intel/common: provide common ioctl routine

i965 links against libdrm for drmIoctl, but anv and iris both
re-implement this routine to avoid the dependency.

intel/dev also needs an ioctl wrapper, so lets share the same
implementation everywhere.

Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Lionel Landwerlin <[email protected]>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/intel/common/gen_gem.h b/src/intel/common/gen_gem.h
index 8df2c249e48..c4dda6de657 100644
--- a/src/intel/common/gen_gem.h
+++ b/src/intel/common/gen_gem.h
@@ -24,7 +24,9 @@
 #ifndef GEN_GEM_H
 #define GEN_GEM_H
 
+#include <errno.h>
 #include <stdint.h>
+#include <sys/ioctl.h>
 
 static inline uint64_t
 gen_canonical_address(uint64_t v)
@@ -54,4 +56,18 @@ gen_48b_address(uint64_t v)
    return (uint64_t)(v << shift) >> shift;
 }
 
+/**
+ * Call ioctl, restarting if it is interupted
+ */
+static inline int
+gen_ioctl(int fd, unsigned long request, void *arg)
+{
+    int ret;
+
+    do {
+        ret = ioctl(fd, request, arg);
+    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+    return ret;
+}
+
 #endif /* GEN_GEM_H */