[Intel-gfx] [PATCH v2 07/11] drm/i915: move request slabs to direct module init/exit

[Daniel Vetter <daniel.vetter@ffwll.ch>]

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_requests|execute_cbs to just a
slab_requests|execute_cbs.

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>
---
 drivers/gpu/drm/i915/i915_globals.c |  2 --
 drivers/gpu/drm/i915/i915_pci.c     |  2 ++
 drivers/gpu/drm/i915/i915_request.c | 47 ++++++++++++-----------------
 drivers/gpu/drm/i915/i915_request.h |  3 ++
 4 files changed, 24 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_globals.c b/drivers/gpu/drm/i915/i915_globals.c
index 40a592fbc3e0..8fffa8d93bc5 100644
--- a/drivers/gpu/drm/i915/i915_globals.c
+++ b/drivers/gpu/drm/i915/i915_globals.c
@@ -8,7 +8,6 @@
 #include <linux/workqueue.h>
 
 #include "i915_globals.h"
-#include "i915_request.h"
 #include "i915_scheduler.h"
 #include "i915_vma.h"
 
@@ -30,7 +29,6 @@ static void __i915_globals_cleanup(void)
 }
 
 static __initconst int (* const initfn[])(void) = {
-	i915_global_request_init,
 	i915_global_scheduler_init,
 	i915_global_vma_init,
 };
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 7a13570c04a5..3f1716a3d74f 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -35,6 +35,7 @@
 #include "i915_drv.h"
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_object.h"
+#include "i915_request.h"
 #include "i915_perf.h"
 #include "i915_globals.h"
 #include "i915_selftest.h"
@@ -1303,6 +1304,7 @@ static const struct {
 	{ i915_context_module_init, i915_context_module_exit },
 	{ i915_gem_context_module_init, i915_gem_context_module_exit },
 	{ i915_objects_module_init, i915_objects_module_exit },
+	{ i915_request_module_init, i915_request_module_exit },
 	{ i915_globals_init, i915_globals_exit },
 	{ i915_mock_selftests, NULL },
 	{ i915_pmu_init, i915_pmu_exit },
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 6594cb2f8ebd..3dd759be3c28 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -42,7 +42,6 @@
 
 #include "i915_active.h"
 #include "i915_drv.h"
-#include "i915_globals.h"
 #include "i915_trace.h"
 #include "intel_pm.h"
 
@@ -52,11 +51,8 @@ struct execute_cb {
 	struct i915_request *signal;
 };
 
-static struct i915_global_request {
-	struct i915_global base;
-	struct kmem_cache *slab_requests;
-	struct kmem_cache *slab_execute_cbs;
-} global;
+static struct kmem_cache *slab_requests;
+static struct kmem_cache *slab_execute_cbs;
 
 static const char *i915_fence_get_driver_name(struct dma_fence *fence)
 {
@@ -107,7 +103,7 @@ static signed long i915_fence_wait(struct dma_fence *fence,
 
 struct kmem_cache *i915_request_slab_cache(void)
 {
-	return global.slab_requests;
+	return slab_requests;
 }
 
 static void i915_fence_release(struct dma_fence *fence)
@@ -159,7 +155,7 @@ static void i915_fence_release(struct dma_fence *fence)
 	    !cmpxchg(&rq->engine->request_pool, NULL, rq))
 		return;
 
-	kmem_cache_free(global.slab_requests, rq);
+	kmem_cache_free(slab_requests, rq);
 }
 
 const struct dma_fence_ops i915_fence_ops = {
@@ -176,7 +172,7 @@ static void irq_execute_cb(struct irq_work *wrk)
 	struct execute_cb *cb = container_of(wrk, typeof(*cb), work);
 
 	i915_sw_fence_complete(cb->fence);
-	kmem_cache_free(global.slab_execute_cbs, cb);
+	kmem_cache_free(slab_execute_cbs, cb);
 }
 
 static __always_inline void
@@ -514,7 +510,7 @@ __await_execution(struct i915_request *rq,
 	if (i915_request_is_active(signal))
 		return 0;
 
