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path: root/drivers/net/qede/qede_rxtx.h
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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright (c) 2016 - 2018 Cavium Inc.
 * All rights reserved.
 * www.cavium.com
 */


#ifndef _QEDE_RXTX_H_
#define _QEDE_RXTX_H_

#include "qede_ethdev.h"

/* Ring Descriptors */
#define RX_RING_SIZE_POW        16	/* 64K */
#define RX_RING_SIZE            (1ULL << RX_RING_SIZE_POW)
#define NUM_RX_BDS_MAX          (RX_RING_SIZE - 1)
#define NUM_RX_BDS_MIN          128
#define NUM_RX_BDS_DEF          NUM_RX_BDS_MAX
#define NUM_RX_BDS(q)           (q->nb_rx_desc - 1)

#define TX_RING_SIZE_POW        16	/* 64K */
#define TX_RING_SIZE            (1ULL << TX_RING_SIZE_POW)
#define NUM_TX_BDS_MAX          (TX_RING_SIZE - 1)
#define NUM_TX_BDS_MIN          128
#define NUM_TX_BDS_DEF          NUM_TX_BDS_MAX
#define NUM_TX_BDS(q)           (q->nb_tx_desc - 1)

#define TX_CONS(txq)            (txq->sw_tx_cons & NUM_TX_BDS(txq))
#define TX_PROD(txq)            (txq->sw_tx_prod & NUM_TX_BDS(txq))

#define QEDE_DEFAULT_TX_FREE_THRESH	32

#define QEDE_CSUM_ERROR			(1 << 0)
#define QEDE_CSUM_UNNECESSARY		(1 << 1)
#define QEDE_TUNN_CSUM_UNNECESSARY	(1 << 2)

#define QEDE_BD_SET_ADDR_LEN(bd, maddr, len) \
	do { \
		(bd)->addr.hi = rte_cpu_to_le_32(U64_HI(maddr)); \
		(bd)->addr.lo = rte_cpu_to_le_32(U64_LO(maddr)); \
		(bd)->nbytes = rte_cpu_to_le_16(len); \
	} while (0)

#define CQE_HAS_VLAN(flags) \
	((flags) & (PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK \
		<< PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT))

#define CQE_HAS_OUTER_VLAN(flags) \
	((flags) & (PARSING_AND_ERR_FLAGS_TUNNEL8021QTAGEXIST_MASK \
		<< PARSING_AND_ERR_FLAGS_TUNNEL8021QTAGEXIST_SHIFT))

#define QEDE_MIN_RX_BUFF_SIZE		(1024)
#define QEDE_VLAN_TAG_SIZE		(4)
#define QEDE_LLC_SNAP_HDR_LEN		(8)

/* Max supported alignment is 256 (8 shift)
 * minimal alignment shift 6 is optimal for 57xxx HW performance
 */
#define QEDE_L1_CACHE_SHIFT	6
#define QEDE_RX_ALIGN_SHIFT	(RTE_MAX(6, RTE_MIN(8, QEDE_L1_CACHE_SHIFT)))
#define QEDE_FW_RX_ALIGN_END	(1UL << QEDE_RX_ALIGN_SHIFT)
#define QEDE_CEIL_TO_CACHE_LINE_SIZE(n) (((n) + (QEDE_FW_RX_ALIGN_END - 1)) & \
					~(QEDE_FW_RX_ALIGN_END - 1))
#define QEDE_FLOOR_TO_CACHE_LINE_SIZE(n) RTE_ALIGN_FLOOR(n, \
							 QEDE_FW_RX_ALIGN_END)

/* Note: QEDE_LLC_SNAP_HDR_LEN is optional,
 * +2 is for padding in front of L2 header
 */
#define QEDE_ETH_OVERHEAD	(((2 * QEDE_VLAN_TAG_SIZE)) \
				 + (QEDE_LLC_SNAP_HDR_LEN) + 2)

#define QEDE_MAX_ETHER_HDR_LEN	(ETHER_HDR_LEN + QEDE_ETH_OVERHEAD)

#define QEDE_RSS_OFFLOAD_ALL    (ETH_RSS_IPV4			|\
				 ETH_RSS_NONFRAG_IPV4_TCP	|\
				 ETH_RSS_NONFRAG_IPV4_UDP	|\
				 ETH_RSS_IPV6			|\
				 ETH_RSS_NONFRAG_IPV6_TCP	|\
				 ETH_RSS_NONFRAG_IPV6_UDP	|\
				 ETH_RSS_VXLAN			|\
				 ETH_RSS_GENEVE)

