From: Roland Vossen Date: Tue, 13 Sep 2011 07:49:45 +0000 (+0200) Subject: staging: brcm80211: macro cleanup in softmac dma X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=11de5b72cab5e14bef71ab2dde75d7278a90e38f;p=deliverable%2Flinux.git staging: brcm80211: macro cleanup in softmac dma Substituted macro's by functions. Renamed several struct members in dma.c to get rid of a set of macro's. Reported-by: Johannes Berg Reviewed-by: Arend van Spriel Signed-off-by: Roland Vossen Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/brcm80211/brcmsmac/dma.c b/drivers/staging/brcm80211/brcmsmac/dma.c index 63e5e0e8cfb3..6c9b1fe29e9b 100644 --- a/drivers/staging/brcm80211/brcmsmac/dma.c +++ b/drivers/staging/brcm80211/brcmsmac/dma.c @@ -155,9 +155,6 @@ #define D64_RX_FRM_STS_DSCRCNT 0x0f000000 /* no. of descriptors used - 1 */ #define D64_RX_FRM_STS_DATATYPE 0xf0000000 /* core-dependent data type */ -#define DMA64_DD_PARITY(dd) \ - parity32((dd)->addrlow ^ (dd)->addrhigh ^ (dd)->ctrl1 ^ (dd)->ctrl2) - /* * packet headroom necessary to accommodate the largest header * in the system, (i.e TXOFF). By doing, we avoid the need to @@ -192,27 +189,8 @@ #define DMA_NONE(args) -#define d64txregs dregs.d64_u.txregs_64 -#define d64rxregs dregs.d64_u.rxregs_64 -#define txd64 dregs.d64_u.txd_64 -#define rxd64 dregs.d64_u.rxd_64 - #define MAXNAMEL 8 /* 8 char names */ -/* descriptor bumping macros */ -/* faster than %, but n must be power of 2 */ -#define XXD(x, n) ((x) & ((n) - 1)) - -#define TXD(x) XXD((x), di->ntxd) -#define RXD(x) XXD((x), di->nrxd) -#define NEXTTXD(i) TXD((i) + 1) -#define PREVTXD(i) TXD((i) - 1) -#define NEXTRXD(i) RXD((i) + 1) -#define PREVRXD(i) RXD((i) - 1) - -#define NTXDACTIVE(h, t) TXD((t) - (h)) -#define NRXDACTIVE(h, t) RXD((t) - (h)) - /* macros to convert between byte offsets and indexes */ #define B2I(bytes, type) ((bytes) / sizeof(type)) #define I2B(index, type) ((index) * sizeof(type)) @@ -245,18 +223,14 @@ struct dma_info { bool dma64; /* this dma engine is operating in 64-bit mode */ bool addrext; /* this dma engine supports DmaExtendedAddrChanges */ - union { - struct { - /* 64-bit dma tx engine registers */ - struct dma64regs *txregs_64; - /* 64-bit dma rx engine registers */ - struct dma64regs *rxregs_64; - /* pointer to dma64 tx descriptor ring */ - struct dma64desc *txd_64; - /* pointer to dma64 rx descriptor ring */ - struct dma64desc *rxd_64; - } d64_u; - } dregs; + /* 64-bit dma tx engine registers */ + struct dma64regs *d64txregs; + /* 64-bit dma rx engine registers */ + struct dma64regs *d64rxregs; + /* pointer to dma64 tx descriptor ring */ + struct dma64desc *txd64; + /* pointer to dma64 rx descriptor ring */ + struct dma64desc *rxd64; u16 dmadesc_align; /* alignment requirement for dma descriptors */ @@ -320,6 +294,65 @@ struct dma_info { */ static uint dma_msg_level; +/* Check for odd number of 1's */ +static u32 parity32(u32 data) +{ + data ^= data >> 16; + data ^= data >> 8; + data ^= data >> 4; + data ^= data >> 2; + data ^= data >> 1; + + return data & 1; +} + +static bool dma64_dd_parity(struct dma64desc *dd) +{ + return parity32(dd->addrlow ^ dd->addrhigh ^ dd->ctrl1 ^ dd->ctrl2); +} + +/* descriptor bumping functions */ + +static uint xxd(uint x, uint n) +{ + return x & (n - 1); /* faster than %, but n must be power of 2 */ +} + +static uint txd(struct dma_info *di, uint x) +{ + return xxd(x, di->ntxd); +} + +static uint rxd(struct dma_info *di, uint x) +{ + return xxd(x, di->nrxd); +} + +static uint nexttxd(struct dma_info *di, uint i) +{ + return txd(di, i + 1); +} + +static uint prevtxd(struct dma_info *di, uint i) +{ + return txd(di, i - 1); +} + +static uint nextrxd(struct dma_info *di, uint i) +{ + return txd(di, i + 1); +} + +static uint ntxdactive(struct