Imported Upstream version 16.07-rc1

Change-Id: I40a523e52f12e8496fdd69e902824b0226c303de
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 339 insertions, 0 deletions

diff --git a/drivers/net/bnxt/bnxt_txr.c b/drivers/net/bnxt/bnxt_txr.c
new file mode 100644
index 00000000..8bf8fee3
--- /dev/null
+++ b/drivers/net/bnxt/bnxt_txr.c
@@ -0,0 +1,339 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) Broadcom Limited.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Broadcom Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <inttypes.h>
+
+#include <rte_byteorder.h>
+#include <rte_malloc.h>
+
+#include "bnxt.h"
+#include "bnxt_cpr.h"
+#include "bnxt_ring.h"
+#include "bnxt_txq.h"
+#include "bnxt_txr.h"
+#include "hsi_struct_def_dpdk.h"
+#include <stdbool.h>
+
+/*
+ * TX Ring handling
+ */
+
+void bnxt_free_tx_rings(struct bnxt *bp)
+{
+	int i;
+
+	for (i = 0; i < (int)bp->tx_nr_rings; i++) {
+		struct bnxt_tx_queue *txq = bp->tx_queues[i];
+
+		if (!txq)
+			continue;
+
+		bnxt_free_ring(txq->tx_ring->tx_ring_struct);
+		rte_free(txq->tx_ring->tx_ring_struct);
+		rte_free(txq->tx_ring);
+
+		bnxt_free_ring(txq->cp_ring->cp_ring_struct);
+		rte_free(txq->cp_ring->cp_ring_struct);
+		rte_free(txq->cp_ring);
+
+		rte_free(txq);
+		bp->tx_queues[i] = NULL;
+	}
+}
+
+int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
+{
+	struct bnxt_tx_ring_info *txr = txq->tx_ring;
+	struct bnxt_ring *ring = txr->tx_ring_struct;
+
+	txq->tx_wake_thresh = ring->ring_size / 2;
+	ring->fw_ring_id = INVALID_HW_RING_ID;
+
+	return 0;
+}
+
+int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
+{
+	struct bnxt_cp_ring_info *cpr;
+	struct bnxt_tx_ring_info *txr;
+	struct bnxt_ring *ring;
+
+	txr = rte_zmalloc_socket("bnxt_tx_ring",
+				 sizeof(struct bnxt_tx_ring_info),
+				 RTE_CACHE_LINE_SIZE, socket_id);
+	if (txr == NULL)
+		return -ENOMEM;
+	txq->tx_ring = txr;
+
+	ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
+				  sizeof(struct bnxt_ring),
+				  RTE_CACHE_LINE_SIZE, socket_id);
+	if (ring == NULL)
+		return -ENOMEM;
+	txr->tx_ring_struct = ring;
+	ring->ring_size = rte_align32pow2(txq->nb_tx_desc + 1);
+	ring->ring_mask = ring->ring_size - 1;
+	ring->bd = (void *)txr->tx_desc_ring;
+	ring->bd_dma = txr->tx_desc_mapping;
+	ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
+	ring->vmem = (void **)&txr->tx_buf_ring;
+
+	cpr = rte_zmalloc_socket("bnxt_tx_ring",
+				 sizeof(struct bnxt_cp_ring_info),
+				 RTE_CACHE_LINE_SIZE, socket_id);
+	if (cpr == NULL)
+		return -ENOMEM;
+	txq->cp_ring = cpr;
+
+	ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
+				  sizeof(struct bnxt_ring),
+				  RTE_CACHE_LINE_SIZE, socket_id);
+	if (ring == NULL)
+		return -ENOMEM;
+	cpr->cp_ring_struct = ring;
+	ring->ring_size = txr->tx_ring_struct->ring_size;
+	ring->ring_mask = ring->ring_size - 1;
+	ring->bd = (void *)cpr->cp_desc_ring;
+	ring->bd_dma = cpr->cp_desc_mapping;
+	ring->vmem_size = 0;
+	ring->vmem = NULL;
+
+	return 0;
+}
+
+static inline uint32_t bnxt_tx_avail(struct bnxt_tx_ring_info *txr)
+{
+	/* Tell compiler to fetch tx indices from memory. */
+	rte_compiler_barrier();
+
+	return txr->tx_ring_struct->ring_size -
+		((txr->tx_prod - txr->tx_cons) &
+			txr->tx_ring_struct->ring_mask) - 1;
+}
+
+static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
+				struct bnxt_tx_queue *txq)
+{
+	struct bnxt_tx_ring_info *txr = txq->tx_ring;
+	struct tx_bd_long *txbd;
+	struct tx_bd_long_hi *txbd1;
+	uint32_t vlan_tag_flags, cfa_action;
+	bool long_bd = false;
+	uint16_t last_prod = 0;
+	struct rte_mbuf *m_seg;
+	struct bnxt_sw_tx_bd *tx_buf;
+	static const uint32_t lhint_arr[4] = {
+		TX_BD_LONG_FLAGS_LHINT_LT512,
+		TX_BD_LONG_FLAGS_LHINT_LT1K,
+		TX_BD_LONG_FLAGS_LHINT_LT2K,
+		TX_BD_LONG_FLAGS_LHINT_LT2K
+	};
+
+	if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
+				PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
+				PKT_TX_VLAN_PKT))
+		long_bd = true;
+
+	tx_buf = &txr->tx_buf_ring[txr->tx_prod];
+	tx_buf->mbuf = tx_pkt;
+	tx_buf->nr_bds = long_bd + tx_pkt->nb_segs;
+	last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) &
+				txr->tx_ring_struct->ring_mask;
+
+	if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds))
+		return -ENOMEM;
+
+	txbd = &txr->tx_desc_ring[txr->tx_prod];
+	txbd->opaque = txr->tx_prod;
+	txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
+	txbd->len = tx_pkt->data_len;
+	if (txbd->len >= 2014)
+		txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
+	else
