Quoting Lionel Landwerlin (2019-11-21 12:04:42)
> On 13/11/2019 14:52, Chris Wilson wrote:
> > Several tests depend upon the implicit engine->mmio_base but have no
> > means of determining the physical layout. Since the kernel has started
> > providing this information, start putting it to use.
> >
> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> > ---
> > lib/i915/gem_engine_topology.c | 84 ++++++++++++++++++++++++++++++++++
> > lib/i915/gem_engine_topology.h | 5 ++
> > tests/i915/gem_ctx_shared.c | 38 +++++----------
> > tests/i915/gem_exec_latency.c | 17 ++++---
> > 4 files changed, 111 insertions(+), 33 deletions(-)
> >
> > diff --git a/lib/i915/gem_engine_topology.c b/lib/i915/gem_engine_topology.c
> > index 790d455ff..bd200a4b9 100644
> > --- a/lib/i915/gem_engine_topology.c
> > +++ b/lib/i915/gem_engine_topology.c
> > @@ -21,7 +21,12 @@
> > * IN THE SOFTWARE.
> > */
> >
> > +#include <fcntl.h>
> > +#include <unistd.h>
> > +
> > #include "drmtest.h"
> > +#include "igt_sysfs.h"
> > +#include "intel_chipset.h"
> > #include "ioctl_wrappers.h"
> >
> > #include "i915/gem_engine_topology.h"
> > @@ -337,3 +342,82 @@ bool gem_engine_is_equal(const struct intel_execution_engine2 *e1,
> > {
> > return e1->class == e2->class && e1->instance == e2->instance;
> > }
> > +
> > +static int descend(int dir, const char *path)
> > +{
> > + int fd;
> > +
> > + fd = openat(dir, path, O_RDONLY);
> > + close(dir);
> > +
> > + return fd;
> > +}
> > +
>
>
> Not sure I understand what file the function below is supposed to parse.
>
> Is that /sys/kernel/debug/dri/0/i915_engine_info?
/sys/class/drm/card0/engine/*/mmio_base
-Chris
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