include/linux/qed/qed_ll2_if.h - third_party/kernel - Git at Google

 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
 /* QLogic qed NIC Driver
  * Copyright (c) 2015-2017  QLogic Corporation
  * Copyright (c) 2019-2020 Marvell International Ltd.
  */

 #ifndef _QED_LL2_IF_H
 #define _QED_LL2_IF_H

 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <linux/skbuff.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/qed/qed_if.h>

 enum qed_ll2_conn_type {
 	QED_LL2_TYPE_FCOE,
 	QED_LL2_TYPE_TCP_ULP,
 	QED_LL2_TYPE_TEST,
 	QED_LL2_TYPE_OOO,
 	QED_LL2_TYPE_RESERVED2,
 	QED_LL2_TYPE_ROCE,
 	QED_LL2_TYPE_IWARP,
 	QED_LL2_TYPE_RESERVED3,
 	MAX_QED_LL2_CONN_TYPE
 };

 enum qed_ll2_rx_conn_type {
 	QED_LL2_RX_TYPE_LEGACY,
 	QED_LL2_RX_TYPE_CTX,
 	MAX_QED_LL2_RX_CONN_TYPE
 };

 enum qed_ll2_roce_flavor_type {
 	QED_LL2_ROCE,
 	QED_LL2_RROCE,
 	MAX_QED_LL2_ROCE_FLAVOR_TYPE
 };

 enum qed_ll2_tx_dest {
 	QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
 	QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
 	QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */
 	QED_LL2_TX_DEST_MAX
 };

 enum qed_ll2_error_handle {
 	QED_LL2_DROP_PACKET,
 	QED_LL2_DO_NOTHING,
 	QED_LL2_ASSERT,
 };

 struct qed_ll2_stats {
 	u64 gsi_invalid_hdr;
 	u64 gsi_invalid_pkt_length;
 	u64 gsi_unsupported_pkt_typ;
 	u64 gsi_crcchksm_error;

 	u64 packet_too_big_discard;
 	u64 no_buff_discard;

 	u64 rcv_ucast_bytes;
 	u64 rcv_mcast_bytes;
 	u64 rcv_bcast_bytes;
 	u64 rcv_ucast_pkts;
 	u64 rcv_mcast_pkts;
 	u64 rcv_bcast_pkts;

 	u64 sent_ucast_bytes;
 	u64 sent_mcast_bytes;
 	u64 sent_bcast_bytes;
 	u64 sent_ucast_pkts;
 	u64 sent_mcast_pkts;
 	u64 sent_bcast_pkts;
 };

 struct qed_ll2_comp_rx_data {
 	void *cookie;
 	dma_addr_t rx_buf_addr;
 	u16 parse_flags;
 	u16 err_flags;
 	u16 vlan;
 	bool b_last_packet;
 	u8 connection_handle;

 	union {
 		u16 packet_length;
 		u16 data_length;
 	} length;

 	u32 opaque_data_0;
 	u32 opaque_data_1;

 	/* GSI only */
 	u32 src_qp;
 	u16 qp_id;

 	union {
 		u8 placement_offset;
 		u8 data_length_error;
 	} u;
 };

 typedef
 void (*qed_ll2_complete_rx_packet_cb)(void *cxt,
 				      struct qed_ll2_comp_rx_data *data);

 typedef
 void (*qed_ll2_release_rx_packet_cb)(void *cxt,
 				     u8 connection_handle,
 				     void *cookie,
 				     dma_addr_t rx_buf_addr,
 				     bool b_last_packet);

 typedef
 void (*qed_ll2_complete_tx_packet_cb)(void *cxt,
 				      u8 connection_handle,
 				      void *cookie,
 				      dma_addr_t first_frag_addr,
 				      bool b_last_fragment,
 				      bool b_last_packet);

 typedef
 void (*qed_ll2_release_tx_packet_cb)(void *cxt,
 				     u8 connection_handle,
 				     void *cookie,
 				     dma_addr_t first_frag_addr,
 				     bool b_last_fragment, bool b_last_packet);

 typedef
 void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle,
 			    u32 opaque_data_0, u32 opaque_data_1);

 struct qed_ll2_cbs {
 	qed_ll2_complete_rx_packet_cb rx_comp_cb;
 	qed_ll2_release_rx_packet_cb rx_release_cb;
 	qed_ll2_complete_tx_packet_cb tx_comp_cb;
 	qed_ll2_release_tx_packet_cb tx_release_cb;
 	qed_ll2_slowpath_cb slowpath_cb;
 	void *cookie;
 };

