diff options
| author | Olof Johansson <olof@lixom.net> | 2007-10-03 13:03:54 -0500 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:54:30 -0700 |
| commit | af289e803fdf2fcd19cf4a57c3c896dba146c756 (patch) | |
| tree | 038fe6e9a32ed958450bf0bd33227a3c23342ae8 /drivers/net/pasemi_mac.c | |
| parent | 9ddf7774b9d760dc3fa4d5ae7d7fd92d4c02150b (diff) | |
pasemi_mac: enable iommu support
pasemi_mac: enable iommu support
Enable IOMMU support for pasemi_mac, but avoid using it on non-partitioned
systems for performance reasons.
The user can override this by selecting the PPC_PASEMI_IOMMU_DMA_FORCE
configuration option.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/pasemi_mac.c')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 50 |
1 files changed, 37 insertions, 13 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c index 31ad2b9093a7..9f9a421c99b3 100644 --- a/drivers/net/pasemi_mac.c +++ b/drivers/net/pasemi_mac.c @@ -34,6 +34,7 @@ #include <net/checksum.h> #include <asm/irq.h> +#include <asm/firmware.h> #include "pasemi_mac.h" @@ -89,6 +90,15 @@ MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value"); static struct pasdma_status *dma_status; +static int translation_enabled(void) +{ +#if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE) + return 1; +#else + return firmware_has_feature(FW_FEATURE_LPAR); +#endif +} + static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg, unsigned int val) { @@ -193,6 +203,7 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev) struct pasemi_mac_rxring *ring; struct pasemi_mac *mac = netdev_priv(dev); int chan_id = mac->dma_rxch; + unsigned int cfg; ring = kzalloc(sizeof(*ring), GFP_KERNEL); @@ -232,20 +243,28 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev) PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) | PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3)); - write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id), - PAS_DMA_RXCHAN_CFG_HBU(2)); + cfg = PAS_DMA_RXCHAN_CFG_HBU(2); + + if (translation_enabled()) + cfg |= PAS_DMA_RXCHAN_CFG_CTR; + + write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id), cfg); write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if), - PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers))); + PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma)); write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if), - PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) | + PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) | PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); - write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if), - PAS_DMA_RXINT_CFG_DHL(3) | PAS_DMA_RXINT_CFG_L2 | - PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP | - PAS_DMA_RXINT_CFG_HEN); + cfg = PAS_DMA_RXINT_CFG_DHL(3) | PAS_DMA_RXINT_CFG_L2 | + PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP | + PAS_DMA_RXINT_CFG_HEN; + + if (translation_enabled()) + cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR; + + write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if), cfg); ring->next_to_fill = 0; ring->next_to_clean = 0; @@ -275,6 +294,7 @@ static int pasemi_mac_setup_tx_resources(struct net_device *dev) u32 val; int chan_id = mac->dma_txch; struct pasemi_mac_txring *ring; + unsigned int cfg; ring = kzalloc(sizeof(*ring), GFP_KERNEL); if (!ring) @@ -304,11 +324,15 @@ static int pasemi_mac_setup_tx_resources(struct net_device *dev) write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val); - write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id), - PAS_DMA_TXCHAN_CFG_TY_IFACE | - PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) | - PAS_DMA_TXCHAN_CFG_UP | - PAS_DMA_TXCHAN_CFG_WT(2)); + cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE | + PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) | + PAS_DMA_TXCHAN_CFG_UP | + PAS_DMA_TXCHAN_CFG_WT(2); + + if (translation_enabled()) + cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR; + + write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id), cfg); ring->next_to_fill = 0; ring->next_to_clean = 0; |