Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 193 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_gem_vma.c
new file mode 100644
index 000000000..c471aebcd
--- /dev/null
+++ b/drivers/gpu/drm/msm/msm_gem_vma.c
@@ -0,0 +1,193 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2016 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include "msm_drv.h"
+#include "msm_fence.h"
+#include "msm_gem.h"
+#include "msm_mmu.h"
+
+static void
+msm_gem_address_space_destroy(struct kref *kref)
+{
+	struct msm_gem_address_space *aspace = container_of(kref,
+			struct msm_gem_address_space, kref);
+
+	drm_mm_takedown(&aspace->mm);
+	if (aspace->mmu)
+		aspace->mmu->funcs->destroy(aspace->mmu);
+	put_pid(aspace->pid);
+	kfree(aspace);
+}
+
+
+void msm_gem_address_space_put(struct msm_gem_address_space *aspace)
+{
+	if (aspace)
+		kref_put(&aspace->kref, msm_gem_address_space_destroy);
+}
+
+struct msm_gem_address_space *
+msm_gem_address_space_get(struct msm_gem_address_space *aspace)
+{
+	if (!IS_ERR_OR_NULL(aspace))
+		kref_get(&aspace->kref);
+
+	return aspace;
+}
+
+bool msm_gem_vma_inuse(struct msm_gem_vma *vma)
+{
+	if (vma->inuse > 0)
+		return true;
+
+	while (vma->fence_mask) {
+		unsigned idx = ffs(vma->fence_mask) - 1;
+
+		if (!msm_fence_completed(vma->fctx[idx], vma->fence[idx]))
+			return true;
+
+		vma->fence_mask &= ~BIT(idx);
+	}
+
+	return false;
+}
+
+/* Actually unmap memory for the vma */
+void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
+		struct msm_gem_vma *vma)
+{
+	unsigned size = vma->node.size;
+
+	/* Print a message if we try to purge a vma in use */
+	GEM_WARN_ON(msm_gem_vma_inuse(vma));
+
+	/* Don't do anything if the memory isn't mapped */
+	if (!vma->mapped)
+		return;
+
+	if (aspace->mmu)
+		aspace->mmu->funcs->unmap(aspace->mmu, vma->iova, size);
+
+	vma->mapped = false;
+}
+
+/* Remove reference counts for the mapping */
+void msm_gem_unpin_vma(struct msm_gem_vma *vma)
+{
+	if (GEM_WARN_ON(!vma->inuse))
+		return;
+	if (!GEM_WARN_ON(!vma->iova))
+		vma->inuse--;
+}
+
+/* Replace pin reference with fence: */
+void msm_gem_unpin_vma_fenced(struct msm_gem_vma *vma, struct msm_fence_context *fctx)
+{
+	vma->fctx[fctx->index] = fctx;
+	vma->fence[fctx->index] = fctx->last_fence;
+	vma->fence_mask |= BIT(fctx->index);
+	msm_gem_unpin_vma(vma);
+}
+
+/* Map and pin vma: */
+int
+msm_gem_map_vma(struct msm_gem_address_space *aspace,
+		struct msm_gem_vma *vma, int prot,
+		struct sg_table *sgt, int size)
+{
+	int ret = 0;
+
+	if (GEM_WARN_ON(!vma->iova))
+		return -EINVAL;
+
+	/* Increase the usage counter */
+	vma->inuse++;
+
+	if (vma->mapped)
+		return 0;
+
+	vma->mapped = true;
+
+	if (aspace && aspace->mmu)
+		ret = aspace->mmu->funcs->map(aspace->mmu, vma->iova, sgt,
+				size, prot);
+
+	if (ret) {
+		vma->mapped = false;
+		vma->inuse--;
+	}
+
+	return ret;
+}
+
+/* Close an iova.  Warn if it is still in use */
+void msm_gem_close_vma(struct msm_gem_address_space *aspace,
+		struct msm_gem_vma *vma)
+{
+	GEM_WARN_ON(msm_gem_vma_inuse(vma) || vma->mapped);
+
+	spin_lock(&aspace->lock);
+	if (vma->iova)
+		drm_mm_remove_node(&vma->node);
+	spin_unlock(&aspace->lock);
+
+	vma->iova = 0;
+
+	msm_gem_address_space_put(aspace);
+}
+
+/* Initialize a new vma and allocate an iova for it */
+int msm_gem_init_vma(struct msm_gem_address_space *aspace,
+		struct msm_gem_vma *vma, int size,
+		u64 range_start, u64 range_end)
+{
+	int ret;
+
+	if (GEM_WARN_ON(vma->iova))
+		return -EBUSY;
+
+	spin_lock(&aspace->lock);
+	ret = drm_mm_insert_node_in_range(&aspace->mm, &vma->node,
+					  size, PAGE_SIZE, 0,
+					  range_start, range_end, 0);
+	spin_unlock(&aspace->lock);
+
+	if (ret)
+		return ret;
+
+	vma->iova = vma->node.start;
+	vma->mapped = false;
+
+	kref_get(&aspace->kref);
+
+	return 0;
+}
+
+struct msm_gem_address_space *
+msm_gem_address_space_create(struct msm_mmu *mmu, const char *name,
+		u64 va_start, u64 size)
+{
+	struct msm_gem_address_space *aspace;
+
+	if (IS_ERR(mmu))
+		return ERR_CAST(mmu);
+
+	aspace = kzalloc(sizeof(*aspace), GFP_KERNEL);
+	if (!aspace)
+		return ERR_PTR(-ENOMEM);
+
+	spin_lock_init(&aspace->lock);
+	aspace->name = name;
+	aspace->mmu = mmu;
+	aspace->va_start = va_start;
+	aspace->va_size  = size;
+
+	drm_mm_init(&aspace->mm, va_start, size);
+
+	kref_init(&aspace->kref);
+
+	return aspace;
+}