diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/ipoib.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/ipoib.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/ipoib.h b/drivers/infiniband/hw/hfi1/ipoib.h new file mode 100644 index 000000000..aec60d488 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/ipoib.h @@ -0,0 +1,171 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ +/* + * Copyright(c) 2020 Intel Corporation. + * + */ + +/* + * This file contains HFI1 support for IPOIB functionality + */ + +#ifndef HFI1_IPOIB_H +#define HFI1_IPOIB_H + +#include <linux/types.h> +#include <linux/stddef.h> +#include <linux/atomic.h> +#include <linux/netdevice.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/list.h> +#include <linux/if_infiniband.h> + +#include "hfi.h" +#include "iowait.h" +#include "netdev.h" + +#include <rdma/ib_verbs.h> + +#define HFI1_IPOIB_ENTROPY_SHIFT 24 + +#define HFI1_IPOIB_TXREQ_NAME_LEN 32 + +#define HFI1_IPOIB_PSEUDO_LEN 20 +#define HFI1_IPOIB_ENCAP_LEN 4 + +struct hfi1_ipoib_dev_priv; + +union hfi1_ipoib_flow { + u16 as_int; + struct { + u8 tx_queue; + u8 sc5; + } __attribute__((__packed__)); +}; + +/** + * struct ipoib_txreq - IPOIB transmit descriptor + * @txreq: sdma transmit request + * @sdma_hdr: 9b ib headers + * @sdma_status: status returned by sdma engine + * @complete: non-zero implies complete + * @priv: ipoib netdev private data + * @txq: txq on which skb was output + * @skb: skb to send + */ +struct ipoib_txreq { + struct sdma_txreq txreq; + struct hfi1_sdma_header *sdma_hdr; + int sdma_status; + int complete; + struct hfi1_ipoib_dev_priv *priv; + struct hfi1_ipoib_txq *txq; + struct sk_buff *skb; +}; + +/** + * struct hfi1_ipoib_circ_buf - List of items to be processed + * @items: ring of items each a power of two size + * @max_items: max items + 1 that the ring can contain + * @shift: log2 of size for getting txreq + * @sent_txreqs: count of txreqs posted to sdma + * @tail: ring tail + * @stops: count of stops of queue + * @ring_full: ring has been filled + * @no_desc: descriptor shortage seen + * @complete_txreqs: count of txreqs completed by sdma + * @head: ring head + */ +struct hfi1_ipoib_circ_buf { + void *items; + u32 max_items; + u32 shift; + /* consumer cache line */ + u64 ____cacheline_aligned_in_smp sent_txreqs; + u32 avail; + u32 tail; + atomic_t stops; + atomic_t ring_full; + atomic_t no_desc; + /* producer cache line */ + u64 ____cacheline_aligned_in_smp complete_txreqs; + u32 head; +}; + +/** + * struct hfi1_ipoib_txq - IPOIB per Tx queue information + * @priv: private pointer + * @sde: sdma engine + * @tx_list: tx request list + * @sent_txreqs: count of txreqs posted to sdma + * @flow: tracks when list needs to be flushed for a flow change + * @q_idx: ipoib Tx queue index + * @pkts_sent: indicator packets have been sent from this queue + * @wait: iowait structure + * @napi: pointer to tx napi interface + * @tx_ring: ring of ipoib txreqs to be reaped by napi callback + */ +struct hfi1_ipoib_txq { + struct napi_struct napi; + struct hfi1_ipoib_dev_priv *priv; + struct sdma_engine *sde; + struct list_head tx_list; + union hfi1_ipoib_flow flow; + u8 q_idx; + bool pkts_sent; + struct iowait wait; + + struct hfi1_ipoib_circ_buf ____cacheline_aligned_in_smp tx_ring; +}; + +struct hfi1_ipoib_dev_priv { + struct hfi1_devdata *dd; + struct net_device *netdev; + struct ib_device *device; + struct hfi1_ipoib_txq *txqs; + const struct net_device_ops *netdev_ops; + struct rvt_qp *qp; + u32 qkey; + u16 pkey; + u16 pkey_index; + u8 port_num; +}; + +/* hfi1 ipoib rdma netdev's private data structure */ +struct hfi1_ipoib_rdma_netdev { + struct rdma_netdev rn; /* keep this first */ + /* followed by device private data */ + struct hfi1_ipoib_dev_priv dev_priv; +}; + +static inline struct hfi1_ipoib_dev_priv * +hfi1_ipoib_priv(const struct net_device *dev) +{ + return &((struct hfi1_ipoib_rdma_netdev *)netdev_priv(dev))->dev_priv; +} + +int hfi1_ipoib_send(struct net_device *dev, + struct sk_buff *skb, + struct ib_ah *address, + u32 dqpn); + +int hfi1_ipoib_txreq_init(struct hfi1_ipoib_dev_priv *priv); +void hfi1_ipoib_txreq_deinit(struct hfi1_ipoib_dev_priv *priv); + +int hfi1_ipoib_rxq_init(struct net_device *dev); +void hfi1_ipoib_rxq_deinit(struct net_device *dev); + +void hfi1_ipoib_napi_tx_enable(struct net_device *dev); +void hfi1_ipoib_napi_tx_disable(struct net_device *dev); + +struct sk_buff *hfi1_ipoib_prepare_skb(struct hfi1_netdev_rxq *rxq, + int size, void *data); + +int hfi1_ipoib_rn_get_params(struct ib_device *device, + u32 port_num, + enum rdma_netdev_t type, + struct rdma_netdev_alloc_params *params); + +void hfi1_ipoib_tx_timeout(struct net_device *dev, unsigned int q); + +#endif /* _IPOIB_H */ |