-	cb = kmem_cache_alloc(global.slab_execute_cbs, gfp);
+	cb = kmem_cache_alloc(slab_execute_cbs, gfp);
 	if (!cb)
 		return -ENOMEM;
 
@@ -868,7 +864,7 @@ request_alloc_slow(struct intel_timeline *tl,
 	rq = list_first_entry(&tl->requests, typeof(*rq), link);
 	i915_request_retire(rq);
 
-	rq = kmem_cache_alloc(global.slab_requests,
+	rq = kmem_cache_alloc(slab_requests,
 			      gfp | __GFP_RETRY_MAYFAIL | __GFP_NOWARN);
 	if (rq)
 		return rq;
@@ -881,7 +877,7 @@ request_alloc_slow(struct intel_timeline *tl,
 	retire_requests(tl);
 
 out:
-	return kmem_cache_alloc(global.slab_requests, gfp);
+	return kmem_cache_alloc(slab_requests, gfp);
 }
 
 static void __i915_request_ctor(void *arg)
@@ -942,7 +938,7 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp)
 	 *
 	 * Do not use kmem_cache_zalloc() here!
 	 */
-	rq = kmem_cache_alloc(global.slab_requests,
+	rq = kmem_cache_alloc(slab_requests,
 			      gfp | __GFP_RETRY_MAYFAIL | __GFP_NOWARN);
 	if (unlikely(!rq)) {
 		rq = request_alloc_slow(tl, &ce->engine->request_pool, gfp);
@@ -1029,7 +1025,7 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp)
 	GEM_BUG_ON(!list_empty(&rq->sched.waiters_list));
 
 err_free:
-	kmem_cache_free(global.slab_requests, rq);
+	kmem_cache_free(slab_requests, rq);
 err_unreserve:
 	intel_context_unpin(ce);
 	return ERR_PTR(ret);
@@ -2084,19 +2080,15 @@ void i915_request_show(struct drm_printer *m,
 #include "selftests/i915_request.c"
 #endif
 
-static void i915_global_request_exit(void)
+void i915_request_module_exit(void)
 {
-	kmem_cache_destroy(global.slab_execute_cbs);
-	kmem_cache_destroy(global.slab_requests);
+	kmem_cache_destroy(slab_execute_cbs);
+	kmem_cache_destroy(slab_requests);
 }
 
-static struct i915_global_request global = { {
-	.exit = i915_global_request_exit,
-} };
-
-int __init i915_global_request_init(void)
+int __init i915_request_module_init(void)
 {
-	global.slab_requests =
+	slab_requests =
 		kmem_cache_create("i915_request",
 				  sizeof(struct i915_request),
 				  __alignof__(struct i915_request),
@@ -2104,20 +2096,19 @@ int __init i915_global_request_init(void)
 				  SLAB_RECLAIM_ACCOUNT |
 				  SLAB_TYPESAFE_BY_RCU,
 				  __i915_request_ctor);
-	if (!global.slab_requests)
+	if (!slab_requests)
 		return -ENOMEM;
 
-	global.slab_execute_cbs = KMEM_CACHE(execute_cb,
+	slab_execute_cbs = KMEM_CACHE(execute_cb,
 					     SLAB_HWCACHE_ALIGN |
 					     SLAB_RECLAIM_ACCOUNT |
 					     SLAB_TYPESAFE_BY_RCU);
-	if (!global.slab_execute_cbs)
+	if (!slab_execute_cbs)
 		goto err_requests;
 
-	i915_global_register(&global.base);
 	return 0;
 
 err_requests:
-	kmem_cache_destroy(global.slab_requests);
+	kmem_cache_destroy(slab_requests);
 	return -ENOMEM;
 }
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index 717e5b292046..a79480f07f04 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -647,4 +647,7 @@ bool
 i915_request_active_engine(struct i915_request *rq,
 			   struct intel_engine_cs **active);
 
+void i915_request_module_exit(void);
+int i915_request_module_init(void);
+
 #endif /* I915_REQUEST_H */
-- 
2.32.0

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