/* $NetBSD: atppc_isadma.c,v 1.8 2022/09/25 17:09:36 thorpej Exp $ */ /*- * Copyright (c) 2001 Alcove - Nicolas Souchu * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp * */ #include __KERNEL_RCSID(0, "$NetBSD: atppc_isadma.c,v 1.8 2022/09/25 17:09:36 thorpej Exp $"); #include "opt_atppc.h" #include #include #include #include #include #include #include #include #include #include #include #include /* Enable DMA */ int atppc_isadma_setup(struct atppc_softc * lsc, isa_chipset_tag_t ic, int drq) { int error = 1; /* Reserve DRQ */ if (isa_drq_alloc(ic, drq)) { ATPPC_DPRINTF(("%s(%s): cannot reserve DRQ line.\n", __func__, device_xname(lsc->sc_dev))); return error; } /* Get maximum DMA size for isa bus */ lsc->sc_dma_maxsize = isa_dmamaxsize(ic, drq); /* Create dma mapping */ error = isa_dmamap_create(ic, drq, lsc->sc_dma_maxsize, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW); return error; } /* Start DMA operation over ISA bus */ int atppc_isadma_start(isa_chipset_tag_t ic, int drq, void *buf, u_int nbytes, u_int8_t mode) { return (isa_dmastart(ic, drq, buf, nbytes, NULL, ((mode == ATPPC_DMA_MODE_WRITE) ? DMAMODE_WRITE : DMAMODE_READ) | DMAMODE_DEMAND, ((mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMA_WRITE : BUS_DMA_READ) | BUS_DMA_NOWAIT)); } /* Stop DMA operation over ISA bus */ int atppc_isadma_finish(isa_chipset_tag_t ic, int drq) { isa_dmadone(ic, drq); return 0; } /* Abort DMA operation over ISA bus */ int atppc_isadma_abort(isa_chipset_tag_t ic, int drq) { isa_dmaabort(ic, drq); return 0; } /* Allocate memory for DMA over ISA bus */ int atppc_isadma_malloc(isa_chipset_tag_t ic, int drq, void **buf, bus_addr_t *bus_addr, bus_size_t size) { int error; error = isa_dmamem_alloc(ic, drq, size, bus_addr, BUS_DMA_WAITOK); if (error) return error; error = isa_dmamem_map(ic, drq, *bus_addr, size, buf, BUS_DMA_WAITOK); if (error) isa_dmamem_free(ic, drq, *bus_addr, size); return error; } /* Free memory allocated by atppc_isadma_malloc() */ void atppc_isadma_free(isa_chipset_tag_t ic, int drq, void ** buf, bus_addr_t * bus_addr, bus_size_t size) { isa_dmamem_unmap(ic, drq, *buf, size); isa_dmamem_free(ic, drq, *bus_addr, size); }