drm/i915: move vma slab to direct module init/exit

With the global kmem_cache shrink infrastructure gone there's nothing
special and we can convert them over.

I'm doing this split up into each patch because there's quite a bit of
noise with removing the static global.slab_vmas to just a
slab_vmas.

We have to keep i915_drv.h include in i915_globals otherwise there's
nothing anymore that pulls in GEM_BUG_ON.

v2: Make slab static (Jason, 0day)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727121037.2041102-9-daniel.vetter@ffwll.ch

drivers/gpu/drm/i915/i915_globals.c

@@ -8,7 +8,7 @@
 #include <linux/workqueue.h>
 
 #include "i915_globals.h"
-#include "i915_vma.h"
+#include "i915_drv.h"
 
 static LIST_HEAD(globals);
 
@@ -28,7 +28,6 @@ static void __i915_globals_cleanup(void)
 }
 
 static __initconst int (* const initfn[])(void) = {
-	i915_global_vma_init,
 };
 
 int __init i915_globals_init(void)

drivers/gpu/drm/i915/i915_globals.h

@@ -22,7 +22,4 @@ void i915_global_register(struct i915_global *global);
 int i915_globals_init(void);
 void i915_globals_exit(void);
 
-/* constructors */
-int i915_global_vma_init(void);
-
 #endif /* _I915_GLOBALS_H_ */

drivers/gpu/drm/i915/i915_pci.c

@@ -40,6 +40,7 @@
 #include "i915_globals.h"
 #include "i915_selftest.h"
 #include "i915_scheduler.h"
+#include "i915_vma.h"
 
 #define PLATFORM(x) .platform = (x)
 #define GEN(x) \
@@ -1272,6 +1273,7 @@ static const struct {
 	{ i915_objects_module_init, i915_objects_module_exit },
 	{ i915_request_module_init, i915_request_module_exit },
 	{ i915_scheduler_module_init, i915_scheduler_module_exit },
+	{ i915_vma_module_init, i915_vma_module_exit },
 	{ i915_globals_init, i915_globals_exit },
 	{ i915_mock_selftests, NULL },
 	{ i915_pmu_init, i915_pmu_exit },

drivers/gpu/drm/i915/i915_vma.c

@@ -34,24 +34,20 @@
 #include "gt/intel_gt_requests.h"
 
 #include "i915_drv.h"
-#include "i915_globals.h"
 #include "i915_sw_fence_work.h"
 #include "i915_trace.h"
 #include "i915_vma.h"
 
-static struct i915_global_vma {
-	struct i915_global base;
-	struct kmem_cache *slab_vmas;
-} global;
+static struct kmem_cache *slab_vmas;
 
 struct i915_vma *i915_vma_alloc(void)
 {
-	return kmem_cache_zalloc(global.slab_vmas, GFP_KERNEL);
+	return kmem_cache_zalloc(slab_vmas, GFP_KERNEL);
 }
 
 void i915_vma_free(struct i915_vma *vma)
 {
-	return kmem_cache_free(global.slab_vmas, vma);
+	return kmem_cache_free(slab_vmas, vma);
 }
 
 #if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM)
@@ -1414,21 +1410,16 @@ void i915_vma_make_purgeable(struct i915_vma *vma)
 #include "selftests/i915_vma.c"
 #endif
 
-static void i915_global_vma_exit(void)
+void i915_vma_module_exit(void)
 {
-	kmem_cache_destroy(global.slab_vmas);
+	kmem_cache_destroy(slab_vmas);
 }
 
-static struct i915_global_vma global = { {
-	.exit = i915_global_vma_exit,
-} };
-
-int __init i915_global_vma_init(void)
+int __init i915_vma_module_init(void)
 {
-	global.slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
-	if (!global.slab_vmas)
+	slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
+	if (!slab_vmas)
 		return -ENOMEM;
 
-	i915_global_register(&global.base);
 	return 0;
 }

drivers/gpu/drm/i915/i915_vma.h

@@ -426,4 +426,7 @@ static inline int i915_vma_sync(struct i915_vma *vma)
 	return i915_active_wait(&vma->active);
 }
 
+void i915_vma_module_exit(void);
+int i915_vma_module_init(void);
+
 #endif