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octeon_fpavar.h revision 1.6 
      1 /*	$NetBSD: octeon_fpavar.h,v 1.6 2020/06/22 02:26:20 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/cavium/octeonreg.h>
     33 
     34 struct octfpa_buf {
     35 	int		fb_poolno;	/* pool # */
     36 
     37 	size_t		fb_size;	/* element size */
     38 	size_t		fb_nelems;	/* # of elements */
     39 
     40 	paddr_t		fb_paddr;	/* physical address */
     41 	vaddr_t		fb_addr;	/* virtual address */
     42 	size_t		fb_len;		/* total length */
     43 
     44 	bus_dma_tag_t	fb_dmat;
     45 	bus_dmamap_t	fb_dmah;
     46 	bus_dma_segment_t
     47 			*fb_dma_segs;
     48 	int		fb_dma_nsegs;
     49 };
     50 
     51 uint64_t	octfpa_int_summary(void);
     52 int		octfpa_buf_init(int, size_t, size_t, struct octfpa_buf **);
     53 void		*octfpa_buf_get(struct octfpa_buf *);
     54 uint64_t	octfpa_query(int);
     55 int		octfpa_available_fpa_pool(int *available, int pool_no);
     56 
     57 #define OCTEON_CACHE_LINE_SIZE (128)
     58 
     59 /* Pool sizes in bytes, must be multiple of a cache line */
     60 #define FPA_POOL_0_SIZE (16 * OCTEON_CACHE_LINE_SIZE)
     61 #define FPA_POOL_1_SIZE (1 * OCTEON_CACHE_LINE_SIZE)
     62 #define FPA_POOL_2_SIZE (8 * OCTEON_CACHE_LINE_SIZE)
     63 #define FPA_POOL_3_SIZE (4 * OCTEON_CACHE_LINE_SIZE)
     64 
     65 #define FPA_POOL_4_SIZE (16 * OCTEON_CACHE_LINE_SIZE)
     66 #define FPA_POOL_5_SIZE (16 * OCTEON_CACHE_LINE_SIZE)
     67 #define FPA_POOL_6_SIZE (16 * OCTEON_CACHE_LINE_SIZE)
     68 #define FPA_POOL_7_SIZE (16 * OCTEON_CACHE_LINE_SIZE)
     69 
     70 /* Pools in use */
     71 #define FPA_RECV_PKT_POOL		(0)	/* Receive Packet buffers */
     72 #define FPA_RECV_PKT_POOL_SIZE		FPA_POOL_0_SIZE
     73 #define FPA_RECV_PKT_POOL_LINE		16
     74 #define FPA_WQE_POOL			(1)	/* Work queue entrys */
     75 #define FPA_WQE_POOL_SIZE		FPA_POOL_1_SIZE
     76 #define FPA_WQE_POOL_LINE		1
     77 #define FPA_COMMAND_BUFFER_POOL		(2)	/* PKO queue command buffers */
     78 #define FPA_COMMAND_BUFFER_POOL_SIZE	FPA_POOL_2_SIZE
     79 #define FPA_COMMAND_BUFFER_POOL_LINE	8
     80 #define FPA_GATHER_BUFFER_POOL		(3)	/* PKO gather list buffers */
     81 #define FPA_GATHER_BUFFER_POOL_SIZE	FPA_POOL_3_SIZE
     82 #define FPA_GATHER_BUFFER_POOL_LINE	4
     83 
     84 #ifndef FPA_OUTPUT_BUFFER_POOL
     85 #define FPA_OUTPUT_BUFFER_POOL		FPA_COMMAND_BUFFER_POOL
     86 #define FPA_OUTPUT_BUFFER_POOL_SIZE	FPA_COMMAND_BUFFER_POOL_SIZE
     87 #endif
     88 
     89 /*
     90  * operations
     91  */
     92 
     93 static __inline uint64_t
     94 octfpa_load(uint64_t fpapool)
     95 {
     96 	/* for FPA operations, subdid == pool number */
     97 	uint64_t addr = OCTEON_ADDR_IO_DID(FPA_MAJOR_DID, fpapool);
     98 
     99 	return octeon_read_csr(addr);
    100 }
    101 
    102 #ifdef notyet
    103 static __inline uint64_t
    104 octfpa_iobdma(struct octfpa_softc *sc, int srcaddr, int len)
    105 {
    106 
    107 	/* XXX */
    108 	return 0ULL;
    109 }
    110 #endif
    111 
    112 static __inline void
    113 octfpa_store(uint64_t addr, uint64_t fpapool, uint64_t dwbcount)
    114 {
    115 	/* for FPA operations, subdid == pool number */
    116 	uint64_t ptr =
    117 	    OCTEON_ADDR_IO_DID(FPA_MAJOR_DID, fpapool) |
    118 	    __SHIFTIN(addr, FPA_OPS_STORE_ADDR);
    119 
    120 	OCTEON_SYNCWS;
    121 	octeon_write_csr(ptr, __SHIFTIN(dwbcount, FPA_OPS_STORE_DATA_DWBCOUNT));
    122 }
    123 
    124 static __inline paddr_t
    125 octfpa_buf_get_paddr(struct octfpa_buf *fb)
    126 {
    127 
    128 	return octfpa_load(fb->fb_poolno);
    129 }
    130 
    131 static __inline void
    132 octfpa_buf_put_paddr(struct octfpa_buf *fb, paddr_t paddr)
    133 {
    134 
    135 	KASSERT(paddr >= fb->fb_paddr);
    136 	KASSERT(paddr < fb->fb_paddr + fb->fb_len);
    137 	octfpa_store(paddr, fb->fb_poolno, fb->fb_size / 128);
    138 }
    139 
    140 static __inline void
    141 octfpa_buf_put(struct octfpa_buf *fb, void *addr)
    142 {
    143 	paddr_t paddr;
    144 
    145 	KASSERT((vaddr_t)addr >= fb->fb_addr);
    146 	KASSERT((vaddr_t)addr < fb->fb_addr + fb->fb_len);
    147 	paddr = fb->fb_paddr + (paddr_t/* XXX */)((vaddr_t)addr - fb->fb_addr);
    148 	octfpa_buf_put_paddr(fb, paddr);
    149 }
    150 
    151 #endif /* _OCTEON_FPAVAR_H_ */
    152