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/*-
 *   BSD LICENSE
 *
 *   Copyright (c) 2016 Freescale Semiconductor, Inc. All rights reserved.
 *   Copyright (c) 2016 NXP. 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 Freescale Semiconductor, Inc 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 <time.h>
#include <net/if.h>

#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_memcpy.h>
#include <rte_string_fns.h>
#include <rte_dev.h>
#include <rte_ethdev.h>

#include <fslmc_logs.h>
#include <fslmc_vfio.h>
#include <dpaa2_hw_pvt.h>
#include <dpaa2_hw_dpio.h>
#include <dpaa2_hw_mempool.h>

#include "dpaa2_ethdev.h"
#include "base/dpaa2_hw_dpni_annot.h"

static inline uint32_t __attribute__((hot))
dpaa2_dev_rx_parse(uint64_t hw_annot_addr)
{
	uint32_t pkt_type = RTE_PTYPE_UNKNOWN;
	struct dpaa2_annot_hdr *annotation =
			(struct dpaa2_annot_hdr *)hw_annot_addr;

	PMD_RX_LOG(DEBUG, "annotation = 0x%lx   ", annotation->word4);

	if (BIT_ISSET_AT_POS(annotation->word3, L2_ARP_PRESENT)) {
		pkt_type = RTE_PTYPE_L2_ETHER_ARP;
		goto parse_done;
	} else if (BIT_ISSET_AT_POS(annotation->word3, L2_ETH_MAC_PRESENT)) {
		pkt_type = RTE_PTYPE_L2_ETHER;
	} else {
		goto parse_done;
	}

	if (BIT_ISSET_AT_POS(annotation->word4, L3_IPV4_1_PRESENT |
			     L3_IPV4_N_PRESENT)) {
		pkt_type |= RTE_PTYPE_L3_IPV4;
		if (BIT_ISSET_AT_POS(annotation->word4, L3_IP_1_OPT_PRESENT |
			L3_IP_N_OPT_PRESENT))
			pkt_type |= RTE_PTYPE_L3_IPV4_EXT;

	} else if (BIT_ISSET_AT_POS(annotation->word4, L3_IPV6_1_PRESENT |
		  L3_IPV6_N_PRESENT)) {
		pkt_type |= RTE_PTYPE_L3_IPV6;
		if (BIT_ISSET_AT_POS(annotation->word4, L3_IP_1_OPT_PRESENT |
		    L3_IP_N_OPT_PRESENT))
			pkt_type |= RTE_PTYPE_L3_IPV6_EXT;
	} else {
		goto parse_done;
	}

	if (BIT_ISSET_AT_POS(annotation->word4, L3_IP_1_FIRST_FRAGMENT |
	    L3_IP_1_MORE_FRAGMENT |
	    L3_IP_N_FIRST_FRAGMENT |
	    L3_IP_N_MORE_FRAGMENT)) {
		pkt_type |= RTE_PTYPE_L4_FRAG;
		goto parse_done;
	} else {
		pkt_type |= RTE_PTYPE_L4_NONFRAG;
	}

	if (BIT_ISSET_AT_POS(annotation->word4, L3_PROTO_UDP_PRESENT))
		pkt_type |= RTE_PTYPE_L4_UDP;

	else if (BIT_ISSET_AT_POS(annotation->word4, L3_PROTO_TCP_PRESENT))
		pkt_type |= RTE_PTYPE_L4_TCP;

	else if (BIT_ISSET_AT_POS(annotation->word4, L3_PROTO_SCTP_PRESENT))
		pkt_type |= RTE_PTYPE_L4_SCTP;

	else if (BIT_ISSET_AT_POS(annotation->word4, L3_PROTO_ICMP_PRESENT))
		pkt_type |= RTE_PTYPE_L4_ICMP;

	else if (BIT_ISSET_AT_POS(annotation->word4, L3_IP_UNKNOWN_PROTOCOL))
		pkt_type |= RTE_PTYPE_UNKNOWN;

parse_done:
	return pkt_type;
}

static inline void __attribute__((hot))
dpaa2_dev_rx_offload(uint64_t hw_annot_addr, struct rte_mbuf *mbuf)
{
	struct dpaa2_annot_hdr *annotation =
		(struct dpaa2_annot_hdr *)hw_annot_addr;

	if (BIT_ISSET_AT_POS(annotation->word3,
			     L2_VLAN_1_PRESENT | L2_VLAN_N_PRESENT))
		mbuf->ol_flags |= PKT_RX_VLAN_PKT;

