gpu: drm: img: Replace system work flush with img dedicated workqueue

To remove deprecated flush_scheduled_work() after the commit
20bdedafd2f6 ("workqueue: Warn attempt to flush system-wide workqueues."),
add img dedicated unordered wq and queue/flush the wq instead of
system work.

Change-Id: I316b2858abf15e11d9ed40550a41f9494d421c87
Ref: 848a4e5c096d ("drm/i915: add a dedicated workqueue inside drm_i915_private")
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

4 files changed, 35 insertions, 2 deletions

diff --git a/drivers/gpu/drm/img-rogue/osfunc.c b/drivers/gpu/drm/img-rogue/osfunc.c
index a319d60898e8..dffad1173421 100644
--- a/drivers/gpu/drm/img-rogue/osfunc.c
+++ b/drivers/gpu/drm/img-rogue/osfunc.c
@@ -558,6 +558,7 @@ IMG_UINT32 OSStringUINT32ToStr(IMG_CHAR *pszBuf, size_t uSize,
 
 #if defined(SUPPORT_NATIVE_FENCE_SYNC) || defined(SUPPORT_BUFFER_SYNC)
 static struct workqueue_struct *gpFenceStatusWq;
+static struct workqueue_struct *gpFenceUnorderedWq;
 
 static PVRSRV_ERROR _NativeSyncInit(void)
 {
@@ -569,11 +570,24 @@ static PVRSRV_ERROR _NativeSyncInit(void)
 		return PVRSRV_ERROR_INIT_FAILURE;
 	}
 
+	gpFenceUnorderedWq = create_workqueue("pvr_fence_unordered");
+	if (!gpFenceUnorderedWq)
+	{
+		PVR_DPF((PVR_DBG_ERROR, "%s: Failed to create fence unordered workqueue",
+				 __func__));
+		destroy_workqueue(gpFenceStatusWq);
+		gpFenceStatusWq = NULL;
+		return PVRSRV_ERROR_INIT_FAILURE;
+	}
+
 	return PVRSRV_OK;
 }
 
 static void _NativeSyncDeinit(void)
 {
+    if (gpFenceUnorderedWq) {
+	destroy_workqueue(gpFenceUnorderedWq);
+    }
     if (gpFenceStatusWq) {
         destroy_workqueue(gpFenceStatusWq);
     }
@@ -591,6 +605,19 @@ struct workqueue_struct *NativeSyncGetFenceStatusWq(void)
 
 	return gpFenceStatusWq;
 }
+
+struct workqueue_struct *NativeSyncGetFenceUnorderedWq(void)
+{
+	if (!gpFenceUnorderedWq)
+	{
+#if defined(DEBUG)
+		PVR_ASSERT(gpFenceUnorderedWq);
+#endif
+		return NULL;
+	}
+
+	return gpFenceUnorderedWq;
+}
 #endif
 
 PVRSRV_ERROR OSInitEnvData(void)
diff --git a/drivers/gpu/drm/img-rogue/pvr_fence.c b/drivers/gpu/drm/img-rogue/pvr_fence.c
index e94522a647ae..e9cd85bfe902 100644
--- a/drivers/gpu/drm/img-rogue/pvr_fence.c
+++ b/drivers/gpu/drm/img-rogue/pvr_fence.c
@@ -501,12 +501,14 @@ static void pvr_fence_context_destroy_kref(struct kref *kref)
 {
 	struct pvr_fence_context *fctx =
 		container_of(kref, struct pvr_fence_context, kref);
+	struct workqueue_struct *unordered_wq = NativeSyncGetFenceUnorderedWq();
 
 	PVR_FENCE_CTX_TRACE(fctx, "destroyed fence context (%s)\n", fctx->name);
 
 	trace_pvr_fence_context_destroy_kref(fctx);
 
-	schedule_work(&fctx->destroy_work);
+	if (unordered_wq)
+		queue_work(unordered_wq, &fctx->destroy_work);
 }
 
 /**
diff --git a/drivers/gpu/drm/img-rogue/pvr_fence.h b/drivers/gpu/drm/img-rogue/pvr_fence.h
index 21870ba9113e..078039f33f18 100644
--- a/drivers/gpu/drm/img-rogue/pvr_fence.h
+++ b/drivers/gpu/drm/img-rogue/pvr_fence.h
@@ -190,11 +190,14 @@ u32 pvr_fence_dump_info_on_stalled_ufos(struct pvr_fence_context *fctx,
 
 static inline void pvr_fence_cleanup(void)
 {
+	struct workqueue_struct *unordered_wq = NativeSyncGetFenceUnorderedWq();
+
 	/*
 	 * Ensure all PVR fence contexts have been destroyed, by flushing
 	 * the global workqueue.
 	 */
-	flush_scheduled_work();
+	if (unordered_wq)
+		flush_workqueue(unordered_wq);
 }
 
 #if defined(PVR_FENCE_DEBUG)
diff --git a/drivers/gpu/drm/img-rogue/services_kernel_client.h b/drivers/gpu/drm/img-rogue/services_kernel_client.h
index aaca47f1e6d6..96134e7b9e4a 100644
--- a/drivers/gpu/drm/img-rogue/services_kernel_client.h
+++ b/drivers/gpu/drm/img-rogue/services_kernel_client.h
@@ -286,6 +286,7 @@ struct _PVRSRV_DEVICE_NODE_ *SyncCheckpointGetAssociatedDevice(PSYNC_CHECKPOINT_
 @Return         struct workqueue_struct ptr on success, NULL otherwise.
 */ /**************************************************************************/
 struct workqueue_struct *NativeSyncGetFenceStatusWq(void);
+struct workqueue_struct *NativeSyncGetFenceUnorderedWq(void);
 #endif
 
 #endif /* __SERVICES_KERNEL_CLIENT__ */