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if_cgem: Use explicit cache operations

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This commit is contained in:
Sebastian Huber 2014-11-25 12:54:35 +01:00
parent cd179c472b
commit 911f517d2d
1 changed files with 72 additions and 0 deletions
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72
freebsd/sys/dev/cadence/if_cgem.c
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@ -126,7 +126,9 @@ struct cgem_softc {
struct cgem_rx_desc volatile *rxring;
bus_addr_t rxring_physaddr;
struct mbuf *rxring_m[CGEM_NUM_RX_DESCS];
#ifndef __rtems__
bus_dmamap_t rxring_m_dmamap[CGEM_NUM_RX_DESCS];
#endif /* __rtems__ */
int rxring_hd_ptr; /* where to put rcv bufs */
int rxring_tl_ptr; /* where to get receives */
int rxring_queued; /* how many rcv bufs queued */
@ -142,7 +144,9 @@ struct cgem_softc {
struct cgem_tx_desc volatile *txring;
bus_addr_t txring_physaddr;
struct mbuf *txring_m[CGEM_NUM_TX_DESCS];
#ifndef __rtems__
bus_dmamap_t txring_m_dmamap[CGEM_NUM_TX_DESCS];
#endif /* __rtems__ */
int txring_hd_ptr; /* where to put next xmits */
int txring_tl_ptr; /* next xmit mbuf to free */
int txring_queued; /* num xmits segs queued */
@ -425,10 +429,12 @@ cgem_setup_descs(struct cgem_softc *sc)
sc->rxring[i].addr = CGEM_RXDESC_OWN;
sc->rxring[i].ctl = 0;
sc->rxring_m[i] = NULL;
#ifndef __rtems__
err = bus_dmamap_create(sc->mbuf_dma_tag, 0,
&sc->rxring_m_dmamap[i]);
if (err)
return (err);
#endif /* __rtems__ */
}
sc->rxring[CGEM_NUM_RX_DESCS - 1].addr |= CGEM_RXDESC_WRAP;
@ -458,10 +464,12 @@ cgem_setup_descs(struct cgem_softc *sc)
sc->txring[i].addr = 0;
sc->txring[i].ctl = CGEM_TXDESC_USED;
sc->txring_m[i] = NULL;
#ifndef __rtems__
err = bus_dmamap_create(sc->mbuf_dma_tag, 0,
&sc->txring_m_dmamap[i]);
if (err)
return (err);
#endif /* __rtems__ */
}
sc->txring[CGEM_NUM_TX_DESCS - 1].ctl |= CGEM_TXDESC_WRAP;
@ -477,8 +485,12 @@ static void
cgem_fill_rqueue(struct cgem_softc *sc)
{
struct mbuf *m = NULL;
#ifndef __rtems__
bus_dma_segment_t segs[TX_MAX_DMA_SEGS];
int nsegs;
#else /* __rtems__ */
bus_dma_segment_t segs[1];
#endif /* __rtems__ */
CGEM_ASSERT_LOCKED(sc);
@ -492,6 +504,7 @@ cgem_fill_rqueue(struct cgem_softc *sc)
m->m_pkthdr.len = MCLBYTES;
m->m_pkthdr.rcvif = sc->ifp;
#ifndef __rtems__
/* Load map and plug in physical address. */
if (bus_dmamap_load_mbuf_sg(sc->mbuf_dma_tag,
sc->rxring_m_dmamap[sc->rxring_hd_ptr], m,
@ -500,12 +513,18 @@ cgem_fill_rqueue(struct cgem_softc *sc)
m_free(m);
break;
}
#endif /* __rtems__ */
sc->rxring_m[sc->rxring_hd_ptr] = m;
#ifndef __rtems__
/* Sync cache with receive buffer. */
bus_dmamap_sync(sc->mbuf_dma_tag,
sc->rxring_m_dmamap[sc->rxring_hd_ptr],
BUS_DMASYNC_PREREAD);
#else /* __rtems__ */
rtems_cache_invalidate_multiple_data_lines(m->m_data, m->m_len);
segs[0].ds_addr = mtod(m, bus_addr_t);
#endif /* __rtems__ */
/* Write rx descriptor and increment head pointer. */
sc->rxring[sc->rxring_hd_ptr].ctl = 0;
@ -542,6 +561,7 @@ cgem_recv(struct cgem_softc *sc)
m = sc->rxring_m[sc->rxring_tl_ptr];
sc->rxring_m[sc->rxring_tl_ptr] = NULL;
#ifndef __rtems__
/* Sync cache with receive buffer. */
bus_dmamap_sync(sc->mbuf_dma_tag,
sc->rxring_m_dmamap[sc->rxring_tl_ptr],
@ -550,6 +570,9 @@ cgem_recv(struct cgem_softc *sc)
/* Unload dmamap. */
bus_dmamap_unload(sc->mbuf_dma_tag,
sc->rxring_m_dmamap[sc->rxring_tl_ptr]);
#else /* __rtems__ */
rtems_cache_invalidate_multiple_data_lines(m->m_data, m->m_len);
#endif /* __rtems__ */
/* Increment tail pointer. */
if (++sc->rxring_tl_ptr == CGEM_NUM_RX_DESCS)
@ -639,6 +662,7 @@ cgem_clean_tx(struct cgem_softc *sc)
((ctl = sc->txring[sc->txring_tl_ptr].ctl) &
CGEM_TXDESC_USED) != 0) {
#ifndef __rtems__
/* Sync cache. nop? */