+		txbd->flags_type |= lhint_arr[txbd->len >> 9];
+	txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(tx_buf->mbuf));
+
+	if (long_bd) {
+		txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
+		vlan_tag_flags = 0;
+		cfa_action = 0;
+		if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+			/* shurd: Should this mask at
+			 * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
+			 */
+			vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
+				tx_buf->mbuf->vlan_tci;
+			/* Currently supports 8021Q, 8021AD vlan offloads
+			 * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
+			 */
+			/* DPDK only supports 802.11q VLAN packets */
+			vlan_tag_flags |=
+					TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
+		}
+
+		txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
+
+		txbd1 = (struct tx_bd_long_hi *)
+					&txr->tx_desc_ring[txr->tx_prod];
+		txbd1->lflags = 0;
+		txbd1->cfa_meta = vlan_tag_flags;
+		txbd1->cfa_action = cfa_action;
+
+		if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
+			/* TSO */
+			txbd1->lflags = TX_BD_LONG_LFLAGS_LSO;
+			txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
+					tx_pkt->l4_len;
+			txbd1->mss = tx_pkt->tso_segsz;
+
+		} else if (tx_pkt->ol_flags & (PKT_TX_TCP_CKSUM |
+					PKT_TX_UDP_CKSUM)) {
+			/* TCP/UDP CSO */
+			txbd1->lflags = TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
+			txbd1->mss = 0;
+
+		} else if (tx_pkt->ol_flags & PKT_TX_IP_CKSUM) {
+			/* IP CSO */
+			txbd1->lflags = TX_BD_LONG_LFLAGS_IP_CHKSUM;
+			txbd1->mss = 0;
+		}
+	} else {
+		txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
+	}
+
+	m_seg = tx_pkt->next;
+	/* i is set at the end of the if(long_bd) block */
+	while (txr->tx_prod != last_prod) {
+		txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
+		tx_buf = &txr->tx_buf_ring[txr->tx_prod];
+
+		txbd = &txr->tx_desc_ring[txr->tx_prod];
+		txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(m_seg));
+		txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
+		txbd->len = m_seg->data_len;
+
+		m_seg = m_seg->next;
+	}
+
+	txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
+
+	txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
+
+	return 0;
+}
+
+static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
+{
+	struct bnxt_tx_ring_info *txr = txq->tx_ring;
+	uint16_t cons = txr->tx_cons;
+	int i, j;
+
+	for (i = 0; i < nr_pkts; i++) {
+		struct bnxt_sw_tx_bd *tx_buf;
+		struct rte_mbuf *mbuf;
+
+		tx_buf = &txr->tx_buf_ring[cons];
+		cons = RING_NEXT(txr->tx_ring_struct, cons);
+		mbuf = tx_buf->mbuf;
+		tx_buf->mbuf = NULL;
+
+		/* EW - no need to unmap DMA memory? */
+
+		for (j = 1; j < tx_buf->nr_bds; j++)
+			cons = RING_NEXT(txr->tx_ring_struct, cons);
+		rte_pktmbuf_free(mbuf);
+	}
+
+	txr->tx_cons = cons;
+}
+
+static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
+{
+	struct bnxt_cp_ring_info *cpr = txq->cp_ring;
+	uint32_t raw_cons = cpr->cp_raw_cons;
+	uint32_t cons;
+	int nb_tx_pkts = 0;
+	struct tx_cmpl *txcmp;
+
+	if ((txq->tx_ring->tx_ring_struct->ring_size -
+			(bnxt_tx_avail(txq->tx_ring))) >
+			txq->tx_free_thresh) {
+		while (1) {
+			cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
+			txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
+
+			if (!CMP_VALID(txcmp, raw_cons, cpr->cp_ring_struct))
+				break;
+
+			if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
+				nb_tx_pkts++;
+			else
+				RTE_LOG(DEBUG, PMD,
+						"Unhandled CMP type %02x\n",
+						CMP_TYPE(txcmp));
+			raw_cons = NEXT_RAW_CMP(raw_cons);
+		}
+		if (nb_tx_pkts)
+			bnxt_tx_cmp(txq, nb_tx_pkts);
+		cpr->cp_raw_cons = raw_cons;
+		B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
+	}
+	return nb_tx_pkts;
+}
+
+uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
+			       uint16_t nb_pkts)
+{
+	struct bnxt_tx_queue *txq = tx_queue;
+	uint16_t nb_tx_pkts = 0;
+	uint16_t db_mask = txq->tx_ring->tx_ring_struct->ring_size >> 2;
+	uint16_t last_db_mask = 0;
+
+	/* Handle TX completions */
+	bnxt_handle_tx_cp(txq);
+
+	/* Handle TX burst request */
+	for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
+		if (bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq)) {
+			break;
+		} else if ((nb_tx_pkts & db_mask) != last_db_mask) {
+			B_TX_DB(txq->tx_ring->tx_doorbell,
+					txq->tx_ring->tx_prod);
+			last_db_mask = nb_tx_pkts & db_mask;
+		}
+	}
+	if (nb_tx_pkts)
+		B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);
+
+	return nb_tx_pkts;
+}