drm/ttm/vmwgfx: move ttm_bo_wait into VMWGFX

Not used anymore by other drivers or TTM itself.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NZack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125102137.1801-9-christian.koenig@amd.com

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1087,47 +1087,35 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
 EXPORT_SYMBOL(ttm_bo_unmap_virtual);
 
 /**
- * ttm_bo_wait - wait for buffer idle.
+ * ttm_bo_wait_ctx - wait for buffer idle.
  *
  * @bo:  The buffer object.
- * @interruptible:  Use interruptible wait.
- * @no_wait:  Return immediately if buffer is busy.
+ * @ctx: defines how to wait
  *
- * This function must be called with the bo::mutex held, and makes
- * sure any previous rendering to the buffer is completed.
- * Note: It might be necessary to block validations before the
- * wait by reserving the buffer.
- * Returns -EBUSY if no_wait is true and the buffer is busy.
- * Returns -ERESTARTSYS if interrupted by a signal.
+ * Waits for the buffer to be idle. Used timeout depends on the context.
+ * Returns -EBUSY if wait timed outt, -ERESTARTSYS if interrupted by a signal or
+ * zero on success.
  */
-int ttm_bo_wait(struct ttm_buffer_object *bo,
-		bool interruptible, bool no_wait)
+int ttm_bo_wait_ctx(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx)
 {
-	long timeout = 15 * HZ;
+	long ret;
 
-	if (no_wait) {
-		if (dma_resv_test_signaled(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP))
+	if (ctx->no_wait_gpu) {
+		if (dma_resv_test_signaled(bo->base.resv,
+					   DMA_RESV_USAGE_BOOKKEEP))
 			return 0;
 		else
 			return -EBUSY;
 	}
 
-	timeout = dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP,
-					interruptible, timeout);
-	if (timeout < 0)
-		return timeout;
-
-	if (timeout == 0)
+	ret = dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP,
+				    ctx->interruptible, 15 * HZ);
+	if (unlikely(ret < 0))
+		return ret;
+	if (unlikely(ret == 0))
 		return -EBUSY;
-
 	return 0;
 }
-EXPORT_SYMBOL(ttm_bo_wait);
-
-int ttm_bo_wait_ctx(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx)
-{
-	return ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
-}
 EXPORT_SYMBOL(ttm_bo_wait_ctx);
 
 int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
@@ -1135,7 +1123,7 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
 {
 	struct ttm_place place;
 	bool locked;
-	int ret;
+	long ret;
 
 	/*
 	 * While the bo may already reside in SYSTEM placement, set

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -548,9 +548,13 @@ EXPORT_SYMBOL(ttm_bo_vunmap);
 static int ttm_bo_wait_free_node(struct ttm_buffer_object *bo,
 				 bool dst_use_tt)
 {
-	int ret;
-	ret = ttm_bo_wait(bo, false, false);
-	if (ret)
+	long ret;
+
+	ret = dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP,
+				    false, 15 * HZ);
+	if (ret == 0)
+		return -EBUSY;
+	if (ret < 0)
 		return ret;
 
 	if (!dst_use_tt)
@@ -711,8 +715,7 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo)
 		return ret;
 
 	/* If already idle, no need for ghost object dance. */
-	ret = ttm_bo_wait(bo, false, true);
-	if (ret != -EBUSY) {
+	if (dma_resv_test_signaled(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP)) {
 		if (!bo->ttm) {
 			/* See comment below about clearing. */
 			ret = ttm_tt_create(bo, true);
@@ -749,8 +752,10 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo)
 
 	ret = dma_resv_copy_fences(&ghost->base._resv, bo->base.resv);
 	/* Last resort, wait for the BO to be idle when we are OOM */
-	if (ret)
-		ttm_bo_wait(bo, false, false);
+	if (ret) {
+		dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP,
+				      false, MAX_SCHEDULE_TIMEOUT);
+	}
 
 	dma_resv_unlock(&ghost->base._resv);
 	ttm_bo_put(ghost);

drivers/gpu/drm/vmwgfx/ttm_object.h

@@ -42,6 +42,8 @@
 #include <linux/list.h>
 #include <linux/rcupdate.h>
 
+#include <drm/ttm/ttm_bo.h>
+
 /**
  * enum ttm_object_type
  *
@@ -321,4 +323,13 @@ static inline void ttm_base_object_noref_release(void)
 	__acquire(RCU);
 	rcu_read_unlock();
 }
+
+static inline int ttm_bo_wait(struct ttm_buffer_object *bo, bool intr,
+			      bool no_wait)
+{
+	struct ttm_operation_ctx ctx = { intr, no_wait };
+
+	return ttm_bo_wait_ctx(bo, &ctx);
+}
+
 #endif

include/drm/ttm/ttm_bo.h

@@ -347,7 +347,6 @@ static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
 	return map->virtual;
 }
 
-int ttm_bo_wait(struct ttm_buffer_object *bo, bool interruptible, bool no_wait);
 int ttm_bo_wait_ctx(struct ttm_buffer_object *bo,
 		    struct ttm_operation_ctx *ctx);
 int ttm_bo_validate(struct ttm_buffer_object *bo,