/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */

#ifndef _IONIC_DEV_H_
#define _IONIC_DEV_H_

#include <linux/atomic.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/skbuff.h>
#include <linux/bpf_trace.h>

#include "ionic_if.h"
#include "ionic_regs.h"
#include "ionic_api.h"

#define IONIC_MAX_TX_DESC		8192
#define IONIC_MAX_RX_DESC		16384
#define IONIC_MIN_TXRX_DESC		64
#define IONIC_DEF_TXRX_DESC		1024
#define IONIC_RX_FILL_THRESHOLD		16
#define IONIC_RX_FILL_DIV		8
#define IONIC_TSO_DESCS_NEEDED		44 /* 64K TSO @1500B */
#define IONIC_LIFS_MAX			1024
#define IONIC_WATCHDOG_SECS		5
#define IONIC_ITR_COAL_USEC_DEFAULT	64

#define IONIC_DEV_CMD_REG_VERSION	1
#define IONIC_DEV_INFO_REG_COUNT	32
#define IONIC_DEV_CMD_REG_COUNT		32

#define IONIC_NAPI_DEADLINE		(HZ)		/* 1 sec */
#define IONIC_ADMIN_DOORBELL_DEADLINE	(HZ / 2)	/* 500ms */
#define IONIC_TX_DOORBELL_DEADLINE	(HZ / 100)	/* 10ms */
#define IONIC_RX_MIN_DOORBELL_DEADLINE	(HZ / 100)	/* 10ms */
#define IONIC_RX_MAX_DOORBELL_DEADLINE	(HZ * 4)	/* 4s */

#define IONIC_EXPDB_64B_WQE_LG2		6
#define IONIC_EXPDB_128B_WQE_LG2	7
#define IONIC_EXPDB_256B_WQE_LG2	8
#define IONIC_EXPDB_512B_WQE_LG2	9

struct ionic_dev_bar {
	void __iomem *vaddr;
	phys_addr_t bus_addr;
	unsigned long len;
	int res_index;
};

#ifndef __CHECKER__
/* Registers */
static_assert(sizeof(struct ionic_intr) == 32);

static_assert(sizeof(struct ionic_doorbell) == 8);
static_assert(sizeof(struct ionic_intr_status) == 8);
static_assert(sizeof(union ionic_dev_regs) == 4096);
static_assert(sizeof(union ionic_dev_info_regs) == 2048);
static_assert(sizeof(union ionic_dev_cmd_regs) == 2048);
static_assert(sizeof(struct ionic_lif_stats) == 1024);

static_assert(sizeof(struct ionic_admin_cmd) == 64);
static_assert(sizeof(struct ionic_admin_comp) == 16);
static_assert(sizeof(struct ionic_nop_cmd) == 64);
static_assert(sizeof(struct ionic_nop_comp) == 16);

/* Device commands */
static_assert(sizeof(struct ionic_dev_identify_cmd) == 64);
static_assert(sizeof(struct ionic_dev_identify_comp) == 16);
static_assert(sizeof(struct ionic_dev_init_cmd) == 64);
static_assert(sizeof(struct ionic_dev_init_comp) == 16);
static_assert(sizeof(struct ionic_dev_reset_cmd) == 64);
static_assert(sizeof(struct ionic_dev_reset_comp) == 16);
static_assert(sizeof(struct ionic_dev_getattr_cmd) == 64);
static_assert(sizeof(struct ionic_dev_getattr_comp) == 16);
static_assert(sizeof(struct ionic_dev_setattr_cmd) == 64);
static_assert(sizeof(struct ionic_dev_setattr_comp) == 16);
static_assert(sizeof(struct ionic_lif_setphc_cmd) == 64);

/* Port commands */
static_assert(sizeof(struct ionic_port_identify_cmd) == 64);
static_assert(sizeof(struct ionic_port_identify_comp) == 16);
static_assert(sizeof(struct ionic_port_init_cmd) == 64);
static_assert(sizeof(struct ionic_port_init_comp) == 16);
static_assert(sizeof(struct ionic_port_reset_cmd) == 64);
static_assert(sizeof(struct ionic_port_reset_comp) == 16);
static_assert(sizeof(struct ionic_port_getattr_cmd) == 64);
static_assert(sizeof(struct ionic_port_getattr_comp) == 16);
static_assert(sizeof(struct ionic_port_setattr_cmd) == 64);
static_assert(sizeof(struct ionic_port_setattr_comp) == 16);

