drivers/net/ethernet/pensando/ionic/ionic_lif.h - linux/torvalds/linux - Git at Google

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

 #ifndef _IONIC_LIF_H_
 #define _IONIC_LIF_H_

 #include <linux/pci.h>
 #include "ionic_rx_filter.h"

 #define IONIC_ADMINQ_LENGTH	16	/* must be a power of two */
 #define IONIC_NOTIFYQ_LENGTH	64	/* must be a power of two */

 #define IONIC_MAX_NUM_NAPI_CNTR		(NAPI_POLL_WEIGHT + 1)
 #define IONIC_MAX_NUM_SG_CNTR		(IONIC_TX_MAX_SG_ELEMS + 1)
 #define IONIC_RX_COPYBREAK_DEFAULT	256

 struct ionic_tx_stats {
 	u64 dma_map_err;
 	u64 pkts;
 	u64 bytes;
 	u64 clean;
 	u64 linearize;
 	u64 no_csum;
 	u64 csum;
 	u64 crc32_csum;
 	u64 tso;
 	u64 frags;
 	u64 sg_cntr[IONIC_MAX_NUM_SG_CNTR];
 };

 struct ionic_rx_stats {
 	u64 dma_map_err;
 	u64 alloc_err;
 	u64 pkts;
 	u64 bytes;
 	u64 csum_none;
 	u64 csum_complete;
 	u64 csum_error;
 	u64 buffers_posted;
 	u64 dropped;
 };

 #define IONIC_QCQ_F_INITED		BIT(0)
 #define IONIC_QCQ_F_SG			BIT(1)
 #define IONIC_QCQ_F_INTR		BIT(2)
 #define IONIC_QCQ_F_TX_STATS		BIT(3)
 #define IONIC_QCQ_F_RX_STATS		BIT(4)
 #define IONIC_QCQ_F_NOTIFYQ		BIT(5)

 struct ionic_napi_stats {
 	u64 poll_count;
 	u64 work_done_cntr[IONIC_MAX_NUM_NAPI_CNTR];
 };

 struct ionic_q_stats {
 	union {
 		struct ionic_tx_stats tx;
 		struct ionic_rx_stats rx;
 	};
 };

 struct ionic_qcq {
 	void *base;
 	dma_addr_t base_pa;
 	unsigned int total_size;
 	struct ionic_queue q;
 	struct ionic_cq cq;
 	struct ionic_intr_info intr;
 	struct napi_struct napi;
 	struct ionic_napi_stats napi_stats;
 	struct ionic_q_stats *stats;
 	unsigned int flags;
 	struct dentry *dentry;
 };

 struct ionic_qcqst {
 	struct ionic_qcq *qcq;
 	struct ionic_q_stats *stats;
 };

 #define q_to_qcq(q)		container_of(q, struct ionic_qcq, q)
 #define q_to_tx_stats(q)	(&q_to_qcq(q)->stats->tx)
 #define q_to_rx_stats(q)	(&q_to_qcq(q)->stats->rx)
 #define napi_to_qcq(napi)	container_of(napi, struct ionic_qcq, napi)
 #define napi_to_cq(napi)	(&napi_to_qcq(napi)->cq)

 enum ionic_deferred_work_type {
 	IONIC_DW_TYPE_RX_MODE,
 	IONIC_DW_TYPE_RX_ADDR_ADD,
 	IONIC_DW_TYPE_RX_ADDR_DEL,
 	IONIC_DW_TYPE_LINK_STATUS,
 	IONIC_DW_TYPE_LIF_RESET,
 };

 struct ionic_deferred_work {
 	struct list_head list;
 	enum ionic_deferred_work_type type;
 	union {
 		unsigned int rx_mode;
 		u8 addr[ETH_ALEN];
 	};
 };

 struct ionic_deferred {
 	spinlock_t lock;		/* lock for deferred work list */
 	struct list_head list;
 	struct work_struct work;
 };

 struct ionic_lif_sw_stats {
 	u64 tx_packets;
 	u64 tx_bytes;
 	u64 rx_packets;
 	u64 rx_bytes;
 	u64 tx_tso;
 	u64 tx_no_csum;
 	u64 tx_csum;
 	u64 rx_csum_none;
 	u64 rx_csum_complete;
 	u64 rx_csum_error;
 };

 enum ionic_lif_state_flags {
 	IONIC_LIF_INITED,
 	IONIC_LIF_SW_DEBUG_STATS,
 	IONIC_LIF_UP,
 	IONIC_LIF_LINK_CHECK_REQUESTED,
 	IONIC_LIF_QUEUE_RESET,

