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int_bus_dma.c revision 1.17.18.1 
      1 /*	$NetBSD: int_bus_dma.c,v 1.17.18.1 2012/11/20 03:01:15 tls Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * PCI DMA support for the ARM Integrator.
     40  */
     41 
     42 #define	_ARM32_BUS_DMA_PRIVATE
     43 
     44 #include <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: int_bus_dma.c,v 1.17.18.1 2012/11/20 03:01:15 tls Exp $");
     46 
     47 #include <sys/param.h>
     48 #include <sys/systm.h>
     49 #include <sys/device.h>
     50 #include <sys/malloc.h>
     51 #include <sys/mbuf.h>
     52 
     53 #include <uvm/uvm_extern.h>
     54 
     55 #include <machine/bootconfig.h>
     56 
     57 #include <evbarm/integrator/int_bus_dma.h>
     58 
     59 #undef	DEBUG
     60 #define DEBUG(x)
     61 
     62 static struct arm32_dma_range integrator_dma_ranges[DRAM_BLOCKS];
     63 
     64 extern BootConfig bootconfig;
     65 
     66 void
     67 integrator_pci_dma_init(bus_dma_tag_t dmat)
     68 {
     69 	struct arm32_dma_range *dr = integrator_dma_ranges;
     70 	int i;
     71 	int nranges = 0;
     72 
     73 	for (i = 0; i < bootconfig.dramblocks; i++) {
     74 		if (bootconfig.dram[i].flags & BOOT_DRAM_CAN_DMA) {
     75 			dr[nranges].dr_sysbase = bootconfig.dram[i].address;
     76 			dr[nranges].dr_busbase =
     77 			    LOCAL_TO_CM_ALIAS(dr[nranges].dr_sysbase);
     78 			dr[nranges].dr_len = bootconfig.dram[i].pages * NBPG;
     79 			nranges++;
     80 		}
     81 	}
     82 
     83 	if (nranges == 0)
     84 		panic ("integrator_pci_dma_init: No DMA capable memory");
     85 
     86 	dmat->_ranges = dr;
     87 	dmat->_nranges = nranges;
     88 
     89 	dmat->_dmamap_create = _bus_dmamap_create;
     90 	dmat->_dmamap_destroy = _bus_dmamap_destroy;
     91 	dmat->_dmamap_load = _bus_dmamap_load;
     92 	dmat->_dmamap_load_mbuf = _bus_dmamap_load_mbuf;
     93 	dmat->_dmamap_load_uio = _bus_dmamap_load_uio;
     94 	dmat->_dmamap_load_raw = _bus_dmamap_load_raw;
     95 	dmat->_dmamap_unload = _bus_dmamap_unload;
     96 	dmat->_dmamap_sync_pre = _bus_dmamap_sync;
     97 	dmat->_dmamap_sync_post = _bus_dmamap_sync;
     98 
     99 	dmat->_dmamem_alloc = _bus_dmamem_alloc;
    100 	dmat->_dmamem_free = _bus_dmamem_free;
    101 	dmat->_dmamem_map = _bus_dmamem_map;
    102 	dmat->_dmamem_unmap = _bus_dmamem_unmap;
    103 	dmat->_dmamem_mmap = _bus_dmamem_mmap;
    104 
    105 	dmat->_dmatag_subregion = _bus_dmatag_subregion;
    106 	dmat->_dmatag_destroy = _bus_dmatag_destroy;
    107 }
    108