/* LIF commands */
static_assert(sizeof(struct ionic_lif_init_cmd) == 64);
static_assert(sizeof(struct ionic_lif_init_comp) == 16);
static_assert(sizeof(struct ionic_lif_reset_cmd) == 64);
static_assert(sizeof(ionic_lif_reset_comp) == 16);
static_assert(sizeof(struct ionic_lif_getattr_cmd) == 64);
static_assert(sizeof(struct ionic_lif_getattr_comp) == 16);
static_assert(sizeof(struct ionic_lif_setattr_cmd) == 64);
static_assert(sizeof(struct ionic_lif_setattr_comp) == 16);

static_assert(sizeof(struct ionic_q_init_cmd) == 64);
static_assert(sizeof(struct ionic_q_init_comp) == 16);
static_assert(sizeof(struct ionic_q_control_cmd) == 64);
static_assert(sizeof(ionic_q_control_comp) == 16);
static_assert(sizeof(struct ionic_q_identify_cmd) == 64);
static_assert(sizeof(struct ionic_q_identify_comp) == 16);

static_assert(sizeof(struct ionic_rx_mode_set_cmd) == 64);
static_assert(sizeof(ionic_rx_mode_set_comp) == 16);
static_assert(sizeof(struct ionic_rx_filter_add_cmd) == 64);
static_assert(sizeof(struct ionic_rx_filter_add_comp) == 16);
static_assert(sizeof(struct ionic_rx_filter_del_cmd) == 64);
static_assert(sizeof(ionic_rx_filter_del_comp) == 16);

/* RDMA commands */
static_assert(sizeof(struct ionic_rdma_reset_cmd) == 64);
static_assert(sizeof(struct ionic_rdma_queue_cmd) == 64);

/* Events */
static_assert(sizeof(struct ionic_notifyq_cmd) == 4);
static_assert(sizeof(union ionic_notifyq_comp) == 64);
static_assert(sizeof(struct ionic_notifyq_event) == 64);
static_assert(sizeof(struct ionic_link_change_event) == 64);
static_assert(sizeof(struct ionic_reset_event) == 64);
static_assert(sizeof(struct ionic_heartbeat_event) == 64);
static_assert(sizeof(struct ionic_log_event) == 64);

/* I/O */
static_assert(sizeof(struct ionic_txq_desc) == 16);
static_assert(sizeof(struct ionic_txq_sg_desc) == 128);
static_assert(sizeof(struct ionic_txq_sg_desc_v1) == 256);
static_assert(sizeof(struct ionic_txq_comp) == 16);

static_assert(sizeof(struct ionic_rxq_desc) == 16);
static_assert(sizeof(struct ionic_rxq_sg_desc) == 128);
static_assert(sizeof(struct ionic_rxq_comp) == 16);
static_assert(sizeof(struct ionic_rxq_comp) == sizeof(struct ionic_txq_comp));

/* SR/IOV */
static_assert(sizeof(struct ionic_vf_setattr_cmd) == 64);
static_assert(sizeof(struct ionic_vf_setattr_comp) == 16);
static_assert(sizeof(struct ionic_vf_getattr_cmd) == 64);
static_assert(sizeof(struct ionic_vf_getattr_comp) == 16);
static_assert(sizeof(struct ionic_vf_ctrl_cmd) == 64);
static_assert(sizeof(struct ionic_vf_ctrl_comp) == 16);
#endif /* __CHECKER__ */

struct ionic_devinfo {
	u8 asic_type;
	u8 asic_rev;
	char fw_version[IONIC_DEVINFO_FWVERS_BUFLEN + 1];
	char serial_num[IONIC_DEVINFO_SERIAL_BUFLEN + 1];
};

struct ionic_dev {
	union ionic_dev_info_regs __iomem *dev_info_regs;
	union ionic_dev_cmd_regs __iomem *dev_cmd_regs;
	struct ionic_hwstamp_regs __iomem *hwstamp_regs;

	atomic_long_t last_check_time;
	unsigned long last_hb_time;
	u32 last_fw_hb;
	bool fw_hb_ready;
	bool fw_status_ready;
	u8 fw_generation;
	u8 opcode;

	u64 __iomem *db_pages;
	dma_addr_t phy_db_pages;

	struct ionic_intr __iomem *intr_ctrl;
	u64 __iomem *intr_status;

	struct mutex cmb_inuse_lock; /* for cmb_inuse */
	unsigned long *cmb_inuse;
	dma_addr_t phy_cmb_pages;
	u32 cmb_npages;

	dma_addr_t phy_cmb_expdb64_pages;
	dma_addr_t phy_cmb_expdb128_pages;
	dma_addr_t phy_cmb_expdb256_pages;
	dma_addr_t phy_cmb_expdb512_pages;

	u32 port_info_sz;
	struct ionic_port_info *port_info;
	dma_addr_t port_info_pa;

	struct ionic_devinfo dev_info;
};

struct ionic_queue;
struct ionic_qcq;