 	/* leave this as last */
 	IONIC_LIF_STATE_SIZE
 };

 #define IONIC_LIF_NAME_MAX_SZ		32
 struct ionic_lif {
 	char name[IONIC_LIF_NAME_MAX_SZ];
 	struct list_head list;
 	struct net_device *netdev;
 	DECLARE_BITMAP(state, IONIC_LIF_STATE_SIZE);
 	struct ionic *ionic;
 	bool registered;
 	unsigned int index;
 	unsigned int hw_index;
 	unsigned int kern_pid;
 	u64 __iomem *kern_dbpage;
 	spinlock_t adminq_lock;		/* lock for AdminQ operations */
 	struct ionic_qcq *adminqcq;
 	struct ionic_qcq *notifyqcq;
 	struct ionic_qcqst *txqcqs;
 	struct ionic_qcqst *rxqcqs;
 	u64 last_eid;
 	unsigned int neqs;
 	unsigned int nxqs;
 	unsigned int ntxq_descs;
 	unsigned int nrxq_descs;
 	u32 rx_copybreak;
 	unsigned int rx_mode;
 	u64 hw_features;
 	bool mc_overflow;
 	unsigned int nmcast;
 	bool uc_overflow;
 	unsigned int nucast;

 	struct ionic_lif_info *info;
 	dma_addr_t info_pa;
 	u32 info_sz;

 	u16 rss_types;
 	u8 rss_hash_key[IONIC_RSS_HASH_KEY_SIZE];
 	u8 *rss_ind_tbl;
 	dma_addr_t rss_ind_tbl_pa;
 	u32 rss_ind_tbl_sz;

 	struct ionic_rx_filters rx_filters;
 	struct ionic_deferred deferred;
 	unsigned long *dbid_inuse;
 	unsigned int dbid_count;
 	struct dentry *dentry;
 	u32 rx_coalesce_usecs;		/* what the user asked for */
 	u32 rx_coalesce_hw;		/* what the hw is using */

 	u32 flags;
 	struct work_struct tx_timeout_work;
 };

 #define lif_to_txqcq(lif, i)	((lif)->txqcqs[i].qcq)
 #define lif_to_rxqcq(lif, i)	((lif)->rxqcqs[i].qcq)
 #define lif_to_txstats(lif, i)	((lif)->txqcqs[i].stats->tx)
 #define lif_to_rxstats(lif, i)	((lif)->rxqcqs[i].stats->rx)
 #define lif_to_txq(lif, i)	(&lif_to_txqcq((lif), i)->q)
 #define lif_to_rxq(lif, i)	(&lif_to_txqcq((lif), i)->q)

 /* return 0 if successfully set the bit, else non-zero */
 static inline int ionic_wait_for_bit(struct ionic_lif *lif, int bitname)
 {
 	return wait_on_bit_lock(lif->state, bitname, TASK_INTERRUPTIBLE);
 }

 static inline u32 ionic_coal_usec_to_hw(struct ionic *ionic, u32 usecs)
 {
 	u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult);
 	u32 div = le32_to_cpu(ionic->ident.dev.intr_coal_div);

 	/* Div-by-zero should never be an issue, but check anyway */
 	if (!div || !mult)
 		return 0;

 	/* Round up in case usecs is close to the next hw unit */
 	usecs += (div / mult) >> 1;

 	/* Convert from usecs to device units */
 	return (usecs * mult) / div;
 }

 static inline u32 ionic_coal_hw_to_usec(struct ionic *ionic, u32 units)
 {
 	u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult);
 	u32 div = le32_to_cpu(ionic->ident.dev.intr_coal_div);

 	/* Div-by-zero should never be an issue, but check anyway */
 	if (!div || !mult)
 		return 0;

