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dwc_gmac_var.h revision 1.8 
      1 /* $NetBSD: dwc_gmac_var.h,v 1.8 2018/06/16 00:15:00 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 	kmutex_t			t_mtx;
     68 };
     69 
     70 struct dwc_gmac_rx_ring {
     71 	bus_addr_t			r_physaddr; /* PA of RX ring start */
     72 	struct dwc_gmac_dev_dmadesc	*r_desc;    /* VA of RX ring start */
     73 	struct dwc_gmac_rx_data	r_data[AWGE_RX_RING_COUNT];
     74 	int				r_cur, r_next;
     75 	kmutex_t			r_mtx;
     76 };
     77 
     78 struct dwc_gmac_softc {
     79 	device_t sc_dev;
     80 	bus_space_tag_t sc_bst;
     81 	bus_space_handle_t sc_bsh;
     82 	bus_dma_tag_t sc_dmat;
     83 	uint32_t sc_flags;
     84 #define	DWC_GMAC_FORCE_THRESH_DMA_MODE	0x01	/* force DMA to use threshold mode */
     85 	struct ethercom sc_ec;
     86 	struct mii_data sc_mii;
     87 	kmutex_t sc_mdio_lock;
     88 	bus_dmamap_t sc_dma_ring_map;		/* common dma memory for RX */
     89 	bus_dma_segment_t sc_dma_ring_seg;	/* and TX ring */
     90 	struct dwc_gmac_rx_ring sc_rxq;
     91 	struct dwc_gmac_tx_ring sc_txq;
     92 	short sc_if_flags;			/* shadow of ether flags */
     93 	uint16_t sc_mii_clk;
     94 	bool sc_stopping;
     95 
     96 	kmutex_t *sc_lock;			/* lock for softc operations */
     97 
     98 	struct if_percpuq *sc_ipq;		/* softint-based input queues */
     99 
    100 	void (*sc_set_speed)(struct dwc_gmac_softc *, int);
    101 };
    102 
    103 void dwc_gmac_attach(struct dwc_gmac_softc*, uint32_t /*mii_clk*/);
    104 int dwc_gmac_intr(struct dwc_gmac_softc*);
    105