#define IONIC_MAX_BUF_LEN			((u16)-1)
#define IONIC_PAGE_SIZE				MIN(PAGE_SIZE, IONIC_MAX_BUF_LEN)

#define IONIC_XDP_MAX_LINEAR_MTU	(IONIC_PAGE_SIZE -	\
					 (VLAN_ETH_HLEN +	\
					  XDP_PACKET_HEADROOM +	\
					  SKB_DATA_ALIGN(sizeof(struct skb_shared_info))))

struct ionic_buf_info {
	struct page *page;
	dma_addr_t dma_addr;
	u32 page_offset;
	u32 len;
};

#define IONIC_TX_MAX_FRAGS			(1 + IONIC_TX_MAX_SG_ELEMS_V1)
#define IONIC_RX_MAX_FRAGS			(1 + IONIC_RX_MAX_SG_ELEMS)

struct ionic_tx_desc_info {
	unsigned int bytes;
	unsigned int nbufs;
	struct sk_buff *skb;
	struct xdp_frame *xdpf;
	enum xdp_action act;
	struct ionic_buf_info bufs[MAX_SKB_FRAGS + 1];
};

struct ionic_rx_desc_info {
	unsigned int nbufs;
	struct ionic_buf_info bufs[IONIC_RX_MAX_FRAGS];
};

struct ionic_admin_desc_info {
	void *ctx;
};

#define IONIC_QUEUE_NAME_MAX_SZ		16

struct ionic_queue {
	struct device *dev;
	struct ionic_lif *lif;
	union {
		void *info;
		struct ionic_tx_desc_info *tx_info;
		struct ionic_rx_desc_info *rx_info;
		struct ionic_admin_desc_info *admin_info;
	};
	u64 dbval;
	unsigned long dbell_deadline;
	unsigned long dbell_jiffies;
	u16 head_idx;
	u16 tail_idx;
	unsigned int index;
	unsigned int num_descs;
	unsigned int max_sg_elems;

	u64 features;
	unsigned int hw_type;
	bool xdp_flush;
	union {
		void *base;
		struct ionic_txq_desc *txq;
		struct ionic_rxq_desc *rxq;
		struct ionic_admin_cmd *adminq;
	};
	union {
		void *sg_base;
		struct ionic_txq_sg_desc *txq_sgl;
		struct ionic_txq_sg_desc_v1 *txq_sgl_v1;
		struct ionic_rxq_sg_desc *rxq_sgl;
	};
	struct xdp_rxq_info *xdp_rxq_info;
	struct bpf_prog *xdp_prog;
	struct page_pool *page_pool;
	struct ionic_queue *partner;

	union {
		void __iomem *cmb_base;
		struct ionic_txq_desc __iomem *cmb_txq;
		struct ionic_rxq_desc __iomem *cmb_rxq;
	};
	unsigned int type;
	unsigned int hw_index;
	dma_addr_t base_pa;
	dma_addr_t cmb_base_pa;
	dma_addr_t sg_base_pa;
	u64 drop;
	unsigned int desc_size;
	unsigned int sg_desc_size;
	unsigned int pid;
	char name[IONIC_QUEUE_NAME_MAX_SZ];
} ____cacheline_aligned_in_smp;

struct ionic_cq {
	struct ionic_lif *lif;
	struct ionic_queue *bound_q;
	struct ionic_intr_info *bound_intr;
	u16 tail_idx;
	bool done_color;
	unsigned int num_descs;
	unsigned int desc_size;
	void *base;
	dma_addr_t base_pa;
	struct ionic_dev *idev;
} ____cacheline_aligned_in_smp;

struct ionic;

static inline void ionic_intr_init(struct ionic_dev *idev,
				   struct ionic_intr_info *intr,
				   unsigned long index)
{
	ionic_intr_clean(idev->intr_ctrl, index);
	intr->index = index;
}

static inline unsigned int ionic_q_space_avail(struct ionic_queue *q)
{
	unsigned int avail = q->tail_idx;

