drm/nouveau/mmu/nv44: implement vmm on top of new base

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv44.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv44.c
new file mode 100644
index 000000000000..2b5704269ac9
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv44.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2017 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "vmm.h"
+
+static const struct nvkm_vmm_desc_func
+nv44_vmm_desc_pgt = {
+};
+
+static const struct nvkm_vmm_desc
+nv44_vmm_desc_12[] = {
+	{ PGT, 17, 4, 0x80000, &nv44_vmm_desc_pgt },
+	{}
+};
+
+static const struct nvkm_vmm_func
+nv44_vmm = {
+	.page = {
+		{ 12, &nv44_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
+		{}
+	}
+};
+
+int
+nv44_vmm_new(struct nvkm_mmu *mmu, u64 addr, u64 size, void *argv, u32 argc,
+	     struct lock_class_key *key, const char *name,
+	     struct nvkm_vmm **pvmm)
+{
+	struct nvkm_subdev *subdev = &mmu->subdev;
+	struct nvkm_vmm *vmm;
+	int ret;
+
+	ret = nv04_vmm_new_(&nv44_vmm, mmu, 0, addr, size,
+			    argv, argc, key, name, &vmm);
+	*pvmm = vmm;
+	if (ret)
+		return ret;
+
+	vmm->nullp = dma_alloc_coherent(subdev->device->dev, 16 * 1024,
+					&vmm->null, GFP_KERNEL);
+	if (!vmm->nullp) {
+		nvkm_warn(subdev, "unable to allocate dummy pages\n");
+		vmm->null = 0;
+	}
+
+	return 0;
+}