gpu: nvgpu: add nvhost abstraction files

Add new abstraction file common/linux/nvhost.c for all
nvhost APIs and operations and export them from
header <nvgpu/nvhost.h>

This file will be compiled only if config
CONFIG_TEGRA_GK20A_NVHOST is set

Define struct nvgpu_nvhost_dev in a separate private
header nvhost_priv.h

Jira NVGPU-29

Change-Id: I17e1f7836d4854feadff0c339bc093e78ba7f3eb
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1489725
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

2 files changed, 232 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/nvhost.c b/drivers/gpu/nvgpu/common/linux/nvhost.c
new file mode 100644
index 00000000..19e41e17
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/linux/nvhost.c
@@ -0,0 +1,208 @@
+/*
+ * 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 <linux/nvhost.h>
+#include <linux/nvhost_ioctl.h>
+#include <linux/of_platform.h>
+
+#include <nvgpu/nvhost.h>
+
+#include "nvhost_priv.h"
+
+#include "gk20a/gk20a.h"
+
+int nvgpu_get_nvhost_dev(struct gk20a *g)
+{
+        struct device_node *np = g->dev->of_node;
+        struct platform_device *host1x_pdev = NULL;
+        const __be32 *host1x_ptr;
+
+        host1x_ptr = of_get_property(np, "nvidia,host1x", NULL);
+        if (host1x_ptr) {
+                struct device_node *host1x_node =
+                        of_find_node_by_phandle(be32_to_cpup(host1x_ptr));
+
+                host1x_pdev = of_find_device_by_node(host1x_node);
+                if (!host1x_pdev) {
+                        dev_warn(g->dev, "host1x device not available");
+                        return -EPROBE_DEFER;
+                }
+
+        } else {
+                host1x_pdev = to_platform_device(g->dev->parent);
+                dev_warn(g->dev, "host1x reference not found. assuming host1x to be parent");
+        }
+
+        g->nvhost_dev = nvgpu_kzalloc(g, sizeof(struct nvgpu_nvhost_dev));
+        if (!g->nvhost_dev)
+                return -ENOMEM;
+
+        g->nvhost_dev->host1x_pdev = host1x_pdev;
+
+        return 0;
+}
+
+void nvgpu_free_nvhost_dev(struct gk20a *g)
+{
+        nvgpu_kfree(g, g->nvhost_dev);
+}
+
+int nvgpu_nvhost_module_busy_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev)
+{
+        return nvhost_module_busy_ext(nvhost_dev->host1x_pdev);
+}
+
+void nvgpu_nvhost_module_idle_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev)
+{
+        nvhost_module_idle_ext(nvhost_dev->host1x_pdev);
+}
+
+void nvgpu_nvhost_debug_dump_device(
+        struct nvgpu_nvhost_dev *nvhost_dev)
+{
+        nvhost_debug_dump_device(nvhost_dev->host1x_pdev);
+}
+
+const char *nvgpu_nvhost_syncpt_get_name(
+        struct nvgpu_nvhost_dev *nvhost_dev, int id)
+{
+        return nvhost_syncpt_get_name(nvhost_dev->host1x_pdev, id);
+}
+
+bool nvgpu_nvhost_syncpt_is_valid_pt_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id)
+{
+        return nvhost_syncpt_is_valid_pt_ext(nvhost_dev->host1x_pdev, id);
+}
+
+int nvgpu_nvhost_syncpt_is_expired_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id, u32 thresh)
+{
+        return nvhost_syncpt_is_expired_ext(nvhost_dev->host1x_pdev,
+                        id, thresh);
+}
+
+u32 nvgpu_nvhost_syncpt_incr_max_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id, u32 incrs)
+{
+        return nvhost_syncpt_incr_max_ext(nvhost_dev->host1x_pdev, id, incrs);
+}
+
+int nvgpu_nvhost_intr_register_notifier(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id, u32 thresh,
