d88cf589cb
isa_dmamap_create() calls to their open/close entrypoints. This worked with some luck, but broke on i386 when _bus_dmamap_create started to allocate bounce buffers upfront, since memory below 16M may well not be available when the sound devices is opened for the Nth time. To fix this, create a new simple interface, isa_drq_alloc/isa_drq_free, wrappers around already existing bitmask macros. These are expected to be used before an isa_dmamap_create call, and after an isa_dmamap_destroy call, respectively. For the sb and ad1848 drivers, they're deferred until open/close. All isa_dmamap_create calls can now use BUS_DMA_ALLOCNOW and be done at attach time.
278 lines
8.9 KiB
C
278 lines
8.9 KiB
C
/* $NetBSD: isavar.h,v 1.40 2003/05/09 23:51:29 fvdl Exp $ */
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/*-
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* Copyright (c) 1997, 2001 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 Wasabi Systems, Inc.
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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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/*
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* Copyright (c) 1995 Chris G. Demetriou
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* Copyright (c) 1992 Berkeley Software Design, Inc.
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* All rights reserved.
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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 Berkeley Software
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* Design, Inc.
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* 4. The name of Berkeley Software Design must not be used to endorse
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* or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* BSDI Id: isavar.h,v 1.5 1992/12/01 18:06:00 karels Exp
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*/
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#ifndef _DEV_ISA_ISAVAR_H_
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#define _DEV_ISA_ISAVAR_H_
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/*
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* Definitions for ISA autoconfiguration.
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*/
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#include <sys/queue.h>
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#include <machine/bus.h>
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/*
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* Structures and definitions needed by the machine-dependent header.
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*/
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struct isabus_attach_args;
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#include <machine/isa_machdep.h>
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/*
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* ISA bus attach arguments
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*/
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struct isabus_attach_args {
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char *iba_busname; /* XXX should be common */
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bus_space_tag_t iba_iot; /* isa i/o space tag */
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bus_space_tag_t iba_memt; /* isa mem space tag */
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bus_dma_tag_t iba_dmat; /* isa DMA tag */
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isa_chipset_tag_t iba_ic;
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};
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/*
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* ISA bus resources.
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*/
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struct isa_io {
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int ir_addr;
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int ir_size;
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};
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struct isa_iomem {
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int ir_addr;
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int ir_size;
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};
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struct isa_irq {
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int ir_irq;
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};
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struct isa_drq {
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int ir_drq;
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};
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struct isa_pnpname {
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struct isa_pnpname *ipn_next;
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char *ipn_name;
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};
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/*
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* Machine-dependent code provides a list of these to describe
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* devices on the ISA bus which should be attached via direct
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* configuration.
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*
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* All of this information is dynamically allocated, so that
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* the ISA bus driver may free all of this information if the
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* bus does not support dynamic attach/detach of devices (e.g.
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* on a docking station).
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*
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* Some info on the "ik_key" field: This is a unique number for
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* each knowndev node. If, when we need to re-enumerate the
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* knowndevs, we discover that a node with key N is in the old
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* list but not in the new, the device has disappeared. Similarly,
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* if a node with key M is in the new list but not in the old,
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* the device is new. Note that the knowndevs list must be
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* sorted in ascending "key" order.
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*/
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struct isa_knowndev {
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TAILQ_ENTRY(isa_knowndev) ik_list;
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uintptr_t ik_key;
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struct device *ik_claimed;
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/*
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* The rest of these fields correspond to isa_attach_args
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* fields.
