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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2017 Intel Corporation
 */

#ifndef _AVF_ETHDEV_H_
#define _AVF_ETHDEV_H_

#include <rte_kvargs.h>

#define AVF_AQ_LEN               32
#define AVF_AQ_BUF_SZ            4096
#define AVF_RESET_WAIT_CNT       50
#define AVF_BUF_SIZE_MIN         1024
#define AVF_FRAME_SIZE_MAX       9728
#define AVF_QUEUE_BASE_ADDR_UNIT 128

#define AVF_MAX_NUM_QUEUES       16

#define AVF_NUM_MACADDR_MAX      64

#define AVF_DEFAULT_RX_PTHRESH      8
#define AVF_DEFAULT_RX_HTHRESH      8
#define AVF_DEFAULT_RX_WTHRESH      0

#define AVF_DEFAULT_RX_FREE_THRESH  32

#define AVF_DEFAULT_TX_PTHRESH      32
#define AVF_DEFAULT_TX_HTHRESH      0
#define AVF_DEFAULT_TX_WTHRESH      0

#define AVF_DEFAULT_TX_FREE_THRESH  32
#define AVF_DEFAULT_TX_RS_THRESH 32

#define AVF_BASIC_OFFLOAD_CAPS  ( \
	VF_BASE_MODE_OFFLOADS | \
	VIRTCHNL_VF_OFFLOAD_WB_ON_ITR | \
	VIRTCHNL_VF_OFFLOAD_RX_POLLING)

#define AVF_RSS_OFFLOAD_ALL ( \
	ETH_RSS_FRAG_IPV4 |         \
	ETH_RSS_NONFRAG_IPV4_TCP |  \
	ETH_RSS_NONFRAG_IPV4_UDP |  \
	ETH_RSS_NONFRAG_IPV4_SCTP | \
	ETH_RSS_NONFRAG_IPV4_OTHER)

#define AVF_MISC_VEC_ID                RTE_INTR_VEC_ZERO_OFFSET
#define AVF_RX_VEC_START               RTE_INTR_VEC_RXTX_OFFSET

/* Default queue interrupt throttling time in microseconds */
#define AVF_ITR_INDEX_DEFAULT          0
#define AVF_QUEUE_ITR_INTERVAL_DEFAULT 32 /* 32 us */
#define AVF_QUEUE_ITR_INTERVAL_MAX     8160 /* 8160 us */

/* The overhead from MTU to max frame size.
 * Considering QinQ packet, the VLAN tag needs to be counted twice.
 */
#define AVF_VLAN_TAG_SIZE               4
#define AVF_ETH_OVERHEAD \
	(ETHER_HDR_LEN + ETHER_CRC_LEN + AVF_VLAN_TAG_SIZE * 2)

struct avf_adapter;
struct avf_rx_queue;
struct avf_tx_queue;

/* Structure that defines a VSI, associated with a adapter. */
struct avf_vsi {
	struct avf_adapter *adapter; /* Backreference to associated adapter */
	uint16_t vsi_id;
	uint16_t nb_qps;         /* Number of queue pairs VSI can occupy */
	uint16_t nb_used_qps;    /* Number of queue pairs VSI uses */
	uint16_t max_macaddrs;   /* Maximum number of MAC addresses */
	uint16_t base_vector;
	uint16_t msix_intr;      /* The MSIX interrupt binds to VSI */
};

/* TODO: is that correct to assume the max number to be 16 ?*/
#define AVF_MAX_MSIX_VECTORS   16

/* Structure to store private data specific for VF instance. */
struct avf_info {
	uint16_t num_queue_pairs;
	uint16_t max_pkt_len; /* Maximum packet length */
	uint16_t mac_num;     /* Number of MAC addresses */
	bool promisc_unicast_enabled;
	bool promisc_multicast_enabled;

	struct virtchnl_version_info virtchnl_version;
	struct virtchnl_vf_resource *vf_res; /* VF resource */
	struct virtchnl_vsi_resource *vsi_res; /* LAN VSI */

	volatile enum virtchnl_ops pend_cmd; /* pending command not finished */
	uint32_t cmd_retval; /* return value of the cmd response from PF */
	uint8_t *aq_resp; /* buffer to store the adminq response from PF */

	/* Event from pf */
	bool dev_closed;
	bool link_up;
	enum virtchnl_link_speed link_speed;

	struct avf_vsi vsi;
	bool vf_reset;
	uint64_t flags;

	uint8_t *rss_lut;
	uint8_t *rss_key;
	uint16_t nb_msix;   /* number of MSI-X interrupts on Rx */
	uint16_t msix_base; /* msix vector base from */
	/* queue bitmask for each vector */
	uint16_t rxq_map[AVF_MAX_MSIX_VECTORS];
};

