diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/net/wireless/brcm80211/include/brcmu_utils.h |
Initial import
Diffstat (limited to 'drivers/net/wireless/brcm80211/include/brcmu_utils.h')
-rw-r--r-- | drivers/net/wireless/brcm80211/include/brcmu_utils.h | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/include/brcmu_utils.h b/drivers/net/wireless/brcm80211/include/brcmu_utils.h new file mode 100644 index 000000000..41969527b --- /dev/null +++ b/drivers/net/wireless/brcm80211/include/brcmu_utils.h @@ -0,0 +1,227 @@ +/* + * Copyright (c) 2010 Broadcom Corporation + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _BRCMU_UTILS_H_ +#define _BRCMU_UTILS_H_ + +#include <linux/skbuff.h> + +/* + * Spin at most 'us' microseconds while 'exp' is true. + * Caller should explicitly test 'exp' when this completes + * and take appropriate error action if 'exp' is still true. + */ +#define SPINWAIT(exp, us) { \ + uint countdown = (us) + 9; \ + while ((exp) && (countdown >= 10)) {\ + udelay(10); \ + countdown -= 10; \ + } \ +} + +/* osl multi-precedence packet queue */ +#define PKTQ_LEN_DEFAULT 128 /* Max 128 packets */ +#define PKTQ_MAX_PREC 16 /* Maximum precedence levels */ + +#define BCME_STRLEN 64 /* Max string length for BCM errors */ + +/* the largest reasonable packet buffer driver uses for ethernet MTU in bytes */ +#define PKTBUFSZ 2048 + +#ifndef setbit +#ifndef NBBY /* the BSD family defines NBBY */ +#define NBBY 8 /* 8 bits per byte */ +#endif /* #ifndef NBBY */ +#define setbit(a, i) (((u8 *)a)[(i)/NBBY] |= 1<<((i)%NBBY)) +#define clrbit(a, i) (((u8 *)a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) +#define isset(a, i) (((const u8 *)a)[(i)/NBBY] & (1<<((i)%NBBY))) +#define isclr(a, i) ((((const u8 *)a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) +#endif /* setbit */ + +#define NBITS(type) (sizeof(type) * 8) +#define NBITVAL(nbits) (1 << (nbits)) +#define MAXBITVAL(nbits) ((1 << (nbits)) - 1) +#define NBITMASK(nbits) MAXBITVAL(nbits) +#define MAXNBVAL(nbyte) MAXBITVAL((nbyte) * 8) + +/* crc defines */ +#define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */ +#define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */ + +/* 18-bytes of Ethernet address buffer length */ +#define ETHER_ADDR_STR_LEN 18 + +struct pktq_prec { + struct sk_buff_head skblist; + u16 max; /* maximum number of queued packets */ +}; + +/* multi-priority pkt queue */ +struct pktq { + u16 num_prec; /* number of precedences in use */ + u16 hi_prec; /* rapid dequeue hint (>= highest non-empty prec) */ + u16 max; /* total max packets */ + u16 len; /* total number of packets */ + /* + * q array must be last since # of elements can be either + * PKTQ_MAX_PREC or 1 + */ + struct pktq_prec q[PKTQ_MAX_PREC]; +}; + +/* operations on a specific precedence in packet queue */ + +static inline int pktq_plen(struct pktq *pq, int prec) +{ + return pq->q[prec].skblist.qlen; +} + +static inline int pktq_pavail(struct pktq *pq, int prec) +{ + return pq->q[prec].max - pq->q[prec].skblist.qlen; +} + +static inline bool pktq_pfull(struct pktq *pq, int prec) +{ + return pq->q[prec].skblist.qlen >= pq->q[prec].max; +} + +static inline bool pktq_pempty(struct pktq *pq, int prec) +{ + return skb_queue_empty(&pq->q[prec].skblist); +} + +static