Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Alexander Duyck | 423 | 100.00% | 9 | 100.00% |
Total | 423 | 9 |
/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (c) Meta Platforms, Inc. and affiliates. */ #ifndef _FBNIC_TXRX_H_ #define _FBNIC_TXRX_H_ #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/types.h> #include <net/xdp.h> struct fbnic_net; /* Guarantee we have space needed for storing the buffer * To store the buffer we need: * 1 descriptor per page * + 1 descriptor for skb head * + 2 descriptors for metadata and optional metadata * + 7 descriptors to keep tail out of the same cacheline as head * If we cannot guarantee that then we should return TX_BUSY */ #define FBNIC_MAX_SKB_DESC (MAX_SKB_FRAGS + 10) #define FBNIC_TX_DESC_WAKEUP (FBNIC_MAX_SKB_DESC * 2) #define FBNIC_TX_DESC_MIN roundup_pow_of_two(FBNIC_TX_DESC_WAKEUP) #define FBNIC_MAX_TXQS 128u #define FBNIC_MAX_RXQS 128u #define FBNIC_TXQ_SIZE_DEFAULT 1024 #define FBNIC_HPQ_SIZE_DEFAULT 256 #define FBNIC_PPQ_SIZE_DEFAULT 256 #define FBNIC_RCQ_SIZE_DEFAULT 1024 #define FBNIC_RX_TROOM \ SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) #define FBNIC_RX_HROOM \ (ALIGN(FBNIC_RX_TROOM + NET_SKB_PAD, 128) - FBNIC_RX_TROOM) #define FBNIC_RX_PAD 0 #define FBNIC_RX_MAX_HDR (1536 - FBNIC_RX_PAD) #define FBNIC_RX_PAYLD_OFFSET 0 #define FBNIC_RX_PAYLD_PG_CL 0 #define FBNIC_RING_F_DISABLED BIT(0) #define FBNIC_RING_F_CTX BIT(1) #define FBNIC_RING_F_STATS BIT(2) /* Ring's stats may be used */ struct fbnic_pkt_buff { struct xdp_buff buff; u32 data_truesize; u16 data_len; u16 nr_frags; }; /* Pagecnt bias is long max to reserve the last bit to catch overflow * cases where if we overcharge the bias it will flip over to be negative. */ #define PAGECNT_BIAS_MAX LONG_MAX struct fbnic_rx_buf { struct page *page; long pagecnt_bias; }; struct fbnic_ring { /* Pointer to buffer specific info */ union { struct fbnic_pkt_buff *pkt; /* RCQ */ struct fbnic_rx_buf *rx_buf; /* BDQ */ void **tx_buf; /* TWQ */ void *buffer; /* Generic pointer */ }; u32 __iomem *doorbell; /* Pointer to CSR space for ring */ __le64 *desc; /* Descriptor ring memory */ u16 size_mask; /* Size of ring in descriptors - 1 */ u8 q_idx; /* Logical netdev ring index */ u8 flags; /* Ring flags (FBNIC_RING_F_*) */ u32 head, tail; /* Head/Tail of ring */ /* Slow path fields follow */ dma_addr_t dma; /* Phys addr of descriptor memory */ size_t size; /* Size of descriptor ring in memory */ }; struct fbnic_q_triad { struct fbnic_ring sub0, sub1, cmpl; }; struct fbnic_napi_vector { struct napi_struct napi; struct device *dev; /* Device for DMA unmapping */ struct page_pool *page_pool; struct fbnic_dev *fbd; char name[IFNAMSIZ + 9]; u16 v_idx; u8 txt_count; u8 rxt_count; struct list_head napis; struct fbnic_q_triad qt[]; }; #define FBNIC_MAX_TXQS 128u #define FBNIC_MAX_RXQS 128u netdev_tx_t fbnic_xmit_frame(struct sk_buff *skb, struct net_device *dev); netdev_features_t fbnic_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features); int fbnic_alloc_napi_vectors(struct fbnic_net *fbn); void fbnic_free_napi_vectors(struct fbnic_net *fbn); int fbnic_alloc_resources(struct fbnic_net *fbn); void fbnic_free_resources(struct fbnic_net *fbn); void fbnic_napi_enable(struct fbnic_net *fbn); void fbnic_napi_disable(struct fbnic_net *fbn); void fbnic_enable(struct fbnic_net *fbn); void fbnic_disable(struct fbnic_net *fbn); void fbnic_flush(struct fbnic_net *fbn); void fbnic_fill(struct fbnic_net *fbn); void fbnic_napi_depletion_check(struct net_device *netdev); int fbnic_wait_all_queues_idle(struct fbnic_dev *fbd, bool may_fail); #endif /* _FBNIC_TXRX_H_ */
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