lib: Cache static queries

We frequently check for device capabilities, for which we can safely
assume that there is but one on a system and so cache the first query
value and return it for all future queries. The benefit is to reduce
dmesg debug spam which helps when either bringing up a test or trying to
track down why a test fails.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/ioctl_wrappers.h b/lib/ioctl_wrappers.h
index 71875805..901888f9 100644
--- a/lib/ioctl_wrappers.h
+++ b/lib/ioctl_wrappers.h
@@ -104,6 +104,7 @@ struct local_i915_gem_context_param {
 #define LOCAL_CONTEXT_PARAM_BAN_PERIOD 0x1
 	uint64_t value;
 };
+void gem_context_require_ban_period(int fd);
 void gem_context_require_param(int fd, uint64_t param);
 void gem_context_get_param(int fd, struct local_i915_gem_context_param *p);
 void gem_context_set_param(int fd, struct local_i915_gem_context_param *p);