Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 */