1 files changed, 107 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/os_fence_android_sema.c b/drivers/gpu/nvgpu/common/linux/os_fence_android_sema.c
new file mode 100644
index 00000000..b61bd893
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/linux/os_fence_android_sema.c
@@ -0,0 +1,107 @@
+/*
+ * 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/errno.h>
+
+#include <nvgpu/types.h>
+#include <nvgpu/os_fence.h>
+#include <nvgpu/linux/os_fence_android.h>
+#include <nvgpu/semaphore.h>
+
+#include "gk20a/sync_gk20a.h"
+#include "gk20a/channel_sync_gk20a.h"
+#include "gk20a/mm_gk20a.h"
+
+#include "../drivers/staging/android/sync.h"
+
+int nvgpu_os_fence_sema_wait_gen_cmd(struct nvgpu_os_fence *s,
+        struct priv_cmd_entry *wait_cmd,
+        struct channel_gk20a *c,
+        int max_wait_cmds)
+{
+        int err;
+        const int wait_cmd_size = 8;
+        int num_wait_cmds;
+        int i;
+        struct nvgpu_semaphore *sema;
+        struct sync_fence *sync_fence = nvgpu_get_sync_fence(s);
+
+        num_wait_cmds = sync_fence->num_fences;
+        if (num_wait_cmds == 0)
+                return 0;
+
+        if (max_wait_cmds && num_wait_cmds > max_wait_cmds)
+                return -EINVAL;
+
+        err = gk20a_channel_alloc_priv_cmdbuf(c,
+                wait_cmd_size * num_wait_cmds,
+                wait_cmd);
+        if (err) {
+                nvgpu_err(c->g, "not enough priv cmd buffer space");
+                return err;
+        }
+
+        for (i = 0; i < num_wait_cmds; i++) {
+                struct fence *f = sync_fence->cbs[i].sync_pt;
+                struct sync_pt *pt = sync_pt_from_fence(f);
+
+                sema = gk20a_sync_pt_sema(pt);
+                gk20a_channel_gen_sema_wait_cmd(c, sema, wait_cmd,
+                        wait_cmd_size, i);
+        }
+
+        return 0;
+}
+
+static const struct nvgpu_os_fence_ops sema_ops = {
+        .program_waits = nvgpu_os_fence_sema_wait_gen_cmd,
+        .drop_ref = nvgpu_os_fence_android_drop_ref,
+};
+
+int nvgpu_os_fence_sema_create(
+        struct nvgpu_os_fence *fence_out,
+        struct channel_gk20a *c,
+        struct nvgpu_semaphore *sema)
+{
+        struct sync_fence *fence;
+
+        fence = gk20a_sync_fence_create(c, sema, "f-gk20a-0x%04x",
+                        nvgpu_semaphore_gpu_ro_va(sema));
+
+        if (!fence) {
+                nvgpu_err(c->g, "error constructing new fence: f-gk20a-0x%04x",
+                        (u32)nvgpu_semaphore_gpu_ro_va(sema));
+
+                return -ENOMEM;
+        }
+
+        nvgpu_os_fence_init(fence_out, c->g, &sema_ops, fence);
+
+        return 0;
+}
+
+int nvgpu_os_fence_sema_fdget(struct nvgpu_os_fence *fence_out,
+        struct channel_gk20a *c, int fd)
+{
+        struct sync_fence *fence = gk20a_sync_fence_fdget(fd);
+
+        if (!fence)
+                return -EINVAL;
+
+        nvgpu_os_fence_init(fence_out, c->g, &sema_ops, fence);
+
+        return 0;
+}