Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 105 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hfi1/netdev.h b/drivers/infiniband/hw/hfi1/netdev.h
new file mode 100644
index 0000000000..8aa074670a
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/netdev.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Copyright(c) 2020 Intel Corporation.
+ *
+ */
+
+#ifndef HFI1_NETDEV_H
+#define HFI1_NETDEV_H
+
+#include "hfi.h"
+
+#include <linux/netdevice.h>
+#include <linux/xarray.h>
+
+/**
+ * struct hfi1_netdev_rxq - Receive Queue for HFI
+ * Both IPoIB and VNIC netdevices will be working on the rx abstraction.
+ * @napi: napi object
+ * @rx: ptr to netdev_rx
+ * @rcd:  ptr to receive context data
+ */
+struct hfi1_netdev_rxq {
+	struct napi_struct napi;
+	struct hfi1_netdev_rx *rx;
+	struct hfi1_ctxtdata *rcd;
+};
+
+/*
+ * Number of netdev contexts used. Ensure it is less than or equal to
+ * max queues supported by VNIC (HFI1_VNIC_MAX_QUEUE).
+ */
+#define HFI1_MAX_NETDEV_CTXTS   8
+
+/* Number of NETDEV RSM entries */
+#define NUM_NETDEV_MAP_ENTRIES HFI1_MAX_NETDEV_CTXTS
+
+/**
+ * struct hfi1_netdev_rx: data required to setup and run HFI netdev.
+ * @rx_napi:	the dummy netdevice to support "polling" the receive contexts
+ * @dd:		hfi1_devdata
+ * @rxq:	pointer to dummy netdev receive queues.
+ * @num_rx_q:	number of receive queues
+ * @rmt_index:	first free index in RMT Array
+ * @msix_start: first free MSI-X interrupt vector.
+ * @dev_tbl:	netdev table for unique identifier VNIC and IPoIb VLANs.
+ * @enabled:	atomic counter of netdevs enabling receive queues.
+ *		When 0 NAPI will be disabled.
+ * @netdevs:	atomic counter of netdevs using dummy netdev.
+ *		When 0 receive queues will be freed.
+ */
+struct hfi1_netdev_rx {
+	struct net_device rx_napi;
+	struct hfi1_devdata *dd;
+	struct hfi1_netdev_rxq *rxq;
+	int num_rx_q;
+	int rmt_start;
+	struct xarray dev_tbl;
+	/* count of enabled napi polls */
+	atomic_t enabled;
+	/* count of netdevs on top */
+	atomic_t netdevs;
+};
+
+static inline
+int hfi1_netdev_ctxt_count(struct hfi1_devdata *dd)
+{
+	return dd->netdev_rx->num_rx_q;
+}
+
+static inline
+struct hfi1_ctxtdata *hfi1_netdev_get_ctxt(struct hfi1_devdata *dd, int ctxt)
+{
+	return dd->netdev_rx->rxq[ctxt].rcd;
+}
+
+static inline
+int hfi1_netdev_get_free_rmt_idx(struct hfi1_devdata *dd)
+{
+	return dd->netdev_rx->rmt_start;
+}
+
+static inline
+void hfi1_netdev_set_free_rmt_idx(struct hfi1_devdata *dd, int rmt_idx)
+{
+	dd->netdev_rx->rmt_start = rmt_idx;
+}
+
+u32 hfi1_num_netdev_contexts(struct hfi1_devdata *dd, u32 available_contexts,
+			     struct cpumask *cpu_mask);
+
+void hfi1_netdev_enable_queues(struct hfi1_devdata *dd);
+void hfi1_netdev_disable_queues(struct hfi1_devdata *dd);
+int hfi1_netdev_rx_init(struct hfi1_devdata *dd);
+int hfi1_netdev_rx_destroy(struct hfi1_devdata *dd);
+int hfi1_alloc_rx(struct hfi1_devdata *dd);
+void hfi1_free_rx(struct hfi1_devdata *dd);
+int hfi1_netdev_add_data(struct hfi1_devdata *dd, int id, void *data);
+void *hfi1_netdev_remove_data(struct hfi1_devdata *dd, int id);
+void *hfi1_netdev_get_data(struct hfi1_devdata *dd, int id);
+void *hfi1_netdev_get_first_data(struct hfi1_devdata *dd, int *start_id);
+
+/* chip.c  */
+int hfi1_netdev_rx_napi(struct napi_struct *napi, int budget);
+
+#endif /* HFI1_NETDEV_H */