 	/* Convert from device units to usec */
 	return (units * div) / mult;
 }

 int ionic_lifs_alloc(struct ionic *ionic);
 void ionic_lifs_free(struct ionic *ionic);
 void ionic_lifs_deinit(struct ionic *ionic);
 int ionic_lifs_init(struct ionic *ionic);
 int ionic_lifs_register(struct ionic *ionic);
 void ionic_lifs_unregister(struct ionic *ionic);
 int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
 		       union ionic_lif_identity *lif_ident);
 int ionic_lifs_size(struct ionic *ionic);
 int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 			 const u8 *key, const u32 *indir);

 int ionic_open(struct net_device *netdev);
 int ionic_stop(struct net_device *netdev);
 int ionic_reset_queues(struct ionic_lif *lif);

 static inline void debug_stats_txq_post(struct ionic_qcq *qcq,
 					struct ionic_txq_desc *desc, bool dbell)
 {
 	u8 num_sg_elems = ((le64_to_cpu(desc->cmd) >> IONIC_TXQ_DESC_NSGE_SHIFT)
 						& IONIC_TXQ_DESC_NSGE_MASK);

 	qcq->q.dbell_count += dbell;

 	if (num_sg_elems > (IONIC_MAX_NUM_SG_CNTR - 1))
 		num_sg_elems = IONIC_MAX_NUM_SG_CNTR - 1;

 	qcq->stats->tx.sg_cntr[num_sg_elems]++;
 }

 static inline void debug_stats_napi_poll(struct ionic_qcq *qcq,
 					 unsigned int work_done)
 {
 	qcq->napi_stats.poll_count++;

 	if (work_done > (IONIC_MAX_NUM_NAPI_CNTR - 1))
 		work_done = IONIC_MAX_NUM_NAPI_CNTR - 1;

 	qcq->napi_stats.work_done_cntr[work_done]++;
 }

 #define DEBUG_STATS_CQE_CNT(cq)		((cq)->compl_count++)
 #define DEBUG_STATS_RX_BUFF_CNT(qcq)	((qcq)->stats->rx.buffers_posted++)
 #define DEBUG_STATS_INTR_REARM(intr)	((intr)->rearm_count++)
 #define DEBUG_STATS_TXQ_POST(qcq, txdesc, dbell) \
 	debug_stats_txq_post(qcq, txdesc, dbell)
 #define DEBUG_STATS_NAPI_POLL(qcq, work_done) \
 	debug_stats_napi_poll(qcq, work_done)

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

	#ifndef _IONIC_LIF_H_
	#define _IONIC_LIF_H_

	#include <linux/pci.h>
	#include "ionic_rx_filter.h"

	#define IONIC_ADMINQ_LENGTH 16 /* must be a power of two */
	#define IONIC_NOTIFYQ_LENGTH 64 /* must be a power of two */

	#define IONIC_MAX_NUM_NAPI_CNTR (NAPI_POLL_WEIGHT + 1)
	#define IONIC_MAX_NUM_SG_CNTR (IONIC_TX_MAX_SG_ELEMS + 1)
	#define IONIC_RX_COPYBREAK_DEFAULT 256

	struct ionic_tx_stats {
	u64 dma_map_err;
	u64 pkts;
	u64 bytes;
	u64 clean;
	u64 linearize;
	u64 no_csum;
	u64 csum;
	u64 crc32_csum;
	u64 tso;
	u64 frags;
	u64 sg_cntr[IONIC_MAX_NUM_SG_CNTR];
	};

	struct ionic_rx_stats {
	u64 dma_map_err;
	u64 alloc_err;
	u64 pkts;
	u64 bytes;
	u64 csum_none;
	u64 csum_complete;
	u64 csum_error;
	u64 buffers_posted;
	u64 dropped;
	};