inline struct sk_buff *pktq_ppeek(struct pktq *pq, int prec) +{ + return skb_peek(&pq->q[prec].skblist); +} + +static inline struct sk_buff *pktq_ppeek_tail(struct pktq *pq, int prec) +{ + return skb_peek_tail(&pq->q[prec].skblist); +} + +struct sk_buff *brcmu_pktq_penq(struct pktq *pq, int prec, struct sk_buff *p); +struct sk_buff *brcmu_pktq_penq_head(struct pktq *pq, int prec, + struct sk_buff *p); +struct sk_buff *brcmu_pktq_pdeq(struct pktq *pq, int prec); +struct sk_buff *brcmu_pktq_pdeq_tail(struct pktq *pq, int prec); +struct sk_buff *brcmu_pktq_pdeq_match(struct pktq *pq, int prec, + bool (*match_fn)(struct sk_buff *p, + void *arg), + void *arg); + +/* packet primitives */ +struct sk_buff *brcmu_pkt_buf_get_skb(uint len); +void brcmu_pkt_buf_free_skb(struct sk_buff *skb); + +/* Empty the queue at particular precedence level */ +/* callback function fn(pkt, arg) returns true if pkt belongs to if */ +void brcmu_pktq_pflush(struct pktq *pq, int prec, bool dir, + bool (*fn)(struct sk_buff *, void *), void *arg); + +/* operations on a set of precedences in packet queue */ + +int brcmu_pktq_mlen(struct pktq *pq, uint prec_bmp); +struct sk_buff *brcmu_pktq_mdeq(struct pktq *pq, uint prec_bmp, int *prec_out); + +/* operations on packet queue as a whole */ + +static inline int pktq_len(struct pktq *pq) +{ + return (int)pq->len; +} + +static inline int pktq_max(struct pktq *pq) +{ + return (int)pq->max; +} + +static inline int pktq_avail(struct pktq *pq) +{ + return (int)(pq->max - pq->len); +} + +static inline bool pktq_full(struct pktq *pq) +{ + return pq->len >= pq->max; +} + +static inline bool pktq_empty(struct pktq *pq) +{ + return pq->len == 0; +} + +void brcmu_pktq_init(struct pktq *pq, int num_prec, int max_len); +/* prec_out may be NULL if caller is not interested in return value */ +struct sk_buff *brcmu_pktq_peek_tail(struct pktq *pq, int *prec_out); +void brcmu_pktq_flush(struct pktq *pq, bool dir, + bool (*fn)(struct sk_buff *, void *), void *arg); + +/* externs */ +/* ip address */ +struct ipv4_addr; + +/* + * bitfield macros using masking and shift + * + * remark: the mask parameter should be a shifted mask. + */ +static inline void brcmu_maskset32(u32 *var, u32 mask, u8 shift, u32 value) +{ + value = (value << shift) & mask; + *var = (*var & ~mask) | value; +} +static inline u32 brcmu_maskget32(u32 var, u32 mask, u8 shift) +{ + return (var & mask) >> shift; +} +static inline void brcmu_maskset16(u16 *var, u16 mask, u8 shift, u16 value) +{ + value = (value << shift) & mask; + *var = (*var & ~mask) | value; +} +static inline u16 brcmu_maskget16(u16 var, u16 mask, u8 shift) +{ + return (var & mask) >> shift; +} + +/* externs */ +/* format/print */ +#ifdef DEBUG +void brcmu_prpkt(const char *msg, struct sk_buff *p0); +#else +#define brcmu_prpkt(a, b) +#endif /* DEBUG */ + +#ifdef DEBUG +__printf(3, 4) +void brcmu_dbg_hex_dump(const void *data, size_t size, const char *fmt, ...); +#else +__printf(3, 4) +static inline +void brcmu_dbg_hex_dump(const void *data, size_t size, const char *fmt, ...) +{ +} +#endif + +#define BRCMU_BOARDREV_LEN 8 +#define BRCMU_DOTREV_LEN 16 + +char *brcmu_boardrev_str(u32 brev, char *buf); +char *brcmu_dotrev_str(u32 dotrev, char *buf); + +#endif /* _BRCMU_UTILS_H_ */ |