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/* SPDX-License-Identifier: GPL-2.0 */
/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
*
* Copyright (C) 2020 Marvell.
*
*/
#ifndef _OCTEP_VF_CONFIG_H_
#define _OCTEP_VF_CONFIG_H_
/* Tx instruction types by length */
#define OCTEP_VF_32BYTE_INSTR 32
#define OCTEP_VF_64BYTE_INSTR 64
/* Tx Queue: maximum descriptors per ring */
#define OCTEP_VF_IQ_MAX_DESCRIPTORS 1024
/* Minimum input (Tx) requests to be enqueued to ring doorbell */
#define OCTEP_VF_DB_MIN 8
/* Packet threshold for Tx queue interrupt */
#define OCTEP_VF_IQ_INTR_THRESHOLD 0x0
/* Minimum watermark for backpressure */
#define OCTEP_VF_OQ_WMARK_MIN 256
/* Rx Queue: maximum descriptors per ring */
#define OCTEP_VF_OQ_MAX_DESCRIPTORS 1024
/* Rx buffer size: Use page size buffers.
* Build skb from allocated page buffer once the packet is received.
* When a gathered packet is received, make head page as skb head and
* page buffers in consecutive Rx descriptors as fragments.
*/
#define OCTEP_VF_OQ_BUF_SIZE (SKB_WITH_OVERHEAD(PAGE_SIZE))
#define OCTEP_VF_OQ_PKTS_PER_INTR 128
#define OCTEP_VF_OQ_REFILL_THRESHOLD (OCTEP_VF_OQ_MAX_DESCRIPTORS / 4)
#define OCTEP_VF_OQ_INTR_PKT_THRESHOLD 1
#define OCTEP_VF_OQ_INTR_TIME_THRESHOLD 10
#define OCTEP_VF_MSIX_NAME_SIZE (IFNAMSIZ + 32)
/* Tx Queue wake threshold
* wakeup a stopped Tx queue if minimum 2 descriptors are available.
* Even a skb with fragments consume only one Tx queue descriptor entry.
*/
#define OCTEP_VF_WAKE_QUEUE_THRESHOLD 2
/* Minimum MTU supported by Octeon network interface */
#define OCTEP_VF_MIN_MTU ETH_MIN_MTU
/* Maximum MTU supported by Octeon interface*/
#define OCTEP_VF_MAX_MTU (10000 - (ETH_HLEN + ETH_FCS_LEN))
/* Default MTU */
#define OCTEP_VF_DEFAULT_MTU 1500
/* Macros to get octeon config params */
#define CFG_GET_IQ_CFG(cfg) ((cfg)->iq)
#define CFG_GET_IQ_NUM_DESC(cfg) ((cfg)->iq.num_descs)
#define CFG_GET_IQ_INSTR_TYPE(cfg) ((cfg)->iq.instr_type)
#define CFG_GET_IQ_INSTR_SIZE(cfg) (64)
#define CFG_GET_IQ_DB_MIN(cfg) ((cfg)->iq.db_min)
#define CFG_GET_IQ_INTR_THRESHOLD(cfg) ((cfg)->iq.intr_threshold)
#define CFG_GET_OQ_NUM_DESC(cfg) ((cfg)->oq.num_descs)
#define CFG_GET_OQ_BUF_SIZE(cfg) ((cfg)->oq.buf_size)
#define CFG_GET_OQ_REFILL_THRESHOLD(cfg) ((cfg)->oq.refill_threshold)
#define CFG_GET_OQ_INTR_PKT(cfg) ((cfg)->oq.oq_intr_pkt)
#define CFG_GET_OQ_INTR_TIME(cfg) ((cfg)->oq.oq_intr_time)
#define CFG_GET_OQ_WMARK(cfg) ((cfg)->oq.wmark)
#define CFG_GET_PORTS_ACTIVE_IO_RINGS(cfg) ((cfg)->ring_cfg.active_io_rings)
#define CFG_GET_PORTS_MAX_IO_RINGS(cfg) ((cfg)->ring_cfg.max_io_rings)
#define CFG_GET_CORE_TICS_PER_US(cfg) ((cfg)->core_cfg.core_tics_per_us)
#define CFG_GET_COPROC_TICS_PER_US(cfg) ((cfg)->core_cfg.coproc_tics_per_us)
#define CFG_GET_IOQ_MSIX(cfg) ((cfg)->msix_cfg.ioq_msix)
/* Hardware Tx Queue configuration. */
struct octep_vf_iq_config {
/* Size of the Input queue (number of commands) */
u16 num_descs;
/* Command size - 32 or 64 bytes */
u16 instr_type;
/* Minimum number of commands pending to be posted to Octeon before driver
* hits the Input queue doorbell.
*/
u16 db_min;
/* Trigger the IQ interrupt when processed cmd count reaches
* this level.
*/
u32 intr_threshold;
};
/* Hardware Rx Queue configuration. */
struct octep_vf_oq_config {
/* Size of Output queue (number of descriptors) */
u16 num_descs;
/* Size of buffer in this Output queue. */
u16 buf_size;
/* The number of buffers that were consumed during packet processing
* by the driver on this Output queue before the driver attempts to
* replenish the descriptor ring with new buffers.
*/
u16 refill_threshold;
/* Interrupt Coalescing (Packet Count). Octeon will interrupt the host
* only if it sent as many packets as specified by this field.
* The driver usually does not use packet count interrupt coalescing.
*/
u32 oq_intr_pkt;
/* Interrupt Coalescing (Time Interval). Octeon will interrupt the host
* if at least one packet was sent in the time interval specified by
* this field. The driver uses time interval interrupt coalescing by
* default. The time is specified in microseconds.
*/
u32 oq_intr_time;
/* Water mark for backpressure.
* Output queue sends backpressure signal to source when
* free buffer count falls below wmark.
*/
u32 wmark;
};
/* Tx/Rx configuration */
struct octep_vf_ring_config {
/* Max number of IOQs */
u16 max_io_rings;
/* Number of active IOQs */
u16 active_io_rings;
};
/* Octeon MSI-x config. */
struct octep_vf_msix_config {
/* Number of IOQ interrupts */
u16 ioq_msix;
};
/* Data Structure to hold configuration limits and active config */
struct octep_vf_config {
/* Input Queue attributes. */
struct octep_vf_iq_config iq;
/* Output Queue attributes. */
struct octep_vf_oq_config oq;
/* MSI-X interrupt config */
struct octep_vf_msix_config msix_cfg;
/* NIC VF ring Configuration */
struct octep_vf_ring_config ring_cfg;
};
#endif /* _OCTEP_VF_CONFIG_H_ */
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