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IB/ipath: Allow more flexible user register alignments

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User registers have different alignments on different chips (4KB on
older, 64KB on 7220).  Allow mapping the user registers on kernels with
page sizes up to 64K.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ralph Campbell
2008-01-06 21:02:34 -08:00
committed by Roland Dreier
parent 9e2ef36b5a
commit a18e26ae44
4 changed files with 22 additions and 5 deletions
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6
drivers/infiniband/hw/ipath/ipath_kernel.h
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@@ -395,6 +395,8 @@ struct ipath_devdata {
void *ipath_dummy_hdrq; /* used after port close */
dma_addr_t ipath_dummy_hdrq_phys;
unsigned long ipath_ureg_align; /* user register alignment */
/*
* Shadow copies of registers; size indicates read access size.
* Most of them are readonly, but some are write-only register,
@@ -865,7 +867,7 @@ static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd,
return readl(regno + (u64 __iomem *)
(dd->ipath_uregbase +
(char __iomem *)dd->ipath_kregbase +
dd->ipath_palign * port));
dd->ipath_ureg_align * port));
}
/**
@@ -882,7 +884,7 @@ static inline void ipath_write_ureg(const struct ipath_devdata *dd,
{
u64 __iomem *ubase = (u64 __iomem *)
(dd->ipath_uregbase + (char __iomem *) dd->ipath_kregbase +
dd->ipath_palign * port);
dd->ipath_ureg_align * port);
if (dd->ipath_kregbase)
writeq(value, &ubase[regno]);
}