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iopaauvar.h revision 1.7 
      1 /*	$NetBSD: iopaauvar.h,v 1.7 2008/04/27 18:58:45 matt 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 #ifndef _XSCALE_IOPAAUVAR_H_
     39 #define	_XSCALE_IOPAAUVAR_H_
     40 
     41 #include <sys/pool.h>
     42 #include <dev/dmover/dmovervar.h>
     43 
     44 #define	AAU_MAX_INPUTS		8
     45 
     46 /*
     47  * Due to the way the AAU's descriptors work, the DMA segments for
     48  * the inputs and output must all be the same length.  For now, we
     49  * will enforce this by requiring all I/O to be page aligned, and
     50  * and not let it cross a page boundary.
     51  *
     52  * We could easily shrink this to any power of two.
     53  */
     54 #define	AAU_IO_BOUNDARY		4096
     55 
     56 struct iopaau_softc {
     57 	struct device sc_dev;
     58 	struct dmover_backend sc_dmb;
     59 
     60 	struct dmover_request *sc_running;
     61 
     62 	bus_space_tag_t sc_st;
     63 	bus_space_handle_t sc_sh;
     64 	bus_dma_tag_t sc_dmat;
     65 
     66 	void *sc_firstdesc;
     67 	void *sc_lastdesc;
     68 	uint32_t sc_firstdesc_pa;
     69 
     70 	bus_dmamap_t sc_map_out;
     71 	bus_dmamap_t sc_map_in[AAU_MAX_INPUTS];
     72 };
     73 
     74 struct iopaau_function {
     75 	int	(*af_setup)(struct iopaau_softc *, struct dmover_request *);
     76 	pool_cache_t af_desc_cache;
     77 };
     78 
     79 extern pool_cache_t iopaau_desc_4_cache;
     80 extern pool_cache_t iopaau_desc_8_cache;
     81 
     82 void	iopaau_attach(struct iopaau_softc *);
     83 void	iopaau_process(struct dmover_backend *);
     84 int	iopaau_intr(void *);
     85 
     86 int	iopaau_func_zero_setup(struct iopaau_softc *,
     87 	    struct dmover_request *);
     88 int	iopaau_func_fill8_setup(struct iopaau_softc *,
     89 	    struct dmover_request *);
     90 int	iopaau_func_xor_setup(struct iopaau_softc *,
     91 	    struct dmover_request *);
     92 
     93 void	iopaau_desc_free(pool_cache_t, void *);
     94 
     95 #endif /* _XSCALE_IOPAAUVAR_H_ */
     96