filter_state *state = efx->filter_state;
+	struct efx_filter_table *table;
 	efx_oword_t filter_ctl;
 
 	efx_reado(efx, &filter_ctl, FR_BZ_RX_FILTER_CTL);
 
+	table = &state->table[EFX_FILTER_TABLE_RX_IP];
 	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_TCP_FULL_SRCH_LIMIT,
-			    state->search_depth[EFX_FILTER_RX_TCP_FULL] +
+			    table->search_depth[EFX_FILTER_TCP_FULL] +
 			    FILTER_CTL_SRCH_FUDGE_FULL);
 	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_TCP_WILD_SRCH_LIMIT,
-			    state->search_depth[EFX_FILTER_RX_TCP_WILD] +
+			    table->search_depth[EFX_FILTER_TCP_WILD] +
 			    FILTER_CTL_SRCH_FUDGE_WILD);
 	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_UDP_FULL_SRCH_LIMIT,
-			    state->search_depth[EFX_FILTER_RX_UDP_FULL] +
+			    table->search_depth[EFX_FILTER_UDP_FULL] +
 			    FILTER_CTL_SRCH_FUDGE_FULL);
 	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_UDP_WILD_SRCH_LIMIT,
-			    state->search_depth[EFX_FILTER_RX_UDP_WILD] +
+			    table->search_depth[EFX_FILTER_UDP_WILD] +
 			    FILTER_CTL_SRCH_FUDGE_WILD);
 
-	if (state->table[EFX_FILTER_TABLE_RX_MAC].size) {
+	table = &state->table[EFX_FILTER_TABLE_RX_MAC];
+	if (table->size) {
 		EFX_SET_OWORD_FIELD(
 			filter_ctl, FRF_CZ_ETHERNET_FULL_SEARCH_LIMIT,
-			state->search_depth[EFX_FILTER_RX_MAC_FULL] +
+			table->search_depth[EFX_FILTER_MAC_FULL] +
 			FILTER_CTL_SRCH_FUDGE_FULL);
 		EFX_SET_OWORD_FIELD(
 			filter_ctl, FRF_CZ_ETHERNET_WILDCARD_SEARCH_LIMIT,
-			state->search_depth[EFX_FILTER_RX_MAC_WILD] +
+			table->search_depth[EFX_FILTER_MAC_WILD] +
 			FILTER_CTL_SRCH_FUDGE_WILD);
 	}
 
 	efx_writeo(efx, &filter_ctl, FR_BZ_RX_FILTER_CTL);
 }
 
+static inline void __efx_filter_set_ipv4(struct efx_filter_spec *spec,
+					 __be32 host1, __be16 port1,
+					 __be32 host2, __be16 port2)
+{
+	spec->data[0] = ntohl(host1) << 16 | ntohs(port1);
+	spec->data[1] = ntohs(port2) << 16 | ntohl(host1) >> 16;
+	spec->data[2] = ntohl(host2);
+}
+
+/**
+ * efx_filter_set_ipv4_local - specify IPv4 host, transport protocol and port
+ * @spec: Specification to initialise
+ * @proto: Transport layer protocol number
+ * @host: Local host address (network byte order)
+ * @port: Local port (network byte order)
+ */
+int efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto,
+			      __be32 host, __be16 port)
+{
+	__be32 host1;
+	__be16 port1;
+
+	EFX_BUG_ON_PARANOID(!(spec->flags & EFX_FILTER_FLAG_RX));
+
+	/* This cannot currently be combined with other filtering */
+	if (spec->type != EFX_FILTER_UNSPEC)
+		return -EPROTONOSUPPORT;
+
+	if (port == 0)
+		return -EINVAL;
+
+	switch (proto) {
+	case IPPROTO_TCP:
+		spec->type = EFX_FILTER_TCP_WILD;
+		break;
+	case IPPROTO_UDP:
+		spec->type = EFX_FILTER_UDP_WILD;
+		break;
+	default:
+		return -EPROTONOSUPPORT;
+	}
+
+	/* Filter is constructed in terms of source and destination,
+	 * with the odd wrinkle that the ports are swapped in a UDP
+	 * wildcard filter.  We need to convert from local and remote
+	 * (= zero for wildcard) addresses.
+	 */
+	host1 = 0;
+	if (proto != IPPROTO_UDP) {
+		port1 = 0;
+	} else {
+		port1 = port;
+		port = 0;
+	}
+
+	__efx_filter_set_ipv4(spec, host1, port1, host, port);
+	return 0;
+}
+
+/**
+ * efx_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports
+ * @spec: Specification to initialise
+ * @proto: Transport layer protocol number
+ * @host: Local host address (network byte order)
+ * @port: Local port (network byte order)
+ * @rhost: Remote host address (network byte order)
+ * @rport: Remote port (network byte order)
+ */
+int efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto,
+			     __be32 host, __be16 port,
+			     __be32 rhost, __be16 rport)
+{
+	EFX_BUG_ON_PARANOID(!(spec->flags & EFX_FILTER_FLAG_RX));
+
+	/* This cannot currently be combined with other filtering */
+	if (spec->type != EFX_FILTER_UNSPEC)
+		return -EPROTONOSUPPORT;
+
+	if (port == 0 || rport == 0)
+		return -EINVAL;
+
+	switch (proto) {
+	case IPPROTO_TCP:
+		spec->type = EFX_FILTER_TCP_FULL;
+		break;
+	case IPPROTO_UDP:
+		spec->type = EFX_FILTER_UDP_FULL;
+		break;
+	default:
+		return -EPROTONOSUPPORT;
+	}
+
+	__efx_filter_set_ipv4(spec, rhost, rport, host, port);
+	return 0;
+}
+
+/**
+ * efx_filter_set_eth_local - specify local Ethernet address and optional VID
+ * @spec: Specification to initialise
+ * @vid: VLAN ID to match, or %EFX_FILTER_VID_UNSPEC
+ * @addr: Local Ethernet MAC address
+ */
+int efx_filter_set_eth_local(struct efx_filter_spec *spec,
+			     u16 vid, const u8 *addr)
+{
+	EFX_BUG_ON_PARANOID(!(spec->flags & EFX_FILTER_FLAG_RX));
+
+	/* This cannot currently be combined with other filtering */
+	if (spec->type != EFX_FILTER_UNSPEC)
+		return -EPROTONOSUPPORT;
+
+	if (vid == EFX_FILTER_VID_UNSPEC) {
+		spec->type = EFX_FILTER_MAC_WILD;
+		spec->data[0] = 0;
+	} else {
+		spec->type = EFX_FILTER_MAC_FULL;
+		spec->data[0] = vid;
+	}
+
+	spec->data[1] = addr[2] << 24 | addr[3] << 16 | addr[4] << 8 | addr[5];
+	spec->data[2] = addr[0] << 8 | addr[1];
+	return 0;
+}
+
 /* Build a filter entry and return its n-tuple key. */
 static u32 efx_filter_build(efx_oword_t *filter, struct efx_filter_spec *spec)
 {
 	u32 data3;
 