dma_info *di, uint h, uint t) +{ + return txd(di, t-h); +} + +static uint nrxdactive(struct dma_info *di, uint h, uint t) +{ + return rxd(di, t-h); +} + static uint _dma_ctrlflags(struct dma_info *di, uint mask, uint flags) { uint dmactrlflags = di->dma.dmactrlflags; @@ -675,18 +708,6 @@ struct dma_pub *dma_attach(char *name, struct si_pub *sih, return NULL; } -/* Check for odd number of 1's */ -static inline u32 parity32(u32 data) -{ - data ^= data >> 16; - data ^= data >> 8; - data ^= data >> 4; - data ^= data >> 2; - data ^= data >> 1; - - return data & 1; -} - static inline void dma64_dd_upd(struct dma_info *di, struct dma64desc *ddring, dma_addr_t pa, uint outidx, u32 *flags, u32 bufcount) @@ -713,7 +734,7 @@ dma64_dd_upd(struct dma_info *di, struct dma64desc *ddring, ddring[outidx].ctrl2 = cpu_to_le32(ctrl2); } if (di->dma.dmactrlflags & DMA_CTRL_PEN) { - if (DMA64_DD_PARITY(&ddring[outidx])) + if (dma64_dd_parity(&ddring[outidx])) ddring[outidx].ctrl2 = cpu_to_le32(ctrl2 | D64_CTRL2_PARITY); } @@ -866,7 +887,7 @@ static struct sk_buff *dma64_getnextrxp(struct dma_info *di, bool forceall) di->rxd64[i].addrlow = 0xdeadbeef; di->rxd64[i].addrhigh = 0xdeadbeef; - di->rxin = NEXTRXD(i); + di->rxin = nextrxd(di, i); return rxp; } @@ -988,7 +1009,7 @@ bool dma_rxfill(struct dma_pub *pub) rxin = di->rxin; rxout = di->rxout; - n = di->nrxpost - NRXDACTIVE(rxin, rxout); + n = di->nrxpost - nrxdactive(di, rxin, rxout); DMA_TRACE(("%s: dma_rxfill: post %d\n", di->name, n)); @@ -1035,7 +1056,7 @@ bool dma_rxfill(struct dma_pub *pub) dma64_dd_upd(di, di->rxd64, pa, rxout, &flags, di->rxbufsize); - rxout = NEXTRXD(rxout); + rxout = nextrxd(di, rxout); } di->rxout = rxout; @@ -1237,7 +1258,7 @@ int dma_txfast(struct dma_pub *pub, struct sk_buff *p0, bool commit) next = p->next; /* return nonzero if out of tx descriptors */ - if (NEXTTXD(txout) == di->txin) + if (nexttxd(di, txout) == di->txin) goto outoftxd; if (len == 0) @@ -1262,16 +1283,16 @@ int dma_txfast(struct dma_pub *pub, struct sk_buff *p0, bool commit) dma64_dd_upd(di, di->txd64, pa, txout, &flags, len); - txout = NEXTTXD(txout); + txout = nexttxd(di, txout); } /* if last txd eof not set, fix it */ if (!(flags & D64_CTRL1_EOF)) - di->txd64[PREVTXD(txout)].ctrl1 = + di->txd64[prevtxd(di, txout)].ctrl1 = cpu_to_le32(flags | D64_CTRL1_IOC | D64_CTRL1_EOF); /* save the packet */ - di->txp[PREVTXD(txout)] = p0; + di->txp[prevtxd(di, txout)] = p0; /* bump the tx descriptor index */ di->txout = txout; @@ -1282,7 +1303,7 @@ int dma_txfast(struct dma_pub *pub, struct sk_buff *p0, bool commit) di->xmtptrbase + I2B(txout, struct dma64desc)); /* tx flow control */ - di->dma.txavail = di->ntxd - NTXDACTIVE(di->txin, di->txout) - 1; + di->dma.txavail = di->ntxd - ntxdactive(di, di->txin, di->txout) - 1; return 0; @@ -1341,14 +1362,14 @@ struct sk_buff *dma_getnexttxp(struct dma_pub *pub, enum txd_range range) (active_desc - di->xmtptrbase) & D64_XS0_CD_MASK; active_desc = B2I(active_desc, struct dma64desc); if (end != active_desc) - end = PREVTXD(active_desc); + end = prevtxd(di, active_desc); } } if ((start == 0) && (end > di->txout)) goto bogus; - for (i = start; i != end && !txp; i = NEXTTXD(i)) { + for (i = start; i != end && !txp; i = nexttxd(di, i)) { dma_addr_t pa; uint size; @@ -1370,7 +1391,7 @@ struct sk_buff *dma_getnexttxp(struct dma_pub *pub, enum txd_range range) di->txin = i; /* tx flow control */ - di->dma.txavail = di->ntxd - NTXDACTIVE(di->txin, di->txout) - 1; + di->dma.txavail = di->ntxd - ntxdactive(di, di->txin, di->txout) - 1; return txp; @@ -1401,6 +1422,6 @@ void dma_walk_packets(struct dma_pub *dmah, void (*callback_fnc) tx_info = (struct ieee80211_tx_info *)skb->cb; (callback_fnc)(tx_info, arg_a); } - i = NEXTTXD(i); + i = nexttxd(di, i); } }