164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
/*
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* aQuantia Corporation Network Driver
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* Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*/
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/* File aq_ring.h: Declaration of functions for Rx/Tx rings. */
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#ifndef AQ_RING_H
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#define AQ_RING_H
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#include "aq_common.h"
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struct page;
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struct aq_nic_cfg_s;
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/* TxC SOP DX EOP
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* +----------+----------+----------+-----------
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* 8bytes|len l3,l4 | pa | pa | pa
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* +----------+----------+----------+-----------
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* 4/8bytes|len pkt |len pkt | | skb
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* +----------+----------+----------+-----------
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* 4/8bytes|is_txc |len,flags |len |len,is_eop
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* +----------+----------+----------+-----------
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*
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* This aq_ring_buff_s doesn't have endianness dependency.
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* It is __packed for cache line optimizations.
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*/
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struct __packed aq_ring_buff_s {
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union {
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/* RX */
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struct {
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u32 rss_hash;
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u16 next;
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u8 is_hash_l4;
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u8 rsvd1;
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struct page *page;
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};
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/* EOP */
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struct {
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dma_addr_t pa_eop;
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struct sk_buff *skb;
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};
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/* DX */
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struct {
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dma_addr_t pa;
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};
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/* SOP */
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struct {
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dma_addr_t pa_sop;
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u32 len_pkt_sop;
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};
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/* TxC */
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struct {
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u32 mss;
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u8 len_l2;
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u8 len_l3;
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u8 len_l4;
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u8 is_ipv6:1;
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u8 rsvd2:7;
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u32 len_pkt;
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};
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};
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union {
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struct {
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u16 len;
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u32 is_ip_cso:1;
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u32 is_udp_cso:1;
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u32 is_tcp_cso:1;
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u32 is_cso_err:1;
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u32 is_sop:1;
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u32 is_eop:1;
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u32 is_txc:1;
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u32 is_mapped:1;
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u32 is_cleaned:1;
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u32 is_error:1;
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u32 rsvd3:6;
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u16 eop_index;
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u16 rsvd4;
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};
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u64 flags;
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};
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};
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struct aq_ring_stats_rx_s {
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u64 errors;
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u64 packets;
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u64 bytes;
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u64 lro_packets;
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u64 jumbo_packets;
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};
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struct aq_ring_stats_tx_s {
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u64 errors;
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u64 packets;
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u64 bytes;
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u64 queue_restarts;
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};
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union aq_ring_stats_s {
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struct aq_ring_stats_rx_s rx;
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struct aq_ring_stats_tx_s tx;
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};
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struct aq_ring_s {
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struct aq_ring_buff_s *buff_ring;
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u8 *dx_ring; /* descriptors ring, dma shared mem */
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struct aq_nic_s *aq_nic;
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unsigned int idx; /* for HW layer registers operations */
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unsigned int hw_head;
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unsigned int sw_head;
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unsigned int sw_tail;
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unsigned int size; /* descriptors number */
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unsigned int dx_size; /* TX or RX descriptor size, */
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/* stored here for fater math */
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union aq_ring_stats_s stats;
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dma_addr_t dx_ring_pa;
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};
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struct aq_ring_param_s {
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unsigned int vec_idx;
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unsigned int cpu;
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cpumask_t affinity_mask;
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};
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static inline unsigned int aq_ring_next_dx(struct aq_ring_s *self,
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unsigned int dx)
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{
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return (++dx >= self->size) ? 0U : dx;
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}
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static inline unsigned int aq_ring_avail_dx(struct aq_ring_s *self)
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{
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return (((self->sw_tail >= self->sw_head)) ?
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(self->size - 1) - self->sw_tail + self->sw_head :
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self->sw_head - self->sw_tail - 1);
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}
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struct aq_ring_s *aq_ring_tx_alloc(struct aq_ring_s *self,
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struct aq_nic_s *aq_nic,
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unsigned int idx,
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struct aq_nic_cfg_s *aq_nic_cfg);
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struct aq_ring_s *aq_ring_rx_alloc(struct aq_ring_s *self,
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struct aq_nic_s *aq_nic,
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unsigned int idx,
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struct aq_nic_cfg_s *aq_nic_cfg);
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int aq_ring_init(struct aq_ring_s *self);
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void aq_ring_rx_deinit(struct aq_ring_s *self);
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void aq_ring_free(struct aq_ring_s *self);
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void aq_ring_update_queue_state(struct aq_ring_s *ring);
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void aq_ring_queue_wake(struct aq_ring_s *ring);
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void aq_ring_queue_stop(struct aq_ring_s *ring);
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bool aq_ring_tx_clean(struct aq_ring_s *self);
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int aq_ring_rx_clean(struct aq_ring_s *self,
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struct napi_struct *napi,
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int *work_done,
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int budget);
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int aq_ring_rx_fill(struct aq_ring_s *self);
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#endif /* AQ_RING_H */
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