diff options
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_ring.h')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_ring.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h new file mode 100644 index 000000000000..0ac3f9e7bee6 --- /dev/null +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h @@ -0,0 +1,157 @@ +/* + * aQuantia Corporation Network Driver + * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +/* File aq_ring.h: Declaration of functions for Rx/Tx rings. */ + +#ifndef AQ_RING_H +#define AQ_RING_H + +#include "aq_common.h" + +struct page; + +/* TxC SOP DX EOP + * +----------+----------+----------+----------- + * 8bytes|len l3,l4 | pa | pa | pa + * +----------+----------+----------+----------- + * 4/8bytes|len pkt |len pkt | | skb + * +----------+----------+----------+----------- + * 4/8bytes|is_txc |len,flags |len |len,is_eop + * +----------+----------+----------+----------- + * + * This aq_ring_buff_s doesn't have endianness dependency. + * It is __packed for cache line optimizations. + */ +struct __packed aq_ring_buff_s { + union { + /* RX */ + struct { + u32 rss_hash; + u16 next; + u8 is_hash_l4; + u8 rsvd1; + struct page *page; + }; + /* EOP */ + struct { + dma_addr_t pa_eop; + struct sk_buff *skb; + }; + /* DX */ + struct { + dma_addr_t pa; + }; + /* SOP */ + struct { + dma_addr_t pa_sop; + u32 len_pkt_sop; + }; + /* TxC */ + struct { + u32 mss; + u8 len_l2; + u8 len_l3; + u8 len_l4; + u8 rsvd2; + u32 len_pkt; + }; + }; + union { + struct { + u32 len:16; + u32 is_ip_cso:1; + u32 is_udp_cso:1; + u32 is_tcp_cso:1; + u32 is_cso_err:1; + u32 is_sop:1; + u32 is_eop:1; + u32 is_txc:1; + u32 is_mapped:1; + u32 is_cleaned:1; + u32 is_error:1; + u32 rsvd3:6; + }; + u32 flags; + }; +}; + +struct aq_ring_stats_rx_s { + u64 errors; + u64 packets; + u64 bytes; + u64 lro_packets; + u64 jumbo_packets; +}; + +struct aq_ring_stats_tx_s { + u64 errors; + u64 packets; + u64 bytes; +}; + +union aq_ring_stats_s { + struct aq_ring_stats_rx_s rx; + struct aq_ring_stats_tx_s tx; +}; + +struct aq_ring_s { + struct aq_obj_s header; + struct aq_ring_buff_s *buff_ring; + u8 *dx_ring; /* descriptors ring, dma shared mem */ + struct aq_nic_s *aq_nic; + unsigned int idx; /* for HW layer registers operations */ + unsigned int hw_head; + unsigned int sw_head; + unsigned int sw_tail; + unsigned int size; /* descriptors number */ + unsigned int dx_size; /* TX or RX descriptor size, */ + /* stored here for fater math */ + union aq_ring_stats_s stats; + dma_addr_t dx_ring_pa; +}; + +struct aq_ring_param_s { + unsigned int vec_idx; + unsigned int cpu; + cpumask_t affinity_mask; +}; + +static inline unsigned int aq_ring_next_dx(struct aq_ring_s *self, + unsigned int dx) +{ + return (++dx >= self->size) ? 0U : dx; +} + +static inline unsigned int aq_ring_avail_dx(struct aq_ring_s *self) +{ + return (((self->sw_tail >= self->sw_head)) ? + (self->size - 1) - self->sw_tail + self->sw_head : + self->sw_head - self->sw_tail - 1); +} + +struct aq_ring_s *aq_ring_tx_alloc(struct aq_ring_s *self, + struct aq_nic_s *aq_nic, + unsigned int idx, + struct aq_nic_cfg_s *aq_nic_cfg); +struct aq_ring_s *aq_ring_rx_alloc(struct aq_ring_s *self, + struct aq_nic_s *aq_nic, + unsigned int idx, + struct aq_nic_cfg_s *aq_nic_cfg); +int aq_ring_init(struct aq_ring_s *self); +void aq_ring_tx_deinit(struct aq_ring_s *self); +void aq_ring_rx_deinit(struct aq_ring_s *self); +void aq_ring_free(struct aq_ring_s *self); +void aq_ring_tx_append_buffs(struct aq_ring_s *ring, + struct aq_ring_buff_s *buffer, + unsigned int buffers); +int aq_ring_tx_clean(struct aq_ring_s *self); +int aq_ring_rx_clean(struct aq_ring_s *self, int *work_done, int budget); +int aq_ring_rx_fill(struct aq_ring_s *self); + +#endif /* AQ_RING_H */ |