-	switch (efx_filter_type_table_id(spec->type)) {
+	switch (efx_filter_spec_table_id(spec)) {
 	case EFX_FILTER_TABLE_RX_IP: {
-		bool is_udp = (spec->type == EFX_FILTER_RX_UDP_FULL ||
-			       spec->type == EFX_FILTER_RX_UDP_WILD);
+		bool is_udp = (spec->type == EFX_FILTER_UDP_FULL ||
+			       spec->type == EFX_FILTER_UDP_WILD);
 		EFX_POPULATE_OWORD_7(
 			*filter,
 			FRF_BZ_RSS_EN,
@@ -143,7 +286,7 @@ static u32 efx_filter_build(efx_oword_t *filter, struct efx_filter_spec *spec)
 	}
 
 	case EFX_FILTER_TABLE_RX_MAC: {
-		bool is_wild = spec->type == EFX_FILTER_RX_MAC_WILD;
+		bool is_wild = spec->type == EFX_FILTER_MAC_WILD;
 		EFX_POPULATE_OWORD_8(
 			*filter,
 			FRF_CZ_RMFT_RSS_EN,
@@ -206,6 +349,14 @@ found:
 	return filter_idx;
 }
 
+/* Construct/deconstruct external filter IDs */
+
+static inline int
+efx_filter_make_id(enum efx_filter_table_id table_id, unsigned index)
+{
+	return table_id << 16 | index;
+}
+
 /**
  * efx_filter_insert_filter - add or replace a filter
  * @efx: NIC in which to insert the filter
@@ -213,30 +364,28 @@ found:
  * @replace: Flag for whether the specified filter may replace a filter
  *	with an identical match expression and equal or lower priority
  *
- * On success, return the filter index within its table.
+ * On success, return the filter ID.
  * On failure, return a negative error code.
  */
 int efx_filter_insert_filter(struct efx_nic *efx, struct efx_filter_spec *spec,
 			     bool replace)
 {
 	struct efx_filter_state *state = efx->filter_state;
-	enum efx_filter_table_id table_id =
-		efx_filter_type_table_id(spec->type);
-	struct efx_filter_table *table = &state->table[table_id];
+	struct efx_filter_table *table = efx_filter_spec_table(state, spec);
 	struct efx_filter_spec *saved_spec;
 	efx_oword_t filter;
 	int filter_idx, depth;
 	u32 key;
 	int rc;
 
-	if (table->size == 0)
+	if (!table || table->size == 0)
 		return -EINVAL;
 
 	key = efx_filter_build(&filter, spec);
 
 	netif_vdbg(efx, hw, efx->net_dev,
 		   "%s: type %d search_depth=%d", __func__, spec->type,
-		   state->search_depth[spec->type]);
+		   table->search_depth[spec->type]);
 
 	spin_lock_bh(&state->lock);
 
@@ -263,8 +412,8 @@ int efx_filter_insert_filter(struct efx_nic *efx, struct efx_filter_spec *spec,
 	}
 	*saved_spec = *spec;
 
