drm/nouveau/mmu: define user interfaces to mmu memory allocation

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

2 files changed, 89 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvif/Kbuild b/drivers/gpu/drm/nouveau/nvif/Kbuild
index 1f23a08cf701..2e0a90b4dda8 100644
--- a/drivers/gpu/drm/nouveau/nvif/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvif/Kbuild
@@ -2,5 +2,6 @@ nvif-y := nvif/object.o
 nvif-y += nvif/client.o
 nvif-y += nvif/device.o
 nvif-y += nvif/driver.o
+nvif-y += nvif/mem.o
 nvif-y += nvif/mmu.o
 nvif-y += nvif/notify.o
diff --git a/drivers/gpu/drm/nouveau/nvif/mem.c b/drivers/gpu/drm/nouveau/nvif/mem.c
new file mode 100644
index 000000000000..0f9382c60145
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvif/mem.c
@@ -0,0 +1,88 @@
+/*
+ * 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/mem.h>
+#include <nvif/client.h>
+
+#include <nvif/if000a.h>
+
+void
+nvif_mem_fini(struct nvif_mem *mem)
+{
+	nvif_object_fini(&mem->object);
+}
+
+int
+nvif_mem_init_type(struct nvif_mmu *mmu, s32 oclass, int type, u8 page,
+		   u64 size, void *argv, u32 argc, struct nvif_mem *mem)
+{
+	struct nvif_mem_v0 *args;
+	u8 stack[128];
+	int ret;
+
+	mem->object.client = NULL;
+	if (type < 0)
+		return -EINVAL;
+
+	if (sizeof(*args) + argc > sizeof(stack)) {
+		if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
+			return -ENOMEM;
+	} else {
+		args = (void *)stack;
+	}
+	args->version = 0;
+	args->type = type;
+	args->page = page;
+	args->size = size;
+	memcpy(args->data, argv, argc);
+
+	ret = nvif_object_init(&mmu->object, 0, oclass, args,
+			       sizeof(*args) + argc, &mem->object);
+	if (ret == 0) {
+		mem->type = mmu->type[type].type;
+		mem->page = args->page;
+		mem->addr = args->addr;
+		mem->size = args->size;
+	}
+
+	if (args != (void *)stack)
+		kfree(args);
+	return ret;
+
+}
+
+int
+nvif_mem_init(struct nvif_mmu *mmu, s32 oclass, u8 type, u8 page,
+	      u64 size, void *argv, u32 argc, struct nvif_mem *mem)
+{
+	int ret = -EINVAL, i;
+
+	mem->object.client = NULL;
+
+	for (i = 0; ret && i < mmu->type_nr; i++) {
+		if ((mmu->type[i].type & type) == type) {
+			ret = nvif_mem_init_type(mmu, oclass, i, page, size,
+						 argv, argc, mem);
+		}
+	}
+
+	return ret;
+}