	#define IONIC_QCQ_F_INITED BIT(0)
	#define IONIC_QCQ_F_SG BIT(1)
	#define IONIC_QCQ_F_INTR BIT(2)
	#define IONIC_QCQ_F_TX_STATS BIT(3)
	#define IONIC_QCQ_F_RX_STATS BIT(4)
	#define IONIC_QCQ_F_NOTIFYQ BIT(5)

	struct ionic_napi_stats {
	u64 poll_count;
	u64 work_done_cntr[IONIC_MAX_NUM_NAPI_CNTR];
	};

	struct ionic_q_stats {
	union {
	struct ionic_tx_stats tx;
	struct ionic_rx_stats rx;
	};
	};

	struct ionic_qcq {
	void *base;
	dma_addr_t base_pa;
	unsigned int total_size;
	struct ionic_queue q;
	struct ionic_cq cq;
	struct ionic_intr_info intr;
	struct napi_struct napi;
	struct ionic_napi_stats napi_stats;
	struct ionic_q_stats *stats;
	unsigned int flags;
	struct dentry *dentry;
	};

	struct ionic_qcqst {
	struct ionic_qcq *qcq;
	struct ionic_q_stats *stats;
	};

	#define q_to_qcq(q) container_of(q, struct ionic_qcq, q)
	#define q_to_tx_stats(q) (&q_to_qcq(q)->stats->tx)
	#define q_to_rx_stats(q) (&q_to_qcq(q)->stats->rx)
	#define napi_to_qcq(napi) container_of(napi, struct ionic_qcq, napi)
	#define napi_to_cq(napi) (&napi_to_qcq(napi)->cq)

	enum ionic_deferred_work_type {
	IONIC_DW_TYPE_RX_MODE,
	IONIC_DW_TYPE_RX_ADDR_ADD,
	IONIC_DW_TYPE_RX_ADDR_DEL,
	IONIC_DW_TYPE_LINK_STATUS,
	IONIC_DW_TYPE_LIF_RESET,
	};

	struct ionic_deferred_work {
	struct list_head list;
	enum ionic_deferred_work_type type;
	union {
	unsigned int rx_mode;
	u8 addr[ETH_ALEN];
	};
	};

	struct ionic_deferred {
	spinlock_t lock; /* lock for deferred work list */
	struct list_head list;
	struct work_struct work;
	};

	struct ionic_lif_sw_stats {
	u64 tx_packets;
	u64 tx_bytes;
	u64 rx_packets;
	u64 rx_bytes;
	u64 tx_tso;
	u64 tx_no_csum;
	u64 tx_csum;
	u64 rx_csum_none;
	u64 rx_csum_complete;
	u64 rx_csum_error;
	};

	enum ionic_lif_state_flags {
	IONIC_LIF_INITED,
	IONIC_LIF_SW_DEBUG_STATS,
	IONIC_LIF_UP,
	IONIC_LIF_LINK_CHECK_REQUESTED,
	IONIC_LIF_QUEUE_RESET,

	/* leave this as last */
	IONIC_LIF_STATE_SIZE
	};

	#define IONIC_LIF_NAME_MAX_SZ 32
	struct ionic_lif {
	char name[IONIC_LIF_NAME_MAX_SZ];
	struct list_head list;
	struct net_device *netdev;
	DECLARE_BITMAP(state, IONIC_LIF_STATE_SIZE);
	struct ionic *ionic;
	bool registered;
	unsigned int index;
	unsigned int hw_index;
	unsigned int kern_pid;
	u64 __iomem *kern_dbpage;
	spinlock_t adminq_lock; /* lock for AdminQ operations */
	struct ionic_qcq *adminqcq;
	struct ionic_qcq *notifyqcq;
	struct ionic_qcqst *txqcqs;
	struct ionic_qcqst *rxqcqs;
	u64 last_eid;
	unsigned int neqs;
	unsigned int nxqs;
	unsigned int ntxq_descs;
	unsigned int nrxq_descs;
	u32 rx_copybreak;
	unsigned int rx_mode;
	u64 hw_features;
	bool mc_overflow;
	unsigned int nmcast;
	bool uc_overflow;
	unsigned int nucast;

	struct ionic_lif_info *info;
	dma_addr_t info_pa;
	u32 info_sz;

	u16 rss_types;
	u8 rss_hash_key[IONIC_RSS_HASH_KEY_SIZE];
	u8 *rss_ind_tbl;
	dma_addr_t rss_ind_tbl_pa;
	u32 rss_ind_tbl_sz;

	struct ionic_rx_filters rx_filters;
	struct ionic_deferred deferred;
	unsigned long *dbid_inuse;
	unsigned int dbid_count;
	struct dentry *dentry;
	u32 rx_coalesce_usecs; /* what the user asked for */
	u32 rx_coalesce_hw; /* what the hw is using */

	u32 flags;
	struct work_struct tx_timeout_work;
	};

