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if_dwc: Simplify tx desc setup

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This commit is contained in:
Sebastian Huber
2015-03-30 11:51:36 +02:00
parent dd1feda161
commit 822aa5dee2
1 changed files with 9 additions and 25 deletions
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34
freebsd/sys/dev/dwc/if_dwc.c
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@@ -242,32 +242,17 @@ inline static uint32_t
dwc_setup_txdesc(struct dwc_softc *sc, int idx, bus_addr_t paddr,
uint32_t len)
{
uint32_t flags;
uint32_t nidx;
nidx = next_txidx(sc, idx);
/* Addr/len 0 means we're clearing the descriptor after xmit done. */
if (paddr == 0 || len == 0) {
flags = 0;
--sc->txcount;
} else {
flags = DDESC_TDES0_TXCHAIN | DDESC_TDES0_TXFIRST
| DDESC_TDES0_TXLAST | DDESC_TDES0_TXINT;
++sc->txcount;
}
++sc->txcount;
sc->txdesc_ring[idx].addr = (uint32_t)(paddr);
sc->txdesc_ring[idx].tdes0 = flags;
sc->txdesc_ring[idx].tdes1 = len;
wmb();
if (paddr && len) {
wmb();
sc->txdesc_ring[idx].tdes0 |= DDESC_TDES0_OWN;
wmb();
}
sc->txdesc_ring[idx].tdes0 = DDESC_TDES0_TXCHAIN | DDESC_TDES0_TXFIRST
| DDESC_TDES0_TXLAST | DDESC_TDES0_TXINT | DDESC_TDES0_OWN;
wmb();
return (nidx);
return (next_txidx(sc, idx));
}
static int
@@ -817,7 +802,7 @@ dwc_txfinish_locked(struct dwc_softc *sc)
#endif /* __rtems__ */
m_freem(bmap->mbuf);
bmap->mbuf = NULL;
dwc_setup_txdesc(sc, sc->tx_idx_tail, 0, 0);
--sc->txcount;
sc->tx_idx_tail = next_txidx(sc, sc->tx_idx_tail);
}
@@ -981,6 +966,7 @@ setup_dma(struct dwc_softc *sc)
#endif /* __rtems__ */
for (idx = 0; idx < TX_DESC_COUNT; idx++) {
sc->txdesc_ring[idx].addr = 0;
sc->txdesc_ring[idx].tdes0 = DDESC_TDES0_TXCHAIN;
sc->txdesc_ring[idx].tdes1 = 0;
nidx = next_txidx(sc, idx);
@@ -1022,7 +1008,6 @@ setup_dma(struct dwc_softc *sc)
goto out;
}
#endif /* __rtems__ */
dwc_setup_txdesc(sc, idx, 0, 0);
}
/*
@@ -1186,8 +1171,7 @@ dwc_attach(device_t dev)
sc->dev = dev;
sc->mii_clk = MII_CLK_VAL;
sc->rx_idx = 0;
sc->txcount = TX_DESC_COUNT;
sc->txcount = 0;
if (bus_alloc_resources(dev, dwc_spec, sc->res)) {
device_printf(dev, "could not allocate resources\n");