	if (BIT_ISSET_AT_POS(annotation->word8, DPAA2_ETH_FAS_L3CE))
		mbuf->ol_flags |= PKT_RX_IP_CKSUM_BAD;

	if (BIT_ISSET_AT_POS(annotation->word8, DPAA2_ETH_FAS_L4CE))
		mbuf->ol_flags |= PKT_RX_L4_CKSUM_BAD;
}

static inline struct rte_mbuf *__attribute__((hot))
eth_fd_to_mbuf(const struct qbman_fd *fd)
{
	struct rte_mbuf *mbuf = DPAA2_INLINE_MBUF_FROM_BUF(
		DPAA2_IOVA_TO_VADDR(DPAA2_GET_FD_ADDR(fd)),
		     rte_dpaa2_bpid_info[DPAA2_GET_FD_BPID(fd)].meta_data_size);

	/* need to repopulated some of the fields,
	 * as they may have changed in last transmission
	 */
	mbuf->nb_segs = 1;
	mbuf->ol_flags = 0;
	mbuf->data_off = DPAA2_GET_FD_OFFSET(fd);
	mbuf->data_len = DPAA2_GET_FD_LEN(fd);
	mbuf->pkt_len = mbuf->data_len;

	/* Parse the packet */
	/* parse results are after the private - sw annotation area */
	mbuf->packet_type = dpaa2_dev_rx_parse(
			(uint64_t)DPAA2_IOVA_TO_VADDR(DPAA2_GET_FD_ADDR(fd))
			 + DPAA2_FD_PTA_SIZE);

	dpaa2_dev_rx_offload((uint64_t)DPAA2_IOVA_TO_VADDR(
			     DPAA2_GET_FD_ADDR(fd)) +
			     DPAA2_FD_PTA_SIZE, mbuf);

	mbuf->next = NULL;
	rte_mbuf_refcnt_set(mbuf, 1);

	PMD_RX_LOG(DEBUG, "to mbuf - mbuf =%p, mbuf->buf_addr =%p, off = %d,"
		"fd_off=%d fd =%lx, meta = %d  bpid =%d, len=%d\n",
		mbuf, mbuf->buf_addr, mbuf->data_off,
		DPAA2_GET_FD_OFFSET(fd), DPAA2_GET_FD_ADDR(fd),
		rte_dpaa2_bpid_info[DPAA2_GET_FD_BPID(fd)].meta_data_size,
		DPAA2_GET_FD_BPID(fd), DPAA2_GET_FD_LEN(fd));

	return mbuf;
}

static void __attribute__ ((noinline)) __attribute__((hot))
eth_mbuf_to_fd(struct rte_mbuf *mbuf,
	       struct qbman_fd *fd, uint16_t bpid)
{
	/*Resetting the buffer pool id and offset field*/
	fd->simple.bpid_offset = 0;

	DPAA2_SET_FD_ADDR(fd, DPAA2_MBUF_VADDR_TO_IOVA(mbuf));
	DPAA2_SET_FD_LEN(fd, mbuf->data_len);
	DPAA2_SET_FD_BPID(fd, bpid);
	DPAA2_SET_FD_OFFSET(fd, mbuf->data_off);
	DPAA2_SET_FD_ASAL(fd, DPAA2_ASAL_VAL);

	PMD_TX_LOG(DEBUG, "mbuf =%p, mbuf->buf_addr =%p, off = %d,"
		"fd_off=%d fd =%lx, meta = %d  bpid =%d, len=%d\n",
		mbuf, mbuf->buf_addr, mbuf->data_off,
		DPAA2_GET_FD_OFFSET(fd), DPAA2_GET_FD_ADDR(fd),
		rte_dpaa2_bpid_info[DPAA2_GET_FD_BPID(fd)].meta_data_size,
		DPAA2_GET_FD_BPID(fd), DPAA2_GET_FD_LEN(fd));
}


static inline int __attribute__((hot))
eth_copy_mbuf_to_fd(struct rte_mbuf *mbuf,
		    struct qbman_fd *fd, uint16_t bpid)
{
	struct rte_mbuf *m;
	void *mb = NULL;

	if (rte_dpaa2_mbuf_alloc_bulk(
		rte_dpaa2_bpid_info[bpid].bp_list->mp, &mb, 1)) {
		PMD_TX_LOG(WARNING, "Unable to allocated DPAA2 buffer");
		rte_pktmbuf_free(mbuf);
		return -1;
	}
	m = (struct rte_mbuf *)mb;
	memcpy((char *)m->buf_addr + mbuf->data_off,
	       (void *)((char *)mbuf->buf_addr + mbuf->data_off),
		mbuf->pkt_len);

