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/* SPDX-License-Identifier: GPL-2.0 */
/* Marvell OcteonTx2 RVU Ethernet driver
*
* Copyright (C) 2020 Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef OTX2_TXRX_H
#define OTX2_TXRX_H
#include <linux/etherdevice.h>
#include <linux/iommu.h>
#include <linux/if_vlan.h>
#define LBK_CHAN_BASE 0x000
#define SDP_CHAN_BASE 0x700
#define CGX_CHAN_BASE 0x800
#define OTX2_DATA_ALIGN(X) ALIGN(X, OTX2_ALIGN)
#define OTX2_HEAD_ROOM OTX2_ALIGN
#define OTX2_ETH_HLEN (VLAN_ETH_HLEN + VLAN_HLEN)
#define OTX2_MIN_MTU 64
#define OTX2_MAX_MTU (9212 - OTX2_ETH_HLEN)
#define OTX2_MAX_GSO_SEGS 255
#define OTX2_MAX_FRAGS_IN_SQE 9
/* Rx buffer size should be in multiples of 128bytes */
#define RCV_FRAG_LEN1(x) \
((OTX2_HEAD_ROOM + OTX2_DATA_ALIGN(x)) + \
OTX2_DATA_ALIGN(sizeof(struct skb_shared_info)))
/* Prefer 2048 byte buffers for better last level cache
* utilization or data distribution across regions.
*/
#define RCV_FRAG_LEN(x) \
((RCV_FRAG_LEN1(x) < 2048) ? 2048 : RCV_FRAG_LEN1(x))
#define DMA_BUFFER_LEN(x) \
((x) - OTX2_HEAD_ROOM - \
OTX2_DATA_ALIGN(sizeof(struct skb_shared_info)))
/* IRQ triggered when NIX_LF_CINTX_CNT[ECOUNT]
* is equal to this value.
*/
#define CQ_CQE_THRESH_DEFAULT 10
/* IRQ triggered when NIX_LF_CINTX_CNT[ECOUNT]
* is nonzero and this much time elapses after that.
*/
#define CQ_TIMER_THRESH_DEFAULT 1 /* 1 usec */
#define CQ_TIMER_THRESH_MAX 25 /* 25 usec */
/* Min number of CQs (of the ones mapped to this CINT)
* with valid CQEs.
*/
#define CQ_QCOUNT_DEFAULT 1
struct queue_stats {
u64 bytes;
u64 pkts;
};
struct otx2_rcv_queue {
struct queue_stats stats;
};
struct sg_list {
u16 num_segs;
u64 skb;
u64 size[OTX2_MAX_FRAGS_IN_SQE];
u64 dma_addr[OTX2_MAX_FRAGS_IN_SQE];
};
struct otx2_snd_queue {
u8 aura_id;
u16 head;
u16 sqe_size;
u32 sqe_cnt;
u16 num_sqbs;
u16 sqe_thresh;
u8 sqe_per_sqb;
u64 io_addr;
u64 *aura_fc_addr;
u64 *lmt_addr;
void *sqe_base;
struct qmem *sqe;
struct qmem *tso_hdrs;
struct sg_list *sg;
struct queue_stats stats;
u16 sqb_count;
u64 *sqb_ptrs;
} ____cacheline_aligned_in_smp;
enum cq_type {
CQ_RX,
CQ_TX,
CQS_PER_CINT = 2, /* RQ + SQ */
};
struct otx2_cq_poll {
void *dev;
#define CINT_INVALID_CQ 255
u8 cint_idx;
u8 cq_ids[CQS_PER_CINT];
struct napi_struct napi;
};
struct otx2_pool {
struct qmem *stack;
struct qmem *fc_addr;
u8 rbpage_order;
u16 rbsize;
u32 page_offset;
u16 pageref;
struct page *page;
};
struct otx2_cq_queue {
u8 cq_idx;
u8 cq_type;
u8 cint_idx; /* CQ interrupt id */
u8 refill_task_sched;
u16 cqe_size;
u16 pool_ptrs;
u32 cqe_cnt;
u32 cq_head;
void *cqe_base;
struct qmem *cqe;
struct otx2_pool *rbpool;
} ____cacheline_aligned_in_smp;
struct otx2_qset {
u32 rqe_cnt;
u32 sqe_cnt; /* Keep these two at top */
#define OTX2_MAX_CQ_CNT 64
u16 cq_cnt;
u16 xqe_size;
struct otx2_pool *pool;
struct otx2_cq_poll *napi;
struct otx2_cq_queue *cq;
struct otx2_snd_queue *sq;
struct otx2_rcv_queue *rq;
};
/* Translate IOVA to physical address */
static inline u64 otx2_iova_to_phys(void *iommu_domain, dma_addr_t dma_addr)
{
/* Translation is installed only when IOMMU is present */
if (likely(iommu_domain))
return iommu_iova_to_phys(iommu_domain, dma_addr);
return dma_addr;
}
int otx2_napi_handler(struct napi_struct *napi, int budget);
bool otx2_sq_append_skb(struct net_device *netdev, struct otx2_snd_queue *sq,
struct sk_buff *skb, u16 qidx);
#endif /* OTX2_TXRX_H */
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