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151 lines
3.7 KiB
151 lines
3.7 KiB
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ |
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/* |
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* Copyright(c) 2020 Intel Corporation. |
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* |
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*/ |
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/* |
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* This file contains HFI1 support for IPOIB functionality |
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*/ |
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#ifndef HFI1_IPOIB_H |
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#define HFI1_IPOIB_H |
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#include <linux/types.h> |
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#include <linux/stddef.h> |
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#include <linux/atomic.h> |
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#include <linux/netdevice.h> |
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#include <linux/slab.h> |
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#include <linux/skbuff.h> |
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#include <linux/list.h> |
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#include <linux/if_infiniband.h> |
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#include "hfi.h" |
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#include "iowait.h" |
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#include "netdev.h" |
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#include <rdma/ib_verbs.h> |
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#define HFI1_IPOIB_ENTROPY_SHIFT 24 |
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#define HFI1_IPOIB_TXREQ_NAME_LEN 32 |
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#define HFI1_IPOIB_PSEUDO_LEN 20 |
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#define HFI1_IPOIB_ENCAP_LEN 4 |
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struct hfi1_ipoib_dev_priv; |
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union hfi1_ipoib_flow { |
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u16 as_int; |
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struct { |
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u8 tx_queue; |
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u8 sc5; |
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} __attribute__((__packed__)); |
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}; |
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/** |
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* struct hfi1_ipoib_circ_buf - List of items to be processed |
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* @items: ring of items |
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* @head: ring head |
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* @tail: ring tail |
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* @max_items: max items + 1 that the ring can contain |
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* @producer_lock: producer sync lock |
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* @consumer_lock: consumer sync lock |
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*/ |
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struct ipoib_txreq; |
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struct hfi1_ipoib_circ_buf { |
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struct ipoib_txreq **items; |
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unsigned long head; |
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unsigned long tail; |
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unsigned long max_items; |
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spinlock_t producer_lock; /* head sync lock */ |
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spinlock_t consumer_lock; /* tail sync lock */ |
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}; |
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/** |
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* struct hfi1_ipoib_txq - IPOIB per Tx queue information |
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* @priv: private pointer |
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* @sde: sdma engine |
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* @tx_list: tx request list |
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* @sent_txreqs: count of txreqs posted to sdma |
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* @stops: count of stops of queue |
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* @ring_full: ring has been filled |
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* @no_desc: descriptor shortage seen |
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* @flow: tracks when list needs to be flushed for a flow change |
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* @q_idx: ipoib Tx queue index |
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* @pkts_sent: indicator packets have been sent from this queue |
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* @wait: iowait structure |
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* @complete_txreqs: count of txreqs completed by sdma |
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* @napi: pointer to tx napi interface |
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* @tx_ring: ring of ipoib txreqs to be reaped by napi callback |
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*/ |
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struct hfi1_ipoib_txq { |
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struct hfi1_ipoib_dev_priv *priv; |
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struct sdma_engine *sde; |
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struct list_head tx_list; |
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u64 sent_txreqs; |
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atomic_t stops; |
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atomic_t ring_full; |
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atomic_t no_desc; |
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union hfi1_ipoib_flow flow; |
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u8 q_idx; |
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bool pkts_sent; |
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struct iowait wait; |
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atomic64_t ____cacheline_aligned_in_smp complete_txreqs; |
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struct napi_struct *napi; |
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struct hfi1_ipoib_circ_buf tx_ring; |
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}; |
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struct hfi1_ipoib_dev_priv { |
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struct hfi1_devdata *dd; |
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struct net_device *netdev; |
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struct ib_device *device; |
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struct hfi1_ipoib_txq *txqs; |
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struct kmem_cache *txreq_cache; |
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struct napi_struct *tx_napis; |
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u16 pkey; |
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u16 pkey_index; |
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u32 qkey; |
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u8 port_num; |
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const struct net_device_ops *netdev_ops; |
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struct rvt_qp *qp; |
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}; |
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/* hfi1 ipoib rdma netdev's private data structure */ |
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struct hfi1_ipoib_rdma_netdev { |
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struct rdma_netdev rn; /* keep this first */ |
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/* followed by device private data */ |
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struct hfi1_ipoib_dev_priv dev_priv; |
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}; |
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static inline struct hfi1_ipoib_dev_priv * |
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hfi1_ipoib_priv(const struct net_device *dev) |
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{ |
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return &((struct hfi1_ipoib_rdma_netdev *)netdev_priv(dev))->dev_priv; |
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} |
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int hfi1_ipoib_send_dma(struct net_device *dev, |
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struct sk_buff *skb, |
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struct ib_ah *address, |
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u32 dqpn); |
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int hfi1_ipoib_txreq_init(struct hfi1_ipoib_dev_priv *priv); |
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void hfi1_ipoib_txreq_deinit(struct hfi1_ipoib_dev_priv *priv); |
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int hfi1_ipoib_rxq_init(struct net_device *dev); |
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void hfi1_ipoib_rxq_deinit(struct net_device *dev); |
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void hfi1_ipoib_napi_tx_enable(struct net_device *dev); |
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void hfi1_ipoib_napi_tx_disable(struct net_device *dev); |
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struct sk_buff *hfi1_ipoib_prepare_skb(struct hfi1_netdev_rxq *rxq, |
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int size, void *data); |
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int hfi1_ipoib_rn_get_params(struct ib_device *device, |
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u8 port_num, |
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enum rdma_netdev_t type, |
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struct rdma_netdev_alloc_params *params); |
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#endif /* _IPOIB_H */
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