diff options
| author |   Bryan O'Sullivan <bos@pathscale.com> | 2006-08-25 11:24:26 -0700 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2006-09-22 15:22:26 -0700 |
| commit | eb9dc6f48dc7537ce53163109625bd992150e0cf (patch) | |
| tree | c452c01196bc47b266faec728da87ac5539316e4 /drivers/infiniband/hw/ipath/ipath_file_ops.c | |
| parent | IB/ipath: Performance improvements via mmap of queues (diff) | |
| download | linux-dev-eb9dc6f48dc7537ce53163109625bd992150e0cf.tar.xz linux-dev-eb9dc6f48dc7537ce53163109625bd992150e0cf.zip | |
IB/ipath: More changes to support InfiniPath on PowerPC 970 systems
Ordering of writethrough store buffers needs to be forced, and we need
to use ifdef to get writethrough behavior to InfiniPath buffers, because
there is no generic way to specify that at this time (similar to code
in char/drm/drm_vm.c and block/z2ram.c).
Signed-off-by: John Gregor <john.gregor@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_file_ops.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_file_ops.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c index bbaa70e57db1..0b6e7679eefd 100644 --- a/drivers/infiniband/hw/ipath/ipath_file_ops.c +++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c @@ -985,6 +985,13 @@ static int mmap_piobufs(struct vm_area_struct *vma, * write combining behavior we want on the PIO buffers! */ +#if defined(__powerpc__) + /* There isn't a generic way to specify writethrough mappings */ + pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; + pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; + pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; +#endif + if (vma->vm_flags & VM_READ) { dev_info(&dd->pcidev->dev, "Can't map piobufs as readable (flags=%lx)\n", |