gpu: nvgpu: add support for L3 cache allocation of buffers

Add gv11b implementation of gpu_phys_addr() that checks the t19x
GMMU attributes struct to determine if L3 allocation should be
enabled. If L3 alloc is enabled then a special physical address
bit is set.

Add flag NVGPU_AS_MAP_BUFFER_FLAGS_L3_ALLOC to struct
nvgpu_as_map_buffer_ex_args so that User space can add a hint to
allocate buffer in L3 cache

Jira GPUT19X-10
Bug 200279508

Change-Id: I1bb9876a670b252980922aa50e3e69b802be137f
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master/r/1512602
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/gmmu_t19x.c b/drivers/gpu/nvgpu/common/mm/gmmu_t19x.c
new file mode 100644
index 00000000..05abec1b
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/mm/gmmu_t19x.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2017, 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 <uapi/linux/nvgpu.h>
+
+#include <nvgpu/gmmu.h>
+
+void nvgpu_gmmu_add_t19x_attrs(struct nvgpu_gmmu_attrs *attrs, u32 flags)
+{
+        attrs->t19x_attrs.l3_alloc = (bool)(flags &
+                                            NVGPU_AS_MAP_BUFFER_FLAGS_L3_ALLOC);
+}