drm/nouveau/mmu: define user interfaces to mmu

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

2 files changed, 118 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvif/Kbuild b/drivers/gpu/drm/nouveau/nvif/Kbuild
index 067b5e9f5ec1..1f23a08cf701 100644
--- a/drivers/gpu/drm/nouveau/nvif/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvif/Kbuild
@@ -2,4 +2,5 @@ nvif-y := nvif/object.o
 nvif-y += nvif/client.o
 nvif-y += nvif/device.o
 nvif-y += nvif/driver.o
+nvif-y += nvif/mmu.o
 nvif-y += nvif/notify.o
diff --git a/drivers/gpu/drm/nouveau/nvif/mmu.c b/drivers/gpu/drm/nouveau/nvif/mmu.c
new file mode 100644
index 000000000000..15d0dcbf7ab4
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvif/mmu.c
@@ -0,0 +1,117 @@
+/*
+ * 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 <nvif/mmu.h>
+
+#include <nvif/class.h>
+#include <nvif/if0008.h>
+
+void
+nvif_mmu_fini(struct nvif_mmu *mmu)
+{
+	kfree(mmu->kind);
+	kfree(mmu->type);
+	kfree(mmu->heap);
+	nvif_object_fini(&mmu->object);
+}
+
+int
+nvif_mmu_init(struct nvif_object *parent, s32 oclass, struct nvif_mmu *mmu)
+{
+	struct nvif_mmu_v0 args;
+	int ret, i;
+
+	args.version = 0;
+	mmu->heap = NULL;
+	mmu->type = NULL;
+	mmu->kind = NULL;
+
+	ret = nvif_object_init(parent, 0, oclass, &args, sizeof(args),
+			       &mmu->object);
+	if (ret)
+		goto done;
+
+	mmu->dmabits = args.dmabits;
+	mmu->heap_nr = args.heap_nr;
+	mmu->type_nr = args.type_nr;
+	mmu->kind_nr = args.kind_nr;
+
+	mmu->heap = kmalloc(sizeof(*mmu->heap) * mmu->heap_nr, GFP_KERNEL);
+	mmu->type = kmalloc(sizeof(*mmu->type) * mmu->type_nr, GFP_KERNEL);
+	if (ret = -ENOMEM, !mmu->heap || !mmu->type)
+		goto done;
+
+	mmu->kind = kmalloc(sizeof(*mmu->kind) * mmu->kind_nr, GFP_KERNEL);
+	if (!mmu->kind && mmu->kind_nr)
+		goto done;
+
+	for (i = 0; i < mmu->heap_nr; i++) {
+		struct nvif_mmu_heap_v0 args = { .index = i };
+
+		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
+				       &args, sizeof(args));
+		if (ret)
+			goto done;
+
+		mmu->heap[i].size = args.size;
+	}
+
+	for (i = 0; i < mmu->type_nr; i++) {
+		struct nvif_mmu_type_v0 args = { .index = i };
+
+		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
+				       &args, sizeof(args));
+		if (ret)
+			goto done;
+
+		mmu->type[i].type = 0;
+		if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
+		if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
+		if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
+		if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
+		if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
+		if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
+		if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
+		if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
+		mmu->type[i].heap = args.heap;
+	}
+
+	if (mmu->kind_nr) {
+		struct nvif_mmu_kind_v0 *kind;
+		u32 argc = sizeof(*kind) + sizeof(*kind->data) * mmu->kind_nr;
+
+		if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
+			goto done;
+		kind->version = 0;
+		kind->count = mmu->kind_nr;
+
+		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
+				       kind, argc);
+		if (ret == 0)
+			memcpy(mmu->kind, kind->data, kind->count);
+		kfree(kind);
+	}
+
+done:
+	if (ret)
+		nvif_mmu_fini(mmu);
+	return ret;
+}