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/* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2016-2018 Solarflare Communications Inc.
* All rights reserved.
*
* This software was jointly developed between OKTET Labs (under contract
* for Solarflare) and Solarflare Communications, Inc.
*/
#ifndef _SFC_DP_TX_H
#define _SFC_DP_TX_H
#include <rte_ethdev_driver.h>
#include "sfc_dp.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generic transmit queue information used on data path.
* It must be kept as small as it is possible since it is built into
* the structure used on datapath.
*/
struct sfc_dp_txq {
struct sfc_dp_queue dpq;
};
/**
* Datapath transmit queue creation information.
*
* The structure is used just to pass information from control path to
* datapath. It could be just function arguments, but it would be hardly
* readable.
*/
struct sfc_dp_tx_qcreate_info {
/** Maximum number of pushed Tx descriptors */
unsigned int max_fill_level;
/** Minimum number of unused Tx descriptors to do reap */
unsigned int free_thresh;
/** Offloads enabled on the transmit queue */
uint64_t offloads;
/** Tx queue size */
unsigned int txq_entries;
/** Maximum size of data in the DMA descriptor */
uint16_t dma_desc_size_max;
/** DMA-mapped Tx descriptors ring */
void *txq_hw_ring;
/** Associated event queue size */
unsigned int evq_entries;
/** Hardware event ring */
void *evq_hw_ring;
/** The queue index in hardware (required to push right doorbell) */
unsigned int hw_index;
/** Virtual address of the memory-mapped BAR to push Tx doorbell */
volatile void *mem_bar;
/** VI window size shift */
unsigned int vi_window_shift;
/**
* Maximum number of bytes into the packet the TCP header can start for
* the hardware to apply TSO packet edits.
*/
uint16_t tso_tcp_header_offset_limit;
};
/**
* Get Tx datapath specific device info.
*
* @param dev_info Device info to be adjusted
*/
typedef void (sfc_dp_tx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
/**
* Get size of transmit and event queue rings by the number of Tx
* descriptors.
*
* @param nb_tx_desc Number of Tx descriptors
* @param txq_entries Location for number of Tx ring entries
* @param evq_entries Location for number of event ring entries
* @param txq_max_fill_level Location for maximum Tx ring fill level
*
* @return 0 or positive errno.
*/
typedef int (sfc_dp_tx_qsize_up_rings_t)(uint16_t nb_tx_desc,
unsigned int *txq_entries,
unsigned int *evq_entries,
unsigned int *txq_max_fill_level);
/**
* Allocate and initialize datapath transmit queue.
*
* @param port_id The port identifier
* @param queue_id The queue identifier
* @param pci_addr PCI function address
* @param socket_id Socket identifier to allocate memory
* @param info Tx queue details wrapped in structure
* @param dp_txqp Location for generic datapath transmit queue pointer
*
* @return 0 or positive errno.
*/
typedef int (sfc_dp_tx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
const struct rte_pci_addr *pci_addr,
int socket_id,
const struct sfc_dp_tx_qcreate_info *info,
struct sfc_dp_txq **dp_txqp);
/**
* Free resources allocated for datapath transmit queue.
*/
typedef void (sfc_dp_tx_qdestroy_t)(struct sfc_dp_txq *dp_txq);
/**
* Transmit queue start callback.
*
* It handovers EvQ to the datapath.
*/
typedef int (sfc_dp_tx_qstart_t)(struct sfc_dp_txq *dp_txq,
unsigned int evq_read_ptr,
unsigned int txq_desc_index);
/**
* Transmit queue stop function called before the queue flush.
*
* It returns EvQ to the control path.
*/
typedef void (sfc_dp_tx_qstop_t)(struct sfc_dp_txq *dp_txq,
unsigned int *evq_read_ptr);
/**
* Transmit event handler used during queue flush only.
*/
typedef bool (sfc_dp_tx_qtx_ev_t)(struct sfc_dp_txq *dp_txq, unsigned int id);
/**
* Transmit queue function called after the queue flush.
*/
typedef void (sfc_dp_tx_qreap_t)(struct sfc_dp_txq *dp_txq);
/**
* Check Tx descriptor status
*/
typedef int (sfc_dp_tx_qdesc_status_t)(struct sfc_dp_txq *dp_txq,
uint16_t offset);
/** Transmit datapath definition */
struct sfc_dp_tx {
struct sfc_dp dp;
unsigned int features;
#define SFC_DP_TX_FEAT_VLAN_INSERT 0x1
#define SFC_DP_TX_FEAT_TSO 0x2
#define SFC_DP_TX_FEAT_MULTI_SEG 0x4
#define SFC_DP_TX_FEAT_MULTI_PROCESS 0x8
#define SFC_DP_TX_FEAT_MULTI_POOL 0x10
#define SFC_DP_TX_FEAT_REFCNT 0x20
sfc_dp_tx_get_dev_info_t *get_dev_info;
sfc_dp_tx_qsize_up_rings_t *qsize_up_rings;
sfc_dp_tx_qcreate_t *qcreate;
sfc_dp_tx_qdestroy_t *qdestroy;
sfc_dp_tx_qstart_t *qstart;
sfc_dp_tx_qstop_t *qstop;
sfc_dp_tx_qtx_ev_t *qtx_ev;
sfc_dp_tx_qreap_t *qreap;
sfc_dp_tx_qdesc_status_t *qdesc_status;
eth_tx_burst_t pkt_burst;
};
static inline struct sfc_dp_tx *
sfc_dp_find_tx_by_name(struct sfc_dp_list *head, const char *name)
{
struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_TX, name);
return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
}
static inline struct sfc_dp_tx *
sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
{
struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_TX, avail_caps);
return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
}
extern struct sfc_dp_tx sfc_efx_tx;
extern struct sfc_dp_tx sfc_ef10_tx;
extern struct sfc_dp_tx sfc_ef10_simple_tx;
#ifdef __cplusplus
}
#endif
#endif /* _SFC_DP_TX_H */
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