82 lines
3.6 KiB
C
82 lines
3.6 KiB
C
/* $NetBSD: espvar.h,v 1.12 2001/09/14 18:29:08 jdolecek Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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struct esp_softc {
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struct ncr53c9x_softc sc_ncr53c9x; /* glue to MI code */
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struct nextdma_config sc_scsi_dma;
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bus_space_tag_t sc_bst;
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bus_space_handle_t sc_bsh; /* the device registers */
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caddr_t *sc_dmaaddr; /* saved argument to esp_dma_setup */
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size_t *sc_dmalen; /* saved argument to esp_dma_setup */
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size_t sc_dmasize; /* saved argument to esp_dma_setup */
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int sc_datain; /* saved argument to esp_dma_setup */
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#define ESP_LOADED_MAIN (0x01)
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#define ESP_LOADED_TAIL (0x02)
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#define ESP_UNLOADED_MAIN (0x10)
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#define ESP_UNLOADED_TAIL (0x20)
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int sc_loaded; /* used by continue callback to remember
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* which dmamaps are already loaded.
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*/
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/* To deal with begin alignment problems, we stuff the fifo
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* with a begin buffer
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*/
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caddr_t sc_begin; /* pointer to start io buf, NULL if invalid */
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size_t sc_begin_size; /* */
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bus_dmamap_t sc_main_dmamap; /* i/o dma map */
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caddr_t sc_main; /* pointer to main io buf, NULL if invalid */
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size_t sc_main_size; /* aligned length of main io buf we are using */
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/* To deal with end alignment problems, we copy the end of the dma
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* buffer into a "tail" buffer that we can control more carefully.
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* We then chain this extra buffer onto the end.
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*/
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#define ESP_DMA_OVERRUN 0x30 /* 3*DMA_ENDALIGNMENT */
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#define ESP_DMA_MAXTAIL 128
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#define ESP_DMA_TAILBUFSIZE (ESP_DMA_MAXTAIL+2*DMA_ENDALIGNMENT+ESP_DMA_OVERRUN)
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bus_dmamap_t sc_tail_dmamap;
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caddr_t sc_tail; /* pointer into sc_tailbuf, NULL if invalid */
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size_t sc_tail_size; /* aligned length of tailbuf we are using */
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u_char sc_tailbuf[ESP_DMA_TAILBUFSIZE];
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};
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