gpu: nvgpu: vgpu: restructure vgpu clk implementation

Move OS agnostic parts of vgpu clk code out of os/linux specific
path. This includes implementation sending rpc commands to
RM Server. Move Linux specific vgpu clk code to platform vgpu files
keeping it consistent with native implementation.

Bug 2363882
Jira EVLR-3254

Change-Id: I0aae014ef16415bb356c81e9bfd76bc65206d9fd
Signed-off-by: Aparna Das <aparnad@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1820674
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/clk_vgpu.c b/drivers/gpu/nvgpu/vgpu/clk_vgpu.c
new file mode 100644
index 00000000..efcb4fb0
--- /dev/null
+++ b/drivers/gpu/nvgpu/vgpu/clk_vgpu.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <nvgpu/vgpu/vgpu.h>
+
+#include "gk20a/gk20a.h"
+#include "clk_vgpu.h"
+#include "ctrl/ctrlclk.h"
+
+static unsigned long
+vgpu_freq_table[TEGRA_VGPU_GPU_FREQ_TABLE_SIZE];
+
+static unsigned long vgpu_clk_get_rate(struct gk20a *g, u32 api_domain)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct tegra_vgpu_gpu_clk_rate_params *p = &msg.params.gpu_clk_rate;
+        int err;
+        unsigned long ret = 0;
+
+        nvgpu_log_fn(g, " ");
+
+        switch (api_domain) {
+        case CTRL_CLK_DOMAIN_GPCCLK:
+                msg.cmd = TEGRA_VGPU_CMD_GET_GPU_CLK_RATE;
+                msg.handle = vgpu_get_handle(g);
+                err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+                err = err ? err : msg.ret;
+                if (err)
+                        nvgpu_err(g, "%s failed - %d", __func__, err);
+                else
+                        /* return frequency in Hz */
+                        ret = p->rate * 1000;
+                break;
+        case CTRL_CLK_DOMAIN_PWRCLK:
+                nvgpu_err(g, "unsupported clock: %u", api_domain);
+                break;
+        default:
+                nvgpu_err(g, "unknown clock: %u", api_domain);
+                break;
+        }
+
+        return ret;
+}
+
+static int vgpu_clk_set_rate(struct gk20a *g,
+                                u32 api_domain, unsigned long rate)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct tegra_vgpu_gpu_clk_rate_params *p = &msg.params.gpu_clk_rate;
+        int err = -EINVAL;
+
+        nvgpu_log_fn(g, " ");
+
+        switch (api_domain) {
+        case CTRL_CLK_DOMAIN_GPCCLK:
+                msg.cmd = TEGRA_VGPU_CMD_SET_GPU_CLK_RATE;
+                msg.handle = vgpu_get_handle(g);
+
+                /* server dvfs framework requires frequency in kHz */
+                p->rate = (u32)(rate / 1000);
+                err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+                err = err ? err : msg.ret;
+                if (err)
+                        nvgpu_err(g, "%s failed - %d", __func__, err);
+                break;
+        case CTRL_CLK_DOMAIN_PWRCLK:
+                nvgpu_err(g, "unsupported clock: %u", api_domain);
+                break;
+        default:
+                nvgpu_err(g, "unknown clock: %u", api_domain);
+                break;
+        }
+
+        return err;
+}
+
+static unsigned long vgpu_clk_get_maxrate(struct gk20a *g, u32 api_domain)
+{
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
+
+        return priv->constants.max_freq;
+}
+
+void vgpu_init_clk_support(struct gk20a *g)
+{
+        g->ops.clk.get_rate = vgpu_clk_get_rate;
+        g->ops.clk.set_rate = vgpu_clk_set_rate;
+        g->ops.clk.get_maxrate = vgpu_clk_get_maxrate;
+}
+
+int vgpu_clk_get_freqs(struct gk20a *g, unsigned long **freqs, int *num_freqs)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct tegra_vgpu_get_gpu_freq_table_params *p =
+                                        &msg.params.get_gpu_freq_table;
+        unsigned int i;
+        int err;
+
+        nvgpu_log_fn(g, " ");
+
+        msg.cmd = TEGRA_VGPU_CMD_GET_GPU_FREQ_TABLE;
+        msg.handle = vgpu_get_handle(g);
+
+        p->num_freqs = TEGRA_VGPU_GPU_FREQ_TABLE_SIZE;
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+        if (err) {
+                nvgpu_err(g, "%s failed - %d", __func__, err);
+                return err;
+        }
+
+        /* return frequency in Hz */
+        for (i = 0; i < p->num_freqs; i++)
+                vgpu_freq_table[i] = p->freqs[i] * 1000;
+
+        *freqs = vgpu_freq_table;
+        *num_freqs = p->num_freqs;
+
+        return 0;
+}
+
+int vgpu_clk_cap_rate(struct gk20a *g, unsigned long rate)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct tegra_vgpu_gpu_clk_rate_params *p = &msg.params.gpu_clk_rate;
+        int err = 0;
+
+        nvgpu_log_fn(g, " ");
+
+        msg.cmd = TEGRA_VGPU_CMD_CAP_GPU_CLK_RATE;
+        msg.handle = vgpu_get_handle(g);
+        p->rate = (u32)rate;
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+        if (err) {
+                nvgpu_err(g, "%s failed - %d", __func__, err);
+                return err;
+        }
+
+        return 0;
+}