gpu: nvgpu: vgpu: add ivm wrappers

Added vgpu_ivm_*() functions to be used by os agnostic code.

Jira EVLR-2364

Change-Id: I4a2baebcff9723950c4fba99d0879a0c61e3e3a2
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1649935
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/common/linux/vgpu/vgpu_ivm.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018, NVIDIA Corporation.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <nvgpu/vgpu/vgpu_ivm.h>
+#include <linux/tegra-ivc.h>
+
+struct tegra_hv_ivm_cookie *vgpu_ivm_mempool_reserve(unsigned int id)
+{
+	return tegra_hv_mempool_reserve(id);
+}
+
+int vgpu_ivm_mempool_unreserve(struct tegra_hv_ivm_cookie *cookie)
+{
+	return tegra_hv_mempool_unreserve(cookie);
+}
+
+u64 vgpu_ivm_get_ipa(struct tegra_hv_ivm_cookie *cookie)
+{
+	return cookie->ipa;
+}
+
+u64 vgpu_ivm_get_size(struct tegra_hv_ivm_cookie *cookie)
+{
+	return cookie->size;
+}