#define for_each_rss(i)		for (i = 0; i < qdev->num_rx_queues; i++)
#define for_each_tss(i)		for (i = 0; i < qdev->num_tx_queues; i++)
#define QEDE_RXTX_MAX(qdev) \
	(RTE_MAX(QEDE_RSS_COUNT(qdev), QEDE_TSS_COUNT(qdev)))

/* Macros for non-tunnel packet types lkup table */
#define QEDE_PKT_TYPE_UNKNOWN				0x0
#define QEDE_PKT_TYPE_MAX				0x3f

#define QEDE_PKT_TYPE_IPV4				0x1
#define QEDE_PKT_TYPE_IPV6				0x2
#define QEDE_PKT_TYPE_IPV4_TCP				0x5
#define QEDE_PKT_TYPE_IPV6_TCP				0x6
#define QEDE_PKT_TYPE_IPV4_UDP				0x9
#define QEDE_PKT_TYPE_IPV6_UDP				0xa

/* For frag pkts, corresponding IP bits is set */
#define QEDE_PKT_TYPE_IPV4_FRAG				0x11
#define QEDE_PKT_TYPE_IPV6_FRAG				0x12

#define QEDE_PKT_TYPE_IPV4_VLAN				0x21
#define QEDE_PKT_TYPE_IPV6_VLAN				0x22
#define QEDE_PKT_TYPE_IPV4_TCP_VLAN			0x25
#define QEDE_PKT_TYPE_IPV6_TCP_VLAN			0x26
#define QEDE_PKT_TYPE_IPV4_UDP_VLAN			0x29
#define QEDE_PKT_TYPE_IPV6_UDP_VLAN			0x2a

#define QEDE_PKT_TYPE_IPV4_VLAN_FRAG			0x31
#define QEDE_PKT_TYPE_IPV6_VLAN_FRAG			0x32

/* Macros for tunneled packets with next protocol lkup table */
#define QEDE_PKT_TYPE_TUNN_GENEVE			0x1
#define QEDE_PKT_TYPE_TUNN_GRE				0x2
#define QEDE_PKT_TYPE_TUNN_VXLAN			0x3

/* Bit 2 is don't care bit */
#define QEDE_PKT_TYPE_TUNN_L2_TENID_NOEXIST_GENEVE	0x9
#define QEDE_PKT_TYPE_TUNN_L2_TENID_NOEXIST_GRE		0xa
#define QEDE_PKT_TYPE_TUNN_L2_TENID_NOEXIST_VXLAN	0xb

#define QEDE_PKT_TYPE_TUNN_L2_TENID_EXIST_GENEVE	0xd
#define QEDE_PKT_TYPE_TUNN_L2_TENID_EXIST_GRE		0xe
#define QEDE_PKT_TYPE_TUNN_L2_TENID_EXIST_VXLAN		0xf


#define QEDE_PKT_TYPE_TUNN_IPV4_TENID_NOEXIST_GENEVE    0x11
#define QEDE_PKT_TYPE_TUNN_IPV4_TENID_NOEXIST_GRE       0x12
#define QEDE_PKT_TYPE_TUNN_IPV4_TENID_NOEXIST_VXLAN     0x13

#define QEDE_PKT_TYPE_TUNN_IPV4_TENID_EXIST_GENEVE	0x15
#define QEDE_PKT_TYPE_TUNN_IPV4_TENID_EXIST_GRE		0x16
#define QEDE_PKT_TYPE_TUNN_IPV4_TENID_EXIST_VXLAN	0x17


#define QEDE_PKT_TYPE_TUNN_IPV6_TENID_NOEXIST_GENEVE    0x19
#define QEDE_PKT_TYPE_TUNN_IPV6_TENID_NOEXIST_GRE       0x1a
#define QEDE_PKT_TYPE_TUNN_IPV6_TENID_NOEXIST_VXLAN     0x1b

#define QEDE_PKT_TYPE_TUNN_IPV6_TENID_EXIST_GENEVE      0x1d
#define QEDE_PKT_TYPE_TUNN_IPV6_TENID_EXIST_GRE		0x1e
#define QEDE_PKT_TYPE_TUNN_IPV6_TENID_EXIST_VXLAN       0x1f

#define QEDE_PKT_TYPE_TUNN_MAX_TYPE			0x20 /* 2^5 */

#define QEDE_TX_CSUM_OFFLOAD_MASK (PKT_TX_IP_CKSUM              | \
				   PKT_TX_TCP_CKSUM             | \
				   PKT_TX_UDP_CKSUM             | \
				   PKT_TX_OUTER_IP_CKSUM        | \
				   PKT_TX_TCP_SEG		| \
				   PKT_TX_IPV4			| \
				   PKT_TX_IPV6)

