54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
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/*
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* QEMU rocker switch emulation - Descriptor ring support
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*
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* Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _ROCKER_DESC_H_
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#define _ROCKER_DESC_H_
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#include "rocker_hw.h"
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typedef int (desc_ring_consume)(Rocker *r, DescInfo *info);
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uint16_t desc_buf_size(DescInfo *info);
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uint16_t desc_tlv_size(DescInfo *info);
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char *desc_get_buf(DescInfo *info, bool read_only);
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int desc_set_buf(DescInfo *info, size_t tlv_size);
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DescRing *desc_get_ring(DescInfo *info);
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int desc_ring_index(DescRing *ring);
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bool desc_ring_set_base_addr(DescRing *ring, uint64_t base_addr);
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uint64_t desc_ring_get_base_addr(DescRing *ring);
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bool desc_ring_set_size(DescRing *ring, uint32_t size);
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uint32_t desc_ring_get_size(DescRing *ring);
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bool desc_ring_set_head(DescRing *ring, uint32_t new);
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uint32_t desc_ring_get_head(DescRing *ring);
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uint32_t desc_ring_get_tail(DescRing *ring);
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void desc_ring_set_ctrl(DescRing *ring, uint32_t val);
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bool desc_ring_ret_credits(DescRing *ring, uint32_t credits);
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uint32_t desc_ring_get_credits(DescRing *ring);
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DescInfo *desc_ring_fetch_desc(DescRing *ring);
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bool desc_ring_post_desc(DescRing *ring, int status);
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void desc_ring_set_consume(DescRing *ring, desc_ring_consume *consume,
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unsigned vector);
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unsigned desc_ring_get_msix_vector(DescRing *ring);
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DescRing *desc_ring_alloc(Rocker *r, int index);
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void desc_ring_free(DescRing *ring);
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void desc_ring_reset(DescRing *ring);
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#endif
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