	#define lif_to_txqcq(lif, i) ((lif)->txqcqs[i].qcq)
	#define lif_to_rxqcq(lif, i) ((lif)->rxqcqs[i].qcq)
	#define lif_to_txstats(lif, i) ((lif)->txqcqs[i].stats->tx)
	#define lif_to_rxstats(lif, i) ((lif)->rxqcqs[i].stats->rx)
	#define lif_to_txq(lif, i) (&lif_to_txqcq((lif), i)->q)
	#define lif_to_rxq(lif, i) (&lif_to_txqcq((lif), i)->q)

	/* return 0 if successfully set the bit, else non-zero */
	static inline int ionic_wait_for_bit(struct ionic_lif *lif, int bitname)
	{
	return wait_on_bit_lock(lif->state, bitname, TASK_INTERRUPTIBLE);
	}

	static inline u32 ionic_coal_usec_to_hw(struct ionic *ionic, u32 usecs)
	{
	u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult);
	u32 div = le32_to_cpu(ionic->ident.dev.intr_coal_div);

	/* Div-by-zero should never be an issue, but check anyway */
	if (!div \|\| !mult)
	return 0;

	/* Round up in case usecs is close to the next hw unit */
	usecs += (div / mult) >> 1;

	/* Convert from usecs to device units */
	return (usecs * mult) / div;
	}

	static inline u32 ionic_coal_hw_to_usec(struct ionic *ionic, u32 units)
	{
	u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult);
	u32 div = le32_to_cpu(ionic->ident.dev.intr_coal_div);

	/* Div-by-zero should never be an issue, but check anyway */
	if (!div \|\| !mult)
	return 0;

	/* Convert from device units to usec */
	return (units * div) / mult;
	}

	int ionic_lifs_alloc(struct ionic *ionic);
	void ionic_lifs_free(struct ionic *ionic);
	void ionic_lifs_deinit(struct ionic *ionic);
	int ionic_lifs_init(struct ionic *ionic);
	int ionic_lifs_register(struct ionic *ionic);
	void ionic_lifs_unregister(struct ionic *ionic);
	int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
	union ionic_lif_identity *lif_ident);
	int ionic_lifs_size(struct ionic *ionic);
	int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
	const u8 key, const u32 indir);

	int ionic_open(struct net_device *netdev);
	int ionic_stop(struct net_device *netdev);
	int ionic_reset_queues(struct ionic_lif *lif);

	static inline void debug_stats_txq_post(struct ionic_qcq *qcq,
	struct ionic_txq_desc *desc, bool dbell)
	{
	u8 num_sg_elems = ((le64_to_cpu(desc->cmd) >> IONIC_TXQ_DESC_NSGE_SHIFT)
	& IONIC_TXQ_DESC_NSGE_MASK);

	qcq->q.dbell_count += dbell;

	if (num_sg_elems > (IONIC_MAX_NUM_SG_CNTR - 1))
	num_sg_elems = IONIC_MAX_NUM_SG_CNTR - 1;

	qcq->stats->tx.sg_cntr[num_sg_elems]++;
	}

	static inline void debug_stats_napi_poll(struct ionic_qcq *qcq,
	unsigned int work_done)
	{
	qcq->napi_stats.poll_count++;

	if (work_done > (IONIC_MAX_NUM_NAPI_CNTR - 1))
	work_done = IONIC_MAX_NUM_NAPI_CNTR - 1;

	qcq->napi_stats.work_done_cntr[work_done]++;
	}

	#define DEBUG_STATS_CQE_CNT(cq) ((cq)->compl_count++)
	#define DEBUG_STATS_RX_BUFF_CNT(qcq) ((qcq)->stats->rx.buffers_posted++)
	#define DEBUG_STATS_INTR_REARM(intr) ((intr)->rearm_count++)
	#define DEBUG_STATS_TXQ_POST(qcq, txdesc, dbell) \
	debug_stats_txq_post(qcq, txdesc, dbell)
	#define DEBUG_STATS_NAPI_POLL(qcq, work_done) \
	debug_stats_napi_poll(qcq, work_done)

	#endif /* _IONIC_LIF_H_ */