#define QEDE_TX_OFFLOAD_MASK (QEDE_TX_CSUM_OFFLOAD_MASK | \
			      PKT_TX_VLAN_PKT		| \
			      PKT_TX_TUNNEL_MASK)

#define QEDE_TX_OFFLOAD_NOTSUP_MASK \
	(PKT_TX_OFFLOAD_MASK ^ QEDE_TX_OFFLOAD_MASK)

/*
 * RX BD descriptor ring
 */
struct qede_rx_entry {
	struct rte_mbuf *mbuf;
	uint32_t page_offset;
	/* allows expansion .. */
};

/* TPA related structures */
struct qede_agg_info {
	struct rte_mbuf *tpa_head; /* Pointer to first TPA segment */
	struct rte_mbuf *tpa_tail; /* Pointer to last TPA segment */
};

/*
 * Structure associated with each RX queue.
 */
struct qede_rx_queue {
	struct rte_mempool *mb_pool;
	struct ecore_chain rx_bd_ring;
	struct ecore_chain rx_comp_ring;
	uint16_t *hw_cons_ptr;
	void OSAL_IOMEM *hw_rxq_prod_addr;
	struct qede_rx_entry *sw_rx_ring;
	struct ecore_sb_info *sb_info;
	uint16_t sw_rx_cons;
	uint16_t sw_rx_prod;
	uint16_t nb_rx_desc;
	uint16_t queue_id;
	uint16_t port_id;
	uint16_t rx_buf_size;
	uint16_t rx_alloc_count;
	uint16_t unused;
	uint64_t rcv_pkts;
	uint64_t rx_segs;
	uint64_t rx_hw_errors;
	uint64_t rx_alloc_errors;
	struct qede_agg_info tpa_info[ETH_TPA_MAX_AGGS_NUM];
	struct qede_dev *qdev;
	void *handle;
};

/*
 * TX BD descriptor ring
 */
struct qede_tx_entry {
	struct rte_mbuf *mbuf;
	uint8_t flags;
};

union db_prod {
	struct eth_db_data data;
	uint32_t raw;
};

struct qede_tx_queue {
	struct ecore_chain tx_pbl;
	struct qede_tx_entry *sw_tx_ring;
	uint16_t nb_tx_desc;
	uint16_t nb_tx_avail;
	uint16_t tx_free_thresh;
	uint16_t queue_id;
	uint16_t *hw_cons_ptr;
	uint16_t sw_tx_cons;
	uint16_t sw_tx_prod;
	void OSAL_IOMEM *doorbell_addr;
	volatile union db_prod tx_db;
	uint16_t port_id;
	uint64_t xmit_pkts;
	bool is_legacy;
	struct qede_dev *qdev;
	void *handle;
};

struct qede_fastpath {
	struct ecore_sb_info *sb_info;
	struct qede_rx_queue *rxq;
	struct qede_tx_queue *txq;
};

/*
 * RX/TX function prototypes
 */
int qede_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
			uint16_t nb_desc, unsigned int socket_id,
			const struct rte_eth_rxconf *rx_conf,
			struct rte_mempool *mp);

int qede_tx_queue_setup(struct rte_eth_dev *dev,
			uint16_t queue_idx,
			uint16_t nb_desc,
			unsigned int socket_id,
			const struct rte_eth_txconf *tx_conf);

void qede_rx_queue_release(void *rx_queue);

void qede_tx_queue_release(void *tx_queue);

uint16_t qede_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts,
			uint16_t nb_pkts);

uint16_t qede_xmit_prep_pkts(void *p_txq, struct rte_mbuf **tx_pkts,
			     uint16_t nb_pkts);

uint16_t qede_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts,
			uint16_t nb_pkts);

uint16_t qede_rxtx_pkts_dummy(void *p_rxq,
			      struct rte_mbuf **pkts,
			      uint16_t nb_pkts);

int qede_start_queues(struct rte_eth_dev *eth_dev);

void qede_stop_queues(struct rte_eth_dev *eth_dev);
int qede_calc_rx_buf_size(struct rte_eth_dev *dev, uint16_t mbufsz,
			  uint16_t max_frame_size);
int
qede_rx_descriptor_status(void *rxq, uint16_t offset);

/* Fastpath resource alloc/dealloc helpers */
int qede_alloc_fp_resc(struct qede_dev *qdev);

void qede_dealloc_fp_resc(struct rte_eth_dev *eth_dev);

#endif /* _QEDE_RXTX_H_ */