	/* Copy required fields */
	m->data_off = mbuf->data_off;
	m->ol_flags = mbuf->ol_flags;
	m->packet_type = mbuf->packet_type;
	m->tx_offload = mbuf->tx_offload;

	/*Resetting the buffer pool id and offset field*/
	fd->simple.bpid_offset = 0;

	DPAA2_SET_FD_ADDR(fd, DPAA2_MBUF_VADDR_TO_IOVA(m));
	DPAA2_SET_FD_LEN(fd, mbuf->data_len);
	DPAA2_SET_FD_BPID(fd, bpid);
	DPAA2_SET_FD_OFFSET(fd, mbuf->data_off);
	DPAA2_SET_FD_ASAL(fd, DPAA2_ASAL_VAL);

	PMD_TX_LOG(DEBUG, " mbuf %p BMAN buf addr %p",
		   (void *)mbuf, mbuf->buf_addr);

	PMD_TX_LOG(DEBUG, " fdaddr =%lx bpid =%d meta =%d off =%d, len =%d",
		   DPAA2_GET_FD_ADDR(fd),
		DPAA2_GET_FD_BPID(fd),
		rte_dpaa2_bpid_info[DPAA2_GET_FD_BPID(fd)].meta_data_size,
		DPAA2_GET_FD_OFFSET(fd),
		DPAA2_GET_FD_LEN(fd));
	/*free the original packet */
	rte_pktmbuf_free(mbuf);

	return 0;
}

uint16_t
dpaa2_dev_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
	/* Function is responsible to receive frames for a given device and VQ*/
	struct dpaa2_queue *dpaa2_q = (struct dpaa2_queue *)queue;
	struct qbman_result *dq_storage;
	uint32_t fqid = dpaa2_q->fqid;
	int ret, num_rx = 0;
	uint8_t is_last = 0, status;
	struct qbman_swp *swp;
	const struct qbman_fd *fd;
	struct qbman_pull_desc pulldesc;
	struct rte_eth_dev *dev = dpaa2_q->dev;

	if (unlikely(!DPAA2_PER_LCORE_DPIO)) {
		ret = dpaa2_affine_qbman_swp();
		if (ret) {
			RTE_LOG(ERR, PMD, "Failure in affining portal\n");
			return 0;
		}
	}
	swp = DPAA2_PER_LCORE_PORTAL;
	dq_storage = dpaa2_q->q_storage->dq_storage[0];

	qbman_pull_desc_clear(&pulldesc);
	qbman_pull_desc_set_numframes(&pulldesc,
				      (nb_pkts > DPAA2_DQRR_RING_SIZE) ?
				       DPAA2_DQRR_RING_SIZE : nb_pkts);
	qbman_pull_desc_set_fq(&pulldesc, fqid);
	/* todo optimization - we can have dq_storage_phys available*/
	qbman_pull_desc_set_storage(&pulldesc, dq_storage,
			(dma_addr_t)(DPAA2_VADDR_TO_IOVA(dq_storage)), 1);

	/*Issue a volatile dequeue command. */
	while (1) {
		if (qbman_swp_pull(swp, &pulldesc)) {
			PMD_RX_LOG(ERR, "VDQ command is not issued."
				   "QBMAN is busy\n");
			/* Portal was busy, try again */
			continue;
		}
		break;
	};

	/* Receive the packets till Last Dequeue entry is found with
	 * respect to the above issues PULL command.
	 */
	while (!is_last) {
		struct rte_mbuf *mbuf;
		/*Check if the previous issued command is completed.
		 * Also seems like the SWP is shared between the
		 * Ethernet Driver and the SEC driver.
		 */
		while (!qbman_check_command_complete(swp, dq_storage))
			;
		/* Loop until the dq_storage is updated with
		 * new token by QBMAN
		 */
		while (!qbman_result_has_new_result(swp, dq_storage))
			;
		/* Check whether Last Pull command is Expired and
		 * setting Condition for Loop termination
		 */
		if (qbman_result_DQ_is_pull_complete(dq_storage)) {
			is_last = 1;
			/* Check for valid frame. */
			status = (uint8_t)qbman_result_DQ_flags(dq_storage);
			if (unlikely((status & QBMAN_DQ_STAT_VALIDFRAME) == 0))
				continue;
		}

