aboutsummaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-11-11 01:25:13 -0500
committerPaul Mackerras <paulus@samba.org>2006-12-04 04:38:55 -0500
commit3bc0f40c287a435805b0545ffc44ea41f11cd43e (patch)
treea30860fe647dc7acc674d3da149aad22d6150b24 /drivers
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>
Diffstat (limited to 'drivers')
-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 cef7e6671c49..13e0a43e423b 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);
88static inline u32 88static inline u32
89spider_net_read_reg(struct spider_net_card *card, u32 reg) 89spider_net_read_reg(struct spider_net_card *card, u32 reg)
90{ 90{
91 u32 value; 91 /* We use the powerpc specific variants instead of readl_be() because
92 92 * we know spidernet is not a real PCI device and we can thus avoid the
93 value = readl(card->regs + reg); 93 * performance hit caused by the PCI workarounds.
94 value = le32_to_cpu(value); 94 */
95 95 return in_be32(card->regs + reg);
96 return value;
97} 96}
98 97
99/** 98/**
@@ -105,8 +104,11 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg)
105static inline void 104static inline void
106spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) 105spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
107{ 106{
108 value = cpu_to_le32(value); 107 /* We use the powerpc specific variants instead of writel_be() because
109 writel(value, card->regs + reg); 108 * we know spidernet is not a real PCI device and we can thus avoid the
109 * performance hit caused by the PCI workarounds.
110 */
111 out_be32(card->regs + reg, value);
110} 112}
111 113
112/** spider_net_write_phy - write to phy register 114/** spider_net_write_phy - write to phy register