 struct qed_ll2_acquire_data_inputs {
 	enum qed_ll2_rx_conn_type rx_conn_type;
 	enum qed_ll2_conn_type conn_type;
 	u16 mtu;
 	u16 rx_num_desc;
 	u16 rx_num_ooo_buffers;
 	u8 rx_drop_ttl0_flg;
 	u8 rx_vlan_removal_en;
 	u16 tx_num_desc;
 	u8 tx_max_bds_per_packet;
 	u8 tx_tc;
 	enum qed_ll2_tx_dest tx_dest;
 	enum qed_ll2_error_handle ai_err_packet_too_big;
 	enum qed_ll2_error_handle ai_err_no_buf;
 	bool secondary_queue;
 	u8 gsi_enable;
 };

 struct qed_ll2_acquire_data {
 	struct qed_ll2_acquire_data_inputs input;
 	const struct qed_ll2_cbs *cbs;

 	/* Output container for LL2 connection's handle */
 	u8 *p_connection_handle;
 };

 struct qed_ll2_tx_pkt_info {
 	void *cookie;
 	dma_addr_t first_frag;
 	enum qed_ll2_tx_dest tx_dest;
 	enum qed_ll2_roce_flavor_type qed_roce_flavor;
 	u16 vlan;
 	u16 l4_hdr_offset_w;	/* from start of packet */
 	u16 first_frag_len;
 	u8 num_of_bds;
 	u8 bd_flags;
 	bool enable_ip_cksum;
 	bool enable_l4_cksum;
 	bool calc_ip_len;
 	bool remove_stag;
 };

 #define QED_LL2_UNUSED_HANDLE   (0xff)

 struct qed_ll2_cb_ops {
 	int (*rx_cb)(void *, struct sk_buff *, u32, u32);
 	int (*tx_cb)(void *, struct sk_buff *, bool);
 };

 struct qed_ll2_params {
 	u16 mtu;
 	bool drop_ttl0_packets;
 	bool rx_vlan_stripping;
 	u8 tx_tc;
 	bool frags_mapped;
 	u8 ll2_mac_address[ETH_ALEN];
 };

 enum qed_ll2_xmit_flags {
 	/* FIP discovery packet */
 	QED_LL2_XMIT_FLAGS_FIP_DISCOVERY
 };

 struct qed_ll2_ops {
 /**
  * @brief start - initializes ll2
  *
  * @param cdev
  * @param params - protocol driver configuration for the ll2.
  *
  * @return 0 on success, otherwise error value.
  */
 	int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);

 /**
  * @brief stop - stops the ll2
  *
  * @param cdev
  *
  * @return 0 on success, otherwise error value.
  */
 	int (*stop)(struct qed_dev *cdev);

 /**
  * @brief start_xmit - transmits an skb over the ll2 interface
  *
  * @param cdev
  * @param skb
  * @param xmit_flags - Transmit options defined by the enum qed_ll2_xmit_flags.
  *
  * @return 0 on success, otherwise error value.
  */
 	int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb,
 			  unsigned long xmit_flags);

 /**
  * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
  * packets. Should be called before `start'.
  *
  * @param cdev
  * @param cookie - to be passed to the callback functions.
  * @param ops - the callback functions to register for Rx / Tx.
  *
  * @return 0 on success, otherwise error value.
  */
 	void (*register_cb_ops)(struct qed_dev *cdev,
 				const struct qed_ll2_cb_ops *ops,
 				void *cookie);

 /**
  * @brief get LL2 related statistics
  *
  * @param cdev
  * @param stats - pointer to struct that would be filled with stats
  *
  * @return 0 on success, error otherwise.
  */
 	int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
 };

 #ifdef CONFIG_QED_LL2
 int qed_ll2_alloc_if(struct qed_dev *);
 void qed_ll2_dealloc_if(struct qed_dev *);
 #else
 static const struct qed_ll2_ops qed_ll2_ops_pass = {
 	.start = NULL,
 	.stop = NULL,
 	.start_xmit = NULL,
 	.register_cb_ops = NULL,
 	.get_stats = NULL,
 };

 static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
 {
 	return 0;
 }

 static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)
 {
 }
 #endif
 #endif
	/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
	/* QLogic qed NIC Driver
	* Copyright (c) 2015-2017 QLogic Corporation
	* Copyright (c) 2019-2020 Marvell International Ltd.
	*/

