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      1 /*	$NetBSD: octeon_fpavar.h,v 1.7 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_FPAVAR_H_
     30 #define _OCTEON_FPAVAR_H_
     31 
     32 #include <mips/cache_octeon.h>
     33 
     34 #include <mips/cavium/octeonreg.h>
     35 #include <mips/cavium/dev/octeon_fpareg.h>
     36 
     37 struct octfpa_buf {
     38 	int		fb_poolno;	/* pool # */
     39 
     40 	size_t		fb_size;	/* element size */
     41 	size_t		fb_nelems;	/* # of elements */
     42 
     43 	paddr_t		fb_paddr;	/* physical address */
     44 	vaddr_t		fb_addr;	/* virtual address */
     45 	size_t		fb_len;		/* total length */
     46 
     47 	bus_dma_tag_t	fb_dmat;
     48 	bus_dmamap_t	fb_dmah;
     49 	bus_dma_segment_t
     50 			*fb_dma_segs;
     51 	int		fb_dma_nsegs;
     52 };
     53 
     54 uint64_t	octfpa_int_summary(void);
     55 int		octfpa_buf_init(int, size_t, size_t, struct octfpa_buf **);
     56 void		*octfpa_buf_get(struct octfpa_buf *);
     57 uint64_t	octfpa_query(int);
     58 int		octfpa_available_fpa_pool(int *available, int pool_no);
     59 
     60 /* Pool sizes in bytes, must be multiple of a cache line */
     61 #define FPA_POOL_0_SIZE (16 * OCTEON_CACHELINE_SIZE)
     62 #define FPA_POOL_1_SIZE (1 * OCTEON_CACHELINE_SIZE)
     63 #define FPA_POOL_2_SIZE (8 * OCTEON_CACHELINE_SIZE)
     64 #define FPA_POOL_3_SIZE (4 * OCTEON_CACHELINE_SIZE)
     65 
     66 #define FPA_POOL_4_SIZE (16 * OCTEON_CACHELINE_SIZE)
     67 #define FPA_POOL_5_SIZE (16 * OCTEON_CACHELINE_SIZE)
     68 #define FPA_POOL_6_SIZE (16 * OCTEON_CACHELINE_SIZE)
     69 #define FPA_POOL_7_SIZE (16 * OCTEON_CACHELINE_SIZE)
     70 
     71 /* Pools in use */
     72 #define FPA_RECV_PKT_POOL		(0)	/* Receive Packet buffers */
     73 #define FPA_RECV_PKT_POOL_SIZE		FPA_POOL_0_SIZE
     74 #define FPA_RECV_PKT_POOL_LINE		16
     75 #define FPA_WQE_POOL			(1)	/* Work queue entrys */
     76 #define FPA_WQE_POOL_SIZE		FPA_POOL_1_SIZE
     77 #define FPA_WQE_POOL_LINE		1
     78 #define FPA_COMMAND_BUFFER_POOL		(2)	/* PKO queue command buffers */
     79 #define FPA_COMMAND_BUFFER_POOL_SIZE	FPA_POOL_2_SIZE
     80 #define FPA_COMMAND_BUFFER_POOL_LINE	8
     81 #define FPA_GATHER_BUFFER_POOL		(3)	/* PKO gather list buffers */
     82 #define FPA_GATHER_BUFFER_POOL_SIZE	FPA_POOL_3_SIZE
     83 #define FPA_GATHER_BUFFER_POOL_LINE	4
     84 
     85 #ifndef FPA_OUTPUT_BUFFER_POOL
     86 #define FPA_OUTPUT_BUFFER_POOL		FPA_COMMAND_BUFFER_POOL
     87 #define FPA_OUTPUT_BUFFER_POOL_SIZE	FPA_COMMAND_BUFFER_POOL_SIZE
     88 #endif
     89 
     90 /*
     91  * operations
     92  */
     93 
     94 static __inline uint64_t
     95 octfpa_load(uint64_t fpapool)
     96 {
     97 	/* for FPA operations, subdid == pool number */
     98 	uint64_t addr = OCTEON_ADDR_IO_DID(FPA_MAJOR_DID, fpapool);
     99 
    100 	return octeon_xkphys_read_8(addr);
    101 }
    102 
    103 #ifdef notyet
    104 static __inline uint64_t
    105 octfpa_iobdma(struct octfpa_softc *sc, int srcaddr, int len)
    106 {
    107 
    108 	/* XXX */
    109 	return 0ULL;
    110 }
    111 #endif
    112 
    113 static __inline void
    114 octfpa_store(uint64_t addr, uint64_t fpapool, uint64_t dwbcount)
    115 {
    116 	/* for FPA operations, subdid == pool number */
    117 	uint64_t ptr =
    118 	    OCTEON_ADDR_IO_DID(FPA_MAJOR_DID, fpapool) |
    119 	    __SHIFTIN(addr, FPA_OPS_STORE_ADDR);
    120 
    121 	OCTEON_SYNCWS;
    122 	octeon_xkphys_write_8(ptr,
    123 	    __SHIFTIN(dwbcount, FPA_OPS_STORE_DATA_DWBCOUNT));
    124 }
    125 
    126 static __inline paddr_t
    127 octfpa_buf_get_paddr(struct octfpa_buf *fb)
    128 {
    129 
    130 	return octfpa_load(fb->fb_poolno);
    131 }
    132 
    133 static __inline void
    134 octfpa_buf_put_paddr(struct octfpa_buf *fb, paddr_t paddr)
    135 {
    136 
    137 	KASSERT(paddr >= fb->fb_paddr);
    138 	KASSERT(paddr < fb->fb_paddr + fb->fb_len);
    139 	octfpa_store(paddr, fb->fb_poolno, fb->fb_size / 128);
    140 }
    141 
    142 static __inline void
    143 octfpa_buf_put(struct octfpa_buf *fb, void *addr)
    144 {
    145 	paddr_t paddr;
    146 
    147 	KASSERT((vaddr_t)addr >= fb->fb_addr);
    148 	KASSERT((vaddr_t)addr < fb->fb_addr + fb->fb_len);
    149 	paddr = fb->fb_paddr + (paddr_t/* XXX */)((vaddr_t)addr - fb->fb_addr);
    150 	octfpa_buf_put_paddr(fb, paddr);
    151 }
    152 
    153 #endif /* _OCTEON_FPAVAR_H_ */
    154