Add a linux compatible request_firmware() wrapper around loadfirmware(9).

ok deraadt@ kettenis@

diff --git a/sys/dev/pci/drm/drm_linux.h b/sys/dev/pci/drm/drm_linux.h
index 8b5a4c7..c7a8305 100644 (file)
--- a/sys/dev/pci/drm/drm_linux.h
+++ b/sys/dev/pci/drm/drm_linux.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: drm_linux.h,v 1.65 2017/11/29 03:59:34 dlg Exp $      */
+/*     $OpenBSD: drm_linux.h,v 1.66 2018/01/13 14:15:07 jsg Exp $      */
 /*
  * Copyright (c) 2013, 2014, 2015 Mark Kettenis
  * Copyright (c) 2017 Martin Pieuchot
@@ -2161,6 +2161,7 @@ size_t sg_copy_from_buffer(struct scatterlist *, unsigned int,
     const void *, size_t);
 
 struct firmware {
+       size_t size;
        const u8 *data;
 };
 
@@ -2168,7 +2169,14 @@ static inline int
 request_firmware(const struct firmware **fw, const char *name,
     struct device *device)
 {
-       return -EINVAL;
+       int r;
+       struct firmware *f = malloc(sizeof(struct firmware), M_DRM, M_WAITOK);
+       *fw = f;
+       r = loadfirmware(name, __DECONST(u_char **, &f->data), &f->size);
+       if (r != 0)
+               return -r;
+       else
+               return 0;
 }
 
 #define request_firmware_nowait(a, b, c, d, e, f, g) -EINVAL
@@ -2176,6 +2184,8 @@ request_firmware(const struct firmware **fw, const char *name,
 static inline void
 release_firmware(const struct firmware *fw)
 {
+       free(__DECONST(u_char *, fw->data), M_DRM, fw->size);
+       free(__DECONST(struct firmware *, fw), M_DRM, sizeof(*fw));
 }
 
 void *memchr_inv(const void *, int, size_t);