	#ifndef _QED_LL2_IF_H
	#define _QED_LL2_IF_H

	#include <linux/types.h>
	#include <linux/interrupt.h>
	#include <linux/netdevice.h>
	#include <linux/pci.h>
	#include <linux/skbuff.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/qed/qed_if.h>

	enum qed_ll2_conn_type {
	QED_LL2_TYPE_FCOE,
	QED_LL2_TYPE_TCP_ULP,
	QED_LL2_TYPE_TEST,
	QED_LL2_TYPE_OOO,
	QED_LL2_TYPE_RESERVED2,
	QED_LL2_TYPE_ROCE,
	QED_LL2_TYPE_IWARP,
	QED_LL2_TYPE_RESERVED3,
	MAX_QED_LL2_CONN_TYPE
	};

	enum qed_ll2_rx_conn_type {
	QED_LL2_RX_TYPE_LEGACY,
	QED_LL2_RX_TYPE_CTX,
	MAX_QED_LL2_RX_CONN_TYPE
	};

	enum qed_ll2_roce_flavor_type {
	QED_LL2_ROCE,
	QED_LL2_RROCE,
	MAX_QED_LL2_ROCE_FLAVOR_TYPE
	};

	enum qed_ll2_tx_dest {
	QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
	QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
	QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */
	QED_LL2_TX_DEST_MAX
	};

	enum qed_ll2_error_handle {
	QED_LL2_DROP_PACKET,
	QED_LL2_DO_NOTHING,
	QED_LL2_ASSERT,
	};

	struct qed_ll2_stats {
	u64 gsi_invalid_hdr;
	u64 gsi_invalid_pkt_length;
	u64 gsi_unsupported_pkt_typ;
	u64 gsi_crcchksm_error;

	u64 packet_too_big_discard;
	u64 no_buff_discard;

	u64 rcv_ucast_bytes;
	u64 rcv_mcast_bytes;
	u64 rcv_bcast_bytes;
	u64 rcv_ucast_pkts;
	u64 rcv_mcast_pkts;
	u64 rcv_bcast_pkts;

	u64 sent_ucast_bytes;
	u64 sent_mcast_bytes;
	u64 sent_bcast_bytes;
	u64 sent_ucast_pkts;
	u64 sent_mcast_pkts;
	u64 sent_bcast_pkts;
	};

	struct qed_ll2_comp_rx_data {
	void *cookie;
	dma_addr_t rx_buf_addr;
	u16 parse_flags;
	u16 err_flags;
	u16 vlan;
	bool b_last_packet;
	u8 connection_handle;

	union {
	u16 packet_length;
	u16 data_length;
	} length;

	u32 opaque_data_0;
	u32 opaque_data_1;

	/* GSI only */
	u32 src_qp;
	u16 qp_id;

	union {
	u8 placement_offset;
	u8 data_length_error;
	} u;
	};

	typedef
	void (qed_ll2_complete_rx_packet_cb)(void cxt,
	struct qed_ll2_comp_rx_data *data);

	typedef
	void (qed_ll2_release_rx_packet_cb)(void cxt,
	u8 connection_handle,
	void *cookie,
	dma_addr_t rx_buf_addr,
	bool b_last_packet);

	typedef
	void (qed_ll2_complete_tx_packet_cb)(void cxt,
	u8 connection_handle,
	void *cookie,
	dma_addr_t first_frag_addr,
	bool b_last_fragment,
	bool b_last_packet);

	typedef
	void (qed_ll2_release_tx_packet_cb)(void cxt,
	u8 connection_handle,
	void *cookie,
	dma_addr_t first_frag_addr,
	bool b_last_fragment, bool b_last_packet);

	typedef
	void (qed_ll2_slowpath_cb)(void cxt, u8 connection_handle,
	u32 opaque_data_0, u32 opaque_data_1);

	struct qed_ll2_cbs {
	qed_ll2_complete_rx_packet_cb rx_comp_cb;
	qed_ll2_release_rx_packet_cb rx_release_cb;
	qed_ll2_complete_tx_packet_cb tx_comp_cb;
	qed_ll2_release_tx_packet_cb tx_release_cb;
	qed_ll2_slowpath_cb slowpath_cb;
	void *cookie;
	};