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*/
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char *ik_pnpname;
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struct isa_pnpname *ik_pnpcompatnames;
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struct isa_io *ik_io;
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int ik_nio;
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struct isa_iomem *ik_iomem;
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int ik_niomem;
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struct isa_irq *ik_irq;
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int ik_nirq;
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struct isa_drq *ik_drq;
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int ik_ndrq;
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};
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/*
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* ISA driver attach arguments
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*/
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struct isa_attach_args {
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bus_space_tag_t ia_iot; /* isa i/o space tag */
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bus_space_tag_t ia_memt; /* isa mem space tag */
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bus_dma_tag_t ia_dmat; /* DMA tag */
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isa_chipset_tag_t ia_ic;
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/*
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* PNP (or other) names to with which we can match a device
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* driver to a device that machine-dependent code tells us
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* is there (i.e. support for direct-configuration of ISA
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* devices).
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*/
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char *ia_pnpname;
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struct isa_pnpname *ia_pnpcompatnames;
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struct isa_io *ia_io; /* I/O resources */
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int ia_nio;
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struct isa_iomem *ia_iomem; /* memory resources */
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int ia_niomem;
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struct isa_irq *ia_irq; /* IRQ resources */
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int ia_nirq;
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struct isa_drq *ia_drq; /* DRQ resources */
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int ia_ndrq;
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void *ia_aux; /* driver specific */
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};
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/*
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* Test to determine if a given call to an ISA device probe routine
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* is actually an attempt to do direct configuration.
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*/
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#define ISA_DIRECT_CONFIG(ia) \
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((ia)->ia_pnpname != NULL || (ia)->ia_pnpcompatnames != NULL)
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#include "locators.h"
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/*
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* ISA master bus
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*/
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struct isa_softc {
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struct device sc_dev; /* base device */
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bus_space_tag_t sc_iot; /* isa io space tag */
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bus_space_tag_t sc_memt; /* isa mem space tag */
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bus_dma_tag_t sc_dmat; /* isa DMA tag */
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isa_chipset_tag_t sc_ic;
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TAILQ_HEAD(, isa_knowndev) sc_knowndevs;
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int sc_dynamicdevs;
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};
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#define cf_iobase cf_loc[ISACF_PORT]
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#define cf_iosize cf_loc[ISACF_SIZE]
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#define cf_maddr cf_loc[ISACF_IOMEM]
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#define cf_msize cf_loc[ISACF_IOSIZ]
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#define cf_irq cf_loc[ISACF_IRQ]
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#define cf_drq cf_loc[ISACF_DRQ]
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#define cf_drq2 cf_loc[ISACF_DRQ2]
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/*
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* ISA interrupt handler manipulation.
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*
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* To establish an ISA interrupt handler, a driver calls isa_intr_establish()
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* with the interrupt number, type, level, function, and function argument of
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* the interrupt it wants to handle. Isa_intr_establish() returns an opaque
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* handle to an event descriptor if it succeeds, and returns NULL on failure.
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* (XXX: some drivers can't handle this, since the former behaviour was to
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* invoke panic() on failure). When the system does not accept any of the
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* interrupt types supported by the driver, the driver should fail the attach.
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* Interrupt handlers should return 0 for "interrupt not for me", 1 for
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* "I took care of it", or -1 for "I guess it was mine, but I wasn't
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* expecting it."
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*
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* To remove an interrupt handler, the driver calls isa_intr_disestablish()
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* with the handle returned by isa_intr_establish() for that handler.
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*
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* The event counter (struct evcnt) associated with an interrupt line
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* (to be used as 'parent' for an ISA device's interrupt handler's evcnt)
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* can be obtained with isa_intr_evcnt().
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*/
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/* ISA interrupt sharing types */
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char *isa_intr_typename __P((int type));
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/*
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* Some ISA devices (e.g. on a VLB) can perform 32-bit DMA. This
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* flag is passed to bus_dmamap_create() to indicate that fact.
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*/
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#define ISABUS_DMA_32BIT BUS_DMA_BUS1
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/*
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* This flag indicates that the DMA channel should not yet be reserved,
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* even if BUS_DMA_ALLOCNOW is specified.
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*/
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#define ISABUS_DMA_DEFERCHAN BUS_DMA_BUS2
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#endif /* _DEV_ISA_ISAVAR_H_ */
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