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1/* SPDX-License-Identifier: GPL-2.0 */2/* Marvell Octeon EP (EndPoint) VF Ethernet Driver3 *4 * Copyright (C) 2020 Marvell.5 *6 */7 8#ifndef _OCTEP_VF_CONFIG_H_9#define _OCTEP_VF_CONFIG_H_10 11/* Tx instruction types by length */12#define OCTEP_VF_32BYTE_INSTR 3213#define OCTEP_VF_64BYTE_INSTR 6414 15/* Tx Queue: maximum descriptors per ring */16#define OCTEP_VF_IQ_MAX_DESCRIPTORS 102417/* Minimum input (Tx) requests to be enqueued to ring doorbell */18#define OCTEP_VF_DB_MIN 819/* Packet threshold for Tx queue interrupt */20#define OCTEP_VF_IQ_INTR_THRESHOLD 0x021 22/* Minimum watermark for backpressure */23#define OCTEP_VF_OQ_WMARK_MIN 25624 25/* Rx Queue: maximum descriptors per ring */26#define OCTEP_VF_OQ_MAX_DESCRIPTORS 102427 28/* Rx buffer size: Use page size buffers.29 * Build skb from allocated page buffer once the packet is received.30 * When a gathered packet is received, make head page as skb head and31 * page buffers in consecutive Rx descriptors as fragments.32 */33#define OCTEP_VF_OQ_BUF_SIZE (SKB_WITH_OVERHEAD(PAGE_SIZE))34#define OCTEP_VF_OQ_PKTS_PER_INTR 12835#define OCTEP_VF_OQ_REFILL_THRESHOLD (OCTEP_VF_OQ_MAX_DESCRIPTORS / 4)36 37#define OCTEP_VF_OQ_INTR_PKT_THRESHOLD 138#define OCTEP_VF_OQ_INTR_TIME_THRESHOLD 1039 40#define OCTEP_VF_MSIX_NAME_SIZE (IFNAMSIZ + 32)41 42/* Tx Queue wake threshold43 * wakeup a stopped Tx queue if minimum 2 descriptors are available.44 * Even a skb with fragments consume only one Tx queue descriptor entry.45 */46#define OCTEP_VF_WAKE_QUEUE_THRESHOLD 247 48/* Minimum MTU supported by Octeon network interface */49#define OCTEP_VF_MIN_MTU ETH_MIN_MTU50/* Maximum MTU supported by Octeon interface*/51#define OCTEP_VF_MAX_MTU (10000 - (ETH_HLEN + ETH_FCS_LEN))52/* Default MTU */53#define OCTEP_VF_DEFAULT_MTU 150054 55/* Macros to get octeon config params */56#define CFG_GET_IQ_CFG(cfg) ((cfg)->iq)57#define CFG_GET_IQ_NUM_DESC(cfg) ((cfg)->iq.num_descs)58#define CFG_GET_IQ_INSTR_TYPE(cfg) ((cfg)->iq.instr_type)59#define CFG_GET_IQ_INSTR_SIZE(cfg) (64)60#define CFG_GET_IQ_DB_MIN(cfg) ((cfg)->iq.db_min)61#define CFG_GET_IQ_INTR_THRESHOLD(cfg) ((cfg)->iq.intr_threshold)62 63#define CFG_GET_OQ_NUM_DESC(cfg) ((cfg)->oq.num_descs)64#define CFG_GET_OQ_BUF_SIZE(cfg) ((cfg)->oq.buf_size)65#define CFG_GET_OQ_REFILL_THRESHOLD(cfg) ((cfg)->oq.refill_threshold)66#define CFG_GET_OQ_INTR_PKT(cfg) ((cfg)->oq.oq_intr_pkt)67#define CFG_GET_OQ_INTR_TIME(cfg) ((cfg)->oq.oq_intr_time)68#define CFG_GET_OQ_WMARK(cfg) ((cfg)->oq.wmark)69 70#define CFG_GET_PORTS_ACTIVE_IO_RINGS(cfg) ((cfg)->ring_cfg.active_io_rings)71#define CFG_GET_PORTS_MAX_IO_RINGS(cfg) ((cfg)->ring_cfg.max_io_rings)72 73#define CFG_GET_CORE_TICS_PER_US(cfg) ((cfg)->core_cfg.core_tics_per_us)74#define CFG_GET_COPROC_TICS_PER_US(cfg) ((cfg)->core_cfg.coproc_tics_per_us)75 76#define CFG_GET_IOQ_MSIX(cfg) ((cfg)->msix_cfg.ioq_msix)77 78/* Hardware Tx Queue configuration. */79struct octep_vf_iq_config {80 /* Size of the Input queue (number of commands) */81 u16 num_descs;82 83 /* Command size - 32 or 64 bytes */84 u16 instr_type;85 86 /* Minimum number of commands pending to be posted to Octeon before driver87 * hits the Input queue doorbell.88 */89 u16 db_min;90 91 /* Trigger the IQ interrupt when processed cmd count reaches92 * this level.93 */94 u32 intr_threshold;95};96 97/* Hardware Rx Queue configuration. */98struct octep_vf_oq_config {99 /* Size of Output queue (number of descriptors) */100 u16 num_descs;101 102 /* Size of buffer in this Output queue. */103 u16 buf_size;104 105 /* The number of buffers that were consumed during packet processing106 * by the driver on this Output queue before the driver attempts to107 * replenish the descriptor ring with new buffers.108 */109 u16 refill_threshold;110 111 /* Interrupt Coalescing (Packet Count). Octeon will interrupt the host112 * only if it sent as many packets as specified by this field.113 * The driver usually does not use packet count interrupt coalescing.114 */115 u32 oq_intr_pkt;116 117 /* Interrupt Coalescing (Time Interval). Octeon will interrupt the host118 * if at least one packet was sent in the time interval specified by119 * this field. The driver uses time interval interrupt coalescing by120 * default. The time is specified in microseconds.121 */122 u32 oq_intr_time;123 124 /* Water mark for backpressure.125 * Output queue sends backpressure signal to source when126 * free buffer count falls below wmark.127 */128 u32 wmark;129};130 131/* Tx/Rx configuration */132struct octep_vf_ring_config {133 /* Max number of IOQs */134 u16 max_io_rings;135 136 /* Number of active IOQs */137 u16 active_io_rings;138};139 140/* Octeon MSI-x config. */141struct octep_vf_msix_config {142 /* Number of IOQ interrupts */143 u16 ioq_msix;144};145 146/* Data Structure to hold configuration limits and active config */147struct octep_vf_config {148 /* Input Queue attributes. */149 struct octep_vf_iq_config iq;150 151 /* Output Queue attributes. */152 struct octep_vf_oq_config oq;153 154 /* MSI-X interrupt config */155 struct octep_vf_msix_config msix_cfg;156 157 /* NIC VF ring Configuration */158 struct octep_vf_ring_config ring_cfg;159};160#endif /* _OCTEP_VF_CONFIG_H_ */161