1 files changed, 230 insertions, 0 deletions
diff --git a/src/spdk/dpdk/drivers/net/cxgbe/smt.c b/src/spdk/dpdk/drivers/net/cxgbe/smt.c
new file mode 100644
index 000000000..e8f38676e
--- /dev/null
+++ b/src/spdk/dpdk/drivers/net/cxgbe/smt.c
@@ -0,0 +1,230 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2020 Chelsio Communications.
+ * All rights reserved.
+ */
+
+#include "base/common.h"
+#include "smt.h"
+
+void cxgbe_do_smt_write_rpl(struct adapter *adap,
+			    const struct cpl_smt_write_rpl *rpl)
+{
+	unsigned int smtidx = G_TID_TID(GET_TID(rpl));
+	struct smt_data *s = adap->smt;
+
+	if (unlikely(rpl->status != CPL_ERR_NONE)) {
+		struct smt_entry *e = &s->smtab[smtidx];
+
+		dev_err(adap,
+			"Unexpected SMT_WRITE_RPL status %u for entry %u\n",
+			rpl->status, smtidx);
+		t4_os_lock(&e->lock);
+		e->state = SMT_STATE_ERROR;
+		t4_os_unlock(&e->lock);
+	}
+}
+
+static int write_smt_entry(struct rte_eth_dev *dev, struct smt_entry *e)
+{
+	unsigned int port_id = ethdev2pinfo(dev)->port_id;
+	struct adapter *adap = ethdev2adap(dev);
+	struct cpl_t6_smt_write_req *t6req;
+	struct smt_data *s = adap->smt;
+	struct cpl_smt_write_req *req;
+	struct sge_ctrl_txq *ctrlq;
+	struct rte_mbuf *mbuf;
+	u8 row;
+
+	ctrlq = &adap->sge.ctrlq[port_id];
+	mbuf = rte_pktmbuf_alloc(ctrlq->mb_pool);
+	if (!mbuf)
+		return -ENOMEM;
+
+	if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5) {
+		mbuf->data_len = sizeof(*req);
+		mbuf->pkt_len = mbuf->data_len;
+
+		/* Source MAC Table (SMT) contains 256 SMAC entries
+		 * organized in 128 rows of 2 entries each.
+		 */
+		req = rte_pktmbuf_mtod(mbuf, struct cpl_smt_write_req *);
+		INIT_TP_WR(req, 0);
+
+		/* Each row contains an SMAC pair.
+		 * LSB selects the SMAC entry within a row
+		 */
+		if (e->idx & 1) {
+			req->pfvf1 = 0x0;
+			rte_memcpy(req->src_mac1, e->src_mac,
+				   RTE_ETHER_ADDR_LEN);
+
+			/* fill pfvf0/src_mac0 with entry
+			 * at prev index from smt-tab.
+			 */
+			req->pfvf0 = 0x0;
+			rte_memcpy(req->src_mac0, s->smtab[e->idx - 1].src_mac,
+				   RTE_ETHER_ADDR_LEN);
+		} else {
+			req->pfvf0 = 0x0;
+			rte_memcpy(req->src_mac0, e->src_mac,
+				   RTE_ETHER_ADDR_LEN);
+
+			/* fill pfvf1/src_mac1 with entry
+			 * at next index from smt-tab
+			 */
+			req->pfvf1 = 0x0;
+			rte_memcpy(req->src_mac1, s->smtab[e->idx + 1].src_mac,
+				   RTE_ETHER_ADDR_LEN);
+		}
+		row = (e->hw_idx >> 1);
+	} else {
+		mbuf->data_len = sizeof(*t6req);
+		mbuf->pkt_len = mbuf->data_len;
+
+		/* Source MAC Table (SMT) contains 256 SMAC entries */
+		t6req = rte_pktmbuf_mtod(mbuf, struct cpl_t6_smt_write_req *);
+		INIT_TP_WR(t6req, 0);
+
+		/* fill pfvf0/src_mac0 from smt-tab */
+		t6req->pfvf0 = 0x0;
+		rte_memcpy(t6req->src_mac0, s->smtab[e->idx].src_mac,
+			   RTE_ETHER_ADDR_LEN);
+		row = e->hw_idx;
+		req = (struct cpl_smt_write_req *)t6req;
+	}
+
+	OPCODE_TID(req) =
+		cpu_to_be32(MK_OPCODE_TID(CPL_SMT_WRITE_REQ,
+					  e->hw_idx |
+					  V_TID_QID(adap->sge.fw_evtq.abs_id)));
+
+	req->params = cpu_to_be32(V_SMTW_NORPL(0) |
+				  V_SMTW_IDX(row) |
+				  V_SMTW_OVLAN_IDX(0));
+	t4_mgmt_tx(ctrlq, mbuf);
+
+	return 0;
+}
+
+/**
+ * find_or_alloc_smte - Find/Allocate a free SMT entry
+ * @s: SMT table
+ * @smac: Source MAC address to compare/add
+ * Returns pointer to the SMT entry found/created
+ *
+ * Finds/Allocates an SMT entry to be used by switching rule of a filter.