+        void (*callback)(void *, int), void *private_data)
+{
+        return nvhost_intr_register_notifier(nvhost_dev->host1x_pdev,
+                        id, thresh,
+                        callback, private_data);
+}
+
+void nvgpu_nvhost_syncpt_set_min_eq_max_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id)
+{
+        nvhost_syncpt_set_min_eq_max_ext(nvhost_dev->host1x_pdev, id);
+}
+
+void nvgpu_nvhost_syncpt_put_ref_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id)
+{
+        nvhost_syncpt_put_ref_ext(nvhost_dev->host1x_pdev, id);
+}
+
+u32 nvgpu_nvhost_get_syncpt_host_managed(
+        struct nvgpu_nvhost_dev *nvhost_dev,
+        u32 param, const char *syncpt_name)
+{
+        return nvhost_get_syncpt_host_managed(nvhost_dev->host1x_pdev,
+                        param, syncpt_name);
+}
+
+int nvgpu_nvhost_syncpt_wait_timeout_ext(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id,
+        u32 thresh, u32 timeout, u32 *value, struct timespec *ts)
+{
+        return nvhost_syncpt_wait_timeout_ext(nvhost_dev->host1x_pdev,
+                id, thresh, timeout, value, ts);
+}
+
+int nvgpu_nvhost_syncpt_read_ext_check(
+        struct nvgpu_nvhost_dev *nvhost_dev, u32 id, u32 *val)
+{
+        return nvhost_syncpt_read_ext_check(nvhost_dev->host1x_pdev, id, val);
+}
+
+int nvgpu_nvhost_create_symlink(struct gk20a *g)
+{
+        struct device *dev = g->dev;
+        int err = 0;
+
+        if (g->nvhost_dev &&
+                        (dev->parent != &g->nvhost_dev->host1x_pdev->dev)) {
+                err = sysfs_create_link(&g->nvhost_dev->host1x_pdev->dev.kobj,
+                                &dev->kobj,
+                                dev_name(dev));
+        }
+
+        return err;
+}
+
+void nvgpu_nvhost_remove_symlink(struct gk20a *g)
+{
+        struct device *dev = g->dev;
+
+        if (g->nvhost_dev &&
+                        (dev->parent != &g->nvhost_dev->host1x_pdev->dev)) {
+                sysfs_remove_link(&g->nvhost_dev->host1x_pdev->dev.kobj,
+                                  dev_name(dev));
+        }
+}
+
+#ifdef CONFIG_SYNC
+u32 nvgpu_nvhost_sync_pt_id(struct sync_pt *pt)
+{
+        return nvhost_sync_pt_id(pt);
+}
+
+u32 nvgpu_nvhost_sync_pt_thresh(struct sync_pt *pt)
+{
+        return nvhost_sync_pt_thresh(pt);
+}
+
+struct sync_fence *nvgpu_nvhost_sync_fdget(int fd)
+{
+        return nvhost_sync_fdget(fd);
+}
+
+int nvgpu_nvhost_sync_num_pts(struct sync_fence *fence)
+{
+        return nvhost_sync_num_pts(fence);
+}
+
+struct sync_fence *nvgpu_nvhost_sync_create_fence(
+        struct nvgpu_nvhost_dev *nvhost_dev,
+        u32 id, u32 thresh,
+        u32 num_pts, const char *name)
+{
+        struct nvhost_ctrl_sync_fence_info pt = {
+                .id = id,
+                .thresh = thresh,
+        };
+
+        return nvhost_sync_create_fence(nvhost_dev->host1x_pdev, &pt, num_pts, name);
+}
+#endif /* CONFIG_SYNC */
diff --git a/drivers/gpu/nvgpu/common/linux/nvhost_priv.h b/drivers/gpu/nvgpu/common/linux/nvhost_priv.h
new file mode 100644
index 00000000..c03390a7
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/linux/nvhost_priv.h
@@ -0,0 +1,24 @@
+/*
+ * 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/>.
+ */
+
+#ifndef __NVGPU_NVHOST_PRIV_H__
+#define __NVGPU_NVHOST_PRIV_H__
+
+struct nvgpu_nvhost_dev {
+        struct platform_device *host1x_pdev;
+};
+
+#endif /* __NVGPU_NVHOST_PRIV_H__ */