/* $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*);