bus_dmamap_sync(sc->mbuf_dma_tag,
sc->txring_m_dmamap[sc->txring_tl_ptr],
@ -647,6 +671,7 @@ cgem_clean_tx(struct cgem_softc *sc)
/* Unload DMA map. */
bus_dmamap_unload(sc->mbuf_dma_tag,
sc->txring_m_dmamap[sc->txring_tl_ptr]);
#endif /* __rtems__ */
/* Free up the mbuf. */
m = sc->txring_m[sc->txring_tl_ptr];
@ -701,6 +726,33 @@ cgem_clean_tx(struct cgem_softc *sc)
}
}
#ifdef __rtems__
static int
cgem_get_segs_for_tx(struct mbuf *m, bus_dma_segment_t segs[TX_MAX_DMA_SEGS],
int *nsegs)
{
int i = 0;
do {
if (m->m_len > 0) {
segs[i].ds_addr = mtod(m, bus_addr_t);
segs[i].ds_len = m->m_len;
rtems_cache_flush_multiple_data_lines(m->m_data, m->m_len);
++i;
}
m = m->m_next;
if (m == NULL) {
*nsegs = i;
return (0);
}
} while (i < TX_MAX_DMA_SEGS);
return (EFBIG);
}
#endif /* __rtems__ */
/* Start transmits. */
static void
cgem_start_locked(struct ifnet *ifp)
@ -738,10 +790,14 @@ cgem_start_locked(struct ifnet *ifp)
if (m == NULL)
break;
#ifndef __rtems__
/* Load DMA map. */
err = bus_dmamap_load_mbuf_sg(sc->mbuf_dma_tag,
sc->txring_m_dmamap[sc->txring_hd_ptr],
m, segs, &nsegs, BUS_DMA_NOWAIT);
#else /* __rtems__ */
err = cgem_get_segs_for_tx(m, segs, &nsegs);
#endif /* __rtems__ */
if (err == EFBIG) {
/* Too many segments! defrag and try again. */
struct mbuf *m2 = m_defrag(m, M_NOWAIT);
@ -752,9 +808,13 @@ cgem_start_locked(struct ifnet *ifp)
continue;
}
m = m2;
#ifndef __rtems__
err = bus_dmamap_load_mbuf_sg(sc->mbuf_dma_tag,
sc->txring_m_dmamap[sc->txring_hd_ptr],
m, segs, &nsegs, BUS_DMA_NOWAIT);
#else /* __rtems__ */
err = cgem_get_segs_for_tx(m, segs, &nsegs);
#endif /* __rtems__ */
sc->txdefrags++;
}
if (err) {
@ -765,10 +825,12 @@ cgem_start_locked(struct ifnet *ifp)
}
sc->txring_m[sc->txring_hd_ptr] = m;
#ifndef __rtems__
/* Sync tx buffer with cache. */
bus_dmamap_sync(sc->mbuf_dma_tag,
sc->txring_m_dmamap[sc->txring_hd_ptr],
BUS_DMASYNC_PREWRITE);
#endif /* __rtems__ */
/* Set wrap flag if next packet might run off end of ring. */
wrap = sc->txring_hd_ptr + nsegs + TX_MAX_DMA_SEGS >=
@ -1127,8 +1189,10 @@ cgem_stop(struct cgem_softc *sc)
sc->txring[i].ctl = CGEM_TXDESC_USED;
sc->txring[i].addr = 0;
if (sc->txring_m[i]) {
#ifndef __rtems__
bus_dmamap_unload(sc->mbuf_dma_tag,
sc->txring_m_dmamap[i]);
#endif /* __rtems__ */
m_freem(sc->txring_m[i]);
sc->txring_m[i] = NULL;
}
@ -1144,9 +1208,11 @@ cgem_stop(struct cgem_softc *sc)
sc->rxring[i].addr = CGEM_RXDESC_OWN;
sc->rxring[i].ctl = 0;
if (sc->rxring_m[i]) {
#ifndef __rtems__
/* Unload dmamap. */
bus_dmamap_unload(sc->mbuf_dma_tag,
sc->rxring_m_dmamap[sc->rxring_tl_ptr]);
#endif /* __rtems__ */
m_freem(sc->rxring_m[i]);
sc->rxring_m[i] = NULL;
@ -1765,7 +1831,9 @@ static int
cgem_detach(device_t dev)
{
struct cgem_softc *sc = device_get_softc(dev);
#ifndef __rtems__
int i;
#endif /* __rtems__ */
if (sc == NULL)
return (ENODEV);
@ -1807,12 +1875,14 @@ cgem_detach(device_t dev)
bus_dmamem_free(sc->desc_dma_tag, __DEVOLATILE(void *, sc->rxring),
sc->rxring_dma_map);
sc->rxring = NULL;
#ifndef __rtems__
for (i = 0; i < CGEM_NUM_RX_DESCS; i++)
if (sc->rxring_m_dmamap[i] != NULL) {
bus_dmamap_destroy(sc->mbuf_dma_tag,
sc->rxring_m_dmamap[i]);
sc->rxring_m_dmamap[i] = NULL;
}
#endif /* __rtems__ */
}
if (sc->txring != NULL) {
if (sc->txring_physaddr != 0) {
@ -1822,12 +1892,14 @@ cgem_detach(device_t dev)
bus_dmamem_free(sc->desc_dma_tag, __DEVOLATILE(void *, sc->txring),
sc->txring_dma_map);
sc->txring = NULL;
#ifndef __rtems__
for (i = 0; i < CGEM_NUM_TX_DESCS; i++)
if (sc->txring_m_dmamap[i] != NULL) {
bus_dmamap_destroy(sc->mbuf_dma_tag,
sc->txring_m_dmamap[i]);
sc->txring_m_dmamap[i] = NULL;
}
#endif /* __rtems__ */
}
if (sc->desc_dma_tag != NULL) {
bus_dma_tag_destroy(sc->desc_dma_tag);