diff options
Diffstat (limited to 'hw/rdma/vmw/pvrdma_dev_ring.h')
| -rw-r--r-- | hw/rdma/vmw/pvrdma_dev_ring.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/hw/rdma/vmw/pvrdma_dev_ring.h b/hw/rdma/vmw/pvrdma_dev_ring.h new file mode 100644 index 000000000..d231588ce --- /dev/null +++ b/hw/rdma/vmw/pvrdma_dev_ring.h @@ -0,0 +1,46 @@ +/* + * QEMU VMWARE paravirtual RDMA ring utilities + * + * Copyright (C) 2018 Oracle + * Copyright (C) 2018 Red Hat Inc + * + * Authors: + * Yuval Shaia <yuval.shaia@oracle.com> + * Marcel Apfelbaum <marcel@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef PVRDMA_DEV_RING_H +#define PVRDMA_DEV_RING_H + + +#define MAX_RING_NAME_SZ 32 + +typedef struct PvrdmaRingState { + int prod_tail; /* producer tail */ + int cons_head; /* consumer head */ +} PvrdmaRingState; + +typedef struct PvrdmaRing { + char name[MAX_RING_NAME_SZ]; + PCIDevice *dev; + uint32_t max_elems; + size_t elem_sz; + PvrdmaRingState *ring_state; /* used only for unmap */ + int npages; + void **pages; +} PvrdmaRing; + +int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev, + PvrdmaRingState *ring_state, uint32_t max_elems, + size_t elem_sz, dma_addr_t *tbl, uint32_t npages); +void *pvrdma_ring_next_elem_read(PvrdmaRing *ring); +void pvrdma_ring_read_inc(PvrdmaRing *ring); +void *pvrdma_ring_next_elem_write(PvrdmaRing *ring); +void pvrdma_ring_write_inc(PvrdmaRing *ring); +void pvrdma_ring_free(PvrdmaRing *ring); + +#endif |