	if (q->head_idx >= avail)
		avail += q->num_descs - q->head_idx - 1;
	else
		avail -= q->head_idx + 1;

	return avail;
}

static inline bool ionic_q_has_space(struct ionic_queue *q, unsigned int want)
{
	return ionic_q_space_avail(q) >= want;
}

void ionic_init_devinfo(struct ionic *ionic);
int ionic_dev_setup(struct ionic *ionic);
void ionic_dev_teardown(struct ionic *ionic);

void ionic_dev_cmd_go(struct ionic_dev *idev, union ionic_dev_cmd *cmd);
u8 ionic_dev_cmd_status(struct ionic_dev *idev);
bool ionic_dev_cmd_done(struct ionic_dev *idev);
void ionic_dev_cmd_comp(struct ionic_dev *idev, union ionic_dev_cmd_comp *comp);

void ionic_dev_cmd_identify(struct ionic_dev *idev, u8 ver);
void ionic_dev_cmd_init(struct ionic_dev *idev);
void ionic_dev_cmd_reset(struct ionic_dev *idev);

void ionic_dev_cmd_port_identify(struct ionic_dev *idev);
void ionic_dev_cmd_port_init(struct ionic_dev *idev);
void ionic_dev_cmd_port_reset(struct ionic_dev *idev);
void ionic_dev_cmd_port_state(struct ionic_dev *idev, u8 state);
void ionic_dev_cmd_port_speed(struct ionic_dev *idev, u32 speed);
void ionic_dev_cmd_port_autoneg(struct ionic_dev *idev, u8 an_enable);
void ionic_dev_cmd_port_fec(struct ionic_dev *idev, u8 fec_type);
void ionic_dev_cmd_port_pause(struct ionic_dev *idev, u8 pause_type);

int ionic_set_vf_config(struct ionic *ionic, int vf,
			struct ionic_vf_setattr_cmd *vfc);

void ionic_dev_cmd_queue_identify(struct ionic_dev *idev,
				  u16 lif_type, u8 qtype, u8 qver);
void ionic_vf_start(struct ionic *ionic);
void ionic_dev_cmd_lif_identify(struct ionic_dev *idev, u8 type, u8 ver);
void ionic_dev_cmd_lif_init(struct ionic_dev *idev, u16 lif_index,
			    dma_addr_t addr);
void ionic_dev_cmd_lif_reset(struct ionic_dev *idev, u16 lif_index);
void ionic_dev_cmd_adminq_init(struct ionic_dev *idev, struct ionic_qcq *qcq,
			       u16 lif_index, u16 intr_index);

int ionic_db_page_num(struct ionic_lif *lif, int pid);

void ionic_dev_cmd_discover_cmb(struct ionic_dev *idev);
void ionic_map_cmb(struct ionic *ionic);

int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
		  struct ionic_intr_info *intr,
		  unsigned int num_descs, size_t desc_size);
void ionic_cq_map(struct ionic_cq *cq, void *base, dma_addr_t base_pa);
void ionic_cq_bind(struct ionic_cq *cq, struct ionic_queue *q);
typedef bool (*ionic_cq_cb)(struct ionic_cq *cq);
typedef void (*ionic_cq_done_cb)(void *done_arg);
unsigned int ionic_cq_service(struct ionic_cq *cq, unsigned int work_to_do,
			      ionic_cq_cb cb, ionic_cq_done_cb done_cb,
			      void *done_arg);
unsigned int ionic_tx_cq_service(struct ionic_cq *cq,
				 unsigned int work_to_do,
				 bool in_napi);

int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
		 struct ionic_queue *q, unsigned int index, const char *name,
		 unsigned int num_descs, size_t desc_size,
		 size_t sg_desc_size, unsigned int pid);
void ionic_q_post(struct ionic_queue *q, bool ring_doorbell);
bool ionic_q_is_posted(struct ionic_queue *q, unsigned int pos);

int ionic_heartbeat_check(struct ionic *ionic);
bool ionic_is_fw_running(struct ionic_dev *idev);
void ionic_doorbell_napi_work(struct work_struct *work);
void ionic_queue_doorbell_check(struct ionic *ionic, int delay);

bool ionic_adminq_poke_doorbell(struct ionic_queue *q);
bool ionic_txq_poke_doorbell(struct ionic_queue *q);
bool ionic_rxq_poke_doorbell(struct ionic_queue *q);

#endif /* _IONIC_DEV_H_ */