42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/*
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* QEMU VMWARE paravirtual RDMA ring utilities
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*
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* Copyright (C) 2018 Oracle
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* Copyright (C) 2018 Red Hat Inc
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*
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* Authors:
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* Yuval Shaia <yuval.shaia@oracle.com>
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* Marcel Apfelbaum <marcel@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef PVRDMA_DEV_RING_H
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#define PVRDMA_DEV_RING_H
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#define MAX_RING_NAME_SZ 32
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typedef struct PvrdmaRing {
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char name[MAX_RING_NAME_SZ];
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PCIDevice *dev;
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uint32_t max_elems;
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size_t elem_sz;
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struct pvrdma_ring *ring_state; /* used only for unmap */
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int npages;
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void **pages;
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} PvrdmaRing;
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int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev,
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struct pvrdma_ring *ring_state, uint32_t max_elems,
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size_t elem_sz, dma_addr_t *tbl, uint32_t npages);
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void *pvrdma_ring_next_elem_read(PvrdmaRing *ring);
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void pvrdma_ring_read_inc(PvrdmaRing *ring);
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void *pvrdma_ring_next_elem_write(PvrdmaRing *ring);
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void pvrdma_ring_write_inc(PvrdmaRing *ring);
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void pvrdma_ring_free(PvrdmaRing *ring);
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#endif
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