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      1 /*	$NetBSD: ixp12x0_pci_dma.c,v 1.10 2022/09/27 06:36:42 skrll Exp $ */
      2 /*
      3  * Copyright (c) 2002, 2003
      4  *	Ichiro FUKUHARA <ichiro (at) ichiro.org>.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
     20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ixp12x0_pci_dma.c,v 1.10 2022/09/27 06:36:42 skrll Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/device.h>
     35 #include <sys/mbuf.h>
     36 
     37 #include <uvm/uvm_extern.h>
     38 
     39 #define _ARM32_BUS_DMA_PRIVATE
     40 #include <sys/bus.h>
     41 
     42 #include <arm/ixp12x0/ixp12x0_pcireg.h>
     43 #include <arm/ixp12x0/ixp12x0var.h>
     44 
     45 void
     46 ixp12x0_pci_dma_init(struct ixp12x0_softc *sc)
     47 {
     48 	extern paddr_t physical_start, physical_end;
     49 
     50 	bus_dma_tag_t dmat = &sc->ia_pci_dmat;
     51 	struct arm32_dma_range *dr = &sc->ia_pci_dma_range;
     52 
     53 	dmat->_ranges = dr;
     54 	dmat->_nranges = 1;
     55 
     56 	dr->dr_sysbase = physical_start;
     57 	dr->dr_busbase = PCI_MAPREG_MEM_ADDR(IXP1200_PCI_MEM_BAR +
     58 			 physical_start);
     59 	dr->dr_len = physical_end - physical_start;
     60 
     61 	dmat->_dmamap_create = _bus_dmamap_create;
     62 	dmat->_dmamap_destroy = _bus_dmamap_destroy;
     63 	dmat->_dmamap_load = _bus_dmamap_load;
     64 	dmat->_dmamap_load_mbuf = _bus_dmamap_load_mbuf;
     65 	dmat->_dmamap_load_uio = _bus_dmamap_load_uio;
     66 	dmat->_dmamap_load_raw = _bus_dmamap_load_raw;
     67 	dmat->_dmamap_unload = _bus_dmamap_unload;
     68 	dmat->_dmamap_sync_pre = _bus_dmamap_sync;
     69 	dmat->_dmamap_sync_post = NULL;
     70 
     71 	dmat->_dmamem_alloc = _bus_dmamem_alloc;
     72 	dmat->_dmamem_free = _bus_dmamem_free;
     73 	dmat->_dmamem_map = _bus_dmamem_map;
     74 	dmat->_dmamem_unmap = _bus_dmamem_unmap;
     75 	dmat->_dmamem_mmap = _bus_dmamem_mmap;
     76 
     77 	dmat->_dmatag_subregion = _bus_dmatag_subregion;
     78 	dmat->_dmatag_destroy = _bus_dmatag_destroy;
     79 }
     80