		fd = qbman_result_DQ_fd(dq_storage);
		mbuf = (struct rte_mbuf *)DPAA2_IOVA_TO_VADDR(
		   DPAA2_GET_FD_ADDR(fd)
		   - rte_dpaa2_bpid_info[DPAA2_GET_FD_BPID(fd)].meta_data_size);
		/* Prefeth mbuf */
		rte_prefetch0(mbuf);
		/* Prefetch Annotation address for the parse results */
		rte_prefetch0((void *)((uint64_t)DPAA2_GET_FD_ADDR(fd)
						+ DPAA2_FD_PTA_SIZE + 16));

		bufs[num_rx] = eth_fd_to_mbuf(fd);
		bufs[num_rx]->port = dev->data->port_id;

		num_rx++;
		dq_storage++;
	} /* End of Packet Rx loop */

	dpaa2_q->rx_pkts += num_rx;

	/*Return the total number of packets received to DPAA2 app*/
	return num_rx;
}

/*
 * Callback to handle sending packets through WRIOP based interface
 */
uint16_t
dpaa2_dev_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
	/* Function to transmit the frames to given device and VQ*/
	uint32_t loop;
	int32_t ret;
	struct qbman_fd fd_arr[MAX_TX_RING_SLOTS];
	uint32_t frames_to_send;
	struct rte_mempool *mp;
	struct qbman_eq_desc eqdesc;
	struct dpaa2_queue *dpaa2_q = (struct dpaa2_queue *)queue;
	struct qbman_swp *swp;
	uint16_t num_tx = 0;
	uint16_t bpid;
	struct rte_eth_dev *dev = dpaa2_q->dev;
	struct dpaa2_dev_priv *priv = dev->data->dev_private;

	if (unlikely(!DPAA2_PER_LCORE_DPIO)) {
		ret = dpaa2_affine_qbman_swp();
		if (ret) {
			RTE_LOG(ERR, PMD, "Failure in affining portal\n");
			return 0;
		}
	}
	swp = DPAA2_PER_LCORE_PORTAL;

	PMD_TX_LOG(DEBUG, "===> dev =%p, fqid =%d", dev, dpaa2_q->fqid);

	/*Prepare enqueue descriptor*/
	qbman_eq_desc_clear(&eqdesc);
	qbman_eq_desc_set_no_orp(&eqdesc, DPAA2_EQ_RESP_ERR_FQ);
	qbman_eq_desc_set_response(&eqdesc, 0, 0);
	qbman_eq_desc_set_qd(&eqdesc, priv->qdid,
			     dpaa2_q->flow_id, dpaa2_q->tc_index);

	/*Clear the unused FD fields before sending*/
	while (nb_pkts) {
		frames_to_send = (nb_pkts >> 3) ? MAX_TX_RING_SLOTS : nb_pkts;

		for (loop = 0; loop < frames_to_send; loop++) {
			fd_arr[loop].simple.frc = 0;
			DPAA2_RESET_FD_CTRL((&fd_arr[loop]));
			DPAA2_SET_FD_FLC((&fd_arr[loop]), NULL);
			mp = (*bufs)->pool;
			/* Not a hw_pkt pool allocated frame */
			if (mp->ops_index != priv->bp_list->dpaa2_ops_index) {
				PMD_TX_LOG(ERR, "non hw offload bufffer ");
				/* alloc should be from the default buffer pool
				 * attached to this interface
				 */
				if (priv->bp_list) {
					bpid = priv->bp_list->buf_pool.bpid;
				} else {
					PMD_TX_LOG(ERR, "errr: why no bpool"
						   " attached");
					num_tx = 0;
					goto skip_tx;
				}
				if (eth_copy_mbuf_to_fd(*bufs,
							&fd_arr[loop], bpid)) {
					bufs++;
					continue;
				}
			} else {
				bpid = mempool_to_bpid(mp);
				eth_mbuf_to_fd(*bufs, &fd_arr[loop], bpid);
			}
			bufs++;
		}
		loop = 0;
		while (loop < frames_to_send) {
			loop += qbman_swp_send_multiple(swp, &eqdesc,
					&fd_arr[loop], frames_to_send - loop);
		}

		num_tx += frames_to_send;
		dpaa2_q->tx_pkts += frames_to_send;
		nb_pkts -= frames_to_send;
	}
skip_tx:
	return num_tx;
}