#define AVF_MAX_PKT_TYPE 256

/* Structure to store private data for each VF instance. */
struct avf_adapter {
	struct avf_hw hw;
	struct rte_eth_dev *eth_dev;
	struct avf_info vf;

	bool rx_bulk_alloc_allowed;
	/* For vector PMD */
	bool rx_vec_allowed;
	bool tx_vec_allowed;
};

/* AVF_DEV_PRIVATE_TO */
#define AVF_DEV_PRIVATE_TO_ADAPTER(adapter) \
	((struct avf_adapter *)adapter)
#define AVF_DEV_PRIVATE_TO_VF(adapter) \
	(&((struct avf_adapter *)adapter)->vf)
#define AVF_DEV_PRIVATE_TO_HW(adapter) \
	(&((struct avf_adapter *)adapter)->hw)

/* AVF_VSI_TO */
#define AVF_VSI_TO_HW(vsi) \
	(&(((struct avf_vsi *)vsi)->adapter->hw))
#define AVF_VSI_TO_VF(vsi) \
	(&(((struct avf_vsi *)vsi)->adapter->vf))
#define AVF_VSI_TO_ETH_DEV(vsi) \
	(((struct avf_vsi *)vsi)->adapter->eth_dev)

static inline void
avf_init_adminq_parameter(struct avf_hw *hw)
{
	hw->aq.num_arq_entries = AVF_AQ_LEN;
	hw->aq.num_asq_entries = AVF_AQ_LEN;
	hw->aq.arq_buf_size = AVF_AQ_BUF_SZ;
	hw->aq.asq_buf_size = AVF_AQ_BUF_SZ;
}

static inline uint16_t
avf_calc_itr_interval(int16_t interval)
{
	if (interval < 0 || interval > AVF_QUEUE_ITR_INTERVAL_MAX)
		interval = AVF_QUEUE_ITR_INTERVAL_DEFAULT;

	/* Convert to hardware count, as writing each 1 represents 2 us */
	return interval / 2;
}

/* structure used for sending and checking response of virtchnl ops */
struct avf_cmd_info {
	enum virtchnl_ops ops;
	uint8_t *in_args;       /* buffer for sending */
	uint32_t in_args_size;  /* buffer size for sending */
	uint8_t *out_buffer;    /* buffer for response */
	uint32_t out_size;      /* buffer size for response */
};

/* clear current command. Only call in case execute
 * _atomic_set_cmd successfully.
 */
static inline void
_clear_cmd(struct avf_info *vf)
{
	rte_wmb();
	vf->pend_cmd = VIRTCHNL_OP_UNKNOWN;
	vf->cmd_retval = VIRTCHNL_STATUS_SUCCESS;
}

/* Check there is pending cmd in execution. If none, set new command. */
static inline int
_atomic_set_cmd(struct avf_info *vf, enum virtchnl_ops ops)
{
	int ret = rte_atomic32_cmpset(&vf->pend_cmd, VIRTCHNL_OP_UNKNOWN, ops);

	if (!ret)
		PMD_DRV_LOG(ERR, "There is incomplete cmd %d", vf->pend_cmd);

	return !ret;
}

int avf_check_api_version(struct avf_adapter *adapter);
int avf_get_vf_resource(struct avf_adapter *adapter);
void avf_handle_virtchnl_msg(struct rte_eth_dev *dev);
int avf_enable_vlan_strip(struct avf_adapter *adapter);
int avf_disable_vlan_strip(struct avf_adapter *adapter);
int avf_switch_queue(struct avf_adapter *adapter, uint16_t qid,
		     bool rx, bool on);
int avf_enable_queues(struct avf_adapter *adapter);
int avf_disable_queues(struct avf_adapter *adapter);
int avf_configure_rss_lut(struct avf_adapter *adapter);
int avf_configure_rss_key(struct avf_adapter *adapter);
int avf_configure_queues(struct avf_adapter *adapter);
int avf_config_irq_map(struct avf_adapter *adapter);
void avf_add_del_all_mac_addr(struct avf_adapter *adapter, bool add);
int avf_dev_link_update(struct rte_eth_dev *dev,
			__rte_unused int wait_to_complete);
int avf_query_stats(struct avf_adapter *adapter,
		    struct virtchnl_eth_stats **pstats);
int avf_config_promisc(struct avf_adapter *adapter, bool enable_unicast,
		       bool enable_multicast);
int avf_add_del_eth_addr(struct avf_adapter *adapter,
			 struct ether_addr *addr, bool add);
int avf_add_del_vlan(struct avf_adapter *adapter, uint16_t vlanid, bool add);
#endif /* _AVF_ETHDEV_H_ */