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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-11-11 17:25:13 +1100
committerPaul Mackerras <paulus@samba.org>2006-12-04 20:38:55 +1100
commit3bc0f40c287a435805b0545ffc44ea41f11cd43e (patch)
treea30860fe647dc7acc674d3da149aad22d6150b24
parent014da7ff47b559e5f0ae3e044b73f0359c08153d (diff)
[POWERPC] Spider uses low level BE MMIO accessors
We use the powerpc specific low level MMIO accessor variants instead of readl() or readl_be() because we know spidernet is not a real PCI device and we can thus avoid the performance hit caused by the PCI workarounds. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--drivers/net/spider_net.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index cef7e6671c4..13e0a43e423 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -88,12 +88,11 @@ MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
static inline u32
spider_net_read_reg(struct spider_net_card *card, u32 reg)
{
- u32 value;
-
- value = readl(card->regs + reg);
- value = le32_to_cpu(value);
-
- return value;
+ /* We use the powerpc specific variants instead of readl_be() because
+ * we know spidernet is not a real PCI device and we can thus avoid the
+ * performance hit caused by the PCI workarounds.
+ */
+ return in_be32(card->regs + reg);
}
/**
@@ -105,8 +104,11 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg)
static inline void
spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
{
- value = cpu_to_le32(value);
- writel(value, card->regs + reg);
+ /* We use the powerpc specific variants instead of writel_be() because
+ * we know spidernet is not a real PCI device and we can thus avoid the
+ * performance hit caused by the PCI workarounds.
+ */
+ out_be32(card->regs + reg, value);
}
/** spider_net_write_phy - write to phy register