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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_file_ops.c
View File

@ -169,7 +169,7 @@ static int ipath_get_base_info(struct file *fp,
kinfo->spi_piocnt = dd->ipath_pbufsport;
kinfo->spi_piobufbase = (u64) pd->port_piobufs;
kinfo->__spi_uregbase = (u64) dd->ipath_uregbase +
dd->ipath_palign * pd->port_port;
dd->ipath_ureg_align * pd->port_port;
} else if (master) {
kinfo->spi_piocnt = (dd->ipath_pbufsport / subport_cnt) +
(dd->ipath_pbufsport % subport_cnt);
@ -186,7 +186,7 @@ static int ipath_get_base_info(struct file *fp,
}
if (shared) {
kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase +
dd->ipath_palign * pd->port_port;
dd->ipath_ureg_align * pd->port_port;
kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs;
kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base;
kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr;
@ -1271,7 +1271,7 @@ static int ipath_mmap(struct file *fp, struct vm_area_struct *vma)
goto bail;
}
ureg = dd->ipath_uregbase + dd->ipath_palign * pd->port_port;
ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port;
if (!pd->port_subport_cnt) {
/* port is not shared */
piocnt = dd->ipath_pbufsport;

7
drivers/infiniband/hw/ipath/ipath_iba6110.c
View File

@ -739,6 +739,13 @@ static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
dd->ipath_htspeed);
ret = 0;
/*
* set here, not in ipath_init_*_funcs because we have to do
* it after we can read chip registers.
*/
dd->ipath_ureg_align =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
bail:
return ret;
}

8
drivers/infiniband/hw/ipath/ipath_iba6120.c
View File

@ -613,6 +613,14 @@ static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
dd->ipath_f_put_tid = ipath_pe_put_tid_2;
}
/*
* set here, not in ipath_init_*_funcs because we have to do
* it after we can read chip registers.
*/
dd->ipath_ureg_align =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
return ret;
}

6
drivers/infiniband/hw/ipath/ipath_kernel.h
View File

@ -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]);
}