net/cxgbe: add flow ops to match based on dest MAC

Add flow operations to match packets based on destination MAC address.
Allocate and program hardware MPS table with the destination MAC
address to be matched against. The returned MPS index is then used while
offloading flows to LETCAM (maskfull) and HASH (maskless) filter regions.

Also update existing mac_addr_set() to use the new MPS table API.

Signed-off-by: Shagun Agrawal <shaguna@chelsio.com>
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>

doc/guides/rel_notes/release_18_11.rst

@@ -58,6 +58,7 @@ New Features
 
   Flow API support has been enhanced for CXGBE Poll Mode Driver to offload:
 
+  * Match items: destination MAC address.
   * Action items: push/pop/rewrite vlan header.
 
 

drivers/net/cxgbe/base/common.h

@@ -157,6 +157,7 @@ struct tp_params {
 	int port_shift;
 	int protocol_shift;
 	int ethertype_shift;
+	int macmatch_shift;
 
 	u64 hash_filter_mask;
 };

drivers/net/cxgbe/base/t4_hw.c

@@ -5251,6 +5251,8 @@ int t4_init_tp_params(struct adapter *adap)
 							       F_PROTOCOL);
 	adap->params.tp.ethertype_shift = t4_filter_field_shift(adap,
 								F_ETHERTYPE);
+	adap->params.tp.macmatch_shift = t4_filter_field_shift(adap,
+							       F_MACMATCH);
 
 	/*
 	 * If TP_INGRESS_CONFIG.VNID == 0, then TP_VLAN_PRI_MAP.VNIC_ID

drivers/net/cxgbe/cxgbe_ethdev.c

@@ -1075,11 +1075,9 @@ static int cxgbe_get_regs(struct rte_eth_dev *eth_dev,
 int cxgbe_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *addr)
 {
 	struct port_info *pi = (struct port_info *)(dev->data->dev_private);
-	struct adapter *adapter = pi->adapter;
 	int ret;
 
-	ret = t4_change_mac(adapter, adapter->mbox, pi->viid,
-			    pi->xact_addr_filt, (u8 *)addr, true, true);
+	ret = cxgbe_mpstcam_modify(pi, (int)pi->xact_addr_filt, (u8 *)addr);
 	if (ret < 0) {
 		dev_err(adapter, "failed to set mac addr; err = %d\n",
 			ret);

drivers/net/cxgbe/cxgbe_filter.c

@@ -66,7 +66,8 @@ int validate_filter(struct adapter *adapter, struct ch_filter_specification *fs)
 #define U(_mask, _field) \
 	(!(fconf & (_mask)) && S(_field))
 
-	if (U(F_PORT, iport) || U(F_ETHERTYPE, ethtype) || U(F_PROTOCOL, proto))
+	if (U(F_PORT, iport) || U(F_ETHERTYPE, ethtype) ||
+	    U(F_PROTOCOL, proto) || U(F_MACMATCH, macidx))
 		return -EOPNOTSUPP;
 
 #undef S
@@ -268,6 +269,8 @@ static u64 hash_filter_ntuple(const struct filter_entry *f)
 
 	if (tp->ethertype_shift >= 0 && f->fs.mask.ethtype)
 		ntuple |= (u64)(f->fs.val.ethtype) << tp->ethertype_shift;
+	if (tp->macmatch_shift >= 0 && f->fs.mask.macidx)
+		ntuple |= (u64)(f->fs.val.macidx) << tp->macmatch_shift;
 
 	if (ntuple != tp->hash_filter_mask)
 		return 0;
@@ -744,7 +747,9 @@ int set_filter_wr(struct rte_eth_dev *dev, unsigned int fidx)
 			    V_FW_FILTER_WR_RX_RPL_IQ(adapter->sge.fw_evtq.abs_id
 						     ));
 	fwr->maci_to_matchtypem =
-		cpu_to_be32(V_FW_FILTER_WR_PORT(f->fs.val.iport) |
+		cpu_to_be32(V_FW_FILTER_WR_MACI(f->fs.val.macidx) |
+			    V_FW_FILTER_WR_MACIM(f->fs.mask.macidx) |
+			    V_FW_FILTER_WR_PORT(f->fs.val.iport) |
 			    V_FW_FILTER_WR_PORTM(f->fs.mask.iport));
 	fwr->ptcl = f->fs.val.proto;
 	fwr->ptclm = f->fs.mask.proto;

drivers/net/cxgbe/cxgbe_filter.h

@@ -77,6 +77,7 @@ struct ch_filter_tuple {
  * Filter specification
  */
 struct ch_filter_specification {
+	void *private;
 	/* Administrative fields for filter. */
 	uint32_t hitcnts:1;	/* count filter hits in TCB */
 	uint32_t prio:1;	/* filter has priority over active/server */

drivers/net/cxgbe/cxgbe_flow.c

@@ -95,6 +95,8 @@ cxgbe_fill_filter_region(struct adapter *adap,
 		ntuple_mask |= (u64)fs->mask.ethtype << tp->ethertype_shift;
 	if (tp->port_shift >= 0)
 		ntuple_mask |= (u64)fs->mask.iport << tp->port_shift;
+	if (tp->macmatch_shift >= 0)
+		ntuple_mask |= (u64)fs->mask.macidx << tp->macmatch_shift;
 
 	if (ntuple_mask != hash_filter_mask)
 		return;
@@ -102,6 +104,46 @@ cxgbe_fill_filter_region(struct adapter *adap,
 	fs->cap = 1;	/* use hash region */
 }
 