+ */
+static struct smt_entry *find_or_alloc_smte(struct smt_data *s, u8 *smac)
+{
+	struct smt_entry *e, *end, *first_free = NULL;
+
+	for (e = &s->smtab[0], end = &s->smtab[s->smt_size]; e != end; ++e) {
+		if (!rte_atomic32_read(&e->refcnt)) {
+			if (!first_free)
+				first_free = e;
+		} else {
+			if (e->state == SMT_STATE_SWITCHING) {
+				/* This entry is actually in use. See if we can
+				 * re-use it ?
+				 */
+				if (!memcmp(e->src_mac, smac,
+					    RTE_ETHER_ADDR_LEN))
+					goto found;
+			}
+		}
+	}
+
+	if (!first_free)
+		return NULL;
+
+	e = first_free;
+	e->state = SMT_STATE_UNUSED;
+
+found:
+	return e;
+}
+
+static struct smt_entry *t4_smt_alloc_switching(struct rte_eth_dev *dev,
+						u16 pfvf, u8 *smac)
+{
+	struct adapter *adap = ethdev2adap(dev);
+	struct smt_data *s = adap->smt;
+	struct smt_entry *e;
+	int ret;
+
+	t4_os_write_lock(&s->lock);
+	e = find_or_alloc_smte(s, smac);
+	if (e) {
+		t4_os_lock(&e->lock);
+		if (!rte_atomic32_read(&e->refcnt)) {
+			e->pfvf = pfvf;
+			rte_memcpy(e->src_mac, smac, RTE_ETHER_ADDR_LEN);
+			ret = write_smt_entry(dev, e);
+			if (ret) {
+				e->pfvf = 0;
+				memset(e->src_mac, 0, RTE_ETHER_ADDR_LEN);
+				t4_os_unlock(&e->lock);
+				e = NULL;
+				goto out_write_unlock;
+			}
+			e->state = SMT_STATE_SWITCHING;
+			rte_atomic32_set(&e->refcnt, 1);
+		} else {
+			rte_atomic32_inc(&e->refcnt);
+		}
+		t4_os_unlock(&e->lock);
+	}
+
+out_write_unlock:
+	t4_os_write_unlock(&s->lock);
+	return e;
+}
+
+/**
+ * cxgbe_smt_alloc_switching - Allocate an SMT entry for switching rule
+ * @dev: rte_eth_dev pointer
+ * @smac: MAC address to add to SMT
+ * Returns pointer to the SMT entry created
+ *
+ * Allocates an SMT entry to be used by switching rule of a filter.
+ */
+struct smt_entry *cxgbe_smt_alloc_switching(struct rte_eth_dev *dev, u8 *smac)
+{
+	return t4_smt_alloc_switching(dev, 0x0, smac);
+}
+
+/**
+ * Initialize Source MAC Table
+ */
+struct smt_data *t4_init_smt(u32 smt_start_idx, u32 smt_size)
+{
+	struct smt_data *s;
+	u32 i;
+
+	s = t4_alloc_mem(sizeof(*s) + smt_size * sizeof(struct smt_entry));
+	if (!s)
+		return NULL;
+
+	s->smt_start = smt_start_idx;
+	s->smt_size = smt_size;
+	t4_os_rwlock_init(&s->lock);
+
+	for (i = 0; i < s->smt_size; ++i) {
+		s->smtab[i].idx = i;
+		s->smtab[i].hw_idx = smt_start_idx + i;
+		s->smtab[i].state = SMT_STATE_UNUSED;
+		memset(&s->smtab[i].src_mac, 0, RTE_ETHER_ADDR_LEN);
+		t4_os_lock_init(&s->smtab[i].lock);
+		rte_atomic32_set(&s->smtab[i].refcnt, 0);
+	}
+	return s;
+}
+
+/**
+ * Cleanup Source MAC Table
+ */
+void t4_cleanup_smt(struct adapter *adap)
+{
+	if (adap->smt)
+		t4_os_free(adap->smt);
+}