On Mon, 2017-04-24 at 10:25 -0700, Sukadev Bhattiprolu wrote:
> which maybe due to this :-) Should I change to pgprot_noncached() for
> the MMIO writes?
Just use normal ioremap().
> > requires being mapped cachable. Ask Aneesh for a cleaner way of
> > doing it too while at it.
On Mon, 2017-04-24 at 10:25 -0700, Sukadev Bhattiprolu wrote:
> which maybe due to this :-) Should I change to pgprot_noncached() for
> the MMIO writes?
Just use normal ioremap().
> > requires being mapped cachable. Ask Aneesh for a cleaner way of
> > doing it too while at it.
Benjamin Herrenschmidt [b...@kernel.crashing.org] wrote:
> On Thu, 2017-03-30 at 22:13 -0700, Sukadev Bhattiprolu wrote:
> > +static void *map_mmio_region(char *name, uint64_t start, int len)
> > +{
> > + void *map;
> > +
> > + if (!request_mem_region(start, len, name)) {
> > +
Benjamin Herrenschmidt [b...@kernel.crashing.org] wrote:
> On Thu, 2017-03-30 at 22:13 -0700, Sukadev Bhattiprolu wrote:
> > +static void *map_mmio_region(char *name, uint64_t start, int len)
> > +{
> > + void *map;
> > +
> > + if (!request_mem_region(start, len, name)) {
> > +
On Thu, 2017-03-30 at 22:13 -0700, Sukadev Bhattiprolu wrote:
> +static void *map_mmio_region(char *name, uint64_t start, int len)
> +{
> + void *map;
> +
> + if (!request_mem_region(start, len, name)) {
> + pr_devel("%s(): request_mem_region(0x%llx, %d) failed\n",
> +
On Thu, 2017-03-30 at 22:13 -0700, Sukadev Bhattiprolu wrote:
> +static void *map_mmio_region(char *name, uint64_t start, int len)
> +{
> + void *map;
> +
> + if (!request_mem_region(start, len, name)) {
> + pr_devel("%s(): request_mem_region(0x%llx, %d) failed\n",
> +
Define some helper functions to access the MMIO regions. We use these
in a follow-on patches to read/write VAS hardware registers. These
helpers are also used to later issue 'paste' instructions to submit
requests to the NX hardware engines.
Signed-off-by: Sukadev Bhattiprolu
Define some helper functions to access the MMIO regions. We use these
in a follow-on patches to read/write VAS hardware registers. These
helpers are also used to later issue 'paste' instructions to submit
requests to the NX hardware engines.
Signed-off-by: Sukadev Bhattiprolu
---
Changelog [v3]:
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