[Nouveau] [PATCH v3 10/29] add daemon to compare nouveau with blob voltage

[Karol Herbst]

this tool can be run alongside the nvidia driver to print information about
the current p/cstate, which voltage was set by nvidia and what nouveau would
set in the same situation.

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 bin/nv_cmp_volt.c | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 bin/nv_cmp_volt.c

diff --git a/bin/nv_cmp_volt.c b/bin/nv_cmp_volt.c
new file mode 100644
index 0000000..6147a7d
--- /dev/null
+++ b/bin/nv_cmp_volt.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2016 Karol Herbst
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Karol Herbst
+ */
+
+#include <nvif/client.h>
+#include <nvif/device.h>
+#include <nvif/class.h>
+
+#include <nvkm/subdev/volt.h>
+
+#include "util.h"
+
+int
+main(int argc, char **argv)
+{
+	struct nvif_client if_client;
+	struct nvif_device if_device;
+	struct nvkm_clk *clk;
+	struct nvkm_volt *volt;
+	struct nvkm_device *device;
+	int ret;
+	int old_voltage = 0, old_nouveau_voltage = 0, old_pstate = 0;
+	int old_cstate = 0, old_temp = 0;
+
+	ret = u_device("lib", argv[0], "error", true, true,
+                       (1ULL << NVKM_SUBDEV_CLK) |
+//                       (1ULL << NVKM_SUBDEV_FUSE) |
+                       (1ULL << NVKM_SUBDEV_GPIO) |
+//                       (1ULL << NVKM_SUBDEV_I2C) |
+                       (1ULL << NVKM_SUBDEV_PCI) |
+//                       (1ULL << NVKM_SUBDEV_THERM) |
+//                       (1ULL << NVKM_SUBDEV_TIMER) |
+                       (1ULL << NVKM_SUBDEV_VBIOS) |
+                       (1ULL << NVKM_SUBDEV_VOLT),
+                       0x00000000, &if_client, &if_device);
+
+	if (ret < 0)
+		return ret;
+
+	device = nvxx_device(&if_device);
+	clk = device->clk;
+//	therm = device->therm;
+	volt = device->volt;
+
+	printf("current voltage (µV), expected voltage (µV), abs diff (µV),"
+	       "rel diff nouveau/nvidia (%%), pstate, cstate, temperature"
+	       "(°C)\n");
+	while (true) {
+		int gpc_clock = nvkm_clk_read(clk, nv_clk_src_gpc);
+		int mem_clock = nvkm_clk_read(clk, nv_clk_src_mem);
+		struct nvkm_pstate *pstate = NULL, *best_pstate = NULL;
+		struct nvkm_cstate *cstate = NULL, *best_cstate = NULL;
+		int mem_err, gpc_err;
+		int new_voltage, new_nouveau_voltage, new_pstate, new_cstate;
+		int new_temp;
+
+		list_for_each_entry(pstate, &clk->states, head) {
+			list_for_each_entry(cstate, &pstate->list, head) {
+				if (!best_pstate) {
+					best_pstate = pstate;
+					best_cstate = cstate;
+					gpc_err = abs(cstate->domain[nv_clk_src_gpc] - gpc_clock);
+					mem_err = abs(cstate->domain[nv_clk_src_mem] - mem_clock);
+					continue;
+				}
+
+				if (abs(cstate->domain[nv_clk_src_gpc] - gpc_clock) <= gpc_err &&
+				    abs(cstate->domain[nv_clk_src_mem] - mem_clock) <= mem_err) {
+					best_pstate = pstate;
+					best_cstate = cstate;
+					gpc_err = abs(cstate->domain[nv_clk_src_gpc] - gpc_clock);
+					mem_err = abs(cstate->domain[nv_clk_src_mem] - mem_clock);
+				}
+			}
+
+			if (!best_pstate) {
+				best_pstate = pstate;
+				mem_err = abs(cstate->domain[nv_clk_src_mem] - mem_clock);
+				continue;
+			} else if (!best_cstate && (pstate->base.domain[nv_clk_src_mem] - mem_clock) <= mem_err) {
+				best_pstate = pstate;
+				mem_err = abs(cstate->domain[nv_clk_src_mem] - mem_clock);
+			}
+		}
+
+		if (!best_cstate)
+			best_cstate = &best_pstate->base;
+
+		new_voltage = nvkm_volt_get(volt);
+		new_temp = nvkm_rd32(device, 0x20400);//nvkm_therm_temp_get(therm);
+		new_nouveau_voltage = max(nvkm_volt_map(volt, best_cstate->voltage), nvkm_volt_map(volt, best_pstate->base.voltage));
+		new_pstate = best_pstate->pstate;
+		new_cstate = best_cstate->cstate;
+
+		if (new_voltage != old_voltage || new_nouveau_voltage != old_nouveau_voltage || new_pstate != old_pstate || new_cstate != old_cstate || new_temp != old_temp) {
+			old_voltage = new_voltage;
+			old_nouveau_voltage = new_nouveau_voltage;
+			old_pstate = new_pstate;
+			old_cstate = new_cstate;
+			old_temp = new_temp;
+			printf("%i, %i, %i, %f, %i, %i, %i\n", new_voltage,
+			       new_nouveau_voltage, new_nouveau_voltage - new_voltage,
+			       100 * (double)new_nouveau_voltage / new_voltage,
+			       new_pstate, new_cstate, new_temp);
+		}
+		usleep(100000);
+	}
+
+	return 0;
+}
-- 
2.8.1