	struct qed_ll2_acquire_data_inputs {
	enum qed_ll2_rx_conn_type rx_conn_type;
	enum qed_ll2_conn_type conn_type;
	u16 mtu;
	u16 rx_num_desc;
	u16 rx_num_ooo_buffers;
	u8 rx_drop_ttl0_flg;
	u8 rx_vlan_removal_en;
	u16 tx_num_desc;
	u8 tx_max_bds_per_packet;
	u8 tx_tc;
	enum qed_ll2_tx_dest tx_dest;
	enum qed_ll2_error_handle ai_err_packet_too_big;
	enum qed_ll2_error_handle ai_err_no_buf;
	bool secondary_queue;
	u8 gsi_enable;
	};

	struct qed_ll2_acquire_data {
	struct qed_ll2_acquire_data_inputs input;
	const struct qed_ll2_cbs *cbs;

	/* Output container for LL2 connection's handle */
	u8 *p_connection_handle;
	};

	struct qed_ll2_tx_pkt_info {
	void *cookie;
	dma_addr_t first_frag;
	enum qed_ll2_tx_dest tx_dest;
	enum qed_ll2_roce_flavor_type qed_roce_flavor;
	u16 vlan;
	u16 l4_hdr_offset_w; /* from start of packet */
	u16 first_frag_len;
	u8 num_of_bds;
	u8 bd_flags;
	bool enable_ip_cksum;
	bool enable_l4_cksum;
	bool calc_ip_len;
	bool remove_stag;
	};

	#define QED_LL2_UNUSED_HANDLE (0xff)

	struct qed_ll2_cb_ops {
	int (rx_cb)(void , struct sk_buff *, u32, u32);
	int (tx_cb)(void , struct sk_buff *, bool);
	};

	struct qed_ll2_params {
	u16 mtu;
	bool drop_ttl0_packets;
	bool rx_vlan_stripping;
	u8 tx_tc;
	bool frags_mapped;
	u8 ll2_mac_address[ETH_ALEN];
	};

	enum qed_ll2_xmit_flags {
	/* FIP discovery packet */
	QED_LL2_XMIT_FLAGS_FIP_DISCOVERY
	};

	struct qed_ll2_ops {
	/**
	* @brief start - initializes ll2
	*
	* @param cdev
	* @param params - protocol driver configuration for the ll2.
	*
	* @return 0 on success, otherwise error value.
	*/
	int (start)(struct qed_dev cdev, struct qed_ll2_params *params);

	/**
	* @brief stop - stops the ll2
	*
	* @param cdev
	*
	* @return 0 on success, otherwise error value.
	*/
	int (stop)(struct qed_dev cdev);

	/**
	* @brief start_xmit - transmits an skb over the ll2 interface
	*
	* @param cdev
	* @param skb
	* @param xmit_flags - Transmit options defined by the enum qed_ll2_xmit_flags.
	*
	* @return 0 on success, otherwise error value.
	*/
	int (start_xmit)(struct qed_dev cdev, struct sk_buff *skb,
	unsigned long xmit_flags);

	/**
	* @brief register_cb_ops - protocol driver register the callback for Rx/Tx
	* packets. Should be called before `start'.
	*
	* @param cdev
	* @param cookie - to be passed to the callback functions.
	* @param ops - the callback functions to register for Rx / Tx.
	*
	* @return 0 on success, otherwise error value.
	*/
	void (register_cb_ops)(struct qed_dev cdev,
	const struct qed_ll2_cb_ops *ops,
	void *cookie);

	/**
	* @brief get LL2 related statistics
	*
	* @param cdev
	* @param stats - pointer to struct that would be filled with stats
	*
	* @return 0 on success, error otherwise.
	*/
	int (get_stats)(struct qed_dev cdev, struct qed_ll2_stats *stats);
	};

	#ifdef CONFIG_QED_LL2
	int qed_ll2_alloc_if(struct qed_dev *);
	void qed_ll2_dealloc_if(struct qed_dev *);
	#else
	static const struct qed_ll2_ops qed_ll2_ops_pass = {
	.start = NULL,
	.stop = NULL,
	.start_xmit = NULL,
	.register_cb_ops = NULL,
	.get_stats = NULL,
	};

	static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
	{
	return 0;
	}

	static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)
	{
	}
	#endif
	#endif