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
octfpa_load(uint64_t fpapool)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
octfpa_iobdma(struct octfpa_softc * sc,int srcaddr,int len)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
octfpa_store(uint64_t addr,uint64_t fpapool,uint64_t dwbcount)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
octfpa_buf_get_paddr(struct octfpa_buf * fb)127 octfpa_buf_get_paddr(struct octfpa_buf *fb)
128 {
129
130 return octfpa_load(fb->fb_poolno);
131 }
132
133 static __inline void
octfpa_buf_put_paddr(struct octfpa_buf * fb,paddr_t paddr)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
octfpa_buf_put(struct octfpa_buf * fb,void * addr)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