-	if (state->search_depth[spec->type] < depth) {
-		state->search_depth[spec->type] = depth;
+	if (table->search_depth[spec->type] < depth) {
+		table->search_depth[spec->type] = depth;
 		efx_filter_push_rx_limits(efx);
 	}
 
@@ -273,6 +422,7 @@ int efx_filter_insert_filter(struct efx_nic *efx, struct efx_filter_spec *spec,
 	netif_vdbg(efx, hw, efx->net_dev,
 		   "%s: filter type %d index %d rxq %u set",
 		   __func__, spec->type, filter_idx, spec->dmaq_id);
+	rc = efx_filter_make_id(table->id, filter_idx);
 
 out:
 	spin_unlock_bh(&state->lock);
@@ -306,15 +456,16 @@ static void efx_filter_table_clear_entry(struct efx_nic *efx,
 int efx_filter_remove_filter(struct efx_nic *efx, struct efx_filter_spec *spec)
 {
 	struct efx_filter_state *state = efx->filter_state;
-	enum efx_filter_table_id table_id =
-		efx_filter_type_table_id(spec->type);
-	struct efx_filter_table *table = &state->table[table_id];
+	struct efx_filter_table *table = efx_filter_spec_table(state, spec);
 	struct efx_filter_spec *saved_spec;
 	efx_oword_t filter;
 	int filter_idx, depth;
 	u32 key;
 	int rc;
 
+	if (!table)
+		return -EINVAL;
+
 	key = efx_filter_build(&filter, spec);
 
 	spin_lock_bh(&state->lock);
@@ -332,7 +483,7 @@ int efx_filter_remove_filter(struct efx_nic *efx, struct efx_filter_spec *spec)
 
 	efx_filter_table_clear_entry(efx, table, filter_idx);
 	if (table->used == 0)
-		efx_filter_table_reset_search_depth(state, table_id);
+		efx_filter_table_reset_search_depth(table);
 	rc = 0;
 
 out:
@@ -340,15 +491,9 @@ out:
 	return rc;
 }
 
-/**
- * efx_filter_table_clear - remove filters from a table by priority
- * @efx: NIC from which to remove the filters
- * @table_id: Table from which to remove the filters
- * @priority: Maximum priority to remove
- */
-void efx_filter_table_clear(struct efx_nic *efx,
-			    enum efx_filter_table_id table_id,
-			    enum efx_filter_priority priority)
+static void efx_filter_table_clear(struct efx_nic *efx,
+				   enum efx_filter_table_id table_id,
+				   enum efx_filter_priority priority)
 {
 	struct efx_filter_state *state = efx->filter_state;
 	struct efx_filter_table *table = &state->table[table_id];
@@ -360,11 +505,22 @@ void efx_filter_table_clear(struct efx_nic *efx,
 		if (table->spec[filter_idx].priority <= priority)
 			efx_filter_table_clear_entry(efx, table, filter_idx);
 	if (table->used == 0)
-		efx_filter_table_reset_search_depth(state, table_id);
+		efx_filter_table_reset_search_depth(table);
 
 	spin_unlock_bh(&state->lock);
 }
 
+/**
+ * efx_filter_clear_rx - remove RX filters by priority
+ * @efx: NIC from which to remove the filters
+ * @priority: Maximum priority to remove
+ */
+void efx_filter_clear_rx(struct efx_nic *efx, enum efx_filter_priority priority)
+{
+	efx_filter_table_clear(efx, EFX_FILTER_TABLE_RX_IP, priority);
+	efx_filter_table_clear(efx, EFX_FILTER_TABLE_RX_MAC, priority);
+}
+
 /* Restore filter stater after reset */
 void efx_restore_filters(struct efx_nic *efx)
 {
@@ -407,6 +563,7 @@ int efx_probe_filters(struct efx_nic *efx)
 
 	if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
 		table = &state->table[EFX_FILTER_TABLE_RX_IP];
+		table->id = EFX_FILTER_TABLE_RX_IP;
 		table->offset = FR_BZ_RX_FILTER_TBL0;
 		table->size = FR_BZ_RX_FILTER_TBL0_ROWS;
 		table->step = FR_BZ_RX_FILTER_TBL0_STEP;
@@ -414,6 +571,7 @@ int efx_probe_filters(struct efx_nic *efx)
 
 	if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) {
 		table = &state->table[EFX_FILTER_TABLE_RX_MAC];
+		table->id = EFX_FILTER_TABLE_RX_MAC;
 		table->offset = FR_CZ_RX_MAC_FILTER_TBL0;
 		table->size = FR_CZ_RX_MAC_FILTER_TBL0_ROWS;
 		table->step = FR_CZ_RX_MAC_FILTER_TBL0_STEP;
@@ -428,10 +586,9 @@ int efx_probe_filters(struct efx_nic *efx)
 					     GFP_KERNEL);
 		if (!table->used_bitmap)
 			goto fail;
-		table->spec = vmalloc(table->size * sizeof(*table->spec));
+		table->spec = vzalloc(table->size * sizeof(*table->spec));
 		if (!table->spec)
 			goto fail;
-		memset(table->spec, 0, table->size * sizeof(*table->spec));
 	}
 
 	return 0;