gpu: nvgpu: Add NVIDIA GPU Driver

This patch moves the NVIDIA GPU driver to a new location.

Bug 1482562

Change-Id: I24293810b9d0f1504fd9be00135e21dad656ccb6
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/383722
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c b/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c
new file mode 100644
index 00000000..aea1a80b
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c
@@ -0,0 +1,91 @@
+/*
+ * GK20A priv ring
+ *
+ * Copyright (c) 2011-2014, 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/delay.h>        /* for mdelay */
+
+#include "gk20a.h"
+#include "hw_mc_gk20a.h"
+#include "hw_pri_ringmaster_gk20a.h"
+#include "hw_pri_ringstation_sys_gk20a.h"
+#include "hw_trim_gk20a.h"
+
+void gk20a_reset_priv_ring(struct gk20a *g)
+{
+        u32 data;
+
+        if (tegra_platform_is_linsim())
+                return;
+
+        data = gk20a_readl(g, trim_sys_gpc2clk_out_r());
+        data = set_field(data,
+                        trim_sys_gpc2clk_out_bypdiv_m(),
+                        trim_sys_gpc2clk_out_bypdiv_f(0));
+        gk20a_writel(g, trim_sys_gpc2clk_out_r(), data);
+
+        gk20a_reset(g, mc_enable_priv_ring_enabled_f());
+
+        gk20a_writel(g,pri_ringmaster_command_r(),
+                        0x4);
+
+        gk20a_writel(g, pri_ringstation_sys_decode_config_r(),
+                        0x2);
+
+        gk20a_readl(g, pri_ringstation_sys_decode_config_r());
+}
+
+void gk20a_priv_ring_isr(struct gk20a *g)
+{
+        u32 status0, status1;
+        u32 cmd;
+        s32 retry = 100;
+
+        if (tegra_platform_is_linsim())
+                return;
+
+        status0 = gk20a_readl(g, pri_ringmaster_intr_status0_r());
+        status1 = gk20a_readl(g, pri_ringmaster_intr_status1_r());
+
+        gk20a_dbg_info("ringmaster intr status0: 0x%08x,"
+                "status1: 0x%08x", status0, status1);
+
+        if (status0 & (0x1 | 0x2 | 0x4)) {
+                gk20a_reset_priv_ring(g);
+        }
+
+        cmd = gk20a_readl(g, pri_ringmaster_command_r());
+        cmd = set_field(cmd, pri_ringmaster_command_cmd_m(),
+                pri_ringmaster_command_cmd_ack_interrupt_f());
+        gk20a_writel(g, pri_ringmaster_command_r(), cmd);
+
+        do {
+                cmd = pri_ringmaster_command_cmd_v(
+                        gk20a_readl(g, pri_ringmaster_command_r()));
+                usleep_range(20, 40);
+        } while (cmd != pri_ringmaster_command_cmd_no_cmd_v() && --retry);
+
+        if (retry <= 0)
+                gk20a_warn(dev_from_gk20a(g),
+                        "priv ringmaster cmd ack too many retries");
+
+        status0 = gk20a_readl(g, pri_ringmaster_intr_status0_r());
+        status1 = gk20a_readl(g, pri_ringmaster_intr_status1_r());
+
+        gk20a_dbg_info("ringmaster intr status0: 0x%08x,"
+                " status1: 0x%08x", status0, status1);
+}
+