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      1 /*	$NetBSD: octeon_fauvar.h,v 1.4 2020/06/23 05:14:18 simonb Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Internet Initiative Japan, Inc.
      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 THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR 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 #ifndef _OCTEON_FAUVAR_H_
     30 #define _OCTEON_FAUVAR_H_
     31 
     32 #include <mips/cavium/octeonreg.h>
     33 
     34 /* ---- API */
     35 
     36 struct octfau_desc {
     37 	/* offset in scratch buffer */
     38 	size_t		fd_scroff;	/* XXX offset_t */
     39 	/* FAU register number */
     40 	size_t		fd_regno;	/* XXX offset_t */
     41 };
     42 
     43 void		octfau_op_init(struct octfau_desc *, size_t, size_t);
     44 uint64_t	octfau_op_save(struct octfau_desc *);
     45 void		octfau_op_restore(struct octfau_desc *, uint64_t);
     46 int64_t		octfau_op_inc_8(struct octfau_desc *, int64_t);
     47 int32_t		octfau_op_inc_4(struct octfau_desc *, int32_t);
     48 int16_t		octfau_op_inc_2(struct octfau_desc *, int16_t);
     49 int8_t		octfau_op_inc_1(struct octfau_desc *, int8_t);
     50 int64_t		octfau_op_incwait_8(struct octfau_desc *, int);
     51 int32_t		octfau_op_incwait_4(struct octfau_desc *, int);
     52 int16_t		octfau_op_incwait_2(struct octfau_desc *, int);
     53 int8_t		octfau_op_incwait_1(struct octfau_desc *, int);
     54 int64_t		octfau_op_get_8(struct octfau_desc *);
     55 int32_t		octfau_op_get_4(struct octfau_desc *);
     56 int16_t		octfau_op_get_2(struct octfau_desc *);
     57 int8_t		octfau_op_get_1(struct octfau_desc *);
     58 int64_t		octfau_op_getwait_8(struct octfau_desc *);
     59 int32_t		octfau_op_getwait_4(struct octfau_desc *);
     60 int16_t		octfau_op_getwait_2(struct octfau_desc *);
     61 int8_t		octfau_op_getwait_1(struct octfau_desc *);
     62 void		octfau_op_add_8(struct octfau_desc *, int64_t);
     63 void		octfau_op_add_4(struct octfau_desc *, int32_t);
     64 void		octfau_op_add_2(struct octfau_desc *, int16_t);
     65 void		octfau_op_add_1(struct octfau_desc *, int8_t);
     66 void		octfau_op_set_8(struct octfau_desc *, int64_t);
     67 void		octfau_op_set_4(struct octfau_desc *, int32_t);
     68 void		octfau_op_set_2(struct octfau_desc *, int16_t);
     69 void		octfau_op_set_1(struct octfau_desc *, int8_t);
     70 
     71 /* ---- old API */
     72 
     73 /* XXX */
     74 #define OCT_FAU_REG_OQ_ADDR_INDEX (0)
     75 #define OCT_FAU_REG_ADDR_END (256)
     76 /* XXX */
     77 
     78 /* XXX */
     79 typedef enum {
     80 	OCT_FAU_OP_SIZE_8  = 0,
     81 	OCT_FAU_OP_SIZE_16 = 1,
     82 	OCT_FAU_OP_SIZE_32 = 2,
     83 	OCT_FAU_OP_SIZE_64 = 3
     84 } fau_op_size_t;
     85 /* XXX */
     86 
     87 /*
     88  * XXX
     89  * `scraddr' parameter of IOBDMA operation is actually `index';
     90  */
     91 static inline void
     92 octfau_op_iobdma(int index, uint64_t args)
     93 {
     94 	uint64_t value = IOBDMA_CREATE(FAU_MAJOR_DID, FAU_SUB_DID,
     95 	    index, POW_IOBDMA_LEN, args);
     96 
     97 	octeon_iobdma_write_8(value);
     98 }
     99 
    100 /* IOBDMA Operations */
    101 
    102 /* IOBDMA Store Data for FAU Operations */
    103 
    104 static inline void
    105 octfau_op_iobdma_store_data(int scraddr, int incval, int tagwait,
    106     int size, int reg)
    107 {
    108 	uint64_t args =
    109 	    __SHIFTIN(incval, POW_IOBDMA_INCVAL) |
    110 	    __SHIFTIN(tagwait, POW_IOBDMA_TAGWAIT) |
    111 	    __SHIFTIN(size, POW_IOBDMA_SIZE) |
    112 	    __SHIFTIN(reg, POW_IOBDMA_REG);
    113 
    114 	/* `scraddr' parameter of IOBDMA operation is actually `index' */
    115 	octfau_op_iobdma(scraddr / sizeof(uint64_t), args);
    116 }
    117 
    118 static inline void
    119 octfau_op_inc_fetch_8(struct octfau_desc *fd, int64_t v)
    120 {
    121 
    122 	octfau_op_iobdma_store_data(fd->fd_scroff, v, 0,
    123 	    OCT_FAU_OP_SIZE_64/* XXX */, fd->fd_regno);
    124 }
    125 
    126 static inline int64_t
    127 octfau_op_inc_read_8(struct octfau_desc *fd)
    128 {
    129 
    130 	OCTEON_SYNCIOBDMA;
    131 	return octeon_cvmseg_read_8(fd->fd_scroff);
    132 }
    133 
    134 #endif /* _OCTEON_FAUVAR_H_ */
    135