1 /* $NetBSD: dwc_gmac_var.h,v 1.6 2014/11/22 18:31:03 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2013, 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry and Martin Husemann. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 33 /* 34 * We could use 1024 DMA descriptors to fill up an 8k page (each is 16 byte). 35 * However, on TX we probably will not need that many, and on RX we allocate 36 * a full mbuf cluster for each, so secondary memory consumption will grow 37 * rapidly. 38 * So currently we waste half a page of dma memory and consume 512k Byte of 39 * RAM for mbuf clusters. 40 * XXX Maybe fine-tune later, or reconsider unsharing of RX/TX dmamap. 41 */ 42 #define AWGE_RX_RING_COUNT 256 43 #define AWGE_TX_RING_COUNT 256 44 #define AWGE_TOTAL_RING_COUNT \ 45 (AWGE_RX_RING_COUNT + AWGE_TX_RING_COUNT) 46 47 #define AWGE_MAX_PACKET 0x7ff 48 49 50 51 struct dwc_gmac_rx_data { 52 bus_dmamap_t rd_map; 53 struct mbuf *rd_m; 54 }; 55 56 struct dwc_gmac_tx_data { 57 bus_dmamap_t td_map; 58 bus_dmamap_t td_active; 59 struct mbuf *td_m; 60 }; 61 62 struct dwc_gmac_tx_ring { 63 bus_addr_t t_physaddr; /* PA of TX ring start */ 64 struct dwc_gmac_dev_dmadesc *t_desc; /* VA of TX ring start */ 65 struct dwc_gmac_tx_data t_data[AWGE_TX_RING_COUNT]; 66 int t_cur, t_next, t_queued; 67 }; 68 69 struct dwc_gmac_rx_ring { 70 bus_addr_t r_physaddr; /* PA of RX ring start */ 71 struct dwc_gmac_dev_dmadesc *r_desc; /* VA of RX ring start */ 72 struct dwc_gmac_rx_data r_data[AWGE_RX_RING_COUNT]; 73 int r_cur, r_next; 74 kmutex_t r_mtx; 75 }; 76 77 struct dwc_gmac_softc { 78 device_t sc_dev; 79 bus_space_tag_t sc_bst; 80 bus_space_handle_t sc_bsh; 81 bus_dma_tag_t sc_dmat; 82 struct ethercom sc_ec; 83 struct mii_data sc_mii; 84 kmutex_t sc_mdio_lock; 85 bus_dmamap_t sc_dma_ring_map; /* common dma memory for RX */ 86 bus_dma_segment_t sc_dma_ring_seg; /* and TX ring */ 87 struct dwc_gmac_rx_ring sc_rxq; 88 struct dwc_gmac_tx_ring sc_txq; 89 short sc_if_flags; /* shadow of ether flags */ 90 uint16_t sc_mii_clk; 91 }; 92 93 void dwc_gmac_attach(struct dwc_gmac_softc*, uint32_t /*mii_clk*/); 94 int dwc_gmac_intr(struct dwc_gmac_softc*); 95