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5b435de0 AS |
1 | /* |
2 | * Copyright (c) 2010 Broadcom Corporation | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | |
11 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | |
13 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | |
14 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #ifndef _BRCMU_UTILS_H_ | |
18 | #define _BRCMU_UTILS_H_ | |
19 | ||
20 | #include <linux/skbuff.h> | |
21 | ||
22 | /* | |
23 | * Spin at most 'us' microseconds while 'exp' is true. | |
24 | * Caller should explicitly test 'exp' when this completes | |
25 | * and take appropriate error action if 'exp' is still true. | |
26 | */ | |
27 | #define SPINWAIT(exp, us) { \ | |
28 | uint countdown = (us) + 9; \ | |
29 | while ((exp) && (countdown >= 10)) {\ | |
30 | udelay(10); \ | |
31 | countdown -= 10; \ | |
32 | } \ | |
33 | } | |
34 | ||
35 | /* osl multi-precedence packet queue */ | |
36 | #define PKTQ_LEN_DEFAULT 128 /* Max 128 packets */ | |
37 | #define PKTQ_MAX_PREC 16 /* Maximum precedence levels */ | |
38 | ||
39 | #define BCME_STRLEN 64 /* Max string length for BCM errors */ | |
40 | ||
41 | /* the largest reasonable packet buffer driver uses for ethernet MTU in bytes */ | |
42 | #define PKTBUFSZ 2048 | |
43 | ||
44 | #ifndef setbit | |
45 | #ifndef NBBY /* the BSD family defines NBBY */ | |
46 | #define NBBY 8 /* 8 bits per byte */ | |
47 | #endif /* #ifndef NBBY */ | |
48 | #define setbit(a, i) (((u8 *)a)[(i)/NBBY] |= 1<<((i)%NBBY)) | |
49 | #define clrbit(a, i) (((u8 *)a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) | |
50 | #define isset(a, i) (((const u8 *)a)[(i)/NBBY] & (1<<((i)%NBBY))) | |
51 | #define isclr(a, i) ((((const u8 *)a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) | |
52 | #endif /* setbit */ | |
53 | ||
54 | #define NBITS(type) (sizeof(type) * 8) | |
55 | #define NBITVAL(nbits) (1 << (nbits)) | |
56 | #define MAXBITVAL(nbits) ((1 << (nbits)) - 1) | |
57 | #define NBITMASK(nbits) MAXBITVAL(nbits) | |
58 | #define MAXNBVAL(nbyte) MAXBITVAL((nbyte) * 8) | |
59 | ||
60 | /* crc defines */ | |
61 | #define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */ | |
62 | #define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */ | |
63 | ||
64 | /* 18-bytes of Ethernet address buffer length */ | |
65 | #define ETHER_ADDR_STR_LEN 18 | |
66 | ||
67 | struct pktq_prec { | |
ad3b8b39 | 68 | struct sk_buff_head skblist; |
5b435de0 AS |
69 | u16 max; /* maximum number of queued packets */ |
70 | }; | |
71 | ||
72 | /* multi-priority pkt queue */ | |
73 | struct pktq { | |
74 | u16 num_prec; /* number of precedences in use */ | |
75 | u16 hi_prec; /* rapid dequeue hint (>= highest non-empty prec) */ | |
76 | u16 max; /* total max packets */ | |
77 | u16 len; /* total number of packets */ | |
78 | /* | |
79 | * q array must be last since # of elements can be either | |
80 | * PKTQ_MAX_PREC or 1 | |
81 | */ | |
82 | struct pktq_prec q[PKTQ_MAX_PREC]; | |
83 | }; | |
84 | ||
85 | /* operations on a specific precedence in packet queue */ | |
86 | ||
87 | static inline int pktq_plen(struct pktq *pq, int prec) | |
88 | { | |
ad3b8b39 | 89 | return pq->q[prec].skblist.qlen; |
5b435de0 AS |
90 | } |
91 | ||
92 | static inline int pktq_pavail(struct pktq *pq, int prec) | |
93 | { | |
ad3b8b39 | 94 | return pq->q[prec].max - pq->q[prec].skblist.qlen; |
5b435de0 AS |
95 | } |
96 | ||
97 | static inline bool pktq_pfull(struct pktq *pq, int prec) | |
98 | { | |
ad3b8b39 | 99 | return pq->q[prec].skblist.qlen >= pq->q[prec].max; |
5b435de0 AS |
100 | } |
101 | ||
102 | static inline bool pktq_pempty(struct pktq *pq, int prec) | |
103 | { | |
ad3b8b39 | 104 | return skb_queue_empty(&pq->q[prec].skblist); |
5b435de0 AS |
105 | } |
106 | ||
107 | static inline struct sk_buff *pktq_ppeek(struct pktq *pq, int prec) | |
108 | { | |
ad3b8b39 | 109 | return skb_peek(&pq->q[prec].skblist); |
5b435de0 AS |
110 | } |
111 | ||
112 | static inline struct sk_buff *pktq_ppeek_tail(struct pktq *pq, int prec) | |
113 | { | |
