From: Ben Skeggs <bske...@redhat.com>
Because NVIF intentionally lacks some of the paths necessary to be
compatible with various mistakes we've made over the years, libdrm
needs to know whether a client has been updated and that it's safe
to make use of the new kernel interfaces.
Clients still using nouveau_device_open()/wrap() will be forced to
make use of ABI16 instead of NVIF.
v2.
- remove lib_version, nothing used it
- leave client-provided pointer unmodified on failure
Signed-off-by: Ben Skeggs <bske...@redhat.com>
---
nouveau/nouveau-symbol-check | 2 ++
nouveau/nouveau.c | 35 +++++++++++++++++++++++++++++++++++
nouveau/nouveau.h | 18 ++++++++++++++++++
3 files changed, 55 insertions(+)
diff --git a/nouveau/nouveau-symbol-check b/nouveau/nouveau-symbol-check
index 38b6ec5..e360b92 100755
--- a/nouveau/nouveau-symbol-check
+++ b/nouveau/nouveau-symbol-check
@@ -30,6 +30,8 @@ nouveau_device_del
nouveau_device_open
nouveau_device_open_existing
nouveau_device_wrap
+nouveau_drm_del
+nouveau_drm_new
nouveau_getparam
nouveau_object_del
nouveau_object_find
diff --git a/nouveau/nouveau.c b/nouveau/nouveau.c
index 0017303..2b16351 100644
--- a/nouveau/nouveau.c
+++ b/nouveau/nouveau.c
@@ -195,6 +195,41 @@ nouveau_object_find(struct nouveau_object *obj, uint32_t
pclass)
return obj;
}
+void
+nouveau_drm_del(struct nouveau_drm **pdrm)
+{
+ free(*pdrm);
+ *pdrm = NULL;
+}
+
+int
+nouveau_drm_new(int fd, struct nouveau_drm **pdrm)
+{
+ struct nouveau_drm *drm;
+ drmVersionPtr ver;
+
+#ifdef DEBUG
+ debug_init(getenv("NOUVEAU_LIBDRM_DEBUG"));
+#endif
+
+ if (!(drm = calloc(1, sizeof(*drm))))
+ return -ENOMEM;
+ drm->fd = fd;
+
+ if (!(ver = drmGetVersion(fd))) {
+ nouveau_drm_del(&drm);
+ return -EINVAL;
+ }
+ *pdrm = drm;
+
+ drm->version = (ver->version_major << 24) |
+ (ver->version_minor << 8) |
+ ver->version_patchlevel;
+ drm->nvif = false;
+ drmFreeVersion(ver);
+ return 0;
+}
+
/* this is the old libdrm's version of nouveau_device_wrap(), the symbol
* is kept here to prevent AIGLX from crashing if the DDX is linked against
* the new libdrm, but the DRI driver against the old
diff --git a/nouveau/nouveau.h b/nouveau/nouveau.h
index 24cda6f..2287eba 100644
--- a/nouveau/nouveau.h
+++ b/nouveau/nouveau.h
@@ -22,6 +22,24 @@ struct nouveau_object {
void *data;
};
+struct nouveau_drm {
+ struct nouveau_object client;
+ int fd;
+ uint32_t version;
+ bool nvif;
+};
+
+static inline struct nouveau_drm *
+nouveau_drm(struct nouveau_object *obj)
+{
+ while (obj && obj->parent)
+ obj = obj->parent;
+ return (struct nouveau_drm *)obj;
+}
+
+int nouveau_drm_new(int fd, struct nouveau_drm **);
+void nouveau_drm_del(struct nouveau_drm **);
+
struct nouveau_fifo {
struct nouveau_object *object;
uint32_t channel;
--
2.6.4
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