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octeon_dma.c revision 1.2 
      1 /*	$NetBSD: octeon_dma.c,v 1.2 2016/07/11 16:15:35 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Platform-specific DMA support for the MIPS OCTEON.  Copied from MALTA code.
     41  */
     42 
     43 #include <sys/cdefs.h>
     44 __KERNEL_RCSID(0, "$NetBSD: octeon_dma.c,v 1.2 2016/07/11 16:15:35 matt Exp $");
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 
     49 #include <mips/cpuregs.h>
     50 
     51 #define	_MIPS_BUS_DMA_PRIVATE
     52 #include <sys/bus.h>
     53 
     54 #include <mips/cavium/octeonvar.h>
     55 
     56 void
     57 octeon_dma_init(struct octeon_config *mcp)
     58 {
     59 	bus_dma_tag_t t;
     60 
     61 	/* XXX need 32bit tag? */
     62 	t = &mcp->mc_iobus_dmat;
     63 	t->_cookie = mcp;
     64 	t->_wbase = 0;
     65 	t->_bounce_alloc_lo = 0;
     66 	t->_bounce_alloc_hi = 0;
     67 	t->_dmamap_ops = mips_bus_dmamap_ops;
     68 	t->_dmamem_ops = mips_bus_dmamem_ops;
     69 	t->_dmatag_ops = mips_bus_dmatag_ops;
     70 
     71 	/* XXX struct copy */
     72 	mcp->mc_bootbus_dmat = mcp->mc_iobus_dmat;
     73 	mcp->mc_core1_dmat = mcp->mc_iobus_dmat;
     74 	mcp->mc_fpa_dmat = mcp->mc_iobus_dmat;
     75 
     76 #ifdef __mips_n32
     77 	mcp->mc_fpa_dmat._bounce_alloc_hi = round_page(MIPS_PHYS_MASK);
     78 #endif
     79 }
     80