ad3b8b39 | 114 | return skb_peek_tail(&pq->q[prec].skblist); |
5b435de0 AS |
115 | } |
116 | ||
117 | extern struct sk_buff *brcmu_pktq_penq(struct pktq *pq, int prec, | |
118 | struct sk_buff *p); | |
119 | extern struct sk_buff *brcmu_pktq_penq_head(struct pktq *pq, int prec, | |
120 | struct sk_buff *p); | |
121 | extern struct sk_buff *brcmu_pktq_pdeq(struct pktq *pq, int prec); | |
122 | extern struct sk_buff *brcmu_pktq_pdeq_tail(struct pktq *pq, int prec); | |
17f14d7c AS |
123 | extern struct sk_buff *brcmu_pktq_pdeq_match(struct pktq *pq, int prec, |
124 | bool (*match_fn)(struct sk_buff *p, | |
125 | void *arg), | |
126 | void *arg); | |
5b435de0 AS |
127 | |
128 | /* packet primitives */ | |
129 | extern struct sk_buff *brcmu_pkt_buf_get_skb(uint len); | |
130 | extern void brcmu_pkt_buf_free_skb(struct sk_buff *skb); | |
131 | ||
132 | /* Empty the queue at particular precedence level */ | |
133 | /* callback function fn(pkt, arg) returns true if pkt belongs to if */ | |
134 | extern void brcmu_pktq_pflush(struct pktq *pq, int prec, | |
135 | bool dir, bool (*fn)(struct sk_buff *, void *), void *arg); | |
136 | ||
137 | /* operations on a set of precedences in packet queue */ | |
138 | ||
139 | extern int brcmu_pktq_mlen(struct pktq *pq, uint prec_bmp); | |
140 | extern struct sk_buff *brcmu_pktq_mdeq(struct pktq *pq, uint prec_bmp, | |
141 | int *prec_out); | |
142 | ||
143 | /* operations on packet queue as a whole */ | |
144 | ||
145 | static inline int pktq_len(struct pktq *pq) | |
146 | { | |
147 | return (int)pq->len; | |
148 | } | |
149 | ||
150 | static inline int pktq_max(struct pktq *pq) | |
151 | { | |
152 | return (int)pq->max; | |
153 | } | |
154 | ||
155 | static inline int pktq_avail(struct pktq *pq) | |
156 | { | |
157 | return (int)(pq->max - pq->len); | |
158 | } | |
159 | ||
160 | static inline bool pktq_full(struct pktq *pq) | |
161 | { | |
162 | return pq->len >= pq->max; | |
163 | } | |
164 | ||
165 | static inline bool pktq_empty(struct pktq *pq) | |
166 | { | |
167 | return pq->len == 0; | |
168 | } | |
169 | ||
170 | extern void brcmu_pktq_init(struct pktq *pq, int num_prec, int max_len); | |
171 | /* prec_out may be NULL if caller is not interested in return value */ | |
172 | extern struct sk_buff *brcmu_pktq_peek_tail(struct pktq *pq, int *prec_out); | |
173 | extern void brcmu_pktq_flush(struct pktq *pq, bool dir, | |
174 | bool (*fn)(struct sk_buff *, void *), void *arg); | |
175 | ||
176 | /* externs */ | |
5b435de0 AS |
177 | /* ip address */ |
178 | struct ipv4_addr; | |
179 | ||
edee1668 AS |
180 | /* |
181 | * bitfield macros using masking and shift | |
182 | * | |
183 | * remark: the mask parameter should be a shifted mask. | |
184 | */ | |
185 | static inline void brcmu_maskset32(u32 *var, u32 mask, u8 shift, u32 value) | |
186 | { | |
187 | value = (value << shift) & mask; | |
188 | *var = (*var & ~mask) | value; | |
189 | } | |
190 | static inline u32 brcmu_maskget32(u32 var, u32 mask, u8 shift) | |
191 | { | |
192 | return (var & mask) >> shift; | |
193 | } | |
194 | static inline void brcmu_maskset16(u16 *var, u16 mask, u8 shift, u16 value) | |
195 | { | |
196 | value = (value << shift) & mask; | |
197 | *var = (*var & ~mask) | value; | |
198 | } | |
199 | static inline u16 brcmu_maskget16(u16 var, u16 mask, u8 shift) | |
200 | { | |
201 | return (var & mask) >> shift; | |
202 | } | |
09c7dfa0 AS |
203 | |
204 | /* externs */ | |
205 | /* format/print */ | |
8ae74654 | 206 | #ifdef DEBUG |
5b435de0 AS |
207 | extern void brcmu_prpkt(const char *msg, struct sk_buff *p0); |
208 | #else | |
209 | #define brcmu_prpkt(a, b) | |
8ae74654 | 210 | #endif /* DEBUG */ |
5b435de0 | 211 | |
1e023829 JP |
212 | #ifdef DEBUG |
213 | extern __printf(3, 4) | |
214 | void brcmu_dbg_hex_dump(const void *data, size_t size, const char *fmt, ...); | |
215 | #else | |
216 | __printf(3, 4) | |
217 | static inline | |
218 | void brcmu_dbg_hex_dump(const void *data, size_t size, const char *fmt, ...) | |
219 | { | |
220 | } | |
221 | #endif | |
222 | ||
5b435de0 | 223 | #endif /* _BRCMU_UTILS_H_ */ |