diff options
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bgmac.c | 38 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/bgmac.h | 2 |
2 files changed, 30 insertions, 10 deletions
diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index 59f3e0ce56d..249468f9536 100644 --- a/drivers/net/ethernet/broadcom/bgmac.c +++ b/drivers/net/ethernet/broadcom/bgmac.c @@ -157,6 +157,7 @@ static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac, if (++ring->end >= BGMAC_TX_RING_SLOTS) ring->end = 0; bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX, + ring->index_base + ring->end * sizeof(struct bgmac_dma_desc)); /* Always keep one slot free to allow detecting bugged calls. */ @@ -181,6 +182,8 @@ static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring) /* The last slot that hardware didn't consume yet */ empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); empty_slot &= BGMAC_DMA_TX_STATDPTR; + empty_slot -= ring->index_base; + empty_slot &= BGMAC_DMA_TX_STATDPTR; empty_slot /= sizeof(struct bgmac_dma_desc); while (ring->start != empty_slot) { @@ -274,6 +277,8 @@ static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS); end_slot &= BGMAC_DMA_RX_STATDPTR; + end_slot -= ring->index_base; + end_slot &= BGMAC_DMA_RX_STATDPTR; end_slot /= sizeof(struct bgmac_dma_desc); ring->end = end_slot; @@ -418,9 +423,6 @@ static int bgmac_dma_alloc(struct bgmac *bgmac) ring = &bgmac->tx_ring[i]; ring->num_slots = BGMAC_TX_RING_SLOTS; ring->mmio_base = ring_base[i]; - if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_TX)) - bgmac_warn(bgmac, "TX on ring 0x%X supports unaligned addressing but this feature is not implemented\n", - ring->mmio_base); /* Alloc ring of descriptors */ size = ring->num_slots * sizeof(struct bgmac_dma_desc); @@ -435,6 +437,13 @@ static int bgmac_dma_alloc(struct bgmac *bgmac) if (ring->dma_base & 0xC0000000) bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); + ring->unaligned = bgmac_dma_unaligned(bgmac, ring, + BGMAC_DMA_RING_TX); + if (ring->unaligned) + ring->index_base = lower_32_bits(ring->dma_base); + else + ring->index_base = 0; + /* No need to alloc TX slots yet */ } @@ -444,9 +453,6 @@ static int bgmac_dma_alloc(struct bgmac *bgmac) ring = &bgmac->rx_ring[i]; ring->num_slots = BGMAC_RX_RING_SLOTS; ring->mmio_base = ring_base[i]; - if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_RX)) - bgmac_warn(bgmac, "RX on ring 0x%X supports unaligned addressing but this feature is not implemented\n", - ring->mmio_base); /* Alloc ring of descriptors */ size = ring->num_slots * sizeof(struct bgmac_dma_desc); @@ -462,6 +468,13 @@ static int bgmac_dma_alloc(struct bgmac *bgmac) if (ring->dma_base & 0xC0000000) bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); + ring->unaligned = bgmac_dma_unaligned(bgmac, ring, + BGMAC_DMA_RING_RX); + if (ring->unaligned) + ring->index_base = lower_32_bits(ring->dma_base); + else + ring->index_base = 0; + /* Alloc RX slots */ for (j = 0; j < ring->num_slots; j++) { err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]); @@ -489,12 +502,14 @@ static void bgmac_dma_init(struct bgmac *bgmac) for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { ring = &bgmac->tx_ring[i]; - /* We don't implement unaligned addressing, so enable first */ - bgmac_dma_tx_enable(bgmac, ring); + if (!ring->unaligned) + bgmac_dma_tx_enable(bgmac, ring); bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, lower_32_bits(ring->dma_base)); bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI, upper_32_bits(ring->dma_base)); + if (ring->unaligned) + bgmac_dma_tx_enable(bgmac, ring); ring->start = 0; ring->end = 0; /* Points the slot that should *not* be read */ @@ -505,12 +520,14 @@ static void bgmac_dma_init(struct bgmac *bgmac) ring = &bgmac->rx_ring[i]; - /* We don't implement unaligned addressing, so enable first */ - bgmac_dma_rx_enable(bgmac, ring); + if (!ring->unaligned) + bgmac_dma_rx_enable(bgmac, ring); bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, lower_32_bits(ring->dma_base)); bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI, upper_32_bits(ring->dma_base)); + if (ring->unaligned) + bgmac_dma_rx_enable(bgmac, ring); for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots; j++, dma_desc++) { @@ -531,6 +548,7 @@ static void bgmac_dma_init(struct bgmac *bgmac) } bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX, + ring->index_base + ring->num_slots * sizeof(struct bgmac_dma_desc)); ring->start = 0; diff --git a/drivers/net/ethernet/broadcom/bgmac.h b/drivers/net/ethernet/broadcom/bgmac.h index 12a35cf9bb8..66c8afbdc8c 100644 --- a/drivers/net/ethernet/broadcom/bgmac.h +++ b/drivers/net/ethernet/broadcom/bgmac.h @@ -384,6 +384,8 @@ struct bgmac_dma_ring { u16 mmio_base; struct bgmac_dma_desc *cpu_base; dma_addr_t dma_base; + u32 index_base; /* Used for unaligned rings only, otherwise 0 */ + bool unaligned; struct bgmac_slot_info slots[BGMAC_RX_RING_SLOTS]; }; |