+static int
+ch_rte_parsetype_eth(const void *dmask, const struct rte_flow_item *item,
+		     struct ch_filter_specification *fs,
+		     struct rte_flow_error *e)
+{
+	const struct rte_flow_item_eth *spec = item->spec;
+	const struct rte_flow_item_eth *umask = item->mask;
+	const struct rte_flow_item_eth *mask;
+
+	/* If user has not given any mask, then use chelsio supported mask. */
+	mask = umask ? umask : (const struct rte_flow_item_eth *)dmask;
+
+	/* we don't support SRC_MAC filtering*/
+	if (!is_zero_ether_addr(&mask->src))
+		return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
+					  item,
+					  "src mac filtering not supported");
+
+	if (!is_zero_ether_addr(&mask->dst)) {
+		const u8 *addr = (const u8 *)&spec->dst.addr_bytes[0];
+		const u8 *m = (const u8 *)&mask->dst.addr_bytes[0];
+		struct rte_flow *flow = (struct rte_flow *)fs->private;
+		struct port_info *pi = (struct port_info *)
+					(flow->dev->data->dev_private);
+		int idx;
+
+		idx = cxgbe_mpstcam_alloc(pi, addr, m);
+		if (idx <= 0)
+			return rte_flow_error_set(e, idx,
+						  RTE_FLOW_ERROR_TYPE_ITEM,
+						  NULL, "unable to allocate mac"
+						  " entry in h/w");
+		CXGBE_FILL_FS(idx, 0x1ff, macidx);
+	}
+
+	CXGBE_FILL_FS(be16_to_cpu(spec->type),
+		      be16_to_cpu(mask->type), ethtype);
+	return 0;
+}
+
 static int
 ch_rte_parsetype_port(const void *dmask, const struct rte_flow_item *item,
 		      struct ch_filter_specification *fs,
@@ -440,7 +482,16 @@ cxgbe_rtef_parse_actions(struct rte_flow *flow,
 }
 
 struct chrte_fparse parseitem[] = {
-		[RTE_FLOW_ITEM_TYPE_PHY_PORT] = {
+	[RTE_FLOW_ITEM_TYPE_ETH] = {
+		.fptr  = ch_rte_parsetype_eth,
+		.dmask = &(const struct rte_flow_item_eth){
+			.dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
+			.src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
+			.type = 0xffff,
+		}
+	},
+
+	[RTE_FLOW_ITEM_TYPE_PHY_PORT] = {
 		.fptr = ch_rte_parsetype_port,
 		.dmask = &(const struct rte_flow_item_phy_port){
 			.index = 0x7,
@@ -528,7 +579,6 @@ cxgbe_flow_parse(struct rte_flow *flow,
 		 struct rte_flow_error *e)
 {
 	int ret;
-
 	/* parse user request into ch_filter_specification */
 	ret = cxgbe_rtef_parse_attr(flow, attr, e);
 	if (ret)
@@ -607,6 +657,7 @@ cxgbe_flow_create(struct rte_eth_dev *dev,
 
 	flow->item_parser = parseitem;
 	flow->dev = dev;
+	flow->fs.private = (void *)flow;
 
 	if (cxgbe_flow_parse(flow, attr, item, action, e)) {
 		t4_os_free(flow);
@@ -661,6 +712,17 @@ static int __cxgbe_flow_destroy(struct rte_eth_dev *dev, struct rte_flow *flow)
 		return ctx.result;
 	}
 
+	fs = &flow->fs;
+	if (fs->mask.macidx) {
+		struct port_info *pi = (struct port_info *)
+					(dev->data->dev_private);
+		int ret;
+
+		ret = cxgbe_mpstcam_remove(pi, fs->val.macidx);
+		if (!ret)
+			return ret;
+	}
+
 	return 0;
 }
 

drivers/net/cxgbe/cxgbe_flow.h

@@ -7,6 +7,7 @@
 
 #include <rte_flow_driver.h>
 #include "cxgbe_filter.h"
+#include "mps_tcam.h"
 #include "cxgbe.h"
 
 #define CXGBE_FLOW_POLL_US  10

drivers/net/cxgbe/cxgbe_main.c

@@ -1342,10 +1342,8 @@ int link_start(struct port_info *pi)
 	ret = t4_set_rxmode(adapter, adapter->mbox, pi->viid, mtu, -1, -1,
 			    -1, 1, true);
 	if (ret == 0) {
-		ret = t4_change_mac(adapter, adapter->mbox, pi->viid,
-				    pi->xact_addr_filt,
-				    (u8 *)&pi->eth_dev->data->mac_addrs[0],
-				    true, true);
+		ret = cxgbe_mpstcam_modify(pi, (int)pi->xact_addr_filt,
+				(u8 *)&pi->eth_dev->data->mac_addrs[0]);
 		if (ret >= 0) {
 			pi->xact_addr_filt = ret;
 			ret = 0;