espvar.h revision 1.13
1 /* $NetBSD: espvar.h,v 1.13 2002/07/11 16:03:10 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 struct esp_softc { 41 struct ncr53c9x_softc sc_ncr53c9x; /* glue to MI code */ 42 struct nextdma_config sc_scsi_dma; 43 bus_space_tag_t sc_bst; 44 bus_space_handle_t sc_bsh; /* the device registers */ 45 46 caddr_t *sc_dmaaddr; /* saved argument to esp_dma_setup */ 47 size_t *sc_dmalen; /* saved argument to esp_dma_setup */ 48 size_t sc_dmasize; /* saved argument to esp_dma_setup */ 49 int sc_datain; /* saved argument to esp_dma_setup */ 50 51 #define ESP_LOADED_MAIN (0x01) 52 #define ESP_LOADED_TAIL (0x02) 53 #define ESP_UNLOADED_MAIN (0x10) 54 #define ESP_UNLOADED_TAIL (0x20) 55 56 int sc_loaded; /* used by continue callback to remember 57 * which dmamaps are already loaded. 58 */ 59 60 /* To deal with begin alignment problems, we stuff the fifo 61 * with a begin buffer 62 */ 63 caddr_t sc_begin; /* pointer to start io buf, NULL if invalid */ 64 size_t sc_begin_size; /* */ 65 66 bus_dmamap_t sc_main_dmamap; /* i/o dma map */ 67 caddr_t sc_main; /* pointer to main io buf, NULL if invalid */ 68 size_t sc_main_size; /* aligned length of main io buf we are using */ 69 70 /* To deal with end alignment problems, we copy the end of the dma 71 * buffer into a "tail" buffer that we can control more carefully. 72 * We then chain this extra buffer onto the end. 73 */ 74 #define ESP_DMA_OVERRUN 0x30 /* 3*DMA_ENDALIGNMENT */ 75 #define ESP_DMA_MAXTAIL 128 76 #define ESP_DMA_TAILBUFSIZE (ESP_DMA_MAXTAIL+2*DMA_ENDALIGNMENT+ESP_DMA_OVERRUN) 77 bus_dmamap_t sc_tail_dmamap; 78 caddr_t sc_tail; /* pointer into sc_tailbuf, NULL if invalid */ 79 size_t sc_tail_size; /* aligned length of tailbuf we are using */ 80 u_char sc_tailbuf[ESP_DMA_TAILBUFSIZE]; 81 }; 82 83 #ifndef ESP_MAX_DMASIZE 84 #define ESP_MAX_DMASIZE MAX_DMASIZE 85 #endif 86
Indexes created Wed Sep 24 15:09:51 GMT 2025