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/* $OpenBSD: dwc_gmac_var.h,v 1.4 2017/05/21 11:52:04 kettenis Exp $ */
/* $NetBSD: dwc_gmac_var.h,v 1.6 2014/11/22 18:31:03 jmcneill Exp $ */
/*-
* Copyright (c) 2013, 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry and Martin Husemann.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* We could use 1024 DMA descriptors to fill up an 8k page (each is 16 byte).
* However, on TX we probably will not need that many, and on RX we allocate
* a full mbuf cluster for each, so secondary memory consumption will grow
* rapidly.
* So currently we waste half a page of dma memory and consume 512k Byte of
* RAM for mbuf clusters.
* XXX Maybe fine-tune later, or reconsider unsharing of RX/TX dmamap.
*/
#define DWGE_RX_RING_COUNT 256
#define DWGE_TX_RING_COUNT 256
#define DWGE_TOTAL_RING_COUNT \
(DWGE_RX_RING_COUNT + DWGE_TX_RING_COUNT)
#define DWGE_MAX_PACKET 0x7ff
struct dwc_gmac_rx_data {
bus_dmamap_t rd_map;
struct mbuf *rd_m;
};
struct dwc_gmac_tx_data {
bus_dmamap_t td_map;
bus_dmamap_t td_active;
struct mbuf *td_m;
};
struct dwc_gmac_tx_ring {
bus_addr_t t_physaddr; /* PA of TX ring start */
struct dwc_gmac_dev_dmadesc *t_desc; /* VA of TX ring start */
struct dwc_gmac_tx_data t_data[DWGE_TX_RING_COUNT];
int t_cur, t_next, t_queued;
};
struct dwc_gmac_rx_ring {
bus_addr_t r_physaddr; /* PA of RX ring start */
struct dwc_gmac_dev_dmadesc *r_desc; /* VA of RX ring start */
struct dwc_gmac_rx_data r_data[DWGE_RX_RING_COUNT];
int r_cur, r_next;
struct mutex r_mtx;
};
struct dwc_gmac_softc {
struct device sc_dev;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
bus_dma_tag_t sc_dmat;
struct arpcom sc_ac;
struct mii_data sc_mii;
struct mutex sc_mdio_lock;
bus_dmamap_t sc_dma_ring_map; /* common dma memory for RX */
bus_dma_segment_t sc_dma_ring_seg; /* and TX ring */
struct dwc_gmac_rx_ring sc_rxq;
struct dwc_gmac_tx_ring sc_txq;
uint16_t sc_mii_clk;
void (*sc_statchg)(struct device *);
};
void dwc_gmac_attach(struct dwc_gmac_softc*, uint32_t, int);
int dwc_gmac_intr(struct dwc_gmac_softc*);
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